A high-pressure resistant vibration-resistant multi-layer metal sealing gasket for a cylinder head of a vehicle

Abstract

This utility model provides a high-pressure vibration resistant multi-layer metal sealing gasket for automotive cylinder heads, relating to the field of sealing gasket technology. It includes an outer ring and a shock-absorbing component. The shock-absorbing component includes an outer cover fixedly connected to the top and bottom of the inner wall of the outer ring, with an inner ring fixedly connected inside the two outer covers, and a bent shock-absorbing ring fixedly connected to the outer side of the inner ring. An outer pressure-resistant component includes an inclined plate fixedly connected to the inner side of the outer ring, with a right-angle bent plate fixedly connected to the end of the inclined plate away from the outer ring. Three sets of bent shock-absorbing rings are provided, with a nickel-titanium alloy material at the adjacent end of each bent shock-absorbing ring. This design achieves adaptive compensation for sealing stress across the entire temperature range, retaining the high strength of the metal gasket while achieving multiple composite elastic compensation capabilities. It effectively solves the problems of easy plastic deformation of gaskets and the lack of elastic compensation in single metal flat gaskets.

Description

Technical Field

[0001] This utility model relates to the field of sealing gasket technology, and in particular to a multi-layer metal sealing gasket for automotive cylinder heads that is resistant to high pressure vibration. Background Technology

[0002] In existing technologies, the sealing of the mating surface between the cylinder head and the engine block is a crucial aspect of ensuring the normal operation of the engine. Its sealing performance directly affects the engine's power output, fuel economy, and operational safety. Currently, the sealing elements commonly used in the industry are mostly gaskets with traditional structures, including asbestos-based composite gaskets, single metal flat gaskets, and ordinary encapsulated gaskets, etc.

[0003] As engines develop towards higher power and higher compression ratios, the combustion pressure inside the cylinder continues to increase. Traditional asbestos gaskets, due to their low material strength, are prone to plastic deformation under high pressure, leading to sealing failure. Although single metal flat gaskets have higher strength, they lack sufficient elastic compensation capacity. When there are micro-undulations between the cylinder block and cylinder head due to processing errors, they cannot eliminate the gap through their own deformation, and local leakage is likely to occur under the impact of high-pressure combustion gases.

[0004] Therefore, this utility model provides a multi-layer metal sealing gasket for automotive cylinder heads that is resistant to high pressure vibration. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a multi-layer metal sealing gasket for automotive cylinder heads that is resistant to high pressure vibration.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-pressure vibration resistant multilayer metal sealing gasket for automotive cylinder heads, including an outer ring and an anti-vibration component. The anti-vibration component includes an outer cover fixedly connected to the top and bottom of the inner wall of the outer ring, an inner ring fixedly connected inside the two outer covers, and a bent anti-vibration ring fixedly connected to the outer side of the inner ring.

[0007] The outer compression-resistant component includes an inclined plate fixedly connected to the inner side of the outer ring, and a right-angle bent plate fixedly connected to the end of the inclined plate away from the outer ring.

[0008] In a preferred embodiment, the bent anti-seismic rings are provided in three sets, and each bent anti-seismic ring has a nickel-titanium alloy at one end.

[0009] In a preferred embodiment, the end of the right-angle bent plate near the outer ring is provided with a nickel-chromium alloy.

[0010] In a preferred embodiment, the angle between the inclined plate and the outer ring is 45°.

[0011] In a preferred embodiment, the thickness of the inclined plate increases from the outer ring toward the right-angle bending plate.

[0012] In a preferred embodiment, the nickel-chromium alloy is embedded in a corrugated shape inside the right-angle bent plate, and the corrugation period is 2 mm.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] This invention uses a rigid outer frame to drive the outer cover to synchronously transmit bolt tightening force, which in turn drives the inner ring to form the first metal hard seal. This causes the wave structure of the three sets of bent shock-resistant rings to produce circumferential elastic recovery, thereby causing the nickel-titanium alloy to actively contract or expand during thermal cycles. This achieves adaptive compensation of sealing stress across the entire temperature range. This design retains the high strength of the metal gasket while obtaining multiple composite elastic compensation capabilities. It effectively solves the problems of easy plastic deformation of gaskets and lack of elastic compensation of single metal flat gaskets. Attached Figure Description

[0015] Figure 1 A perspective view of a high-pressure vibration resistant multilayer metal sealing gasket for automotive cylinder heads provided by this utility model;

[0016] Figure 2 A schematic diagram of the anti-vibration component structure of a high-pressure vibration resistant multilayer metal sealing gasket for automotive cylinder heads provided by this utility model;

[0017] Figure 3 A schematic diagram of the outer cover structure of a high-pressure vibration resistant multilayer metal sealing gasket for automotive cylinder heads provided by this utility model;

[0018] Figure 4 A schematic diagram of the outer pressure-resistant component structure of a multi-layer metal sealing gasket for a high-pressure vibration resistant automotive cylinder head provided by this utility model;

[0019] Figure 5 A schematic diagram of the inclined plate structure of a multi-layer metal sealing gasket for a high-pressure vibration resistant automotive cylinder head provided by this utility model.

[0020] Legend:

[0021] 1. Outer ring;

[0022] 2. Seismic resistant components; 21. Outer cover; 22. Inner ring; 23. Bending seismic resistant ring; 24. Nickel-titanium alloy;

[0023] 3. Outer layer anti-compression components; 31. Inclined plate; 32. Right-angle bent plate; 33. Nickel-chromium alloy. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1 - Figure 3 As shown, this embodiment provides a technical solution: a high-pressure vibration resistant multilayer metal sealing gasket for automotive cylinder heads, including an outer ring 1 and an anti-vibration component 2. The anti-vibration component 2 includes an outer cover 21 fixedly connected to the top and bottom of the inner wall of the outer ring 1. An inner ring 22 is fixedly connected inside the two outer covers 21. A bent anti-vibration ring 23 is fixedly connected to the outer side of the inner ring 22. Three sets of bent anti-vibration rings 23 are provided. A nickel-titanium alloy 24 is provided at one end of each bent anti-vibration ring 23.

[0026] The outer ring 1 serves as the overall skeleton of the gasket, providing an installation reference and outer sealing boundary for the anti-vibration component 2 and the outer pressure-resistant component 3. This ensures that the gasket maintains its overall shape under the tightening force of the cylinder head bolts, preventing edge warping or tearing and improving assembly reliability. The outer cover 21 and the outer ring 1 together form a clamping space, encapsulating the inner ring 22 and the bent anti-vibration ring 23 within it, forming a closed multi-layered metal cavity that prevents combustion gases, coolant, or engine oil from leaking from the side of the gasket. The inner ring 22 is arranged directly around the cylinder bore, serving as the first sealing surface for the high-temperature, high-pressure combustion gases in the combustion chamber. The bent anti-vibration ring 23 utilizes the wave formed by the bending of the metal. The structure provides elastic restoring force under axial bolt loads and cylinder head vibration. The wavy bends absorb alternating engine loads and reduce bolt preload attenuation. The three parallel structures make the sealing stress more evenly distributed along the circumference, preventing local air and liquid leakage. The nickel-titanium alloy 24 is located at the adjacent ends of each set of bent anti-vibration rings 23. Utilizing the shape memory effect and superelasticity of nickel-titanium, it generates additional clamping force when the temperature changes or stress is released. When the engine is cold-started, the nickel-titanium alloy 24 contracts to compensate for the sealing gap caused by thermal expansion differences. When operating at high temperatures, it generates restoring force to continuously compress the bent anti-vibration rings 23 and extend the gasket life.

[0027] like Figure 3 - Figure 5 As shown, the outer pressure-resistant component 3 includes an inclined plate 31 fixedly connected to the inner side of the outer ring 1. A right-angle bent plate 32 is fixedly connected to the end of the inclined plate 31 away from the outer ring 1. A nickel-chromium alloy 33 is provided at the end of the right-angle bent plate 32 close to the outer ring 1. The angle between the inclined plate 31 and the outer ring 1 is 45°. The thickness of the inclined plate 31 increases from the outer ring 1 towards the right-angle bent plate 32. The nickel-chromium alloy 33 is corrugated and embedded in the inner side of the right-angle bent plate 32 with a corrugation period of 2 mm.

[0028] The inclined plate 31 forms an angle with the horizontal, decomposing the radial load transmitted by the outer ring 1 into axial and lateral components, causing the right-angle bent plate 32 to generate additional sealing pressure pointing towards the inner ring 22. The right-angle bent plate 32 forms a secondary sealing lip, which together with the inner ring 22 constitutes a double sealing line. At the same time, it provides additional elastic deformation capacity through the bending part. The nickel-chromium alloy 33 is embedded in the end of the right-angle bent plate 32 near the outer ring 1. The high temperature strength and oxidation resistance of the nickel-chromium alloy 33 protect the right-angle bent plate 32 from oxidation and ablation on the high temperature gas side.

[0029] like Figure 1 - Figure 5 As shown:

[0030] In use: First, the cylinder head bolts apply axial clamping force to the outer ring 1. The outer ring 1, as a rigid skeleton, maintains its overall contour without warping. Then, the pressure is synchronously transmitted to the inner ring 22 through the outer cover 21 at its top and bottom ends. This causes the inner ring 22 to form the first metal layer towards the combustion chamber orifice. After the inner ring 22 is compressed, the three sets of bent anti-vibration rings 23 on its outer side are compressed synchronously. The bent wave structure produces circumferentially uniform and recoverable elastic deformation, thereby driving the entire anti-vibration assembly 2 to continuously output rebound compensation force, realizing the dynamic balance of sealing stress under alternating loads. When the engine cold start temperature drops sharply, the nickel-titanium alloy 24 actively contracts due to the shape memory effect, pulling the ends of the adjacent bent anti-vibration rings 23 to further close, which can instantly compensate for the micro gaps caused by thermal expansion differences. When entering high-temperature conditions, the superelastic recovery force of the nickel-titanium alloy 24 is released, pushing the bent anti-vibration rings 23 outward to expand, thereby continuously pressing the inner ring 22 and the outer cover 21, realizing the adaptive enhancement of sealing pressure and the extension of gasket life across the entire temperature range.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A multilayer metal gasket for high pressure vibration resistant cylinder heads for vehicles, comprising an outer ring (1), characterized in that, It also includes a seismic-resistant component (2), which includes an outer cover (21) fixedly connected to the top and bottom of the inner wall of the outer ring (1), an inner ring (22) fixedly connected inside the two outer covers (21), and a bent seismic-resistant ring (23) fixedly connected to the outer side of the inner ring (22). The outer pressure-resistant component (3) includes an inclined plate (31) fixedly connected to the inner side of the outer ring (1), and a right-angle bent plate (32) is fixedly connected to the end of the inclined plate (31) away from the outer ring (1).

2. The high-pressure vibration resistant multilayer metal sealing gasket for automotive cylinder heads according to claim 1, characterized in that: The bending anti-seismic ring (23) is provided in three sets, and each bending anti-seismic ring (23) is provided with a nickel-titanium alloy (24) at one end.

3. A high pressure resistant and vibration resistant multi-layer metallic gasket for cylinder head of vehicle as recited in claim 1, wherein: The right-angle bent plate (32) is provided with a nickel-chromium alloy (33) at one end near the outer ring (1).

4. The high pressure resistant and vibration resistant multi-layer metallic gasket for cylinder head of vehicle according to claim 1, characterized in that: The angle between the inclined plate (31) and the outer ring (1) is 45°.

5. The high pressure resistant and vibration resistant multi-layer metallic gasket for cylinder head of vehicle according to claim 1, characterized in that: The thickness of the inclined plate (31) increases from the outer ring (1) toward the right-angle bent plate (32).

6. A high pressure resistant, vibration resistant, multi-layer metallic gasket for use in a cylinder head of an automotive engine according to claim 3, wherein: The nickel-chromium alloy (33) is embedded in the inside of the right-angle bent plate (32) in a corrugated shape with a corrugation period of 2 mm.

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