Silicon steel sheet for rotor skewed slot forming
By designing a silicon steel sheet for rotor chute formation, and using chute bumps to form the rotor chute at the yoke of the silicon steel sheet, the problems of multiple processes and large accuracy errors in the existing technology are solved, and high precision and high accuracy are achieved. Efficient rotor machining.
Patent Information
- Application Number
- CN202420845289.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-04-23
AI Technical Summary
The prior art has many processes in the rotor chute forming process, low production efficiency, and large errors in the chute accuracy of the fake shaft, which can easily cause assembly difficulties and wear and increase production costs.
Design a silicon steel sheet for rotor chute formation, including a circular silicon steel sheet body. A through hole is provided on the axis of the silicon steel sheet body, and a plurality of rotor slots are spaced along the circumferential direction on the outer periphery. The yokes are spaced around the axis. A plurality of arc-shaped grooves are provided, and inclined groove bumps are fixed on the counterclockwise side of the arc-shaped grooves.
By arranging chute bumps on the yoke portion of the silicon steel sheets, the rotor chute is formed when the rotor is laminated, achieving high precision, fewer processing steps, and improving production efficiency.
Smart Images
Figure CN222356070U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motor manufacturing, in particular to a technology for silicon steel sheets used for rotor skew groove forming. Background Art
[0002] There are harmonics of various frequencies inside the motor, especially tooth harmonics, which will generate harmonic electromotive force, thus forming a harmonic magnetic field and causing additional torque. The current asynchronous motor has uneven magnetic resistance within the circumference of the air gap between the stator and the rotor, and the electromagnetic torque and induced electromotive force will fluctuate when the motor is running. Various factors cause the motor to generate electromagnetic vibration and noise, and there will be obvious concave points on the T / N curve during the starting process.
[0003] The prior art usually adopts appropriate inclined grooves to weaken the additional torque and noise caused by the harmonic magnetic field of the teeth. Generally, a dummy shaft hard twisting method is adopted, and the steps are as follows: a groove is milled on the surface of a dummy shaft, the groove is inclined at a certain angle along the axial direction, and then a long flat key is punched into the groove. A groove of corresponding size is punched on the inner circle of the silicon steel sheet. During the operation, the silicon steel sheets are first inserted into the dummy shaft with the flat key in sequence, pressed and fixed with nuts to form an inclined groove, and then the rotor core inserted into the dummy shaft is put into the cast aluminum hydraulic press, die-cast into aluminum liquid, and the processing is completed after pressure maintenance and cooling.
[0004] This method has many processes and low production efficiency. Moreover, the accuracy error of the dummy shaft's bevel groove is large, which can easily cause difficulties in the assembly of the dummy shaft key and silicon steel sheet. In addition, wear will occur between the dummy shaft and the rotor core, and the dummy shaft needs to be replaced regularly. When stacking rotors of different lengths, dummy shafts of different specifications are also required, and the production cost is too high. Utility Model Content
[0005] In view of the defects existing in the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a silicon steel sheet for rotor skew groove forming which has high precision and can save rotor processing steps, thereby improving production efficiency.
[0006] In order to solve the above technical problems, the utility model provides a silicon steel sheet for rotor skew forming, comprising a circular silicon steel sheet body, wherein a through hole is provided on the axis of the silicon steel sheet body, and the characteristics are:
[0007] The outer periphery of the silicon steel sheet body is provided with a plurality of rotor slots spaced apart in the circumferential direction, the yoke of the silicon steel sheet body is provided with a plurality of arc-shaped slots spaced apart around the axis, an inclined slot protrusion is fixed on the counterclockwise side of the arc-shaped slot, and the inclined slot protrusion is bent obliquely upward in the clockwise direction and then bent horizontally.
[0008] Furthermore, the number of the arc-shaped grooves is six.
[0009] The silicon steel sheets for rotor skew groove forming provided by the utility model can generate an offset in the circumferential direction for each layer of silicon steel sheets when the silicon steel sheets are stacked into a rotor, thereby forming rotor skew grooves. The utility model has the characteristics of high precision and few processing steps, and can improve the production efficiency of the rotor. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic structural diagram of a silicon steel sheet used for rotor skew groove forming according to an embodiment of the utility model;
[0011] Figure 2 It is a cross-sectional view of the arc-shaped groove of an embodiment of the utility model;
[0012] Figure 3 It is a cross-sectional view of a plurality of arc-shaped grooves stacked in an embodiment of the utility model. DETAILED DESCRIPTION
[0013] The following is a further detailed description of an embodiment of the utility model in conjunction with the accompanying drawings, but the embodiment is not intended to limit the utility model. All similar structures and similar changes of the utility model should be included in the protection scope of the utility model. The semicolons in the utility model all represent the relationship of and.
[0014] like Figure 1-Figure 2 As shown, a silicon steel sheet for rotor skew groove forming provided by an embodiment of the utility model comprises a circular silicon steel sheet body 1, and a through hole is provided on the axis of the silicon steel sheet;
[0015] The outer periphery of the silicon steel sheet 1 is provided with a plurality of rotor slots 2 spaced apart in the circumferential direction, the yoke of the silicon steel sheet 1 is provided with a plurality of arc-shaped slots 31 spaced apart around the axis, an inclined slot protrusion 32 is fixed to the counterclockwise side of the arc-shaped slot 31, and the inclined slot protrusion 32 is bent obliquely upward in the clockwise direction and then bent horizontally.
[0016] In the embodiment of the utility model, the number of the arc-shaped grooves 31 is six.
[0017] The utility model embodiment, its use method is as follows:
[0018] During rotor processing, several silicon steel sheets 1 are stacked on a hydraulic press, such as Figure 3 The upper silicon steel sheet is affected by the inclined groove protrusion 32 on the lower silicon steel sheet, and the two are offset in the circumferential direction. The offset between adjacent silicon steel sheets 1 is the same. Several silicon steel sheets can be stacked to automatically form a rotor inclined groove, and then the hydraulic press is started, aluminum liquid is die-casted, and the rotor processing can be completed by pressure-maintaining molding.
Claims
1. A silicon steel sheet for rotor skew forming, comprising a circular silicon steel sheet body, wherein a through hole is provided on the axis of the silicon steel sheet body, and wherein: The outer periphery of the silicon steel sheet body is provided with a plurality of rotor slots spaced apart in the circumferential direction, the yoke of the silicon steel sheet body is provided with a plurality of arc-shaped slots spaced apart around the axis, an inclined slot protrusion is fixed on the counterclockwise side of the arc-shaped slot, and the inclined slot protrusion is bent obliquely upward in the clockwise direction and then bent horizontally.
2. The silicon steel sheet for rotor skew forming according to claim 1, characterized in that: The number of the arc-shaped grooves is six.