作者：李俊南, 张锁怀, 吕超颖, 龚德利

作者单位：上海应用技术大学机械工程学院, 上海 201418

关键词：拉杆转子;静摩擦系数;粗糙度测量;预紧力

摘要：

为探究拉杆转子轮盘接触面间静摩擦系数的变化规律，根据分形接触理论对拉杆转子轮盘结合面的实际接触状态进行理论分析。针对不同粗糙度等级和不同拉杆预紧力影响下的拉杆转子轮盘接触面静摩擦系数进行数值仿真计算和试验研究工作。试验研究发现，静摩擦系数随法向载荷的增大而减小。试验测量轮盘端面的粗糙度，发现粗糙度较小或较大时，静摩擦系数的大小与粗糙度成反比；当粗糙度位于某一范围时，静摩擦系数的大小与粗糙度成正比。但分形接触理论认为，结合面间的静摩擦系数随法向载荷的增大而增大。所以分形接触理论不适用于粗糙度较大、法向力较小的场合，接触面静摩擦系数的机理有待进一步研究，分形接触理论有待完善。

Experimental investigation of roughness and normal loads on the static friction coefficient between the joint interfaces of the rotor plates

LI Junnan, ZHANG Suohuai, LÜ Chaoying, GONG Deli

School of Mechanical Engineering, Shanghai Institute of Technology, Shanghai 201418, China

Abstract: In order to explore the variation law of the static friction coefficient between the joint interfaces of the rod fastening rotor. According to the fractal contacting theory, the analysis of actual contact state between the joint interfaces of the rod fastening rotor has been done. The numerical simulation calculation and experimental research on the static friction coefficient of the contact surface of the tie rod rotor under the influence of different roughness grades and different tie rod preloading forces are carried out. Experimental study results, however, have the opposite conclusion. The roughness of the end of the plates was measured during the test and it was found that as the roughness changes, the coefficient was in inverse proportion to the roughness. When the roughness was in some range, the coefficient was in direct proportion to the roughness. However, fractal contacting theory concluded that the static friction coefficient between joint interfaces would be increased, when normal loads between the joint interfaces of the plates increased. Therefore, the static friction theory between the joint interfaces would be researched continually, and the fractal contacting theory would be improved.

Keywords: tie-rod rotor;static friction coefficient;roughness measurement;normal loads

2018, 44(9): 131-135  收稿日期: 2018-01-11;收到修改稿日期: 2018-03-17

基金项目: 国家自然科学基金资助项目（51475311）

作者简介: 李俊南(1993-),男,江苏南通市人,硕士研究生,专业方向为机械结构接触研究

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