CN212338156U

CN212338156U - Engine variable-rib high metal gasket

Info

Publication number: CN212338156U
Application number: CN202020338714.4U
Authority: CN
Inventors: 叶洁
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2021-01-12
Anticipated expiration: 2030-03-18

Abstract

The utility model discloses a high metal gasket of engine variable muscle, its characterized in that: the gasket comprises at least a first gasket and a second gasket which are mutually welded in a lap joint manner, wherein the first gasket and the second gasket are plane bodies and are provided with at least one corresponding waist-shaped hole; four bolt mounting holes are correspondingly formed in the first gasket and the second gasket which surround the four opposite angles of the waist-shaped hole; the first gasket and the second gasket surrounding the outer periphery of the waist-shaped hole are respectively provided with an arc-shaped raised sealing rib protruding out of the plane body to form a sealing edge of the gasket; the sealing edge comprises a low rib section arranged between two bolt mounting holes along the short side direction of the waist-shaped hole and a high rib section arranged between two bolt mounting holes along the long side direction of the waist-shaped hole. The utility model discloses an adjustment sealing rib height, the segmentation sets up the mode that different muscle is high and solves fatigue failure, local gas leakage scheduling problem.

Description

Engine variable-rib high metal gasket

Technical Field

The utility model relates to the technical field of engines, specifically a high metal gasket of engine variable muscle.

Background

On the engine, there are many parts needing sealing, especially high temperature and high pressure parts, which have higher sealing requirements, such as an exhaust pipe and a supercharger, and the exhaust pipe and the supercharger are important parts of an exhaust system of the engine. Along with the continuous upgrading of engine emission, when the engine works, the temperature of high-temperature exhaust gas exhausted from a combustion chamber is higher and higher, and high-temperature gas firstly enters an exhaust pipe through a cylinder cover exhaust passage, then enters a supercharger, finally passes through a supercharger vortex exhaust pipeline and enters the atmosphere after being treated by a catalytic silencer. In order to ensure the normal work and safety of the engine and prevent the leaked high-temperature gas from damaging other parts of the engine and causing damage to human bodies due to high temperature, a sealing gasket with high temperature resistance and good reliability needs to be arranged at the connecting part of the exhaust pipe and the supercharger.

The sealing gasket structure of the current common exhaust system mainly comprises:

1. a single-layer metal gasket is adopted, and a simple sealing rib is arranged on the periphery of the exhaust port.

2. As shown in figure 1, two layers of metal gaskets adopting stitch welding are respectively provided with convex arc sealing ribs facing a sealing surface, and two gaskets with the same structure are welded together through an even welding point.

At present, the following problem exists in current exhaust system seal gasket:

1. is easily ablated at high temperature, thereby causing fatigue failure.

2. The requirement on the pretightening force of an exhaust system is high, the surface pressure of the sealing rib part is uneven, and the risk of local air leakage between two screw holes due to overlarge mounting distance of fastening bolts exists in work.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned current defect, the utility model aims to provide an engine becomes muscle high metal gasket, through adjusting sealed rib height, the segmentation sets up the high mode of different muscle and solves fatigue failure, local gas leakage scheduling problem.

The technical scheme of the utility model as follows:

1. a variable-rib high-metal gasket for an engine comprises a first gasket and a second gasket which are welded in an overlapped mode, wherein the first gasket and the second gasket are plane bodies and are provided with at least one kidney-shaped hole penetrating through the first gasket and the second gasket; four bolt mounting holes are correspondingly formed in the first gasket and the second gasket around four opposite corners of the waist-shaped hole;

the first gasket and the second gasket surrounding the outer periphery of the waist-shaped hole are respectively provided with an arc-shaped raised sealing rib protruding out of the plane body to form a sealing edge of the gasket; the sealing edge comprises a low rib section and a high rib section, wherein the low rib section is arranged between two bolt mounting holes in the short side direction of the waist-shaped hole, the high rib section is arranged between two bolt mounting holes in the long side direction of the waist-shaped hole, and the height of the low rib section is lower than that of the high rib section.

Specifically, the arc-shaped convex sealing rib is a protrusion formed on the material of the first gasket and the material of the second gasket respectively.

Preferably, the number of the waist-shaped holes is two, and the waist-shaped holes are respectively arranged in parallel.

Preferably, the height of the low rib section is 0.7-1.1 mm.

Preferably, the height of the high rib section is 1.3-1.7 mm.

Preferably, the height difference between the high rib section and the low rib section is 0.6 mm.

The utility model has the advantages that:

because the height of the sealing rib is adjusted, the heights of different ribs are set in sections, when the bolt is pressed, the pressing force at the central connecting line position of two screw holes is the largest, the pressing force at the position close to the bolt flange is larger, and the low rib section is arranged at the central connecting line position of the two screw holes to play a sealing role; the high rib section is arranged at the position where the central connecting line of the two screw holes can not be pressed and the distance between the screw holes is large, so that the effect of compensating the uneven pressing force caused by the structural defects is achieved, the sealing effect is achieved, the high-temperature and high-pressure gas leakage is prevented, and therefore the metal gasket can effectively prevent the sealing gasket from being fatigued due to the fact that the screw holes are unevenly arranged and bolt torque changes such as cold and hot deformation of a sealing surface and vibration impact and the like cause sealing gasket failure in the working process of an engine due to structural limitation, the sealing effect of an engine exhaust-pressurization system is greatly improved, and the normal work and safety of the engine are effectively guaranteed.

Drawings

FIG. 1 is a schematic view of a gasket seal of the prior art.

Fig. 2 is the utility model discloses an engine becomes whole sketch map of muscle high metal gasket.

Fig. 3 is a cross-sectional view of a position B-B of a rib-variable high metal gasket of an engine according to an embodiment of the present invention.

Fig. 4 is a cross-sectional view of the engine rib-changing high metal gasket C-C according to the embodiment of the present invention.

Fig. 5 is a cross-sectional view of a low rib section of a variable rib high metal gasket of the utility model discloses an engine.

Fig. 6 is a cross-sectional view of a high rib section of a variable rib high metal gasket of the utility model provides an engine.

Fig. 7 is a schematic view illustrating the first gasket and the second gasket according to the embodiment of the present invention.

In the figure, 1-a first gasket, 2-a second gasket, 3-a low rib section, 4-a high rib section, 5-a bolt mounting hole and 6-a kidney-shaped hole.

Detailed Description

In order to explain the technical content, the achieved objects and the effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.

Fig. 1 to 7 are schematic diagrams of a rib-variable high metal gasket of an engine according to the present embodiment, which may be used in an exhaust system of the engine, and may also be used in sealing of other kidney-shaped holes. As shown in fig. 7, the rib-height-variable metal gasket of the present embodiment is formed by stitch welding two layers of gaskets, namely, a first gasket 1 and a second gasket 2, wherein the first gasket 1 and the second gasket 2 are planar bodies and are provided with at least one kidney-shaped hole 6 penetrating through the first gasket 1 and the second gasket 2; four bolt mounting holes 5 are correspondingly arranged on the first gasket 1 and the second gasket 2 which surround four opposite angles of the waist-shaped hole 6; when the gasket is installed, the whole gasket of the present embodiment is located between the exhaust pipe and the supercharger of the engine, and the installation bolt passes through the bolt installation hole 5 to connect the whole gasket, the exhaust pipe and the supercharger together. Wherein, the first gasket 1 is respectively provided with arc convex sealing ribs facing the sealing surface of the exhaust pipe around a kidney-shaped hole 6 surrounding the exhaust pipe; in addition, the second gasket 2 faces the arc convex sealing rib of the sealing surface of the supercharger; the first gasket 1 and the second gasket 2 are respectively provided with an arc-shaped protruding sealing rib protruding out of the plane body to form a sealing edge of the gasket; the sealing rim comprises a low rib section 3 arranged between two bolt mounting holes 5 along the short side direction of the kidney-shaped hole 6, as shown in fig. 4 and 5; and a high rib section 4 arranged between the two bolt mounting holes 5 along the long side direction of the kidney-shaped hole 6, as shown in fig. 3 and 6, the height of the low rib section 3 is lower than that of the high rib section 4.

When an engine works, the rib-variable high-metal gasket related to the technical scheme is arranged on a first layer of gasket 1 and a second layer of gasket 2 which are respectively connected with an exhaust pipe and a supercharger sealing surface, due to structural limitation, bolts of the exhaust pipe and the supercharger connecting flange surface are not arranged at the same distance, when the bolts are tightly pressed, the pressing force of the central connecting line of two screw holes is the largest, the pressing force of the position close to the bolt flange is larger, and a low-rib high section 3 is arranged at the central connecting line of the two screw holes to play a role in sealing; the high-rib high section 4 is arranged at a position where the central connecting line of the two screw holes can not be pressed and the distance between the screw holes is large, so that the effect of compensating the uneven pressing force caused by structural defects is achieved, the sealing effect is achieved, and the high-temperature and high-pressure gas leakage is prevented. Therefore, this metal gasket can prevent effectively that the engine from being in the course of the work, because structural constraint, the screw is arranged inhomogeneously, leads to sealed face cold and hot deformation and bolt moment changes such as vibration impact and the seal gasket that causes is tired to the phenomenon that leads to the leakproofness to become invalid appears, has improved engine exhaust-turbocharging system's leakproofness greatly, has effectively guaranteed the normal work and the safety of engine, has reached the utility model aims.

Preferably, the arc-shaped convex sealing rib is a convex formed on the material of the first gasket 1 and the second gasket 2, and is preferably a complete flange to enhance the sealing performance.

As a preferable scheme of the embodiment, two waist-shaped holes 6 are respectively arranged in parallel, and correspondingly, the number of the bolt mounting holes 5 can be reduced to 6, as shown in fig. 1.

As the preferred scheme of this embodiment, the height of low muscle section 3 is 0.9mm, and the height of high muscle section 4 is 1.5mm, and high muscle section 4 is 0.6mm with 3 differences in height of low muscle section, utilizes the unsettled error of the long limit expansion deformation formation of gasket to reach sealed effect.

Although the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. The utility model provides an engine becomes muscle high metal gasket which characterized in that: the gasket comprises a first gasket (1) and a second gasket (2) which are welded together, wherein the first gasket (1) and the second gasket (2) are plane bodies and are provided with at least one kidney-shaped hole (6) which penetrates through the first gasket (1) and the second gasket (2); four bolt mounting holes (5) are correspondingly arranged on the first gasket (1) and the second gasket (2) which surround four opposite angles of the waist-shaped hole (6);

the first gasket (1) and the second gasket (2) which surround the outer periphery of the waist-shaped hole (6) are respectively provided with an arc-shaped convex sealing rib which protrudes out of the plane body to form a sealing edge of the gasket; the sealing edge comprises a low rib section (3) arranged between two bolt mounting holes (5) along the short side direction of a waist-shaped hole (6) and a high rib section (4) arranged between two bolt mounting holes (5) along the long side direction of the waist-shaped hole (6), wherein the height of the low rib section (3) is lower than that of the high rib section (4).

2. The engine ribbing high metal gasket of claim 1, wherein: the arc-shaped convex sealing ribs are protrusions formed on the materials of the first gasket (1) and the second gasket (2) respectively.

3. The engine ribbing high metal gasket of claim 1, wherein: the two pairs of the waist-shaped holes (6) are respectively arranged in parallel.

4. The engine ribbing high metal gasket of claim 1, wherein: the height of the low rib section (3) is 0.7-1.1 mm.

5. The engine ribbing high metal gasket of claim 1, wherein: the height of the high rib section (4) is 1.3-1.7 mm.

6. The engine ribbing high metal gasket of claim 1, wherein: the height difference between the high rib section (4) and the low rib section (3) is 0.6 mm.