CN110855028A - Magnetic suspension fan device - Google Patents
Magnetic suspension fan device Download PDFInfo
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- CN110855028A CN110855028A CN201911280486.8A CN201911280486A CN110855028A CN 110855028 A CN110855028 A CN 110855028A CN 201911280486 A CN201911280486 A CN 201911280486A CN 110855028 A CN110855028 A CN 110855028A
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- 239000000725 suspension Substances 0.000 title claims abstract description 13
- 238000005339 levitation Methods 0.000 claims description 18
- 230000005484 gravity Effects 0.000 claims description 16
- 239000000306 component Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/662—Balancing of rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a magnetic suspension fan device, comprising: a rotor structure; fan blades connected with the rotor structure; a support connected to the rotor structure; and a stator structure detachably connected to the support, the support being supported on the stator structure when the magnetically levitated fan assembly is stationary; when the magnetic suspension fan device works, the supporting piece is supported on the stator structure or the supporting piece is separated from the stator structure, when the magnetic suspension fan device works, the fan blades rotate, and the supporting piece can be separated from the stator structure by the reaction force of air on the fan blades; when the supporting piece is supported on the stator structure, the fan blade has a first rotating speed, and when the supporting piece is separated from the stator structure, the fan blade has a second rotating speed, wherein the first rotating speed is less than the second rotating speed. Has the advantage of low running noise.
Description
Technical Field
The invention relates to the technical field of fans, in particular to a magnetic suspension fan device.
Background
Fans are used as the most common ventilation equipment, and are often used for indoor and outdoor ventilation, high-temperature heat dissipation, power devices and the like. Such as an electric fan for home use, a range hood for kitchen use, a ventilation device for underground garages and large malls, a radiator fan for use inside a computer, a radiator fan for use in a cooling system of an automobile transmitter, a rotor of a rotary wing type unmanned aerial vehicle, a rotor of a helicopter, and the like.
The core component of the fan mainly comprises fan blades and a motor. The motor is mainly divided into a stator and a rotor, and the rotor is usually connected with the fan blades; the bearing is used as a part of the universal motor, is connected with the stator and the rotor, and is a guarantee for smooth operation of the motor.
The bearing is an important part for mechanical connection between the fan blade and the motor in the fan; however, when the current fan runs for a long time, the mechanical system consisting of the fan blades, the bearings and the stator generates large noise due to the friction of the bearings.
Disclosure of Invention
In view of the above, it is desirable to provide a magnetic levitation fan apparatus with low noise.
A magnetically levitated fan apparatus comprising:
a rotor structure;
fan blades connected with the rotor structure;
a support connected to the rotor structure; and
a stator structure detachably connected to the support, the support being supported on the stator structure when the magnetically levitated fan assembly is stationary; when the magnetic suspension fan device works, the supporting piece is supported on the stator structure or the supporting piece is separated from the stator structure, when the magnetic suspension fan device works, the fan blades rotate, and the supporting piece can be separated from the stator structure by the reaction force of air on the fan blades; when the supporting piece is supported on the stator structure, the fan blade has a first rotating speed, and when the supporting piece is separated from the stator structure, the fan blade has a second rotating speed, wherein the first rotating speed is less than the second rotating speed.
In one embodiment, the method further comprises the following steps:
a rotating shaft connected to the rotor structure; and
and the limiting structure is provided with a guide hole, and the rotating shaft is connected with the guide hole in a sliding manner.
In one embodiment, a second coil is arranged on the limiting structure, a second magnetic part is arranged on the rotating shaft, and the second coil can generate magnetic field force after being electrified, wherein the magnetic field force is at least used for balancing the reaction force of air on the fan blades.
In one embodiment, the number of the second coils is at least three, the second coils are uniformly arranged on the periphery of the guide hole, and the rotating shaft is kept separated from the inner wall of the guide hole by adjusting the magnetic field force generated by each second coil and the second magnetic piece.
In one embodiment, the device further comprises a position sensor for sensing the relative position of the rotating shaft and the guide hole, the position sensor obtains a relative position signal representing the relative position of the rotating shaft and the guide hole, and the magnitude of the magnetic field force of each second coil and each second magnetic element is adjusted through the relative position signal so as to keep the rotating shaft separated from the inner wall of the guide hole.
In one embodiment, the second magnetic member, the rotating shaft, the support member, the rotor structure and the fan blade are connected to form a whole, and the center of gravity of the whole is located on the support member.
In one embodiment, the fan blade is provided with an annular balancing weight concentrically arranged with the rotating shaft.
In one embodiment, the fan further comprises a weight disposed on at least one of the rotor structure, the rotating shaft, the support member, and the fan blades.
In one embodiment, the stator structure is provided with a groove, and the support member is provided with a tip capable of supporting the groove.
In one embodiment, the rotor further comprises a bearing, and the support is supported on the rotor structure through the bearing.
Has the advantages that: when the magnetic suspension fan device rotates at a low speed, the supporting piece can be supported on the stator structure, at the moment, the supporting piece and the stator structure generate relative motion to generate friction, and at the moment, certain noise can be generated. Along with the increase of the rotating speed of the fan blades, the supporting piece is separated from the stator structure, so that friction is not generated between the supporting piece and the stator structure, the noise is reduced, and the magnetic suspension fan device still keeps a quiet state when running at a high speed. Meanwhile, the supporting piece is separated from the stator structure, so that friction loss does not exist between the supporting piece and the stator structure, energy loss caused by friction is reduced, and energy is saved.
Drawings
FIG. 1 is a schematic diagram of a magnetically levitated fan assembly in one embodiment of the present application;
FIG. 2 is a perspective view of the magnetically levitated fan assembly of FIG. 1;
FIG. 3 is a schematic view of the magnetic levitation fan apparatus of FIG. 1 in an operating state;
FIG. 4 is a cross-sectional schematic view of a portion of a second coil and a second magnetic member included in the magnetically levitated fan assembly of FIG. 1;
fig. 5 is a schematic cross-sectional view of the stator structure and rotor structure of the magnetic levitation fan apparatus of fig. 1.
Reference numerals: 100. a rotor structure; 200. a fan blade; 210. a balancing weight; 300. a rotating shaft; 310. a support member; 320. a tip; 400. a stator structure; 510. a first magnetic member; 520. a second magnetic member; 600. a limiting structure; 600a, a guide hole; 610. a second coil; 700. a groove; 710. a first coil; 720. and a bearing.
Detailed Description
To facilitate an understanding of the invention, the invention is described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
FIG. 1 is a schematic diagram of a magnetic levitation fan apparatus according to an embodiment of the present application; fig. 2 is a perspective view of the magnetic levitation fan apparatus of fig. 1.
As shown in fig. 1 and 2, the magnetic levitation fan apparatus includes a rotor structure 100 and a plurality of fan blades 200 connected to the rotor structure 100, for example, four fan blades 200 are disposed in fig. 2, and the four fan blades 200 are uniformly distributed on the outer periphery of the rotor structure 100. Rotor structure 100 is connected with axis of rotation 300, the axial of axis of rotation 300 can extend along vertical direction, axis of rotation 300 upwards extends and inserts in limit structure 600, as shown in fig. 1, limit structure 600 has guiding hole 600a, guiding hole 600a can be the cylinder hole, the axial in cylinder hole can extend along vertical direction, axis of rotation 300 inserts in guiding hole 600a and can wind the axial rotation of self in guiding hole 600a, limit structure 600 is used for spacing and direction rotation axis 300, it is spacing so that axis of rotation 300 slides along the axial of axis of rotation 300 to rotate axis of rotation 300 through limit structure 600. Specifically, guiding means that the rotary shaft 300 slides in the guide hole 600a in the axial direction of the rotary shaft 300, and limiting means that the movement of the rotary shaft 300 in the circumferential direction thereof is limited to some extent by the guide hole 600a, the accuracy of the limitation depending on the accuracy of fitting of the guide hole 600a to the rotary shaft 300.
As shown in fig. 1, the rotor structure 100 is further connected with a supporting member 310, and the supporting member 310 is detachably connected with the stator structure 400, for example, the supporting member 310 may abut against the surface of the stator structure 400, as shown in fig. 3, the supporting member 310 may be separated from the stator structure 400 when the rotating shaft 300 slides upward along the axial direction of the rotating shaft 300 with respect to the guide hole 600a of the stopper structure 600, as shown in fig. 1, and the supporting member 310 may be supported on the stator structure 400 when the rotating shaft 300 slides downward along the axial direction of the rotating shaft 300 with respect to the guide hole 600a of the stopper structure 600. In one embodiment, the support member 310 is coaxially disposed with the rotation shaft 300, and in some embodiments, the central axis of the support member 310 may have an offset from the central axis of the rotation shaft 300 within the tolerance range.
As shown in fig. 1, when the magnetically levitated fan is stationary, the support 310 is supported on a stator structure 400. When the magnetically levitated fan is started, the support 310 is gradually separated from the stator structure 400 as the rotation speed of the fan blades 200 is continuously increased. That is, when the maglev fan operates, the support 310 may be supported on the stator structure 400, and the support 310 may also be separated from the stator structure 400; specifically, when the support 310 is supported on the stator structure 400, the fan blade 200 has a first rotational speed, and when the support 310 is separated from the stator structure 400, the fan blade 200 has a second rotational speed, the first rotational speed being less than the second rotational speed.
When the magnetic levitation fan apparatus rotates at a low speed, the support member 310 may be supported on the stator structure 400, and at this time, the support member 310 and the stator structure 400 generate a relative motion to generate friction, which may generate a certain noise, but the generated noise is relatively small because the rotation speed of the fan blade 200 is low. As the rotation speed of the fan blade 200 increases, the supporting member 310 is separated from the stator structure 400, so that friction is no longer generated between the supporting member 310 and the stator structure 400, noise is reduced, and the magnetic levitation fan apparatus is still in a quiet state when operating at a high speed. Meanwhile, since the support member 310 is separated from the stator structure 400, there is no friction loss between the support member 310 and the stator structure 400, which reduces energy loss caused by friction and saves energy.
In one embodiment, since the supporting member 310 can be separated from the stator structure 400, the rotating shaft 300 is slidably inserted into the guide hole 600a of the stopper structure 600 in order to ensure the reliability of the movement. In one embodiment, the axial direction of the rotating shaft 300 and the axial direction of the guide hole 600a may both extend in a vertical direction, and in some embodiments, the axial direction of the rotating shaft 300 and the axial direction of the guide hole 600a may be at an angle to the vertical direction. It should be understood that since the rotary shaft 300 is capable of rotating relative to the guide hole 600a, when the guide hole 600a is fitted with the rotary shaft 300 with high accuracy, the axial direction of the rotary shaft 300 coincides with the axial direction of the guide hole 600a, and when the guide hole 600a is fitted with the rotary shaft 300 with medium and low accuracy, the axial direction of the rotary shaft 300 and the axial direction of the guide hole 600a are offset from each other, that is, the axial direction of the rotary shaft 300 and the axial direction of the guide hole 600a are parallel or intersect.
For example, in fig. 1, the axial direction of the rotating shaft 300 is in the vertical direction, or the rotating shaft 300 is substantially in the vertical direction, so that the rotor structure 100 and the fan blades 200 can be supported on the stator structure 400 under the action of gravity. When the magnetic levitation fan is started, the fan blade 200 blows downward, or the fan blade 200 blows substantially downward, the air generates an upward reaction force on the fan blade 200, and as the rotation speed of the fan blade 200 increases, when the upward reaction force generated on the fan blade 200 by the air is equal to the gravity of the fan blade 200 and the rotor structure 100, the support member 310 and the stator structure 400 are in a critical state of separation and non-separation, and if the rotation speed of the fan blade 200 continues to increase, the upward reaction force generated on the fan blade 200 by the air increases, so that the support member 310 and the stator structure 400 are separated.
In one embodiment, as shown in fig. 2, a weight 210 is disposed around the fan blade 200, and the weight 210 is an annular sleeve disposed concentrically with the rotating shaft 300. The weight 210 in this embodiment not only can suspend the fan blade 200 stably, but also can increase the angular momentum of the fan blade 200 or the rotor structure 100. In particular, according to the formula of angular momentum,
L＝r×p＝r×(mv)＝mr2ω＝Iω，
l denotes angular momentum, r denotes the distance of the mass point from the center of rotation (axis) (scalar value is understood to be the size of the radius), a vector whose direction points from the origin to the position of the object (i.e., the sagittal diameter), P denotes momentum, v denotes linear velocity, ω denotes angular velocity (vector), and I denotes the inertia tensor. The larger the radius r, the larger the angular momentum L, and therefore, disposing the weight 210 on the outer periphery of the fan blade 200 can increase the angular momentum L of the rotation of the fan blade 200 or the rotor structure 100. The larger the angular momentum L, the stronger the axial fixity of the rotating shaft 300, i.e. the more stable the central axis of the rotating shaft 300 is when the fan blade 200 rotates, and the more easily and precisely the distance between the rotor structure 100 and the stator structure 400 is controlled after the fan blade 200 is suspended.
In other embodiments, the weight 210 may be disposed on the rotor structure 100, and/or on the rotating shaft 300, and/or on the support 310, and/or on the fan blade 200.
In the above embodiment, the support member 310 can be supported on the stator structure 400 by means of the rotor structure 100 and the fan blades 200 under gravity. In some embodiments, an auxiliary elastic member may be further disposed to balance the reaction force of air on fan blade 200 instead of the gravity of rotor structure 100 and fan blade 200, and the arrangement of fan blade 200 may be more flexible, for example, fan blade 200 may blow air in a lateral direction or an upward direction. For example, the auxiliary elastic member may be a spring, and the auxiliary elastic member may be elastically supported between the position limiting structure 600 and the rotor structure 100.
As shown in fig. 1 and 3, the stator structure 400 is provided with a groove 700, and the support member 310 is provided with a tip 320, wherein the tip 320 can be supported in the groove 700 to achieve a positioning effect. In one embodiment, the groove 700 is disposed on the central axis of the stator structure 400. In one embodiment, a bearing 720 is disposed within the groove 700, and the tip 320 is supported within the groove 700 by the bearing 720. In other embodiments, if the stator structure 400 is not provided with the groove 700, the bearing 720 can be directly connected to the outer surface of the stator structure 400, and the tip 320 indirectly contacts the stator structure 400 through the bearing 720. When fan blade 200 rotates at a low speed, bearing 720 generates less noise due to friction, and when fan blade 200 rotates at a high speed, tip 320 can be separated from bearing 720, so that bearing 720 does not generate noise due to high-speed rotation.
In one embodiment, as shown in fig. 1, the stator structure 400 is provided with a first coil 710, the rotor structure 100 is provided with a first magnetic member 510, and the first magnetic member 510 may be a permanent magnet, and when the first coil 710 is powered on, the rotor structure 100 can rotate relative to the stator structure 400 through the cooperation of the first coil 710 and the first magnetic member 510. In one embodiment, the rotor structure 100 is a cavity structure with a downward opening, the stator structure 400 can extend into the cavity structure from the opening, and the first coil 710 is disposed at the end of the stator structure 400 extending into the cavity. The inner wall of the cavity is provided with a first magnetic member 510, and the support member 310 is provided in the middle of the cavity. Since the supporting member 310 can be separated from the stator structure 400, even after the separation, the first magnetic member 510 and the first coil 710 can interact to keep the fan blade 200 stably rotating.
As shown in fig. 5, fig. 5 is a schematic cross-sectional view of the stator structure 400 and the rotor structure 100 of fig. 1 at the junction. There may be two or more first magnetic members 510, and in the embodiment shown in fig. 5, there are two first magnetic members 510, and the two first magnetic members 510 are symmetrically disposed on the inner wall of the rotor structure 100. There may be several first coils 710, and in the embodiment shown in fig. 5, eight first coils 710 are provided, and the eight first coils 710 are uniformly arranged in sequence around the ring. Due to process tolerances and due to differences in the magnetic field strength generated by the plurality of first coils 710. Referring to fig. 1 and 2, when the support member 310 is separated from the stator structure 400 such that the fan blade 200 is suspended, the central axis of the support member 310 may be offset from the central axis of the stator structure 400. When the balancing weight 210 is disposed on the outer periphery of the fan blade 200, the balancing weight 210 is an annular sleeve, and the annular sleeve is disposed concentrically with the rotating shaft 300, the angular momentum L of the fan blade 200 or the rotor structure 100 is larger, so that the central axis of the supporting member 310 and the central axis of the stator structure 400 are slowly deviated. For example, a position sensor may be disposed to sense the position of the rotating shaft 300 in the guiding hole 600a, and then sense the offset degree of the central axis of the supporting member 310, and then correspondingly adjust the magnitude of the current passing through each first coil 710, so as to change the magnetic force between each first coil 710 and the first magnetic member 510, and further make the central axis of the supporting member 310 coincide or substantially coincide with the central axis of the stator structure 400.
In one embodiment, as shown in fig. 1, the limiting structure 600 is provided with a second coil 610, and the rotating shaft 300 is connected with a second magnetic member 520, where the second magnetic member 520 may be a permanent magnet. The second coil 610 and the second magnetic member 520 may be arranged along the axial direction of the rotation shaft 300. When the second coil 610 is energized, a magnetic field force can be generated between the second coil 610 and the second magnetic member 520, and when the fan blade 200 is suspended to separate the support member 310 from the stator structure 400, the magnetic field force generated between the second coil 610 and the second magnetic member 520 is at least used for cooperating with the gravity of the rotor structure 100 and the gravity of the fan blade 200 to balance the reaction force of air on the fan blade 200. When the rotation speed of fan blade 200 is increased, the reaction force generated by air on fan blade 200 is increased, and the magnetic field force generated between second coil 610 and second magnetic element 520 can be increased by increasing the current of second coil 610, thereby balancing the reaction force generated by air on fan blade 200.
In one embodiment, the second coil 610 may be one, the second coil 610 may have a ring shape, and a central axis of the ring-shaped second coil 610 and a central axis of the guide hole 600a may be coaxially disposed, that is, when the second coil 610 is one, a winding direction of the second coil 610 is along an outer circumferential direction of the guide hole 600 a. At this time, the magnetic force generated by the second coil 610 and the second magnetic element 520 is along the central axis of the second coil 610.
In other embodiments, as shown in fig. 4, fig. 4 is a schematic cross-sectional view of a portion of the second coil 610 and the second magnetic member 520 included in the magnetic levitation fan apparatus of fig. 1, as shown in fig. 1 and 4, at least three second coils 610 are provided, and the second coils 610 are circumferentially arranged at the outer periphery of the guide hole 600a, in which case, the central axis of each second coil 610 is disposed outside the guide hole 600 a. Further, a plurality of second coils 610 are uniformly arranged at the outer circumference of the guide hole 600 a. As shown in fig. 1, a magnetic force F between one of the second coils 610 and the second magnetic member 520 may be decomposed into Fz and Fxy, the z-axis is parallel to the central axis of the guiding hole 600a, and the x-axis and the y-axis are perpendicular to the z-axis. Fz is used to cooperate with the gravity of rotor structure 100 and fan blade 200 to balance the reaction force of air on fan blade 200. Since the number of the second coils 610 is at least three, and the plurality of second coils 610 are arranged on the outer circumference of the guide hole 600a in the circumferential direction, the forces of the second coils 610 in the xy plane can be balanced and offset, and particularly, the balanced and offset can be achieved by adjusting the magnitude of the current passing through each second coil 610. For example, a position sensor may be provided to sense the position of the rotating shaft 300 in the guide hole 600a, and then the rotating shaft 300 may be positioned in the middle of the guide hole 600a by adjusting the magnitude of the current in the plurality of second coils 610, and the rotating shaft 300 may not contact the inner wall of the guide hole 600 a. For example, a position sensor may be disposed on the position limiting structure 600, the position sensor obtains a relative position signal indicating a relative position of the rotating shaft 300 and the guide hole 600a, and adjusts a current magnitude of each of the second coils 610 by the relative position signal to adjust component forces of the plurality of second coils 610 and the second magnetic member 520 in the xy plane, respectively, so that the rotating shaft 300 does not contact with the inner wall of the guide hole 600 a. In the embodiment shown in fig. 4, the number of the second coils 610 is four, and four second coils 610 are uniformly arranged on the outer circumference of the guide hole 600 a.
In one embodiment, as shown in fig. 1, when the supporting member 310 is supported on the stator structure 400, the position where the supporting member 310 contacts with the stator structure 400 is a pivot point of the rotation of the whole rotating shaft 300, and the second magnetic member 520, the rotating shaft 300, the supporting member 310, the rotor structure 100 and the fan blade 200 are connected into a whole, the position of the center of gravity of the whole has a certain influence on the difficulty of adjusting the inclination degree of the rotating shaft 300, for example, when the position of the center of gravity of the whole is far away from the pivot point, the force component of the second magnetic member 520 and the second coil 610 in the xy plane needs to be larger to counteract the influence of the gravity force component when the rotating shaft 300 is inclined, so that a larger current needs to be passed through the second coil 610, and the sensitivity of adjustment is reduced due to the influence.
To this end, in one embodiment, as shown in fig. 1, the second magnetic member 520, the rotating shaft 300, the supporting member 310, the rotor structure 100 and the fan blade 200 are integrally connected, and the weight of the second magnetic member 520, the rotating shaft 300, the supporting member 310, the rotor structure 100 and the fan blade 200 is configured such that the center of gravity of the whole is located on the supporting member 310, and when the supporting member 310 is supported on the stator structure 400, the position where the supporting member 310 contacts the stator structure 400 is the fulcrum of the rotation of the whole rotating shaft 300, and since the center of gravity of the whole is located on the supporting member 310, the center of gravity is closer to the fulcrum, and therefore, the influence of the gravity of the whole on the inclination adjustment of the rotating shaft 300 is reduced. The adjustment of the tilt of the rotating shaft 300 can be achieved sensitively by only passing a smaller current through the second coil 610.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A magnetically levitated fan apparatus, comprising:
a rotor structure (100);
a fan blade (200) connected to the rotor structure (100);
a support (310) connecting the rotor structure (100); and
a stator structure (400) detachably connected to the support (310), the support (310) being supported on the stator structure (400) when the magnetically levitated fan assembly is stationary; when the magnetic suspension fan device works, the support (310) is supported on the stator structure (400) or the support (310) is separated from the stator structure (400), when the magnetic suspension fan device works, the fan blade (200) rotates, and the support (310) can be separated from the stator structure (400) by the reaction force of air on the fan blade (200); the fan blade (200) has a first rotational speed when the support (310) is supported on the stator structure (400), and the fan blade (200) has a second rotational speed when the support (310) is separated from the stator structure (400), the first rotational speed being less than the second rotational speed.
2. The magnetic levitation fan apparatus of claim 1, further comprising:
a rotating shaft (300) connected to the rotor structure (100); and
and the limiting structure (600) is provided with a guide hole (600a), and the rotating shaft (300) is connected with the guide hole (600a) in a sliding mode.
3. The magnetic suspension fan device according to claim 2, wherein a second coil (610) is disposed on the position limiting structure (600), a second magnetic member (520) is disposed on the rotating shaft (300), and the second coil (610) is capable of generating a magnetic field force after being energized, wherein the magnetic field force is at least used for balancing a reaction force generated by air on the fan blade (200).
4. The magnetic levitation fan apparatus as claimed in claim 3, wherein the number of the second coils (610) is at least three, a plurality of the second coils (610) are uniformly arranged at the outer circumference of the guide hole (600a), and each of the second coils (610) and the second magnetic member (520) is capable of generating a magnetic field force to keep the rotating shaft (300) separated from the inner wall of the guide hole (600 a).
5. The magnetic levitation fan apparatus as recited in claim 3, further comprising a position sensor for sensing a relative position of the rotating shaft (300) and the guide hole (600a), wherein the position sensor obtains a relative position signal indicative of the relative position of the rotating shaft (300) and the guide hole (600a), and the magnitude of the magnetic field force of each of the second coils (610) and the second magnetic members (520) is adjusted by the relative position signal to keep the rotating shaft (300) separated from the inner wall of the guide hole (600 a).
6. Magnetic levitation fan apparatus according to claim 5, wherein the second magnetic member (520), the rotating shaft (300), the support member (310), the rotor structure (100) and the fan blade (200) are connected as a whole, the center of gravity of the whole being located on the support member (310).
7. The magnetic levitation fan apparatus according to claim 2, wherein the fan blade (200) is provided at its outer circumference with a ring-shaped weight (210) concentrically arranged with the rotation shaft (300).
8. The magnetic levitation fan apparatus according to claim 1, further comprising a weight (210), the weight (210) being disposed on at least one of the rotor structure (100), the rotating shaft (300), the support (310) and the fan blade (200).
9. Magnetic levitation fan apparatus according to claim 1, wherein the stator structure (400) is provided with grooves (700) and the support (310) is provided with tips (320) that can be supported in the grooves (700).
10. The magnetic levitation fan apparatus according to claim 1, further comprising a bearing (720), the support (310) being supported on the rotor structure (100) by the bearing (720).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911280486.8A CN110855028B (en) | 2019-12-13 | 2019-12-13 | Magnetic suspension fan device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911280486.8A CN110855028B (en) | 2019-12-13 | 2019-12-13 | Magnetic suspension fan device |
Publications (2)
| Publication Number | Publication Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112437363A (en) * | 2020-10-30 | 2021-03-02 | 深圳市火乐科技发展有限公司 | Suspension type loudspeaker and audio output equipment |
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| CN110410341A (en) * | 2018-04-27 | 2019-11-05 | 长春市苏伟磁悬浮技术研究所 | A kind of magnetic suspension blower |
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| CN2414249Y (en) * | 2000-01-24 | 2001-01-10 | 台达电子工业股份有限公司 | Magnetic suspension bearing device |
| KR20080000179U (en) * | 2006-08-11 | 2008-02-14 | 젠 쥔 위 | Magnetic floating shaft set and apparatus using same |
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