大尺寸海工滚子链混合润滑性能分析  

Analysis on Mixed Lubrication Performance of Pin-bush Pairs in Large-sized Marine Chain

作　　者：刘毅 刘晓玲 刘国梁 李群 Liu Yi;Liu Xiaoling;Liu Guoliang;Li Qun(Qingdao Choho Industrial Co.,Ltd.,Qingdao 266071,China;School of Mechanical&Automotive Engineering,Qingdao University of Technology,Qingdao 266520,China)

机构地区：[1]青岛征和工业股份公司,山东青岛266071 [2]青岛理工大学机械与汽车工程学院,山东青岛266520

出　　处：《机械传动》2024年第12期100-107,共8页Journal of Mechanical Transmission

基　　金：国家自然科学基金项目(51475250,52375446)。

摘　　要：为了研究大功率海洋装备发动机滚子链的磨损问题,分析了销轴-套筒副的运动特性,建立了销轴-套筒副的热混合润滑模型,研究了等效曲率半径、卷吸速度、表面粗糙度等对滚子链混合润滑性能的影响。结果表明,当大尺寸滚子链处于低速、轻载工况时,销轴-链板副处于流体润滑状态,热效应可以忽略;综合曲率半径并未引起明显的尺寸效应;在启动、停车阶段,由于摩擦因数较高,接触载荷比较大,销轴与套筒接触副处于混合润滑阶段,易引起磨损;高的表面粗糙度需更高的卷吸速度才能使接触副处于流体润滑状态;表面粗糙度越大,摩擦因数越高,膜厚比越小,润滑状态越差;低速使得销轴和套筒处于混合润滑甚至边界润滑状态,表面硬弹比对摩擦因数和最大油膜温升会产生一定影响;环境黏度会影响润滑状态。To investigate the issue of wear in the roller chain of high-power marine equipment engines,an analysis of the motion characteristics of the pin-bush pair was conducted.A model of thermal mixed lubrication of the pin-bush pair was established to study the effects of the equivalent curvature radius,the entrainment velocity,the surface roughness,etc.on the mixed lubrication performance of the roller-chain.The results show that when the large-sized roller-chain assembly operates under low-speed and light-load conditions,the pin bush pair is essentially in a hydrodynamic lubrication state,and thermal effects can be neglected.No significant scale effect is induced by the equivalent curvature radii.In the startup and shutdown phases,the high friction coefficient between the pin and the bushings,along with the higher contact load,places the contact pair in a mixed lubrication regime,making it susceptible to wear.Higher surface roughness requires a higher entrainment velocity to maintain the contact pair in a hydrodynamic lubrication.As the roughness increases,the friction coefficient also increases,and the film thickness ratio decreases,leading to a worse lubrication state.Due to the low speed,the pin and bush are in a mixed or even boundary lubrication state.Surface hardness has a certain impact on the friction coefficient and maximum oil film temperature rise.In addition,the lubricating status is influenced by the environment viscosity.

关 键 词：滚子链 销轴-套筒副 混合润滑 表面粗糙度 硬弹比 

分 类 号：U664.1[交通运输工程—船舶及航道工程] TH117.2[交通运输工程—船舶与海洋工程]