Flexible joint used at wide temperature range and flexible spray pipe

A technology of flexible joints and flexible nozzles, applied in jet propulsion devices, rocket engine devices, machines/engines, etc., can solve problems such as difficult bonding, reduced reliability of flexible joints, and inability to meet the requirements of wide temperature environments

Active Publication Date: 2021-07-06
THE GENERAL DESIGNING INST OF HUBEI SPACE TECH ACAD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, at present, none of the traditional metal reinforcements can meet the requirements of wide temperature environments, and it is urgent to develop composite reinforcements that meet the requirements of wide temperature environments.
Composite material reinforcements are different from the application conditions of composite flat material parts made by traditional process design methods. The stress directions of traditional composite flat materials are mainly stretching and compression along the plane direction and bending perpendicular to the plane direction. It is the tensile stress, which cannot well meet the complex and variable shear stress and bending moment requirements in the actual application conditions. Therefore, the structural stiffness and force transmission function of the flexible joint cannot be satisfied according to the traditional composite plate material design method.
[0006] Furthermore, although the current traditional silicone rubber elastic material has stable shear performan

Method used

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  • Flexible joint used at wide temperature range and flexible spray pipe
  • Flexible joint used at wide temperature range and flexible spray pipe
  • Flexible joint used at wide temperature range and flexible spray pipe

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Embodiment Construction

[0030] The technical solutions of the present application will be clearly and completely described below in conjunction with specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present application.

[0031] Such as figure 1 As shown, the application discloses an embodiment of a flexible joint for wide temperature use, including a front flange 12, a rear flange 11, a multi-layer elastic member 13 and a multi-layer reinforcement 14, the front flange 12 and the rear flange 11 They are connected by multi-layer elastic parts 13 and multi-layer reinforcement parts 14 .

[0032]The elastic part 13 is made of a special addition-type liquid silicone rubber material with excellent low-temperature pe...

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Abstract

The invention relates to the field of solid rocket engines, and discloses a flexible joint used at wide temperature range. The flexible joint comprises a front flange, a rear flange, multiple layers of elastic pieces and multiple layers of reinforcing pieces, and the front flange and the rear flange are connected through the multiple layers of elastic pieces and the multiple layers of reinforcing pieces; each elastic piece is made of an addition type liquid silicone rubber material; each reinforcing piece is made of a high-strength carbon/phenolic aldehyde composite material; the elastic pieces and the reinforcing pieces are both of a spherical annular sheet structure, and the multiple layers of reinforcing pieces and the multiple layers of elastic pieces are alternately bonded; and the shortest arc length of one reinforcing piece is larger than that of one elastic piece, and the portion, longer than one elastic piece, of one reinforcing piece is filled with dynamic sealing unvulcanized putty. According to the flexible joint used at wide temperature range and a flexible spray pipe, the stability and the safety performance of the elastic pieces and the reinforcing pieces are better, and better environmental adaptability is achieved.

Description

technical field [0001] The application relates to the technical field of solid rocket motors, in particular to a flexible joint and a flexible nozzle for wide temperature use. Background technique [0002] At present, solid rocket motors have the advantages of good safety, high reliability, good storage performance, high specific impulse density and convenient service handling. They have become the main power device in the missile field and are also widely used in the aerospace field. The flexible nozzle is one of the key components of the solid rocket motor, and it is a device for the energy conversion of the engine and the realization of thrust vector control. It is usually composed of a movable body, a fixed body, a flexible joint and an actuator. As the core component of the flexible nozzle, the flexible joint achieves the purpose of swinging the flexible nozzle through the deformation of the flexible joint. [0003] The flexible joint is composed of four parts: front f...

Claims

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Application Information

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IPC IPC(8): F02K9/32F02K9/97
CPCF02K9/32F02K9/97
Inventor 徐节荣周子翔许玉荣祝珊任孝宇吕轩
Owner THE GENERAL DESIGNING INST OF HUBEI SPACE TECH ACAD
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