CN218301042U

CN218301042U - Cast aluminum rotor assembly of permanent magnet synchronous motor

Info

Publication number: CN218301042U
Application number: CN202221936106.9U
Authority: CN
Inventors: 王根才; 詹学健
Original assignee: Wuhan Anlansi Electric Technology Co ltd
Current assignee: Wuhan Anlansi Electric Technology Co ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2023-01-13
Anticipated expiration: 2032-07-25

Abstract

The utility model provides a permanent magnet synchronous motor cast aluminum rotor component, which comprises a rotor core, a fixed cage and two balance end rings; the rotor core comprises a plurality of iron core sheets which are stacked to form a cylindrical structure, a plurality of permanent magnet grooves and cast aluminum grooves which are axially arranged are formed in the rotor core, and strip-shaped permanent magnets are arranged in the permanent magnet grooves; the fixing cage comprises a plurality of cast aluminum strips and two cast aluminum rings, the cast aluminum strips are arranged in the cast aluminum grooves, and the two cast aluminum rings are arranged at two ends of the rotor core and connected with all the cast aluminum strips. The utility model has the advantages that: the cast aluminum strip and the cast aluminum ring of the cast aluminum rotor component of the motor are cast and connected into a whole to fix the rotor core, so that the number of components of the motor rotor component can be reduced, the assembly steps can be simplified, and the volume and the manufacturing cost of the whole motor can be reduced; meanwhile, a fixing cage of the motor cast-aluminum rotor assembly is made of aluminum, and lightening holes are formed in a rotor core, so that the motor rotor is convenient to lighten.

Description

Cast aluminum rotor assembly of permanent magnet synchronous motor

Technical Field

The utility model relates to a motor device technical field especially relates to a permanent magnet synchronous motor casts aluminium rotor subassembly.

Background

The conventional permanent magnet motor rotor structure generally adopts a rotor support, silicon steel sheets are sleeved on the rotor support and are stacked together to form a rotor core, then a permanent magnet is embedded on the surface or the inner wall of the rotor core, end plates are arranged at two ends of the rotor core at the left rear, and the end plates are axially locked by a round nut and a stop washer so that the silicon steel sheets are compressed. Such structure has not only increased the fitting surface and has assembled spare part to its processing and material cost are all higher, form the step easily moreover between the silicon steel sheet, and the assembly of being inconvenient, and spider is as the transmission moment of torsion carrier simultaneously, and its intensity requires highly, and the whole electric motor rotor's of being inconvenient for subtracts heavily.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a cast aluminum rotor assembly for a permanent magnet synchronous motor, which includes a rotor core, a stationary cage and two balance end rings;

the rotor core comprises a plurality of iron chips which are stacked to form a cylinder structure, a plurality of permanent magnet grooves and cast aluminum grooves which are axially arranged are formed in the rotor core, and strip-shaped permanent magnets are arranged in the permanent magnet grooves;

the fixed cage includes a plurality of cast aluminium strips and two cast aluminium rings, cast aluminium strip set up in cast aluminium inslot, two cast aluminium ring set up in rotor core both ends, and two cast aluminium ring links to each other with the tip of all cast aluminium strips.

Further, the rotor core axis is provided with a shaft mounting hole.

Further, a mounting key groove is formed in the inner wall of the shaft mounting hole.

Further, all the cast aluminum grooves are uniformly arranged around the shaft mounting hole.

Further, the end faces of the two balance end rings are provided with balance holes for mounting balance screws.

Furthermore, a plurality of axially arranged weight reduction grooves are formed in the rotor core, and all the weight reduction grooves are uniformly arranged around the shaft mounting hole.

Furthermore, pouring sealant is arranged at two ends in the permanent magnet groove, and the permanent magnet is sealed and fixed in the permanent magnet groove by the pouring sealant.

The utility model relates to a PMSM casts aluminium rotor subassembly's beneficial effect does: the rotor core of the motor cast-aluminum rotor assembly is formed by stacking iron chips made of silicon steel, an aluminum casting groove is formed in the rotor core, an aluminum casting strip and an aluminum casting ring which are cast by aluminum water are respectively arranged in the aluminum casting groove and at two ends of the aluminum casting groove, and the aluminum casting strip and the aluminum casting ring are cast into a whole, so that the rotor core is fixed, the number of components of the motor rotor assembly can be reduced, the assembly steps are reduced, and the volume and the manufacturing cost of the whole motor are reduced; meanwhile, the fixing part of the motor cast-aluminum rotor assembly is made of aluminum, and lightening holes are formed in the rotor iron core, so that the whole quality of the motor cast-aluminum rotor assembly is reduced under the strength condition of the motor cast-aluminum rotor assembly, and the motor meets the lightening requirement.

Drawings

Fig. 1 is a sectional view of a hoisting fixture for producing a stator core in a motor according to an embodiment of the present invention.

Fig. 2 isbase:Sub>A cross-sectional view taken atbase:Sub>A-base:Sub>A in fig. 1.

In the figure: 1-rotor iron core, 11-permanent magnet groove, 12-weight reduction groove, 13-cast aluminum groove, 2-fixing cage, 21-cast aluminum strip, 22-cast aluminum ring, 3-balance end ring, 4-permanent magnet, 5-balance screw and 6-shaft mounting hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.

Referring to fig. 1 to 2, a permanent magnet synchronous motor cast aluminum rotor assembly includes a rotor core 1, a fixing cage 2 and two balancing end rings 3;

the rotor core 1 comprises a plurality of iron core pieces, the iron core pieces are silicon steel sheets provided with permanent magnet holes, lightening holes and cast aluminum holes, all the iron core pieces are stacked together to form the rotor core 1 with a cylindrical structure, and the rotor core 1 is internally provided with a permanent magnet groove 11, a lightening groove 12 and a cast aluminum groove 13 which are respectively formed by the lightening holes, the cast aluminum holes and the permanent magnet holes. The permanent magnet slots 11, the weight reduction slots 12 and the cast aluminum slots 13 are all distributed along the axial direction of the rotor core 1 (namely the permanent magnet slots 11, the weight reduction slots 12 and the cast aluminum slots are all parallel to the axis of the rotor core 1), and strip-shaped permanent magnets 4 are arranged in the permanent magnet slots 13; the permanent magnets 4 make the rotor core 1 entirely magnetic.

Fixed cage 2 includes a plurality of cast aluminium strips 21 and two cast aluminium rings 22, cast aluminium strip 21 set up in cast aluminium inslot 13, two cast aluminium ring 22 set up in 1 both ends of rotor core, and two cast aluminium ring 22 and all cast the tip of aluminium strip 21 and link to each other, fixed cage 2 is pour through the aluminium water and is formed, fixed cage 2 is fixed all iron core pieces as a whole to improve 1 intensity of rotor core.

Further, the axis of the rotor core 1 is provided with a shaft mounting hole 6, and the inner wall of the shaft mounting hole 6 is provided with a mounting key groove. The shaft mounting hole 6 is used for mounting a motor rotating shaft, after the motor is electrified, the rotor core rotates relative to the motor stator, and the shaft mounting hole 6 is arranged on the body (on all iron chips) of the rotor core 1 through the motor rotating shaft to output torque, so that the connection strength of the motor rotating shaft can be enhanced.

Further, all the cast aluminum grooves 13 and all the lightening grooves 12 are uniformly arranged around the shaft mounting hole 6. In the present embodiment, all the lightening slots 12 are evenly arranged in two turns around the lightening slots 12.

Further, the end faces of the two balance end rings 3 are provided with balance holes, the balance holes are used for installing balance screws 5, and the balance screws 5 are used for correcting the dynamic balance characteristic of the rotor core 1.

Furthermore, pouring sealant is arranged at two ends in the permanent magnet groove 13, and the permanent magnet 4 is sealed and fixed in the permanent magnet groove by the pouring sealant.

The embodiment of the utility model provides a manufacturing process of permanent magnet synchronous motor cast aluminium rotor subassembly does: punching a permanent magnet hole, a lightening hole and an aluminum casting hole on an iron core sheet made of silicon steel; stacking the punched iron core pieces on an aluminum casting mold up and down to stack the iron core pieces into a rotor core 1, aligning permanent magnet holes, lightening holes and aluminum casting holes on all the iron core pieces up and down to form a permanent magnet groove 11, a lightening groove 12 and an aluminum casting groove 13 in the rotor core, injecting aluminum liquid into the aluminum casting groove 13 and the aluminum casting molds (the aluminum casting molds are used for casting aluminum rings 23) at the upper end and the lower end of the rotor core, cooling the aluminum liquid to form a fixed cage 2, fixing the iron core pieces into the rotor core 1 with an integral structure by the fixed cage 2, and then installing permanent magnets 4 in the permanent magnet groove 11 and sealing and fixing the iron core pieces by pouring sealant; connecting the two balance end rings 3 to the cast aluminum ring 22 in an interference fit manner, so that the two balance end rings 3 are positioned at two ends of the rotor core 1; and performing dynamic balance test on the rotor core 1, and balancing the rotor core 1 by a balance screw 5 to meet the dynamic balance requirement.

In this document, the terms front, back, upper, lower and the like in the drawings are used for the sake of clarity and convenience only for the components are located in the drawings and the positions of the components relative to each other. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a permanent magnet synchronous motor cast aluminium rotor subassembly which characterized in that: the rotor comprises a rotor iron core, a fixed cage and two balance end rings;

the fixed cage comprises a plurality of cast aluminum strips and two cast aluminum rings, the cast aluminum strips are arranged in the cast aluminum grooves, the two cast aluminum rings are arranged at two ends of the rotor core, and the two cast aluminum rings are connected with the end parts of all the cast aluminum strips.

2. The cast-aluminum rotor assembly of the permanent magnet synchronous motor according to claim 1, wherein: and a shaft mounting hole is formed in the axis of the rotor core.

3. The cast-aluminum rotor assembly of the permanent magnet synchronous motor according to claim 1, wherein: the inner wall of the shaft mounting hole is provided with a mounting key slot.

4. The cast-aluminum rotor assembly of the permanent magnet synchronous motor according to claim 2, wherein: all the cast aluminum grooves are uniformly arranged around the shaft mounting hole.

5. The cast-aluminum rotor assembly of the permanent magnet synchronous motor according to claim 1, wherein: and the end faces of the two balance end rings are provided with balance holes for mounting balance screws.

6. The cast-aluminum rotor assembly of the permanent magnet synchronous motor according to claim 2, wherein: and a plurality of weight reduction grooves which are axially arranged are arranged in the rotor core, and all the weight reduction grooves are uniformly arranged around the shaft mounting hole.

7. The cast-aluminum rotor assembly of the permanent magnet synchronous motor according to claim 1, wherein: and pouring sealants are arranged at two ends in the permanent magnet grooves, and the permanent magnets are sealed and fixed in the permanent magnet grooves by the pouring sealants.