Unpleasant sound measurement technology of noise free bearing

 

 

LIU Guo guang1, CHEN Fang hua2, ZHAO Li ya2, ZHENG Li ping2

 

(1. Naval Aviation in Yanliang District Military Agent′s Room, Xian 710089, China;

 

2. Hangzhou Bearing Test & Research Center Co., Ltd., Hangzhou 310022, China)

 

 

Abstract: Aiming at the automatic vibration measurer which is very effective for abnormal noise detection, but its misjudgment rate is very high when inspect the quality of noise free bearing, so it can′t meet the noise free bearing automatic production. Through the analysis and research of unpleasant sound generation mechanism and vibration characteristics, as well as the existing vibration measuring parameter and the measurement technology of vibration peak, then the inapplicability of existing automatic vibration measurer which used for the judgment of noise free bearing′s unpleasant sound was explained; The vibration measuring parameter of unpleasant sound was expounded and proved, and the vibration peak measurement technology which for the purpose of the control of unpleasant sound was put forward, at the end experimental verification was given. The results show that the crest factor is the appropriate vibration measuring parameter of noise free bearing′s unpleasant sound, and mean value of a load period should be used to judge unpleasant sound, it has high coincidence rate with the evaluation result of human ear hearing.

 

Key words: low noise bearing; noise free bearing; abnormal noise; unpleasant sound; measuring technique