行星滚柱丝杠副弹塑性接触分析  

Elastic-plastic Contact Analysis of the Planetary Roller Screw Mechanism

作　　者：姚琴[1] 吴立言[1] 刘更[1] 马尚君[1] 佟瑞庭[1] 

机构地区：[1]西北工业大学陕西省机电传动与控制工程实验室,陕西西安710072

出　　处：《机械传动》2016年第11期106-110,116,共6页Journal of Mechanical Transmission

基　　金：国家自然科学基金(51275423);教育部高等学校博士学科点专项科研基金(20126102110019);中国博士后科学基金(2014M552483)

摘　　要：针对行星滚柱丝杠副弹塑性接触问题,以赫兹接触理论及弹塑性力学为基础,建立了丝杠与滚柱单对接触模型,得出一种判断行星滚柱丝杠副是否进入屈服状态的方法。其次,基于有限元法建立其弹塑性接触的数值模型,分析了载荷与行星滚柱丝杠副弹塑性接触变形的关系。进一步的计算表明,滚柱先于丝杠屈服,且在塑性变形量较小的载荷范围内,运用赫兹公式计算接触应力仍然可行。通过对行星滚柱丝杠副的弹塑性接触分析,得出其额定静载荷对应的塑性变形量,对未来行星滚柱丝杠副的设计提供了理论依据。Aiming at elastic - plastic contact of planetary roller screw mechanism （ PRSM）, a single contact model between screw and roller is established based on the Hertz contact theory and elastic - plastic mechanics, then a method for judging whether the PRSM has entered the yield state is obtained. Secondly, the nu- merical model of the elastic - plastic contact is built based on the finite element method and the relationship be- tween loads and deformation on the elastic - plastic contact of PRSM is analyzed. Conclusions can be drawn that the roller becomes a yield state prior to the screw through further analysis, and the contact stress calculation method based on the Hertz contact theory is still feasible when the load is under a range of small plastic deform- ation. Through the elastic - plastic contact analysis of PRSM, its plastic deformation corresponding to static load rating is acquired, which provides theoretical roles for future design of PRSM.

关 键 词：行星滚柱丝杠副 弹塑性接触 有限元法 塑性变形 额定静载荷 

分 类 号：TH132[机械工程—机械制造及自动化]