混合润滑下变双曲圆弧齿线圆柱齿轮摩擦特性及传动效率分析  

Analysis of Friction Characteristics and Transmission Efficiency of Gear with Variable Hyperbolic Circular-Arc-Tooth-Trace under Mixed Lubrication

作　　者：魏永峭 杨海江 郭瑞 刘永平 董长斌 WEI Yongqiao;YANG Haijiang;GUO Rui;LIU Yongping;DONG Changbin(School of Mechanical Engineering,Lanzhou University of Technology,Gansu Lanzhou 730050,China;Wenzhou Engineering Institute of Pump&Valve,Lanzhou University of Technology Zhejiang Wenzhou 325105,China)

机构地区：[1]兰州理工大学机电工程学院,甘肃兰州730050 [2]兰州理工大学温州泵阀工程研究院,浙江温州325105

出　　处：《摩擦学学报（中英文）》2024年第10期1417-1428,共12页Tribology

基　　金：国家自然科学基金项目(52105058);温州市基础性科研项目(G20220009);兰州市青年科技人才创新项目(2023-QN-43)资助。

摘　　要：齿轮在实际运行中由于润滑状态的不同,齿面摩擦系数存在显著差异,从而对齿轮的传动效率产生影响.变双曲圆弧齿线(VH-CATT)圆柱齿轮通常工作在混合润滑状态下,采用载荷分担理论推导了混合润滑下VH-CATT圆柱齿轮摩擦系数计算公式,建立了混合润滑下VH-CATT圆柱齿轮传动效率计算模型,并通过绘制Stribeck曲线,研究了表面形貌参数、润滑油参数和法向载荷等对混合润滑状态下VH-CATT圆柱齿轮摩擦性能和传动效率的影响规律.研究结果表明:表面形貌参数的变化会导致混合润滑区扩大,从而使相同速度下的摩擦系数增大;润滑油黏度的增加会导致摩擦系数增大,同时Stribeck曲线向左移动,混合润滑区向边界润滑区扩展;载荷对Stribeck曲线的影响集中体现在混合润滑区与边界润滑区的过渡阶段;随着转速的增加,传动效率逐渐升高并趋于稳定,而在齿轮转速较低时,润滑油黏度和粗糙度对齿轮传动效率有显著影响.In practical applications,gears often exhibit varying lubrication conditions,resulting in significant fluctuations in the friction coefficients of gear pairs.These variations directly affect the transmission efficiency of gears.The present study focuses on variable hyperbolic circular arc toothed tooth(VH-CATT)cylindrical gears,which typically operate under the mixed lubrication conditions.To calculate the friction coefficient of VH-CATT cylindrical gears,the curvature,speed,load,and other pertinent parameters in the contact area were calculated in this paper.Furthermore,by integrating measured roughness data from gear surfaces,the friction coefficient of VH-CATT cylindrical gears under the mixed lubrication conditions was derived using the load sharing theory.Subsequently,a transmission efficiency calculation model for VH-CATT cylindrical gears was established.Through drawing the Stribeck curve,the influence of surface morphology parameters,lubricant parameters,normal load,etc.on the friction coefficient,friction performance and transmission efficiency of VH-CATT cylindrical gears under mixed lubrication were investigated.To further illustrate the interaction of these parameters,consider an example where a VH-CATT gear operating under mixed lubrication experienced a sudden increase in normal load.Without proper lubrication,this increase could lead to rapid wear and a significant increase in friction coefficient,affecting both friction performance and transmission efficiency.However,with an appropriate lubricant,the protective oil film could absorb the increased pressure,reducing wear and maintaining a low friction coefficient.The results showed that the friction coefficient exhibited a pattern of first decreasing and then increasing as the rotational angle increases.Notably,the friction coefficient attained its lowest value at the node.This phenomenon could be attributed to the concurrent presence of sliding and rolling friction during gear meshing.However,in the vicinity of the node,the gears were primarily in

关 键 词：变双曲圆弧齿线圆柱齿轮 混合润滑 摩擦系数 STRIBECK曲线 传动效率 

分 类 号：TH117.1[机械工程—机械设计及理论] TH117.2