Solid fuel vacuum pouring device

Abstract

The invention discloses a solid fuel vacuum pouring device which comprises a hopper, a plunger type flow regulating valve core, a pattern plate, a pouring cylinder cover, a pouring cylinder body, a water bath circulating heater, a water bath silica gel hose, a vacuum pressure gauge, a vacuum pipeline, a vacuum pump, a manual three-way ball valve and a forming die. The hopper and the pouring cylinder body are designed into a double-layer structure, and the circulating water bath heater is used for heating and insulating the hopper and the pouring cylinder body, so that the temperature of medicinal slurry can be maintained within a temperature range required by a pouring process for a long time, the fluidity and the leveling property of the medicinal slurry meet the requirements of the pouring process, and normal pouring of the medicinal slurry is realized. The replaceable pattern plate is arranged at the bottom of the hopper and can be adjusted and replaced according to the size and theshape of fuel. The interior of the pouring cylinder body is connected with the vacuum pump through a vacuum conduit, so that the medicinal slurry is poured into the forming die in a vacuum environment, and the poured fuel is free of bubbles or air holes.

Description

technical field [0001] The invention relates to the field of charging of solid rocket motors and solid-liquid mixed motors, in particular to a solid propellant and solid fuel vacuum pouring device. Background technique [0002] Solid rocket motors and solid-liquid hybrid engines are the power devices of spacecraft. Solid propellant grains or solid fuel grains of a certain shape are installed in the combustion chamber shell, and the grain type is set according to the ballistic design requirements of the engine. In order to ensure the packing density and internal ballistic stability of the engine, it is required that the grain structure is complete, and there are no pores, cracks and spongy loose tissues on the surface and inside. In addition, when the mechanical properties and combustion characteristics of solid propellants or fuels are often studied in experiments, it is required that the surface and interior of the prepared drug bars should not have defects such as pores or...

AI Technical Summary

Problems solved by technology

During the pouring process, the vacuum pouring device cannot keep the slurry warm, because the temperature is low, the viscosity of the slurry is high, and the fluidity and leveling properties are reduced, which will easily cause the slurry to fail to pass through the flower plate smoothly, and the air bubbles in the slurry are difficult to remove , especially for the slurry whose viscosity is greatly affected by temperature, such as paraffin-containing fuel, the slurry cannot be kept warm during the pouring process, and the slurry solidifies and has no fluidity, resulting in pouring failure; the use of the intubation device is complicated, and only the diameter Larger drug columns cannot realize the vacuum pouring of billet drug rods and small drug columns. The length of the cannula is longer and the inner diameter of the cannula is smaller. It is difficult to clean the slurry in the cannula after pouring

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