CN217010472U

CN217010472U - Rotor core punching sheet structure

Info

Publication number: CN217010472U
Application number: CN202122842530.9U
Authority: CN
Inventors: 王辉; 张磊; 叶飞; 马晓鹏; 杨瑞敏
Original assignee: Xi'an Tsingtech New Energy Technology Co ltd
Current assignee: Xi'an Tsingtech New Energy Technology Co ltd
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-07-19
Anticipated expiration: 2031-11-19

Abstract

The utility model relates to the technical field of manufacturing of motor rotor punching sheets and rotor iron cores, in particular to a rotor iron core punching sheet structure, wherein an iron core punching sheet comprises a plurality of key grooves distributed along the circumferential direction, and the key grooves are provided with mark characteristics; the mark features respectively correspond to the key grooves; when the iron cores are laminated, all laminated iron cores of each section are arranged in the same way; after the laminated iron core is loaded with magnetic steel according to design requirements, when the laminated iron core is assembled with a rotating shaft and is laminated section by section along the axial direction of the rotating shaft, different key grooves are respectively matched with the key of the rotating shaft, so that the laminated rotor iron core is changed once along the axial direction at intervals of polar directions, and the polar angle of the rotor iron core is changed in stages; the iron core punching sheet structure is used for realizing other iron core laminating modes except for an iron core torsion sheet controlled by matching the skewed slot key groove with the key.

Description

Rotor core punching sheet structure

Technical Field

The utility model relates to the technical field of manufacturing of motor rotor punching sheets and rotor iron cores, in particular to a rotor iron core punching sheet structure.

Background

With the development of the motor industry, especially with the development of new energy technology, a lot of requirements for safe, reliable, large-torque, high-rotating-speed and high-power motors appear, a large amount of rare earth permanent magnet steel with high magnetic energy product is used, and a large amount of magnetic steel with high magnetic energy product is used, so that the advantages of high speed, large torque, high efficiency and the like of the motors are met, and most of user requirements are met. However, the magnetic steel with excessive and excessive magnetic attraction force is adopted, so that the cogging torque of the motor is excessive, excessive torque pulsation is generated, the rotating speed pulsation is excessive, the motor is difficult to start, excessive motor vibration and noise are generated, the positioning accuracy and the servo performance of the motor are seriously influenced, and the influence is larger particularly at low speed.

At present, the common method for solving the cogging torque mainly comprises the steps of changing the design of stator and rotor slot types, changing the number of stator and rotor slots and the slot matching, changing the number of magnetic poles, changing magnetic pole parameters and the like, and in addition, the cogging torque is improved by adopting a skewed slot mode during iron core press mounting.

The method has the advantages that the cogging torque is improved by using the chute technology, the method is simple, and the like, and meanwhile, when the chute mode is adopted, the shaft processing is relatively troublesome, the magnetic steel is more difficult to be loaded in the chute, and the chute loaded magnetic steel has the defects of low magnetic energy utilization rate, larger motor heating, lower efficiency and the like due to overlarge fit clearance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, and provides a rotor core punching sheet structure which can effectively realize the pole staggering of an iron core in the axial direction of a rotating shaft and realize the purpose of reducing the cogging torque of the iron core.

In order to achieve the purpose, the technical scheme provided by the utility model is as follows:

the utility model provides a rotor core sheet structure, its characterized in that, the sheet structure includes the characteristic groove more than two at least, the characteristic groove includes the cell type setting, and the cooperation of groove number and relevant different angle distribution.

The characteristic grooves are designed into a plurality of key grooves distributed along the circumferential direction of the inner diameter of the stamped steel, and each key groove is provided with a corresponding shape mark.

The number of the key slots is the same as the number of the laminated sections of the punching sheets, namely the number of the key slots of the punching sheets is the same as the number of the iron core sections during assembly.

The key grooves distributed along the circumferential direction of the inner diameter of the punching sheet are distributed at a certain angle and comprise equal division angles and unequal division angles.

When the iron core punching sheet structure is laminated into an iron core, the position of the key groove of each section of the iron core is kept at a fixed position, namely all the iron cores are laminated the same when the magnetic steel is not installed.

When the magnetic steel is loaded into the iron core, the magnetic steel with the same polarity is inserted into the corresponding magnetic steel slot of each iron core.

When the iron core with the magnetic steel is installed in the rotor rotating shaft, each section of iron core is installed in the rotating shaft according to different key slot numbers specified by design.

The laminated iron cores are arranged in each section according to different key slot numbers, and in the axial direction of the rotor rotating shaft, staged polarity staggering is formed.

Compared with the prior art, the utility model has the following advantages:

1. providing a rotor core punching sheet structure, wherein the core punching sheet comprises a plurality of key grooves distributed along the circumferential direction, and the key grooves are provided with mark characteristics; the mark features respectively correspond to the key grooves; when the iron cores are laminated, all the laminated iron cores of each section are arranged in the same way; after the laminated iron core is loaded with magnetic steel according to design requirements, when the laminated iron core is assembled with a rotating shaft and is laminated section by section along the axial direction of the rotating shaft, different key grooves are respectively matched with the rotating shaft keys, so that the laminated rotor iron core is changed once along the axial direction at intervals of a section of polarity direction, and the polarity angle of the rotor iron core is changed in stages.

2. The iron core punching sheet structure is used for realizing other iron core laminating modes except for an iron core torsion sheet controlled by matching of the skewed slot key groove and the key, and realizing that each iron core lamination sheet completing the stage along the axial direction is different in axial angle in the iron core laminating direction by selecting matching of different characteristic slots and the key, thereby realizing the torsion sheet function.

3. When the iron core is pressed into the rotating shaft according to different key groove numbers, due to the arrangement of the special rotor punching sheet functional grooves, the rivet heads leaking outwards when the iron core is laminated can mutually avoid into the related grooves of the iron core lamination adjacent to the rivet heads, mutual interference can not be generated, and fit gaps can not exist between the adjacent laminated iron cores.

4. The formed stage polarity is staggered, an inclined key groove structure is not arranged on the rotating shaft, a stage key groove is not arranged on the rotating shaft, and a traditional key groove and a key are still used.

Drawings

For a more clear understanding of the present invention, the present disclosure will be further described by reference to the drawings and illustrative embodiments which are provided for illustration and are not to be construed as limiting the disclosure.

FIG. 1 is a schematic view of a conventional rotor sheet;

FIG. 2 is a view of a conventional chute shaft;

FIG. 3 is a schematic view of FIG. 1 in cooperation with FIG. 2;

FIG. 4 is a sheet structure diagram of the present invention;

FIG. 5 is a front view of the core with magnetic steel incorporated therein;

FIG. 6 is a side view of the magnetic steel being installed in the core;

FIG. 7 is a structural view of a straight key groove employed in a conventional rotary shaft;

fig. 8 is a schematic view of several segments of fig. 5 and 7 assembled together.

Detailed Description

The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the utility model.

Example 1

The iron core punching sheet structure is used for realizing other iron core laminating modes except for an iron core torsion sheet controlled by matching a chute key groove and a key, and realizing that each iron core lamination completing the stage along the axial direction in the iron core laminating direction is different along the axial angle by selecting the matching of different characteristic grooves and the key, thereby realizing the torsion sheet function.

When the iron core punching sheet structure is laminated into an iron core, the position of the key groove of each section of the iron core is kept at a fixed position, namely all the iron cores are laminated to be the same when the magnetic steel is not installed.

When the iron core is pressed into the rotating shaft according to different key groove numbers, due to the arrangement of the special rotor punching sheet functional grooves, the rivet heads leaking outwards when the iron core is laminated can mutually avoid into the related grooves of the iron core lamination adjacent to the rivet heads, mutual interference can not be generated, and fit gaps can not exist between the adjacent laminated iron cores.

The formed stage polarity is staggered, an inclined key groove structure is not arranged on the rotating shaft, a stage key groove is not arranged on the rotating shaft, and a traditional key groove and a key are still used.

Example 2

The key groove of the traditional punching sheet structure and the effect of realizing the magnetic steel torsion sheet after the key groove is matched with the rotating shaft are shown in fig. 3, fig. 1 is a conventional rotor punching sheet key groove structure, fig. 2 is a conventional chute rotating shaft, and fig. 3 is a schematic diagram that the magnetic steel polarity on the outer side of the iron core is continuously kept consistent with the inclined direction of the rotating shaft key groove after the magnetic steel is loaded in the punching sheet magnetic steel groove after the assembly of fig. 1 and fig. 2.

Fig. 4 shows a rotor sheet keyway structure according to an embodiment of the present invention, which includes more than two keyway structures. The key groove with a plurality of key groove structures is distributed along the circumferential direction of the inner hole at a certain angle, and each key groove comprises an independent characteristic shape. The number of the key slots is the same as that of the laminated sections of the motor rotor core (namely, the core is laminated in sections, and then a plurality of key slots are formed).

When the structure punching sheet is used, referring to fig. 5 and 6, rivets are used according to design requirements, and the structure punching sheet is not limited to the rivets, and further comprises argon arc welding, buckling sheets, a self-buckling sheet structure and other measures, so that a certain number of punching sheets are laminated into a rotor core with a certain thickness.

The schematic diagrams of the polarity of the magnetic steel after the rotor core is installed with the magnetic steel refer to fig. 5 and 6.

After the rotor core is matched and assembled with the rotating shaft provided with the conventional key groove in the figure 7 according to different groove numbers in a segmented mode, for example, the rotor core is matched with the shaft according to the sequence of the groove numbers 1,2,3 and 4. The schematic diagram of magnetic steel polarity distribution is shown in fig. 8.

Through the mode, the punching sheet structure realizes the periodic polarity change along the axial direction after the rotor iron core is laminated.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The structure of the rotor core stamped sheet is characterized by comprising more than two characteristic grooves, wherein the characteristic grooves are designed into a plurality of key grooves distributed along the circumferential direction of the inner diameter of the stamped sheet; the number of the key slots is the same as the number of the segments of lamination of the punching sheets, namely the number of the key slots of the punching sheets is the same as the number of the segments of the iron core during assembly; the key grooves distributed along the circumferential direction of the inner diameter of the punching sheet are distributed at equal angles.