Analysis of Dynamic Friction Torque and Transmission Efficiency of Planetary Roller Screw
行星滚柱丝杠动态摩擦力矩和传动效率分析
作者: XIE ZhijieZHANG ChuanweiXUE QiheWANG LiqinGU LeMA XinxinWANG FeiMIIT Key Laboratory of Aerospace Bearing Technology and Equipment, Harbin Institute of TechnologyState Key Laboratory of Robotics and System, Harbin Institute of Technology
刊名: Tribology, 2019(04), pp.489-496
中文刊名: 摩擦学学报, 2019(04), pp.489-496
来源数据库: CJFDTEMP_U
关键词: planetary roller screwunsteady state operationdynamic friction torquetransient transmission efficiencyoverall transmission efficiency
中文关键词: 行星滚柱丝杠非稳态运行动态摩擦力矩瞬态传动效率综合传动效率
英文摘要: As the friction torque and transmission efficiency of planetary roller screw changed with the rotation speed of screw, the dynamic model of planetary roller screw was established based on the Lagrange method considering the frictional resistance due to the lubricating oil viscosity, the roller spin sliding and the differential sliding of the thread contact point. And the friction torque and transmission efficiency were calculated. The influences of load and angle acceleration of screw on the dynamic friction torque, transient transmission efficiency and overall transmission efficiency of the mechanism were analyzed. The results show that the friction torque of the planetary roller screw increased with the relative sliding speed of the thread contact point, and the viscous of the...
中文摘要: 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.
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