Magnetic suspension driving mechanism, fan and electrical equipment

Abstract

The invention relates to a magnetic suspension driving mechanism, a fan and electrical equipment, the magnetic suspension driving mechanism comprises a shell, a magnetic conductive rotor, an excitation assembly and a driving assembly, and an annular groove is formed in the inner wall of the shell; the periphery of the magnetic conductive rotor is provided with a limiting part which is arranged in a protruding manner. The axis of the magnetic conductive rotor is perpendicular to the limiting part. At least part of the limiting part extends into the annular groove, and the limiting part is arranged in the middle of the magnetic conductive rotor in the axial direction of the magnetic conductive rotor; the width of the annular groove is greater than that of the limiting part; the excitation assembly is arranged in the shell and is used for enabling the magnetic conductive rotor to suspend; the driving assembly is arranged on the shell and used for enabling the magnetic conductive rotor to rotate. According to the magnetic suspension driving mechanism, stress is balanced when the magnetic conductive rotor normally suspends and rotates, the annular groove does not make contact with the limiting part, if the magnetic conductive rotor drastically moves or swings, the annular groove plays a role in limiting the limiting part, the magnetic conductive rotor is prevented from moving or swinging, and the operation stability of the magnetic suspension driving mechanism can be guaranteed.

Description

Technical Field

[0001] This application relates to the field of magnetic levitation technology, and particularly to a magnetic levitation drive mechanism, a fan, and an electrical appliance device. Background Art

[0002] Compared with traditional motors, magnetic levitation motors use magnetic force to suspend the rotor, eliminating the frictional losses of traditional mechanical bearings during rotor rotation, which can improve the energy conversion efficiency and thus reduce the overall energy consumption of the device. In addition, since there is no physical contact between the rotor and the stator of the magnetic levitation motor during rotation, there is no mechanical wear problem, which greatly extends the service life of the motor and reduces the maintenance and replacement costs caused by wear.

[0003] However, since the rotor is in a suspended state during rotation, when the rotor rotates at high speed, it is prone to large-scale crosstalk and swinging problems, and the operation stability of the magnetic levitation motor cannot be guaranteed. Summary of the Invention

[0004] This application provides a magnetic levitation drive mechanism, a fan, and an electrical appliance device to solve the technical problem that when the rotor is in a suspended state in the prior art, it is prone to large-scale crosstalk and swinging.

[0005] In a first aspect, this application provides a magnetic levitation drive mechanism, including: A housing, on the inner wall of which a ring-shaped groove is provided; A magnetic conductive rotor, on the outer periphery of which a protruding limiting portion is provided, and the axis of the magnetic conductive rotor is perpendicular to the limiting portion; at least part of the limiting portion extends into the ring-shaped groove, and in the axial direction of the magnetic conductive rotor, the limiting portion is arranged in the middle of the magnetic conductive rotor, and the width of the ring-shaped groove is greater than the width of the limiting portion; An exciting component, which is arranged inside the housing and is used to suspend the magnetic conductive rotor inside the housing; A driving component, which is arranged on the housing and is used to generate a rotating magnetic field to make the magnetic conductive rotor rotate.

[0006] Optionally, a plurality of rollers are arranged inside the ring-shaped groove, the rollers are located between the inner wall of the ring-shaped groove and the outer surface of the limiting portion, and there is a preset gap between the rollers and the limiting portion.

[0007] Optionally, the limiting portion is a ring-shaped limiting hub arranged on the outer periphery of the magnetic conductive rotor; Or, the limiting portion includes a plurality of limiting blocks, and the plurality of limiting blocks are arranged in a ring on the outer periphery of the magnetic conductive rotor.

[0008] Optionally, the exciting component includes a plurality of exciting modules, and the plurality of exciting modules are evenly distributed along the circumferential direction of the housing; In the circumferential direction of the housing, the polarities of two adjacent excitation modules are opposite, and the polarities of two opposite excitation modules are the same.

[0009] Optionally, the driving assembly includes a plurality of stator assemblies. In the axial direction of the housing, the plurality of stator assemblies are symmetrically distributed on both sides of the annular groove. In the circumferential direction of the housing, the plurality of stator assemblies are evenly distributed along the outer periphery of the magnetic rotor.

[0010] Optionally, the magnetic levitation driving mechanism further includes an adjusting assembly. The adjusting assembly is arranged at the end of the housing and is used to adjust the axial position of the magnetic rotor.

[0011] Optionally, the adjusting assembly includes a plurality of energized coil assemblies. The plurality of energized coil assemblies are symmetrically arranged at both ends of the housing and are used to apply magnetic force to both ends of the magnetic rotor.

[0012] Optionally, the adjusting assembly further includes a detecting member. The detecting member is arranged at the end of the housing and is oriented towards the end of the magnetic rotor. The detecting member is signal-connected to the energized coil assembly.

[0013] In a second aspect, the present application provides a fan, including the magnetic levitation driving mechanism provided in the first aspect of the present application. The magnetic rotor is a wind wheel, and the magnetic rotor includes a plurality of blades extending along the axial direction of the magnetic rotor. The plurality of blades are all connected to the limiting portion.

[0014] Optionally, the housing is a volute. An air inlet is provided at the end of the housing, and an air outlet is provided on the outer peripheral surface of the housing.

[0015] Optionally, air inlets are provided at both ends of the housing, and two air outlets symmetrically arranged with respect to the annular groove are provided on the outer peripheral surface of the housing.

[0016] In a third aspect, the present application provides an electrical device, including the fan provided in the second aspect of the present application.

[0017] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art: The magnetic levitation drive mechanism provided by the embodiment of the present application can levitate the magnetic rotor inside the housing through the excitation component, and rotate the magnetic rotor by generating a rotating magnetic field through the drive component. When the magnetic rotor is in a normal levitation and rotation state, since the width of the annular groove is greater than the width of the limiting portion, there will be no contact between the annular groove and the limiting portion; if the magnetic rotor experiences large-scale displacement or swing due to reasons such as high-speed rotation, the annular groove can cooperate with the limiting portion on the outer periphery of the magnetic rotor, and the inner wall of the annular groove can exert a limiting effect on the limiting portion, which can prevent the magnetic rotor from moving axially and can limit the swing of the magnetic rotor relative to the rotation axis. The limiting portion is arranged in the middle of the magnetic rotor axially, which can make the gravity distribution of the magnetic rotor uniform. When the limiting portion is subjected to the limiting effect of the annular groove, the force on the magnetic rotor can be balanced, thereby ensuring the stability of the magnetic rotor during levitation and rotation, and further ensuring the operating stability of the magnetic levitation drive mechanism.

[0018] The fan and electrical equipment provided by the embodiment of the present application include the above magnetic levitation drive mechanism, and can reduce the energy consumption and vibration during the operation of the fan and electrical equipment through the magnetic levitation drive mechanism. Therefore, it naturally has the technical effects possessed by the above magnetic levitation drive mechanism. Description of the Drawings

[0019] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments in line with the present application, and are used together with the specification to explain the principles of the present application.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the drawings in the figures do not constitute a proportional limitation.

[0022] Figure 1 It is a side view of the fan provided by the embodiment of the present application; Figure 2 It is a front view of the fan provided by the embodiment of the present application; Figure 3 It is provided by the embodiment of the present application along Figure 1 Partial cross-sectional view along A-A (the magnetic rotor is not sectioned); Figure 4 It is provided by the embodiment of the present application Figure 3Partial detailed enlarged view; Figure 5 Schematic diagram of the partial structure of the magnetic levitation drive mechanism provided by the embodiment of the present application; Figure 6 For the embodiment of the present application along Figure 3 Cross-sectional view taken along B-B in; Figure 7 For the embodiment of the present application along Figure 3 Cross-sectional view taken along C-C in; Figure 8 Schematic diagram of the structure of the magnetic conductive rotor provided by the embodiment of the present application; Figure 9 Front view of the magnetic conductive rotor provided by the embodiment of the present application; Figure 10 For the embodiment of the present application along Figure 9 Cross-sectional view taken along D-D in; Figure 11 Side view of the magnetic conductive rotor provided by the embodiment of the present application.

[0023] Explanation of reference numerals: 1. Housing; 11. Annular groove; 12. Roller; 13. Air inlet; 14. Air outlet; 15. Limiting plate; 2. Magnetic conductive rotor; 21. Limiting part; 22. Blade; 23. Ring; 24. Detection and cooperation part; 25. Magnetic force cooperation part; 26. Disk; 3. Excitation assembly; 31. First excitation module; 32. Second excitation module; 33. Third excitation module; 34. Fourth excitation module; 4. Drive assembly; 41. First stator assembly; 42. Second stator assembly; 43. Third stator assembly; 44. Fourth stator assembly; 45. Fifth stator assembly; 5. Adjustment assembly; 51. First energized coil assembly; 52. Second energized coil assembly; 53. First detection piece; 54. Second detection piece. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0025] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0026] For ease of description, spatially relative terms may be used in the text to describe the relative positional relationship or movement of one element or feature shown in the figure relative to another element or feature. These relative relationship terms are, for example, "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "over", "front", "rear", etc. Such spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or attitude change or change in motion state, then these directional indications will change accordingly. For example, an element described as "below" or "beneath" other elements or features will then be oriented as "above" or "over" other elements or features. Thus, the exemplary term "below" can include both the upper and lower orientations. The device may be oriented otherwise (rotated 90 degrees or in other directions) and the spatially relative descriptors used in the text are interpreted accordingly.

[0027] To solve the technical problem that the rotor is prone to large-scale crosstalk and wobbling when in a suspended state in the prior art, the present application provides a magnetic levitation drive mechanism, a fan, and an electrical device. The magnetic levitation drive mechanism is provided with an annular groove 11 inside the housing 1, and a limiting portion 21 is protrudingly provided on the outer periphery of the magnetic conductive rotor 2. When the magnetic conductive rotor 2 is suspended and rotates normally, there is no contact between the annular groove 11 and the limiting portion 21. If the magnetic conductive rotor 2 undergoes large-scale crosstalk or wobbling, the annular groove 11 can play a limiting role on the limiting portion 21, thereby preventing the magnetic conductive rotor 2 from undergoing large-scale crosstalk or wobbling during rotation, and further ensuring the operation stability of the magnetic levitation drive mechanism.

[0028] Please refer to Figures 1 to 11, in the first aspect of the embodiment of the present application, a magnetic levitation drive mechanism is provided, which includes a housing 1, a magnetic rotor 2, an excitation assembly 3, and a drive assembly 4. An annular groove 11 is provided on the inner wall of the housing 1; a protruding limiting portion 21 is provided on the outer periphery of the magnetic rotor 2, and the axis of the magnetic rotor 2 is perpendicular to the limiting portion 21; at least a part of the limiting portion 21 extends into the annular groove 11. In the axial direction of the magnetic rotor 2, the width of the annular groove 11 is greater than the width of the limiting portion 21. When the magnetic rotor 2 is in a suspended state, a preset gap exists between the inner wall of the annular groove 11 and the outer surface of the limiting portion 21, where the axial preset gap is denoted as the first preset gap L1, and the radial (i.e., the direction perpendicular to the axial direction) preset gap is denoted as the second preset gap L2. As Figure 3 and Figure 4 shown, when the magnetic rotor 2 is suspended and rotating normally, there will be no contact between the annular groove 11 and the limiting portion 21; if the magnetic rotor 2 undergoes large-scale crosstalk or swing due to reasons such as high-speed rotation, the annular groove 11 can cooperate with the limiting portion 21 to generate a limiting effect on the limiting portion 21 through the inner wall of the annular groove 11, which can prevent the magnetic rotor 2 from crosstalking in the axial direction (i.e., Figure 3 the left-right direction in Figure 3 ), and can limit the magnetic rotor 2 from swinging in the up-down direction relative to the rotation axis in

[0029] , thereby ensuring the stability of the magnetic rotor 2 during the suspended rotation process, and further ensuring the operating stability of the magnetic levitation drive mechanism. Figure 3 and Figure 6 shown, so as to avoid contact between the magnetic rotor 2 and the components inside the housing 1, and further avoid friction between the magnetic rotor 2 and other components during rotation, which can reduce the resistance suffered by the magnetic rotor 2 during rotation and reduce the noise generated by the magnetic rotor 2 during rotation.

[0030] The drive assembly 4 is arranged on the housing 1 and is used to generate a rotating magnetic field that causes the magnetic rotor 2 to rotate. Under the action of the rotating magnetic field, a rotating torque can be applied to the magnetic rotor 2, so that the magnetic rotor 2 rotates inside the housing 1.

[0031] It should be noted that one or more groups of mutually cooperating limiting portions 21 and annular grooves 11 can be provided in the axial direction of the magnetic rotor 2. As long as it can prevent the magnetic rotor 2 from undergoing large-scale crosstalk or swing during the suspended rotation process, the purpose of the present application can be achieved.

[0032] In some preferred embodiments of the present application, please refer to Figure 3, axially on the magnetic rotor 2, the limiting part 21 is arranged in the middle of the magnetic rotor 2, which can make the gravity distribution of the magnetic rotor 2 itself uniform and prevent the magnetic rotor 2 from yawing due to uneven gravity distribution. When the limiting part 21 is limited by the annular groove 11, the force on the magnetic rotor 2 can be balanced. In this layout, only a set of cooperating limiting part 21 and annular groove 11 can prevent the magnetic rotor 2 from making large-scale crosstalk or swinging during the suspension rotation process, which is beneficial to simplifying the internal structure of the magnetic levitation drive mechanism.

[0033] It should be noted that the magnetic rotor 2 is entirely made of a magnetic material (such as iron-nickel alloy, soft magnetic alloy, pure electrical iron, and silicon steel). When the magnetic rotor 2 is placed in a rotating magnetic field, the magnetic domains inside the magnetic rotor 2 will rearrange to respond to the changes in the external rotating magnetic field.

[0034] In this application, by setting the limiting part 21 (which also has magnetic properties) on the outer periphery of the magnetic rotor 2 and arranging the annular groove 11 inside the housing 1, when the magnetic rotor 2 rotates in suspension, the limiting part 21 also rotates inside the annular groove 11, and there is no contact between the limiting part 21 and the annular groove 11. When the magnetic rotor 2 makes large-scale crosstalk and moves towards Figure 3 the left or right side, the inner walls on both sides of the annular groove 11 can play a role in sliding limit for the limiting part 21; when the magnetic rotor 2 makes large-scale swinging, the inner walls on both sides of the annular groove 11 can play a role in swinging limit for the limiting part 21. It can reduce the friction between the magnetic rotor 2 and other components due to crosstalk or swinging, effectively reduce the vibration and noise levels of the magnetic levitation drive mechanism, make the magnetic levitation drive mechanism operate more smoothly, and is suitable for occasions with high requirements for environmental noise, such as indoor electrical equipment, precision instruments, and medical equipment.

[0035] In some embodiments of this application, please refer to Figure 4 and Figure 5 , two annular limiting plates 15 are oppositely arranged inside the housing 1, the annular groove 11 is formed between the two limiting plates 15, and the distance between the two limiting plates 15 can be designed according to the size of the limiting part 21 on the magnetic rotor 2 to ensure that there is enough air gap between the limiting part 21 and the limiting plate 15.

[0036] When the magnetic levitation drive mechanism is in a shutdown state, the limiting part 21 can be supported and limited by the limiting plate 15 and the annular groove 11 to fix the magnetic rotor 2 inside the housing 1 and prevent the magnetic rotor 2 from axially slipping inside the housing 1.

[0037] In some embodiments of this application, please refer to Figure 4, a plurality of rollers 12 are provided inside the annular groove 11. The rollers 12 are located between the inner wall of the annular groove 11 and the outer surface of the limiting portion 21, and there is a preset gap between the rollers 12 and the limiting portion 21, denoted as the third preset gap L3. It can be understood that the sum of the third preset gap L3 and the diameter of the roller 12 is the first preset gap L1. When the magnetic rotor 2 is suspended and rotates normally, there is no contact between the limiting portion 21 and the roller 12; when the magnetic rotor 2 undergoes a large amount of axial movement or swing, the limiting portion 21 contacts the roller 12, and the friction resistance applied to the rotating limiting portion 21 can be reduced through the roller 12.

[0038] In some embodiments of the present application, the plurality of rollers 12 are movably arranged in a rolling element cage (not shown in the figure), ensuring that the rollers 12 can roll while enabling the plurality of rollers 12 to be evenly distributed along the circumference of the annular groove 11, preventing the plurality of rollers 12 from contacting or aggregating during operation.

[0039] In some embodiments of the present application, please refer to Figure 8 , the limiting portion 21 is an annular limiting hub provided on the outer circumference of the magnetic rotor 2, which can cooperate with the annular groove 11 to form a continuous limiting effect in the circumferential direction of the magnetic rotor 2, ensuring the stability of the magnetic rotor 2 during rotation.

[0040] In some other embodiments of the present application, the limiting portion 21 includes a plurality of limiting blocks. The plurality of limiting blocks are annularly arranged on the outer circumference of the magnetic rotor 2, and the plurality of limiting blocks all extend into the annular groove 11, which can also form a uniform limiting effect in the circumferential direction of the magnetic rotor 2 to ensure the stability of the magnetic rotor 2 during rotation.

[0041] It should be noted that, in order to ensure the continuity of the limiting effect, it is preferably to set the limiting portion 21 as an annular limiting hub on the outer circumference of the magnetic rotor 2, as Figure 8 shown.

[0042] In the above embodiments, the excitation assembly 3 can be a permanent magnet type excitation assembly, that is, the magnetic rotor 2 reaches the suspended state through the cooperation of a plurality of permanent magnets, or an electromagnetic type excitation assembly, that is, the magnetic rotor 2 reaches the suspended state through the cooperation of a plurality of excitation cores and excitation coils, both of which can achieve the purpose of the present application.

[0043] In some embodiments of the present application, please refer to Figure 3 and Figure 4 , the excitation assembly 3 includes a plurality of excitation modules. Each excitation module includes an excitation core and an excitation coil wound around the excitation core. After the excitation coil is energized, it can generate a magnetic field to magnetize the excitation core. When the current direction inside the excitation coil changes, the polarity of the excitation core can be switched.

[0044] A plurality of excitation modules are evenly distributed along the circumferential direction of the housing 1, so that a plurality of magnetic excitation cores are evenly distributed along the circumferential direction of the magnetic rotor 2, thereby applying a uniform magnetic force to the magnetic rotor 2 and enabling the magnetic rotor 2 to reach a suspended state.

[0045] In the circumferential direction of the housing 1, the polarities of two adjacent excitation modules are opposite, and the polarities of two opposite excitation modules are the same. Layouts such as two-pole pairs and four-pole pairs can be formed, enabling the magnetic rotor 2 to reach a state where the axis of the magnetic rotor 2 coincides with the axis of the housing 1 in any radial direction, and keeping the magnetic rotor 2 in a radially centered position.

[0046] In some embodiments of the present application, please refer to Figure 3 and Figure 4 , the excitation assembly 3 includes a plurality of excitation modules symmetrically arranged at both ends of the housing 1. The distribution modes of the excitation modules at both ends of the housing 1 are the same. Taking the distribution mode of the excitation modules at the left end as an example, the following description is given. Figure 3 For example, the distribution mode of the excitation modules at the left end is described as follows.

[0047] As can be seen from Figure 4 , four excitation modules are provided at one end of the housing 1, which are respectively denoted as the first excitation module 31, the second excitation module 32, the third excitation module 33, and the fourth excitation module 34. The four excitation modules are evenly distributed along the circumferential direction of the housing 1. Among them, the first excitation module 31 and the second excitation module 32 are oppositely arranged and have the same polarity. The third excitation module 33 and the fourth excitation module 34 are oppositely arranged and have the same polarity. The first excitation module 31 is adjacent to the third excitation module 33 and the fourth excitation module 34 respectively and has opposite polarities. When the polarities of the excitation cores in the first excitation module 31 and the second excitation module 32 are N poles, the polarities of the excitation cores in the third excitation module 33 and the fourth excitation module 34 are S poles, enabling the magnetic rotor 2 to be in a suspended state under the combined action of the four excitation modules. Vice versa.

[0048] In some embodiments of the present application, please refer to Figure 6 , Figure 8 and Figure 9 , annular rings 23 are provided at both ends of the magnetic rotor 2, which can be used to cooperate with a plurality of excitation modules at both ends of the housing 1. When the excitation coils are energized, the excitation cores are magnetized, generating a magnetic force on the annular rings 23, thereby enabling the magnetic rotor 2 to reach a suspended state.

[0049] It should be noted that the annular rings 23 at both ends of the magnetic rotor 2 can replace the cast aluminum end rings of traditional squirrel-cage motors during operation. The annular rings 23 are subjected to the magnetic force of the excitation cores, thereby applying a suspension force to the magnetic rotor 2 through the excitation assembly 3.

[0050] In some embodiments of the present application, please refer to Figure 3 , Figure 4 , Figure 5and Figure 7 The drive assembly 4 includes a plurality of stator assemblies, each of which includes a stator core and a stator winding. The rotating magnetic field is usually generated by three-phase or multi-phase alternating current through the stator winding. In the axial direction of the housing 1, the plurality of stator assemblies are symmetrically distributed on both sides of the annular groove 11, and a uniform rotating magnetic field can be formed on both sides (i.e., both sides in the axial direction) of the limiting portion 21 of the magnetic rotor 2. In the circumferential direction of the housing 1, the plurality of stator assemblies are evenly distributed along the outer circumference of the magnetic rotor 2, and a uniform rotating magnetic field can be formed in the circumferential direction of the magnetic rotor 2.

[0051] It should be noted that the uniform rotating magnetic field can balance the force on the magnetic rotor 2, avoiding local overload that may cause wear of the roller 12 inside the annular groove 11 or deformation of the magnetic rotor 2; and the uniform rotating magnetic field can accurately control the suspension and rotation position of the magnetic rotor 2, which is conducive to meeting the stringent requirements of high-speed rotating machinery.

[0052] As a specific embodiment of this application, please refer to Figure 4 , Figure 5 and Figure 7 The driving assembly 4 includes eight stator assemblies symmetrically arranged on both sides of the annular groove 11. Figure 3 The multiple stator components on the left side of the middle annular groove 11 are taken as an example for explanation.

[0053] The four stator assemblies are arranged on the side of the limiting plate 15 facing away from the annular groove 11, so that the stator assemblies are located outside the annular groove 11, and while generating a rotating magnetic field for the magnetic rotor 2, interference with the rotation of the limiting portion 21 is avoided. The four stator assemblies are respectively recorded as a first stator assembly 41, a second stator assembly 42, a third stator assembly 43 and a fourth stator assembly 44, and the stator winding of each stator assembly is connected to the power system, and three-phase or multi-phase alternating current can be input into the stator winding through the power system to generate a rotating magnetic field.

[0054] In the axial direction of the shell 1, the first stator assembly 41 and the fifth stator assembly 45 are symmetrically arranged on both sides of the annular groove 11, and can generate a balanced rotating magnetic field on both axial sides of the limit portion 21, so that the first preset gap L1 can be maintained between both sides of the limit portion 21 and the inner wall of the annular groove 11.

[0055] In some embodiments of this application, please refer to Figure 3 and Figure 6 The magnetic levitation drive mechanism also includes an adjustment component 5, which is arranged at the end of the shell 1 and is used to adjust the axial position of the magnetic rotor 2 to avoid serious position deviation of the magnetic rotor 2 inside the shell 1.

[0056] It should be noted that the adjusting assembly 5 preferably adjusts the axial position of the magnetizable rotor 2 in a non-contact manner (such as magnetic force, etc.). When the adjusting assembly 5 is only arranged at one end of the housing 1, the distance between the magnetizable rotor 2 and the adjusting assembly 5 can be increased by magnetic repulsion, and the distance between the magnetizable rotor 2 and the adjusting assembly 5 can be reduced by magnetic attraction, so that the axial position of the magnetizable rotor 2 reaches a preset state (such as being centered, etc.). When the adjusting assembly 5 is arranged at both ends of the housing 1, the adjusting assemblies 5 at both ends apply magnetic forces (which can be magnetic repulsion or magnetic attraction) to the magnetizable rotor 2, and adjust the distances between the magnetizable rotor 2 and the two ends of the housing 1, so that the axial position of the magnetizable rotor 2 reaches a preset state.

[0057] In some embodiments of the present application, please refer to Figure 3 , the adjusting assembly 5 includes a plurality of energized coil assemblies. Each energized coil assembly includes an adjusting iron core and an energized coil wound around the adjusting iron core. By inputting current into the energized coil, the adjusting iron core can generate magnetism. By adjusting the current direction, the polarity of the adjusting iron core can be set to the N pole or the S pole. By adjusting the current magnitude, the magnetic force of the adjusting iron core can be adjusted. The plurality of energized coil assemblies are symmetrically arranged at both ends of the housing 1 and are used to apply magnetic forces to both ends of the magnetizable rotor 2, so that the magnetizable rotor 2 realizes the adjustment of the axial position under the combined action of the plurality of energized coil assemblies at both ends of it, and avoids serious position deviation of the magnetizable rotor 2.

[0058] It should be noted that when the magnetizable rotor 2 of the magnetic levitation drive mechanism needs to be provided with an output shaft to drive other components to rotate, more than two energized coil assemblies are provided at each end of the housing 1, and the energized coil assemblies are uniformly arranged along the outer circumference of the output shaft to avoid interference with the output shaft. When the magnetizable rotor 2 does not need to be provided with an output shaft to connect with other components, the energized coil assembly can be coaxially arranged with the magnetizable rotor 2. At this time, only one energized coil assembly needs to be provided at each end of the housing 1, as Figure 3 shown.

[0059] In some embodiments of the present application, please refer to Figure 3 , Figure 6 and Figure 8 , magnetic force matching parts 25 are provided at both ends of the magnetizable rotor 2 and can be oppositely arranged with the first energized coil assembly 51 and the second energized coil assembly 52 at both ends of the housing 1 respectively, so that the magnetic forces generated by the first energized coil assembly 51 and the second energized coil assembly 52 act directly on the magnetic force matching parts 25, thereby generating an axial thrust or pull on the magnetizable rotor 2.

[0060] In some preferred embodiments of the present application, both the first energized coil assembly 51 and the second energized coil assembly 52 generate magnetic repulsion forces on the magnetizable rotor 2, which can avoid the contact between the magnetizable rotor 2 and the ends of the housing 1 under the action of magnetic attraction.

[0061] In some embodiments of the present application, please refer to Figure 3 , Figure 6 and Figure 8 , the adjusting assembly 5 further includes a detecting member disposed at an end of the housing 1 and facing the end of the magnetically permeable rotor 2, and can be used to detect the relative position in the axial direction between the magnetically permeable rotor 2 and the inner wall of the housing 1. The detecting member is signal-connected to the energized coil assembly, and the current parameters passed through the energized coil assembly can be adjusted according to the axial position information detected by the detecting member, so as to realize the feedback adjustment of the axial position of the magnetically permeable rotor 2.

[0062] In some embodiments of the present application, please refer to Figure 3 , Figure 6 and Figure 8 , the number of the detecting members is multiple, and the multiple detecting members are symmetrically disposed at both ends of the housing 1, and can respectively monitor the distances between both ends of the magnetically permeable rotor 2 and both ends of the housing 1. The multiple detecting members are signal-connected to the multiple energized coil assemblies, and the magnetic force of the energized coil assemblies at both ends of the housing 1 can be adjusted according to the position information on both sides.

[0063] In some embodiments of the present application, the detecting member is a distance sensor, and the magnitude of the current passing through the energized coil is inversely proportional to the detection value of the distance sensor. For Figure 3 example, the following description is given.

[0064] When the first detecting member 53 and the second detecting member 54 detect that the left end of the magnetically permeable rotor 2 is closer to the left end of the housing 1, while the right end of the magnetically permeable rotor 2 is farther from the right end of the housing 1, the current amount of the energized coil one in the first energized coil assembly 51 increases, so that the magnetic repulsive force generated by the first energized coil assembly 51 on the magnetically permeable rotor 2 increases, thereby pushing the magnetically permeable rotor 2 towards the Figure 3 right side until the magnetically permeable rotor 2 is centered.

[0065] When the first detecting member 53 and the second detecting member 54 detect that the left end of the magnetically permeable rotor 2 is farther from the left end of the housing 1, while the right end of the magnetically permeable rotor 2 is closer to the right end of the housing 1, the current amount of the energized coil two in the second energized coil assembly 52 increases, so that the magnetic repulsive force generated by the second energized coil assembly 52 on the magnetically permeable rotor 2 increases, thereby pushing the magnetically permeable rotor 2 towards the Figure 3 left side until the magnetically permeable rotor 2 is centered.

[0066] In some embodiments of the present application, please refer to Figure 6 , Figure 8 and Figure 11, detection and cooperation parts 24 are provided at both ends of the magnetic rotor 2 so as to cooperate with the detection piece to realize distance detection. The detection and cooperation parts 24 at both ends of the magnetic rotor 2 are respectively connected to the wheel rings 23 at both ends of the magnetic rotor 2 to form a whole.

[0067] When the detection piece is eccentrically arranged (that is, the detection end deviates from the axis of the magnetic rotor 2) at the end of the housing 1, the detection and cooperation part 24 includes a plurality of plate bodies, such as Figure 6 and Figure 8 shown, the average value is obtained by detecting the distance values of a plurality of plate bodies, so as to obtain the axial position information of the magnetic rotor 2.

[0068] In some embodiments of the present application, please refer to Figure 11 , the detection and cooperation part 24 further includes an annular plate body, and the detection piece is arranged opposite to the annular plate body, which can ensure the continuity of position detection and improve the detection accuracy.

[0069] In some embodiments of the present application, please refer to Figure 3 、 Figure 8 and Figure 9 , the magnetic rotor 2 is of a symmetrical structure. When the magnetic rotor 2 rotates inside the housing 1, the mass distribution of the magnetic rotor 2 is uniform, which can avoid periodic vibration caused by unbalanced centrifugal force. And the symmetrical structure makes the magnetic circuit distribution on the magnetic rotor 2 uniform, which can reduce the magnetic resistance fluctuation and the situation of electromagnetic force imbalance.

[0070] Please refer to Figures 1 to 11 , the second aspect of the embodiments of the present application provides a blower, including the magnetic levitation drive mechanism described in the above embodiments. The magnetic rotor 2 is a wind wheel, and the magnetic rotor 2 includes a plurality of blades 22. The wind wheel can be directly rotationally driven by the drive assembly 4, so that the blades 22 drive the air flow to flow inside the housing 1. Driving the wind wheel to rotate through the magnetic levitation drive mechanism can greatly reduce the energy consumption and noise generated during the operation of the blower.

[0071] Specifically, the plurality of blades 22 are all arranged to extend along the axial direction of the magnetic rotor 2, and the plurality of blades 22 are all connected to the limiting part 21. The limiting part 21 can connect the plurality of blades 22 into a whole, so as to improve the stiffness of the blades 22 and avoid the problem of insufficient strength of the long strip-shaped blades 22, such as Figure 8 shown.

[0072] In some embodiments of the present application, please refer to Figure 8 and Figure 9 , both ends of the plurality of blades 22 are connected to the wheel rings 23 at both ends of the magnetic rotor 2, and the middle parts of the plurality of blades 22 are connected to the limiting part 21. The stiffness of the long strip-shaped blades 22 can be improved by the wheel rings 23 and the limiting part 21 together, so as to improve the overall structural strength of the wind wheel.

[0073] In some embodiments of the present application, please refer to FIG. 9 and Figure 10 , the magnetic rotor 2 (i.e., the wind wheel) further includes a wheel disc 26, which is disposed in the central region of the plurality of blades 22 and is connected to the limiting portion 21 and the plurality of blades 22, and can be used to form the main structure of the wind wheel.

[0074] In some embodiments of the present application, the limiting portion 21, the plurality of blades 22, the annular ring 23, the detection and cooperation portion 24, the magnetic force cooperation portion 25, and the wheel disc 26 can be integrally formed by casting or the like to form an iron wind wheel, which can simplify the manufacturing process of the magnetic rotor 2 and improve the connection reliability of the components in the magnetic rotor 2.

[0075] In some embodiments of the present application, please refer to Figure 1 , Figure 2 , Figure 6 and Figure 7 , the housing 1 is a volute, and an air inlet 13 is provided at the end of the housing 1 for introducing air flow from the end of the housing 1. An air outlet 14 is provided on the outer peripheral surface of the housing 1, so that the air flow can be output circumferentially from the housing 1 under the drive of the plurality of blades 22.

[0076] In some embodiments of the present application, please refer to Figure 8 and Figure 11 , in order to enable the air flow entering from the end of the housing 1 to enter the interior of the wind wheel axially, a hollow structure is provided on the detection and cooperation portion 24 of the housing 1, and the air flow can enter the interior of the wind wheel through the hollow structure at the end of the magnetic rotor 2. Thus, when the magnetic rotor 2 (i.e., the wind wheel) rotates, the air flow is driven by the blades 22 and flows along Figure 6 and Figure 7 the dashed arrows in.

[0077] It should be noted that in the present application, the volute (i.e., the housing 1) is used to achieve end air intake and circumferential air outlet, which can guide the air flow to enter uniformly along the axis of the magnetic rotor 2 from the end of the housing 1. Then, the air flow is evenly distributed circumferentially in the volute through the blades 22. Finally, the air outlet 14 is used to expand the air supply range of the fan, so that the air outlet covers the target area more evenly.

[0078] In some embodiments of the present application, please refer to Figure 1 and Figure 2 , air inlets 13 are provided at both ends of the housing 1, and two air outlets 14 symmetrically arranged with respect to the annular groove 11 are provided on the outer peripheral surface of the housing 1, which can achieve symmetric air intake and symmetric air outlet at both ends of the fan. On the one hand, the axial forces of the incoming air flow acting on the wind wheel can be offset from each other to prevent the wind wheel from axially moving; on the other hand, the air intake volume and the air outlet volume can be increased, and the air intake effect and the air outlet effect of the fan can be improved.

[0079] Please refer to Figures 1 to 11, in the third aspect of the embodiments of the present application, an electrical device is provided, including the fan described in the above embodiments, which can significantly reduce the energy consumption and noise during the air treatment process of the electrical device, and at the same time ensure the stability of the operation of the electrical device.

[0080] In some embodiments of the present application, the electrical device can be an air conditioner, an air purifier, a medical device, etc. The magnetic levitation drive mechanism drives the wind wheel to rotate, which can reduce the mechanical friction and power consumption inside the electrical device, reduce the noise and vibration generated during the operation of the electrical device, and thus extend the reliability and service life of the electrical device.

[0081] In some embodiments of the present application, please refer to Figures 1 to 11 , the working process of the above magnetic levitation drive mechanism is as follows: Step 1: Start the excitation component 3 and the adjustment component 5 to make the magnetic rotor 2 levitate and make the axial and radial positions of the magnetic rotor 2 centered inside the housing 1; Step 2: Start the drive component 4 to generate a rotating magnetic field inside the housing 1, and the magnetic rotor 2 starts to rotate. During the rotation process, the large-scale displacement and swing of the magnetic rotor 2 are avoided through the cooperation of the annular groove 11 and the limiting part 21; Step 3: If the detection component in the adjustment component 5 detects that the axial position of the magnetic rotor 2 is seriously deviated, adjust the axial position of the magnetic rotor 2 through the energized coil component in the adjustment component 5 until the magnetic rotor 2 returns to the centered state.

[0082] It should be understood that the terms used in this document are only for the purpose of describing specific example embodiments and are not intended to be restrictive. Unless otherwise clearly indicated in the context, the singular forms "a", "an", and "the" as used in this document may also represent the plural form. The terms "include", "comprise", "contain", and "have" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or their combinations. The method steps, processes, and operations described in this document are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that alternative or additional steps may be used.

[0083] Although terms such as first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another region, layer, or section. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms do not imply an order or sequence when used in this document. Therefore, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the exemplary embodiments.

[0084] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather will conform to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A magnetic levitation drive mechanism, characterized in that, Comprising: A housing (1), on the inner wall of which there is an annular groove (11); A magnetically conductive rotor (2), on the outer periphery of which there is a protruding limiting part (21), the axis of the magnetically conductive rotor (2) being perpendicular to the limiting part (21); at least part of the limiting part (21) extends into the annular groove (11), in the axial direction of the magnetically conductive rotor (2), the limiting part (21) is arranged in the middle of the magnetically conductive rotor (2), and the width of the annular groove (11) is greater than the width of the limiting part (21); An exciting component (3), which is arranged inside the housing (1) and is used to suspend the magnetically conductive rotor (2) inside the housing (1); A driving component (4), which is arranged on the housing (1) and is used to generate a rotating magnetic field to make the magnetically conductive rotor (2) rotate.

2. The magnetic levitation drive mechanism according to claim 1, wherein Inside the annular groove (11) there are a plurality of rollers (12), the rollers (12) being located between the inner wall of the annular groove (11) and the outer surface of the limiting part (21), and there being a preset gap between the rollers (12) and the limiting part (21).

3. The magnetic levitation drive mechanism according to claim 1, wherein The limiting part (21) is an annular limiting hub arranged on the outer periphery of the magnetically conductive rotor (2); Or, the limiting part (21) includes a plurality of limiting blocks, and the plurality of limiting blocks are annularly arranged on the outer periphery of the magnetically conductive rotor (2).

4. The magnetic levitation drive mechanism according to claim 1, characterized in that, The exciting component (3) includes a plurality of exciting modules, and the plurality of exciting modules are evenly distributed along the circumferential direction of the housing (1); In the circumferential direction of the housing (1), the polarities of two adjacent exciting modules are opposite, and the polarities of two opposite exciting modules are the same.

5. The magnetic levitation drive mechanism according to claim 1, wherein The driving component (4) includes a plurality of stator components, and in the axial direction of the housing (1), the plurality of stator components are symmetrically distributed on both sides of the annular groove (11); In the circumferential direction of the housing (1), the plurality of stator components are evenly distributed along the outer periphery of the magnetically conductive rotor (2).

6. The magnetic levitation drive mechanism according to any one of claims 1 to 5, characterized in that, It further includes an adjusting component (5), which is arranged at the end of the housing (1) and is used to adjust the axial position of the magnetically conductive rotor (2).

7. The magnetic levitation drive mechanism according to claim 6, wherein, The adjusting component (5) includes a plurality of energized coil components, and the plurality of energized coil components are symmetrically arranged at both ends of the housing (1) and are used to apply magnetic force to both ends of the magnetically conductive rotor (2).

8. The magnetic levitation drive mechanism according to claim 7, wherein The adjusting component (5) further includes a detecting member, which is arranged at the end of the housing (1) and is arranged towards the end of the magnetically conductive rotor (2), and the detecting member is signal-connected to the energized coil component.

9. A blower, characterized in that, Comprising the magnetic levitation driving mechanism according to any one of claims 1 to 8, wherein the magnetically conductive rotor (2) is a wind wheel, and the magnetically conductive rotor (2) includes a plurality of blades (22) extending along the axial direction of the magnetically conductive rotor (2), and the plurality of blades (22) are all connected to the limiting part (21).

10. The fan according to claim 9, characterized in that, The housing (1) is a volute, and an air inlet (13) is provided at the end of the housing (1), and an air outlet (14) is provided on the outer peripheral surface of the housing (1).

11. The blower according to claim 10, characterized in that, Both ends of the housing (1) are provided with the air inlets (13), and two air outlets (14) symmetrically arranged with respect to the annular groove (11) are provided on the outer peripheral surface of the housing (1).

12. An electrical device, characterized in that, Comprising a blower according to any one of claims 9 to 11.

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