Fuze The Tortuous Slot Recoil Theoretical Study Of The Insurance Institutions

The zigzag device has the characteristics of simple structure and compactness, and can distinguish the launch overload in a larger range. When the zigzag device is used in fuzes of rocket and recoilless with low setback force, the setback force of rocket and recoilless fired in launch environment is far lower than impact force in drop environment, it becomes a problem in assuring the safety in handling transportation and storage and the reliability arming in launch in design of fuze zigzag device.In order to provide a theoretical guidance for the design of fuze zigzag device, a analysis of the movement course of fuze zigzag device is done in detail. The rigid-body dynamics theory is applied to establishe a mathematical model of fuze zigzag device. The numerical calculation for zigzag device which is used in four kinds of fuzes is finished by Runge-Kutta method, the results showed that the theoretical analysis of fuze zigzag device accord with the the engineering practice test results.The relations between velocity change of projectile and rectangular pulses are studied when zigzag device complete the whole movement process and arming under the function of rectangular pulse. The effects on the results of structure parameters such as inertia cylinder spring stiffness, inertia cylinder spring pre-compression, the mass of inertia cylinder, the friction coefficient between guide pin and zigzag slot; the angle of zigzag slot are analyzed quantificationally. It can conclude that it is most effective in distinguishing lower launch overload and delaying arming by changing inertia cylinder spring stiffness, inertia cylinder spring pre-compression and the mass of inertia cylinder in the condition of small size.The numerical analogy proves that fuze zigzag device used in 100 g launch overload environment is feasible. How to select the structure design parameters in low launch overload environment is summarized, that is fuze zigzag device can be applied in lower launch overload environment by properly reducing inertia cylinder spring stiffness, inertia cylinder spring pre-compression and the mass of inertia cylinder under the condition of no change of other structure parameters. By improving the fuze setback arming zigzag device, a new-pattern two degrees of freedom and zigzag slot setback arming device is designed, which can be used in very low launch overload environment (missile fuze etc.), for example the launch overload coefficient is 10 g in the same course.