CN212509944U - Sealing gasket of supercharger - Google Patents

Abstract

A sealing gasket of a supercharger comprises an upper sheet body and a lower sheet body which are mutually overlapped, wherein a central hole for air to pass through penetrates through the middle parts of the upper sheet body and the lower sheet body, a plurality of mounting holes penetrate through the edges of the upper sheet body and the lower sheet body, and an annular convex rib which is arranged at the periphery of the central hole and protrudes outwards is arranged between the upper sheet body and the lower sheet body; the annular convex ribs are internally provided with a middle sheet body, and the middle sheet body is arranged on the lower sheet body when being installed and has a gap with the upper sheet body; the middle sheet body is an elastic body and can be contacted with the upper sheet body and the lower sheet body when the upper sheet body and the lower sheet body work. The corrugation of the sealing gasket, i.e. the annular convex rib, is always tightly attached through the elastic reaction force of the middle sheet body so as to achieve the sealing effect.

Description

Sealing gasket of supercharger

Technical Field

The utility model relates to an automobile parts field especially relates to a seal gasket of booster.

Background

At present, due to the increase of the number of automobiles, the environmental pollution is increasingly serious, and national oil consumption regulations are increasingly strict. In order to reduce fuel consumption, there are more and more models of engines on the market, which mount an exhaust gas turbocharger. However, the working environment of the exhaust outlet of the turbocharger is severe, the exhaust temperature is high and can reach 1000 ℃, and corrosive exhaust gas is contained in the exhaust, so that the requirements on the temperature resistance and the corrosion resistance of the sealing gasket are high. The gasket is used at the joint of the exhaust manifold outlet flange and the supercharger inlet flange. For example, the utility model is named as 'a sealing gasket structure of a supercharger' with publication number of CN209308826U application date 2018, 12 and 29. The gasket is conventionally designed as shown in fig. 1, and the stainless steel plate is corrugated. The sealing principle is that after the gasket is installed, flange faces on two sides of the flange clamp the gasket, the gasket is compressed in a corrugated mode, and the corrugations of the two sides abut against the corrugations of the two sides to form reacting force by means of the elastic property of stainless steel. After the engine is ignited, the two flange surfaces generate a gap, and the corrugation of the sealing gasket is tightly attached to the two flange surfaces through elastic reaction force so as to achieve the sealing effect.

However, in the prior art, the gasket sealing corrugation is designed into a conventional design, and the gap between the two flanges, which is generated by vibration, is made up through the elastic property of metal. The gasket is used at the joint of the outlet of the exhaust manifold and the inlet of the supercharger, and the temperature of some supercharger designs is higher. Furthermore, when the temperature of the gasket material on the market, generally SUS301, exceeds 470 ℃, the mechanical property is partially lost, and the metal elasticity is reduced. The resilience force of the gasket is smaller and smaller, the resilience amount is smaller and smaller, and the resilience amount is not enough to make up for gaps between flange surfaces generated by vibration of an engine, so that leakage is caused. After the machine is disassembled due to leakage, the corrugations of the gasket are flattened and lose resilience, and the height of the residual corrugations is about 0.03-0.05.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a reduce booster seal gasket who leaks.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model discloses a seal gasket of supercharger, include: the upper sheet body and the lower sheet body are mutually overlapped, a central hole for air to pass through is formed in the middle of each of the upper sheet body and the lower sheet body, a plurality of mounting holes are formed in the edges of the upper sheet body and the lower sheet body in a penetrating mode, and an annular convex rib which is arranged on the periphery of the central hole and protrudes outwards is arranged between the upper sheet body and the lower sheet body;

the annular convex rib is internally provided with a middle sheet body, and the middle sheet body is arranged on the lower sheet body when being installed and has a gap with the upper sheet body;

the middle sheet body is an elastic body and can be in contact with the upper sheet body and the lower sheet body when the upper sheet body and the lower sheet body work.

Further, annular protruding muscle including set up annular groove body one on last lamellar body and set up annular groove body two on the lamellar body down, annular groove body one and annular groove body two all encircle along circumference centre bore, annular groove body one and annular groove body two corresponding and protruding towards opposite direction, through the coincide last lamellar body and lower lamellar body can make this annular groove body one and annular groove body two dock and form annular protruding muscle, annular groove body one and annular groove body two dock the back vacuole formation.

Furthermore, the cross section of the annular convex rib is in a trapezoidal structure.

Further, the middle sheet body is a mica plate.

Further, the material of the middle sheet body is inconel.

Further, the cross-sectional shape of the middle sheet body is rectangular.

In the technical scheme, the utility model provides a booster gasket has following beneficial effect: the punched middle sheet body is put into the welding machine when the upper sheet body and the lower sheet body are welded, and a new process and new equipment are not needed; the sealing corrugation is supported after installation by the heat resistance, elasticity and thermal expansibility of the phlogopite material.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.

FIG. 1 is a schematic view of a prior art supercharger gasket construction;

FIG. 2 is a schematic top view of a gasket according to the present invention;

fig. 3 is a schematic cross-sectional structure of fig. 2 according to the present invention.

Description of reference numerals:

1. an upper sheet body; 2. a lower sheet body; 3. a central bore; 4. mounting holes; 5. an annular convex rib; 6. a middle sheet body; 8. a first annular groove body; 9. and a second annular groove body.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.

Referring to fig. 1-3, the supercharger gasket of the present invention comprises: the upper sheet body 1 and the lower sheet body 2 are overlapped with each other, a central hole 3 for air to pass through is penetrated through the middle parts of the upper sheet body 1 and the lower sheet body 2, a plurality of mounting holes 4 are penetrated through the edges of the upper sheet body 1 and the lower sheet body 2, and an annular convex rib 5 which is arranged at the periphery of the central hole 3 and protrudes outwards is arranged between the upper sheet body 1 and the lower sheet body 2; the two annular ribs 5 form a cavity inside. The cavity is internally provided with a middle sheet body 6, and the middle sheet body 6 is arranged on the upper surface of the lower sheet body 2 when being installed and has a gap with the upper sheet body 1;

the middle sheet 6 is an elastic body and can contact with the upper sheet 1 and the lower sheet 2 when the upper sheet 1 and the lower sheet 2 work. Especially, the sealing gasket is made of expansion materials, the annular convex rib 5 can be extruded after certain expansion to be tightly abutted against two opposite surfaces of the supercharger and the exhaust manifold, and the sealing gasket has a better sealing effect compared with the existing sealing gasket.

A supercharger seal gasket is used between the supercharger flange and the supercharger exhaust system flange. When assembling, the middle sheet body 6 and the upper sheet body 1 have a gap, and the gap is preferably 0.5 mm; mica can not be made too thick, otherwise, when the bolt is tightened in the mounting hole 4 during the installation of the supercharger, the gasket can not be flattened, and gaps exist on the side surface of the gasket. Compared with the method that the expanding agent is directly filled in the cavity formed by the upper annular convex rib 5 and the lower annular convex rib 5, the method is simple to operate, and when the upper sheet body 1 and the lower sheet body 2 can be used, the middle sheet body 6 is replaced independently without replacing the gasket with the expanding agent integrally, so that the cost is saved. During operation, only the middle gasket needs to be placed on the lower sheet body 2, a certain gap is reserved, the gasket is integrally adjusted by a certain amount when the gasket is convenient to install, and the gasket is kept to be flattened.

Annular protruding muscle 5 is including offering annular groove body one 8 on last lamellar body 1 and offering annular groove body two 9 on lamellar body 2 down, annular groove body one 8 and annular groove body two 9 are all along circumference encircleing centre bore 3, annular groove body one 8 and annular groove body two 9 position are corresponding and protruding towards opposite direction, can make this annular groove body one 8 and annular groove body two 9 butt joint form annular protruding muscle 5 through laminating last lamellar body 1 and lower lamellar body 2, annular groove body one 8 and annular groove body two 9 butt joint back vacuole formation. The section shape of the annular convex rib 5 along the edge of the central hole 3 is a trapezoidal structure.

Preferably, the intermediate sheet 6 is a phlogopite. The mica plate is prepared by bonding mica paper and organic silicon glue, heating and pressing, wherein the content of mica is about 90%, and the content of organic silicon glue is 10%. The middle sheet 6 is a thin sheet with elasticity and hardness of 2-3. More preferably, HP-8 hard auro mica plate is adopted. The product is golden, and has a temperature resistance level of 850 ℃ under a continuous use condition and 1050 ℃ under an intermittent use condition. The texture of the golden mica plate is soft, and the golden mica plate is soft in supporting the sealing corrugation, so that the sealing cannot be negatively influenced; the heat resistance of the auromite plate is better, and the performance loss is less under the high-temperature environment; the phlogopite expands when heated, the metal mechanical property of the metal sealing corrugation is reduced under a high-temperature condition, the rebound resilience is reduced, the phlogopite expands when heated, and the phlogopite supports the sealing corrugation when the mechanical property of the metal plate is reduced.

Preferably, the material of the middle sheet 6 is inconel. The Inconel718 alloy is preferably an inco718 material, has good comprehensive performance within the temperature range of-253-700 ℃, has the yield strength below 650 ℃ at the first position of a deformation high-temperature alloy, and has good fatigue resistance, radiation resistance, oxidation resistance, corrosion resistance, good processability and good welding performance. Can manufacture various parts with complex shapes, and has wide application in aerospace, nuclear energy, petroleum industry and extrusion dies in the temperature range. Easy processability; high tensile strength, fatigue strength, creep strength and rupture strength at 700 ℃; high oxidation resistance at 1000 ℃; stable chemical properties at low temperature; good welding performance.

The metal gasket is combined with the phlogopite plate and placed on the inner side of the sealing gasket, and the middle sheet body 6 is used for supporting the metal gasket to seal the corrugation so as to realize sealing.

Preferably, the cross-sectional shape of the intermediate sheet 6 is rectangular. The middle sheet body is designed into a ring shape matched with the overall shape of the central hole 3, and when the section shape along the edge of the central hole is rectangular, the middle sheet body is directly punched in the machining process, so that the machining is convenient.

The sealing form of the common gasket is that stainless steel materials are pressed into an arch shape, but the stainless steel materials are elastic, and the arch shape can rebound to form sealing when two flange surfaces press the arch shape. The arch-shaped sealing corrugation acts like a spring against both sides to ensure that no leakage occurs. And the booster position is that whole engine temperature is higher position stainless steel material mechanical properties can lose under the high temperature condition, and under the condition that two flange faces of engine work were constantly patted, sealed ripple can constantly compress and kick-backs, but because mechanical properties loses, the volume of kick-backing and resilience force also can lose, reduces the durability, and similar spring resilience volume has been little will form a little gap and production with the flange. The mica plate is soft in the first characteristic and is elastic when being placed in the corrugation, so that the sealing corrugation can be elastically sealed; secondly, the stainless steel expands when heated, the thermodynamic property of the stainless steel is lost, the elasticity is reduced, and the mica ring in the middle of the stainless steel starts to expand elastically after being heated and pushes against the sealing corrugation, so that the elasticity is increased.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims (6)

1. A sealing gasket of a supercharger is characterized by comprising an upper sheet body (1) and a lower sheet body (2) which are mutually overlapped, wherein a central hole (3) through which gas can pass is formed in the middle of the upper sheet body (1) and the lower sheet body (2), a plurality of mounting holes (4) are formed in the edges of the upper sheet body (1) and the lower sheet body (2) in a penetrating manner, and an annular convex rib (5) which is arranged on the periphery of the central hole (3) and protrudes outwards is arranged between the upper sheet body (1) and the lower sheet body (2);

the annular convex rib (5) is internally provided with a middle sheet body (6), and the middle sheet body (6) is arranged on the lower sheet body (2) when being installed and has a gap with the upper sheet body (1);

the middle sheet body (6) can be in contact with the upper sheet body (1) and the lower sheet body (2) when the upper sheet body (1) and the lower sheet body (2) work.

2. The gasket seal of supercharger according to claim 1, wherein the annular rib (5) comprises a first annular groove (8) formed in the upper sheet body (1) and a second annular groove (9) formed in the lower sheet body (2), the first annular groove (8) and the second annular groove (9) surround the central hole (3) along the circumferential direction, the first annular groove (8) and the second annular groove (9) are opposite in position and protruding in the opposite direction, the first annular groove (8) and the second annular groove (9) can be butted to form the annular rib (5) by overlapping the first upper sheet body (1) and the second annular groove (2), and a cavity is formed after the first annular groove (8) and the second annular groove (9) are butted.

3. Supercharger sealing gasket according to claim 2, characterized in that the cross-sectional shape of the annular bead (5) is a trapezoidal structure.

4. Supercharger seal gasket according to claim 1, characterized in that the intermediate sheet (6) is a phlogopite.

5. Supercharger seal gasket according to claim 1, characterised in that the material of the intermediate sheet (6) is inconel.

6. Supercharger seal gasket according to claim 1, characterized in that the cross-section of the intermediate sheet (6) is rectangular.

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