Novel magnetic suspension vertical axis wind turbine integrated with omnidirectional fan blades

Abstract

The utility model relates to the technical field of vertical axis wind driven generators, and discloses a novel magnetic suspension vertical axis wind driven generator integrated with omni-directional fan blades, the omni-directional fan blades are connected with a wind power rotor, wind energy in any direction is transmitted to the wind power rotor through the omni-directional fan blades, and the pneumatic design of the omni-directional fan blades can reduce the mass of the wind power rotor. The axial friction of the wind power rotor is reduced, so that the energy consumption is reduced, and the minimum working wind speed of the generator is reduced; the wind power rotor is supported by the radial bearing in the radial direction and is jointly supported by the axial thrust magnetic suspension bearing and the plane bearing in the axial direction, the axial thrust magnetic suspension bearing generates fixed suction force to counteract gravity, and therefore friction force on the plane bearing is reduced, and energy conversion efficiency is improved. A hot sleeve aluminum ring on the wind power rotor cuts magnetic induction lines of the axial magnetic suspension bearing to generate eddy current damping, so that overlarge axial vibration is inhibited; according to the utility model, stable axial suspension and higher power generation efficiency can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of vertical axis wind driven generators, more particularly to a novel magnetic suspension vertical axis wind driven generator integrated with omni-directional wind blades. BACKGROUND

[0002] Wind power generation as a renewable and environmentally friendly energy source is increasingly valued by countries around the world. In wind power generation, wind drives the wind blades to rotate to convert wind energy into mechanical energy, and then the mechanical energy is converted into electrical energy. According to the different directions of the wind blade rotation axis, wind driven generators are divided into horizontal axis type and vertical axis type. Compared with the horizontal axis type, the vertical axis type wind driven generator has the advantages of high efficiency and small size, and thus becomes the first choice for small and medium-sized micro wind power generation equipment.

[0003] The deficiencies of the prior art are that the existing vertical axis wind driven generator is composed of a wind blade, a transmission shaft, a speed changer and a generator in series, and in the process of energy conversion, mechanical transmission will generate friction, reducing the energy conversion efficiency. Therefore, a magnetic suspension method is used to reduce the friction of mechanical transmission, but due to the volume limitation, the magnetic suspension force in the generator is small, sometimes it is difficult to overcome the gravity to achieve the magnetic suspension effect, resulting in wear and tear during the wind power generation process. At the same time, the main limitation is that it needs to be located in an area with stable wind direction and high wind speed, because they cannot operate at low speed, and a braking system is needed to cope with high-speed wind, and an alignment system is also needed to make the blades perpendicular to the wind direction. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at the above problems and provides a novel magnetic suspension vertical axis wind driven generator integrated with omni-directional wind blades to reduce the transmission links and energy loss.

[0005] The utility model provides a novel magnetic suspension vertical shaft wind driven generator of integrated omni-directional wind blade, including generator casing, bearing casing, axial protection mechanism casing, wind power rotor, omni-directional wind blade, be equipped with generator rotor radial bearing and generator rotor in the generator casing, and generator rotor is connected with the generator casing through generator rotor radial bearing, be equipped with axial connection structure, wind power rotor radial bearing, plane bearing, wind power rotor thrust disc, wind power rotor hot jacketed aluminium ring and axial thrust magnetic suspension bearing in the bearing casing, the lower extreme of wind power rotor is provided with wind power rotor radial bearing, and the lower extreme of wind power rotor is connected with generator rotor through axial connection structure, the middle part of wind power rotor is sequentially provided with plane bearing, wind power rotor thrust disc, wind power rotor hot jacketed aluminium ring from below to above, and wind power rotor hot jacketed aluminium ring is located in axial thrust magnetic suspension bearing, be equipped with two radial rolling bearings in the axial protection mechanism casing, and axial protection mechanism casing is connected with wind power rotor through two radial rolling bearings, omni-directional wind blade sets up in the upper extreme of wind power rotor. Wind energy is passed to wind power rotor through omni-directional wind blade, and the aerodynamic design of omni-directional wind blade can reduce the quality of omni-directional wind blade, reduces the axial friction of wind power rotor, thereby reduces energy consumption, wind power rotor is supported in the radial by radial bearing, is supported in the axial by axial thrust magnetic suspension bearing and plane bearing jointly, and axial thrust magnetic suspension bearing generates fixed suction force to offset gravity, thereby reduces the friction on plane bearing, and further improves the efficiency of energy conversion, when axial vibration is too big, wind power rotor hot jacketed aluminium ring on wind power rotor cuts the magnetic induction line of axial thrust magnetic suspension bearing and generates eddy current damping, and the excessive axial vibration is inhibited, to prevent the impact on axial thrust magnetic suspension bearing caused by excessive axial load, two radial rolling bearings are arranged to provide radial support and axial protection, wind power rotor and generator rotor realize flexible connection through axial connection structure, thereby the rotating energy of wind power rotor is transmitted to generator rotor, and generator rotor rotates in disc type generator stator magnetic field and generates electric energy, realizes high -efficient power generation.

[0006] Further, the structure of the generator casing is disc type.

[0007] Further, the generator rotor is hollow structure.

[0008] Further, the plane bearing adopts the form of embedded roller.

[0009] Further, the axial thrust magnetic suspension bearing comprises a permanent magnet and a coil winding, the permanent magnet generates a fixed permanent magnetic attraction to the wind power rotor thrust disc, and the coil winding generates a fixed electromagnetic attraction to the wind power rotor thrust disc, which together balance the gravity. The permanent magnetic attraction balances most of the gravity, so as to reduce the number of turns and the current of the coil winding, thereby achieving the purpose of reducing the volume and power consumption of the axial magnetic suspension bearing. On the basis of the axial thrust magnetic suspension bearing, a plane bearing is arranged axially to support the wind power rotor, so as to ensure that the generator can still operate stably in a suspension instability state. When the aluminum ring of the wind power rotor hot jacket cuts the magnetic induction lines of the permanent magnet, the eddy current damping is generated, so as to achieve the non-contact rotor axial damping, and the damping does not introduce additional mechanical transmission friction, thereby ensuring the transmission efficiency of the system. Further, the single-sided axial air gap d between the radial rolling bearing and the wind power rotor is smaller than the single-sided air gap s between the axial thrust magnetic suspension bearing and the wind power rotor thrust disc, thereby achieving the protection of the axial thrust magnetic suspension bearing.

[0010] Further, the axial connection structure is an H-shaped structure, the side walls of the upper groove of the H-shaped structure are respectively provided with key grooves, the key grooves are provided with connecting pieces, and the wind power rotor is connected with the axial connection structure through the connecting pieces.

[0011] Further, the height of the key groove is greater than the height of the connecting piece, and the two sides of the connecting piece are respectively connected with the wind power rotor and the axial connection structure through bolts.

[0012] Further, the omnidirectional fan blade comprises an equilateral tetrahedral support, two pairs of blade A and blade B, the blade A is composed of a plurality of channels, the inlet area of each channel is greater than the outlet area, and the structure of the blade B is mirror-symmetrically arranged with the structure of the blade A.

[0013] Further, the channel is a curved surface, and the channels of the two blade A and the two blade B form a geometric body rotating around a single axis, and the direction of each surface makes the channel push the omnidirectional fan blade to move in a predetermined rotation direction.

[0014] Through the sequential arrangement of the blade A and the blade B, pressure difference can be generated on the omnidirectional fan blade by wind in any direction, and the omnidirectional fan blade can adapt to any wind direction.

[0015] The utility model discloses a beneficial effect lies in: omni -directional fan blade converts the rotation movement around single axle to fluid's thrust from any direction in vertical, horizontal or diagonal plane, can further reduce fan blade weight, promote wind energy conversion efficiency, rotor adopts axial magnetic suspension structure and eddy current damping vibration reduction structure, and there is no contact friction between rotor and stator, reduces friction resistance, energy loss and speed loss, makes power generation device can realize low wind speed start, and energy conversion efficiency is higher. Axial protection mechanism can guarantee that the core component of wind driven generator is stable in the operation process. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is whole structure schematic diagram of novel magnetic suspension vertical shaft wind driven generator in the utility model.

[0017] Figure 2 It is internal section structure schematic diagram of novel magnetic suspension vertical shaft wind driven generator in the utility model.

[0018] Figure 3 It is structure schematic diagram of axial thrust magnetic suspension bearing in the utility model.

[0019] Figure 4 It is structure schematic diagram of radial rolling bearing in the utility model.

[0020] Figure 5 It is structure schematic diagram of axial connection structure in the utility model.

[0021] Figure 6 It is structure schematic diagram of omni -directional fan blade in the utility model.

[0022] Figure 7 It is structure schematic diagram of blade A in the utility model.

[0023] In the drawing, 1, generator casing;2, bearing casing;3, axial protection mechanism casing;4, wind power rotor;5, omni -directional fan blade;6, generator rotor radial bearing;7, generator rotor;8, axial connection structure;9, wind power rotor radial bearing;10, plane bearing;11, wind power rotor thrust disc;12, wind power rotor hot-jacketed aluminum ring;13, axial thrust magnetic suspension bearing;14, radial rolling bearing;15, permanent magnet;16, coil winding;17, connecting piece;18, blade A;19, tetrahedron support;20, blade B. DETAILED DESCRIPTION

[0024] The specific implementation of the utility model is described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but are not used to limit the scope of the utility model.

[0025] REFERENCE Figure 1 AND Figure 2The utility model provides a novel magnetic suspension vertical axis wind turbine of integrated omni directional wind blade, including generator casing 1, bearing casing 2, axial protection mechanism casing 3, wind power rotor 4, omni directional wind blade 5 and other components. The connecting mode and function of each component are as follows:

[0026] The connection of omni directional wind blade 5 and wind power rotor 4: omni directional wind blade 5 is connected to the upper end of wind power rotor 4 through high-strength fixed shaft, and wind energy is transmitted to wind power rotor 4. Omni directional wind blade 5 is made of lightweight composite material, and its aerodynamic design significantly reduces blade mass and axial friction by optimizing blade surface and channel structure, thereby reducing energy loss. The channel design of the blade is based on Bernoulli's principle, and pressure difference is generated through the area ratio of the inlet and outlet to realize high-efficiency thrust conversion under light wind conditions.

[0027] Disc generator structure: generator casing 1 is a disc structure, which contains generator rotor radial bearing 6 and generator rotor 7. Generator rotor 7 is connected to generator casing 1 through generator rotor radial bearing 6. Generator rotor radial bearing 6 supports generator rotor 7 with high-precision rolling bearing, ensuring radial stability. The generator adopts the form of inner rotor and outer stator, and the hollow structure of generator rotor 7 reduces the weight of the rotor on the basis of ensuring structural strength, thereby reducing the inertia moment and improving the starting performance.

[0028] Bearing casing 2 contains axial connection structure 8, wind power rotor radial bearing 9, plane bearing 10 and axial thrust magnetic suspension bearing 13. The lower end of wind power rotor 4 is provided with wind power rotor radial bearing 9, and the lower end of wind power rotor 4 is connected to generator rotor 7 through axial connection structure 8. The middle part of wind power rotor 4 is sequentially provided with plane bearing 10, wind power rotor thrust disc 11 and wind power rotor hot-jacketed aluminum ring 12 from bottom to top, and wind power rotor hot-jacketed aluminum ring 12 is located in axial thrust magnetic suspension bearing 13. Plane bearing 10 adopts the form of embedded roller, further reducing the friction of axial support and improving the energy conversion efficiency. The axial seats of wind power rotor radial bearing 9, plane bearing 10 and axial thrust magnetic suspension bearing 13 are hot-mounted on bearing casing 2 through interference fit, ensuring stability and reliability under high load conditions. Wind power rotor thrust disc 11 is made of high-strength stainless steel material and is hot-mounted on wind power rotor 4 through interference fit, ensuring the reliability and durability of the connection. Wind power rotor hot-jacketed aluminum ring 12 is made of high-conductivity aluminum alloy material and is hot-mounted on wind power rotor 4 through interference fit, used for generating eddy current damping when the shaft vibrates.

[0029] Axial protection mechanism housing: the axial protection mechanism housing 3 contains two radial rolling bearings 14, which are connected to the wind power rotor 4 through the two radial rolling bearings 14 to provide radial support and axial protection for the wind power rotor 4. The axial seats of the two radial rolling bearings 14 are hot-mounted on the axial protection mechanism housing 3 by interference fit to ensure structural stability under extreme working conditions.

[0030] Support and power generation mechanism: the wind power rotor 4 is supported radially by the wind power rotor radial bearing 9 and axially by the axial thrust magnetic suspension bearing 13 and the plane bearing 10. The axial thrust magnetic suspension bearing 13 adopts a composite design of permanent magnets and electromagnetic coils, which balances the gravitational force of the rotor part by precisely controlling the balance between electromagnetic attraction and permanent magnet attraction, realizes non-contact support, and significantly reduces friction loss. The plane bearing 10 provides mechanical backup support when the magnetic suspension system fails or the load is too large, ensuring the reliability of the system. When the axial vibration is too large, the wind power rotor hot-jacketed aluminum ring 12 cuts the magnetic induction lines of the axial magnetic suspension bearing 13, generating eddy current damping to suppress excessive axial vibration and protect the system from mechanical impact. The axial connection structure 8 is an H-shaped structure, the side walls of the upper groove of the H-shaped structure are provided with key grooves, and the key grooves are provided with connecting pieces 17. The lower end of the wind power rotor 4 is installed into the upper groove of the H-shaped structure, and since the height of the key groove is greater than the height of the connecting piece 17, the wind power rotor 4 can be adjusted axially. After adjustment, the connecting piece 17 is pre-tightened by bolts to realize flexible connection between the wind power rotor 4 and the generator rotor 7, and the rotational energy of the wind power rotor 4 is transmitted to the generator rotor 7. The generator rotor 7 rotates in the magnetic field of the disc-type generator stator 1 to generate electric energy and realize efficient power generation.

[0031] Reference Figure 3 The axial thrust magnetic suspension bearing 13 contains permanent magnets 15 and coil windings 16. The permanent magnets 15 generate a fixed permanent magnetic attraction to the wind power rotor thrust disc 11, and the coil windings 16 generate an adjustable electromagnetic attraction by precisely controlling the current, and the two together balance the gravity. The single-sided air gap between the axial thrust magnetic suspension bearing 13 and the wind power rotor thrust disc 11 is s, which is dynamically adjusted by the magnetic suspension controller to ensure the stability of the system under different working conditions. The permanent magnetic attraction bears most of the gravity, thereby reducing the number of turns and current demand of the coil windings 16, and reducing the size and power consumption of the magnetic suspension bearing. When the wind power rotor 4 vibrates axially, the wind power rotor hot-jacketed aluminum ring 12 cuts the magnetic induction lines of the permanent magnets 15, generating eddy current damping to realize non-contact rotor axial damping, without introducing additional mechanical transmission friction, ensuring the transmission efficiency of the system.

[0032] Reference Figure 4The radial rolling bearing 14 installed in the axial protection mechanism shell 3 provides radial support and axial protection for the wind power rotor 4. The single-side axial air gap between the radial rolling bearing 14 and the wind power rotor 4 is d, and d is smaller than the single-side air gap s between the axial thrust magnetic suspension bearing 13 and the wind power rotor thrust disc 11, thereby providing mechanical backup protection when the magnetic suspension system fails or the load is too large, ensuring the safety and reliability of the device. The radial rolling bearing 14 is designed with high precision and can withstand large radial and axial loads, ensuring stability under extreme conditions.

[0033] Referring to Figure 5 The axial connection structure 8 is provided with a key groove. In the connection with the wind power rotor 4, the key groove allows the axial movement of the connecting piece 17, ensuring the stability of the wind power rotor 4; in the connection with the generator rotor 7, the connecting piece 17 is connected through high-precision bolt pre-tightening to realize friction fastening, ensuring the efficiency and reliability of energy transmission. The connecting piece 17 is made of high-strength alloy steel material and is subjected to precision machining and heat treatment, ensuring the connection strength and durability under high load conditions.

[0034] Referring to Figure 6 The omnidirectional wind blade 5 is designed to convert the thrust of fluid from any direction (vertical, horizontal or diagonal plane) into rotational motion around a single axis, and is particularly suitable for environments with unstable or multi-directional wind direction changes. The blade A 18 is based on channels, and the inlet of each channel is larger than the outlet, and the ratio can be varied. The blade B 20 is mirror-imaged with the blade A 18. When a breeze flows, the area difference between the inlet and the outlet generates a pressure difference, thereby generating a thrust from the inlet to the outlet. The channel is curved, and the length is designed according to fluid mechanics to maximize energy conversion efficiency. The inlet is exposed on one face of the device. The channels are grouped to form the faces of a geometric body, each face including one or more channels, forming one or more layers of channels. All the faces formed by the channels together form a geometric body that rotates around a single axis, and the orientation of each face is designed to make the channels push the device to move in a predetermined rotation direction. This design can effectively utilize horizontal, vertical and / or diagonal wind power, improve energy conversion efficiency, and reduce dependence on wind direction stability.

[0035] The above specific embodiments further illustrate the purpose, technical solutions and advantages of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A novel magnetic levitation vertical axis wind turbine integrated with omni-directional wind blades characterized in that, Including generator casing (1), bearing casing (2), axial protection mechanism casing (3), wind power rotor (4), all-directional wind blade (5), the generator casing (1) is equipped with generator rotor radial bearing (6) and generator rotor (7) inside, generator rotor (7) is connected with generator casing (1) through generator rotor radial bearing (6); The bearing casing (2) is equipped with axial connection structure (8), wind power rotor radial bearing (9), plane bearing (10), wind power rotor thrust disc (11), wind power rotor hot-jacketed aluminum ring (12) and axial thrust magnetic suspension bearing (13) inside;The lower end of the wind power rotor (4) is provided with a wind power rotor radial bearing (9), and the lower end of the wind power rotor (4) is connected with the generator rotor (7) through the axial connection structure (8), and the middle part of the wind power rotor (4) is sequentially provided with a plane bearing (10), a wind power rotor thrust disc (11) and a wind power rotor hot-jacketed aluminum ring (12) from bottom to top, and the wind power rotor hot-jacketed aluminum ring (12) is located in the axial thrust magnetic suspension bearing (13); The axial protection mechanism casing (3) is equipped with two radial rolling bearings (14), and the axial protection mechanism casing (3) is connected with the wind power rotor (4) through the two radial rolling bearings (14);The all-directional wind blade (5) is arranged on the upper end of the wind power rotor (4).

2. The novel magnetic levitation vertical axis wind turbine integrated with omni-directional wind blades as claimed in claim 1 wherein, The structure of the generator casing (1) is disc type.

3. The novel magnetic levitation vertical axis wind turbine integrated with omni directional wind blades as claimed in claim 1 wherein, The generator rotor (7) is a hollow structure.

4. The novel magnetic levitation vertical axis wind turbine integrated with omni directional wind blades as claimed in claim 1 wherein, The plane bearing (10) adopts an embedded roller form.

5. The novel magnetic levitation vertical axis wind turbine integrated with omni directional wind blades as claimed in claim 1, wherein, The axial thrust magnetic suspension bearing (13) includes a permanent magnet (15) and a coil winding (16), the permanent magnet (15) generates a fixed permanent magnetic attraction to the wind power rotor thrust disc (11), and the coil winding (16) generates a fixed electromagnetic attraction to the wind power rotor thrust disc (11), which together balance the gravity.

6. The novel magnetic levitation vertical axis wind turbine integrated with omni directional wind blades as claimed in claim 1, wherein, The single-side axial air gap d between the radial rolling bearing (14) and the wind power rotor (4) is smaller than the single-side air gap s between the thrust magnetic suspension bearing (13) and the wind power rotor thrust disc (11).

7. The novel magnetic levitation vertical axis wind turbine integrated with omni directional wind blades as claimed in claim 1, wherein, The axial connection structure (8) is an H-shaped structure, the sidewalls of the upper groove of the H-shaped structure are respectively provided with key grooves, the key grooves are provided with connecting pieces (17), and the wind power rotor (4) is connected with the axial connection structure (8) through the connecting pieces (17).

8. The novel magnetic levitation vertical axis wind turbine integrated with omni-directional wind blades as claimed in claim 7 wherein, The height of the key groove is greater than the height of the connecting piece (17), and the two sides of the connecting piece (17) are connected with the wind power rotor (4) and the axial connection structure (8) through bolts.

9. The novel magnetic levitation vertical axis wind turbine integrated with omni directional wind blades as claimed in claim 1, wherein, The all-directional wind blade (5) includes equilateral tetrahedron supports (19), two pairs of blade A (18) and blade B (20), the blade A (18) is composed of multiple channels, the inlet area of each channel is greater than the outlet area, and the structure of the blade B (20) is mirror-symmetrically arranged with the structure of the blade A (18).

10. The novel magnetic levitation vertical axis wind turbine integrated with omni directional wind blades as claimed in claim 9 wherein, The channel is a curved surface, and the channels of the two blade A (18) and the two blade B (20) form a geometric body rotating around a single axis, and the direction of each surface makes the channel push the all-directional wind blade (5) to move in a predetermined rotation direction.

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