摘要
针对某电磁阀在试车及关机后出现的阀座密封性不稳定现象,梳理出两种故障模式。基于此开展了电磁阀结构强度、动态特性、流场仿真计算。结合相关试验验证情况,分析了装配应力及运动过程对产品密封性能的影响,给出了阀座密封性不稳定的主要原因是装配应力使阀座密封面发生不均匀变形,造成泄漏量增大;电磁阀断电打开时的撞击及侧向流体力可能导致密封块偏斜,进而造成阀座漏量增大。据此,提出了相应的改进措施并得到热试车验证。
In view of the sealing instability of the solenoid valve seat,which occurred in the engine test and after its shutdown,two fault modes were found out. Simulation calculation for structural strength,dynamic characteristics and the flow field of the solenoid valve is carried out. In combination with the relevant test results,the effect of assembly stress and movement process on the sealing performance of the product is analyzed. It is found that the main reasons for the instability of the solenoid valve seat seal is the inappropriate assembly stress which causes uneven deformation of the sealing surface of the valve seat,and the impact and lateral fluid strength which lead to a deviation of the sealing block after outage of the solenoid valve,resulting in leakage increase of the seal. Accordingly,the corresponding improvement measures are put forward and verified by hot-fire test.
作者
高曼
王志永
李小明
GAO Man;WANG Zhiyong;LI Xiaoming(Xi＇an Aerospace Propulsion Institute,Xi＇an 710100,China)
出处
《火箭推进》
CAS
2018年第5期43-47,共5页
Journal of Rocket Propulsion
关键词
电磁阀
泄漏
仿真计算
改进措施
solenoid valve
leakage
simulation calculation
improvement measure
