起落架缓冲支柱柱塞组件故障分析及改进研究  

Research on Fault Analysis and Improvement of Plunger Assembly of Landing Gear Buffer Strut

作　　者：滕伟杰 刘成 王俊 TENG Weijie;LIU Cheng;WANG Jun(State-operated Machinery Factory of Wuhu,Wuhu 241007,China)

机构地区：[1]国营芜湖机械厂,芜湖241007

出　　处：《航空工程进展》2022年第4期101-106,共6页Advances in Aeronautical Science and Engineering

摘　　要：某起落架缓冲支柱修理时发现柱塞组件的螺母螺纹发生咬合变形,为了探究该故障发生的原因,根据柱塞组件的结构特点与工作原理,构建螺纹咬合变形故障的故障树,基于历史试验数据、螺纹剩余强度分析以及产品状态检查等方法对故障树底事件逐一分析并进行改进研究。结果表明:螺母设计缺陷和螺母未装配到位是导致螺纹发生咬合变形的原因;将螺距改为2 mm、使用双套筒式专用工装可提高螺纹剩余强度,保证螺母的分解、装配质量。During the repair of landing gear buffer strut,it is found that the nut thread of plunger assembly is occlud⁃ed and deformed.In order to study the cause of the fault,the fault tree of thread occlusion deformation fault is con⁃structed according to the structural characteristics and working principle of plunger assembly.Based on historical test data,thread residual strength analysis and product condition inspection,the bottom events of the fault tree are analyzed,and carry out improvement research.The results show that the design defect of the nut and the failure to assemble the nut in place are the reasons for the bite deformation of the thread,and changing the pitch to 2 mm and using the double sleeve special tooling are of great significance to improve the residual strength of the thread and en⁃sure the decomposition and assembly quality of the nut.

关 键 词：起落架 柱塞组件 螺纹咬合 故障分析 剩余强度 

分 类 号：V226[航空宇航科学与技术—飞行器设计] V267.46