多因素影响的格莱圈材料摩擦磨损试验研究  

Experimental Study on Friction and Wear of Glyd-Ring Materials Affected by Multiple Factors

作　　者：李磊 刘晓玲 刘凤麒 郭光福 LI Lei;LIU Xiaoling;LIU Fengqi;GUO Guangfu(School of Mechanical&Automotive Engineering,Qingdao University of Technology,Qingdao Shandong 266520,China)

机构地区：[1]青岛理工大学机械与汽车工程学院,山东青岛266520

出　　处：《润滑与密封》2021年第6期45-51,共7页Lubrication Engineering

基　　金：国家自然科学基金项目(51475250)。

摘　　要：格莱圈由聚四氟乙烯(PTFE)矩形滑环和丁腈橡胶(NBR)O形圈组成。为了研究不同因素对于格莱圈密封材料摩擦磨损性能的影响,利用UMT-3多功能摩擦磨损试验机,通过改变往复频率、粗糙度、润滑状态研究格莱圈材料与45钢配副时的摩擦磨损性能,利用SEM对试块试验前后表面形貌进行观测,并对摩擦磨损机制进行分析。试验结果表明:在干摩擦和滴油润滑条件下PTFE材料相比NBR材料具有更为优异的摩擦磨损性能;NBR材料表面粗糙度过高或过低都会导致摩擦因数升高,表面粗糙度对具有自润滑性能的PTFE材料的摩擦因数影响不大;高往复频率会使NBR材料摩擦因数降低,过高或过低的往复频率都会使PTFE材料摩擦因数降低;NBR材料的磨损形式以磨粒磨损和黏着磨损为主,PTFE材料以黏着磨损和疲劳磨损为主。Glyd-ring are made up of rectangular slip ring of polytetrafluoride(PTFE)and O-ring of nitrile rubber(NBR).In order to study the influence of different factors on the friction and wear properties of the Glyd-ring sealing materials,with the UMT-3 multi-functional friction and wear test machine,the performances of friction and wear of the Glyd-ring materials matched with 45 steel were investigated considering the reciprocating frequency,roughness and lubrication state.The surface morphology of the test block before and after the test was observed with SEM,and the friction and wear mechanism was analyzed.The test results show that,under dry friction and oil-lubricated conditions,friction and wear performance of PTFE material is better than that of NBR material.Too high or too low surface roughness of NBR material will lead to an increase in friction coefficient,but roughness has little effect on PTFE materials due to its self-lubricating properties.The friction coefficient of NBR material is decreased under high reciprocating frequency,but the friction coefficient of PTFE material is decreased as the reciprocating frequency is high or low.Abrasive and adhesive wear are the main wear forms of NBR material,however,adhesive and fatigue wear are dominant for PTFE material.

关 键 词：格莱圈 往复频率 粗糙度 润滑状态 摩擦磨损 

分 类 号：TH137[机械工程—机械制造及自动化]