Gasket structure for cylinder cover of high-horsepower diesel engine

Abstract

The utility model discloses a cylinder cover gasket structure for a high-horsepower diesel engine, which comprises a cylinder cover gasket body, a plurality of groups of throttling holes are arranged on the cylinder cover gasket body, and printing lines are arranged on the surface of the cylinder cover gasket body. The printing lines form a tiny concave-convex structure on the surface of the gasket through the specific grain design, on one hand, self-adaptive adjustment can be achieved along with deformation generated by a cylinder cover and a cylinder body due to temperature change when an engine runs, micro holes between the cylinder cover and the cylinder body are tightly filled, and the sealing performance is optimized; on the other hand, the lines can guide the cylinder cover bolt tightening pressure to be evenly distributed, and local stress concentration is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of high-horsepower diesel engine manufacturing technology. Specifically, this utility model relates to a cylinder head gasket structure for high-horsepower diesel engines. Background Technology

[0002] Engine cylinder head gasket (also known as cylinder head gasket) is a key sealing element located between the cylinder block and the cylinder head. Its core function is to fill the microscopic unevenness between the two and ensure the sealing performance of the engine under high temperature and high pressure. Depending on the material, cylinder head gaskets can be divided into various types such as metal-asbestos gaskets, metal-composite material gaskets, and all-metal gaskets.

[0003] However, most existing cylinder head gaskets are flat, and there is no sealing structure at the gap between the cylinder and the cylinder head, which makes it easy for gas and water in the cylinder to leak out through the gap, resulting in poor sealing. Utility Model Content

[0004] This invention provides a cylinder head gasket structure for high-horsepower diesel engines, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a cylinder head gasket structure for a high-horsepower diesel engine, comprising a cylinder head gasket body, wherein the cylinder head gasket body is provided with a plurality of throttling holes and printed lines are provided on its surface.

[0006] Preferably, some of the throttling orifices are configured with a tapered structure, and the printed lines are configured with a wavy or grid-like pattern.

[0007] Preferably, the cylinder head gasket body is further provided with a rubber ring and a rubber ring skeleton, the rubber ring is made of fluororubber, and the thickness of the rubber ring skeleton is 0.35mm.

[0008] Preferably, the cylinder head gasket body includes a reinforcing plate, a heat insulation ring, plate a, plate b, plate c, and plate d.

[0009] Preferably, the thickness of the reinforcing plate is set to 0.03 mm, and the thickness of the heat insulation ring is set to 1.3 mm.

[0010] The beneficial effects of adopting the above technical solutions are:

[0011] 1. The printing lines form a tiny uneven structure on the gasket surface through a specific texture design. On the one hand, it can adaptively adjust to the deformation of the cylinder head and cylinder block caused by temperature changes during engine operation, tightly filling the micro-pores between them and optimizing the sealing performance. On the other hand, the texture can guide the cylinder head bolt tightening pressure to be evenly distributed, avoiding local stress concentration.

[0012] Second, the printing line uses materials such as metal composite materials or fluororubber layers to precisely cover key areas through the printing process, enhancing pressure resistance, corrosion resistance and high temperature resistance.

[0013] 3. The water throttle orifice is used to regulate the flow cross-sectional area of ​​the coolant between the cylinder head and the cylinder block, precisely control the flow rate and pressure of the coolant, ensure uniform cooling of all parts of the engine, avoid local overheating that could lead to cylinder head gasket burnout, and prevent excessive coolant pressure from causing leakage or damaging the gasket sealing layer. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a partial sectional view of the structure of this utility model;

[0016] Figure 3 This is a partial sectional view of the structure of this utility model;

[0017] in:

[0018] 1. Cylinder head gasket body; 1-1. Throttling orifice; 1-2. Printing line; 1-3. Rubber ring; 1-4. Rubber ring skeleton; 1-5. Reinforcing plate; 1-6. Heat insulation ring; 1-7. Plate a; 1-8. Plate b; 1-9. Plate c; 1-10. Plate d. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of this utility model, and to facilitate its implementation.

[0020] Specifically, such as Figures 1 to 3 As shown, a cylinder head gasket structure for a high-horsepower diesel engine includes a cylinder head gasket body 1, on which a plurality of throttle holes 1-1 are formed and printed lines 1-2 are provided on the surface.

[0021] It should be noted that the water throttling orifice 1-1 (or coolant throttling orifice) on the cylinder head gasket is a key design specifically for regulating coolant flow, and its function is closely related to engine thermal management and sealing performance. The printed lines 1-2 (usually referred to as coatings or textures) on the surface of the cylinder head gasket have multiple functions in engine sealing. Their design is based on the special requirements of cylinder gaskets in high temperature, high pressure and corrosive environments. Some printed coatings use metal composite materials (such as aluminum, copper) or fluororubber layers, and the printing process precisely covers key areas to enhance pressure resistance and reduce the risk of seal failure.

[0022] The shape of the throttling orifice 1-1 is set as a tapered structure, and the printed lines 1-2 are set as wavy or grid-like patterns.

[0023] It should be noted that the printed lines form a tiny uneven structure on the gasket surface through a specific texture design. On the one hand, it can adaptively adjust to the deformation of the cylinder head and cylinder block caused by temperature changes during engine operation, tightly filling the micro-pores between them and optimizing the sealing performance. On the other hand, the texture can guide the cylinder head bolt tightening pressure to be evenly distributed, avoiding local stress concentration.

[0024] In addition, the water throttle orifice is used to regulate the flow cross-sectional area of ​​the coolant between the cylinder head and the cylinder block, precisely control the flow rate and pressure of the coolant, ensure uniform cooling of all parts of the engine, avoid local overheating that could lead to cylinder head gasket burnout, and prevent excessive coolant pressure from causing leakage or damaging the gasket sealing layer.

[0025] The cylinder head gasket body 1 is also provided with a rubber ring 1-3 and a rubber ring skeleton 1-4. The material of the rubber ring 1-3 is fluororubber, and the thickness of the rubber ring skeleton 1-4 is 0.35mm.

[0026] It should be noted that the rubber ring is made of fluororubber, the rubber ring skeleton is 0.35mm thick, and the material is 10Cr17.

[0027] The cylinder head gasket body 1 includes reinforcing plates 1-5, heat insulation rings 1-6, plates a1-7, b1-8, c1-9, and d1-10.

[0028] The thickness of the reinforcing plate 1-5 is set to 0.03mm, and the thickness of the heat insulation ring 1-6 is set to 1.3mm.

[0029] It should be noted that reinforcing plates 1-5 are 0.03mm thick and made of 06Cr19Ni10 material; plates a1-7 (same as 1-8 / 1-10) are 0.3mm thick and made of 06Cr19Ni10 material; plates c1-9 are 0.3mm thick and made of tin-plated thin steel plate; and heat insulation rings 1-6 are 1.3mm thick and made of ST12 material, which require rust prevention treatment.

[0030] The specific working method is described below using specific embodiments: Example 1

[0031] The water throttling orifice 1-1 has the following characteristics:

[0032] 1. Coolant flow and pressure regulation

[0033] Function: The water throttle orifice 1-1 precisely controls the flow and pressure of coolant by limiting the cross-sectional area of ​​coolant flow between the cylinder head and cylinder block, ensuring uniform cooling of all engine parts (such as the combustion chamber and spark plug seats); preventing localized overheating (such as the cylinder head nose area) that could lead to cylinder head gasket burnout. It also prevents excessive coolant pressure from causing leaks or damaging the gasket sealing layer.

[0034] 2. Thermal balance and cavitation prevention

[0035] Synergistic cooling system: The throttle orifice 1-1 works in conjunction with the engine's main water passage to balance the temperature difference between the cylinder head and the cylinder block, reduce thermal stress deformation, and thus protect the gasket's sealing performance.

[0036] Anti-cavitation design: Some throttling orifices 1-1 use special shapes (such as tapered structures) to reduce sudden changes in coolant flow rate and avoid the generation of bubbles (cavitation phenomenon) that corrode the metal surface.

[0037] The water throttle orifice 1-1 is the "valve" of the cooling system on the cylinder head gasket, which directly affects the engine's heat dissipation efficiency, sealing reliability, and lifespan. Its design must take into account both fluid dynamics and material heat resistance, and maintenance must strictly follow the original factory specifications. If an abnormal cooling is found, it is recommended to first check the condition of the throttle orifice, and if necessary, replace it with a high-quality metal gasket (such as a steel gasket with elastic ridges) to improve the sealing performance. Example 2

[0038] The water throttling orifice 1-1 has the following characteristics:

[0039] 1. Optimize sealing performance

[0040] Printed lines 1-2 form a tiny uneven structure on the gasket surface through a specific texture design (such as wavy or grid-like patterns). This structure can more tightly fill the microscopic pores between the cylinder block and cylinder head. Especially during high-temperature expansion or mechanical vibration, the texture can adjust with deformation to maintain the fit of the sealing surface and prevent gas or liquid leakage. Some printed coatings use metal composite materials (such as aluminum or copper) or fluororubber layers to precisely cover key areas through the printing process, enhancing pressure resistance and reducing the risk of seal failure.

[0041] 2. Homogenization of pressure distribution

[0042] When the engine is running, the tightening pressure of the cylinder head bolts needs to be evenly distributed on the surface of the gasket to avoid local stress concentration that could lead to deformation or damage. The texture design of the printed lines 1-2 can guide the pressure distribution and balance the contact pressure between the cylinder head and the cylinder block, thereby improving the stability of the overall structure.

[0043] 3. Enhanced corrosion resistance and high-temperature resistance

[0044] The coating materials (such as fluororubber and silicone rubber) in printing lines 1-2 have excellent heat resistance and resistance to media corrosion, and can resist the erosion of engine oil, coolant and combustion gases; for example, fluororubber coatings can still maintain elasticity at high temperatures, reducing seal failure caused by permanent compression deformation.

[0045] 4. Compensating for surface roughness and deformation

[0046] The thermal expansion and contraction during engine operation may cause slight deformation at the mating surface between the cylinder head and the cylinder block; the elastic structure of the printing line 1-2 can adapt to surface roughness or slight deformation, ensuring sealing reliability during long-term use; the cylinder head gasket printing line 1-2, through the combination of material and structural design, achieves a comprehensive improvement in sealing performance, pressure adaptability and durability, and is one of the key technologies for efficient engine operation.

[0047] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A cylinder head gasket structure for a high-horsepower diesel engine, characterized in that, It includes a cylinder head gasket body (1), on which a plurality of throttling holes (1-1) are opened, and printed lines (1-2) are provided on the surface.

2. The cylinder head gasket structure for a high-horsepower diesel engine according to claim 1, characterized in that: The shape of some of the throttling orifices (1-1) is set as a tapered structure, and the printed lines (1-2) are set as wavy or grid-like patterns.

3. The cylinder head gasket structure for a high-horsepower diesel engine according to claim 1, characterized in that, The cylinder head gasket body (1) is also provided with a rubber ring (1-3) and a rubber ring skeleton (1-4). The material of the rubber ring (1-3) is fluororubber, and the thickness of the rubber ring skeleton (1-4) is 0.35mm.

4. The cylinder head gasket structure for a high-horsepower diesel engine according to claim 1, characterized in that: The cylinder head gasket body (1) includes a reinforcing plate (1-5), a heat insulation ring (1-6), plate a (1-7), plate b (1-8), plate c (1-9), and plate d (1-10).

5. A cylinder head gasket structure for a high-horsepower diesel engine according to claim 4, characterized in that: The thickness of the reinforcing plate (1-5) is set to 0.03 mm, and the thickness of the heat insulation ring (1-6) is set to 1.3 mm.

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