CN216554055U

CN216554055U - Diesel engine cylinder head cover assembly

Info

Publication number: CN216554055U
Application number: CN202220128191.XU
Authority: CN
Inventors: 敖红专; 肖连峰
Original assignee: Jiangxi Isuzu Engine Co ltd
Current assignee: Jiangxi Isuzu Engine Co ltd
Priority date: 2022-01-18
Filing date: 2022-01-18
Publication date: 2022-05-17
Anticipated expiration: 2032-01-18

Abstract

A diesel engine cylinder head cover assembly belongs to the technical field of diesel engines and comprises a cylinder head cover body which is covered, a diaphragm valve is mounted on the cylinder head cover body and fixed to the top of the upper portion of the cylinder head cover body, the diaphragm valve is communicated with the outside through an air outlet pipe, a U-shaped channel is further arranged inside the cylinder head cover body, and labyrinth partition plates are uniformly arranged in the U-shaped channel; oil-gas separation board and U type passageway lower terminal surface form a U type cavity, oil-gas separation board is equipped with the oil gas air inlet in this U type cavity inside, be equipped with a plurality of baffles on the inboard oil-gas separation board of U type cavity, thick separator plate and smart separator plate, the inside filter screen that is equipped with of smart separator plate, oil-gas separation board is equipped with four back oil pipes in the outside of this U type cavity, through U type cavity, labyrinth baffle, the baffle, thick separator plate, smart separator plate and filter screen, can make the machine oil granule in the crankcase carry out the multiple-layer filtering separation, by a wide margin the machine oil in the oil gas in the crankcase has been reduced, thereby the machine oil consumption of engine has been reduced.

Description

Diesel engine cylinder head cover assembly

Technical Field

The utility model relates to the technical field of diesel engines, in particular to a cylinder head cover assembly of a diesel engine.

Background

During combustion work of the engine, a large amount of high-temperature and high-pressure gas can be generated in a combustion chamber, the high-temperature gas can be fleed into a crankcase from a gap of a piston ring, and the fleed gas contains a large amount of engine oil;

at present, in the prior art, an oil-gas separator is externally arranged on a cylinder cover, and separated gas is introduced into an engine for air intake combustion, but the separation efficiency of the general externally arranged oil-gas separator is not high, so that the oil consumption of the engine is increased, the occupied space for arrangement is large, the reliability is not high, and the oil leakage fault of the oil-gas separator is easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a cylinder head cover assembly of a diesel engine.

In order to achieve the purpose, the utility model adopts the following technical scheme: a diesel engine cylinder head cover assembly comprises a cylinder head cover body which is covered, a diaphragm valve is mounted on the cylinder head cover body, the diaphragm valve is fixed at the top of the upper part of one side of the cylinder head cover body, the diaphragm valve is communicated with the outside through an air outlet pipe, the air outlet pipe penetrates from the inner side to the outer side of the cylinder head cover body, a U-shaped channel is further arranged inside the cylinder head cover body, and a labyrinth partition plate is uniformly arranged in the U-shaped channel;

the diesel engine cylinder head cover assembly still includes the oil-gas separation board, the oil-gas separation board passes through the riveting to be fixed terminal surface under the U type passageway of cylinder head cover body, and the two forms a U type cavity, the oil-gas separation board is equipped with the oil gas air inlet in the inside one side of this U type cavity, the diaphragm valve is located this U type cavity and keeps away from oil gas air inlet one side upper portion, and perpendicular upwards is equipped with a plurality of baffles, coarse separation board and smart separation board on the inboard oil-gas separation board of this U type cavity, the inside filter screen that is equipped with of smart separation board, the oil-gas separation board is perpendicular to having four oil return pipes downwards in the outside of this U type cavity.

As a further scheme of the utility model: the four oil return pipes are uniformly arranged in front of and behind the partition plate, the coarse separation plate and the fine separation plate, and are of a U-shaped pipe structure.

As a further scheme of the utility model: the oil-gas separation device is characterized in that the coarse separation plate and the fine separation plate are welded in a shape like a Chinese character 'ji' on the oil-gas separation plate, a plurality of through holes are uniformly formed in the oil-gas inlet side section and the upper side end face of the coarse separation plate and the fine separation plate, and the opposite sides of the coarse separation plate and the fine separation plate are solid surfaces.

As a further scheme of the utility model: and a gap is formed between the partition plate and the upper part of the cavity in the cylinder head cover body.

As a further scheme of the utility model: the inside filter screen that is equipped with of fine separator, the filter screen is formed for the compression of multilayer wire, and the material adopts SUS304 stainless steel, and the line footpath phi 0.2 mm.

As a further scheme of the utility model: and sealant is coated between the oil-gas separation plate and the cylinder head cover body.

In conclusion, the utility model has the following beneficial effects:

1. according to the utility model, the labyrinth partition plate, the coarse separation plate, the fine separation plate and the filter screen are arranged in the U-shaped cavity, so that engine oil particles in oil gas in the crankcase can be subjected to multi-layer filtering separation, the separation effect in the whole process is good, the separation efficiency is high, the engine oil in the oil gas in the crankcase is greatly reduced, and the engine oil consumption of an engine is reduced.

2. The oil-gas separator has an internal integrated oil-gas separation function, an oil-gas separator does not need to be independently installed outside the cylinder head cover, the risk of failure caused by oil leakage of the oil-gas separator is avoided, the reliability is good, in addition, the assembly efficiency of an engine is effectively improved, and the arrangement space of the whole engine is saved.

Drawings

FIG. 1 is an exploded view of a cylinder head cover assembly of the present invention;

FIG. 2 is a view of the body profile of the cylinder head cover of the present invention;

FIG. 3 is a view of the oil-gas separation plate of the present invention;

FIG. 4 is a schematic view of oil-gas separation according to the present invention.

In the figure: 1. a cylinder head cover body; 11. a labyrinth plate; 2. an oil-gas separation plate; 21. an oil gas inlet; 22. a partition plate; 23. a coarse separation plate; 24. a fine separation plate; 25. filtering with a screen; 26. an oil return pipe; 3. a diaphragm valve; 4. and an air outlet pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides the following technical scheme: as shown in fig. 1-4, a cylinder head cover assembly of a diesel engine comprises a cylinder head cover body 1 which is covered, a diaphragm valve 3 is installed on the cylinder head cover body 1, the diaphragm valve 3 is fixed on the top of one side of the cylinder head cover body 1, the diaphragm valve 3 is communicated with the outside through an air outlet pipe 4, the air outlet pipe 4 penetrates from the inner side to the outer side of the cylinder head cover body 1, a U-shaped channel is further arranged inside the cylinder head cover body 1, and a labyrinth partition 11 is uniformly arranged in the U-shaped channel; the oil-gas separation device further comprises an oil-gas separation plate 2, the oil-gas separation plate 2 is fixed on the lower end face of a U-shaped channel of the cylinder head cover body 1 through riveting, the oil-gas separation plate and the oil-gas inlet 21 form a U-shaped cavity, an oil-gas inlet 21 is formed in one side of the inside of the U-shaped cavity of the oil-gas separation plate 2, the diaphragm valve 3 is located on the upper portion of one side, away from the oil-gas inlet 21, of the U-shaped cavity, a plurality of partition plates 22, a coarse separation plate 23 and a fine separation plate 24 are vertically and upwards arranged on the oil-gas separation plate 2 on the inner side of the U-shaped cavity, a filter screen 25 is arranged in the fine separation plate 24, the filter screen 25 is formed by compressing and weaving of a plurality of layers of metal wires, the material is SUS304 stainless steel, the wire diameter is 0.2mm, four oil return pipes 26 are vertically and downwards arranged on the outer side of the U-shaped cavity of the oil-gas separation plate 2, at present, an oil-gas separator is externally arranged on a cylinder head cover, the separated gas is introduced into an engine for air inlet combustion, but the external oil-gas separator is generally, the efficiency is not high, the oil-gas separator oil leakage fault is easy to occur, the labyrinth partition plate 11, the partition plate 22, the coarse separation plate 23, the fine separation plate 24 and the filter screen 25 are arranged in the U-shaped cavity of the oil-gas separator oil leakage fault separating device, so that engine oil particles in oil gas in a crankcase can be subjected to multi-layer filtering separation, the whole process is good in separation effect and high in separation efficiency, the engine oil in the oil gas in the crankcase is greatly reduced, and the engine oil consumption of the engine is reduced.

Furthermore, four oil return pipes 26 are uniformly arranged around the partition plate 22, the coarse separation plate 23 and the fine separation plate 24, so that the collected engine oil at each position can return to the crankcase through the oil return pipes, and the four oil return pipes 26 are of a U-shaped pipe structure, so that a certain amount of engine oil can be deposited in the oil return pipes 26, oil and gas in the crankcase are prevented from directly entering the U-shaped cavity through the oil return pipes 26, and the oil-gas separation efficiency is improved.

Further, the rough separation plate 23 and the fine separation plate 24 are welded on the oil-gas separation plate 2 in a shape like a Chinese character 'ji', a plurality of through holes are uniformly formed in the end face of the oil-gas inlet side of the rough separation plate 23 and the end face of the oil-gas inlet side of the fine separation plate 24 and the end face of the upper side of the rough separation plate 23 and the opposite side of the fine separation plate 24 are solid faces, and oil gas can only come out from the through holes in the upper side of the rough separation plate 23 and the fine separation plate 24 after entering through holes in the air inlet side of the rough separation plate and the fine separation plate, so that the oil gas moves to 90 degrees and changes direction upwards, and the oil-gas separation efficiency is improved.

Further, a gap is formed between the partition plate 22 and the upper portion of the cavity inside the cylinder head cover body 1, oil gas enters through the oil gas inlet 21 and is blocked by the partition plate 22 when passing through the partition plate 22, engine oil particles in the oil gas are separated, and residual oil gas continues to flow downwards through the gap in the upper portion of the partition plate 22.

Furthermore, seal glue is coated between the oil-gas separation plate and the cylinder head cover body 1, so that sealing between joint surfaces of the oil-gas separation plate and the cylinder head cover body is ensured, and oil-gas leakage is prevented.

The working principle of the utility model is as follows: oil gas from an engine crankcase enters a U-shaped cavity between a cylinder head cover body 1 and an oil-gas separation plate 2 through an oil-gas inlet 21, a labyrinth partition plate 11, a partition plate 22, a coarse separation plate 23 and a fine separation plate are sequentially arranged in the cavity, the cavity is divided into a bent space, the oil gas changes the direction for a plurality of times when passing through the labyrinth partition plate 11, the oil gas changes the direction for two times when passing through the two partition plates 22, the oil gas changes the direction for two times when passing through the coarse filter plate 23, the oil gas changes the direction for two times, finally, when the oil gas enters the fine filter plate 24, a filter screen 25 is arranged in the fine filter plate 24, the oil gas can be greatly separated and collected, the oil gas changes the direction for a plurality of times for the left and the right and the up and the down, the separation of the engine oil particles in the oil gas is realized, and the separated engine oil returns to the crankcase through four oil return pipes 26 at the lower end of the oil-gas separation plate 2, the residual gas is discharged to the outside through the diaphragm valve 3 and then is reintroduced into the air inlet end of the engine, so that the oil consumption of the engine is reduced.

The preferred embodiments of the utility model disclosed above are intended to be illustrative only. The preferred embodiments are not exhaustive and do not limit the utility model to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best utilize the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a diesel engine cylinder head cover assembly, is including being cylinder head cover body (1) of lid dress, its characterized in that: the diaphragm valve (3) is mounted on the cylinder head cover body (1), the diaphragm valve (3) is fixed to the top of the upper portion of one side of the cylinder head cover body (1), the diaphragm valve (3) is communicated with the outside through an air outlet pipe (4), the air outlet pipe (4) penetrates through the cylinder head cover body (1) from the inner side to the outer side, a U-shaped channel is further arranged inside the cylinder head cover body (1), and a labyrinth partition plate (11) is uniformly arranged in the U-shaped channel;

the diesel engine cylinder head cover assembly still includes oil-gas separation board (2), oil-gas separation board (2) are fixed terminal surface under the U type passageway of cylinder head cover body (1) through the riveting, and the two forms a U type cavity, oil-gas separation board (2) are equipped with oil gas air inlet (21) in the inside one side of this U type cavity, diaphragm valve (3) are located this U type cavity and keep away from oil gas air inlet (21) one side upper portion, and the oil-gas separation board (2) of this U type cavity inboard go up perpendicularly upwards to be equipped with a plurality of baffles (22), coarse separation board (23) and smart separation board (24), smart separation board (24) inside is equipped with filter screen (25), oil-gas separation board (2) are perpendicularly to having four back oil pipe (26) in the outside of this U type cavity.

2. The diesel cylinder head cover assembly of claim 1, wherein: the four oil return pipes (26) are uniformly arranged in front of and behind the partition plate (22), the coarse separating plate (23) and the fine separating plate (24), and the four oil return pipes (26) are of a U-shaped pipe structure.

3. The diesel cylinder head cover assembly of claim 1, wherein: coarse separator plate (23), smart separator plate (24) are several style of calligraphy welds on oil gas separator plate (2), coarse separator plate (23), smart separator plate (24) oil gas side section of admitting air and upside terminal surface evenly are equipped with a plurality of through-hole, and the offside of coarse separator plate (23), smart separator plate (24) is the solid face.

4. The diesel cylinder head cover assembly of claim 1, wherein: and a gap is formed between the partition plate (22) and the upper part of the inner cavity of the cylinder head cover body (1).

5. The diesel cylinder head cover assembly of claim 1, wherein: the filter screen (25) is formed by compressing and weaving a plurality of layers of metal wires, and is made of SUS304 stainless steel with the wire diameter phi of 0.2 mm.

6. The diesel cylinder head cover assembly of claim 1, wherein: and a sealant is coated between the oil-gas separation plate (2) and the cylinder head cover body (1).