摘要
针对航空柱塞泵配流副磨损失效问题,基于Archard方程和流-热-固耦合方法,建立一种适用于高速高压条件下的航空柱塞泵配流副摩擦磨损预测模型。考虑配流副流体压力、温度和固体之间耦合效应对磨损的影响,首先建立配流副流-热-固耦合模型,通过有限元法求解得到配流副油膜压力和温度场,将其作为磨损预测模型的边界条件;然后通过配流副泄漏流量与油膜厚度之间的关系,对配流副磨损失效寿命进行预测分析。预测结果表明:航空柱塞泵在转速10000 r/min、出口压力28 MPa条件下,配流副的磨损失效寿命在2000 h以上;但随着转速和压力的升高,配流副磨损失效寿命明显缩短,在转速15000 r/min、出口压力35 MPa条件下,配流副磨损寿命仅为450 h。由此提出一些提高配流副磨损寿命方法,该预测模型对高速高压航空柱塞泵配流副的设计具有一定的指导意义。
Based on the Archard equation and fluid-thermal-solid coupling method,a friction and wear prediction model for the aircraft piston pump port pair under high-speed and high-pressure conditions is established.Considering the coupling effect between the pressure,temperature and solids of the port pair on wear,a fluid-thermal-solid coupling model of the port pair is established.The oil film pressure and temperature fields of port pair are obtained by the finite element method,which will be used as the boundary conditions of wear prediction model.Then through the relationship between leakage flow rate and oil film thickness,the wear failure life of port pair is predicted and analyzed.The results show that the wear failure life of port pair is more than 2000 h under the conditions of 10000 r/min speed and 28 MPa pressure of aircraft piston pump.However,with the increase of speed and pressure,the wear failure life of port pair is significantly shortened.When the speed is 15000 r/min and the pressure is 35 MPa,the wear life of port pair is only 450 h.Therefore,some methods to improve the wear life of port pair are proposed.The prediction model has a certain guiding significance for the design of port pair of the high-speed and high-pressure aircraft piston pump.
作者
陈远玲
班成周
刘银水
张阳
张毅
高骁卿
CHEN Yuan-ling;BAN Cheng-zhou;LIU Yin-shui;ZHANG Yang;ZHANG Yi;GAO Xiao-qing(School of Mechanical Engineering,Guangxi University,Nanning,Guangxi 530004;School of Mechanical Science and Engineering,Huazhong University of Science and Technology,Wuhan,Hubei 430074)
出处
《液压与气动》
北大核心
2020年第12期1-7,共7页
Chinese Hydraulics & Pneumatics
基金
国家重点研发计划项目(2016YFC0304800)。
作者简介
陈远玲(1964—),女,广西柳州人,教授,主要从事液压技术方面的科研和教学工作。
