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Airtightness test connecting device for protecting valve nozzle with processed surface

A technology for air tightness test and connection device, which is used in measuring device, fluid tightness test, machine/structural component test, etc. It can solve problems such as failure and abnormal rocket launch, and achieve the goal of preventing valve scrap and improving connection strength. Effect

Active Publication Date: 2019-01-04
XIAN SPACE ENGINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As aerospace products are developing in the direction of high precision, any defect may cause abnormalities in the launch of the rocket, or even lead to failure, so it is necessary to ensure that each part is in a normal state and meets the performance requirements

Method used

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  • Airtightness test connecting device for protecting valve nozzle with processed surface
  • Airtightness test connecting device for protecting valve nozzle with processed surface
  • Airtightness test connecting device for protecting valve nozzle with processed surface

Examples

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0022] The invention provides an airtight test connection device for protecting the surface-treated valve nozzle, which can effectively ensure that the surface of the valve nozzle is not damaged by the thread of the test nozzle, and protect the integrity of the film layer on the surface of the nozzle.

[0023] like figure 1 Shown is a schematic diagram of an airtight test connection device. It can be seen from the figure that an airtight test connection device used to protect the valve nozzle after surface treatment includes a screw core 1, a screw sleeve 2 and an outer nut 3; among them, the screw core 1 It is a hollow stepped columnar structure; the screw sleeve 2 is a hollow stepped columnar structure; the outer casing nut 3 is a hollow columnar structure with a groove inside; the screw sleeve 2 is fixedly set on the outer wall of the screw c...

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Abstract

The invention relates to an airtightness test connecting device for protecting a valve nozzle with a processed surface and relates to the field of the protection of important control parts in a rocketengine. The device comprises a screw core, a screw sleeve and an outer sleeve nut. The screw core is a hollow stepped columnar structure, and the screw sleeve is a hollow stepped columnar structure.The outer sleeve nut is a hollow columnar structure with a C-shaped section. The screw sleeve fixedly sleeves an outer wall of the screw core, and a step of the screw sleeve is engaged with a step ofthe screw core. The outer sleeve nut sleeves an outer wall of the screw sleeve from an opening end direction, and an opening end of the outer sleeve nut is engaged with a step of the screw sleeve. Thescrew core and the screw sleeve are matched and connected by a thread. Two ends of the airtightness test connecting device are connected to an external test bench joint and a valve airtight nozzle with a processed external surface. According to the airtightness test connecting device, a condition that the surface of the valve airtight nozzle is not damaged by a test stand nozzle thread is effectively ensured, and the integrity of a nozzle surface film layer is protected.

Description

technical field [0001] The invention relates to the field of protection of important control components in rocket engines, in particular to an airtight test connection device used to protect valve joints after surface treatment. Background technique [0002] The valve is an important control part in the rocket engine, and its quality directly affects the success or failure of the spacecraft launch. Each valve must be reliable and effective in the flight environment before it is installed in the rocket engine, so the valve must be tested for air tightness inspection and other tests. However, in order to ensure the corrosion resistance of the surface of valve parts and components, a dense film layer needs to be added on the surface of some parts and components to ensure that no corrosion effect occurs between the external environment and oxidants. During the airtight test of the valve, the stainless steel airtight nozzle of the test bench is connected to the airtight nozzle o...

Claims

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Application Information

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IPC IPC(8): G01M3/02
CPCG01M3/025
Inventor 赵保科张勇峰郭研王召杨生旭
Owner XIAN SPACE ENGINE CO LTD
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