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A sealing method for a piston-type explosive actuating device

An actuating device and piston-type technology, which is applied to the sealing of engines, docking devices of aerospace vehicles, motor vehicles, etc., can solve the problem of low sealing reliability of piston-type explosive actuating devices, and achieve reliable and effective sealing redundant design , Increase sealing performance, enhance the effect of anti-explosion sealing ability

Active Publication Date: 2018-09-18
BEIJING INST OF SPACECRAFT SYST ENG
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  • Claims
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AI Technical Summary

Problems solved by technology

[0008] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a sealing method for the piston-type explosive actuating device, and to solve the problem of low sealing reliability of the piston-type explosive actuating device

Method used

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  • A sealing method for a piston-type explosive actuating device

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Embodiment Construction

[0026] like figure 1 Shown, the sealing method of the piston type explosive actuator that the present invention proposes is:

[0027] (1) The first step adopts the radial piston sealing form, and designs two identical sealing grooves on the piston. The piston is used as the base body of the two O-ring seals, and adopts the integrated design idea of ​​sealing and actuating parts. The traditional sealing form is in accordance with the "O-ring rubber seal selection and seal chamber design specification QJ1035.2-86" , Two sealing grooves are designed directly on the piston for installing two O-rings.

[0028] (2) The second step is to add a "explosion relief groove" with a width of 0.5mm to 1mm and a depth of 1mm to 2mm between the two sealing grooves of the piston. The function of this step is: after the explosion of the propellant and explosives, high temperature and high pressure detonation gas is formed. If the first O-ring does not block the detonation gas, it will pass thr...

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Abstract

The invention discloses a sealing method for a piston-type explosion actuating device. The sealing method comprises the steps that (1) a radial piston sealing mode is adopted, and two same sealing grooves are designed in a piston; (2) an explosion releasing groove with the width being 0.5-1 mm and the depth being 1-2 mm is additionally formed between the two sealing grooves of the piston; (3) according to the working temperature of the device, materials of durable O-shaped sealing rings are selected, and each O-shaped sealing ring is placed in the corresponding sealing groove; (4) a non-metallic gasket is additionally arranged between the piston and an explosive, and the diameter size of the non-metallic gasket is the same as the outer diameter of the piston; and (5) the non-metallic gasket and the end face, close to the direction of the explosive, of the piston are attached and pasted through a GD-414 adhesive. According to the method, based on the ideas of explosion product preset filling and explosion pressure releasing, the sealing reliability of the explosion actuating device is effectively improved, and product safety can further be improved.

Description

Technical field [0001] The invention relates to a sealing method of a piston type explosive actuator. Background technique [0002] The piston explosive device is an important spacecraft technology. It is mainly used as a power source to realize the separation function between the spacecraft body and components, between cabin sections, and between the spacecraft and the launch vehicle. It can also realize the load according to specific needs. Or the device’s on-orbit unlocking and release capabilities. [0003] Generally speaking, the basic composition of piston explosive devices is similar, usually consisting of ignition components, main charges and piston moving parts. Among them, piston moving parts are usually designed with O-ring seals to provide sealing for the high-pressure environment established during the explosive explosion process. Once the sealing ring does not play a sealing role and explosive gas leakage occurs, it will seriously affect the function of the de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42B3/00F42B3/24F16J15/32B64G1/64
CPCB64G1/645F16J15/32F42B3/006F42B3/24
Inventor 叶耀坤丁锋祁玉峰史文华李委托陈祥伟从强王文龙孙国鹏李潇王波
Owner BEIJING INST OF SPACECRAFT SYST ENG
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