摘要
针对某型电磁阀力学冲击后阀体断裂的问题,计算了阀体的结构强度,分析了故障原因和断裂机理。在不改变电磁阀外形尺寸和性能的前提下,提出了增加结构强度的改进措施,仿真计算结果表明改进后阀体断裂部位应力降低至原来的42,电磁阀经过力学环境试验、整机试车及飞行试验考核,阀体断裂问题得到彻底解决。研究结果表明,当阀体结构存在应力集中时,在高量级冲击条件下极易出现开裂、断裂等问题,同时外壳与阀体的连接可靠性对阀体结构强度影响较大,电磁阀设计时应重点考虑。
Aiming at the problem of the valve body fracture for solenoid valve under impact loading condition,the stress of solenoid valve body was calculated,and the failure mechanism of the valve body fracture was analyzed.Without changing the size and performance of the solenoid valve,the improvement measures are put forward to increase the structural strength.The simulation results show that the stress of the improved solenoid valve is reduced to 42.After the improved solenoid valve was tested by the mechanical environment,the whole system test and the flight test,the fracture problems of the valve body were solved thoroughly.When the stress concentration exists in the structure,cracking and fracture are easy to occur in the impact mechanical environment.At the same time,the joint reliability of shell and body has great influence on the structural strength,and the design of solenoid valve should be emphatically considered.
作者
徐登伟
张萍
沙超
朱建国
XU Dengwei;ZHANG Ping;SHA Chao;ZHU Jianguo(Xi'an Aerospace Propulsion Institute,Xi'an 710100,China)
出处
《火箭推进》
CAS
2023年第3期90-95,共6页
Journal of Rocket Propulsion
基金
国家自然科学基金项目(u1737205)。
关键词
电磁阀
软磁合金
阀体断裂
故障
机理分析
solenoid valve
soft magnetic alloy
valve body fracture
failure
mechanism analysis
