KR20150003261U - Exhaust manifold assembly - Google Patents

Abstract

The exhaust manifold assembly includes a first exhaust manifold, a second exhaust manifold, a first sealing member, and a second sealing member. A second exhaust manifold is slidably connected to the first exhaust manifold. The first sealing member seals an axial gap between the first exhaust manifold and the second exhaust manifold. A second sealing member seals a radial gap between the first exhaust manifold and the second exhaust manifold. Therefore, the outflow of the exhaust gas through the clearance can be suppressed.

Description

Exhaust manifold assembly {EXHAUST MANIFOLD ASSEMBLY}

The present invention relates to an exhaust manifold assembly, and more particularly to an exhaust manifold assembly for exhausting exhaust gas from an engine.

Generally, the exhaust gas generated in the engine is exhausted through the exhaust manifold assembly. Since the exhaust gas has a high temperature, the exhaust manifold is partially expanded by the temperature of the exhaust gas. Particularly, in the case of a large engine, the expansion / contraction amount of the exhaust manifold is considerable.

If the expansion and contraction of the exhaust manifold in accordance with the temperature of the exhaust gas is not corrected, the exhaust manifold may be damaged. To this end, the exhaust manifold is divided into two sliding manifolds. A gap is naturally formed between the two sliding-coupled exhaust manifolds. Since the exhaust gas flows out through the gap, the O-ring is disposed in the gap. However, there is a limitation in suppressing the outflow of the exhaust gas through the gap with the O-ring alone.

The present invention provides an exhaust manifold assembly with improved sealing performance.

According to an aspect of the present invention, an exhaust manifold assembly includes a first exhaust manifold, a second exhaust manifold, a first sealing member, and a second sealing member. A second exhaust manifold is slidably connected to the first exhaust manifold. The first sealing member seals an axial gap between the first exhaust manifold and the second exhaust manifold. A second sealing member seals a radial gap between the first exhaust manifold and the second exhaust manifold.

In exemplary embodiments, the second sealing member may include a sleeve closely attached to the inner circumferential surfaces of the first exhaust manifold and the second exhaust manifold.

In exemplary embodiments, the inner circumferential surfaces of the first exhaust manifold and the second exhaust manifold may be formed with receiving grooves for receiving the sleeves.

In exemplary embodiments, the axial length of the sleeve may be less than the axial length of the receiving groove.

In exemplary embodiments, the sleeve may have the same thickness as the depth of the receiving groove.

In exemplary embodiments, the sleeve may have a seal inserted in the radial clearance.

In exemplary embodiments, the seal may have a narrower width than the radial clearance.

In exemplary embodiments, the first sealing member may include an o-ring.

In the exemplary embodiments, the O-rings may be in pairs.

According to the present invention described above, since the first sealing member seals the axial clearance between the first and second exhaust manifolds and the second sealing member seals the radial clearance, the first and second exhaust manifolds Thereby sealing the gap between them. Therefore, the outflow of the exhaust gas through the clearance can be suppressed.

1 is an exploded perspective view showing an exhaust manifold assembly according to an embodiment of the present invention.
2 is a cross-sectional view of the exhaust manifold assembly of FIG.
3 is a cross-sectional view illustrating an exhaust manifold assembly according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the appended claims are not intended to limit the invention to the particular forms disclosed, but to include all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

FIG. 1 is an exploded perspective view showing an exhaust manifold assembly according to one embodiment of the present invention, and FIG. 2 is a sectional view showing an exhaust manifold assembly of FIG.

1 and 2, an exhaust manifold assembly 100 according to the present embodiment includes a first exhaust manifold 110, a second exhaust manifold 120, a first sealing member 130, And a sealing member 140.

The first exhaust manifold 110 and the second exhaust manifold 120 are passages through which the exhaust gas is discharged. Accordingly, during the operation of the engine, the first exhaust manifold 110 and the second exhaust manifold 120 are inflated by the high-temperature exhaust gas, and during the engine stop, the first exhaust manifold 110 and the second exhaust manifold 120, (120) is contracted.

The first exhaust manifold 110 and the second exhaust manifold 120 are slidably coupled to absorb the stretching portions of the first exhaust manifold 110 and the second exhaust manifold 120 . In this embodiment, the outer circumferential surface of the first exhaust manifold 110 and the inner circumferential surface of the second exhaust manifold 120 are coupled to each other. Therefore, a gap is formed between the first exhaust manifold 110 and the second exhaust manifold 120. The clearance includes a gap G1 along the axial direction of the first and second exhaust manifolds 110 and 120 and a gap G2 along the radial direction of the first and second exhaust manifolds 110 and 120 do. The axial clearance G1 corresponds to the space between the outer circumferential surface of the first exhaust manifold 110 and the inner circumferential surface of the second exhaust manifold 120. [ The radial clearance G2 corresponds to the space between the opposed sides of the first and second exhaust manifolds 110, 120.

The first sealing member 130 seals the axial clearance G1 of the first and second exhaust manifolds 110 and 120. In this embodiment, the first sealing member 130 includes an O-ring. The O-ring 130 is disposed between the outer circumferential surface of the first exhaust manifold 110 and the inner circumferential surface of the second exhaust manifold 120 to seal the axial gap G1. The O-rings 130 may be a pair. Also, the pair of O-rings 130 may be plural.

The second sealing member 140 seals the radial clearance G2 of the first and second exhaust manifolds 110 and 120. [ In this embodiment, the second sealing member 140 includes a sleeve. The sleeve 140 has a cylindrical shape whose both sides are opened along the axial direction. Thus, the sleeve 140 has an outer surface facing the inner surfaces of the first and second exhaust manifolds 110, 120.

Additionally, the first and second exhaust manifolds 110 and 120 have receiving grooves 112 for receiving the second sealing member 140. The receiving groove 112 has a ring shape formed on the inner surfaces of the first and second exhaust manifolds 110 and 120.

In this embodiment, the second sealing member 140 has such a thickness as not to protrude from the inner surfaces of the first and second exhaust manifolds 110 and 120. That is, the second sealing member 140 has a thickness substantially equal to or slightly thinner than the depth of the receiving groove 112. If the second sealing member 140 protrudes from the inner surfaces of the first and second exhaust manifolds 110 and 120 so that the protruding portion of the second sealing member 140 protrudes from the first and second exhaust manifolds 110 and 120, , 120) of the exhaust gas. Therefore, it is preferable that the second sealing member 140 has a thickness that is substantially equal to or slightly thinner than the depth of the receiving groove 112.

Further, in this embodiment, the axial length of the second sealing member 140 is shorter than the axial length of the receiving groove 112. If the axial length of the second sealing member 140 is substantially the same as the axial length of the receiving groove 112, both side surfaces of the second sealing member 140 are brought into contact with both sides of the receiving groove 112. In this case, the expansion and contraction operations of the first and second exhaust manifolds 110 and 120 can be disturbed by the second sealing member 140. [ Therefore, it is preferable that the axial length of the second sealing member 140 is shorter than the axial length of the receiving groove 112.

Additionally, accommodating the second sealing member 140 in the receiving groove 112 facilitates axial alignment of the first and second exhaust manifolds 110, 120. Therefore, the assembly operation of the first and second exhaust manifolds 110 and 120 can be facilitated.

According to this embodiment, since the first sealing member seals the axial gap between the first and second exhaust manifolds and the second sealing member seals the radial clearance, the gap between the first and second exhaust manifolds Thereby sealing the gap between the two. Therefore, the outflow of the exhaust gas through the clearance can be suppressed.

3 is a cross-sectional view illustrating an exhaust manifold assembly according to another embodiment of the present invention.

The exhaust manifold assembly 100a according to the present embodiment includes substantially the same components as those of the exhaust manifold assembly 100 of FIG. 2 except for the second sealing member. Accordingly, the same components are denoted by the same reference numerals, and repetitive descriptions of the same components are omitted.

Referring to Fig. 3, the second sealing member 140a according to the present embodiment further has a sealing portion 142. Fig. The sealing portion 142 is formed along the radial direction on the outer surface of the second sealing member 140a. The sealing portion 142 is inserted into the radial clearance G2. Thus, the radial clearance G2 is primarily sealed by the sealing member 140 and secondarily sealed by the sealing portion 142. [ Therefore, the outflow of exhaust gas through the radial clearance G2 can be further suppressed.

In the present embodiment, the sealing portion 142 has a narrower width than the radial clearance G2. If the width of the sealing portion 142 is substantially equal to the width of the radial clearance G2, both sides of the sealing portion 142 are brought into contact with both sides of the radial clearance G2. In this case, the expansion and contraction operations of the first and second exhaust manifolds 110 and 120 can be disturbed by the sealing portion 142. Therefore, it is preferable that the width of the sealing portion 142 is shorter than the width of the radial clearance G2.

In addition, by inserting the sealing portion 142 in the radial clearance G2, the assembling position of the first exhaust manifold 110 and the second exhaust manifold 120 can be accurately set. Therefore, the assembly operation of the first and second exhaust manifolds 110 and 120 can be facilitated.

According to this embodiment, since the first sealing member seals the axial gap between the first and second exhaust manifolds and the second sealing member and the sealing portion double seal the radial clearance, the first and second exhaust manifolds The gap between the manifolds is sealed in triplicate. Therefore, the outflow of the exhaust gas through the clearance can be further suppressed.

As described above, according to the embodiments, since the first sealing member seals the axial clearance between the first and second exhaust manifolds and the second sealing member seals the radial clearance, the first and second The gap between the exhaust manifolds is doubly sealed. Therefore, the outflow of the exhaust gas through the clearance can be suppressed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the appended claims. It will be understood that the invention may be modified and varied without departing from the scope of the invention.

110; A first exhaust manifold 112; Housing
120; A second exhaust manifold 130; The first sealing member
140; A second sealing member 142; The sealing portion

Claims (9)

A first exhaust manifold;
A second exhaust manifold slidably connected to the first exhaust manifold;
A first sealing member sealing an axial gap between the first exhaust manifold and the second exhaust manifold; And
And a second sealing member sealing a radial gap between the first exhaust manifold and the second exhaust manifold. 2. The exhaust manifold assembly of claim 1, wherein the second sealing member comprises a sleeve closely attached to the inner circumferential surfaces of the first exhaust manifold and the second exhaust manifold. 3. The exhaust manifold assembly according to claim 2, wherein the inner circumferential surfaces of the first exhaust manifold and the second exhaust manifold have receiving grooves for receiving the sleeves. 4. The exhaust manifold assembly according to claim 3, wherein the axial length of the sleeve is shorter than the axial length of the receiving recess. 4. The exhaust manifold assembly of claim 3, wherein the sleeve has a thickness equal to the depth of the receiving groove. 3. The exhaust manifold assembly of claim 2, wherein the sleeve has a seal inserted in the radial gap. 7. The exhaust manifold assembly of claim 6, wherein the seal has a narrower width than the radial clearance. The exhaust manifold assembly of claim 1, wherein the first sealing member comprises an o-ring. The exhaust manifold assembly of claim 8, wherein the o-rings are a pair.

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