Throat bolt type variable thrust solid rocket engine ground testing device

Abstract

The invention discloses a throat bolt type variable thrust solid rocket engine ground testing device and belongs to the field of throat bolt engine ground testing. The throat bolt type variable thrustsolid rocket engine ground testing device comprises a driving mechanism and a simulating mechanism, wherein the driving mechanism comprises a motor fixing cover, a stepping motor, a sliding marker post, a motor fixing barrel, a movement limiting nut, a first movement transfer plate, a fastening nut, a second movement transfer plate, a first throat bolt connecting rod, a tension and pressure sensor, a second throat bolt seal ring, a displacement sensor and a movement connecting rod; the simulating mechanism comprises a front seal head, spring firmware, a left fixed barrel, a back seal head, acompression spring, a screw, a pressure sensor seat and a throat bolt. The throat bolt type variable thrust solid rocket engine ground testing device disclosed by the invention can achieve a throat bolt type variable thrust solid rocket engine ground test and has the advantages that (1) verification by tests at different thrusts and different pressures is achieved; (2) closed-loop control of the throat bolt of the engine is achieved; (3) the testing cost is low and more data is acquired; (4) the device is simple in structure and good in durability; and (5) the driving mechanism is light in weight.

Description

technical field [0001] The invention relates to a ground testing device for a throat plug type variable thrust solid rocket motor, which belongs to the field of ground testing of throat plug motors. Background technique [0002] The solid rocket motor has poor controllability. The solid propellant is all stored in the combustion chamber in the form of charge. Once ignited, the combustion surface changes according to a predetermined rule. Start-up, which greatly limits the application and development of solid rocket motors. Some weapon models also have to use liquid rocket motors as the power device for missile end correction. Many space vehicles with limited volume have to use difficult long-term storage and volume ratios. Small liquid fuel engines or gas generators. Therefore, advanced thrust regulation technology has always been one of the important directions for the development of solid rocket motors. [0003] At present, the test test mainly relies on the thermal igni...

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Problems solved by technology

[0004] In order to solve the problems of single structure function, complex structure and poor durability of the existing throat-bolt type variable thrust solid rocket motor ground test device, the technical problem to be solved by the throat plug type variable thrust solid rocket motor ground test device disclosed by the present invention is Realizing the ground test of the throat plug type variable thrust solid rocket motor has the following advantages: (1) Realize the verification of tests under different thrusts and different pressures; (2) Realize the closed-loop control of the engine throat plug; (3) Low test cost, obtain More data, (4) simple structure, good durability; (5) light driving mechanism

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