Soldering method of conducting ring of motor rotor

A brazing method and technology for motor rotors, applied in the manufacture of motor generators, circuits, electromechanical devices, etc., can solve the problem of long heating time, affecting the mechanical properties of copper materials, and inability to adapt to the brazing of large-capacity motor rotors with ultra-thick conductive rings and other problems to achieve the effect of improving performance and quality and high brazing quality

Active Publication Date: 2009-10-14
上海电气集团上海电机厂有限公司
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Problems solved by technology

Therefore, the output power of the intermediate frequency welding machine required for brazing in the prior art is far greater than the rated power of the welding machine, and the end ring needs to be welded to the rotor guide bar in more than ten sections, and the brazing heating time is

Method used

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  • Soldering method of conducting ring of motor rotor
  • Soldering method of conducting ring of motor rotor
  • Soldering method of conducting ring of motor rotor

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[0024] The brazing method of the motor rotor conductive ring of the present invention specifically for a large-capacity motor adopts the following steps:

[0025] 1. Such as figure 1 As shown, the outer corners of the two ends of the rotor guide bar 100 of the motor rotor are processed into a chamfer 101 of 14×45°. After the outer corners of the two ends of the guide bar are chamfered, the rotor guide bar reduces the welding area; the outer diameter of the end ring can also be reduced correspondingly, and the quality of the end ring is correspondingly reduced, which reduces the number of segments for segmented welding and shortens The heating time is reduced, the deformation of the rotor squirrel cage can be reduced, and no large internal stress is generated, and the bending of the rotor bar can also be reduced or even avoided.

[0026] Because the surface of the parts to be welded will inevitably be covered with oxides, grease and dust during the processing and storage before we...

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Abstract

The invention relates to a soldering method of a conducting ring of a motor rotor. In the method, an end ring is heated through improving the structure of a conducting bar of a rotor and adopting a medium frequency induction way, and a super thick conducting ring of a high capacity motor rotor is soldered by the way that two brazing torches respectively assist heating the end head of the conducting bar and the excircle surface of the end ring. The soldering method of the conducting ring of the motor rotor has the advantages of good soldering quality and motor performance and quality improvement when being used for soldering the conducting ring of the high capacity motor rotor.

Description

technical field [0001] The invention relates to a large-scale motor, in particular to a method for brazing a conductive ring of a motor rotor of a large-scale motor. Background technique [0002] At present, the four-pole asynchronous motor with the largest stand-alone capacity that can be independently developed and manufactured in China is a 25000KW 4P asynchronous motor. The rated current of this motor is 1588A, the starting current multiple is 5.54 times, and the synchronous speed of the motor reaches 1500r / min. These parameters put forward high technical requirements for an important part of the motor rotor - the brazing of the end ring and the rotor guide bar. There must be reliable electrical contact between the rotor bar and the end ring. The area of ​​the joint is large enough to ensure that the current flowing through the joint will not heat up the joint when the motor is started and running. The quality of brazing directly affects the performance and reliability...

Claims

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Application Information

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IPC IPC(8): H02K15/00H01R43/02B23K1/002
Inventor 王岳元纪玫红
Owner 上海电气集团上海电机厂有限公司
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