Designs of low frictional coefficients for joint bearings by inlaying graphites and liquid spraying of MoS2

Abstract

Purpose The purpose of this paper is to solve the problem of joint bearings that cannot work in high temperature because of their high frictional coefficients. Design/methodology/approach Two methods of inlaying graphites and liquid spraying of MoS2 are designed. The arrangement of graphites is shown and its frictional coefficients (COFs) are discussed. MoS2 coating is deposited by liquid spraying. The ingredients of liquid spraying of MoS2 are illustrated. Stresses, structure deformations and fatigue life are analyzed by finite element analysis. Findings Results show that both two designed methods can decrease COFs effectively. All stresses are in the limit of the maximum permissible stresses. The new designed bearings can be safety worked in sealed and high temperature environment which are proved by fatigue analyses. Practical implications Two new designs can help joint bearings work in nuclear plants because of their low COFs and litter wear. The new designs can improve bearings life. Originality/value Two methods of decreasing COFs of joint bearings are designed in this paper. The technologies are illustrated. The proper scopes of applications of two designed methods are discussed.