高速内啮合齿轮泵齿圈的微动现象及验证  

Micro-motion phenomenon and verification of the ring gear of high-speed internal gear pump

作　　者：孙飞 冀宏[1,2] 杨胜清 周新生 林博 SUN Fei;JI Hong;YANG Shengqing;ZHOU Xinsheng;LIN Bo(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Key Laboratory of Advanced Pumps,Valves and Fluid Control System of the Ministry of Education,Lanzhou University of Technology,Lanzhou 730050,China;Guangxi Liugong Yuanxiang Technology Co.Ltd.,Liuzhou 545007,China)

机构地区：[1]兰州理工大学能源与动力学工程学院,兰州730050 [2]兰州理工大学特种泵阀及流控系统教育部重点实验室,兰州730050 [3]广西柳工元象科技有限公司,柳州545007

出　　处：《农业工程学报》2025年第5期20-26,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金资助项目(52075233);广西科技重大专项项目(桂科AA23023012);柳州市科技计划项目(2022ABC0101)。

摘　　要：为了探明高速内啮合齿轮泵摩擦副的磨损机理,改善摩擦副的润滑条件,该研究建立了内啮合齿轮泵的瞬态动力学模型,发现了齿圈的微动现象,并通过原位测量试验进行验证,结合仿真和试验明确了齿圈的微动特性。结果表明,在惯性力影响下,齿圈同时存在径向和轴向微动现象;转速越高,齿圈的径向微动量越大,与泵体的接触位置具有随机性,而轴向微动幅值逐渐减小,转速从1006 r/min升至3002 r/min,齿圈的轴向微动幅值减小了27μm,但与配合面的接触频率每秒增加了1.46次;齿圈端面与泵体配合面存在接触后反弹和再次接触反弹现象,并且两次接触的位置不同,仿真与实际接触位置吻合;当转速超过3000 r/min,齿轮副发生磨损,且平键连接方式下的齿圈端面磨损更明显,表明高转速下,花键连接更优,花键或平键连接方式下,小齿轮的轴向微动量均比齿圈小,最大微动量为5μm。研究结果可为高速内啮合齿轮泵摩擦副的抗磨减摩设计提供指导。High-speed hydraulic pump aims to comply with the inevitable electrification trend of hydraulic power units.Among them,the internal gear pump can be expected in agricultural and engineering machinery,due to its simple structure,high power density,low noise,and small flow pulsation.However,the ever-increasing wear of friction pairs has limited the high-speed operation.The microscopic degrees of freedom of the pinion gear and the ring gear cannot be constrained under the spline or flat key connection.The extremely complicated kinematic and dynamic behaviors of the gear pairs can often occur under the inertia force,oil film pressure,and medium temperature rise.This study aims to explore the wear mechanism and lubrication conditions of the friction pairs in the high-speed internal gear pump.A transient dynamic model of the internal gear pump was then established.The casing of a real internal gear pump cartridge kit was simplified as a circular ring,and the low and the highpressure side plates were simplified as the side plates 1 and 2,respectively.Specifically,the side plates were used to limit the axial displacement,whereas,the radial displacement of the ring gear was limited by the circular ring.The inner spline surface of the pinion gear and the spline shaft,the pinion tooth surface,and the inner tooth surface of the ring gear were defined as the surface-to-surface contact.The rest parts were defined as the general contact for their unknown contact state.The clearance of each friction part was determined,according to the actual product.The implicit dynamic analysis was used to solve the final state between each component.The contact pressure was used to represent the contact state of each component.The contacts then occurred,when the contact pressure was not zero.Furthermore,an in-situ measurement was carried out,where three eddy current displacement sensors were arranged on the same axis to monitor the spokes of the ring gear,the ring gear teeth,and the pinion gear teeth.The micro-motion of the ring gear was clar

关 键 词：齿轮泵 原位测量 微动 齿圈 内啮合 高转速 

分 类 号：TH137[机械工程—机械制造及自动化]