Rotor punching sheet
By designing the distribution structure of four groups of arc magnetic steel holes and reinforcement ribs on the rotor punch, the problem of insufficient strength of the rotor punch at high speed is solved, and the efficient operation of the motor and low iron consumption are achieved.
Patent Information
- Application Number
- CN202422423716.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-10-09
AI Technical Summary
The rotor punching plate of the existing synchronous reluctance motor is insufficient at high speed, which is prone to fracture of the magnetic isolation bridge, and local magnetic passing saturation, which affects the motor efficiency and iron consumption.
A rotor punching structure is designed, including four groups of arc magnetic steel holes and reinforcement ribs. The arc magnetic steel holes are distributed in layers and reinforcement ribs are provided on the outer layer. Screw vias and keyways are used for positioning, improving structural strength and reducing magnetic saturation.
The structural strength of the rotor punching plate is improved, the local magnetic pass saturation phenomenon is reduced, the efficiency of the motor is improved and the iron consumption is reduced.
Smart Images
Figure CN223297430U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a rotor punching sheet. Background Art
[0002] Currently, there are three main types of industrial motors: asynchronous motors, permanent magnet synchronous motors, and switched reluctance motors. Asynchronous motors have a simple structure but low efficiency; permanent magnet synchronous motors are efficient but use rare earth permanent magnets, which increases costs; and switched reluctance motors have high torque ripple and are noisy.
[0003] Nowadays, the development of energy-saving and environmentally friendly high-efficiency motors is becoming more and more meaningful. At present, the rotor lamination structure of synchronous reluctance motors is not strong enough at high speeds, and the magnetic bridge may break. Utility Model Content
[0004] In order to solve the problems existing in the prior art, the utility model provides a new rotor punching sheet, which effectively improves the strength of the rotor punching sheet structure, reduces the phenomenon of local magnetic saturation, and reduces iron loss.
[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0006] A rotor punching comprises a disc-shaped punching body, wherein an axial hole cooperating with a motor shaft is provided at the center of the punching body, and four groups of arc magnetic steel holes are provided on the punching body. The four groups of arc magnetic steel holes are distributed around the center of the punching body, and each group of arc magnetic steel holes comprises four layers of arc magnetic steel holes. Both ends of each layer of arc magnetic steel holes are located on concentric circles of the punching body. Reinforcing ribs are provided on the three layers of arc magnetic steel holes closer to the center of the punching body among the four layers of arc magnetic steel holes. The reinforcing ribs are located in the middle of each group of arc magnetic steel holes, and the centers of the arc magnetic steel holes are all located outside the punching body.
[0007] Preferably, the four layers of circular arc magnetic steel holes are sequentially arranged outward on the punching body and are divided into a first layer of circular arc magnetic steel holes, a second layer of circular arc magnetic steel holes, a third layer of circular arc magnetic steel holes and a fourth layer of circular arc magnetic steel holes, and the two ends of the four layers of circular arc magnetic steel holes are located on the same circle;
[0008] The outer arc radius of the first layer of circular arc magnetic steel holes is concentrically arranged with the inner arc radius of the fourth layer of circular arc magnetic steel holes, the inner arc radius of the first layer of circular arc magnetic steel holes is concentrically arranged with the outer arc radius of the fourth layer of circular arc magnetic steel holes, the outer arc radius of the second layer of circular arc magnetic steel holes is concentrically arranged with the inner arc radius of the third layer of circular arc magnetic steel holes, the inner arc radius of the second layer of circular arc magnetic steel holes is concentrically arranged with the outer arc radius of the third layer of circular arc magnetic steel holes, and the inner and outer arc centers of the circular arc magnetic steel holes are both located outside the punching sheet body.
[0009] Preferably, screw through holes are provided on the punch body, and the number of the screw through holes is four. The four screw through holes are distributed around the center of the punch body, and each screw through hole is located between two adjacent groups of arc magnetic steel holes.
[0010] Preferably, a keyway is provided on the shaft hole, and the keyway is used to position the punch body relative to the motor shaft through a key.
[0011] Preferably, the end of the keyway away from the shaft hole has a height difference of 1 mm.
[0012] Preferably, the widths of the reinforcing ribs on the first layer of circular arc magnetic steel holes, the second layer of circular arc magnetic steel holes, and the third layer of circular arc magnetic steel holes decrease successively.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] The utility model designs a novel rotor punching sheet, which ensures the structural strength of the rotor punching sheet, effectively reduces the phenomenon of local magnetic through saturation, reduces iron loss, and improves the efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.
[0016] Figure 2 It is an enlarged schematic diagram of the shaft hole structure in the embodiment of the present utility model.
[0017] Reference numerals in the figures:
[0018] 1. Punch body; 2. Shaft hole; 3. Keyway; 4. Screw hole; 5. Arc magnetic steel hole; 6. Reinforcement rib. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0020] The embodiment of the utility model discloses a rotor punching sheet.
[0021] like Figure 1 and Figure 2As shown, the rotor punching includes a disc-shaped punching body 1, and the center of the punching body 1 is provided with an axial hole 2 that cooperates with the motor shaft. The axial hole 2 is provided with a keyway 3, which is used to position the punching body 1 relative to the motor shaft by means of a key. The punching body 1 is provided with four screw holes 4, and the four screw holes 4 are distributed around the center of the punching body 1. The punching body 1 is provided with four groups of circular arc magnetic steel holes 5, and the four groups of circular arc magnetic steel holes 5 are distributed around the center of the punching body 1, and each screw hole 4 is located between two adjacent groups of circular arc magnetic steel holes 5.
[0022] Specifically, each group of arc magnetic steel holes 5 includes four layers of arc magnetic steel holes 5, and both ends of all the arc magnetic steel holes 5 are located on the same concentric circle of the punching body 1. The three layers of arc magnetic steel holes 5 that are closer to the center of the punching body 1 among the four layers of arc magnetic steel holes 5 are provided with reinforcing ribs 6. The reinforcing ribs 6 are located in the middle of each group of arc magnetic steel holes 5, and the center of the arc magnetic steel holes 5 are all located outside the punching body 1.
[0023] In this embodiment, the diameter of the punch body 1 is generally 100-400mm, the diameter of the shaft hole 2 is 35-130mm, the width of the keyway 3 is set according to actual needs, and the keyway 3 has a height difference at both ends of the side away from the shaft hole 2, the height difference is 0.5-2mm, and the height difference is generally set to 1mm. The diameter of the screw through hole 4 is 4-20mm, and the screw through holes 4 are distributed on a circle with a diameter of 50-200mm.
[0024] The four layers of circular arc magnetic steel holes 5 are arranged outward in sequence on the punching body 1 and are divided into the first layer of circular arc magnetic steel holes 5, the second layer of circular arc magnetic steel holes 5, the third layer of circular arc magnetic steel holes 5 and the fourth layer of circular arc magnetic steel holes 5. The inner and outer arc radii of the first layer of circular arc magnetic steel holes 5, the second layer of circular arc magnetic steel holes 5, the third layer of circular arc magnetic steel holes 5 and the fourth layer of circular arc magnetic steel holes 5 are not equal. The two ends of the circular arc magnetic steel holes 5 are located on the concentric circles of the punching body 1, and the difference in radius between the two is 1-3 mm.
[0025] The outer arc radius of the first layer of circular arc magnetic steel holes 5 is concentric with the inner arc radius of the fourth layer of circular arc magnetic steel holes 5, the inner arc radius of the first layer of circular arc magnetic steel holes 5 is concentric with the outer arc radius of the fourth layer of circular arc magnetic steel holes 5, the outer arc radius of the second layer of circular arc magnetic steel holes 5 is concentric with the inner arc radius of the third layer of circular arc magnetic steel holes 5, and the inner arc radius of the second layer of circular arc magnetic steel holes 5 is concentric with the outer arc radius of the third layer of circular arc magnetic steel holes 5. The distances between the four circle centers and the center of the punch body 1 increase sequentially. At the same time, the widths of the reinforcing ribs 6 on the first layer of circular arc magnetic steel holes 5, the second layer of circular arc magnetic steel holes 5, and the third layer of circular arc magnetic steel holes 5 decrease sequentially, such as 2.5 mm, 2 mm, and 1.5 mm.
[0026] In addition, the keyway 3 and the connection between the keyway 3 and the shaft hole 2 are rounded, with a radius of 0.5mm. The ends of the arc magnetic steel holes 5 are rounded, with a radius generally set to 0.5mm. The first layer of arc magnetic steel holes 5, the second layer of arc magnetic steel holes 5, and the third layer of arc magnetic steel holes 5 are rounded at the reinforcing ribs 6. The radius of the corners can be the same or different. Preferably, the radius of the corners is 1.5mm, 1mm, and 0.5mm, respectively.
[0027] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A rotor punching sheet, comprising a disc-shaped punching sheet body (1), wherein the center of the punching sheet body (1) is provided with an axial hole (2) for matching with the motor shaft, characterized in that: Four groups of circular arc magnetic steel holes (5) are provided on the punching sheet body (1). The four groups of circular arc magnetic steel holes (5) are distributed around the center of the punching sheet body (1). Each group of circular arc magnetic steel holes (5) includes four layers of circular arc magnetic steel holes (5). The two ends of each layer of circular arc magnetic steel holes (5) are located on the concentric circles of the punching sheet body (1). Among the four layers of circular arc magnetic steel holes (5), three layers of circular arc magnetic steel holes (5) that are closer to the center of the punching sheet body (1) are provided with reinforcing ribs (6). The reinforcing ribs (6) are located in the middle of each group of circular arc magnetic steel holes (5). The centers of the circular arc magnetic steel holes (5) are all located outside the punching sheet body (1).
2. A rotor punching according to claim 1, characterized in that: The four layers of circular arc magnetic steel holes (5) are sequentially arranged outward on the punching sheet body (1) and are divided into a first layer of circular arc magnetic steel holes (5), a second layer of circular arc magnetic steel holes (5), a third layer of circular arc magnetic steel holes (5) and a fourth layer of circular arc magnetic steel holes (5), and the two ends of the four layers of circular arc magnetic steel holes (5) are located on the same circle; The outer arc radius of the first layer of circular arc magnetic steel holes (5) is concentrically arranged with the inner arc radius of the fourth layer of circular arc magnetic steel holes (5), the inner arc radius of the first layer of circular arc magnetic steel holes (5) is concentrically arranged with the outer arc radius of the fourth layer of circular arc magnetic steel holes (5), the outer arc radius of the second layer of circular arc magnetic steel holes (5) is concentrically arranged with the inner arc radius of the third layer of circular arc magnetic steel holes (5), the inner arc radius of the second layer of circular arc magnetic steel holes (5) is concentrically arranged with the outer arc radius of the third layer of circular arc magnetic steel holes (5), and the inner and outer arc centers of the circular arc magnetic steel holes (5) are both located outside the punching sheet body (1).
3. A rotor punching according to claim 2, characterized in that: The punching sheet body (1) is provided with screw through holes (4), and the number of the screw through holes (4) is four. The four screw through holes (4) are distributed around the center of the punching sheet body (1), and each screw through hole (4) is located between two adjacent groups of arc magnetic steel holes (5).
4. A rotor punching according to claim 2, characterized in that: A keyway (3) is provided on the shaft hole (2), and the keyway (3) is used to position the punch body (1) relative to the motor shaft via a key.
5. A rotor punching according to claim 4, characterized in that: The keyway (3) has a height difference of 1 mm at one end away from the shaft hole (2).
6. A rotor punching according to claim 2, characterized in that: The widths of the reinforcing ribs (6) on the first layer of circular arc magnetic steel holes (5), the second layer of circular arc magnetic steel holes (5), and the third layer of circular arc magnetic steel holes (5) decrease in sequence.