Permanent magnet synchronous motor rotor structure

Abstract

The utility model relates to the field of permanent magnet synchronous motors, and discloses a rotor structure of a permanent magnet synchronous motor. According to the rotor disc, the threaded grooves are used for providing positions for series connection of the screws, the screws penetrate through the interiors of the threaded grooves and are used for connecting the rotor discs in series, so that the risk that parts are loosened in the operation process is reduced, the stability in the operation process is improved, the two ends of the screws can be tightly attached to the positions where the threaded grooves are formed through the nuts, and the service life of the rotor disc is prolonged. According to the utility model, the threaded groove can be fixed in the rotor disc, and the assembly used for fixedly connecting the rotors together is installed on the structure, so that the rotor disc assembly is prevented from loosening during operation under the condition that the rotors rotate at a high speed, and the overall reliability of the motor is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of permanent magnet synchronous motors, and specifically relates to a permanent magnet synchronous motor rotor structure. Background Art

[0002] Permanent magnet synchronous motors use permanent magnets to provide excitation, making the motor structure simpler, reducing processing and assembly costs, and eliminating collector rings and brushes that are prone to problems, improving the reliability of motor operation; and because no excitation current is required, there is no excitation loss, which improves the efficiency and power density of the motor. Permanent magnet synchronous motors are composed of stators, rotors, and end covers.

[0003] For example, a permanent magnet synchronous motor rotor structure is disclosed in the patent with announcement number CN217984712U, including a fixed shaft, a fixed ring is provided on the outer side of the fixed shaft, and a limiting boss is fixedly installed at an equal angle on the outer side of the fixed ring, and a coil installation groove is formed between each two limiting bosses, and a thread groove is opened at an equal angle on the front and back sides of the fixed ring. The utility model rotates the clamping plate so that the clamping plate is located on the outer side of the coil until it contacts the coil to lock the end face of the coil, and at the same time, the elastic sheet can be installed between the two limiting bosses by clamping and fixing the clamping block with the clamping groove between the two limiting bosses. At this time, the inner side of the elastic sheet can contact the outer side of the coil and produce a certain deformation to press the coil, thereby limiting and blocking the outer side of the coil. The blocking of the end face and the side face can effectively prevent the coil from falling off due to centrifugal force, and effectively improve the service life of the motor.

[0004] However, the structure does not have components installed to securely connect the rotors together. When the rotors rotate at high speeds, the rotor disk components may become loose during operation, resulting in a decrease in the overall reliability of the motor. Utility Model Content

[0005] The purpose of the present application is to provide a permanent magnet synchronous motor rotor structure in order to solve the problem that the above-mentioned structure does not have components installed to fix the rotors together, and when the rotor rotates at high speed, the rotor disk components may become loose during operation, resulting in a decrease in the overall reliability of the motor.

[0006] The technical solution adopted in the present application is as follows: it includes a driving shaft, a plurality of rotor disks are fixedly installed on the middle outer surface of the driving shaft, a plurality of rotor bodies are fixedly installed inside the rotor disks, a partition plate is fixedly installed between the plurality of rotor bodies, a plurality of thread grooves are provided inside the rotor disks, a screw is installed through the inside of the thread grooves, and nuts are fixedly installed on the front and rear outer surfaces of the screw.

[0007] By adopting the above technical solution, multiple rotor disks are fixedly installed on the middle outer surface of the drive shaft, multiple rotor bodies are fixedly installed inside the rotor disk, partition plates are fixedly installed between the multiple rotor bodies, multiple thread grooves are opened inside the rotor disk, screws are installed through the inside of the thread grooves, nuts are fixedly installed on the front and rear outer surfaces of the screws, the drive shaft serves as the installation basis of the structure, and its function is to transmit torque and support the rotor, the inside of the rotor disk is used to accommodate multiple rotor bodies through the installation position, and the number of rotor bodies is increased by combining multiple rotor disks, and the rotor body is made of neodymium iron boron, and its function is to provide a constant magnetic field, which interacts with the rotating magnetic field generated by the external stator, thereby realizing electric The partition plate can separate the rotor bodies from each other to reduce the magnetic field interference between adjacent rotor bodies. The thread groove can provide a position for the series connection of the screw. The screw runs through the inside of the thread groove to connect the rotor disks in series, thereby reducing the risk of loosening of parts during operation and improving the stability during operation. The nut can fit the two ends of the screw tightly together with the position where the thread groove is opened, so that the thread groove can be fixed inside the rotor disk. By installing components for fixing the rotors together on the structure, loosening of the rotor disk components can be avoided during operation when the rotor rotates at high speed, thereby improving the overall reliability of the motor.

[0008] In a preferred embodiment, a bottom plate is mounted on the rear outer surface of the rotor disk, and a top plate is mounted on the front outer surface of the rotor disk.

[0009] By adopting the above technical solution, the rear outer surface of the rotor disk is fitted with a bottom plate, and the front outer surface of the rotor disk is fitted with a top plate. The combination of the bottom plate and the top plate can prevent the outer surface of the rotor disk from being affected by the external environment.

[0010] In a preferred embodiment, a protective cover is fixedly installed between the same inner surface of the bottom plate and the top plate.

[0011] By adopting the above technical solution, a protective cover is fixedly installed between the same inner surface of the bottom plate and the top plate, and the outer surface of the protective cover is used to wrap the outer surface of the rotor disk inside the bottom plate and the top plate, thereby protecting the rotor body on the upper surface of the rotor disk.

[0012] In a preferred embodiment, bearings are fixedly mounted on the outer surfaces of the front and rear ends of the drive shaft.

[0013] By adopting the above technical solution, bearings are fixedly installed on the outer surfaces of the front and rear ends of the drive shaft. The bearings are used to keep the rotation of the drive shaft unrestricted when the drive shaft passes through the outer casing of the external motor.

[0014] In a preferred embodiment, a rubber pad is fixedly mounted on the front outer surface of the top plate.

[0015] By adopting the above technical solution, a rubber pad is fixedly installed on the front outer surface of the top plate. The rubber pad has good elasticity and buffering performance, and can effectively absorb and reduce the vibration transmitted to the protective cover by the components on its front outer surface.

[0016] In a preferred embodiment, a fan blade is fixedly mounted on the front outer surface of the rubber pad, and a rectifier block is fixedly mounted on the front outer surface of the fan blade.

[0017] By adopting the above technical solution, the fan blades are fixedly installed on the front outer surface of the rubber pad, and the rectifier block is fixedly installed on the front outer surface of the fan blades. When the rotor rotates, the fan blades can accelerate the circulation of air through their own rotation, which is used to dissipate heat for the outer surface of the structure. The rectifier block is used to assist in rectifying the direction of wind blowing toward the fan blades, thereby guiding the flow of air.

[0018] In a preferred embodiment, a balancing block is fixedly mounted on the front outer surface of the rectifier block.

[0019] By adopting the above technical solution, a balancing block is fixedly installed on the front outer surface of the rectifier block. The balancing block can ensure the dynamic balance of the drive shaft when rotating at high speed, thereby extending the service life of the motor.

[0020] In a preferred embodiment, a docking block is provided inside the front outer surface of the balancing weight.

[0021] By adopting the above technical solution, a docking block is provided inside the front outer surface of the balancing block, and the docking block can provide a docking interface for connecting the motor rotor and the mechanical load, so that the motor rotor and the mechanical load are fixedly connected together.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:

[0023] In the present application, a thread groove can be used to provide a position for the series connection of the screw rod, and the screw rod passes through the interior of the thread groove to connect the various rotor disks in series, thereby reducing the risk of loosening of components during operation and improving stability during operation. The nut can tightly fit the two ends of the screw rod with the position where the thread groove is opened, so that the thread groove can be fixed inside the rotor disk. By installing components for fixing the rotors together on this structure, loosening of the rotor disk components during operation can be avoided when the rotor rotates at high speed, thereby improving the overall reliability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1This is a schematic diagram of the front three-dimensional structure of a permanent magnet synchronous motor rotor structure in the present application;

[0025] Figure 2 It is a schematic diagram of the upper surface structure in this application;

[0026] Figure 3 It is a schematic diagram of the front three-dimensional structure in this application;

[0027] Figure 4 This is a schematic diagram of the rotor disk assembly structure in this application.

[0028] Markings in the figure: 1. Drive shaft; 2. Rotor disk; 3. Rotor body; 4. Partition plate; 5. Thread groove; 6. Screw; 7. Nut; 8. Bottom plate; 9. Top plate; 10. Protective cover; 11. Bearing; 12. Rubber pad; 13. Fan blade; 14. Rectifier block; 15. Balance block; 16. Docking block. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] Example:

[0031] Reference Figure 1 , Figure 3 and Figure 4, including a driving shaft 1, a plurality of rotor disks 2 are fixedly installed on the middle outer surface of the driving shaft 1, a plurality of rotor bodies 3 are fixedly installed inside the rotor disk 2, a partition plate 4 is fixedly installed between the plurality of rotor bodies 3, a plurality of thread grooves 5 are provided inside the rotor disk 2, a screw 6 is installed through the inside of the thread groove 5, a nut 7 is fixedly installed on the front and rear outer surfaces of the screw 6, the driving shaft 1 is used as the installation base of the structure, and its function is to transmit torque and support the rotor, the inside of the rotor disk 2 is used to accommodate the plurality of rotor bodies 3 through the installation position, and the number of rotor bodies 3 is increased by the combination of a plurality of rotor disks 2, the rotor body 3 is made of neodymium iron boron, and its function is to provide a constant magnetic field, and interact with the rotating magnetic field generated by the external stator, so as to achieve As the motor rotates, the partition plate 4 can separate the rotor bodies 3 to reduce the magnetic field interference between adjacent rotor bodies 3. The thread groove 5 can provide a position for the series connection of the screw rod 6. The screw rod 6 runs through the inside of the thread groove 5 to connect the rotor disks 2 in series, thereby reducing the risk of loosening of components during operation and improving the stability during operation. The nut 7 can tightly fit the two ends of the screw rod 6 with the position where the thread groove 5 is opened, so that the thread groove 5 can be fixed inside the rotor disk 2. By installing components for fixing the rotors together in the structure, loosening of the rotor disk components during operation can be avoided when the rotor rotates at high speed, thereby improving the overall reliability of the motor.

[0032] Reference Figure 1-Figure 3 The rear outer surface of the rotor disk 2 is fitted with a bottom plate 8, and the front outer surface of the rotor disk 2 is fitted with a top plate 9. The combination of the bottom plate 8 and the top plate 9 can prevent the outer surface of the rotor disk 2 from being affected by the external environment.

[0033] Reference Figure 1 and Figure 2 A protective cover 10 is fixedly installed between the same inner surface of the bottom plate 8 and the top plate 9. The outer surface of the protective cover 10 is used to wrap the outer surface of the rotor disk 2 inside the bottom plate 8 and the top plate 9, thereby protecting the rotor body 3 on the upper surface of the rotor disk 2.

[0034] Reference Figure 1-Figure 3 The outer surfaces of the front and rear ends of the driving shaft 1 are fixedly mounted with bearings 11, and the bearings 11 are used to keep the rotation of the driving shaft 1 unrestricted when the driving shaft 1 passes through the outer casing of the external motor.

[0035] Reference Figure 1 A rubber pad 12 is fixedly installed on the front outer surface of the top plate 9. The rubber pad 12 has good elasticity and buffering performance, and can effectively absorb and reduce the vibration transmitted to the protective cover 10 by the components on its front outer surface.

[0036] Reference Figure 1The fan blades 13 are fixedly installed on the front outer surface of the rubber pad 12, and the rectifier block 14 is fixedly installed on the front outer surface of the fan blades 13. When the rotor rotates, the fan blades 13 can accelerate the circulation of air by their own rotation, which is used to dissipate heat for the outer surface of the structure. The rectifier block 14 is used to assist in rectifying the direction of the wind blowing toward the fan blades 13, thereby guiding the flow of air.

[0037] Reference Figure 1 and Figure 2 A balancing block 15 is fixedly mounted on the front outer surface of the rectifier block 14. The balancing block 15 can ensure the dynamic balance of the drive shaft 1 when rotating at high speed, thereby extending the service life of the motor.

[0038] Reference Figure 1 A docking block 16 is provided inside the front outer surface of the balancing block 15. The docking block 16 can provide a docking interface for connecting the motor rotor and the mechanical load, so that the motor rotor and the mechanical load are fixedly connected together.

[0039] The implementation principle of a permanent magnet synchronous motor rotor structure embodiment of the present application is:

[0040] The drive shaft 1 serves as the installation base of the structure, and its function is to transmit torque and support the rotor. The interior of the rotor disk 2 is used to accommodate multiple rotor bodies 3 through installation positions, and the number of rotor bodies 3 is increased by combining multiple rotor disks 2. The rotor body 3 is made of neodymium iron boron, and its function is to provide a constant magnetic field, interact with the rotating magnetic field generated by the external stator, so as to realize the rotation of the motor. The partition plate 4 can separate each rotor body 3 to reduce the magnetic field interference between adjacent rotor bodies 3. The thread groove 5 can provide a position for the series connection of the screw rod 6, and the screw rod 6 runs through the interior of the thread groove 5 to connect each rotor disk 2 in series, thereby reducing the risk of loosening of components during operation and improving stability during operation. The nut 7 can fit the two ends of the screw rod 6 tightly with the position where the thread groove 5 is opened, so that the thread groove 5 can be fixed inside the rotor disk 2.

[0041] A combination of a bottom plate 8 and a top plate 9 is adopted, and the combination of the two can prevent the outer surface of the rotor disk 2 from being affected by the external environment. The outer surface of the protective cover 10 is used to wrap the outer surface of the rotor disk 2 inside the bottom plate 8 and the top plate 9, thereby protecting the rotor body 3 on the upper surface of the rotor disk 2. The docking block 16 can provide a docking interface for the connection between the motor rotor and the mechanical load, so that the motor rotor and the mechanical load are fixedly connected together.

[0042] By installing components for fixing the rotors together in the structure, looseness between the rotor disk components during operation can be avoided when the rotors rotate at high speed, thereby improving the overall reliability of the motor.

[0043] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A permanent magnet synchronous motor rotor structure, comprising a drive shaft (1), characterized in that: A plurality of rotor disks (2) are fixedly mounted on the middle outer surface of the drive shaft (1), a plurality of rotor bodies (3) are fixedly mounted inside the rotor disk (2), a partition plate (4) is fixedly mounted between the plurality of rotor bodies (3), a plurality of thread grooves (5) are provided inside the rotor disk (2), a screw rod (6) is installed through the inside of the thread groove (5), and nuts (7) are fixedly mounted on the front and rear outer surfaces of the screw rod (6).

2. A permanent magnet synchronous motor rotor structure as claimed in claim 1, characterized in that: A bottom plate (8) is fitted on the rear outer surface of the rotor disk (2), and a top plate (9) is fitted on the front outer surface of the rotor disk (2).

3. A permanent magnet synchronous motor rotor structure as claimed in claim 2, characterized in that: A protective cover (10) is fixedly installed between the same inner surface of the bottom plate (8) and the top plate (9).

4. A permanent magnet synchronous motor rotor structure as claimed in claim 1, characterized in that: Bearings (11) are fixedly mounted on the outer surfaces of the front and rear ends of the drive shaft (1).

5. A permanent magnet synchronous motor rotor structure as claimed in claim 3, characterized in that: A rubber pad (12) is fixedly mounted on the front outer surface of the top plate (9).

6. A permanent magnet synchronous motor rotor structure as claimed in claim 5, characterized in that: A fan blade (13) is fixedly mounted on the front outer surface of the rubber pad (12), and a rectifier block (14) is fixedly mounted on the front outer surface of the fan blade (13).

7. A permanent magnet synchronous motor rotor structure as claimed in claim 6, characterized in that: A balancing block (15) is fixedly mounted on the front outer surface of the rectifying block (14).

8. A permanent magnet synchronous motor rotor structure as claimed in claim 7, characterized in that: A docking block (16) is provided inside the front outer surface of the balancing block (15).

Images