Analysis on the Steady-state Performance and Losses of a Bent-axis Type Hydraulic Motor Used in Heavy Earth Moving Machinery
DOI:
https://doi.org/10.13052/ijfp1439-9776.2231Keywords:
Bent axis hydro-motor, Flow-loss, Torque-loss, Hydraulic oil temperature, Overall efficiencyAbstract
Hydraulic components play a significant role in the mining and construction equipment. It is responsible for smooth change in the output speed, torque, and power of the machine. The hydrostatic drive powered by a constant speed electric motor is widely used in the propel system of the mining equipment. Regulation of the displacements of the pump and the hydro-motor of the drive facilitates the control of the straight running and steering of the machines.
In the present scenario, better efficiency and ease of control are the critical aspects to be considered in the design and selection of the hydraulic pump and motor used in underground mining operations. The bent axis hydro-motor is one such equipment that is an electro-hydraulic component that can work in an adverse working environment.
The present study deals with the performance analysis of fixed displacement bent axis hydro-motor at different operating parameters such as different temperatures, sizes, viscosity at different loads, and drive speed. For analysis, the hydraulic drive consists of a variable displacement pump rotated by a constant speed electric motor and a fixed displacement hydro-motor. The regulation of the pump displacement controls the speed of the drive. Manually controlled hydrostatic drive propels the said machine against variable load demands. The present work investigates the performances of the hydro-motor used in the mining and construction machine through detailed modeling and experimentations. The steady-state performances are analyzed in terms of slip, torque losses and efficiency of the hydro-motor. The study finds the design guideline to operate the hydrostatic drive using such motors in a reasonable efficiency zone.
The model is validated for various operating conditions of the equipment by comparing the predicted results with the test results. The outcome of the present work will be expedient for the preliminary design and assortment of similar hydraulic component used in the mobile, mining equipment.
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References
Manring ND, Luecke GR. Modeling and designing a hydrostatic transmission with a fixed-displacement motor. Journal of dynamic systems, measurement, and control, 1st March 1998; 120(1):45–49.
Huang J, Dong Z, Quan L, Jin Z, Lan Y, Wang Y. Development of a dual displacement controlled circuit for hydraulic shovel swing motion. Automation in Construction, 1st September 2015; 57:166–174.
Saber MS, EI-mashed YA, Abd Raboo S, Osman AM. Theoretical and experimental sensitivity analysis and control of hydraulic drive system. In Proceedings of the 10th ASAT conference, Military Technical Collage, Kobry EI-Kobbah, Cairo, Egypt, 13th–15th May 2003, paper GN-7, pp. 1001–1015.
Sill J, Molla S, Ayalew B. Modelling and control of handling dynamics for a hydrostatically driven vehicle. International Journal of Heavy Vehicle Systems, 1st January 2011; 18(3):322–340.
Comellas M, Pijuan J, Potau X, Nogues M, Roca J. Analysis of a hydrostatic transmission driveline for its use in off-road multiple axle vehicles. Journal of Terramechanics, 1st October 2012; 49(5):245–254.
Huang J, Zhao H, Quan L, Zhang X. Development of an asymmetric axial piston pump for displacement-controlled system. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, June 2014; 228(8):1418–1430.
Song Y, Wang D, Ren H, Cai J, Jing B. Research on hydraulic pump displacement control using PI and feed-forward compensation. Advances in Mechanical Engineering, December 2017; 9(12):1–8.
Pedersen NH, Johansen P, Andersen TO. Event-driven control of a speed varying digital displacement machine. In Proceeding of the ASME/BATH Symposium on Fluid Power and Motion Control, 16th–17th October, 2017, Sarasota, Florida, USA.
Ding H, Zhao J, Cheng G, Wright S, Yao Y. The influence of valve-pump weight ratios on the dynamic response of leaking valve-pump parallel control hydraulic systems, Applied Sciences, July 2018; 8(7):1201–1214.
Nordås S, Beck MM, Ebbesen MK, Andersen TO. Dynamic Response of a Digital Displacement Motor Operating with Various Displacement Strategies, Energies, January 2019; 12(9):1737–1747.
Yan WA, Shengrong GU, Hongkang DO. Modeling and control of a novel electro-hydrostatic actuator with adaptive pump displacement. Chinese Journal of Aeronautics, 1st January 2020; 33(1):365–371.
Xiong S, Wilfong G, Lumkes J. Components Sizing and Performance Analysis of Hydro-Mechanical Power Split Transmission Applied to a Wheel Loader, Energies, 2019; 12(9):1613–1631.
Inaguma Y. A practical approach for analysis of leakage flow characteristics in hydraulic pumps. Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Mechanical Engineering Science, 2013; 227(5): 980–991.
Ozfirat, K. M., Malli, T., Ozfirat, P. M., Kahraman, B. (2017). The performance prediction of roadheaders with response surface analysis for underground metal mine. Kuwait Journal of Science, 44 (2): 112–120.
Thoma, J. U. (1990). Simulation by Bond graph. Berlin Heideberg New York London Paris Tokyo: Springer-Verlag.
