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Free loading grain pressing structure for solid rocket engine and application method

A technology of solid rockets and motors, which is applied in the direction of rocket motor devices, machines/engines, mechanical equipment, etc. It can solve problems such as spring falling off and abnormal internal ballistics, and achieve the effects of not easy falling off, simple structure, and convenient installation and disassembly

Active Publication Date: 2021-10-08
南阳北方向东工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention proposes a solid rocket motor free-loading charge column pressing structure and use method, which solves the problem in the prior art that the spring falls off during the engine's working process and causes abnormal internal ballistics

Method used

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  • Free loading grain pressing structure for solid rocket engine and application method
  • Free loading grain pressing structure for solid rocket engine and application method
  • Free loading grain pressing structure for solid rocket engine and application method

Examples

Experimental program
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Embodiment 1

[0025] like Figure 1~3 As shown, this embodiment provides a solid rocket motor free-loading charge-pressing structure, including a combustion chamber 5, in which a blocking cover 4, a conduit 1, and a charge compression ring 3 are sequentially arranged from left to right And free filling powder 7, the conduit 1 is provided with a pressure spring 2, one end of the conduit 1 is threaded with the plug 4, and the other end is slidably connected with the compression ring 3 of the pellet.

[0026] The present invention uses process as follows:

[0027] Put the drug pressing spring 2 in the catheter 1, press the drug column pressing ring 3 to press the drug pressing spring 2, and screw it into the catheter 1 until the drug column pressing ring 3 is set outside the catheter 1 and moves freely. Then, the conduit 1 is screwed into the central screw thread of the blocking cap 4 . Finally, the plugging cover 4 is fixed to the front end of the engine combustion chamber 5 that has been l...

Embodiment 2

[0029] The right end of the conduit 1 is provided with an external thread, and the left end of the drug column compression ring 3 is provided with an internal thread matched with the external thread, and the inner wall of the drug column compression ring 3 on the right side of the internal thread is a smooth surface.

[0030] After the medicine column pressing ring 3 is screwed into the external thread of the conduit 1, it can be sleeved on the conduit 1 and move freely without falling off due to the resistance of the thread. This also ensures that the grain holding-down ring 3 moves freely with the deformation of the grain pressing spring 2 and the grain and has a certain pretightening force.

[0031] Other structures of this embodiment are the same as those of Embodiment 1.

Embodiment 3

[0033] The side wall of the conduit 1 is provided with a number of first air holes, the first air holes communicate with the inner cavity of the blocking cover 4, and the right end surface and the side wall of the medicine column compression ring 3 are provided with some second air holes, and the medicine column pressure The outer surface of the tight ring 3 is provided with a drug-pressing surface 8 specially used for pressing the free-filling drug column 7 . The first ventilation hole communicates with the second ventilation hole, and the second ventilation hole communicates with the free-loading powder column 7 .

[0034] The purpose of providing the first vent hole and the second vent hole is mainly to facilitate gas circulation.

[0035] Other structures of this embodiment are the same as those of Embodiment 1.

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Abstract

The invention provides a free loading grain pressing structure for a solid rocket engine and an application method. The free loading grain pressing structure and the application method solve the problem that in the prior art, a spring falls off in the working process of an engine, and consequently an internal trajectory is abnormal. The free loading grain pressing structure for a solid rocket engine comprises a combustion chamber, a blanking cap, a guide pipe, a grain pressing ring and a free loading grain are sequentially arranged in the combustion chamber from left to right, a grain pressing spring is arranged in the guide pipe, one end of the guide pipe is connected to the blanking cap in a threaded mode, and the other end of the guide pipe is connected to the grain pressing ring in a sliding mode. According to the free loading grain pressing structure for the solid rocket engine, the grain pressing spring can press the free loading grain through the grain pressing ring; in addition, the area of the grain pressing surface of the grain pressing ring is large enough, so that the free loading grain cannot be damaged. and due to the fact that the grain pressing spring is fixed in the grain pressing spring guide pipe, the phenomenon that the grain pressing spring is brought out of the engine by fuel gas in the working process of the engine to cause abnormality to the internal trajectory in the engine can be avoided.

Description

technical field [0001] The invention relates to the technical field of solid rocket motor charging, in particular to a solid rocket motor free-loading charge column pressing structure and a method of use. Background technique [0002] In solid rocket motors with free-filling grains, the grains are free within the motor. Therefore, the grain column must be fixed at the front and rear ends of the grain column. At the same time, the length change of the grain column at high and low temperatures must be considered. Generally, the rear end is fixed with a rigid drug retaining structure, and the front end is mostly fixed with an elastic support structure to adapt to the grain. Thermal expansion stress at high and low temperatures. The elastic elements of the front-end elastic support structure mostly use springs. However, the springs are easy to break and fall off during the working process of the engine. The falling off process will cause abnormal ballistic curves in the engine ...

Claims

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Application Information

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IPC IPC(8): F02K9/24F02K9/34F02K9/10
CPCF02K9/24F02K9/34F02K9/10
Inventor 刘冬梅王锋马东亚张文雨赵倩倩吴建伟冯易周周志勇李阳阳贾致
Owner 南阳北方向东工业有限公司