Contact Stress and Radial Stiffness of a Cylindrical Roller Bearing With Corrected Roller Generator

Abstract

A method has been developed to study the radial stiffness of a cylindrical roller bearing with corrected roller generator. First, the finite-length contact question of roller-race contact was solved by cutting contact surface into slices and considering the influences among slices by a flexibility coefficient matrix, which was more accurate than the traditional method. Further, the more precise load-approach function of the contact of race and roller with corrected generator was determined. Then, the radial stiffness of a cylindrical roller bearing has been derived by coupling this load-approach function into a complete bearing mechanical model. Results show that the corrected roller generator has a great influence on the bearing radial stiffness. The maximum stiffness difference among the cases of straight and crowned generators is 28.7%. The bearing radial stiffness decreases rapidly with the rise of profile maximum deviation hmax. It is worthy noting that there is a sudden change of stiffness with the adding of load when the bearing is with clearance.

Bulletin of the Polish Academy of Sciences: Technical Sciences

“…Studies on rolling element bearings were performed by Guo and Parker [1], Chen and Wang [2]. They investigated the non-Fig.…”

The refined strength calculation and optimization of the inner geometry of cylindrical bearing units

“…A simplified method of determining the dependence of the contact stress and radial rigidity of a roller bearing on the convex shape of the roller surface was constructed in article [15]. A mathematical model is given, which makes it possible to solve the roller-raceway contact problem analytically by the method of finite segments.…”

Devising an engineering procedure for calculating the ductility of a roller bearing under a no-central radial load

“…To carry out an analytical study into the impact of the profile of a cylindrical roller on the radial ductility of a bearing, paper [7] constructed a method for cutting the contact zone by layers. However, the proposed procedure for calculating bearing ductility is cumbersome and rather complicated.…”

“…An analysis of papers [1][2][3][4][5][6][7][8][9][10] reveals that known theoretical approaches to calculating the ductility of rolling bearings include rather complicated analytical dependences and require cumbersome computation. At the same time, the authors do not take into consideration the patterns in bearing operation associated with the causes and consequences of forming the misalignment of rings.…”