CN115789369A - Carbon dioxide refrigerant loop pipeline connects seal structure - Google Patents
Carbon dioxide refrigerant loop pipeline connects seal structure Download PDFInfo
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- CN115789369A CN115789369A CN202211441596.XA CN202211441596A CN115789369A CN 115789369 A CN115789369 A CN 115789369A CN 202211441596 A CN202211441596 A CN 202211441596A CN 115789369 A CN115789369 A CN 115789369A
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Abstract
The invention relates to a sealing structure of a carbon dioxide refrigerant loop pipeline joint, which comprises a male flange, a female flange and a waveform metal gasket; the male flange body is provided with a sealing boss, a positioning hole and a first bolt fixing hole; a sealing groove, a positioning boss and a second bolt fixing hole are formed in the main flange body; the wave-shaped metal gasket is arranged at the end part of the sealing boss in the sealing groove; the axial center line of the sealing boss is not coincident with the axial center line of the male flange, and the axial center line of the sealing groove is not coincident with the axial center line of the female flange. The sealing structure of the refrigerant loop joint adopts a sealing form combining axial sealing and radial sealing, the radial corrugated metal gasket sealing is used for resisting high pressure and pressure release, and the axial rubber O-shaped ring sealing is used for preventing final low pressure leakage, so that the use of sealing components is effectively reduced, the assembly process is simplified, and the sealing reliability is improved.
Description
Technical Field
The invention belongs to the technical field of automobile air conditioners, and particularly relates to a carbon dioxide refrigerant loop pipeline joint sealing structure.
Background
The sealing forms of the refrigerant pipe joint of the air conditioning system are various, and in a common refrigerant R134a loop, a plurality of sealing rings made of EPDM (ethylene-propylene-diene monomer) materials are used, and the sealing forms are generally divided into radial sealing and axial sealing. With the development of refrigerant technology, carbon dioxide refrigerant (R744) is also increasingly used in automobile thermal management circuits, which puts higher demands on the sealing of the pipe joints because the system pressure of the carbon dioxide refrigerant circuit is 10 times that of R134 a. Obviously, the existing sealing form cannot meet the R744 refrigerant circuit.
In order to overcome the problems, in the prior art, for example, a Vo l kswagen MEB platform adopts an axial sealing mode of a metal gasket to seal an interface of an R744 refrigerant loop, and although the sealing problem of the refrigerant can be solved by the scheme, the interface needs more parts to be assembled, and has metal gaskets, sealing rings, bosses and the like, so that the installation is more complicated, and the joint needs to be periodically maintained and maintained, which is more troublesome.
Disclosure of Invention
The invention aims to provide a sealing structure of a carbon dioxide refrigerant loop pipeline joint, which aims to solve the problem of pipeline sealing of a carbon dioxide refrigerant.
In order to achieve the purpose, the method is realized by the following technical scheme:
a sealing structure of a carbon dioxide refrigerant loop pipeline joint comprises a male flange, a female flange and a waveform metal gasket;
the male flange comprises a male flange body, a sealing boss is arranged on the male flange body, and a positioning hole and a first bolt fixing hole are formed in the male flange;
the female flange comprises a female flange body, a sealing groove is formed in the female flange body, and a positioning boss and a second bolt fixing hole are formed in the female flange;
the sealing boss is inserted into the sealing groove, the positioning boss is inserted into the positioning hole, and the first bolt fixing hole is matched with the second bolt fixing hole;
the corrugated metal gasket is arranged at the end part of the sealing boss in the sealing groove;
the axial center line of the sealing boss is not coincident with the axial center line of the male flange, and the axial center line of the sealing groove is not coincident with the axial center line of the female flange.
Furthermore, the male flange body and the female flange body are identical in shape and are both 8-shaped structures, the axial center line of the sealing boss and the axial center line of the first bolt fixing hole are symmetrical with the center line of the male flange body, and the axial center line of the sealing groove and the axial center line of the second bolt fixing hole are symmetrical with the center line of the female flange.
Furthermore, a circle of concave groove is arranged at the end part of the sealing boss.
Furthermore, the corrugated metal gasket comprises a corrugated gasket body, a circle of lower extension part is arranged on the inner ring of the corrugated gasket body, and a circle of upper extension part is arranged on the outer ring of the corrugated gasket body; the upper extending portion is inserted into the concave groove, and the lower extending portion is inserted into a pipeline connected with the female flange.
Further, the height of the lower extension part is greater than that of the upper extension part.
Furthermore, at least one ring of annular groove is arranged on the side wall of the sealing boss, and an O-shaped rubber ring is arranged in the annular groove.
The beneficial effects of the invention are:
according to the invention, by designing the R744 refrigerant loop joint sealing structure, a sealing form combining axial sealing and radial sealing is adopted, the radial waveform metal gasket sealing is used for resisting high pressure and pressure release, and the axial O-shaped rubber ring sealing is used for preventing final low pressure leakage, so that the use of sealing components is effectively reduced, the assembly process is simplified, and the sealing reliability is improved.
Drawings
Fig. 1 is an exploded view of a refrigerant circuit joint sealing structure according to the present invention.
Fig. 2 is a schematic structural view of a corrugated metal gasket.
Fig. 3 is a top view of the refrigerant circuit joint sealing structure of the present invention.
Fig. 4 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 3.
Fig. 5 is an internal schematic view of a refrigerant circuit joint sealing structure of the present invention.
Fig. 6 is a schematic view illustrating the sealing principle of the sealing structure of the refrigerant circuit joint according to the present invention.
Description of reference numerals:
1, a male flange; 2-female flange; 3-wave metal gasket, 4-O type rubber ring; 5, bolt and nut; 11-sealing the boss; 12-a first bolt fixing hole, 13-a positioning hole; 14-a concave groove; 21-sealing the groove; 22-positioning a boss; 23-second bolt fixing hole; 31-corrugated gasket body; 32-an upper extension; 33-lower extension.
Detailed Description
The following embodiments are merely exemplary, which can be used to explain and illustrate the technical solutions of the present invention, and should not be interpreted as limiting the technical solutions of the present invention.
As shown in fig. 1 to 6, the present application provides a sealing structure for a carbon dioxide refrigerant loop pipeline joint, which comprises a male flange 1, a female flange 2 and a waveform metal gasket 3, wherein the male flange and the female flange are respectively connected with a pipeline.
In this application, public flange 1 includes the public flange body, is provided with sealed boss 11 on the public flange body, still is provided with locating hole 13 and first bolt fastening hole 12 on the public flange body, and the public flange body of this application is 8 fonts.
And the sealing boss of the male flange is inserted into the sealing groove of the female flange, the positioning boss is inserted into the positioning hole, the first bolt fixing hole corresponds to the second bolt fixing hole, and the male flange and the female flange are fixedly and hermetically connected after being fastened through the bolt and nut 5.
The axial central line of the sealing boss is not coincident with the axial central line of the male flange, and the axial central line of the sealing groove is not coincident with the axial central line of the female flange. The sealing boss and the sealing groove are arranged in an offset mode relative to the respective flange body, and the sealing device is fixedly connected and sealed through only one bolt and nut, so that the important difference of the sealing structure which is formed by using at least two bolt and nuts in the prior art is achieved.
And, the axial central line of the sealed boss of this application and the axial central line of first bolt fastening hole use the central line symmetry of public flange body, and the axial central line of sealed recess and the axial central line of second bolt fastening hole use the central line symmetry of female flange. The design of the structure is also a key technology for realizing the fixation by using a bolt in the application.
A circle of concave grooves 14 are arranged on the end face of the sealing boss, at least a circle of annular grooves are arranged on the side wall of the sealing boss, and O-shaped rubber rings 4 are arranged in the annular grooves.
The wave form metal gasket 3 of this application sets up the sealed boss tip in sealed recess.
The waveform metal gasket 3 comprises a corrugated gasket body 31, wherein a circle of lower extension part 33 is arranged on the inner ring of the corrugated gasket body, and a circle of upper extension part 32 is arranged on the outer ring of the corrugated gasket body; the upward extending part is inserted into the concave groove, the downward extending part is inserted into a pipeline connected with the female flange, and the height of the downward extending part is larger than that of the upward extending part.
The working principle of the invention is as follows: the wave form metal gasket imbeds in the terminal surface of public female flange, realizes compressing tightly sealed of terminal surface through the sheetmetal circular arc, simultaneously because the wave form design has certain elasticity, when internal pressure risees, pressure effect is on the metal gasket for the metal gasket produces deformation, and then increases the packing force, and the pleating plays multilayer sealed effect. Meanwhile, the corrugated metal gasket plays a certain role in pressure relief, and the axial sealing of the O-shaped ring is combined, so that the sealing of the joint is effectively realized.
As shown in fig. 6, the pressure P0 inside the pipeline to the pressure P3 on the flange surface is a decreasing process, i.e., a pressure relief process, and satisfies P0= P1+ Ps (elastic force), and so on. When P0 is increased, the waveform gasket is deformed, and Ps is synchronously increased. P3 is the strength that the rubber O-ring can withstand.
Although embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A sealing structure of a carbon dioxide refrigerant loop pipeline joint comprises a male flange, a female flange and a waveform metal gasket; it is characterized in that the preparation method is characterized in that,
the male flange comprises a male flange body, a sealing boss is arranged on the male flange body, and a positioning hole and a first bolt fixing hole are formed in the male flange;
the female flange comprises a female flange body, a sealing groove is formed in the female flange body, and a positioning boss and a second bolt fixing hole are formed in the female flange;
the sealing boss is inserted into the sealing groove, the positioning boss is inserted into the positioning hole, and the first bolt fixing hole is matched with the second bolt fixing hole;
the corrugated metal gasket is arranged at the end part of the sealing boss in the sealing groove;
the axial center line of the sealing boss is not coincident with the axial center line of the male flange, and the axial center line of the sealing groove is not coincident with the axial center line of the female flange.
2. The carbon dioxide refrigerant loop pipeline joint sealing structure as claimed in claim 1, wherein the male flange body and the female flange body have the same shape and are both 8-shaped structures, the axial center line of the sealing boss and the axial center line of the first bolt fixing hole are symmetrical with the center line of the male flange body, and the axial center line of the sealing groove and the axial center line of the second bolt fixing hole are symmetrical with the center line of the female flange.
3. The carbon dioxide refrigerant circuit pipe joint sealing structure as claimed in claim 1, wherein a circle of concave groove is provided at an end of the sealing boss.
4. The carbon dioxide refrigerant loop pipeline joint sealing structure according to claim 1, wherein the corrugated metal gasket comprises a corrugated gasket body, a circle of lower extension part is arranged on an inner ring of the corrugated gasket body, and a circle of upper extension part is arranged on an outer ring of the corrugated gasket body; the upper extending portion is inserted into the concave groove, and the lower extending portion is inserted into a pipeline connected with the female flange.
5. The carbon dioxide refrigerant circuit pipe joint seal structure according to claim 4, wherein a height of the lower extension portion is greater than a height of the upper extension portion.
6. The carbon dioxide refrigerant loop pipe joint sealing structure as claimed in claim 1, wherein at least one ring of annular groove is provided in the side wall of the sealing boss, and an O-ring rubber ring is provided in the annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211441596.XA CN115789369A (en) | 2022-11-17 | 2022-11-17 | Carbon dioxide refrigerant loop pipeline connects seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211441596.XA CN115789369A (en) | 2022-11-17 | 2022-11-17 | Carbon dioxide refrigerant loop pipeline connects seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115789369A true CN115789369A (en) | 2023-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211441596.XA Pending CN115789369A (en) | 2022-11-17 | 2022-11-17 | Carbon dioxide refrigerant loop pipeline connects seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115789369A (en) |
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2022
- 2022-11-17 CN CN202211441596.XA patent/CN115789369A/en active Pending
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