Oil-gas separator of screw air compressor

Abstract

The utility model discloses an oil-gas separator of a screw air compressor, which belongs to the technical field of accessory equipment of air compressors and comprises a barrel, an air inlet pipe is arranged on the outer surface of the barrel, the air inlet direction of the air inlet pipe is arranged along the tangential direction of the barrel, and a flow guide channel is arranged at the outlet end of the air inlet pipe. The flow guide channel is arranged along the inner wall of the barrel body, a plurality of speed reduction partition plates perpendicular to the airflow direction are arranged in the flow guide channel, a plurality of through holes are formed in the speed reduction partition plates, and oil falling ports are formed in the inner wall of the flow guide channel and located at the bottom ends of the speed reduction partition plates. By designing the speed reduction partition plate and the through holes in the speed reduction partition plate, entering oil gas can be decelerated, so that oil drops in the oil gas can be better separated from gas under the conditions of impact and speed reduction, the oil-gas separation efficiency is improved, the oil drops adsorbed on the filter element are reduced, the service life of the filter element is prolonged, and the oil gas is blocked by the speed reduction and flow guide channels, so that the oil gas is prevented from being blocked. Oil gas can be prevented from directly impacting the filter element.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-gas separators for screw air compressors, in particular to an oil-gas separator for a screw air compressor. Background Art

[0002] Air compressor oil and gas separation is the air compressor. The air compressor is the core equipment of the pneumatic system that provides air source power and is the main body of the electromechanical air source device. It is a device that converts the mechanical energy of the prime mover (usually an electric motor) into gas pressure energy. It is a compressed air air pressure generating device. In the mechanical field and various production, decoration, and manufacturing fields, the application of air compressor oil and gas separation is very extensive. It is the source power for driving pneumatic tools. In the prior art, the oil mist discharged from the oil discharge hole of the air compressor oil and gas separation needs to be discharged through the oil and gas separation tank to intercept the oil droplets in the oil mist and discharge the gas to achieve oil and gas separation. The intercepted oil flows back to the oil inlet hole of the air compressor oil and gas separation to achieve oil recovery and reuse. The discharged gas does not contain oil and avoids air pollution.

[0003] After the oil and gas enter the traditional oil and gas separation tank, the oil droplets with larger diameters are separated from the gas by the oil droplets' own gravity and centrifugal force, and then the oil and gas separation filter element is used for fine separation. The separation efficiency is low. After the oil and gas separation filter element is used for a short period of time, a large amount of oil will be adsorbed on it. The oil and gas separation filter element needs to be replaced frequently to ensure clean gas. In addition, there is a defect that the oil and gas mixture will cause impact damage to the oil and gas separation element when entering the separation tank. Utility Model Content

[0004] In order to overcome the defects of the prior art, the technical problem to be solved by the utility model is to propose an oil-gas separator for a screw air compressor, so as to improve the separation efficiency and reduce the impact damage of gas on the oil-gas separation filter element.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides an oil-gas separator for a screw air compressor, comprising a cylinder, an air inlet pipe is provided on the outer surface of the cylinder, the air inlet direction of the air inlet pipe is arranged along the tangent direction of the cylinder, a guide channel is provided at the outlet end of the air inlet pipe, the guide channel is arranged along the inner wall of the cylinder, a plurality of deceleration baffles perpendicular to the air flow direction are arranged in the guide channel, a plurality of through holes are opened on the deceleration baffles, and an oil drop port is opened on the inner wall of the guide channel and at the bottom end of the deceleration baffle.

[0007] An optimal technical solution of the utility model is that the cross section of the flow guide channel is arc-shaped, and one side of the flow guide channel is fixedly connected to the inner wall of the cylinder.

[0008] An optimal technical solution of the utility model is that the through holes on adjacent deceleration baffles are staggered in vertical direction.

[0009] An optimal technical solution of the utility model is that an oil guide plate is provided below the oil drop port, and the oil guide plate is inclined downward along the air flow direction.

[0010] An optimal technical solution of the utility model is that the surface of the deceleration baffle is coated with an oleophilic coating.

[0011] The preferred technical solution of the utility model is:

[0012] The beneficial effects of the utility model are:

[0013] The utility model provides an oil-gas separator for a screw air compressor, in which the air intake direction of the air intake pipe is arranged along the tangent direction of the cylinder body, and the guide channel can make the incoming airflow centrifugal, which is beneficial to the separation of the oil-gas mixture, and by designing a deceleration baffle and the through holes thereon, the incoming oil and gas can be decelerated, so that the oil droplets in the oil and gas can be better separated from the gas under the conditions of collision and deceleration, thereby improving the oil-gas separation efficiency, thereby reducing the oil droplets adsorbed on the filter element, extending the service life of the filter element, and the oil and gas can be prevented from directly impacting the filter element by being blocked by the deceleration and guide channels. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the oil-gas separator of the screw air compressor provided by the specific implementation mode of the utility model;

[0015] Figure 2 It is a cross-sectional view of an oil-gas separator for a screw air compressor provided by a specific embodiment of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the flow guide channel provided by a specific embodiment of the utility model;

[0017] Figure 4 It is a cross-sectional view of a flow guide channel provided in a specific embodiment of the utility model;

[0018] In the figure:

[0019] 1. Cylinder; 2. Air inlet pipe; 3. Diversion channel; 4. Speed ​​reduction baffle; 5. Through hole; 6. Oil drop port; 7. Notch; 8. Oil guide plate. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0021] As shown in the figure, this embodiment provides an oil-gas separator for a screw air compressor, including a cylinder 1, an air inlet pipe 2 is provided on the outer surface of the cylinder 1, and the air inlet direction of the air inlet pipe 2 is arranged along the tangential direction of the cylinder 1, so that the oil-gas mixture entering can form a rotating flow. The rotating flow helps the oil droplets to separate from the gas under the action of centrifugal force. A guide channel 3 is provided at the outlet end of the air inlet pipe 2 to ensure that the airflow can smoothly enter the cylinder 1 along the tangential direction and form a stable vortex flow in the cylinder 1, thereby improving the oil-gas separation effect. The guide channel 3 is arranged along the inner wall of the cylinder 1, and a plurality of deceleration baffles 4 perpendicular to the airflow direction are provided in the guide channel 3, and a plurality of through holes 5 are opened on the deceleration baffle 4. After the oil and gas enter the cylinder 1, they flow along the guide channel 3 and collide with the deceleration baffle 4, thereby reducing the flow rate of the oil-gas mixture. By reducing the flow rate, sufficient time can be provided for the sedimentation of the oil droplets, thereby further improving the separation effect;

[0022] An oil drop port 6 is provided on the inner wall of the guide channel 3 and at the bottom end of the deceleration baffle 4. After the oil and gas collide with the deceleration baffle 4, the oil droplets therein will gather on the deceleration baffle 4, flow downward along the deceleration baffle 4, and flow into the bottom of the cylinder 1 through the oil drop port 6.

[0023] Specifically, when the oil and gas enter the cylinder 1 from the inlet pipe, the air flow velocity decreases due to the sudden expansion, and the larger oil droplets are separated from the gas under the action of gravity and fall, while the smaller oil droplets and oil mist rotate tangentially along the guide channel 3. The centrifugal force throws the heavier oil droplets to the inner wall of the cylinder 1. After the oil droplets are coalesced, they flow down along the inner wall of the cylinder 1 under the action of gravity. The lighter oil droplets collide with the deceleration baffle 4 and gather on the deceleration baffle 4, and flow downward along the deceleration baffle 4, and then drip to the bottom of the cylinder 1 through the oil drop port 6 below. After the oil and gas are decelerated by the deceleration baffle 4, the oil and gas are prevented from causing impact damage to the oil and gas separation core.

[0024] The cross section of the guide channel 3 is an arc shape, and one side of the guide channel 3 is fixedly connected to the inner wall of the cylinder 1. After the oil and gas enter the cylinder 1, they rotate along the guide channel 3 to generate centrifugation, so that the oil droplets are thrown to the inner wall of the cylinder 1 or hit the inner wall of the guide channel 3, and then flow down along the inner wall of the guide channel 3 and the inner wall of the cylinder 1. The guide channel 3 is set in an arc shape to ensure that the oil droplets can gather at the lowest oil drop port 6 to prevent the oil droplets from being taken away by the gas again.

[0025] The bottom of the guide channel 3 near the outlet end of the air inlet pipe 2 is provided with a notch 7. After the oil and gas enter the cylinder 1 and expand and decelerate, the larger oil droplets separate from the gas under the action of gravity and fall through the notch 7 to the bottom of the cylinder 1.

[0026] The through holes 5 on the adjacent deceleration baffles 4 are arranged in an up-down staggered manner. When the oil and gas pass through the through holes 5 of the preceding deceleration baffle 4, they will hit the following deceleration baffle 4, thereby improving the separation efficiency.

[0027] An oil guide plate 8 is provided below the oil drop port 6, and the oil guide plate 8 is tilted downward along the airflow direction, so as to ensure that the oil droplets quickly flow out of the guide channel 3 along the oil guide plate 8, thereby preventing the oil droplets from being brought into the airflow for a second time.

[0028] The surface of the deceleration baffle 4 is coated with an oleophilic coating. The oleophilic coating can be polytetrafluoroethylene (PTFE) or other materials with excellent oleophilic properties, which ensures that oil droplets can be quickly attached and separated from the deceleration baffle 4, enhances its adsorption capacity for oil droplets, and improves the effect of oil-gas separation. In addition, this coating also helps prevent the accumulation of oil droplets on the deceleration baffle 4, maintaining the long-term stable operation of the equipment.

[0029] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention.

Claims

1. An oil-gas separator for a screw air compressor, characterized in that: The invention comprises a cylinder (1), an air intake pipe (2) is arranged on the outer surface of the cylinder (1), the air intake direction of the air intake pipe (2) is arranged along the tangent direction of the cylinder (1), a guide channel (3) is arranged at the outlet end of the air intake pipe (2), the guide channel (3) is arranged along the inner wall of the cylinder (1), a plurality of deceleration baffles (4) perpendicular to the air flow direction are arranged in the guide channel (3), a plurality of through holes (5) are opened on the deceleration baffles (4), and an oil drop port (6) is opened on the inner wall of the guide channel (3) and at the bottom end of the deceleration baffle (4).

2. The screw air compressor oil-gas separator according to claim 1, characterized in that: The cross section of the flow guiding channel (3) is in the shape of an arc, and one side of the flow guiding channel (3) is fixedly connected to the inner wall of the cylinder (1).

3. The screw air compressor oil-gas separator according to claim 2, characterized in that: A notch (7) is provided at the bottom of the flow guide channel (3) near the outlet end of the air inlet pipe (2).

4. The oil-gas separator for a screw air compressor according to claim 1 or 3, characterized in that: The through holes (5) on the adjacent deceleration baffles (4) are arranged in an up-and-down staggered manner.

5. The oil-gas separator for a screw air compressor according to claim 4, characterized in that: An oil guide plate (8) is provided below the oil drop port (6), and the oil guide plate (8) is inclined downward along the air flow direction.

6. The screw air compressor oil-gas separator according to claim 5, characterized in that: The surface of the deceleration baffle (4) is coated with an oleophilic coating.

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