摘要
针对高回油压力条件下航空液压柱塞泵壳体回油特性不明的问题,以某型航空液压柱塞泵为研究对象,对其壳体回油特性进行了仿真分析和试验研究。首先,在求解配流副润滑模型的基础上,考虑缸体倾覆、油液温度、回油压力等因素的影响,分别建立了配流副、柱塞副和滑靴副的泄漏模型;然后,对各摩擦副的泄漏模型进行了数值求解,分析了不同因素下各摩擦副的泄漏变化规律;最后,基于各摩擦副的泄漏量,计算了泵壳体回油压力-流量特性,并测试了不同回油压力下泵的壳体回油流量,对计算结果的有效性进行了验证。研究结果表明:在缸体倾斜角度较大和壳体回油压力较高时,配流副和滑靴副对壳体回油流量的贡献为负值,而柱塞副对壳体回油流量的贡献始终为正值;泵的壳体回油流量随着回油压力的升高而减小,当壳体回油压力为1.37 MPa时,壳体回油流量下降至0。
Aiming at the problem that the return oil characteristics of an aviation hydraulic piston pump shell were unknown under the condition of high return oil pressure,taking an aviation hydraulic piston pump as the research object,the return oil characteristics of the pump shell were simulated and tested.Firstly,on the basis of solving the lubrication model of cylinder/valve-plate pair,the leakage models of cylinder/valve-plate pair,piston/cylinder pair and slipper/swash-plate pair were established respectively,considering different factors such as cylinder tilting,oil temperature and return oil pressure.Then,the leakage model of each friction pair was numerically solved,and the leakage law of them under different factors was analyzed.Finally,based on the leakage of each friction pair,the return oil pressure-flow characteristics of the pump shell were simulated.The return oil flow of the pump shell under different pressure was measured to verify the validity of the calculation results.The research results show that,when the inclination angle of the cylinder block is large and the return oil pressure is high,the contribution of the cylinder/valve-plate pair and slipper/swash-plate pair to the return oil flow of the pump shell is negative.However,the contribution of piston/cylinder pair to the return oil flow of the pump shell is always positive.The return oil flow of the pump shell decreases with the increase of return oil pressure.When the return oil pressure of the pump shell is 1.37 MPa,the return oil flow of the pump shell will drop to zero.
作者
邱华
李东林
赵峰
杨书华
高火金
QIU Hua;LI Dong-lin;ZHAO Feng;YANG Shu-hua;GAO Huo-jin(Xinxiang Aviation Industry(Group)Co.,Ltd.,Xinxiang 453049,China;School of Mechatronics Engineering,Henan University of Science and Technology,Luoyang 471003,China)
出处
《机电工程》
CAS
北大核心
2023年第2期211-217,共7页
Journal of Mechanical & Electrical Engineering
基金
河南省科技攻关资助项目(212102210329,222102220012)。
关键词
容积泵
配流副润滑模型
柱塞副
滑靴副
缸体倾覆
壳体回油压力
内泄漏
positive displacement pump
cylinder/valve-plate pair lubrication model
piston/cylinder pair
slipper/swash-plate pair
cylinder tilting
return oil pressure of pump shell
internal leakage
