Study on the Thermal Distribution Characteristics of High-Speed and Light-Load Rolling Bearing Considering Skidding

Junning Li,Zhitao Ma,Jiafan Xue

doi:10.3390/app8091593

Abstract

Skidding, which frequently occurs in high-speed rolling bearings, has a significant effect on the thermal distribution and service reliability of the bearings. An improved theoretical model of friction power loss distribution in high-speed and light-load rolling bearings (HSLLRBs) considering skidding is established, and the effects of various operating parameters on the friction power loss are investigated. The results show that the friction power loss of the inner ring and outer ring as well as the total friction power loss of the bearing increase as the slip ratio increases, but that the friction power loss of the cage guide surface and roller oil churning show a reverse trend. In addition, the increase in inner ring speed and kinematic viscosity leads to an increase in bearing friction power loss. The steady and transient temperature field distribution of HSLLRBs is obtained by the finite element method (FEM), and the results show that the inner ring raceway has the highest temperature, whereas the cage has the lowest. The temperature distribution test rig of a full-size roller bearing is constructed, and the influence mechanism of the slip ratio, rotation speed, load, lubrication, and surface topography on the bearing temperature distribution are obtained. The experimental results are consistent with the theoretical results, which also validates the theoretical method.

Highlights

The rolling element bearing is a critical part supporting the rotating components of the mechanical system and provides additional damping to stabilize the system
Palmgren [4] proposed a method for calculating the friction heat generation of a rolling element bearing based on the integral method, which is suitable for medium- and low-speed and sufficient lubrication conditions
Results and Analysis is Analysis the temperature distribution diagram of the bearing obtained with a FLUKE TI450

Summary

Introduction

The rolling element bearing is a critical part supporting the rotating components of the mechanical system and provides additional damping to stabilize the system. Investigated the influences of different traction models on the dynamic behavior of a cylindrical roller bearing under radial loads, and calculated the cage rotational speed for a wide range of rotational speeds and bearing loads. Research on the heating mechanism, heat transfer process, and temperature distribution of bearings is very necessary. Palmgren [4] proposed a method for calculating the friction heat generation of a rolling element bearing based on the integral method, which is suitable for medium- and low-speed and sufficient lubrication conditions. This method underestimates the total friction heat generation of bearings in high-speed working conditions

Methods

Results

Conclusion