An electrostatic safety testing device and method for a solid motor

Abstract

The invention provides a solid motor electrostatic safety testing device and a solid motor electrostatic safety testing method. The solid motor electrostatic safety testing device comprises a simulated engine system, an electrostatic sensitivity instrument and a protective board, wherein the electrostatic sensitivity instrument and the simulated engine system are distributed on both sides of the protective board. According to the solid engine electrostatic safety testing device, electric energy stored in a capacitor is used for oscillating discharge of an engine through an upper electrode and a lower electrode which are movable on the electrostatic sensitivity instrument, so as to judge electrostatic safety according to a result of response of the engine after discharge. Compared with the test result of a propellant sample, the solid motor electrostatic safety testing device and the solid motor electrostatic safety testing method can effectively simulate electrostatic tests of a large solid engine, have reliable results, save test cost and reduce test loss.

Description

technical field [0001] The invention relates to a test device and method, in particular to a solid motor electrostatic safety test device and method. Background technique [0002] The solid engine generates high-temperature and high-pressure gas through the normal combustion of solid propellants, and then accelerates through the expansion of the nozzle to generate thrust to propel the missile to fly. Since the solid propellant is an energetic substance, it will burn stably and orderly during normal ignition, which meets the requirements of use; but if the energetic substance encounters additional electrostatic excitation, accidents such as combustion and explosion may occur. [0003] The electrostatic sensitivity of energetic materials has always been tested by electrostatic spark sensitivity. Generally, the maximum energy that a pyrotechnic agent can withstand is 700mJ. The principle of the test is to determine the minimum energy that can cause a reaction of several hundre...

AI Technical Summary

Problems solved by technology

The above test device can only evaluate the electrostatic performance of the propellant, but cannot evaluate the electrostatic safety of the engine system

[0006] In summary, the current domestic method for evaluating the electrostatic safety of solid motors is simply to test the electrostatic spark sensitivity of composite propellants, and the sample is a small tablet of several grams ( figure 1 method), which cannot reflect the electrostatic properties of fixed propellants

The French test method adopts a large grain design, but it cannot simulate the system structure of the engine and cannot evaluate the electrostatic safety of the engine

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