Sealing type gasket for high-temperature water cavity of combustion chamber of diesel engine

Abstract

The sealing type gasket for the high-temperature water cavity of the combustion chamber of the diesel engine comprises an outer wrapping layer of a hollow annular structure, an annular gasket and a round spring, and the annular gasket and the round spring are arranged in an inner cavity of the outer wrapping layer. The circular spring is located on the inner side in an inner cavity of the outer wrapping layer, the annular pad is located on the outer side in the inner cavity of the outer wrapping layer, a gap needed by compression deformation under the high-temperature condition is formed between the circular spring and the annular pad, and an opening is formed in one end face of the outer wrapping layer. The gasket solves the problem that a traditional flat gasket is not tight in sealing due to the fact that the compression amount is large and the resilience amount is small, reduces the deformation amount of an outer wrapping layer, improves the resilience force of the whole gasket, greatly improves the sealing effect of a combustion chamber water cavity, reduces the leakage phenomenon of the combustion chamber high-temperature water cavity in the operation process of a diesel engine, and improves the service life of the diesel engine. Safety and reliability of the diesel engine are improved, and the sealing effect of the diesel engine combustion chamber high-temperature water cavity is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of diesel engines, and in particular relates to a sealing gasket for a high-temperature water cavity of a diesel engine combustion chamber. Background Art

[0002] Diesel engines are widely used in various fields due to their good economic performance, small size, light weight, good maneuverability, high reliability, long service life, and wide power range. As an important part of the diesel engine power output, the diesel engine combustion chamber has a maximum internal temperature of up to 1700°C. The sealing of the combustion chamber and the high-temperature cooling water cavity is particularly important. If high-temperature water drips in the combustion chamber, it will cause incomplete combustion of diesel engine fuel and increase carbon deposits, seriously affecting the efficiency of the diesel engine. In severe cases, it will cause the cylinder liner to lock, the piston connecting rod to be abnormally stressed, and even the cylinder liner and connecting rod to break, or even the connecting rod to fly out of the diesel engine, causing major accidents and casualties. Ordinary copper gaskets are generally concentric flat gaskets with different outer and inner diameters. Although they can be compressed to a large extent, they have a small rebound amount. As time goes by and the diesel engine is affected by factors such as vibration during operation, the clamping force between the gasket and the sealing surface becomes smaller and there is almost no rebound force. During the long-term operation of the diesel engine, ordinary copper gaskets are very likely to have poor sealing, causing high-temperature water to enter the diesel engine combustion chamber, and eventually leading to serious diesel failure. In addition, ordinary copper gaskets must be replaced after disassembly. Therefore, it is necessary to design a gasket with good sealing performance to improve the safety and reliability of diesel engine operation. Summary of the invention

[0003] The technical problem solved by the present invention is as follows: A sealing gasket for a high-temperature water cavity in a combustion chamber of a diesel engine is provided. By optimizing the gasket structure and adopting a sealing gasket composed of a hollow outer layer and an annular gasket and a circular spring arranged inside the outer layer, the problem of poor sealing caused by a large compressible amount and a small rebound amount of a traditional flat gasket is solved, the deformation of the outer layer is reduced, the overall rebound force of the gasket is improved, and it is ensured that the sealing gasket as a whole has a certain strength of rebound force for a long time under long-term operating conditions of the diesel engine, thereby greatly improving the sealing effect of the water cavity in the combustion chamber, reducing the phenomenon of dripping in the high-temperature water cavity in the combustion chamber during the operation of the diesel engine, improving the safety and reliability of the diesel engine, and being suitable for the sealing of the high-temperature water cavity in the combustion chamber of the diesel engine, thereby ensuring the sealing effect of the high-temperature water cavity in the combustion chamber of the diesel engine.

[0004] The technical solution adopted by the present invention is: a sealing gasket for a high-temperature water cavity of a diesel engine combustion chamber, comprising an outer layer with a hollow annular structure and an annular gasket and a circular spring arranged in the inner cavity of the outer layer, wherein the single-side cross-section of the outer layer is a waist-shaped ring structure, the circular spring is located on the inner side of the inner cavity of the outer layer and the annular gasket is located on the outer side of the inner cavity of the outer layer, a gap required for compressive deformation under high temperature conditions is provided between the circular spring and the annular gasket, and an opening is provided on one end face of the outer layer.

[0005] Wherein, the annular pad is made of heat-resistant stainless steel material.

[0006] Furthermore, the outer cladding is made of heat-resistant stainless steel.

[0007] Furthermore, gaps are left between the two side walls of the annular gasket and the two side inner walls of the inner cavity of the outer cladding layer.

[0008] Furthermore, the circular spring is made of high-temperature alloy material.

[0009] Furthermore, the outer diameter of the circular spring is smaller than the inner diameter of the end of the inner cavity of the outer cladding.

[0010] The advantages of the present invention compared with the prior art are:

[0011] 1. This technical solution optimizes the gasket structure and adopts a sealing gasket composed of a hollow outer layer and an annular gasket and a circular spring arranged inside the outer layer, thereby solving the problem of poor sealing caused by the large compressibility and small rebound of the traditional flat gasket, reducing the deformation of the outer layer, and improving the overall rebound force of the gasket, ensuring that the sealing gasket as a whole has a certain strength of rebound force for a long time under the condition of long-term operation of the diesel engine, thereby greatly improving the sealing effect of the water cavity of the combustion chamber;

[0012] 2. This technical solution provides sufficient deformation space for the circular spring and the annular gasket by providing a gap between the circular spring and the annular gasket for compression deformation under high temperature conditions, thereby ensuring that the outer layer will not be severely deformed when squeezed, and also has a certain resilience, providing conditions for reliable sealing of the sealing gasket;

[0013] 3. This technical solution ensures that the outer layer has enough extension space and internal air can be discharged under high temperature conditions and during the extrusion process by opening an opening on one end face of the outer layer;

[0014] 4. This technical solution has a simple structure and novel design. It has good corrosion resistance and oxidation resistance under repeated heating, ensures the sealing of the high-temperature water cavity in the combustion chamber, greatly reduces the dripping of the high-temperature water cavity, improves the safety and reliability of the diesel engine, and is suitable for the sealing of the high-temperature water cavity in the combustion chamber of the diesel engine, ensuring the sealing effect of the high-temperature water cavity in the combustion chamber of the diesel engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 for Figure 1 Middle AA section view;

[0017] Figure 3 for Figure 2 Middle B is a partial enlarged schematic diagram. DETAILED DESCRIPTION

[0018] The following will be combined with the embodiments of the present invention Figure 1-3 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that, in this document, unless otherwise stated, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc., are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0020] In this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further limitations. The elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0021] Sealing gaskets for high temperature water chamber of diesel engine combustion chamber, such as Figure 1-3As shown, it includes an outer layer 1 with a hollow annular structure, an annular pad 2 and a circular spring 3 arranged in the inner cavity of the outer layer 1, wherein the single-side cross-section of the outer layer 1 is a waist-shaped ring structure, the circular spring 3 is located on the inner side of the inner cavity of the outer layer 1 and the annular pad 2 is located on the outer side of the inner cavity of the outer layer 1, and a gap 4 required for compression deformation under high temperature conditions is provided between the circular spring 3 and the annular pad 2, and an opening 5 is provided on one end surface of the outer layer 1 to ensure that the outer layer 1 has sufficient extension space under high temperature conditions and during extrusion and that the internal air can be discharged; in the above structure, by optimizing the gasket structure, the hollow outer layer 1 and the annular spring 2 arranged inside the outer layer 1 are used. The sealing gasket composed of the annular gasket 2 and the circular spring 3 solves the problem of poor sealing caused by the large compressible amount and small rebound amount of the traditional flat gasket, reduces the deformation of the outer layer 1 and improves the rebound force, ensuring that the sealing gasket as a whole has a certain strength of rebound force for a long time under the long-term operation conditions of the diesel engine, thereby greatly improving the sealing effect of the water cavity of the combustion chamber; by providing a gap required for compressive deformation under high temperature conditions between the circular spring 3 and the annular gasket 2, sufficient deformation space is provided for the circular spring 3 and the annular gasket 2, thereby ensuring that the outer layer 1 will not be seriously deformed when squeezed, and still has a certain rebound force, providing conditions for reliable sealing of the sealing gasket;.

[0022] The annular pad 2 is made of heat-resistant stainless steel material, with a material grade of 06Cr18Ni11Ti GB / T20878-2007; the outer cladding 1 is made of heat-resistant stainless steel material, with a material grade of 06Cr25Ni20 GB / T20878-2007; specifically, two side walls of the annular pad 2 respectively leave gaps 4 with the two side inner walls of the inner cavity of the outer cladding 1 (i.e., in the extrusion direction), so that the annular pad 2 serves as the main supporting part of the sealing gasket, ensuring that the outer cladding 1 will not be severely deformed when extruded and has a certain resilience.

[0023] Among them, the circular spring 3 is made of high-temperature alloy material, and the material grade is GH4090GB / T14992-2005; specifically, the outer diameter of the circular spring 3 is smaller than the inner diameter of the inner cavity end of the outer layer 1, and the circular spring 3 is the most important part of the sealing gasket. When the sealing gasket is squeezed as a whole, the radial elastic force of the circular spring 3 is used to ensure that the sealing gasket as a whole has a certain strength of resilience for a long time; in addition, the outer layer 1, the annular gasket 2 and the circular spring 3 have good high temperature resistance, and have good corrosion resistance and oxidation resistance under repeated heating. Based on the above advantages, the sealing of the high-temperature water cavity of the combustion chamber is ensured, and the dripping of the high-temperature water cavity is greatly reduced.

[0024] The technical solution has a simple structure and a novel design, improves the safety and reliability of the diesel engine, is suitable for sealing the high-temperature water cavity of the diesel engine combustion chamber, and ensures the sealing effect of the high-temperature water cavity of the diesel engine combustion chamber.

[0025] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Sealing gasket for high temperature water cavity of diesel engine combustion chamber, characterized by: The invention comprises an outer layer (1) of a hollow annular structure, and an annular pad (2) and a circular spring (3) arranged in the inner cavity of the outer layer (1); the single-side cross-section of the outer layer (1) is a waist-shaped ring structure; the annular pad (2) and the circular spring (3) are concentrically arranged in the inner cavity of the outer layer (1); the circular spring (3) is located on the inner side of the inner cavity of the outer layer (1) and the annular pad (2) is located on the outer side of the inner cavity of the outer layer (1); a gap (4) required for compression deformation under high temperature conditions is provided between the circular spring (3) and the annular pad (2); and an opening (5) located on the outer side of the annular pad (2) is provided on one end surface of the outer layer (1).

2. The sealing gasket for the high temperature water cavity of the diesel engine combustion chamber according to claim 1, characterized in that: The annular pad (2) is made of heat-resistant stainless steel.

3. The sealing gasket for the high temperature water cavity of the diesel engine combustion chamber according to claim 2, characterized in that: The outer cladding (1) is made of heat-resistant stainless steel.

4. The sealing gasket for high temperature water cavity of diesel engine combustion chamber according to claim 3, characterized in that: Gaps (4) are left between the two side walls of the annular gasket (2) and the two side inner walls of the inner cavity of the outer cladding layer (1).

5. The sealing gasket for high temperature water cavity of diesel engine combustion chamber according to claim 1, characterized in that: The circular spring (3) is made of high-temperature alloy material.

6. The sealing gasket for high temperature water cavity of diesel engine combustion chamber according to claim 1, 2, 3, 4 or 5, characterized in that: The outer diameter of the circular spring (3) is smaller than the inner diameter of the inner cavity end of the outer covering layer (1).

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