接触式机械密封混合润滑状态摩擦演化规律研究  

Frictional Evolution of Contact Mechanical Seals with Hybrid Lubrication

作　　者：毕浩程 郝木明[1] 任宝杰 孙鑫晖[1] 李勇凡 李天照 刘馥瑜 厉晓英 BI Haocheng;HAO Muming;REN Baojie;SUN Xinhui;LI Yongfan;LI Tianzhao;LIU Fuyu;LI Xiaoying(College of New Energy,China University of Petroleum,Shandong Qingdao 266580,China;Dongying Hiscien Sealing Technology Co,Ltd,Shandong Dongying 257067,China)

机构地区：[1]中国石油大学(华东)新能源学院,山东青岛266580 [2]东营海森密封技术有限公司,山东东营257067

出　　处：《摩擦学学报》2023年第11期1241-1253,共13页Tribology

基　　金：国家自然科学基金项目(51975585)资助。

摘　　要：接触式机械密封在运转中主要处于混合润滑状态,为探究其混合润滑状态下摩擦机理,结合粗糙面弹塑性模型,求解考虑密封端面粗糙度效应的雷诺方程,探究了转速和介质压力等工况条件对密封混合润滑状态密封摩擦参数的影响,推导了密封声发射波能量公式,将密封混合润滑状态分为磨损期和稳定期,应用1.5维谱理论提取密封特征频率,探究混合润滑状态摩擦演化规律.研究结果表明摩擦参数影响密封声发射波能量幅值且密封摩擦形式随混合润滑状态发生变化:在磨损期,微凸体接触特征频率幅值较大,密封端面间摩擦以微凸体接触为主;在稳定期,流体膜黏性剪切摩擦特征频率幅值变大,黏性剪切效应增强,密封端面只存在局部微凸体接触.所得结论对接触式机械密封混合润滑状态摩擦机理的研究具有一定的理论指导意义.Contact-type mechanical seals are widely utilized across various industries,including aviation,maritime,and chemical engineering,owing to their exceptional sealing capabilities.During their operational lifespan,these seals are subjected to diverse frictional states,namely dry friction,boundary lubrication,and hybrid lubrication.In the context of dry friction and boundary lubrication,the predominant mode of friction between the seal faces is attributed to direct contact between microasperities,which significantly contributes to seal wear and impairs its longevity.However,when operating under hybrid lubrication conditions,both fluid film lubrication and microasperity contact play substantial roles in the overall frictional behavior.Given the prevalence of hybrid lubrication as the dominant operating state for contacttype mechanical seals,it becomes imperative to thoroughly investigate the intricate frictional mechanisms governing such conditions.Understanding the underlying phenomena will shed light on the fundamental aspects of friction in hybrid lubrication,thereby facilitating the development of effective strategies to optimize seal performance and enhance their reliability.In order to investigate the friction mechanism under hybrid lubrication conditions,a comprehensive study was conducted by integrating a rough surface elastoplastic model and solving the Reynolds equation considering the influence of seal face roughness.The impact of various operating conditions,such as rotational speed and fluid pressure,on the friction parameters governing the sealing performance in the hybrid lubrication state was thoroughly examined.Furthermore,an energy formula for the emitted acoustic waves during sealing was derived to quantify the energy distribution.To experimentally validate the findings,a specialized test rig for contact-type mechanical seal friction was developed.Concurrently,the collection of seal face temperature data and acoustic emission signal data was performed.By analyzing the acquired seal face temperature

关 键 词：接触式机械密封 混合润滑 摩擦参数 1.5维谱 演化规律 

分 类 号：TH117.2[机械工程—机械设计及理论]