Stator silicon steel sheet for special motor

Abstract

The utility model relates to a silicon steel sheet of a motor, in particular to a stator silicon steel sheet for a special motor, which comprises a square silicon steel sheet body, a rotor hole arranged at the center of the silicon steel sheet body, wire slots arranged in an annular array along the rotor hole, and fixing holes arranged at four corners of the silicon steel sheet body, the silicon steel sheet further comprises heat dissipation holes used for containing cooling pipes, the heat dissipation holes are formed in the four corner areas of the silicon steel sheet body and located between the fixing holes and the wire grooves, and the heat dissipation holes comprise a plurality of small heat dissipation holes. According to the stator silicon steel sheet for the special motor provided by the utility model, the heat dissipation holes for placing the cooling pipes are arranged in the silicon steel sheet for heat dissipation, so that the heat dissipation effect can be ensured, the installation is convenient, the stator silicon steel sheet can be used in various environments, and the application range of the motor is expanded.

Description

Technical Field

[0001] This utility model relates to a silicon steel sheet for an electric motor, and more particularly to a stator silicon steel sheet for a special electric motor. Background Technology

[0002] For high-power special motors, to improve heat dissipation, cooling grooves are typically incorporated into silicon steel sheets. For example, CN214850672U discloses a motor stator cooling structure, which includes a stator and a cavity for sealing the stator. A groove is provided between the outer surface of the stator and the cavity, and coolant flows within the groove. Holes are provided on the stator for coolant flow. While this motor stator cooling structure achieves liquid cooling and improves the cooling effect, it requires high sealing performance, leading to assembly difficulties. Furthermore, it has strict requirements for the operating environment and cannot be used in environments with significant vibration, thus limiting its application range. Utility Model Content

[0003] To solve the above problems, this utility model provides a stator silicon steel sheet for special motors, the specific technical solution of which is as follows:

[0004] A stator silicon steel sheet for a special motor includes a square silicon steel sheet body. The silicon steel sheet body has a rotor hole at its center, a wire groove arranged in a ring array along the rotor hole, and fixing holes at the four corners of the silicon steel sheet body. It also includes heat dissipation holes for placing cooling pipes. The heat dissipation holes are located in the four corner areas of the silicon steel sheet body and between the fixing holes and the wire grooves. The heat dissipation holes include a plurality of small heat dissipation holes.

[0005] Preferably, the heat dissipation holes are symmetrically arranged on both sides of the fixing hole, and the heat dissipation holes include a first heat dissipation hole, a second heat dissipation hole, a third heat dissipation hole and a fourth heat dissipation hole arranged in sequence.

[0006] Furthermore, the distance between the heat dissipation holes and the wire groove is the same.

[0007] Furthermore, the side of the fourth heat dissipation hole opposite to the groove is an arc surface.

[0008] Furthermore, the second, third, and fourth heat dissipation holes are equidistant from the outer surface of the silicon steel sheet body.

[0009] Preferably, the silicon steel sheet body has chamfers at all four corners.

[0010] Furthermore, the silicon steel sheet body has a first slot on each of its four chamfered corners, and the first slot communicates with the fixing hole.

[0011] Preferably, the silicon steel sheet body has a second slot on each of its four sides.

[0012] Furthermore, the silicon steel sheet body has a third groove on each of its four sides, and the third groove is a V-shaped groove.

[0013] Furthermore, the second slots on the first side and the second side opposite to the first side of the silicon steel sheet body are symmetrically arranged, and the third slots are staggered respectively; the second slots and the third slots on the third side and the fourth side opposite to the third side of the silicon steel sheet body are also symmetrically arranged.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This utility model provides a stator silicon steel sheet for special motors that dissipates heat by setting heat dissipation holes inside the silicon steel sheet for placing cooling pipes. This not only ensures heat dissipation effect, but also facilitates installation and can be used in various environments, thus improving the application range of the motor. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this application. Detailed Implementation

[0017] The present invention will now be further described with reference to the accompanying drawings.

[0018] like Figure 1 As shown, a stator silicon steel sheet for a special motor includes a silicon steel sheet body 1, which is a cube. A rotor hole 21 is located at the center of the silicon steel sheet body 1. The silicon steel sheet also has slots 22 for fixing the stator windings, arranged in a circular array along the axis of the rotor hole 21. Fixing holes 4 for placing bolts are located at the four corners of the silicon steel sheet body 1, arranged in a circular array. The silicon steel sheet body 1 also has heat dissipation holes 3, located in the four corner areas 11 and between the fixing holes 4 and the slots 22. The heat dissipation holes 3 include several small heat dissipation holes for housing cooling pipes, typically metal pipes, which match the heat dissipation holes. This facilitates installation and ensures effective heat dissipation through multiple small holes, reducing the risk of leakage and making the motor suitable for various applications.

[0019] To further increase the number of heat dissipation holes, improve the heat dissipation effect, facilitate processing, and reduce stress, the heat dissipation holes are symmetrically arranged on both sides of the fixing hole 4.

[0020] like Figure 1As shown, the distance between the heat dissipation hole and the wire groove 22 is the same, that is, the radial distance between the heat dissipation hole and the edge of the wire groove 22 is the same, that is, the inner edge of the heat dissipation hole is on the same circle 20, forming a complete ring, so as to make the surrounding area of ​​the wire groove 22 have a stable magnetic flux.

[0021] To further increase the number of heat dissipation holes 3, the heat dissipation holes include a first heat dissipation hole 31, a second heat dissipation hole 32, a third heat dissipation hole 33 and a fourth heat dissipation hole 34 arranged in sequence. The side of the fourth heat dissipation hole 34 opposite to the wire groove 22 is an arc surface 341. The arc surface 341 can keep the distance between the heat dissipation hole and the wire groove 22 unchanged, while increasing the heat dissipation area of ​​the heat dissipation hole.

[0022] To ensure the strength of the silicon steel sheet body 1 and to facilitate processing and reduce stress, the distances between the second heat dissipation hole 3, the third heat dissipation hole 3, and the fourth heat dissipation hole 3 and the outer side surface of the silicon steel sheet body 1 are equal, so that a reserved area 12 is formed between the second heat dissipation hole 32, the third heat dissipation hole 33, and the fourth heat dissipation hole 34 and the four sides of the silicon steel sheet body 1. The reserved area 12 can ensure strength and facilitate stamping.

[0023] The silicon steel sheet body 1 has chamfers 5 at all four corners. These chamfers 5 can be either right-angled or rounded. The chamfers 5 prevent sharp corners from forming, effectively eliminating sharp edges and reducing stress concentration. This helps reduce mechanical damage and crack propagation caused by stress concentration, thereby improving the mechanical strength of the silicon steel sheet. The chamfered edges are smoother and more rounded, significantly reducing chipping and cracking during subsequent processing and use. This not only improves the durability of the silicon steel sheet but also reduces losses during production. The chamfers 5 make the edge lines of the silicon steel sheet smoother, reducing burrs and irregular shapes, thus improving the overall appearance quality and processing accuracy. During the processing of the silicon steel sheet, such as cutting and stamping, stress layers may form at the edges. The chamfers 5 effectively remove these stress layers, preventing lattice defects caused by stress in subsequent processes. The chamfered silicon steel sheet is easier to assemble, reducing scratches or damage caused by sharp edges, and also facilitating integration with other components.

[0024] The four chamfers 5 of the silicon steel sheet body 1 are also provided with first slots 6. The first slots 6 communicate with the fixing holes 4. The first slots 6 can relieve stress. When the stator silicon steel sheets are tilted and stacked at a preset angle, stress will be generated on the surface of the silicon steel sheets. It can also be used with buckles or other fixing devices to better restrict the position of the silicon steel sheets and prevent them from shifting during assembly.

[0025] To reduce the flow path of magnetic flux in the non-rolling direction, the silicon steel sheet body 1 has a second slot 7 on each of its four sides. The second slot 7 is a trapezoidal slot. The second slot 7 can also be used to place reinforcing ribs after the silicon steel sheets are stacked, thereby achieving the positioning of the silicon steel sheets and enhancing the overall strength, improving the stability and reliability of the structure.

[0026] In order to improve the permeability and reluctance of silicon steel sheets and thus enhance their electromagnetic performance in motors or transformers, the four sides of the silicon steel sheet body 1 are provided with third slots 8, and the third slots 8 are V-shaped slots. The third slots 8 can also be used to position or guide the stacking of silicon steel sheets to ensure that they can be accurately aligned during assembly and improve production efficiency.

[0027] To ensure that the assembly direction of the silicon steel sheet body 1 is consistent, such as... Figure 1 As shown, the second slots 7 on the first side 15 and the second side 16 opposite to the first side 15 of the silicon steel sheet body 1 are symmetrically arranged, and the third slots 8 are staggered. The second slots 7 and third slots 8 on the third side 17 and the fourth side 18 opposite to the third side 17 of the silicon steel sheet body 1 are also symmetrically arranged. With these positioning arrangements, errors in the installation direction of the silicon steel sheets can be clearly observed. Maintaining the same stamping direction when stacking silicon steel sheets ensures that the permeability and hysteresis loss of the silicon steel sheets remain consistent in the assembled core, thereby improving the overall performance of the motor, reducing eddy current losses caused by inconsistent directions, and thus improving equipment efficiency. During assembly, maintaining the same stamping direction ensures the consistency of the size and shape of the silicon steel sheets, reducing assembly errors, which is crucial for improving the mechanical strength and stability of the core. A unified stamping direction simplifies the processing technology, reduces processing complexity caused by inconsistent directions, thereby improving production efficiency and reducing processing costs. Maintaining the same stamping direction reduces mechanical stress concentration caused by inconsistent directions, thereby improving the mechanical strength and service life of the silicon steel sheets. Maintaining a consistent stamping direction facilitates automated assembly. Automated equipment can process silicon steel sheets with the same orientation more efficiently, reducing manual intervention and improving assembly accuracy and production efficiency. A uniform stamping direction reduces edge burrs and damage caused by inconsistent orientation, thereby improving the surface quality of the silicon steel sheets and reducing insulation damage caused by burrs.

[0028] The depth of the second slot 7 does not contact the circle 20, thus not damaging the inner annulus.

[0029] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these embodiments will all fall within the protection scope of the claims of this utility model.

Claims

1. A stator silicon steel sheet for a special motor, comprising a square silicon steel sheet body (1), wherein the silicon steel sheet body (1) has a rotor hole (21) at its center, wire grooves (22) arranged in a ring array along the rotor hole (21), and fixing holes (4) provided at the four corners of the silicon steel sheet body (1), characterized in that, It also includes: heat dissipation holes (3) for placing cooling pipes, wherein the heat dissipation holes (3) are located in the four corner areas (11) of the silicon steel sheet body (1) and between the fixing hole (4) and the wire groove (22), wherein the heat dissipation holes (3) include a plurality of small heat dissipation holes.

2. The stator silicon steel sheet for a special motor according to claim 1, characterized in that, The heat dissipation holes are symmetrically arranged on both sides of the fixing hole (4), and the heat dissipation holes include a first heat dissipation hole (31), a second heat dissipation hole (32), a third heat dissipation hole (33), and a fourth heat dissipation hole (34) arranged in sequence.

3. The stator silicon steel sheet for a special motor according to claim 2, characterized in that, The distance between the heat dissipation hole and the groove (22) is the same.

4. The stator silicon steel sheet for a special motor according to claim 2, characterized in that, The side of the fourth heat dissipation hole (34) opposite to the groove (22) is an arc surface (341).

5. A stator silicon steel sheet for a special motor according to claim 2, characterized in that, The second heat dissipation hole (32), the third heat dissipation hole (33) and the fourth heat dissipation hole (34) are equidistant from the outer surface of the silicon steel sheet body (1).

6. A stator silicon steel sheet for a special motor according to any one of claims 1 to 5, characterized in that, The silicon steel sheet body (1) has chamfers (5) on all four corners.

7. A stator silicon steel sheet for a special motor according to claim 6, characterized in that, The silicon steel sheet body (1) is provided with a first slot (6) on the four chamfers (5), and the first slot (6) communicates with the fixing hole (4).

8. A stator silicon steel sheet for a special motor according to any one of claims 1 to 5, characterized in that, The silicon steel sheet body (1) has a second slot (7) on each of its four sides.

9. A stator silicon steel sheet for a special motor according to claim 8, characterized in that, The silicon steel sheet body (1) has a third groove (8) on each of its four sides, and the third groove (8) is a V-shaped groove.

10. A stator silicon steel sheet for a special motor according to claim 9, characterized in that, The first side (15) of the silicon steel sheet body (1) and the second side (16) opposite to the first side (15) are symmetrically arranged with second slots (7), and the third slots (8) are staggered. The second slot (7) and the third slot (8) of the third side (17) and the fourth side (18) opposite to the third side (17) of the silicon steel sheet body (1) are symmetrically arranged.

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