Oil and gas separator for on-vehicle screw air compressor

Abstract

The present invention provides an oil-gas separator for an on-vehicle screw air compressor, which comprises an upper shell and a lower shell that are buckled up and down. An oil-gas inlet is provided above the upper shell, and above the oil-gas inlet is connected to a screw main engine as a main oil-gas mixing inlet. An intake inner pipe is arranged inside the upper shell at the oil-gas inlet. Lateral openings are provided on the side wall of the intake inner pipe. An outer sleeve pipe is arranged on the inner wall of the upper shell around the intake inner pipe, and a swirling baffle is provided at the lateral openings. Both ends of the swirling baffle are respectively connected to the inner wall of the outer sleeve pipe and the outer wall of the intake inner pipe. The outer sleeve pipe extends axially downward to above the oil liquid level in the lower shell and is separated from the oil liquid level; a plurality of baffles extending axially are circumferentially distributed on the inner wall of the lower shell. By arranging the swirling baffle, the outer sleeve pipe and the baffles, the speed of the oil-gas mixture can be quickly reduced, and it has the characteristics of high oil-gas separation efficiency and high purity.

Description

Technical Field

[0001] The present invention relates to the technical field of oil-gas separation, and particularly to an oil-gas separator for a vehicle-mounted screw air compressor. Background Art

[0002] A vehicle-mounted screw air compressor is a core device of an automotive pneumatic system. By inhaling the surrounding air and making it enter the compression main unit, the male and female rotors in the main unit change the volume in the main unit through meshing motion. At the same time, oil is continuously injected into the cavity to lubricate and cool the screw, thus generating a heated oil-gas mixture. The oil-gas mixture needs to be separated by an oil-gas separator before entering the pneumatic system. The main component for realizing oil-gas separation is the oil-gas separator. The existing structure of the oil-gas separator has a problem that the flow rate of the compressed gas is too fast, resulting in incomplete oil-gas separation and relatively high noise. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: in order to overcome the deficiencies in the prior art, the present invention provides a new type of oil-gas separator for a vehicle-mounted screw air compressor.

[0004] The technical solution adopted by the present invention to solve its technical problem is: an oil-gas separator for a vehicle-mounted screw air compressor, including an upper housing and a lower housing that are buckled up and down. An oil-gas inlet is provided above the upper housing, and the upper part of the oil-gas inlet is connected to a screw main unit as a main oil-gas mixing inlet. In order to quickly reduce the flow rate of the oil-gas and separate the oil-gas, an intake inner tube is provided in the upper housing at the oil-gas inlet. A lateral opening is provided on the side wall of the intake inner tube. An outer sleeve is provided on the inner wall of the upper housing around the intake inner tube. And a spiral baffle is provided at the lateral opening. The spiral baffle is arc-shaped, and the airflow direction of the lateral opening is directly opposite to the spiral baffle, so as to generate a spiral airflow under the action of the spiral baffle, realizing the rotational separation of the oil-gas mixture. The two ends of the spiral baffle are respectively connected to the inner wall of the outer sleeve and the outer wall of the intake inner tube. The outer sleeve extends axially downward to above the oil liquid level in the lower housing and is separated from the oil liquid level.

[0005] Further, in order to reduce the flow rate of the airflow and improve the separation efficiency, a plurality of baffles extending axially are circumferentially distributed on the inner wall of the lower housing.

[0006] Further, a plurality of outer reinforcing ribs of the lower housing are provided on the outer wall of the lower housing. On the one hand, the housing can be made more firm through the reinforcing ribs. On the other hand, since the temperature of the oil-gas will rise when the oil-gas is compressed, the reinforcing ribs also improve the heat dissipation capacity of the lower housing.

[0007] Further, in order to export the separated compressed gas, a separator gas outlet is further provided on the upper housing. The compressed gas coming out of the separator gas outlet will more or less still carry a certain amount of oil. Therefore, a spiral guide groove is provided at the separator gas outlet, and an oil fine separator is covered on the separator gas outlet. An oil fine separation rod is provided inside the oil fine separator. The spiral guide groove coils around the oil fine separation rod. The lower end of the oil fine separation rod is connected to the upper housing at the separator gas outlet, and the oil fine separation rod is of a hollow structure, with the upper end communicating with the inside of the oil fine separator and the lower end connected to an exhaust elbow on the upper housing through a pipeline inside the upper housing. The compressed gas comes out of the separator gas outlet and forms a spiral air flow along the spiral guide groove. Under the action of centrifugal force, the liquid in the gas adheres to the inner wall of the oil fine separator and then flows back into the spiral guide groove. The gas at the top passes through the oil fine separation rod and is connected to a gas tank or a pneumatic system through the exhaust elbow.

[0008] Further, in order to make the oil inside the oil fine separator flow back into the spiral main engine, a return oil interface is further provided on the upper housing. The return oil interface communicates with a guide groove inside the oil fine separator, and the return oil interface is connected to a bearing at the end of the screw main engine head through a pipeline, so as to lead the oil liquid in the guide groove back into the screw main engine for lubricating the bearing.

[0009] Further, an oil filter interface is further provided on the upper housing. An oil filter is covered on the oil filter interface. The oil filter is connected to a first position of the spiral main engine through a pipeline, and the oil filter interface communicates with the inside of the oil-gas separator; an oil drain port is provided on the lower housing. The oil drain port is connected to a second position of the spiral main engine through a pipeline, and the first position is located below the second position.

[0010] The oil filter is mainly used to filter the oil of the spiral main engine. The oil liquid in the spiral main engine is guided to the oil filter through a pipeline, and after being filtered, cooled and silenced by the oil filter, it enters the oil-gas separator. The oil liquid at the bottom of the oil-gas separator is then drained back into the spiral main engine through a pipeline, realizing the filtration and heat dissipation of the oil liquid in the spiral main engine.

[0011] Further, in order to improve the strength and heat dissipation capacity of the upper housing, a plurality of upper housing inner strengthening ribs extending axially are circumferentially provided on the inner wall of the upper housing.

[0012] Further, in order to realize the connection between the upper housing and the lower housing, outer edges of the connection surfaces of the upper housing and the lower housing are respectively provided with upper housing connection holes and lower housing connection holes, and the upper housing connection holes and the lower housing connection holes are in one-to-one correspondence up and down and are connected by screws.

[0013] The beneficial effects of the present invention are: An oil-gas separator for a vehicle-mounted screw air compressor provided by the present invention can quickly reduce the speed of the oil-gas mixture and has the characteristics of high oil-gas separation efficiency and high purity. Description of the Drawings

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a schematic assembly structure diagram of the oil-gas separator of the present invention.

[0016] Figure 2 It is a schematic structural diagram of the oil-gas separator of the present invention.

[0017] Figure 3 It is a schematic structural diagram of the upper housing.

[0018] Figure 4 It is a schematic structural diagram of the lower housing.

[0019] In the figure: 100, oil-gas separator; 200, screw main engine; 300, oil fine separator; 400, oil filter; 1, upper housing; 11, oil-gas inlet; 12, oil filling port; 13, oil filter interface; 14, oil inlet; 15, safety valve interface; 16, separator gas outlet; 17, exhaust elbow; 18, oil return interface; 19, unloading interface; 1A, internal reinforcing rib of the upper housing; 1B, connection hole of the upper housing; 2, lower housing; 21, oil discharge port; 22, baffle; 23, external reinforcing rib of the lower housing; 24, connection hole of the lower housing; 3, outer sleeve; 4, spiral baffle; 5, oil fine separation rod; 6, intake inner pipe. Specific embodiments

[0020] The present invention will now be described in detail in conjunction with the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, so it only shows the components related to the present invention.

[0021] As Figures 1-4 shown, an oil-gas separator 100 for a vehicle-mounted screw air compressor according to the present invention includes an upper housing 1 and a lower housing 2 that are buckled up and down. An oil-gas inlet 11 is provided above the upper housing 1. The upper part of the oil-gas inlet 11 is connected to the screw main engine 200 as the main oil-gas mixing inlet. An intake inner pipe 6 is provided inside the upper housing 1 at the oil-gas inlet 11. A lateral opening is provided on the side wall of the intake inner pipe 6. An outer sleeve 3 is provided on the inner wall of the upper housing 1 around the intake inner pipe 6. And a spiral baffle 4 is provided at the lateral opening. The spiral baffle 4 is arc-shaped, and the air flow direction of the lateral opening is directly opposite to the spiral baffle 4, so as to generate a spiral air flow under the action of the spiral baffle 4. Both ends of the spiral baffle 4 are respectively connected to the inner wall of the outer sleeve 3 and the outer wall of the intake inner pipe 6. The outer sleeve 3 extends axially downward to above the oil liquid level in the lower housing 2 and is separated from the oil liquid level. A plurality of baffles 22 extending axially are circumferentially distributed on the inner wall of the lower housing 2; a plurality of external reinforcing ribs 23 of the lower housing are provided on the outer wall for strengthening and heat dissipation.

[0022] In order to export the separated compressed gas, a separator gas outlet 16 is further provided on the upper housing 1. The compressed gas coming out of the separator gas outlet 16 will more or less still carry a certain amount of oil. Therefore, a spiral guide groove is provided at the separator gas outlet 16, and an oil fine separator 300 is covered on the separator gas outlet 16. An oil fine separation rod 5 is provided inside the oil fine separator 300. The spiral guide groove coils around the oil fine separation rod 5. The lower end of the oil fine separation rod 5 is connected to the upper housing 1 at the separator gas outlet 16, and the oil fine separation rod 5 is of a hollow structure, with the upper end communicating with the inside of the oil fine separator 300 and the lower end connected to the exhaust elbow 17 on the upper housing 1 through a pipeline inside the upper housing 1. The compressed gas comes out of the separator gas outlet 16 and forms a spiral air flow along the spiral guide groove. Under the action of centrifugal force, the liquid in the gas adheres to the inner wall of the oil fine separator 300 and then flows back into the spiral guide groove. The gas at the top passes through the oil fine separation rod 5 and is connected to an air tank or a pneumatic system through the exhaust elbow 17.

[0023] In order to make the oil inside the oil fine separator 300 flow back into the spiral main engine, a return oil interface 18 is further provided on the upper housing 1. The return oil interface 18 is communicated with the guide groove inside the oil fine separator 300, and the return oil interface 18 is connected to the bearing at the end of the screw main engine 200 head through a pipeline, for leading the oil liquid in the guide groove back into the screw main engine 200 for the lubrication of the bearing. A relief interface 19 is further provided on the upper housing 1 below the return oil interface 18. The relief interface 19 is connected to the screw main engine 200 head through a pipeline.

[0024] An oil filter interface 13 is further provided on the upper housing 1, and an oil filter 400 is covered on the oil filter interface 13. The oil inlet 14 of the oil filter 400 is connected to the first position of the spiral main engine through a pipeline, and the oil filter interface 13 is communicated with the inside of the oil-gas separator 100; an oil drain port 21 is provided on the lower housing 2, and the oil drain port 21 is connected to the second position of the spiral main engine through a pipeline, and the first position is below the second position.

[0025] In order to supplement the oil liquid in the screw main engine, a filling port 12 is further provided on the upper housing 1 for supplementing hydraulic oil. In order to improve the strength and heat dissipation capacity of the upper housing 1, a plurality of upper housing inner reinforcing ribs 1A extending axially are circumferentially provided on the inner wall of the upper housing 1. A safety valve interface 15 is further provided on the upper housing 1 for installing a safety valve; in order to realize the connection between the upper housing 1 and the lower housing 2, upper housing connection holes AB and lower housing connection holes 24 are respectively provided at the outer edges of the connection surfaces of the upper housing 1 and the lower housing 2, and the upper housing connection holes AB and the lower housing connection holes 24 are in one-to-one correspondence up and down and are connected by screws.

[0026] Working principle:

[0027] The oil-gas mixture enters the intake inner pipe 6 from the oil-gas inlet 11, rushes in through the lateral opening on the side wall of the intake inner pipe 6, and impacts on the helical baffle 4, so that the incoming oil-gas mixture generates a helical rotation. The oil-gas mixture rotates spirally downward along the inner side wall of the outer sleeve 3. Under the action of centrifugal force, large-particle liquids in the oil-gas mixture adhere to the inner wall of the outer sleeve 3 and can flow downward along the inner wall and drip into the oil liquid below the lower housing 2; the helical oil-gas mixture in the outer sleeve 3 disperses after impacting on the oil liquid level below, and then the gas flow spirally rises along the inner wall of the lower housing 2, impacts on the baffle 22 on the inner wall to decelerate the spirally rising gas flow, and at the same time the oil liquid will hang on the baffle 22 and adhere to the inner wall of the lower housing 2 under the action of centrifugal force, further realizing oil-gas separation.

[0028] Inspired by the above ideal embodiments of the present invention, through the above description, relevant workers can completely make various changes and modifications without departing from the scope of the present invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An oil-gas separator for a vehicle-mounted screw air compressor, characterized in that: It includes an upper housing and a lower housing that are snap-fitted up and down. An oil and gas inlet is provided above the upper housing. The upper part of the oil and gas inlet is connected to a screw main engine as the main oil and gas mixing inlet. An intake inner pipe is provided inside the upper housing at the oil and gas inlet. Lateral openings are provided on the side wall of the intake inner pipe. An outer sleeve is provided on the inner wall of the upper housing around the intake inner pipe. And a spiral baffle is provided at the lateral openings. The air flow direction at the lateral openings is directly opposite to the spiral baffle, so that a spiral air flow is generated under the action of the spiral baffle to realize the rotary separation of the oil and gas mixture. The two ends of the spiral baffle are respectively connected to the inner wall of the outer sleeve and the outer wall of the intake inner pipe. The outer sleeve extends axially downward to above the oil liquid level in the lower housing and is separated from the oil liquid level. A plurality of baffles extending axially are circumferentially distributed on the inner wall of the lower housing. A separator air outlet is further provided on the upper housing. A spiral guide groove is provided at the separator air outlet. And an oil fine separator is covered on the separator air outlet. An oil fine separation rod is provided inside the oil fine separator. The lower end of the oil fine separation rod is connected to the upper housing at the separator air outlet. And the oil fine separation rod is of a hollow structure. The upper end is communicated with the inside of the oil fine separator. The lower end is connected to an exhaust elbow on the upper housing through a pipeline inside the upper housing.

2. The oil-gas separator for on-vehicle screw air compressor according to claim 1, wherein: A plurality of outer reinforcing ribs of the lower housing are provided on the outer wall of the lower housing.

3. The oil-gas separator for on-vehicle screw air compressor according to claim 1, characterized in that: A return oil interface is further provided on the upper housing. The return oil interface is communicated with a guide groove inside the oil fine separator. And the return oil interface is connected to the screw main engine through a pipeline.

4. The oil-gas separator for on-vehicle screw air compressor according to claim 1, wherein: An oil filter interface is further provided on the upper housing. An oil filter is covered on the oil filter interface. The oil filter is connected to a first position of the screw main engine through a pipeline. And the oil filter interface is communicated with the inside of the oil and gas separator. A drain port is provided on the lower housing. The drain port is connected to a second position of the screw main engine through a pipeline. And the first position is located below the second position.

5. The oil-gas separator for on-vehicle screw air compressor according to claim 1, wherein: A plurality of inner reinforcing ribs of the upper housing extending axially are circumferentially provided on the inner wall of the upper housing.

6. The oil-gas separator for on-vehicle screw air compressor according to claim 1, characterized in that: Upper housing connection holes and lower housing connection holes are respectively provided at the outer edges of the connection surfaces of the upper housing and the lower housing. And the upper housing connection holes and the lower housing connection holes correspond to each other up and down and are connected by screws.

Images