单向阀内部振动的分析

在双组元推进系统中,使用单向阀控制气体介质单向流动.当上游气源接通时,单向阀受到瞬间冲击激励,其阀芯与弹簧构成简单的弹簧质量系统,在阻尼作用下,与非线性阀座或刚性阀座碰撞,会出现复杂的共振现象,导致整个气压系统不稳定.文中建立了单向阀弹簧质量系统的数学模型,并分析了所产生的共振现象,为单向阀设计、试验和使用中控制共振现象提供了一种方法.

Analysis of Internal Resonance of Check Valve

In a bipropellant propulsion system,a check valve is used to control gas unidirectional flow.A impulsive force is applied on the check valve when upstream gas source is switched on piston and spring of the check valve constituting a simple mass-spring system with damp,in collision with nonlinear seat or rigid valve seat,internal resonance can occur,these resulting in whole pneumatic system instability.We give a mass-spring model of the check valve is given and the internal resonances is analyzed in the pape...