Application of cage guided by combined action of outer race and balls in bearing vibration reduction

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (21) : 24-33.

LIU Wentao1, ZHANG Xu1, WANG Shouren1, ZHANG Yun2, WANG Gaoqi1

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Abstract

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.

Key words

rolling bearing / cage / combined guide / vibration reduction / mechanical model

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LIU Wentao1, ZHANG Xu1, WANG Shouren1, ZHANG Yun2, WANG Gaoqi1. Application of cage guided by combined action of outer race and balls in bearing vibration reduction[J]. Journal of Vibration and Shock, 2020, 39(21): 24-33

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