Journal articles: 'Main gear'

1

Ding, Yuan, Xia Li, Yong Ji Yang, Shi Qiang Ma, and Yue Xue Pan. "Ascertainment of Machine Tool Adjustment and Processing Parameters for Spiral Bevel Gears in a Heavy Vehicle Main Driving System." Advanced Materials Research 616-618 (December 2012): 2030–33. http://dx.doi.org/10.4028/www.scientific.net/amr.616-618.2030.

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Based on partial conjugation principle, revised machine tool adjustment parameters and processing parameters which can make big gear and small gear be in points conjugation meshing progress are obtained after the cutting tooth plan and rough gear parameters of spiral bevel gears in a heavy vehicle main driving system were determined. Ideal gear contact spots are gained by gear contact area rolling experiment, which show that calculation theory and methods above-described are practicable and effective for improving meshing quality of spiral bevel gears in heavy vehicle main driving system.

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2

Janulevičius, Algirdas, and Kazimieras Giedra. "ANALYSIS OF MAIN DYNAMIC PARAMETERS OF SPLIT POWER TRANSMISSION." TRANSPORT 23, no. 2 (June 30, 2008): 112–18. http://dx.doi.org/10.3846/1648-4142.2008.23.112-118.

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The review carried out had shown one basic approach of split power transmission to the organization of drive which is applied to stepless transmissions of tractors and parallel hybrid cars. In the split power transmission the power split device uses a planetary gear. Tractor engine power in the split power transmission is transmitted to the drive shaft via a mechanical and hydraulic path. The theoretical analysis of main parameters of the split power transmission of the tractor is presented. The angular velocity of sun and coronary gears of the differential set is estimated by solution of the system of equations in which one equation is made for planetary differential gear, and another ‐ for hydrostatic drive. The analysis of the transmission gear‐ratio dependencies on the ratio of hydraulic machines capacities is carried out. Dependence of the variation of angular velocity of the coronary and the sun gears on the ground speed of the tractor is presented. Dependence of sum shaft torque and its constituents, carried by mechanical and hydraulic lines, on sum shaft angular velocity and ground speed of tractor and engine speed is also presented.

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3

Song, Ai Ping, Wen Jie Gao, and Shang Gao. "Research on Trapping Oil Property and Operating Characteristic of Arch Gear Pump." Advanced Materials Research 230-232 (May 2011): 107–12. http://dx.doi.org/10.4028/www.scientific.net/amr.230-232.107.

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The arch gear pump is a new kind of gear pump. Based on the mesh characteristics of arch gears, the relations between the operating characteristic and the main parameters of arch gear are analyzed. The conclusion is drawn: the arch gear pump’s non-pocketed oil phenomena can be achieved with opting for the main parameters of arch gear; the pump can work smoothly and get high efficiency.

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4

Sun, Ying Shi, Tian Min Guan, and Xu Zhang. "Dynamic Simulation of Cycloid Wheel at Two Support Points of Needle Gear pin for New Three-Gear Pin-Cycloid Driven Speed Reducer." Advanced Materials Research 291-294 (July 2011): 1195–99. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.1195.

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Pin-cycloid driven speed reducer with three cycloid gears adopts the new driving structure of three cycloid gears at eccentric angle of 120 between each other. Three main stresses act on the cycloid gears: the stress between pin gear and cycloid wheel gear, the stress on cycloid wheel by cylinder pin of output mechanism and the stress on cycloid wheel by bearing of rotating arm. In this paper, the stress between needle gear and cycloid wheel gear is analyzed mainly by analysis.

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5

Alipiiev, Ognyan. "Bidirectional modification of gears in the generalized theory of meshing." MATEC Web of Conferences 287 (2019): 01006. http://dx.doi.org/10.1051/matecconf/201928701006.

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An important part of “Generalized theory”, developed by the author of this article, is the “bidirectional modification” of involute gears. The main point of the proposed modification is that together with the traditional “radial modification” of the basic rack, an additional “tangential modification” of the side profiles of the rack-cutters is introduced. As a result, the area of possible existence of involute gear drives in the generalized theory is considerably extended. Based on the bidirectional modification, a new classification of involute gears at their meshing with a rack cutter is proposed. The classification is characterized by a significant variety, which is composed of thirteen different types of gears: a zero gear; two radially modified gears; two tangentially modified gears and eight two-way modified gears. Based on the bidirectional modification in radial and tangential directions, a new classification of the involute gear drives is proposed. The classification is composed of sixteen different types of gear drives: a zero gear drive, three equally-modified gear drives; two balanced gear drives; five positive gear drives and five negative gear drives.

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6

Cui, Huan Yong, Xi Jie Tian, and Dong Liang Wang. "Design Technique Research of Fine-Forged Spur Bevel Gear Tooth Profile Modification." Key Engineering Materials 443 (June 2010): 170–76. http://dx.doi.org/10.4028/www.scientific.net/kem.443.170.

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Gear tooth profile modification can be featured to improve working stability of gear equipments, abate noise and vibration, enhance loading ability and prolong usage life of the gears. Fine forged spur bevel gear are formed with molds, so it is economical to modify the gears by means of modifying mold cavity. Whether the modified gears can be separated from the mold with easiness is proposed to be the basic criterion of gear tooth profile modification design. Near the big ends and tooth roots is mainly the area which affects demolding after modification. According to the modified gear configuration, mathematical model is built to calculate the demolding check at any modification points on the fine forged spur bevel gear profile. And a corresponding program is developed, which is the main tool for the gear tooth profile modification design, and practical calculation has carried out.

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7

Surnis, Prathmesh. "Design and Analysis of 2-Stage Gearbox for ATV Applications." International Journal for Research in Applied Science and Engineering Technology 9, no. 9 (September 30, 2021): 2193–210. http://dx.doi.org/10.22214/ijraset.2021.38326.

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Abstract: The main objective of this project is to design and develop a 2-Stage- Reduction gearbox for all terrain vehicles application. Gearbox is a mechanical unit consisting of series of gears within a housing (casing) or a simple gear train. It is the main component of the powertrain system as it provides speed and torque conversions from the Engine or CVT to the wheels. The gears inside of gearbox can be any one of a number of different types of the gear that are available in the market i.e., from spur gears to worm gears and planetary gears as well. In this report the gearbox is made from a helical gear train. This report focuses on selection of overall reduction ratio of the gearbox, material selection, selection of gear dimensions, selection of shaft dimension, design of key and bearing selection from SKF bearing catalogue. The bending and wear strengths are calculated to determine factor of safety and later, Finite element analysis is performed to validate the results. Keywords: Geartrain, Shaft Design, SKF Bearings, Solidworks, FEA

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Wu, Yi-Chang, and Tze-Cheng Wu. "EMBODIMENT DESIGN OF NOVEL 5-SPEED REAR DRIVE HUBS FOR BICYCLES." Transactions of the Canadian Society for Mechanical Engineering 39, no. 3 (September 2015): 431–41. http://dx.doi.org/10.1139/tcsme-2015-0032.

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This paper presents embodiment design of 5-speed rear drive hubs for bicycles. A 7-link, 2-degrees of freedom (DOF) compound planetary gear train as the main body of a rear drive hub is introduced. The relationship between the number of coaxial links of a planetary gear train and the number of gear stages that a drive hub can provide with is discussed. By means of kinematic analysis, four speed ratios of the planetary gear train are derived, which represents four forward gears of the rear drive hub. By adding a direct-drive gear, five forward gears can be provided and two feasible clutching sequence tables are synthesized. Manual translational-type gear-shifting mechanisms are further designed to incorporate with the planetary gear train for appropriately controlling the gear stage. The power-flow path at each gear stage is checked to verify the feasibility of the proposed design. Finally, two novel 5-speed bicycle rear drive hubs are presented.

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9

Koval'chuk, Oleksandr, Volodymyr Nezhebovs'kyj, Alexander Permyakov, Alexander Klochko, and Serhii Riabchenko. "PROCESSING OF HARDENED CYLINDRICAL GEAR WHEELS OF THE CUTTING GEARBOX OF THE COMBINE UKD 200-500." Cutting & Tools in Technological System, no. 95 (December 26, 2021): 57–70. http://dx.doi.org/10.20998/2078-7405.2021.95.07.

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The article discusses the latest developments of unique technological methods of gear milling of cylindrical gears for preliminary blade gear processing of hardened cylindrical gears of the cutting reducer of the UKD200-500 coal mining harvester for the final gear grinding of gear teeth with modulus m = 16 mm, with hardness HRC 56 ... 62. The peculiarity of the design of special hob cutters is that a circle passing through the lower boundary points of the involute is used as the palloid of the machine gearing of the tool and part. Pre-cutting the teeth of hardened wheels with carbide milling cutters allows you to remove the main allowance for the final gear grinding.

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10

Xuejun, Li, Jiang Lingli, Hua Dengrong, Yin Daoxuan, and Yang Dalian. "An Analysis of the Gear Meshing Characteristics of the Main Planetary Gear Trains of Helicopters Undergoing Shafting Position Changes." International Journal of Aerospace Engineering 2021 (July 30, 2021): 1–12. http://dx.doi.org/10.1155/2021/9965818.

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The complex three-shaft three-reducer structural designs of helicopter transmission systems are prone to changes in the relative positions of shafting under the conditions of main rotor and tail rotor loads. These changes will affect the transmission characteristics of the entire transmission system. In this study, the planetary gear trains of helicopters were examined. Due to the fact that these structures are considered to be the most representative structures of the main reducers of helicopters, they were selected as the study objects for the purpose of examining the meshing characteristics of planetary gear trains when the relative positions of the shafting changed due to the position changes of the main rotor shafts under variable load conditions. It was found that by embedding the comprehensive time-varying meshing stiffness values of the main rotor shafts at different positions, a dynamic model of the relative position changes of the planetary gear trains could be established. Then, combined with the multibody dynamics software, the meshing characteristics of the sun gears, and the planetary gears, the planetary gears and the inner ring gears were simulated and analyzed under different inclinations and offsets of the shafting. The results obtained in this study revealed the following: (1) the average meshing force of the gears increased with the increases in the angle inclinations, and the meshing force between the sun gears and the planetary gears increased faster than the meshing force between the planetary gears and the inner ring gears. It was observed that during the changes in the shafting tilt positions, obvious side frequency signals had appeared around the peak of the meshing frequency in the spectrum. Then, with the continuous increases in the tilt position, the peak was gradually submerged; (2) the average meshing force of the gears increased with the increases in the offset, and the increasing trend of the meshing force between the sun gears and the planetary gears was similar to that observed between the planetary gears and the inner ring gears. It was found that when the shafting offset position changed, there were obvious first and second frequency doubling in the spectrum; (3) the mass center orbit radii of the sun gears increased with the increases in the shafting position changes, and the changes in the angular tilt position were found to have greater influencing effects on the mass center orbit radii of the sun gears than the changes in the offset positions. This study’s research findings will provide a theoretical basis for future operational status monitoring of the main transmission systems of helicopters and are of major significance for improvements in the operational stability of helicopter transmission systems, which will potentially ensure safe and efficient operations.

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11

Wandono, Fajar Ari. "Optimization of the Main Landing Gear Structure of LSU-02NGLD." Computational And Experimental Research In Materials And Renewable Energy 4, no. 1 (May 28, 2021): 30. http://dx.doi.org/10.19184/cerimre.v4i1.24965.

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The mass of the landing gear structure becomes an important aspect of the total mass of the UAV (unmanned aerial vehicle). Therefore, many efforts have been made to reduce the mass of the landing gear by performing structural optimization. Reducing the mass of the landing gear structure can be used as a substitute to increase the payload on the UAV. The landing gear structure in this paper is the main landing gear of LSU-02NGLD (LAPAN Surveillance UAV series 02 New Generation Low Drag). LSU-02NGLD is a UAV that has 2.9 m of wingspan with a total mass of 21 kg. This paper aims to optimize the main landing gear structure so that optimization can reduce the mass. The optimization was carried out using the finite element software by modeling the main landing gear structure as a 1D beam element. There were 9 beam elements in the main landing gear structure model. The cross-sectional width (w) and the cross-sectional height (h) for each element were used as design variables. The objective of the optimization was to minimize the mass while maintaining maximum bending stress not greater than 20 MPa, displacement in y-direction not greater than 1 mm, and displacement in z-direction not greater than 0.1 mm. The optimization result showed that the mass reduction of the main landing gear structure was 50%, with all constraints fulfilled.

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12

Zorko, Damijan, Jože Duhovnik, and Jože Tavčar. "Tooth bending strength of gears with a progressive curved path of contact." Journal of Computational Design and Engineering 8, no. 4 (June 18, 2021): 1037–58. http://dx.doi.org/10.1093/jcde/qwab031.

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Abstract The article presents a comprehensive study on the tooth bending strength of spur gears with a progressive curved path of contact, or so-called S-gears. Systematic gear meshing simulations were conducted to study the effects of S-gear geometry parameters on tooth bending strength. Different S-gear geometries were analysed in a systematically organized manner, and a comparison was made against a standard 20° pressure angle involute shape. Furthermore, different material combinations, e.g. polymer/polymer, steel/polymer, and steel/steel, of both drive and driven gear were analysed within a meaningful range of loads. The gear profile shape, material combination of the drive and the driven gear, and the transmitted load were found as the main parameters affecting gear tooth bending stress. Complex, non-linear relations between the recognized effects and the corresponding root stress were observed. Based on the numerical results, a shape factor, which considers the above-mentioned effects, was introduced, and a model for root strength control of S-gears was proposed and verified employing the finite element method (FEM).

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13

Ma, Yong, Qi Huang, Tian Ji, and Zhi Feng Lou. "Study on the Effect of Ways of Gear Relief on Contact Force of Teeth Face." Advanced Materials Research 415-417 (December 2011): 66–70. http://dx.doi.org/10.4028/www.scientific.net/amr.415-417.66.

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An accurate finite element contact analysis of helical gears was done directly under ANSYS, while the integrated elastic deformation of the meshed teeth was extracted directly from the finite element contact analysis results, and considered as the main basis of the amount of tooth profile modification. Linear, conic, cubic, and sine relief curve are compiled and established in MATLAB, on which gear models of two ways of modified gear are built. Under the same modified parameters, contact method is used on the proposed finite element models of gears by software LS-DYNA, and the effect of the two ways of gear relief on contact force on teeth face is analyzed. The results show that the effect of a pair of gears relief is better than one gear relief for linear and conic relief curve, and the effect of one gear relief is better than a pair of gears relief for cubic and sine relief curve. So dynamic simulation on modified involute gears has great significance for reducing contact force of teeth face of gears.

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14

Michalczewski, Remigiusz, Marek Kalbarczyk, Waldemar Tuszynski, and Marian Szczerek. "The Scuffing Resistance of WC/C Coated Spiral Bevel Gears." Key Engineering Materials 604 (March 2014): 36–40. http://dx.doi.org/10.4028/www.scientific.net/kem.604.36.

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One of the main problems with the operation of spiral bevel gears is related to very severe conditions in the contact of the meshing teeth; therefore, lubrication is very difficult, which increases the risk of scuffing occurrence. One of the ways to achieve better scuffing resistance is by the deposition of a low-friction coating on the bevel gears teeth. Gear scuffing tests were performed using a bevel gear test rig designed and manufactured at ITeE-PIB. The authorial bevel gear scuffing test was performed. Specially designed, spiral bevel gears were used for testing. Two material combinations were tested: uncoated pinion - coated wheel and, for reference, both gears without coatings. The a-C:H:W (trade name WC/C) coating of DLC type was deposited on the wheel teeth. A mineral, automotive gear oil of API GL-5 performance level was used for lubrication. It is shown that the resistance to scuffing may be significantly improved when the a-C:H:W coating is deposited on the spiral bevel gear teeth.

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15

Liu, Peng, Ying Ming Li, Kang Huang, and Qi Chen. "Analysis of Helicopter Main Reducer Planetary Gear Contact Strength." Applied Mechanics and Materials 273 (January 2013): 180–83. http://dx.doi.org/10.4028/www.scientific.net/amm.273.180.

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Theoretical method and the finite element method for a helicopter main reduction gear of the planetary gear train are done this article. The contrast drawn: the reliability and accuracy of the finite element simulation method used in the calculation of tooth surface contact stress. Provides an effective approach for accurate analysis of helicopter main reduction planetary gear contact stress.

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Ishin, Nikolay, Serhii Gavrylov, Arkadiy Goman, Andrey Skorokhodov, and Juriy Dakalo. "COMPUTATIONAL AND EXPERIMENTAL METHOD FOR ESTIMATING THE RESIDUAL LIFE OF GEARS BASED ON VIBRATION MONITORING DATA." Bulletin of the National Technical University «KhPI» Series: Engineering and CAD, no. 2 (December 30, 2021): 143–48. http://dx.doi.org/10.20998/2079-0775.2021.2.16.

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A computational and experimental method for estimating the residual life of gears in the inter-repair period is proposed. The method is based on the main provisions of the theory of vibration-pulse diagnostics of spur gears, developed at the OIM of the National Academy of Sciences of Belarus. The main performance criteria are the contact and bending endurance of the teeth. Accounting for changes in the value of the coefficient of internal dynamic load in the gearing during the operation of gears is carried out on the basis of vibration analysis during their vibration monitoring. The proposed method makes it possible to estimate the residual life of the gear mechanism at any stage of operation, providing the opportunity to organize the transition from planned preventive maintenance of machines to maintenance according to the actual condition. An example of estimating the residual life of a gear pair that limits the reliability of a two-row planetary gear motor-wheel of a heavy-duty dump truck is given. Keywords: gear transmission; vibration monitoring; residual life; inter-repair period; internal dynamic load in engagement

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Wang, Guo Jun, Mei Hua Jiang, Shi Shun Zhu, and An Tao Xu. "Bending Fatigue Design Method for Double Sides Loaded Gears." Key Engineering Materials 419-420 (October 2009): 865–68. http://dx.doi.org/10.4028/www.scientific.net/kem.419-420.865.

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Bending fatigue is one of the main failure modes of gears. The method of gear fatigue design was discussed in many papers. Most of them are based on GB/T3480-83.But study shows that the method current widely used only fits for the single side loaded gear. For double sides loaded gear, only a mean stress modification coefficient is concerned compared to single side loaded gear. A new formula based on fatigue theory is given to modify the mean stress in consideration of the load character of doubled sides loaded gear. The method given in the paper is an addition to the traditional gear design method.

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18

Luo, Qiu Ping, Jian Cai, Xiao Shuang Xiong, Song Deng, and Feng Qin Li. "Influence of Technical Parameters on Contact Pressure in Straight Bevel Gear Meshing." Applied Mechanics and Materials 511-512 (February 2014): 582–87. http://dx.doi.org/10.4028/www.scientific.net/amm.511-512.582.

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Wear is one of the main failure modes of gears in the meshing performance, and contact pressure is the key factor to determine the wear of gears. The main purpose of this paper is to investigate the contact pressure distribution and evolution laws in straight bevel gear meshing. Based on a 3D FE model of the specific loaded assembling straight bevel gear pair, the influence of friction coefficientf, torqueTand elastic modulusEon the contact pressure of straight bevel gear in a meshing circle is studied. The results show that the contact area and contact pressure increase dramatically with the increase of the torque. The contact area decreases and the contact pressure increases with the increase of elastic modulus. Friction coefficient almost has no effect on the contact area and contact pressure. This research has great theoretical significance to reveal the wear mechanism and improve the meshing performance of straight bevel gears.

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19

Skel, Vladimir. "Oscillation of gear mechanisms of construction machines." E3S Web of Conferences 263 (2021): 04061. http://dx.doi.org/10.1051/e3sconf/202126304061.

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The article is devoted to the study of the influence of gearing errors on the vibration activity of the open gear transmission of construction machines. A brief review of the literature on the relevance of the topic of gear dynamics in different industries and the results achieved so far is given. The features of open gears of turning mechanisms of construction machines are highlighted: a large gear ratio, a large gearing module, the absence of a common frame for the gear and wheel, poor transmission lubrication conditions, a small degree of precision in the manufacture of gears and the actual overlap coefficient is close to one. With these features, the main internal source of vibration is the difference between the main steps of the gear and the wheel and the error of the involute profile of the teeth. The results of the study of the influence of these features of vibration damping and open gear transmission on the dynamics of the turning mechanism of the construction machine are presented. The studies were carried out on a generalized two-mass nonlinear dynamic model with internal perturbation from the gear pair and with structural damping. The studies were conducted mainly for the transitional modes of resonance. Based on the analysis of the results obtained and presented in the article, recommendations are given to reduce the fluctuations of the turning mechanisms of construction machines.

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20

Güven, Fatih. "Effect of design parameters on stresses occurring at the tooth root in a spur gear pressed on a shaft." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 235, no. 4 (February 14, 2021): 1164–74. http://dx.doi.org/10.1177/0954408921995292.

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Gears are commonly used in transmission systems to adjust velocity and torque. An integral gear or an interference fit could be used in a gearbox. Integral gears are mostly preferred as driving gear for a compact design to reduce the weight of the system. Interference fit makes the replacement of damaged gear possible and re-use of the shaft compared to the integral shaft. However, internal pressure occurs between mating surfaces of the components mated. This internal pressure affects the stress distribution at the root and bottom land of the gear. In this case, gear parameters should be re-considered to assure gear life while reducing the size of the gear. In this study, interference fitted gear-shaft assembly was examined numerically. The effects of rim thickness, profile shifting, module and fit tolerance on bending stress occurring at the root of the gear were investigated to optimize gear design parameters. Finite element models were in good agreement with analytical solutions. Results showed that the rim thickness of the gear is the main parameter in terms of tangential stress occurring at the bottom land of the gear. Positive profile shifting reduces the tangential stress while the pitch diameter of the gear remains constant. Also, lower tolerance class could be selected to moderate stress for small rim thickness.

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21

Abdelrhman, Ahmed Mohammed, Haidar F. AL-Qrimli, Husam M. Hadi., Roaad K. Mohammed, and Hakim S. Sultan. "Times Three Dimensional Spur Gear Static Contact Investigations Using Finite Element Method." Modern Applied Science 10, no. 5 (April 2, 2016): 145. http://dx.doi.org/10.5539/mas.v10n5p145.

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<p>A gear is a critical component and can be found in many industrial applications. This investigation develops a three dimensional finite element spur gear model to calculate the contact stress on the gear tooth surfaces. Contact stress is one of the main factors that is used to decide the gears tooth surface strength. In addition there are other important factors such as frictional forces and micro-pits that influence the gear tooth surface. Different analytical techniques have been used to calculate the contact stress of the gear surfaces namely; Hertzian theory and AGMA standards. The analytical results have been compared to the numerical analysis to verify the spur gear finite element model.</p>

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Macyszyn, Lukasz, Cezary Jedryczka, and Adam Myszkowski. "Simulation and Experimental Investigation of a Two-Stage Magnetic Precession Gear." Energies 14, no. 7 (March 25, 2021): 1838. http://dx.doi.org/10.3390/en14071838.

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Gears are common and important components of many types of propulsion systems applied in mechanical engineering. The aim of this paper is to present the mechanical design and performance analysis of a novel two-stage magnetic precession gear (MPG). The main advantage of the proposed design is the ability to obtain higher transmission ratios than other currently known magnetic gear types. A detailed analysis of the performance of the MPG was carried out employing a developed numerical model of the magnetic field in the proposed gear. The MPG model is based on the finite element method (FEM) and allows determining the relations between the torque acting on the main components of the gear, load angles, and air-gap lengths. To validate the developed FEM model, the prototype of an MPG with a 1/144 gear ratio was built and tested. The experiments were also focused on determining the mechanical efficiency as well as the influence of rotational speed and lengths of air gaps on the maximum load torque. The tests indicated that the maximum efficiency of the studied MPG is about 30%, which is comparable to the efficiency of mechanical two-stage precession gears with face meshing.

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Zheng, Fangyan, Jun Zhang, Ligang Yao, and Rulong Tan. "Investigation on the wear of spur gears generated by modified cutter." Friction 9, no. 2 (July 18, 2020): 288–300. http://dx.doi.org/10.1007/s40544-019-0337-8.

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AbstractTooth surface wear damage is one of the main causes of gearing system failure. Excessive wear leads to tooth profile loss and an increase in transmission errors, as the worn gear surfaces are no longer conjugate. Thus, the enhancement of gear durability against wear is important for gear application. Recent works show that cutter modification can aid in reducing the tool wear in gear processing, while the wear performance of the gears produced by modified cutters is still unknown. Therefore, this study focuses on the wear performance of the gear generated by modified cutter. Numerical results show that the wear resistance can be enhanced through proper cutter modification.

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Liu, Xiaogang, Zhaoyu Wu, Weiguang Shu, and Jie Lu. "Investigation of the effect of the angle between drive shafts on vibration responses of main reducer." MATEC Web of Conferences 189 (2018): 06009. http://dx.doi.org/10.1051/matecconf/201818906009.

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The drive shaft arrangement has a considerable influence on the vibration responses of the shaft-final drive system. In this research, a coupled vibration model is developed based on force analysis of hypoid gear and lumped mass method. The effect of time-varying mesh stiffness, gear backlash and transfer error are included to investigate the effect of the angle between drive shafts on vibration responses of main reducer. The vibration responses of main reducer are acquired using this model. The results show that the vibration amplitude of the gears of main reducer increase with the angle between drive shafts. This paper presents an analytical method to determine the value of the angle between drive shafts, so as to control the vibration of main reducer.

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Atanasovska, Ivana, Radivoje Mitrovic, and Dejan Momcilovic. "Explicit Parametric Method for Optimal Spur Gear Tooth Profile Definition." Advanced Materials Research 633 (January 2013): 87–102. http://dx.doi.org/10.4028/www.scientific.net/amr.633.87.

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The gear tooth profile has an immense effect on the main operating parameters of gear pairs (load capacity, working life, efficiency, vibrations, etc). In current engineering research and practice, there is a strong need to develop methods for tooth profile optimization. In this paper a new method for selecting the optimal tooth profile parameters of spur gears is described. This method has been named the Explicit Parametric Method (EPM). The addendum modification coefficient, radius of root curvature, and pressure angle of the basic rack for cylindrical gears, have been identified as the main tooth profile parameters of spur gears. Therefore, the EPM selects the optimal values for these three tooth profile parameters. Special attention has been paid to develop a method of adjustment for the particular working conditions and explicit optimization requirements. The EPM for optimal tooth profile parameters of gears uses contact nonlinear Finite Element Analysis (FEA) for calculation of deformations and stresses of gear pairs, in addition to explicit comparative diagrams for optimal tooth profile parameter selection.

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Xu, Jin, and Chun Xia Wang. "Small Module Design of Ball Mill Main Drive Gear with Φ2.4×10m." Advanced Materials Research 787 (September 2013): 490–94. http://dx.doi.org/10.4028/www.scientific.net/amr.787.490.

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In order to improve grinding efficiency and achieve low-power operation, this paper presents the design of main drive gear. Under the premise of ensuring the gear strength, using a large teeth and a small modulus extend the life of the big gear, reduce costs to the optimal economic benefit. Gear layouts with optimization method and the design of the drive part meet the requirements of energy saving, high efficiency, low noise, safety and reliability, with certain application values.

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Zeng, Qing Dun, and Feng Zhe Tan. "Finite Element Analysis of Gear Contact on Two-Speed Transmission in Electric Cars." Applied Mechanics and Materials 341-342 (July 2013): 443–46. http://dx.doi.org/10.4028/www.scientific.net/amm.341-342.443.

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The main content of gear design is the strength design, and the contact strength design of gears is the main heart of the strength design, because the stress and deformation of gears directly affect their safety and service life and concern whether vehicle transmissions work smoothly. Therefore it is necessary to perform a finite element analysis for the gear contact in transmission. Based on the contact characteristic of helical gears, a three-dimensional solid model was established by using the software Pro/E, and the contact stress analysis of gears was carried out by the software ANSYS Workbench. The stress and strain distribution contours of helical gears were obtained, and then the check of shtrength and rigidity was performed. Thus, it is convenient for designers both to test the strength of gears and to modify the size of gears.

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Yousef, Samy, T. A. Osman, M. Khattab, Ahmed A. Bahr, and Ahmed M. Youssef. "A New Design of the Universal Test Rig to Measure the Wear Characterizations of Polymer Acetal Gears (Spur, Helical, Bevel, and Worm)." Advances in Tribology 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/926918.

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This work aims to study the wear characterization of common types of acetal polymer gears (spur, helical, bevel, and worm) using a new TS universal test rig, in order to obtain reliable results and as a reference when compared with acetal nanocomposite gears later. The TS universal test rig consists of three different units that are connected by a main driver shaft and a pair of constantly meshing metal spur gears, which transfer power to the bevel and worm test units. The first unit is used to test the bevel gears, the second unit is used to test the spur and helical gears, and the third unit is used to test the worm gears. The loading mechanism is similarly designed to block the brake mechanism. Hobbing and milling machines were used to machine an injection-moulded polymer flanges and produce the tested gears. All gear pairs, except the worm gear, have identical gear ratios. The experiments were performed at speed 1420 rpm and the torque was 4 Nm. The results showed that the wear rates (in the form of weight loss) of spur gears were consistent with the previous results and the other gear types had larger wear rates.

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Pilipenko, O., D. Kolesnik, and A. Berezniak. "TEETH AND GEAR WHEELS DESIGN DEVELOPMENT FOR AIRCRAFT REDUCTION TRAINS." Наукові праці Державного науково-дослідного інституту випробувань і сертифікації озброєння та військової техніки, no. 6 (December 30, 2020): 70–80. http://dx.doi.org/10.37701/dndivsovt.6.2020.08.

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The development of designs of teeth, gear wheels and gears, which have found application in gearboxes of aircraft and helicopters, is presented. Parameters of different types of initial generating circuits, their modifications and examples of application corresponding gear wheels in gearboxes of airplanes and helicopters are considered. The main attention is paid to GOST 13755-2015, developed by CIAMD (Central Institute of Aviation Motor Development) and having a number of advantages over the old GOST 13755-81. The main advantage is achieved by replacing the standard tooth head height with a standard tooth tip thickness. When the teeth work along the entire active part of the gearing line with a profile angle of 250, high contact and bending strength is provided, as well as resistance against galling of the surfaces of the teeth of highly stressed gears. A further increase in contact strength and resource is ensured by using the initial generating circuit with a profile angle of 280. Gear trains with a guaranteed overlap ratio of 2.0 have a vibration level five times lower and, in general, their bearing capacity is approximately 1.5 times higher than that of highly stressed reduction trains with an overlap ratio less than 2.0. The asymmetrical teeth parameters were chosen to increase the density of the transmitted power, as well as to reduce the dynamic loads and vibration of the gear wheels. The strength of gear trains according to GOST 13755-2015 significantly exceeds the strength of gear trains according to GOST 13755-81, but the most significant advantage (more than twice) is obtained in terms of noise level. The highest strength of gears with a main circuit angle of 330 occurs at a guide circuit angle of 20 °. The highest stiffness of arched teeth of all designs provides arched gear trains with high durability and load capacity, which makes it possible to design reduction trains with smaller weight and size specifications.

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Wei, Bo, and Xing Yi Su. "Simulation and Calculation: Improve Work Life of Bearing on Driving Gear of Main Reducer." Applied Mechanics and Materials 644-650 (September 2014): 128–33. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.128.

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The driving gear and driven gear in car rear axle have function of transmitting power. As important part of supporting driving gear, work life and situation of bearing have influence on power transmission. This paper improves system stiffness of gear and bearing, improves force situation of bearing by researching span between two bearings on driving gear. Work situation of main reducer can be improved through extending bearing life. The vibration and noise are reduced. Car market competition is improved.

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Tsolakis, Antonios D., Konstantinos I. Giannakopoulos, and Andreas S. Gkertsos. "Failure analysis of performance vehicle mechanical gear." MATEC Web of Conferences 188 (2018): 04019. http://dx.doi.org/10.1051/matecconf/201818804019.

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Gears are the main machine element in vehicle power transmission trains. In commercial vehicles, power transmission trains design complexity consists of the determination of the loading parameters which depends upon the working environment of the performance vehicle. In the present work a gear failure under dynamic loading is investigated. The failed gear is part of a 2 speed gearbox of a Rotax DD2 2-stroke Open- Wheel performance vehicle (go-cart type). The gearbox was in racing conditions when failure occurred. The vehicle was speeding in 2nd Gear at wide open throttle when instantaneously the driver by fault downshifted to 1st gear. The result was for the first gears break a whole piece and eventually the system to go out of operation. Chemical composition of the examined metallic components was determined via EDAX chemical analysis.

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Sivakumar, A., P. Sathia Morthi, A. Peer Mohamed Essac, S. Mohana Prasath, and M. Mukundhan. "Design and fabrication of wheel removing machine." YMER Digital 20, no. 12 (December 19, 2021): 412–15. http://dx.doi.org/10.37896/ymer20.12/38.

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The proposed system's basic premise is to reduce personnel during nut fitting and removing wheels from autos. The motor is at the heart of the project and its implementation. Motor, Nut fitting arrangement (multi nut remover), and spur gear arrangement are the components employed here for the efficient operation of separate blocks. The model's main goal is to remove all of a wheel's nuts at once, rather than one by one. The model's premise is to use a spur gear to transfer relative motion to other gears. The primary spur gear is connected to the motor shaft in the model, which rotates due to the motor. The primary gear is the driver, while the secondary gears are the driven. The major gear is located in the model's center. The secondary gears and the primary gear are in sync. To ensure precise meshing and tool spacing, the secondary gears are set at predetermined distances. The drive axle is equipped with primary gear. The cover has several auxiliary axles that extend through it. Each secondary axle has a first end that is positioned inside the housing and a second end that extends outwardly from the cover. One of the first ends is attached to each of several secondary gears. Each of the secondary gears is in contact with the primary gear. One of the secondary axles is connected to each of the couplers. The project and implementation must provide the motor with both positive and negative potential. If we press the corresponding switch for forwarding rotation, the nut will be fixed; if we press the corresponding switch for reverse rotation, the polarity will be reversed, and the nut will be removed. The motor can be controlled according to the needs of the operator. To tighten or remove the nut, the operator should lift the model and place it in the proper location.

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Goldfarb, Veniamin, Evgenii Trubachev, and Natalya Barmina. "Innovations in design and production of spiroid gears in the XXI century." MATEC Web of Conferences 287 (2019): 01002. http://dx.doi.org/10.1051/matecconf/201928701002.

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The paper presents the review of directions of development of the theory and practice of spiroid gears for the past two decades within the scientific production complex of Kalashnikov ISTU that involves the scientific department “Institute of Mechanics” and the small innovative enterprise “Mechanic”. This en-terprise became de facto the tasksetter and main investor of scientific and practical developments that can be divided into mutually related developments of the theory of gearing and methods of gear design, develop-ment of new varieties and advancement of the known gears, development of competitive layouts of gear-boxes and development of efficient techniques of gear and gearbox production. Development of the theory of gearing focused on creation of computer-aided means of design (the main of them is the software system “SPDIAL+”) provides the profound investigation of the process of tooth interaction with account of errors, elastic and elastoplastic strains of teeth and other elements of the design, localization of multi-pair contact, application of new schemes of tooth generation, optimization gear design with due regard to gear adaptation to real operation conditions and limitations of design and manufacturing procedures. Development and ad-vancement of different types of gears, their design and manufacturing techniques were mainly motivated by their implementation in the specific and under-investigated application area – low-speed heavy-loaded drives for pipeline valves. The practical effect of the development is illustrated by examples.

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Chen, Qianjin, Shuiming Wang, Pengfei Li, Xinguang Li, Jianhua Liu, Dewu Hu, Zhigang Zhao, and Xiaoshuang Xiong. "Numerical Analysis of Meshing of Loaded Misaligned Straight Bevel Gear Drives of Automobile Differential." World Electric Vehicle Journal 13, no. 2 (February 17, 2022): 41. http://dx.doi.org/10.3390/wevj13020041.

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The main purpose of this paper is to analyze the influence of different types of alignment errors on the meshing performance of loaded straight bevel gears. Based on 3D finite element models of the specific loaded assembling straight bevel gear pair, the contact area, transmission error, vibration and noise for the specific loaded straight bevel gear are investigated. The results show that the alignment errors have different degrees of adverse effects on the contact area and the contact line of the straight bevel gear pair, which can affect the transmission error, vibration, and noise of the straight bevel gear drives. The results also demonstrate that the most dangerous type of combined alignment errors is ΔP, ΔG, ΔE < 0 and Δγ. The results of this research can provide theoretical guidelines for the assembly and modification of straight bevel gears.

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Sun, Ying Shi, Tian Min Guan, and Run Ze Liu. "Action Simulation between Pin Sleeves of Output Mechanism and Cycloid Gear of Three-Gear Reducer." Applied Mechanics and Materials 66-68 (July 2011): 1988–92. http://dx.doi.org/10.4028/www.scientific.net/amm.66-68.1988.

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In this paper, the new driving structure of three cycloid gears at eccentric angle of 120 with one another is adopted so as to get rid of the weakness for the bearing of rotating arm. Thus, under the condition of that the basic dimension is not changed, by conducting optimization of profile modification and parameters optimization on traditional structure, the axial dimension is increased by width of one cycloid gear transmitting torque is increased about 40%, and the goal of large capacity with small size is realized. Three main forces are stressed upon the cycloid gear in actual work: the meshing force between gear and cycloid gear, the force upon the cycloid gear by the pin of output mechanism and the force upon the cycloid gear by the bearing of rotating arm. The paper mainly aims to work out the force upon the cycloid gear by the pin of output mechanism.

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Morimoto, Yuta, Toshiki Hirogaki, Eiichi Aoyama, and Yasuhiro Uenishi. "Precise and High Response Measuring Method of Meshing Force of Planetary Gear Mechanism." Key Engineering Materials 516 (June 2012): 469–74. http://dx.doi.org/10.4028/www.scientific.net/kem.516.469.

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Recently, technology for electric vehicles (EV) and hybrid vehicles (HEV) has been focused on by the automotive industry to address environmental problems including CO2 reduction [. In particular, in HEV, planetary gears are used to control differential rotation of the motor, engine and generator. For these vehicles, the noise level inside the vehicle is low because the motor is used as the main power source. As a result, further decrease of gear noise is desired compared with the conventional planetary gear mechanism. However, research into the gear noise of the planetary gear mechanism is extremely scarce. Therefore, in this study, we focus on the three axes of I/O rotation, and a new method of measuring the meshing force of the planetary gear mechanism. In this report, a gear-driving device, which is able to make 3-axis differential rotation, was designed for experimentation.

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Kumar, Ashwani, and Pravin P. Patil. "FEA Simulation Based Performance Study of Multi Speed Transmission Gearbox." International Journal of Manufacturing, Materials, and Mechanical Engineering 6, no. 1 (January 2016): 51–61. http://dx.doi.org/10.4018/ijmmme.2016010103.

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The main objective of this research work is to investigate the performance of automobile transmission gearbox under the influence of thermal properties variation of gearbox lubricant. An assumption has been made that the air-gear oil mist within transmission is under steady state condition, in isothermal equilibrium with the transmission gear oil bath of lubricant. The lubrication in multi speed transmission is subjected to thermo-elastohydrodynamic lubrication. The study here analyzed transmission in second gear pair. In full torque loading condition the high temperature generated due to meshing action of gears and frictional conditions between the transmission gear train changes the thermo-physical property of gear oil. The overall vehicle transmission gearbox performance is governed by the gear oil properties and it also effects the fuel consumption. This research study was performed at two higher different temperature range of gear oil.The analysis result shows that the gearbox oil thermal properties directly effect the performance and life span of automobile transmission gearbox.

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Tsiafis, Ioannis, Polychronia Mamouri, and Kyriakos Kyriakidis. "Design of a spiral bevel gear acc. to ISO 23509:2006 standards." MATEC Web of Conferences 318 (2020): 01020. http://dx.doi.org/10.1051/matecconf/202031801020.

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When the transmitting of power and torque between parts of a machine requires high efficiency, the most appropriate type of gears are the bevel gears. The two main forms of bevel gears are straight and spiral bevel gears. Manufacturing of bevel gears has been implemented using dedicated bevel gear cutting machines. These machines make the production of this type of gears quite costly. This is the main reason that forced many manufacturers start using CNC milling machines for cutting bevel gears. A combination of a 5-axis milling center machine and a modern computer aided manufacturing (CAM) system that supports a vast number of complicated machining procedures, offers the opportunity of machining high quality bevel gears. This paper concerns the presentation of a program written in MATLAB that calculates the basic designing features of a bevel gear pair, as they described by ISO standard. It is also presented the calculated tooth profiling that is used in order to be designed a 3-D model of the gears in a CAD software.

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Liu, Geng, Shan Chang, Li Yan Wu, and Ying Sheng Li. "Analysis System of Marine Planetary Gear Trains." Applied Mechanics and Materials 86 (August 2011): 55–58. http://dx.doi.org/10.4028/www.scientific.net/amm.86.55.

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Planetary gear train (PGT) with herringbone gears is one of typical transmission styles used in marine power transmission. How to effectively design a PGT with lighter structures and lower vibration and noise is a fatal task for heavily loaded marine gearing. An analysis system which was developed in the past decades is introduced in this paper to simulate the performance of planetary herringbone gear trains. The effects of main crucial parameters on the static and dynamic characteristics of planetary herringbone gear trains are studied by using the analysis system. The results are discussed and show that the presented system is effective and can be used in design of planetary herringbone gear trains.

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Li, Zheng, and K. Mao. "The Tooth Profile Modification in Gear Manufacture." Applied Mechanics and Materials 10-12 (December 2007): 317–21. http://dx.doi.org/10.4028/www.scientific.net/amm.10-12.317.

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The gear design always be focus on analyzing the static performance (strength, stress, friction) and dynamic performance (inertia, noise, vibration), and especially for dynamic, the noise and vibration of gear are big problems. Actually, the main reason of noise and vibration is transmission error between master and slave gears, but the error must exist in any manufacture process. To decrease harmful noise and vibration, the most effective method is “tooth profile modification”, which is by tip relief or root relief for modifying geometry profile of gear tooth to regulate transmission error. In the paper, the transmission error of original model and modified model will be compared to show the gear profile modification will influence the transmission error obviously.

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41

Abe, Tatsuro, and Keigo Fukunaga. "Gear Precision and Cutting Force in Dry Hobbing Gear Cutting for Gears Made of Brass Material." Key Engineering Materials 447-448 (September 2010): 297–300. http://dx.doi.org/10.4028/www.scientific.net/kem.447-448.297.

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Gear precision measurement was carried out for gear with tooth number z=17, gear module mn=0.5, tooth width b=10mm, spur gear design and made using JIS C 3604 brass material. Cutting force measurement was carried out for gear with z=30, mn=1.75, spur gear, and JIS C 3604 brass material. Main results are as follows: (1) Gear precision and cutting force was almost the same in both dry and wet cutting. (2) Process capability index Cp of tooth profile errors were almost the same in both dry and wet hobbing gear cutting, and 5.9 to 8.1. Cp of tooth lead errors was 5.8 to 10.7. It was concluded that dry hobbing gear cutting of brass material has a sufficient production capacity. (3) Almost the same gear precision in both dry and wet hobbing gear cutting was considered because cutting forces were also same.

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42

Ning, Taiyu, Chao He, Jifei Chen, Xueyuan Liu, Wengang Chen, Shuheng Wang, and Jie Tang. "Design and optimization of main reducer based on Baja racing." E3S Web of Conferences 260 (2021): 03015. http://dx.doi.org/10.1051/e3sconf/202126003015.

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The main reducer is the main component of the whole vehicle, and its main function is to realize deceleration and torque increase. For Baha racing car, in order to improve the dynamic performance of the whole car, the main reducer is designed from the aspects of layout, transmission ratio distribution, shift mode, overall size and shell structure. Calculate the transmission ratio range of reducer according to the performance parameters of transmission parts, and verify the rationality of transmission ratio; Then determine the parameters of gear according to the transmission ratio and related parameters, and finally design the parameters of gear according to the transmission ratio and related parameters, and finally design the parameters of other parts of reducer. Based on the determined parameters, 3D modeling software UG is used to build 3D models of various parts of the reducer, and finite element analysis software ANSYS is used to simulate and analyze the parts to check whether the comprehensive mechanical properties meet the requirements. In this paper, the design of the main reducer realizes the comprehensive design of small size, light weight, reasonable transmission ratio distribution, high reliability, shifting gears during driving, and the comprehensive mechanical properties also meet the requirements.

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Chuban, Vitalii Dmitrievich. "SHIMMY ANALYSIS OF LIGHT AIRPLANE MAIN LANDING GEAR." TsAGI Science Journal 48, no. 7 (2017): 665–72. http://dx.doi.org/10.1615/tsagiscij.2018026284.

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Meng, Li Li, Chun Guang Lu, Xiao Yan Xi, and Hui Zhen Zhao. "Application of Six Sigma Method in Improving the Quality of the Spiral Bevel Gear." Advanced Materials Research 295-297 (July 2011): 2655–60. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.2655.

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According to the quality problems in one gear enterprise, the DMAIC method which is the core application of the six sigma theory is used to improve the quality of the spiral bevel gear, and the quality data is analyzed by using Minitab software. Firstly, the quality problem is defined in accordance with the DMAIC procedures and the main reasons for quality problems in spiral bevel gears are determined. Secondly, measurement systems and process capability are analyzed. Then, we set a specific program for the improvements for the main causes of quality problems. Through the successful implementation of this project, the quality of spiral bevel gears is greatly improved, and the production cost is greatly reduced. The effect is very significant.

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Manda, Premkumar, A. Sambasiva Rao, Satyapal Singh, and A. K. Singh. "Failure Analysis of Cooler Fan Drive Gear System of Main Gear Box of Helicopter." Materials Today: Proceedings 5, no. 9 (2018): 17737–45. http://dx.doi.org/10.1016/j.matpr.2018.06.097.

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Yin, Qiaozhi, Jason Zheng Jiang, Simon A. Neild, and Hong Nie. "Investigation of gear walk suppression while maintaining braking performance in a main landing gear." Aerospace Science and Technology 91 (August 2019): 122–35. http://dx.doi.org/10.1016/j.ast.2019.05.026.

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NICOLIN, Ilie, and Bogdan Adrian NICOLIN. "Research on the nose landing gear of a military training aircraft." INCAS BULLETIN 12, no. 4 (December 4, 2020): 249–59. http://dx.doi.org/10.13111/2066-8201.2020.12.4.23.

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This paper presents the analysis of the landing gear configurations and the proposal of a solution for a military training aircraft. The paper presents both landing gears: nose and main because they are inextricably linked. The nose landing gear of military aircraft is a complex system composed of structural elements, electric and hydraulic components, energy absorption components, aircraft tire wheels etc., which is dimensioned according to the weight of the aircraft. Additional components attached to the nose landing gear include a landing gear extension and retraction mechanism and a steering system. The landing gear must withstand the weight of the aircraft in all phases of take-off (maximum weight: fuel, armament, ammunition, other equipment, flight crew etc.) and landing (impact from landing and a lower weight after completing the mission due to fuel consumption and ammunition use).

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Zhang, Cheng, Guo Xing Liang, Ming Lv, and Shi Ying Wang. "The Theoretical Analysis and Experimental Study on the Distribution Characteristics of Motion Parameters in the Process of Honing Gear." Key Engineering Materials 620 (August 2014): 225–33. http://dx.doi.org/10.4028/www.scientific.net/kem.620.225.

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Gear honing processing is a kind of processing method which belongs to the point-contact generating gear finishing. Its movement form is equivalent to a pair of gears transmission which the surface of the gear-honing-tool is adhered a layer of grinding grain. When it works in rolling processing, the contact-point between the workpiece and gear-honing-tool is moving. Then the moving point becomes a line in the space, and with the gear-honing-tool being in axial play, a standard flank of tooth is finished. Using the gear meshing principle, kinematics model of relative sliding velocity in the contact-point between the workpiece and tools is established, based on which the contact-line equation. and acceleration equation. at the contact-point are derived. The contact-line is solved in a given parameters of the workpiece and tool in MATLAB. The theoretical derivation and experimental results show that the speed in diverse along the direction of the tooth depth is the main reason for the roughness value and surface texture of workpiece. The acceleration of contact-line at the tooth flank is different, and it is leading reason that the processed workpiece gears appear profile distortion. Finally, the testing system is established for researching honing gear process. It is showed in the results that the acceleration difference can lead to the CBN abrasive falling away from gear honing tool, and even the "anti-cutting" phenomenon.

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Ishin, N. N., A. M. Goman, A. S. Skorokhodov, M. K. Naturjeva, and Yu A. Dakalo. "METHOD FOR ESTIMATING THE RESIDUAL LIFE OF GEARS IN THE INTER-REPAIR PERIOD." Mechanics of Machines, Mechanisms and Materials 2, no. 55 (June 2021): 5–17. http://dx.doi.org/10.46864/1995-0470-2021-2-55-5-17.

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The aim of the work is to create a computational and experimental method for the operational evaluation of the residual life of spur gears of technically complex products in the inter-repair period by conducting periodic vibration control. The proposed method is based on the main provisions of the theory of vibration-pulse diagnostics of gears developed in the Joint Institute of Mechanical Engineering of the National Academy of Sciences of Belarus. At the same time, the current value of the KV coefficient, which takes into account the internal dynamic load in the engagement of each gear, and its change during operation is determined based on the analysis of the time realizations of vibration accelerations. The main operation capacity criteria are the contact and bending strength of the teeth. An example of estimating the residual life of a gear pair is given that limits the reliability of a double-row planetary gear motor-wheel of a heavy-duty dump truck. The proposed method makes it possible at any stage of operation of a gear mechanism to assess the residual life of its gears, identify its most “weak” links, determine the probability of failure of the object, minimize the risk of accidents, optimize maintenance schedules, increase the inter-repair time. Thus, it is possible to organize highly effective monitoring of the reliability-limiting components of the technically complex products during operation and transition from planned preventive maintenance of machines to maintenance according to the actual condition.

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Xu, Jin Li, and Ting Yan. "Effect of Gear Installation Flatness in Main Reducer on Gear Mesh Vibration Based on Adams Simulation." Applied Mechanics and Materials 620 (August 2014): 262–67. http://dx.doi.org/10.4028/www.scientific.net/amm.620.262.

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This paper takes spiral bevel gear installation planes of a main reducer in a rear axle of a certain car as the research object, using ug to establish three-dimensional model of the main reducer assembly, applies adams simulation and the quantitative and qualitative method to analyze the effect law of the spiral bevel gear installation flatness error on gear mesh vibration, obtains the reasonable area of gear installation flatness error , it provides the reference for parameter design and installation of the spiral bevel gear in the main reducer.

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Journal articles on the topic 'Main gear'

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