Small micro-wind power generation equipment

Abstract

The application belongs to the field of wind power generation, and particularly relates to a small micro-wind wind power generation device, which comprises a fixed shaft, a rotating shaft sleeve, a magnetic floating bearing assembly, a blade assembly and a generator; the rotating shaft sleeve is coaxially arranged on the fixed shaft; the magnetic floating bearing assembly comprises an axial magnetic floating bearing and two radial magnetic floating bearings; the stators of the axial magnetic floating bearing and the radial magnetic floating bearings are fixedly connected with the fixed shaft, and the rotors are fixedly connected with the rotating shaft sleeve. The magnetic floating bearing assembly realizes the rotating cooperation of the fixed shaft and the rotating shaft sleeve, and the stators of the axial magnetic floating bearing and the two radial magnetic floating bearings, the rotating shaft sleeve and the fixed shaft are arranged in gaps in sequence, which can ensure the fixing stability of the stators in the axial magnetic floating bearing and the radial magnetic floating bearings on one hand, and can ensure the relatively closed position of the rotors in the axial magnetic floating bearing and the radial magnetic floating bearings and the rotating shaft sleeve on the other hand, while ensuring the lightweight structure of the rotors and the rotating shaft sleeve and reducing the wind power loss.

Description

Technical Field

[0001] This invention belongs to the field of wind power generation, specifically relating to a small-scale micro-wind power generation device. Background Technology

[0002] Wind energy is a clean and renewable energy source, and wind power generation has received widespread attention worldwide. Traditional horizontal-axis wind turbines use inefficient gearboxes, mechanical bearings, and synchronous generators, resulting in high wind speeds and severe mechanical wear during startup, leading to very low utilization rates. To address these issues, magnetic levitation micro-wind generators, exemplified by Chinese patent application "CN106609731A A Magnetic Levitation Micro-Wind Generator," utilize magnetic levitation generators to convert wind-cooled energy into electrical energy. However, the rotational connection between the fixed and rotating parts of this turbine is not optimal. The motor's rotating shaft and blades are fixed to the upper end of the motor's mounting column, raising concerns about the reliability of the rotating part's fixation and resulting in significant relative rotational losses, hindering efficient wind power generation. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a small-scale micro-wind power generation device with low loss and stable and reliable structural connection.

[0004] This invention provides a small-scale micro-wind power generation device, including a fixed shaft, a rotating bushing, a magnetic levitation bearing assembly, a blade assembly, and a generator;

[0005] The rotating bushing is coaxially rotatably mounted on the fixed shaft;

[0006] The magnetic levitation bearing assembly is used for contactless rotatable connection between the fixed shaft and the rotating bushing, including an axial magnetic levitation bearing and two radial magnetic levitation bearings arranged along the axial direction of the fixed shaft. The stators of the axial magnetic levitation bearing and the radial magnetic levitation bearing are fixedly connected to the fixed shaft, and the rotors are fixedly connected to the rotating bushing.

[0007] The blade assembly includes an S-type wind turbine and an H-type vertical blade fixed on the rotating shaft sleeve, wherein the S-type wind turbine and the H-type vertical blade are disposed between two radial magnetic levitation bearings.

[0008] The rotating component of the generator is fixedly connected to the rotating shaft sleeve, and the fixed component is fixedly connected to the fixed shaft.

[0009] Furthermore, the axial magnetic levitation bearing, one of the radial magnetic levitation bearings, the blade assembly, the generator, and the other radial magnetic levitation bearing are arranged sequentially from the upper end to the lower end of the fixed shaft, and the stators of the axial magnetic levitation bearing and the lower radial magnetic levitation bearing are fixedly connected to the fixed shaft.

[0010] Furthermore, one rotating bushing is provided at the upper end and one at the lower end of the fixed shaft, and the two ends of the S-shaped wind turbine are respectively fixedly connected to the two rotating bushings, and the S-shaped wind turbine and the two rotating bushings are connected as one unit.

[0011] Furthermore, a permanent magnet bearing is provided between the two rotating bushings on opposite sides and the fixed shaft.

[0012] Furthermore, the rotating assembly of the generator is fixedly connected to the rotating bushing and the S-shaped wind turbine, and the S-shaped wind turbine, the rotating assembly of the generator, and the two rotating bushings are connected as one unit.

[0013] Furthermore, two sets of S-shaped wind turbines are arranged sequentially along the axial direction of the fixed shaft, and the blades of the two sets of S-shaped wind turbines are 90° apart.

[0014] Furthermore, the H-shaped vertical blade includes several vertical blades and two sets of supports respectively set at both ends of the S-shaped wind turbine. Each set of supports is arranged in a circular array around a fixed axis. A vertical blade is connected by two sets of corresponding supports, and the vertical blade is parallel to the fixed axis.

[0015] Furthermore, the rotor of the axial magnetic levitation bearing is provided with a thrust disk, the stator of the axial magnetic levitation bearing is provided with a friction disk, and the axial clearance of the axial magnetic levitation bearing can be adjusted to accommodate the gap between the thrust disk and the friction disk.

[0016] Furthermore, it also includes sensors for detecting the axial and radial clearances of the magnetic levitation bearing assembly.

[0017] Furthermore, it also includes a base that is fixedly connected to the stator of the radial magnetic levitation bearing located below.

[0018] The beneficial effects of this invention are that the small-scale micro-wind power generation equipment provided by this invention achieves contactless connection between the blade assembly and the fixed shaft through axial magnetic levitation bearings and two radial magnetic levitation bearings, thereby reducing wind power loss, reducing the difficulty of wind turbine start-up, and improving the power generation efficiency of the wind turbine. The stator and rotor of the axial magnetic levitation bearings and the two radial magnetic levitation bearings are fitted with the fixed shaft and the rotating shaft sleeve respectively, achieving rotational fit between the fixed shaft and the rotating shaft sleeve. Furthermore, the stator, rotating shaft sleeve, and fixed shaft of the axial magnetic levitation bearings and the two radial magnetic levitation bearings are arranged with a gap in between. This ensures the stability of the stator in the axial magnetic levitation bearings and the relatively closed position of the rotor and rotating shaft sleeve in the axial magnetic levitation bearings and the rotating shaft sleeve, while also ensuring the lightweight structure of the rotor and rotating shaft sleeve and reducing wind power loss. Attached Figure Description

[0019] Appendix Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Appendix Figure 2 This is the front view of the present invention;

[0021] Appendix Figure 3 for Figure 2 Sectional view along line AA;

[0022] Appendix Figure 4 for Figure 2 Sectional view along the BB direction;

[0023] Appendix Figure 5 for Figure 2 Partial sectional view at point C;

[0024] Appendix Figure 6 for Figure 2 Partial sectional view at point D;

[0025] Appendix Figure 7 This is a schematic diagram of the structure of the axial magnetic bearing, the radial magnetic bearing, and the rotating part of the sensor in this invention;

[0026] Appendix Figure 8 This is a schematic diagram of the radial magnetic levitation bearing rotor in this invention;

[0027] Appendix Figure 9 This is a schematic diagram of the rotating part of the sensor in this invention;

[0028] Appendix Figure 10 This is a schematic diagram of the structure of the fixed shaft and rotating bushing in this invention.

[0029] In the diagram, 1-fixed shaft; 2-rotating bushing; 3-magnetic levitation bearing assembly; 31-axial magnetic levitation bearing; 311-outer shell II; 312-bearing stator; 313-electromagnetic coil; 314-rotor core II; 315-thrust disc; 316-friction disc; 32-radial magnetic levitation bearing; 321-outer shell I; 322-magnetic yoke; 323-stator core; 324-magnetic pole coil; 325-rotor core I; 4-blade assembly; 41-S-type wind turbine; 42-H-type vertical blade; 421-vertical blade; 422-support; 5-generator; 6-sensor; 61-radial measuring coil; 62-axial measuring coil; 63-coil core; 64-circuit board; 65-tested core; 7-permanent magnet bearing; 71-moving magnetic ring; 72-stationary magnetic ring; 8-base. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0032] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0035] As attached Figure 1 - Appendix Figure 10 As shown, the present invention provides a small-scale micro-wind power generation device, including a fixed shaft 1, a rotating bushing 2, a magnetic levitation bearing assembly 3, a blade assembly 4, and a generator 5;

[0036] The rotating bushing 2 is coaxially rotatably mounted on the fixed shaft 1, that is, the rotating bushing 2 has a cylindrical structure and is sleeved on the outside of the fixed shaft 1;

[0037] The magnetic levitation bearing assembly 3 is used for contactless rotatable connection between the fixed shaft 1 and the rotating bushing 2. It includes an axial magnetic levitation bearing 31 and two radial magnetic levitation bearings 32 arranged axially along the fixed shaft 1. The stators of the axial magnetic levitation bearings 31 and 32 are fixedly connected to the fixed shaft 1, and the rotors are fixedly connected to the rotating bushing 2. The stators of both the axial magnetic levitation bearings 31 and 32 are outer rings and their electromagnet assemblies, while the rotors are iron core assemblies fixed to the rotating bushing 2. Since the rotating shaft... The sleeve 2 is set outside the fixed shaft 1, while the stators of the axial magnetic bearing 31 and the radial magnetic bearing 32 are set outside the rotating sleeve 2. Therefore, the stators of the axial magnetic bearing 31 and the radial magnetic bearing 32 are fixedly connected to the end of the fixed shaft 1, forming an enclosing structure that surrounds the rotating sleeve 2. That is, the cross-sectional shape of the fixed shaft 1 and the stators of the axial magnetic bearing 31 and the radial magnetic bearing 32 is an inverted "mountain" shaped structure and a rotating body structure. The rotating sleeve 2 is fitted inside the inverted "mountain" shaped arc groove of the rotating body.

[0038] Two radial magnetic bearings 32 arranged along the fixed shaft 1 are used to ensure the radial contactless rotation of the rotating sleeve 2 on the fixed shaft 1, and the axial magnetic bearing 31 is used to realize the axial contactless rotation of the rotating sleeve 2 on the fixed shaft 1. Thus, when the magnetic bearing assembly 3 is working and levitating, the rotating sleeve 2 is connected to the fixed shaft 1 with contactless transmission. When the magnetic bearing assembly 3 is not working and levitating, the entire levitating part is supported by the thrust plate 315 of the axial magnetic bearing 31 on the bearing stator 312 of the axial magnetic bearing 31. Since the bearing stator 312 is fixed on the fixed shaft 1, the entire levitating part is supported on the fixed shaft 1.

[0039] The blade assembly 4 includes an S-shaped wind turbine 41 and an H-shaped vertical blade 42 fixed on the rotating bushing 2. The S-shaped wind turbine 41 and the H-shaped vertical blade 42 are disposed between two radial magnetic levitation bearings 32. The blade assembly 4 is fixed on the rotating bushing 2, allowing the blade assembly 4 to rotate relative to the fixed shaft 1 without contact, thus driving the rotation of the magnetic levitation bushing 2. The blade assembly 4 includes the S-shaped wind turbine 41 and the H-shaped vertical blade 42. The H-shaped vertical blade 42 receives lower torque during startup and does not have a high torque. It has good self-starting capability, but the tip speed ratio can be very high. Under the same manufacturing cost and wind turbine weight, it has high power output. Compared with H-type vertical blades 42, the S-type wind turbine 41 can have a very low starting wind speed and starting rotation speed. However, due to the characteristics of its wind turbine structure, its maximum wind energy conversion rate is relatively low, generally less than 25%, and it cannot be used for large-scale wind power generation. This invention combines the S-type wind turbine 41 and H-type vertical blades 42. The S-type wind turbine 41 can achieve micro-wind start-up, and the H-type vertical blades 42 can achieve micro-wind power generation.

[0040] The rotating component of the generator 5 is fixedly connected to the rotating bushing 2, and the fixed component is fixedly connected to the fixed shaft 1. Then, after the blade assembly 4 drives the rotating bushing 2 to rotate, the rotating bushing 2 drives the rotating component of the generator 5 to rotate, thereby driving the generator 5 to generate electricity.

[0041] The small-scale micro-wind power generation device provided by this invention achieves a contactless connection between the blade assembly 4 and the fixed shaft 1 through an axial magnetic levitation bearing 31 and two radial magnetic levitation bearings 32, thereby reducing wind power loss, reducing the difficulty of starting the wind turbine, and improving the power generation efficiency of the wind turbine. The matching relationship between the stator and rotor of the axial magnetic levitation bearing 31 and the two radial magnetic levitation bearings 32 and the fixed shaft 1 and the rotating shaft sleeve 2 is such that the stator of the axial magnetic levitation bearing 31 and the two radial magnetic levitation bearings 32 is fixed to the fixed shaft 1, and the rotor is fixed to the rotating shaft sleeve 2, realizing the rotational matching between the fixed shaft 1 and the rotating shaft sleeve 2. Furthermore, the stator, rotating shaft sleeve 2, and fixed shaft 1 of the axial magnetic levitation bearing 31 and the two radial magnetic levitation bearings 32 are arranged with a gap in sequence. On the one hand, this can ensure the fixed stability of the stator in the axial magnetic levitation bearing 31 and the radial magnetic levitation bearing 32. On the other hand, it can ensure that the position of the rotor and the rotating shaft sleeve 2 in the axial magnetic levitation bearing 31 and the radial magnetic levitation bearing 32 is relatively closed. At the same time, it can ensure the lightweight structure of the rotor and the rotating shaft sleeve 2, reducing wind power loss.

[0042] The radial magnetic levitation bearing 32 includes a stator and a rotor. The stator includes a housing I 321, a magnetic yoke 322 disposed in the housing I 321, a plurality of stator cores 323 disposed on the magnetic yoke 322, and magnetic pole coils 324 wound on the stator cores 323. The rotor includes a rotor core I 325 fixed to the outer ring of the rotating bushing 2.

[0043] The axial magnetic levitation bearing 31 includes a stator and a rotor. The stator includes a housing II 311 and a bearing stator 312 and an electromagnetic coil 313 disposed within the housing II 311. The rotor includes a rotor core II 314 fixed to the outer ring of the rotating bushing 2. A friction disc 316 is disposed on the bearing stator 312, and a thrust disc 315 is disposed on the rotor core II 314.

[0044] In one embodiment, an axial magnetic bearing 31, one radial magnetic bearing 32, a blade assembly 4, a generator 5, and another radial magnetic bearing 32 are arranged sequentially from the upper end to the lower end of the fixed shaft 1. The stators of the axial magnetic bearing 31 and the lower radial magnetic bearing 32 are fixedly connected to the fixed shaft 1, that is, the stators of the axial magnetic bearing 31 and the lower radial magnetic bearing 32 are fixedly connected to the upper end and the lower end of the fixed shaft 1, respectively, thereby realizing the rotational cooperation between other components and the fixed shaft 1. The stator of the upper radial magnetic bearing 32 is fixedly connected to the stator of the axial magnetic bearing 31, and is indirectly fixed to the fixed shaft 1 through the stator of the axial magnetic bearing 31.

[0045] In one embodiment, one rotating bushing 2 is provided at the upper end and one at the lower end of the fixed shaft 1. The two ends of the S-shaped wind turbine 41 are respectively fixedly connected to the two rotating bushings 2. The S-shaped wind turbine 41 and the two rotating bushings 2 are connected as one unit. In this embodiment, the S-shaped wind turbine 41 and the two rotating bushings 2 are connected as one unit as the rotating part, which can reduce the weight of the rotating bushings 2, further reduce the loss of wind power, simplify the difficulty of wind power start-up and improve power generation efficiency.

[0046] In one embodiment, a permanent magnet bearing 7 is further provided between the two rotating bushings 2 on opposite sides and the fixed shaft 1. The permanent magnet bearing 7 can reduce the support burden of the magnetic levitation bearing assembly 3. The permanent magnet bearing 7 uses the magnetic field force generated by the permanent magnet to magnetically levitate the rotor. The permanent magnet bearing can be used as both a radial bearing and an axial bearing, and both types of bearings can be either attractive or repulsive. In this device, in order to improve the magnetic levitation stiffness, a repulsive type permanent magnet bearing is specifically selected. The selected bearing magnetization repulsive type multi-ring superimposed passive magnetic bearing consists of a moving magnetic ring 71 and a stationary magnetic ring 72. The moving magnetic ring 71 is fixed to the inner ring of the rotating bushing 2, and the stationary magnetic ring 72 is fixed to the fixed shaft 1. The magnetization direction is axial magnetization. In this embodiment, when installing the permanent magnet bearing 7, the moving magnetic ring 71 and the stationary magnetic ring 72 of the radial permanent magnet bearing 7 can be offset by a certain position in the axial direction. At this time, the permanent magnet bearing 7 can provide radial support force in the radial direction and axial support force in the axial direction, further reducing the support burden of the magnetic levitation bearing assembly 3.

[0047] In one embodiment, the rotating assembly of the generator 5 is fixedly connected to the rotating bushing 2 and the S-shaped wind turbine 41. The S-shaped wind turbine 41, the rotating assembly of the generator 5, and the two rotating bushings 2 are integrated into one unit. In one embodiment, the generator 5 preferably adopts a permanent magnet synchronous motor. Considering the structural form of the micro-wind magnetic levitation wind turbine, i.e., the rotating assembly of the generator 5 and the blade assembly 4 need to maintain the same rotational degree of freedom, an external rotor disc permanent magnet generator is selected. The rotating assembly of the AC generator 5 is composed of magnets with alternating polarities—NSNS, and so on. The size of the coil should be such that the distance between the two legs is equal to the distance between two parallel magnets. The voltage and current generated by this generator 5 depend on the strength of the magnets, the number of turns of wire in the coil, the distance between the coil and the magnets, and the speed at which the magnets pass through the coil. The voltage output by the AC generator composed of the coil and the magnets is alternating current (AC). The direction of the current changes each time the coil passes the magnet. Its rated power can reach 2kW, the rated voltage is 48V / 96V, and the rated speed is 500rpm.

[0048] The rotating assembly of generator 5 is fixed relative to the outer casing of generator 5. At this time, the upper rotating bushing 2, S-type wind turbine 41, the rotating assembly of generator 5 and the lower rotating bushing 2 are connected as a whole as a rotating part, and it is set between the stators of the two radial magnetic levitation bearings 32.

[0049] In one embodiment, two sets of S-shaped wind turbines 41 are sequentially arranged along the axial direction of the fixed shaft 1. The blades of the two sets of S-shaped wind turbines 41 are 90° apart, allowing the top of the wind turbine to utilize the advantage of the S-shaped wind turbines 41 having a large starting torque even at low wind speeds to drive the rotating shaft sleeve 2 to rotate first. The turbine is composed of two sets of S-shaped blades stacked together along a common vertical axis, with each set consisting of two semi-cylindrical blades. The two sets of four blades ensure sufficient collection of wind from different directions. Under low wind speed and non-concentrated wind conditions, the S-shaped wind turbines 41 can self-start, thereby driving the rotation of the lower H-shaped wind blades.

[0050] In one embodiment, the H-shaped vertical blade 42 includes several vertical blades 421 and two sets of brackets 422 respectively disposed at both ends of the S-shaped wind turbine 41. Each set of brackets 422 is arranged in a circular array around the fixed axis 1. A vertical blade 421 is connected by two sets of corresponding brackets 422, and the vertical blade 421 is parallel to the fixed axis 1. In this embodiment, the H-shaped vertical blade 42 is fixed to the S-shaped wind turbine 41 by the brackets 422, instead of being directly installed on the rotating bushing 2, thereby further simplifying the structure of the rotating bushing 2 and improving the fixing reliability of the H-shaped vertical blade 42.

[0051] In one embodiment, the air inlet of the S-type wind turbine 41 is located between two vertical blades 421, thereby preventing the H-type vertical blades 42 from affecting the wind force of the S-type wind turbine 41.

[0052] In one embodiment, a thrust disk 315 is provided on the rotor of the axial magnetic bearing 31, and a friction disk 316 is provided on the stator of the axial magnetic bearing 31. The axial clearance of the axial magnetic bearing 31 can be adjusted to allow for the adjustment of the clearance between the thrust disk 315 and the friction disk 316. In this embodiment, the axial magnetic bearing 31 can be used as a brake. When braking the wind power generation equipment, the axial clearance of the axial magnetic bearing 31 needs to be adjusted so that the thrust disk 315 and the friction disk 316 rub against each other for braking, thus providing safety for equipment inspection and maintenance.

[0053] In one embodiment, a sensor 6 is also included for detecting the axial and radial clearances of the magnetic levitation bearing assembly 3. The sensor 6 is preferably integrated with the radial magnetic levitation bearing 32, and comprises a radial measuring coil 61, an axial measuring coil 62, a coil core 63, a circuit board 64, and a core 65 to be measured. The core 65 is disposed on the outer ring of the rotating bushing 2. The sensor 6 can measure radial (X, Y) and axial (Z) positions, and output radial and axial position signals.

[0054] In one embodiment, a base 8 is also included, which is fixedly connected to the stator of the radial magnetic bearing 32 located below. The base 8 is used to support the entire wind power generation equipment, and it is fixedly connected to the fixed shaft 1 through the stator of the radial magnetic bearing 32.

[0055] The above description is merely an embodiment and does not constitute any limitation on the present invention. Any person skilled in the art can make many possible variations, modifications, or alterations to the technical solutions of the present invention without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A small wind power generation device, characterized by, It includes a fixed shaft (1), a rotating bushing (2), a magnetic levitation bearing assembly (3), a blade assembly (4), and a generator (5); The rotating bushing (2) is coaxially rotatably mounted on the fixed shaft (1); The magnetic levitation bearing assembly (3) is used for contactless rotatable connection between the fixed shaft (1) and the rotating bushing (2), including an axial magnetic levitation bearing (31) and two radial magnetic levitation bearings (32) arranged axially along the fixed shaft (1). The stators of the axial magnetic levitation bearing (31) and the radial magnetic levitation bearings (32) are fixedly connected to the fixed shaft (1), and the rotors are fixedly connected to the rotating bushing (2). The blade assembly (4) includes an S-type wind turbine (41) and an H-type vertical blade (42) fixed on the rotating bushing (2), and the S-type wind turbine (41) and the H-type vertical blade (42) are arranged between two radial magnetic levitation bearings (32). The rotating component of the generator (5) is fixedly connected to the rotating bushing (2), and the fixed component is fixedly connected to the fixed shaft (1); An axial magnetic bearing (31), one radial magnetic bearing (32), a blade assembly (4), a generator (5) and another radial magnetic bearing (32) are arranged sequentially from the upper end to the lower end of the fixed shaft (1). The stators of the axial magnetic bearing (31) and the lower radial magnetic bearing (32) are fixedly connected to the fixed shaft (1). One rotating bushing (2) is provided at the upper end and one at the lower end of the fixed shaft (1). The two ends of the S-type wind turbine (41) are fixedly connected to the two rotating bushings (2) respectively. The S-type wind turbine (41) and the two rotating bushings (2) are connected as one unit. A permanent magnet bearing (7) is also provided between the two rotating bushings (2) on opposite sides and the fixed shaft (1); the permanent magnet bearing (7) is composed of a moving magnetic ring (71) and a stationary magnetic ring (72), wherein the moving magnetic ring (71) is fixed on the inner ring of the rotating bushing (2), and the stationary magnetic ring (72) is fixed on the fixed shaft (1). The magnetization direction is axial magnetization. When installing the permanent magnet bearing (7), the moving magnetic ring (71) and the stationary magnetic ring (72) of the radial permanent magnet bearing (7) are offset in the axial direction by a certain position. At this time, the permanent magnet bearing (7) can provide radial support force in the radial direction and axial support force in the axial direction. The rotor of the axial magnetic bearing (31) is provided with a thrust disk (315), and the stator of the axial magnetic bearing (31) is provided with a friction disk (316). The axial clearance of the axial magnetic bearing (31) is adjustable so that the thrust disk (315) and the friction disk (316) rub against each other for braking. It also includes a sensor (6) for detecting the axial and radial clearances of the magnetic levitation bearing assembly (3); the sensor (6) is integrated with the radial magnetic levitation bearing (32), that is, it consists of a radial measuring coil (61), an axial measuring coil (62), a coil core (63), a circuit board (64) and a core to be measured (65), the core to be measured (65) being set on the outer ring of the rotating bushing (2).

2. The compact breeze power generation device according to claim 1, wherein The rotating assembly of the generator (5) is fixedly connected with the rotating shaft sleeve (2) and the S-shaped wind wheel (41), and the S-shaped wind wheel (41), the rotating assembly of the generator (5) and the two rotating shaft sleeves (2) are connected as a whole.

3. The compact breeze power generation device according to claim 1, wherein The S-shaped wind wheel (41) is sequentially provided with two groups along the axial direction of the fixed shaft (1), and the blades of the two groups of S-shaped wind wheels (41) are different by 90°.

4. The compact breeze power generation device according to claim 1, wherein The H-shaped vertical blade (42) comprises a plurality of vertical blades (421) and two groups of supports (422) arranged at the two ends of the S-shaped wind wheel (41), each group of supports (422) is annularly arranged with a plurality of supports around the fixed shaft (1), one vertical blade (421) is connected through two groups of corresponding supports (422), and the vertical blade (421) is parallel to the fixed shaft (1).

5. The compact breeze power generation device according to any one of claims 1 to 4, wherein Further comprising a base (8), and the base (8) is fixedly connected with the stator of the radial magnetic bearing (32) located below.

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