Готові списки джерел за темами / Hydraulic automatic devices

Добірка наукової літератури з теми "Hydraulic automatic devices"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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Статті в журналах з теми "Hydraulic automatic devices"

PARKHOMENKO, S. G., and G. G. PARKHOMENKO. "SIMULATION OF AUTOMATIC CONTROL SYSTEMS OF TILLAGE UNITS." Traktory i sel hozmashiny 84, no. 1 (January 15, 2017): 22–31. http://dx.doi.org/10.17816/0321-4443-66258.

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The studies were performed to improve workflow of hydraulic automatic control systems of the tillage units. Tillage quality should not deteriorate. Working bodies of tillage machines have to be moved automatically. Automated devices can be separated into two groups: direct and indirect action. It is preferable to indirect action. The article presents analysis of automatic devices used into tillage machines. Automatic control systems can be hydraulic, electro-hydraulic and pneumatic. Mechanical systems are not effective. Hydraulic systems are cheaper electric and pneumatic. They provide best of energy and quality indicators of technological process of tillage. Automatic control systems are uses draft forces, hitch position, depth of the implement, speed, acceleration and other sensors. Method of computer modeling and optimization of hydraulic automatic control systems of tillage units was developed. Results of computer modeling of hydraulic automatic control systems help to select direction of improving quality and energy indicators of technological process of tillage. Optimized combine implement depth and draft control system of arable unit allow reducing deviation the draft force of the plow; deviation of the depth of plowing is equal to or smaller than agro-technical requirements. Deviation of the draft force was decreased to 13.5 % for deviation specific soil resistance - 20 %, depth of plowing - 0.21 m, deviation of the depth of plowing - 0.019 m (9 %). Deviation of the depth of plowing may be decreased to 0.010 m (4,8 %), but deviation of the draft force shell be increased up to 16.2%. Optimized hydraulic automatic control system of garden tiller with a trapezoidal mechanism leaves smaller untreated soil area from 1.37-1.46 times.

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Vasiliev, VB, AP Muslimov, and VA Vasiliev. "Universal test bench for studying automatic systems to control operating modes of hydraulic drilling machines and hydraulic equipment." IOP Conference Series: Earth and Environmental Science 991, no. 1 (February 1, 2022): 012018. http://dx.doi.org/10.1088/1755-1315/991/1/012018.

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Abstract The paper presents hydraulic diagrams of the developed universal test bench for the practical study of designed automation tools, obtaining their output parameters, as well as for adjusting hydraulic liquid flow controllers and analyzing the operability of automatic systems for regulating the operating modes of drilling machines. The operating principle of test bench and technical characteristics of its main hydraulic devices are investigated.

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Колобовникова, Д., D. Kolobovnikova, Евгений Майданюк, Evgeny Maydanyuk, Э. Петровский, and E. Petrovsky. "Automation of engine alignment in pumping facility." Science intensive technologies in mechanical engineering 2, no. 6 (June 1, 2017): 44–48. http://dx.doi.org/10.12737/article_592d163e95d2a0.50506220.

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The existing ways and devices for the fulfillment of shaft alignment processes in rotor machines are considered. A principle of the operation of three-flow hydraulic system control of the device for alignment is described. A circuit diagram of the operation of hydro-static bearings, hydraulic cylinders of lifting and a rotating hydraulic actuator is shown. A system for automatic control on a signal of mismatch is described.

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Lazutkin, Sergey. "On Creation of Energy-Saving Hydraulic Impact Devices." Applied Mechanics and Materials 756 (April 2015): 610–14. http://dx.doi.org/10.4028/www.scientific.net/amm.756.610.

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Ochkur, Galina. "DYNAMIC CHARACTERISTICS CALCULATION FOR ELECTRO-HYDRAULIC CONVERTER OF NOZZLE-FLAP TYPE FOR MODERNIZATION OF SYSTEM FOR MOTOR-CAR FUEL FEEDING CONTROL." Bulletin of Bryansk state technical university 2020, no. 5 (May 13, 2020): 32–38. http://dx.doi.org/10.30987/1999-8775-2020-5-32-38.

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At the current stage of the development of means for automatic control for the formation of qualitative systems of machines, construction and road machinery, railway transport there are used electro-hydraulic devices transforming electric input signals into hydraulic output power. To carry out a generalized analysis and for the fulfillment of the preliminary synthesis of an automated hydraulic system on the whole the static and dynamic characteristics of its separate units should be obtained. In the paper there is presented a calculation of a theoretical dynamic characteristic of the electro-hydraulic nozzle-flap converter to substantiate potentialities of its inclusion as an adjusting device acting upon rods of a high-pressure fuel pump in the system of fuel feeding control of a KamAZ motor-car engine. At that the converter was considered as interconnected units: a unit of feedback. The methods of the investigation of processes in the converter are based on the fundamentals of the theory of automatic control. As it follows from the transition function diagram obtained as a result of the investigations carried out the transition time of a electro-hydraulic converter slide valve movement from a neutral position into an extreme one in the course of sending a maximum control signal to the coil does not exceed 1.1 sec, that is satisfactory for the formation of hydraulic drive control systems.

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Tarasevych, Yuliia, and Nataliia SOVENKO. "THE IMPACT OF SELECTED PARAMETERS ON PRESSURE DISTRIBUTION IN THE FACE THROTTLE OF A CENTRIFUGAL PUMP AUTOMATIC BALANCING DEVICE." Tribologia 297, no. 3 (December 30, 2021): 35–44. http://dx.doi.org/10.5604/01.3001.0015.6895.

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Face throttles are a necessary functional element of non-contact face seals and automatic balancing devices of centrifugal pumps of different constructions. To calculate the hydrodynamic forces and moments acting on the rotor and fluid flow through the automatic balancing device, it is necessary to know the pressure distribution in the cylindrical and face throttle when considering all important factors which predetermine fluid flow. The face throttle surfaces are moving, which leads to unsteady fluid flow. The movement of the walls of the face throttle causes an additional circumferential and radial flow, which subsequently leads to the additional hydrodynamic pressure components. The paper analyses viscous incompressible fluid flow in the face throttle of an automatic balancing device taking into account the axial and angular displacements of throttle’s surfaces and the inertia component of the fluid. The effect of local hydraulic losses as well as random changes in the coefficients of local hydraulic resistance at the inlet and outlet of the throttle is analysed.

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Zhu, Qingyuan, Yuanhui Liu, Huosheng Hu, Liang Hou, and Mingjie Guan. "Using wavelet denoising in automatic online efficiency estimation of a hydraulic excavator." Transactions of the Institute of Measurement and Control 39, no. 8 (March 15, 2016): 1262–70. http://dx.doi.org/10.1177/0142331216634428.

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A hydraulic excavator has a number of devices attached, the operating speeds of which are important performance indicators for performance evaluation and end-of-line inspection. This paper proposes an online and low-cost detection method to estimate the operating speed based on the peak detection of the main pump outlet pressure. A pressure sensor is installed on the main pump discharge point of a hydraulic excavator to collect real-time pressure data during operation. Then the wavelet method is deployed to denoise the obtained pressure data so that two special peak points are captured as start and end points for accurately estimating the operating time and speed of excavator devices. The proposed system is used for end-of-line inspection and performance evaluation of hydraulic excavators. Experimental results from 510 groups of data show that the proposed method can achieve a high success rate of 95.1%, and a high detection efficiency that is 60% faster than manual measurement.

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Wang, Jian Chen, and Xiao Lei Deng. "The Design of Rolling Mills’ Automatic Control System Based on PLC." Key Engineering Materials 546 (March 2013): 25–29. http://dx.doi.org/10.4028/www.scientific.net/kem.546.25.

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The rolling mill is a kind of mechanical equipment which rolls steel ingot or billet continuously into steel. This paper selected 1150 blooming mill as research subject. In order to realize the automatic control of 1150 blooming mill, hydraulic screw-down devices and the automatic control system of hydraulic screw-down position are used, and Siemens PLC is chose as the control system's main control unit. Then industrial control technologies are used, such as DC digital controller, touch screen, photoelectric-interrupter type position sensor.

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Khan, Mahbubul A., and Vinod K. Garga. "A simple design for hydraulic consolidometer and volume gauge." Canadian Geotechnical Journal 31, no. 5 (October 1, 1994): 769–72. http://dx.doi.org/10.1139/t94-087.

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This technical note describes the use of nitrile U-cup seals to simplify and improve the design of a hydraulic consolidometer and automatic volume gauge. The new devices are inexpensive and easy to fabricate and can readily be connected to a computerized data acquisition and control system. Key words : hydraulic consolidometer, volume gauge, bellofram seal, laboratory testing, U-cup seal.

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Deng, Chang Qi, and Bin Li. "The Design of Program for NTC Automatic Tool Change Based on S7-300." Key Engineering Materials 464 (January 2011): 322–26. http://dx.doi.org/10.4028/www.scientific.net/kem.464.322.

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The paper introduced the technical process of components and tool change of NTC, and analyzed the details of control of programmable logic controller (S7-300) in NTC. By adopting single-step operation,single cycle operation and sequence control devices, the control combines the Siemens configuration WinCC and WINCC analog simulation. The whole control fraction adopts hydraulic pressure to control, and the most famous advanced modeling and simulation platform for engineering system in the world, AMESim, is used in hydraulic part for modeling and simulation.

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Більше джерел

Дисертації з теми "Hydraulic automatic devices"

Бартош, Тарас Тарасович, та Taras Bartosh. "Інформаційно-вимірювальна система установки для розсортування деталей за внутрішнім діаметром отворів". Master's thesis, ТНТУ ім. І. Пулюя, 2020. http://elartu.tntu.edu.ua/handle/lib/33691.

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Розроблено інформаційно-вимірювальну систему установки для розсортування деталей за внутрішнім діаметром отворів. В даній кваліфікаційній роботі магістра було розроблено та спроектовано механізми подачі та розсортування, механізм подачі деталей. Проведено дослідження похибки вимірювання даного пристрою. Проаналізовано та описано технічні вимого до метеорологічних параметрів системи. Описано роботу приладу, його структурні та принципову схеми. Розраховано параметри схеми.
The information-measuring system of installation for sorting of details on internal diameter of apertures is developed. In this qualification work of the master the mechanisms of giving and sorting, the mechanism of giving of details have been developed and designed. A study of the measurement error of this device carried out. The technical requirements for the meteorological parameters of the system are analyzed and described. The operation of the device, its structural and schematic diagrams are described. Scheme parameters are calculated.
Вступ...7 1 Аналітична частина...8 1.1 Аналіз аналогів...8 1.2 Результати патентного пошуку ...13 2 Основна частина...17 2.1 Вимоги до роботи приладу ...17 2.2 Схема та принцип роботи приладу ...17 2.3 Механізм подачі деталей та розсортування ...19 2.4 Механізм подачі деталей...20 2.5 Механізовані приводи установок...22 2.6 Побудова циклограми роботи установки ...25 2.7 Аналіз об’єкту вимірювання і технічних вимог до метрологічних параметрів системи...31 2.8 Аналіз і оцінка похибки схеми ...32 2.9 Похибка установки ...35 2.10 Повірка пристрою ...38 2.11 Проведення повірки...39 3 Науково-дослідна частина...41 3.1 Розрахункова частина...41 4 Спеціальна частина ...51 4.1 Опис роботи приладу...51 4.2 Опис структурної схеми і алгоритму роботи електричної схеми...55 4.3 Опис роботи принципової схеми приладу ...57 4.4 Розрахунок параметрів схеми...58 4.5 Електронна принципова схема ...62 4.6 Опис роботи принципової схеми ...63 4.7 Опис роботи програми ...67 5 Охорона праці та безпека в надзвичайних ситуаціях...69 5.1 Охорона праці...69 5.1.1 Заходи з охорони праці при виконанні монтажних робіт ...69 5.1.2 Санітарно-гігієнічне та побутове обслуговування робітників...70 5.1.3 Розрахунок штучного освітлення...70 5.2 Безпека в надзвичайних ситуаціях...75 5.2.1 Організація безпеки в надзвичайних ситуаціях при автоматизації технологічного процесу ...75 5.2.2 Створення цивільного захисту на ОГД ...77 5.2.3 Галузеві системи управління охороною праці. Мета та принципи функціонування...82 ЗАГАЛЬНІ ВИСНОВКИ ДО КВАЛІФІКАЦІЙНОЇ РОБОТИ ...85 ПЕРЕЛІК ПОСИЛАНЬ...86 ДОДАТКИ...

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Узунов, Александр Васильевич. "Развитие теории моделирования и проектирования мехатронных систем и устройств". Doctoral thesis, 2011. https://ela.kpi.ua/handle/123456789/1319.

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Книги з теми "Hydraulic automatic devices"

ZnO bao mo zhi bei ji qi guang, dian xing neng yan jiu. Shanghai Shi: Shanghai da xue chu ban she, 2010.

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Hermann, Schweickert, ed. Voith power transmission: 100 years of the Fottinger principle. Berlin: Springer-Verlag, 2005.

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Тези доповідей конференцій з теми "Hydraulic automatic devices"

Koehler-McNicholas, Sara, Gregory Voss, Evandro Ficanha, John Looft, Nicole Walker, James Colvin, Andrew Hansen, and Matthew Wernke. "A Hydraulic Bimodal Ankle to Improve Mobility and Stability for Prosthesis Users." In 2020 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/dmd2020-9061.

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Abstract A bimodal prosthetic ankle-foot system has been developed to support the demands of both walking mobility and standing balance. Using a novel hydraulic locking mechanism, this system provides a curved effective rocker shape for walking and a flat effective rocker shape for standing and swaying on non-level surfaces. To date, the hydraulic cylinder sub-assembly has been cycle tested to 1.2 million cycles. Future testing with lower-limb prosthesis users is planned, which will reveal the extent to which this new hydraulic ankle-foot design improves standing balance on both level and non-level surfaces. The capacity for an automatic switching algorithm, designed to appropriately detect and switch between modes as users transition between walking and standing tasks, will also be evaluated.

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Thompson-Salinas, Alfonso, Martin Ortega-Bren˜a, Manuel H. De la Torre-Ibarra, Bernardino Barrientos-Garci´a, and Victor J. Gonzalez-Villela. "Hydraulic Balance Ring Study and Design Using Optical Techniques." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63260.

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A new approach to understand factors that affect self-balancing devices is proposed. Experimentation was conducted to determine the influence of different factors on the performance of an automatic washing machine hydraulic balance ring fluid during transient and steady states. Two different optical techniques were used: one for visualization (high-speed photography) and another for velocity field measurement (Particle Image Velocimetry, PIV). Results were used to build a new balancer design and compared with previous findings. Important factors in balancer design were deducted.

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Bay, Andrew T. "Using CAE Simulation to Develop Increased Understanding, Repeatability and Reproducibility for Testing Electro-Hydraulic Automatic Transmission Control Devices." In SAE 2000 World Congress. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2000. http://dx.doi.org/10.4271/2000-01-0124.

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Taugbøl, Knut, Bengt Sola, Matthew Forshaw, and Arild Fjogstad. "Automatic Drilling Fluids Monitoring." In SPE/IADC International Drilling Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/204041-ms.

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Abstract The drilling fluid is the primary barrier against well control incidents when drilling a well in conventional mode and the drilling fluid properties must be correct at all times to prevent well control incidents. Automatic drilling fluid monitoring through automated measuring techniques combined with real time data transfer into control center with 24/7 surveillance substantially improves this control compared to conventional methods relying on manual measurements with long sampling intervals. New measurement devices have been introduced to the industry which measure the drilling fluid properties of all fluid going into the well as well as fluid coming out from the well. Properties measured are among others density and a full rheology profile. The data are transferred to users on the rig as well as directly to onshore operation centers. This highly improves the fluid engineering, enabling a more precise diagnostician and treatment in real time. This also improves efficiency when performing displacements from one fluid system to another. This paper will present new units for automatic drilling fluids measurements and its use in offshore drilling. The surveillance of fluid properties and the use of data at an onshore operation center will be presented. The drilling fluid properties are also detrimental for drilling parameters such as ECD (equivalent circulating density), surge and swab pressures and hole cleaning properties and the added data will improve any estimation of such parameters. The paper will present experiences from use of these data into advanced real time hydraulic measurements and models for automatic drilling control and explain how this can improve safety in the drilling operations as well as improve the drilling efficiency.

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Luna, J. M., S. Hernandez-Guerrero, C. Rubio-Arana, and R. H. Chavez. "Transient Analysis of the Thermal and Hydraulic Behavior of a Cooling Fluid in a Bayonet Tube." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-16265.

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Analysis of forced convection in transient fluid flows have recently gathered attention due to the development of automatic control devices for precision control of the fluid flow in heat transfer devices of high efficiency. The precise regulation of the fluid flow is very important when the control of heat exchangers has to be assured, thus requiring a better understanding and a precise evaluation of the transient heat behavior. With few exceptions, the calculus methods for the heat exchangers devices are based on the flow patterns using considerations that could be apart from reality and restricted to stationary state conditions. These methods give little information on the possible variations due to the fluid flow changes and temperature distribution that arise due to thermal stresses. This paper deals with the details of a numerical approach to describe the transient hydrodynamic and thermal behavior in a bayonet tube with a fixed geometry using water as the working fluid. The results are reported as a function of the dimensionless Reynolds, Euler and Nusselt numbers. For each zone of the bayonet tube the time required for the fluid flow to be hydro and thermally developed is determined. The effect of the hydrodynamic flow changes on the heat flow local distribution is discussed. For a given Reynolds number a separation vortex is detected in the returning zone and it changes its position as time elapses. It is found that as time approaches the steady state the heat transfer becomes more stable throughout the bayonet.

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Valdiero, Antonio C., Ronei O. Ziech, Mauricio S. Pinto, Ivan J. Mantovani, and Luiz A. Rasia. "Development and Construction of an Instrumentalized Workbench With a Hydraulic Motor for Farm Machine Testing." In 9th FPNI Ph.D. Symposium on Fluid Power. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/fpni2016-1552.

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This work addresses the design and the construction of an instrumentalized workbench with hydraulic motor. The primary purpose of estimating the consumed power for farm machines, as for example the power consumption on the drive shaft of a variable rate fertilizer targeted for applications in precision agriculture. The estimate of the consumed power is important for the better design of the transmission elements and for machines control and design, collaborating for the reduction of the mass and the costs of the prototype. The instrumentalized workbench was used to estimate the actual consumed power in fertilizer dosing devices used in precision agriculture, allowing the correct specification of the power system to drive and the validation of modeling and variable rate control. The aim is to measure and to evaluate the power consumption of a commercial fertilizer in different fertilization rates with usual fertilizer. The used methodology is based on the needs analysis, design and construction of an instrumented bench with hydraulic motor for fertilizer prototype testing. The experimental prototype was tested at the Innovation Center for Automatic Machines and Servo Systems (NIMASS) in UNIJUÍ University with support by IMASA, FINEP and CNPq. Tests with fertilizer mounted allowed the calculation of the consumed volumetric flow rates and the load pressure of the hydraulic motor, thus enabling the estimated consumed power. This research intends to contribute for the modeling and design of hydraulic systems applications in farm machines and the innovations development to technology transfer to manufacturer national company.

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Otanez, Paul G., Chunhao J. Lee, Xu Chen, Chi-Kuan Kao, and Farzad Samie. "Torque Converter Clutch Low Slip Speed Detection and Control." In ASME 2010 Dynamic Systems and Control Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/dscc2010-4184.

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A torque converter clutch (TCC) is an important element of automatic transmissions because it affects fuel economy and driveability. Although torque converters are ideal launch devices for transmissions, they are inefficient in steady-state operations. For that reason, a TCC is used to control and minimize the slip between the torque converter pump and turbine, thereby increasing the efficiency of the driveline and improving fuel economy. However, low TCC slip speeds increase the likelihood that disturbances cause the TCC to have zero slip or crash. In the absence of TCC slip, it is essential to quickly restore slip and regain driveline isolation to maintain driveability. To recover TCC slip, pressure to the TCC must be reduced significantly to overcome the effects of clutch material nonlinearities and hydraulic hysteresis. Unfortunately, large pressure reductions can also result in undesirable slip overshoot. In this investigation, the truncated sequential probability ratio test is used to achieve fast and robust detection at the low signal-to-noise ratios caused by the low TCC slip speeds. In the event of a crash, two unique TCC pressure command sequences are presented which maximize the response of the system hydraulics while also minimizing clutch slip overshoot. The effectiveness of the proposed methods are evaluated using experimental results from small and large vehicles equipped with automatic front and rear-wheel drive transmissions.

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Nadirov, Maruan, Renat Sadyrbakiyev, and Anton Skopich. "Well Performance Monitoring Using Management by Exception Rules and Alerts." In SPE Annual Caspian Technical Conference. SPE, 2021. http://dx.doi.org/10.2118/207003-ms.

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Abstract Wells in Tengiz and Korolev oil fields are equipped with data transmitting devices, which provide real-time process data used by Production engineers for continuous production monitoring and identification of unusual process conditions. Monitoring and analysis of each well performance becomes a tedious process with growing well inventory. Up until recently, real-time data from wellsite transmitters was not used to its full potential to simplify and automate well performance analysis. To improve the quality of daily well performance monitoring and detection of abnormal process conditions, sets of data rules have been developed to create alerts and screens with real-time process data managed by exception. These alerts and screens help to identify malfunctioning equipment and changes in operating conditions. Timely evaluation of critical conditions helps to proactively prepare a mitigation plan and prevent unscheduled well shutdowns. Data management by exception allows automatic filtering of big data sets and draws attention only to wells with deviations from the stable operating regime. Detailed review of highlighted well conditions helps to differentiate between malfunctioning equipment and actual changes in operating conditions. Fast identification of the issues allows taking preventative actions to maintain process stability of each producing well. Implementation of these tools significantly reduced number of unscheduled well shutdowns due to leaks in Surface Controlled Subsurface Safety Valve (SCSSV) hydraulic system and pneumatic valves control system. The screens also help to identify malfunctioning equipment including pressure and temperature gauges, pressure downhole gauges (PDHGs) and multiphase flow meters (MPFMs), as well as flow assurance issues such as hydrate formation. Developed data rules can be useful for any field equipped with data transmitting devices. This paper aims to share the best practices of using real-time operational data analytics to identify malfunctioning equipment, changing operating conditions and other process related issues to maintain stable production process.

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Xiaoming, Sheng, Si Guangju, and Li Xin. "Reconfigurable Hydraulic-Mechanical Combined Drive Devices Based on Multi-functional Piston-Rod Built-in Hydraulic Cylinder." In 2010 International Conference on Digital Manufacturing and Automation (ICDMA). IEEE, 2010. http://dx.doi.org/10.1109/icdma.2010.267.

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