CN201466823U

CN201466823U - End ring device of motor

Info

Publication number: CN201466823U
Application number: CN2009200657037U
Authority: CN
Inventors: 晏才松
Original assignee: CSR Zhuzhou Electric Locomotive Co Ltd; CSR Zhuzhou Electric Co Ltd
Current assignee: CRRC Zhuzhou Locomotive Co Ltd; CRRC Zhuzhou Electric Co Ltd
Priority date: 2009-08-26
Filing date: 2009-08-26
Publication date: 2010-05-12
Anticipated expiration: 2019-08-26

Abstract

The utility model relates to an end ring device of a motor, which comprises a rotor iron core of the motor, a rotor pressing ring, a rotor conducting bar, a rotor dynamic balance disk and an end ring of the motor, wherein the rotor conducting bar of the motor is installed in a groove of the rotor iron core of the motor and is welded with the end ring of the motor together. The end ring of the motor is sleeved on the rotor dynamic balance disk of the motor by a transition fit; a pin bolt which prevents the circumferential direction of the end ring from swinging relative to the rotor iron core is embedded on the matching face of the end ring of the motor and the rotor dynamic balance disk. Meanwhile, in order to prevent the looseness of the pin bolt, the pin bolt and the rotor dynamic balance disk are welded together by spot welding. Furthermore, the rotor dynamic balance disk is fixed on the rotor pressing ring by welding. The utility model can lower the temperature of the rotor end ring and the temperature of the position of a welding seam of the rotor end ring and the conducting bar in the running process of the motor, thereby relieving the problem of high-temperature softening of the rotor end ring, the conducting bar and the welding seam between the rotor end ring and the conducting bar greatly.

Description

A kind of electric machine end ring device

Technical field

The utility model relates to a kind of modular construction of motor, refers in particular to a kind of motor copper bar rotor structure.Be mainly used in various AC induction motor squirrel-cage copper bar rotor structures.

Background technology

Electric machine end ring is the conductive component of squirrel-cage copper bar rotor, is shaped as annular, is used to connect the bus (bar) of rotor, generally is installed in the end of the sliver of motor.End ring generally all is directly to be welded in the motor rotor conducting bar two ends by welding manner, and copper bar rotor sliver short circuit is got up, and forms a cage-shaped structure.The rotor bar broken bar fault is the inertia problem that is perplexing the squirrel-cage copper bar rotor always.The reason of the disconnected bar of squirrel-cage copper bar rotor sliver mainly contains the following aspects: 1) softening resistance can satisfy the requirement of motor operating condition under rotor bar mechanical strength or the rotor bar high temperature.It needs to be noted, because of the normally fatigue fracture of reason of the not enough bar failure that causes of rotor bar mechanical strength; 2) softening resistance can satisfy the requirement of motor operating condition under rotor end ring mechanical strength or the rotor end ring high temperature; 3) weld strength can not satisfy the requirement of motor operating condition between rotor end ring and sliver.Solving aspect the disconnected bar problem of squirrel-cage copper bar rotor sliver, the major measure of taking at present is: improve the strength of materials of rotor bar and end ring, or improve weld strength between rotor bar and the end ring and prevent the rotor bar bar that breaks.But improving rotor bar and end ring high temperature softening resistance energy, and preventing that from still there is deficiency in rotor bar fatigue fracture aspect, therefore necessary further taking measures improved.

The utility model content

Technical problem to be solved in the utility model is the deficiency that prevents the disconnected bar measure of squirrel-cage copper bar rotor sliver at existing, further takes measures to improve squirrel-cage copper bar rotor electric machine end ring and sliver connection reliability.This structure can effectively improve the connection reliability of electric machine end ring and sliver.

In order to solve the problems of the technologies described above, the technology implementation scheme that the utility model proposes is: a kind of motor rotor end ring device, comprise electric machine rotor iron core, rotor pressing ring, rotor bar, rotor dynamic balancing dish and rotor end ring, wherein conductor bars for dynamoelectric machines is installed in the groove of electric machine rotor iron core, and rotor bar and end ring weld together.Its characteristics are: electric machine end ring is enclosed within on the rotor dynamic balancing dish by interference fits, and in order to prevent in the motor operation course, particularly motor is repeatedly in the starting process, rotor end ring causes that rotor bar stretches out the swing repeatedly of rotor core tangent to periphery direction partly and causes the rotor bar fatigue fracture, on electric machine end ring and balancing frame mating surface, stamp the pin that prevents the relative rotor core swing of end ring circumferencial direction, loosening for preventing pin simultaneously, the pin point is welded on the rotor dynamic balancing dish.

After adopting technique scheme, the electric machine end ring structure of made is because electric machine end ring is to be fixed on the balancing frame by interference fits, heat part on the rotor end ring can be transmitted in the rotor core by the rotor dynamic balancing dish, thereby the temperature of rotor end ring in the reduction motor operation course and rotor end ring and sliver commissure, thereby alleviate the hot mastication problem of the weld seam between rotor end ring, sliver and rotor end ring and sliver greatly; There is pin to prevent that rotor end ring from causing that rotor bar tangent to periphery direction swings the rotor bar fatigue fracture that causes repeatedly simultaneously.Therefore from preventing the angle of hot mastication and fatigue fracture, further guaranteed solid and reliable connection the between rotor bar and end ring, prevent that disconnected bar phenomenon from appearring in the squirrel-cage copper bar rotor.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a structural representation end view of the present utility model;

Fig. 3 is an embodiment of the present utility model.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is further specified.

Accompanying drawing 1 has provided a kind of structure embodiment of the present utility model, from accompanying drawing as can be seen, the utility model is a kind of end ring device of rotor, comprise electric machine rotor iron core 4, rotor pressing ring 2, rotor bar 3, rotor dynamic balancing dish 6 and electric machine end ring 1, wherein motor rotor conducting bar 3 is installed in the groove of electric machine rotor iron core 4, and rotor bar 3 welds together with electric machine end ring 1.Its characteristics are: electric machine end ring 1 is enclosed within on the rotor dynamic balancing dish 6 by interference fits; And in order to prevent in the motor operation course, particularly motor is repeatedly in the starting process, the swing of rotor end ring 1 causes that rotor bar 3 stretches out the swing repeatedly of the tangent to periphery direction of rotor core part, and cause the fatigue fracture of rotor bar 3, on electric machine end ring 1 and rotor dynamic balancing dish 6 mating surfaces, be inlaid with the pin 5 that prevents the relative rotor core swing of end ring circumferencial direction.Loosening for preventing pin 5 simultaneously, pin 5 and rotor dynamic balancing dish 6 is spot-welded together.In addition, rotor dynamic balancing dish 6 is fixed by welding on the rotor pressing ring 2.

Claims

1. the end ring structure of a rotor comprises electric machine rotor iron core, rotor pressing ring, rotor bar, rotor dynamic balancing dish and electric machine end ring, and wherein motor rotor conducting bar is installed in the groove of electric machine rotor iron core, and rotor bar and electric machine end ring weld together; It is characterized in that: electric machine end ring is enclosed within on the rotor dynamic balancing dish by interference fits.

2. the end ring mechanism of rotor as claimed in claim 1 is characterized in that: be inlaid with the pin that prevents the relative rotor core swing of end ring circumferencial direction on electric machine end ring and rotor dynamic balancing dish mating surface.

3. the end ring mechanism of rotor as claimed in claim 2, it is characterized in that: pin and rotor dynamic balancing are made an inventory welded together.

4. the end ring mechanism of rotor as claimed in claim 1, it is characterized in that: the rotor dynamic balancing dish is fixed by welding on the rotor pressing ring.