Safety valve used for solid rocket engine broad pressure range
A pressure range, solid rocket technology, applied in the direction of rocket motor devices, machines/engines, mechanical equipment, etc., can solve the problems of complex adjustment methods of working pressure range, complex structure of safety valve, etc. Simple, flexible effect changes
Inactive Publication Date: 2018-03-06
SHANGHAI XINLI POWER EQUIP RES INST
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Problems solved by technology
[0004] The structure of the existing safety valve is complicated, and the adjustment method of the working pressure range is complicated
Method used
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Embodiment Construction
[0011] In the implementation process of the present invention, the figure 1 The safety valve piston 3 is installed in the safety valve nut 1, the safety valve piston is equipped with a sealing ring, the safety valve piston 3 and the safety valve nut 1 are fixed by the pin 2, and the fixing method can be selected by inserting all the pins 2 into the safety valve piston 3 Or choose to insert the 2 pin part into the 3 safety valve piston, select the insertion depth according to the design pressure, and finally paste the heat insulation layer 4 on the bottom of the safety valve assembly.
[0012] When the pressure in the solid rocket motor combustion chamber is abnormal, figure 1 The middle safety valve piston 3 will shear the pin 2 under the action of pressure, and the pin 2 will break after receiving the shear force, the safety valve piston 3 will be separated from the safety valve nut 1, and the engine combustion chamber will be depressurized to keep the pressure in the engine ...
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The invention provides a safety valve structure used for a solid rocket engine. According to the structure, a safety valve nut and a safety valve piston are fixed together through pins, by changing the structural parameters of the mounting number of the pins, the inserting depths of the pins in the safety valve piston, the diameters of the pins and the like and the processing materials of the pins, the open design pressure of a safety valve is changed, the structure is simple, the pressure adjusting mode is simple, convenient and easy to achieve, and the reliability is high; and according to the specific geometric structure of a pressure container, the safety valve and the solid rocket engine can select the connection modes such as threads, pins, clamping keys, check rings and the like, and in order to ensure normal working of the safety valve in the high-temperature environment, heat-insulating layers of the safety valve can select soft heat-insulating layers such as ethylene-propylene-diene monomer or hard heat-insulating layers such as carbon fiber phenolic aldehyde.
Description
technical field [0001] The invention relates to a safety valve for a solid rocket motor, in particular to a safety valve structure for a wide pressure range of the solid rocket motor. Background technique [0002] The safety valve is an automatic pressure release device used on pressure vessels or pipelines. It is a safety device set up to prevent personal and property casualties caused by explosions caused by abnormal pressure conditions in equipment and pressure vessels. It is widely used in power stations, chemical industries, In industries such as petroleum, it is one of the most important safety accessories such as pressure vessels. [0003] The safety valve structures introduced in the current public literature are mostly used in power stations, chemical industries and other industries. The working environment is milder than that of solid rocket motors, and there is no safety valve structure specially used for high-temperature and high-pressure solid rocket motor gas g...
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IPC IPC(8): F02K9/38
CPCF02K9/38
Inventor 李海涛杨永强牛禄王勇周伟华刘晓丽汤玉林
Owner SHANGHAI XINLI POWER EQUIP RES INST