CN113217216B

CN113217216B - Valve chamber cover

Info

Publication number: CN113217216B
Application number: CN202110686178.6A
Authority: CN
Inventors: 邓厚劲; 刘芳; 耿卓
Original assignee: Sany Heavy Machinery Ltd
Current assignee: Sany Heavy Machinery Ltd
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2022-08-30
Anticipated expiration: 2041-06-21
Also published as: CN113217216A

Abstract

The invention relates to the technical field of relevant parts of engines, and aims to provide a valve chamber cover which can reduce engine noise, has high oil-gas separation efficiency, compact structure and small occupied space and is beneficial to the integrated design of the whole engine. The valve chamber cover comprises a body, wherein at least two stages of filter layers are sequentially arranged in the body from bottom to top, and the first stage filter layer is provided with a noise reduction structure. The valve chamber cover cap solves the problems of large size and large occupied space of the existing valve chamber cover cap.

Description

Valve chamber cover

Technical Field

The invention relates to the technical field of relevant parts of engines, in particular to a valve chamber cover.

Background

The valve chamber cover is a cover plate which is arranged above a valve chamber and used for protecting a camshaft and simultaneously forms an approximately closed cavity together with a cylinder cover, and oil-gas mixed gas in a crankshaft ventilation box of an engine needs to be separated through the valve chamber cover. The common valve chamber cover only has the oil-gas separation function, and can not reduce the Noise generated by mechanical parts such as a crankshaft, a connecting rod, a valve, a camshaft and the like in an engine, and influences the NVH (Noise, Vibration and Harshness) performance of a vehicle.

Therefore, the prior art has provided a plastic valve chamber cover capable of reducing engine noise and a method for reducing engine noise, which comprises a plastic valve chamber cover body, wherein a plastic cover is arranged on the plastic valve chamber cover body, the lower edge of the plastic cover is fixedly connected with the upper edge of the plastic valve chamber cover body, a closed inner cavity is formed between the inner surface of the plastic cover and the upper surface of the plastic valve chamber cover body, and a noise reduction material is arranged in the closed inner cavity. But above-mentioned valve chamber shroud's the structure of making an uproar of falling sets up in the valve chamber shroud outside, leads to its structure size increase, occupation space big, is unfavorable for the holistic design that integrates of engine.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects that the valve chamber cover in the prior art is large in size, large in occupied space and not beneficial to the integrated design of the whole engine, so that the valve chamber cover which is compact in structure, small in occupied space and beneficial to the integrated design of the whole engine is provided.

In order to solve the problems, the invention provides a valve chamber cover cap which comprises a body, wherein at least two stages of filter layers are sequentially arranged in the body from bottom to top, and the first stage of filter layer is provided with a noise reduction structure.

Preferably, the bottom surface of the first-stage filter layer faces the valve chamber, the lower edge of the first-stage filter layer is connected with the inner wall of the body in a sealing mode, a first-stage air outlet is formed in the top of the first-stage filter layer, and an acute angle is formed between the side face of the first-stage filter layer and the inner wall face of the body.

Preferably, the body is internally provided with three-stage filter layers from bottom to top in sequence, and the second-stage filter layer and the third-stage filter layer are spaced at a certain distance in the vertical direction.

Preferably, the first stage air outlet of the first stage filter layer is communicated with the inside of the second stage filter layer, the second stage air outlet of the second stage filter layer and the third stage air inlet of the third stage filter layer are communicated with the inside of the body, and the third stage air outlet of the third stage filter layer is communicated with the air outlet of the body.

Preferably, the first filtering layer and the second filtering layer are both coarse filtering layers, and the third filtering layer is a fine filtering layer.

Preferably, the second-stage filter layer and the third-stage filter layer adopt an oil-gas separator or a labyrinth oil-gas separation structure or a sheet oil-gas separation structure or a jump ring oil-gas separation structure or a PVC valve.

Preferably, a first-stage oil return port is formed in the side surface of the first-stage filter layer, and a one-way oil return valve is arranged in the first-stage oil return port; and the second-stage oil return port of the second-stage filter layer and the third-stage oil return port of the third-stage filter layer are communicated with the first-stage oil return port.

Preferably, two stages of filtering layers are sequentially arranged in the body from bottom to top, the first stage air outlet and the third stage air inlet of the third stage filtering layer are communicated with the inside of the body, and the third stage air outlet of the third stage filtering layer is communicated with the body air outlet of the body; the side surface of the first-stage filter layer is provided with a first-stage oil return port, and the first-stage oil return port is provided with a one-way oil return valve; and a third-stage oil return port of the third-stage filter layer is communicated with the first-stage oil return port.

Preferably, the first filtering layer is a coarse filtering layer, and the third filtering layer is a fine filtering layer; the third filtering layer adopts a labyrinth oil-gas separation structure or a sheet oil-gas separation structure or a clamp spring oil-gas separation structure or a PVC valve.

Preferably, the first stage filtering layer is composed of sound attenuation cotton and oil absorption cotton.

The invention has the following advantages:

(1) the valve chamber cover cap provided by the invention is internally provided with at least two stages of filter layers, wherein the first stage filter layer is provided with a noise reduction structure which is arranged in the valve chamber cover cap and is integrated with the filter layer, so that the internal structure of the valve chamber cover cap is greatly optimized, the overall structure is compact, the occupied space is small, the integrated design layout of the whole engine is facilitated, the high-integration structure is convenient for production management and maintenance of products, and meanwhile, the products can be updated more conveniently and rapidly.

(2) The valve chamber cover cap provided by the invention can be internally provided with the three-stage filter layer, so that the oil-gas separation efficiency is obviously improved under the condition of not increasing the integral size of the valve chamber seal, the use requirement of high oil-gas separation efficiency can be met, in addition, the second-stage filter layer adopts a modular design, can be arranged as required, and the production management and the maintenance of products can be effectively improved.

(3) According to the valve chamber cover cap provided by the invention, the side surface of the first-stage filter layer and the inner wall surface of the body are arranged at an acute angle, so that a transition surface is formed on the side surface of the first-stage filter layer, the oil-gas mixed gas discharged from the valve chamber is favorably in full contact with and filtration of the first-stage filter layer, and the first-stage filter layer is also favorable for fully absorbing noise.

(4) When the three-stage filter layer is arranged in the valve chamber cover cap, the second-stage filter layer and the third-stage filter layer are separated by a certain distance in the vertical direction, and the distance enables a noise reduction space to be formed between the second-stage filter layer and the third-stage filter layer, so that noise is further reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 shows a schematic view of a valve chamber cover according to an embodiment of the invention;

FIG. 2 is a schematic view showing oil-gas separation during operation of a valve chamber cover according to an embodiment of the present invention;

FIG. 3 shows a schematic view of a second valve chamber cover according to an embodiment of the invention.

Description of reference numerals:

1-body, 101-body air outlet;

2-a first-stage filter layer, 201-a first-stage air outlet, 202-a first-stage oil return port, and 203-a one-way oil return valve;

3-a second-stage filter layer, 301-a second-stage air outlet and 302-a second-stage oil return port;

4-third-stage filter layer, 401-third-stage air inlet, 402-third-stage air outlet and 403-third-stage oil return port.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example one

As shown in fig. 1, a preferred embodiment of the valve chamber cover of the present invention.

The valve chamber cover comprises a body 1, the body 1 is arranged above the valve chamber, and the bottom of the body 1 is communicated with the valve chamber. At least two stages of filtering layers are sequentially arranged in the body 1 from bottom to top, wherein the first stage filtering layer 2 has a noise reduction structure.

In this embodiment, the body 1 is provided with three filter layers from bottom to top, which are a first filter layer 2, a second filter layer 3 and a third filter layer 4 in sequence, wherein the first filter layer 2 and the second filter layer 3 are both coarse filter layers, and the third filter layer 4 is a fine filter layer.

First order filter layer 2 adopts the cotton mixed structure design of amortization and oil absorption, for example amortization cotton and the cotton layering of oil absorption superpose mode etc. for first order filter layer 2 can reduce the noise that the engine produced and can filter the mixed oil gas again. The bottom surface of the first stage filter layer 2 faces the valve chamber, namely the bottom surface of the first stage filter layer 2 is directly contacted with the oil-gas mixture discharged from the valve chamber. The lower edge of the first stage filter layer 2 is connected with the inner wall of the body 1 in a sealing way, and the first stage filter layer 2 can be integrally formed with the body 1 under the condition that the processing technology allows. The top of the first-stage filter layer 2 is provided with a first-stage air outlet 201, the side surface of the first-stage filter layer 2 is provided with a first-stage oil return opening 202, the first-stage oil return opening 202 is provided with a one-way oil return valve 203, and engine oil after oil-gas separation flows back to the valve chamber from the one-way oil return valve 203. The side surface of the first-stage filter layer 2 and the inner wall surface of the body 1 form an acute angle (alpha in the figure), and the design of the acute angle enables the side surface of the first-stage filter layer 2 to form a transition surface, so that the oil-gas mixed gas discharged from the valve chamber is in full contact with and filtered by the first-stage filter layer 2, and the noise is also absorbed by the first-stage filter layer 2 fully.

For further noise reduction, the second stage filter layer 3 is spaced from the third stage filter layer 4 in the vertical direction by a distance that forms a noise reduction space, which contributes to further noise reduction. The first level gas outlet 201 of the first level filter layer 2 is communicated with the inside of the second level filter layer 3, the second level gas outlet 301 of the second level filter layer 3, the third level gas inlet 401 of the third level filter layer 4 are communicated with the inside of the body 1, the third level gas outlet 402 of the third level filter layer 4 is communicated with the body gas outlet 101 of the body 1, and the second level oil return opening 302 of the second level filter layer 3, the third level oil return opening 403 of the third level filter layer 4 are communicated with the first level oil return opening 202. In this embodiment, the engine oil flowing out from the second-stage oil return port 302 of the second-stage filter layer 3 and the third-stage oil return port 403 of the third-stage filter layer 4 directly drops downward, and the dropped engine oil flows downward along the upper surface of the side surface of the first-stage filter layer 2 due to the fact that the side surface of the first-stage filter layer 2 and the bottom of the body 1 form an acute angle, and finally flows back to the valve chamber through the one-way oil return valve 203 of the first-stage oil return port 202.

According to different use requirements, the second-stage filter layer 3 and the third-stage filter layer 4 can adopt independent oil-gas separators or adopt a labyrinth oil-gas separation structure or a sheet oil-gas separation structure or a snap spring oil-gas separation structure or a PVC valve and the like, and the interior of the second-stage filter layer 3 and the interior of the third-stage filter layer 4 can be designed into various oil-gas separation structures according to requirements, which is not limited in the invention.

The working process of the air door chamber cover cap of the embodiment of the invention is described as follows:

as shown in fig. 2, the oil-gas mixture discharged from the valve chamber contacts with the first filter layer 2, the first filter layer 2 can primarily filter large granular oil mist, and meanwhile, the first filter layer 2 can absorb and reduce noise generated by the engine; then, the oil-gas mixture gas filtered by the first stage filter layer 2 enters the second stage filter layer 3 from the first stage gas outlet 201 to be subjected to second oil-gas separation and filtration; the oil-gas mixed gas filtered by the second-stage filter layer 3 enters the body 1 from the second-stage gas outlet 301 and further enters the third-stage gas inlet 401 of the third-stage filter layer 4, oil-gas separation and filtration are completed through fine filtration of the third-stage filter layer 4, and the gas filtered by the third-stage filter layer 4 is discharged from the body gas outlet 101 and then is connected with a pipeline to return to the gas inlet system; the engine oil filtered by the first filter layer 2 flows back to the valve chamber through the first oil return port 202, and the engine oil filtered by the second filter layer 3 and the third filter layer 4 finally flows back to the valve chamber in a downward dripping mode.

Through the three-stage separation and filtration, the oil-gas separation efficiency is obviously improved, and the engine oil consumption of the engine can be more effectively reduced.

In other embodiments, the second-stage oil return port 302 of the second-stage filter layer 3 and the third-stage oil return port 403 of the third-stage filter layer 4 can also be communicated with the first-stage oil return port 202 through pipelines, so that the filtered engine oil can flow back to the valve chamber more quickly, and the separation efficiency is further improved.

Example two

As shown in fig. 3, the valve chamber cover of the present embodiment is different from the first embodiment in that:

under the condition that the requirement on the oil-gas separation efficiency is not very high, two stages of filtering layers can be arranged in the body 1 of the valve chamber cover from bottom to top, namely a first filtering layer 2 and a third filtering layer 4 in sequence, wherein the first filtering layer 2 is a rough filtering layer, and the third filtering layer 4 is a fine filtering layer, so that the equipment cost is reduced.

The first-stage filter layer 2 is designed by adopting a mixed structure of silencing cotton and oil absorption cotton, so that the noise generated by the engine can be reduced, and the mixed oil gas can be filtered. The first level gas outlet 201 of the first level filter layer 2, the third level gas inlet 401 of the third level filter layer 4 are communicated with the inside of the body 1, and the third level gas outlet 402 of the third level filter layer 4 is communicated with the body gas outlet 101 of the body 1. The side surface of the first-stage filter layer 2 is provided with a first-stage oil return port 202, and the first-stage oil return port 202 is provided with a one-way oil return valve 203; the third-stage oil return opening 403 of the third-stage filter layer 4 communicates with the first-stage oil return opening 202.

According to different use requirements, the third filtering layer 4 adopts a labyrinth type oil-gas separation structure or a sheet type oil-gas separation structure or a clamp spring type oil-gas separation structure or a PVC valve.

The working process of the valve chamber cover of the second embodiment of the invention is described as follows:

the oil-gas mixed gas discharged from the valve chamber contacts with the first-stage filter layer 2, the first-stage filter layer 2 can preliminarily filter large granular oil mist, and meanwhile, the first-stage filter layer 2 can absorb and reduce noise generated by an engine; then, the oil-gas mixture filtered by the first filtering layer 2 enters the body 1 from the first gas outlet 201 and then enters the third gas inlet 401 of the third filtering layer 4, oil-gas separation and filtration are completed through fine filtration of the third filtering layer 4, and the gas filtered by the third filtering layer 4 is discharged from the body gas outlet 101 and then returns to the gas inlet system through pipeline connection; the engine oil filtered by the first filter layer 2 flows back to the valve chamber through the first oil return port 202, and the engine oil filtered by the third filter layer 4 finally flows back to the valve chamber in a downward dripping manner.

In other embodiments, the third-stage oil return opening 403 of the third-stage filter layer 4 can also be communicated with the first-stage oil return opening 202 through a pipeline, so that the filtered engine oil can flow back to the valve chamber more quickly, and the separation efficiency is further improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A valve chamber cover comprising a body (1), characterized in that: at least two stages of filter layers are sequentially arranged in the body (1) from bottom to top, wherein the first stage filter layer (2) is provided with a noise reduction structure; the bottom surface of first order filter layer (2) is towards the valve room, the lower limb of first order filter layer (2) with the inner wall sealing connection of body (1), the top of first order filter layer (2) has first order gas outlet (201), the side of first order filter layer (2) with the internal wall face of body (1) becomes the acute angle, the side of first order filter layer (2) has first order oil return opening (202).

2. The valve chamber cover according to claim 1, wherein: three-stage filtering layers are sequentially arranged in the body (1) from bottom to top, and the second-stage filtering layer (3) and the third-stage filtering layer (4) are spaced at a certain distance in the vertical direction.

3. The valve chamber cover according to claim 2, wherein: first order gas outlet (201) of first order filter layer (2) and the inside intercommunication of second level filter layer (3), second level gas outlet (301) of second level filter layer (3), third level air inlet (401) of third level filter layer (4) with the inside intercommunication of body (1), third level gas outlet (402) of third level filter layer (4) with body gas outlet (101) intercommunication of body (1).

4. The valve chamber cover according to claim 3, wherein: the first-stage filter layer (2) and the second-stage filter layer (3) are both coarse filter layers, and the third-stage filter layer (4) is a fine filter layer.

5. The valve chamber cover according to claim 4, wherein: the second-stage filter layer (3) and the third-stage filter layer (4) adopt an oil-gas separator or a labyrinth oil-gas separation structure or a sheet oil-gas separation structure or a jump ring oil-gas separation structure or a PVC valve.

6. The valve chamber cover according to any one of claims 2 to 5, wherein: the first-stage oil return port (202) is provided with a one-way oil return valve (203); and a second-stage oil return opening (302) of the second-stage filter layer (3) and a third-stage oil return opening (403) of the third-stage filter layer (4) are communicated with the first-stage oil return opening (202).

7. The valve chamber cover according to claim 1, wherein: two stages of filtering layers are sequentially arranged in the body (1) from bottom to top, the first stage air outlet (201) and the third stage air inlet (401) of the third stage filtering layer (4) are communicated with the inside of the body (1), and the third stage air outlet (402) of the third stage filtering layer (4) is communicated with the body air outlet (101) of the body (1); a first-stage oil return opening (202) is formed in the side face of the first-stage filter layer (2), and a one-way oil return valve (203) is arranged in the first-stage oil return opening (202); and a third-stage oil return opening (403) of the third-stage filter layer (4) is communicated with the first-stage oil return opening (202).

8. The valve chamber cover according to claim 7, wherein: the first filtering layer (2) is a coarse filtering layer, and the third filtering layer (4) is a fine filtering layer; the third filtering layer (4) adopts a labyrinth oil-gas separation structure or a sheet oil-gas separation structure or a jump ring oil-gas separation structure or a PVC valve.

9. The valve chamber cover according to claim 1, wherein: the first-stage filter layer (2) is composed of noise reduction cotton and oil absorption cotton.