机械密封用碳化硅材料干摩擦试验研究  

Study on Dry Friction Test of Silicon Carbide for Mechanical Seal

作　　者：姚黎明 刘杰 李香 丁思云 彭骞 谢星 YAO Li-ming;LIU Jie;LI Xiang;DING Si-yun;PENG Qian;XIE Xing(Machinery Industry Mechanical Seals Engineering Research Center,Hefei General Machinery Research Institute Co.,Ltd.,Hefei 230031,China;Hefei General Environment Control Technology Co.,Ltd.,Hefei 230031,China;General Key Core Parts(Anhui)Innovation Center Co.,Ltd.,Hefei 230031,China)

机构地区：[1]合肥通用机械研究院有限公司机械工业机械密封工程技术研究中心,安徽合肥230031 [2]合肥通用环境控制技术有限公司,安徽合肥230031 [3]通用关键核心零部件(安徽)创新中心有限公司,安徽合肥230031

出　　处：《液压气动与密封》2025年第3期30-35,共6页Hydraulics Pneumatics & Seals

基　　金：国家重点研发计划(2022YFB3706200);安徽省重点研发计划(2022A05020002)。

摘　　要：针对机械密封常用的碳化硅摩擦副材料,在试验机上进行摩擦副在不同转速、法向载荷以及材料配对条件下进行摩擦试验,对比分析密封环的摩擦系数和端面形貌变化规律。结果显示:在干运转工况下,密封环摩擦系数受转速、压力和材料的影响,试验阶段密封环摩擦副的摩擦系数随时间不断变化,且加碳碳化硅(SSiC+C)/反应烧结碳化硅(RBSiC)的摩擦系数在运行初始阶段要小于反应烧结碳化硅(RBSiC)/反应烧结碳化硅(RBSiC)。因此,当选用碳化硅/碳化硅配对的机械密封需短暂的运行干摩擦工况时,窄密封环可选用加碳碳化硅,通过降低转速、载荷和减少运行时间,可减少干摩擦工况对机械密封端面的损伤。According to the silicon carbide friction pair material commonly used in mechanical seal,the friction test was carried out on the test machine under the conditions of different speed,normal load and material pairing,and the change law of the friction coefficient and the surface topography of the sealing ring was compared and analyzed.The results show:Under dry running conditions,the friction coefficient of the seal ring is affected by the speed,pressure and material,and the friction coefficient of the seal ring friction pair changes with time during the test stage.The friction coefficient of carbonized silicon carbide(SSiC+C)/reaction-sintered silicon carbide(RBSiC)is lower than that of reaction-sintered silicon carbide(RBSiC)/reaction-sintered silicon carbide(RBSiC)at the initial stage of operation.Therefore,if the mechanical seal with silicon carbide/silicon carbide pairing needs to run dry friction conditions for a short time,the narrow seal ring can be used to add carbon silicon carbide,reduce the speed,load and reduce the running time,in order to reduce the dry friction conditions on the mechanical seal end face damage.

关 键 词：机械密封 碳化硅 密封环 干摩擦 摩擦系数 

分 类 号：TB42[一般工业技术]