高压油滤进油导管裂纹及油滤支座固定铆钉断裂分析  

Failure Analysis of Oil Inlet Duct and Support Fixation Rivets of High-pressure Filter

作　　者：田浩[1] 陈荣[1] 傅国如[1] 李权[1] TIAN Hao;CHEN Rong;FU Guo-ru;LI Quan(Beijing Aeronautical Technology Research Center,Beijing 100076,China)

机构地区：[1]北京航空工程技术研究中心,北京100076

出　　处：《失效分析与预防》2020年第6期393-397,403,共6页Failure Analysis and Prevention

摘　　要：针对液压系统高压油滤进油导管裂纹及油滤支座固定铆钉断裂故障,采用宏微观观察、金相组织分析、硬度检测等理化检测方法,并结合高压油滤部位结构特点和使用工况,对失效原因进行分析。结果表明:进油导管的裂纹性质为疲劳开裂,原因是其承受顺航向横向方向的异常大载荷;油滤支座固定铆钉的断裂性质为疲劳断裂,原因为高压油滤部位实际载荷情况比较复杂,铆钉疲劳裕度不足;进油导管疲劳裂纹是油滤支座固定铆钉断裂后产生异常振动导致的,为受害件。建议对高压油滤部位实际载荷情况进行校核,采取有效措施提高该部位结构稳定性和抗疲劳性能。Aiming at the cracking of high-pressure filter oil inlet duct and the fracture of filter support fixation rivets in the aircraft hydraulic system,the fault cause was analyzed by means of macro and micro observation,metallurgical structure analysis,hardness testing,etc.The structure characteristics and working conditions of the high-pressure filter position were also considered.The results show that the crack mode of the oil inlet duct is fatigue crack,which is due to an abnormally large load in the lateral direction of the vector.The fracture mode of the filter support fixation rivets is fatigue fracture,which is because the actual load situation of the high-pressure filter position is more complex,and the fatigue margin is insufficient.The fatigue cracking of the oil inlet duct is caused by abnormal vibration after the fracture of the rivets,so it is the victim.It is suggested that the actual load condition of the high-pressure oil filter position should be checked and effective measures should be taken to improve the structural stability and fatigue property.

关 键 词：高压油滤 进油导管 铆钉 疲劳裕度 结构稳定性 

分 类 号：V245[航空宇航科学与技术—飞行器设计]