高载荷下滚珠丝杠的动力学特性分析  

Dynamics Characteristic Analysis of Ball Screw Under High Load

作　　者：杨武旭 范元勋[1] 刘明辉 董辉立 Yang Wuxu;Fan Yuanxun;Liu Minghui;Dong Huili(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Beijing Research Institute of Precise Mechatronic Controls,China Academy of Launch Vehicle Technology,Beijing 100076,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094 [2]中国运载火箭技术研究院北京精密机电控制设备研究所,北京100076

出　　处：《机械传动》2020年第3期131-136,共6页Journal of Mechanical Transmission

摘　　要：为了研究某型号滚珠丝杠受角振动驱动速度和高载荷加载时的动力学特性,基于显式时间积分方法,建立了考虑滚珠出入反向器过程的柔体动力学模型与对照模型。两者动力学特性的对比结果表明,高载荷下运行的滚珠丝杠有一定几率出现瞬间卡滞现象,该现象源于滚道内滚珠与反向器内滚珠的碰撞及滚珠出入反向器时的滚珠法向力加载与卸载等过程的共同作用。研究结果为以提高滚珠丝杠动态性能为目标的优化设计提供了参考。To research the dynamics characteristic of high load ball screw under angular vibration driving velocity,a flexible body dynamic model and a control model considering the process of ball entering and leaving the re-circulating mechanism are built based on explicit time integration.The comparison of dynamic responses and other characteristics shows that the ball screw under high load has a certain probability of transient stuck originated from the impact between the balls in the groove and the balls in the deflector,this phenomenon stems from the collision between the ball in the raceway and the ball in the reverser,and the common action of the nor⁃mal force loading and unloading when balls enter and leave the re-circulating mechanism,etc.This research provides a reference for the optimization design aiming at enhancing the dynamic performance of ball screw.

关 键 词：滚珠丝杠 有限元 卡滞 反向器 动力学 

分 类 号：TH113[机械工程—机械设计及理论]