CN217087602U

CN217087602U - Block type iron core structure with embedded permanent magnets in outer rotor type motor rotor

Info

Publication number: CN217087602U
Application number: CN202220595870.8U
Authority: CN
Inventors: 王永胜; 李玉飞; 白明辉; 刘潇; 李景天
Original assignee: Dalian Zhi Ding Technology Co ltd
Current assignee: Dalian Zhi Ding Technology Co ltd
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2022-07-29
Anticipated expiration: 2032-03-18

Abstract

The utility model discloses an outer rotor type motor rotor embedded permanent magnet piece type iron core structure, which comprises a rotor iron core piece formed by laminating a plurality of fan-shaped rotor iron core pieces, wherein one side of the rotor iron core piece is provided with a tail groove structure, and the other side is provided with a head bulge structure; more than two containing grooves are formed in the fan-shaped rotor iron core sheet and used for containing permanent magnets, and glue injection holes communicated with the containing grooves are formed in two ends of each containing groove; and a plurality of rotor core splicing blocks are spliced into a circular rotor through the matching of the tail groove structure and the head protrusion structure. The laminated fan-shaped rotor core splicing block has the advantages that the size is small, the weight is light, raw materials are saved, the assembly and the disassembly can be independently realized, and the implementation is easy; and along with the continuous increase of rotor excircle, its manufacturing cost can not increase by a wide margin, convenient and practical.

Description

Outer rotor type motor rotor embedded permanent magnet block type iron core structure

Technical Field

The utility model relates to the technical field of motors, concretely relates to piece together formula iron core structure of embedded permanent magnet of outer rotor type electric motor rotor.

Background

In recent years, with the stability and improvement of the performance of permanent magnet materials, particularly the improvement of the thermal stability and corrosion resistance of the neodymium iron boron permanent magnet, the gradual reduction of the price and the further development of power electronic devices, and the gradual maturity of the research and development experience of the permanent magnet motor, the permanent magnet motor is more and more widely applied in the aspects of national defense, industrial and agricultural production, daily life and the like. Because the permanent magnet motor adopts permanent magnet excitation, multipolar realization is easy, higher efficiency and power factor characteristics can be kept in a wide load factor range, and the permanent magnet motor has incomparable advantages compared with an asynchronous motor.

At present, the rotor structure of a low-speed high-torque permanent magnet synchronous motor mainly has two magnetic circuits, one is a surface-mounted magnetic circuit structure, namely a permanent magnet is tile-shaped and is fixed on the outer surface of a rotor core; generally, the middle part of the permanent magnet is fastened by a screw or an interelectrode batten, but most of the permanent magnet is exposed outside, so that the permanent magnet is very easy to be broken by external force or self defects in the production and operation processes to cause motor operation failure; a non-magnetic cylinder which plays a role in protection is sleeved between the outer surface of the permanent magnet and the inner circle of the stator core, or a protective layer is formed by winding a weftless glass ribbon, carbon fiber and the like on the outer surface of a magnetic pole of the permanent magnet, so that the permanent magnet is protected, but the operation is more complex, the practicability is greatly reduced along with the increase of the outer circle of the motor rotor, and the cost is higher; in addition, because the surface-mounted magnetic circuit structure has smaller magnetic leakage, the influence degree of the permanent magnet by the armature reaction is increased, and the permanent magnet is easy to generate demagnetization under high-temperature strong demagnetization current. The other type is a built-in magnetic circuit, namely, the permanent magnets are embedded into the stacked rotor punching sheets, the rotor punching sheets have more complex structures, thick and heavy punching sheets and high manufacturing cost, and more built-in tangential rotor magnetic circuit structures of the multi-pole motor are adopted; the magnetic leakage coefficient caused by the structural characteristics is large, the material utilization rate, particularly the utilization rate of a permanent magnet material, is generally low, the process cost is improved if special magnetic isolation measures are adopted, and the production cost is greatly increased along with the continuous increase of the excircle of the motor rotor.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned not enough that exists among the prior art, the utility model provides an embedded permanent magnet of outer rotor type electric motor rotor piece formula iron core structure, its manufacturing cost who reduces rotor core by a wide margin implements simple and conveniently.

In order to achieve the purpose, the application provides a spliced iron core structure of an embedded permanent magnet of an outer rotor type motor rotor, which comprises a rotor iron core spliced block formed by laminating a plurality of fan-shaped rotor iron core sheets, wherein one side of the rotor iron core spliced block is provided with a tail groove structure, and the other side of the rotor iron core spliced block is provided with a head protrusion structure; more than two holding tanks are arranged on the fan-shaped rotor core sheet and used for holding permanent magnets, and glue injection holes communicated with the holding tanks are formed in two ends of each holding tank respectively.

Furthermore, a plurality of rotor core splicing blocks are matched with the head protruding structure through the tail groove structure to be spliced into a circular rotor.

Furthermore, the height of the plurality of fan-shaped rotor iron core sheets which are overlapped together is integral multiple of the permanent magnet.

Further, any two adjacent permanent magnets embedded in the accommodating groove have opposite polarities, that is, N, S poles are alternately arranged.

Furthermore, resin glue is poured into the glue injection holes and used for fixing the permanent magnet.

Furthermore, a plurality of through holes are formed in the fan-shaped rotor iron core sheets, and the threaded pins penetrate through the through holes to fixedly connect the fan-shaped rotor iron core sheets.

Further, more than two receiving grooves are uniformly distributed along the circumferential surface on the segment rotor core pieces.

Furthermore, the thickness of the fan-shaped rotor core plate is 0.5 mm.

The utility model discloses an above technical scheme, compare with prior art, the advantage that has is: the laminated fan-shaped rotor core splicing blocks are formed by combining the rotor core splicing blocks formed by laminating a plurality of fan-shaped rotor core pieces end to end, the structural form of the outer rotor of the common permanent magnet motor is changed, the laminated fan-shaped rotor core splicing blocks are small in size and light in weight, raw materials are saved, and the laminated fan-shaped rotor core splicing blocks can be independently disassembled and assembled and are easy to implement; and along with the continuous increase of rotor excircle, its manufacturing cost can not increase by a wide margin, has reduced rotor core's manufacturing cost, convenient and practical.

Drawings

FIG. 1 is an axial cross-sectional view of a plurality of rotor core segments joined together;

FIG. 2 is an axial cross-sectional view of a single rotor core segment;

fig. 3 is a schematic structural view of a single segment rotor core plate.

Wherein: 1. afterbody groove structure, 2, permanent magnet, 3, threaded pin, 4, injecting glue hole, 5, head protruding structure, 6, holding tank.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the application, i.e., the embodiments described are only a subset of, and not all embodiments of the application. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

Example 1

As shown in fig. 1 to 3, the present embodiment provides a split block type iron core structure with permanent magnets embedded in an outer rotor type motor rotor, which includes a plurality of fan-shaped rotor iron core pieces, wherein the fan-shaped rotor iron core pieces preferably have a thickness of 0.5mm (other sizes may be selected according to actual needs), the stacked layers are integral multiples of the permanent magnets, more than two receiving grooves are uniformly distributed on the fan-shaped rotor iron core pieces along the circumferential surface, and a rectangular permanent magnet is placed in each receiving groove.

The permanent magnets are alternately embedded in the accommodating grooves according to N, S poles, glue is injected through the glue injection holes to fix the permanent magnets, and the permanent magnets are protected to reliably and stably run in the outer rotor motor.

A plurality of fan-shaped rotor core sheets can be connected together through self through holes by using threaded pins and are laminated into fan-shaped rotor core segments with the height of 50 mm. A plurality of fan-shaped rotor core pieces are connected end to end with the head protruding structure through the tail groove structure, and are assembled into a circular rotor, so that the circular rotor has good implementability, and the production cost of the rotor core is greatly reduced.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. A piece type iron core structure of a permanent magnet embedded in an outer rotor type motor rotor is characterized by comprising a rotor iron core piece formed by laminating a plurality of fan-shaped rotor iron core pieces, wherein one side of the rotor iron core piece is provided with a tail groove structure, and the other side of the rotor iron core piece is provided with a head protrusion structure; more than two holding tanks are arranged on the fan-shaped rotor core sheet and used for holding permanent magnets, and glue injection holes communicated with the holding tanks are formed in two ends of each holding tank respectively.

2. The outer rotor-type motor rotor embedded permanent magnet segment core structure as claimed in claim 1, wherein a plurality of said rotor core segments are assembled into a circular rotor by means of the engagement of the tail slot structure and the head protrusion structure.

3. The outer rotor-type motor rotor embedded permanent magnet segmented iron core structure as claimed in claim 1, wherein the height of the plurality of segment-shaped rotor iron core pieces stacked together is an integral multiple of the permanent magnet.

4. The outer rotor-type motor rotor embedded permanent magnet segmented iron core structure as claimed in claim 1, wherein any two adjacent permanent magnets embedded in the receiving groove have opposite polarities.

5. The outer rotor-type motor rotor embedded permanent magnet segmented iron core structure as claimed in claim 1, wherein the resin paste is filled in the paste injection holes for fixing the permanent magnets.

6. The outer rotor-type motor rotor embedded permanent magnet segmented core structure as claimed in claim 1, wherein a plurality of through holes are formed on the segment-shaped rotor core pieces, and a screw pin penetrates through the through holes to fixedly connect the segment-shaped rotor core pieces.

7. The outer rotor-type motor rotor embedded permanent magnet segmented core structure as claimed in claim 1, wherein two or more receiving slots are uniformly distributed along a circumferential surface on the segment-shaped rotor core pieces.

8. The outer rotor-type motor rotor embedded permanent magnet segmented iron core structure as claimed in claim 1, wherein the thickness of the segment-shaped rotor core plate is 0.5 mm.