PWG型差动丝杠摩擦转矩分析与效率求解  

The analysis of friction torque and calculation of efficiency of PWG planetary roller screw

作　　者：徐强[1] 王水铭 赵国平[1] 黄玉平[1] 

机构地区：[1]北京精密机电控制设备研究所研发中心,北京100076

出　　处：《现代制造工程》2016年第5期138-142,62,共6页Modern Manufacturing Engineering

基　　金：国家863高新技术研究项目(2012AA70607051)

摘　　要：将螺旋空间啮合模型应用到PWG型差动式行星滚柱丝杠的啮合分析中,综合考虑由滚柱与丝杆初始啮合点偏置引起的啮合滑动和在滚柱与螺母接触区域产生的几何滑动等因素对丝杠摩擦转矩的影响。基于此,建立了摩擦转矩分析模型与滚柱稳态平衡方程,给出了PWG型丝杠效率的求解方法。对某一规格PWG型丝杠在不同载荷下的效率进行了求解与试验,模型计算结果与试验数据均表明:随着载荷的增加,PWG型丝杠的效率呈下降趋势。同时通过与试验数据的对比验证了分析模型与求解方法的可行性。The helical meshing model is used to analyze the meshing of PWG planetary roller screw. In consideration that the meshing slippage at the screw-roller and the geometrical slippage at the nut-roller influence on the friction force and torque of the PWG, the analysis model of steady equilibrium is developed. Base on the model, the balance equation of roller is founded and the method of the torque and efficiency is presented. Finally, the steady efficiency of different axial load is calculated. Compared to test results,it is proved that the method is beneficial to PWG design.

关 键 词：行星滚柱丝杠 差动滚柱丝杠 螺旋升角 传动导程 效率 

分 类 号：TH132[机械工程—机械制造及自动化]