CN109861466A

CN109861466A - The Joining Technology of cage induction motor copper bar and end ring

Info

Publication number: CN109861466A
Application number: CN201910266847.7A
Authority: CN
Inventors: 黄伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-03
Filing date: 2019-04-03
Publication date: 2019-06-07
Anticipated expiration: 2039-04-03
Also published as: CN109861466B

Abstract

The Joining Technology of cage induction motor copper bar and end ring, the present invention come the shortcomings that overcoming traditional squirrel-cage asynchronous motor rotor copper bar and end ring Joining Technology, is opened that a bellmouth is opened in the corresponding each copper bar end point of a cross recess, end ring, each copper bar is all inserted into the end face of rotor bar first and passes through corresponding bellmouth on end ring, copper bar is made tightly to be connected with the surface of end ring bellmouth by the stress that copper bar top deforms, to improve the bonding strength of copper bar and end ring, finally weld again to copper bar and end ring by a kind of novel processing technology.

Description

The Joining Technology of cage induction motor copper bar and end ring

Technical field

The present invention relates to the processing technologys that squirrel cage asynchronous motor copper bar is connected with end ring.

Background technique

Squirrel cage asynchronous motor structure is simple, easily manufactured, is a kind of economic, durable motor, in order to improve motor effect Rate, the rotor of large and middle size motor mostly uses greatly in the slot of copper bar insertion rotor core, burn-ons the structure of end ring at both ends again, tradition The copper bar technique that is connected with end ring be that fluting, copper bar are protruded into slot and welded again on end ring, the disadvantage is that welding difficulty is big, copper Item is low with the bonding strength of end ring, the copper bar and end ring inadequate consolidation of joint face.

Summary of the invention

The present invention overcomes traditional squirrel-cage asynchronous motor rotor copper bar and end ring to connect by a kind of novel processing technology The shortcomings that connecing technique opens the corresponding each copper bar end point of a cross recess, end ring to the end face of rotor bar first and opens one Bellmouth, each copper bar be all inserted into and pass through corresponding bellmouth on end ring, made by the stress that copper bar top deforms copper bar with The surface of end ring bellmouth is tightly connected, the bonding strength to improve copper bar and end ring, finally carries out again to copper bar and end ring Welding.

Concrete methods of realizing is as follows

A cross recess (Fig. 1) is opened to the end face of each rotor bar of squirrel cage asynchronous motor first, the depth of slot is more than or equal to The angle cut when the thickness of end ring, fluting is slightly slanted the end face in motor copper bar, forms a cross recess wide outside and narrow inside Hole (Fig. 2), on the one hand another aspect reduction easy to process cuts camber to the destruction of copper bar end intensity, the periphery acute angle of end End ring (Fig. 3) is facilitated insertion into, then to the end ring aperture (Fig. 4) of squirrel cage asynchronous motor, the corresponding each copper bar end of end ring Place opens a bellmouth (Fig. 5), the perforated area of copper bar end inserting surface of bellmouth is slightly less than the sectional area at copper bar center and makes Bellmouth on copper bar and end ring, which is formed, to be interference fitted, and the copper bar end of bellmouth inserts the perforated area appeared and is less than bellmouth The perforated area of copper bar end inserting surface but be greater than copper bar end sectional area, make copper bar end insertion end ring bellmouth after Deformation retract and the bellmouth that can be pierced by end ring, motor copper bar are directed at each bellmouth on end ring after being fixed on rotor core Each copper bar end makes each bellmouth, percussion end ring on copper bar end insertion end ring become the cross recess of motor copper bar end Shape is shunk, the stress of copper bar top deformation makes copper bar tightly be connected with the surface of end ring bellmouth, to improve copper bar and end ring Bonding strength, copper bar again welds copper bar and end ring after being pierced by end ring bellmouth.

Detailed description of the invention

It is cross recess that Fig. 1, which is plan view after cross recess is opened in motor copper bar end face, (1),.

It is the inner wall of cross recess that Fig. 2, which is the lateral sectional view of motor copper bar, (2),.

Fig. 3 is that the periphery acute angle cutting top cross-sectional view of camber of motor copper bar end, (3) are that the inner wall of cross recess, (4) are The arc side of copper bar end.

Fig. 4 is that the plan view of electric machine end ring, (5) are bellmouths on end ring.

It is the inner wall of bellmouth, (7) is that the copper bar end of bellmouth is inserted that Fig. 5, which is the sectional view of electric machine end ring bellmouth, (6), Enter face, (8) be bellmouth copper bar end insert appear.

Claims

1. claim 1

The connection method of squirrel-cage asynchronous motor rotor copper bar and end ring, it is characterized in that the squirrel-cage asynchronism containing copper bar and end ring Rotor, copper bar are connected in a manner of being inserted into end ring, open one to the end face of each rotor bar of squirrel cage asynchronous motor first A cross recess (Fig. 1), slot depth when being more than or equal to the thickness of end ring, fluting the angle cut be slightly slanted in rotor bar End face forms the another aspect reduction easy to process of a cross slot (Fig. 2) wide outside and narrow inside, one side to copper bar end intensity Destroy, the periphery acute angle of copper bar end cutting camber facilitates insertion into end ring (Fig. 3), then to the rotor of squirrel cage asynchronous motor The copper bar end insertion an of bellmouth (Fig. 5), bellmouth is opened in end ring aperture (Fig. 4), the corresponding each copper bar end point of end ring The sectional area that the perforated area in face is slightly less than copper bar center makes the bellmouth on copper bar and end ring form interference fit, bellmouth The slotting perforated area appeared in copper bar end is less than the perforated area of the copper bar end inserting surface of bellmouth but is greater than copper bar end Sectional area makes copper bar end deformation retract and can be pierced by the bellmouth of end ring after the bellmouth of insertion end ring, and rotor bar is solid After being scheduled in rotor core each bellmouth on end ring be aligned each copper bar end make copper bar end insertion end ring on it is every A bellmouth, percussion end ring make the stress of the cross recess deformation retract of rotor bar end, the deformation of copper bar end make copper bar and end The surface of ring bellmouth is tightly connected, to improve the bonding strength of copper bar and end ring, that copper bar is pierced by is right again after end ring bellmouth Copper bar is welded with end ring.