行星滚柱丝杠动态摩擦力矩和传动效率分析

针对行星滚柱丝杠摩擦力矩和传动效率随丝杆转速变化而变化，考虑润滑油黏滞、滚柱自旋滑动和螺纹接触点差动滑动产生的摩擦阻力，基于拉格朗日方法建立了行星滚柱丝杠机构动力学模型，计算了其摩擦力矩和传动效率，分析了负载和丝杆角加速度对机构动态摩擦力矩、瞬态传动效率和综合传动效率的影响. 研究结果表明：行星滚柱丝杠摩擦力矩随螺纹接触点相对滑动速度增大而增大；非稳态运行阶段润滑油黏滞和自旋滑动是产生摩擦力矩的主要因素；行星滚柱丝杠在大载荷运行时传动效率较高，丝杆加速时间越短其综合传动效率越高.

Aiming at the variation of friction torque and transmission efficiency of planetary roller screws with the rotational speed of the lead screw, this study establishes the dynamic model of the planetary roller screw mechanism based on the Lagrange method, considering the friction resistance caused by the viscous effect of lubricating oil, roller spin slip and differential slip at thread contact points. The friction torque and transmission efficiency of the mechanism are calculated, and the influences of load and lead screw angular acceleration on the dynamic friction torque, transient transmission efficiency and comprehensive transmission efficiency are analyzed. The research results indicate that: the friction torque of planetary roller screws increases with the rise of relative sliding velocity at thread contact points; during the unsteady operation phase, the viscous resistance of lubricating oil and spin slip are the main sources of friction torque; the planetary roller screw has higher transmission efficiency under heavy loads, and the shorter the acceleration time of the lead screw, the higher its comprehensive transmission efficiency.

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背景概述

该数据集研究行星滚柱丝杠的动态摩擦力矩和传动效率，基于拉格朗日方法建立动力学模型，分析负载、丝杆角加速度等因素的影响。结果表明，摩擦力矩随相对滑动速度增大，非稳态阶段润滑油黏滞和自旋滑动是关键因素，大载荷和短加速时间可提升传动效率。