考虑油液黏压特性的高压航空液压泵柱塞副泄漏模型研究  

Leakage Model Considering Viscosity-pressure Properties of Oil for Piston-cylinder Pair of High Pressure Aviation Hydraulic Pump

作　　者：李元[1] 王少萍[1] 石健[1] 郑硕 LI Yuan;WANG Shao-ping;SHI Jian;ZHENG Shuo(School of Automation Science and Electric Engineering,Beihang University,Beijing 100191)

机构地区：[1]北京航空航天大学自动化科学与电气工程学院,北京100191

出　　处：《液压与气动》2018年第5期13-19,共7页Chinese Hydraulics & Pneumatics

基　　金：国家重点基础研究发展计划(973计划)(2014CB046405)

摘　　要：提高机载液压系统压力可以提高液压系统功率密度,但是随着航空液压泵转速增大和压力增高,关键摩擦副之一的柱塞副磨损加剧,泄漏量增大。提出了一种考虑油液黏压特性的高压航空液压泵柱塞副泄漏量模型。结合Barus液压油液黏压公式,在经典泄漏量公式的基础上进行一定程度的补充和修正,以便更精确的计算高压航空液压泵柱塞副各种磨损程度下的泄漏量。仿真结果表明,系统压力达到35 MPa,黏度变化导致的泄漏量变化不可忽略。Increasing the pressure of the hydraulic system can improve the power density of the hydraulic system.However,with the increase of the speed of the hydraulic pump and the increase of pressure,the wear of the piston-cylinder pair,one of the key friction pairs,is aggravated and the leakage is increased.A leakage model of piston-cylinder pair in a high pressure aviation hydraulic pump is presented in this paper,considering the pressure-viscosity properties of oil.Combined with the Barus pressure-viscosity properties formula,this model is supplemented and modified to a certain extent on the basis of the classical leakage formula,so as to more accurately calculate the leakage of the high pressure aviation hydraulic pump s piston-cylinder pair in various wear degrees.The simulation results show that the pressure of the system reaches 35 MPa,and the change of leakage caused by viscosity change can not be ignored.

关 键 词：黏压特性 高压 航空液压泵 柱塞副 泄漏量 

分 类 号：TH137[机械工程—机械制造及自动化]