Noise of Ball Bearing : 5th Report, Generating Mechanism of Noise

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  • 玉軸受の騒音 : 第5報, 音の発生機構
  • タマジクウケ ノ ソウオン オト ノ ハッセイ キコウ 5

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Abstract

Although the generating mechanism of the ball bearing noise has been discussed frequently, it has not been made clear till the present time. So, the author analyzed the experimental results on the noise of the ball bearing, made some experiments, and was able to make clear the generating mechanism of the ball bearing noise as follows : - There is a circumferential waviness, of which height is continuously with number of wave-length to the circumference, at the race and the ball surfaces of the ball bearing. Then, as soon as the ball bearing rotates, a minute alternating change in the normal spring, which is due to the elastic contact between the race rings and the ball, occurs. Therefore, a vibrating force imposes on the race rings, they generate their bending natural vibrations ; these vibrations are transmitted to the air, and the ball bearing noise generates.

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