Search

CN-224214266-U - Multi-layer metal sealing gasket for cylinder cover of diesel engine

CN224214266UCN 224214266 UCN224214266 UCN 224214266UCN-224214266-U

Abstract

The invention discloses a multi-layer metal sealing gasket for a diesel engine cylinder cover, which relates to the technical field of sealing gaskets and comprises a gasket body, wherein a plurality of cylinder holes are formed in the gasket body, a first sealing component for sealing the outermost side of the cylinder holes is arranged on the gasket body, and a second sealing component for improving the overall sealing effect and a dynamic sealing component for self-adaptive sealing are arranged in the gasket body. According to the invention, the first sealing component makes oil at the position of the cylinder hole difficult to flow out of the cylinder, the second sealing component can compensate the condition of uneven integral deformation of the gasket body through local plastic deformation under a high-temperature environment, the high temperature can trigger the sealing effect of the gasket to a greater extent, the dynamic sealing component can generate greater non-plastic deformation due to the expansion rate of the internal material under the high-temperature condition, the inside of the gasket body is actively compressed, and the gasket body is dynamically sealed along with the working temperature of the gasket body, so that the sealing performance of the gasket body is better.

Inventors

  • HU LAIBIN
  • PANG ZHENJUN
  • MA BAODONG

Assignees

  • 山东奥铃动力有限公司

Dates

Publication Date
20260508
Application Date
20250716

Claims (7)

  1. 1. The multi-layer metal sealing gasket for the diesel engine cylinder cover comprises a gasket body (1) and is characterized by further comprising a plurality of cylinder holes (11) formed in the gasket body (1), wherein a first sealing component used for sealing the outermost side of the cylinder holes (11) is arranged on the gasket body (1), and a second sealing component used for improving the overall sealing effect and a dynamic sealing component used for self-adaptive sealing are arranged in the gasket body (1).
  2. 2. A multi-layered metal gasket for a cylinder head of a diesel engine according to claim 1, characterized in that said first sealing assembly comprises a plurality of sealing rings (2), a plurality of said sealing rings (2) being fixedly arranged inside a plurality of cylinder bores (11), respectively.
  3. 3. The multi-layer metal sealing gasket for the cylinder head of the diesel engine according to claim 1, wherein the second sealing assembly comprises a pair of martensitic steel plates (3) and a plurality of sealing ribs (31), the plurality of sealing ribs (31) are fixedly arranged on two sides of the pair of martensitic steel plates (3) respectively, and the plurality of sealing ribs (31) are in one-to-one correspondence with the plurality of cylinder holes (11) respectively.
  4. 4. A multi-layer metal sealing gasket for a cylinder head of a diesel engine according to claim 3, wherein the dynamic sealing assembly comprises a flexible graphite plate (4), a plurality of circular grooves (41) and fluororubber (42), the flexible graphite plate (4) is fixedly arranged between a pair of martensitic steel plates (3), the plurality of circular grooves (41) are respectively formed on two sides of the flexible graphite plate (4), the plurality of circular grooves (41) are respectively in one-to-one correspondence with the plurality of cylinder holes (11), and the fluororubber (42) is respectively coated in the plurality of circular grooves (41).
  5. 5. A multi-layered metal gasket for a cylinder head of a diesel engine according to claim 3, wherein the gasket body (1) further comprises a pair of austenitic steel plates (5), the pair of austenitic steel plates (5) being fixedly arranged outside the pair of martensitic steel plates (3), respectively.
  6. 6. A multi-layered metal gasket for a cylinder head of a diesel engine according to claim 5, characterized in that the austenitic steel plate (5) has a thickness smaller than the martensitic steel plate (3).
  7. 7. The multi-layer metal sealing gasket for the cylinder head of the diesel engine according to claim 1, wherein a plurality of positioning holes (6) are formed in the gasket body (1).

Description

Multi-layer metal sealing gasket for cylinder cover of diesel engine Technical Field The utility model relates to the technical field of sealing gaskets, in particular to a multi-layer metal sealing gasket for a diesel engine cylinder cover. Background The metal sealing gasket of the cylinder cover of the diesel engine is a key sealing element in the diesel engine, and has the core functions of preventing leakage of high-temperature and high-pressure fuel gas, lubricating oil and cooling water and ensuring high-efficiency and stable operation of the engine. The good sealing can reduce the ablation of fuel gas to the cylinder gasket, and avoid local overheating and mechanical abrasion caused by leakage, thereby reducing maintenance frequency and improving the reliability of the engine. The traditional cylinder gasket is formed by compounding two metal gaskets by clamping an asbestos plate or two layers of asbestos plates by clamping a metal sprint plate, and the gasket has poor tightness, is easy to damage under a high-temperature working condition, has short service life and is difficult to meet the use requirement. Disclosure of Invention The invention aims to solve the problem of poor sealing performance and provides a multi-layer metal sealing gasket for a diesel engine cylinder cover. In order to achieve the above purpose, the present invention adopts the following technical scheme: The multi-layer metal sealing gasket for the diesel engine cylinder cover comprises a gasket body, and further comprises a plurality of cylinder holes formed in the gasket body, wherein a first sealing assembly used for sealing the outermost side of the cylinder holes is arranged on the gasket body, and a second sealing assembly used for improving the overall sealing effect and a dynamic sealing assembly used for self-adaptive sealing are arranged in the gasket body. As a further description of the above technical solution, the first sealing assembly includes a plurality of sealing rings, and the plurality of sealing rings are fixedly disposed inside the plurality of cylinder bores, respectively. As further description of the technical scheme, the second sealing assembly comprises a pair of martensitic steel plates and a plurality of sealing ribs, the sealing ribs are respectively and fixedly arranged on two sides of the pair of martensitic steel plates, and the sealing ribs are respectively in one-to-one correspondence with the cylinder holes. As further description of the technical scheme, the dynamic sealing assembly comprises a flexible graphite plate, a plurality of circular grooves and fluororubber, wherein the flexible graphite plate is fixedly arranged between a pair of martensitic steel plates, the circular grooves are respectively formed in two sides of the flexible graphite plate, the circular grooves are respectively in one-to-one correspondence with the cylinder holes, and the fluororubber is respectively coated in the circular grooves. As a further description of the above aspects, the gasket body further includes a pair of austenitic steel plates fixedly disposed outside the pair of martensitic steel plates, respectively. As a further description of the above technical solution, the austenitic steel sheet has a thickness smaller than that of the martensitic steel sheet. As further description of the technical scheme, the gasket body is provided with a plurality of positioning holes. In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows: 1. The first sealing component makes oil at the cylinder hole difficult to flow out of the cylinder, the second sealing component can compensate the condition of uneven integral deformation of the gasket body through local plastic deformation under the high-temperature environment, the high temperature can trigger the sealing effect of the gasket to a greater extent, the expansion rate of the inner material of the dynamic sealing component can cause the inner material to generate greater degree of non-plastic deformation under the high-temperature condition, the inner part of the gasket body is actively compressed, and the gasket body is dynamically sealed along with the working temperature of the gasket body, so that the sealing performance of the gasket body is better; 2. The expansion amount of the flexible graphite plate at high temperature is far better than that of metal, the structural stability in the gasket is ensured, the hardness of the austenitic steel plate is far smaller than that of the martensitic steel plate, the austenitic steel plate at the outermost side under the high-temperature working condition is preferentially deformed and disperses stress, the martensitic steel plate used for bearing the rigidity of the gasket body is prevented from being broken too early, and the high temperature resistance of the gasket body is ensured. Drawings Fig. 1 shows a schematic diagram of a front view structure provi