CN211314400U - Sealing structure between exhaust pipe and cylinder cover and engine - Google Patents
Sealing structure between exhaust pipe and cylinder cover and engine Download PDFInfo
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- CN211314400U CN211314400U CN201922492040.3U CN201922492040U CN211314400U CN 211314400 U CN211314400 U CN 211314400U CN 201922492040 U CN201922492040 U CN 201922492040U CN 211314400 U CN211314400 U CN 211314400U
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- exhaust pipe
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- cylinder cover
- sealing joint
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Abstract
The utility model discloses a seal structure and engine between blast pipe and cylinder cap for the junction of sealed blast pipe and cylinder cap, it includes: the exhaust pipe is connected with the cylinder cover through the spherical sealing joint, the spherical sealing joint is sleeved outside the end part of the exhaust pipe in a sealing manner, and the spherical sealing joint is rotatably arranged in a cylinder cover ball cavity of the cylinder cover; and the sealing ring is positioned between the spherical sealing joint and the cylinder cover ball hole. The exhaust pipe is in sealing connection with the spherical sealing joint, and the spherical sealing joint can rotate in the cylinder cover ball cavity, namely spherical connection is realized, so that when the exhaust temperature changes, the exhaust pipe deforms, the exhaust pipe rotates in the cylinder cover ball cavity, deformation compensation is realized, and the exhaust pipe is prevented from being damaged due to the constraint of deformation; the sealing ring that sets up is located between spherical sealing joint and the cylinder cap, and spherical sealing joint can not damage, consequently, has guaranteed the reliability of sealed effect.
Description
Technical Field
The utility model belongs to the technical field of power device's technique and specifically relates to a seal structure and engine between blast pipe and cylinder cap.
Background
At present, a sealing gasket is arranged between an exhaust pipe and a cylinder cover in order to ensure the sealing performance of connection, but the exhaust pipe is subjected to cold and hot deformation in the cold and hot circulation process of the existing connecting and sealing part, so that the thermal strain and the thermal deformation of the structure are serious, and the sealing failure of the exhaust pipe is further caused; in addition, the flange constraint between the exhaust manifold flange and the cylinder head is too strong, so that the thermal deformation of the exhaust pipe is restrained and damaged.
Therefore, how to provide a sealing structure between an exhaust pipe and a cylinder cover to ensure the reliability of sealing is an urgent technical problem to be solved in the field.
SUMMERY OF THE UTILITY MODEL
In view of this, an object of the present invention is to provide a sealing structure between an exhaust pipe and a cylinder head, so as to ensure the reliability of sealing. In addition, another object of the present invention is to provide an engine having the above-mentioned sealing structure between the exhaust pipe and the cylinder head.
In order to achieve the above object, the utility model provides a following technical scheme:
a sealing structure between an exhaust pipe and a cylinder cover is used for sealing the joint of the exhaust pipe and the cylinder cover and comprises:
the exhaust pipe is connected with the cylinder cover through the spherical sealing joint, the spherical sealing joint is hermetically sleeved on the outer side of the end part of the exhaust pipe, and the spherical sealing joint is rotatably arranged in a cylinder cover ball hole of the cylinder cover;
and the sealing ring is positioned between the spherical sealing joint and the cylinder cover ball hole.
Preferably, in the above sealing structure, the sealing structure further includes an exhaust pipe pressing block, the exhaust pipe pressing block is detachably connected to the cylinder cover, and the exhaust pipe pressing block has an exhaust pipe ball hole for rotatably mounting the spherical sealing joint.
Preferably, in the sealing structure, a sum of heights of the exhaust pipe ball pocket and the cylinder head ball pocket is smaller than a height of the spherical sealing joint.
Preferably, in the sealing structure, the exhaust pipe pressing block is detachably connected with the cylinder cover through a fastening bolt, a pressing spring is sleeved outside the fastening bolt, one end of the pressing spring abuts against the exhaust pipe pressing block, and the other end of the pressing spring abuts against the end of the fastening bolt.
Preferably, in the above sealing structure, the cylinder head ball pocket has a receiving groove for receiving the sealing ring.
Preferably, in the above sealing structure, the seal ring is an alloy C-type seal ring.
An engine comprises a sealing structure between an exhaust pipe and a cylinder cover, wherein the sealing structure between the exhaust pipe and the cylinder cover is any one of the sealing structures between the exhaust pipe and the cylinder cover.
According to the technical scheme, the exhaust pipe is connected with the spherical sealing joint in a sealing manner, and the spherical sealing joint can rotate in the ball cavity of the cylinder cover, namely, the spherical connection is realized, so that when the exhaust temperature changes, the exhaust pipe deforms, the exhaust pipe rotates in the ball cavity of the cylinder cover, the deformation compensation is realized, and the exhaust pipe is prevented from being damaged due to the constraint of deformation; the sealing ring that sets up is located between spherical sealing joint and the cylinder cap, and spherical sealing joint can not damage, consequently, has guaranteed the reliability of sealed effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is an exploded view of a seal structure between an exhaust pipe and a cylinder head disclosed in an embodiment of the present invention;
fig. 2 is a schematic structural view of a sealing structure between an exhaust pipe and a cylinder head disclosed in the embodiment of the present invention;
fig. 3 is a structural schematic diagram of stress when the exhaust pipe disclosed in the embodiment of the present invention is deformed by heat;
fig. 4 is a schematic structural view of the exhaust pipe disclosed in the embodiment of the present invention when the exhaust pipe is deformed by cooling.
Detailed Description
In view of this, the core of the present invention is to disclose a sealing structure between an exhaust pipe and a cylinder cover to ensure the reliability of sealing. Furthermore, another core of the present invention is to disclose an engine having a sealing structure between the above exhaust pipe and the cylinder head.
In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description.
As shown in fig. 1-4, the utility model discloses a seal structure between blast pipe and cylinder cap, include: a ball seal joint 5 and a sealing ring 6. The spherical sealing joint 5 is sleeved on the outer side of the end part of the exhaust pipe 3, specifically, the spherical sealing joint 5 is rotatably installed in a cylinder cover ball hole of a cylinder cover 7, namely, the exhaust pipe 3 is connected with the cylinder cover 7 through the spherical sealing joint 5. And the sealing ring 6 is positioned between the spherical sealing joint 5 and the cylinder cover ball cavity. Because the exhaust pipe 3 is connected with the spherical sealing joint 5 in a sealing way, and the spherical sealing joint 5 can rotate in the cylinder cover ball cavity, namely, the spherical connection is realized, when the exhaust temperature changes, the exhaust pipe 3 deforms, so that the exhaust pipe 3 rotates in the cylinder cover ball cavity, the deformation compensation is realized, and the exhaust pipe 3 is prevented from being damaged due to the constraint of deformation; the sealing ring 6 is arranged between the spherical sealing joint 5 and the cylinder cover 7, and the spherical sealing joint 5 cannot be damaged, so that the reliability of the sealing effect is ensured.
In a further embodiment, the sealing structure further includes an exhaust pipe pressing block 4, specifically, the exhaust pipe pressing block 4 is detachably connected to the cylinder head 7, and the exhaust pipe pressing block 4 has an exhaust pipe ball socket for rotatably mounting the spherical sealing joint 5. Set up detachable blast pipe compact heap 4, conveniently install ball sealing joint 5 in the ball cave or take out from the ball cave, in addition, this blast pipe compact heap 4 can also prevent ball sealing joint 5 and cylinder cap ball cave separation, has guaranteed the stability of connecting.
In a specific embodiment, the sum of the heights of the exhaust pipe ball cavity and the cylinder head ball cavity is smaller than the height of the spherical sealing joint 5, so that a rotating space is provided for the deformation of the exhaust pipe 3 to drive the spherical sealing joint 5 to rotate in the ball cavity, and the end part of the ball cavity is prevented from blocking the rotation of the spherical sealing joint 5. The specific sizes of the exhaust pipe ball hole and the cylinder cover ball hole can be set according to different requirements and are all within a protection range.
Blast pipe compact heap 4 in this application passes through fastening bolt 1 with cylinder cap 7 and can dismantle the connection to fastening bolt 1's outside cover is equipped with pressure spring 2, and 2 one end of pressure spring offsets with blast pipe compact heap 4, and the other end offsets with fastening bolt 1's tip. The compression spring 2 with large rigidity can provide enough compression force, and provides elastic variable pressure while ensuring fastening, so that the fit between the spherical sealing joint 5 and the sealing ring 6 and the spherical sealing joint 5 are positioned in an orientable ball hole, and the structure is reliable.
In a preferred embodiment, the cylinder head ball socket has a receiving groove for receiving the sealing ring 6, and the receiving groove is configured to limit the position of the sealing ring 6, so as to prevent the sealing ring 6 from changing its position in the rotation process of the spherical sealing joint 5 or separating from the cylinder head ball socket to affect the sealing effect.
The sealing ring 6 disclosed in the application is an alloy C-shaped sealing ring, and the sealing ring 6 made of different materials or types can be selected according to different requirements in practice and is in a protection range.
Realize cold and hot deformation homoenergetic in this application and guarantee seal structure of sealed effect has utilized spherical seal to make the unrestrained characteristics of the rotational degree of freedom of 3 directions, and release blast pipe 3 because the tensile compression stress that the restraint of cold and hot alternate in-process brought, stress reduction then means the corresponding improvement in cold and hot impact life-span of blast pipe 3.
Because the spherical structure has no directivity in a certain range, when the spherical structure is matched with the sealing ring 6, the problem of sealing failure caused by direction change, structure warping or deformation and the like can be well solved.
When the sealing structure is used for working:
when the engine works normally, the exhaust temperature is high, the exhaust pipe 3 is deformed by heat, the length is lengthened, but due to the constraint of the cylinder cover 7, the internal stress F of the whole exhaust pipe 3 is mutual extrusion, the stress between two adjacent exhaust manifolds is as shown in figure 3, the exhaust manifolds deform, so that the spherical sealing joint 5 can reduce 3 rotational degrees of freedom between the exhaust pipe 3 and the cylinder cover 7, and deformation compensation is realized.
As shown in fig. 4, during the low load or 0 load sliding process of the vehicle, when the vehicle is in the energy saving mode, the engine stops injecting oil, the external low temperature air rapidly enters the exhaust system, the exhaust pipe 3 is rapidly cooled, the length of the exhaust pipe 3 is reduced in the process, the internal stress is pressure, the stress condition is opposite to the above condition, and the sealing structure has no directionality because of the spherical sealing, and the sealing effect is not changed.
In addition, the present application further discloses an engine, including a sealing structure between the exhaust pipe and the cylinder head, and the sealing structure between the exhaust pipe and the cylinder head is the sealing structure between the exhaust pipe and the cylinder head disclosed in the above embodiments, so that the engine having the sealing structure between the exhaust pipe and the cylinder head also has all the above technical effects, which is not described herein again.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A sealing structure between an exhaust pipe and a cylinder head, which is used for sealing the joint of the exhaust pipe (3) and the cylinder head (7), and is characterized by comprising:
the exhaust pipe (3) is connected with the cylinder cover (7) through the spherical sealing joint (5), the spherical sealing joint (5) is sleeved outside the end part of the exhaust pipe (3) in a sealing manner, and the spherical sealing joint (5) is rotatably installed in a cylinder cover ball hole of the cylinder cover (7);
and the sealing ring (6) is positioned between the spherical sealing joint (5) and the cylinder cover ball hole.
2. The seal structure of claim 1, further comprising an exhaust pipe hold-down block (4), wherein the exhaust pipe hold-down block (4) is detachably connected to the cylinder head (7), and the exhaust pipe hold-down block (4) has an exhaust pipe ball socket for rotatably mounting the spherical seal joint (5).
3. The sealing structure according to claim 2, characterized in that the sum of the heights of the exhaust pipe ball pocket and the cylinder head ball pocket is smaller than the height of the spherical sealing joint (5).
4. The sealing structure according to claim 2, characterized in that the exhaust pipe pressing block (4) is detachably connected with the cylinder cover (7) through a fastening bolt (1), a pressing spring (2) is sleeved outside the fastening bolt (1), one end of the pressing spring (2) abuts against the exhaust pipe pressing block (4), and the other end of the pressing spring abuts against the end of the fastening bolt (1).
5. The sealing structure according to claim 1, characterized in that the cylinder head ball socket has a receiving groove for receiving the sealing ring (6).
6. A sealing arrangement according to any of claims 1-5, characterised in that the sealing ring (6) is an alloy C-shaped sealing ring.
7. An engine comprising a seal structure between an exhaust pipe and a cylinder head, characterized in that the seal structure between the exhaust pipe and the cylinder head is a seal structure between an exhaust pipe and a cylinder head according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922492040.3U CN211314400U (en) | 2019-12-31 | 2019-12-31 | Sealing structure between exhaust pipe and cylinder cover and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922492040.3U CN211314400U (en) | 2019-12-31 | 2019-12-31 | Sealing structure between exhaust pipe and cylinder cover and engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211314400U true CN211314400U (en) | 2020-08-21 |
Family
ID=72064344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922492040.3U Active CN211314400U (en) | 2019-12-31 | 2019-12-31 | Sealing structure between exhaust pipe and cylinder cover and engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211314400U (en) |
-
2019
- 2019-12-31 CN CN201922492040.3U patent/CN211314400U/en active Active
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