Device and method for measuring thermal expansion coefficient of high-energy explosive charge

Abstract

The invention discloses a high-energy dynamite charging thermal expansivity measuring device and method. The problem that an existing test device fails to measure solid state dynamite charging thermal expansion characteristic parameters is solved. According to the basic principle of the device and method, a heating jacket is used for heating dynamite charging to a certain temperature, a thermocouple is used for measuring a dynamite temperature in real time, spring steel with a known deformation coefficient is used for measuring pressure generated when the dynamite charging is heated and expanded, meanwhile, deformation of the spring steel is used for pushing a displacement sensor located above to obtain displacement data, and thus, a three-dimensional relational graph of the temperature, the expansibility and the expansion size of the dynamite charging is established. The device and method provided by the invention have the advantages of high universality, high accuracy and low cost, the requirements for measuring expansion parameters of liquid explosives, slurry explosives and all-solid-state explosives can be met simultaneously, and a more comprehensive data support is provided for middle-large sized ammunition charging designs.

Description

technical field [0001] This application belongs to the technical field of explosive performance parameter experiment, and relates to a high-energy explosive charge thermal expansion coefficient measurement device and method, 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 provide 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 pyrotec...

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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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