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Side door opening/closing mechanism for hypersonic velocity wind tunnel test section

A wind tunnel test, hypersonic technology, applied in the field of machinery, can solve the problems of reducing the service life and reliability of the side door, air overflow, side door vibration, etc., to achieve the effect of a large pressure range, reliable vacuum sealing, and guaranteeing sealing.

Inactive Publication Date: 2014-01-01
BEIJING AEROSPACE YISEN WIND TUNNEL ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the existing scheme is that it is difficult to ensure the internal pressure strength and vacuum sealing ability of the side door at the same time. In order to ensure the vacuum sealing, enough clearance must be reserved between the door shaft and the locking pin to compensate for the compression deformation of the rubber sealing ring, but this clearance When the inside of the test section is in a positive pressure state, it will cause the airflow to overflow and cause the side door to vibrate, reducing the service life and reliability of the side door

Method used

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  • Side door opening/closing mechanism for hypersonic velocity wind tunnel test section
  • Side door opening/closing mechanism for hypersonic velocity wind tunnel test section
  • Side door opening/closing mechanism for hypersonic velocity wind tunnel test section

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Embodiment Construction

[0022] The principles and features of the present invention will be described below in conjunction with the accompanying drawings.

[0023] Such as figure 1 , figure 2 As shown, the present invention provides a side door opening and closing mechanism of a hypersonic wind tunnel test section, which is characterized in that it includes: a side door frame 1, a side door 2, a guide rail 8, a fixing seat 9, a hydraulic cylinder bracket 10, a hydraulic cylinder 11, a wire Bar fixing seat 12, screw nut 13, lead screw 14, coupling 15, motor 16, pull rod 17, hook 18 and opening and closing module;

[0024] The opening and closing module includes a spring 3, a slider connector 4, a nut 5, a bolt 6 and a slider 7; there is a sealing ring between the side door 2 and the side door frame 1. Spring 3 is a compression spring that provides thrust.

[0025] Such as image 3 As shown, four L-shaped hooks 18 are fixed at the four corners of the same side of the side door 2, and each L-shaped...

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Abstract

A side door opening / closing mechanism for a hypersonic velocity wind tunnel test section. Hydraulic cylinders and springs act on a side door together to make the side door move in the direction perpendicular to a door frame so as to ensure that the side door and the door frame are sealed. A motor and a ball screw act on the side door together to make the side door move in the horizontal direction so as to open or close the side door. When positive pressure exists in the hypersonic velocity wind tunnel test section, pressing force applied on the side door is provided by the hydraulic cylinders, and the number and specification of the hydraulic cylinders can be adjusted according to the value of the pressure in the hypersonic velocity wind tunnel test section so that the side door opening / closing mechanism can be adapted to a wide pressure-bearing range; when the inside of the hypersonic velocity wind tunnel test section is in a vacuum state, the hydraulic cylinders push the side door so that the side door can be attached to the side door frame, quite high pressing force is not needed, and the side door can be sealed through self suction. The side door opening / closing mechanism is wide in pressure-bearing range and capable of realizing both internal pressure seal and vacuum seal, thereby meeting operating requirements of the hypersonic velocity wind tunnel test section and being capable of being popularized to other equipment for use.

Description

technical field [0001] The invention relates to an opening and closing mechanism for a side door of a hypersonic wind tunnel test section, which belongs to the field of machinery. Background technique [0002] The wind tunnel test section is one of the core components of the hypersonic wind tunnel. Its front end is connected to the nozzle, and its rear end is connected to the second throat. The test section is equipped with a diffuser, a model support mechanism and some auxiliary devices. In order to ensure the safety of the wind tunnel test, two states of internal pressure and vacuum should be considered when designing the test section. As an important personnel and logistics channel, the side door of the test section also has the above two stress states. Since the side door is a moving part and has a large structural size, the design of the side door has brought great challenges to the design of the side door while ensuring internal pressure strength and vacuum tightness. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/04
Inventor 孙涛董国强石运军卜俊辉
Owner BEIJING AEROSPACE YISEN WIND TUNNEL ENG TECH
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