CN214228093U

CN214228093U - Copper-aluminum doped motor squirrel cage bar structure

Info

Publication number: CN214228093U
Application number: CN202023168038.XU
Authority: CN
Inventors: 刘春波; 胡凯; 余丹
Original assignee: Hangzhou Weiguang Electronic Co Ltd
Current assignee: Hangzhou Weiguang Electronic Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-09-17
Anticipated expiration: 2030-12-24

Abstract

The utility model discloses a copper aluminium dopes motor squirrel cage bar structure, including rotor core, copper bar and squirrel cage casting, be equipped with a plurality of mounting hole on the rotor core, the copper bar passes the crooked back in mounting hole and copper bar both ends and contacts with rotor core both ends, and the squirrel cage casting is the integrated casting shaping structure with iron core and copper bar. The utility model provides a copper aluminium dopes motor squirrel cage bar structure can improve electric motor rotor electric conductive property, improves the whole efficiency of motor, and the copper bar both ends are crooked, can avoid the copper bar position to take place the skew when the bulk casting.

Description

Copper-aluminum doped motor squirrel cage bar structure

Technical Field

The utility model belongs to the technical field of the motor technique and specifically relates to a copper aluminium dopes motor squirrel cage bar structure.

Background

The squirrel-cage asynchronous motor has simple structure and convenient manufacture, is an economic and durable motor, and in order to improve the efficiency of the motor, the rotor of the large and medium-sized motor mostly adopts a structure that a copper bar is inserted into a groove of a rotor core and end rings are welded at two ends. Therefore, the application provides a copper aluminium mixes motor squirrel cage bar structure, can improve motor rotor electric conductivity nature, improves the whole efficiency of motor.

The Chinese patent application publication No. CN107222070A, published as 09.29.2017, entitled "processing method of segmented rotor of compact asynchronous starting permanent magnet synchronous motor", discloses a processing method of segmented rotor of compact asynchronous starting permanent magnet synchronous motor, a. electromagnetic design structure; b. performing structural mechanical accounting according to the three-dimensional structural simulation computing software; c. the squirrel cage copper bar size in the motor design is taken as a reference, and the squirrel cage copper bar is axially sleeved at a specified position along the squirrel cage copper bar for compressing and fixing; d. embedding the segmented magnetic steel sheets into the mounting notches of the magnetic steel sheets in the I; e. repeating the method in the step (d), thereby respectively completing the connection and the assembly of the five rotor parts II to VI; f. stacking the prepared rotor rear end plate on the last squirrel cage copper bar, compressing, fixing and wiping dust; g. inserting the prepared four threaded pull rods into the fixed mounting holes to fix the rotor punching sheet; h. and welding and forming the copper ring. However, the above problems still exist in this processing method.

Disclosure of Invention

The utility model discloses an overcome among the prior art motor squirrel cage bar structure welding degree of difficulty big, the joint strength of copper bar and end links is low, the copper bar is not tight real problem enough with being connected of end links, provides a copper aluminium dopes motor squirrel cage bar structure, can improve electric motor rotor electric conductive property, improves the whole efficiency of motor, and the copper bar both ends are crooked, can avoid the copper bar position to take place the skew when the bulk casting.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a squirrel cage bar structure of a copper-aluminum doped motor comprises a rotor core, copper bars and a squirrel cage casting body, wherein a plurality of mounting holes are formed in the rotor core, the copper bars penetrate through the mounting holes and are contacted with the two ends of the rotor core after the two ends of the copper bars are bent, and the squirrel cage casting body, the iron core and the copper bars are of an integrally cast structure.

According to the technical scheme, after the rotor iron core is installed in the copper bar, two ends of the rotor iron core are flattened and then are placed in a die-casting die to be molded at one time. The conductive performance of the motor rotor can be improved, the overall efficiency of the motor is improved, the two ends of the copper bar are bent, and the position of the copper bar can be prevented from being deviated during integral casting.

Preferably, the material of the squirrel cage casting body is aluminum.

Preferably, the size of the mounting hole is larger than that of the copper bar. The structure is convenient for analyzing molten aluminum in a molten state during casting, so that all parts are tightly combined.

Preferably, the squirrel cage casting body fills the gap between the mounting hole and the copper bar. The structure can ensure that the connection among the rotor iron core, the copper bars and the squirrel cage casting body is more compact and reliable.

Preferably, the mounting hole is obliquely formed in the rotor core.

Preferably, the mounting holes are uniformly distributed along the circumferential direction of the rotor core.

Preferably, a notch is provided inside an end surface of the rotor core. The structure can enable aluminum liquid to flow into the notch during casting, and the structural strength is improved. Rotor core, copper bar and squirrel cage casting

Preferably, the notch communicates with the mounting hole. The structure can lead the aluminum liquid to flow into the mounting hole through the gap during casting and is convenient for the gas in the mounting hole to be discharged.

The utility model has the advantages that: (1) the conductivity of the motor rotor can be improved, and the overall efficiency of the motor is improved; (2) the two ends of the copper bar are bent, so that the position of the copper bar can be prevented from being deviated during integral casting; (3) the rotor iron core, the copper bars and the squirrel cage casting body are connected tightly and reliably.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of the rotor core and the copper bar after being mounted;

fig. 3 is a cross-sectional view of the middle rotor core and the copper bar after being installed.

In the figure: rotor core 1, mounting hole 1.1, breach 1.2, copper bar 2, squirrel cage cast body 3.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments.

Example 1:

as shown in fig. 1, 2 and 3, the copper-aluminum doped squirrel cage bar structure of the motor comprises a rotor core 1, copper bars 2 and a squirrel cage casting body 3, wherein the squirrel cage casting body 3 is made of aluminum ADC12, the rotor core 1 is provided with a plurality of mounting holes 1.1, the mounting holes 1.1 are obliquely arranged on the rotor core 1, and the mounting holes 1.1 are uniformly distributed along the circumferential direction of the rotor core 1; the copper bars 2 correspond to the mounting holes 1.1 one by one, the copper bars 2 penetrate through the corresponding mounting holes 1.1, two ends of each copper bar 2 are bent and then are in contact with two ends of the rotor iron core 1, and the size of each mounting hole 1.1 is larger than that of each copper bar 2; a notch 1.2 is arranged on the inner side of the end face of the rotor iron core 1; the gap 1.2 is communicated with the mounting hole 1.1; the squirrel cage casting body 3, the iron core and the copper bars 2 are of an integral casting structure. The squirrel cage cast body 3 fills the gap between the mounting hole 1.1 and the copper bar 2.

According to the technical scheme, after the rotor iron core 1 is filled into the copper bar 2, two ends of the rotor iron core are flattened and then are placed into a die-casting die to be molded at one time. The conductive performance of the motor rotor can be improved, the overall efficiency of the motor is improved, the two ends of the copper bar 2 are bent, and the position of the copper bar 2 can be prevented from being deviated during integral casting. When casting, the aluminum liquid flows into the mounting hole 1.1 through the notch 1.2, and the gas in the mounting hole 1.1 can be discharged conveniently.

Claims

1. A squirrel cage bar structure of a copper-aluminum doped motor is characterized by comprising a rotor core, copper bars and a squirrel cage casting body, wherein a plurality of mounting holes are formed in the rotor core, the copper bars penetrate through the mounting holes, the two ends of the copper bars are bent and then are contacted with the two ends of the rotor core, and the squirrel cage casting body, the iron core and the copper bars are of an integrally cast structure.

2. The copper-aluminum doped motor cage bar structure of claim 1, wherein the material of the cage casting is aluminum.

3. The copper-aluminum doped motor cage bar structure of claim 1, wherein the size of the mounting hole is larger than the size of the copper bar.

4. The copper-aluminum doped motor cage bar structure of claim 3, wherein the cage casting fills the gap between the mounting hole and the copper bar.

5. The structure of the copper-aluminum doped motor cage bar of claim 1, 2, 3 or 4, wherein the mounting holes are obliquely arranged on the rotor core.

6. The structure of the copper-aluminum doped motor cage bar of claim 1, 2, 3 or 4, wherein the mounting holes are uniformly distributed along the circumferential direction of the rotor core.

7. The structure of the squirrel cage bar of the copper-aluminum doped motor as claimed in claim 1, 2, 3 or 4, wherein the inner side of the end surface of the rotor core is provided with a notch.

8. The copper-aluminum doped motor cage bar structure of claim 7, wherein the notch is in communication with the mounting hole.