Air-cooled magnetic suspension fan

Abstract

The utility model provides an air-cooled magnetic suspension draught fan which comprises a machine shell, a stator, a rotating shaft, an impeller, a thrust disc, a magnetic suspension assembly and a heat dissipation assembly, the machine shell, the stator and the rotating shaft are sequentially arranged in a sleeving mode, and a ventilation channel is formed between the stator and the rotating shaft; the heat dissipation assembly comprises a heat dissipation fan, a heat dissipation cover and a filtering assembly, the heat dissipation fan is fixedly installed at the other end of the rotating shaft, the heat dissipation cover is assembled at the end, away from the impeller, of the machine shell, and an air outlet is formed in the heat dissipation cover; the heat dissipation fan is mounted at the other end of the rotating shaft in the heat dissipation cover; the air inlet hole, the ventilation channel and the air outlet are communicated to form a heat dissipation channel, and the filtering assembly is arranged in the heat dissipation channel. According to the air-cooled magnetic suspension fan, particulate matters can be effectively prevented from entering the air-cooled magnetic suspension fan, and internal components of the air-cooled magnetic suspension fan are prevented from being damaged by the particulate matters.

Description

Technical Field

[0001] The present application relates to the technical field of fans, and in particular to an air-cooled magnetic levitation fan. Background Art

[0002] In the field of fan technology, magnetic levitation fans use electromagnetic levitation technology to achieve contactless suspension between the rotating shaft and stator of the air compressor through magnetic force. The magnets and coils inside the motor stator constitute the static and dynamic parts respectively. When the coil passes current, a magnetic field is generated. This magnetic field interacts with the magnets on the rotating shaft to generate an upward suspension force. This suspension force is equal to the gravity of the rotating shaft, causing the rotating shaft to suspend in the air. When the current changes direction, the direction of the magnetic field will also change, thereby generating different suspension forces, realizing the reciprocating motion of the rotating shaft, and then driving the compression mechanism to work. Compared with traditional fans, magnetic levitation fans use the electromagnetic principle to enable the fan shaft to suspend in the air, achieving contactless and mechanical friction-free operation, with the advantages of high efficiency, low noise, few failures, and no need for a lubrication system.

[0003] However, at present, when the magnetic levitation fan is performing air cooling during operation, in order to increase the air intake and thus ensure the air cooling effect, large particles are easily sucked into the magnetic levitation fan, damaging the internal components of the magnetic levitation fan; in addition, under high-intensity operation, a large amount of wind enters the magnetic levitation fan from the air inlet, and cracks are easily formed at the air inlet, affecting the service life. Utility Model Content

[0004] The purpose of the present application is to provide an air-cooled magnetic levitation fan that can filter large particles and has high stability.

[0005] An air-cooled magnetic suspension fan comprises: a casing, a stator, a rotating shaft, an impeller, a magnetic suspension assembly and a heat dissipation assembly, wherein the casing, the stator and the rotating shaft are sleeved in sequence, the two ends of the rotating shaft are rotatably connected to the casing through the magnetic suspension assembly, the impeller is fixedly mounted on one end of the rotating shaft, and a ventilation duct is formed between the stator and the rotating shaft;

[0006] The heat dissipation assembly includes: a heat dissipation fan, a heat dissipation cover and a filter assembly, the heat dissipation fan is fixedly installed at the other end of the rotating shaft, the heat dissipation cover is assembled at the end of the casing away from the impeller, and the heat dissipation cover is provided with an air outlet; the heat dissipation fan is installed at the other end of the rotating shaft inside the heat dissipation cover; the casing is provided with at least one air inlet hole connected to the ventilation duct, and the air inlet hole is arranged at the end of the casing away from the heat dissipation fan; the air inlet hole, the ventilation duct and the air outlet are connected to form a heat dissipation channel, and the filter assembly is arranged in the heat dissipation channel.

[0007] Compared with the prior art, the rotating shaft in the present application is suspended in the stator by magnetic force and forms the ventilation duct between the stator and the stator. By setting at least one air inlet hole connected to the ventilation duct on the casing, when the air-cooled magnetic levitation fan is in operation, the heat dissipation fan rotates at a high speed, which will make the air pressure outside the casing at the air inlet hole greater than the air pressure inside the casing, and the wind flow enters the air-cooled magnetic levitation fan from the air inlet hole, and circulates in the ventilation duct formed between the stator and the rotating shaft, and finally flows out from the air outlet, thereby taking away the heat generated during the use of the stator, rotating shaft and thrust plate, and completing the air cooling and heat dissipation of the stator, rotating shaft and thrust plate. And by setting the filter assembly, it is possible to effectively block particulate matter from entering the interior of the air-cooled magnetic levitation fan, and prevent particulate matter from damaging the internal components of the air-cooled magnetic levitation fan.

[0008] Furthermore, a plurality of second ventilation ducts extending axially are arranged between the outer wall and the inner wall of the casing, the air inlet hole penetrates the outer wall and the inner wall of the casing, and is connected with at least part of the second ventilation duct; the cross-section of the air inlet hole is rectangular, and the four corners of the air inlet hole are provided with arc-shaped inner chamfers.

[0009] Furthermore, the filter assembly is a rectangular filter screen, and the filter screen is fixedly installed on the outer side of the air inlet hole.

[0010] Furthermore, the casing is provided with a positioning hole at the outer edge of the air inlet, the edge of the filter is provided with a U-shaped groove matching the position of the positioning hole, and the positioning piece is inserted into the U-shaped groove and locked with the positioning hole.

[0011] Furthermore, it also includes a first shield and a second shield, the first shield is assembled at one end of the casing close to the impeller, and the second shield is assembled at one end of the casing close to the heat dissipation fan; the heat dissipation shield is assembled with one end of the casing away from the impeller through the second shield; the magnetic suspension assembly includes a first magnetic bearing and a second magnetic bearing, the first magnetic bearing and the second magnetic bearing are respectively installed in the first shield and the second shield; the two ends of the rotating shaft pass through the first magnetic bearing and the second magnetic bearing;

[0012] The first shield and the second shield are respectively provided with a plurality of first ventilation holes and a plurality of second ventilation holes; the first ventilation holes and the second ventilation holes are communicated with the heat dissipation channel.

[0013] Furthermore, the heat dissipation assembly further comprises a heat conducting member, and the stator, the heat conducting member and the housing are sequentially sleeved and installed, with one end of the heat conducting member abutting against the stator, and the other end abutting against the housing.

[0014] Furthermore, the heat conducting member includes an annular base, a plurality of fin portions and a partition portion, wherein the annular base is sleeved on the outer side of the stator; the fin portions are arranged at intervals along the circumference of the annular base, and a heat dissipation groove is formed between two adjacent fin portions, and the heat dissipation groove is connected to the air inlet hole; the partition portion abuts against the inner side of the casing, and the partition portion is arranged at one end of the annular base close to the air outlet to close one end of the heat dissipation groove.

[0015] Furthermore, the number of the air inlet holes is 4, and the air inlet holes are symmetrically arranged along the axial center line of the casing.

[0016] In order to provide a clearer understanding of the present application, the specific implementation of the present application will be described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of an air-cooled magnetic levitation fan for this application;

[0018] Figure 2 A partial cross-sectional view of a casing of an air-cooled magnetic levitation fan of the present application;

[0019] Figure 3 This is a cross-sectional schematic diagram of an air-cooled magnetic levitation fan of the present application;

[0020] Figure 4 This is a partial structural schematic diagram of an air-cooled magnetic levitation fan of the present application;

[0021] Figure 5 This is an exploded schematic diagram of the assembly of a first shield, a first position detection device, a first magnetic bearing, a first thrust bearing, a thrust plate, and a second thrust bearing in an air-cooled magnetic suspension fan of the present application;

[0022] Figure 6 This is an exploded schematic diagram of the assembly of a second shield, a second position detection device and a second magnetic bearing in an air-cooled magnetic suspension fan of the present application;

[0023] Figure 7 This is a schematic structural diagram of a heat-conducting component of an air-cooled magnetic levitation fan of the present application;

[0024] Figure 8 This is an exploded schematic diagram of the assembly of an impeller, a volute, a first shield, a first magnetic ring, a first position detection device, a first magnetic bearing, a first thrust bearing, a thrust plate, and a second thrust bearing in an air-cooled magnetic suspension fan of the present application;

[0025] Fig. 9 This is an exploded schematic diagram of the assembly of a heat dissipation cover, a heat dissipation fan, a second protective cover, a second magnetic ring, a second position detection device and a second magnetic bearing in an air-cooled magnetic levitation fan of the present application. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present application. It is understood that the drawings are only provided for reference and illustration, and are not used to limit the present application. The connection relationship shown in the drawings is only for the convenience of clear description and does not limit the connection method.

[0028] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component, or there may be an intermediate component at the same time. Unless otherwise defined, all technical and scientific terms used in this document have the same meaning as those generally understood by technicians in the technical field to which this application belongs. It should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or the internal communication of two components.

[0029] For those skilled in the art, the specific meanings of the above terms in this application can be understood in specific circumstances. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0030] It should also be noted that in the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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 application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0031] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1 This is a schematic diagram of the structure of an air-cooled magnetic levitation fan in this application. Figure 2This is a partial cross-sectional view of a casing of an air-cooled magnetic levitation fan of the present application. Figure 3 This is a cross-sectional schematic diagram of an air-cooled magnetic levitation fan of the present application. Figure 4 This is a schematic diagram of the partial structure of an air-cooled magnetic levitation fan of the present application.

[0032] The present application provides an air-cooled magnetic suspension fan 1, comprising: a housing 101, a stator 102, a rotating shaft 103, an impeller 104, a magnetic suspension component 106 and a heat dissipation component 107, wherein the housing 101, the stator 102 and the rotating shaft 103 are sequentially sleeved, and both ends of the rotating shaft 103 are rotatably connected to the housing 101 through the magnetic suspension component 106, and the impeller 104 is fixedly mounted on one end of the rotating shaft 103, and a ventilation duct is formed between the stator 102 and the rotating shaft 103;

[0033] The heat dissipation assembly 107 includes: a heat dissipation fan 107a, a heat dissipation cover 107b and a filter assembly 107c. The heat dissipation fan 107a is fixedly mounted on the other end of the rotating shaft 103. The heat dissipation cover 107b is assembled on the end of the housing 101 away from the impeller 104, and the heat dissipation cover 107b is provided with an air outlet 107d. The housing 101 is provided with at least one air inlet 101a connected to the ventilation duct. The number of the air inlet 101a is preferably 4, and the air inlet 101a is symmetrically arranged along the axial center line of the housing 101. The air inlet 101 is arranged at the end of the housing 101 away from the heat dissipation fan 107a. The air inlet 101a, the ventilation duct 102a and the air outlet 107d form a heat dissipation channel, and the filter assembly 107c is arranged in the heat dissipation channel.

[0034] In the air-cooled magnetic levitation fan 1, the rotating shaft 103 is suspended in the stator 102 by magnetic force, and the ventilation duct is formed between the rotating shaft 103 and the stator 102. By providing at least one air inlet 101a connected to the ventilation duct on the housing 101, when the air-cooled magnetic levitation fan 1 is in operation, the heat dissipation fan 107a rotates at a high speed, which makes the air pressure outside the housing 101 at the air inlet 101a greater than the air pressure inside the housing 101, and the wind flows into the air-cooled magnetic levitation fan 1 from the air inlet 101a, and flows in the ventilation duct 102a formed between the stator 102 and the rotating shaft 103, and finally flows out from the air outlet 107d, thereby taking away the heat generated by the stator 102 and the rotating shaft 103 during use, and completing the air cooling and heat dissipation of the stator 102 and the rotating shaft 103. The filter component 107c is installed on the casing 101, so that when the wind enters the air-cooled magnetic levitation fan 1 from the air inlet 101a for air-cooling and heat dissipation, the filter component 107c can effectively block particles from entering the air-cooled magnetic levitation fan 1, thereby preventing particles from damaging the internal components of the air-cooled magnetic levitation fan 1.

[0035] In one embodiment, a plurality of second ventilation passages 101b extending in the axial direction are provided between the outer wall and the inner wall of the housing 101, and the air inlet 101a penetrates the outer wall and the inner wall of the housing 101 and is communicated with at least a portion of the second ventilation passages 101b. The cross section of the air inlet 101a is rectangular, and the four corners of the air inlet 101a are provided with arc-shaped inner chamfers.

[0036] By setting the air inlet 101a, the air intake volume can be effectively increased, thereby improving the air-cooling heat dissipation capacity of the air-cooled magnetic levitation fan 1, and by setting arc-shaped inner chamfers at the four corners of the air inlet 101a, stress concentration can be reduced. When the air-cooled magnetic levitation fan 1 is in operation and a large amount of wind is sucked from the outside into the air-cooled magnetic levitation fan 1 for heat dissipation, the compression and tensile properties of the air inlet 101a are increased, and the stress concentration and fatigue cracks at the toughness angle are reduced, thereby extending the service life of the product. In other embodiments, the number and shape of the air inlet 101a can be adaptively adjusted according to actual heat dissipation requirements.

[0037] In this embodiment, the filter assembly 107c is a rectangular filter screen, and the filter screen 107c is fixedly installed on the outside of the air inlet hole 101a. The housing 101 is provided with a positioning hole 101c on the outer edge of the air inlet hole 101a, and the edge of the filter screen 107c is provided with a U-shaped groove 107e matching the position of the positioning hole 101c, and the U-shaped groove 107e is inserted into the positioning piece such as a screw to lock the filter screen 101c with the positioning hole.

[0038] By providing a detachable filter 101c, particles can be effectively blocked from entering the air-cooled magnetic levitation fan, particles can be prevented from damaging the internal components of the air-cooled magnetic levitation fan, and the staff can easily remove and replace the filter 101c. In other embodiments, the shape of the filter assembly 107c can be adaptively adjusted according to the shape of the air inlet 101a; other positioning members such as bolts can also be used to snap into the U-shaped groove 107e and lock the filter 101c with the positioning hole.

[0039] See also Figure 5 and Figure 6 , Figure 5 This is an exploded schematic diagram of the assembly of a first shield, a first position detection device, a first magnetic bearing, a first thrust bearing, a thrust plate, and a second thrust bearing in an air-cooled magnetic suspension fan of the present application; Figure 6 This is an exploded schematic diagram of the assembly of a second protective cover, a second position detection device and a second magnetic bearing in an air-cooled magnetic levitation fan of the present application.

[0040] In one embodiment, the air-cooled magnetic levitation fan 1 further includes a first shield 108 and a second shield 109, wherein the first shield 108 is assembled at one end of the housing 101 close to the impeller 104, and the second shield 109 is assembled at one end of the housing 101 close to the cooling fan 107a; the cooling shield 107b is assembled with the end of the housing 101 away from the impeller 104 through the second shield 109; the magnetic levitation assembly 106 includes a first magnetic bearing 106a and a second magnetic bearing The first magnetic bearing 106a and the second magnetic bearing 106b are respectively installed in the first shield 108 and the second shield 109; the two ends of the rotating shaft 103 pass through the first magnetic bearing 106a and the second magnetic bearing 106b; the first shield 108 and the second shield 109 are respectively provided with a plurality of first ventilation holes 108d and a plurality of second ventilation holes 109d, wherein the number of the first ventilation holes 108d and the second ventilation holes 109d is 10. The first ventilation holes 108d and the second ventilation holes 109d are communicated with the heat dissipation channel.

[0041] By respectively providing a plurality of first ventilation holes 108d and a plurality of second ventilation holes 109d in the first shield 108 and the second shield 109, and the first ventilation holes 108d, the ventilation passage 102a, the second ventilation holes 109d and the air outlet 107d form the heat dissipation channel, the flow path of the wind in the air-cooled magnetic levitation fan 1 is further expanded, and the flow efficiency of the wind in the air-cooled magnetic levitation fan 1 is effectively improved, thereby improving the air-cooled heat dissipation capacity. Of course, in other embodiments, the number of the first ventilation holes 108d and the second ventilation holes 109d can be adaptively adjusted according to actual heat dissipation requirements.

[0042] See also Figure 7 , Figure 7 The schematic diagram of the structure of a heat-conducting member of an air-cooled magnetic levitation fan of the present application is shown in FIG. In the present embodiment, the heat dissipation assembly 107 further includes a heat-conducting member 107f, and the stator 102, the heat-conducting member 107f and the housing 101 are sequentially installed and sleeved, and one end of the heat-conducting member 107f abuts against the stator 102, and the other end abuts against the housing 101.

[0043] The heat conducting member 107f includes a base portion 107g, a plurality of fin portions 107h and a partition portion 107i, wherein the base portion 107g abuts against the outer side of the stator 102; the fin portions 107h are arranged at intervals along the circumference of the base portion 107g, and a heat dissipation groove is formed between two adjacent fin portions 107h, and the heat dissipation groove is connected to the air inlet 101a; the partition portion 107i abuts against the inner side of the housing 101, and the partition portion 107i closes one end of the heat dissipation groove close to the air outlet 107d. With the base portion 107g abutting against the outer side of the stator 102 and one end of the partition portion 107i abutting against the inner side of the housing 101, part of the heat of the stator 102 can be conducted to the housing 101 through the heat conducting member 107f, thereby completing the heat dissipation of the stator 102. In addition, the air inlet 101a, the first ventilation hole 108d, the heat dissipation groove, the second ventilation hole 109d and the air outlet 107d form a second heat dissipation channel. The air cooling passing through the second heat dissipation channel can fully take away the heat of the heat conductor 107f, further improving the heat dissipation effect of the heat conductor 107f on the stator 102.

[0044] In one embodiment, the magnetic suspension assembly 106 further includes a thrust bearing 106c, which is installed in the first shield 108. The first shield 108 is provided with a first position detection device installation portion 108a, a first magnetic bearing installation portion 108b, and a thrust bearing installation portion 108c in sequence in a direction away from the impeller 104. The second shield 109 is provided with a second position detection device installation portion 109a and a second magnetic bearing installation portion 109b in sequence in a direction away from the cooling fan 107a.

[0045] The first magnetic bearing 106a and the second magnetic bearing 106b are respectively installed in the first magnetic bearing installation portion 108b and the second magnetic bearing installation portion 109b, and the thrust bearing component 106c is installed in the thrust bearing component installation portion 108c. Both ends of the rotating shaft 103 pass through the first magnetic bearing 106a, the second magnetic bearing 106b and the thrust bearing component 106c, and the first magnetic bearing 106a and the thrust bearing component 106c are sequentially arranged adjacent to each other along the axial direction of the rotating shaft.

[0046] The thrust bearing component 106c includes a first thrust bearing 106d, a thrust plate 106e and a second thrust bearing 106f, wherein the thrust plate 106e is installed at one end of the rotating shaft 103 close to the impeller 104, the first thrust bearing 106d and the second thrust bearing 106f are installed in the thrust bearing component installation portion 108c, and the first thrust bearing 106d, the thrust plate 106e and the second thrust bearing 106f are arranged adjacent to each other in the axial direction of the rotating shaft 103, and the second thrust bearing 106f is detachably fixed and assembled with the first thrust bearing 106d by screws. The first magnetic bearing 106a and the second magnetic bearing 106b generate a magnetic field after being energized, so that the rotating shaft 103 and the stator 102 can be non-contactedly suspended.

[0047] In other embodiments, in order to improve the stability of the fixed assembly of the first thrust bearing 106d and the second thrust bearing 106f, the first thrust bearing 106d and the second thrust bearing 106f may also be fixedly assembled by bolts.

[0048] In this example, see Figure 8 and Fig. 9 , Figure 8 This is an exploded schematic diagram of the assembly of an impeller, a volute, a first shield, a first magnetic ring, a first position detection device, a first magnetic bearing, a first thrust bearing, a thrust plate, and a second thrust bearing in an air-cooled magnetic suspension fan of the present application; Fig. 9This is an exploded schematic diagram of the assembly of a heat dissipation cover, a heat dissipation fan, a second protective cover, a second magnetic ring, a second position detection device and a second magnetic bearing in an air-cooled magnetic levitation fan of the present application.

[0049] The air-cooled magnetic levitation fan 1 also includes a first position detection device 110, a second position detection device 111, a first magnetic ring 112 and a second magnetic ring 113. The first position detection device 110 and the second position detection device 111 are respectively installed on the first position detection device installation part 108a and the second position detection device installation part 109a, so as to be installed in the first protective cover 108 and the second protective cover 109; the first position detection device 110 is arranged adjacent to the first magnetic bearing 106a; the second position detection device 111 is arranged adjacent to the second magnetic bearing 106b.

[0050] The first magnetic ring 112 and the second magnetic ring 113 are respectively fixedly mounted on both ends of the rotating shaft 103, and the first magnetic ring 112 and the second magnetic ring 113 are respectively fixedly mounted on both ends of the rotating shaft 103, so that the first magnetic ring 112 and the second magnetic ring 113 can rotate synchronously with the rotating shaft 103. The first position detection device 110 and the second position detection device 111 are respectively arranged around the first magnetic ring 112 and the second magnetic ring 113. In one embodiment, the first magnetic ring 112 and the second magnetic ring 113 are annular magnetic rings.

[0051] In other embodiments, the first position detection device 110 and the first magnetic bearing 106a may not be arranged closely together, but other structures such as a cooling structure may be arranged in the middle; the second position detection device 111 and the second magnetic bearing 106b may not be arranged closely together, but other structures such as a cooling structure may be arranged in the middle.

[0052] In one embodiment, please also refer to Figure 5 and Figure 6 The first position detection device 110 includes a first axial sensor 110a, a first radial sensor 110b, and a second axial sensor 110c, and the second position detection device 111 includes a second radial sensor 111a and a speed sensor 111b. The first axial sensor 110a, the first radial sensor 110b, and the second axial sensor 110c are sequentially disposed adjacent to each other in the first position detection device mounting portion 108a along the axial direction of the rotating shaft 103. The second radial sensor 111a and the speed sensor 111b are disposed adjacent to each other in the second position detection device mounting portion 109a along the axial direction of the rotating shaft 103.

[0053] The first axial sensor 110a and the second axial sensor 110c each include at least one axial sensor element and an axial sensor mounting ring whose inner diameter is greater than the diameter of the first magnetic ring 112. The number of the axial sensor elements is preferably 4. The inner ring of the axial sensor mounting ring protrudes toward the center to form at least one axial sensor element mounting boss. The number of the axial sensor element mounting bosses is correspondingly set to 4. The axial sensor element mounting bosses are symmetrically arranged with respect to the center of the axial sensor mounting ring. The axial sensor element is matched and mounted on the axial sensor element mounting bosses. Of course, according to actual needs, the number of the axial sensor elements can be adaptively adjusted, and the number of the axial sensor element mounting bosses can be adjusted accordingly.

[0054] The first radial sensor 110b and the second radial sensor 111a each include at least one radial sensor element and a radial sensor mounting ring whose inner diameter is greater than the diameter of the second magnetic ring 113, and the number of the radial sensor elements is preferably 4; the inner ring of the radial sensor mounting ring protrudes toward the center to form at least one radial sensor element mounting boss, and the number of the radial sensor element mounting bosses is correspondingly set to 4; the radial sensor element mounting bosses are symmetrically arranged with respect to the center of the radial sensor mounting ring; the radial sensor element is matched and mounted on the radial sensor element mounting bosses. Of course, according to actual needs, the number of the radial sensor elements can be adaptively adjusted, and the number of the radial sensor element mounting bosses can be adjusted accordingly.

[0055] The second radial sensor 110b can surround the second magnetic ring 113, so that the second radial sensor 111a is arranged circumferentially along the second magnetic ring 113, and the speed sensor 111b is spaced apart from the second radial sensor 111a; the first axial sensor 110a, the first radial sensor 110b and the second axial sensor 110c can surround the first magnetic ring 112, so that the first axial sensor 110a, the first radial sensor 110b and the second axial sensor 110c are sequentially spaced apart from each other along the circumference of the first magnetic ring 112.

[0056] The speed sensor 111b and the second radial sensor 111a are sequentially arranged at intervals along the circumference of the second magnetic ring 113 to respectively detect the rotation speed and radial displacement of the second magnetic ring 113, thereby detecting the rotation speed and radial displacement of the rotating shaft 103. The first axial sensor 110a, the first radial sensor 110b, and the second axial sensor 110c are sequentially arranged at intervals along the circumference of the first magnetic ring 112 to detect the axial displacement and radial displacement of the rotating shaft 103.

[0057] The first magnetic ring 112 at least includes a first magnet 112a, a second magnet 112b and a third magnet 112c, the second magnetic ring 113 at least includes a first magnetic part 113a and a second magnetic part 113b, the first magnet 112a, the second magnet 112b and the third magnet 112c are adjacently arranged along the axial direction of the rotating shaft 103; the first magnetic part 113a and the second magnetic part 113b are adjacently arranged along the axial direction of the rotating shaft 103, and the second magnetic part 113b is provided with a notch.

[0058] The first axial sensor 110a is arranged circumferentially along the connection between the first magnet 112a and the second magnet 112b, and the second axial sensor 110c is arranged circumferentially along the connection between the second magnet 112b and the third magnet 112c. When the rotating shaft 103 undergoes axial displacement, the first magnet 112a, the second magnet 112b and the third magnet 112c will also undergo axial displacement synchronously, and the first axial sensor 110a and the second axial sensor 110c will detect the magnetic field changes when the first magnet 112a, the second magnet 112b and the third magnet 112c undergo axial displacement, thereby realizing the detection of the axial displacement of the rotating shaft 103. The present application effectively improves the detection accuracy of the axial displacement of the rotating shaft 103 by arranging the first axial sensor 110a and the second axial sensor 110c to detect the axial displacement of the rotating shaft 103 at the same time. In other embodiments, the number of the axial sensors can be adaptively modified according to the actual detection accuracy requirements.

[0059] The first radial sensor 110b is arranged circumferentially along the second magnet 112b. When the rotating shaft 103 undergoes radial displacement, the second magnet 112b will also undergo radial displacement synchronously. The first radial sensor 110b will detect the change in the magnetic field when the second magnet 112b undergoes radial displacement, thereby realizing the detection of the radial displacement of the rotating shaft 103.

[0060] By arranging the second radial sensor 111a along the circumference of the first magnetic part 113a, when the rotating shaft 103 undergoes radial displacement, the first magnetic part 113a will also undergo radial displacement synchronously, and the second radial sensor 111a will detect the magnetic field change when the first magnetic part 113a undergoes radial displacement, thereby realizing the detection of the radial displacement of the rotating shaft 103. By arranging the speed sensor 111b corresponding to the second magnetic part 113b, the speed sensor 111b can detect the rotation frequency of the notch of the second magnetic part 113b to detect the rotation speed of the second magnetic part 113b, thereby obtaining the rotation speed of the rotating shaft 103.

[0061] The present application provides a first radial sensor 110b and a second radial sensor 111a to simultaneously detect the radial displacement of the rotating shaft 103, thereby effectively improving the detection accuracy of the radial displacement of the rotating shaft 103. In other embodiments, the number of the radial sensors can be adaptively modified according to actual detection accuracy requirements.

[0062] In this embodiment, the air-cooled magnetic levitation fan 1 further includes a volute 114 , which is closely attached to an end of the first shield 108 away from the casing 101 and is detachably assembled with the first shield 108 , and the impeller 104 is disposed in the volute 114 .

[0063] In one embodiment, the air-cooled magnetic levitation fan further includes two first safety bearings 115 and two second safety bearings 116, the second shield 109 and the first shield 108 are respectively provided with a first safety bearing mounting portion (not marked in the figure) and a second safety bearing mounting portion (not marked in the figure), and the first safety bearing 115 and the second safety bearing 116 are respectively installed in the first safety bearing mounting portion and the second safety bearing mounting portion. The two ends of the rotating shaft 103 pass through the first safety bearing 115 and the second safety bearing 116 respectively, and the first safety bearing 115 is arranged between the first impeller 104 and the first position detection device 110, and the second safety bearing 116 is arranged between the cooling fan 107a and the second position detection device 111.

[0064] The present application is not limited to the above-mentioned implementation modes. If various changes or modifications to the present application do not depart from the spirit and scope of the present application, and if these changes and modifications fall within the claims of the present application and the scope of equivalent technologies, the present application is also intended to include these changes and modifications.

Claims

1. An air-cooled magnetic suspension fan, characterized in that: include: A casing, a stator, a rotating shaft, an impeller, a magnetic suspension component and a heat dissipation component, wherein the casing, the stator and the rotating shaft are sleeved in sequence, the two ends of the rotating shaft are rotatably connected to the casing through the magnetic suspension component, the impeller is fixedly mounted on one end of the rotating shaft, and a ventilation passage is formed between the stator and the rotating shaft; The heat dissipation assembly includes: a heat dissipation fan, a heat dissipation cover and a filter assembly, the heat dissipation fan is fixedly mounted on the other end of the rotating shaft, the heat dissipation cover is assembled at the end of the casing away from the impeller, and the heat dissipation cover is provided with an air outlet; the casing is provided with at least one air inlet hole connected to the ventilation duct, and the air inlet hole is arranged at the end of the casing away from the heat dissipation fan; the air inlet hole, the ventilation duct and the air outlet are connected to form a heat dissipation channel, and the filter assembly is arranged in the heat dissipation channel.

2. The air-cooled magnetic levitation fan according to claim 1, characterized in that: A plurality of second ventilation passages extending in the axial direction are arranged between the outer wall and the inner wall of the casing, and the air inlet holes penetrate the outer wall and the inner wall of the casing and are communicated with at least a part of the second ventilation passages.

3. The air-cooled magnetic levitation fan according to claim 1, characterized in that: The cross section of the air inlet hole is rectangular, and the four corners of the air inlet hole are all provided with arc-shaped inner chamfers.

4. The air-cooled magnetic levitation fan according to claim 1, characterized in that: The filter assembly is a rectangular filter screen, and the filter screen is fixedly installed on the outer side of the air inlet hole.

5. The air-cooled magnetic levitation fan according to claim 4, characterized in that: The casing is provided with a positioning hole at the outer edge of the air inlet hole, the edge of the filter is provided with a U-shaped groove matching the position of the positioning hole, and the positioning piece is inserted into the U-shaped groove and locked with the positioning hole.

6. The air-cooled magnetic levitation fan according to claim 1, characterized in that: It also includes a first shield and a second shield, the first shield is assembled at one end of the casing close to the impeller, and the second shield is assembled at one end of the casing close to the heat dissipation fan; the heat dissipation shield is assembled with one end of the casing away from the impeller through the second shield; the magnetic suspension assembly includes a first magnetic bearing and a second magnetic bearing, the first magnetic bearing and the second magnetic bearing are respectively installed in the first shield and the second shield, and both ends of the rotating shaft pass through the first magnetic bearing and the second magnetic bearing; The first shield and the second shield are respectively provided with a plurality of first ventilation holes and a plurality of second ventilation holes; the first ventilation holes and the second ventilation holes are communicated with the heat dissipation channel.

7. The air-cooled magnetic levitation fan according to claim 1, characterized in that: The heat dissipation assembly also includes a heat conducting member. The stator, the heat conducting member and the housing are sequentially sleeved and installed. One end of the heat conducting member abuts against the stator, and the other end abuts against the housing.

8. The air-cooled magnetic levitation fan according to claim 7, characterized in that: The heat-conducting component includes an annular base, a plurality of fin portions and a partition portion, wherein the annular base is sleeved on the outer side of the stator; the fin portions are arranged at intervals along the circumference of the annular base, and a heat dissipation groove is formed between two adjacent fin portions, and the heat dissipation groove is connected to the air inlet hole; the partition portion abuts against the inner side of the casing, and the partition portion is arranged at one end of the annular base close to the air outlet to close one end of the heat dissipation groove.

9. The air-cooled magnetic levitation fan according to claim 1, characterized in that: The number of the air inlet holes is 4, and the air inlet holes are symmetrically arranged along the axial center line of the housing.

10. The air-cooled magnetic levitation fan according to claim 6, characterized in that: The magnetic suspension assembly also includes a thrust bearing component, which is installed in the first shield. Both ends of the rotating shaft pass through the thrust bearing component, and the first magnetic suspension bearing and the thrust bearing component are arranged adjacent to each other in sequence along the axial direction of the rotating shaft.

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