CN211880186U - Z-shaped single-tooth punching sheet and stator core thereof - Google Patents
Z-shaped single-tooth punching sheet and stator core thereof Download PDFInfo
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- CN211880186U CN211880186U CN202020542328.7U CN202020542328U CN211880186U CN 211880186 U CN211880186 U CN 211880186U CN 202020542328 U CN202020542328 U CN 202020542328U CN 211880186 U CN211880186 U CN 211880186U
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Abstract
A Z-shaped single-tooth punching sheet and a stator core thereof belong to the field of motors. The Z-shaped single-tooth punching sheet comprises stator teeth and a stator yoke formed by extending the bottoms of the stator teeth along the rotating direction of the rotor; the starting line of the stator yoke is positioned at one side of the virtual middle line of the stator teeth; the stator core comprises a plurality of laminated laminations; the laminated sheets are in a circular structure formed by sequentially arranging Z-shaped single-tooth punching sheets, and rectangular stator slots for embedding windings are formed between adjacent Z-shaped single-tooth punching sheets. The utility model discloses a Z type monodentate towards piece's structure makes it can reverse the cross arrangement when production, can reduce the waste material effectively and produce, promotes material utilization rate, reduction in production cost.
Description
Technical Field
The utility model relates to the field of electric machines, especially, relate to a Z type monodentate is towards piece and stator core thereof.
Background
The stator core of the existing permanent magnet motor, particularly a high-power low-speed permanent magnet motor, is usually formed by laminating a plurality of layers of annular stators, the annular stators are formed by splicing silicon steel sector stamped sheets along the circumferential direction, and a large amount of waste materials are generated when the sector stamped sheets are produced by stamping, so that the utilization rate of materials is reduced.
SUMMERY OF THE UTILITY MODEL
For solving the problem that current fan-shaped punching sheet can produce a large amount of waste materials when stamping production, the utility model provides a Z type monodentate is towards piece and stator core thereof.
In order to achieve the above object, the utility model adopts the following technical scheme: a Z-shaped single-tooth punching sheet comprises stator teeth and a stator yoke, wherein the bottoms of the stator teeth extend along the rotation direction of a rotor to form the stator yoke; the starting line of the stator yoke is located at one side of the virtual center line of the stator teeth.
Further, the stator yoke and/or the stator teeth are provided with mounting holes for passing through the connecting piece.
Further, the mounting holes comprise mounting holes A, the circle center of each mounting hole A is located at 1/2 in the radial direction of the stator yoke and is located at the circumferential length of the radial outer edge of the stator yoke, which is 1/3-1/5 away from the nearest edge of the stator yoke in the rotation direction of the rotor.
Further, the mounting holes comprise mounting holes B, and the mounting holes B are located in the middle of the stator teeth and closer to the bottom of the stator slot.
Furthermore, the outer side surface of the stator yoke is provided with a welding groove for welding.
A stator core includes a plurality of laminated laminations; the laminated sheets are in a circular structure formed by sequentially arranging the Z-shaped single-tooth punching sheets, and rectangular stator slots for embedding windings are formed between the adjacent Z-shaped single-tooth punching sheets.
Further, the welding grooves are located at both ends of the stator yoke.
Furthermore, the multilayer lamination is divided into 2P groups of stator sections in the axial direction, wherein P is the number of pole pairs of the motor rotor, and an annular magnetic end plate is arranged between each group of stator sections.
The utility model has the advantages that: the structure of the Z-shaped single-tooth punching sheet enables the Z-shaped single-tooth punching sheet to be arranged in a reversed and crossed mode during production, waste materials can be effectively reduced, the material utilization rate is improved, and the production cost is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a ring stator in the prior art;
FIG. 2 is a schematic structural diagram of a segment in the background art;
FIG. 3 is a schematic structural view of the Z-shaped single-tooth punching sheet of the present invention;
FIG. 4 is a schematic structural view of the Z-shaped single-tooth punching sheet of the present invention;
fig. 5 is a schematic view of the Z-shaped single-tooth punching sheet stamping die of the present invention;
fig. 6 is a schematic diagram of the positions of the gap a and the gap B according to the present invention;
FIG. 7 is a schematic connection diagram of the Z-shaped single-tooth punching sheet of the present invention;
fig. 8 is a schematic structural view of the tangential rotor of the present invention.
In the figure, 1, a stator yoke, 2, stator teeth, 3, a gap A, 4, a gap B, 5, a welding groove, 5, 6, a mounting hole A, 7, a mounting hole B, 8, a stator groove, 9, a stator groove bottom, 10, a shaft, 11, a rotor iron core, 12, an air groove A, 13, a permanent magnet and 14, and an air groove B are arranged.
Detailed Description
The Z-shaped single-tooth punching sheet of the embodiment is shown in fig. 3 and 4, and includes a stator yoke 1 formed by extending the bottoms of a stator tooth 2 and a stator tooth 2 along the rotation direction of a rotor, the start line of the stator yoke 1 is located at one side of the virtual center line of the stator tooth at the position, and the distance between the start line and the virtual center line of the stator tooth is 0.1-0.2 mm, when the start line is located at one side of the virtual center line of the stator tooth along the rotation direction of the rotor, the lamination surface is prevented from being recoiled during lamination installation to influence the lamination coefficient, when the start line is located at one side of the virtual center line of the stator tooth along the reverse rotation direction of the rotor, the offset direction of the Z-shaped single-tooth punching sheet can be balanced, as shown in fig. 5, the punching mold of the Z-shaped single-tooth punching sheet during production is provided, the.
The Z-shaped single-tooth punching sheets are also provided with mounting holes for mounting bolts of connecting pieces, the Z-shaped single-tooth punching sheets can be sequentially arranged into laminated sheets with a circular structure through the positioned bolts, the laminated sheets are sequentially laminated in multiple layers to form a stator core, further, the laminated sheets are stably connected, the laminated sheets are provided with self-adhesive coatings, and as shown in fig. 7, rectangular stator slots 8 are formed between the adjacent Z-shaped single-tooth punching sheets and are used for embedding and forming windings; the mounting holes are divided into a mounting hole A6 and a mounting hole B7, the circle center of the mounting hole A6 is located at the radial 1/2 position of the stator yoke 1, the distance from the gap A3 (also the edge of the stator yoke 1) which is closest to the rotor rotation direction is 1/3-1/5 in the circumferential length position of the radial outer edge of the stator yoke 1, the mounting hole B7 is located at the position, close to the bottom 9 of the stator slot, of the middle of each stator tooth 2 and used for relieving the magnetic saturation degree of the tooth part corresponding to the position of the notch near the tooth top, and a good mounting gap can be guaranteed when the lamination is mounted;
furthermore, the outer side surface of the Z-shaped single-tooth punching sheet is provided with a welding groove 5 which is axially communicated and used for welding; the positions of the welding grooves 5 are located at both ends of the stator yoke 1 as shown in fig. 4; when in connection, all the welding grooves 5 need to be welded, and the mounting holes can adopt a mode that the mounting hole A6 and the mounting hole B7 are all connected, or adopt a mode that part of the mounting hole A6 and the mounting hole B7 are connected, and further the mounting hole A6 and the mounting hole B7 are alternately used in proportion, for example: a mode that one mounting hole A6 and one mounting hole B7 are used alternately (one of two adjacent Z-shaped single-tooth punching sheets is connected through a mounting hole A6, and the other is connected through a mounting hole B7) or a mode that one mounting hole A6 and two mounting holes B7 are used alternately is adopted;
as shown in fig. 6 and 7, a gap A3 is formed between the stator yoke 1 of the first Z-shaped single-tooth punching sheet and the stator yoke 1 of the second Z-shaped single-tooth punching sheet in two adjacent Z-shaped single-tooth punching sheets in the lamination sheet, a gap B4 is formed between the stator yoke 1 of the first Z-shaped single-tooth punching sheet and the stator tooth 2 of the second Z-shaped single-tooth punching sheet, the gap A3 is located on one side of the virtual center line of the stator tooth, the position of the gap is determined by the starting line of the stator yoke 1, and the size of the gap A3 and the size of the gap B4 are 0.1-0.2 mm, so that the gap is uniformly distributed to make the magnetic circuit symmetrical, and the axial current caused by the distribution of the gap is reduced;
further, the stator core is divided into 2P groups of stator segments in the axial direction, wherein P is the number of pole pairs of the motor rotor, an annular magnetic conduction end plate with the thickness of 3mm is arranged between each group of stator segments, the width of the annular magnetic conduction end plate is the same as that of the stator yoke, and a mounting hole C corresponding to the mounting hole A6 is formed in the annular magnetic conduction end plate.
A tangential rotor with the rotating speed of 50 rpm-200 rpm is installed in a stator iron core formed by Z-shaped single-tooth punching sheets, a water jacket for cooling is arranged on the outer side of the stator iron core, and a shell is arranged outside the water jacket, so that a stator is formed; as shown in fig. 8, permanent magnets 13 are embedded in a rotor core 11 of the tangential rotor, the permanent magnets 13 are uniformly distributed at 90-degree intervals, air slots B14 are provided between the permanent magnets 13 and a shaft 10, and air slots a12 are provided between the rotor core 11 and the shaft 10.
The embodiment also provides a production method of the stator of the high-power low-speed permanent magnet motor with the stator core, which comprises the following steps:
s1, placing corresponding bolts on the vertical operating platform in advance according to the quantity and the positions of the mounting holes A6 and the mounting holes B7, wherein the bolts play a positioning role; the number of the mounting holes B7 is determined by the laminating coefficient of the stator core which is reasonable;
s2, placing the end plate A on the vertical operating platform through a bolt to be used as the bottommost layer, wherein the width of the end plate A is the same as that of the stator yoke 1;
s3, placing Z-shaped single-tooth punching sheets on the end plate A to form a lamination, and stacking the lamination to a specified layer number, wherein the annular magnetic conduction end plate needs to be stacked at a specified position in the stacking process; at the moment, the bolt plays a role in positioning;
s4, placing the end plate B on the lamination of the uppermost layer through a bolt to serve as the uppermost layer, and fastening one end, through which the bolt penetrates, by a nut to ensure the reasonable lamination coefficient of the stator core; at the moment, the bolt plays a role in fixing and fastening, and the end plate B and the stator yoke 1 have the same width;
s5, putting the whole body obtained in the step S4 into a high-temperature furnace, heating according to preset temperature and time, cooling and taking out;
s6, welding all the welding grooves 5 to enable the mounting holes and the welding grooves 5 to fix the lamination together; further, bolts partially positioned in the mounting holes A6 and B7 can be removed;
s7, sleeving a water jacket and a casing, laying an insulating material in the stator slot 8, then placing a formed winding and arranging a slot wedge; when the bolts are partially removed in step S6 in the mounting holes a6 and B7, the temperature measuring element is mounted and wired in the mounting holes a6 and B7 to which no bolt is mounted;
and S8, putting the whole body obtained in the step S7 into a paint dipping furnace, and performing vacuum encapsulation by using epoxy resin, wherein the epoxy resin is dipped into the gap A3 and the gap B4 to play a certain fixing role.
The above description is only the specific implementation manner of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the design of the present invention within the technical scope of the present invention.
Claims (8)
1. A Z-shaped single-tooth punching sheet is characterized by comprising stator teeth (2) and a stator yoke (1) formed by extending the bottoms of the stator teeth (2) along the rotation direction of a rotor; the starting line of the stator yoke (1) is positioned at one side of the virtual middle line of the stator teeth.
2. The Z-shaped single-tooth punching sheet according to claim 1, characterized in that mounting holes for passing through connecting pieces are formed in the stator yoke (1) and/or the stator teeth (2).
3. The Z-shaped single-tooth punching sheet according to claim 2, characterized in that the mounting holes comprise a mounting hole A (6), the circle center of the mounting hole A (6) is located at the radial direction 1/2 of the stator yoke (1) and is located at the circumferential length of the radial outer edge of the stator yoke (1) which is 1/3-1/5 away from the nearest edge of the stator yoke (1) in the rotation direction of the rotor.
4. The Z-shaped single-tooth punching sheet according to claim 2, characterized in that the mounting holes comprise a mounting hole B (7), and the mounting hole B (7) is positioned in the middle of the stator tooth (2) and closer to the bottom (9) of the stator slot.
5. The Z-shaped single-tooth punching sheet according to claim 2, characterized in that a welding groove (5) for welding is formed in the outer side face of the stator yoke (1).
6. The Z-shaped single-tooth punching sheet according to claim 5, characterized in that the welding grooves (5) are positioned at two ends of the stator yoke (1).
7. A stator core comprising a plurality of stacked laminations; the laminated sheets are Z-shaped single-tooth punching sheets of any one of claims 1 to 5, the Z-shaped single-tooth punching sheets are sequentially arranged into a circular structure, and rectangular stator slots (8) for embedding windings are formed between the adjacent Z-shaped single-tooth punching sheets.
8. The stator core as claimed in claim 7 wherein the plurality of laminations are axially equally divided into 2P groups of stator segments, where P is the number of pole pairs of the motor rotor, with annular magnetically conductive end plates disposed between each group of stator segments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020542328.7U CN211880186U (en) | 2020-04-14 | 2020-04-14 | Z-shaped single-tooth punching sheet and stator core thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020542328.7U CN211880186U (en) | 2020-04-14 | 2020-04-14 | Z-shaped single-tooth punching sheet and stator core thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211880186U true CN211880186U (en) | 2020-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020542328.7U Active CN211880186U (en) | 2020-04-14 | 2020-04-14 | Z-shaped single-tooth punching sheet and stator core thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211880186U (en) |
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2020
- 2020-04-14 CN CN202020542328.7U patent/CN211880186U/en active Active
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