Bonding method for jet pipe and flexible plug cover of solid rocket engine and sealing tool

Abstract

The invention discloses a bonding method for a jet pipe and a flexible plug cover of a solid rocket engine, and a sealing tool. The bonding method includes the steps that after the flexible plug cover and a jet pipe throat lining are bonded in advance, the sealing tool is mounted on the jet pipe, and the flexible plug cover and the sealing tool are matched to form a first sealed space area; and the first sealed space area is pressurized, the external molded surface of the bonding surface between the flexible plug cover and the jet pipe throat lining is pressurized in an air-pressure mode, and finally, pressure-maintaining solidification is carried out. By utilizing the non-directionality of air pressure, air pressure is applied to the flexible plug cover and acts on the external molded surface of the bonding surface, all points on the bonding surface are subjected to normal-direction stressing, surface-contact uniform stressing of the bonding surface is achieved, and therefore the bonding quality is improved; and in addition, the method is simple, operation is convenient, the period is short, the cost is low, and the bonding method is especially suitable for bonding of the jet pipe and the flexible plug cover of the large-diameter solid rocket engine.

Description

technical field [0001] The invention belongs to the technical field of forming a solid rocket motor nozzle, and in particular relates to a bonding method and a sealing tool for a solid rocket motor nozzle and a flexible blocking cover. Background technique [0002] The nozzle is an important part of the solid rocket motor. When assembling the nozzle of the solid rocket motor, the flexible plug 11 and the throat liner 10 of the nozzle need to be bonded and solidified, and then the air tightness test is carried out. The bonding method of flexible plugging cap and nozzle throat liner in the prior art, such as figure 1 As shown, the pressure block 9 is used to cooperate with the bonding surface of the flexible plug, and a weight is added to the pressure block 9 or a manual press is used to pressurize it, and then it is cured at room temperature. [0003] Since the bonding surface of the flexible plug and the throat liner of the nozzle is a curved surface, in the bonding method ...

AI Technical Summary

Problems solved by technology

[0003] Since the bonding surface of the flexible plug and the throat liner of the nozzle is a curved surface, in the bonding method of the flexible plug in the prior art, it is difficult to completely cooperate with the press-fitting surface of the pressing block and the flexible plug, and the bonding surface is affected. The direction of the force is single, and the pressure of the bonding surface is uneven, which is easy to produce line contact pressure, which leads to a low pass rate of the bonding between the flexible plug and the throat liner of the nozzle, and frequent air leakage, which seriously affects the production efficiency

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