精密滚珠丝杠副的润滑问题研究  

Study on the Lubrication of the Precision Ball Screw Mechanism

作　　者：张佐营[1] 张磊[1] 姜洪奎[2] 

机构地区：[1]徐州工程学院江苏省大型工程装备检测与控制重点建设实验室,江苏徐州221018 [2]山东建筑大学机电学院,山东济南250100

出　　处：《机械传动》2015年第11期22-26,共5页Journal of Mechanical Transmission

基　　金：国家自然科学基金(51105232);江苏省高校自然基金(14KJB460030)

摘　　要：首先对滚珠丝杠副的两种通用润滑方式的润滑效果进行了分析计算研究:对于滴油润滑,基于Hamrock-Dowson公式,计算分析了最小油膜厚度随丝杠转速的变化情况,使用膜厚比计算判定,滚珠丝杠副在该方式下的润滑属于边界润滑;对于脂润滑,通过研究滚珠对丝杠的运动及几何关系,计算分析了滚珠速度随丝杠转速的变化情况,计算结果表明,滚珠丝杠副在该润滑方式下易导致较大温升。为改进上述两种润滑方式的不足,提出一种动态涂覆式脂润滑方式以适应高速滚珠丝杠副的润滑需要,并通过摩擦力矩平稳性实验和温升实验研究,证明了所提出的动态涂覆式脂润滑方式的润滑效果要优于滴油润滑。The lubrication effects of two types of universal lubrication methods for ball screw mechanism are firstly discussed.For lubrication in oil,the variation situation of the thinnest lubricating oil film thickness vary with the ball screw rotation is figured out according to the Hamrock-Dowson expression and the fact that the ball screw always runs on conditions of boundary lubrication is identified by the calculation of the film thickness ratio.For lubrication in grease,the fluctuation curve of the ball speed responds to the ball screw rotation is figured out through the analysis of their mutual motion and geometric relationship.The curve demonstrates that using the grease to lubricate the ball screw mechanism with high rotation rate will cause higher temperature rise.To overcome the above two shortages,a dynamic grease coating lubrication method is proposed.Lastly,a friction torque stabilization test and a temperature rise test are conducted to prove the superiority of the proposed method.

关 键 词：滚珠丝杠副 滴油润滑 脂润滑 动态涂覆式脂润滑 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]