The Structural Factors Causing the Deviation of Measured Pivoting COF of Spherical Bearings from Assignment

Abstract

This paper expounds on the deviation of measured coefficient of friction from the assignment when the friction pair of the spherical bearing changes from plane structure into spherical structure, and summarizes the common explanation of such phenomenon of the past. Through the analysis on the methods of the measurement test for the coefficient of spherical pivoting friction and an in-depth analysis on the relation between the motion state and relative motion of the internal parts of the spherical bearing generated by rotating it based on this method, a new calculation formula for the coefficient of pivoting friction of the spherical bearing is put forward, which is of great significance to in-depth understanding of the structural principles of spherical bearing, precise structural design and sound bearing applications.