CN217380740U

CN217380740U - Exhaust manifold sealing gasket

Info

Publication number: CN217380740U
Application number: CN202221323963.1U
Authority: CN
Inventors: 齐洋; 江凤妮; 徐发扬; 杨金才; 陈文凤
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-09-06
Anticipated expiration: 2032-05-30

Abstract

The utility model relates to an exhaust manifold sealing gasket, including upper substrate, middle level base plate and lower floor's base plate, seted up the gas channel hole on the sealing gasket, upper substrate, middle level base plate and lower floor's base plate are provided with the ripple ring along gas channel hole circumference, and upper substrate sets up with middle level base plate symmetry, and the bottom surface of upper substrate ripple ring and the top surface laminating of middle level base plate ripple ring, and middle level base plate sets up with lower floor's base plate symmetry, is provided with the folding turn-ups towards lower floor's base plate at the top surface of middle level base plate ripple ring. Will the utility model is used for sealed between exhaust manifold and the engine cylinder lid can play better sealed effect.

Description

Exhaust manifold sealing gasket

Technical Field

The utility model relates to an automobile part, especially automobile engine's exhaust manifold sealed pad.

Background

The exhaust manifold metal sealing gasket is placed between an engine cylinder cover and the exhaust manifold and plays a role in sealing combustion exhaust gas of an engine. The working temperature of the exhaust system is high, the exhaust system is subjected to the circulation of cold and hot shock, and the sealing environment is very severe. Because high low temperature changes, can lead to exhaust manifold to produce the deformation to lead to the ring flange of being connected with the cylinder cap to warp comparatively seriously, so even the sealed pad of initial assembly has higher pressure, along with operating time's increase, the accumulation deflection increases, can lead to the sealing pressure of sealed faying face to reduce, and the gas can form the leakage passageway in the position that pressure is minimum, causes high-temperature gas to leak.

CN203321697U discloses a sealing gasket for exhaust manifold, which is a three-layer substrate structure, and comprises an upper substrate, a middle substrate and a lower substrate, wherein the sealing gasket is provided with an air passage hole, the upper substrate, the middle substrate and the lower substrate are provided with a corrugated ring along the circumferential direction of the air passage hole, the upper substrate and the middle substrate are symmetrically arranged, the bottom surface of the corrugated ring of the upper substrate is attached to the top surface of the corrugated ring of the middle substrate, the middle substrate and the lower substrate are symmetrically arranged, and a gap is arranged between the top surface of the corrugated ring of the middle substrate and the bottom surface of the corrugated ring of the lower substrate. The flange is heated and deformed more along with the increase of exhaust temperature, and the sealing pressure of the sealing gasket of the structure is not enough to play a better sealing effect.

Disclosure of Invention

The utility model aims at providing an exhaust manifold seals pad uses it sealed between exhaust manifold and the engine cylinder lid, can play better sealed effect.

Exhaust manifold sealed pad, including upper substrate, middle level base plate and lower floor's base plate, seted up the gas channel hole on the sealed pad, upper substrate, middle level base plate and lower floor's base plate are provided with the ripple ring along gas channel hole circumference, upper substrate sets up with middle level base plate symmetry, and the bottom surface of upper substrate ripple ring and the top surface laminating of middle level base plate ripple ring, middle level base plate sets up with lower floor's base plate symmetry, is provided with the folding turn-ups towards lower floor's base plate at the top surface of middle level base plate ripple ring.

The width L1 of the folding flanging and the width L2 of the top surface of the corrugated ring of the middle base plate meet the requirement that L2-L1 are more than or equal to 2 mm.

The thickness of the upper layer substrate and the lower layer substrate is 0.25-0.3 mm, and the thickness of the middle layer substrate is 0.18-0.22 mm.

The upper substrate, the middle substrate and the lower substrate are made of alloy steel.

The utility model discloses top surface at middle level base plate ripple ring is provided with folding turn-ups, it is located between middle level base plate and the lower floor's base plate, make the middle level base plate have two-layer metal sheet, be provided with folding turn-ups that some middle level base plate and lower floor's base plate laminating back, will be gapped between all the other parts's middle level base plate and the lower floor's base plate, exhaust manifold metal sealing gasket is after the assembly of sealing flange face is compressed, elasticity ripple ring pressurized, form sealed line, at exhaust system heating and refrigerated in-process, the continuous deformation that warp of sealed pad, this folding turn-ups can let sealed pad can not accomplish the laminating, thereby make sealed pad can not produce excessive deformation at fatigue in-process, keep resilience ability, thereby avoided because sealing pressure causes sealed pad to produce fatigue and loses sealed resilience ability excessively, cause excessive wearing and tearing, form the gas leakage passageway. Meanwhile, the resilience of the metal sealing gasket under the severe cold and hot impact working condition can be ensured to compensate the deformation of the flange, so that the metal sealing gasket can still keep good sealing performance under the high-temperature condition. After the folding flanging is set, the lowest sealing pressure is increased from 0.5MPa to 2.8MPa through simulation analysis and calculation.

The thickness of the middle-layer substrate is smaller than the thicknesses of the upper-layer substrate and the lower-layer substrate, the overall rigidity of the sealing gasket can be balanced, and the rigidity of the sealing gasket can be reduced, so that the circumferential sealing pressure of the air passage is more uniform, and under the condition of meeting the minimum sealing pressure, the pressure borne by the sealing gasket can be reduced, and the service life of the sealing gasket is prolonged. The sealing gasket is made of common temperature-resistant alloy steel, and alloy steel with better ductility is not needed, so that the production and manufacturing cost is greatly reduced.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a cross-sectional view taken along line a-a of fig. 1.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the exhaust manifold gasket is formed by punching and welding temperature-resistant alloy steel and comprises an upper substrate 3, a middle substrate 2 and a lower substrate 6, an air passage hole 1 is formed in the gasket, the thicknesses of the upper substrate 3 and the lower substrate 6 are 0.25-0.3 mm, and the thickness of the middle substrate 2 is 0.18-0.22 mm. The upper-layer substrate 3, the middle-layer substrate 2 and the lower-layer substrate 6 are provided with corrugated rings 4 along the circumferential direction of the air channel hole, the upper-layer substrate 3 and the middle-layer substrate 2 are symmetrically arranged, the bottom surface of the corrugated ring 4 of the upper-layer substrate 3 is attached to the top surface of the corrugated ring 4 of the middle-layer substrate 2, the middle-layer substrate 2 and the lower-layer substrate 6 are symmetrically arranged, a gap is formed between the top surface of the corrugated ring 4 of the middle-layer substrate 2 and the bottom surface of the corrugated ring 4 of the lower-layer substrate 6, the top surface of the corrugated ring 4 of the middle-layer substrate 2 is provided with a folding flanging 5 facing the lower-layer substrate 6, and the width L1 of the folding flanging 5 and the width L2 of the top surface of the corrugated ring 4 of the middle-layer substrate 2 meet the requirement that L2-L1 is more than or equal to 2 mm.

Claims

1. The utility model provides an exhaust manifold seals pad, includes upper substrate (3), middle level base plate (2) and lower floor's base plate (6), has seted up gas passage hole (1) on the sealing pad, and upper substrate, middle level base plate and lower floor's base plate are provided with ripple ring (4) along gas passage hole circumference, and upper substrate and middle level base plate symmetry set up, and the top surface laminating of the bottom surface of upper substrate ripple ring and middle level base plate ripple ring, and middle level base plate sets up its characterized in that with lower floor's base plate symmetry: the top surface of the middle layer substrate corrugated ring is provided with a folding flanging (5) facing the lower layer substrate.

2. The exhaust manifold gasket according to claim 1, wherein: the width L1 of the folding flanging (5) and the width L2 of the top surface of the middle-layer substrate corrugated ring (4) meet the requirement that L2-L1 are more than or equal to 2 mm.

3. The exhaust manifold gasket according to claim 1, wherein: the thickness of the upper substrate (3) and the lower substrate (6) is 0.25-0.3 mm, and the thickness of the middle substrate (2) is 0.18-0.22 mm.

4. The exhaust manifold gasket according to claim 3, wherein: the upper layer substrate (3), the middle layer substrate (2) and the lower layer substrate (6) are made of alloy steel.