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A kind of threading hole sealing device and sealing method for negative pressure device

A technology of negative pressure device and sealing device, applied in the field of wind tunnel test, can solve the problems of poor sealing and poor stability, and achieve the effects of increased sealing performance, good sealing effect and great applicability

Active Publication Date: 2021-12-21
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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  • A kind of threading hole sealing device and sealing method for negative pressure device
  • A kind of threading hole sealing device and sealing method for negative pressure device
  • A kind of threading hole sealing device and sealing method for negative pressure device

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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 present invention is applicable to the technical field of wind tunnel test, and provides a threading hole sealing device and a sealing method for a negative pressure device, including a mounting sleeve and a connecting piece; the mounting sleeve is a hollow circular platform structure, and includes symmetrically arranged first mounting sleeves The main body and the second installation sleeve main body, the first installation sleeve main body and the second installation sleeve main body are hinged; the inside of the installation sleeve is provided with a partition; The left partition and the right partition are composed; and the partition is provided with threading holes; the main bodies of the first installation sleeve and the second installation sleeve are provided with connecting parts. The sealing device of the present invention is a circular platform structure, the diameter of the small end is smaller than the diameter of the reserved threading hole, the small end of the installation sleeve is pushed into the reserved threading hole, and the sealing performance increases with the increase of the negative pressure in the negative pressure device during the test .

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 Patents(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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