Wind turbine

Abstract

The application discloses a wind power generator, which comprises a first rotating part, a second rotating part and a fixed part. The first rotating part is rotatably assembled in the fixed part. The second rotating part is rotatably sleeved outside the fixed part. The first rotating part and the second rotating part can rotate independently and coaxially. An inner rotor is arranged on the first rotating part. An outer rotor is arranged on the second rotating part. An inner stator and an outer stator are arranged on the fixed part. The inner stator is oppositely arranged with the inner rotor. The outer stator is oppositely arranged with the outer rotor. The fixed part has a first end and a second end. The outer diameter of the first rotating part gradually increases from the second end to the first end. The outer diameter of the fixed part gradually increases from the second end to the first end, so that part of the fixed part is inserted into the second rotating part. The wind power generator has the advantages of convenient maintenance.

Description

Technical Field

[0001] This invention relates to the field of power generation equipment technology, and more specifically, to a wind turbine generator. Background Technology

[0002] As wind turbine power increases and turbine rotor length grows, the manufacturing and operating conditions of components such as rotors and main bearings are approaching the limits of the materials used. New types of wind turbines with high wind energy utilization, such as tandem twin-rotor turbines, have become a research hotspot. To achieve the maximum overall wind energy utilization rate of twin-rotor turbines, the front and rear rotors need to achieve complete mechanical and electrical structural integration and efficient coordinated operation of their rotational speeds. However, the complex structure of twin-rotor turbines in related technologies makes inspection and maintenance difficult. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of the present invention propose a wind turbine generator.

[0005] According to an embodiment of the present invention, a wind turbine generator includes a first rotating part, a second rotating part, and a fixed part. The first rotating part is rotatably mounted inside the fixed part, and the second rotating part is rotatably sleeved on the outside of the fixed part. The first rotating part and the second rotating part can rotate independently on the same axis. The first rotating part is provided with an inner rotor, and the second rotating part is provided with an outer rotor. The fixed part is provided with an inner stator and an outer stator. The inner stator is arranged opposite to the inner rotor, and the outer stator is arranged opposite to the outer rotor. The fixed part has a first end and a second end. The outer diameter of the first rotating part gradually increases from the second end to the first end to facilitate the insertion of a portion of the first rotating part from the first end into the fixed part. The outer diameter of the fixed part gradually increases from the second end to the first end to facilitate the insertion of a portion of the fixed part into the second rotating part.

[0006] According to an embodiment of the present invention, a wind turbine generator is provided with a first rotating part and a second rotating part that rotate coaxially. The first rotating part is connected to a first blade, and the second rotating part is connected to a second blade. The first rotating part, together with an inner rotor, can be inserted into a fixed part so that the inner stator and the inner rotor are arranged opposite to each other. The second rotating part, together with an outer rotor, can be fitted onto the outer periphery of the fixed part so that the outer rotor and the outer stator are arranged opposite to each other. The outer diameter of the first rotating part gradually increases from the second end to the first end, and the outer diameter of the fixed part gradually increases from the second end to the first end, so as to facilitate the insertion of the first rotating part into the inner side of the fixed part and the fitting of the second rotating part onto the outer side of the fixed part, thereby facilitating the assembly and disassembly of the wind turbine generator according to the present invention. In addition, the first rotating part has an inner rotor, the second rotating part has an outer rotor, the fixed part has an inner stator arranged opposite to the inner rotor, and the fixed part also has an outer stator arranged corresponding to the outer rotor, forming a generator with two coaxial layers, which improves the power generation efficiency of the wind turbine generator according to the present invention and makes it easy to maintain.

[0007] In some embodiments, the second rotating part and the fixed part are cylindrical structures, the inner diameter of the second rotating part gradually increases from the second end to the first end to facilitate the insertion of a portion of the fixed part into the second rotating part, and the inner diameter of the fixed part gradually increases from the second end to the first end to facilitate the insertion of a portion of the first rotating part into the fixed part.

[0008] In some embodiments, the fixing part is provided with a magnetic shielding sleeve, which extends along the length direction of the fixing part to isolate the magnetic field inside and outside the fixing part.

[0009] In some embodiments, the fixing part includes a cylindrical part and an annular baffle, the annular baffle is disposed at the first end, the cylindrical part extends along the length direction of the fixing part, the magnetic shield is disposed between the inner stator and the outer stator, and the magnetic shield is disposed between the inner wall of the cylindrical part and the outer wall of the cylindrical part.

[0010] In some embodiments, the magnetic shielding sleeve is provided with a cooling channel, which is bent and extended within the magnetic shielding sleeve to allow a cooling medium to flow within the magnetic shielding sleeve.

[0011] In some embodiments, the fixing part includes a reduced diameter section, and a portion of the second rotating part is rotatably mounted on the outer periphery of the reduced diameter section via a bearing. The reduced diameter section is located at the second end, and the outer diameter of the reduced diameter section gradually decreases along the direction from the first end to the second end, so that the fixing part can be inserted into the second rotating part.

[0012] In some embodiments, the second rotating part includes a sleeve part, a first annular flange and a second annular flange, the outer rotor is disposed on the sleeve part, the first annular flange and the second annular flange are disposed on the side of the sleeve part near the second end, the first annular flange and the second annular flange are assembled on the outer peripheral side of the reduced diameter section, and the first annular flange and the second annular flange have a set interval along the length direction of the fixed part to support the sleeve part.

[0013] In some embodiments, the first rotating part includes a rotating shaft, the inner rotor is sleeved on the outer peripheral side of a portion of the rotating shaft, the rotating shaft includes an extension section, the extension section is disposed on the side of the first end opposite to the second end to facilitate connection between the first rotating part and the first impeller.

[0014] In some embodiments, the second rotating part includes a flange disposed on the side of the second end opposite to the first end, and the flange is connected to the sleeve portion to facilitate connection between the second rotating part and the second wind turbine.

[0015] In some embodiments, the inner side of the fixing part is provided with a third annular flange, the fixing part includes a first bearing, the first bearing is disposed on the inner edge of the third annular flange, and a second bearing is provided on the rotating shaft, the second bearing being adapted to connect between the rotating shaft and the inner edge of the annular baffle. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a wind turbine generator according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the fixing part of the wind turbine generator according to an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the first rotating part of a wind turbine generator according to an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the second rotating part of the wind turbine generator according to an embodiment of the present invention.

[0020] Figure label:

[0021] 1. First rotating part; 11. Inner rotor; 12. Rotating shaft; 121. Outer extension section; 13. Second bearing;

[0022] 2. Second rotating part; 21. Outer rotor; 22. Flange; 23. Sleeve part; 24. First annular flange; 25. Second annular flange;

[0023] 3. Fixed part; 31. Cylindrical part; 311. Annular groove; 32. Inner stator; 33. Outer stator; 34. Reduced diameter section; 35. Annular baffle; 36. Third annular flange; 37. First bearing. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] The following is combined with Figure 1 , Figure 2 , Figure 3 and Figure 4 This invention describes a wind turbine generator according to an embodiment of the present invention.

[0026] According to an embodiment of the present invention, the wind turbine includes a first rotating part 1, a second rotating part 2, and a fixed part 3. The first rotating part 1 is rotatably mounted inside the fixed part 3, and the second rotating part 2 is rotatably sleeved on the outside of the fixed part 3. The first rotating part 1 and the second rotating part 2 can rotate independently on the same axis.

[0027] Specifically, the fixing part 3 is a cylindrical structure extending front to back, and the front end of the fixing part 3 is provided with an opening. At least a portion of the first rotating part 1 can be inserted into the fixing part 3 from the front opening of the fixing part 3 and rotated into the fixing part 3. The second rotating part 2 is a cylindrical structure extending front to back, and the front end of the second rotating part 2 is provided with an opening. At least a portion of the fixing part 3 can be inserted into the second rotating part 2 from the front opening of the second rotating part 2 and rotatably fitted onto the outer periphery of the fixing part 3.

[0028] The first rotating part 1 is provided with an inner rotor 11, the second rotating part 2 is provided with an outer rotor 21, and the fixed part 3 is provided with an inner stator 32 and an outer stator 33. The inner stator 32 is arranged opposite to the inner rotor 11, and the outer stator 33 is arranged opposite to the outer rotor 21.

[0029] Specifically, the inner wall of the fixing part 3 is sleeved on the outer periphery of the inner stator 32, the outer wall of the fixing part 3 is sleeved on the outer stator 33, the outer periphery of the first rotating part 1 is sleeved on the inner rotor 11, and the inner wall of the second rotating part 2 is sleeved on the outer rotor 21. When the first rotating part 1, the second rotating part 2 and the fixing part 3 are engaged together, the inner rotor 11 and the inner stator 32 coincide in the front-back direction, and the outer rotor 21 and the outer stator 33 coincide in the front-back direction, so that the inner rotor 11 can be rotatably engaged on the inner side of the inner stator 32, and the outer rotor 21 can be rotatably sleeved on the outer periphery of the outer stator 33.

[0030] The fixing part 3 has a first end and a second end. The outer diameter of the first rotating part 1 gradually increases from the second end to the first end so as to allow a portion of the first rotating part 1 to be inserted into the fixing part 3 from the first end. The outer diameter of the fixing part 3 gradually increases from the second end to the first end so as to allow a portion of the fixing part 3 to be inserted into the second rotating part 2.

[0031] Specifically, the first end is the front end of the fixing part 3, and the second end is the rear end of the fixing part 3. The outer diameter of the fixing part 3 gradually decreases from front to back. When the second rotating part 2 is sleeved on the outer periphery of the fixing part 3, the rear end of the fixing part 3 first enters the inner cavity of the second rotating part 2 from the front end of the second rotating part 2. The outer diameter of the fixing part 3 gradually decreases from front to back, which on the one hand makes the outer periphery contour of the fixing part 3 adapt to the inner wall contour of the second rotating part 2, and on the other hand makes it easier to assemble the fixing part 3 into the second rotating part 2.

[0032] The outer diameter of the first rotating part 1 gradually decreases from front to back. When the first rotating part 1 is assembled into the inner cavity of the fixed part 3, the rear end of the first rotating part 1 first enters the inner cavity of the fixed part 3 from the front end of the fixed part 3. The gradual decrease in the outer diameter of the first rotating part 1 from front to back makes the outer periphery of the first rotating part 1 conform to the inner wall profile of the fixed part 3, and facilitates the assembly of the first rotating part 1 into the fixed part 3.

[0033] According to an embodiment of the present invention, the wind turbine generator is provided with a first rotating part 1 and a second rotating part 2 that rotate coaxially. The first rotating part 1 is connected to the first wind blade, and the second rotating part 2 is connected to the second wind blade. The first rotating part 1, together with the inner rotor 11, can be inserted into the fixed part 3 so that the inner stator 32 and the inner rotor 11 are arranged opposite to each other. The second rotating part 2, together with the outer rotor 21, can be fitted onto the outer periphery of the fixed part 3 so that the outer rotor 21 and the outer stator 33 are arranged opposite to each other. The outer diameter of the first rotating part 1 gradually increases from the second end to the first end, and the outer diameter of the fixed part 3 gradually increases from the second end to the first end, so as to facilitate the insertion of the first rotating part 1 into the inner side of the fixed part 3 and the fitting of the second rotating part 2 onto the outer side of the fixed part 3, thereby facilitating the assembly and disassembly of the wind turbine generator according to the embodiment of the present invention.

[0034] In addition, the first rotating part 1 is provided with an inner rotor 11, the second rotating part 2 is provided with an outer rotor 21, the fixed part 3 is provided with an inner stator 32 arranged opposite to the inner rotor 11, and the fixed part 3 is also provided with an outer stator 33 arranged corresponding to the outer rotor 21, forming a generator with two coaxial layers, which improves the power generation efficiency of the wind turbine generator in the embodiment of the present invention and makes the wind turbine generator in the embodiment of the present invention easy to maintain.

[0035] In some embodiments, the second rotating part 2 and the fixing part 3 are cylindrical structures. The inner diameter of the second rotating part 2 gradually increases from the second end to the first end to facilitate the insertion of a portion of the fixing part 3 into the second rotating part 2. The inner diameter of the fixing part 3 gradually increases from the second end to the first end to facilitate the insertion of a portion of the first rotating part 1 into the fixing part 3.

[0036] Specifically, the inner diameter of the inner wall of the fixing part 3 gradually increases from back to front, that is, the size of the opening at the front end of the inner cavity of the fixing part 3 is larger, so that the first rotating part 1 can be inserted into the fixing part 3 from the opening at the front end of the fixing part 3. The inner diameter of the inner wall of the second rotating part 2 gradually increases from back to front, that is, the size of the opening at the front end of the inner cavity of the second rotating part 2 is larger, so that the second rotating part 2 can be fitted onto the outer periphery of the fixing part 3 from back to front.

[0037] Therefore, the wind turbine generator of the present invention is easy to disassemble and assemble, and the wind turbine generator of the present invention has the advantage of being easy to maintain.

[0038] In some embodiments, the fixing part 3 is provided with a magnetic shielding sleeve, which extends along the length direction of the fixing part 3 to isolate the magnetic field inside and outside the fixing part 3.

[0039] Specifically, the inner stator 32 and the outer stator 33 are respectively provided with winding groups, and the inner rotor 11 and the outer rotor 21 are both made of permanent magnet material. When the wind turbine of this embodiment is working, the inner rotor 11 rotates relative to the inner stator 32, causing the winding group in the inner stator 32 to cut the magnetic field lines of the inner rotor 11 to generate current. The outer rotor 21 rotates relative to the outer stator 33, causing the winding group in the outer stator 33 to cut the magnetic field lines of the outer rotor 21 to generate current.

[0040] By providing a magnetic shielding sleeve in the fixing part 3, which is located between the outer stator 33 and the inner stator 32 in the front-rear direction, the magnetic field generated by the outer rotor 21 and the magnetic field generated by the inner rotor 11 are completely isolated to avoid mutual interference between the magnetic fields generated by the inner rotor 11 and the outer rotor 21. This allows the inner stator 32 to cut only the magnetic field lines of the inner rotor 11 and the outer stator 33 to cut only the magnetic field lines of the outer rotor 21, thereby achieving electrical decoupling between the inner rotor 11-inner stator 32 and the outer rotor 21-outer stator 33, and improving the power generation efficiency of the wind turbine in this embodiment of the invention.

[0041] In some embodiments, the fixing part 3 includes a cylindrical part 31 and an annular baffle 35. The annular baffle 35 is disposed at the first end. The cylindrical part 31 extends along the length direction of the fixing part 3. The magnetic shield is disposed between the inner stator 32 and the outer stator 33, and the magnetic shield is disposed between the inner wall of the cylindrical part 31 and the outer wall of the cylindrical part 31.

[0042] Specifically, an annular baffle 35 is located at the front end of the fixed part 3, and the thickness direction of the annular baffle 35 is the front-to-back direction. The annular baffle 35 extends in a closed manner around the outer periphery of the rotating shaft 12. The cylindrical part 31 is located at the rear end of the annular baffle 35, and the cylindrical part 31 extends in the front-to-back direction. The front end of the cylindrical part 31 is connected to the annular baffle 35, and the inner diameter of the front end of the cylindrical part 31 is larger than the inner diameter of the annular baffle 35, while the outer diameter of the front end of the cylindrical part 31 is smaller than the outer diameter of the annular baffle 35. This ensures that the inner rotor 11 and the inner stator 32 are completely located inside the cylindrical part 31 and behind the annular baffle 35, and the outer rotor 21 and the outer stator 33 are completely located outside the cylindrical part 31 and behind the annular baffle 35.

[0043] The cylindrical part 31 is a hollow structure. An annular groove 311 extending in the front-back direction is provided inside the cylindrical part 31. The annular groove 311 is located between the inner wall and the outer wall of the cylindrical part 31 and extends in a closed manner along the circumference of the cylindrical part 31 so that the magnetic shielding sleeve can be assembled into the annular groove 311.

[0044] Thus, the inner stator 32 is installed on the inner wall of the cylindrical part 31, and the outer stator 33 is installed on the outer wall of the cylindrical part 31, so that both the inner stator 32 and the outer stator 33 are located on the frame, and the inner stator 32 is connected to the magnetic shielding sleeve through the inner wall of the cylindrical part 31, and the outer stator 33 is connected to the magnetic shielding sleeve through the outer wall of the cylindrical part 31.

[0045] In some embodiments, a cooling channel (not shown in the figure) is provided inside the magnetic shielding sleeve, and the cooling channel bends and extends inside the magnetic shielding sleeve to allow the cooling medium to flow inside the magnetic shielding sleeve.

[0046] Specifically, during the operation of the power generation equipment in this embodiment of the invention, a magnetic shielding sleeve is provided between the outer stator 33 and the inner stator 32 to isolate the magnetic fields of the first component and the second component. The winding group in the outer stator 33 cuts the magnetic field lines of the outer rotor 21 to generate current. The current generates heat in the winding group of the outer stator 33 through the current heating effect. The winding group in the inner stator 32 cuts the magnetic field lines of the inner rotor 11 to generate current. The current generates heat in the winding group of the inner stator 32 through the current heating effect.

[0047] Therefore, the cooling medium flowing in the cooling channel inside the magnetic shielding sleeve can dissipate the heat generated in the inner stator 32 and outer stator 33, so as to avoid the heat accumulation in the inner stator 32 and outer stator 33 causing malfunctions.

[0048] In some embodiments, the fixing part 3 includes a reduced diameter section 34, and a portion of the second rotating part 2 is rotatably mounted on the outer periphery of the reduced diameter section 34 via a bearing. The reduced diameter section 34 is located at the second end, and the outer diameter of the reduced diameter section 34 gradually decreases in the direction from the first end to the second end, so that the fixing part 3 can be inserted into the second rotating part 2.

[0049] Specifically, the reduced diameter section 34 is located at the rear end of the fixed part 3, and the inner rotor 11, inner stator 32, outer rotor 21 and outer stator 33 are completely located in front of the reduced diameter section 34. The diameter of the reduced diameter section 34 is smaller than the diameter of the sleeve part 23, so that the structural rigidity of the reduced diameter section 34 is higher. The connection position between the second rotating part 2 and the fixed part 3 is located in the reduced diameter section 34, which can improve the support rigidity of the second rotating part 2, so that the outer rotor 21 has better coaxiality with the outer stator 33 when rotating relative to the outer stator 33.

[0050] In some embodiments, the second rotating part 2 includes a sleeve part 23, a first annular flange 24 and a second annular flange 25, an outer rotor 21 is disposed on the sleeve part 23, the first annular flange 24 and the second annular flange 25 are disposed on the side of the sleeve part 23 near the second end, the first annular flange 24 and the second annular flange 25 are fitted to the outer peripheral side of the reduced diameter section 34, and the first annular flange 24 and the second annular flange 25 have a set interval along the length direction of the fixing part 3 to support the sleeve part 23.

[0051] Specifically, the rear end of the second rotating part 2 is provided with a first annular flange 24 and a second annular flange 25. The first annular flange 24 is located on the front side of the second annular flange 25, and both the first annular flange 24 and the second annular flange 25 extend closed along the outer periphery of the fixed part 3. The inner edge of the first annular flange 24 and the outer wall of the reduced diameter section 34 are rotatably connected by a bearing, and the inner edge of the second annular flange 25 and the outer wall of the reduced diameter section 34 are rotatably connected by a bearing, so that the second rotating part 2 can be rotatably assembled to the fixed part 3.

[0052] Therefore, by setting the first annular flange 24 and the second annular flange 25, during the process of assembling the second rotating part 2 to the outer periphery of the fixed part 3, the inner edge of the first annular flange 24 and the inner edge of the second annular flange 25 serve as two support points to improve the support rigidity of the second rotating part 2, thereby further improving the coaxiality of the outer rotor 21 when rotating relative to the outer stator 33.

[0053] In some embodiments, the first rotating part 1 includes a rotating shaft 12, and an inner rotor 11 is sleeved on the outer periphery of a portion of the rotating shaft 12. The rotating shaft 12 includes an extension 121, which is located on the side of the first end away from the second end to facilitate connection between the first rotating part 1 and the first wind turbine.

[0054] The second rotating part 2 includes a flange 22, which is located on the side of the second end away from the first end, and the flange 22 is connected to the sleeve part 23 to facilitate the connection between the second rotating part 2 and the second wind turbine.

[0055] Specifically, the power generation equipment of this embodiment of the invention also includes a first wind turbine (not shown in the figure) and a second wind turbine (not shown in the figure) arranged coaxially. The front end of the rotating shaft 12 extends out of the fixing part 3 to connect the first wind turbine to the rotating shaft 12. The rotating shaft 12 drives the inner rotor 11 of the first rotating part 1 to rotate. The flange 22 is provided on the rear side of the fixing part 3 to connect the second wind turbine to the flange 22. The flange 22 drives the outer rotor 21 of the second rotating part 2 to rotate. Since the inner rotor 11 and the outer rotor 21 can rotate relative to each other, the rotating shaft 12 and the flange 22 can rotate coaxially and independently. Thus, the first wind turbine and the second wind turbine can rotate coaxially and relatively independently.

[0056] Thus, the mechanical decoupling of the first and second wind turbines is achieved through the coaxially rotating independent inner rotor 11 and outer rotor 21, thereby realizing independent control of the front and rear wind turbine speeds of the dual-wind turbine, which facilitates improving the total wind energy utilization rate of the wind turbine in this embodiment of the invention.

[0057] In some embodiments, a third annular flange 36 is provided on the inner side of the fixing part 3. The fixing part 3 includes a first bearing 37, which is disposed on the inner edge of the third annular flange 36. A second bearing 13 is provided on the rotating shaft 12, and the second bearing 13 is adapted to connect between the rotating shaft 12 and the inner edge of the annular baffle 35. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying 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.

[0059] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, 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.

[0060] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0061] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A wind turbine generator, characterized in that, include: The system comprises a first rotating part, a second rotating part, and a fixed part. The first rotating part is rotatably assembled inside the fixed part, and the second rotating part is rotatably sleeved on the outside of the fixed part. The first rotating part and the second rotating part can rotate independently on the same axis. The first rotating part is provided with an inner rotor, the second rotating part is provided with an outer rotor, and the fixed part is provided with an inner stator and an outer stator. The inner stator and the inner rotor are arranged opposite to each other, and the outer stator and the outer rotor are arranged opposite to each other. The fixing part has a first end and a second end. The outer diameter of the first rotating part gradually increases from the second end to the first end so as to allow a portion of the first rotating part to be inserted from the first end into the fixing part. The outer diameter of the fixing part gradually increases from the second end to the first end so as to allow a portion of the fixing part to be inserted into the second rotating part. The second rotating part includes a sleeve part, a first annular flange and a second annular flange. The outer rotor is disposed on the sleeve part. The first annular flange and the second annular flange are disposed on the side of the sleeve part near the second end. The first annular flange and the second annular flange are assembled on the outer peripheral side of the fixed part. The first annular flange and the second annular flange have a set interval along the length direction of the fixed part to support the sleeve part. The fixing part is provided with a magnetic shielding sleeve, which extends along the length of the fixing part to isolate the magnetic field inside and outside the fixing part. The magnetic shielding sleeve is provided with a cooling channel, which bends and extends within the magnetic shielding sleeve to facilitate the flow of cooling medium within the magnetic shielding sleeve. The fixing part includes a reduced diameter section, and a portion of the second rotating part is rotatably mounted on the outer periphery of the reduced diameter section via a bearing. The reduced diameter section is located at the second end, and the outer diameter of the reduced diameter section gradually decreases from the first end to the second end to facilitate the insertion of the fixing part into the second rotating part. The first annular flange and the second annular flange are mounted on the outer periphery of the reduced diameter section.

2. The wind turbine generator according to claim 1, characterized in that, The second rotating part and the fixed part are cylindrical structures. The inner diameter of the second rotating part gradually increases from the second end to the first end to facilitate the insertion of a portion of the fixed part into the second rotating part. The inner diameter of the fixed part gradually increases from the second end to the first end to facilitate the insertion of a portion of the first rotating part into the fixed part.

3. The wind turbine generator according to claim 1, characterized in that, The fixing part includes a cylindrical part and an annular baffle. The annular baffle is disposed at the first end. The cylindrical part extends along the length direction of the fixing part. The magnetic shield is disposed between the inner stator and the outer stator, and the magnetic shield is disposed between the inner wall of the cylindrical part and the outer wall of the cylindrical part.

4. The wind turbine generator according to claim 3, characterized in that, The first rotating part includes a rotating shaft, and the inner rotor is sleeved on the outer periphery of a portion of the rotating shaft. The rotating shaft includes an extension section, which is located on the side of the first end away from the second end to facilitate connection between the first rotating part and the first impeller.

5. The wind turbine generator according to claim 4, characterized in that, The second rotating part includes a flange, which is located on the side of the second end opposite to the first end, and the flange is connected to the sleeve part to facilitate connection between the second rotating part and the second wind turbine.

6. The wind turbine generator according to claim 4, characterized in that, The fixing part has a third annular flange on its inner side. The fixing part includes a first bearing, which is located on the inner edge of the third annular flange. The rotating shaft has a second bearing, which is adapted to connect between the rotating shaft and the inner edge of the annular baffle.

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