Bonding tool for rocket engine jet pipe blanking cap

Abstract

The utility model discloses a rocket engine jet pipe blanking cap bonding tool which comprises a cover plate with a threaded hole in the center, a pressing rod connected to the threaded hole in the center of the cover plate in a threaded mode and a pressing block fixed to the front end of the pressing rod through a screw. A positioning face matched with the rear end face of the blanking cap is machined on the front end face of the pressing block. An annular connecting part with threads is forwards machined at the outer edge of the cover plate, and the internal threads of the annular connecting part of the cover plate are matched with the external threads at the outer edge of the rear end of the spray pipe; the cover plate is fixed to the rear end of the spray pipe through the annular connecting part, the pressing block at the front end of the pressing rod is made to forwards abut against the rear end face of the blocking cover by rotating the pressing rod, and the blocking cover is made to be pressed and fixed to the inner wall of the expansion section of the spray pipe. The bonding tool ensures that the bonding tool is completely attached to the matching surface of the blanking cap, and the problem that the blanking cap is difficult to bond is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a rocket engine nozzle plug bonding tool belongs to the field of missile technology. BACKGROUND

[0002] The nozzle of the solid rocket engine is generally designed with a plug. Firstly, the plug plays a role of moisture-proof and sealing, ensures the engine in a sealed state during transportation and storage, prevents external air from entering the combustion chamber to cause the propellant to be damp, and affects the service life. It can also avoid the entry of salt mist, alkali and acid gas into the engine to cause erosion and aging of the charge. It prevents water vapor at low temperature from entering the engine and condensing on the surface of the propellant, increasing the ignition delay time and even causing combustion failure or abnormal combustion. Secondly, the plug is beneficial to help build pressure during the initial operation of the rocket engine, ensure the reliable ignition of the rocket engine, reduce the ignition delay time, and thus improve the ignition reliability. Thirdly, the nozzle plug can reduce the ignition disturbance at a suitable opening pressure, and avoid thrust eccentricity caused by disturbance.

[0003] Therefore, in the structural design of the solid rocket engine plug, in order to ensure the sealing reliability of the plug, in addition to the material, installation position and opening pressure, the assembly process is also particularly important.

[0004] A certain solid rocket engine plug has a hemispherical structure, and the edge of the plug is a positioning conical surface matched with the expansion section of the engine nozzle. During installation, the edge of the plug is first coated with glue and then placed in position, so that the edge of the plug is tightly fitted. A pressure greater than the axis of the nozzle is applied to the plug for a certain period of time to ensure reliable bonding between the plug and the nozzle expansion section. Since the installation position of the plug is located inside the nozzle, the existing technology cannot provide reliable pressure to the plug, which will affect the bonding quality of the plug and the nozzle. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a rocket engine nozzle plug bonding tool.

[0006] The utility model aims at achieving the following technical scheme:

[0007] The utility model discloses a rocket engine nozzle plug bonding tool, which comprises a center threaded hole cover plate, a pressure rod connected to the center threaded hole of the cover plate through threads, and a pressure block fixed to the front end of the pressure rod through a screw.

[0008] A positioning surface matched with the rear end surface of the plug is formed on the front end surface of the pressure block.

[0009] A threaded annular connecting part is formed forwardly on the outer edge of the cover plate, and the internal thread of the annular connecting part of the cover plate is matched with the external thread of the rear end outer edge of the nozzle.

[0010] The cover plate is fixed at the rear end of the nozzle through the annular connecting part, the pressing block at the front end of the pressing rod is tightly pressed against the rear end surface of the plug cover by rotating the pressing rod, and the plug cover is tightly pressed and fixed in the inner wall of the nozzle expansion section.

[0011] The rear end of the pressing rod is fixed with a handle, and the pressing rod is driven to rotate through the handle.

[0012] Beneficial effects:

[0013] The adhesive tool of the utility model adopts screw connection, is simple in assembly, and the pressing rod structure can rotate flexibly, the coaxiality of the plug cover and the nozzle can be ensured when the plug cover is tightly pressed, the concave surface design of the pressing block can ensure complete adhesion with the plug cover matching surface, the plug cover is uniformly stressed, linear contact is prevented, the adhesive quality of the plug cover is affected, and the problem of difficult plug cover adhesion is solved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structure schematic view of the adhesive tool of the utility model;

[0015] In the figure, 1 is a plug cover, 2 is a pressing block, 3 is a screw, 4 is a pressing rod, 5 is a nozzle, and 6 is a cover plate. DETAILED DESCRIPTION

[0016] The content of the utility model will be further described in combination with the drawings and embodiments:

[0017] Embodiment

[0018] As Figure 1 shown, the utility model relates to a kind of rocket engine nozzle plug cover adhesive tool, including center with threaded hole cover plate 6, threaded connection in the threaded hole of the center of the cover plate 6 pressing rod 4, pressing block 2 is fixed in the front end of the pressing rod 4 by screw 3;

[0019] The front end surface of the pressing block 2 is processed with matching positioning surface with the rear end surface of the plug cover 1;

[0020] The outer edge of the cover plate 6 is forwardly processed with annular connecting part with thread, and the internal thread of the annular connecting part of the cover plate 6 is matched with the external thread at the outer edge of the rear end of the nozzle 5;

[0021] The cover plate 6 is fixed at the rear end of the nozzle 5 through the annular connecting part, the pressing block 2 at the front end of the pressing rod 4 is tightly pressed against the rear end surface of the plug cover 1 by rotating the pressing rod 4, and the plug cover 1 is tightly pressed and fixed in the inner wall of the nozzle 5 expansion section.

[0022] The rear end of the pressing rod 4 is fixed with a handle, and the pressing rod 4 is driven to rotate through the handle.

Claims

1. A rocket engine nozzle closure bonding tool, characterized by: It comprises a center threaded hole cover plate, a pressure rod threaded in the center threaded hole of the cover plate, and a pressing block fixed on the front end of the pressure rod by a screw; The front end surface of the pressing block is processed with a matching positioning surface with the rear end surface of the plug; The outer edge of the cover plate is processed with a threaded annular connecting part forwardly, and the inner thread of the annular connecting part of the cover plate matches the outer thread of the rear end outer edge of the nozzle; The cover plate is fixed on the rear end of the nozzle through the annular connecting part, the pressing block at the front end of the pressure rod is tightly pressed against the rear end surface of the plug by rotating the pressure rod, and the plug is tightly pressed and fixed in the inner wall of the nozzle expansion section.

2. A bonding tool for a rocket engine nozzle closure as defined in claim 1, wherein: The rear end of the pressure rod is fixed with a handle, and the pressure rod is driven to rotate by the handle.

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