Double-stator magnetic suspension vane-type fan

Abstract

The application discloses a double-stator magnetic suspension blade type fan, which comprises a shell, a middle shaft arranged in the shell, an outer ring stator group, an inner ring stator group and a permanent magnet blade. The inner ring stator group comprises a plurality of inner ring stators which are uniformly distributed around the middle shaft. The outer ring stator group comprises a plurality of outer ring stators which are uniformly distributed outside the inner ring stator group. The inner ring stator group, the outer ring stator group and the middle shaft are coaxial. The permanent magnet blade is suspended between the inner ring stator group and the outer ring stator group and rotates around the axis of the inner ring stator group along the axis direction of the middle shaft. The shell is provided with an air inlet and an air outlet. The application eliminates the abrasion caused by the mechanical transmission type blade, solves the problem of the reduced service life of the traditional fan, and eliminates the traditional bearing transmission mode of the motor, thus being beneficial to improving the service life of the fan.

Description

Technical Field

[0001] This invention belongs to the field of wind turbine technology, specifically relating to a dual-stator magnetic levitation blade wind turbine. Background Technology

[0002] Currently available fans mainly consist of a motor and fan blades. The motor has a stator and a rotor, with the fan blades fixed to the motor shaft. By sequentially energizing the stator, magnetic thrust is generated, driving the motor shaft to rotate, which in turn drives the fan blades. Since all components are mechanically driven, mechanical wear is inevitable during operation, reducing the fan's lifespan and significantly limiting its speed. Furthermore, the mechanical transmission driving the blades generates considerable mechanical noise.

[0003] Currently, there are also fans controlled by magnetic force, such as a permanent magnet magnetic flux levitation motor and fan (2020110351315), which is a magnetic levitation motor. However, the blades still need to be connected to the connecting shaft of the base. Such a structure still limits the fan speed, and the connection between the base and other components still brings a lot of mechanical noise.

[0004] Therefore, it is necessary to improve the structure of the fan. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention aims to provide a dual-stator magnetic levitation blade fan that eliminates wear caused by mechanically driven blades, solves the problem of reduced lifespan of traditional fans, and eliminates the traditional method of motor transmission via bearings, thereby improving the fan's lifespan.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is as follows:

[0007] A dual-stator magnetic levitation blade fan includes a housing and a central shaft, an outer stator assembly, an inner stator assembly, and permanent magnet blades disposed within the housing. The inner stator assembly includes multiple inner stators evenly distributed around the central shaft. The outer stator assembly includes multiple outer stators evenly distributed outside the inner stator assembly. The inner stator assembly, outer stator assembly, and central shaft are coaxial. The permanent magnet blades are suspended between the inner and outer stator assemblies and rotate about the axis of the inner stator assembly along the axial direction of the central shaft. The housing is provided with an air inlet and an air outlet.

[0008] Preferably, the inner and outer polarities of the permanent magnet blades are opposite, with the inner surface of the permanent magnet blades facing the inner stator assembly and the outer surface of the permanent magnet blades facing the outer stator assembly.

[0009] More preferably, the polarity of the inner ring stator assembly facing the permanent magnet blade is the same as the polarity of the inner surface of the permanent magnet blade;

[0010] In the outer stator group, the outer stator located in front of the permanent magnet blade has a polarity opposite to that of the permanent magnet blade, while the polarity of the other outer stators facing the permanent magnet blade is the same as that of the permanent magnet blade.

[0011] More preferably, in the outer stator group, the current intensity increases from the top outer stator to the bottom outer stator.

[0012] Preferably, the permanent magnet blade is arc-shaped and bends inward toward the inner stator assembly.

[0013] Preferably, the plurality of inner ring stators and the plurality of outer ring stators are arranged alternately.

[0014] Preferably, an insulating silicone layer is provided on the surface of the permanent magnet blade.

[0015] Preferably, the number of inner ring stator groups is greater than or equal to two groups, and the multiple groups of inner ring stator groups are distributed back and forth along the axial direction of the central shaft, with the permanent magnet blades located outside the multiple groups of inner ring stator groups.

[0016] More preferably, in the inner ring stator group located at the rear end of the central shaft member, the current intensity of the multiple inner ring stators is the same; in the inner ring stator group located at the front end of the central shaft member, the current intensity of the top inner ring stator and the bottom inner ring stator increases progressively.

[0017] Preferably, the number of outer ring stator groups is greater than or equal to two groups, and the multiple groups of outer ring stator groups are distributed back and forth along the axial direction of the housing.

[0018] Beneficial effects:

[0019] This invention eliminates the wear caused by mechanically driven blades, solves the problem of reduced lifespan of traditional fans, and eliminates the traditional method of motor transmission by bearings, which helps to improve the lifespan of fans.

[0020] The blades of this invention adopt a magnetic levitation mode, which eliminates the speed limit caused by mechanical transmission, increases the blade speed, and increases the air volume.

[0021] Compared to traditional fans, this invention eliminates the rotor, replacing it with blades, thus eliminating mechanical transmission noise, which is mainly the noise from cutting through the air. This helps reduce noise levels. Furthermore, the absence of a rotor reduces the need for dynamic balancing tests, significantly increasing bearing reliability and production tolerance. Attached Figure Description

[0022] Figure 1 The diagram shown is an external schematic of the present invention;

[0023] Figure 2 The diagram shown is an internal schematic of the present invention;

[0024] Figure 3 The diagram shows the inner stator assembly and permanent magnet blades.

[0025] Figure 4 The diagram shows the positional relationship between the inner stator assembly, the outer stator assembly, and the permanent magnet blades.

[0026] Figure 5 The image shown is an exploded view of the present invention;

[0027] Figure 6 The diagram shown illustrates the operating principle of this invention.

[0028] Figure 7 The diagram shows the polarity of a permanent magnet blade.

[0029] Figure 8 The diagram shows the polarity of the permanent magnet blades between the inner and outer stator groups.

[0030] Figure 9 The diagram shows the polarity of the two inner ring stator groups.

[0031] Reference numerals: 1-shell, 2-inner stator assembly, 3-outer stator assembly, 4-permanent magnet blade;

[0032] 11-Air outlet, 21-Central shaft, 22-Inner ring stator, 23-Inner ring baffle, 24-First mounting post, 31-Outer ring stator, 32-Outer ring baffle, 33-Second mounting post. Detailed Implementation

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0034] This invention provides a dual-stator magnetic levitation blade fan, comprising a housing 1 and a central shaft 21, an outer stator assembly 3, an inner stator assembly 2, and permanent magnet blades 4 disposed within the housing 1. Figure 1-9As shown, the inner stator group 2 includes multiple inner stators 22, which are evenly distributed around the central shaft 21 in a circular pattern. The outer stator group 3 includes multiple outer stators 31, which are evenly distributed outside the inner stator group 2 in a circular pattern. The inner stator group 2, outer stator group 3, and central shaft 21 are coaxial. The permanent magnet blade 4 is located between the inner stator group 2 and the outer stator group 3. The polarities of the inner and outer surfaces of the permanent magnet blade 4 are opposite. The inner surface of the permanent magnet blade 4 faces the inner stator group 2, and the outer surface of the permanent magnet blade 4 faces the outer stator group 3. Along the axial direction of the central shaft 21, the housing 1 is provided with an air inlet and an air outlet 11.

[0035] In this invention, multiple outer ring stators 31 and multiple inner ring stators 22 are independently controlled for power supply. In the outer ring stator group 3, the current intensity increases from the top outer ring stator 31 to the bottom outer ring stator 31.

[0036] For ease of description, the polarity of the inner stator 22 mentioned below refers to the polarity of the end of the inner stator 22 facing the permanent magnet blade 4, and the polarity of the outer stator 31 refers to the polarity of the end of the outer stator 31 facing the permanent magnet blade 4. The end of the central shaft 21 near the air inlet of the housing 1 is the rear end of the central shaft 21, and the end of the central shaft 21 near the air outlet 11 of the housing 1 is the front end of the central shaft 21. Taking the direction of rotation of the permanent magnet blade 4 as a reference, the front of the permanent magnet blade 4 is in the same direction as the rotation of the permanent magnet.

[0037] In this invention, the polarity of the inner stator group 2 is the same as the inner surface polarity of the permanent magnet blade 4, ensuring that the permanent magnet blade 4 never contacts the inner stator group 2. In the outer stator group 3, the polarity of the outer stator 31 located in front of the permanent magnet blade 4 is opposite to the outer surface polarity of the permanent magnet blade 4, while the polarities of the remaining outer stator groups 3 are the same as the outer surface polarity of the permanent magnet blade 4. The inner stator group 2 and the outer stator group 3 allow the permanent magnet blade 4 to remain suspended, while the polarity of the outer stator 31 located in front of the permanent magnet blade 4, opposite to the outer surface polarity of the permanent magnet blade 4, drives the permanent magnet to rotate around the inner stator group 2. The working principle of this invention is as follows:

[0038] When the fan starts operating, the inner stator group 2 and the outer stator group 3 are energized simultaneously. The permanent magnet blades 4 are suspended between the inner stator group 2 and the outer stator group 3. Preferably, the current increases from the top outer stator 31 to the bottom outer stator 31 of the outer stator group 3, with the maximum current at the bottom outer stator 31, to overcome the weight of the blades. The position of the permanent magnet blades 4 does not need to be determined. When the outer stator 31 changes its magnetic pole position by one revolution, the permanent magnet blades 4 will automatically rotate in the direction of the force. The polarity of the outer surface of the permanent magnet blades 4 is the same as that of the outer stator 31, generating a repulsive force. The polarity of the inner surface of the permanent magnet blades 4 is the same as that of the inner stator 22, also generating a repulsive force. By periodically changing the polarity of one of the outer stators 31 in the outer stator group 3, the permanent magnet blades 4 can be driven to rotate rapidly. The higher the periodic frequency, the faster the rotation.

[0039] For example, taking the case where the inner surface of the permanent magnet blade 4 is an N pole and the outer surface is an S pole, multiple inner stators 22 are all N poles, the outer stator 31 located in front of the permanent magnet blade 4 is an N pole, and the rest of the outer stators 31 are S poles. Since the polarity of the outer stator 31 with the N pole is opposite to that of the outer surface of the permanent magnet blade 4, the permanent magnet blade 4 has a tendency to move forward. At this time, the repulsive force of the inner stator 22 and the outer stator 31 on the permanent magnet blade 4 plays the role of pushing force, causing the permanent magnet blade 4 to move forward. It should be noted that since the multiple outer stators 31 are independently controlled and powered, the polarity of all outer stators 31 can be changed to attract or repel the outer polarity of the permanent magnet blade 4. By periodically changing the polarity of the outer stators 31, the polarity of one outer stator 31 in front of the permanent magnet blade 4 is always opposite to the outer polarity of the permanent magnet blade 4, which can drive the blade to rotate rapidly around the inner stator group 2. By gradually increasing the alternating frequency of the outer stators 31, the rotational speed of the permanent magnet blade 4 can be continuously increased.

[0040] In this invention, when the fan is not powered on, the permanent magnet blade 4 is not affected by the inner and outer stator groups 3. When the fan is powered on, under the action of the inner stator group 2 and the outer stator group 3, the permanent magnet blade 4 is in a suspended state. It is easy to understand that the inner and outer stator groups 3 are not only for suspending the permanent magnet blade 4, but also for rotating the permanent magnet blade 4. Therefore, the repulsive forces of the inner stator group 2 and the outer stator group 3 on the permanent magnet blade 4 need to be avoided from canceling each other out, so as to avoid the permanent magnet blade 4 merely being suspended.

[0041] In this invention, the rotational speed of the permanent magnet blade 4 is related to the polarity intensity of the outer stator group 3 and the inner stator group 2. During the periodic change of the polarity of one of the outer stators 31, when the periodic frequency is increased, the current intensity of the inner stator group 2 and the outer stator group 3 is increased, thereby increasing the rotational speed of the permanent magnet blade 4; when the periodic frequency is decreased, the current intensity of the inner stator group 2 and the outer stator group 3 is decreased, thereby decreasing the rotational speed of the permanent magnet blade 4.

[0042] In this invention, the permanent magnet blade 4 is generally arc-shaped to facilitate air cutting. During rotation, the permanent magnet blade 4 delivers a large air volume. The arc shape of the permanent magnet blade 4 is as follows: Figure 1-5 As shown, it resembles a shape that encloses the inner ring stator group 2.

[0043] Furthermore, the multiple inner stators 22 and multiple outer stators 31 are staggered to prevent the forces on the inner and outer surfaces of the permanent magnet blade 4 from canceling each other out, thus preventing the permanent magnet blade 4 from stopping rotation and suspending in the air. (See attached diagram.) Figure 2 and 4 The meaning of staggered arrangement is that, from the radial direction of the central shaft 21, the inner ring stator 22 is located between two adjacent outer ring stators 31, that is, to avoid a one-to-one correspondence between the inner ring stator 22 and the outer ring stator 31.

[0044] Furthermore, the surface of the permanent magnet blade 4 is coated with an insulating silicone layer. The function of the insulating silicone layer is to prevent the permanent magnet blade 4 from generating current transmission when cutting the magnetic field lines between the inner and outer ring stators 31. Secondly, when the operation stops, the permanent magnet blade 4 generates less noise or even no noise when it falls between the inner ring stator 22 and the outer ring stator 31 at the bottom.

[0045] In this invention, the number of inner stator groups 2 can be greater than or equal to two groups. Multiple inner stator groups 2 are distributed along the axial direction of the central shaft 21, with the permanent magnet blade 4 simultaneously located outside multiple inner stator groups 2. More specifically, within the inner stator groups 2 located at the rear end of the central shaft 21, the current intensity of multiple inner stators 22 is the same; within the inner stator groups 2 located at the front end of the central shaft 21, the current intensity of the top inner stator 22 increases from the bottom inner stator 22. The rear end of the permanent magnet blade 4 is subjected to a constant repulsive force from the rear inner stator groups 2, while the front end of the permanent magnet blade 4 is subjected to a varying repulsive force from the front inner stator groups 2, facilitating the rotation of the permanent magnet blade 4 between the inner stator groups 2 and the outer stator groups 3.

[0046] Preferred, combined with appendix Figure 3 The size of the inner ring stator group 2 located at the rear end of the central shaft member 21 is smaller than that of the inner ring stator group 2 located at the front end of the central shaft member 21. This is related to the shape of the permanent magnet blade 4. It is easy to understand that the size of the multiple inner ring stator groups 2 is determined according to the needs and the shape of the permanent magnet blade 4.

[0047] In this invention, the number of outer ring stator groups 3 can be greater than or equal to two groups, and multiple groups of outer ring stator groups 3 are distributed back and forth along the axial direction of the housing 1. It is easy to understand that the arrangement of multiple groups of outer ring stator groups 3 within the housing 1 is similar.

[0048] In this invention, the central shaft component 21 is provided with a plurality of first mounting posts 24 and a plurality of inner ring baffles 23 adapted to the inner ring stator assembly 2, such as Figure 2-4 As shown, multiple first mounting posts 24 are evenly distributed along the circumference of the central shaft 21. The first mounting posts 24 are fixedly connected to the central shaft 21 along the radial direction of the central shaft 21. The inner ring stator 22 is sleeved on the first mounting posts 24. The outer end of the first mounting posts 24 is connected to the inner ring baffle 23. The outer surface of the inner ring baffle 23 is arc-shaped and matches the shape of the permanent magnet blade 4. The inner ring baffle 23 serves to protect the inner ring stator 22.

[0049] The inner side of the housing 1 is provided with a plurality of second mounting posts 33 and a plurality of outer ring baffles 32 along the circumferential direction to fit the outer ring stator assembly 3, such as Figure 2 As shown, the second mounting post 33 is fixedly connected to the housing 1 along the inner radial direction of the housing 1. The outer ring stator 31 is sleeved on the second mounting post 33. The inner end of the second mounting post 33 is connected to the outer ring baffle 32. The outer surface of the outer ring baffle 32 is arc-shaped and matches the shape of the permanent magnet blade 4. The permanent magnet blade 4 is located between the inner ring baffle 23 and the outer ring baffle 32. The outer ring baffle 32 plays the role of protecting the outer ring stator 31.

[0050] The technical solution of the present invention will be described below through specific embodiments.

[0051] In this embodiment, the inner ring stator group 2 consists of two groups, arranged front and rear along the central shaft member 21, as follows: Figure 3 As shown, the inner ring stator group 2 located at the front end of the central shaft member 21 is larger than the inner ring stator group 2 located at the rear end of the central shaft member 21. Each inner ring stator group 2 contains 16 inner ring stators 22. There are also two outer ring stator groups 3, located within the housing 1. Each outer ring stator group 3 contains 16 outer ring stators 31, as shown... Figure 2 As shown.

[0052] The polarity relationship and motion trend of the permanent magnet blade 4 between the outer stator group 3 and the inner stator group 2 are as follows: Figure 6-7 As shown, at this time, the permanent magnet blade 4 is above the inner stator group 2 and below the outer stator group 3. The polarity of the outer stator 31, located to the upper left and in front of the permanent magnet blade 4, is opposite to the polarity of the outer surface of the permanent magnet blade 4. The polarity of the remaining outer stators 31 is the same as the polarity of the outer surface of the permanent magnet blade 4. The polarity of the inner stator 22 is the same as the polarity of the inner surface of the permanent magnet blade 4. Figure 6 From a perspective, the permanent magnet blade 4 rotates counterclockwise. By periodically changing the polarity of one of the outer ring stators 31 of the outer ring stator group 3 in the counterclockwise direction, the permanent magnet blade 4 can be driven to rotate rapidly. The higher the periodic frequency of the change, the faster the rotation.

[0053] Within the same group of outer stator groups 3, the current increases from the top outer stator 31 to the bottom outer stator 31, with the bottom outer stator 31 having the largest current, which is used to overcome the gravity of the permanent magnet blades 4. Figure 8 This diagram shows a partial view of a set of outer stators 31 and a set of inner stators 22 after they have been flattened. The polarity changes of adjacent outer stators 31 / inner stators 22 are illustrated. For ease of understanding, the rotation of the permanent magnet blades 4 within the housing 1 is converted into… Figure 8 The linear motion of the permanent magnet blade 4 shown is easy to understand. The polarity of the outer stator 31 in front of the permanent magnet blade 4 is opposite to the polarity of the outside of the permanent magnet blade 4. This is equivalent to the front end of the permanent magnet blade 4 being subjected to a pulling force and the rear end being subjected to a pushing force. As long as the polarity of the outer stator 31 in front of the permanent magnet blade 4 is always opposite to the polarity of the outside of the permanent magnet blade 4, the permanent magnet blade 4 will always be in motion.

[0054] like Figure 8 As shown, looking along the direction of movement of the permanent magnet blade 4, the polarities of the outer stators 31 corresponding to the outer positions of the permanent magnet blade 4 from right to left are 1.5S (1.5 times the polarity of S, the same below), 1.4S, 1.3S, 1.2S, 1.1S, S, and N. Clearly, the outer stator 31 with polarity N plays a role in pulling the permanent magnet blade 4 forward. The outer stator 31 located at the rear end of the permanent magnet blade 4 has a larger polarity and a greater pushing effect on the permanent magnet blade 4. Similarly, the polarities of the inner stators 22 corresponding to the inner positions of the permanent magnet blade 4 from right to left are 1.6N, 1.5N, 1.4N, 1.3N, 1.2N, 1.1N, and N. The effect of their polarity changes is similar to that of the outer stator group 3, preventing the permanent magnet blade 4 from locking in the positions of the outer stator group 3 and the inner stator group 2.

[0055] It should be noted that during the rotation of the permanent magnet blade 4, the effect of gravity on the permanent magnet blade 4 cannot be omitted. In the outer ring stator group 3, the current of the outer ring stator 31 from the top to the bottom increases, and the current of the bottom outer ring stator 31 is the largest. When the permanent magnet blade 4 moves to the bottom, apart from the outer ring stator 31 that pulls the permanent magnet blade 4, the other outer ring stators 31 have a larger current, which can prevent the permanent magnet blade 4 from hitting the outer ring stator 31.

[0056] It should be noted that, Figure 6 The position of the permanent magnet blade 4 and Figure 8 , 9 The positions of the permanent magnet blades 4 are not the same.

[0057] The embodiments provided by the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention, and the descriptions of the embodiments above are only for the purpose of helping to understand the core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A dual-stator magnetic levitation blade fan, characterized in that, The device includes a housing (1) and a central shaft (21), an outer ring stator group (3), an inner ring stator group (2), and a permanent magnet blade (4) disposed within the housing (1). The inner ring stator group (2) includes multiple inner ring stators (22), which are evenly distributed around the central shaft (21). The outer ring stator group (3) includes multiple outer ring stators (31), which are evenly distributed outside the inner ring stator group (2). The inner ring stator group (2), the outer ring stator group (3), and the central shaft (21) are coaxial. The permanent magnet blade (4) is suspended between the inner ring stator group (2) and the outer ring stator group (3), and the permanent magnet blade (4) rotates about the axis of the inner ring stator group (2) along the axis of the central shaft (21). The housing (1) is provided with an air inlet and an air outlet (11). The permanent magnet blade (4) is arc-shaped as a whole. The permanent magnet blade (4) is bent towards the inner ring stator group (2). The polarity of the inner and outer surfaces of the permanent magnet blade (4) is opposite. The inner surface of the permanent magnet blade (4) faces the inner ring stator group (2), and the outer surface of the permanent magnet blade (4) faces the outer ring stator group (3). The polarity of the inner ring stator group (2) facing the permanent magnet blade (4) is the same as the polarity of the inner surface of the permanent magnet blade (4); The outer stator (31) in the outer ring stator group (3) located in front of the permanent magnet blade (4) has a polarity opposite to that of the permanent magnet blade (4) facing the permanent magnet blade (4), while the polarity of the other outer ring stators (31) facing the permanent magnet blade (4) is the same as that of the permanent magnet blade (4) facing the permanent magnet blade (4). In the outer ring stator group (3), the current intensity increases from the top outer ring stator (31) to the bottom outer ring stator (31).

2. The dual-stator magnetic levitation blade fan according to claim 1, characterized in that, The multiple inner ring stators (22) and the multiple outer ring stators (31) are arranged alternately.

3. The dual-stator magnetic levitation blade fan according to claim 1 or 2, characterized in that, An insulating silicone layer is provided on the surface of the permanent magnet blade (4).

4. The dual-stator magnetic levitation blade fan according to claim 1, characterized in that, The number of inner ring stator groups (2) is greater than or equal to two groups, and multiple groups of inner ring stator groups (2) are distributed back and forth along the axial direction of the central shaft (21), and the permanent magnet blades (4) are located outside the multiple groups of inner ring stator groups (2).

5. The dual-stator magnetic levitation blade fan according to claim 4, characterized in that, In the inner ring stator group (2) located at the rear end of the central shaft (21), the current intensity of the multiple inner ring stators (22) is the same; in the inner ring stator group (2) located at the front end of the central shaft (21), the current intensity of the inner ring stator (22) at the top to the inner ring stator (22) at the bottom increases.

6. The dual-stator magnetic levitation blade fan according to claim 1, characterized in that, The number of outer ring stator groups (3) is greater than or equal to two groups, and the multiple groups of outer ring stator groups (3) are distributed back and forth along the axial direction of the housing (1).

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