A magnetic levitation two-stage centrifugal compressor

Abstract

The present invention discloses a magnetic levitation two-stage centrifugal compressor, which relates to the technical field of centrifugal compressors. The present invention includes a first-stage chamber and a second-stage chamber. A communication chamber is provided between the first-stage chamber and the second-stage chamber. The first-stage chamber communicates with the communication chamber. A cooling and guiding pipe is fixedly connected between the communication chamber and the second-stage chamber. An air inlet pipe is fixedly installed on the first-stage chamber, and an exhaust pipe is fixedly installed on the second-stage chamber. It further includes: a first-stage shaft is rotatably installed on the first-stage chamber through a magnetic levitation bearing, a second-stage shaft is rotatably installed on the second-stage chamber through a magnetic levitation bearing, and a first-stage impeller is fixedly installed at one end of the first-stage shaft located in the first-stage chamber. The advantages are as follows: The present invention can automatically control the opening and closing of the air inlet channels of the first-stage chamber and the second-stage chamber and the connection relationship between the first-stage shaft and the second-stage shaft according to the gas flow rate and pressure changes in the centrifugal compressor, effectively reducing the possibility of surging and the overall operating power consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifugal compressors, and particularly to a magnetic levitation two-stage centrifugal compressor. Background Art

[0002] A centrifugal compressor is a device that converts mechanical energy into gas pressure energy through a high-speed rotating impeller, and is widely used in fields such as energy, petrochemical, and refrigeration. When a traditional mechanical bearing centrifugal compressor is in use, due to mechanical contact and friction, there is a problem of high power consumption. Therefore, a magnetic levitation centrifugal compressor has emerged on the market. It suspends the rotor through a magnetic field to achieve a running mode without mechanical contact and friction, and has lower running power consumption. In some scenarios that require high pressure and stable output, a two-stage centrifugal compressor can effectively reduce the gas overheating phenomenon during the compression process with a lower single-stage compression ratio, thereby further reducing energy consumption.

[0003] During the use of the existing two-stage centrifugal compressor, due to multi-stage compression and a complex pipeline system, it is more likely to have a surge phenomenon due to changes in gas flow rate, resulting in mechanical noise and strong vibration inside the machine, and accelerating the damage of bearings and seals. In severe cases, it may cause resonance of pipelines, machines, and foundations, leading to equipment damage. At present, the measures to reduce the surge phenomenon of the two-stage centrifugal compressor mostly control the intake air flow rate, and cannot control the pressure of the primary gas entering the secondary compression space, so there is still a possibility of surge occurrence. At the same time, the reduction of the intake air flow rate is mostly caused by the blockage of the air filter, and the current two-stage centrifugal compressor cannot automatically clean the air filter when the intake air flow rate decreases. Therefore, the surge problem caused by the reduction of the intake air flow rate cannot be fundamentally solved, so it is necessary to design a magnetic levitation two-stage centrifugal compressor. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a magnetic levitation two-stage centrifugal compressor, which solves the problems raised in the above background art.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A magnetic levitation two-stage centrifugal compressor includes a primary chamber and a secondary chamber. A communication chamber is provided between the primary chamber and the secondary chamber. The primary chamber communicates with the communication chamber. A cooling guide pipe is fixedly connected between the communication chamber and the secondary chamber. An intake pipe is fixedly installed on the primary chamber, and an exhaust pipe is fixedly installed on the secondary chamber. It further includes:

[0007] A primary shaft is rotatably installed on the primary chamber through a magnetic levitation bearing, and a secondary shaft is rotatably installed on the secondary chamber through a magnetic levitation bearing. One end of the primary shaft located in the primary chamber is fixedly installed with a primary impeller, and one end of the secondary shaft located in the secondary chamber is fixedly installed with a secondary impeller;

[0008] A clutch assembly, which is installed between a primary shaft and a secondary shaft, and is used to control the transmission from the primary shaft to the secondary shaft.

[0009] A connecting valve is fixedly installed at one end of the cooling guide pipe close to the communication chamber. An anti-surge component is installed on the connecting valve, and the anti-surge component is used to make the gas pressure in the primary chamber enter the secondary chamber unidirectionally when it reaches a threshold value, and at the same time control the operation of the clutch assembly.

[0010] Further, the clutch assembly is composed of a connecting disc, a fixing rod, a contact disc and a rotating ring. The connecting disc is fixedly installed on the primary shaft, the fixing rod is fixedly installed on the secondary shaft, the contact disc is slidably arranged left and right on the fixing rod, and the contact disc cooperates with the connecting disc. The rotating ring is rotatably installed at one end of the contact disc away from the connecting disc.

[0011] Further, a plurality of sliders are fixedly installed on the inner wall of the contact disc near one end of the secondary shaft. A plurality of sliding grooves slidably matched with the corresponding sliders are formed on the side wall of the fixing rod, and a spring is installed between each sliding groove and the corresponding slider.

[0012] Further, the anti-surge component is composed of an air inlet hole, a sealing plug, a fixing ring, a sliding rod and a tension spring. The air inlet hole is formed on the connecting valve. The sealing plug is slidably installed in a sealed manner at one end of the air inlet hole away from the communication chamber. The fixing ring is fixedly installed on the sealing plug. A plurality of sliding rods are fixedly installed on the fixing ring. A plurality of sliding holes slidably matched with the corresponding sliding rods are formed on the connecting valve. A plurality of tension springs are installed between the fixing ring and the connecting valve.

[0013] Further, one end of the air inlet hole close to the communication chamber is funnel-shaped. The depth of the sliding hole is greater than the depth of the air inlet hole. One ends of the primary shaft and the secondary shaft close to each other are tapered.

[0014] Further, a connecting rod is fixedly installed at one end of the sealing plug close to the communication chamber, and a special-shaped block matched with the rotating ring is fixedly installed on the connecting rod.

[0015] Further, an air filter is installed on the intake pipe. A filter plate and a mounting frame are fixedly installed in the air filter. A rotating rod is rotatably installed on the mounting frame. A shielding plate is fixedly installed at one end of the rotating rod close to the intake pipe. A dust removal seat is fixedly installed at the other end of the rotating rod. A dust suction port is formed at one end of the dust removal seat close to the filter plate.

[0016] Further, a motor and a fixed sleeve are fixedly installed on the mounting frame. An air extraction fan blade is rotatably installed in the fixed sleeve through a rotating shaft, and the rotating shaft is fixedly connected to the output end of the motor. The rotating shaft is fixedly connected to a rotating rod. One end of the fixed sleeve close to the dust removal seat is rotatably installed in a sealed manner with a sealing plate, and a connecting pipe is fixedly communicated between the sealing plate and the dust removal seat. A one-way air outlet hole is opened at one end of the fixed sleeve away from the sealing plate.

[0017] Further, a driving device matched with the first-stage shaft is fixedly installed on the side wall of the first-stage chamber. An installation sleeve is fixedly installed on the cooling guide pipe, and a first switch and a second switch are fixedly installed in the installation sleeve. The first switch is electrically connected to the driving device, the second switch is electrically connected to the motor, and a touch rod matched with the first switch and the second switch is fixedly installed at one end of the fixed ring away from the connecting rod.

[0018] Compared with the existing technology, the advantages of the present invention are as follows:

[0019] 1: Through the design of the anti-surge component, when the gas compression pressure in the first-stage chamber is relatively low, the air intake channels between the first-stage chamber and the second-stage chamber are automatically closed, thereby avoiding the surge problem caused by large gas flow changes and gas reflux between the two stages, and effectively improving the operation stability of the centrifugal compressor.

[0020] 2: Through the cooperation of the first-stage shaft, the second-stage shaft and the clutch component, the connection relationship between the first-stage shaft and the second-stage shaft can be automatically controlled according to the gas flow and pressure changes in the centrifugal compressor, achieving the effects of reducing power consumption and further avoiding surges.

[0021] 3: Through the cooperation of the dust removal seat, the fixed sleeve and the baffle plate, the dust and impurities on the filter plate can be automatically cleaned according to the operation of the anti-surge component, effectively avoiding the problem of insufficient air intake flow caused by filter plate blockage, and further reducing the possibility of surges.

[0022] In summary, the present invention can automatically control the opening and closing of the air intake channels between the first-stage chamber and the second-stage chamber and the connection relationship between the first-stage shaft and the second-stage shaft according to the gas flow and pressure changes in the centrifugal compressor, effectively reducing the possibility of surges and the overall operation power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a magnetic levitation two-stage centrifugal compressor proposed by the present invention;

[0024] Figure 2 is Figure 1 a schematic structural diagram from another perspective;

[0025] Figure 3 is Figure 1 a top view of

[0026] Figure 4 is Figure 3 The structural schematic diagram of plane A-A in

[0027] Figure 5 is Figure 4 The enlarged structural schematic diagram of part a in

[0028] Figure 6 is Figure 2 The internal structural schematic diagram of the first-stage chamber and the second-stage chamber removed

[0029] Figure 7 is Figure 6 The enlarged structural schematic diagram after removing the first-stage impeller and the second-stage impeller

[0030] Figure 8 is Figure 7 The structural schematic diagram from another perspective

[0031] Figure 9 is Figure 8 The structural decomposition schematic diagram of

[0032] Figure 10 is Figure 2 The enlarged internal structural schematic diagram of the air filter in

[0033] Figure 11 is Figure 10 The structural schematic diagram from another perspective

[0034] Figure 12 is Figure 11 The structural decomposition schematic diagram after removing the filter plate.

[0035] In the figure: 1. First-stage chamber; 2. Connecting chamber; 3. Second-stage chamber; 4. Cooling guide pipe; 5. Intake pipe; 6. Exhaust pipe; 7. Air filter; 8. First-stage shaft; 9. Second-stage shaft; 10. Magnetic suspension bearing; 11. First-stage impeller; 12. Second-stage impeller; 13. Connecting valve; 14. Intake hole; 15. Sealing plug; 16. Fixed ring; 17. Slide bar; 18. Tension spring; 19. Connecting plate; 20. Fixed rod; 21. Contact plate; 22. Rotating ring; 23. Chute; 24. Slide block; 25. Spring; 26. Connecting rod; 27. Special-shaped block; 28. Touch control rod; 29. Mounting sleeve; 30. First switch; 31. Second switch; 32. Mounting bracket; 33. Motor; 34. Filter plate; 35. Rotating rod; 36. Baffle plate; 37. Dust removal seat; 38. Dust suction port; 39. Fixed sleeve; 40. Exhaust fan blade; 41. Sealing plate. Specific embodiments

[0036] Refer to Figures 1 - 12, A magnetic levitation two-stage centrifugal compressor, including a first-stage chamber 1 and a second-stage chamber 3. The first-stage chamber 1 is used for performing primary compression on air, and the second-stage chamber 3 is used for performing secondary compression on the air compressed by the first-stage chamber 1. A communication chamber 2 is provided between the first-stage chamber 1 and the second-stage chamber 3. The communication chamber 2 is used for mechanical connection between the first-stage chamber 1 and the second-stage chamber 3 to improve their stability. The first-stage chamber 1 communicates with the communication chamber 2. A cooling guide pipe 4 is fixedly connected between the communication chamber 2 and the second-stage chamber 3. The cooling guide pipe 4 is used for introducing the compressed gas in the first-stage chamber 1 into the second-stage chamber 3 and cooling the compressed gas in the first-stage chamber 1. An air inlet pipe 5 is fixedly installed on the first-stage chamber 1. The air inlet pipe 5 is used for pumping external air into the first-stage chamber 1. An exhaust pipe 6 is fixedly installed on the second-stage chamber 3. The exhaust pipe 6 is used for discharging the compressed air from the second-stage chamber 3. An air filter 7 is installed on the air inlet pipe 5. The air filter 7 is used for filtering the air entering the first-stage chamber 1 to avoid problems such as dust and other particulate matters entering the machine interior, causing equipment damage and reducing compression efficiency.

[0037] A first-stage shaft 8 is rotatably installed on the side wall of the first-stage chamber 1 through a magnetic levitation bearing 10. A second-stage shaft 9 is rotatably installed on the side wall of the second-stage chamber 3 through a magnetic levitation bearing 10. One end of the first-stage shaft 8 located in the first-stage chamber 1 is fixedly installed with a first-stage impeller 11. One end of the second-stage shaft 9 located in the second-stage chamber 3 is fixedly installed with a second-stage impeller 12. When the first-stage shaft 8 works, it is used to make the first-stage impeller 11 perform primary compression on the air entering the first-stage chamber 1. When the second-stage shaft 9 works, it is used to make the second-stage impeller 12 operate to perform secondary compression on the air after primary compression. The air described here can also be other gases that need to be compressed. Separating the design of the first-stage shaft 8 and the second-stage shaft 9 can control their operating conditions separately, so the operating power consumption of this compressor can be reduced.

[0038] A driving device matched with the first-stage shaft 8 is fixedly installed on the side wall of the first-stage chamber 1. The driving device is an existing product, and a linear motor can be specifically used to provide drive for the operation of the first-stage shaft 8. At the same time, it can also be used in cooperation with a controller to control the output power of the linear motor.

[0039] A communication valve 13 is fixedly installed at one end of the cooling guide pipe 4 close to the communication chamber 2. An anti-surge component is installed on the communication valve 13. The anti-surge component consists of an air inlet hole 14, a sealing plug 15, a fixing ring 16, a sliding rod 17 and a tension spring 18. The air inlet hole 14 is opened on the communication valve 13. The sealing plug 15 is sealingly and slidably installed at one end of the air inlet hole 14 away from the communication chamber 2. The fixing ring 16 is fixedly installed on the sealing plug 15. A plurality of sliding rods 17 are fixedly installed on the fixing ring 16. A plurality of sliding holes matched with the corresponding sliding rods 17 are opened on the communication valve 13. A plurality of tension springs 18 are installed between the fixing ring 16 and the communication valve 13. The sum of the elastic force values of the plurality of tension springs 18 constitutes the lowest threshold value of the gas compression pressure in the primary chamber 1. When the pressure of the gas compressed in the primary chamber 1 reaches the lowest threshold value, the gas moves the sealing plug 15 to make it move out of the air inlet hole 14. At this time, the gas can smoothly enter the secondary chamber 3 from the primary chamber 1. Through this design, when the air pressure in the primary chamber 1 is insufficient, the air inlet hole 14 is in a closed state. At this time, the gas in the secondary chamber 3 cannot flow back into the primary chamber 1, thereby avoiding the occurrence of surge problems.

[0040] One end of the air inlet hole 14 close to the communication chamber 2 is funnel-shaped. The advantage of this shape design is that it can ensure that the gas in the primary chamber 1 can be effectively gathered, exerting a stable pushing effect on the sealing plug 15. The depth of the sliding hole is greater than the depth of the air inlet hole 14. The advantage of this size design is that it can effectively ensure the connection effect between the fixing ring 16 and the communication valve 13. One end of the primary shaft 8 and the secondary shaft 9 close to each other is conical. The purpose of this shape design is to reduce the resistance of the primary shaft 8 and the secondary shaft 9 to the gas in the communication chamber 2.

[0041] A clutch component is installed between the primary shaft 8 and the secondary shaft 9. The clutch component is used to control the transmission of the primary shaft 8 to the secondary shaft 9. The clutch component consists of a connection disk 19, a fixing rod 20, a contact disk 21 and a rotating ring 22. The connection disk 19 is fixedly installed on the primary shaft 8. The fixing rod 20 is fixedly installed on the secondary shaft 9. The contact disk 21 is slidably arranged left and right on the fixing rod 20, and the contact disk 21 cooperates with the connection disk 19. The rotating ring 22 is rotatably installed at one end of the contact disk 21 away from the connection disk 19. When the contact disk 21 is connected to the connection disk 19, the primary shaft 8 and the secondary shaft 9 are in a connected state. At this time, the two rotate simultaneously. When the contact disk 21 is separated from the connection disk 19, the primary shaft 8 and the secondary shaft 9 are separated from each other. At this time, the rotation of the primary shaft 8 cannot drive the secondary shaft 9 to rotate. Through this design, when the air intake flow is insufficient and the air pressure in the primary chamber 1 is lower than the lowest threshold value, the primary shaft 8 and the secondary shaft 9 are separated. At this time, the secondary shaft 9 can be in a stationary state, which can reduce the power consumption to a certain extent and further reduce the possibility of surge occurrence.

[0042] A plurality of sliders 24 are fixedly installed on the inner wall of the contact disk 21 near one end of the secondary shaft 9. A plurality of chutes 23 slidably engaged with the corresponding sliders 24 are formed on the side wall of the fixed rod 20, and a spring 25 is installed between each chute 23 and the corresponding slider 24. The cooperation between the slider 24 and the chute 23 is used to limit the moving direction of the contact disk 21 on the fixed rod 20, so that the rotation of the contact disk 21 can drive the secondary shaft 9 to rotate simultaneously through the fixed rod 20. The elastic force of the spring 25 can improve the connection stability between the contact disk 21 and the connection disk 19 when they are in contact with each other.

[0043] A connecting rod 26 is fixedly installed at one end of the sealing plug 15 close to the communication chamber 2, and a special-shaped block 27 matched with the rotating ring 22 is fixedly installed on the connecting rod 26. The contact surface between the special-shaped block 27 and the rotating ring 22 is inclined to the left from the end close to the sealing plug 15 to the end far from the sealing plug 15 (refer to Figure 9 ). Therefore, when the sealing plug 15 is located in the air inlet hole 14 to seal it, the protruding end of the special-shaped block 27 contacts the rotating ring 22, so that the contact disk 21 and the connection disk 19 are in a separated state, realizing the automatic separation of the primary shaft 8 and the secondary shaft 9 when the air pressure in the primary chamber 1 is relatively low. When the sealing plug 15 is moved upward out of the air inlet hole 14, the concave end of the special-shaped block 27 contacts the rotating ring 22. At this time, under the elastic force of the spring 25, the contact disk 21 and the connection disk 19 are close to and contact each other, realizing the connection of the primary shaft 8 and the secondary shaft 9, and automatically controlling the connection relationship between the primary shaft 8 and the secondary shaft 9 according to the pressure change in the primary chamber 1.

[0044] A filter plate 34 and a mounting bracket 32 are fixedly installed inside the air filter 7. A rotating rod 35 is rotatably installed on the mounting bracket 32. One end of the rotating rod 35 close to the air inlet pipe 5 is fixedly installed with a shielding plate 36, and the other end of the rotating rod 35 is fixedly installed with a dust removal seat 37. A dust suction port 38 is opened at one end of the dust removal seat 37 close to the filter plate 34. A motor 33 and a fixed sleeve 39 are fixedly installed on the mounting bracket 32. An air extraction fan blade 40 is rotatably installed inside the fixed sleeve 39 through a rotating shaft, and the rotating shaft is fixedly connected to the output end of the motor 33. The rotating shaft is fixedly connected to the rotating rod 35. One end of the fixed sleeve 39 close to the dust removal seat 37 is hermetically and rotatably installed with a sealing plate 41, and a connecting pipe is fixedly connected between the sealing plate 41 and the dust removal seat 37. A one-way air outlet hole is opened at one end of the fixed sleeve 39 away from the sealing plate 41. When the motor 33 works, it drives the air extraction fan blade 40 to rotate simultaneously. At this time, the fixed sleeve 39 sucks the gas inside the dust removal seat 37 into the fixed sleeve 39 through the connecting pipe and discharges it outward through the one-way air outlet hole. The dust suction port 38 at the bottom of the dust removal seat 37 sucks the dust and impurities attached to the surface of the filter plate 34 into the dust removal seat 37, realizing the blockage removal of the filter plate 34, avoiding the surge problem caused by the low intake air flow due to the blockage of the filter plate 34. At the same time, since the motor 33 drives the rotating rod 35 to rotate simultaneously when working, the dust removal seat 37 also rotates on the filter plate 34, so as to realize the overall blockage removal treatment of the filter plate 34. The alignment setting of the shielding plate 36 and the dust removal seat 37 can reduce the negative pressure influence of the operation of the first-stage impeller 11 when absorbing the dust on the filter plate 34, ensuring the dust collection effect. At the same time, in order to avoid the subsequent removal of the dust collected in the dust removal seat 37, the dust suction port 38 is set as a one-way intake pipe. In addition, a filter screen is arranged at the dust removal seat 37 close to the connecting pipe to prevent the dust from entering the fixed sleeve 39 through the connecting pipe. Through this design, it is only necessary to clean the dust inside the dust removal seat 37 after using for a period of time.

[0045] An installation sleeve 29 is fixedly installed on the cooling guide pipe 4, and a first switch 30 and a second switch 31 are fixedly installed inside the installation sleeve 29. The first switch 30 is electrically connected to the driving device, and the second switch 31 is electrically connected to the motor 33. One end of the fixed ring 16 away from the connecting rod 26 is fixedly installed with a touch rod 28 that cooperates with the first switch 30 and the second switch 31. Through the design of the first switch 30 and the second switch 31, when the first-stage shaft 8 is separated from the second-stage shaft 9, the touch rod 28 touches the second switch 31. At this time, the motor 33 automatically runs to perform the blockage removal treatment on the filter plate 34. When the first-stage shaft 8 is in contact with the second-stage shaft 9, the touch rod 28 touches the first switch 30, so that the driving device operates at the corresponding power to ensure the effective compression of the air by the first-stage impeller 11 and the second-stage impeller 12.

[0046] The magnetic levitation bearing 10, the motor 33, the first switch 30, and the second switch 31 are all existing products, and their working principles and specific structures will not be elaborated here.

[0047] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A magnetic levitation two-stage centrifugal compressor, comprising a first-stage chamber (1) and a second-stage chamber (3). A communication chamber (2) is provided between the first-stage chamber (1) and the second-stage chamber (3). The first-stage chamber (1) communicates with the communication chamber (2). A cooling guide pipe (4) is fixedly connected between the communication chamber (2) and the second-stage chamber (3). An air inlet pipe (5) is fixedly installed on the first-stage chamber (1). An exhaust pipe (6) is fixedly installed on the second-stage chamber (3), characterized in that, It further includes: A first-stage shaft (8) is rotatably installed on the first-stage chamber (1) through a magnetic suspension bearing (10), and a second-stage shaft (9) is rotatably installed on the second-stage chamber (3) through a magnetic suspension bearing (10). One end of the first-stage shaft (8) located inside the first-stage chamber (1) is fixedly installed with a first-stage impeller (11), and one end of the second-stage shaft (9) located inside the second-stage chamber (3) is fixedly installed with a second-stage impeller (12). A clutch assembly, which is installed between the first-stage shaft (8) and the second-stage shaft (9), and is used to control the transmission of the first-stage shaft (8) to the second-stage shaft (9). The clutch assembly includes a rotating ring (22). A communication valve (13) is fixedly installed at one end of the cooling guide pipe (4) close to the communication chamber (2). An anti-surge assembly is installed on the communication valve (13), and the anti-surge assembly is used to make the gas pressure in the first-stage chamber (1) enter the second-stage chamber (3) unidirectionally when it reaches the threshold, and at the same time control the operation of the clutch assembly. The anti-surge assembly includes a sealing plug (15). One end of the sealing plug (15) close to the communication chamber (2) is fixedly installed with a connecting rod (26), and a special-shaped block (27) matched with the rotating ring (22) is fixedly installed on the connecting rod (26). An air filter (7) is installed on the intake pipe (5), and a filter plate (34) and a mounting frame (32) are fixedly installed inside the air filter (7). A rotating rod (35) is rotatably installed on the mounting frame (32). One end of the rotating rod (35) close to the intake pipe (5) is fixedly installed with a shielding plate (36), and the other end of the rotating rod (35) is fixedly installed with a dust removal seat (37). A dust suction port (38) is opened at one end of the dust removal seat (37) close to the filter plate (34). A motor (33) and a fixed sleeve (39) are fixedly installed on the mounting frame (32). An air extraction fan blade (40) is rotatably installed inside the fixed sleeve (39) through a rotating shaft, and the rotating shaft is fixedly connected to the output end of the motor (33). The rotating shaft is fixedly connected to the rotating rod (35). One end of the fixed sleeve (39) close to the dust removal seat (37) is sealed and rotatably installed with a sealing plate (41), and a connecting pipe is fixedly connected between the sealing plate (41) and the dust removal seat (37). One end of the fixed sleeve (39) away from the sealing plate (41) is provided with a one-way air outlet hole.

2. The magnetic levitation two-stage centrifugal compressor according to claim 1, wherein The clutch assembly further includes a connection disk (19), a fixed rod (20), and a contact disk (21). The connection disk (19) is fixedly installed on the first-stage shaft (8), the fixed rod (20) is fixedly installed on the second-stage shaft (9), the contact disk (21) is slidably arranged left and right on the fixed rod (20), and the contact disk (21) is matched with the connection disk (19). The rotating ring (22) is rotatably installed on one end of the contact disk (21) away from the connection disk (19).

3. The magnetic levitation two-stage centrifugal compressor according to claim 2, wherein A plurality of sliders (24) are fixedly installed on the inner wall of the contact disk (21) near one end of the secondary shaft (9). A plurality of chutes (23) slidably engaged with the corresponding sliders (24) are formed on the side wall of the fixed rod (20), and a spring (25) is installed between each chute (23) and the corresponding slider (24).

4. A magnetic levitation two-stage centrifugal compressor according to claim 3, wherein, The anti-surge assembly further includes an air inlet hole (14), a fixing ring (16), a sliding rod (17), and a tension spring (18). The air inlet hole (14) is formed in the communication valve (13). The sealing plug (15) is sealingly and slidably installed at one end of the air inlet hole (14) away from the communication chamber (2). The fixing ring (16) is fixedly installed on the sealing plug (15). A plurality of sliding rods (17) are fixedly installed on the fixing ring (16). A plurality of sliding holes engaged with the corresponding sliding rods (17) are formed in the communication valve (13). A plurality of tension springs (18) are installed between the fixing ring (16) and the communication valve (13).

5. A magnetic levitation two-stage centrifugal compressor according to claim 4, wherein, One end of the air inlet hole (14) near the communication chamber (2) is funnel-shaped. The depth of the sliding hole is greater than the depth of the air inlet hole (14). One ends of the primary shaft (8) and the secondary shaft (9) close to each other are tapered.

6. The magnetic levitation two-stage centrifugal compressor according to claim 4, wherein, A driving device engaged with the primary shaft (8) is fixedly installed on the side wall of the primary chamber (1). An installation sleeve (29) is fixedly installed on the cooling guide pipe (4), and a first switch (30) and a second switch (31) are fixedly installed in the installation sleeve (29). The first switch (30) is electrically connected to the driving device. The second switch (31) is electrically connected to the motor (33). A touch rod (28) engaged with the first switch (30) and the second switch (31) is fixedly installed at one end of the fixing ring (16) away from the connecting rod (26).

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