Threading hole sealing device and sealing method for negative pressure device

A negative pressure device and sealing device technology, which is applied in the direction of engine sealing, electrical components, engine components, etc., can solve the problems of poor stability and poor sealing performance, and achieve good sealing effect, increased sealing performance and great applicability Effect

Active Publication Date: 2021-11-12
LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Practice has shown that the main parts of the gas leakage during the low-density test in the wind tunnel are the threading hole and the drainage pipe, and the drainage pipe can be sealed by controlling the valve. There is currently no general sealing device for the sealing of the threading hole, and plugging is often used. mud for sealing, but the sealing performance of this sealing method is poor and the stability is not good

Method used

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  • Threading hole sealing device and sealing method for negative pressure device
  • Threading hole sealing device and sealing method for negative pressure device
  • Threading hole sealing device and sealing method for negative pressure device

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Embodiment 1 provides a sealing device for threading holes in a vacuum wind tunnel, such as figure 1 As shown, it includes a mounting sleeve 10 and a connecting piece (not shown in the figure); the mounting sleeve 10 is a hollow circular truncated structure, including a first mounting sleeve main body 11 and a second mounting sleeve main body 12 arranged symmetrically. An installation sleeve main body 11 and a second installation sleeve main body 12 are hinged; the inside of the installation sleeve 10 is provided with a first partition 13; the first partition 13 is respectively arranged on the first installation sleeve main body 11 and the second installation sleeve The first left partition and the first right partition on the inner surface of the two installation sleeve main bodies 12 are composed; 10 coaxial; the first mounting sleeve main body 11 is provided with a first connecting portion 161; the second mounting sleeve main body 12 is provided with a second connect...

Embodiment 2

[0052] This embodiment also provides a sealing device for threading holes used in a vacuum wind tunnel. The difference from Embodiment 1 is that a second partition 14 is also provided in the installation sleeve of the sealing device 1 in this embodiment, such as figure 2 shown.

[0053] In this embodiment, a second partition 14 is also provided on the inner surface of the installation sleeve 10, and the second partition 14 divides the entire interior space of the installation sleeve 10 into a first accommodating space 20 and a second accommodating space 30 The first accommodating space 20 is the space between the first partition 13 and the second partition 14; the other part is the second accommodating space; the second partition 14 is provided with the first Two threading holes 141 , the second threading hole 141 is coaxial with the first threading hole 131 and the installation sleeve 10 .

[0054] In this embodiment, the installation position of the second partition 14 is ...

Embodiment 3

[0057] This embodiment provides a method for sealing the threading hole of a vacuum wind tunnel, using the sealing device as in Embodiment 1 for sealing, and the flow of the specific sealing method is as follows Figure 4 shown.

[0058] S10. Fill the sealing plugging mud into the internal accommodation space of the first installation sleeve main body 11 and the second installation sleeve main body 12;

[0059] In this embodiment, the sealing mud is filled into the accommodating space surrounded by the side wall between the first left partition and the bottom end of the first installation sleeve main body 11, and the first right partition and the second installation sleeve main body. In the accommodating space enclosed by the side walls between the bottom ends of 12;

[0060] Rotate and separate the first installation sleeve main body 11 and the second installation sleeve main body 12 of the sealing device 10, exposing the internal accommodation space of the first installatio...

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Abstract

The invention is applicable to the technical field of wind tunnel tests, and provides a threading hole sealing device and sealing method for a negative pressure device. The threading hole sealing device comprises a mounting sleeve and a connecting piece, wherein the mounting sleeve is of a hollow circular truncated cone structure and comprises a first mounting sleeve main body and a second mounting sleeve main body which are symmetrically arranged, and the first mounting sleeve main body is hinged with the second mounting sleeve main body; the mounting sleeve is internally provided with a partition plate; the partition plate is composed of a left partition plate and a right partition plate which are respectively arranged at the inner side surfaces of the first mounting sleeve main body and the second mounting sleeve main body; the partition plate is provided with a threading hole; and the main bodies of the first mounting sleeve and the second mounting sleeve are provided with connecting parts. The sealing device provided by the invention is of a circular truncated cone structure, the diameter of the small end is less than the diameter of a reserved threading hole, the small end of the mounting sleeve is pushed into the reserved threading hole, and the sealing performance is increased along with the increase of negative pressure in the negative pressure device in the test process.

Description

technical field [0001] The invention relates to the technical field of wind tunnel tests, in particular to a threading hole sealing device and a sealing method for a negative pressure device. Background technique [0002] Wind tunnel test refers to an aerodynamic experimental method that places aircraft or other object models in a wind tunnel to study gas flow and its interaction with the model to understand the aerodynamic characteristics of actual aircraft or other objects. [0003] There are many threading holes reserved in the wind tunnel for laying equipment such as measurement, power, lighting, cooling, and lubrication inside and outside the tunnel. It is necessary to connect cables or pipes through the threading holes, and to ensure that the tunnel has good ventilation when conducting low-density tests. When the low-density test is not carried out, try to ensure that there is no pressure difference between the inside and outside of the hole. Practice has shown that t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/10H02G3/22
CPCF16J15/102F16J15/104H02G3/22
Inventor 张轲张平涛孙才国罗英杰吕波李自雨
Owner LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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