Air-cooled claw pump convenient to maintain and replace and use method of air-cooled claw pump

Abstract

The invention relates to an air-cooled claw pump convenient to maintain and replace and a using method thereof.The air-cooled claw pump comprises a pump body, end shells, end covers, supporting legs, a rotor shaft and a rotor, the two ends of the pump body are open, the end shells are installed at the two ends of the pump body respectively, the end covers are installed on the outer sides of the end shells, and the supporting legs are arranged on the bottom sides of the end shells; two rotor shafts are rotationally installed in the end shell, and two rotors are rotationally installed in a pump cavity of the pump body. The staying time of air in the pump cavity is shortened through graded exhaust, air compression heat is reduced, cooling of the air in the pump cavity is achieved through cooling water circulation in the pump body, cooling and backflow of exhausted air are achieved, the exterior of the rotor is cooled, and cooling of the interior of the rotor and the interior of the rotor shaft are achieved through water circulation in the rotor and the rotor shaft. Therefore, when the pumping rate and the pumping speed of the pump body are increased, clamping damage caused by too large compression heat and rotor heating expansion is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum pumps, and in particular to an air-cooled claw pump which is easy to repair and replace and a method for using the same. Background Art

[0002] With the development of society, the requirements for environmental protection and energy saving are increasing, and the demand for clean vacuum is increasing. The medium-free claw vacuum pump has no pollution to the pumped medium and container, no emission, and can provide a clean vacuum environment; the air-cooled claw pump is a variable-displacement dry vacuum pump with a claw-shaped rotor. The vacuum pump refers to a device or equipment that uses mechanical, physical, chemical or physicochemical methods to evacuate the pumped container to obtain a vacuum.

[0003] The rotor and rotor shaft in the existing air-cooled claw pump are of an integrated structure. Therefore, when loading and unloading, the pump body, end shell and end cover need to be disassembled as a whole. When the air-cooled claw pump is working, the rotor is likely to be damaged. When the rotor is damaged and needs to be replaced, the air-cooled claw pump needs to be disassembled and replaced as a whole, and the rotor and rotor shaft need to be replaced as a whole. The disassembly and maintenance efficiency is low, and the maintenance and replacement cost is high.

[0004] Due to the excessive compression heat and the thermal expansion of the rotor, the air-cooled claw pump has not had a large suction volume product. That is, when the pumping speed is increased, too much heat is generated in the air-cooled claw pump, which is difficult to dissipate in time, causing the rotor to expand due to the increase in compression heat, resulting in the rotor being stuck and damaged. Summary of the invention

[0005] The problem solved by the present invention is to provide an air-cooled claw pump that is easy to repair and replace and a method for using the same, which solves the problem that the rotor and the rotor shaft in the existing air-cooled claw pump are of an integrated structure, so when loading and unloading, the pump body, the end shell and the end cover need to be disassembled and assembled as a whole, and when the air-cooled claw pump is working, the probability of the rotor being damaged is high, and when the rotor is damaged and needs to be replaced, the air-cooled claw pump needs to be disassembled and replaced as a whole, and the rotor and the rotor shaft need to be replaced as a whole, which results in low disassembly and maintenance efficiency and high maintenance and replacement costs;

[0006] Due to reasons such as excessive compression heat and thermal expansion of the rotor, air-cooled claw pumps have not had a large suction volume product. That is, when the pumping speed is increased, too much heat is generated in the air-cooled claw pump, which is difficult to dissipate in time, causing the rotor to expand due to the increase in compression heat, resulting in technical problems such as the rotor getting stuck and damaged.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] An air-cooled claw pump that is easy to repair and replace, comprising a pump body, an end shell, an end cover, a support leg, a rotor shaft and a rotor, both ends of the pump body are open, the two ends of the pump body are respectively installed with end shells, and the outer side of the end shells is installed with end covers, the bottom side of the end shell is provided with support legs, two rotor shafts are rotatably installed inside the end shell, two rotors are rotatably installed in the pump cavity of the pump body, and the two ends of the rotor are respectively plug-connected with the rotor shaft of the end shell, the top side of the pump body is provided with an air inlet, the bottom side of the pump body is provided with an exhaust port, rib walls are horizontally provided at two opposite middle parts of the pump body, and a plurality of first heat dissipation grilles are evenly spaced on the rib walls;

[0009] The pump body is provided with a cooling mechanism for cooling the discharged air and a reflux mechanism for cooling and reflux of the air.

[0010] Preferably, the cooling mechanism comprises a cooling water channel opened inside the rib wall, and two ends of the cooling water channel are respectively connected to a water inlet and a water outlet at two ends of the rib wall.

[0011] Preferably, the reflux mechanism comprises a cooling air inlet nozzle connected to the air inlet, and the cooling air inlet nozzle is connected to a first reflux pipe;

[0012] The reflux mechanism further includes a second reflux pipe connected to the exhaust port, and the first reflux pipe and the second reflux pipe are connected to two ends of the cooling cylinder respectively.

[0013] Preferably, a plurality of second heat sinks are arranged at equal angles on the outside of the cooling tube, a plurality of semiconductor refrigeration plates are installed inside the cooling tube, and the plurality of semiconductor refrigeration plates are connected end to end in a polygonal shape and are located inside the cooling tube, the heat absorbing end of the semiconductor refrigeration plate is in contact with the air in the cooling tube, and the heat releasing end of the semiconductor refrigeration plate is in contact with the inner wall of the cooling tube.

[0014] Preferably, one end of the rotor shaft is connected to the bearing in the end shell, and the outer side of the other end of the rotor shaft is provided with a gear-shaped protrusion, and the inner side of the gear-shaped protrusion is provided with a circular limiting protrusion.

[0015] Preferably, a mounting groove is provided through the middle of the rotor, and the inner wall of the mounting groove is provided with a gear-shaped groove, and the gear-shaped groove is adapted to the gear-shaped protrusion of the rotor shaft, and limiting grooves adapted to the limiting protrusions are provided at both ends of the mounting groove.

[0016] Preferably, a through hole is penetrated through the rotor shaft, and a rotating joint connected to the outer end of the rotor shaft is installed on the outer side of the end cover, wherein the two rotating joints on one of the end covers are connected to the water inlet pipe, and the two rotating joints on the other end cover are connected to the water outlet pipe.

[0017] Preferably, an axial air inlet connected to the pump chamber of the pump body is formed on the inner wall of the end shell, and the axial air inlet is located on the exhaust path of rotor rotation. An axial exhaust port located outside the pump body is formed on the inner wall of the end shell, and the axial exhaust port and the axial air inlet are connected through a gas channel inside the end shell.

[0018] A method for using an air-cooled claw pump that is easy to repair and replace, the specific operating steps of the method are as follows:

[0019] Step 1: Install the rotor shaft in the end shell, and then connect the rotor to the ends of the rotor shaft in the end shell. At this time, the gear-shaped protrusion of the rotor shaft is engaged with the gear-shaped groove of the rotor, and the limiting protrusion is inserted into the limiting groove to achieve sealing of both ends of the installation groove. Then, the two ends of the pump body are connected to the end shell by bolts.

[0020] Step 2: Air enters the pump chamber from the air inlet. During the rotation of the rotor shaft and the rotor, the rotor drives the air to gradually move from the upper part of the pump chamber to the lower part of the pump chamber. When the air passes through the axial air inlet, part of the air is discharged from the axial exhaust port through the gas channel, and the remaining air continues to be compressed and discharged through the exhaust port.

[0021] Step 3: When the air-cooled claw pump is working, the external water pump works to inject cooling water into the water inlet and the water inlet pipe. The cooling water of the water inlet is discharged from the water outlet through the cooling water channel. When the air in the pump cavity is transferred and compressed, the air is cooled. The cooling water of the water inlet pipe enters the through hole of the rotor shaft and the mounting groove of the rotor through the rotary joint to cool the rotor shaft and the inside of the rotor. The cooling water is finally discharged from the rotary joint and the water outlet pipe.

[0022] Step 4: A part of the exhausted air enters the cooling cylinder through the first return pipe. At this time, the semiconductor refrigeration plate works to cool the air entering the cooling cylinder. The cooled air re-enters the pump body through the second return pipe and the cooling cylinder to cool the outside of the rotor.

[0023] The beneficial effects of the present invention are as follows: the rotor shaft and the rotor are installed in a combined manner, the rotor shafts are installed at both ends of the rotor respectively, and the rotor and the rotor shaft are engaged and limited by a gear-shaped protrusion and a gear-shaped groove, so as to ensure the normal rotation of the rotor and the rotor shaft, and when the rotor is worn or damaged by foreign matter, the end shell and the pump body are separated at one end, and then the rotor shaft and the rotor are axially moved to realize the separation of the separated rotor shaft and the rotor, and then the new rotor is axially moved to complete the installation with the rotor shaft, so as to realize the convenient disassembly, replacement and maintenance of the rotor;

[0024] When the two rotors rotate, axial two-way exhaust is achieved through the axial air inlet and axial exhaust port set on the end shell, achieving graded exhaust, improving exhaust efficiency, reducing the residence time of air in the pump cavity, and thus reducing heat accumulation in the pump body;

[0025] By circulating cooling water in the cooling water channel of the rib wall, the air inside the pump body is cooled when the rotor rotates to transfer the air, and the exhaust air is initially cooled;

[0026] Part of the exhausted air enters the cooling cylinder through the first return pipe. At this time, the semiconductor refrigeration plate works to cool the air entering the cooling cylinder. The cooled air re-enters the pump body through the second return pipe and the cooling cylinder to cool the outside of the rotor.

[0027] The cooling water from the water inlet pipe enters the through hole of the rotor shaft and the installation groove of the rotor through the rotary joint. At this time, the gear-shaped groove of the rotor not only meshes with the gear-shaped protrusion, but also increases the contact area with the cooling water, improves the heat exchange efficiency between the cooling water and the inner wall of the rotor, and cools the rotor shaft and the inside of the rotor;

[0028] The residence time of air in the pump chamber is reduced by staged exhaust, and the air compression heat is reduced. The cooling water circulation in the pump body can cool the air in the pump chamber. The outside of the rotor is cooled by cooling and reflux of the exhaust air. The inside of the rotor and the rotor shaft is cooled by water circulation. Therefore, when the pumping volume and speed are increased, the compression heat is too large and the rotor is prevented from getting stuck and damaged due to thermal expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the first structure of the present invention as a whole;

[0030] Figure 2 It is a schematic diagram of the second structure of the present invention as a whole;

[0031] Figure 3 This is a cross-sectional view of the rib wall of the present invention;

[0032] Figure 4 It is a partial cross-sectional view of the end shell of the present invention;

[0033] Figure 5 This is a schematic diagram of the rotor shaft and rotor structure of the present invention;

[0034] Figure 6 It is a schematic diagram of the internal structure of the cooling cylinder of the present invention.

[0035] Legend:

[0036] 1. Pump body; 2. End shell; 3. End cover; 4. Support leg; 5. Rotor shaft; 6. Rotor; 7. Air inlet; 8. Exhaust port; 9. Rib wall; 10. First heat sink; 11. Water inlet nozzle; 12. Water outlet nozzle; 13. Cooling water channel; 14. Cooling air inlet nozzle; 15. First return pipe; 16. Second return pipe; 17. Cooling cylinder; 18. Gear-shaped protrusion; 19. Limiting protrusion; 20. Through hole; 21. Mounting groove; 22. Gear-shaped groove; 23. Limiting groove; 24. Rotary joint; 25. Water inlet pipe; 26. Water outlet pipe; 27. Axial air inlet; 28. Axial exhaust port; 29. ​​Gas channel; 30. Semiconductor refrigeration plate; 31. Second heat sink. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Specific examples are given below.

[0039] See also Figure 1 to Figure 6, an air-cooled claw pump which is easy to repair and replace, comprises a pump body 1, an end shell 2, an end cover 3, a supporting leg 4, a rotor shaft 5 and a rotor 6. Both ends of the pump body 1 are open, and the end shells 2 are respectively installed at both ends of the pump body 1, and the end cover 3 is installed on the outer side of the end shell 2, and the supporting leg 4 is arranged on the bottom side of the end shell 2. Two rotor shafts 5 are rotatably installed inside the end shell 2, and two rotors 6 are rotatably installed in the pump cavity of the pump body 1, and the two ends of the rotor 6 are respectively plugged and connected with the rotor shaft 5 of the end shell 2, one end of the rotor shaft 5 is connected with the bearing in the end shell 2, and the outer side of the other end of the rotor shaft 5 is provided with a gear-shaped protrusion 18, and the inner side of the gear-shaped protrusion 18 is provided with a circular limiting protrusion 19, a mounting groove 21 is opened through the middle of the rotor 6, and the inner wall of the mounting groove 21 is provided with a gear-shaped groove 22, and the gear-shaped groove 22 is adapted to the gear-shaped protrusion 18 of the rotor shaft 5, and limiting grooves 23 adapted to the limiting protrusion 19 are opened at both ends of the mounting groove 21, and the rotor 6 are respectively installed with rotor shafts 5, and the rotor 6 and the rotor shaft 5 are engaged and limited by gear-shaped protrusions 18 and gear-shaped grooves 22 to ensure the normal rotation of the rotor 6 and the rotor shaft 5. When the rotor 6 is worn or damaged by foreign matter, the end shell 2 and the pump body 1 are separated at one end, and then the rotor shaft 5 and the rotor 6 are axially moved to separate the rotor shaft 5 and the rotor 6. A through hole 20 is opened through the rotor shaft 5, and a rotary joint 24 connected to the outer end of the rotor shaft 5 is installed on the outer side of the end cover 3. The two rotary joints 24 on one end cover 3 are connected to the water inlet pipe 25, and the two rotary joints 24 on the other end cover 3 are connected to the water outlet pipe 26. The cooling water of the water inlet pipe 25 enters the through hole 20 of the rotor shaft 5 and the installation groove 21 of the rotor 6 through the rotary joint 24 to cool the inside of the rotor shaft 5 and the rotor 6. The cooling water is finally discharged from the rotary joint 24 and the water outlet pipe 26;

[0040] The other end of the rotor shaft 5 is located in the end shell 2 and is equipped with a slave gear, and the two slave gears are meshed with each other. A reducer is installed on one of the end shells 2. The output end of the reducer is located in the end shell 2 and is equipped with a driving tooth, and the driving tooth is meshed with one of the slave gears. The input end of the reducer is connected to the output end of the motor.

[0041] The top side of the pump body 1 is provided with an air inlet 7, the bottom side of the pump body 1 is provided with an exhaust port 8, two opposite middle parts of the pump body 1 are horizontally provided with rib walls 9, and a plurality of first heat dissipation grilles 10 are evenly spaced on the rib walls 9;

[0042] The pump body 1 is provided with a cooling mechanism for cooling the exhaust air and a reflux mechanism for cooling the air backflow;

[0043] The cooling mechanism includes a cooling water channel 13 opened inside the rib wall 9, and the two ends of the cooling water channel 13 are respectively connected with the water inlet nozzle 11 and the water outlet nozzle 12 at the two ends of the rib wall 9. By circulating cooling water in the cooling water channel 13 of the rib wall 9, the air inside the pump body 1 is cooled when the rotor 6 rotates to transfer the air, and the discharged air is preliminarily cooled;

[0044] The reflux mechanism includes a cooling air inlet 14 connected to the air inlet 7, and a first reflux pipe 15 is connected to the cooling air inlet 14. The reflux mechanism also includes a second reflux pipe 16 connected to the exhaust port 8. The first reflux pipe 15 and the second reflux pipe 16 are respectively connected to the two ends of the cooling tube 17. A plurality of second heat dissipation grids 31 are arranged at equal angles on the outside of the cooling tube 17. A plurality of semiconductor refrigeration plates 30 are installed inside the cooling tube 17, and the plurality of semiconductor refrigeration plates 30 are connected end to end in a polygonal shape and are located in the cooling tube 17. The heat absorbing end of the semiconductor refrigeration plate 30 contacts the air in the cooling tube 17, and the heat releasing end of the semiconductor refrigeration plate 30 contacts the inner wall of the cooling tube 17. A portion of the exhausted air enters the cooling tube 17 through the first reflux pipe 15. At this time, the semiconductor refrigeration plate 30 works to cool the air entering the cooling tube 17. The cooled air re-enters the pump body 1 through the second reflux pipe 16 and the cooling tube 17 to cool the outside of the rotor 6.

[0045] An axial air inlet 27 connected to the pump chamber of the pump body 1 is formed on the inner wall of the end shell 2, and the axial air inlet 27 is located on the rotating exhaust path of the rotor 6. An axial exhaust port 28 located on the outer side of the pump body 1 is formed on the inner wall of the end shell 2, and the axial exhaust port 28 and the axial air inlet 27 are connected through a gas channel 29 inside the end shell 2. The rotor 6 drives the air to gradually move from the top of the pump chamber to the bottom of the pump chamber. When the air passes through the axial air inlet 27, part of the air is discharged from the axial exhaust port 28 through the gas channel 29, and the remaining air continues to be compressed and discharged through the exhaust port 8, thereby realizing graded exhaust, improving exhaust efficiency, reducing the residence time of air in the pump chamber, and thereby reducing heat accumulation in the pump body 1.

[0046] A method for using an air-cooled claw pump that is easy to repair and replace, the specific operating steps of the method are as follows:

[0047] Step 1: Install the rotor shaft 5 in the end shell 2, and then connect the rotor 6 to the ends of the rotor shaft 5 in the end shell 2. At this time, the gear-shaped protrusion 18 of the rotor shaft 5 is engaged with the gear-shaped groove 22 of the rotor 6, and the limiting protrusion 19 is inserted into the limiting groove 23 to achieve sealing of both ends of the installation groove 21. Then, the two ends of the pump body 1 are connected to the end shell 2 by bolts;

[0048] Step 2: Air enters the pump chamber from the air inlet 7. During the rotation of the rotor shaft 5 and the rotor 6, the rotor 6 drives the air to gradually move from the upper part of the pump chamber to the lower part of the pump chamber. When the air passes through the axial air inlet 27, part of the air is discharged from the axial exhaust port 28 through the gas channel 29, and the remaining air continues to be compressed and discharged through the exhaust port 8.

[0049] Step 3: When the air-cooled claw pump is working, the external water pump works to inject cooling water into the water inlet nozzle 11 and the water inlet pipe 25. The cooling water of the water inlet nozzle 11 is discharged from the water outlet nozzle 12 through the cooling water channel 13. When the air in the pump chamber is transferred and compressed, the air is cooled. The cooling water of the water inlet pipe 25 enters the through hole 20 of the rotor shaft 5 and the mounting groove 21 of the rotor 6 through the rotary joint 24, and cools the inside of the rotor shaft 5 and the rotor 6. The cooling water is finally discharged from the rotary joint 24 and the water outlet pipe 26.

[0050] Step 4: A part of the exhausted air enters the cooling cylinder 17 through the first return pipe 15. At this time, the semiconductor refrigeration plate 30 works to cool the air entering the cooling cylinder 17. The cooled air re-enters the pump body 1 through the second return pipe 16 and the cooling cylinder 17 to cool the outside of the rotor 6.

[0051] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An air-cooled claw pump that is easy to repair and replace, characterized in that: The pump body (1) comprises a pump body (1), an end shell (2), an end cover (3), a support leg (4), a rotor shaft (5) and a rotor (6), wherein both ends of the pump body (1) are open, the end shells (2) are respectively installed at the two ends of the pump body (1), and the end cover (3) is installed on the outer side of the end shell (2), the bottom side of the end shell (2) is provided with a support leg (4), two rotor shafts (5) are rotatably installed inside the end shell (2), two rotors (6) are rotatably installed in the pump cavity of the pump body (1), and the two ends of the rotor (6) are respectively plug-connected with the rotor shaft (5) of the end shell (2), the top side of the pump body (1) is provided with an air inlet (7), the bottom side of the pump body (1) is provided with an air outlet (8), and rib walls (9) are horizontally arranged at two opposite middle parts of the pump body (1), and a plurality of first heat dissipation grilles (10) are arranged on the rib walls (9) at equal intervals; The pump body (1) is provided with a cooling mechanism for cooling the discharged air and a reflux mechanism for cooling the air and refluxing it.

2. The air-cooled claw pump that is easy to repair and replace according to claim 1, characterized in that: The cooling mechanism comprises a cooling water channel (13) opened inside the rib wall (9), and two ends of the cooling water channel (13) are respectively connected to a water inlet (11) and a water outlet (12) at two ends of the rib wall (9).

3. The air-cooled claw pump that is easy to repair and replace according to claim 2, characterized in that: The reflux mechanism comprises a cooling air inlet nozzle (14) communicated with the air inlet (7), and a first reflux pipe (15) is connected to the cooling air inlet nozzle (14); The reflux mechanism further comprises a second reflux pipe (16) connected to the exhaust port (8), and the first reflux pipe (15) and the second reflux pipe (16) are respectively connected to two ends of the cooling cylinder (17).

4. The air-cooled claw pump that is easy to repair and replace according to claim 3 is characterized in that: A plurality of second heat dissipation grilles (31) are arranged at equal angles on the outside of the cooling tube (17), a plurality of semiconductor cooling fins (30) are installed inside the cooling tube (17), and the plurality of semiconductor cooling fins (30) are connected end to end in a polygonal shape and are located inside the cooling tube (17), the heat absorbing end of the semiconductor cooling fin (30) is in contact with the air inside the cooling tube (17), and the heat releasing end of the semiconductor cooling fin (30) is in contact with the inner wall of the cooling tube (17).

5. The air-cooled claw pump that is easy to repair and replace according to claim 4, characterized in that: One end of the rotor shaft (5) is connected to a bearing in the end shell (2), and the outer side of the other end of the rotor shaft (5) is provided with a gear-shaped protrusion (18), and the inner side of the gear-shaped protrusion (18) is provided with a circular limiting protrusion (19).

6. The air-cooled claw pump that is easy to repair and replace according to claim 5, characterized in that: A mounting groove (21) is provided through the middle of the rotor (6), and the inner wall of the mounting groove (21) is provided with a gear-shaped groove (22), and the gear-shaped groove (22) is adapted to the gear-shaped protrusion (18) of the rotor shaft (5), and both ends of the mounting groove (21) are provided with limit grooves (23) adapted to the limit protrusions (19).

7. The air-cooled claw pump that is easy to repair and replace according to claim 6, characterized in that: A through hole (20) is formed through the rotor shaft (5), and a rotary joint (24) connected to the outer end of the rotor shaft (5) is installed on the outer side of the end cover (3), wherein two rotary joints (24) on one of the end covers (3) are connected to a water inlet pipe (25), and two rotary joints (24) on the other end cover (3) are connected to a water outlet pipe (26).

8. The air-cooled claw pump that is easy to repair and replace according to claim 7, characterized in that: The inner wall of the end shell (2) is provided with an axial air inlet (27) which is connected to the pump chamber of the pump body (1), and the axial air inlet (27) is located on the rotating exhaust path of the rotor (6). The inner wall of the end shell (2) is provided with an axial exhaust port (28) which is located outside the pump body (1), and the axial exhaust port (28) and the axial air inlet (27) are connected via a gas channel (29) inside the end shell (2).

9. The method for using the air-cooled claw pump that is easy to repair and replace according to claim 8, characterized in that: The specific steps of this method are as follows: Step 1: Install the rotor shaft (5) in the end shell (2), and then connect the rotor (6) to the ends of the rotor shaft (5) in the end shell (2). At this time, the gear-shaped protrusion (18) of the rotor shaft (5) is engaged with the gear-shaped groove (22) of the rotor (6), and the limiting protrusion (19) is inserted into the limiting groove (23) to achieve sealing of the two ends of the installation groove (21). Then, the two ends of the pump body (1) are connected to the end shell (2) by bolts. Step 2: Air enters the pump chamber from the air inlet (7). During the rotation of the rotor shaft (5) and the rotor (6), the rotor (6) drives the air to gradually move from the upper part of the pump chamber to the lower part of the pump chamber. When the air passes through the axial air inlet (27), part of the air is discharged from the axial exhaust port (28) through the gas channel (29), and the remaining air continues to be compressed and discharged through the exhaust port (8). Step 3: When the air-cooled claw pump is working, the external water pump works to inject cooling water into the water inlet nozzle (11) and the water inlet pipe (25). The cooling water of the water inlet nozzle (11) is discharged from the water outlet nozzle (12) through the cooling water channel (13). When the air in the pump chamber is transferred and compressed, the air is cooled. The cooling water of the water inlet pipe (25) enters the through hole (20) of the rotor shaft (5) and the mounting groove (21) of the rotor (6) through the rotary joint (24), and cools the rotor shaft (5) and the inside of the rotor (6). The cooling water is finally discharged from the rotary joint (24) and the water outlet pipe (26); Step 4: A portion of the exhausted air passes through the first return pipe (15) and enters the cooling cylinder (17). At this time, the semiconductor refrigeration plate (30) works to cool the air entering the cooling cylinder (17). The cooled air passes through the second return pipe (16) and the cooling cylinder (17) and re-enters the pump body (1) to cool the outside of the rotor (6).

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