CN217538869U

CN217538869U - Static sealing element for diesel engine

Info

Publication number: CN217538869U
Application number: CN202221907472.1U
Authority: CN
Inventors: 庞明磊; 杜明欣; 景玉龙; 张志刚; 杨敬亭; 宫志欣; 刘坤
Original assignee: Shandong Non Metallic Material Research Institute
Current assignee: Shandong Non Metallic Material Research Institute
Priority date: 2022-07-21
Filing date: 2022-07-21
Publication date: 2022-10-04
Anticipated expiration: 2032-07-21

Abstract

The utility model discloses a static sealing element for a diesel engine, the section of the static sealing element is of a star-shaped structure, the periphery of the static sealing element is composed of four circular convex structures and four circular groove structures which are alternately arranged, and the radius of the convex structures is 0.67-0.75 times of that of the groove structures; under the working state, the compressibility is 10% -30%. The utility model has the advantages of resistant extrudability is good, sealing reliability is high, long service life, is applicable to the static seal of position vibration operating mode conditions such as diesel engine cylinder cap.

Description

Static sealing element for diesel engine

Technical Field

This patent belongs to sealed technical field, especially a static seal spare for diesel engine.

Background

The static sealing element for the diesel engine bears alternating mechanical load and thermal load, the working condition is harsh, the failure of the static sealing element can cause the problems of air leakage, water leakage, oil leakage and the like, the fault phenomena of 'leakage, overflow, dripping and leakage' and the like occur occasionally in the use process of the diesel engine, most of the fault phenomena are caused by the failure of the static sealing element of the diesel engine, and the static sealing element needs to adapt to the working conditions of high and low temperature, high pressure, vibration and the like.

The cross section of the rubber static sealing element for the engine is generally round or rectangular, the special-shaped piece at the joint surface part of the cylinder cover is of an O-shaped structure at present, and the special-shaped piece has the damage phenomena of extrusion and the like in the using process, particularly in the vibration working condition, and has poor sealing reliability.

Disclosure of Invention

The invention provides a static sealing element for a diesel engine, which is suitable for the working condition of a vibration environment.

The invention aims to realize that the section structure is designed to be star-shaped and is arranged in a groove of a sealed part, static sealing of parts such as a cylinder cover and the like in a vibration state is realized by using double-lip sealing of a star-shaped structure, extrusion resistance is realized, and double-lip structure is used for forming double sealing to improve the sealing effect.

The utility model relates to a static sealing element for a diesel engine, which has a star-shaped section and an outer periphery consisting of four convex structures and four groove structures which are alternately arranged; the convex structure and the groove structure are circular, and the radius of the convex structure is 0.67-0.75 time of that of the groove structure; under the working state, the compressibility is 10% -30%.

Preferably, the radius of the convex structure is 0.35-1.2 mm, and the radius of the concave structure is 0.5-1.6 mm.

Preferably, the static sealing element is made of special rubber materials with wide temperature range and medium resistance.

Preferably, the static sealing element is round or square, and the included angle of the square static sealing element is rounded or chamfered by 45 degrees.

The utility model relates to a static sealing member for diesel engine, resistant extrudability is good, and sealing reliability is high, and long service life is applicable to the static seal of position vibration operating mode conditions such as diesel engine cylinder cap.

Drawings

FIG. 1 is a cross-sectional view of a static seal for a star diesel engine;

FIG. 2 is a schematic structural view of a static seal for a diesel engine with circular arc corners;

FIG. 3 is a schematic structural view of a static seal for a chamfered corner diesel engine.

Wherein, the structure comprises a 1-convex structure and a 2-concave structure.

Detailed Description

The following description will take the static seal of a typical diesel engine as an example, and the present invention will be further described with reference to the specific embodiments, but the present invention is not limited thereto.

Example one

The static sealing element for the diesel engine of the embodiment is circular, has an inner diameter of 40mm, and is made of special fluororubber.

The cross section of the groove structure is in a star-shaped structure, and the periphery of the groove structure is composed of four convex structures 1 and four groove structures 2 which are alternately arranged, as shown in figure 1. The cross-sectional width and height of the static seal are 1.8mm. The convex structure 1 is circular and has a radius R0.35mm. The groove structure 2 is circular with a radius R0.5mm.

After the static seal of the embodiment is installed in a diesel engine, the compression ratio of the static environment is 20%, and the maximum compression ratio of the working environment is 30%. After the test examination for 500 hours of continuous work, no leakage exists.

Example two

The static seal for the diesel engine of the embodiment is a rectangle with the size of 210mm multiplied by 75mm, the included angle is chamfered with a fillet with the radius of 22mm, and the static seal is made of special fluororubber, as shown in figure 2.

The cross section of the groove structure is of a star-shaped structure, and the periphery of the groove structure is composed of four convex structures 1 and four groove structures 2 which are alternately arranged. The width and the height of the section of the sealing element are 5.3mm, the protruding structure 1 is R1.0mm, and the groove structure 2 is R1.5mm.

After the static seal of the embodiment is installed in a diesel engine, the compression ratio of the static environment is 12%, and the maximum compression ratio of the working environment is 21%. The test and the examination are carried out for 500 hours in a continuous working way without leakage.

EXAMPLE III

The static sealing element for the diesel engine of the embodiment is a rectangle with the thickness of 210mm multiplied by 110mm, the included angle is chamfered with the thickness of 8 multiplied by 45 degrees, and the static sealing element is made of special hydrogenated nitrile rubber and is shown in figure 3.

The cross section of the groove structure is of a star-shaped structure, and the periphery of the groove structure is composed of four convex structures 1 and four groove structures 2 which are alternately arranged. The width and the height of the cross section of the sealing element are 5.7mm, the bulge structure 1 is R1.2mm, and the groove structure 2 is R1.6mm.

After the static seal of the embodiment is installed in a diesel engine, the compression ratio of the static environment is 10%, and the maximum compression ratio of the working environment is 18%. After the test examination for 500 hours of continuous work, no leakage exists.

Claims

1. A static seal for a diesel engine, characterized in that: the section of the material is of a star-shaped structure, and the periphery of the material consists of four convex structures (1) and four groove structures (2) which are alternately arranged; the convex structure (1) and the groove structure (2) are circular, and the radius of the convex structure (1) is 0.67-0.75 time of that of the groove structure (2).

2. The static seal for a diesel engine according to claim 1, wherein: under the working state, the compression ratio is 10-30%.

3. The static seal for a diesel engine according to claim 1, wherein: the radius of the convex structure (1) is 0.35-1.2 mm, and the radius of the groove structure (2) is 0.5-1.6 mm.

4. The static seal for a diesel engine according to claim 1, wherein: the static sealing element is made of special rubber materials with wide temperature range and medium resistance.

5. The static seal for a diesel engine according to any one of claims 1 to 4, wherein: the static sealing element is round or square.

6. The static seal for a diesel engine according to claim 5, wherein: and the included angle of the square static sealing element is rounded.

7. The static seal for a diesel engine according to claim 5, wherein: and the included angle of the square static sealing element is inverted by 45 degrees.