|Table of Contents|

Dynamic behavior analysis of ball bearings before and after cage lintel fracture(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2023年06期
Page:
21-30
Research Field:
目次
Publishing date:

Info

Title:
Dynamic behavior analysis of ball bearings before and after cage lintel fracture
Author(s):
FANG Xiaohui1;  XU Zili1;  WANG Jun2;  HUANG Jinping2
1.State key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an 710049, China; 2.Science and Technology on Liquid Rocket Engine Laboratory, Xi'an Aerospace Propulsion Institute, Xi'an 710100, China
Keywords:
turbo-pump ball bearing;  cage fracture;  explicit finite element;  slip rate;  instantaneous force
PACS:
V431
DOI:
-
Abstract:
The fracture of the ball bearing cage lintel in rocket turbo-pump occurs from time to time and even affects the normal operation of the turbo-pump system.In order to predict the fracture failure of ball bearing cage timely and effectively, considering the friction and contact effects between the fracture cage, ball bearing and guide ring, the motion differential equation of fracture cage was established and solved by explicit finite element method.The dynamic behavior of a turbo-pump ball bearing before and after the lintel fracture were calculated and compared, and the effects of cage lintel fracture on instantaneous force, slip rate, wear and maximum PV value were studied.The results show that the fracture of the cage lintel significantly increases the force between the cage and the outer ring, and the maximum instantaneous force increases by 29.81.The slip rate of cage, the wear of cage guide surface and the maximum PV value increase greatly.There is a large instantaneous impact force between the ball bearings at the fracture position of the cage lintel, and the ball has obvious slippage, with a slip rate of 14.06.

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