行星滚柱丝杠副额定静载荷计算方法对比分析  

Comparison and Analysis of Calculation Methods for Rated Static Load of Planetary Roller Screw Mechanism

作　　者：康新泓 魏沛堂[1] 胡瑞 周鹏亮 杜雪松[1] 朱才朝[1] Kang Xinhong;Wei Peitang;Hu Rui;Zhou Pengliang;Du Xuesong;Zhu Caichao(State Key Laboratory of Mechanical Transmissions,Chongqing University,Chongqing 400044,China;Guizhou Qunjian Precision Machinery Co.,Ltd.,Zunyi 563000,China)

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044 [2]贵州群建精密机械有限公司,贵州遵义563000

出　　处：《机械传动》2022年第11期1-9,共9页Journal of Mechanical Transmission

基　　金：国家重点研发计划项目(2020YFB2008200)。

摘　　要：行星滚柱丝杠副(Planetary roller screw mechanism,PRSM)是一种新型重载传动装置。额定静载荷是反映其承载能力的关键指标。针对目前PRSM额定静载荷计算方法不统一、计算结果差异大等问题,阐述了以滚珠丝杠、滚动轴承、屈服极限和弹塑性线性强化为基础的4种PRSM额定静载荷计算方法并建立相应计算模型,对比分析了结构参数对4种方法所得额定静载荷的影响规律;建立了PRSM弹塑性接触有限元分析模型,对4种计算方法的准确性进行了对比验证;提出了一种基于滚动轴承标准改进的PRSM额定静载荷计算方法。结果表明,以滚动轴承为基础的额定静载荷计算结果与有限元结果符合较好;所提出的改进计算方法,使其计算误差平均值从17.03%降至8.90%,能够较为精确地计算PRSM的额定静载荷,为行星滚柱丝杠副的设计、选型等提供了理论支撑。Planetary roller screw mechanism(PRSM)is a new type of heavy duty transmission devices.Rated static load is a key indicator to reflect its carrying capacity.Aiming at the problems of inconsistent calcu⁃lation methods of PRSM rated static load and large difference between calculation results at present,four calcu⁃lation methods of PRSM rated static load based on ball screw,rolling bearings,yield limit and elastic-plastic lin⁃ear strengthening are expounded and corresponding calculation models are established;the PRSM elastic-plas⁃tic finite element contact analysis model is established,and the accuracy of the four calculation methods is com⁃pared and verified;an improved PRSM rated static load calculation method based on rolling bearing standards is proposed.The results show that the calculated results of the rated static load based on rolling bearings agree well with the finite element results.The improved calculation method reduces the average error from 17.03%to 8.90%,which can accurately calculate the rated static load of PRSM.It provides theoretical support for the de⁃sign and selection of planetary roller screw mechanism.

关 键 词：行星滚柱丝杠副 额定静载荷 HERTZ接触 弹塑性力学 

分 类 号：TH132[机械工程—机械制造及自动化]