球型支座转动摩擦系数测试研究与分析

论述了球型支座实测转动摩擦系数与平面摩擦系数出现较大偏移的现象，总结了以往对该现象的常见解释。基于现行球型支座转动性能测试试验方法，通过深入分析转动球型支座时支座内部各个零件的运动状态与相对运动关系，结合机械结构原理提出了球型支座转动摩擦系数的新理论，给出了不同于现行通用球型支座转动摩擦系数测算的新理论公式，并进行了仿真计算与实体试验的双重验证。该新理论对深入理解球型支座转动结构原理，球型支座准确的检验及良好的应用都具有非常重要的意义。

Test of Pivoting Friction Coefficient of Spherical Bearings

The article elaborates on the phenomenon of relatively large deviation between the measured coefficient of pivoting friction and that of flat friction of spherical bearings as well as summarizes common explanations of the phenomenon. Drawing upon the experimental methods for the test of pivoting performance of current spherical bearings and in-depth analysis of the kinestate of the various parts within the bearing as well as the relation of relative motion between them while pivoting the spherical bearing, the article puts forward a new theory of the coefficient of pivoting friction of spherical bearings by combing the principle of mechanical structure and a new theoretical formula different from present ones used to calculate the coefficient of pivoting friction of spherical bearings. Additionally, a two-factor authentication of simulating calculation and practical testing is conducted. The new theory is of great significance for thorough comprehension of the elements of the pivoting structure, the accurate examination and sound application of spherical bearings.