A disc type centrifugal oil mist separator

Abstract

A disc-type centrifugal oil mist separator includes a housing, a stator, a rotor, a sealing flange, a dust-proof exhaust port, and an air intake connector. The flange edge on the stator is limited in an annular groove on the housing, and the stator is fixed in the housing through the sealing flange. The rotor is arranged in the stator and can rotate in the stator. The inner wall of the stator is provided with a notch, and the notch is connected to the oil discharge port arranged on the sealing flange. The housing is provided with a through hole. The dust-proof exhaust port is installed on the housing and connected to the inside of the housing. The air intake connector is installed on the sealing flange and is connected to the inside of the housing. The present invention realizes rapid and effective separation of oil mist through blade rotation centrifugal separation and collision separation through the circuitous maze-like channel formed between the umbrella-shaped rotating disc and the disc, especially the dual power input drive rotor, which is practical for different working conditions, pure mechanical separation, no filter element material, and reduces labor and material costs.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical equipment, and in particular to a disc-type centrifugal oil mist separator that can be driven in a dual-power mode. Background Art

[0002] In various rotating equipment such as compressors, fans, vacuum pumps, reduction gearboxes, machine tools and other running parts, oil lubrication is required, especially for high-speed running equipment. Usually, the lubricating oil is formed into circulating oil or oil mist through the oil pump, or mixed with compressed air to form oil gas to enter the lubrication point, lubricate the high-speed running parts such as bearings, gears and other friction pairs, take away the heat, and make the parts run reliably for a long time. The injected oil and oil mist further form finer particles of oil mist under the centrifugal force of the high-speed rotating parts, and the friction heat taken away increases the temperature of the oil, forming oil vapor, which intensifies the oil atomization. The oil vapor accumulates in the oil tank, the temperature and pressure increase, and it looks for an outlet to escape. There are two ways for oil-free compressors, fans and other equipment to escape. One is to go inward, enter the conveying cavity through the labyrinth seal, and reach the downstream pipeline with the airflow. The oil-containing gas pollutes the conveyed materials such as flour, milk powder, medicines and other materials that need to be absolutely clean and oil-free. The second is to go outward, escape through the extended shaft seal and emit to the atmosphere, and continue to be sucked into the equipment to pollute the downstream, or dispersed in the air and inhaled by people, forming aerosol pollution, affecting personal health, and also causing a reduction in oil volume and the need for continuous oil replenishment. The oil diffused in the air will also fall on the ground to form a slippery road surface that affects walking safety. The existing treatment method is passive treatment technology, that is, simply opening a hole to install a filtering facility, so that the oil mist is filtered and discharged directly into the atmosphere. The advantage of this method is simplicity, and the disadvantage is that it cannot guarantee that the oil mist will not enter the conveying cavity and pollute the downstream products with the airflow, especially when the air pressure in the conveying cavity is lower than the atmosphere. Because it is passive and unpowered, the filtration is coarse filtration, and the oil mist entering the atmosphere is still large, and the effect is limited. The second is active treatment technology, that is, adding a fan at the front or back end of the oil mist filter at the outlet to provide power, so that the oil vapor has the power to pass through the finer filter, intercepting the finer oil mist particles, and the gas enters the atmosphere through the filter, achieving cleaner emissions. The advantages of this technology are clean emissions and high filtration accuracy, but the disadvantages are that it requires high power consumption, and there are filter consumables that need to be replaced regularly. Summary of the invention

[0003] In view of the above problems, the purpose of the present invention is to provide a disc-type centrifugal oil mist separator that can be driven by a dual-power mode. The oil mist enters the separator through the air inlet joint, and is continuously thrown onto the inner wall of the stator by the rotor blades to form oil droplets. The oil droplets are then subjected to secondary sedimentation through the maze channel formed by the rotor butterfly blades and the stator spacers. Finally, the separated oil is collected through the oil accumulation port and flows back to the oil tank. The separator has a simple structure, good separation effect, and is easy to install and maintain.

[0004] The technical scheme adopted by the present invention is: a disc-type centrifugal oil mist separator, comprising a cover shell, a stator, a rotor, a sealing flange, a dust-proof exhaust port, and an air intake joint, wherein the flange edge on the stator is limited in an annular groove on the cover shell, and the stator is fixed in the cover shell by the sealing flange, the rotor is arranged in the stator and can rotate in the stator, the inner wall of the stator is provided with a notch, the notch is communicated with the oil discharge port arranged on the sealing flange, the cover shell is provided with a through hole, the sealing flange is provided with a center hole, the through hole is concentric with the center hole, the rotor rotation center is provided with a drive shaft connecting hole, the dust-proof exhaust port is installed on the cover shell and communicated with the inside of the cover shell, the air intake joint is installed on the sealing flange and is conducted with the inside of the cover shell, and is characterized in that: the stator comprises a left stator and a right stator, the left stator and the right stator have the same structure, both are 180° rotating body structures, and the left stator and the right stator become a complete 360° rotating body structure after being combined.

[0005] As a preferred solution, umbrella-shaped rotating plates are evenly spaced and arranged in the height direction of the inner side walls of the left stator and the right stator.

[0006] As a preferred embodiment, the umbrella-shaped rotating piece has a beveled edge close to the inner wall of the stator and a straight edge away from the inner wall. Specifically, the angle between the beveled edge and the outer surface of the flange edge is 15°-30°, and the straight edge is perpendicular to the center of rotation.

[0007] As a preferred solution, blades are arranged in the circumferential direction of the front end of the rotor.

[0008] As a preferred solution, discs are evenly spaced in the circumferential direction at the rear end of the rotor.

[0009] As a preferred solution, a circuitous maze-like passage is formed between the umbrella-shaped rotating plate and the disc.

[0010] As a preferred solution, the center hole is the first power shaft input hole, and the through hole is the second power shaft input hole. When the center hole is used as the first power shaft input hole, the second power shaft input hole is closed; when the through hole is used as the second power shaft input hole, the first power shaft input hole is closed.

[0011] The present invention realizes rapid and effective separation of oil mist through centrifugal separation by blade rotation and collision separation by forming a circuitous maze-like channel between the umbrella-shaped rotating blade and the disc. In particular, the dual-power input drive rotor can be applied to different working conditions, with pure mechanical separation, no filter element material, no consumables, no actual maintenance work, and reduced labor and material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1is a full cross-sectional view of the oil mist separator of the present invention;

[0013] Figure 2 is a schematic diagram of a stator of the present invention;

[0014] Figure 3 This is a front view of the rotor of the present invention;

[0015] Figure 4 It is a right side view of the rotor of the present invention;

[0016] Figure 5 It is a schematic diagram of the internal flow of the oil mist separator of the present invention;

[0017] Figure 6 yes Figure 5 Partial magnified image;

[0018] Figure 7 This is a schematic diagram of the first power connection method adopted by the present invention;

[0019] Figure 8 yes Figure 7 Exploded diagram of

[0020] Fig. 9 This is a schematic diagram of the second power connection method.

[0021] In the figure: 1 housing, 11 annular groove, 12 through hole, 121 through hole cover, 2 stator, 21 left stator, 22 right stator, 23 flange edge, 24 notch, 25 umbrella-shaped rotating piece, 3 rotor, 31 drive shaft connecting hole, 32 blade, 33 disc, 4 sealing flange, 41 oil outlet, 42 center hole, 421 center hole cover, 5 dust-proof exhaust port, 6 air intake joint, 7 first power shaft, 8 second power shaft. DETAILED DESCRIPTION

[0022] Further description is given according to the accompanying drawings. Figures 1 to 9 A schematic diagram of a disc-type centrifugal oil mist separator is known, comprising a cover shell 1, a stator 2, a rotor 3, a sealing flange 4, a dust-proof exhaust port 5, and an air inlet joint 6. The flange edge 23 on the stator 2 is limited in the annular groove 11 on the cover shell 1, and the stator 2 is fixed in the cover shell 1 through the sealing flange 4. The rotor 3 is arranged in the stator 2 and can rotate in the stator 2. The inner wall of the stator 2 is provided with a notch 24, and the notch 24 is connected to an oil discharge port 41 provided on the sealing flange 4. A through hole 12 is provided on the cover shell 1, and a center hole 42 is provided on the sealing flange 4. The through hole 12 is concentric with the center hole 42. A drive shaft connecting hole 31 is provided at the rotation center of the rotor 3. The dust-proof exhaust port 5 is installed on the cover shell 1 and is connected to the inside of the cover shell 1. The air inlet joint 6 is installed on the sealing flange 4 and is connected to the inside of the cover shell 1.

[0023] Specifically, the stator 2 includes a left stator 21 and a right stator 22. The left stator 21 and the right stator 22 have the same structure, both of which are 180° rotating body structures. The left stator 21 and the right stator 22 become a complete 360° rotating body structure after being combined.

[0024] Furthermore, umbrella-shaped rotating pieces 25 are evenly spaced in the height direction of the inner walls of the left stator 21 and the right stator 22. The umbrella-shaped rotating pieces 25 are beveled edges close to the inner wall of the stator 2 and are straight edges away from the inner wall. Specifically, the angle between the beveled edges and the outer surface of the flange edge 23 is 15°-30°, and the straight edges are perpendicular to the rotation center of the stator 2. Blades 32 are provided in the circumferential direction of the front end of the rotor 3, and discs 33 are evenly spaced in the circumferential direction of the rear end of the rotor 3. A circuitous maze-like passage is formed between the umbrella-shaped rotating pieces 25 and the discs 32.

[0025] Specific working process of oil mist separator:

[0026] The oil mist of the equipment enters the stator 2 from the air inlet joint 6. Since the rotor 3 rotates at a high speed under the drive of external power, the blades 32 rotate at a high speed. The oil mist passing through the rotating area of ​​the blades 32 constantly collides with the blades 32 and is thrown onto the inner wall of the stator 2 by the blades 32 to form oil droplets. The oil droplets flow out from the slot 24 and finally return to the oil tank through the oil discharge port 41. The oil mist continues to pass through the circuitous maze-like channel formed between the umbrella-shaped rotating piece 25 and the disc 32. The oil mist passing through the channel is further centrifugally thrown out by the multi-layer discs 32. The thrown oil droplets reach the inner wall of the stator 2 along the oblique edge of the umbrella-shaped rotating piece 25. Finally, the oil droplets flow out from the slot 24 and return to the oil tank from the oil discharge port 41. Finally, the separated oil mist gas is discharged through the dust-proof exhaust port 5.

[0027] Depend on Figure 7 , Figure 8 It is known that this is the first power input mode of the present invention. This input mode is mechanical coaxial transmission. Specifically, when there is an output shaft interface inside the compressor or the fan, it is installed at the corresponding position of the compressor or the fan through the sealing flange 4. The output shaft of the compressor or the fan is connected to the first power shaft 7. The first power shaft 7 passes through the drive shaft connecting hole 31 of the rotor 3 and is fixed. The through-hole cover plate 121 is covered to prevent oil mist from leaking from the through hole 12. At this time, the first power shaft 7 is driven by the output shaft inside the equipment, does not require external power, is integrated with the equipment itself, eliminates external power, and has a compact structure.

[0028] In particular, the higher the speed of the blades of the rotor 3, the better the effect. Generally, the speed of the compressor or fan is usually 4000-15000rpm. The mechanical coaxial transmission oil mist separator can achieve a better effect according to the speed of the compressor or fan, and is not affected by the change of speed. This is because the higher the speed of the compressor or fan, the more oil mist is generated, the stronger the atomization effect, the finer the particles, and the more heat is generated. The higher the temperature, the easier it is for the oil to evaporate and form oil vapor. At this time, the speed of the oil mist separator is also higher, and the separation effect is also better. When the speed of the compressor or fan decreases, the amount of oil mist generated will also decrease. Although the speed of the oil mist separator decreases, the treatment effect remains unchanged.

[0029] Depend on Fig. 9 It is known that this is the second power input method of the present invention. Specifically, when there is no output shaft interface inside the equipment, through external power input, such as high-speed motor power, after the motor is fixed, the motor is connected to the second power shaft 8, the second power shaft passes through the through hole 12 and the drive shaft connecting hole 31 of the rotor 3 and is fixed, and the center hole cover plate 421 is covered to prevent oil mist from leaking from the center hole 42. At this time, the external power motor drives the rotor 3 to rotate to separate the oil mist.

[0030] The present invention is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. These changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A disc-type centrifugal oil mist separator, comprising a housing (1), a stator (2), a rotor (3), a sealing flange (4), a dust-proof exhaust port (5), and an air inlet joint (6), wherein the flange edge (23) on the stator (2) is limited in an annular groove (11) on the housing (1), and the stator (2) is fixed in the housing (1) through the sealing flange (4), the rotor (3) is arranged in the stator (2) and can rotate in the stator (2), and the inner wall of the stator (2) is provided with a notch (24), and the notch (24) The housing (1) is provided with a through hole (12), the rotation center of the rotor (3) is provided with a drive shaft connection hole (31), the sealing flange (4) is provided with a center hole (42), the through hole (12) and the center hole (42) are concentric, the dust-proof exhaust port (5) is mounted on the housing (1) and is communicated with the interior of the housing (1), the air inlet joint (6) is mounted on the sealing flange (4) and is communicated with the interior of the housing (1), and is characterized in that: The stator (2) comprises a left stator (21) and a right stator (22), the left stator (21) and the right stator (22) having the same structure, both being 180° rotating body structures, and the left stator (21) and the right stator (22) being combined to form a complete 360° rotating body structure; The inner side walls of the left stator (21) and the right stator (22) are provided with umbrella-shaped rotating plates (25) evenly spaced in the height direction; The umbrella-shaped rotating piece (25) is a beveled edge close to the inner wall of the stator (2) and a straight edge away from the inner wall, the angle between the beveled edge and the outer surface of the flange edge (23) is 15°-30°, and the straight edge is perpendicular to the center of rotation; The front end of the rotor (3) is provided with blades (32) in the circumferential direction; The rear end of the rotor (3) is provided with discs (33) evenly spaced in a circumferential direction.

2. A disc-type centrifugal oil mist separator according to claim 1, characterized in that: A circuitous maze-like passage is formed between the umbrella-shaped rotating plate (25) and the disc (33).

3. The disc-type centrifugal oil mist separator according to claim 1, characterized in that: The center hole (42) is the first power shaft input hole, and the through hole (12) is the second power shaft input hole. When the center hole (42) is used as the first power shaft input hole, the second power shaft input hole is closed; when the through hole (12) is used as the second power shaft input hole, the first power shaft input hole is closed.

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