采用弹性连接降低滚珠丝杠副中滚珠对返向器的冲击  

Using elastic joint to minimize the impact caused by the ball to the reverse unit of ball screw pair

作　　者：张佐营[1] 赵越[2] 李志[1] 

机构地区：[1]徐州工程学院机电工程学院,江苏徐州221008 [2]东南大学自动化学院,江苏南京211189

出　　处：《机械设计》2010年第5期28-30,共3页Journal of Machine Design

基　　金：国家自然科学基金资助项目(50675124);徐州工程学院培育资助项目(XKY2008317)

摘　　要：建立了滚珠丝杠副中返向器与螺母弹性连接时滚珠与返向器碰撞的模型,推导了连接刚度处于两种极限状态下最大碰撞力的公式,讨论了连接刚度对碰撞力的影响。研究表明,连接刚度较大时,滚珠对返向器的碰撞力也较大,连接刚度对碰撞力的影响程度受滚珠与返向器质量比的影响,该质量比较大时,连接刚度对碰撞力的影响比较明显。振动和噪声的测试结果表明,在返向器与螺母之间采用弹性连接可以有效降低滚珠对返向器的冲击,提高滚珠丝杠副的性能。A model that ball collides with the reverse unit when the reverse unit in the ball screw pair is elastically connecting with the nut was established, the formula of maximum impact under the state of two different limits was deduced, and the influence on the impact by the connecting rigidity was discussed. The research has shown that the impact applied to the reverse unit by the ball be- ＂comes bigger as the connecting rigidity becomes bigger, the degree of influence on the impact by the connecting rigidity will be affected by the mass ratio between ball and reverse unit. When this mass ratio is much bigger, the influence on the impact by the connecting rigidity becomes obvious. The vibration and noise test result has shown that the impact to the reverse unit by the ball can be reduced effectively if the elastic connection is used between reserve unit and nut, improving the performance of the ball screw pair.

关 键 词：碰撞力 滚珠丝杠副 弹性连接 赫兹模型 

分 类 号：TH132.1[机械工程—机械制造及自动化] O313.4[理学—一般力学与力学基础]