CN210715915U - Airtight gasket of aircraft oxygen pipeline - Google Patents
Airtight gasket of aircraft oxygen pipeline Download PDFInfo
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- CN210715915U CN210715915U CN201920829902.4U CN201920829902U CN210715915U CN 210715915 U CN210715915 U CN 210715915U CN 201920829902 U CN201920829902 U CN 201920829902U CN 210715915 U CN210715915 U CN 210715915U
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- gasket
- oxygen
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- pipeline
- joint
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Abstract
The application discloses aircraft oxygen pipeline airtight packing ring, packing ring are circular truncated cone shell structure, and its inner surface and aircraft oxygen pipe joint cooperation, its surface and oxygen pipe flaring face cooperation, packing ring install between aircraft oxygen pipe joint and oxygen pipe flaring face.
Description
Technical Field
The application relates to the technical field of aircraft assembly, in particular to a gasket for ensuring air tightness during installation of an oxygen pipeline joint of an aircraft.
Background
When the oxygen conduit is installed, the fixed force is strictly required to be regulated according to the HB 4-1-2002, and the conduit outer sleeve nut is strictly prevented from being excessively tightened. When a segmented oxygen system air-tight test is carried out, air leakage faults at the joint of a conduit joint often occur, particularly, the air leakage phenomenon of the conduit with the diameter of 16mm multiplied by 1 is more serious, the air leakage rate of the conduit with the diameter of 16mm multiplied by 1 of the whole machine is up to 65%, and the air leakage faults are difficult to remove by increasing the tightening torque and can only be removed by replacing a pipeline and an adapter after the air leakage faults occur. In this case, not only the production schedule is delayed, but also a large amount of material is wasted.
At present, no good method exists for the air tightness of a 74-degree flared pipeline, and the method for ensuring the air tightness refers to the connection of flange type guide pipes, namely a layer of rubber gasket is added between flange plates, and the air tightness of the butt joint of the flange plates is ensured by extruding the rubber gasket; therefore, the connection of a 74-degree flared pipeline can be realized in a similar manner, but due to different connection modes of the guide pipes, if softer materials such as rubber pads are added between the flared surface of the guide pipe and the pipe joint, the rubber pads are easily crushed to enter the pipeline in the installation process, so that redundant materials are generated, the rubber pads are easily displaced in the tightening process of the guide pipe (the flared surface and the conical surface of the pipe joint are inclined surfaces, the rubber pads are softer, and the shape cannot be maintained), and the air tightness of the pipeline cannot be ensured.
Disclosure of Invention
In order to solve the above problem, the present application provides an aircraft oxygen line gas seal gasket.
The technical scheme is as follows: the air-tight gasket for the oxygen pipeline of the airplane is of a cone frustum shell structure, the inner surface of the gasket is matched with an oxygen pipe joint of the airplane, the outer surface of the gasket is matched with a flaring surface of an oxygen guide pipe, and the gasket is arranged between the oxygen pipe joint of the airplane and the flaring surface of the oxygen guide pipe. The material of the gasket is 3A 21-O, the thickness of the gasket is 0.5mm, and the height of the gasket is 2.7 mm.
The beneficial effects are that: the gasket is a hard gasket, after the gasket is arranged between the flaring surface of the guide pipe and the conical surface of the joint, the outward-expanding nut of the guide pipe is tightened to enable the gasket to generate plastic deformation to make up for the defects on the flaring surface of the guide pipe and the conical surface of the joint, namely the reason for generating an air leakage point, and meanwhile, partial stress at the joint of the joint can be eliminated after the gasket generates plastic deformation.
Drawings
FIG. 1 is a schematic view of a gasket structure
FIG. 2 gasket installation schematic
The numbering in the figures illustrates: 1. a pipeline; 2. an oxygen conduit flared surface; 3. a gasket; 4. an aircraft oxygen tube joint.
Detailed Description
Take the process of the air tightness test of the aircraft product in the oxygen system as an example.
As shown in fig. 1 and 2, the gasket 3 is a truncated cone shell structure, the inner surface of the gasket is matched with the oxygen pipe joint 4 of the aircraft, the outer surface of the gasket is matched with the oxygen conduit flaring surface 2, and the gasket 3 is installed between the oxygen pipe joint 4 of the aircraft and the oxygen conduit flaring surface 2. The material of the gasket 3 was 3A 21-O, the thickness was 0.5mm, and the height was 2.7 mm.
The using process is as follows:
(1) connecting and disconnecting the oxygen system air tightness test pipeline 1 according to the assembly instruction requirement, inflating the pipeline 1 by using an oxygen system air tightness test bed, and simultaneously checking and recording the position of an air leakage point;
(2) decomposing the part of the detected air leakage point, adding a gasket between the flaring surface 2 of the oxygen conduit and the conical surface of the oxygen pipe joint 4 of the airplane, and performing constant force according to the specified value of HB 4-1-2002;
(3) and (5) inflating the pipeline 1 by using the airtight test bed of the oxygen system again, and checking whether the position of the air leakage point of the gasket 3 leaks air or not.
Claims (4)
1. The airtight gasket for the oxygen pipeline of the airplane is characterized in that the gasket is of a cone frustum shell structure, the inner surface of the gasket is matched with an oxygen pipe joint of the airplane, the outer surface of the gasket is matched with a flaring surface of an oxygen guide pipe, and the gasket is arranged between the oxygen pipe joint of the airplane and the flaring surface of the oxygen guide pipe.
2. The aircraft oxygen line hermetic gasket of claim 1, wherein the material of the hermetic gasket is 3a 21-O.
3. An aircraft oxygen line gasket as claimed in claim 1, wherein the gasket has a thickness of 0.5 mm.
4. An aircraft oxygen line gas-tight gasket as claimed in claim 1, wherein the height of the gas-tight gasket is 2.7 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920829902.4U CN210715915U (en) | 2019-06-03 | 2019-06-03 | Airtight gasket of aircraft oxygen pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920829902.4U CN210715915U (en) | 2019-06-03 | 2019-06-03 | Airtight gasket of aircraft oxygen pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210715915U true CN210715915U (en) | 2020-06-09 |
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ID=70933356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920829902.4U Active CN210715915U (en) | 2019-06-03 | 2019-06-03 | Airtight gasket of aircraft oxygen pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210715915U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233970A (en) * | 2021-12-21 | 2022-03-25 | 北京星航机电装备有限公司 | Connecting piece of standard flared pipe, preparation method of connecting piece and standard flared pipe |
-
2019
- 2019-06-03 CN CN201920829902.4U patent/CN210715915U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233970A (en) * | 2021-12-21 | 2022-03-25 | 北京星航机电装备有限公司 | Connecting piece of standard flared pipe, preparation method of connecting piece and standard flared pipe |
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