摘要
轴向柱塞泵在运行过程中,其柱塞腔内压力的变化易使缸体和主轴花键碰撞时产生应力集中现象,加剧齿面的微动磨损。为了延长其花键的使用寿命,结合有限元法和Archard模型,对柱塞泵缸体和主轴花键抗磨损设计进行了研究。首先利用有限元法建立了轴向柱塞泵缸体-主轴花键碰撞有限元模型;然后提出一种新的渐开线花键副修形方法,对比传统的齿向修形方法,对花键副修形前后的接触特性进行分析;最后结合Archard模型对花键副修形前后的齿面微动磨损进行预测和对比。结果表明:对花键齿面进行适当的修形后,其接触时的应力集中现象有所缓解,齿面的最大接触应力有所减小;四种修形法都可以降低花键两端的齿面微动磨损,精准齿面修形法的修形效果比传统的齿向修形法好一些。研究结果对柱塞泵花键运行的可靠性和抗磨损设计有一定的指导意义。
During the operations of an axial piston pump,the changes in pressure inside the piston chamber might easily cause stress concentration when the contact of the spline pair between the cylinder and shaft of piston pumps,exacerbating the fretting wear of the tooth surfaces.In order to extend the service life of the splines,finite element method and Archard model were combined to study the wear resistance design of the spline pair between the cylinder and shaft of piston pumps.Firstly,a finite element contact model of the spline pair between the cylinder and shaft of piston pumps was developed using the finite element method.Secondly,a new method for modifying involute spline pairs was proposed,and compared with traditional tooth profile modification methods,the contact characteristics of spline pairs before and after modification were analyzed.Finally,the Archard model was used to predict and compare the fretting wear of the tooth surfaces before and after the modification of the spline pair.The results show that after appropriate modification of the spline tooth surfaces,the stress concentration phenomenon during contact is alleviated,and the maximum contact stress of the tooth surfaces is reduced.All four modification methods may reduce the fretting wear of the tooth surfaces at both ends of the spline,and the precise tooth surface modification method has a better modification effectiveness than the traditional tooth profile modification method.The results have certain guiding significance for the reliability and wear resistance design of piston pump spline operations.
作者
叶绍干
陈天星
陈鼎
苗克非
赵守军
刘会祥
YE Shaogan;CHEN Tianxing;CHEN Ding;MIAO Kefei;ZHAO Shoujun;LIU Huixiang(Pen-Tung Sah Institute of Micron-Nano Science and Technology,Xiamen University,Xiamen,Fujian,361021;School of Mechanical and Automotive Engineering,Xiamen University of Technology,Xiamen,Fujian,361024;Beijing Institute of Precision Mechatronics and Controls,Beijing,100076)
出处
《中国机械工程》
北大核心
2025年第8期1767-1773,1783,共8页
China Mechanical Engineering
基金
国家自然科学基金(52175062)
福建省自然科学基金(2021J01049、2021J011202)
航空科学基金(20220007068002)。
关键词
轴向柱塞泵
有限元法
齿向修形
接触特性
微动磨损
axial piston pump
finite element method
tooth profile modification
contact characteristics
fretting wear
