某型机发动机短舱油封接头漏油故障诊断分析  

Fault Diagnosis and Analysis on Oil Leakage in Engine Nacelle Oil Seal Joint of a Certain Type of Engine

作　　者：韩持刚 娄雷亭 赵勇军 李薇 严山钦 刘虎腾 HAN Chigang;LOU Leiting;ZHAO Yongjun;LI Wei;YAN Shanqin;LIU Huteng(Changsha Landing Gear Branch,AVIC Airborne Company,Hanzhong 723000,China)

机构地区：[1]航空工业集团机载公司长沙起落架分公司,陕西汉中723003

出　　处：《机械工程师》2024年第12期142-145,共4页Mechanical Engineer

摘　　要：油封接头是在发动机油封时作为加注滑油的接口,近几年主机单位在使用过程中频繁发生接头堵盖处渗油故障。从油封接头结构来看,借鉴了典型的74°锥面密封型式进行设计,由于配合形式特殊,即便降低配合面粗糙度,在定力安装的条件下依然出现了泄漏现象。试验过程中发现,当配合锥面表面粗糙度达到Ra0.4μm以下的条件下才能实现密封,但是加工难度太高,最终通过在配合螺纹部位涂抹耐油密封润滑脂的方法,有效解决了油封接头漏油的故障。Oil seal connector is used as an interface for filling lubricating oil when engine oil sealing.In recent years,in the process of using the host unit,the oil seepage failure at the plug cover of the joint appears frequently.The structural design of the oil seal joint draws on the typical 74°taper seal type.Due to the special form of fit,even if the roughness of the mating surface is reduced,the leakage phenomenon still occurs under the condition of constant force installation.During the test,it is found that the seal can only be realized when the surface roughness of the mating taper surface reached Ra0.4μm or less,but the machining difficulty is too high.In the end,by applying oil-resistant sealing grease to the mating threads,the oil leakage problem of the oil seal joint is effectively solved.

关 键 词：锥面密封 粗糙度 密封润滑脂 

分 类 号：TH12[机械工程—机械设计及理论]