Surface mounting tool and method for permanent magnet semi-direct drive wind power motor rotor magnetic pole

Abstract

The invention discloses a surface mounting tool and method for a permanent magnet semi-direct-drive wind power motor rotor magnetic pole, and belongs to the technical field of generator rotor magnetic pole assembly.The surface mounting tool comprises a supporting top plate, a driving screw, a guiding screw, a magnetic attraction plate and a non-magnetic magnetic pole pressing plate, and the supporting top plate, the magnetic attraction plate and the magnetic pole pressing plate are sequentially arranged in parallel; the lower end of the driving screw rod is rotationally connected with the magnetic plate, the upper end of the driving screw rod penetrates through the supporting top plate, the driving screw rod is in threaded connection with the supporting top plate, the guide screw rods are fixed to the supporting top plate and correspond to the magnetic pole mounting holes respectively, and the magnetic plate and the magnetic pole pressing plate movably sleeve the guide screw rods; the magnetic attraction plate is used for attracting the magnetic pole block to the bottom end of the magnetic pole pressing plate, and when the driving screw rotates, the magnetic attraction plate can be controlled to be close to or away from the supporting top plate. The tool solves the technical problem that deviation exists in surface-mounted rotor magnetic pole assembly, and has the advantage of being high in positioning precision.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind generator rotor pole assembly, and in particular relates to a surface mounting tool and method for a permanent magnet semi-direct drive wind turbine rotor pole. Background Art

[0002] In the prior art, the rotor poles of a permanent magnet semi-direct drive wind turbine generator are mainly composed of a pole box and a rotor yoke ring. According to the different connection methods between the poles and the rotor yoke ring, they can be divided into the following types: Figure 4 The embedded rotor poles shown and Figure 5 The surface-mounted rotor poles shown in the figure. The assembly of the embedded rotor poles requires the use of a pole push-and-place device, which pushes and places the pole boxes step by step along the central axis of the rotor yoke ring. This assembles intricate steps and requires high equipment and tooling costs.

[0003] Compared with embedded rotor poles, surface mounted rotor poles have different characteristics in structure and assembly. Figure 6 As shown, the outer surface of the rotor yoke ring 11 is evenly distributed with a number of surface mounting areas 12 for mounting magnetic pole blocks 14. Each surface mounting area 12 corresponds to a magnetic pole block 14. Each surface mounting area 12 is provided with a mounting through hole. Usually, the mounting through holes are designed in a layout of three rows and three columns, a total of nine. Figure 6 Taking the direction shown as an example, the middle row serves as the positioning holes 120, while the two rows on both sides serve as the pole mounting holes. At the same time, the pole blocks 14 are provided with positioning process holes (not shown in the figures) that correspond one-to-one with the positioning holes 120, as well as bolt holes (not shown in the figures) that correspond one-to-one with the pole mounting holes. Thus, the pole blocks 14 are surface-mounted on the outer surface of the rotor yoke ring 11 through the positioning process holes, bolt holes, and mounting holes in the surface mounting area 12. Therefore, compared with embedded rotor poles, surface-mounted rotor poles have significant advantages in terms of structural simplification and material utilization.

[0004] For example, Chinese patent document CN115864700A discloses a surface-mounted magnetic steel rotor structure for a high-power permanent magnet wind turbine. This technical solution has a simple structure and omits a magnetic pole pushing and releasing device, which reduces the amount of permanent magnetic material and magnets used, improves the utilization rate of permanent magnetic materials, and enhances the overall economic efficiency of the generator. However, the technical solution disclosed in this patent document only describes the compression and reinforcement of the salient poles through the wedge-shaped matching structure of the trapezoidal inclined surface of the pole block and the inverted trapezoidal pressure plate. The matching gap of the inclined surface can easily lead to circumferential / axial displacement of the magnetic poles, resulting in deviations in the magnetic pole assembly, which can easily change the magnetic circuit and have a negative impact on the performance of the generator.

[0005] To this end, it is urgent to develop an innovative surface-mount rotor pole surface-mounting tooling and method to solve the technical problem of deviation in the assembly of surface-mount rotor poles, and to improve the positioning accuracy of the surface-mount rotor poles on the rotor yoke ring, thereby ensuring good performance of the generator. Summary of the Invention

[0006] The purpose of the present invention is to solve the above-mentioned problems existing in the prior art, and to provide a surface-mount tooling and method for the rotor poles of a permanent magnet semi-direct-drive wind turbine motor, which effectively solves the technical problem of deviation in the assembly of surface-mounted rotor poles and significantly improves the positioning accuracy of the surface-mounted rotor poles and the good performance of the generator.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows: On the one hand, the present invention provides a surface mounting tooling for the rotor poles of a permanent magnet semi-direct drive wind turbine motor, comprising a support top plate, a driving screw, a guide screw, a magnetic plate and a non-magnetic magnetic pole pressure plate, wherein the support top plate, the magnetic plate and the magnetic pole pressure plate are arranged in parallel in sequence, the lower end of the driving screw is rotatably connected to the magnetic plate, the upper end passes through the support top plate, and the driving screw is threadedly connected to the support top plate, the guide screw is fixed on the support top plate and corresponds to the magnetic pole mounting holes respectively, the magnetic plate and the magnetic pole pressure plate are both movably mounted on the guide screw; the guide screw is used to pass through the magnetic pole block, and the magnetic plate is used to adsorb the magnetic pole block to the bottom end of the magnetic pole pressure plate, and when the driving screw rotates, the magnetic plate can be controlled to approach or move away from the support top plate.

[0008] A bearing mounting plate is fixed on the magnetic plate, a thrust bearing is mounted on the middle portion of the top end of the bearing mounting plate, and the thrust bearing is fixedly connected to the magnetic plate.

[0009] The shape of the bottom end surface of the magnetic pole pressure plate is adapted to the shape of the outer surface of the magnetic pole block.

[0010] The number of the guide screws is 2-4.

[0011] The upper end of the driving screw is configured as a regular hexagonal prism structure adapted to the contact portion of the electric wrench.

[0012] On the other hand, the present invention also provides a surface mounting method, which is implemented according to the surface mounting tool, comprising the following steps: a. Place the rotor yoke ring horizontally and prepare for pole surface mounting; b. Pass the lower end of the lead screw through the magnetic pole block. Under the magnetic attraction of the magnetic plate, the magnetic pole block is attracted and abuts against the bottom end surface of the magnetic pole pressure plate; c. Insert the lower end of the lead screw into the corresponding magnetic pole mounting hole, and rotate the drive screw to control the magnetic plate to move closer to the rotor yoke ring until the magnetic pole block is in close contact with the surface mounting area; d. Use bolts to pre-connect the pole blocks to the rotor yoke, then rotate the drive screw to control the magnetic plate to move away from the rotor yoke until the magnetic plate releases its magnetic attraction to the pole blocks; e. Remove the lead screw from the magnetic pole mounting hole to complete the pre-positioning of the magnetic pole block in the surface mounting area. Then, use at least two positioning pins to insert the magnetic pole block from the inner surface of the rotor yoke ring to complete the final positioning of the magnetic pole block in the surface mounting area. After the final positioning is completed, tighten the bolts and remove the positioning pins to complete the surface mounting of the magnetic pole block in the surface mounting area. f. Repeat steps b to e to complete the surface mounting of all magnetic pole pieces on the rotor yoke ring.

[0013] Preferably, all the magnetic pole blocks are arranged in a column and surface mounted sequentially from bottom to top.

[0014] Preferably, all magnetic pole blocks need to be weighed before being passed through by the guide screw. The weighing method includes: in two columns of patch areas relatively distributed with the central axis of the rotor yoke ring as the axis of symmetry, the total weight of all magnetic pole blocks corresponding to one column of patch areas is recorded as A, and the total weight of all magnetic pole blocks corresponding to the other column of patch areas is recorded as B, and the difference between A and B is controlled to be less than 20g.

[0015] Furthermore, the surface mounting method also includes step g, which is specifically: after completing the surface mounting of all magnetic pole blocks, all magnetic pole blocks in each column mounting area form a column of magnetic poles, a magnetic pole strip is installed between two adjacent columns of magnetic poles, and epoxy glue is filled between the two sides of the magnetic pole strip and the magnetic poles.

[0016] The advantages of adopting the present invention are: 1. The surface mounting tooling for the permanent magnet semi-direct drive wind turbine rotor poles provided by the present invention, firstly, constructs a stable tooling frame structure by arranging a supporting top plate, a magnetic attraction plate and a magnetic pole pressure plate arranged in parallel, and a guide screw fixed to the supporting top plate and capable of passing through the magnetic pole block, thereby providing a reliable basic support for the surface mounting operation of the magnetic pole block, realizing the stability of the tooling structure and improving the stability of the surface mounting process.

[0017] Secondly, by driving the lower end of the screw rod in rotation with the magnetic plate, and the upper end passing through the support top plate and being threadedly connected to the support top plate, the magnetic plate can be precisely controlled to move closer to or away from the support top plate when the driving screw rod is rotated, thereby flexibly adjusting the adsorption and release of the magnetic pole block by the magnetic plate, thereby realizing the controllability of the adsorption and release operation of the magnetic pole block, and improving the convenience and accuracy of the surface mounting operation of the magnetic pole block.

[0018] Third, the guide screw corresponds to the pole mounting hole, and the magnetic plate and the pole pressure plate are movably mounted on the guide screw. This design can ensure that the pole block moves accurately along the guide screw during the surface mounting process, ensuring the precise alignment of the pole block and the surface mounting area, achieving the accuracy of the pole block positioning, improving the surface mounting accuracy, avoiding the deviation or misalignment of the pole block during the installation process, and effectively solving the technical problem of deviation in the assembly of surface mounted rotor poles.

[0019] Fourth, given that the pole blocks have strong magnetism, during the traditional manual handling and installation process, when the poles are close to the rotor yoke ring, they are easily adsorbed by the strong magnetic force and cannot be installed normally, and there is a safety risk of pinching the operator's hands. If the pole block is mistakenly adsorbed to a non-predetermined position, it is difficult to remove it manually under the action of the strong magnetic force. The permanent magnet motor surface-mounted rotor pole surface-mounted tooling provided by the present invention realizes automatic adsorption and precise positioning of the pole block installation through the magnetic suction unit, avoiding direct manual contact with the pole block, significantly improving the safety of the operation process, and effectively reducing the safety risks caused by strong magnetism.

[0020] In addition, the non-magnetic pole pressure plate is movably mounted on the guide screw. After the pole block is adsorbed by the magnetic plate, the pole pressure plate can apply uniform pressure to the pole block on its bottom end face, so that the pole block fits tightly to the surface area of ​​the rotor yoke ring. Since the pole pressure plate is made of non-magnetic material, it will not interfere with the magnetism of the pole block, ensuring that the magnetic properties of the pole block are not affected. This combination of magnetic attraction and pressing effectively solves the problem of assembly deviation of the pole block caused by weak adsorption or uneven pressure during the surface mounting process, thereby improving the quality and reliability of the pole assembly. At the same time, when the magnetic plate produces a magnetic attraction on the pole block, the pole block is tightly attached to the bottom end face of the non-magnetic pole pressure plate. This design eliminates the traditional bolt connection method, thereby improving assembly convenience and efficiency.

[0021] Fifth, the technical solution represented by the Chinese patent document with publication number CN115864700A relies solely on screws for axial locking. However, when the semi-direct drive rotor is in normal operation, its outer surface will generate a large linear velocity of about 80-100 m / s. In this case, the compression and reinforcement of the salient poles is achieved only by the wedge-shaped matching structure of the trapezoidal inclined surface of the pole block and the inverted trapezoidal pressure plate strip. The reliability against centrifugal force is poor, and the shear force generated during the operation of the generator can easily cause the screws to loosen or the poles to fall off. Once the connection reliability between the poles and the rotor yoke ring is defective, the permanent magnets will fall off or be damaged, which may cause serious accidents such as unplanned shutdown of the generator set. The present invention, by equipping a special rotor pole surface mounting tool to assist the pole blocks in being fixed to the rotor yoke ring, ensures the reliability of the connection and improves the stability and safety of the generator operation.

[0022] In summary, the present invention effectively solves the technical problem of deviation in the assembly of surface-mounted rotor poles, improves the positioning accuracy of surface-mounted rotor poles on the rotor yoke ring, ensures the stability of the magnetic circuit, and guarantees good performance of the generator.

[0023] 2. In the present invention, by fixing the bearing mounting plate on the magnetic plate and installing a thrust bearing fixedly connected to the magnetic plate in the middle of the top of the bearing mounting plate, this structure can effectively disperse the pressure generated by the magnetic plate when it is subjected to the gravity of the magnetic pole block and the magnetic force, reduce the wear and deformation of the magnetic plate, achieve the durability of the magnetic plate structure, and improve the service life of the tooling.

[0024] 3. In the present invention, the shape of the bottom end surface of the pole pressure plate is designed to be adapted to the shape of the outer surface of the pole block, so that the pole pressure plate can fully fit the pole block, increasing the contact area, thereby applying pressure more evenly, ensuring the stability of the pole block during the surface mounting process, achieving the uniformity of the surface mounting of the pole block, and improving the surface mounting quality.

[0025] 4. In the present invention, the number of guide screws is reasonably set to 2-4 and inserted into the corresponding pole mounting holes. This can not only stably penetrate the pole block and provide sufficient guidance and support for the pole block, but also the remaining pole mounting holes can provide connection support conditions for the pre-connection of the pole block in the corresponding surface mounting area.

[0026] 5. In the present invention, the upper end of the driving screw is set to a regular hexagonal prism structure that is compatible with the contact part of the electric wrench, which makes it convenient to use the electric wrench to quickly and accurately rotate the driving screw, thereby improving the efficiency and accuracy of the driving screw rotation, thereby accelerating the moving speed of the magnetic plate and achieving high efficiency of the surface mounting operation.

[0027] 6. In the present invention, by using the aforementioned surface mounting tooling, a complete and systematic set of surface mounting steps is formed, from the horizontal placement preparation of the rotor yoke ring to the adsorption, positioning, pre-connection, final positioning of the pole blocks and the final completion of the surface mounting of all pole blocks. This forms a set of effective surface mounting methods, improves the operability and accuracy of the surface mounting process, effectively solves the technical problem of deviation in the assembly of surface mounted rotor poles, improves the assembly efficiency of surface mounted rotor poles, and enhances the positioning accuracy and assembly quality of the pole blocks on the rotor yoke ring.

[0028] 7. All pole blocks are arranged in a columnar manner from bottom to top and then mounted. This arrangement and mounting order can make the tooling more evenly stressed during operation. The pole blocks mounted below can provide stable support for the pole blocks being mounted above them, ensuring the installation process quality during the mounting process and the structural stability of the pole blocks being mounted, reducing tooling deformation and pole block offset problems caused by improper mounting order, achieving the rationality of the pole block mounting order, and improving the mounting accuracy and stability.

[0029] 8. In the present invention, all magnetic pole pieces are weighed before being passed through by the guide screw, and the central axis of the rotor yoke ring is used as the symmetry axis to control the total weight difference of all magnetic pole pieces corresponding to the two relatively distributed columns of pasting areas to be less than 20g. This reduces the vibration and unbalanced force generated by the uneven distribution of magnetic pole weight during the rotation of the rotor, improves the balance of the rotor, reduces the vibration and noise of the rotor during operation caused by uneven weight, achieves the optimization of the rotor weight balance, and improves the operating stability and performance of the generator.

[0030] 9. In the present invention, after completing the surface mounting of all the pole blocks in each column mounting area, a pole strip is installed between two adjacent poles, and epoxy glue is applied on both sides of the pole strip before installing the pole strip, thereby improving the connection stability between the pole blocks and enhancing the structural strength and overall performance of the generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a diagram showing the use of the present invention with magnetic poles attached to the rotor yoke ring; Figure 3 It is a structural diagram of a positioning pin in the prior art; Figure 4 It is a structural diagram of an embedded rotor pole in the prior art; Figure 5 It is a schematic diagram of the structure of the surface-mounted rotor pole in the prior art; Figure 6 The figure is a schematic diagram of the surface mounting area structure of the rotor yoke ring in the prior art.

[0032] The numbers in the figure are: 1. Magnetic plate, 120. Positioning hole, 2. Support top plate, 3. Center nut, 4. Drive screw, 5. Square nut, 6. Lead screw, 7. Bearing mounting plate, 8. Pole pressure plate, 9. Thrust bearing, 10. Handle, 11. Rotor yoke ring, 12. Surface mounting area, 120. Positioning hole, 121. Pole mounting hole C, 122. Pole mounting hole A, 123. Pole mounting hole B, 13. Positioning pin, 14. Pole block. DETAILED DESCRIPTION

[0033] To further clarify the objectives, technical solutions, and advantages of the embodiments of the present invention, the following provides a clear and complete description of the technical solutions of the embodiments of the present invention, in conjunction with the accompanying drawings. For ease of description, the relative positions of the various components are described based on the layout of the accompanying drawings. For example, the positions of front, back, top, bottom, left, and right are determined based on the layout of the accompanying drawings.

[0034] Example 1 In this embodiment, a surface mount tooling for a permanent magnet semi-direct drive wind turbine rotor pole is provided, such as Figure 1 As shown, it includes a supporting top plate 2, a driving screw 4, a lead screw 6, a magnetic attraction plate 1 and a non-magnetic magnetic pole pressure plate 8.

[0035] The support top plate 2, magnetic plate 1, and magnetic pole pressure plate 8 are arranged in parallel. The lower end of the drive screw 4 is rotatably connected to the magnetic plate 1, and the upper end passes through the support top plate 2, where the drive screw 4 is threadedly connected to the support top plate 2. When the drive screw 4 and the support top plate 2 are threaded together, the middle portion of the drive screw 4 is preferably connected to the middle portion of the support top plate 2. A center nut 3 is fixed to the support top plate 2, and the drive screw 4 and the support top plate 2 are threadedly connected via the center nut 3. The center nut 3 is made of tin bronze and its specifications and dimensions are suitable for the overall structure of the surface mount tooling.

[0036] Lead screws 6 are fixed to the support top plate 2 and correspond to the pole mounting holes. Lead screws 6 are also bolted to the support top plate 2 via square nuts 5 fixed to the support top plate 2. Square nuts 5 are made of brass or tin bronze and have dimensions that are compatible with the overall structure of the surface mount fixture.

[0037] The magnetic plate 1 and the magnetic pole pressure plate 8 are both movably mounted on the lead screw 6. Figure 1 Taking the illustrated orientation as an example, the guide screw 6 is used to penetrate the magnetic pole piece 14, specifically by inserting the lower end of the guide screw 6 into the magnetic pole piece 14. The magnetic plate 1 is used to attract the magnetic pole piece 14 to the bottom end of the magnetic pole pressure plate. When the drive screw 4 rotates, the magnetic plate 1 is controlled to move closer to or farther from the support top plate 2.

[0038] Once the magnetic pole piece 14 is inserted by the guide screw 6, the drive screw 4 is rotated to control the magnetic plate 1 to move away from the support top plate 2 and closer to the magnetic pole piece 14. Under the magnetic attraction of the magnetic plate 1, the magnetic pole piece 14 is attracted and tightly adheres to the bottom end surface of the magnetic pole pressure plate 8. This design eliminates the traditional bolt connection method and improves the convenience and efficiency of magnetic pole assembly.

[0039] Example 2 Based on the structure of Example 1, this embodiment optimizes the surface mount tooling structure.

[0040] For details, please refer to Figure 1 A bearing mounting plate 7 is fixed on the magnetic plate 1 , a thrust bearing 9 is installed at the middle of the top of the bearing mounting plate 7 , and the thrust bearing 9 is fixedly connected to the magnetic plate 1 .

[0041] In addition, the main function of the pole pressure plate 8 is to closely adhere to and support the magnetic pole block 14 to be surface-mounted during the surface mounting process. In order to better achieve this function, the shape of the bottom end face of the pole pressure plate 8, that is, the face in contact with the magnetic pole block 14, is designed to be adapted to the outer surface shape of the magnetic pole block 14. It should be noted that the outer surface of the magnetic pole block 14 mentioned here is the face in contact with the bottom end face of the pole pressure plate 8, while its inner surface is the face in contact with the rotor yoke ring 11. Since the outer surface shape structure of a single magnetic pole block 14 belongs to the known technology in the art, it will not be described here in detail, and can be understood by referring to the Chinese patent document with publication number CN115864700A.

[0042] The magnetic plate 1 is made of carbon steel, preferably the economical ferromagnetic material Q235B. The drive screw 4 is made of the same tin bronze as the center nut 3, specifically HSn90-1. This material has high strength, elasticity, and wear resistance, which can reduce friction loss caused by the rotation of the drive screw 4 and increase the service life of the surface mount tooling. In addition, the non-ferromagnetic tin bronze material can avoid the generation of magnetic forces between it and the magnetic pole block 14, which may affect the normal use of the tooling. The support top plate 2, guide screw 6, bearing mounting plate 7, and magnetic pole pressure plate 8 are all made of non-magnetic stainless steel, specifically 06Cr19Ni10. While ensuring the overall economic efficiency of the surface mount tooling, it can effectively avoid magnetic forces and ensure the normal use of the surface mount tooling.

[0043] Furthermore, the number of the guide screws 6 is designed to be 2-4. The guide screws 6 can be arranged around the drive screw 4 or on one side of the drive screw 4. As a preferred solution, combined with Figure 1 and Figure 6 It is understood that the number of the lead screws 6 is preferably two, and the drive screw 4 is located between the two lead screws 6, so that when performing the surface mounting operation of the magnetic pole, it is adapted to the following conditions: Figure 6 The layout structure of the three rows and three columns of nine mounting holes in the surface mount area 12 is shown in FIG. Figure 6 In the illustrated layout of nine mounting holes, arranged in three rows and three columns, the upper and lower pole mounting holes are designated as pole mounting hole C121, while the two pole mounting holes in the middle row and on either side of the column are designated as pole mounting hole A122 and pole mounting hole B123, respectively. When the pole piece 14 is positioned for surface mounting in the surface mounting area 12, the lower ends of the two lead screws 6 extend through the bolt holes in the pole piece 14 and are inserted into pole mounting hole A122 and pole mounting hole B123, respectively. Pole mounting hole C121 is used for pre-assembly and connection of the pole piece 14 in the surface mounting area 12.

[0044] Furthermore, the upper end of the drive screw 4 is configured as a regular hexagonal prism structure that matches the contact portion of the electric wrench. The axial length of the regular hexagonal prism structure is approximately 30 mm to ensure that the electric wrench can stably and accurately control the rotation of the drive screw 4 .

[0045] Example 3 In this embodiment, a surface mounting method is provided. The method is implemented by mounting the magnetic pole piece 14 on the rotor yoke ring 11 according to the surface mounting tooling of Embodiments 1 and 2, and includes the following steps: a. Place the rotor yoke ring horizontally and prepare for pole surface mounting.

[0046] To horizontally position the rotor yoke 11, use a crane to steadily hoist the rotor yoke 11 in its original factory position (non-drive end facing upward) and place it on a support fixture, ensuring the lower end of the rotor yoke 11 is approximately 110-130 mm above the ground. Next, place a 0.35 mm thick punch under the middle flange of the rotor yoke 11 to adjust the flange's levelness to within 0.5 / 1000 mm.

[0047] During preparation for pole surface mounting, the rotor yoke 11 should also be cleaned. The specific steps are as follows: First, use a pneumatic compressed air spray gun at a compressed air pressure of 0.15-1 MPa to thoroughly clean the inner and outer surfaces of the rotor yoke 11 and all screw holes (including the mounting holes). While performing the air cleaning, spray the cleaning areas with TS1755EF cleaning agent. Next, wipe the outer surface of the rotor yoke 11 dry with a clean, dry white cloth. Use a flashlight and visually inspect the outer surface of the rotor bracket for stains, oil spots, or foreign matter until the entire cleaning process is complete. This ensures that the rotor yoke 11 is clean and meets the cleanliness standards for subsequent assembly processes.

[0048] b. Pass the lower end of the lead screw 6 through the magnetic pole block. Under the magnetic attraction of the magnetic plate 1, the magnetic pole block is adsorbed and abuts against the bottom end surface of the magnetic pole pressure plate 8.

[0049] In step b, the steps that can be further refined are: first, use an electric wrench to rotate the drive screw 4 to control the magnetic plate 1 to move in the direction close to the support top plate 2, until it is confirmed that the lower end of the guide screw 6 has left a distance that allows it to pass through the bolt hole of the magnetic pole block 14 and the corresponding magnetic pole mounting hole at the same time; then, pass the lower end of the guide screw 6 through the bolt hole on the magnetic pole block 14, and prevent the magnetic pole block 14 from moving on the guide screw 6 by hand. At the same time, continue to use an electric wrench to rotate the drive screw 4 to control the magnetic plate 1 to move in the direction away from the support top plate 2, until the magnetic plate 1 magnetically attracts the magnetic pole block 14, so that the magnetic plate 1, the magnetic pole pressure plate 8 and the magnetic pole block 14 are tightly attached in sequence, that is, the magnetic pole block 14 is adsorbed and tightly attached to the bottom end surface of the magnetic pole pressure plate 8.

[0050] c. The operator holds the support top plate 2 with the handle 10 provided on the support top plate 2, inserts the lower end of the guide screw 6 into the corresponding magnetic pole mounting hole, and rotates the drive screw 4 to control the magnetic attraction plate 1 to approach the rotor yoke ring 11 until the magnetic pole block 14 is tightly attached to the surface mounting area 12.

[0051] In step c, before the lower end of the guide screw 6 is inserted into the corresponding magnetic pole mounting hole, if the distance left for the lower end of the guide screw 6 to insert into the corresponding magnetic pole mounting hole is limited, an electric wrench can be used to rotate the drive screw 4, and fine-tune the close-fitting magnetic plate 1, magnetic pole pressure plate 8 and magnetic pole block 14 to move simultaneously in the direction close to the support top plate 2 until it is confirmed that the lower end of the guide screw 6 can be smoothly inserted into the corresponding magnetic pole mounting hole.

[0052] d. Use bolts to pre-connect the magnetic pole block 14 and the rotor yoke ring 11, and then rotate the drive screw 4 to control the magnetic attraction plate 1 to move away from the rotor yoke ring 11 until the magnetic attraction plate 1 releases the magnetic attraction effect on the magnetic pole block 14.

[0053] Combine Figure 1 and Figure 6 For example, in the case of a surface mount design with two lead screws 6, the drive screw 4 is located between the two lead screws 6, and the two lead screws correspond to the pole mounting hole A122 and the pole mounting hole B123 of the surface mount area 12, respectively. Applied to steps c and d, the lower ends of the two lead screws 6 are inserted into the pole mounting hole A122 and the pole mounting hole B123, respectively. The pole mounting hole C121 is used as follows: four bolts are inserted from the inner surface of the rotor yoke 11 through the four pole mounting holes C121, and then screwed into the bolt holes on the pole block 14 corresponding to the four pole mounting holes C121, thereby completing the pre-assembly connection between the pole block 14 and the rotor yoke 11.

[0054] e. Remove the guide screw 6 from the pole mounting hole to complete the pre-positioning of the pole block in the surface mounting area. Then, use at least two positioning pins 13 to insert the pole blocks from the inner surface of the rotor yoke ring 11. During the insertion process, use a wooden hammer to tap until the final positioning of the pole block 14 in the surface mounting area 12 is completed. After the final positioning is completed, tighten the bolts and remove the positioning pins 13 to complete the surface mounting of the pole block 14 in the surface mounting area 12.

[0055] In step e, combine Figure 3 and Figure 6 For understanding, the positioning pin 13 adopts a stepped shaft structure design, including a large diameter section and a small diameter section. The small diameter section is used to pass through the positioning hole 120 of the surface-mounted area 12 from the inner surface of the rotor yoke ring 11, and then inserted into the positioning process hole corresponding to the positioning hole 120 on the pole block 14. Thus, by the coordinated cooperation of at least two positioning pins 13, the surface-mounted positioning of the pole block 14 on the rotor yoke ring 11 can be achieved, which can effectively meet the positional requirements of the surface-mounted pole block 14. When designing the outer diameters of the large diameter section and the small diameter section of the positioning pin 13, those skilled in the art can determine them according to the aperture of the positioning hole 120 on the rotor yoke ring 11 and the aperture of the positioning process hole on the pole block 14 corresponding to the positioning hole 120. Since this design process belongs to the conventional means in this field, it will not be repeated here.

[0056] To ensure that the magnetic pole block 14 can be installed in place accurately, the clearance between the small diameter section of the positioning pin 13 and the positioning hole 120 and the positioning process hole is controlled between 0.05-0.1mm to ensure that the positioning pin 13 is neither too tight to make surface attachment difficult nor too loose to affect the positioning accuracy, thereby achieving reliable assembly and precise positioning of the magnetic pole block 14.

[0057] f. Repeat steps b to e to complete the surface mounting of all magnetic pole pieces on the rotor yoke ring.

[0058] It should be noted that steps b to e are all performed to perform surface mounting of a single magnetic pole piece 14 .

[0059] Furthermore, all the magnetic pole blocks 14 are surface mounted in sequence from bottom to top in a column-like arrangement. That is, after the rotor yoke ring 11 is placed horizontally, in each column of surface mounting areas, starting from the bottom surface mounting area 12, the surface mounting of the corresponding magnetic pole blocks 14 in each column of surface mounting areas is completed in sequence upward. In this process, the magnetic pole blocks 14 that have been surface mounted below can provide stable support for the magnetic pole blocks 14 that are being surface mounted above them. Moreover, in all the column surface mounting areas, the surface mounting operation is preferably started from the column surface mounting area where the magnetic pole block 14 with the N-level polarity is located. This ensures the quality of the installation process during the surface mounting process and the structural stability of the surface mounted magnetic pole blocks 14.

[0060] Furthermore, since there is a weight difference between each magnetic pole piece 14, all magnetic pole pieces 14 need to be weighed before being passed through by the guide screw 6. The weighing method includes: with the central axis of the rotor yoke ring 11 as the axis of symmetry, in two relatively distributed columns of pasting areas 12, the total weight of all magnetic pole pieces 14 corresponding to one column of pasting areas 12 is recorded as A, and the total weight of all magnetic pole pieces 14 corresponding to the other column of pasting areas 12 is recorded as B, and the difference between A and B is controlled to be less than 20g, thereby ensuring the balance and stability of the permanent magnet semi-direct drive wind turbine rotor during normal operation and improving safety and reliability.

[0061] In addition, the present invention provides a method for surface-mounting the rotor poles of a permanent magnet semi-direct-drive wind turbine, which also includes step g. Step g is specifically as follows: after completing the surface mounting of all the pole blocks 14, all the pole blocks 14 in each column mounting area 12 form a column of poles, a pole strip is installed between two adjacent columns of poles, and epoxy glue is filled between the pole strips on both sides and between the poles. This effectively improves the overall strength of the rotor poles and prevents damage to the poles due to centrifugal force when the rotor rotates at high speed. The epoxy glue model is preferably TS832. In addition, the method for fixing the pole strips on the rotor yoke ring 11 can be understood by referring to the Chinese patent document with publication number CN115864700A, which will not be repeated here.

[0062] After all the magnetic pole blocks 14 are fixed with the pole strips and epoxy glue, a pulsed argon arc welder WSM-400 is used as welding equipment to perform argon arc spot welding on all the tightened bolts on the inner surface of the rotor yoke ring 11, so that the bolts and the rotor yoke ring 11 are firmly welded together. During the welding process, the welding current is controlled within the range of 180-200A.

[0063] Finally, the rotor yoke ring 11 is left to stand for 4-8 hours to allow the epoxy adhesive applied between the pole strip and the pole to completely solidify. Foreign matter is cleaned again to complete the pole assembly.

[0064] The above description is only a specific embodiment of the present invention. Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes; all disclosed features, or all steps in the methods or processes, except for mutually exclusive features and / or steps, can be combined in any way.

Claims

1. A surface mounting fixture for a permanent magnet semi-direct drive wind turbine rotor pole, characterized by: The invention comprises a supporting top plate (2), a driving screw (4), a guide screw (6), a magnetic plate (1) and a non-magnetic magnetic pole pressure plate (8), wherein the supporting top plate (2), the magnetic plate (1) and the magnetic pole pressure plate (8) are arranged in parallel in sequence, the lower end of the driving screw (4) is rotatably connected to the magnetic plate (1), the upper end passes through the supporting top plate (2), and the driving screw (4) is threadedly connected to the supporting top plate (2), the guide screw (6) is fixed on the supporting top plate (2) and corresponds to the magnetic pole mounting holes respectively, the magnetic plate (1) and the magnetic pole pressure plate (8) are both movably sleeved on the guide screw (6); the guide screw (6) is used to pass through the magnetic pole block, the magnetic plate (1) is used to adsorb the magnetic pole block to the bottom end of the magnetic pole pressure plate (8), and when the driving screw (4) rotates, the magnetic plate (1) can be controlled to approach or move away from the supporting top plate (2).

2. The surface mounting fixture for the rotor poles of a permanent magnet semi-direct drive wind turbine according to claim 1, characterized in that: A bearing mounting plate (7) is fixed on the magnetic plate (1), a thrust bearing (9) is mounted on the middle portion of the top end of the bearing mounting plate (7), and the thrust bearing (9) is fixedly connected to the magnetic plate (1).

3. The surface mounting fixture for the rotor poles of a permanent magnet semi-direct drive wind turbine according to claim 2, characterized in that: The shape of the bottom end surface of the magnetic pole pressure plate (8) is adapted to the shape of the outer surface of the magnetic pole block.

4. The surface mounting fixture for the permanent magnet semi-direct drive wind turbine rotor pole according to claim 1, characterized in that: The number of the guide screws (6) is 2-4.

5. The surface mounting fixture for the rotor poles of a permanent magnet semi-direct drive wind turbine according to claim 1, characterized in that: The upper end of the driving screw (4) is configured as a regular hexagonal prism structure adapted to the contact portion of the electric wrench.

6. A surface mounting method, implemented by the surface mounting tool according to any one of claims 1 to 5, characterized in that: The steps include: a. Place the rotor yoke ring horizontally and prepare for pole surface mounting; b. Pass the lower end of the guide screw (6) through the magnetic pole block. Under the magnetic attraction of the magnetic plate (1), the magnetic pole block is attracted and abuts against the bottom end surface of the magnetic pole pressure plate (8); c. Insert the lower end of the guide screw (6) into the corresponding magnetic pole mounting hole, and rotate the drive screw (4) to control the magnetic plate (1) to move closer to the rotor yoke ring until the magnetic pole block is tightly attached to the surface mounting area; d. Pre-connect the magnetic pole block and the rotor yoke ring with bolts, and then rotate the drive screw (4) to control the magnetic attraction plate (1) to move away from the rotor yoke ring until the magnetic attraction plate (1) releases the magnetic attraction effect on the magnetic pole block; e. withdrawing the guide screw (6) from the magnetic pole mounting hole to complete the pre-positioning of the magnetic pole block in the surface mounting area, and then inserting at least two positioning pins (13) into the magnetic pole block from the inner surface of the rotor yoke ring to complete the final positioning of the magnetic pole block in the surface mounting area. After the final positioning is completed, tighten the bolts and withdraw the positioning pins (13) to complete the surface mounting of the magnetic pole block in the surface mounting area; f. Repeat steps b to e to complete the surface mounting of all magnetic pole pieces on the rotor yoke ring.

7. A surface mounting method according to claim 6, characterized in that: All magnetic pole blocks are arranged in a column-like manner and surface mounted from bottom to top.

8. A surface mounting method according to claim 7, characterized in that: All magnetic pole blocks need to be weighed before being passed through by the guide screw (6). The weighing method includes: taking the central axis of the rotor yoke ring as the axis of symmetry and the two columns of relatively distributed pasting areas, the total weight of all magnetic pole blocks corresponding to one column of pasting areas is recorded as A, and the total weight of all magnetic pole blocks corresponding to the other column of pasting areas is recorded as B, and the difference between A and B is controlled to be less than 20g.

9. The surface mounting method according to claim 6, characterized in that: The method further includes step g, which specifically comprises the following steps: after the surface mounting of all magnetic pole blocks is completed, all magnetic pole blocks in each column mounting area form a column of magnetic poles, a magnetic pole strip is installed between two adjacent columns of magnetic poles, and epoxy glue is filled between the two sides of the magnetic pole strip and the magnetic poles.

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