摘要
保持架是滚动轴承的关键构件,然而当高速滚动轴承保持架的运动采用外圈引导时,保持架和外圈之间的接触碰撞会产生较大的振动。为了减小轴承振动,提出了保持架由外圈和滚动体组合引导的引导方式,设计了实现这种方式的外锁口兜孔结构保持架。该保持架的兜孔结构为:靠近兜孔外侧的部分为球形,且兜孔外端口的直径小于滚珠直径;靠近兜孔内侧的部分为圆柱形,且兜孔内端口的直径大于滚珠直径。建立了外锁口兜孔结构保持架由外圈和滚动体组合引导的力学模型,分别在不同转速、偏移量和接触状态条件下,比较分析了外锁口兜孔结构保持架与直兜孔结构保持架受到的沿其偏移反方向作用力的大小及规律。采用车削方法加工了外锁口兜孔结构保持架,通过试验验证了其减小轴承振动的作用。
Cage is a key component of a rolling bearing, and when a high-speed rolling bearing’s cage motion is guided by its outer race, contact and collision between cage and outer race can cause bearing’s larger vibration. Here, to reduce bearing vibration, a new cage guide mode was proposed, the cage motion was guided by the combination of outer race and balls. A cage with outer lock mouth pocket hole structure was designed to realize this guide mode. The cage’s pocket hole structure was composed of two parts, the part near the outside of the pocket hole was spherical, and the diameter of the outer port of the pocket hole was smaller than that of balls;the part near the inside of the pocket hole was cylindrical, and the diameter of the inner port of the pocket hole was larger than that of balls. Then, the mechanical model for motion of a cage with outer lock mouth pocket hole structure guided by combination of outer race and balls was established. Under conditions of different rotating speeds, offsets and contact states, magnitude and variation law of forces acting on a cage with outer lock mouth pocket hole structure and one with straight pocket hole structure, respectively in the opposite direction of their offsets were analyzed contrastively. The cage with outer lock mouth pocket hole structure was machined with the lathe cutting method, and its reducing bearing vibration effect was verified with tests.
作者
刘文涛
张旭
王守仁
张云
王高琦
LIU Wentao;ZHANG Xu;WANG Shouren;ZHANG Yun;WANG Gaoqi(College of Mechanical Engineering,University of Jinan,Jinan 250022,China;School of Mechanical Engineering,Tsinghua University,Beijing 100084,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2020年第21期24-33,共10页
Journal of Vibration and Shock
基金
国家自然科学基金(51605190)
泰山学者专项基金(2016-2020)。
关键词
滚动轴承
保持架
组合引导
减振
力学模型
rolling bearing
cage
combined guide
vibration reduction
mechanical model
