Magnetic suspension motor integrated with air cooling heat dissipation device and magnetic suspension equipment

Abstract

The invention relates to a magnetic suspension motor and magnetic suspension equipment integrated with an air cooling heat dissipation device, the magnetic suspension motor comprises a magnetic suspension stator and a magnetic suspension rotor, the magnetic suspension stator comprises a casing and a stator assembly, the casing comprises an outer cylinder, an inner cylinder and a bottom plate, and the stator assembly is arranged in an annular space enclosed by the inner cylinder, the outer cylinder and the bottom plate. The air-cooling heat dissipation device comprises an air-cooling stator and an air-cooling rotor, the air-cooling stator is arranged in the annular space, the air-cooling rotor comprises a rotor main body and at least one air-cooling impeller arranged on the rotor main body, the rotor main body is at least partially arranged in the inner cylinder, and the air-cooling stator drives the rotor main body and the at least one air-cooling impeller to rotate and suspend in a non-contact mode; and the magnetic suspension stator is subjected to air cooling heat dissipation. The magnetic suspension motor is compact in structure, centralized management of power supply lines of the air cooling stator and the magnetic suspension stator can be achieved, the air cooling stator drives the air cooling rotor to dissipate heat in a non-contact mode, good heat dissipation is achieved, meanwhile, mechanical abrasion is avoided, particles are not generated, and the heat dissipation requirements of special working environments such as high cleanliness can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic levitation motors, and particularly to a magnetic levitation motor and a magnetic levitation device integrated with an air-cooling heat dissipation device. Background Art

[0002] A magnetic levitation motor is a magnetic levitation rotary driver that uses magnetic force to levitate the rotor so that there is no mechanical contact between the rotor and the stator. The magnetic levitation motor can be a magnetic bearing motor, a bearingless motor, a bearingless wafer motor, etc.

[0003] A magnetic bearing motor, also known as a magnetic bearing, is a motor that combines a rotary drive motor with an axial magnetic bearing or / and a radial magnetic bearing or / and a shaft diameter hybrid magnetic bearing, etc., rather than integrating them together.

[0004] A bearingless motor is a motor that integrates the functions of motor rotation and suspension. On the winding that generates the rotary drive magnetic field of the bearingless motor, an additional set of windings is wound to generate an excitation magnetic field. The interaction between the two magnetic fields breaks the balanced distribution of the original drive magnetic field, thereby generating a radial force acting on the rotor. The suspension of the rotor is achieved by controlling the radial force in the motor. Compared with the magnetic bearing motor, the magnetic levitation winding of the bearingless motor is wound on the stator, without occupying additional space, and to a certain extent overcomes the disadvantages of the large volume and high cost of the magnetic bearing. In the early stage, in order to achieve the suspension of the motor rotor in five degrees of freedom, generally two bearingless motors and an axial magnetic bearing were required.

[0005] A bearingless wafer motor is a special bearingless motor that inherits the advantages of the bearingless motor, and the ratio of the axial length to the diameter of the rotor is very small, showing a wafer shape. The axial magnetic bearing is omitted, and the rotation and radial active suspension of the rotor are realized by using bearingless technology. The passive suspension of the other three degrees of freedom except the radial and rotor rotation degrees of freedom is realized by using the magnetic circuit formed by the mechanical structure. It has the characteristics of high cleanliness, no precipitation, no particles, no dynamic seal, and excellent performance, and has good application prospects in ultra-clean drive fields such as biochemistry, medical treatment, and semiconductor manufacturing.

[0006] The magnetic levitation motor includes a magnetic levitation stator and a magnetic levitation rotor. The magnetic levitation rotor can be an integral rotor. For example, in the application of a magnetic levitation pump, the magnetic levitation rotor is both the rotor of the magnetic levitation motor and the rotor of the pump, and can be, for example, a permanent magnet rotor, a short-circuit cage rotor, or a reluctance rotor. The magnetic levitation stator is designed as a bearing and a drive stator, and generally includes a magnetic conductive ring, a plurality of stator teeth, and winding coils wound around the stator teeth. For example, in the application of a magnetic levitation pump, the magnetic levitation stator is both the stator for rotational drive and the stator for magnetic levitation. A magnetic field can be generated by the winding coils of the stator. On the one hand, this magnetic field exerts a torque on the rotor, thereby realizing its rotation around the desired rotation axis. On the other hand, a shear force is exerted, and this shear force can be applied to the rotor as needed so that its radial position can be actively controlled or adjusted. Therefore, the three degrees of freedom of the rotor, namely its rotation and its radial position (two degrees of freedom), can be actively adjusted. Regarding the other three degrees of freedom, namely its position in the axial direction and its inclination relative to the radial plane perpendicular to the desired rotation axis (two degrees of freedom), the rotor is magnetically levitated or stabilized passively by magnetic resistance. Without a separate magnetic bearing and with the rotor being completely magnetically levitated, the bearingless motor gets its name.

[0007] The magnetic levitation motor can be assembled with fittings having different functions, thus becoming a magnetic levitation device for different application requirements. In one embodiment, the magnetic levitation device can be configured as a magnetic levitation pump. In the application of the magnetic levitation pump, the magnetic levitation pump includes a magnetic levitation motor and a pump head. The pump head includes a pump casing and a rotor impeller disposed within the pump casing. The magnetic levitation rotor is both the rotor of the magnetic levitation motor and a part of the rotor impeller of the pump, and can be, for example, a permanent magnet rotor, a short-circuit cage rotor, or a reluctance rotor. The magnetic levitation stator is configured to drive the rotor impeller to rotate and levitate. In another embodiment, the magnetic levitation device is configured as a magnetic levitation mixer. In the application of the magnetic levitation mixer, the magnetic levitation mixer includes a magnetic levitation motor and a mixing device. The mixing device includes a mixing container and a rotor mixing head disposed within the mixing container. The magnetic levitation rotor is both the rotor of the magnetic levitation motor and a part of the rotor mixing head of the mixing device. The magnetic levitation stator is configured to drive the rotor mixing head to rotate and levitate.

[0008] At present, the magnetic levitation motors used in magnetic levitation pump products mainly adopt the air-cooled heat dissipation method. Generally, it includes two categories. One category is: attaching a flow guide cover to the base of the magnetic levitation motor housing and configuring a cooling fan. Traditional cooling fans have mechanical wear, generate particles, have low cleanliness, and do not have corrosion resistance, and cannot work in explosion-proof areas, resulting in the problem of fan heat dissipation of the magnetic levitation motor in some special working environments (flammable and explosive gas and dust areas, strong acid and strong alkali environments, and environments with high cleanliness requirements, etc.). Moreover, the cooling fan cannot be centrally managed with the magnetic levitation motor and requires a separate power supply line, with low environmental cleanliness and high failure rate. The other category is: attaching a flow guide cover to the base of the magnetic levitation motor housing and externally connecting compressed air for heat dissipation. The compressed air heat dissipation method requires an external air compressor and needs to lay air pipes to the working area of the magnetic levitation motor, with relatively high noise. If an air compressor is not allowed to exist in some special working environments, it cannot be used. And due to cleanliness requirements, the compressed air also needs to be filtered, with a relatively high cost. Therefore, there is an urgent need to design a magnetic levitation heat dissipation solution that can meet the heat dissipation requirements of special working environments such as high cleanliness. Summary of the Invention

[0009] To solve the above technical problems, the present invention proposes a magnetic levitation motor and a magnetic levitation device integrated with an air-cooled heat dissipation device, which can achieve good heat dissipation while having no mechanical wear, not generating particles, and meeting the heat dissipation requirements of special working environments such as high cleanliness.

[0010] According to one aspect of the present invention, there is provided a magnetic levitation motor integrated with an air-cooled heat dissipation device, including a magnetic levitation stator. The magnetic levitation stator includes a housing and a stator assembly. The housing includes an outer cylinder, an inner cylinder, and a bottom plate connecting the outer cylinder and the inner cylinder. The stator assembly is disposed in the annular space surrounded by the inner cylinder, the outer cylinder, and the bottom plate. The air-cooled heat dissipation device includes an air-cooled stator and an air-cooled rotor. The air-cooled stator is disposed in the annular space. The air-cooled rotor includes a rotor main body and at least one air-cooled impeller disposed on the rotor main body. At least a part of the rotor main body is disposed in the inner cylinder, and the air-cooled stator drives the rotor main body and the at least one air-cooled impeller to rotate and levitate in a non-contact manner to perform air-cooled heat dissipation on the magnetic levitation stator.

[0011] Further, the at least one air-cooled impeller includes a centrifugal impeller. The centrifugal impeller includes a plurality of centrifugal blades for generating centrifugal air flow. The centrifugal blades are fixedly connected to the axial outer end of the rotor main body.

[0012] Further, the radially inner end of the centrifugal blade is fixedly connected to the axial outer end of the rotor main body, and the radially outer end of the centrifugal blade extends radially and exceeds the inner cylinder.

[0013] Further, a support baffle is formed at the outer axial end of the rotor body, the inner axial side of the centrifugal blade is mounted on the support baffle, and the outer radial end of the centrifugal blade and the outer radial edge of the support baffle extend radially and exceed the inner cylinder.

[0014] Further, at least one through hole axially penetrating is formed at the center of the rotor body.

[0015] Further, the at least one through hole is configured as a central through hole, the at least one air-cooling impeller further includes an axial-flow impeller, the axial-flow impeller includes a plurality of axial-flow blades for generating axial air flow, the axial-flow blades are arranged in the central through hole, and the inner axial end of the central through hole is configured as an air inlet A or the outer axial end of the central through hole is configured as an air inlet A.

[0016] Further, the at least one air-cooling impeller includes a first impeller, the first impeller includes a plurality of first blades for generating axial air flow, a first through hole axially penetrating is formed at the center of the rotor body, the axial-flow blades are arranged in the first through hole, and the outer axial end of the first through hole is a first air inlet.

[0017] Further, a plurality of second through holes along the axis are formed in the middle of the rotor body, the at least one air-cooling impeller includes a second impeller, the second impeller is arranged at the inner axial end and / or the outer axial end of the rotor body, and the second impeller includes a shaft core and a plurality of second blades radially arranged on the shaft core for generating axial air flow.

[0018] Further, a guide cylinder is arranged in the inner cylinder, and a first guide channel is formed between the side wall of the guide cylinder and the inner wall of the inner cylinder. A second guide channel is formed in the middle of the guide cylinder. One end of the first guide channel facing away from the rotor body is communicated with one end of the second guide channel facing away from the rotor body. The guide cylinder is fixedly connected to the inner cylinder or the guide cylinder is fixedly connected to the inner axial end of the rotor body.

[0019] Further, the air-cooling heat dissipation device further includes a guide cover, the guide cover has a ventilation opening for supplying air to the at least one air-cooling impeller, and a guide air duct is formed between the guide cover and the bottom plate.

[0020] Further, a plurality of heat dissipation fins are formed on the outer surface of the outer cylinder, the guide cover includes a base and a wind-shielding side wall extending from the base to the heat dissipation fins, and the ventilation opening and the guide air duct are formed on the base.

[0021] Further, the air-cooling stator drives the air-cooling rotor to rotate and levitate in an inner-rotor manner.

[0022] Further, the rotor body includes a sheath in the shape of a disc or a ring and permanent magnets embedded in the sheath.

[0023] Further, the air-cooled stator includes a plurality of stator teeth B and a plurality of control windings B. The stator teeth B are in a straight shape. The plurality of stator teeth B are equidistantly arranged in the circumferential direction, and one end of the plurality of stator teeth B facing the air-cooled rotor encloses a rotor cavity. The air-cooled stator further includes a magnetic conductive ring B. One end of the plurality of stator teeth B facing away from the air-cooled rotor is magnetically connected to the magnetic conductive ring B, and the control winding B is sleeved on the stator teeth B.

[0024] Further, the air-cooled stator further includes an annular bracket. The annular bracket is fixedly connected to the bottom plate, and the magnetic conductive ring B is fixed to the bottom plate through the annular bracket.

[0025] Further, the stator assembly includes a plurality of stator teeth A and a plurality of control windings A. The stator teeth A are in an L shape. The stator assembly further includes a magnetic conductive ring A. The longitudinal arms A of the plurality of stator teeth A are magnetically connected to the magnetic conductive ring A, and the control winding A is sleeved on the longitudinal arms A of the stator teeth A. The air-cooled stator includes a plurality of stator teeth B and a plurality of control windings B. The stator teeth B are in a straight shape. The plurality of stator teeth B are equidistantly arranged in the circumferential direction on the inner circle of the magnetic conductive ring A, and one end of the plurality of stator teeth B facing the air-cooled rotor encloses a rotor cavity, and the control winding B is sleeved on the stator teeth B.

[0026] Further, the stator assembly includes a plurality of stator teeth A and a plurality of control windings A. The stator teeth A are in an L shape. The stator assembly further includes a magnetic conductive ring A. The longitudinal arms A of the plurality of stator teeth A are magnetically connected to the magnetic conductive ring A, and the control winding A is sleeved on the longitudinal arms A of the stator teeth A. The air-cooled stator includes a plurality of stator teeth B and a plurality of control windings B. The stator teeth B are in an L shape. The transverse arms B of the plurality of stator teeth B are equidistantly arranged in the circumferential direction, and one end of the transverse arms B of the plurality of stator teeth B facing the air-cooled rotor encloses a rotor cavity, and the control winding B is sleeved on the transverse arms B of the stator teeth B. The free end of the longitudinal arm B of the stator teeth B is magnetically connected to the magnetic conductive ring A.

[0027] According to another aspect of the present invention, there is provided a magnetic levitation device, including the magnetic levitation motor with the integrated air-cooling and heat dissipation device. The magnetic levitation motor further includes a magnetic levitation rotor, and the magnetic levitation stator is configured to drive the magnetic levitation rotor to levitate and rotate in a non-contact manner.

[0028] Further, the magnetic levitation device further includes a control system. The control system includes a first control unit for controlling the magnetic levitation stator and a second control unit for controlling the air-cooled stator.

[0029] Furthermore, the magnetic levitation device further includes a temperature sensor for detecting the temperature inside the housing, and the second control unit regulates the operation of the air-cooled heat dissipation device according to the temperature signal provided by the temperature sensor.

[0030] Furthermore, the second control unit is built into the housing or the second control unit and the first control unit are jointly integrated into a controller.

[0031] Furthermore, the magnetic levitation device includes a magnetic levitation pump or a magnetic levitation mixer.

[0032] The above technical solution of the present invention has the following advantages compared with the prior art: By integrating the air-cooled stator inside the housing and setting it integrally with the magnetic levitation stator, a magnetic levitation motor with an integrated air-cooled heat dissipation device is formed. This magnetic levitation motor has a compact structure and can achieve centralized management of the power supply lines of both the air-cooled stator and the magnetic levitation stator. Moreover, the air-cooled stator drives the air-cooled rotor to dissipate heat without contact. While achieving good heat dissipation, there is no mechanical wear, no particles are generated, and the heat dissipation requirements of special working environments such as high cleanliness can be met. In addition, compared with compressed air heat dissipation, there is no need to set up a gas source, gas pipes, filters, etc., no noise is generated, and the cost of achieving good heat dissipation is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to make the content of the present invention easier to be clearly understood, the following further details the present invention according to specific embodiments of the present invention in conjunction with the drawings, where

[0034] Figure 1 is a schematic structural diagram of Embodiment 1 of the magnetic levitation motor with an integrated air-cooled heat dissipation device of the present invention;

[0035] Figure 2 is a schematic structural diagram of Embodiment 2 of the magnetic levitation motor with an integrated air-cooled heat dissipation device of the present invention;

[0036] Figure 3 is a schematic structural diagram of Embodiment 3 of the magnetic levitation motor with an integrated air-cooled heat dissipation device of the present invention;

[0037] Figure 4 is a schematic structural diagram of an air-cooled rotor in an embodiment of the present invention;

[0038] Figure 5 is Figure 4 a cross-sectional view taken along line A-A in

[0039] Figure 6 is a schematic structural diagram of an air-cooled rotor in another embodiment of the present invention;

[0040] Figure 7 is Figure 6Cross-sectional view taken along line B-B;

[0041] Figure 8 It is a schematic structural diagram of an air-cooled rotor in another embodiment of the present invention;

[0042] Figure 9 It is a schematic structural diagram of Embodiment 1 of the application of the magnetic levitation motor with an integrated air-cooled heat dissipation device to a magnetic levitation pump according to the present invention;

[0043] Figure 10 It is a schematic structural diagram of Embodiment 2 of the application of the magnetic levitation motor with an integrated air-cooled heat dissipation device to a magnetic levitation pump according to the present invention;

[0044] Figure 11 It is a schematic structural diagram of Variant 1 of Embodiment 2 of the magnetic levitation pump according to the present invention;

[0045] Figure 12 It is a schematic structural diagram of Variant 2 of Embodiment 2 of the magnetic levitation pump according to the present invention;

[0046] Figure 13 It is a schematic structural diagram of Variant 3 of Embodiment 2 of the magnetic levitation pump according to the present invention;

[0047] Figure 14 It is a schematic assembly structural diagram of an air-cooled stator in an embodiment of the present invention;

[0048] Figure 15 It is a schematic assembly structural diagram of an air-cooled stator in another embodiment of the present invention;

[0049] Figure 16 It is a schematic assembly structural diagram of an air-cooled stator in still another embodiment of the present invention;

[0050] Figure 17 It is a principle block diagram of a magnetic levitation device in an embodiment of the present invention;

[0051] Figure 18 It is a perspective view of an embodiment of the application of the magnetic levitation motor with an integrated air-cooled heat dissipation device to a magnetic levitation pump according to the present invention;

[0052] Figure 19 It is a perspective view of an embodiment of the application of the magnetic levitation motor with an integrated air-cooled heat dissipation device to a magnetic levitation mixer according to the present invention. Detailed implementation manners

[0053] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the illustrated embodiments are not intended to limit the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0054] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The terms "comprising" and "provided with" in the specification and claims of the present invention and any variations thereof are intended to cover non-exclusive inclusion. For example, a system, product, or device comprising a series of units does not necessarily have to be limited to those units clearly listed, but may include other units not clearly listed or inherent to these products or devices.

[0055] In the prior art, the magnetic levitation motors used in magnetic levitation pump products mainly adopt the air-cooled heat dissipation method. Generally, it includes two categories. One category is: attaching a flow guide cover to the base of the magnetic levitation motor housing and configuring a cooling fan. Traditional cooling fans have mechanical wear, generate particles, have low cleanliness, and do not have corrosion resistance, and cannot work in explosion-proof areas. As a result, in some special working environments (such as areas with flammable and explosive gases and dust, strong acid and strong alkali environments, and environments with high cleanliness requirements, etc.), the fan heat dissipation of the magnetic levitation motor becomes a problem, and the cooling fan cannot be centrally managed with the magnetic levitation motor, and a separate circuit needs to be configured for power supply, resulting in low environmental cleanliness and high failure rates. The other category is: attaching a flow guide cover to the base of the magnetic levitation motor housing and externally connecting compressed air for heat dissipation. The compressed air heat dissipation method requires an external air compressor, and air pipes need to be arranged to the working area of the magnetic levitation motor, resulting in relatively high noise. If air compressors are not allowed in some special working environments, it cannot be used. And due to cleanliness requirements, the compressed air also needs to be filtered, resulting in higher costs. Therefore, there is an urgent need to design a magnetic levitation heat dissipation solution that can meet the heat dissipation requirements of special working environments such as high cleanliness.

[0056] To solve the above technical problems, the present invention proposes a magnetic levitation motor integrated with an air-cooled heat dissipation device. See Figure 1, including a magnetic levitation stator 1, the magnetic levitation stator includes a housing 11 and a stator assembly 12, the housing includes an outer cylinder 111, an inner cylinder 112 and a bottom plate 113 connected between the outer cylinder 111 and the inner cylinder 112, the stator assembly 12 is arranged in an annular space 114 surrounded by the inner cylinder 111, the outer cylinder 112 and the bottom plate 113, the air-cooled heat dissipation device 3 includes an air-cooled stator 31 and an air-cooled rotor 32, the air-cooled stator 31 is arranged in the annular space 114, the air-cooled rotor 32 includes a rotor main body 321 and at least one air-cooled impeller arranged on the rotor main body 321, at least part of the rotor main body 321 is arranged in the inner cylinder 112, and the air-cooled stator 31 drives the rotor main body 311 and at least one air-cooled impeller to rotate and levitate in a non-contact manner to air-cool the magnetic levitation stator 1. In this way, by integrating the air-cooled stator into the housing and setting it integrally with the magnetic levitation stator, a magnetic levitation motor with an integrated air-cooled heat dissipation device is formed. The magnetic levitation motor has a compact structure and can realize the centralized management of the power supply lines of both the air-cooled stator and the magnetic levitation stator. Moreover, the air-cooled stator drives the air-cooled rotor to dissipate heat in a non-contact manner, achieving good heat dissipation while having no mechanical wear, no particle generation, and meeting the heat dissipation requirements of special working environments such as high cleanliness. In addition, compared with compressed air heat dissipation, there is no need to set up a gas source, air pipes and filters, etc., and there is no noise and the cost of achieving good heat dissipation is relatively low.

[0057] Among them, the air-cooled stator drives the rotor main body and at least one air-cooled impeller to rotate and levitate in a non-contact manner. The air-cooled stator and the air-cooled rotor together form an air-cooled heat dissipation device, and the air-cooled heat dissipation device can also be called a magnetic levitation fan. And the magnetic levitation fan can be realized based on the principles of a magnetic bearing motor, a bearingless motor or a bearingless wafer motor. Preferably, referring to Figure 1 and Figure 2 , the air-cooled stator drives the air-cooled rotor to rotate and levitate in an inner-rotor manner based on the principle of a bearingless wafer motor. In this way, based on the principle of a bearingless wafer motor, the air-cooled rotor is driven by the levitation and rotating magnetic field of the air-cooled stator to rotate and levitate stably. That is, the air-cooled stator is essentially a magnetic levitation stator, and the air-cooled rotor is essentially a magnetic levitation rotor. Specifically, the air-cooled rotor can be, for example, a permanent magnet rotor or a short-circuit cage rotor or a reluctance rotor. Preferably, the air-cooled rotor is a permanent magnet rotor. For example, the air-cooled rotor is a permanent magnet rotor and includes 1 pole pair, and the pole pair includes 2 poles with opposite polarities (N pole and S pole). The 2 poles are arranged radially and generate a magnetic field distributed according to a cosine. Its technical principle is already in the prior art and will not be elaborated here. For more technical content, reference can be made to patent documents CN116191701A, CN116961510A, etc.

[0058] In one embodiment, referring to Figure 5 and Figure 7, the rotor body 321 of the permanent magnet air-cooled rotor includes a sheath 3213 in the shape of a disc or a circular ring and permanent magnets 3214 embedded in the sheath 3213. The permanent magnet includes two magnetic poles with opposite polarities (N pole and S pole). In this way, by arranging the permanent magnet in the sheath, a permanent magnet rotor is formed. Based on the principle of the bearingless motor, the air-cooled stator in the machine shell can realize the functions of driving the rotor body to levitate and rotate. Among them, the air-cooled rotor is also used to generate an air flow to air-cool and dissipate heat from the machine shell of the magnetic levitation stator. Based on this, the air-cooled rotor further includes at least one air-cooling impeller arranged on the rotor body. In this way, the rotation of the rotor body drives the rotation of at least one air-cooling impeller, and at least one air-cooling impeller drives the gas flow around the machine shell, so as to air-cool and dissipate the heat transferred from the magnetic levitation stator to the inner cylinder and the outer cylinder.

[0059] According to an embodiment of the present disclosure, at least one air-cooling impeller is used to generate an air flow to air-cool and dissipate heat from the machine shell of the magnetic levitation stator. According to different air flow directions generated by the air-cooling impeller, at least one air-cooling impeller has different variations.

[0060] See Figure 1 , in one embodiment, at least one air-cooling impeller includes a centrifugal impeller 322. The centrifugal impeller 322 includes a plurality of centrifugal blades 3221 for generating a centrifugal air flow. The centrifugal blades 3221 are fixedly connected to the axial outer end of the rotor body 321. By connecting a plurality of centrifugal blades to the outer end of the rotor body, the centrifugal air flow generated by the rotation of the centrifugal blades can directly blow to the bottom and the outer cylinder of the machine shell to achieve air-cooling and heat dissipation of the machine shell. Among them, the radial length of the centrifugal blades and the radial length of the rotor body depend on the magnitude of the wind force to be obtained, and can be further optimized according to the size of the actual product. Preferably, see Figure 1 , the radial inner end of the centrifugal blade 3221 is fixedly connected to the axial outer end of the rotor body 311, and the radial outer end of the centrifugal blade 3221 extends radially and exceeds the inner cylinder 112. In this way, the longer centrifugal blades can provide a greater wind force, thereby improving the heat dissipation performance.

[0061] According to an embodiment of the present disclosure, the number and shape of the plurality of centrifugal blades 3221 are not limited, and can be designed according to the comprehensive results of parameters such as the wind force, noise and rotation speed of the actually generated air flow. For example, see Figure 6 and Figure 8 , the case of straight blades is illustrated, and two blade forms of equal thickness and unequal thickness are respectively illustrated.

[0062] According to embodiments of the present disclosure, the form of the fixed connection between the radially inner end of the centrifugal blade 3221 and the axially outer end of the rotor body 311 is not limited. For example, the centrifugal blade can be directly mounted on the end face of the axially outer end of the rotor body, or can be directly mounted on the circumferential side face of the axially outer end of the rotor body, or can be indirectly fixedly connected to the axially outer end of the rotor body by other means. Among them, the fixed connection includes a detachable connection or a non-detachable connection. Refer to Figures 4 - 8 , in one embodiment, a support baffle 325 is formed at the axially outer end of the rotor body 321, and the axially inner side of the centrifugal blade 3221 is mounted on the support baffle 325. The radially outer end of the centrifugal blade and the radially outer edge of the support baffle 325 extend radially and exceed the inner cylinder 112. When the radial length of the centrifugal blade is relatively long, the support baffle 325 can play a role in supporting the centrifugal blade, achieving the purpose of enhancing the structural strength of the centrifugal impeller. Refer to Figure 1 and Figure 2 , since the support baffle is arranged at the position where a gap is formed between the rotor body and the inner cylinder, the support baffle 325 can isolate the gap between the rotor body 321 and the inner cylinder 112 from the centrifugal blade 3221, thereby playing a role in guiding the flow, making the air flow more smooth, so as to further improve the heat dissipation effect. In other embodiments, the centrifugal blade can be designed near the outer edge of the support baffle, and the radially inner ends of multiple centrifugal blades enclose a cavity.

[0063] In order to obtain a better heat dissipation effect, refer to Figure 1 and Figure 2 , the air-cooled heat dissipation device further includes a flow guide cover 33. The flow guide cover 33 has a ventilation opening 331 for supplying air to at least one air-cooled impeller. A flow guide air duct 332 is formed between the flow guide cover 33 and the bottom plate 113. In this way, by arranging the flow guide cover 33 at the bottom of the housing and forming the flow guide air duct 332 between the flow guide cover 33 and the bottom plate 113 of the housing, the centrifugal impeller 322 can drive the gas flowing towards the centrifugal impeller through the ventilation opening 331, thereby realizing the air-cooled heat dissipation of the bottom and side parts of the housing, for example, including the air-cooled heat dissipation of the bottom plate and the outer cylinder.

[0064] In order to obtain a better heat dissipation effect, refer to Figure 5 and Figure 7 , a flow guide cylinder 323 is arranged inside the inner cylinder, and a first flow guide channel 3231 is formed between the side wall of the flow guide cylinder and the inner wall of the inner cylinder. A second flow guide channel 3232 is formed in the middle of the flow guide cylinder 323. One end of the first flow guide channel 3231 facing away from the rotor body 321 is communicated with one end of the second flow guide channel 3232 facing away from the rotor body 321. The flow guide cylinder 323 is fixedly connected to the inner cylinder 112 or the flow guide cylinder 323 is fixedly connected to the axially inner end of the rotor body 321. Refer to Figure 5 and Figure 7, the draft tube and the rotor body are integrally formed, but not limited thereto. The draft tube and the rotor body can also be designed as a detachable connection assembly structure. In other embodiments, the draft tube can also be fixedly connected to the inner cylinder, including but not limited to detachable fixed connection. See Figure 5 and Figure 7 , the draft tube is designed as a straight tube with the same radial opening dimensions at one end and the other end, but not limited thereto. The draft tube can also be designed as an inclined tube with different radial opening dimensions at one end and the other end. Or it can be designed as other regular or irregular shapes. See Figure 5 and Figure 7 , the draft tube is designed to be located at a position close to the rotor cavity of the magnetic levitation stator at the axially inner end, but not limited thereto. According to the effect of the draft, the distance between one end of the draft tube and the axially outer end of the rotor cavity of the magnetic levitation stator can be adjusted, and the distance between the relatively other end of the draft tube and the axially inner end of the rotor body can be adjusted.

[0065] According to an embodiment of the present disclosure, see Figure 2 , Figure 4 , Figure 5 , Figure 7 and Figure 11 , at least one through hole penetrating axially is formed in the center of the rotor body 321. In this way, when the centrifugal impeller at the outer end (axially outer end) of the rotor body rotates, a negative pressure is generated in the part of the inner cylinder close to the rotor body. Driven by the negative pressure, the gas in the inner cylinder flows, and a circulating air flow is formed between the gap between the rotor body and the inner cylinder and the through hole, thereby improving the heat dissipation of the inner cylinder. Cooperating with the draft tube 323 and the draft cover 33, the centrifugal impeller 322 can achieve heat dissipation for the inner cylinder, the bottom plate and the outer cylinder of the machine shell. Figure 2 The arrow in Figure 1 indicates the air flow direction of this embodiment. The at least one through hole can be a large-sized central through hole, or multiple relatively small-sized through holes. For example, multiple through holes are arranged on one circumference or two circumferences. In this embodiment, the through hole can be a straight through hole with the same opening dimensions at one end and the other end, or an inclined through hole with different opening dimensions at one end and the other end, or other through holes with regular or irregular shapes. But not limited thereto. For example, see Figure 1 The arrow in

[0066] According to an embodiment of the present disclosure, see Figure 7 and Figure 9 , corresponding to Figure 2Based on the embodiments, at least one through hole is configured as a central through hole 3211, and at least one air-cooling impeller further includes an axial-flow impeller 324. The axial-flow impeller includes a plurality of axial-flow blades 3241 for generating axial air flow, and the axial-flow blades 3241 are arranged in the central through hole 3211. In this way, by directly integrating a plurality of axial-flow blades 3241 in the central through hole 3211 of the rotor body 321 to form an axial-flow impeller 324 for generating axial air flow, the rotation of the plurality of axial-flow blades can provide power for driving the air flow in the inner cylinder, further improving the heat dissipation efficiency of the inner cylinder. Among them, the axial inner end of the central through hole 3211 is configured as an air inlet A3212 or the axial outer end of the central through hole 3211 is configured as an air inlet A3212. Figure 5 The situation where the air inlet A3212 is configured at the axial inner end of the central through hole 3211 is shown in Figure 9 The arrow in

[0067] According to an embodiment of the present disclosure, at least one air-cooling impeller is configured as an impeller for generating axial air flow. Refer to Figure 10 , at least one air-cooling impeller includes a first impeller 326. The first impeller includes a plurality of first blades 3261 for generating axial air flow. An axially penetrating first through hole 3211' is formed in the center of the rotor body 321, and the first blades 3261 are arranged in the first through hole 3211'. The axially outer end of the first through hole 3211' is a first air inlet 3212'. In this way, by arranging a plurality of first blades 3261 in the axially penetrating first through hole 3211' of the rotor body, the axial air flow generated by the rotation of the first blades 3261 can directly blow air to the inner cylinder 112 of the machine shell, and a circulating air flow is formed between the gap between the rotor body 321 and the inner cylinder 112 and the first through hole 3211', thereby realizing the heat dissipation of the inner cylinder. Similarly, in cooperation with the guide cylinder 323 and the guide cover 33, the first impeller 326 can realize the heat dissipation of the inner cylinder, the bottom plate and the outer cylinder of the machine shell. Figure 10 The arrow in

[0068] According to an embodiment of the present disclosure, at least one air-cooling impeller is configured as an impeller for generating axial air flow. Refer to Figure 11 , Figure 12 and Figure 13, a plurality of second through holes 3211" along the axial direction are formed in the middle of the rotor body 321. At least one air-cooling impeller includes a second impeller 328. The second impeller 328 is arranged at the axial inner end and / or the axial outer end of the rotor body 321. The second impeller 328 includes an axle core and a plurality of second blades 3281 radially arranged on the axle core for generating axial air flow. In this way, by forming a plurality of second through holes in the middle of the rotor body and arranging the second impeller at the axial inner end or / and the axial outer end of the rotor body, with the rotation of the plurality of second blades of the second impeller, the power for driving the gas flow near the inner cylinder and the bottom plate can be provided. Preferably, the plurality of second through holes are arranged on one circumference or two circumferences. See Figure 11 , the second impeller 328 is arranged at the axial inner end of the rotor body 321, that is, the second impeller is arranged on the side of the rotor body facing the magnetic levitation rotor. The plurality of second through holes axially correspond to the middle parts of the second blades, providing a channel for axial gas flow. See Figure 12 , there are two second impellers 328. One second impeller 328 is arranged at the axial inner end of the rotor body 321, that is, the second impeller is arranged on the side of the rotor body facing the magnetic levitation rotor. The other second impeller 328 is arranged at the axial outer end of the rotor body 321, that is, the second impeller is arranged on the side of the rotor body facing the guide cover. The plurality of second through holes axially correspond to the middle parts of the second blades, providing a channel for axial gas flow. See Figure 13 , there are also two second impellers 328. One second impeller 328 is arranged at the axial inner end of the rotor body 321, that is, the second impeller is arranged on the side of the rotor body facing the magnetic levitation rotor. The other second impeller 328 is arranged on the circumferential side of the axial outer end of the rotor body 321, that is, the second impeller 328 is arranged on the side of the rotor body 321 facing the guide cover 33 and is located on the circumferential side of the rotor body 321. At this time, the rotor body has a part extending towards the guide cover. The plurality of second through holes axially correspond to the middle parts of the second blades at the axial inner end of the rotor body, providing a channel for axial gas flow. In this embodiment, since the second blades 3281 of one second impeller are arranged on the circumferential side of the axial outer end of the rotor body, the second blades can extend radially, so as to directly perform air-cooling heat dissipation on the bottom plate and the outer cylinder of the machine shell. Similarly, in cooperation with the guide cylinder 323 and the guide cover 33, the second impeller 328 can achieve heat dissipation of the inner cylinder, the bottom plate and the outer cylinder of the machine shell. Figure 11 , Figure 12 and Figure 13 The arrows in

[0069] According to an embodiment of the present disclosure, refer to Figure 2 , Figure 14 and Figure 15 , a plurality of heat dissipation fins 1111 are formed on the outer surface of the outer cylinder of the housing. The heat dissipation fins generally extend along the axial direction of the housing to expand the heat dissipation area and achieve a better heat dissipation effect. Based on this, the flow guide cover includes a base 33A and a wind blocking side wall 33B extending from the base 33A towards the heat dissipation fins 1111. The ventilation opening 331 and the flow guide air duct 332 are formed on the base 33A. In this way, when the flow guide cover is installed on the housing, the wind blocking side wall of the flow guide cover guides the air flow towards the heat dissipation fins, so as to improve the heat dissipation efficiency. Among them, the flow guide cover can be detachably fixedly connected to the bottom plate of the housing through fasteners, but not limited to this. The flow guide cover can also be detachably fixedly connected to the housing through other means such as snap fasteners. In an embodiment where the air-cooled heat dissipation device is configured with a centrifugal impeller, an avoidance groove 33A1 is formed on one side of the base 33A facing the bottom plate of the housing to avoid the centrifugal blades of the centrifugal impeller. In this case, a plurality of first flow guide grooves 33A2 extending towards the wind blocking side wall can be formed on both sides of the avoidance groove. The plurality of first flow guide grooves 33A2 together form the flow guide air duct 332 in the above embodiment. In an embodiment where the air-cooled heat dissipation device is not configured with a centrifugal impeller, an avoidance groove may not be provided on one side of the base 33A facing the bottom plate of the housing, and only a plurality of second flow guide grooves 33A3 extending towards the wind blocking side wall are formed on both sides corresponding to the gap between the inner cylinder and the rotor body. The plurality of second flow guide grooves 33A3 together form the flow guide air duct 332 in the above embodiment. In this way, the thickness of the base 33A of the flow guide cover can be reduced, and further the axial length of the overall product is not increased, so as to maintain the advantage of product miniaturization. Preferably, a baffle 33A4 for guiding the air flow towards the second flow guide groove 33A3 is formed at the gap between the inner cylinder and the rotor body, so that the air flow is smoother, so as to further improve the heat dissipation effect.

[0070] In the above embodiments, the outer cylinder, the inner cylinder and the bottom plate of the housing can be integrally formed, for example, integrally formed in the form of die casting into a metal housing convenient for heat dissipation. But not limited to this. In other embodiments, the outer cylinder, the bottom plate and the inner cylinder of the housing can also be composed of a split structure, and each part is made of different materials. For example, the outer cylinder and the bottom plate are integrally formed, while the inner cylinder is a split assembly structure.

[0071] In order to realize the integrated design of the air-cooled stator and the magnetic levitation stator, according to an embodiment of the present disclosure, refer to Figures 10 - 14, the air-cooled stator 31 includes a plurality of stator teeth B311 and a plurality of control windings B312. The stator teeth B311 are in a straight shape. The plurality of stator teeth B311 are equidistantly arranged in the circumferential direction, and one end of the plurality of stator teeth B311 facing the air-cooled rotor 32 encloses a rotor cavity. The air-cooled stator 31 further includes a magnetic conductive ring B313. One end of the plurality of stator teeth B311 facing away from the air-cooled rotor 32 is magnetically connected to the magnetic conductive ring B313, and the control winding B312 is sleeved on the stator teeth B311. In this way, the air-cooled stator is overall flat and does not occupy a large axial space inside the housing, and the function of the integrated air-cooled stator can be realized in a relatively small axial space. For example, the air-cooled stator is designed in the space near the bottom plate of the housing. In this way, the air-cooled stator can drive the air-cooled rotor to stably levitate and rotate through the inner cylinder of the housing, achieving reasonable utilization of the space inside the housing of the magnetic levitation motor without affecting the original design layout of the magnetic levitation stator and without affecting the performance of the magnetic levitation stator. Since the air-cooled stator and the magnetic levitation stator are independently arranged in this embodiment, the magnetic levitation motor is not limited to the structural form of the magnetic levitation stator. For example, the magnetic levitation stator can be a magnetic levitation stator structure of a straight-shaped stator tooth formed by connecting the outer ends of a plurality of straight-shaped stator teeth with a magnetic conductive ring (stator yoke), or a magnetic levitation stator structure of an L-shaped stator tooth formed by connecting the vertical parts of a plurality of L-shaped stator teeth with a magnetic conductive ring. This embodiment does not specifically limit the installation structure of the air-cooled stator inside the housing. Preferably, in one embodiment, refer to Figure 14 , the air-cooled stator 31 further includes an annular bracket 314. The annular bracket 314 is fixedly connected to the bottom plate 113. For example, the annular bracket can be locked on the bottom plate inside the housing through fasteners. The magnetic conductive ring B313 is fixed to the bottom plate 113 through the annular bracket 314. In this way, the installation and fixation of the air-cooled stator 31 in the annular space of the housing can be realized through the annular bracket 314, and the structure is simple and easy to implement.

[0072] In order to achieve the integrated design of the air-cooled stator and the magnetic levitation stator, according to the embodiments of the present disclosure, refer to Figure 1 、 Figure 2 、 Figure 9 and Figure 15, the stator assembly 12 of the magnetic levitation stator 1 includes a plurality of stator teeth A121 and a plurality of control windings A122. The stator teeth A121 are L-shaped. The stator assembly 12 further includes a magnetic conductive ring A123. The longitudinal arms A1211 of the plurality of stator teeth A121 are magnetically connected to the magnetic conductive ring A123. The control windings A122 are sleeved on the longitudinal arms A1211 of the stator teeth A121. The transverse arms A of the plurality of stator teeth A121 enclose a rotor cavity. The air-cooled stator 31 includes a plurality of stator teeth B311 and a plurality of control windings B312. The stator teeth B311 are straight-shaped. The plurality of stator teeth B311 are equally spaced in the circumferential direction on the inner circle of the magnetic conductive ring A123, and one end of the plurality of stator teeth B311 facing the air-cooled rotor 32 encloses a rotor cavity. The control windings B312 are sleeved on the stator teeth B311. In this way, by directly integrating the straight-shaped stator teeth B of the air-cooled stator onto the inner circle of the magnetic conductive ring A of the stator assembly of the magnetic levitation stator, a high integration of the air-cooled stator and the magnetic levitation stator is achieved, and the structure is more compact. By sharing a magnetic conductive ring (shared magnetic yoke), the construction of two magnetic circuits is realized. The structure is compact and the reserved space is saved, which is convenient for the miniaturization of the product. At the same time, in order to avoid the mutual cancellation of the magnetic fluxes between the two magnetic circuits, it is preferably to design the two magnetic circuits to have the same direction when designing the magnetic circuit. In addition, a magnetic isolation part can be provided on the shared magnetic yoke. For example, an annular groove is provided or a non-magnetic or weakly magnetic material is filled in the annular groove, etc., to achieve the isolation between the two magnetic circuits and achieve the purpose of avoiding the cancellation of the magnetic fluxes of the magnetic circuits. In this embodiment, the air-cooled stator can be understood as a magnetic levitation stator structure of straight-shaped stator teeth formed by connecting the outer ends of a plurality of straight-shaped stator teeth by a magnetic conductive ring (stator magnetic yoke), and the magnetic levitation stator can be understood as a magnetic levitation stator structure of L-shaped stator teeth formed by connecting the vertical parts of a plurality of L-shaped stator teeth by a magnetic conductive ring.

[0073] To achieve the integrated design of the air-cooled stator and the magnetic levitation stator, according to an embodiment of the present disclosure, refer to Figure 16, the stator assembly 12 of the magnetic levitation stator 1 includes a plurality of stator teeth A121 and a plurality of control windings A122. The stator teeth A121 are L-shaped. The stator assembly 12 further includes a magnetic conductive ring A123. The longitudinal arms A1211 of the plurality of stator teeth A121 are magnetically connected to the magnetic conductive ring A123. The control windings A122 are sleeved on the longitudinal arms A1211 of the stator teeth A121; the air-cooled stator 31 includes a plurality of stator teeth B311 and a plurality of control windings B312. The stator teeth B311 are L-shaped. The transverse arms B3111 of the plurality of stator teeth B311 are equally spaced in the circumferential direction. One end of the transverse arms B3111 of the plurality of stator teeth B311 facing the air-cooled rotor 32 encloses a rotor cavity. The control windings B312 are sleeved on the transverse arms B3111 of the stator teeth B311; the free end of the longitudinal arm B3112 of the stator teeth B311 is magnetically connected to the magnetic conductive ring A123. In this way, by magnetically connecting the L-shaped stator teeth B of the air-cooled stator to the magnetic conductive ring A of the stator assembly of the magnetic levitation stator, the high integration of the air-cooled stator and the magnetic levitation stator is realized, and the structure is more compact. By sharing a magnetic conductive ring (shared magnetic yoke), the construction of two magnetic circuits is realized. The structure is compact and the reserved space is saved, which is convenient for the miniaturization of the product. At the same time, in order to avoid the mutual cancellation of the magnetic fluxes between the two magnetic circuits, it is preferably to design the two magnetic circuits to have the same direction when designing the magnetic circuit. In addition, a magnetic isolation part can be provided on the shared magnetic yoke. For example, an annular groove is provided or a non-magnetic or weakly magnetic material is filled in the annular groove, etc., to realize the isolation between the two magnetic circuits and achieve the purpose of avoiding the cancellation of the magnetic fluxes of the magnetic circuits. In this embodiment, the air-cooled stator can be understood as a magnetic levitation stator structure of L-shaped stator teeth formed by connecting the outer ends of a plurality of one-shaped stator teeth by a magnetic conductive ring (stator magnetic yoke), and the magnetic levitation stator can be understood as a magnetic levitation stator structure of L-shaped stator teeth formed by connecting the vertical parts of a plurality of L-shaped stator teeth by a magnetic conductive ring.

[0074] According to an embodiment of the present disclosure, based on the same inventive concept, the present invention also provides a magnetic levitation device, including the magnetic levitation motor with an integrated air-cooling and heat-dissipating device in each of the above embodiments. The magnetic levitation motor includes a magnetic levitation stator 1 and a magnetic levitation rotor 2. The magnetic levitation stator 1 is configured to drive the magnetic levitation rotor 2 to levitate and rotate in a non-contact manner.

[0075] The present invention does not limit the type of the magnetic levitation motor, which can be generally summarized as a magnetic levitation rotary driver that uses magnetic field force to levitate the rotor so that there is no mechanical contact between the rotor and the stator. Preferably, the magnetic levitation motor is a bearingless wafer motor.

[0076] The bearingless wafer motor is a special type of bearingless motor that inherits the advantages of bearingless motors. The axial length-to-diameter ratio of its rotor is very small, presenting a wafer-like shape. It eliminates the axial magnetic bearings and uses bearingless technology to achieve the rotation of the rotor and active suspension in the radial direction. The passive suspension of the other three degrees of freedom except for the radial and rotor rotation degrees of freedom is realized by the magnetic circuit formed by the mechanical structure. It has the characteristics of high cleanliness, no precipitation, no particles, no dynamic seal, and excellent performance, and has good application prospects in ultra-clean drive fields such as biochemistry, medicine, and semiconductor manufacturing.

[0077] According to different winding structures, the bearingless wafer motor can be divided into a single-winding structure and a double-winding structure. The present invention does not limit the winding structure of the bearingless wafer motor, which can be a single-winding structure or a double-winding structure. In one embodiment, a winding coil is provided on each stator tooth. The winding coil is a concentrated winding, and the winding coil is used for both rotation control and suspension control to form the single-winding structure of the magnetic suspension motor. In another embodiment, referring to Figure 1 and Figure 2 , two winding coils are provided on each stator tooth. The two winding coils can both be concentrated windings, or one winding coil can be a concentrated winding and the other winding coil can be a distributed winding. Referring to Figure 15 , the two winding coils on the stator tooth are wound together. One winding coil is used for rotation control and the other winding coil is used for suspension control to form the double-winding structure of the magnetic suspension motor. Here, the stator tooth and the winding coil can be the stator tooth and the control winding of the air-cooled stator, or the stator tooth and the control winding of the magnetic suspension stator.

[0078] According to an embodiment of the present disclosure, referring to Figure 17 , the magnetic suspension device further includes a control system. The control system includes a first control unit for controlling the magnetic suspension stator and a second control unit for controlling the air-cooled stator. Compared with a traditional motor using a contact mechanical bearing, the magnetic suspension motor needs to perform more degrees of freedom control. This requires integrating more sensors in the motor body. Through the sensors, the control data of the magnetic suspension motor can be detected in real time. The control data can include, for example, rotor displacement data, rotor angle data (rotor speed data), or current data of the electromagnetic coil, etc. Taking the control data as the feedback quantity, the control system (the first control unit and the second control unit) of the magnetic suspension motor generates a control signal for the power amplifier as the execution part according to the control strategy. The power amplifier outputs current to excite the electromagnetic coil of the stator part of the magnetic suspension motor to achieve the suspension and / or rotation control of the rotor.

[0079] According to an embodiment of the present disclosure, referring to Figure 17, the magnetic levitation device further includes a temperature sensor for detecting the temperature inside the casing, and the second control unit regulates the operation of the air-cooled heat dissipation device according to the temperature signal provided by the temperature sensor. The temperature sensor can be independently arranged or a temperature sensor built into the magnetic levitation stator. The second control unit of the air-cooled stator controls the speed according to the temperature signal recognized by the temperature sensor. It can start the air-cooled heat dissipation device when the temperature is higher than the set temperature and turn off the air-cooled heat dissipation device when the temperature is lower than the set temperature. Moreover, the speed of the air-cooled rotor can also be increased as the temperature rises, thus avoiding waste of energy while meeting the necessary heat dissipation effect.

[0080] According to an embodiment of the present disclosure, the second control unit is built into the casing or the second control unit and the first control unit are jointly integrated into a controller. On the one hand, since the air-cooled heat dissipation device is used as an auxiliary equipment for heat dissipation, and the precision requirement for temperature control is not as precise as that for the pumping control of the magnetic levitation pump applying the magnetic levitation motor, therefore, the control difficulty for the levitation and rotation of the air-cooled heat dissipation device is relatively low. Correspondingly, the second control unit can be made into a simple control circuit board and thus integrated into the casing. On the other hand, in order to save the space inside the casing and simplify the design difficulty inside the casing, the second control unit and the first control unit can also be jointly integrated into the same controller or different controllers. The controller is only electrically connected to the magnetic levitation motor through a power supply and signal lines.

[0081] According to an embodiment of the present disclosure, the magnetic levitation motor can be assembled with different functional fittings to become magnetic levitation devices for different application requirements. For example, the magnetic levitation device includes but is not limited to a magnetic levitation pump or a magnetic levitation mixer.

[0082] In one embodiment, see Figures 9 - 13 , Figure 16 and Figure 18 , the magnetic levitation device is configured as a magnetic levitation pump. In the application of the magnetic levitation pump, in addition to the magnetic levitation motor in the above embodiments, the magnetic levitation pump further includes a pump head 200. The pump head 200 includes a pump casing 210 and a rotor impeller 220 arranged inside the pump casing 210. The rotor impeller includes a magnetic levitation rotor 2. The magnetic levitation rotor 2 is both the rotor 2 of the magnetic levitation motor and a part of the rotor impeller 220 of the pump. It can be, for example, a permanent magnet rotor, a short-circuit cage rotor, or a reluctance rotor. The magnetic levitation stator is configured to drive the rotor impeller to rotate and levitate;

[0083] In another embodiment, the magnetic levitation device is configured as a magnetic levitation mixer, see Figure 19, in the application of the magnetic levitation mixer, the magnetic levitation mixer includes, in addition to the magnetic levitation motor in each of the above embodiments, a stirring device 200'. The stirring device includes a stirring container 210' and a rotor stirring head 220' disposed within the stirring container. The magnetic levitation rotor is both the rotor of the magnetic levitation motor and a part of the rotor stirring head of the stirring device, and the magnetic levitation stator is configured to drive the rotor stirring head to rotate and levitate.

[0084] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or alterations derived therefrom still fall within the protection scope of the present invention.

Claims

1. A magnetic levitation motor integrated with an air-cooled heat dissipation device, comprising a magnetic levitation stator (1), the magnetic levitation stator comprising a housing (11) and a stator assembly (12), the housing comprising an outer cylinder (111), an inner cylinder (112) and a bottom plate (113) connected between the outer cylinder and the inner cylinder, the stator assembly being disposed in an annular space (114) surrounded by the inner cylinder, the outer cylinder and the bottom plate, characterized in that, The air-cooled heat dissipation device (3) includes an air-cooled stator (31) and an air-cooled rotor (32). The air-cooled stator is disposed in the annular space. The air-cooled rotor includes a rotor main body (321) and at least one air-cooled impeller disposed on the rotor main body. At least a part of the rotor main body is disposed in the inner cylinder, and the air-cooled stator drives the rotor main body and the at least one air-cooled impeller to rotate and levitate in a non-contact manner to air-cool the magnetic levitation stator.

2. The magnetic levitation motor of the integrated air-cooled heat dissipation device according to claim 1, characterized in that: The at least one air-cooled impeller includes a centrifugal impeller (322). The centrifugal impeller includes a plurality of centrifugal blades (3221) for generating centrifugal air flow. The centrifugal blades are fixedly connected to the axial outer end of the rotor main body.

3. The magnetic levitation motor of the integrated air-cooled heat dissipation device according to claim 2, characterized in that, The radially inner end of the centrifugal blade is fixedly connected to the axial outer end of the rotor main body, and the radially outer end of the centrifugal blade extends radially and exceeds the inner cylinder.

4. The magnetic levitation motor of the integrated air-cooled heat dissipation device according to claim 2, characterized in that, A support baffle (325) is formed at the axial outer end of the rotor main body. The axial inner side of the centrifugal blade is mounted on the support baffle, and the radially outer end of the centrifugal blade and the radially outer edge of the support baffle extend radially and exceed the inner cylinder.

5. The magnetic levitation motor of the integrated air-cooled heat dissipation device according to claim 4, wherein At least one through hole penetrating axially is formed at the center of the rotor main body.

6. The magnetic levitation motor of the integrated air-cooled heat dissipation device according to claim 5, characterized in that, The at least one through hole is configured as a central through hole (3211). The at least one air-cooled impeller further includes an axial-flow impeller (324). The axial-flow impeller includes a plurality of axial-flow blades (3241) for generating axial air flow. The axial-flow blades are disposed in the central through hole. The axially inner end of the central through hole is configured as an air inlet A (3212) or the axially outer end of the central through hole is configured as an air inlet A (3212).

7. The magnetic levitation motor of the integrated air-cooled heat dissipation device according to claim 1, wherein The at least one air-cooled impeller includes a first impeller (326). The first impeller includes a plurality of first blades (3261) for generating axial air flow. A first through hole (3211’) penetrating axially is formed at the center of the rotor main body. The axial-flow blades are disposed in the first through hole, and the axially outer end of the first through hole is a first air inlet (3212’).

8. The magnetic levitation motor of the integrated air-cooled heat dissipation device according to claim 1, characterized in that, A plurality of second through holes (3211”) extending axially are formed in the middle of the rotor main body. The at least one air-cooled impeller includes a second impeller (328). The second impeller is disposed at the axially inner end and / or the axially outer end of the rotor main body. The second impeller includes an axle core and a plurality of second blades (3281) radially arranged on the axle core for generating axial air flow.

9. The magnetic suspension motor of the integrated air-cooled heat dissipation device according to any one of claims 2-8, characterized in that A guide cylinder (323) is disposed in the inner cylinder, and a first guide channel (3231) is formed between the side wall of the guide cylinder and the inner wall of the inner cylinder. A second guide channel (3232) is formed in the middle of the guide cylinder. One end of the first guide channel facing away from the rotor main body is communicated with one end of the second guide channel facing away from the rotor main body. The guide cylinder is fixedly connected to the inner cylinder or the guide cylinder is fixedly connected to the axially inner end of the rotor main body.

10. The magnetic levitation motor of the integrated air-cooled heat dissipation device according to any one of claims 2-8, characterized in that, The air-cooled heat dissipation device further includes a guide cover (33). The guide cover has a ventilation opening (331) for supplying air to the at least one air-cooled impeller. A guide air duct (332) is formed between the guide cover and the bottom plate.

11. The magnetic levitation motor of the integrated air-cooled heat dissipation device according to claim 10, characterized in that, A plurality of heat dissipation fins (1111) are formed on the outer surface of the outer cylinder. The flow guide cover includes a base (33A) and a wind shielding side wall (33B) extending from the base towards the heat dissipation fins. The ventilation opening and the flow guide air duct are formed on the base.

12. The magnetic levitation motor of the integrated air-cooled heat dissipation device according to claim 1, wherein The air-cooled stator drives the air-cooled rotor to rotate and levitate in an inner-rotor manner.

13. The magnetic levitation motor of the integrated air-cooled heat dissipation device according to claim 12, characterized in that, The rotor body (321) includes a sheath (3213) in a disc shape or an annular shape and permanent magnets (3214) embedded in the sheath.

14. The magnetic levitation motor of the integrated air-cooled heat dissipation device according to claim 13, wherein The air-cooled stator includes a plurality of stator teeth B (311) and a plurality of control windings B (312). The stator teeth B are in a straight shape. The plurality of stator teeth B are equidistantly arranged in the circumferential direction and one end of the plurality of stator teeth B facing the air-cooled rotor encloses a rotor cavity. The air-cooled stator further includes a magnetic conductive ring B (313). One end of the plurality of stator teeth B facing away from the air-cooled rotor is magnetically connected to the magnetic conductive ring B. The control winding B is sleeved on the stator teeth B.

15. The magnetic levitation motor of the integrated air-cooled heat dissipation device according to claim 14, characterized in that, The air-cooled stator further includes an annular bracket (314). The annular bracket is fixedly connected to the bottom plate, and the magnetic conductive ring B is fixed to the bottom plate through the annular bracket.

16. The magnetic levitation motor of the integrated air-cooled heat dissipation device according to claim 13, characterized in that, The stator assembly includes a plurality of stator teeth A (121) and a plurality of control windings A (122). The stator teeth A are in an L shape. The stator assembly further includes a magnetic conductive ring A (123). The longitudinal arms A (1211) of the plurality of stator teeth A are magnetically connected to the magnetic conductive ring A. The control winding A is sleeved on the longitudinal arms A of the stator teeth A. The air-cooled stator includes a plurality of stator teeth B (311) and a plurality of control windings B (312). The stator teeth B are in a straight shape. The plurality of stator teeth B are equidistantly arranged in the circumferential direction on the inner circle of the magnetic conductive ring A, and one end of the plurality of stator teeth B facing the air-cooled rotor encloses a rotor cavity. The control winding B is sleeved on the stator teeth B.

17. The magnetic levitation motor of the integrated air-cooled heat dissipation device according to claim 13, characterized in that, The stator assembly includes a plurality of stator teeth A (121) and a plurality of control windings A (122). The stator teeth A are in an L shape. The stator assembly further includes a magnetic conductive ring A (123). The longitudinal arms A (1211) of the plurality of stator teeth A are magnetically connected to the magnetic conductive ring A. The control winding A is sleeved on the longitudinal arms A of the stator teeth A. The air-cooled stator includes a plurality of stator teeth B (311) and a plurality of control windings B (312). The stator teeth B are in an L shape. The transverse arms B (3111) of the plurality of stator teeth B are equidistantly arranged in the circumferential direction. One end of the transverse arms B of the plurality of stator teeth B facing the air-cooled rotor encloses a rotor cavity. The control winding B is sleeved on the transverse arms B of the stator teeth B. The free end of the longitudinal arm B (3112) of the stator teeth B is magnetically connected to the magnetic conductive ring A.

18. A magnetic levitation device, characterized in that, A magnetic levitation motor including the integrated air-cooled heat dissipation device according to any one of claims 1-17. The magnetic levitation motor further includes a magnetic levitation rotor (2). The magnetic levitation stator is configured to drive the magnetic levitation rotor to levitate and rotate in a non-contact manner.

19. The magnetic levitation device according to claim 18, characterized in that, The magnetic levitation device further includes a control system, and the control system includes a first control unit for controlling the magnetic levitation stator and a second control unit for controlling the air-cooled stator.

20. The magnetic levitation device according to claim 19, characterized in that, The magnetic levitation device further includes a temperature sensor for detecting the temperature inside the housing, and the second control unit regulates the operation of the air-cooled heat dissipation device according to the temperature signal provided by the temperature sensor.

21. The magnetic levitation device according to claim 19, wherein The second control unit is built into the housing or the second control unit and the first control unit are integrally integrated into a controller.

22. The magnetic levitation device according to claim 18, characterized in that: The magnetic levitation device includes a magnetic levitation pump or a magnetic levitation agitator.

Images