Double-rotor permanent magnet wind driven generator

Abstract

The invention discloses a double-rotor permanent magnet wind driven generator which comprises a generator base which comprises a base body and an outer rotor base. An outer rotor support, an outer rotor iron core, an outer stator, a magnetic shield, an inner stator and an inner rotor are sequentially arranged on the machine base body from the outermost circle to the innermost circle. The outer rotor iron core is arranged on the inner side of the outer rotor bracket; and the outer rotor permanent magnet is fixed on the outer rotor iron core through a limiting bolt. The inner rotor and the inner stator form the inner rotor generator, the outer rotor support, the outer rotor iron core and the outer stator form the outer rotor generator, the inner rotor generator and the outer rotor generator can independently operate to generate power, the power generation power of a single unit is greatly enhanced, and the power generation efficiency is improved; the blade mounting efficiency is greatly improved, and the assembly and transportation processes are simplified, so that the production and maintenance cost is reduced; the wind driven generator can be suitable for different wind speed conditions, the adaptability of the wind driven generator is improved, and the power generation efficiency and reliability are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of permanent magnet wind generators, in particular to a dual-rotor permanent magnet wind generator. Background Art

[0002] A wind turbine is a device that converts wind energy into electrical energy. Currently, single-motor wind turbines are commonly used. Its working principle is that the wind wheel rotates under the action of wind, converting the kinetic energy of the wind into mechanical energy, and then the generator converts the mechanical energy into electrical energy.

[0003] In the related art, with the advancement of technology, the single-unit power of wind turbine sets is getting larger and larger, so the diameter of the blades that need to be matched with the generator is getting larger and larger. If the diameter of the blades cannot be well matched with the high-power wind turbine, the power generation efficiency will be affected. However, the manufacturing, transportation, and assembly of large-diameter blades have brought great difficulties, resulting in high production and labor costs, and inconvenience for subsequent maintenance and replacement. Therefore, there is an urgent need for a dual-rotor permanent magnet wind turbine to reduce the diameter of the blades. By matching two sets of motors with one wind turbine, the wind power generation efficiency can be improved, thereby reducing the difficulties in blade manufacturing, transportation, and assembly. Summary of the invention

[0004] The object of the present invention is to provide a dual-rotor permanent magnet wind turbine generator to solve at least one aspect of the problems and defects raised in the above background technology.

[0005] Specifically, the present invention discloses a dual-rotor permanent magnet wind turbine generator, comprising:

[0006] A generator frame, the generator frame comprising a frame body and an outer rotor frame;

[0007] The base body is provided with an outer rotor bracket, an outer rotor core, an outer stator, a magnetic isolation sleeve, an inner stator and an inner rotor in sequence from the outermost circle to the innermost circle;

[0008] The outer rotor core is arranged inside the outer rotor bracket;

[0009] The outer rotor permanent magnet is fixed on the outer rotor core by means of limiting bolts.

[0010] The dual-rotor permanent magnet wind turbine according to the present invention has at least the following beneficial effects:

[0011] The dual-rotor permanent magnet wind turbine generator is composed of an inner rotor generator formed by an inner rotor and an inner stator, and an outer rotor generator formed by an outer rotor bracket, an outer rotor core, and an outer stator. Two sets of generators are arranged in a relatively compact base space, and the front and rear blades of the dual wind turbine unit can be installed respectively, so that under the drive of the front and rear blades, the inner rotor generator and the outer rotor generator can independently operate to generate electricity. The two sets of generators can control their different speeds, powers, and directions to operate independently without interfering with each other, which greatly enhances the power generation of a single unit, thereby improving the power generation efficiency;

[0012] At the same time, the wind turbine can effectively reduce the demand for blade diameter, reduce the difficulty of blade manufacturing, transportation, and assembly, greatly improve the efficiency of blade installation, and simplify the assembly and transportation process, thereby reducing production and maintenance costs;

[0013] In addition, the wind turbine structure can better balance the operation of the generator, improve operational stability, reduce vibration, thereby reducing noise and wear, and can be adapted to different wind speed conditions and can start quickly even at low wind speeds, thereby improving the adaptability of the wind turbine and making it suitable for working in different climates and environments, thereby improving power generation efficiency and reliability.

[0014] As a further solution of the present invention: the magnetic isolation sleeve is arranged as a cantilever structure and is connected to the base body, and the inner stator and the outer stator are respectively mounted on the inner and outer sides of the magnetic isolation sleeve.

[0015] Since the magnetic isolation sleeve is arranged as a cantilever structure and is connected to the base body, the inner stator and the outer stator are respectively installed on the inner and outer sides of the magnetic isolation sleeve. On the one hand, it is used to isolate the magnetic fields excited by the inner stator and the outer stator coils to avoid mutual interference between the magnetic fields of the inner stator and the outer stator; on the other hand, the cantilever structure of the magnetic isolation sleeve is fixed on the base body to support and fix the inner stator and the outer stator, reduce the vibration generated during the operation of the generator, effectively enhance the structural stability and reliability of the generator, ensure the normal operation of the generator, and thus ensure the power generation efficiency.

[0016] As a further solution of the present invention: the outer rotor support is a cylindrical structure, and both ends of the outer rotor support are supported on the base body by cantilever bearings.

[0017] Since the outer rotor bracket is a cylindrical structure, its two ends are supported on the base body by cantilever bearings, which can effectively support the outer rotor core and the outer rotor permanent magnet, ensure the stability of the generator during high-speed rotation, reduce vibration and noise, and the outer rotor bracket with a cylindrical structure is conducive to optimizing the spatial layout inside the base, making the arrangement of components such as the inner stator, outer stator and magnetic isolation sleeve more reasonable, thereby improving the overall space utilization of the base body.

[0018] As a further solution of the present invention: an outer rotor front bearing and an outer rotor rear bearing are arranged on the same side of the top of the outer rotor bracket, and the outer rotor front bearing and the outer rotor rear bearing are respectively connected to the outer rotor base.

[0019] Since the outer rotor front bearing and the outer rotor rear bearing are arranged on the same side of the top of the outer rotor bracket, the outer rotor front bearing and the outer rotor rear bearing are respectively connected to the outer rotor base, which can better support the rotation of the outer rotor, enhance its stability, reduce the vibration caused by the imbalance of the center of gravity during operation, disperse the axial load on the outer rotor, reduce stress concentration, and help improve the manufacturing and assembly efficiency, and facilitate later maintenance and replacement.

[0020] As a further solution of the present invention: an outer rotor front end cover is arranged on the top of the outer rotor front bearing, and an outer rotor rear end cover is arranged on the top of the outer rotor rear bearing.

[0021] By arranging an outer rotor front end cover on the top of the outer rotor front bearing and an outer rotor rear end cover on the top of the outer rotor rear bearing, the outer rotor front bearing and the outer rotor rear bearing can be effectively protected, dust can be prevented from entering the inner part of the outer rotor bearing, and the service life of the outer rotor bearing can be extended. In addition, the end cover can provide additional structural support for the outer rotor, increase the overall rigidity, reduce deformation caused by vibration during operation, and ensure the stability and reliability of the outer rotor operation.

[0022] As a further solution of the present invention: an inner rotor front bearing and an inner rotor rear bearing are respectively provided at both ends of the base body, and the inner rotor front bearing and the inner rotor rear bearing jointly support the inner rotor.

[0023] Since the inner rotor front bearing and the inner rotor rear bearing are respectively provided at both ends of the base body, the inner rotor front bearing and the inner rotor rear bearing jointly support the inner rotor, which can effectively improve the structural stability of the inner rotor, ensure that the inner rotor maintains good positioning and rotation accuracy during high-speed rotation and load changes, reduce vibration and noise, and improve the ability of the inner rotor to resist bending and twisting, so that the inner rotor can withstand additional lateral force and torque, ensuring the operating stability of the inner rotor.

[0024] As a further solution of the present invention: an inner rotor front end cover and an inner rotor rear end cover are respectively provided at both ends of the base body.

[0025] As a further solution of the present invention: the inner rotor front bearing is arranged on the inner rotor front end cover, and the inner rotor rear bearing is arranged on the inner rotor rear end cover.

[0026] Since the inner rotor front end cover and the inner rotor rear end cover are respectively provided at both ends of the base body; the inner rotor front bearing is arranged on the inner rotor front end cover, and the inner rotor rear bearing is arranged on the inner rotor rear end cover, the inner rotor front bearing and the inner rotor rear bearing can be effectively protected to prevent dust from entering the inner rotor bearing, thereby extending the service life of the inner rotor bearing, and the end cover can provide additional structural support for the inner rotor, increase the overall rigidity, reduce deformation caused by vibration during operation, and ensure the stability and reliability of the inner rotor operation.

[0027] As a further solution of the present invention: the rear end cover of the inner rotor is arranged on the inner side of the outer rotor bracket.

[0028] Since the rear end cover of the inner rotor is arranged on the inner side of the outer rotor bracket, it is helpful to dissipate the heat of the inner rotor, improve the cooling efficiency of the generator, avoid overheating, and can effectively reduce the external space occupied, enhance the structural compactness of the generator, make the overall design more concise, and facilitate installation and use in the limited space of the base body.

[0029] As a further solution of the present invention: the limiting bolt is made of non-magnetic material.

[0030] Since the limit bolts are made of non-magnetic material, magnetic interference between the outer rotor permanent magnet and the outer rotor core can be effectively avoided, thus preventing failures or erroneous data caused by magnetic field interference and ensuring the operating stability and safety of the generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0032] Figure 1 The figure is a schematic diagram of the structure of a dual-rotor permanent magnet wind turbine.

[0033] Reference numerals:

[0034] 1. Machine base; 2. Outer rotor bracket; 3. Outer rotor core; 4. Outer stator; 5. Magnetic isolation sleeve; 6. Inner stator; 7. Inner rotor; 8. Outer rotor permanent magnet; 9. Limit bolt; 10. Outer rotor front bearing; 11. Outer rotor rear bearing; 12. Outer rotor front cover; 13. Outer rotor rear cover; 14. Inner rotor front bearing; 15. Inner rotor rear bearing; 16. Inner rotor front cover; 17. Inner rotor rear cover; 18. Outer rotor machine base. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the technical solution of the present invention is further specifically described below by way of examples and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation of the present invention.

[0036] In addition, in the detailed description below, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the disclosed embodiments. However, it is apparent that one or more embodiments may be implemented without these specific details. In other cases, known structures and devices are embodied in a schematic manner to simplify the accompanying drawings.

[0037] like Figure 1 The embodiment of the present invention is a dual-rotor permanent magnet wind turbine, comprising: a generator base, the generator base comprising a base body 1 and an outer rotor base 18; the base body 1 is provided with an outer rotor support 2, an outer rotor core 3, an outer stator 4, a magnetic isolation sleeve 5, an inner stator 6 and an inner rotor 7 in sequence from the outermost circle to the innermost circle; the outer rotor core 3 is arranged on the inner side of the outer rotor support 2; the outer rotor permanent magnet 8, the outer rotor permanent magnet 8 is fixed to the outer rotor core 3 by a limit bolt 9.

[0038] Specifically, the dual-rotor permanent magnet wind turbine generator is composed of an inner rotor 7 and an inner stator 6 to form an inner rotor generator, and an outer rotor bracket 2, an outer rotor core 3, and an outer stator 4 to form an outer rotor generator. Two sets of generators are arranged in a relatively compact base space, and the front and rear blades of the dual wind turbine unit can be installed respectively, so that under the drive of the front and rear blades, the inner rotor generator and the outer rotor generator can be independently operated to generate electricity. The two sets of generators can control their different speeds, powers, and directions to operate independently without interfering with each other, which greatly enhances the power generation of a single unit, thereby improving the power generation efficiency;

[0039] At the same time, the dual-rotor generator can effectively reduce the demand for blade diameter, reduce the difficulty of blade manufacturing, transportation, and assembly, greatly improve the efficiency of blade installation, and simplify the assembly and transportation process, thereby reducing production and maintenance costs;

[0040] In addition, the dual-rotor permanent magnet wind turbine structure can better balance the operation of the generator, improve operational stability, reduce vibration, thereby reducing noise and wear, and can be adapted to different wind speed conditions and can start quickly even at low wind speeds, thereby improving the adaptability of the wind turbine and making it suitable for working in different climates and environments, thereby improving power generation efficiency and reliability.

[0041] Furthermore, the magnetic isolation sleeve 5 is configured as a cantilever structure and is connected to the base body 1 , and the inner stator 6 and the outer stator 4 are respectively mounted on the inner and outer sides of the magnetic isolation sleeve 5 .

[0042] Specifically, since the magnetic isolation sleeve 5 is configured as a cantilever structure and is connected to the base body 1, the inner stator 6 and the outer stator 4 are respectively installed on the inner and outer sides of the magnetic isolation sleeve 5. On the one hand, it is used to isolate the magnetic fields excited by the coils of the inner stator 6 and the outer stator 4 to avoid mutual interference between the magnetic fields of the inner stator 6 and the outer stator 4; on the other hand, the cantilever structure of the magnetic isolation sleeve 5 is fixed on the base body 1 to support and fix the inner stator 6 and the outer stator 4, thereby reducing the vibration generated during the operation of the generator, effectively enhancing the structural stability and reliability of the generator, ensuring the normal operation of the generator, and thus ensuring the power generation efficiency.

[0043] like Figure 1 As shown, the outer rotor support 2 is a cylindrical structure, and its two ends are supported on the base body 1 by cantilever bearings.

[0044] Specifically, since the outer rotor bracket 2 is a cylindrical structure, its two ends are supported on the base body 1 by cantilever bearings, which can effectively support the outer rotor core 3 and the outer rotor permanent magnet 8, ensure the stability of the generator during high-speed rotation, reduce vibration and noise, and the outer rotor bracket 2 with a cylindrical structure is conducive to optimizing the spatial layout inside the base, making the arrangement of components such as the inner stator 6, the outer stator 4 and the magnetic isolation sleeve 5 more reasonable, thereby improving the overall space utilization of the base body 1.

[0045] Furthermore, an outer rotor front bearing 10 and an outer rotor rear bearing 11 are provided on the same side of the top of the outer rotor bracket 2 , and the outer rotor front bearing 10 and the outer rotor rear bearing 11 are respectively connected to the outer rotor base 18 .

[0046] Specifically, since the outer rotor front bearing 10 and the outer rotor rear bearing 11 are arranged on the same side of the top of the outer rotor bracket 2, the outer rotor front bearing 10 and the outer rotor rear bearing 11 are respectively connected to the outer rotor base 18, which can better support the rotation of the outer rotor, enhance its stability, reduce the vibration caused by the imbalance of the center of gravity during operation, disperse the axial load on the outer rotor, reduce stress concentration, and help improve the manufacturing and assembly efficiency, and facilitate later maintenance and replacement.

[0047] Furthermore, an outer rotor front end cover 12 is arranged on the top of the outer rotor front bearing 10 , and an outer rotor rear end cover 13 is arranged on the top of the outer rotor rear bearing 11 .

[0048] Specifically, by arranging an outer rotor front end cover 12 on the top of the outer rotor front bearing 10 and an outer rotor rear end cover 13 on the top of the outer rotor rear bearing 11, the outer rotor front bearing 10 and the outer rotor rear bearing 11 can be effectively protected, dust can be prevented from entering the inner part of the outer rotor bearing, and the service life of the outer rotor bearing can be extended. In addition, the end cover can provide additional structural support for the outer rotor, increase the overall rigidity, reduce deformation caused by vibration during operation, and ensure the stability and reliability of the outer rotor operation.

[0049] like Figure 1 As shown, an inner rotor front bearing 14 and an inner rotor rear bearing 15 are respectively provided at both ends of the base body 1 , and the inner rotor front bearing 14 and the inner rotor rear bearing 15 support the inner rotor 7 .

[0050] Specifically, since the inner rotor front bearing 14 and the inner rotor rear bearing 15 are respectively provided at both ends of the base body 1, the inner rotor front bearing 14 and the inner rotor rear bearing 15 jointly support the inner rotor 7, which can effectively improve the structural stability of the inner rotor 7, ensure that the inner rotor 7 maintains good positioning and rotation accuracy during high-speed rotation and load changes, reduce vibration and noise, and improve the ability of the inner rotor 7 to resist bending and twisting, so that the inner rotor 7 can withstand additional lateral force and torque, ensuring the operating stability of the inner rotor 7.

[0051] Furthermore, an inner rotor front end cover 16 and an inner rotor rear end cover 17 are respectively provided at both ends of the base body 1 ; the inner rotor front bearing 14 is provided on the inner rotor front end cover 16 , and the inner rotor rear bearing 15 is provided on the inner rotor rear end cover 17 .

[0052] Specifically, since the inner rotor front end cover 16 and the inner rotor rear end cover 17 are respectively provided at both ends of the base body 1; the inner rotor front bearing 14 is provided on the inner rotor front end cover 16, and the inner rotor rear bearing 15 is provided on the inner rotor rear end cover 17, the inner rotor front bearing 14 and the inner rotor rear bearing 15 can be effectively protected, and dust can be prevented from entering the inner rotor bearing, thereby extending the service life of the inner rotor bearing. In addition, the end cover can provide additional structural support for the inner rotor 7, increase the overall rigidity, reduce deformation caused by vibration during operation, and ensure the stability and reliability of the operation of the inner rotor 7.

[0053] like Figure 1 As shown, the inner rotor rear end cover 17 is arranged on the inner side of the outer rotor support 2.

[0054] Specifically, since the rear end cover 17 of the inner rotor is arranged on the inner side of the outer rotor bracket 2, it helps to dissipate the heat of the inner rotor 7, improves the cooling efficiency of the generator, avoids overheating, and can effectively reduce the external space occupied, enhance the structural compactness of the generator, make the overall design more concise, and facilitate installation and use in the limited space of the base body 1.

[0055] According to an embodiment of the present invention, the limiting bolt 9 is made of a non-magnetic material.

[0056] Specifically, since the limit bolt 9 is made of non-magnetic material, it can effectively avoid magnetic interference between the outer rotor permanent magnet 8 and the outer rotor core 4, prevent failures or erroneous data caused by magnetic field interference, and ensure the operating stability and safety of the generator.

[0057] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual-rotor permanent magnet wind turbine, characterized in that: include: A generator base, the generator base comprising a base body (1) and an outer rotor base (18); The base body (1) is provided with an outer rotor support (2), an outer rotor core (3), an outer stator (4), a magnetic isolation sleeve (5), an inner stator (6) and an inner rotor (7) in sequence from the outermost circle to the innermost circle; The outer rotor iron core (3) is arranged on the inner side of the outer rotor bracket (2); An outer rotor permanent magnet (8), wherein the outer rotor permanent magnet (8) is fixed on the outer rotor iron core (3) via a limiting bolt (9).

2. The dual-rotor permanent magnet wind turbine according to claim 1, characterized in that: The magnetic isolation sleeve (5) is arranged as a cantilever structure and is connected to the machine base body (1); the inner stator (6) and the outer stator (4) are respectively mounted on the inner and outer sides of the magnetic isolation sleeve (5).

3. The dual-rotor permanent magnet wind turbine according to claim 1, characterized in that: The outer rotor support (2) is a cylindrical structure, and its two ends are supported on the machine base body (1) by cantilever bearings.

4. The dual-rotor permanent magnet wind power generator according to claim 3, characterized in that: An outer rotor front bearing (10) and an outer rotor rear bearing (11) are arranged on the same side of the top of the outer rotor bracket (2), and the outer rotor front bearing (10) and the outer rotor rear bearing (11) are respectively connected to the outer rotor base (18).

5. The dual-rotor permanent magnet wind power generator according to claim 4, characterized in that: An outer rotor front end cover (12) is arranged on the top of the outer rotor front bearing (10), and an outer rotor rear end cover (13) is arranged on the top of the outer rotor rear bearing (11).

6. The dual-rotor permanent magnet wind turbine according to claim 1, characterized in that: An inner rotor front bearing (14) and an inner rotor rear bearing (15) are respectively provided at both ends of the base body (1), and the inner rotor front bearing (14) and the inner rotor rear bearing (15) jointly support the inner rotor (7).

7. The dual-rotor permanent magnet wind power generator according to claim 6, characterized in that: An inner rotor front end cover (16) and an inner rotor rear end cover (17) are respectively provided at two ends of the machine base body (1).

8. The dual-rotor permanent magnet wind power generator according to claim 7, characterized in that: The inner rotor front bearing (14) is arranged on the inner rotor front end cover (16), and the inner rotor rear bearing (15) is arranged on the inner rotor rear end cover (17).

9. The dual-rotor permanent magnet wind power generator according to claim 8, characterized in that: The inner rotor rear end cover (17) is arranged on the inner side of the outer rotor support (2).

10. The dual-rotor permanent magnet wind power generator according to claim 1, characterized in that: The limiting bolt (9) is made of a non-magnetic material.

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