CN220522658U

CN220522658U - Stainless steel shell type exhaust manifold structure

Info

Publication number: CN220522658U
Application number: CN202322319671.1U
Authority: CN
Inventors: 郭海涛; 李伟东
Original assignee: IAT Automobile Technology Co Ltd
Current assignee: IAT Automobile Technology Co Ltd
Priority date: 2023-08-28
Filing date: 2023-08-28
Publication date: 2024-02-23
Anticipated expiration: 2033-08-28

Abstract

The utility model discloses a stainless steel shell type exhaust manifold structure, which belongs to the technical field of automobile engines and comprises a mounting flange, an upper shell, a lower shell, an exhaust connecting pipe and an air outlet flange, wherein the upper shell and the lower shell are welded together to form a manifold, the exhaust connecting pipe is fixedly connected between the mounting flange and the manifold, the air outlet flange is arranged at one end of the manifold, and a fit gap is formed between the exhaust connecting pipe and the mounting flange. The stainless steel exhaust manifold structure can enable the manifold formed by the upper shell and the lower shell to move in the fit clearance space when being deformed, so that residual stress is released and is not transmitted to the mounting flange, air leakage caused by deformation of the mounting flange is avoided, and further engine emission deterioration caused by air leakage of the exhaust manifold is avoided.

Description

Stainless steel shell type exhaust manifold structure

Technical Field

The utility model belongs to the technical field of automobile engines, and particularly relates to a stainless steel shell type exhaust manifold structure.

Background

Exhaust manifolds are important components of automobile engines, and exhaust gas discharged by the engines is collected by the exhaust manifolds and then discharged to an exhaust gas treatment system. The mounting flange of the exhaust manifold is connected with the engine cylinder cover, and the air outlet flange is communicated with the tail gas treatment system or the supercharger to the tail gas treatment system.

With the development of light weight of automobiles, the traditional cast exhaust manifold is gradually replaced by a stainless steel exhaust manifold due to the factors of heavy weight and the like. The existing stainless steel exhaust manifold consists of a mounting flange, an upper shell, a lower shell, an air outlet flange and the like, wherein the upper shell and the lower shell are welded to form a manifold channel and an exhaust channel, the manifold channel is welded with the mounting flange, and the exhaust channel is welded with the air outlet flange. When the existing stainless steel exhaust manifold is heated by high-temperature exhaust gas during the operation of an engine, the upper shell 1 and the lower shell 2 generate thermal deformation, and residual stress generated by thermal deformation, stamping and welding generates acting force to deform the mounting flange, so that the exhaust gas leaks.

Disclosure of Invention

The utility model aims to provide a stainless steel shell type exhaust manifold structure which can solve the problem of deformation and air leakage of a stainless steel exhaust manifold mounting flange.

In order to achieve the above purpose, the utility model provides a stainless steel shell type exhaust manifold structure, which comprises a mounting flange, an upper shell, a lower shell, an exhaust connecting pipe and an exhaust flange, wherein the upper shell and the lower shell are welded together to form a manifold, the exhaust connecting pipe is fixedly connected between the mounting flange and the manifold, and one end of the manifold is provided with the exhaust flange.

Further, the exhaust connection pipe is welded with the mounting flange and the manifold respectively.

Further, the manifold is in full-welded connection with the exhaust connecting pipe, a plurality of welding spots are arranged between the exhaust connecting pipe and the mounting flange, and the exhaust connecting pipe and the mounting flange keep a coaxial position through the plurality of welding spots.

Further, a fit clearance is provided between the exhaust connection pipe and the mounting flange.

Further, the fit gap comprises a first gap and a second gap, and the sizes of the first gap and the second gap are 1-3 mm.

Further, the hole depth of the mounting flange is equal to the thickness dimension of the exhaust connecting pipe.

Further, the thickness d of the exhaust connection pipe is smaller than the hole depth c of the mounting flange.

Further, an exhaust manifold gasket is provided on one side surface of the exhaust connection pipe.

Further, a size of a lap joint portion of the exhaust connection pipe and the mounting flange is set to be e, and a width of the size e is larger than a width of the exhaust manifold gasket.

Compared with the prior art, according to the stainless steel shell type exhaust manifold structure, the upper shell and the lower shell are welded together to form the manifold, the exhaust connecting pipe is fixedly connected between the mounting flange and the manifold, and a fit clearance is formed between the exhaust connecting pipe and the mounting flange. The stainless steel exhaust manifold structure can enable the manifold formed by the upper shell and the lower shell to move in the fit clearance space when being deformed, so that residual stress is released and is not transmitted to the mounting flange, air leakage caused by deformation of the mounting flange is avoided, and further engine emission deterioration caused by air leakage of the exhaust manifold is avoided.

Drawings

FIG. 1 is a schematic diagram of an exhaust manifold of the prior art;

FIG. 2 is an isometric view of a stainless steel shell exhaust manifold structure assembly of the present utility model;

FIG. 3 is an exploded view of the stainless steel shell exhaust manifold structural assembly of the present utility model;

FIG. 4 is an elevation view of a stainless steel shell type exhaust manifold structure assembly of the present utility model;

FIG. 5 is a cut-away view of a front view of the stainless steel shell exhaust manifold structural assembly of the present utility model;

FIG. 6 is an enlarged view of part B of FIG. 5;

fig. 7 is a partial enlarged view B of fig. 5.

The main reference numerals illustrate:

1-upper shell, 2-air outlet flange, 3-lower shell, 4-mounting flange, 5-exhaust connecting pipe,

a-first gap, b-second gap, c-mounting flange hole depth, d-exhaust connection pipe thickness, e-exhaust connection pipe and mounting flange overlap portion size, f-exhaust manifold gasket width.

Detailed Description

The following detailed description of specific embodiments of the utility model is, but it should be understood that the utility model is not limited to specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.

As shown in fig. 2 to 5, a stainless steel shell type exhaust manifold structure according to a preferred embodiment of the present utility model includes a mounting flange 4, an upper shell 1, a lower shell 3, an exhaust connection pipe 5, and an exhaust flange 2, the upper shell 1 and the lower shell 3 are welded together to form a manifold, the exhaust connection pipe 5 is fixedly connected between the mounting flange 4 and the manifold, and one end of the manifold is provided with the exhaust flange. The stainless steel shell type exhaust manifold structure of the utility model welds the upper shell 1 and the lower shell 3 together to form a manifold, the exhaust connecting pipe 5 is fixedly connected between the mounting flange 4 and the manifold, and a fit clearance is formed between the exhaust connecting pipe 5 and the mounting flange 4. The stainless steel exhaust manifold structure of the utility model enables the manifold formed by the upper shell 1 and the lower shell 3 to move in the fit clearance space when deformed, so that residual stress is released and is not transmitted to the mounting flange 4, thereby avoiding air leakage caused by deformation of the mounting flange 4 and further avoiding the deterioration of engine emission caused by air leakage of the exhaust manifold.

In an embodiment of the utility model, the manifold and the exhaust connecting pipe are in full-welded connection, so that the tightness of the stainless steel shell type exhaust manifold is ensured. And a plurality of welding spots are arranged between the exhaust connecting pipe and the mounting flange, so that the exhaust connecting pipe and the mounting flange keep coaxial positions through the plurality of welding spots, and the accuracy of the stainless steel shell type exhaust manifold structure during mounting is further improved.

In an embodiment of the present utility model, there is a fit gap between the exhaust connection pipe 5 and the mounting flange 4, the fit gap includes a first gap a and a second gap b, the dimensions of the first gap a and the second gap b are 1-3 mm, the first gap a and the second gap b provide a bidirectional margin for deformation of the manifold, and further extension deterioration due to the influence of deformation is avoided.

In an embodiment of the utility model, the hole depth c of the mounting flange 4 and the thickness d of the exhaust connection pipe 5 are equal in size.

In one embodiment of the utility model, the exhaust connection 5 tube thickness d is less than the mounting flange 4 hole depth c.

Fig. 6 and 7 are enlarged partial views of B in fig. 5, in which an exhaust manifold gasket is provided on one side surface of the exhaust connection pipe 5, and a lap portion of the exhaust connection pipe 5 and the mounting flange 4 is sized to e, and a width of the size e is larger than a width f of the exhaust manifold gasket, so that the mounting flange 4 and the exhaust connection pipe 5 are prevented from simultaneously pressing the exhaust manifold gasket.

According to the stainless steel shell type exhaust manifold structure, the upper shell 1 and the lower shell 3 are welded together to form the manifold, the exhaust connecting pipe 5 is fixedly connected between the mounting flange 4 and the manifold, a fit gap is formed between the exhaust connecting pipe 5 and the mounting flange 4, so that residual stress is released and is not transmitted to the mounting flange 4 when the manifold formed by the upper shell 1 and the lower shell 3 is deformed, air leakage caused by deformation of the mounting flange 4 is avoided, and further engine emission deterioration caused by air leakage of the exhaust manifold is avoided.

The stainless steel shell type exhaust manifold structure can be used for any engine stainless steel exhaust manifold.

The foregoing descriptions of specific exemplary embodiments of the present utility model are presented for purposes of illustration and description. It is not intended to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the utility model and its practical application to thereby enable one skilled in the art to make and utilize the utility model in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the utility model be defined by the claims and their equivalents.

Claims

1. The utility model provides a stainless steel shell type exhaust manifold structure, its characterized in that includes mounting flange, epitheca, inferior valve, exhaust connecting pipe and flange of giving vent to anger, the epitheca with the inferior valve welds the manifold that constitutes together, the exhaust connecting pipe is connected and is fixed mounting flange with between the manifold, the one end of manifold is provided with the flange of giving vent to anger, the exhaust connecting pipe with have the fit clearance between the mounting flange.

2. The stainless steel shell type exhaust manifold structure according to claim 1, wherein the exhaust connection pipe is welded to the mounting flange and the manifold, respectively.

3. The stainless steel shell type exhaust manifold structure according to claim 2, wherein the manifold is in full-welded connection with the exhaust connecting pipe, a plurality of welding spots are arranged between the exhaust connecting pipe and the mounting flange, and the exhaust connecting pipe and the mounting flange are kept in a coaxial position through the plurality of welding spots.

4. The stainless steel shell exhaust manifold structure according to claim 1, wherein the mating gap comprises a first gap and a second gap, the first gap and the second gap each having a size of 1-3 mm.

5. The stainless steel shell type exhaust manifold structure according to claim 1, wherein the hole depth of the mounting flange and the thickness dimension of the exhaust connection pipe are equal.

6. The stainless steel shell type exhaust manifold structure according to claim 1, wherein the exhaust connection pipe thickness d is smaller than the mounting flange hole depth c.

7. The stainless steel shell type exhaust manifold structure according to claim 1, wherein one side surface of the exhaust connection pipe is provided with an exhaust manifold gasket.

8. The stainless steel shell exhaust manifold structure according to claim 7, wherein a dimension of a lap joint portion of the exhaust connection pipe and the mounting flange is set to e, and a width of the dimension e is larger than a width of the exhaust manifold gasket.