An assembly structure and method of a semi-direct-drive wind turbine rotor

Abstract

The application belongs to the technical field of generators, and relates to an assembly structure of a rotor of a generator, in particular to an assembly structure and method of a semi-direct-drive wind power generator rotor. The application fixes the magnetic pole rings after stacking and pressing on the stop opening of the rotor support, thereby reducing the total mass of the rotor assembly; the magnetic pole rings are assembled by stacking and pressing, thereby simplifying the installation form of the magnetic pole structure; the structure of single 2-pole magnetic pole punching sheet, single 3-pole magnetic pole punching sheet and single 4-pole magnetic pole punching sheet is designed, thereby optimizing the magnetic pole punching sheet structure; the rotor radial ventilation groove is optimized, the radial ventilation groove is formed by arranging the gasket or the radial ventilation groove sheet between the magnetic pole rings to realize the ventilation of the magnetic pole rings; the gasket can be the magnetic steel temperature measuring gasket in addition to the common gasket, wherein the magnetic steel temperature measuring gasket effectively avoids the punching on the rotor magnetic pole punching sheet, thereby playing the role of protecting the rotor magnetic pole box.

Description

Technical Field

[0001] This invention belongs to the field of generator technology and relates to the assembly structure of generator rotors, specifically to an assembly structure and assembly method for a semi-direct drive wind turbine rotor. Background Technology

[0002] Wind energy, as an environmentally friendly and renewable clean energy source, is widely used. In recent years, wind turbines have developed rapidly, moving towards higher power ratings and more compact structures. They are also gradually eliminating the couplings of traditional generators, integrating the generator and gearbox, and sharing the gearbox shaft system, thus improving energy transmission efficiency. Faced with increasingly fierce market competition and cost pressures, it is necessary to continuously reduce product costs and optimize product structure design to meet market demands. Reducing manufacturing costs and assembly difficulty while ensuring rotor performance is an urgent problem to be solved.

[0003] In view of this, the present invention is hereby proposed. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an assembly structure and assembly method for a semi-direct drive wind turbine rotor, so as to reduce the manufacturing cost and assembly difficulty of the rotor.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] On one hand, the present invention provides an assembly structure for a semi-direct drive wind turbine rotor, including a hollow rotor support with a trapezoidal cross-section. The rotor support has a rotor shaft installed at its small end and a stop provided circumferentially at its large end. Several magnetic pole rings are stacked on the side of the stop near the small end. The magnetic pole rings include multiple layers of stacked magnetic pole lamination rings. Each magnetic pole lamination ring includes multiple magnetic pole laminations arranged circumferentially. Adjacent magnetic pole laminations in adjacent layers of magnetic pole lamination rings are staggered. Each magnetic pole lamination has at least two sets of magnetic steel holes for installing magnets. The magnetic steel holes on all layers of magnetic pole laminations are stacked axially to form a magnetic pole box of a specified thickness. Magnets are assembled inside the magnetic pole box.

[0007] Specifically, each layer of magnetic pole lamination rings is fixedly connected to the other by an adhesive coating.

[0008] Specifically, the magnetic pole lamination consists of two magnetic pole cross sections and has two sets of magnetic steel holes, with adjacent magnetic pole laminations in adjacent layers of magnetic pole lamination rings being misaligned / installed.

[0009] Specifically, the magnetic pole lamination is also provided with a plurality of uniformly distributed first through holes that facilitate the passage of long screws, and the plurality of through holes form a first through hole group along the circumference of the magnetic pole lamination ring.

[0010] The first through-hole groups of adjacent magnetic pole lamination rings correspond one-to-one; the multiple magnetic pole lamination rings are stacked to form a magnetic pole ring, and multiple sets of the first through-hole groups form screw hole groups along the axial direction; the screw hole groups of adjacent magnetic pole rings correspond one-to-one.

[0011] Specifically, after the magnetic pole rings are stacked, magnetic pole pressure rings are provided near or away from the stop for fixing the magnetic pole rings. The magnetic pole pressure rings are provided with a second set of through holes that correspond one-to-one with the screw hole set on the magnetic pole rings. The stop is provided with a third set of through holes in the circumferential direction and along the axial direction that matches the first set of through holes. The long screw passes through the second set of through holes, the screw hole set and the third set of through holes and then cooperates with the nut to fix the magnetic pole pressure rings, the multi-turn magnetic pole rings and the stop.

[0012] Specifically, multiple ventilation pads are provided between adjacent magnetic pole rings, and the pads are provided with positioning holes to facilitate the passage of long screws.

[0013] Specifically, the pad is a rectangular block arranged radially, and the side of the pad near the center of the magnetic pole ring has a groove for placing the magnetic steel temperature sensor.

[0014] Specifically, the magnetic pole rings are provided with several radial ventilation spacers for ventilation.

[0015] Specifically, radial ventilation slots are formed by radial ventilation spacers between adjacent magnetic pole rings.

[0016] On the other hand, the present invention provides an assembly method for the assembly structure of a semi-direct drive wind turbine rotor, as detailed below:

[0017] Assembly of the magnetic pole ring: First, magnetic pole laminations are evenly distributed in the circumferential direction to form the first layer of magnetic pole lamination rings. The above operation is repeated to prepare multiple layers of magnetic pole lamination rings. Then, adjacent magnetic pole laminations in adjacent layers of magnetic pole lamination rings are installed in a staggered manner. The magnet holes on all layers of magnetic pole laminations are stacked along the axial direction to form a magnetic pole box of a specified thickness. Multiple layers are stacked to the required thickness to form a magnetic pole ring. An adhesive coating is provided between each layer of magnetic pole lamination rings. After the magnetic pole ring is formed, the whole body is heated to cure the adhesive coating. Finally, the magnets are installed into the magnet box and sealed with glue to complete the assembly of one magnetic pole ring.

[0018] Magnetic pole ring stacking: Stack the assembled magnetic pole rings on the stop several times to the required height, and fix them to the stop;

[0019] Rotor assembly: Fix the rotor shaft to the rotor support; then place the assembled rotor in a magnetizer for uniformly magnetizing the N and S poles to complete the assembly of the semi-direct drive rotor.

[0020] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0021] 1) This invention significantly reduces the weight of the rotor assembly by eliminating the flange components, the rotor support yoke structure, the magnet pressure plate structure, the magnetic pole tie rod, and the radial magnetic pole tie rod fixing bolts, thus eliminating the existing technology. The magnetic pole rings are stacked and fixed as a whole on the stop of the rotor support, thereby reducing the total weight of the rotor assembly. This can reduce the load on the output shaft bearing at the high-speed end of the gearbox, thereby reducing the type of bearing used and indirectly reducing manufacturing costs.

[0022] 2) The magnetic pole rings are assembled by stacking, and the first layer of magnetic pole rings is assembled with the rotor support through the stop. After the assembly is completed, the whole structure is magnetized. This simplifies the installation of the magnetic pole structure because the magnets are not magnetic during assembly, which effectively improves the safety of workers.

[0023] 3) By designing structures such as single-sheet 2-pole lamination, single-sheet 3-pole lamination, and single-sheet 4-pole lamination, the structure of the lamination is optimized, which can effectively reduce the electrical losses of the generator rotor and improve the power generation efficiency.

[0024] 4) By adding radial ventilation slots to the rotor assembly, heat dissipation efficiency is improved, meeting the temperature rise requirements under higher heat load conditions and achieving cost reduction; the rotor radial ventilation slots are optimized by setting pads or radial ventilation slot plates between the magnetic pole rings to form radial ventilation slots to achieve ventilation of the magnetic pole rings; in addition to ordinary pads, magnetic steel temperature measuring pads can also be used. Among them, magnetic steel temperature measuring pads effectively avoid drilling holes in the rotor magnetic pole laminations, play a role in protecting the rotor magnetic pole box, save the PT100 magnetic steel temperature measuring device clamp, and avoid the risk of foreign objects falling on the rotating parts of the motor. Attached Figure Description

[0025] 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.

[0026] 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.

[0027] Figure 1 This is a schematic diagram of the assembly structure of the semi-direct drive wind turbine rotor of the present invention;

[0028] Figure 2 for Figure 1 A schematic diagram of the axial section;

[0029] Figure 3 for Figure 2 Schematic diagram of the M-direction section;

[0030] Figure 4 for Figure 2 magnified view Figure I Schematic diagram;

[0031] Figure 5 for Figure 2 magnified view Figure I Schematic diagram of radial ventilation duct;

[0032] Figure 6 A schematic diagram of the magnetic pole ring of the assembly structure of the semi-direct drive wind turbine rotor of the present invention;

[0033] Figure 7 for Figure 6 A schematic diagram of direction A;

[0034] Figure 8 A schematic diagram of the magnetic pole lamination ring of the assembly structure of the semi-direct drive wind turbine rotor of the present invention;

[0035] Figure 9 This is a schematic diagram of the two-pole magnetic laminations of the assembly structure of the semi-direct drive wind turbine rotor of the present invention;

[0036] Figure 10 A schematic diagram of the three-pole laminations of the assembly structure of the semi-direct drive wind turbine rotor of the present invention;

[0037] Figure 11 A schematic diagram of the four-pole laminations of the assembly structure of the semi-direct drive wind turbine rotor of the present invention;

[0038] Figure 12 This is a schematic diagram of the installation of the radial ventilation spacer bar in the assembly structure of the semi-direct drive wind turbine rotor of the present invention;

[0039] Figure 13 for Figure 12 Internal structure diagram;

[0040] Figure 14 This is a schematic diagram of the pad installation for the assembly structure of the semi-direct drive wind turbine rotor of the present invention;

[0041] Figure 15 This is a schematic diagram of the pad structure of the assembly structure of the semi-direct drive wind turbine rotor of the present invention;

[0042] Figure 16 for Figure 15 Side view;

[0043] Figure 17 This is a schematic diagram of the temperature measuring pad structure of the assembly structure of the semi-direct drive wind turbine rotor of the present invention.

[0044] Figure 18 for Figure 17 magnified view Figure II A schematic diagram of the structure;

[0045] Figure 19 for Figure 17 A schematic diagram of the N-axis structure;

[0046] Figure 20 This is a schematic diagram of the temperature measuring pad with a magnetic steel temperature measuring device installed in the assembly structure of the semi-direct drive wind turbine rotor of the present invention.

[0047] Wherein: 1 is rotor support; 2 is magnetic pole ring; 21 is magnetic pole lamination ring; 211 is magnetic pole lamination; 3 is magnetic pole pressure ring; 4 is long screw; 5 is magnetic pole box; 51 is magnetic steel hole; 6 is magnet; 7 is pad; 71 is plate tooth; 8 is magnetic steel temperature sensor; 9 is radial ventilation groove; 10 is radial ventilation spacer. Detailed Implementation

[0048] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples consistent with some aspects of the invention as detailed in the appended claims.

[0049] 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.

[0050] Example 1

[0051] This embodiment provides an assembly structure for a semi-direct-drive wind turbine rotor, including a hollow rotor support 1 with a trapezoidal cross-section. A rotor shaft is mounted at the small end of the rotor support, and a circumferential stop is provided at the large end. Several magnetic pole rings 2 are stacked on the side of the stop near the small end. Each magnetic pole ring 2 includes multiple stacked magnetic pole lamination rings 21, each including multiple magnetic pole laminations 211 arranged circumferentially. Adjacent magnetic pole laminations 211 in adjacent layers of magnetic pole lamination rings 21 are staggered. Each magnetic pole lamination 211 has at least two sets of magnet holes 51 for mounting magnets. The magnet holes 51 on all layers of magnetic pole laminations 211 are stacked axially to form a magnetic pole box 5 of a specified thickness. Magnets are assembled inside the magnetic pole box 5. (See also...) Figure 1 As shown.

[0052] Specifically, each layer of magnetic pole rings 21 is fixedly connected to the other by an adhesive coating.

[0053] Specifically, the magnetic pole piece 211 is composed of two magnetic pole cross sections and has two sets of magnet holes 51. Adjacent magnetic pole pieces 211 in adjacent magnetic pole piece rings 21 are installed with a 1 / 2 offset. See [reference needed] Figure 7 As shown.

[0054] Specifically, the magnetic pole lamination 211 is further provided with a plurality of uniformly distributed first through holes that facilitate the passage of the long screw 4. The plurality of through holes form a first through hole group along the circumference of the magnetic pole lamination ring 21. See [reference needed] Figure 8 As shown;

[0055] The first through-hole groups of adjacent magnetic pole lamination rings 21 correspond one-to-one; the multiple layers of magnetic pole lamination rings 21 are stacked to form a magnetic pole ring 2, and multiple sets of the first through-hole groups form screw hole groups along the axial direction; the screw hole groups of adjacent magnetic pole rings 2 correspond one-to-one, see [link to relevant documentation]. Figure 7 As shown.

[0056] Specifically, after the magnetic pole rings 2 are stacked, magnetic pole retaining rings 3 are provided near or away from the stop for fixing the magnetic pole rings. Each magnetic pole retaining ring 3 has a second set of through holes that correspond one-to-one with the screw hole sets on the magnetic pole rings 2. The stop has a third set of through holes circumferentially and axially that matches the first set of through holes. The long screw 4 passes through the second set of through holes, the screw hole set, and the third set of through holes, and then, with the help of a nut, fixes the magnetic pole retaining rings 3, the multi-turn magnetic pole rings 2, and the stop. (See [reference]). Figure 1-2 , Figure 3-4 As shown.

[0057] Specifically, multiple ventilation pads 7 are provided between adjacent magnetic pole rings 2. Each pad 7 has positioning holes to facilitate the passage of a long screw 4. (See [reference]). Figure 14-15 As shown.

[0058] Specifically, the pad 7 is a radially arranged rectangular block, and the side of the pad 7 near the center of the magnetic pole ring 2 has a groove for placing the magnetic steel thermometer 8, see [link to relevant documentation]. Figure 17 , 20 As shown.

[0059] Specifically, the magnetic pole rings 2 are provided with several radial ventilation spacers 10 for ventilation, see [link to relevant documentation]. Figure 12-13 As shown.

[0060] Specifically, radial ventilation spacers 10 are provided between adjacent magnetic pole rings 2 to form radial ventilation slots 9, see [reference]. Figure 12 As shown.

[0061] Example 2

[0062] Based on Example 1, this example provides an assembly method for the assembly structure of a semi-direct drive wind turbine rotor, as detailed below:

[0063] Assembly of the magnetic pole ring: Using a single 1mm thick two-pole magnetic pole piece 211, firstly, 10 pieces of the two-pole magnetic pole piece 211 are evenly distributed in the circumferential direction to form a first layer of magnetic pole piece ring with a thickness of 1mm. The above operation is repeated to prepare multiple layers of magnetic pole piece rings 21. Then, adjacent magnetic pole pieces 211 in adjacent layers of magnetic pole piece rings 21 are installed in a staggered manner. The magnet holes 51 on all layers of magnetic pole piece rings 211 are stacked in the axial direction to form a 50mm thick magnetic pole box 5. After stacking 50 layers, a magnetic pole ring 2 with a thickness of 50mm is formed. An adhesive coating is provided between each layer of magnetic pole piece ring 21. After the magnetic pole ring 2 is formed, it is heated to 180℃~210℃ to cure the adhesive coating and form it in one step. Finally, the magnet is installed into the magnet box 5 and sealed with Huitian glue 7326 to complete the assembly of one circle of magnetic pole ring 2.

[0064] Magnetic pole ring 2 stacking: After stacking the assembled magnetic pole ring 2 on the stop 10 times, it is then passed through the magnetic pole pressure ring 3, magnetic pole ring 2, stop , and mating nut in sequence by the long M16 screw 4 and fixed on the stop .

[0065] Rotor assembly: Fix the rotor shaft to the rotor support 1; then place the assembled rotor in a magnetizer for uniformly magnetizing the N and S poles to complete the assembly of the semi-direct drive rotor.

[0066] Example 3

[0067] Based on Embodiment 1, this embodiment also provides a rotor comprising a single three-pole magnetic pole lamination 211 or a single four-pole magnetic pole lamination 211; when the three-pole magnetic pole lamination 211 is used to assemble the magnetic pole ring 2, the magnetic pole lamination 211 is installed with a 1 / 3 offset from the axially adjacent magnetic pole lamination 211; when the four-pole magnetic pole lamination 211 is used to assemble the magnetic pole ring 2, the magnetic pole lamination 211 is installed with a 1 / 4 or 1 / 2 offset from the axially adjacent magnetic pole lamination 211, see [reference]. Figure 10-11 As shown.

[0068] Example 4

[0069] Based on Embodiment 1, this embodiment also provides a rotor with radial ventilation slots 9. Radial ventilation slots 9 are arranged between each layer of magnetic pole rings 2 to improve the motor's heat dissipation efficiency. Similarly, depending on the actual situation, a radial ventilation slot 9 can be added every two or three layers. See [link to relevant documentation]. Figure 5 As shown.

[0070] Example 5

[0071] Based on Embodiment 4, this embodiment also provides a rotor with radial ventilation spacers 10. Multiple radial ventilation spacers 10 are uniformly arranged between the magnetic pole rings 2, forming radial ventilation grooves 9 between the magnetic pole rings 2. The lengths of the multiple radial ventilation spacers 10 are adapted to the radial thickness of the magnetic pole rings 2. (See [reference]). Figure 12-13 As shown.

[0072] Example 6

[0073] Based on Embodiment 5, this embodiment also provides a rotor with a radial ventilation spacer 10, wherein the radial ventilation spacer 10 is welded to the magnetic pole lamination 211, and the first through hole on the magnetic pole lamination 211 is adapted to the screw hole during assembly; the radial ventilation spacer 10 can also be welded to a single magnetic pole lamination 211, or welded between two corresponding magnetic pole laminations 211.

[0074] Example 7

[0075] Based on Embodiment 4, this embodiment also provides a rotor with a pad 7. The side view of the pad 7 shows a T-shaped structure. The top of the T-shaped structure is used to limit the pad 7 so that it is locked in the inner circumference of the magnetic pole ring 2. The axial side of the bottom end of the T-shaped structure is used to support the magnetic pole box 5. See [reference needed]. Figure 14-16 As shown.

[0076] Example 8

[0077] Based on Embodiment 7, this embodiment also provides a rotor with a pad 7 containing a magnetic thermometer 8. The groove contains multiple plate-shaped teeth 71 for fixing the magnetic thermometer 8 (pt100). The plate-shaped teeth 71 are positioned away from the top of the T-shaped structure, and the angle between the tooth surface and the sidewall of the groove is 65 degrees. The tips of the plate-shaped teeth 71 are also rounded. (See [reference]). Figure 17-20 As shown.

[0078] 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.

[0079] 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. An assembly structure for a semi-direct-drive wind turbine rotor, characterized in that, The system includes a hollow rotor support (1) with a trapezoidal cross-section. The rotor shaft is installed at the small end of the rotor support, and a stop is provided on the circumference of the large end. Several magnetic pole rings (2) are stacked on the side of the stop near the small end. The magnetic pole rings (2) include multiple magnetic pole lamination rings (21) stacked in multiple layers. Each magnetic pole lamination ring (21) includes multiple magnetic pole laminations (211) arranged along the circumference. Adjacent magnetic pole laminations (211) in adjacent layers of magnetic pole lamination rings (21) are installed in a staggered manner. Each magnetic pole lamination (211) is provided with at least two sets of magnetic steel holes (51) for installing magnets. The magnetic steel holes (51) on all layers of magnetic pole laminations (211) are stacked in the axial direction to form a magnetic pole box (5) of a specified thickness. Magnets are assembled inside the magnetic pole box (5). The magnetic pole piece (211) is also provided with a plurality of uniformly distributed first through holes that facilitate the passage of the long screw (4). The plurality of through holes form a first through hole group along the circumference of the magnetic pole piece ring (21). The first through holes of adjacent magnetic pole lamination rings (21) are all one-to-one; the multiple magnetic pole lamination rings (21) are stacked to form a magnetic pole ring (2), and multiple sets of the first through holes form screw hole groups along the axial direction; the screw hole groups of adjacent magnetic pole rings (2) are all one-to-one. After the magnetic pole rings (2) are stacked, magnetic pole pressure rings (3) are provided near or away from the stop for fixing the magnetic pole rings. The magnetic pole pressure rings (3) are provided with a second through hole group that corresponds one-to-one with the screw hole group on the magnetic pole rings (2). The stop is provided with a third through hole group that matches the first through hole group in the circumferential and axial directions. The long screw (4) passes through the second through hole group, the screw hole group and the third through hole group and then cooperates with the nut to fix the magnetic pole pressure rings (3), the multi-turn magnetic pole rings (2) and the stop. Multiple ventilation pads (7) are provided between adjacent magnetic pole rings (2), and the pads (7) are provided with pad positioning holes to facilitate the passage of long screws (4).

2. The assembly structure of the semi-direct drive wind turbine rotor according to claim 1, characterized in that, Each layer of the magnetic pole stamp rings (21) is fixedly connected by an adhesive coating.

3. The assembly structure of the semi-direct drive wind turbine rotor according to claim 1, characterized in that, The magnetic pole piece (211) is composed of two magnetic pole sections and has two sets of magnetic steel holes (51). The adjacent magnetic pole pieces (211) in the adjacent layer magnetic pole piece ring (21) are installed with a 1 / 2 offset.

4. The assembly structure of the semi-direct drive wind turbine rotor according to claim 1, characterized in that, The pad (7) is a rectangular block arranged radially, and the side of the pad (7) near the center of the magnetic pole ring (2) is provided with a groove for placing the magnetic steel thermometer (8).

5. The assembly structure of the semi-direct drive wind turbine rotor according to any one of claims 1-4, characterized in that, Several radial ventilation spacers (10) are provided between the magnetic pole rings (2) for ventilation.

6. The assembly structure of the semi-direct drive wind turbine rotor according to claim 5, characterized in that, Radial ventilation slots (9) are formed by providing radial ventilation spacers (10) between adjacent magnetic pole rings (2).

7. An assembly method based on the assembly structure of the semi-direct drive wind turbine rotor according to any one of claims 1-4, characterized in that, Specifically as follows: Assembly of the magnetic pole ring: First, the magnetic pole pieces (211) are evenly distributed in the circumferential direction to form the first layer of magnetic pole piece ring. The above operation is repeated to prepare multiple layers of magnetic pole piece rings. Then, the adjacent magnetic pole pieces (211) in the adjacent layers of magnetic pole piece rings (21) are installed in a staggered manner. The magnet holes (51) on all layers of magnetic pole pieces (211) are stacked in the axial direction to form a magnetic pole box (5) of a specified thickness. Multiple layers are stacked to the required thickness to form a magnetic pole ring (2). An adhesive coating is provided between each layer of magnetic pole piece rings (21). After the magnetic pole ring (2) is formed, the whole is heated to cure the adhesive coating. Finally, the magnet is installed into the magnetic pole box (5) and sealed with glue to complete the assembly of one ring of magnetic pole ring (2). Magnetic pole ring (2) stacking: Stack the assembled magnetic pole ring (2) on the stop to the required height and fix it to the stop; Rotor assembly: The rotor shaft is fixedly connected to the rotor support (1); then the assembled rotor is placed in the magnetizer for uniformly magnetizing the N and S poles to complete the assembly of the semi-direct drive rotor.

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