Permanent magnet synchronous wind power generator

Abstract

The application relates to a permanent magnet synchronous wind power generator, which comprises a stator assembly and a rotor assembly, the stator assembly comprises a stator support, a stator core and a winding, the rotor assembly comprises a rotor support, a magnetic steel and a rotor end cover plate, the stator support comprises an impeller side flange, a middle partition plate is fixedly welded in the impeller side flange, a middle flange is fixed to the center position of one side of the middle partition plate, fan mounting bases are symmetrically arranged on the middle partition plates at the two ends of the middle flange, a plurality of air deflectors are arranged on the other side of the middle partition plate, and a first rib plate and a second rib plate are arranged at the two ends of the air deflector respectively. The device integrates ventilation cooling, locking devices and end plate structures on the basis of a normal stator support structure, so as to meet the design requirements of simplification, integration and modularization.

Description

Technical Field

[0001] This invention belongs to the field of wind turbine technology and relates to a permanent magnet synchronous wind turbine. Background Technology

[0002] With the increasing maturity of wind turbine technology, simplification, integration, and modularization have become top priorities in the design of generator components. Adding integrated functions to the existing conventional stator support structure better meets the current design requirements of wind turbine components. In the current design, the axial distance between the cooling fan and the stator support tower-side flange is too tight, resulting in insufficient installation space. The locking device needs to withstand significant torque, and integration is poor, requiring the design and installation of numerous components. The cooling system is installed in the nacelle, occupying a large space. The radial cover plate is bolted to the stator support, as are the ventilation ducts and the impeller-side filter box. The core ends are end plate structures, bolted together, increasing operational difficulty and the risk of foreign objects falling in. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and propose a permanent magnet synchronous wind turbine generator that integrates ventilation and cooling, locking device and end plate structure on a conventional fixed-size bracket structure to achieve the design requirements of simplification, integration and modularization.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A permanent magnet synchronous wind turbine generator is characterized by comprising a stator assembly and a rotor assembly. The stator assembly includes a stator support, a stator core, and windings. The rotor assembly includes a rotor support, magnets, and rotor end caps. The stator support includes an impeller-side flange. A partition plate is fixedly welded inside the impeller-side flange. A middle flange is fixed at the center of one side of the partition plate. Wind turbine mounting bases are symmetrically arranged on the partition plates at both ends of the middle flange. Multiple wind guide plates are arranged on the other side of the partition plate. A first stiffener and a second stiffener are respectively arranged at both ends of the wind guide plate.

[0006] The air guide plate is welded to the middle partition plate, impeller side flange, first stiffener plate, and second stiffener plate to form a closed ventilation duct. It is integrated with the stator support. The impeller side flange is machined to form a concave platform to replace the stator core impeller side end plate, reducing the number of parts.

[0007] Impeller-side filter boxes are symmetrically welded and fixed at both ends of the inner side of the impeller-side flange. The impeller-side filter boxes are annular. A radial cover plate is provided between the impeller-side flange and the impeller-side filter box. The radial cover plate is integrated with the wind turbine stator support. The radial cover plate is welded to the middle partition plate, the column and the perimeter of the impeller-side flange, eliminating the need for bolt connections.

[0008] A radial filter box is provided above the radial cover plate, and a fan is provided on the fan mounting base. The fan operates in a ventilation mode. Under the negative pressure of the fan, the air enters the cavity formed by the stator and rotor through the radial filter box and the impeller side filter box, and then enters the air gap between the stator and rotor through the winding end. After that, it flows into the radial ventilation channel on the stator core, and then enters the cavity formed by the stator core and the stator support. Finally, it is drawn out by the fan and discharged into the atmosphere.

[0009] Furthermore, the outer circle of the middle flange is welded to two locking sleeve bases, the outer circle of the locking sleeve base is welded to the middle partition plate as a whole, and a locking bushing is fixed on the locking sleeve base.

[0010] Furthermore, the two locking sleeve bases are at a 150° angle.

[0011] Furthermore, the partition plate is conical.

[0012] Furthermore, the fan mounting base is fixed to the cooling fan by bolts.

[0013] Furthermore, multiple columns are evenly arranged at the connection between the outer periphery of the partition plate and the impeller-side flange.

[0014] Furthermore, multiple air guide plates are arranged around the middle partition.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] A permanent magnet synchronous wind turbine generator features a cooling fan directly mounted on the generator, eliminating piping resistance and improving cooling efficiency, thereby extending generator lifespan and reducing costs. The impeller-side air inlet employs a frame structure, increasing the air intake area for enhanced cooling efficiency and facilitating replacement and maintenance, thus saving on after-sales costs. The impeller-side air inlet uses an axial design to prevent rainwater from entering the generator, further extending its lifespan. The airflow path utilizes a welded integrated design, enhancing its sealing and reducing the number of cold-cooled components, thus lowering the failure rate of motor parts. The cooling fan outlet uses a grid-guided design to prevent rainwater from entering the fan, reducing the fan failure rate, extending its lifespan, and saving on after-sales costs.

[0017] The conventional stator support structure integrates ventilation and cooling, locking devices, and end plate structures to achieve the design requirements of simplification, integration, and modularization. This reduces the installation space of the cooling system, eliminates the bolt connection between the impeller side filter box and the stator support, and reduces the difficulty of operation and the risk of foreign objects falling.

[0018] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings are incorporated in and form part of this specification, and together with the description serve to explain the principles of the invention.

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a front view of a wind turbine stator support according to the present invention;

[0022] Figure 2 This is a rear view of a wind turbine stator support according to the present invention;

[0023] Figure 3 This is a cross-sectional view of a wind turbine generator according to the present invention;

[0024] Figure 4 for Figure 3 View A;

[0025] The components are: 1. Middle flange; 2. Middle partition plate; 3. Column; 4. Fan mounting base; 5. Locking sleeve base; 6. Locking shaft sleeve; 7. Impeller side flange; 8. Radial filter box; 9. Air guide plate; 10. First stiffener plate; 11. Second stiffener plate; 12. Impeller side filter box; 13. Fixed shaft; 14. Moving shaft; 15. Rotor end cover plate; 16. Radial cover plate; 17. Radial ventilation duct; 18. Stator core; 19. Rotor support; 20. Winding; 21. Magnet. Detailed Implementation

[0026] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses consistent with some aspects of the invention as detailed in the appended claims.

[0027] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] A wind turbine stator support includes an impeller-side flange 7. A conical diaphragm 2 is welded to the impeller-side flange 7. A central flange 1 is fixed at the center of one side of the central flange 2. Wind turbine mounting bases 4 are symmetrically arranged on the central flange 2 at both ends of the central flange 1. Multiple air guide plates 9 are arranged on the other side of the central flange 2. A first stiffener 10 and a second stiffener 11 are respectively arranged at both ends of the air guide plates 9. The air guide plates 9 are welded to the central flange 2, the impeller-side flange 7, the first stiffener 10, and the second stiffener 11 to form a closed ventilation channel. The stator support is an integrated design. The impeller-side flange 7 is machined to form a recessed platform, replacing the impeller-side end plate of the stator core 18, reducing the number of components.

[0029] Furthermore, the outer circle of the middle flange 1 is welded to two locking sleeve bases 5, and the outer circle of the locking sleeve base 5 is welded to the middle partition plate 2 as a whole, which increases the strength and meets the requirement of withstanding a large torque. A locking bushing 6 is fixed on the locking sleeve base 5, and the two locking sleeve bases 5 are at 150°. Two locking sleeve bases 5 are welded to the middle flange 1, and the locking bushing 6 is then welded to the locking sleeve base 5 as a whole, which ensures the strength of the stator support while being able to withstand a large torque.

[0030] Furthermore, impeller-side filter boxes 12 are symmetrically welded and fixed to both ends of the inner side of the impeller-side flange 7, forming an integral structure, eliminating the need for bolt connections. The impeller-side filter box 12 is annular, and a radial cover plate 16 is provided between the impeller-side flange 7 and the impeller-side filter box 12. The radial cover plate 16 is integrated with the wind turbine stator support. The radial cover plate 16 is welded to the central partition plate 2, the column 3, and the perimeter of the impeller-side flange 7, eliminating the need for bolt connections.

[0031] Furthermore, the fan mounting base 4 is fixed to the cooling fan by bolts. The cooling system is integrated with the stator support, and the stator support diaphragm adopts a tapered design to leave space for the installation of the cooling fan. Multiple columns 3 are evenly arranged at the connection between the outer periphery of the diaphragm 2 and the impeller side flange 7.

[0032] The cooling fan draws air in, and under the negative pressure of the fan, the air enters the cavity formed by the stator and rotor through the radial filter box 8 and the impeller-side filter box 12. It then enters the air gap between the stator and rotor through the winding ends, and enters the radial ventilation channel 17 on the stator core 18. From there, it enters the cavity formed by the stator core 18 and the stator support, and is finally drawn out by the cooling fan and discharged into the atmosphere. The airflow path adopts a welded integrated design, which enhances the airflow path sealing and reduces the number of cold-cooled components, thus lowering the failure rate of motor components. The cavity is constructed using a radial cover plate 16, a guide plate 9, the stator core 18, and the stator support. The generator is constructed with baffles, and the cooling fan is directly mounted on the generator, eliminating the need for piping resistance and improving cooling efficiency. This, in turn, extends the generator's lifespan and reduces its cost. The cooling fan exhaust outlet features a louvered windproof design to prevent rainwater from entering the generator. The impeller-side air inlet uses a frame structure, which increases the air intake area, improves cooling efficiency, and facilitates replacement and maintenance, saving on after-sales costs. The impeller-side air inlet structure employs an axial air intake design to prevent rainwater from entering the generator, thus extending its lifespan. The cooling fan outlet uses a grid guide plate design to prevent rainwater from entering the fan, reducing the fan failure rate, extending its lifespan, and saving on after-sales costs.

[0033] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention.

[0034] It should be understood that the present invention is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A permanent magnet synchronous wind turbine generator, characterized in that, The assembly includes a stator assembly and a rotor assembly. The stator assembly includes a stator support, a stator core (18), and a winding (20). The rotor assembly includes a rotor support (19), a magnet (21), and a rotor end cover plate (15). The stator support includes an impeller side flange (7). A middle partition plate (2) is fixedly welded inside the impeller side flange (7). A middle flange (1) is fixed at the center of one side of the middle partition plate (2). Fan mounting bases (4) are symmetrically arranged on the middle partition plates (2) at both ends of the middle flange (1). Multiple air guide plates (9) are arranged on the other side of the middle partition plate (2). A first stiffener plate (10) and a second stiffener plate (11) are respectively arranged at both ends of the air guide plate (9). The air guide plate (9) is welded to the middle partition plate (2), the impeller side flange (7), the first stiffener plate (10), and the second stiffener plate (11) respectively to form a closed ventilation channel. It is integrated with the stator support. The impeller side flange (7) is processed to form a concave platform to replace the impeller side end plate of the stator core (18) and reduce the design of parts. Impeller-side filter boxes (12) are symmetrically welded and fixed at both ends of the inner side of the impeller-side flange (7). The impeller-side filter boxes (12) are annular. A radial cover plate (16) is provided between the impeller-side flange (7) and the impeller-side filter box (12). The radial cover plate (16) is integrated with the wind turbine stator support. The radial cover plate (16) is welded to the middle partition plate (2), the column (3) and the impeller-side flange (7) around the perimeter, eliminating the need for bolt connections. A radial cover plate (16) is provided above the radial filter box (8). A fan is provided on the fan mounting base (4). The fan operates by exhaust. Under the negative pressure of the fan, the air enters the cavity formed by the stator and rotor along the radial filter box (8) and the impeller side filter box (12), and enters the air gap between the stator and rotor through the winding end. Then it flows into the radial ventilation channel (17) on the stator core (18), and then enters the cavity formed by the stator core (18) and the stator support. Finally, it is drawn out by the fan and discharged into the atmosphere.

2. A permanent magnet synchronous wind turbine generator according to claim 1, characterized in that, The outer circle of the middle flange (1) is welded to two locking sleeve bases (5), the outer circle of the locking sleeve base (5) is welded to the middle partition (2) as a whole, and a locking bushing (6) is fixed on the locking sleeve base (5).

3. A permanent magnet synchronous wind turbine generator according to claim 2, characterized in that, The two locking sleeve bases (5) are at 150°.

4. A permanent magnet synchronous wind turbine generator according to claim 1, characterized in that, The partition (2) is conical.

5. A permanent magnet synchronous wind turbine generator according to claim 1, characterized in that, The fan mounting base (4) is fixed to the cooling fan by bolts.

6. A permanent magnet synchronous wind turbine generator according to claim 1, characterized in that, Multiple columns (3) are evenly arranged at the connection between the outer periphery of the partition plate (2) and the impeller side flange (7).

7. A permanent magnet synchronous wind turbine generator according to claim 1, characterized in that, The air guide plate (9) is provided in multiple ways around the middle partition plate (2).

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