A magnetic pole structure of a semi-direct-drive wind turbine rotor and an assembling method thereof

Abstract

The application belongs to the technical field of wind driven generators, and relates to a rotor magnetic pole structure, in particular to a magnetic pole structure of a semi-direct drive wind driven generator rotor and an assembling method thereof. Through modular design of the rotor assembly, the same rotor accessory is adopted, different rotor assembly structures are formed through adjustment of the assembly form, and the rotor structure requirements of different generators are met. Through integral assembly of the rotor magnetic pole, the influence of the strong magnetic field on the body of the operator can be avoided, and the safety of the operator during the magnetic pole assembly is ensured. Through up and down angle dislocation installation of the magnetic pole ring, linear, inclined and V-shaped installation of the magnetic pole is realized, and the harmonic content of the motor is reduced. Through increase of the rotor radial ventilation, the magnetic pole heat dissipation efficiency is improved.

Description

Technical Field

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

[0002] Wind power generation, as one of the most technologically mature, rapidly developing, and commercially promising methods for the development and utilization of clean and renewable energy worldwide, has received widespread attention. The shortcomings of traditional direct-drive and doubly-fed wind turbines seriously hinder industry development. To more scientifically and rationally utilize natural resources to the greatest extent possible, improving the capacity and design and manufacturing technology of wind turbine units has become an urgent issue to be addressed. The semi-direct-drive technology route, as an integration of direct-drive and doubly-fed technologies, combines the advantages of both. The system uses a single or two-stage gearbox for speed increase, resulting in higher motor speeds and smaller size compared to direct-drive systems. It is currently the main technological direction for developing higher-power wind turbines. The rotor magnetic pole structure, as a crucial component of semi-direct-drive generators, directly affects the generator's cost and performance. However, current rotor magnetic poles all adopt an integral magnetic pole box structure, which is costly, has low operational reliability, is difficult to assemble, and poses safety hazards.

[0003] In view of this, a magnetic pole structure for a semi-direct drive wind turbine rotor is proposed to overcome the defects of the existing technology, reduce costs, and realize the function of arranging the rotor's magnetic poles in a straight line / oblique pole / V shape. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a magnetic pole structure for a semi-direct drive wind turbine rotor.

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

[0006] On the one hand, the present invention provides a magnetic pole structure for a semi-direct drive wind turbine rotor, including several magnetic pole rings stacked and fitted on a rotor support, and magnetic pole pressure rings for fixing the magnetic pole rings;

[0007] The magnetic pole ring includes multiple layers of stacked magnetic pole lamination rings. Each magnetic pole lamination ring includes multiple magnetic pole laminations arranged along the circumference. 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 mounting magnets. The magnetic steel holes on all layers of magnetic pole laminations are stacked along the axial direction to form a magnetic pole box of a specified thickness. Magnets are assembled inside the magnetic pole box.

[0008] Specifically, each layer of magnetic pole lamination rings is fixedly connected to the other by an adhesive coating.

[0009] Specifically, the magnetic pole punching sheet consists of two magnetic pole sections and is provided with two sets of magnetic steel holes, and adjacent magnetic pole punching sheets in adjacent layers of magnetic pole punching rings are installed in a staggered manner.

[0010] Specifically, the magnetic pole ring is in interference fit with the rotor support.

[0011] Specifically, the magnetic pole pressing ring is adapted to the rotor support, a plurality of threaded holes for facilitating fixing the magnetic pole pressing ring are evenly arranged at both ends of the rotor support, the fixed connection between the magnetic pole pressing ring and the rotor support is realized through bolts, and the compression and fixation of the magnetic pole ring is realized.

[0012] Specifically, a plurality of evenly distributed through holes are further arranged on the magnetic pole punching sheet, and the plurality of through holes form a through hole group along the circumference of the magnetic pole punching ring where they are located;

[0013] the through hole groups on the adjacent layers of magnetic pole punching rings are in one-to-one correspondence, a plurality of layers of the magnetic pole punching rings are laminated to form one circle of magnetic pole ring, and a plurality of groups of the through hole groups form an accommodation hole along the axial direction;

[0014] after a plurality of circles of magnetic pole rings are laminated, a plurality of spacing blocks for ventilation are placed in the accommodation holes between adjacent circles of magnetic pole rings; the spacing block is in an I-shaped revolving body structure, and both ends thereof respectively extend into the corresponding accommodation holes of the adjacent magnetic pole rings.

[0015] Specifically, the adjacent circles of the magnetic pole rings are installed in alignment or in a staggered manner at a specified angle, so as to realize the linear, oblique pole or V-shaped distribution of the magnetic poles in the axial direction.

[0016] In another aspect, the present invention provides an assembling method of a magnetic pole structure of a semi-direct drive wind turbine rotor, which is specifically as follows:

[0017] Assembly of magnetic pole ring: first, evenly distribute the magnetic pole punching sheets in the circumferential direction to form a first layer of magnetic pole punching ring, repeat the above operation to prepare a plurality of layers of magnetic pole punching rings respectively; then, install adjacent magnetic pole punching sheets in adjacent layers of magnetic pole punching rings in a staggered manner, the magnetic steel holes on all layers of magnetic pole punching sheets are laminated along the axial direction to form a magnetic pole box with a specified thickness, laminate a plurality of layers of magnetic pole punching rings to the required thickness to form a magnetic pole ring; an adhesive coating is arranged between each layer of magnetic pole punching rings, after the magnetic pole ring is formed, overall heating is performed to cure the adhesive coating; finally, install the magnetic steel into the magnetic steel box, seal it with glue, and complete the assembly of one circle of magnetic pole ring;

[0018] Lamination of magnetic pole rings: laminate the assembled magnetic pole rings for a plurality of circles to the required height, and when laminating, the magnetic poles in the magnetic pole rings can be installed in staggered manner in straight / oblique / V-shaped configuration according to actual use conditions;

[0019] Magnetic pole ring assembly: The stacked magnetic pole rings are fixed around the rotor support. At the same time, magnetic pole rings are set at both ends of the rotor support to fix the magnetic pole rings, thus completing the assembly of the semi-direct drive wind turbine rotor.

[0020] Specifically, the heating temperature of the magnetic pole ring is 180℃~210℃.

[0021] Specifically, the magnet and the magnet box are sealed with Huitian Adhesive 7326.

[0022] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0023] This invention achieves modular rotor assembly design, using the same rotor components and adjusting the assembly method to form rotor assembly structures with different structures, meeting the rotor structure requirements of different generators; by achieving integral assembly of rotor poles, the influence of strong magnetic fields on the operator's body can be avoided, and the operator's safety can be ensured during pole assembly; by installing the pole rings at staggered angles, straight, oblique, and V-shaped pole installations can be achieved, reducing the harmonic content of the motor; and by increasing rotor radial ventilation, the heat dissipation efficiency of the poles is improved. Attached Figure Description

[0024] 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.

[0025] 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.

[0026] Figure 1 This is a schematic diagram of the magnetic pole structure of the present invention;

[0027] Figure 2 for Figure 1 A schematic diagram of the cross-section;

[0028] Figure 3 This is a schematic diagram of the magnetic pole ring structure of the present invention;

[0029] Figure 4 for Figure 3 A partial schematic diagram of direction A;

[0030] Figure 5 This is a schematic diagram of the magnetic pole lamination ring of the present invention;

[0031] Figure 6 This is a schematic diagram of the magnetic pole piece of the present invention;

[0032] Figure 7 This is a schematic diagram of the linear arrangement of magnetic poles in this invention;

[0033] Figure 8 This is a schematic diagram of the skewed arrangement of the magnetic poles in this invention;

[0034] Figure 9 for Figure 8 A partial schematic diagram of direction B;

[0035] Figure 10 This is a schematic diagram of the V-shaped arrangement of the magnetic poles in this invention;

[0036] Figure 11 This is a schematic diagram of the magnetic pole pressure coil structure of the present invention;

[0037] Figure 12 for Figure 11 A schematic diagram of the H-direction section.

[0038] 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 bolt; 5 is magnet box; 51 is magnet hole; 6 is spacer block; 7 is radial ventilation channel. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] Example 1

[0042] This embodiment provides a magnetic pole structure for a semi-direct drive wind turbine rotor, including several magnetic pole rings 2 stacked and fitted on a rotor support 1, and magnetic pole retaining rings 3 for fixing the magnetic pole rings 2. See [link to documentation]. Figure 1-2 As shown;

[0043] The magnetic pole ring 2 includes multiple stacked magnetic pole lamination rings 21. Each magnetic pole lamination ring 21 includes 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 3-6 As shown;

[0044] Adjacent magnetic pole rings 2 are installed in alignment or offset at a specified angle to achieve a straight, oblique, or V-shaped distribution of magnetic poles in the axial direction. When the magnetic poles are obliquely or in a V-shape, the angle between the axial pole group and the axial direction in the magnetic pole structure is 0.5° to 1.5°. (See [reference needed]). Figure 7-8 , Figure 10 As shown.

[0045] Specifically, each layer of magnetic pole rings 21 is fixedly connected to the other by an adhesive coating.

[0046] 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 also...) Figure 4-6 As shown;

[0047] The magnetic pole piece 211 can also be composed of three magnetic pole sections and has three sets of magnet holes 51. The adjacent magnetic pole pieces 211 in the adjacent layer magnetic pole piece ring 21 are installed with a 1 / 3 offset.

[0048] The magnetic pole piece 211 can also be composed of four magnetic pole sections and has four 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 / 4 or 1 / 2 offset.

[0049] Specifically, the magnetic pole ring 2 is interference-fitted with the rotor support 1.

[0050] Specifically, the magnetic pole retaining ring 3 is adapted to the rotor support 1. The inner circle of the magnetic pole retaining ring 3 is provided with a positioning platform for limiting movement and adapted to the inner circle of the rotor support. Its outer circle is adapted to the structure of the magnetic pole ring 2. The rotor support 1 has multiple threaded holes evenly distributed at both ends for easy fixing of the magnetic pole retaining ring 3. The magnetic pole retaining ring 3 is fixedly connected to the rotor support 1 by bolts 4, and the magnetic pole ring 2 is pressed and fixed. (See [link to documentation]). Figure 1 , Figure 11-12 As shown.

[0051] Specifically, the magnetic pole piece 211 is also provided with a plurality of uniformly distributed through holes, and the plurality of through holes form a through hole group along the circumference of the magnetic pole piece ring 21.

[0052] The through-hole groups on adjacent layers of magnetic pole lamination rings 21 are all one-to-one corresponding. The multiple layers of magnetic pole lamination rings 21 are stacked to form a magnetic pole ring 2. The multiple sets of through-hole groups form a receiving hole along the axial direction. See [reference needed]. Figure 3 , Figure 5-6 , Figure 8 As shown;

[0053] After the multi-turn magnetic pole rings 2 are stacked, multiple spacer blocks 6 are placed in the receiving holes between adjacent magnetic pole rings 2 for ventilation.

[0054] Specifically, a plurality of spacing blocks 6 for ventilation may be provided every 2 or 3 or several layers of magnetic pole rings 2 according to actual conditions.

[0055] Specifically, the spacing block 6 is an "Shen"-shaped revolving body structure, and two ends thereof respectively extend into corresponding receiving holes of adjacent magnetic pole rings 2, see Figure 8 illustrated.

[0056] Example 2

[0057] Based on Example 1, this embodiment further provides an assembly method of a magnetic pole structure of a semi-direct drive wind generator rotor, which is specifically as follows:

[0058] Assembly of magnetic pole rings 2: First, evenly distribute magnetic pole laminations 211 in the circumferential direction to form a first layer of magnetic pole lamination ring, repeat the above operation to prepare multiple layers of magnetic pole lamination rings respectively; then, stagger adjacent magnetic pole laminations 211 in adjacent layers of magnetic pole lamination rings 21 for installation, so that the magnetic steel holes 51 on all layers of magnetic pole laminations 211 are laminated along the axial direction to form a magnetic pole box 5 with a specified thickness, and laminate multiple layers of magnetic pole lamination rings 21 to the required thickness to form a magnetic pole ring 2; an adhesive coating is arranged between each layer of magnetic pole lamination rings 21, after the magnetic pole ring 2 is formed, the whole is heated to 180°C to 210°C to cure the adhesive coating; finally, install the magnetic steel into the magnetic pole box 5 and seal it with Huitian Adhesive 7326, completing the assembly of one circle of magnetic pole ring 2;

[0059] Lamination of magnetic pole rings: heat the assembled magnetic pole ring 2 to a predetermined temperature, then laminate a number of circles to the required height, and when laminating, the magnetic poles in the magnetic pole rings 2 can be installed in a straight / skewed / V-shaped staggered arrangement according to actual use conditions, after adjusting the actual position, the interference assembly with the rotor support can be achieved after the magnetic pole rings are cooled;

[0060] Assembly of magnetic pole pressing rings: fix the laminated magnetic pole rings 2 on the circumference of the rotor support 1, and at the same time, arrange magnetic pole pressing rings 3 for fixing the magnetic pole rings 2 on both sides of the rotor support 1, thereby completing the assembly of the semi-direct drive wind generator rotor.

[0061] Example 3

[0062] Based on Example 2, this embodiment provides an assembly method of a magnetic pole structure of a semi-direct drive wind generator rotor, which is specifically as follows:

[0063] Assembly of Magnetic Pole Ring 2: First, two-pole magnetic pole pieces 211 with a thickness of 1mm are evenly distributed in the circumferential direction to form the first layer of magnetic pole piece rings; repeat the above operation to prepare 50 layers of magnetic pole piece rings respectively. Then, the adjacent magnetic pole pieces 211 in the adjacent layers of magnetic pole piece rings 21 are installed with a 1 / 2 offset. The magnet holes 51 on all layers of magnetic pole pieces 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 is formed; 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 180℃~210℃ to cure the adhesive coating; finally, the magnets are installed into the magnetic pole box 5 and sealed with Huitian Adhesive 7326 to complete the assembly of one circle of magnetic pole ring 2.

[0064] Magnetic pole ring stacking: After heating the assembled magnetic pole ring 2 to the predetermined temperature, stack 10 turns around the rotor support. The magnetic poles in the magnetic pole ring 2 can be installed in a straight / oblique / V-shaped staggered manner according to the actual use. After adjusting the actual position, the magnetic pole ring is pressed into the rotor support after cooling.

[0065] Magnetic pole ring assembly: After installing the magnetic pole ring 2, the magnetic pole ring 3 is fixedly connected to the rotor bracket 1 by bolts 4 and anti-loosening washers, and the magnetic pole ring 2 is pressed and fixed, thus completing the assembly of the semi-direct drive wind turbine rotor.

[0066] 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.

[0067] 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 magnetic pole structure for a semi-direct-drive wind turbine rotor, characterized in that, comprising a plurality of turns of pole rings stacked and sleeved on a rotor support (1), and a pole pressing ring (3) for fixing the pole rings (2); said pole ring (2) comprises a plurality of layers of laminated pole punch rings (21), said pole punch ring (21) comprises a plurality of pole punches (211) arranged along the circumference, and adjacent pole punches (211) in adjacent layers of pole punch rings (21) are installed in a staggered manner; each said pole punch (211) is provided with at least two groups of magnet steel holes (51) for installing magnet steels, the magnet steel holes (51) on the pole punches (211) of all layers are laminated along the axial direction to form a pole box (5) with a specified thickness, and a magnet steel is assembled in said pole box (5); said pole punch (211) is further provided with a plurality of uniformly distributed through holes, and said plurality of through holes form a through hole group along the circumference of the pole punch ring (21) where they are located; the through hole groups on adjacent layers of pole punch rings (21) are in one-to-one correspondence, a plurality of layers of said pole punch rings (21) are laminated to form one turn of pole ring (2), and a plurality of groups of said through hole groups form an accommodation hole along the axial direction; after a plurality of turns of pole rings (2) are laminated, a plurality of spacing blocks (6) for ventilation are placed in the accommodation holes between adjacent turns of pole rings (2); said spacing block (6) is of a I-shaped revolving body structure, and two ends thereof respectively extend into the accommodation holes corresponding to adjacent pole rings (2).

2. The magnetic pole structure of the semi-direct drive wind turbine rotor according to claim 1, characterized in that, each layer of said pole punch rings (21) is fixedly connected to each other through an adhesive coating.

3. The magnetic pole structure of the semi-direct drive wind turbine rotor according to claim 1, characterized in that, said pole punch (211) consists of two pole cross-sections and is provided with two groups of magnet steel holes (51), and adjacent pole punches (211) in adjacent layers of pole punch rings (21) are installed in a staggered manner by 1 / 2 pitch.

4. The magnetic pole structure of the semi-direct drive wind turbine rotor according to claim 1, characterized in that, said pole ring (2) is in interference fit with the rotor support (1).

5. The magnetic pole structure of the semi-direct drive wind turbine rotor according to claim 1, characterized in that, said pole pressing ring (3) is adapted to the rotor support (1), a plurality of threaded holes for facilitating fixing of the pole pressing ring (3) are uniformly provided at two ends of the rotor support (1), the fixed connection between the pole pressing ring (3) and the rotor support (1) is realized through bolts (4), and the compression and fixing of the pole ring (2) are realized thereby.

6. The magnetic pole structure of the semi-direct drive wind turbine rotor according to claim 1, characterized in that, adjacent turns of said pole rings (2) are installed in alignment or in a staggered manner at a specified angle, so as to realize linear, oblique pole or V-shaped distribution of magnetic poles in the axial direction.

7. A method for assembling the magnetic pole structure of the semi-direct drive wind turbine rotor according to any one of claims 1-6, characterized in that, the specific steps are as follows: Assembly of pole ring (2): firstly, uniformly arranging pole punches (211) in the circumferential direction to form a first layer of pole punch ring, repeating the above operation to prepare a plurality of layers of pole punch rings respectively; then, installing adjacent pole punches (211) in adjacent layers of pole punch rings (21) in a staggered manner, laminating the magnet steel holes (51) on the pole punches (211) of all layers along the axial direction to form a pole box (5) with a specified thickness, laminating a plurality of layers of pole punch rings (21) to a required thickness to form one pole ring (2); an adhesive coating is arranged between each layer of pole punch rings (21), after the pole ring (2) is formed, overall heating is performed to cure the adhesive coating; finally, installing a magnet steel into the magnet steel box (5) and sealing with glue, completing the assembly of one turn of pole ring (2); Lamination of pole rings (2): laminating the assembled pole rings (2) for a plurality of turns to a required height; Magnetic pole ring (3) assembly: The stacked magnetic pole ring (2) is fixed around the rotor support (1). At the same time, magnetic pole rings (3) are set at both ends of the rotor support (1) to fix the magnetic pole ring (2), thereby completing the assembly of the semi-direct drive wind turbine rotor.

8. The assembly method of the magnetic pole structure of the semi-direct drive wind turbine rotor according to claim 7, characterized in that, The heating temperature of the magnetic pole ring (2) is 180℃~210℃.

9. The assembly method of the magnetic pole structure of the semi-direct drive wind turbine rotor according to claim 7, characterized in that, The magnet and the magnet box (5) are sealed with Huitian Adhesive 7326.

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