CN112065533B

CN112065533B - Oil-gas pre-separation device and engine

Info

Publication number: CN112065533B
Application number: CN202010773334.8A
Authority: CN
Inventors: 谢兴旺; 魏红玲; 徐庆增
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2021-11-19
Anticipated expiration: 2040-08-04
Also published as: CN112065533A

Abstract

The invention belongs to the technical field of oil-gas separators of engines, and particularly relates to an oil-gas pre-separating device and an engine. The oil-gas pre-separation device comprises a driving unit and a separation unit, wherein the separation unit is connected with the driving unit and comprises a first plate body and a plurality of impeller assemblies, and the impeller assemblies are arranged at intervals along the circumferential direction of the first plate body. Through using the oil gas preseparation device among this technical scheme, drive unit can drive impeller subassembly and rotate to make impeller subassembly produce and rotate centrifugal force, the great machine oil particle of density can be appeared on impeller subassembly's the surface, and outside being got rid of the separation unit, effectively separate the machine oil particle in the oil gas, separation efficiency has obtained the improvement, has promoted oil gas preseparation device's reliability simultaneously.

Description

Oil-gas pre-separation device and engine

Technical Field

The invention belongs to the technical field of oil-gas separators of engines, and particularly relates to an oil-gas pre-separating device and an engine.

Background

During engine operation, a very small amount of high pressure gas in the combustion chamber enters the crankcase through the clearance between the piston rings and the cylinder liner, causing the crankcase pressure to rise. In order to ensure the operational reliability of the diesel engine, the crankcase is connected to the atmosphere (or to the engine intake) in order to ensure a pressure balance in the crankcase, the connection means being called an air-oil separator (or breather), the connection to the atmosphere being called an open circuit, and the connection to the intake being called a closed circuit.

High-pressure oil of the existing oil-gas pre-separation device is sprayed out at a high speed through a nozzle, a centrifugal device is driven to rotate to realize oil-gas separation, and if oil is taken from a dirty oil channel or engine oil is dirty, the nozzle is blocked, and the function of the oil-gas pre-separation device fails.

Disclosure of Invention

The invention aims to at least solve the problem that the oil is excessively dirty so that a nozzle and an oil-gas separator are in failure. The purpose is realized by the following technical scheme:

the first aspect of the invention provides an oil-gas preseparation device, which comprises:

a drive unit;

the separation unit is connected with the driving unit and comprises a first plate body and a plurality of impeller assemblies, and the impeller assemblies are arranged at intervals along the circumferential direction of the first plate body.

Through using the oil gas preseparation device among this technical scheme, drive unit can drive impeller subassembly and rotate to make impeller subassembly produce and rotate centrifugal force, the great machine oil particle of density can be appeared on impeller subassembly's the surface, and outside being got rid of the separation unit, effectively separate the machine oil particle in the oil gas, separation efficiency has obtained the improvement, has promoted oil gas preseparation device's reliability simultaneously.

In addition, the oil-gas preseparation device can also have the following additional technical characteristics:

in some embodiments of the invention, the impeller assembly comprises impeller blades distributed in an involute along the center of the first plate.

In some embodiments of the invention, the impeller blades are arcuate in configuration.

In some embodiments of the invention, the impeller assembly further comprises a first barrier plate and a second barrier plate, the first barrier plate, the second barrier plate and the impeller blade forming a first cavity therebetween.

In some embodiments of the invention, a gap is provided between one end of the first barrier plate and one end of the second barrier plate.

In some embodiments of the invention, the impeller blades are provided with a mesh structure which is uniformly arranged.

In some embodiments of the invention, a plurality of the impeller assemblies define an air exit region therebetween.

In some embodiments of the present invention, the separation unit further includes a second plate and an air outlet pipe, the second plate is located at one end of the impeller assembly away from the first plate, an air outlet hole is formed in the center of the second plate, the air outlet hole corresponds to the air outlet region, and the air outlet hole is matched with the air outlet pipe.

In some embodiments of the invention, the first plate body is provided with two bolt portions, and the two bolt portions are symmetrically arranged along the center of the first plate body.

The invention also provides an engine which comprises the oil-gas preseparation device in any one of the above embodiments.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:

FIG. 1 schematically shows an overall structural view of an oil-gas preseparation device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the separation unit of the oil-gas preseparator of FIG. 1;

FIG. 3 is a schematic diagram of the separation unit of the oil-gas preseparator of FIG. 2 from another perspective.

10: a drive unit;

20: separation unit, 21: first plate body, 211: bolt portion, 22: impeller assembly, 221: impeller blades, 2211: mesh structure, 222: first barrier plate, 223: second barrier plate, 224: gap, 225: first cavity, 23: gas outlet area, 24: second plate body, 25: an air outlet pipe;

30: a cover plate;

40: and a sealing unit.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Fig. 1 schematically shows an overall structural view of an oil-gas preseparation device according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a separation unit of the oil-gas preseparator in FIG. 1. FIG. 3 is a schematic diagram of the separation unit of the oil-gas preseparator of FIG. 2 from another perspective. As shown in figures 1, 2 and 3, the invention provides an oil-gas preseparation device and an engine. The oil-gas pre-separation device comprises a driving unit 10 and a separation unit 20, wherein the separation unit 20 is connected with the driving unit 10, the separation unit 20 comprises a first plate body 21 and a plurality of impeller assemblies 22, and the impeller assemblies 22 are arranged at intervals along the circumferential direction of the first plate body 21.

Through using oil gas preseparation device among this technical scheme, drive unit 10 can drive impeller subassembly 22 and rotate to make impeller subassembly 22 produce and rotate centrifugal force, the great machine oil particle of density can be appeared on impeller subassembly 22's the surface, and outside being got rid of separating unit 20, effectively separate the machine oil particle in the oil gas, separation efficiency has obtained the improvement, has promoted oil gas preseparation device's reliability simultaneously.

Further, in the present embodiment, the impeller assembly 22 includes impeller blades 221, and the impeller blades 221 are distributed along the center of the first plate 21 in an involute shape. When the driving unit 10 drives the impeller assembly 22 to rotate, the impeller assembly 22 generates a rotating centrifugal force, and engine oil particles with high density are separated out on the surface of the impeller blades 221 distributed in an involute manner and thrown out of the separation unit 20, so that the engine oil particles in oil gas are effectively separated, the separation efficiency is improved, and the reliability of the oil gas pre-separation device is improved.

Specifically, in the present embodiment, the impeller blades 221 are of an arc-shaped structure, and the separation unit 20 in the present embodiment rotates clockwise, so that when the separation unit 20 rotates, the oil particles can be thrown onto the arc-shaped structure by centrifugal force, and will be finally discharged out of the separation unit 20 along the path of the arc-shaped structure.

Further, in other embodiments, the impeller assembly 22 further comprises a first barrier plate 222 and a second barrier plate 223, and a first cavity 225 is formed between the first barrier plate 222, the second barrier plate 223 and the impeller blade 221. The separation unit 20 in this embodiment rotates counterclockwise, so that when the separation unit 20 rotates, the engine oil particles can stay in the arc-shaped structure of the impeller blades 221 and enter the first cavity 225 through the meshes of the impeller blades 221, thereby removing the engine oil particles.

Specifically, in other embodiments, a gap 224 is provided between one end of the first barrier plate 222 and one end of the second barrier plate 223. The gap 224 may allow the oil introduced into the first cavity 225 to flow out of the first cavity 225 through the gap 224, thereby being discharged to the outside of the separation unit 20.

Specifically, in other embodiments, the mesh 2211 is uniformly arranged on the impeller blades 221, so that the engine oil particles can pass through and be retained in the first cavity 225, thereby improving the separation efficiency.

Further, in the present embodiment, the plurality of impeller assemblies 22 constitute a gas outlet area 23 therebetween for the outflow of the gas of the separation unit 20.

Specifically, in this embodiment, the separation unit 20 further includes a second plate 24 and an air outlet pipe 25, the second plate 24 is located at an end of the impeller assembly 22 far from the first plate 21, so that the impeller assembly 22 is located between the first plate 21 and the second plate 24 and is disposed opposite to the first plate 21, and effective separation of oil and gas is achieved. The center of the second plate body 24 is provided with an air outlet hole, the air outlet hole corresponds to the air outlet area 23, the air outlet hole is matched with an air outlet pipe 25, and the air outlet pipe 25 is used for discharging gas after oil gas pre-separation.

Further, in the present embodiment, the first plate body 21 is provided with two bolt portions 211, the two bolt portions 211 are symmetrically disposed along the center of the first plate body 21, the bolt portions 211 are used for connecting the separation unit 20 and the driving unit 10, and the driving unit 10 in the present embodiment is a driving gear.

In particular, in the present embodiment, the separation unit 20 is a plastic component, which is light in weight, and reduces the weight of the whole oil-gas preseparation device.

Specifically, in the present embodiment, the oil-gas preseparation device further includes a cover plate 30 and a sealing unit 40, the sealing unit 40 is disposed through the center of the cover plate 30, and the sealing unit 40 in the present embodiment is an oil seal for sealing between the atmosphere and the gear chamber. The cover plate 30 is connected to the separating unit 20 for separating the atmosphere and the gear chamber.

Further, the working process in the embodiment is as follows: the separation unit 20 is fixed on the driving gear by bolts or other methods, and is driven by the driving gear to rotate, wherein the gear chamber is communicated with the crankcase, gas in the crankcase enters from the circumferential direction of the separation unit 20, because the separation unit 20 rotates rapidly, engine oil particles with high density are separated out on the surface of the impeller assembly 22 by the action of impact and centrifugal force, and flow into the first cavity 225 through the mesh structure 2211, oil is thrown out through the gap 224 due to centrifugal action, pre-separated gas flows out through the gas outlet area 23, and the gas separated by the separation unit 20 finally flows to the atmosphere through the gas outlet pipe 25.

The invention also provides an engine which comprises the oil-gas pre-separation device.

Through using the engine among this technical scheme, oil gas preseparation device's on the engine drive unit can drive impeller assembly and rotate to make impeller assembly produce and rotate centrifugal force, the great machine oil particle of density can be appeared to impeller assembly on the surface, and outside being got rid of the separation unit, effectively separate the machine oil particle in the oil gas, separation efficiency has obtained the improvement, has promoted oil gas preseparation device's reliability simultaneously.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A gas-oil preseparation device, characterized by comprising:

a drive unit;

the separation unit is connected with the driving unit and comprises a first plate body and a plurality of impeller assemblies, and the impeller assemblies are arranged at intervals along the circumferential direction of the first plate body;

the impeller assembly comprises impeller blades which are distributed along the center of the first plate body in an involute manner;

the impeller assembly further comprises a first baffle plate and a second baffle plate, and a first cavity is formed among the first baffle plate, the second baffle plate and the impeller blade;

a gap is formed between one end of the first blocking plate and one end of the second blocking plate;

the impeller blades are provided with uniformly arranged mesh structures.

2. The oil and gas preseparation device according to claim 1, wherein said impeller blades are of arcuate configuration.

3. The oil and gas preseparation device according to claim 1, wherein a plurality of said impeller assemblies define a gas outlet zone therebetween.

4. The oil-gas preseparation device according to claim 3, characterized in that the separation unit further comprises a second plate body and an air outlet pipe, the second plate body is positioned at one end of the impeller assembly far away from the first plate body, an air outlet hole is arranged in the center of the second plate body, the air outlet hole corresponds to the air outlet area, and the air outlet hole is matched with the air outlet pipe.

5. The oil-gas preseparation device according to claim 1, characterized in that said first plate is provided with two bolt portions, said two bolt portions being symmetrically arranged along the center of said first plate.

6. An engine, characterized by having an oil and gas preseparation device according to any one of claims 1-5.