CN107246310B

CN107246310B - Sealing device capable of preventing exhaust manifold from loosening

Info

Publication number: CN107246310B
Application number: CN201710682895.5A
Authority: CN
Inventors: 袁春志; 梁静
Original assignee: Chengdu Lingchuan Special Industry Co Ltd
Current assignee: Chengdu Lingchuan Special Industry Co Ltd
Priority date: 2017-08-11
Filing date: 2017-08-11
Publication date: 2021-01-29
Anticipated expiration: 2037-08-11
Also published as: CN107246310A

Abstract

The invention discloses a sealing device capable of preventing an exhaust manifold from loosening, which comprises an exhaust manifold gasket body, wherein a through hole and a mounting hole are formed in the exhaust manifold gasket body, the exhaust manifold gasket body comprises an upper gasket and a lower gasket, an elastic connecting part is arranged between the upper gasket and the lower gasket and is positioned at two ends of the upper gasket and the lower gasket, the upper gasket, the lower gasket and the elastic connecting part form a cavity, and a heat dissipation element is arranged in the cavity. The upper gasket and the lower gasket can be automatically adjusted under the action of the elastic connecting part and are attached to the exhaust manifold and the engine cylinder, so that the exhaust manifold gasket body is prevented from generating a large gap between the exhaust manifold gasket body and the exhaust manifold or the engine cylinder to cause sealing failure, the radiating element is favorable for radiating the exhaust manifold gasket body, and the exhaust manifold gasket body is prevented from generating thermal deformation due to overhigh temperature to further cause sealing failure.

Description

Sealing device capable of preventing exhaust manifold from loosening

Technical Field

The invention relates to the field of automobile parts, in particular to a sealing device capable of preventing an exhaust manifold from loosening.

Background

The exhaust manifold is connected to the engine block, and has a branch pipe for collecting exhaust gas from each cylinder and introducing the collected exhaust gas into an exhaust manifold. Early automobile engines had low power per unit weight, low fuel combustion efficiency, and exhausted exhaust gas temperatures of no more than 500 ℃. Along with the improvement of the efficiency of the automobile engine, the exhaust temperature is increased to 600-650 ℃. In recent years, the emission standard of automobile exhaust is continuously improved, and the application of a catalytic technology and a turbocharging technology remarkably improves the working temperature of an exhaust manifold to more than 750 ℃. As engine performance further increases, the operating temperature of the exhaust manifold also increases. Meanwhile, with the advance of engine technology, the structure of the exhaust manifold is also complicated, and the exhaust manifold material is required to have good high-temperature performance and good casting performance by working under the condition of circulating alternating temperature.

The exhaust manifold must therefore have the following characteristics: 1. good high temperature oxidation resistance: the exhaust manifold works in a high-temperature circulation alternating state for a long time, and the oxidation resistance of the material at high temperature directly influences the service life of the exhaust manifold. The common cast iron obviously cannot meet the requirements, and alloy elements are required to be added into the material to improve the high-temperature oxidation resistance of the material; 2. stable microstructure: in the range from room temperature to the working temperature, the material should have as little phase change as possible or as little phase change as possible. Because the phase change can cause volume change, internal stress or deformation is generated, and the service performance and the service life of the product are influenced. The matrix material is therefore preferably a stable ferritic or austenitic structure. The damage form of cast iron parts working under high temperature condition is mainly shown as corrosion under high temperature condition, after the oxidation of composition phases in the structure, such as graphite carbon, the volume of oxides is larger than the original volume, and the irreversible expansion of the casting is caused; 3. the thermal expansion coefficient is small: the small thermal expansion coefficient is beneficial to reducing the thermal stress and thermal deformation of the exhaust manifold, improving the service performance and prolonging the service life of the product; 4. excellent high-temperature strength: the necessary strength requirements of the product when used at high temperature must be met; 5. good process performance and low cost: there are many kinds of heat-resistant and high-temperature-resistant metal materials, but due to the complicated shape of the exhaust manifold, the material for manufacturing the exhaust manifold must have good manufacturability and the cost thereof must meet the mass production requirements of the automobile industry.

In order to ensure the good exhaust tightness of the exhaust manifold and avoid the looseness of the exhaust manifold and an engine cylinder in the use process of an engine to influence the normal introduction of exhaust, the exhaust manifold gasket is arranged between the exhaust manifold and the engine cylinder, but the traditional exhaust manifold gasket is only a thin gasket, so that the tightness of the exhaust manifold is poor when the exhaust manifold is used at a later stage, exhaust gas discharged by the cylinder is easy to leak, and the looseness of the exhaust manifold is easy to occur after the engine is used for a long time to influence the normal use of the exhaust manifold and the normal work of the engine. Meanwhile, the exhaust manifold gasket works in a high-temperature environment and is subjected to thermal stress, so that thermal deformation is easily caused, and the joint surface of the exhaust manifold gasket and the exhaust end of the exhaust manifold is uneven, so that sealing failure is caused.

Disclosure of Invention

The invention aims to solve the technical problems that an existing exhaust manifold gasket is easy to loosen in the use process of an engine and the exhaust manifold gasket is easy to deform under a high-temperature environment, so that sealing failure is caused, and provides a sealing device capable of preventing the exhaust manifold from loosening.

The invention is realized by the following technical scheme:

the sealing device capable of preventing the exhaust manifold from loosening comprises an exhaust manifold gasket body, wherein through holes and mounting holes are formed in the exhaust manifold gasket body, the exhaust manifold penetrates through the through holes, the exhaust manifold gasket body is mounted between the exhaust manifold and an engine cylinder through the mounting holes and fasteners, the number of the through holes and the mounting holes is determined according to the specific structure of the exhaust manifold, the exhaust manifold gasket body comprises an upper gasket and a lower gasket, an elastic connecting part is arranged between the upper gasket and the lower gasket, the elastic connecting part is located at two ends of the upper gasket and the lower gasket, the upper gasket, the lower gasket and the elastic connecting part form a cavity, a radiating element is arranged in the cavity, compared with the existing sheet type exhaust manifold gasket, the exhaust manifold gasket body with the cavity structure is provided with the elastic connecting parts at two ends, and when the exhaust manifold and the engine cylinder vibrate or are misplac, the upper gasket and the lower gasket can be automatically adjusted under the action of the elastic connecting part and are attached to the exhaust manifold and the engine cylinder, so that the large gap between the exhaust manifold gasket body and the exhaust manifold or the engine cylinder is avoided, and the sealing failure is avoided; the cavity structure also makes exhaust manifold liner body radiating effect itself better, and simultaneously, radiating element's effect also is favorable to the heat dissipation of exhaust manifold liner body, avoids the high temperature and leads to exhaust manifold liner body to produce the heat altered shape, and then leads to sealed inefficacy.

Furthermore, still be provided with elastic element one in the cavity, the both ends of elastic element one respectively with go up the gasket and link to each other with lower gasket, when the last gasket of exhaust manifold liner body and lower gasket received great impact force, elastic element one can play buffering and absorbing effect.

Furthermore, elastic elements II are arranged between the radiating element and the upper gasket and between the radiating element and the lower gasket, the radiating element is connected with the upper gasket and the lower gasket through the elastic elements II, and when the positions of the upper gasket and the lower gasket are automatically adjusted, the radiating element can also be automatically adjusted, so that the radiating element is prevented from being damaged, and the service life of the exhaust manifold gasket body is prolonged.

Furthermore, the elastic connecting part is made of high-temperature resistant elastic material.

Further, the heat dissipation element is a heat sink.

Further, the first elastic element is a spring.

Furthermore, the second elastic element is made of a high-temperature resistant elastic material, and the high-temperature resistant elastic material, the radiating fins and the springs are made of materials or parts which are common in the prior art.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. compared with the existing sheet type exhaust manifold gasket, the sealing device capable of preventing the exhaust manifold from loosening has the advantages that the elastic connecting parts are adopted at the two ends of the exhaust manifold gasket body of the cavity structure, so that when the exhaust manifold vibrates or is dislocated with an engine cylinder, the upper gasket and the lower gasket can be automatically adjusted under the action of the elastic connecting parts and are attached to the exhaust manifold and the engine cylinder, and the sealing failure caused by a large gap between the exhaust manifold gasket body and the exhaust manifold or the engine cylinder is avoided.

2. The sealing device can prevent the exhaust manifold from loosening, the cavity structure also enables the exhaust manifold gasket body to have a better heat dissipation effect, and meanwhile, the heat dissipation element also has the function of facilitating the heat dissipation of the exhaust manifold gasket body, so that the thermal deformation of the exhaust manifold gasket body caused by overhigh temperature is avoided, and further the sealing failure is caused.

3. According to the sealing device capable of preventing the exhaust manifold from loosening, the elastic element I is further arranged in the cavity, two ends of the elastic element I are respectively connected with the upper gasket and the lower gasket, and when the upper gasket and the lower gasket of the exhaust manifold gasket body are subjected to large impact force, the elastic element I can play a role in buffering and shock absorption, so that the service life of the exhaust manifold gasket body is prolonged.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is a top view of the present invention.

Reference numbers and corresponding part names in the drawings:

1-exhaust manifold gasket body, 2-through hole, 3-mounting hole, 4-upper gasket, 5-lower gasket, 6-elastic connecting part, 7-radiating element, 8-elastic element I and 9-elastic element II.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

Example 1

As shown in fig. 1-2, the sealing device capable of preventing the exhaust manifold from loosening according to the present invention comprises an exhaust manifold gasket body 1, the exhaust manifold gasket body 1 is provided with a through hole 2 and a mounting hole 3, the exhaust manifold passes through the through hole 2, the exhaust manifold gasket body 1 is mounted between the exhaust manifold and an engine cylinder through the mounting hole 3 and a fastening member, the number of the through hole 2 and the mounting hole 3 is determined according to the specific structure of the exhaust manifold, the exhaust manifold gasket body 1 comprises an upper gasket 4 and a lower gasket 5, an elastic connection portion 6 is provided between the upper gasket 4 and the lower gasket 5, the elastic connection portion 6 is located at two ends of the upper gasket 4 and the lower gasket 5, the upper gasket 4, the lower gasket 5 and the elastic connection portion 6 form a cavity, the elastic connection portion 6 is made of a high temperature resistant elastic material, a heat dissipation element 7 is provided in the cavity, the heat dissipation element 7 is a heat dissipation fin, because the two ends of the exhaust manifold gasket body 1 of the cavity structure adopt the elastic connecting parts 6, when the exhaust manifold and an engine cylinder vibrate or are staggered, the upper gasket 4 and the lower gasket 5 can be automatically adjusted under the action of the elastic connecting parts 6 and are attached to the exhaust manifold and the engine cylinder, and the sealing failure caused by a large gap between the exhaust manifold gasket body 1 and the exhaust manifold or the engine cylinder is avoided; the cavity structure also makes exhaust manifold liner body 1 self radiating effect better, and simultaneously, radiating element 7's effect also is favorable to exhaust manifold liner body 1's heat dissipation, avoids the high temperature and leads to exhaust manifold liner body 1 to produce the heat altered shape, and then leads to sealed inefficacy.

Example 2

The present invention is further illustrated on the basis of example 1.

As shown in figure 1, the sealing device capable of preventing the exhaust manifold from loosening is characterized in that an elastic element I8 is further arranged in the cavity, two ends of the elastic element I8 are respectively connected with the upper gasket 4 and the lower gasket 5, when the upper gasket 4 and the lower gasket 5 of the exhaust manifold gasket body 1 are subjected to large impact force, the elastic element I8 can play a role in buffering and shock absorption, and the elastic element I8 is a spring.

Example 3

The present invention is further illustrated on the basis of example 1.

As shown in figure 1, according to the sealing device capable of preventing the exhaust manifold from loosening, the elastic elements II 9 are arranged between the radiating element 7 and the upper gasket 4 and the lower gasket 5, the radiating element 7 is connected with the upper gasket 4 and the lower gasket 5 through the elastic elements II 9, when the positions of the upper gasket 4 and the lower gasket 5 are automatically adjusted, the radiating element 7 can be automatically adjusted, the radiating element 7 is prevented from being damaged, the service life of the exhaust manifold gasket body 1 is prolonged, the elastic elements II 9 are made of high-temperature-resistant elastic materials, and the high-temperature-resistant elastic materials, the radiating fins and the springs are made of common materials or parts in the prior art.

The above embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The sealing device capable of preventing the exhaust manifold from loosening is characterized by comprising an exhaust manifold gasket body (1), wherein a through hole (2) and a mounting hole (3) are formed in the exhaust manifold gasket body (1), the exhaust manifold penetrates through the through hole (2), the exhaust manifold gasket body (1) is installed between the exhaust manifold and the engine cylinder through the installation hole (3) and the fastener, the exhaust manifold gasket body (1) comprises an upper gasket (4) and a lower gasket (5), an elastic connecting part (6) is arranged between the upper gasket (4) and the lower gasket (5), the elastic connecting part (6) is positioned between the lower end of the upper gasket (4) and the upper end of the lower gasket (5), the lower end of the upper gasket (4), the upper end of the lower gasket (5) and the elastic connecting part (6) are connected to form a cavity, and a radiating element (7) is arranged in the cavity;

an elastic element I (8) is further arranged in the cavity, and two ends of the elastic element I (8) are respectively connected with the upper gasket (4) and the lower gasket (5); the elastic connecting part (6) is made of high-temperature resistant elastic material.

2. The sealing device capable of preventing the exhaust manifold from loosening according to claim 1, wherein a second elastic element (9) is arranged between the heat radiating element (7) and the upper gasket (4) and the lower gasket (5).

3. Sealing device capable of preventing exhaust manifold loosening according to claim 1 or 2, characterized in that the heat dissipating element (7) is a heat sink.

4. The sealing device capable of preventing the exhaust manifold from loosening according to claim 1, wherein the first elastic element (8) is a spring.

5. The sealing device capable of preventing the exhaust manifold from loosening according to claim 2, wherein the second elastic element (9) is made of high-temperature resistant elastic material.