High-energy explosive expansion characteristic parameter measuring device

Abstract

The invention discloses a high-energy explosive expansion characteristic parameter measuring device. A problem that the thermal expansion characteristic parameter of solid explosive charge cannot be measured by existing test devices is solved. The basic principle of the measuring device is characterized in that explosive charge is heated to a certain temperature by using a heating sleeve, the temperature of the explosive is measured in real time by using a thermocouple, the pressure generated by the heating expansion of the explosive charge is measured by using spring steel having a known deformation coefficient, a displacement sensor positioned above the spring steel is pushed through the deformation of the spring steel to obtain displacement data, and a three-dimensional relational graphamong the temperature, the expansion force and the expansion size of the explosive charge is established. The high-energy explosive expansion characteristic parameter measuring device has the advantages of strong versatility, high accuracy and low cost, can simultaneously meet requirements of the expansion parameter measurement of liquid explosives, slurry explosives and all-solid explosives, andprovides complete data support for the design of middle-large ammunition charge.

Description

technical field [0001] This application belongs to the technical field of explosive performance parameter experiments, and relates to a high-energy explosive expansion characteristic parameter measurement device, which is mainly used to measure the law of influence of environmental temperature changes on explosive charge performance, and obtain displacement-time, volume-time, pressure - Time, displacement-temperature parameters, providing technical and data support for the development of medium and large ammunition charges. Background technique [0002] Explosives may encounter unexpected thermal stimulation during manufacture, transportation, and use. Due to the nature of thermal expansion and contraction of materials, explosives may expand or contract radially and axially. Under normal circumstances, in weaponry, explosives are assembled in a projectile body with a fixed shape and limited space, and are in close contact with the projectile. Expansion of the pyrotechnic pro...

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Problems solved by technology

[0005] (1) This method is only applicable to the determination of thermal expansion coefficient of propellant and explosive under free conditions, and the measured expansion coefficient cannot be directly used to guide the design of propellant and explosive charge;

[0006] (2) This method cannot obtain the relationship curve among expansion displacement, temperature and pressure, which is not conducive to comprehensive analysis and evaluation of samples

[0007] Giant ammunition charge is a national strategic weapon, and its temperature expansion performance is related to the safety and reliability of the whole bomb. For non-ideal and nonlinear explosives, there is a huge difference between unconstrained and constrained. Therefore, the current performance evaluation methods of explosives cannot To meet the research needs, there is an urgent need for a high-energy explosive charge thermal expansion coefficient measurement device and method

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