阅读说明：本技术 一种复合汽缸盖密封垫 (Composite cylinder cover sealing gasket ) 是由 罗志强 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种复合汽缸盖密封垫,其包括密封垫垫体,密封垫垫体上成型有装配孔,所述装配孔具有不定形的外扩自由边界,所述外扩自由边界为密封垫垫体的支撑区,而与所述支撑区相对的密封垫垫体其他区域为密封区；密封垫垫体包括面层、底层以及中间层；面层上成型有带耐磨无机非金属材料膜层的预压盲槽；中间层包括芯板以及复合材料板,芯板对应设置于支撑区位置,而复合材料板对应设置于密封区位置,复合材料板的冷轧钢带的两侧表面均成型有波浪形的粗糙表面,并在粗糙表面上成型有由多层石墨烯与金云母纸交错叠合的复合纸层；所述芯板与所述复合材料板在边界位置成型有密封焊道。本发明结构紧凑,装配容易,并具有较佳的自封密封性能。(The invention discloses a composite cylinder cover sealing gasket, which comprises a sealing gasket pad body, wherein an assembly hole is formed in the sealing gasket pad body, the assembly hole is provided with an unshaped outward-expanding free boundary, the outward-expanding free boundary is a supporting area of the sealing gasket pad body, and other areas of the sealing gasket pad body opposite to the supporting area are sealing areas; the sealing gasket cushion body comprises a surface layer, a bottom layer and a middle layer; a prepressing blind groove with a wear-resistant inorganic non-metallic material film layer is formed on the surface layer; the middle layer comprises a core plate and a composite material plate, the core plate is correspondingly arranged at the position of the supporting area, the composite material plate is correspondingly arranged at the position of the sealing area, wave-shaped rough surfaces are formed on the two side surfaces of the cold-rolled steel strip of the composite material plate, and composite paper layers formed by overlapping a plurality of layers of graphene and phlogopite paper in a staggered manner are formed on the rough surfaces; and sealing welding beads are formed at the boundary positions of the core plate and the composite plate. The invention has compact structure, easy assembly and better self-sealing performance.)

1. A composite cylinder cover sealing gasket comprises a sealing gasket body and is characterized in that a plurality of assembling holes matched with a cylinder opening of a cylinder to be assembled are formed in the sealing gasket body, each assembling hole is provided with an unshaped outward-expanding free boundary, the outward-expanding free boundary is a supporting area of the sealing gasket body, and other areas of the sealing gasket body opposite to the supporting area are sealing areas;

the sealing gasket cushion body comprises a surface layer, a bottom layer and a middle layer formed between the surface layer and the bottom layer; a prepressing blind groove is formed in the surface layer in a corresponding sealing area, and a wear-resistant inorganic non-metallic material film layer is formed on the inner side surface of the prepressing blind groove; the middle layer comprises a core plate and a composite material plate, the core plate is formed by a cold-rolled steel strip with punched holes on two sides, the core plate is correspondingly arranged at a supporting area, the composite material plate is correspondingly arranged at a sealing area, a base material of the composite material plate is the cold-rolled steel strip, the thickness of the cold-rolled steel strip for forming the composite material plate is 30-50 mu m thinner than that of the cold-rolled steel strip for forming the core plate, wave rough surfaces are formed on the two side surfaces of the cold-rolled steel strip for forming the composite material plate, and composite paper layers formed by overlapping a plurality of graphene layers and phlogopite paper in a staggered mode are formed on the rough surfaces to fill the thickness difference of the cold-rolled steel strip;

and sealing welding beads are formed at the boundary positions of the core plate and the composite plate.

2. The composite cylinder head gasket of claim 1 wherein said flared free edge has a constant width at the outer edge of said mounting opening.

3. The composite cylinder head gasket according to claim 1, wherein the inorganic non-metallic film formed on the groove inner side surface of the pre-pressing blind groove is a nano-scale silicon oxide, aluminum oxide or titanium dioxide film.

4. The composite cylinder head gasket of claim 1 wherein said facing is disposed on a side of the gasket body that contacts the cylinder head.

5. The composite cylinder head gasket according to claim 1, wherein a sealant ring having an annular support plate is attached to the oil passage of the composite cylinder head gasket.

Technical Field

The invention relates to the technical field of automotive parts, in particular to a composite cylinder cover sealing gasket for sealing between a cylinder cover and a cylinder body.

Background

The cylinder cover sealing gasket is a sealing element which is arranged between the cylinder covers of the engine cylinder block and realizes the sealing function to fuel gas, cooling water and lubricating oil in respective functional areas after being screwed by bolts.

Among conventional cylinder head gaskets, there is a cylinder head gasket that seals between a cylinder head and a cylinder block by a self-sealing effect, and this cylinder head gasket is generally of a multi-layer assembly structure in which a plurality of seal plates are sandwiched between the cylinder head and the cylinder block having a cylinder bore, a protrusion that surrounds a fuel chamber hole and protrudes toward the cylinder head is formed in the seal plate on the cylinder head side, a protrusion that surrounds a combustion chamber hole and protrudes toward the cylinder block side is formed in the seal plate on the cylinder block side, and the two seal plates are overlapped so that the radial center portions of the protrusions are continuously in close contact with each other in the circumferential direction. The structure can realize the sealing of the fuel gas blown out from the cylinder to the outside under the pressure action, so as to improve the whole sealing performance of the cylinder cover sealing gasket and achieve the self-sealing effect by utilizing the pressure of the fuel gas.

In the prior art, the sealing plate in the cylinder head sealing gasket with the structure is mostly a fiber plate formed by fiber materials at one time, so that the whole process is simple, the manufacturing is convenient, and the production cost is low. With the increasing strengthening of internal combustion engines, the thermal load and mechanical load are increasing, the sealing performance of cylinder head gaskets is becoming more and more important, and the requirements for structures and materials are also becoming higher and higher, so that further improvements in structures and materials are required.

Disclosure of Invention

The technical problem underlying the present invention is to provide a composite cylinder head gasket which, as a static multilayer composite gasket, can be used to form a gas/liquid tight seal between two elements to be clamped, in order to solve the above-mentioned drawbacks of the background art.

The technical problem solved by the invention is realized by adopting the following technical scheme:

a composite cylinder cover sealing gasket comprises a sealing gasket body, wherein a plurality of assembling holes matched with a cylinder opening of a cylinder to be assembled are formed in the sealing gasket body, each assembling hole is provided with an unshaped outward-expanding free boundary, the outward-expanding free boundary is a supporting area of the sealing gasket body, and other areas of the sealing gasket body opposite to the supporting area are sealing areas;

the sealing gasket cushion body comprises a surface layer, a bottom layer and a middle layer formed between the surface layer and the bottom layer; a prepressing blind groove is formed in the surface layer in a corresponding sealing area, and a wear-resistant inorganic non-metallic material film layer is formed on the inner side surface of the prepressing blind groove; the middle layer comprises a core plate and a composite material plate, the core plate is formed by a cold-rolled steel strip with punched holes on two sides, the core plate is correspondingly arranged at a supporting area, the composite material plate is correspondingly arranged at a sealing area, a base material of the composite material plate is the cold-rolled steel strip, the thickness of the cold-rolled steel strip for forming the composite material plate is 30-50 mu m thinner than that of the cold-rolled steel strip for forming the core plate, wave rough surfaces are formed on the two side surfaces of the cold-rolled steel strip for forming the composite material plate, and composite paper layers formed by overlapping a plurality of graphene layers and phlogopite paper in a staggered mode are formed on the rough surfaces to fill the thickness difference of the cold-rolled steel strip;

and sealing welding beads are formed at the boundary positions of the core plate and the composite plate.

By way of further limitation, the flared free edge has a constant width at an outer edge of the assembly aperture.

And as a further limitation, the inorganic non-metallic material film layer formed on the inner side surface of the prepressing blind groove is a nano-scale silicon oxide, aluminum oxide or titanium dioxide film layer.

As a further limitation, the facing layer is disposed on a side surface of the gasket body contacting the cylinder head.

By way of further limitation, a sealing rubber ring with an annular supporting plate can be mounted at the oil through hole of the composite cylinder cover sealing gasket to assist sealing.

Has the advantages that: the composite cylinder cover sealing gasket has a compact structure, can improve the sealing performance of the cylinder cover sealing gasket, can effectively improve the bending strength of the cylinder cover sealing gasket, reduces the stress area of a cylinder cover gasket body part after an assembling machine, can effectively prolong the service life of the cylinder cover sealing gasket, improves the self-sealing effect through the combination of the core plate and the composite material plate, further improves the sealing effect of the cylinder cover sealing gasket, and also improves the sealing durability to a certain extent.

Drawings

FIG. 1 is a schematic diagram of a preferred embodiment of the present invention.

FIG. 2 is a cross-sectional detail view of the preferred embodiment of the present invention.

Wherein: 1. an assembly hole; 2. a support region; 3. a sealing zone; 4. a surface layer; 5. a core board; 6. sealing the welding bead; 7. prepressing the blind groove; 8. a wear-resistant inorganic non-metallic material film layer; 9. a composite sheet; 10. a bottom layer.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings, but the present invention may be embodied in many different forms and is not limited to the embodiments described herein, but rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "inside", "outside" and the like refer only to the positional relationship between the inside and outside of the cabinet of the corresponding cabinet body assembled by the panels in fig. 1, and are for illustrative purposes only and do not refer to the only embodiment.

Referring to fig. 1 and 2, in the present embodiment, a gasket body of the composite cylinder head gasket includes a surface layer 4, a middle layer and a bottom layer 10, both the surface layer 4 and the bottom layer 10 are graphite layers, a pre-pressing blind groove 7 is formed on the surface of the surface layer 4, the surface layer 4 with the pre-pressing blind groove 7 is disposed on a side surface of the gasket body contacting with the cylinder head, and in order to improve the surface layer contact performance of the surface layer 4, a wear-resistant inorganic non-metallic material film layer is formed on the inner surface of the pre-pressing blind groove 7.

Like other composite cylinder head gaskets on the market, the gasket body of the embodiment is also provided with a plurality of assembly holes 1 matched with the cylinder ports of cylinders to be assembled, each assembly hole 1 is provided with an unshaped outward-expanding free boundary, the outward-expanding free boundaries have constant width at the outer edges of the assembly holes 1, and the outward-expanding free boundaries and the convex parts of the outer edges of the gasket body jointly form a supporting area 2 of the gasket body, namely a filling area shown in fig. 1; and the other region on the gasket body except for the region of the fitting hole 1 and the support region is a sealing region 3.

In the embodiment, the middle layer of the gasket body is arranged between the surface layer 4 and the bottom layer 10 and comprises a core plate 5 and a composite material plate 9, wherein the core plate 5 is formed by a first cold-rolled steel strip with punching holes on two surfaces and is correspondingly arranged in the corresponding area of the supporting area 2, and the upper surface and the lower surface of the outer edge of the core plate 5 are alternately provided with retention teeth for embedding and fixing between the surface layer 4 and the bottom layer 10; the composite material plate comprises a second cold-rolled steel strip as a base material, the thickness of the second cold-rolled steel strip is 40 mu m thinner than that of the first cold-rolled steel strip formed into the core plate 5, wave-shaped rough surfaces are formed on the surfaces of two sides of the second cold-rolled steel strip, and a composite paper layer is formed on the surfaces of the wave-shaped rough surfaces; in this example, the composite paper layer was laminated in the form of graphene-mica paper-graphene-mica paper … …, then press-formed, and directly formed on the wavy rough surface of the second cold-rolled steel strip to fill the thickness difference with the first cold-rolled steel strip.

In this embodiment, the core plate 5 and the composite material plate 9 are formed with sealing beads 6 at their boundary positions, and a sealing rubber ring with an annular support plate may be mounted at the oil through hole of the gasket of the composite cylinder head to assist sealing.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.