Magnetic suspension centrifugal compressor with high heat dissipation efficiency

Abstract

The application provides a high-efficiency heat-dissipation magnetic suspension centrifugal compressor, and relates to the field of heat dissipation of magnetic suspension compressors. The high-efficiency heat-dissipation magnetic suspension centrifugal compressor comprises a magnetic suspension main shaft, magnetic suspension bearings, a rotor and a first shell, the magnetic suspension bearings are provided in two groups and are installed on the magnetic suspension main shaft, the magnetic suspension main shaft and the magnetic suspension bearings are installed in the first shell, the rotor is installed on the magnetic suspension main shaft, and a circle of heat-dissipation fins is further fixedly installed on the first shell, the magnetic suspension bearings and the first shell are fixedly connected through a hole-bearing ring, and the hole-bearing ring can realize air flow from the outer ring of the magnetic suspension bearings into the first shell. The high-efficiency heat-dissipation magnetic suspension centrifugal compressor is provided with a positive cooling assembly, the magnetic suspension main shaft can control the rotation of the worm gear and the U-shaped cover when rotating, so that air from the outside is used to cool the internal parts, and the effect of taking away the internal heat can still be realized under high rotation speed.

Description

TECHNICAL FIELD

[0001] The application relates to the field of magnetic suspension compressor heat dissipation, in particular to a magnetic suspension centrifugal compressor with high heat dissipation efficiency. BACKGROUND

[0002] A magnetic suspension bearing is a kind of bearing that uses a magnetic field to suspend a rotor, so that mechanical friction is not generated in rotation. In a refrigeration compressor, a magnetic suspension bearing is used to realize oil-free operation of a refrigeration system and avoid a complex lubricating oil system.

[0003] Although the magnetic suspension design reduces heat generation due to mechanical wear, the internal temperature of the compressor is relatively high during use due to the temperature rise of the gas during compression, electromagnetic loss and other reasons. In severe cases, the thermal expansion of the central rotating shaft will cause the rotor diameter to increase, the air gap to decrease, the difficulty of magnetic force control to increase, and the rotating shaft to be out of balance and collide with the bearing. SUMMARY

[0004] In view of the deficiencies of the prior art, the application provides a magnetic suspension centrifugal compressor with high heat dissipation efficiency, which solves the problems in the above background.

[0005] To achieve the above purpose, the application is implemented by the following technical scheme: a magnetic suspension centrifugal compressor with high heat dissipation efficiency, comprising a magnetic suspension main shaft, magnetic suspension bearings, a rotor and a first shell, the magnetic suspension bearings are provided in two groups and are installed on the magnetic suspension main shaft, the magnetic suspension main shaft and the magnetic suspension bearings are installed in the first shell, the rotor is installed on the magnetic suspension main shaft, and a circle of heat dissipation fins is further fixedly installed on the first shell, the magnetic suspension bearings and the first shell are fixedly connected through a hole round ring, and the hole round ring can realize airflow entering the first shell from the outer circle of the magnetic suspension bearings.

[0006] Further comprising a second shell and an active cooling assembly, the active cooling assembly is installed at one end of the magnetic suspension main shaft outside the first shell and is located on the side of the guide ring away from the rotor, the magnetic suspension main shaft and the first shell are installed in the second shell, the heat dissipation fins of the first shell are suspended in the second shell, airflow circulation pipes are fixedly installed at the centers of the two ends of the second shell, the magnetic suspension main shaft is suspended through the airflow circulation pipes, and the active cooling assembly can actively dissipate heat from the inside and outside of the first shell when the magnetic suspension main shaft rotates. One end of the side of the second shell away from the active cooling assembly is provided with an exhaust hole.

[0007] Preferably, the active cooling assembly comprises a U-shaped cover, a sliding pipe and a closed shell, one end of the closed shell is open, the open end is connected to the first shell and leads to the hole ring and the magnetic suspension bearing, the other end has an annular air inlet point between the magnetic suspension spindle, the U-shaped cover is in the closed shell, the opening direction of the U-shaped cover is opposite to the closed shell, the closed shell is installed with a circle of air pipes on the side corresponding to the opening of the U-shaped cover, the other end of the air pipe is folded back and extends into the second shell, the sliding pipe is fixed at the center of the U-shaped cover, the sliding pipe is sleeved on the magnetic suspension spindle, and the two can rotate relative to each other;

[0008] Further comprising a magnetic transmission structure for controlling the connection and power transmission between the sliding pipe and the magnetic suspension spindle;

[0009] Further comprising an electromagnetic controller, a magnetic compression ring and a turbine, the electromagnetic controller is in the U-shaped cover, the outer end of the electromagnetic controller is fixed to the closed shell, the turbine is fixed at the center of the U-shaped cover, and the tip of the turbine corresponds to the air inlet point;

[0010] The inner bottom wall of the U-shaped cover is provided with a circle of through air grooves, the turbine root is in the circle of air grooves, and the air door capable of elastic opening and closing is installed on the air groove, the magnetic compression ring can tightly contact the air door under the magnetic repulsion of the electromagnetic controller, so that the air door closes the air groove, and vice versa, the electromagnetic controller can also attract the magnetic compression ring to make the air door open;

[0011] When the air door is opened, the rotation of the magnetic suspension spindle can make the U-shaped cover rotate, and the air door, the turbine and the air groove realize air suction into the closed shell.

[0012] Preferably, the opening of the closed shell corresponds to the hole ring, and the air groove of the U-shaped cover corresponds to the magnetic suspension bearing.

[0013] Preferably, the first shell is fixedly installed with a guide ring on the side of the rotor, the magnetic suspension spindle passes through the inner ring of the guide ring, the magnetic suspension bearing corresponds to the inner ring of the guide ring, the outer ring of the guide ring corresponds to the inner wall coil of the first shell, and the middle part of the guide ring is an arc transition structure.

[0014] Preferably, the active cooling assembly further comprises a wind ring, the wind ring is located outside the air door and is fixed to the inner bottom wall of the U-shaped cover, the side away from the inner bottom wall of the U-shaped cover of the wind ring is a horn-shaped opening structure, when the air door is closed, the rotation of the magnetic suspension spindle makes the turbine suck air and pass through the wind ring to return to the air pipe.

[0015] Preferably, the magnetic transmission structure comprises a magnetic coil, an annularly distributed electromagnetic telescopic head is installed on one end of the sliding pipe, the magnetic coil is correspondingly installed on the inner wall of the closed shell, a power connection groove is arranged on the magnetic suspension spindle corresponding to the electromagnetic telescopic head, and the magnetic coil can make the electromagnetic telescopic head extend into the power connection groove, so that the sliding pipe and the magnetic suspension spindle are transmissionally connected.

[0016] Preferably, one of the air flow circulation pipes is in communication with the closed shell, and the inner circle of the air flow circulation pipe corresponds to the air inlet point.

[0017] Preferably, the center of the other air flow circulation pipe corresponds to the magnetic suspension bearing.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] 1. The high-efficiency heat-dissipation magnetic suspension centrifugal compressor, by setting the active cooling assembly, the magnetic suspension main shaft can control the rotation of the worm gear and the U-shaped cover when rotating, thereby realizing the cooling of the internal parts by air suction from the outside, and still realizing the effect of taking away the internal heat in the case of high speed.

[0020] 2. The high-efficiency heat-dissipation magnetic suspension centrifugal compressor, when primary cooling, the connecting slide pipe is connected with the magnetic suspension main shaft, at this time the wind power of the turbine can be used for the heat dissipation fins outside the first shell to cool, when forced cooling, the air door is opened, at this time the wind power of the U-shaped cover and the turbine is used in the first shell and the magnetic suspension bearing, at this time the internal heating elements can be cooled, thereby realizing various heat dissipation effects.

[0021] 3. The high-efficiency heat-dissipation magnetic suspension centrifugal compressor, by setting the guide ring, the wind power entering the first shell can act on the rotor, or can be transferred between the rotor and the stator coil through the guide ring, thereby realizing forced cooling of the components with large heat generation.

[0022] 4. The high-efficiency heat-dissipation magnetic suspension centrifugal compressor, by setting the hole ring, the hole ring can make part of the forced cooling wind power act on the magnetic suspension bearing, and the other part enters the first shell, realizing the effect of multiple cooling.

[0023] 5. The high-efficiency heat-dissipation magnetic suspension centrifugal compressor, when not needing cooling, disconnecting the connecting slide pipe and the magnetic suspension main shaft, at this time the rotation of the magnetic suspension main shaft is not affected by resistance, and is load-free at high speed. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic view of the present application;

[0025] Figure 2 It is a structural sectional view of the present application;

[0026] Figure 3 It is an internal structure view of the second shell of the present application;

[0027] Figure 4 It is a structural schematic view of the first shell of the present application;

[0028] Figure 5 It is a structural half-sectional view of the second shell of the present application;

[0029] Figure 6 Structure diagram of the active cooling assembly and the rotor of the application;

[0030] Figure 7 Structure sectional view of the active cooling assembly and the rotor of the application;

[0031] Figure 8 Internal structure diagram of the active cooling assembly of the application;

[0032] Figure 9 Structure separation diagram of the active cooling assembly of the application;

[0033] Figure 10 Structure diagram of the U-shaped cover and the turbine of the application.

[0034] In the figure: 1, magnetic suspension spindle; 2, magnetic suspension bearing; 3, rotor; 4, first shell; 5, heat dissipation fin; 6, hole ring; 7, second shell; 8, active cooling assembly; 801, U-shaped cover; 802, sliding pipe; 803, closed shell; 804, air pipe; 805, electromagnetic controller; 806, magnetic compression ring; 807, turbine; 808, air groove; 809, air door; 810, air ring; 811, magnetic coil; 812, electromagnetic telescopic head; 9, air circulation pipe; 10, exhaust hole; 11, guide ring. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0036] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement condition and the like between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0037] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the protection scope claimed by the present application.

[0039] As shown in Figures 1-10 A high-efficiency heat dissipation magnetic suspension centrifugal compressor, comprising a magnetic suspension main shaft 1, a magnetic suspension bearing 2, a rotor 3 and a first shell 4, the magnetic suspension bearing 2 is provided with two groups, which are installed on the magnetic suspension main shaft 1, the magnetic suspension main shaft 1 and the magnetic suspension bearing 2 are installed in the first shell 4, the rotor 3 is installed on the magnetic suspension main shaft 1, and a circle of heat dissipation fins 5 is further fixedly installed on the first shell 4, the magnetic suspension bearing 2 and the first shell 4 are fixedly connected through a hole ring 6, and the hole ring 6 can realize that the airflow enters the first shell 4 from the outer circle of the magnetic suspension bearing 2.

[0040] It also includes a second shell 7 and an active cooling assembly 8, the active cooling assembly 8 is installed at one end of the magnetic suspension main shaft 1 outside the first shell 4, and is located on the side away from the rotor 3 of the guide ring 11, the magnetic suspension main shaft 1 and the first shell 4 are installed in the second shell 7, the heat dissipation fins 5 of the first shell 4 are suspended in the second shell 7, and the airflow circulation pipes 9 are fixedly installed at the two end centers of the second shell 7, the magnetic suspension main shaft 1 suspends through the airflow circulation pipes 9, and the active cooling assembly 8 can actively dissipate heat inside and outside the first shell 4 when the magnetic suspension main shaft 1 rotates, and the end part of the side away from the active cooling assembly 8 of the second shell 7 is provided with an exhaust hole 10.

[0041] The first shell 4 is also provided with an axial magnetic suspension bearing, and the internal heat dissipation elements are all in the first shell 4, and part of the heat generated by the coil in the first shell 4 can be dissipated through the heat dissipation fins 5.

[0042] The hole ring 6 provided on one magnetic suspension bearing 2 has two groups, the inner holes of the two groups of hole rings 6 are used to support the magnetic suspension bearing 2, and the outer circles are fixed with the inner wall of the first shell 4.

[0043] The second shell 7 is a thin-walled shell, which completely wraps the first shell 4, and there is a space between the two for airflow to pass through, and the ends of the airflow circulation pipes 9 away from the second shell 7 are all provided with a horn structure for better airflow.

[0044] In an alternative embodiment, the active cooling assembly 8 comprises a U-shaped cover 801, a sliding tube 802 and a closed shell 803, one end of the closed shell 803 is open, the open end is connected to the first housing 4 and leads to the hole ring 6 and the magnetic bearing 2, the other end has a ring-shaped air inlet point between the magnetic suspension spindle 1, the U-shaped cover 801 is in the closed shell 803, the opening direction of the U-shaped cover 801 is opposite to the closed shell 803, the closed shell 803 is provided with a circle of air pipes 804 distributed on the side corresponding to the opening of the U-shaped cover 801, the other end of the air pipe 804 is folded back and extends into the second housing 7, the sliding tube 802 is fixed at the center position of the U-shaped cover 801, the sliding tube 802 is sleeved on the magnetic suspension spindle 1, and the two can rotate relative to each other. It also includes a magnetic transmission structure for controlling the connection and power transmission of the sliding tube 802 and the magnetic suspension spindle 1. It also includes an electromagnetic controller 805, a magnetic compression ring 806 and a turbine 807, the electromagnetic controller 805 is in the U-shaped cover 801, the outer end of the electromagnetic controller 805 is fixed with the closed shell 803, the turbine 807 is fixed at the center of the U-shaped cover 801, and the tip of the turbine 807 corresponds to the air inlet point. The inner bottom wall of the U-shaped cover 801 is provided with a circle of through air grooves 808, the turbine 807 is located in a circle of air grooves 808, and the air grooves 808 are all provided with air doors 809 that can be elastically opened and closed. The magnetic compression ring 806 can tightly adhere to the air door 809 under the magnetic repulsion of the electromagnetic controller 805, so that the air door 809 closes the air groove 808, and vice versa. The electromagnetic controller 805 can also attract the magnetic compression ring 806 so that the air door 809 is in an open state. When the air door 809 is opened, the rotation of the magnetic suspension spindle 1 can make the U-shaped cover 801 rotate, and the air door 809, the turbine 807 and the air groove 808 realize air suction into the closed shell 803.

[0045] In this embodiment, there is a free gap between the U-shaped cover 801 and the closed shell 803 for high-speed rotation of the U-shaped cover 801, the inner hole of the sliding tube 802 is coated with lubricating oil, and there is no hard connection between the inner hole of the sliding tube 802 and the magnetic suspension spindle 1. The viscosity of the lubricating oil is not enough to make the magnetic suspension spindle 1 rotate with the U-shaped cover 801.

[0046] The electromagnetic controller 805 is provided with a circle of electromagnets, and the side of the magnetic compression ring 806 close to the electromagnets also has magnetism. When the electromagnets are electrified, there is a magnetic repulsion between them, which can make the magnetic compression ring 806 tightly adhere to the inner bottom wall of the U-shaped cover 801. When the repulsion is reduced, the magnetic compression ring 806 will leave the inner bottom wall of the U-shaped cover 801 under the elastic reaction force of the air door 809, and the magnetic compression ring 806 can rotate with the U-shaped cover 801.

[0047] The wind grooves 808 are distributed in a fan shape on the inner bottom wall of the U-shaped cover 801, and a slope is arranged on one side of the bottom of the U-shaped cover 801. One end of the air door 809 is elastically hinged to the wind groove 808, and a spring is arranged at the hinge position of the two. After the air door 809 is opened, the wind groove 808 cooperates with the air door 809 to form a structure similar to a fan, and the windward surface of the air door 809 is arranged on the side facing the wind groove 808, so that the air door 809 will not be closed due to the resistance of the airflow.

[0048] In an optional embodiment, the opening of the closed shell 803 corresponds to the perforated ring 6, and the wind groove 808 of the U-shaped cover 801 corresponds to the magnetic suspension bearing 2.

[0049] In this embodiment, the air outlet of the closed shell 803 can pass through the perforated ring 6, and the air outlet of the wind groove 808 can pass through the magnetic suspension bearing 2. That is, the airflow can pass through the perforated ring 6 or the magnetic suspension bearing 2 at the same time. One is to cool the internal components, and the other is to disperse the cooling of the stator coil.

[0050] In an optional embodiment, the first housing 4 is fixedly installed with a guide ring 11 on the side of the rotor 3. The magnetic suspension spindle 1 passes through the inner ring of the guide ring 11, the magnetic suspension bearing 2 corresponds to the inner ring of the guide ring 11, the outer ring of the guide ring 11 corresponds to the inner wall coil of the first housing 4, and the middle part of the guide ring 11 is an arc transition structure.

[0051] In this embodiment, after the airflow blows to the guide ring 11, the airflow around the magnetic suspension spindle 1 in the middle can pass through the center of the guide ring 11 to cool the surface of the magnetic suspension spindle 1 and the rotor 3. In addition, the airflow passing through the guide ring 11 will flow to the space between the stator coil and the rotor 3 to guide the heat between them.

[0052] In an optional embodiment, the active cooling assembly 8 further comprises a wind ring 810. The wind ring 810 is arranged outside the air door 809 and is fixed to the inner bottom wall of the U-shaped cover 801. The side of the wind ring 810 away from the inner bottom wall of the U-shaped cover 801 is a horn-shaped opening structure. When the air door 809 is closed, the rotation of the magnetic suspension spindle 1 causes the turbine 807 to suck air and pass through the wind ring 810 to return to the air pipe 804.

[0053] In this embodiment, the horn-shaped structure of the wind ring 810 can not only be used for airflow reversing, but also the magnetic compression ring 806 can be limited by the wind ring 810 to avoid deviation.

[0054] In an alternative embodiment, the magnetic transmission structure comprises a magnetic coil 811, and a ring-shaped electromagnetic telescopic head 812 is installed on one end of the slide pipe 802. The magnetic coil 811 is correspondingly installed on the inner wall of the closed shell 803. A power connection groove is arranged on the magnetic suspension spindle 1 corresponding to the electromagnetic telescopic head 812. The magnetic coil 811 can make the electromagnetic telescopic head 812 extend into the power connection groove, so that the slide pipe 802 is in transmission connection with the magnetic suspension spindle 1.

[0055] In this embodiment, the magnetic coil 811 can make the inner core of the electromagnetic telescopic head 812 move under the control of electricity. When the inner core of the electromagnetic telescopic head 812 moves to the magnetic suspension spindle 1, power connection is achieved. Conversely, after disconnection, the internal elastic reaction force can make the inner core of the electromagnetic telescopic head 812 move away from the magnetic suspension spindle 1.

[0056] In an alternative embodiment, one of the air circulation pipes 9 is in communication with the closed shell 803. The inner circle of the air circulation pipe 9 corresponds to the air inlet point.

[0057] In this embodiment, the air circulation pipe 9 is mainly used for the entry of air, especially when the air is fully inhaled, the air inlet of the air circulation pipe 9 can quickly enter the closed shell 803, which is used for the centrifugal wind power supply of the turbine 807.

[0058] In an alternative embodiment, the center of the other air circulation pipe 9 corresponds to the magnetic suspension bearing 2.

[0059] In this embodiment, the air circulation pipe 9 is mainly used for air exhaust. In addition to the exhaust hole 10 for air exhaust, the remaining hot air can be exhausted from the last magnetic suspension bearing 2 and then exhausted through the air circulation pipe 9.

[0060] In use, when the magnetic suspension compressor needs to be preliminarily cooled during low-power operation, the magnetic coil 811 controls the extension of the electromagnetic telescopic head 812 into the slide pipe 802. After the extension of the electromagnetic telescopic head 812, the power connection groove on the magnetic suspension spindle 1 can be connected. Thus, when the magnetic suspension spindle 1 rotates, the U-shaped cover 801 can be driven to rotate. When the U-shaped cover 801 rotates, the turbine 807 inside the U-shaped cover 801 generates centrifugal wind power. The external cooling air enters the air circulation pipe 9, then changes direction through the air ring 810, and finally returns to the second outer shell 7 through the air pipe 804. The cooling air entering the second outer shell 7 can cool the heat dissipation fins 5 on the first outer shell 4. The cooling air with heat can be exhausted through the exhaust hole 10.

[0061] When the magnetic suspension compressor needs forced cooling in high-power operation, the electromagnetic controller 805 reduces the repulsive force on the magnetic compression ring 806, and the air door 809 is opened by the elastic reaction force after the magnetic compression ring 806 leaves the inner bottom wall of the U-shaped shell 801. At this time, the magnetic suspension spindle 1 rotates at high speed and can rotate the U-shaped shell 801 and the turbine 807 at high speed. The centrifugal wind power of the turbine 807 and the wind power generated by the air door 809 cooperating with the air groove 808 are mostly passed through the air groove 808, and a small part is still passed through the air pipe 804 into the first outer shell 4. The cooling air passing through the air groove 808 first acts on the magnetic suspension bearing 2, and then enters the first outer shell 4. The cooling air entering the first outer shell 4 can be guided by the guide ring 11 to actively cool the stator coil and the rotor 3, and then cool the remaining magnetic suspension bearing 2. Finally, the hot air is discharged from the exhaust hole 10 and the air flow circulation pipe 9. At this time, the internal heating elements can be cooled. The size of the repulsive force can be changed according to the different power consumptions, so that the opening and closing angle of the air door 809 can be controlled. Thus, the cooling air generated under the premise of rotation is also controllable, thereby realizing linear and real-time cooling of the internal magnetic suspension compressor without increasing additional power consumption.

[0062] When the magnetic suspension compressor is in low-power operation, the magnetic coil 811 disconnects the power connection between the electromagnetic telescopic head 812 and the magnetic suspension spindle 1. At this time, the magnetic suspension spindle 1 cannot drive the U-shaped shell 801 and the turbine 807 to rotate when rotating, so as not to increase additional power loss.

[0063] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0064] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0065] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A high-efficiency heat dissipation magnetic levitation centrifugal compressor, comprising a magnetic levitation main shaft (1), magnetic levitation bearings (2), a rotor (3), and a first housing (4), wherein two sets of magnetic levitation bearings (2) are provided, both installed on the magnetic levitation main shaft (1), the magnetic levitation main shaft (1) and the magnetic levitation bearings (2) are both installed in the first housing (4), the rotor (3) is installed on the magnetic levitation main shaft (1), and a ring of heat dissipation fins (5) is also fixedly installed on the first housing (4), characterized in that: The magnetic suspension bearing (2) is fixedly connected with the first shell (4) through a hole ring (6), and the hole ring (6) can realize airflow entering the first shell (4) from the outer ring of the magnetic suspension bearing (2); Further comprising a second shell (7) and an active cooling assembly (8), the active cooling assembly (8) is installed at one end of the magnetic suspension spindle (1) outside the first shell (4) and at the side of the guide ring (11) away from the rotor (3), the magnetic suspension spindle (1) and the first shell (4) are both installed in the second shell (7), the heat dissipation fins (5) of the first shell (4) are suspended in the second shell (7), airflow circulation pipes (9) are fixedly installed at the centers of both ends of the second shell (7), the magnetic suspension spindle (1) suspends through the airflow circulation pipes (9), and the active cooling assembly (8) can actively dissipate heat to the inside and outside of the first shell (4) when the magnetic suspension spindle (1) rotates; an exhaust hole (10) is arranged at the end of the side of the second shell (7) away from the active cooling assembly (8); The active cooling assembly (8) comprises a U-shaped cover shell (801), a sliding pipe (802) and a closed shell (803), one end of the closed shell (803) is open, the open end is connected with the first shell (4) and leads through the hole ring (6) and the magnetic suspension bearing (2), and there is an annular air inlet point between the other end of the closed shell (803) and the magnetic suspension spindle (1); the U-shaped cover shell (801) is in the closed shell (803), the opening direction of the U-shaped cover shell (801) is opposite to the closed shell (803), a circle of air pipes (804) are arranged on the side of the closed shell (803) corresponding to the opening of the U-shaped cover shell (801), the other ends of the air pipes (804) are folded back and extended into the second shell (7), the sliding pipe (802) is fixed at the center of the U-shaped cover shell (801), and the sliding pipe (802) is sleeved on the magnetic suspension spindle (1) and can rotate relative to the magnetic suspension spindle (1); Further comprising a magnetic transmission structure for controlling the connection and power transmission of the sliding pipe (802) and the magnetic suspension spindle (1); Further comprising an electromagnetic controller (805), a magnetic compression ring (806) and a turbine (807), the electromagnetic controller (805) is in the U-shaped cover shell (801), the outer end of the electromagnetic controller (805) is fixed with the closed shell (803), the turbine (807) is fixed at the center of the U-shaped cover shell (801), and the tip of the turbine (807) corresponds to the air inlet point; The inner bottom wall of the U-shaped cover shell (801) is provided with a circle of through air grooves (808), the root of the turbine (807) is in the circle of air grooves (808), the air grooves (808) are all provided with air doors (809) capable of being elastically opened and closed, the magnetic compression ring (806) can tightly abut against the air door (809) under the magnetic repulsion of the electromagnetic controller (805), so that the air door (809) closes the air groove (808), and conversely the electromagnetic controller (805) can also attract the magnetic compression ring (806) to make the air door (809) be in an open state. When the air door (809) is opened, the rotation of the magnetic suspension spindle (1) can rotate the U-shaped cover (801), and the air door (809), the turbine (807) and the air slot (808) realize air suction into the closed shell (803).

2. The magnetically suspended centrifugal compressor with high efficiency heat dissipation according to claim 1, characterized in that: The opening of the closed shell (803) corresponds to the hole ring (6), and the air slot (808) of the U-shaped cover (801) corresponds to the magnetic suspension bearing (2).

3. The magnetically suspended centrifugal compressor with high efficiency heat dissipation according to claim 2, characterized in that: The first shell (4) is fixedly installed with a guide ring (11) on one side of the rotor (3), the magnetic suspension spindle (1) suspends through the inner ring of the guide ring (11), the magnetic suspension bearing (2) corresponds to the inner ring of the guide ring (11), the outer ring of the guide ring (11) corresponds to the inner wall coil of the first shell (4), and the middle part of the guide ring (11) is an arc transition structure.

4. The magnetically suspended centrifugal compressor with high efficiency heat dissipation according to claim 3, characterized in that: The active cooling assembly (8) further comprises a wind ring (810), which is located outside the air door (809) and is fixed to the inner bottom wall of the U-shaped cover (801). The side of the wind ring (810) away from the inner bottom wall of the U-shaped cover (801) is a horn-shaped opening structure. When the air door (809) is closed, the rotation of the magnetic suspension spindle (1) causes the turbine (807) to suck air and return to the air pipe (804) through the wind ring (810).

5. The magnetically suspended centrifugal compressor with high efficiency heat dissipation according to claim 4, characterized in that: The magnetic transmission structure comprises a magnetic coil (811), and the one end of the sliding pipe (802) is provided with an annularly distributed electromagnetic telescopic head (812). The magnetic coil (811) is correspondingly installed on the inner wall of the closed shell (803), and the magnetic suspension spindle (1) is provided with a power connection groove corresponding to the electromagnetic telescopic head (812). The magnetic coil (811) can make the electromagnetic telescopic head (812) extend into the power connection groove, so that the sliding pipe (802) is in driving connection with the magnetic suspension spindle (1).

6. The magnetically suspended centrifugal compressor with high efficiency heat dissipation according to claim 5, characterized in that: One of the air flow circulation pipes (9) is in communication with the closed shell (803), and the inner ring of the air flow circulation pipe (9) corresponds to the air inlet point.

7. The magnetically suspended centrifugal compressor with high efficiency heat dissipation according to claim 6, characterized in that: The center of the other air flow circulation pipe (9) corresponds to the magnetic suspension bearing (2).

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