CN214404666U

CN214404666U - EGR sealing ring with high reliability

Info

Publication number: CN214404666U
Application number: CN202120357185.7U
Authority: CN
Inventors: 姚宗昌
Original assignee: Zhejiang Yutai Seiko Co ltd
Current assignee: Zhejiang Yutai Seiko Co ltd
Priority date: 2021-02-07
Filing date: 2021-02-07
Publication date: 2021-10-15
Anticipated expiration: 2031-02-07

Abstract

The utility model provides a EGR sealing ring of high reliability belongs to engine exhaust emission technical field. It has solved the current not good problem of sealing ring work leakproofness under high temperature environment. This sealing ring is including being annular body, and the diameter of body increases from left to right gradually, and the left side of body is equipped with incurve arc portion one, and the right side of body is equipped with incurve arc portion two. This sealing ring can take place the inflation after being heated, the inflation will be filled up the clearance that forms between the less position of sealing ring left side diameter and the medial surface of exhaust emission end, increase sealed area of contact, thereby realize making and keep better leakproofness between exhaust emission end and the blast pipe under the high-temperature and high-pressure environment, surround between this sealing ring and the blast pipe and form an inner chamber, the gas of inner chamber can receive the thermal expansion to open and give the very powerful radial holding power of sealing ring, the leakproofness of this sealing ring under the high-temperature and high-pressure environment of further increase.

Description

EGR sealing ring with high reliability

Technical Field

The utility model belongs to the technical field of engine exhaust emission, a sealing ring is related to, especially, relate to a EGR sealing ring of high reliability.

Background

With the upgrade of national emission and the continuous improvement of reliability, the six-emission standard of the engine is implemented, and the engine is pushed to the seven-emission standard at present. The EGR sealing system has a direct influence on the emissions, and is a connecting sealing structure between the exhaust gas discharge end of the engine and the exhaust pipe. The existing connection structure usually adopts the method of sleeving a sealing ring on the exhaust pipe and then inserting the whole exhaust pipe bearing into the exhaust gas discharge end for connection and sealing. Traditional sealing ring is mostly the rectangle structure, has the clearance of closing a mouthful, appears a small amount of gas leakage easily, especially after the sealing ring elasticity decay. The sealing ring has the following main working conditions: 1. the working temperature is about 760 ℃, 2, the sealing ring keeps larger elasticity, 3, bears certain gas pressure, about 450KPa, 4, and vibrates with the engine at high frequency.

Under the conditions, the common sealing ring with the rectangular radial section is particularly easy to elastically attenuate to cause side leakage after being installed, so that the sealing property between the exhaust gas discharge end and the exhaust pipe is reduced, and the exhaust gas which is strictly required by the exhaust gas discharge in our country and does not reach the catalytic standard can not be discharged even if the exhaust gas leaks. Therefore, the problem of solving the above existing problem is that the matters to be handled are not buffered at present.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a EGR sealing ring of high reliability. The sealing ring solves the technical problem that the existing sealing ring is poor in working sealing performance in a high-temperature environment.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a high reliability's EGR sealing ring, is including being annular body, its characterized in that, the diameter of body from left to right increases gradually, and the left side of body is equipped with incurve arc portion one, the right side of body is equipped with incurve arc portion two.

The diameter of this sealing ring increases gradually from left to right, sets up like this and makes its surface be the slope setting, and the high outer peripheral face in the low right side in a left side makes to install on the blast pipe, then can present the great one side of right diameter when inserting the blast pipe in the engine exhaust emission end and lean on to form sealedly on the medial surface of exhaust emission end, and the left side diameter of sealing ring less then with form the clearance between the medial surface of exhaust emission end. Because what discharge in the waste gas pipe is high temperature high pressure gas, so can take place the inflation after the sealing ring is heated when the engine work, the inflation will be filled up the clearance that forms between the less position of sealing ring left side diameter and the medial surface of waste gas emission end, increases sealed area of contact to the realization makes under the high temperature high pressure environment keep better leakproofness between waste gas emission end and the blast pipe. And under the cold machine's of engine state, the right side of this sealing ring and the medial surface of exhaust emission end are in to leaning on the encapsulated situation, and after high temperature is heated, its radial holding power that leans on exhaust emission end of the radial expansion of right-hand member of sealing ring is bigger, and the effectual sealing performance who improves this sealing ring under high pressure high temperature.

The left side and the right side of the sealing ring are respectively provided with a first arc part and a second arc part which are bent inwards, the inward bending design of the first arc part and the second arc part has the advantages of providing the whole sealing ring with better radial supporting capacity, so that the sealing ring can still keep a better trend of abutting against the inner side surface of the exhaust gas discharge end under the condition of high-temperature heating, when the sealing ring is arranged in the mounting groove of the exhaust pipe, the sealing ring is contacted with the groove bottom of the mounting groove through the first arc part and the second arc part, the design makes the first arc part, the second arc part and the bottom of the mounting groove surround to form an inner cavity, when the whole structure is heated due to the discharged high-temperature gas, the gas in the whole inner cavity can expand to give strong radial supporting force to the sealing ring, so that the sealing ring is tightly attached to the inner circumferential surface of the waste gas discharge end, and the sealing performance of the sealing ring in a high-temperature and high-pressure environment is further improved.

In the EGR sealing ring with high reliability, an inner groove is formed between the first arc-shaped part and the body.

The existence of inner groovy explains that the arc portion is very big for the degree of incurve, when installing this sealing ring in the mounting groove of blast pipe, the lateral surface of arc portion one can support with the tank bottom of mounting groove and lean on the contact, the design can be more easily with the sealing ring and form sealed inner chamber between the tank bottom of mounting groove like this, and when overall structure is heated, because the crooked degree of arc portion one is great, the gas of inner chamber is difficult to spill over outside the inner chamber, the design has increased this sealing ring seal stability under high temperature high pressure environment like this.

In the EGR seal ring with high reliability, the notch of the inner groove is in a closed-up shape.

The notch of inner groovy is the design of binding off form, and the benefit of design like this forms the inner chamber between the tank bottom of the mounting groove that can sealing ring and blast pipe more easily, and the inner groovy of binding off form explains that the incurving degree of whole arc portion one is very high moreover, and the expanded ability in body left side at arc portion one place is better when being heated, has further improved the leakproofness of this sealing ring under high temperature high pressure environment.

In the EGR seal ring with high reliability, the first arc-shaped portion and the second arc-shaped portion are integrally formed with the body.

In the EGR seal ring with high reliability, the surfaces of the body, the first arc-shaped part and the second arc-shaped part are coated with a TiALN PVD coating and an aviation nickel alloy material coating.

TiALN PVD coating and aviation nickel alloy material coating for this sealing ring better adapts to high temperature and high pressure's operational environment, and further improvement this sealing ring's sealed effect.

Compared with the prior art, the product has the advantages that:

1. the exhaust in the waste gas pipe is the high-temperature high-pressure gas, so can take place the inflation after the sealing ring is heated when the engine work, the inflation will be filled up the clearance that forms between the less position of sealing ring left side diameter and the medial surface of exhaust emission end, increases sealed area of contact to the realization makes under the high-temperature high-pressure environment keep better leakproofness between exhaust emission end and the blast pipe.

2. When the sealing ring is installed in the mounting groove of blast pipe, be the tank bottom contact through arc portion one and arc portion two and mounting groove, design like this makes arc portion one and arc portion two still surround between the mounting groove tank bottom three and form an inner chamber, when whole structure is heated because the high-temperature gas who discharges, the gas in whole inner chamber can expand and open and give the very powerful radial holding power of sealing ring and make the sealing ring tightly paste on the inner peripheral surface of exhaust emission end, further this sealing ring of increase leakproofness under the high-temperature high-pressure environment.

3. The existence of inner groovy explains that the arc portion is very big to the degree of incurve earlier on, when installing this sealing ring in the mounting groove of blast pipe, the lateral surface of arc portion one can support with the tank bottom of mounting groove and lean on the contact, design like this can be more easy and the tank bottom of mounting groove between form sealed inner chamber, the interior intracavity gas is difficult to spill over outside the inner chamber, design like this has increased this sealing ring seal stability under high temperature high pressure environment.

Drawings

FIG. 1 is a structural view of the present invention;

fig. 2 is a half sectional view of the present invention;

fig. 3 is a partial cross-sectional view at a of the present invention.

In the figure, 1, a body; 11. a first arc part; 12. a second arc part; 13. an inner groove.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1-3, the highly reliable EGR sealing ring includes a ring-shaped body 1, the diameter of the body 1 gradually increases from left to right, a first arc-shaped portion 11 bent inward is disposed on the left side of the body 1, and a second arc-shaped portion 12 bent inward is disposed on the right side of the body 1. The diameter of this sealing ring increases gradually from left to right, sets up like this and makes its surface be the slope setting, and the high outer peripheral face in the low right side in a left side makes to install on the blast pipe, then can present the great one side of right diameter when inserting the blast pipe in the engine exhaust emission end and lean on to form sealedly on the medial surface of exhaust emission end, and the left side diameter of sealing ring less then with form the clearance between the medial surface of exhaust emission end. Because what discharge in the waste gas pipe is high temperature high pressure gas, so can take place the inflation after the sealing ring is heated when the engine work, the inflation will be filled up the clearance that forms between the less position of sealing ring left side diameter and the medial surface of waste gas emission end, increases sealed area of contact to the realization makes under the high temperature high pressure environment keep better leakproofness between waste gas emission end and the blast pipe. And under the cold machine's of engine state, the right side of this sealing ring and the medial surface of exhaust emission end are in to leaning on the encapsulated situation, and after high temperature is heated, its radial holding power that leans on exhaust emission end of the radial expansion of right-hand member of sealing ring is bigger, and the effectual sealing performance who improves this sealing ring under high pressure high temperature.

The left side and the right side of the sealing ring are respectively provided with a first arc part 11 and a second arc part 12 which are bent inwards, the inward bending design of the first arc part 11 and the second arc part 12 has the advantage of providing the whole sealing ring with better radial supporting capacity, so that the sealing ring can still keep better tendency of abutting against the inner side surface of the waste gas discharge end under the condition of high-temperature heating, and when the sealing ring is arranged in the mounting groove of the exhaust pipe, the first arc part 11 and the second arc part 12 are contacted with the groove bottom of the mounting groove, the design ensures that an inner cavity is formed by surrounding the first arc part 11, the second arc part 12 and the groove bottom of the mounting groove, when the whole structure is heated due to discharged high-temperature gas, gas in the whole inner cavity can expand to provide strong radial supporting force for the sealing ring, so that the sealing ring tightly abuts against the inner peripheral surface of the waste gas discharge end, the sealing performance of the sealing ring under the high-temperature and high-pressure environment is further improved.

An inner groove 13 is formed between the first arc-shaped part 11 and the body 1, and the notch of the inner groove 13 is also in a closed-up shape. The existence of inner groovy 13 explains that the degree of arc portion 11 incurve is very big, when installing this sealing ring in the mounting groove of blast pipe, the lateral surface of arc portion 11 can support with the tank bottom of mounting groove and lean on the contact, the design can form sealed inner chamber between the tank bottom of sealing ring and mounting groove more easily like this, and when whole structure is heated, because the degree of curvature of arc portion 11 is great, the gas of inner chamber is difficult to spill over outside the inner chamber, the design has increased the sealed stability of this sealing ring under high temperature high pressure environment like this. The notch of inner groovy 13 is the design of binding off form, and the benefit of design like this forms the inner chamber between the tank bottom of the mounting groove that can the sealing ring and blast pipe more easily, and the inner groovy 13 of binding off form explains that the incurving degree of whole arc portion 11 is very high moreover, and the expanded ability in 1 left side of the body at arc portion 11 place is better when being heated, has further improved the leakproofness of this sealing ring under high temperature high pressure environment.

The first arc-shaped part 11 and the second arc-shaped part 12 are integrally formed with the body 1, and the surfaces of the body 1, the first arc-shaped part 11 and the second arc-shaped part 12 are coated with a TiALN PVD coating and an aviation nickel alloy material coating. TiALN PVD coating and aviation nickel alloy material coating for this sealing ring better adapts to high temperature and high pressure's operational environment, and further improvement this sealing ring's sealed effect.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a high reliability's EGR sealing ring, is including being annular body (1), its characterized in that, the diameter of body (1) increases gradually from left to right, and the left side of body (1) is equipped with incurved arc portion one (11), the right side of body (1) is equipped with incurved arc portion two (12).

2. A highly reliable EGR seal ring according to claim 1 characterized in that an inner groove (13) is formed between the first arc-shaped portion (11) and the body (1).

3. A highly reliable EGR seal ring according to claim 2 characterized in that the notch of the inner groove (13) is arranged in a converging manner.

4. A highly reliable EGR seal ring according to claim 3 wherein the first and second arcuate portions (11, 12) are formed integrally with the body (1).

5. A highly reliable EGR seal ring according to any of claims 1-4 characterized in that the surfaces of the body (1), the first arc portion (11) and the second arc portion (12) are coated with a TiALN PVD coating and an aerospace nickel alloy material coating.