导航

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2021, Vol. 42 ›› Issue (7): 424135-424135.doi: 10.7527/S1000-6893.2020.24135

• Material Engineering and Mechanical Manufacturing • Previous Articles     Next Articles

High-speed dynamic performance of cylindrical roller bearing with V-shape pocket

LIU Yanbin1,2, DENG Zenghui1, SANG Deyu1   

  1. 1. School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471003, China;
    2. Collaborative Innovation Center of Machinery Equipment Advanced Manufacturing, Henan Province, Henan University of Science and Technology, Luoyang 471003, China
  • Received:2020-04-24 Revised:2020-05-18 Published:2020-07-17
  • Supported by:
    Natural Science Foundation of Henan Province (182300410273)

Abstract: Cage slip and dynamic instability present challenges to the mainshaft cylindrical roller bearing of aero-engines. This paper proposes a novel cylindrical roller bearing with a V-shape pocket, and studies its cage slip and stability. Using the Hertz contact theory, the elastohydrodynamic and hydrodynamic lubrication formulas, and the Newton-Euler dynamics theory, we build a dynamics model of the bearing under radial rigid loads. Subsequently, based on the variable-step Runge-Kutta numerical integration method, the dynamics simulation of the bearing is conducted, the effects of the geometric parameters of the V-shape pocket on the cage slip and stability are discussed, and the cage slip characteristics, the cage stability and the roller-pocket collision characteristics of the bearing with the optimized pocket are analyzed at various high rotational speeds. The results show that the influences of the geometric parameters of the V-shape pocket on the cage slip and stability are remarkable; compared with the general bearing, within the rotational speed range of 30 000~60 000 r/min, the cage slip ratio, the cage whirl radius, and the force amplitude and frequency of the roller-pocket local collisions of the optimized bearing are significantly lower or smaller.

Key words: cylindrical roller bearings, cage pocket, dynamics models, cage slip, cage stability

CLC Number: