行星滚柱丝杠副负载对摩擦力矩的影响  

Influence of Load on Friction Moment in Roller Screw

作　　者：付永领[1] 甘发金 祁晓野[1] 王德义[1] 

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100191

出　　处：《机械传动》2016年第5期116-119,共4页Journal of Mechanical Transmission

摘　　要：首先介绍了滚柱丝杠副的接触特点,基于赫兹理论和滚柱丝杠副载荷分布规律,分析滚柱丝杠副摩擦力矩的理论模型。模型显示,在影响摩擦力矩的因素中,接触椭圆长(短)半轴和滑动摩擦因数都受外界负载影响。随后分别讨论了滚柱丝杠副的接触椭圆长(短)半轴和滑动摩擦因数随外界负载的变化规律,最后得出了滚柱丝杠副负载对其摩擦力矩的影响规律,并与将摩擦因数设为常数的分析结果对比。研究结果显示,负载相对于额定负载每增大10%时,滚柱丝杠副摩擦力矩相应增加16%;当负载大于额定负载的70%时,滑动摩擦因数随负载的变化对摩擦力矩的影响不可忽略。Firstly,the contact characteristic in the roller screw is introduced. Based on the Hertzian contact theory and the load distribution regulation of the roller screw,the model of friction moment is analyzed. The friction moment model shows that its influencing factors included in the half lengths of the major（ minor） of the contact ellipse and the sliding friction coefficient,on which the load of the roller screw has impact. The regularity between the load and the half lengths of the major（ minor） of the contact ellipse and the sliding friction coefficient values are discussed respectively. Finally,the relationship between the friction moment and the load of roller screw is obtained,which is compared to the results with the situation that regarding the sliding friction coefficient as constant. The result shows that,as the load increases 10% of rated load,the friction moment of roller screw increases correspondingly 16%. Furthermore,the consequence presents when the load larger than70% of rated load,the effects of the sliding friction coefficient changing with various load on the friction moment could not be neglected.

关 键 词：滚柱丝杠副 摩擦力矩 负载 滑动摩擦因数 

分 类 号：TH132[机械工程—机械制造及自动化]