CN107749699B

CN107749699B - Rotor machining method

Info

Publication number: CN107749699B
Application number: CN201711116453.0A
Authority: CN
Inventors: 齐秀秀; 向东; 付清轩
Original assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Current assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Priority date: 2017-11-13
Filing date: 2017-11-13
Publication date: 2020-11-17
Anticipated expiration: 2037-11-13
Also published as: CN107749699A

Abstract

The invention discloses a processing method of a rotor, which comprises the following steps: s10: fixing two end rings on two axial sides of a rotor core respectively through connecting pieces, wherein a plurality of rotor grooves which are arranged at intervals are arranged on a rotor, through holes are respectively arranged on the two end rings, and each rotor groove on the fixed rotor core is provided with a through hole which is correspondingly communicated with at least one of the two end rings; s20: placing the two fixed end rings and the rotor iron core in a casting mold, wherein the casting mold is provided with a casting opening which is opposite to at least one through hole; s30: and injecting the metal solution into the through hole and the rotor groove communicated with the through hole from the casting opening, and forming a first rotor conducting bar by the metal solution after cooling. According to the rotor processing method provided by the embodiment of the invention, when the rotor conducting bar is poured, the two end rings do not move, the fluidity of the metal solution is improved, and the fraction defective of the first rotor conducting bar after cooling is reduced.

Description

Rotor machining method

Technical Field

The invention relates to the technical field of motors, in particular to a rotor machining method.

Background

When the compressor uses the copper-aluminum composite rotor, the end ring is a copper end ring, the rotor conducting bar is an aluminum bar, the copper end ring which is easy to be led out during the manufacturing process is moved, the circulation of the aluminum liquid is influenced, finally, the manufacturing problems of bar breakage and the like occur after the rotor is cooled, and the reject ratio is improved.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the rotor and the processing method, the rotor is processed by the processing method, the rotor conducting bars are not easy to break, and the reject ratio is low.

The processing method of the rotor comprises the following steps:

s10: fixing two end rings on two axial sides of a rotor core respectively through connecting pieces, wherein a plurality of rotor grooves which are arranged at intervals are arranged on the rotor, through holes are respectively arranged on the two end rings, and each rotor groove on the rotor core is correspondingly communicated with the through hole on at least one of the two end rings after the rotor grooves are fixed;

s20: placing the two fixed end rings and the rotor iron core in a casting mold, wherein a casting opening which is opposite to at least one through hole is formed in the casting mold;

s30: and injecting a metal solution into the through hole and the rotor groove communicated with the through hole from the casting opening, and forming a first rotor conducting bar by the metal solution after cooling.

According to the rotor processing method provided by the embodiment of the invention, the two end rings are fixed on the two axial sides of the rotor iron core by the connecting pieces before pouring, so that the two end rings do not move during pouring, the fluidity of metal solution is improved, and the fraction defective of the first rotor conducting bar after cooling is reduced.

In some embodiments, in step S10, the connectors are inserted into the rotor slots and the through holes communicating with the rotor slots to fix the two end rings on the rotor core.

Optionally, the connecting piece is fitted in the rotor groove, and two ends of the connecting piece extend into the through holes on the two end rings, and at least one end of the connecting piece is in interference fit connection with the through holes on the two end rings.

Optionally, the connecting element is not removed after step S30, and the connecting element constitutes a second rotor bar of the rotor.

Optionally, the number of the connecting members is multiple, and the connecting members are distributed on the rotor core in a central symmetry manner.

In some embodiments, the through holes on at least one of the end rings are arranged in one-to-one correspondence with the plurality of rotor slots.

In some embodiments, in step S20, the casting mold includes a lower mold and an upper mold, the two fixed end rings and the rotor core are vertically disposed, the lower mold abuts against the lower end ring, and the upper mold abuts against the upper end ring.

Specifically, the through holes on the upper end ring are arranged in one-to-one correspondence with the rotor grooves, the connecting piece extending to the rotor groove is arranged in at least one through hole on the upper end ring, and the pouring gate on the upper die is communicated with the other through holes except the through hole provided with the connecting piece.

In some embodiments, in step S30, the metal solution is formed into the first rotor bar by centrifugal casting or die casting.

In some embodiments, the connector is a copper bar.

In some embodiments, the metal solution is aluminum liquid.

In some embodiments, the two end rings are each copper end rings.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an overall structure of a rotor of an embodiment of the present invention.

Fig. 2 is a top view of a rotor of an embodiment of the present invention.

Reference numerals:

a rotor 100,

Rotor core 110, rotor slot 111,

An end ring 120, a through hole 121,

A first rotor conducting bar 130,

A connecting member 140, and a second rotor bar 141.

A casting mold 200,

Upper die 210 and lower die 220

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A method of machining a rotor according to an embodiment of the present invention will be described below with reference to fig. 1 to 2.

The processing method of the rotor comprises the following steps:

s10: fixing two end rings 120 on two axial sides of the rotor core 110 through connectors 140, respectively, wherein a plurality of rotor slots 111 arranged at intervals are arranged on the rotor 100, through holes 121 are arranged on the two end rings 120, respectively, and each rotor slot 111 on the fixed rotor core 110 has a through hole 121 correspondingly communicated with at least one of the two end rings 120;

s20: placing the two fixed end rings 120 and the rotor core 110 in a casting mold 200, wherein a casting gate which is opposite to at least one through hole 121 is arranged on the casting mold 200;

s30: the metal solution is poured into the through hole 121 and the rotor groove 111 communicating with the through hole 121 from the casting gate, and the metal solution forms the first rotor lead 130 after cooling.

It can be understood that in the method for processing a rotor according to the embodiment of the present invention, the two end rings 120 are fixed to the two axial sides of the rotor core 110 by the connectors 140 before casting, so that the two end rings 120 do not move in the subsequent casting process, the fluidity of the metal solution is better during casting, and the fraction defective of the first rotor conducting bars 130 after cooling is reduced.

According to the processing method of the rotor in the embodiment of the invention, before casting, the two end rings 120 are fixed on the two axial sides of the rotor core 110 by the connecting piece 140, so that the two end rings 120 do not move during casting, the fluidity of the metal solution is improved, and the fraction defective of the first rotor conducting bars 130 after cooling is reduced.

In some embodiments, in step S10, the connectors 140 are inserted into the rotor slots 111 and the through holes 121 communicating with the rotor slots 111 to fix the two end rings 120 to the rotor core 110. This is simple and easy to fix, and the two end rings 120 are well fixed, that is, the fixing method can well fix the two end rings 120 on the rotor core 110.

Alternatively, the connectors 140 are fitted in the rotor grooves 111, and both ends of the connectors 140 extend into the through holes 121 of the two end rings 120, and at least one end of the connector 140 is connected with the through holes 121 of the two end rings 120 in an interference fit manner. It will be appreciated that the interference fit is simple to assemble, requiring no additional fasteners, and simplifies the preparation of the rotor 100 prior to casting. In addition, the connectors 140 are fitted in the rotor grooves 111, and both ends of the connectors 140 protrude into the through-holes 121 of both end rings 120 to better fix the end rings 120. Of course, the connectors 140 in other embodiments of the present invention may also be formed in other forms, for example, in some embodiments, the connectors are formed in two, and the two connectors are respectively fitted in the through holes 121 of the two end rings 120 to fix the two end rings 120 on the rotor core 110.

Alternatively, as shown in fig. 2, the connection member 140 is not removed after step S30, and the connection member 140 constitutes the second rotor bar 141 of the rotor 100. Therefore, the connecting member 140 does not need to be disassembled after the casting is completed, and the production process of the rotor 100 is simplified. Of course, in other embodiments of the present invention, the connection member 140 may be removed after step S30, and the rotor core 110 may be cast a second time.

Alternatively, as shown in fig. 2, the number of the connecting members 140 is multiple, and the connecting members 140 are distributed on the rotor core 110 in a central symmetry manner. This improves the stability of the connection between the end ring 120 and the rotor core 110, and prevents the end ring 120 from moving.

In some embodiments, the through holes 121 on at least one end ring 120 are arranged in a one-to-one correspondence with the plurality of rotor slots 111. Thus, the end rings 120, in which the through holes 121 are arranged in one-to-one correspondence to the plurality of rotor grooves 111, are one end to which the metal solution is poured at the time of pouring, so that the first rotor lead 130 can be formed in a single pouring.

It should be noted that in some embodiments, the number of the through holes 121 on both end rings 120 is less than that of the rotor slots 111, but each rotor slot 111 has at least one through hole 121 connected thereto, in which case, the first rotor bar 130 needs to be molded at least twice.

In some embodiments, as shown in fig. 1, in step S20, the casting mold 200 includes a lower mold 220 and an upper mold 210, the two fixed end rings 120 and the rotor core 110 are vertically disposed, the lower mold 220 abuts against the lower end ring 120, and the upper mold 210 abuts against the upper end ring 120. Therefore, the end ring 120 is further ensured not to move in the casting process, and the quality of the first rotor conducting bar 130 is ensured.

Specifically, the through holes 121 on the upper end ring 120 are arranged in one-to-one correspondence with the plurality of rotor grooves 111, a connecting member 140 extending to the rotor grooves 111 is arranged in at least one through hole 121 on the upper end ring 120, and the pouring gate on the upper die 210 is communicated with the other through holes 121 except the connecting member 140. Therefore, in the casting process, only the metal solution needs to be injected into the casting opening of the upper film, that is, the first rotor conducting bar 130 can be completely molded in one casting, and the production process of the first rotor conducting bar 130 is simplified.

In some embodiments, in step S30, the metal solution is centrifugally or die cast to form the first rotor bar 130. Thereby, the casting quality of the first rotor bar 130 may be improved.

In some embodiments, the connection 140 is a copper bar. Thus, the connection member 140 formed as the copper bar may be formed as the second rotor bar 141 without disassembling the connection member 140 after the casting is completed.

In some embodiments, the metal solution is aluminum liquid. The temperature of the aluminum liquid is low, so that the insulating coating on the surface of the iron core is not easy to damage, and the insulation degree between the silicon steel sheets forming the rotor iron core 110 is ensured.

In some embodiments, the two end rings 120 are each copper end rings 120. This reduces the height of the end of the rotor 100, reduces the size of the rotor 100, and widens the practical range of the rotor 100.

A method of processing a rotor according to an embodiment of the present invention will be described.

S10: fixing two end rings 120 on two axial sides of the rotor core 110 through connectors 140;

s20: placing the two fixed end rings 120 and the rotor core 110 in a casting mold 200;

S40: and (5) finishing pouring.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The processing method of the rotor is characterized by comprising the following steps:

s10: fixing two end rings on two axial sides of a rotor core respectively through connecting pieces, wherein a plurality of rotor grooves which are arranged at intervals are arranged on the rotor, the connecting pieces are matched in the rotor grooves, two ends of each connecting piece extend into through holes on the two end rings, and at least one end of each connecting piece is connected with the through holes on the two end rings in an interference fit manner; through holes are respectively formed in the two end rings, and each rotor slot in the fixed rotor core is provided with the through hole which is correspondingly communicated with at least one of the two end rings; the link extends from the at least one through hole of the end ring above down into the rotor slot; the number of the through holes on the two end rings is less than that of the rotor grooves, and each rotor groove is communicated with at least one through hole; the connecting piece is inserted into the rotor slot and the through hole communicated with the rotor slot so as to fix the two end rings on the rotor core;

s20: placing the two fixed end rings and the rotor iron core in a casting mold, wherein a casting opening which is opposite to at least one through hole is formed in the casting mold; the two end rings are copper end rings respectively;

s30: injecting a metal solution into the through hole and the rotor groove communicated with the through hole from the casting opening, wherein the metal solution forms a first rotor guide bar after cooling, and the metal solution is aluminum liquid; the connecting piece does not remove, the connecting piece constitutes the second rotor conducting bar of rotor, the connecting piece is the copper conducting bar.

2. The method of claim 1, wherein the connecting members are provided in plural numbers, and the plural connecting members are arranged on the rotor core in a central symmetrical manner.

3. The method of claim 1, wherein the through-holes of at least one of the end rings are provided in one-to-one correspondence with the plurality of rotor slots.

4. The method of claim 1, wherein in step S20, the casting mold comprises a lower mold and an upper mold, the two fixed end rings and the rotor core are vertically arranged, the lower mold abuts against the lower end ring, and the upper mold abuts against the upper end ring.

5. The method of claim 4, wherein the through holes of the upper end ring are provided in one-to-one correspondence with the plurality of rotor grooves, and the casting openings of the upper mold communicate with the through holes except for the connecting members.

6. The method of manufacturing a rotor according to claim 1, wherein the metal solution is formed into the first rotor bar by centrifugal casting or die casting in step S30.