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Готові списки джерел за темами / Hydraulic volume mechanical transmission / Статті в журналах

Щоб переглянути інші типи публікацій з цієї теми, перейдіть за посиланням: Hydraulic volume mechanical transmission.

Статті в журналах з теми "Hydraulic volume mechanical transmission"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 липня 2025

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1

Trembach, Oleksiy, and Andrii Kozhushko. "DEVELOPMENT A MODEL FOR THE DETERMINATION THE LOSS COEFFICIENTS OF VOLUME AXIAL PISTON HYDRAULIC DRIVES." Bulletin of the National Technical University «KhPI». Series: Automobile and Tractor Construction, no. 2 (November 28, 2024): 137–49. http://dx.doi.org/10.20998/2078-6840.2024.2.15.

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Анотація:

In recent decades, agricultural vehicles equipped with a power transmission unit consisting of a hydraulic drive have become widely used. Thus, in agricultural tractors, the hydraulic drive implements one of the energy flows in the hydraulic-mechanical transmission. Axial-piston hydraulic machines, which can be controlled or uncontrolled, are introduced in such means. During the operation of agricultural tractors with hydraulic-mechanical transmissions, a wide range of dynamic loads is applied to the hydraulic transmission, which causes the appearance of jump-like values of torque and angular

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2

Avrunin, Grygoriy, Mikhail Podrigalo, Nadia Podrigalo, Irina Moroz, and Anatoly Potoroka. "Analysing the possibility of using a hydraulic transmission with motor wheels for the nomad at off-roader." Automobile transport, no. 54 (August 8, 2024): 15–24. http://dx.doi.org/10.30977/at.2219-8342.2024.54.0.02.

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Problem. The creation of transport vehicles for operation in difficult road conditions requires solving a complex of problems related to the fulfilment of the necessary requirements for speed and traction characteristics, in particular, shifting modes, overcoming climbs, manoeuvrability and increased speed with its stepless change, anti-skid properties. Such requirements are achieved thanks to constructive solutions in transmissions of various types. Goal. The aim is an attempt to create a full-flow continuously variable transmission with hydrostatic transmission and motor-wheels instead of a

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3

Han, Ying. "Study on Hydraulic System for Full Hybrid Transmission." Applied Mechanics and Materials 607 (July 2014): 495–99. http://dx.doi.org/10.4028/www.scientific.net/amm.607.495.

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Design method of hydraulic system of full hybrid transmission was analyzed. At first, oil volume flow and pressure requirement was confirmed according to the vehicle control strategy. Mechanical gear pump and electric pump were used to supply oil flow for all driving modes. Self-adapted pressure regulation circuit was designed to supply high pressure oil for brake engagement. Structure dimension of valves and cooling orifices was designed by theoretical calculation. Cooling flow can be distributed proportionally among electric motors and planetary gears.

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4

Avrunin, Grygoriy, Mikhail Podrigalo, Nadiya Podryhalo, and Irina Moroz. "ANALYSIS OF TESTING METHODS FOR VOLUME HYDRAULIC MACHINES AND HYDRAULIC TRANSMISSIONS." Bulletin of the National Technical University "KhPI". Series: Hydraulic machines and hydraulic units, no. 2 (March 6, 2025): 25–33. https://doi.org/10.20998/2411-3441.2024.2.04.

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Purpose. Creation of recommendations for the use of testing methods for volumetric hydraulic machines and hydraulic drives for domestic specialists in the field of mechanical engineering of hydronic vehicles and technological equipment, as well as in the education of students. Research methodology. Analysis of modern hydraulic schematic diagrams and testing methods for volumetric hydraulic machines and hydraulic drives to solve the problems of diagnosing the technical condition, determining volumetric and hydromechanical power losses and resource tests based on accumulated domestic and foreign

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5

Karmel, A. M. "Design and Analysis of a Transmission Hydraulic System for an Engine-Flywheel Hybrid-Vehicle." Journal of Dynamic Systems, Measurement, and Control 112, no. 2 (1990): 253–60. http://dx.doi.org/10.1115/1.2896133.

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Unlike hydraulic systems of conventional automotive transmissions, the hydraulic system of a hybrid vehicle must cope with large variations of pressure as well as flow. If supplied by traditional pump configurations, either fixed or variable displacement, the system will incur substantial efficiency losses. This paper presents a feasibility study of a dual-pump hydraulic supply system which consists of a low-volume fixed-displacement pump and a high-volume variable-displacement pump. The analysis addresses the dynamic characteristics of this system along with its sensitive design areas.

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6

КОРОТИЧ, ОЛЬГА, ВІТАЛІЙ НЕЙМАК, ЕЛЛА ЗОЛОТЕНКО, ВАДИМ СУХОСТАВСЬКИЙ та ЮРІЙ МИХАЙЛОВСЬКИЙ. "РОЗРОБКА І ДОСЛІДЖЕННЯ БАГАТОПОЗИЦІЙНОГО ГІДРОАПАРАТУ ТЕХНОЛОГІЧНОЇ МАШИНИ". Herald of Khmelnytskyi National University. Technical sciences 337, № 3(2) (2024): 11–15. http://dx.doi.org/10.31891/2307-5732-2024-337-3-1.

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According to the analysis of the designs of technological machines that have several executive mechanisms that work sequentially according to the technological diagrams and receive movements from the electric drive through chains of mechanical transmission mechanisms consisting of a set of kinematically connected friction pairs and parts, complicated in the design and its production, have reduced reliability in operation. The authors propose a developed hydraulic system for distributing motion to the working mechanisms of the technological machine, which consists of an original design of a mul

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7

Egwuagu, M. Onyekachi, B. Uchenna Ugwuanyi, and T. Okechukwu Onah. "Mechanistic Modeling of Hydraulic Energy Transmission Technology of an Improved Dental Patient Chair Design." Engineering and Technology Journal 9, no. 04 (2024): 3857–62. https://doi.org/10.5281/zenodo.11092493.

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This work focused on mechanistic modeling of hydraulic technology of an improved dental chair design. ISO 6385 standard for P<sub>(M)</sub>95 patient were basis for system parameters, and fathom masses between 60kg-93kg, corresponding to DINED 2003 mass of patients, produced total load on the pantograph. The force exerted by the lower limb of the dentist is an ergonomic stressor that was experimentally   studied using Pascal’s law of the hydraulic system. Methodology adopted was mechanistic modeling technique. The results indicated that pedal force of   0.1375kN eleva

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8

Song, Jin Chun, Guan Gan Ren, and Lin Yang. "Design and Simulation of an Energy-Saving Hydraulic Oil Production System." Advanced Materials Research 619 (December 2012): 498–502. http://dx.doi.org/10.4028/www.scientific.net/amr.619.498.

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The study on an advanced equipment of a new pumping unit is presented to satisfy the mining technology demands of large load, long stroke and low pumping speed during petroleum exploitation process. The method of using a full hydraulic system drive rather than the traditional way is adopted to overcome the disadvantages in a traditional oil production equipment such as complex mechanical structure, large volume,many transmissions, low efficiency and high manufacturing cost. In addition, the hydraulic circuit which is made up of an accumulator, a hydraulic motor and two hydraulic pumps is used

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9

Yang, Mingkun, Gexin Chen, Jianxin Lu, et al. "Research on Energy Transmission Mechanism of the Electro-Hydraulic Servo Pump Control System." Energies 14, no. 16 (2021): 4869. http://dx.doi.org/10.3390/en14164869.

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The electro-hydraulic servo pump control system (EHSPCS) is a volume control system that uses a permanent magnet synchronous motor (PMSM) with a fixed displacement pump to directly drive and control the hydraulic cylinder. The energy transmission law of the system is very complicated due to the transformation of electrical, mechanical and hydraulic energy as well as other energy fields, and qualitative analysis of the energy transfer efficiency is difficult. Energy transfer analysis of the EHSPCS under different working conditions and loads is proposed in this paper. First, the energy flow tra

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10

Lou, Xi Yin. "Study on Walking System Technology of Crawler Combine Harvester." Advanced Materials Research 1037 (October 2014): 107–10. http://dx.doi.org/10.4028/www.scientific.net/amr.1037.107.

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Crawler combine harvester walking system is various transmission technology are organic and reasonable matching, foster strengths and circumvent weaknesses, complementary drive system so as to achieve the best overall. Stepless speed walking is particularly suitable for complex condition changes, the demand of drive system for a more comprehensive, more comprehensive, objective stepless speed walking in transmission system innovation or seek better performance, and as a mechanical transmission device of the planetary gear has the advantages of small volume transfer large torque, high efficienc

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11

Gabrinets, V. A. "Use of a hydraulic brake as a source of thermal energy for the railway rolling stock." Science and Transport Progress, no. 42 (December 25, 2012): 40–44. http://dx.doi.org/10.15802/stp2012/9268.

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Introduction: In this paper the braking issues of passenger trains which have a great speed and frequent stops are examines. Problem statement: These processes are ехpensive and have big energy losses. The proposed solution to the problem: The kinetic energy of braking prosses propose to turn into thermal energy of heating fluid. For this purpose special hydraulic brake is proposed. The brake is connected with the wheel carriage pairs. The process is based on the energy dissipation in liqid when the disks with spikes rotate in it. Because the real liquid has friction and viscosity, it will be

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12

Bagarello, Vincenzo, Gaetano Caltabellotta, and Massimo Iovino. "Water transmission properties of a sandy-loam soil estimated with Beerkan runs differing by the infiltration time criterion." Journal of Hydrology and Hydromechanics 69, no. 2 (2021): 151–60. http://dx.doi.org/10.2478/johh-2021-0010.

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Abstract The Beerkan method consists of a ponded infiltration experiment from a single ring inserted a small depth into the soil. Fixed, small volumes of water are repeatedly poured into the ring to maintain a quasi-zero head on the soil surface. According to the standard Beerkan infiltration run, a new water volume is poured on the infiltration surface when the previously applied volume has completely infiltrated and the soil surface is entirely exposed to air (ta criterion). However, water could also be applied when the soil exposition to air begins (to criterion) or half the soil surface is

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13

Jen, Y. M., and C. B. Lee. "Influence of an Accumulator on the Performance of a Hydrostatic Drive with Control of the Secondary Unit." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 207, no. 3 (1993): 173–84. http://dx.doi.org/10.1243/pime_proc_1993_207_336_02.

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In a secondary control unit system, an accumulator changes the relationship of the pumps and motor from flow coupling to pressure coupling. This change creates several benefits, including energy conservation, increased stability and the ability to change the rotational direction of the hydraulic motor. The accumulator therefore plays an important role because it dominates the overall performance of the secondary control unit system. This paper studies the influence of accumulator volume and precharge gas pressure on the performance of a hydrostatic transmission system in a secondary unit contr

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14

Guo, Meng, Cheng Liu, Qingdong Yan, Wei Wei, and Boo Cheong Khoo. "The Effect of Rotating Speeds on the Cavitation Characteristics in Hydraulic Torque Converter." Machines 10, no. 2 (2022): 80. http://dx.doi.org/10.3390/machines10020080.

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Анотація:

Hydraulic torque converter is a kind of high speed rotating machine using viscosity hydraulic oil as working medium, and its internal flow field is very complex. Thereby cavitation can occur easily in the working process, resulting in severe degradation of torque converter performance, noise, vibration and even failure. In order to reveal the effect of rotating speeds on the cavitation characteristics, a full flow passage geometry and a computational fluid dynamics (CFD) model with cavitation were developed to analyze the flow behavior in the torque converter. The results show that cavitation

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15

RYNKEVICH, S. "CONTROL OF MECHANICAL AND HYDROMECHANICAL GEARS MOBILE AND TECHNOLOGICAL MACHINES." Herald of Polotsk State University. Series B. Industry. Applied Sciences, no. 1 (February 27, 2025): 13–19. https://doi.org/10.52928/2070-1616-2025-51-1-13-19.

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The issues related to the control and monitoring of mechanical and hydromechanical gears, which are equipped with many mobile and technological machines, are considered. The factors that affect the performance of gears of those and other transmissions are analyzed. It is noted that the concentration of the load along the length of the contact lines of the gears occurs due to errors in the location of the teeth, elastic deformations of the teeth, shafts and their supports. Using the method of finite elements implemented in the finite element analysis program, the indicators used in assessing th

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16

Liu, Hua, Ghaith Arfaoui, Milos Stanic, et al. "Numerical modelling of oil distribution and churning gear power losses of gearboxes by smoothed particle hydrodynamics." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 233, no. 1 (2018): 74–86. http://dx.doi.org/10.1177/1350650118760626.

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Sufficient oil supply of all machine elements in gearboxes is usually required to avoid damage during operation. Quite frequently, transmissions are conservatively designed with an oversupply of oil to guarantee operational reliability. An oversupply of oil results in an unnecessarily high amount of oil being kept in motion, which in turn leads to excessive hydraulic gear power losses. In high-speed gearboxes in particular, churning losses can contribute greatly to the total power losses. Further detailed information on the oil distribution in gearboxes is needed in order to increase the effic

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17

Huang, Chung Neng, Kuo Han Chen, and David T. W. Lin. "Development of an Novel Adaptive Suspension System Based on Ball-Screw Mechanism." Applied Mechanics and Materials 477-478 (December 2013): 128–31. http://dx.doi.org/10.4028/www.scientific.net/amm.477-478.128.

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For the passive and semi-active suspensions are characterized as with constant parameters which cannot cope with time-variant road conditions, the suspension results are difficult to be satisfied. Although, the active ones are better than previous two on suspension performance, until now which are still far from real application for the drawbacks of complicated structure, large volume, costly, and difficult maintenance. Here, Ball Screw (BS) is with the characteristics of smaller volume, precise positioning, and well handling high-speed forward and backward transmissions. Instead of hydraulic

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18

Liu, Hongtuo, Fangwei Xie, Kai Zhang, et al. "Effect of air chamber and oil properties on damping characteristics of single-tube pneumatic shock absorber." International Journal of Structural Integrity 9, no. 1 (2018): 27–37. http://dx.doi.org/10.1108/ijsi-03-2017-0017.

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Purpose The shock absorber is an important component of vehicle suspension that attenuates the vehicle vibration. Its running state directly affects the performance of the vehicle suspension. The purpose of this paper is to quantitatively study the relationship between damping characteristics and air chamber and oil properties in single-tube pneumatic shock absorber. Design/methodology/approach Combined with the principle of fluid dynamics and hydraulic transmission technology, the rebound stroke and compression stroke mathematical models, and damping characteristics simulation model are estab

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19

Melyantsov, P. T., O. M. Losikov, and V. K. Sidorenko. "ANALYTICAL SUBSTANTIATION OF THE STRUCTURAL PARAMETERS OF THE TECHNICAL CONDITION OF THE FIVE-PLUNGER SUPPORT OF AXIAL-PISTON HYDRAULIC MACHINES." Modern Problems of Metalurgy, no. 27 (May 24, 2024): 73–87. https://doi.org/10.34185/1991-7848.2024.01.06.

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Анотація:

The purpose of the work was to provide an analytical justification of the structural parameters of the technical condition of the annular support of the five plungers, which could be used to evaluate the further use of the plunger pair in the technological process of repairing the axial-piston hydraulic unit. To achieve it, the first step is to analyze the operating conditions of the fifth plunger of the pumping unit of the hydraulic machine, which is a hydrostatic bearing, which allows to reduce mechanical losses in friction pairs at the expense of some increase in volumetric losses provided

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20

Kamandar, Mohammad Reza. "The Selection, Designing and Analysis of Heavy Duty Tractor Gearbox (ITM8200)." Applied Mechanics and Materials 110-116 (October 2011): 2948–57. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.2948.

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Анотація:

In recent years, ITM 399 series tractor has been manufactured in Iran Tractor Manufacturing Company (ITM), which can be suitable for small farms operations. For big farms operations, minimizing energy consumption, decreasing the time losses and increasing work efficiency, a heavy duty tractor of ITM 8200 series was started to design in the same Company. The gearbox selection, design and analysis for this tractor with the engine power of 154 horse power is studied in this research. The mechanical gearbox equipped with mechanical-hydraulic dynashift system was used in ITM 8200 power transmission

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21

Kohles, Sean S., and Julie B. Roberts. "Linear Poroelastic Cancellous Bone Anisotropy: Trabecular Solid Elastic and Fluid Transport Properties." Journal of Biomechanical Engineering 124, no. 5 (2002): 521–26. http://dx.doi.org/10.1115/1.1503374.

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The mechanical performance of cancellous bone is characterized using experiments which apply linear poroelasticity theory. It is hypothesized that the anisotropic organization of the solid and pore volumes of cancellous bone can be physically characterized separately (no deformable boundary interactive effects) within the same bone sample. Due to its spongy construction, the in vivo mechanical function of cancellous or trabecular bone is dependent upon fluid and solid materials which may interact in a hydraulic, convective fashion during functional loading. This project provides insight into t

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22

Yin, Xinqiao. "Design and Control Strategies for Mechanical Hydraulic Transmission Systems." Academic Journal of Science and Technology 6, no. 3 (2023): 47–49. http://dx.doi.org/10.54097/ajst.v6i3.10170.

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Анотація:

With the development of social and economic development, all walks of life are progressing rapidly, and mechanical hydraulic transmission technology has been widely used. Mechanical hydraulic transmission technology is a widely used, high efficiency, energy-saving and environmentally friendly transmission technology, mainly using liquid as the medium, relying on the pressure of the liquid to transmit power. Due to the strong mobility of the liquid, the pressure and flow of the liquid can be changed at will, therefore, it is widely used in mechanical hydraulic transmission systems. This paper t

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23

Diachenko, Oleksandr, Dmytro Gapon, Ihor Karpaliuk, and Tetiana Donetska. "ANALYSIS OF THE STATE AND PROBLEMS OF ELECTRICITY DEVELOPMENT IN UKRAINE." Bulletin of the National Technical University "KhPI". Series: Hydraulic machines and hydraulic units, no. 1 (November 29, 2024): 83–87. https://doi.org/10.20998/2411-3441.2024.1.12.

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Today, the unified electric power system of Ukraine operates in extremely difficult conditions. The conditions of armed aggression create extremely difficult challenges, under which it is impossible to ensure the reliable and safe operation of the energy system. The most promising and significant factor in the transformation of the unified electric power system of Ukraine, which can improve the sustainability of its functioning, for now, is the fastest possible introduction of power stations and distributed generation with non-guaranteed power that uses renewable energy sources. The peculiarit

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24

Lyu, Chang, Zhao Yanqing, and Lyu Meng. "Loader power-split transmission system based on a planetary gear set." Advances in Mechanical Engineering 10, no. 1 (2018): 168781401774773. http://dx.doi.org/10.1177/1687814017747735.

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In hydraulic mechanical transmission loaders, a hydraulic torque converter can prevent an engine from stalling due to overloading of the loader during the spading process; however, the hydraulic torque converter also reduces the loader’s fuel economy because of its low transmission efficiency. To address this issue, the study designs an output-power-split transmission system that is applied to a hybrid loader. The designed transmission system removes the hydraulic torque converter in the power transmission system of a traditional loader and adopts a planetary gear set with a compact structure

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25

Lou, Xi Yin. "Design of Walking Stepless Speed System for Caterpillar Feeding Combined Harvester." Applied Mechanics and Materials 697 (November 2014): 194–97. http://dx.doi.org/10.4028/www.scientific.net/amm.697.194.

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Hydro mechanical stepless speed system is a new conbination system of hydraulic transmission and mechanical transmission, which realizes the stepless speed change through the hydraulic transmission and the mechanical transmission to reduce the speed and torque, and to improve transmission efficiency; through optimizing design, The system can realize the differential steering, increase ground clearance. In this paper, the caterpillar feeding combined harvester is the object, the system is composed by the motor, a variable pump single stage planetary gear, hydraulic machinery stepless speed walk

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26

Samorodov, Vadym, Grigorii Avrunin, and Dmitrii Harmash. "ANALYSIS OF UNIVERSAL CHARACTERISTICS OF HYDRAULIC FLUID POWER TRANSMISSIONS OPERATING IN A COMPOSITION OF HYDRAULIC-MECHANICAL TRANSMISSIONS FOR DIFFERENT WORKING VOLUMES OF HYDRAULIC MACHINES OF AXIAL PISTON TYPE." Bulletin of the National Technical University «KhPI». Series: Automobile and Tractor Construction, no. 2 (December 3, 2020): 11–18. http://dx.doi.org/10.20998/2078-6840.2020.2.02.

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27

Wang, Huan, Dongye Sun, and Datong Qin. "A new continuously variable transmission system applied to transmission system of the roadheader's cutting unit." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 231, no. 19 (2016): 3590–600. http://dx.doi.org/10.1177/0954406216649404.

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For the existing roadheader, the transmission system of the cutting unit cannot regulate speed and the cutting motor may break down because of the impact vibration. In this study, the power reflux hydraulic transmission system, which is a new continuous variable transmission system, is put forward to ameliorate these problems. The basic characteristics such as the speed ratio, efficiency and torque ratio are analysed on the basis of expounding the basic structure and operational principle of the power reflux hydraulic transmission system. The dynamic model of the transmission system of the cut

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28

Avrunin, Grygoriy, Mikhail Podrigalo, Nadiya Podryhalo, and Irina Moroz. "STUDY OF LOADER TRANSMISSION DYNAMICS WITH HIGH TORQUE STEP-ADJUSTABLE HYDROMOTOR-WHEELS." Bulletin of the National Technical University "KhPI". Series: Hydraulic machines and hydraulic units, no. 1 (November 29, 2024): 28–37. https://doi.org/10.20998/2411-3441.2024.1.04.

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Анотація:

Goal. The purpose of the article is to analyze the dynamics of the hydraulic fluid power of the forklift transmission equipped with radial-piston high- torque multi-cycle hydraulic motors with a step change in working volume. Such a transmission is offered as a gearless one compared to the use of traditional transmissions with axial-piston hydraulic motors and gearboxes in front of the drive wheel hub. Research methodology. The traction-speed characteristic of a serial wheel loader is built taking into account the constant power of the drive internal combustion engine for rotation of the axial

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29

Ren, Xiao Li, Xue Mei Shang, Chen Fan, and Yan Ting Du. "A Design of Electric Hydraulic Lifting Device Supported by Mechanical Structure." Key Engineering Materials 621 (August 2014): 317–22. http://dx.doi.org/10.4028/www.scientific.net/kem.621.317.

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Анотація:

In hydraulic transmission, Hydraulic pressure can not support heavy objects long time. For the shortcoming, an electro-hydraulic lifting device is designed with mechanical structural supporting; Electric motor is the motive power. The weight is lifted by hydraulic transmission technology; the base of the device is set up a lifting rigid leg and pushing forward Casters .After hydraulic system lifting heavy objects, the lifting devices rely on the support tube, mechanical positioning tube and rigid supporting legs to lock the lifting position. In order to ensure the same high of support on diffe

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30

Wang, Haifei, Shimin Yang, and Tan Lu. "Mechanical transmission system of loader based on hydraulic hybrid technology." Thermal Science 25, no. 6 Part A (2021): 4233–40. http://dx.doi.org/10.2298/tsci2106233w.

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Анотація:

In order to solve the problems of high energy consumption, high noise and pollution gas emission existing in the mechanical transmission system of loader, a research on the mechanical transmission system of loader based on hydraulic hybrid technology is proposed. The mechanical energy and heat energy are generated by the mechanical operation of the loader, which are converted into hydraulic energy and output to the drive system. According to the fast response characteristics and high power density characteristics of the hydraulic power system relative to the thermal engine, the dynamic model o

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31

Sevda Agammadova, Adil Mehtili, Sevda Agammadova, Adil Mehtili. "APPLİCATİON OF THE WORKİNG FLUİD İN THE HYDRAULİC TRANSMİSSİON." PAHTEI-Procedings of Azerbaijan High Technical Educational Institutions 38, no. 03 (2024): 290–96. http://dx.doi.org/10.36962/pahtei38032024-290.

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Анотація:

Issues related to the determination of the steady-state temperature of the hydraulic systems of volume hydraulic devices for the stability of the output lane are of great importance. Therefore, it is necessary to know the time for the hydraulic system of the volume hydraulic actuator to reach a stable temperature regime. The transition mode is a complex function of a large number of variables, and at the same time it is necessary that it should be as short as possible, which will save both power consumption and idle operating time of the installation. First of all, the parameters that influenc

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32

Ion-Guta, Ion. "The Dynamic Behavior and Stability Analysis of an Electro-Hydro-Mechanical Adaptive Transmission." Applied Mechanics and Materials 760 (May 2015): 589–94. http://dx.doi.org/10.4028/www.scientific.net/amm.760.589.

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Анотація:

In the present paper is presented a numerical simulation of an electro-hydro-mechanical system of adaptive transmission of mechanical power. This system is based on a hydraulic circuit consists of a hydraulic pump with constant flow and a hydraulic motor with variable flow ordered so that the pressure in the circuit to remain constant. For a variation of the ramp and step signal sources of loads, are presented the main features of operation of adaptive transmission. Analysis of dynamic stability of mechanical transmission is made through the linear analysis with Bode diagrams. Simulation of tr

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33

Zhdanovich, Ch I. "Continuously Variable Two-Flow Hydrostatic-Mechanical Transmission of Crawler Tractor." Science & Technique 23, no. 3 (2024): 251–60. http://dx.doi.org/10.21122/2227-1031-2024-23-3-251-260.

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Анотація:

The paper proposes an original design of a continuously variable two-flow hydrostatic-mechanical transmission, which ensures division of the power flow along the sides of the crawler tractor. To ensure stability of rectilinear motion, their volumetric and mechanical efficiency, the maximum pressure of the working fluid in the hydraulic transmission, the maximum speed and torque on the shaft of the hydraulic motor. The parameters of an unregulated hydraulic motor, an adjust-table pump and mechanical transmission elements are selected. A mathematical model of the rectilinear motion of a caterpil

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34

Chen, Huajun, Meng Wang, Xiangdong Ni, et al. "Transmission Characteristics and Experiment of Hydraulic–Mechanical Transmission of Cotton Picker." Agriculture 14, no. 8 (2024): 1250. http://dx.doi.org/10.3390/agriculture14081250.

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Анотація:

To overcome the issue of unstable speed output encountered by cotton pickers operating in harsh environments and subject to frequent external load fluctuations, a hydraulic–mechanical transmission (HMT) for cotton pickers is proposed in this study. By analyzing the driving system of the cotton picker, a Lavira-based HMT scheme is developed. The matching characteristics of the HMT speed ratio are analyzed, a continuity and smoothness test of the speed ratio of the changing segment is carried out, and the influence law of smoothness of the HMT changing segment is discussed. The results show that

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35

Dai, Hanzheng, Lirong Wan, Qingliang Zeng, Zhenguo Lu, Zhiyuan Sun, and Wenting Liu. "Method and Test Bench for Hydro-Mechanical Continuously Variable Transmission Based on Multi-Level Test and Verification." Machines 9, no. 12 (2021): 358. http://dx.doi.org/10.3390/machines9120358.

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Анотація:

According to the structural characteristics of Hydro-mechanical continuously variable transmission (HMCVT), a multi-functional test bench was developed, and the basic structure, working principle, and test functions of the test bench were introduced. The test bench has the following characteristics: To analyze the impact of mechanical transmission and hydraulic transmission on the HMCVT transmission system, the performance can be tested separately by using a test bench; the coupling characteristics of the hydraulic transmission and mechanical transmission can also be tested; it can also test a

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36

Wang, Bin, Xin Yan Lin, Shi Heng Li, and Bin Zhang. "Research on a Hub Hydraulic Motor Driving System of Electric Vehicle." Advanced Materials Research 711 (June 2013): 482–85. http://dx.doi.org/10.4028/www.scientific.net/amr.711.482.

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Анотація:

This paper applies hydraulic transmissions advantages of small volume, light weight, quick response, stable transmission, great transmission torque and agile spatial arrangement etc. to hub electromotor drive electric vehicle, substitutes hub hydraulic motors for hub electromotors, propose a hub hydraulic motor driving system of electric vehicle. The constitution and working principle of system is then described in detail. The hub hydraulic motor driving system proposed in this paper will help electric vehicle to realize continuously variable transmission, leave out reducer and differential me

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37

Wang, Chengbin, Long Quan, and Hengan Ou. "The method of restraining hydraulic impact with active adjusting variable damping." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 11 (2018): 3785–94. http://dx.doi.org/10.1177/0954406218809740.

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Анотація:

Hydraulic impact is a common phenomenon in the hydraulic transmission system, which has great influence on the smooth operation of hydraulic transmission system and the service life of hydraulic components, especially to the hydraulic system with large inertia load. In order to restrain the hydraulic impact, the causes for hydraulic impact are analyzed, and a new method of active adjusting variable damping was developed. The principle of this method is to make use of the reserving signal to predict the timing of the hydraulic shock wave actively and adjust the opening size of the damped hole a

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38

Orekhov, A. A., S. V. Timokhin, I. A. Spitsyn та K. Z. Kuhmazov. "ОБЕСПЕЧЕНИЕ РАЦИОНАЛЬНОГО ТЕМПЕРАТУРНОГО РЕЖИМА КОРОБКИ ПЕРЕДАЧ АВТОМОБИЛЯ КАМАЗ СЕЛЬСКОХОЗЯЙСТВЕННОГО НАЗНАЧЕНИЯ". Niva Povolzh`ia, № 4(53) (22 листопада 2019): 134–40. http://dx.doi.org/10.36461/np.2019.52.3.020.

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Анотація:

В работе рассмотрены особенности эксплуатации автомобилей при низких температурах окружающего воздуха, а также существующие способы и средства тепловой подготовки их агрегатов. Если вопросы тепловой подготовки и поддержания рационального температурного режима двигателей внутреннего сгорания автомобилей в значительной степени решены, то для агрегатов их трансмиссий они требуют дальнейшего развития. Проанализировано применение тепловых аккумуляторов для тепловой подготовки агрегатов автомобилей. Предложен способ и система обеспечения рационального температурного режима коробки передач автомобиля

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39

Krumboldt, L. N., F. P. Golovashkin, and A. G. Strelkov. "Hydrostatic drive in transmissions of special self-propelled vehicles." Izvestiya MGTU MAMI 7, no. 1-1 (2013): 96–104. http://dx.doi.org/10.17816/2074-0530-68216.

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Анотація:

The authors analyzed the working principle of hydrostatic transmission with adjustable hydraulic machines. A method for determining the range of variation of the transmission ratio of the controlled hydraulic machines with power loss is presented as well. There are mechanical properties of hydrostatic transmission with adjustable hydraulic machines with sequential mode acceleration of its driven member. There is considered full flow transmission of a utility tractor "BIMA-300" (France), and its evaluation is given.

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40

Wang, An Lin, Bin Nan Yue, He Liu, Peng Ju Zhou, and Bang Fu Gong. "The System Model of the Bulldozer Machine Based on the Theory of Design Space Integration and its Experimental Verification." Advanced Materials Research 201-203 (February 2011): 1402–7. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.1402.

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Анотація:

Bulldozer transmission and control of physical energy involved in a variety of forms, many parts of local parameters for the overall performance of mutual coupling, and it is difficult to quantify. To solve the bulldozer engineering machinery represents more conditions, more energy state, and difficult to quantification, this paper integrated chassis, ground mechanics, mechanical, hydraulic, hydraulic transmission and other theories, the use of mechanical ,electronic and hydraulic integration design space thought, a hydraulic transmission system model bulldozer is established. For the dynamic

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41

Rutkevych, Volodymyr, and Serhiy Shargorodskiy. "STUDY OF THE BRAKING PROCESS OF A GRAIN HARVESTER USING VOLUME HYDROTRANSMISSION GST-90." ENGINEERING, ENERGY, TRANSPORT AIC, no. 1(120) (May 1, 2023): 102–9. http://dx.doi.org/10.37128/2520-6168-2023-1-12.

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Анотація:

Based on the analysis of transmissions of modern grain and fodder harvesters "Don", "Niva", "Yenisei", "KSK", "John Deere", "Challenger", "New Holland", "Class", road construction and reclamation machines, it was found that they are mainly equipped with a volumetric hydraulic drive of the GST-90 type. According to the data of the scientific and technical literature, in the transmissions of modern equipment for the agro-industrial complex, these reasons account for at least 35 %, including the failure of hydrostatic transmissions of the GST-90 type accounts for 20 % of the total number of machi

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42

Zeng, Qingliang, Kuidong Gao, Haizhong Zhang, Shoubo Jiang, and Kao Jiang. "Vibration analysis of shearer cutting system using mechanical hydraulic collaboration simulation." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 231, no. 4 (2017): 708–25. http://dx.doi.org/10.1177/1464419317705986.

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Анотація:

The cutting unit of a mining shearer is composed of a drum, gear transmission and hydraulic height adjusting mechanism. To obtain the dynamic characteristics of crucial components in the coal cutting process, a model of a drum cutting coal was constructed using LS-DYNA. The model of gear transmission was constructed with Adams, and a model of the hydraulic height adjusting system was constructed with AMESim. Data transmission and co-simulation of these three models were implemented with MATLAB. Changes of the meshing force, acceleration and amplitude–frequency characteristics of key gears unde

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43

Luo, Jie, Yun Hui Wang, Qian Wen Zhao, Hui Guo, and Fei She. "Study on Liquid Volume Measurement Based on Wireless Transmission and Hydraulic Sensors." Applied Mechanics and Materials 263-266 (December 2012): 392–97. http://dx.doi.org/10.4028/www.scientific.net/amm.263-266.392.

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Анотація:

Based on hydraulic sensors and wireless transmission, a new wireless measurement method of liquid volume in a tank is introduced. This measurement system includes hydraulic pressure sensors, A/D converter, GPRS (General Packet Radio Service) module and upper monitor in a computer, from which the users can get aware of the liquid volume in a tank at any time. The measurement system has been built，calibrated and tested. The experimental results show that this measurement system works well and the measurement error is less than 1%.

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44

Chen, Linlin. "Hydraulic Lifting and Rotating System Lifting Machinery Transmission Control Design." Mobile Information Systems 2022 (June 7, 2022): 1–6. http://dx.doi.org/10.1155/2022/4617971.

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Анотація:

With the continuous improvement of the level of intelligence in the construction machinery industry, as one of the core technologies in the hydraulic lifting and rotating system, the lifting transmission control system has become a key factor in determining the performance of the elevator. As a hydraulic lifting machine with high protection level and powerful functions, the mechanical transmission controller has been recognized by the market. This study is based on the design of lifting machinery transmission control of hydraulic lifting and rotating system and studies the lifting mechanism tr

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45

Yu, Jin, Zhu Cao, Min Cheng, and Rongzhao Pan. "Hydro-mechanical power split transmissions: Progress evolution and future trends." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 233, no. 3 (2018): 727–39. http://dx.doi.org/10.1177/0954407017749734.

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Анотація:

The hydro-mechanical power split transmission is an important form of hydraulic hybrid transmission, combining the stepless speed characteristics of hydraulic transmission and the high efficiency of mechanical transmission. Recently, the hydro-mechanical power split transmission, with its relatively large potential for energy recovery and improving the environment, and its low cost, has attracted many scholars from all over the world. Because there are many types of hydro-mechanical power split transmission, the different forms are complex, and researchers across the world are relatively dispe

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46

Lou, Xi Yin. "Study on the Design of Composite Transmission System for Crawler Type Full-Feeding Combine Harvester." Applied Mechanics and Materials 722 (December 2014): 80–83. http://dx.doi.org/10.4028/www.scientific.net/amm.722.80.

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Анотація:

Transmission system is an important part of combine harvester, and is the main indicator to measure the level of technology. This paper presents the design of a composite hydraulic mechanical transmission system for combine harvester. The system consists of engine, variable pump, quantitative hydraulic motor, planetary reducer, driving wheel, crawler etc. Author analyzes the continuous variable speed regulation characteristics of transmission; determines selection method of hydraulic components and mechanical parameters. Composite transmission system can make the engine is close to full load o

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47

Savaresi, S. M., F. Taroni, F. Prevedi, and S. Bittanti. "On the design and tuning of the controllers in a power-split continuously variable transmission for agricultural tractors." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 217, no. 8 (2003): 745–59. http://dx.doi.org/10.1243/09544070360692131.

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Анотація:

In this work, a power-split continuously variable transmission (CVT) used in high-power tractors is considered. Power-split CVTs are characterized by the combination of a traditional discontinuous mechanical transmission and a continuously variable transmission. This provides, at the same time, smooth variations of the transmission ratio and high efficiency of the overall transmission system. The CVT considered in this paper is a hydrostatic power-split unit conceived for top-power agricultural tractors. The goal of this paper is to present a case study on the design and tuning of the control

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48

Li, Yuan, Jie Yue, Qiu Bo Huang, and Yan Ping Sun. "Dynamic Simulation Analysis of Hydraulic Mechanical Power Split CVT." Advanced Materials Research 971-973 (June 2014): 458–62. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.458.

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Анотація:

Completed solid model of hydraulic mechanical power split CVT using Pro/E software basing on the transmission principle, achieved the whole transmission without interference assemble by the interference analysis and checking the gap. Carried on dynamics simulation analysis using ADAMS software, obtained the variation of plungers’ centroid and the bearing force in the rear end cover, it laid the theoretical foundation for subsequent experimental analysis.

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49

Zhu, Zhen, Xiang Gao, Dao Yuan Pan, and Yu Zhu. "Efficiency Analysis on Hydro-Mechanical Transmission." Advanced Materials Research 1037 (October 2014): 216–20. http://dx.doi.org/10.4028/www.scientific.net/amr.1037.216.

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Анотація:

In order to study the efficiency on hydro-mechanical transmission (HMT),this paper analyses the stepless speed regulation characteristic,torque characteristic and hydraulic power distributing characteristic of HMT.According to the calculating method of efficiency of the closed pump-motor system and planetary gear,the approximate efficiency formulas of HMT were established.The result shows that:the efficiency of HMT is much higher than that of hydrostatic transmission (HST),the peak efficiency of HMT can reach about 90% and the average efficiency of HMT can exceed more than 80%.

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50

Zhao, Xin, Xiangdong Ni, Qi Wang, Mingxi Bao, Sheng Li, and Shuangman Han. "Research on adaptive control strategy of hydraulic mechanical continuously variable transmission of a cotton picker." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 234, no. 17 (2020): 3335–45. http://dx.doi.org/10.1177/0954406220916536.

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Анотація:

Hydraulic mechanical continuously variable transmission has the advantages of good hydraulic stepless speed regulation performance and high efficiency of mechanical transmission, which can achieve the optimal matching of transmission system load and power source. In this article, an adaptive control strategy based on radial basis function neural network and proportional–integral–derivative control was proposed. The speed compound control method was used to solve the problems that the output speed of the hydraulic mechanical continuously variable transmission system was poor at the variable spe

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