Characteristic research on runaway escapement driven by two slide-blocks

The runaway escapement driven by two slide-blocks was theoretically analyzed, and the optimum matching law of the escapement parameters was studied by Visual Nastran software. The optimum matchings of up slide-block mass vs. down slide-block mass and pull-spring rigidity vs. inertia-spring rigidity were tested by orthogonal method and simulated. The simulated and tested results show that the escapement can effectively differentiate missile's overloading from disturbing force caused by environment at service handling; avoid broken tooth problem of the escapement in recoil arming device driven by single mass block; have the optimum ratio of 7.96 between down slide-block mass and up slide-block mass, that of 2.75 between pull-spring rigidity and inertia-spring rigidity, under which the displacement and velocity responses are the least in impact and vibration test.