Abstract
In order to more accurately calculate the film stiffness of angular contact ball bearing, it is necessary to establish the film stiffness calculation model that is consistent with reality. The frictional heat exists in high-speed ball bearings, and can impact on oil film thickness and stiffness. The calculation model of film stiffness of an angular contact ball bearing taking account of the effects of viscous heating was proposed based on the elastohydrodynamic lubrication theory. The central film thickness and film stiffness have been determined. An example was calculated with this derived equation and the result was compared with that given in other literatures. The calculation results show that the central film thickness decreases and the film stiffness increases when friction heating are considered.
Highlights
As the key component of rotating machinery, bearingrotor system plays a more and more important role in the industrial field
The support stiffness of a bearing has a great influence on the precision and dynamics performance of rotating machinery
Wang [1] calculated the contact stiffness and synthesizing stiffness of angular contact ball bearing, which included the centrifuge displacement of the inner raceway
Summary
As the key component of rotating machinery, bearingrotor system plays a more and more important role in the industrial field. The support stiffness of a bearing has a great influence on the precision and dynamics performance of rotating machinery. To calculate the stiffness of bearing considering thermal effects, it is necessary to analyze the actual working conditions of bearing and the detailed loading parameters, including the load, the speed, the lubricating film thickness and the viscosity, and so on. The existence of oil film and its impact on the stiffness are ignored, and the contact between rolling elements and raceways is regarded as pure Hertz contact by approximate method. Considering film thickness, the axial stiffness formula of tapered roller bearing was derived, and explained that the existence of oil film had significant impact on bearing stiffness by using an example [4,5,6]. Koye and Winer [7] compared their optical film measurement and the calculated film thickness by
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
