CN108678956B - Oil-gas separator - Google Patents

Abstract

The invention discloses an oil and gas separator, which includes a cylinder. An air inlet pipe extends tangentially from the middle and lower side walls of the cylinder into the cylinder. The lower part of the disc shell is connected to a support shaft, and the upper part is connected to an exhaust port. The exhaust port It is a round tube with steps that can be used for positioning. There are small holes for air intake and oil discharge under the disc housing. The oil and gas mixture coming in from the intake pipe is blown vertically on the grid plate, and the oil and gas mixture entering from the intake hole is blown on the grid plate. The discs flow radially inward. Under the action of centrifugal force, the oil droplets are deposited on the lower surface of the discs, slide downward and outward, and are discharged from the oil drain hole on the disc shell to the oil storage tank in the cylinder. From the oil return hole back to the compressor for recycling, the gas continues to flow toward the center due to the small centrifugal force and is discharged from the exhaust pipe. The invention can efficiently separate oil and gas mixtures, extend the time interval between cleaning and replacing filter elements, effectively separate oil return impurities, prevent oil return pipelines from being clogged, reduce maintenance costs, and improve the reliability of the refrigeration system.

Description

An oil and gas separator

Technical field

The invention belongs to the technical field of compressor oil and gas separation and relates to an oil and gas separator.

Background technique

The separation efficiency of the oil and gas separator is an important indicator for evaluating the performance of the oil injection compressor. Ordinary oil and gas separators use cyclone separation or gravity separation. The primary separation efficiency of this separation method is low, which will cause more damage to the oil filter element. A heavy burden requires frequent replacement of the oil filter element. If lubricating oil enters the circulation system along with the refrigerant, it will form an oil film on the surface of the heat exchanger, reducing the performance of the heat exchanger, and reducing the amount of lubricating oil circulating into the compressor, affecting the life and reliability of the compressor. , how to improve the separation efficiency of oil separators is the most difficult problem facing the market.

Contents of the invention

The object of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide an oil and gas separator that can efficiently separate the oil and gas mixture, extend the time interval between cleaning and replacing the filter element, effectively separate the oil return impurities, prevent the oil return pipeline from being clogged, and reduce maintenance. cost and improves the reliability of the refrigeration system.

In order to achieve the above objectives, the present invention adopts the following technical solutions to achieve:

An oil and gas separator includes a cylinder, a flange end cover is provided at the upper end of the cylinder, and an air inlet pipe is provided on the side wall of the cylinder. The air inlet pipe is tangent to the side wall of the cylinder and extends into the cylinder; the flange end cover An exhaust pipe is installed on the top, and the lower end of the exhaust pipe extends into the cylinder. The lower end of the exhaust pipe is fixedly connected to the disc shell. The lower part of the disc shell is fixedly connected to the support shaft. The support shaft is installed on the cylinder through the lower end bearing. Bottom; the upper side wall of the exhaust pipe is provided with steps for positioning, and is installed on the flange end cover through the upper end bearing; there are air inlets and oil discharge holes under the disc housing, and several grids are installed in the middle and lower parts , the oil and gas mixture coming in from the intake pipe is blown vertically onto the grid plate, driving the disc housing to rotate; there are multiple layers of conical discs inside the disc housing, and the oil and gas mixture entering from the air inlet is blown along the diameter between the conical discs. It flows inward, and under the action of centrifugal force, the oil droplets are deposited on the lower surface of the conical disc, and slide downward and outward. They are discharged from the oil drain hole on the disc shell to the oil storage tank in the cylinder. The oil return hole on the side wall of the cylinder returns to the compressor for recycling, and the gas continues to flow toward the center and is discharged from the exhaust pipe.

Further improvements of the present invention include:

Eight grids are welded to the middle and lower part of the disc housing.

The cylinder body and the flange end cover are connected by bolts, and a sealing ring is set between them; the intake pipe and the cylinder body are welded and fixed together; the top of the disc shell and the lower end of the exhaust pipe are welded together.

The lower part of the disc housing is welded to the support shaft, and the lower end of the support shaft is connected to the lower end bearing; the upper end of the inner ring of the lower end bearing rests on the shoulder of the support shaft, and the lower end is positioned by the lower end circlip.

A piece of felt is provided for sealing between the exhaust pipe and the flange end cover.

The inner ring of the upper bearing is positioned by the shoulder and the upper circlip, and the outer ring of the upper bearing is positioned by the steps of the bearing end cover and the flange end cover. The bearing end cover and the flange end cover are connected by screws.

There are four air inlet holes and four oil drain holes under the disc housing.

The conical discs are welded and fixed by ribs, which are welded to the disc housing; each conical disc has holes at the same position above the air inlet.

The piston on the oil return hole is connected to the spring piece, and the top of the spring piece is connected to the float. When the oil in the oil storage tank continues to increase, the float ball will continue to rise, and finally drive the spring piece to push open the piston on the oil return hole to drain the oil. .

A filter element is installed on the exhaust pipe.

Compared with the prior art, the present invention has the following beneficial effects:

In the present invention, the oil-gas mixture entering from the intake pipe is vertically blown onto the grid plate, driving the entire disc core to rotate at high speed. The oil-gas mixture flows radially inward between the discs, and oil droplets are deposited on the lower surface of the discs under the action of centrifugal force. , and slides downward and outward, and is discharged from the oil drain hole on the disc housing to the oil storage tank in the cylinder. Due to the small centrifugal force, the gas continues to flow toward the center and is discharged from the exhaust pipe. The invention can efficiently separate oil and gas mixtures, extend the time interval between cleaning and replacing filter elements, effectively separate oil return impurities, prevent oil return pipelines from being clogged, reduce maintenance costs, and improve the reliability of the refrigeration system.

Description of drawings

Figure 1 is a schematic front structural view of the oil and gas separator of the present invention;

Figure 2 is a schematic top structural view of the oil and gas separator of the present invention;

Figure 3 is a schematic front structural view of the disc core of the oil and gas separator of the present invention;

Figure 4 is a schematic structural diagram of the disc core of the oil and gas separator of the present invention viewed from above;

Figure 5 is a schematic diagram of oil and gas flow between discs;

Among them: 1-Bolt; 2-Sealing ring; 3-Flange end cover; 4-Bearing end cover; 5-Felt; 6-Upper end circlip; 7-Exhaust pipe; 8-Upper end bearing; 9-Screw; 10 -Cylinder; 11-disc; 12-disc casing; 13-ribs; 14-grid plate; 15-floating ball; 16-spring leaf; 17-oil return hole; 18-lower bearing; 19-support shaft ; 20-lower end circlip; 21-air inlet pipe; 22-disc hole; 23-air inlet hole; 24-oil drain hole; 25-oil storage tank; 26-filter element; a-oil droplets; b-gas.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings:

Referring to Figures 1 and 2, the oil and gas separator of the present invention includes a cylinder 10, a flange end cover 3 provided at the upper end of the cylinder 10, and an air inlet pipe 21 extending tangentially from the middle and lower side walls of the cylinder 10 into the cylinder. It also includes a disc housing 12. The lower part of the disc housing 12 is connected to the support shaft 19, and the upper part is connected to the exhaust pipe 7. The exhaust pipe 7 has steps that can be used for positioning. The lower part of the disc housing 12 has openings for air intake and oil discharge. There are eight grid plates 14 welded to the middle and lower part of the disc casing 12. The oil and gas mixture coming in from the air inlet pipe 21 is vertically blown on the grid plates 14, driving the entire disc core to rotate at high speed. There are many grids 14 arranged in sequence inside the disc casing 12. The conical disc 11 is welded and fixed by ribs 13 and rotates together with the disc housing 12. The oil and gas mixture entering from the air inlet flows radially inward between the conical discs 11. Under the action of centrifugal force, oil droplets (a) are deposited on the lower surface of the conical disc 11, and slide downward and outward, and are discharged from the oil drain hole 24 on the disc housing 12 to the oil storage tank 25 in the cylinder 10. From the oil return hole 17, it is returned to the compressor for recycling. Due to the small centrifugal force, the gas (b) continues to flow toward the center and is discharged from the exhaust pipe 7.

The cylinder 10 and the flange end cover 3 are connected by bolts 1, and a sealing ring 2 is provided between them. The air inlet pipe 21 extends tangentially from the middle and lower side walls of the barrel 10 into the barrel, and the air inlet pipe 21 and the barrel 10 are welded and fixed together. The lower part of the disc housing 12 is welded to the support shaft 19, and the lower end of the support shaft 19 is connected to the lower end bearing 18. The upper end of the inner ring of the lower end bearing 18 rests on the shoulder of the support shaft 19, and the lower end is positioned by the lower end circlip 20.

A felt 5 is provided between the exhaust pipe 7 and the flange end cover 3 for sealing. The top of the exhaust pipe 7 is connected to the upper bearing 8. The inner ring of the upper bearing 8 is positioned by the shaft shoulder and the upper circlip 6 respectively. The outer ring of the upper bearing 8 is positioned by the steps of the bearing end cover 4 and the flange end cover 3. The bearing end The cover 4 and the flange end cover 3 are connected by screws 9.

The annular oil storage tank 25 is the lowest position close to the oil return hole 17. The impurities in the oil-air mixture will settle at the bottom of the oil storage tank 25 due to gravity, and the clean oil returns to the compressor from the oil return hole 17 for recycling.

The piston on the oil return hole 17 is connected to the spring leaf 16, and the top of the spring leaf 16 is connected to a float. When the oil in the oil storage tank 25 continues to increase, the float will continue to rise, and finally drive the spring leaf 16 to open the oil return hole. The piston on 17 drains the oil.

The filter element 26 can be installed on the exhaust pipe 7 as needed. Since the disc element can efficiently separate the oil and gas mixture, the time interval for replacing the filter element is greatly extended.

As shown in Figure 3, the top of the disc housing 12 is welded to the exhaust pipe 7, and the exhaust pipe 7 has steps that can be used for positioning. Eight grid plates 14 are welded along the radial direction in the middle and lower part of the disc housing 12. The gas coming in from the air inlet pipe 21 blows vertically on the grid plates 14, driving the entire disc core to rotate at high speed. Multiple layers of conical discs 11 are arranged inside the disc casing 12. The conical discs 11 are welded and fixed by ribs 13, and the ribs 13 and the disc casing 12 are welded together. Each conical disc 11 has a hole 22 at the same position above the air inlet hole 23 .

As shown in Figure 4, four air inlet holes 23 and four oil discharge holes 24 are opened below the disc housing 12.

As shown in Figure 5, the oil-air mixture entering from the intake pipe 21 enters the disc core through the intake hole 23, enters between each conical disc 11 through the hole 22, and moves radially inward between the conical discs 11. Flow, the oil droplets a are deposited on the lower surface of the conical disc 11 under the action of centrifugal force, and slide downward and outward, and are discharged from the oil drain hole 24 on the disc shell 12 to the oil storage tank 25 in the cylinder 10 , due to the small centrifugal force, gas b continues to flow toward the center and is discharged from the exhaust pipe 7.

The above descriptions are only preferred embodiments of the present invention. The oil-air mixture entering from the intake pipe is vertically blown onto the grid plate, driving the entire disc core to rotate at high speed. The oil-air mixture flows radially inward between the discs. Under the action of centrifugal force, the oil droplets are deposited on the lower surface of the discs, and Sliding downward and outward, the oil drain hole on the disc housing is discharged into the oil storage tank in the barrel. Due to the small centrifugal force, the gas continues to flow toward the center and is discharged from the exhaust pipe. The invention can efficiently separate oil and gas mixtures, extend the time interval between cleaning and replacing filter elements, effectively separate oil return impurities, prevent oil return pipelines from being clogged, reduce maintenance costs, and improve the reliability of the refrigeration system.

The above contents are only for illustrating the technical ideas of the present invention and cannot be used to limit the protection scope of the present invention. Any changes made based on the technical ideas proposed by the present invention and based on the technical solutions shall fall within the scope of the claims of the present invention. within the scope of protection.

Claims (10)

1. The oil-gas separator is characterized by comprising a cylinder body (10), wherein a flange end cover (3) is arranged at the upper end of the cylinder body (10), an air inlet pipe (21) is arranged on the side wall of the cylinder body (10), and the air inlet pipe (21) is tangential to the side wall of the cylinder body (10) and extends into the cylinder body; an exhaust pipe (7) is arranged on the flange end cover (3), the lower end of the exhaust pipe (7) stretches into the cylinder body (10), the lower end of the exhaust pipe (7) is fixedly connected with a disc shell (12), the lower part of the disc shell (12) is fixedly connected with a support shaft (19), and the support shaft (19) is arranged at the bottom of the cylinder body (10) through a lower end bearing (18); the upper side wall of the exhaust pipe (7) is provided with a step for positioning, and the upper side wall is arranged on the flange end cover (3) through an upper end bearing (8); an air inlet hole (23) and an oil discharge hole (24) are formed below the disc shell (12), a plurality of grid plates (14) are arranged at the middle lower part of the disc shell, and an oil-gas mixture entering from the air inlet pipe (21) is vertically blown on the grid plates (14) to drive the disc shell (12) to rotate; the inside of the disc shell (12) is provided with a plurality of layers of conical discs (11), the oil-gas mixture entering from the air inlet holes (23) flows inwards in the radial direction between the conical discs (11), oil drops are deposited on the lower surface of the conical discs (11) under the action of centrifugal force and slide downwards and outwards, the oil drops are discharged into an oil storage tank (25) in the cylinder body (10) from an oil discharge hole (24) on the disc shell (12), return to the compressor from an oil return hole (17) arranged on the side wall of the cylinder body (10) for recycling, and gas continuously flows towards the center and is discharged from the exhaust pipe (7).

2. The oil-gas separator according to claim 1, wherein eight louver plates (14) are welded to the middle lower portion of the disc housing (12).

3. The oil-gas separator according to claim 1, characterized in that the cylinder (10) is connected with the flange end cover (3) by bolts (1) and a sealing ring (2) is arranged between the cylinder and the flange end cover; the air inlet pipe (21) and the cylinder body (10) are welded and fixed together; the upper part of the disc shell (12) is welded with the lower end of the exhaust pipe (7).

4. The oil-gas separator according to claim 1, characterized in that the lower part of the disc housing (12) is welded with a support shaft (19), the lower end of the support shaft (19) is connected with a lower end bearing (18); the upper end of the inner ring of the lower end bearing (18) is abutted against the shaft shoulder of the supporting shaft (19), and the lower end is positioned by the lower end clamp spring (20).

5. An oil and gas separator according to claim 1, characterized in that a felt (5) for sealing is arranged between the exhaust pipe (7) and the flanged end cover (3).

6. The oil-gas separator according to claim 1, wherein the inner ring of the upper end bearing (8) is respectively positioned by a shaft shoulder and an upper end clamping spring (6), the outer ring of the upper end bearing (8) is respectively positioned by steps of the bearing end cover (4) and the flange end cover (3), and the bearing end cover (4) and the flange end cover (3) are connected by a screw (9).

7. The oil-gas separator according to claim 1, characterized in that four air inlet holes (23) and four oil drain holes (24) are opened below the disc housing (12).

8. The oil-gas separator according to claim 1, characterized in that the conical disc (11) is welded and fixed by ribs (13), the ribs (13) being welded with the disc housing (12); each conical disk (11) is provided with a hole (22) at the same position above the air inlet hole (23).

9. The oil-gas separator according to claim 1, wherein the piston on the oil return hole (17) is connected with the spring piece (16), the top end of the spring piece (16) is connected with the floating ball (15), when the oil in the oil storage tank (25) is continuously increased, the floating ball continuously rises, and finally the spring piece (16) is driven to jack the piston on the oil return hole (17) to discharge the oil.

10. An oil and gas separator as claimed in claim 1, characterized in that the exhaust pipe (7) is provided with a filter element (26).