某液压缸内置通油管处O形密封圈漏油问题的解决  

Solution to the Oil Leakage Problem of the O-ring Seal at the Built-in Oil Pipe of a Hydraulic Cylinder

作　　者：赵黎明[1] 宋顺利 郭建伟[1] 徐鹤元 王晔 ZHAO Li-ming;SONG Shun-li;GUO Jian-wei;XU He-yuan;WANG Ye(Beijing Institude of Space Launch Technology,Beijing 100076,China;China Academy of Launch Vehicle Technology,Beijing 100076,China)

机构地区：[1]北京航天发射技术研究所,北京100076 [2]中国运载火箭技术研究院,北京100076

出　　处：《液压气动与密封》2022年第6期51-53,56,共4页Hydraulics Pneumatics & Seals

摘　　要：该文针对某液压缸内置通油管处O形密封圈的漏油问题,通过FTA分析,原因定位于通油管和小导向套两零件密封间隙偏大,开式挡圈抗挤出性较差,在有杆腔高压油的反复挤压作用下发生挡圈变形、断裂失效,进而引起O形密封圈发生间隙挤出、断裂失效漏油。通过采用减小配合间隙、改进密封结构的措施,进行了加载循环可靠性试验验证。试验结果表明措施有效。This article aims at the oil leakage problem of the O-ring seal at the built-in oil pipe of a hydraulic cylinder,through FTA analysis,the reason is located in the large sealing gap between the two parts and the poor extrusion resistance of the open ring.Under the repeated extrusion of the high-pressure oil in the rod cavity,the open ring is broken,resulting in the clearance extrusion,fracture failure and oil leakage of the O-ring.Through the measures of reducing the fit clearance and improving the sealing structure,the tests are shows that the measures are effective.

关 键 词：液压缸 O形密封圈 漏油 FTA 

分 类 号：TH137[机械工程—机械制造及自动化]