Experimental study of frictional torque properties of plane port pairs in axial piston pump
WANG Bin1,2, ZHOU Hua1, YANG Hua-yong1
(1. State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China;
2. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)
According to the load behavior of the porting mechanism in axial piston pump, frictional torque’s composition and theoretical calculation were presented under solid lubrication, boundary lubrication and whole film lubrication between port plate and cylinder block. The frictional torque of the port pair was tested under different oil film heights and rotation speeds to study the effects of working condition parameters on frictional torque. The relationship between the change process of frictional torque and the wear pattern of port pair in one rotor period was discussed. The approximate percent of the whole pump mechanical power loss due to the port pair’s frictional torque was reached. The results show that load is the fundamental factor resulting in variation of the frictional torque, and that the uneven wear in the region connecting sucking slot and delivering slot is a normal appearance in port pairs. The oil film height significantly affects the frictional torque, but it does not work as monotonic inverse proportion relationship. A film height of 5 μm causes about 10% frictional power loss．
WANG Ban, ZHOU Hua, YANG Hua-Yong. Experimental study of frictional torque properties of plane port pairs in axial piston pump. J4, 2009, 43(11): 2091-2095.
[1] 李元勋. 液压马达新型端面配流副理论、实验及CAD研究[D]. 哈尔滨：哈尔滨工业大学, 1996: 59-72．
LI Yuan-xun. A study of theory, experiment & CAD of a new typed plain flow distribution pair in hydraulic motors [D]. Harbin: Harbin Institute of Technology, 1996: 59-72．
[2] 许耀铭. 油膜理论与液压泵和马达的摩擦副设计[M]. 北京：机械工业出版社, 1987: 305-310．
[3] ZEIGER G, AKERS A. Torque on the swash plate of an axial piston pump [C]∥ ASME Dynamics and Control of Thermofluid Processes and Systems. New Orleans: ASME, 1984: 47-55．
[4] AHN S Y, RHIM Y C, HONG Y S. Lubrication and dynamic characteristics of a cylinder block in an axial piston pump [C]∥ Proceedings of the World Tribology Congress III. Washington D.C.: ASME, 2005: 223-224．
[5] MANRING N D, WRAY C L, DONG Z L. Experimental studies on the performance of slipper bearings within axial-piston pumps [J]. Journal of Tribology, 2004, 126(3): 511-518．
[6] 姜继海. 流体变粘度缝隙流动理论与解析[M]. 北京：国防工业出版社, 2005: 1-18．
[7] LI Yong, SHI Guang-lin, CHEN Zhao-neng. Lubrication film formation mechanism of slipper pairs in low speed high torque hydraulic motors [J]. Chinese Journal of Mechanical Engineering, 2007, 20(1): 31-35．
[8] KIM J K, KIM H E, LEE Y B, et al. Measurement of fluid film thickness on the valve plate in oil hydraulic axial piston pumps. Part II: Spherical design effects [J]. Journal of Mechanical Science and Technology, 2005, 19(2): 655-663．
[9] HARIGAYA Y, SUZUKI M, TAKIGUCHI M. Analysis of oil film thickness on a piston ring of diesel engine: effect of oil film temperature [J]. Journal of Engineering for Gas Turbines and Power, 2003, 125(2): 596-603．
[10] 艾青林,周华,杨华勇. 微米级电液位置反馈控制系统的研究[J]. 浙江大学学报：工学版, 2005, 39(12): 1936-1940．
AI Qing-lin, ZHOU Hua, YANG Hua-yong. Research on micron electrohydraulic position feedback control system [J]. Journal of Zhejiang University: Engineering Science, 2005, 39(12): 1936-1940．
