High-voltage permanent magnet motor rotor

Abstract

The utility model relates to a high-voltage permanent magnet motor rotor. The device comprises a rotating shaft, the iron core comprises a plurality of segmented iron cores, and the segmented iron cores are distributed in the axial direction of the rotating shaft; a plurality of ventilation slot plates with spacers, each ventilation slot plate with spacers is installed on the rotating shaft and located between two adjacent segmented iron cores, and each ventilation slot plate with spacers comprises a ventilation slot plate and a plurality of spacers distributed and installed in the circumferential direction of the ventilation slot plate; each limiting plate is mounted on one side, close to the corresponding spacer, of the corresponding rotating shaft; wherein each limiting plate and the corresponding ventilation slot plate with the spacer form a plurality of radial ventilation ducts, and each radial ventilation duct is located between every two adjacent spacers. According to the utility model, the heat dissipation capability of the rotor can be improved, high-temperature demagnetization of the magnetic steel is avoided, the number of parts is reduced by designing the ventilation slot plates with the spacers and the limiting plates, and the manufacturing difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a high-voltage permanent magnet motor rotor. Background Art

[0002] At present, electric motors are one of the main power sources in industry, accounting for about 75% of the total industrial electricity consumption each year. In order to comply with carbon neutrality requirements, it is urgent to improve the efficiency and power factor of electric motors. Traditional asynchronous motors have low efficiency and power factor, resulting in a large amount of energy waste. In order to improve this problem, permanent magnet motors have gradually replaced asynchronous motors. At present, low-voltage permanent magnet motors have been widely used in industries such as fans and water pumps, but there is still a demand for high-power high-voltage permanent magnet motor products in the market.

[0003] Traditional high-voltage permanent magnet motors have the following problems: the rotor has no radial ventilation ducts, resulting in poor heat dissipation performance and the permanent magnets are easily demagnetized at high temperatures. Although rotors with radial ventilation ducts solve these problems, they are complex in structure and difficult to manufacture. Summary of the invention

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problems of poor heat dissipation performance of the rotor and complex structure leading to manufacturing difficulties in the prior art.

[0005] In order to solve the above technical problems, the utility model provides a high voltage permanent magnet motor rotor, comprising:

[0006] Rotating shaft;

[0007] An iron core, comprising a plurality of segmented iron cores, each of the segmented iron cores being distributed along the axial direction of the rotating shaft;

[0008] A plurality of ventilation slot plates with spacers, each of which is installed on the rotating shaft and located between two adjacent segmented cores, and each of which comprises a ventilation slot plate and a plurality of spacers distributed and installed around the ventilation slot plate;

[0009] A plurality of limit plates, each of which is mounted on one side of the rotating shaft and close to the spacer;

[0010] Wherein, each of the limiting plates and the corresponding ventilation slot plate with spacers form a plurality of radial ventilation passages, and each of the radial ventilation passages is located between two adjacent spacers.

[0011] In one embodiment of the utility model, the segmented core includes a plurality of rivets and a plurality of rotor punchings, and through holes are distributed on the surface of each of the rotor punchings. The plurality of rotor punchings are riveted together through the rivets and the through holes.

[0012] In one embodiment of the present invention, a plurality of magnetic steels are further included. The surface of the rotor punching sheet is provided with magnetic steel grooves. The magnetic steels are installed in the magnetic steel grooves one by one to form a segmented core with magnetic steels.

[0013] In one embodiment of the utility model, slot holes are distributed on the surface of the ventilation slot plate, and the spacers are embedded in the slot holes. A plurality of the spacers extend radially along the ventilation slot plate and are evenly distributed circumferentially on the surface of the ventilation slot plate. A gap is left between the spacers and the edge of the center hole of the ventilation slot plate, and each of the spacers has a guide slope near the center hole of the ventilation slot plate.

[0014] In one embodiment of the utility model, it also includes a rotor end plate, wherein two rotor end plates are provided and are respectively located at the axial ends of the iron core, and the rotor punching sheets, the ventilation slot plates, the limit plates and the rotor end plates are correspondingly provided with a plurality of axial ventilation holes.

[0015] In one implementation of the present invention, a plurality of threaded holes are circumferentially distributed on the rotor end plate.

[0016] In one implementation of the present utility model, the ventilation slot plate, the limiting plate and the rotor end plate are all non-magnetic components.

[0017] In one embodiment of the present invention, a rotor pressing ring is further included, and the rotor pressing ring is pressed against the outer end surface of the rotor end plate along the axial direction of the rotating shaft.

[0018] In one embodiment of the utility model, a screw rod is further included, and the rotor punching sheet, the ventilation slot plate, the limit plate and the rotor end plate are correspondingly provided with a plurality of fastening holes, and the screw rod passes through the fastening holes one by one.

[0019] In an implementation manner of the present utility model, the ventilation slot plate, the limiting plate and the rotor end plate are each provided with a plurality of avoidance holes for avoiding the rivets.

[0020] The above technical solution of the utility model has the following advantages compared with the prior art:

[0021] The utility model discloses a high-voltage permanent magnet motor rotor, which improves the heat dissipation capacity of the rotor and avoids high-temperature demagnetization of the magnetic steel by adding multiple radial ventilation channels and axial ventilation holes between the segmented cores. The number of parts is simplified and the manufacturing difficulty is reduced by designing a ventilation slot plate with spacers and a limit plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0023] Figure 1 A schematic diagram of a high-voltage permanent magnet motor rotor structure provided in an embodiment of the utility model.

[0024] Figure 2 Schematic diagram of the segmented core structure.

[0025] Figure 3 This is a schematic diagram of the rotor punching structure.

[0026] Figure 4 Schematic diagram of the structure of the segmented core with magnetic steel.

[0027] Figure 5 This is a schematic diagram of the structure of the ventilation slot plate with spacers.

[0028] Figure 6 It is a schematic diagram of the main structure of the diaphragm structure.

[0029] Figure 7 It is a schematic diagram of the top view of the spacer structure.

[0030] Figure 8 Schematic diagram of the ventilation slot plate structure.

[0031] Fig. 9 It is a schematic diagram of the limiting plate structure.

[0032] Fig.10 This is a schematic diagram of the main structure of the rotor end plate.

[0033] Fig.11 It is a schematic diagram of the cross-sectional structure of the rotor end plate.

[0034] Description of the Figures in the Specification:

[0035] 1. Rotating shaft; 2. Segmented core; 3. Ventilation slot plate with spacer; 4. Limit plate; 5. Magnet; 6. Screw; 7. Rotor end plate; 8. Rotor pressure ring; 9. Rivet; 10. Rotor punching plate; 11. Ventilation slot plate; 12. Spacer; 13. Slot hole; 14. Magnet slot; 15. Through hole; 16. Axial ventilation hole; 17. Avoidance hole; 18. Threaded hole; 19. Radial ventilation duct; 20. Fastening hole; 21. Segmented core with magnet. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0037] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0038] In the present utility model, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of the present utility model, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected or electrically connected or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0040] Reference Figure 1 As shown, a high-voltage permanent magnet motor rotor comprises:

[0041] Shaft 1;

[0042] An iron core, comprising a plurality of segmented iron cores 2, each of the segmented iron cores 2 being distributed along the axial direction of the rotating shaft 1;

[0043] A plurality of ventilation slot plates 3 with spacers, each of which is installed on the rotating shaft 1 and located between two adjacent segmented cores 2, and each of which comprises a ventilation slot plate 11 and a plurality of spacers 12 distributed and installed around the ventilation slot plate 11;

[0044] A plurality of limiting plates 4, each limiting plate 4 being installed on one side of the rotating shaft 1 and close to the spacer 12;

[0045] Each of the limiting plates 4 and the corresponding ventilation slot plate 3 with spacers form a plurality of radial ventilation passages 19 , and each of the radial ventilation passages 19 is located between two adjacent spacers 12 .

[0046] Through the above arrangement, the ventilation slot plate with spacers 3 and the limiting plate 4 form a radial ventilation duct 19, which not only provides axial limiting for the magnetic steel 5, but also improves the heat dissipation performance of the high-voltage permanent magnet motor rotor.

[0047] In some embodiments, reference Figure 2 , Figure 3 As shown, the segmented core 2 includes a plurality of rivets 9 and a plurality of rotor punchings 10 . A through hole 15 is distributed on the surface of each rotor punching 10 . The plurality of rotor punchings 10 are riveted together through the rivets 9 and the through holes 15 .

[0048] Reference Figure 4 As shown, it also includes a plurality of magnetic steels 5 , and magnetic steel slots 14 are distributed on the surface of the rotor punching sheet 10 . The magnetic steels 5 are installed in the magnetic steel slots 14 one by one to form a segmented core 21 with magnetic steel.

[0049] The rotor punching sheets 10 are stacked and fastened by rivets 9 penetrating through the through holes 15. The magnetic steel 5 is glued and assembled into the magnetic steel slot 14 to form a magnetic steel segmented core 21.

[0050] In some embodiments, reference Figures 5 to 7 As shown, the surface of the ventilation slot plate 11 is distributed with slot holes 13, and the spacers 12 are embedded in the slot holes 13. A plurality of the spacers 12 extend radially along the ventilation slot plate 11 and are evenly distributed circumferentially on the surface of the ventilation slot plate 11, and a certain gap is left between the spacers 12 and the edge of the center hole of the ventilation slot plate 11. In addition, each of the spacers 12 has a guiding inclined surface near the center hole of the ventilation slot plate 11 to enhance ventilation performance.

[0051] In some embodiments, reference Fig.10 , Fig.11 As shown, it also includes a rotor end plate 7, two of which are provided and are respectively located at the axial ends of the iron core, the rotor punching 10, the ventilation slot plate 11, the limit plate 4 and the rotor end plate 7 are correspondingly provided with a plurality of axial ventilation holes 16, and the rotor end plate 7 has a plurality of threaded holes 18 distributed circumferentially.

[0052] Reference Figure 1 As shown, it also includes a rotor pressing ring 8, which is pressed against the outer end surface of the rotor end plate 7 along the axial direction of the rotating shaft 1.

[0053] Reference Figure 1 As shown, it also includes a screw rod 6. The rotor punching sheet 10, the ventilation slot plate 11, the limit plate 4 and the rotor end plate 7 are correspondingly provided with a plurality of fastening holes 20, and the screw rod 6 passes through the fastening holes 20 one by one.

[0054] Reference Figure 8 , Fig. 9 , Fig.10 As shown, the ventilation slot plate 11, the limiting plate 4 and the rotor end plate 7 are each provided with a plurality of avoidance holes 17 to avoid the risk of interference of the rivets 9 therewith.

[0055] In some embodiments, the ventilation slot plate 11, the limiting plate 4 and the rotor end plate 7 are all non-magnetic components to reduce magnetic leakage and improve efficiency.

[0056] Through the above arrangement, during installation, the rotor end plate 7, multiple segmented iron cores 21 with magnetic steel, ventilation grooves with spacers 12 and limit plates 4 are fixed on the shaft in sequence, multiple screws 6 are tightened and fixed through the fastening holes 20, and the rotor pressure ring 8 is arranged on the outside of the rotor end plate 7 and welded to the shaft for axial limitation.

[0057] The embodiment of the utility model improves the heat dissipation performance of the high-voltage permanent magnet motor rotor by adding a ventilation slot plate 3 with a spacer and a limit plate 4 to form a radial ventilation duct 19 and an axial ventilation hole 16, simplifies the high-voltage permanent magnet motor rotor structure, and reduces the manufacturing difficulty.

[0058] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A high voltage permanent magnet motor rotor, characterized in that: include: Rotating shaft (1); An iron core, comprising a plurality of segmented iron cores (2), each of the segmented iron cores (2) being distributed along the axial direction of the rotating shaft (1); A plurality of ventilation slot plates (3) with spacers, each of the ventilation slot plates (3) with spacers is mounted on the rotating shaft (1) and is located between two adjacent segmented cores (2), and each of the ventilation slot plates (3) with spacers comprises a ventilation slot plate (11) and a plurality of spacers (12) distributed and mounted on the circumference of the ventilation slot plate (11); a plurality of limit plates (4), each limit plate (4) being mounted on a side of the rotating shaft (1) close to the spacer (12); Wherein, each of the limiting plates (4) and the corresponding ventilation slot plate with spacers (3) form a plurality of radial ventilation passages (19), and each of the radial ventilation passages (19) is located between two adjacent spacers (12).

2. A high voltage permanent magnet motor rotor according to claim 1, characterized in that: The segmented core (2) comprises a plurality of rivets (9) and a plurality of rotor punching sheets (10), each of the rotor punching sheets (10) having a through hole (15) distributed on its surface, and the plurality of rotor punching sheets (10) are riveted together via the rivets (9) and the through holes (15).

3. A high voltage permanent magnet motor rotor according to claim 2, characterized in that: It also comprises a plurality of magnetic steels (5), the surface of the rotor punching sheet (10) is provided with magnetic steel slots (14), and the magnetic steels (5) are installed in the magnetic steel slots (14) in a one-to-one correspondence to form a segmented iron core (21) with magnetic steel.

4. A high voltage permanent magnet motor rotor according to claim 1, characterized in that: The surface of the ventilation slot plate (11) is provided with slot holes (13), the spacers (12) are embedded in the slot holes (13), a plurality of the spacers (12) extend radially along the ventilation slot plate (11) and are evenly distributed circumferentially on the surface of the ventilation slot plate (11), a gap is left between the spacers (12) and the edge of the central hole of the ventilation slot plate (11), and each of the spacers (12) has a guiding inclined surface near the central hole of the ventilation slot plate (11).

5. A high voltage permanent magnet motor rotor according to claim 2, characterized in that: It also includes a rotor end plate (7), two of which are provided and are respectively located at two axial ends of the iron core, and the rotor punching sheet (10), the ventilation slot plate (11), the limit plate (4) and the rotor end plate (7) are each provided with a plurality of axial ventilation holes (16) correspondingly.

6. A high voltage permanent magnet motor rotor according to claim 5, characterized in that: The rotor end plate (7) has a plurality of threaded holes (18) distributed circumferentially thereon.

7. A high voltage permanent magnet motor rotor according to claim 5, characterized in that: The ventilation slot plate (11), the limiting plate (4) and the rotor end plate (7) are all non-magnetic components.

8. A high voltage permanent magnet motor rotor according to claim 5, characterized in that: It also comprises a rotor pressing ring (8), wherein the rotor pressing ring (8) is pressed against the outer end surface of the rotor end plate (7) along the axial direction of the rotating shaft (1).

9. A high voltage permanent magnet motor rotor according to claim 5, characterized in that: It also includes a screw rod (6), and the rotor punching sheet (10), the ventilation slot plate (11), the limit plate (4) and the rotor end plate (7) are each provided with a plurality of fastening holes (20) correspondingly, and the screw rod (6) passes through the fastening holes (20) one by one.

10. A high voltage permanent magnet motor rotor according to claim 5, characterized in that: The ventilation slot plate (11), the limiting plate (4) and the rotor end plate (7) are each provided with a plurality of avoidance holes (17) for avoiding the rivets (9).

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