套圈整体抛磨的EDEM-ADAMS耦合数值模拟和试验

EDEM-ADAMS Coupling Numerical Simulation and Experiment for Overall Grinding of Rings

针对航空发动机主轴轴承套圈各表面需多次加工且加工均匀性较差的问题,提出了一种浮动装夹、摩擦驱动、水平限位的整体抛磨方法。利用EDEM与ADAMS耦合仿真,分析不同介质装入量和容器转速下介质作用于套圈各表面的法向力,引入法向力分布离散系数评价套圈各表面法向力分布均匀性。仿真结果表明:当介质装入量小于60%时,套圈各表面法向力离散系数均较大;当介质装入量为70%~80%,容器转速高于32 r/min时,套圈各表面法向力离散系数较小。搭建试验平台进行套圈抛磨加工试验,根据仿真结果选取装入量为80%,转速为60 r/min,试验结果表明:套圈各表面粗糙度值均降低且差异减小,证明了该抛磨方法可实现套圈的整体抛磨。

To solve the problem of multiple processing and poor processing uniformity of each surface of aero-engine main shaft bearing rings,an overall grinding method with floating clamp,friction drive and horizontal limit is proposed.The coupling simulation of EDEM and ADAMS is used to analyze the normal force on each surface of the rings under different media filling amounts and vessel rotation speeds,and the dispersion coefficient of normal force distribution is introduced to evaluate the distribution uniformity of normal force on each surface of the rings.The simulation results show that:when the media filling amount is less than 60%,the dispersion coefficient of normal force on each surface of the rings is larger;when the medium filling amount is 70%~80%and the vessel rotation speed is higher than 32 r/min,the dispersion coefficient of normal force on each surface of the rings is small.Finally,a test platform is built for grinding experiment of the rings.According to simulation results,the filling amount of 80%and the rotational speed of 60 r/min are selected.The test results show that the roughness values of each surface of the rings are reduced and the differences are reduced,proving that the grinding method can realize the overall grinding of the rings.