Large-diameter direct-drive permanent magnet synchronous magnetic isolation locking structure

Abstract

This invention discloses a large-diameter direct-drive permanent magnet synchronous magnetic isolation locking structure, including a rotor hub. Multiple lamination magnetic isolation fixing blocks are sequentially arranged around the periphery of the rotor hub. A triangular portion extends outward from the center of each lamination magnetic isolation fixing block. Laminations are correspondingly arranged on the outer edge of each lamination, and triangular grooves are formed on the inner side of each lamination corresponding to the triangular portion. A placement groove is formed between two adjacent laminations, and a magnet is correspondingly placed in the placement groove. This invention adopts a single-tooth structure, and locking is achieved through the cooperation between the triangular groove on the lamination and the triangular portion on the magnetic isolation fixing block. This design is convenient to install and also safer and more practical.

Description

Technical Field

[0001] This invention relates to a magnetic isolation locking structure, and more particularly to a large-diameter direct-drive permanent magnet synchronous magnetic isolation locking structure. Background Technology

[0002] Currently, the design and processing of rotor tooth magnetic circuits for large-diameter direct-drive permanent magnet synchronous motors suffers from severe magnetic leakage and the pain point of using a large amount of expensive permanent magnets, which has always been constrained by design and process. Good magnetic circuit isolation reduces the amount of permanent magnets used, but the process is difficult to operate and time-consuming. On the other hand, easy processing sacrifices magnetic leakage, resulting in greater magnetic leakage losses and an increase in the amount of permanent magnets used, which increases material and manufacturing costs. At the same time, the locking installation between most single-tooth laminations and lamination magnetic isolation fixing blocks is not stable enough, which can easily lead to structural deformation during use and pose certain safety hazards.

[0003] Therefore, there is a need to provide a large-diameter direct-drive permanent magnet synchronous magnetic isolation locking structure to at least solve one of the problems mentioned above, such as difficult operation, labor and time consumption, large magnetic leakage loss, and unstable locking. Summary of the Invention

[0004] In view of this, the present invention provides a large-diameter direct-drive permanent magnet synchronous magnetic isolation locking structure. The purpose is to provide a large-diameter direct-drive permanent magnet synchronous magnetic isolation locking structure that is simple to manufacture, saves time and effort, and is more stable.

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

[0006] A large-diameter direct-drive permanent magnet synchronous magnetic isolation locking structure includes a rotor hub. Multiple lamination magnetic isolation fixing blocks are sequentially arranged around the periphery of the rotor hub. A triangular portion extends outward from the center of each lamination magnetic isolation fixing block. The inner side of the connection point between two adjacent lamination magnetic isolation fixing blocks is connected and positioned to the outer edge of the rotor hub via a metal key. Both sides of the multiple lamination magnetic isolation fixing blocks are connected to the outer edge of the rotor hub via hexagonal socket head cap screws. Laminations are correspondingly arranged on the outer edge of each lamination magnetic isolation fixing block. A triangular groove is formed on the inner side of each lamination corresponding to the triangular portion. A placement groove is formed between two adjacent laminations, and a magnet is correspondingly placed in the placement groove. The lamination magnetic isolation fixing blocks are formed by stretching non-magnetic profiles.

[0007] Preferably, the left and right ends of the stamping magnetic shielding fixing block are respectively provided with a limiting groove and a limiting block, and two adjacent stamping magnetic shielding fixing blocks are connected by the corresponding engagement of the limiting groove and the limiting block.

[0008] Preferably, an outer metal keyway is provided on the inner side of the connection between two adjacent lamination magnetic isolation fixing blocks, corresponding to the outer half of the outer periphery of the metal key, and an inner metal keyway is provided on the outer edge of the rotor hub, corresponding to the outer metal keyway.

[0009] Preferably, the left and right sides of the lamination magnetic isolation fixing block have two first threaded holes through the two internal hexagon bolts along the radial direction of the rotor hub, and the outer edge of the rotor hub has two second threaded holes corresponding to the two first threaded holes.

[0010] Preferably, the inner center of the stamped magnetic shielding fixing block is provided with a slot.

[0011] Preferably, the stamped magnetic shielding fixing block is arranged in a "mountain" shape.

[0012] The beneficial effects of this invention are as follows:

[0013] 1. This invention includes a plurality of lamination magnetic isolation fixing blocks sequentially arranged around the periphery of a rotor hub. A triangular portion extends outward from the center of each lamination magnetic isolation fixing block. The inner side of the connection between two adjacent lamination magnetic isolation fixing blocks is connected and positioned to the outer edge of the rotor hub via a metal key. Both sides of the plurality of lamination magnetic isolation fixing blocks are connected to the outer edge of the rotor hub via hexagonal socket head cap screws. Laminations are correspondingly arranged on the outer edge of the lamination magnetic isolation fixing blocks. A triangular groove is formed on the inner side of each lamination corresponding to the triangular portion. A placement groove is formed between two adjacent laminations, and a magnet is correspondingly placed within the placement groove. The triangular groove is a magnetic circuit design structure, which, compared to traditional straight grooves... Alternatively, a diamond-shaped slot design can be used, where the three-phase magnetic circuits are completely symmetrical and of equal length, resulting in a more uniform magnetic reluctance distribution. This reduces losses and unbalanced magnetic pull, lowers vibration and noise, and provides strong triangular stability, leading to higher overall strength of the laminations and making them less prone to deformation under external forces. This, to a certain extent, improves the overall reliability and lifespan of the motor. The winding arrangement is also optimized, with a high slot fill factor, which helps improve output power and efficiency. The regular shape of the triangular slots reduces processing difficulty, decreasing processing steps and time, and lowering processing costs. Furthermore, the relatively simple triangular slot structure facilitates the flow of cooling media (such as air), improving cooling efficiency to some extent. This design allows for the replacement of the original one-piece rotor lamination core... The structure is disassembled into a single-tooth configuration, consisting of laminations and lamination magnetic isolation fixing blocks. Multiple lamination magnetic isolation fixing blocks are sequentially connected and fixed to the outer periphery of the rotor hub using hexagonal socket head cap screws. Then, metal keys are placed into the keyways formed between the bottom of two adjacent lamination magnetic isolation fixing blocks and the top of the rotor hub periphery. Multiple laminations are then installed by their triangular slots engaging with the triangular portions of the multiple lamination magnetic isolation fixing blocks. After the laminations are installed, magnets are inserted into the multiple placement slots formed between multiple sets of adjacent laminations, corresponding to the direction of the rotor hub's axis. Compared to traditional large-diameter direct-drive permanent magnet synchronous magnetic isolation locking structures, this large-diameter direct-drive permanent magnet synchronous magnetic isolation locking structure... The single-tooth structure and distributed installation facilitate installation while significantly reducing operational difficulty and labor costs, saving time and effort. It also conserves the amount of valuable permanent magnets, saving energy and material and manufacturing costs, thus improving production efficiency. Furthermore, the locking mechanism formed by the interlocking of the triangular slots on the laminations and the triangular portions on the magnetic isolation blocks makes the entire rotor magnetic circuit more compact and stable during use, compared to the traditional installation method of single-tooth laminations and magnetic isolation blocks. This method also reduces safety hazards during operation.

[0014] 2. The present invention provides limiting grooves and limiting blocks at both ends of the stamped magnetic shielding fixing block. Adjacent stamped magnetic shielding fixing blocks are connected by corresponding engagement of the limiting grooves and limiting blocks. This setting facilitates quick positioning and installation between adjacent stamped magnetic shielding fixing blocks through the engagement of the limiting grooves and limiting blocks. The installation is convenient and also greatly reduces the difficulty of the process, reduces labor consumption, saves more time and effort, and helps to improve production efficiency.

[0015] 3. In this invention, an outer metal keyway is provided on the outer half of the metal key (the half away from the center of the rotor hub) at the connection point of two adjacent lamination magnetic isolation fixing blocks. An inner metal keyway is provided on the outer edge of the rotor hub corresponding to the outer metal keyway. The outer and inner metal keyways together form a metal keyway for placing the metal key. This arrangement ensures precise alignment between the magnetic isolation ring structure formed by multiple lamination magnetic isolation fixing blocks and the outer periphery of the rotor hub by tightly fitting the metal key and the metal keyway. This reduces vibration and wear during operation, and can withstand greater shear force and transmit torque without loosening, resulting in high connection reliability. Compared with welding and other connection methods, this arrangement makes it easier to assemble and disassemble the magnetic isolation ring structure formed by multiple lamination magnetic isolation fixing blocks and the outer periphery of the rotor hub. This convenient assembly and disassembly also greatly reduces the difficulty of the process, reduces labor consumption, saves time and effort, improves production efficiency, and lowers maintenance and repair costs, making it more economical and practical.

[0016] 4. In this invention, two first threaded holes are formed on the left and right sides of the lamination magnetic shielding fixing block along the radial direction of the rotor hub, corresponding to two internal hexagon bolts. Two second threaded holes are formed on the outer edge of the rotor hub, corresponding to the two first threaded holes. This arrangement connects the internal hexagon bolts, the first threads, and the second threaded holes through corresponding threaded connections. Because the outer wall of the internal hexagon bolt has a large contact area with the first and second threaded holes, the internal hexagon bolt can withstand greater torque when tightened. This further stabilizes the connection between the magnetic shielding ring structure formed by multiple lamination magnetic shielding fixing blocks and the outer periphery of the rotor hub. The entire installation process can be completed using only a dedicated internal hexagon wrench, requiring no special skills or complex equipment. This makes the assembly and disassembly of the magnetic shielding ring structure formed by multiple lamination magnetic shielding fixing blocks and the outer periphery of the rotor hub easier. The convenient assembly and disassembly also greatly reduces the operational difficulty of the process, reduces labor consumption, saves time and effort, and helps improve production efficiency.

[0017] 5. The inner center of the stamped magnetic shielding fixing block of the present invention is provided with a slot. This setting can improve the magnetic resistance of the leakage magnetic path, constrain the edge magnetic flux within the working area of ​​the permanent magnet, and force the magnetic flux to flow along the preset main magnetic path (such as magnet → slot → stator core), reducing leakage magnetic flux to the rotor hub and non-working areas. This can reduce local eddy current losses caused by magnetic flux distortion, and to a certain extent enhance the magnetic shielding effect and optimize the magnetic flux path. The slot is equivalent to an "elastic node" set on the inner side of the stamped magnetic shielding fixing block. When the motor starts (brakes) or the temperature changes, the stamped magnetic shielding fixing block can absorb stress (such as axial force generated by thermal expansion and contraction) through the small deformation at the slot, avoiding The design avoids cracking caused by rigid connections (especially at the contact edges between the lamination magnetic isolation fixing block and the laminations and magnets), while also reducing material usage and saving on the material cost of the lamination magnetic isolation fixing block. This reduces the rotor's moment of inertia, releases structural stress to some extent, reduces hub connection fatigue caused by excessive weight, and improves mechanical reliability. The slotted design reduces the contact area between the lamination magnetic isolation fixing block and the laminations, reducing heat conduction from the laminations to the permanent magnets (especially under high load conditions). At the same time, it allows a through airflow channel to be formed between the lamination magnetic isolation fixing block and the rotor hub, which helps to reduce local temperature rise and balance the temperature distribution in different areas of the rotor.

[0018] 6. The magnetic shielding fixing block of the present invention is arranged in a "mountain" shape. Firstly, this arrangement allows its triangular portion to precisely match the triangular groove on the punch, constructing a continuous magnetic conductive channel, reducing magnetic resistance and leakage flux in the main magnetic circuit, improving the utilization rate of the main magnetic flux, and reducing magnetic circuit losses. Secondly, the protruding portions on both sides, combined with the triangular portion, can form a multi-point mechanical lock with the punch, accurately positioning while dispersing centrifugal force and thermal stress, reducing the risk of vibration and deformation, and enhancing overall rigidity. Thirdly, the precise matching between its triangular portion and the triangular groove on the punch simplifies the installation process, reduces installation costs, facilitates quick positioning and replacement of components, and also enhances the relative locking and stability between multiple punches and multiple punch magnetic shielding fixing blocks, ensuring structural integrity during use to a certain extent, thus providing higher safety during use.

[0019] 7. The magnetic shielding fixing block of this invention is made by stretching a non-magnetic profile, such as aluminum alloy. Firstly, the non-magnetic profile has a magnetic permeability close to that of air and uniform material, effectively blocking magnetic leakage and improving magnetic circuit efficiency. Secondly, the stretching process, using a die to control the cross-section, can accurately replicate complex contours, with a length deviation of less than 0.1 mm / m, far superior to stamping or casting, ensuring the fitting accuracy between the magnetic shielding fixing block and the stamped piece, and reducing magnetic resistance fluctuations. Thirdly, it is suitable for continuous production; the single length of the magnetic shielding fixing block can reach 6-12 meters, effectively reducing the number of splicing operations, increasing material utilization, and allowing for batch production with a single die investment, effectively reducing unit costs and making it suitable for large-scale manufacturing. Fourthly, stretching refines the grains, increases tensile strength, and enhances fatigue resistance, extending service life to a certain extent. Fifthly, the magnetic shielding fixing block made from the stretched non-magnetic profile has a smooth surface requiring no secondary processing, has excellent corrosion resistance, and can be used directly, making it more practical. Attached Figure Description

[0020] Figure 1 This is a front view structural diagram of the present invention;

[0021] Figure 2 This is a partial front view schematic diagram of the structure of the present invention;

[0022] Figure 3 This is a top view of the magnetic shielding fixing block of the present invention;

[0023] Figure 4 This is a front sectional view of the magnetic shielding fixing block of the present invention.

[0024] Reference numerals: 1: Rotor hub, 2: Lamination magnetic isolation fixing block, 3: Triangular part, 4: Metal key, 5: Socket head bolt, 6: Lamination, 7: Triangular groove, 8: Placement groove, 9: Magnet, 10: Limiting groove, 11: Limiting block, 12: Outer metal keyway, 13: Inner metal keyway, 14: First threaded hole, 15: Second threaded hole, 16: Slot. Detailed Implementation

[0025] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a plurality of lamination magnetic isolation fixing blocks 2 are sequentially arranged around the periphery of the rotor hub 1. A triangular portion 3 extends outward from the center of each lamination magnetic isolation fixing block 2. The inner side of the connection between two adjacent lamination magnetic isolation fixing blocks 2 is connected and positioned to the outer edge of the rotor hub 1 via a metal key 4. Both sides of the plurality of lamination magnetic isolation fixing blocks 2 are connected to the outer edge of the rotor hub 1 via hexagonal socket head cap screws 5. Laminations 6 are correspondingly arranged on the outer edge of the lamination magnetic isolation fixing blocks 2. A triangular groove 7 is formed on the inner side of the lamination 6 corresponding to the triangular portion 3. A placement groove 8 is formed between two adjacent laminations 6, and a magnet 9 is correspondingly placed in the placement groove 8. The triangular groove 7 is a magnetic circuit design structure. Compared to traditional straight-slot or diamond-shaped slot designs, its three-phase magnetic circuit is completely symmetrical and of equal length, with a more uniform magnetic reluctance distribution. This reduces losses and unbalanced magnetic pull, lowers vibration and noise, and the strong triangular stability results in higher overall strength of the lamination 6, making it less prone to deformation under external forces. This improves the overall reliability and lifespan of the motor to a certain extent. The winding arrangement is more optimized, with a high slot fill factor, which is beneficial for improving output power and efficiency. The regular shape of the triangular slot 7 makes it easier to manufacture, reducing processing steps and time, and lowering processing costs. In addition, the relatively simple structure of the triangular slot 7 facilitates the flow of cooling media (such as air), improving the cooling effect to a certain extent. This design removes the iron core of the original one-piece rotor lamination. The structure is divided into a single-tooth configuration, consisting of laminations 6 and lamination magnetic isolation fixing blocks 2. Multiple lamination magnetic isolation fixing blocks 2 are sequentially connected and fixed to the outer periphery of the rotor hub 1 using hexagonal socket bolts 5. Then, metal keys 4 are placed into the metal keyways formed between the bottom of two adjacent lamination magnetic isolation fixing blocks 2 and the top of the outer periphery of the rotor hub 1. Multiple laminations 6 are then installed by engaging their triangular slots 7 with the triangular portions 3 on the multiple lamination magnetic isolation fixing blocks 2. After the multiple laminations 6 are installed, magnets 9 are inserted into the multiple placement slots 8 formed between multiple sets of adjacent laminations 6, corresponding to the axial direction of the rotor hub 1. Compared to the traditional large-diameter direct-drive permanent magnet synchronous magnetic isolation locking structure, this large-diameter direct-drive permanent magnet synchronous magnetic isolation... The magnetic locking structure adopts a single-tooth structure and distributed installation, which is convenient to install and greatly reduces the difficulty of operation, reduces labor consumption, and saves more time and effort. At the same time, it can save the amount of expensive permanent magnets, save energy, and also significantly reduce material and manufacturing costs, which is conducive to improving production efficiency. In addition, the locking is formed by the cooperation between the triangular groove 7 on the lamination 6 and the triangular part 3 on the lamination magnetic isolation fixing block 2. Compared with the traditional installation method between the single-tooth lamination 6 and the lamination magnetic isolation fixing block 2, this installation method makes the structure of the entire rotor magnetic circuit more compact and makes the entire rotor tooth magnetic circuit more stable during use, reducing safety hazards during use to a certain extent.

[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the left and right ends of the stamping magnetic shielding fixing block 2 are respectively provided with limiting grooves 10 and limiting blocks 11. The adjacent two stamping magnetic shielding fixing blocks 2 are connected by corresponding engagement of the limiting grooves 10 and limiting blocks 11. This setting facilitates the quick positioning and installation of adjacent two stamping magnetic shielding fixing blocks 2 through the engagement positioning between the limiting grooves 10 and limiting blocks 11. The installation is convenient and also greatly reduces the difficulty of the process, reduces labor consumption, saves more time and effort, and helps to improve production efficiency.

[0030] like Figure 1 , Figure 2 and Figure 4 As shown, an outer metal keyway 12 is provided on the outer half of the metal key 4 (the half away from the center of the rotor hub 1) at the connection point of two adjacent lamination magnetic isolation fixing blocks 2. An inner metal keyway 13 is provided on the outer edge of the rotor hub 1 corresponding to the outer metal keyway 12. The outer metal keyway 12 and the inner metal keyway 13 together form a metal keyway for placing the metal key 4. This arrangement ensures that the magnetic isolation ring structure formed by multiple lamination magnetic isolation fixing blocks 2 is precisely aligned with the outer edge of the rotor hub 1 by corresponding and tightly fitting the metal key 4. This reduces vibration and wear during operation, and can withstand large shear forces and transmit torque. It is not easy to loosen and has high connection reliability. Compared with welding and other connection methods, it makes it easier to disassemble and assemble the magnetic isolation ring structure formed by multiple lamination magnetic isolation fixing blocks 2 with the outer edge of the rotor hub 1. The ease of disassembly and assembly also greatly reduces the difficulty of the process operation, reduces labor consumption, saves more time and effort, helps to improve production efficiency, and has lower maintenance and repair costs, making it more economical and practical.

[0031] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, two first threaded holes 14 are formed on the left and right sides of the lamination magnetic shielding fixing block 2 along the radial direction of the rotor hub 1, corresponding to two internal hexagon bolts 5. Two second threaded holes 15 are formed on the outer edge of the rotor hub 1, corresponding to the two first threaded holes 14. This arrangement connects the internal hexagon bolts 5, the first threaded holes 14, and the second threaded holes 15 with corresponding threaded connections. Because the outer wall of the internal hexagon bolts 5 has a large contact area with the first threaded holes 14 and the second threaded holes 15, the internal hexagon bolts 5 can withstand greater torque when tightened, thereby further stabilizing the connection between the magnetic shielding ring structure formed by the multiple lamination magnetic shielding fixing blocks 2 and the outer periphery of the rotor hub 1. The entire installation process can be completed using only a special internal hexagon wrench, without special skills or complex equipment. This makes the disassembly and assembly of the magnetic shielding ring structure formed by the multiple lamination magnetic shielding fixing blocks 2 and the outer periphery of the rotor hub 1 easier. The convenient disassembly and assembly also greatly reduces the difficulty of the process, reduces labor consumption, saves time and effort, and helps improve production efficiency.

[0032] like Figure 1 , Figure 2 and Figure 4 As shown, a slot 16 is provided in the middle of the inner side of the lamination magnetic isolation fixing block 2. This setting can increase the magnetic resistance of the leakage magnetic path, constrain the edge magnetic flux in the working area of ​​the permanent magnet, and force the magnetic flux to flow along the preset main magnetic path (such as magnet 9 → slot 16 → stator core), reducing the leakage magnetic flux to the rotor hub 1 and non-working area. It can reduce the local eddy current loss caused by magnetic flux distortion, and to a certain extent enhance the magnetic isolation effect and optimize the magnetic flux path. The slot 16 is equivalent to an "elastic node" set in the inner side of the lamination magnetic isolation fixing block 2. When the motor starts (brakes) or the temperature changes, the lamination magnetic isolation fixing block 2 can absorb stress (such as the axial force generated by thermal expansion and contraction) through the small deformation at the slot 16, avoiding The rigid connection prevents cracking (especially at the contact edges between the lamination magnetic isolation fixing block 2 and the lamination 6 and magnet 9), while reducing material usage and saving material costs for the lamination magnetic isolation fixing block 2. It also reduces the rotor's rotational inertia, releases structural stress to a certain extent, reduces hub connection fatigue caused by excessive weight, and improves mechanical reliability. The slot 16 reduces the contact area between the lamination magnetic isolation fixing block 2 and the lamination 6, reducing heat conduction from the lamination 6 to the permanent magnet (especially under high load conditions). At the same time, it allows a through airflow channel to be formed between the lamination magnetic isolation fixing block 2 and the rotor hub 1, which helps to reduce local temperature rise and balance the temperature distribution in different areas of the rotor.

[0033] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the stamped magnetic isolation fixing block 2 is arranged in a "mountain" shape. Firstly, this arrangement allows its triangular portion 3 to precisely engage with the triangular groove 7 on the stamped piece 6, creating a continuous magnetic conductive channel. This reduces magnetic resistance and leakage flux in the main magnetic circuit, improves the utilization rate of the main magnetic flux, and reduces magnetic circuit losses. Secondly, the protruding portions on both sides, combined with the triangular portion 3, form a multi-point mechanical lock with the stamped piece 6. This precise positioning disperses centrifugal force and thermal stress, reducing the risk of vibration and deformation and enhancing overall rigidity. Thirdly, the precise engagement between its triangular portion 3 and the triangular groove 7 on the stamped piece 6 simplifies the installation process, reduces installation costs, facilitates quick component replacement, and enhances the relative locking and stability between multiple stamped pieces 6 and multiple stamped magnetic isolation fixing blocks 2. This ensures structural integrity during use to a certain extent, thereby providing higher safety during operation.

[0034] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the stamped magnetic shielding fixing block 2 is made of non-magnetic profile stretched from a non-magnetic material, such as aluminum alloy. This design offers several advantages: First, the non-magnetic profile has a magnetic permeability close to that of air and uniform material properties, effectively blocking magnetic leakage and improving magnetic circuit efficiency. Second, the stretching process, using a die to control the cross-section, can accurately replicate complex contours, with a length deviation of less than 0.1 mm / m, far superior to stamping or casting. This ensures the fitting accuracy between the stamped magnetic shielding fixing block 2 and the stamped piece 6, reducing magnetic resistance fluctuations. Third, it is suitable for continuous production; the single length of the stamped magnetic shielding fixing block 2 can reach 6-12 meters, effectively reducing the number of splicing operations, increasing material utilization, and allowing for batch production with a single die investment, effectively reducing unit costs and making it suitable for large-scale manufacturing. Fourth, stretching refines the grains, increases tensile strength, and enhances fatigue resistance, extending service life to some extent. Fifth, the stamped magnetic shielding fixing block 2, made from a non-magnetic profile, has a smooth surface requiring no secondary processing, exhibits excellent corrosion resistance, and can be used directly, making it more practical.

[0035] The specific operating principle is as follows:

[0036] Step 1: Through the corresponding threaded connections between multiple sets of first threaded holes, internal hex bolts and second threaded holes, multiple lamination magnetic isolation fixing blocks are sequentially connected and fixed around the outer periphery of the rotor hub, wherein adjacent lamination magnetic isolation fixing blocks are positioned by limiting grooves and limiting blocks.

[0037] Step 2: Place multiple metal keys into multiple metal keyways formed by the bottom of two adjacent lamination magnetic isolation fixing blocks and the top of the outer periphery of the rotor hub;

[0038] Step 3: Install multiple laminations by engaging their triangular slots with the triangular portions on multiple lamination magnetic shielding fixing blocks, and make a mutual locking between a single set of laminations and the lamination magnetic shielding fixing blocks;

[0039] Step 4: After multiple laminations are installed, magnets are inserted into the multiple placement slots formed between multiple sets of adjacent laminations, corresponding to the direction of the rotor hub axis. After installation, the magnets are clamped and secured by the end faces of the two adjacent laminations on opposite sides.

[0040] The components provided in this invention are only for use in accordance with the structural features of the product. The product will be adjusted and modified after purchase to better match and conform to the technical solution of this invention. It is an optimal application of this technical solution. The product model can be replaced and modified according to the required technical parameters. It is well known to those skilled in the art. Therefore, those skilled in the art can clearly obtain the corresponding usage effect through the technical solution provided in this invention.

[0041] In addition, during the use of this magnetic isolation locking structure, staff should perform regular maintenance, inspection, cleaning and upkeep, and replace each component regularly according to its service life to ensure that the magnetic isolation locking structure is always kept in optimal working condition.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A large-diameter direct-drive permanent magnet synchronous field isolation locking structure, characterized in that, The device includes a rotor hub, around which a plurality of lamination magnetic shielding fixing blocks are sequentially arranged. A triangular portion extends outward from the center of each of the lamination magnetic shielding fixing blocks. The inner sides of the connection points between adjacent lamination magnetic shielding fixing blocks are connected and positioned to the outer edge of the rotor hub via metal keys. Both sides of the lamination magnetic shielding fixing blocks are connected to the outer edge of the rotor hub via hexagonal socket head cap screws. Laminations are correspondingly arranged on the outer edge of each lamination magnetic shielding fixing block. A triangular groove is formed on the inner side of each lamination corresponding to the triangular portion. A placement groove is formed between adjacent laminations, and a magnet is correspondingly placed within the placement groove. The lamination magnetic shielding fixing blocks are formed by stretching non-magnetic profiles.

2. The large diameter direct drive permanent magnet synchronous field isolation locking structure according to claim 1, characterized in that, The left and right ends of the stamping magnetic shielding fixing block are respectively provided with a limiting groove and a limiting block, and two adjacent stamping magnetic shielding fixing blocks are connected by the corresponding engagement of the limiting groove and the limiting block.

3. The large-diameter direct-drive permanent magnet synchronous magnetic isolation locking structure according to claim 1, characterized in that, An outer metal keyway is provided on the inner side of the connection between two adjacent lamination magnetic isolation fixing blocks, corresponding to the outer half of the outer periphery of the metal key, and an inner metal keyway is provided on the outer edge of the rotor hub, corresponding to the outer metal keyway.

4. The large-diameter direct-drive permanent magnet synchronous magnetic isolation locking structure according to claim 1, characterized in that, The left and right sides of the lamination magnetic isolation fixing block have two first threaded holes through the two internal hexagon bolts along the radial direction of the rotor hub, and the outer edge of the rotor hub has two second threaded holes corresponding to the two first threaded holes.

5. The large-diameter direct-drive permanent magnet synchronous magnetic isolation locking structure according to claim 1, characterized in that, A slot is provided in the middle of the inner side of the punched magnetic shielding fixing block.

6. The large-diameter direct-drive permanent magnet synchronous magnetic isolation locking structure according to claim 1, characterized in that, The stamped magnetic isolation fixing block is arranged in a "mountain" shape.

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