Volume 35 Issue 10
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LIU Lu, HUO Shuai, ZHENG Kai. Analysis of roller bearing cage broken under high DN value[J]. Journal of Aerospace Power, 2020, 35(10): 2115-2122. doi: 10.13224/j.cnki.jasp.2020.10.011
Citation: LIU Lu, HUO Shuai, ZHENG Kai. Analysis of roller bearing cage broken under high DN value[J]. Journal of Aerospace Power, 2020, 35(10): 2115-2122. doi: 10.13224/j.cnki.jasp.2020.10.011
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Analysis of roller bearing cage broken under high DN value

doi: 10.13224/j.cnki.jasp.2020.10.011

  • Key Laboratory of Power Transmission Technology on Aero-Engine,Shenyang Engine Research Institute,Aero Engine Corporation of China,Shenyang 110015,China

  • Received Date: 2019-11-08
  • Publish Date: 2020-10-28
    Abstract
  • The failure mechanism of high DN value (bearing inner diameter multiply speed) bearing cage was analyzed. The results of roller bearing cage broken under the theory of ultra-high cycle fatigue showed that the method of designing of cage based on high cycle fatigue didn’t apply to high DN value cage. The stress causing fracture within over-long design life was far below fatigue limit of the material. The centrifugal stress caused by high speed contributed a lot to high DN value bearing cage fracture, and the main reason causing cage fracture was attributable to stress concentration because of the small pocket fillet. Therefore increasing pocket fillet and clean-up machining would help avoid cage fracture, and increase reliability of bearings.

     

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