Method for repairing breaking cage-shaped rotor cage bars

A repair method and rotor cage technology, which is applied in the manufacture of squirrel cage rotors, stator/rotor bodies, etc., can solve problems such as economic losses, scratches on stator windings, and inability to ensure long-term operation of motors, so as to delay failures and avoid secondary problems. The effect of secondary damage

Inactive Publication Date: 2016-01-06
马鞍山马钢电气修造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the fracture or open welding of the cage bar of the high-voltage AC induction squirrel-cage rotor motor is a relatively common phenomenon in the fault of the motor rotor. For such faults, the existing treatment methods are to make grooves at the fracture. , use silver alloy electrodes or phosphor copper electrodes to weld with oxygen-acetylene method. Although this treatment method is simple and quick, it cannot guarantee the long-term operation of the motor. The cage bar is thrown away, scratching the stator winding and causing "blasting", causing huge economic losses

Method used

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  • Method for repairing breaking cage-shaped rotor cage bars

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Experimental program
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Effect test

Embodiment 1

[0019] An embodiment of the present invention provides a cage-shaped rotor cage bar fracture repair method, which includes the following steps:

[0020] Clean up the welding place before welding: first remove the old welding bump and scale, then remove the grooves on both sides of the broken cage bar facade, and then remove the metal powder and other impurities in the welding place;

[0021] Welding: When the temperature of the weld seam is heated to 380°C, apply flux to the weld seam, continue to heat until the weld seam temperature reaches 780°C, touch the silver solder to the weld seam, wet and fill the weld seam, forming Brazing seam, so that the brazing material and the end ring diffuse each other and are firmly combined;

[0022] Filling expansion material: such as figure 1 As shown, according to the distance between the end cage bar and the tooth pressure plate, cut the expansion conformable material whose size matches the distance, and then brush the expansion conform...

Embodiment 2

[0028] An embodiment of the present invention provides a cage-shaped rotor cage bar fracture repair method, which includes the following steps:

[0029] Clean up the welding place before welding: first remove the old welding bump and scale, then remove the grooves on both sides of the broken cage bar facade, and then remove the metal powder and other impurities in the welding place;

[0030] Welding: When the temperature of the weld seam is heated to 400°C, apply flux to the weld seam, continue to heat until the weld seam temperature reaches 800°C, touch the silver solder to the weld seam, wet and fill the weld seam, forming Brazing seam, so that the brazing material and the end ring diffuse each other and are firmly combined;

[0031] Filling with expansion material: According to the distance between the end cage bar and the tooth pressure plate, cut the expansion conformable material whose size matches the distance, and then brush the expansion conformable material with insu...

Embodiment 3

[0037] A cage-shaped rotor cage bar fracture repair method, it comprises the following steps:

[0038] Clean up the welding place before welding: first remove the old welding bump and scale, then remove the grooves on both sides of the broken cage bar facade, and then remove the metal powder and other impurities in the welding place;

[0039] Welding: When the temperature of the weld seam is heated to 420°C, apply flux to the weld seam, and continue heating until the weld seam temperature reaches 820°C, then touch the silver solder to the weld seam, wet and fill the weld seam, forming Brazing seam, so that the brazing material and the end ring diffuse each other and are firmly combined;

[0040] Filling with expansion material: According to the distance between the end cage bar and the tooth pressure plate, cut the expansion conformable material whose size matches the distance, and then brush the expansion conformable material with insulating paint;

[0041] Binding non-weft ...

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Abstract

The invention provides a method for repairing breaking cage-shaped rotor cage bars. The method comprises the following steps that a welded position is cleared before welding; welding is carried out; filling of expansion materials is carried out; non-woven strips are tied at the ends; and the materials are hoisted in a drying chamber to be cured. According to the method for repairing the breaking cage-shaped rotor cage bars, the repairing problem of the breaking high-voltage alternating-current induction squirrel-cage type rotor motor cage bars with large capacity, impact loads and large rotating inertia is solved, and meanwhile the gaps between the cage bars at the ends are padded with the conformal expansion materials, the non-woven strips are tied at the ends, so that faults are delayed, and the problem that a stator winding is damaged secondarily after a fault occurs is solved.

Description

technical field [0001] The invention relates to a repairing and improving method for broken cage bars of a high-capacity high-voltage AC induction squirrel-cage rotor motor. Background technique [0002] At present, the fracture or open welding of the cage bar of the high-voltage AC induction squirrel-cage rotor motor is a relatively common phenomenon in the fault of the motor rotor. For such faults, the existing treatment methods are to make grooves at the fracture. , use silver alloy electrodes or phosphor copper electrodes to weld with oxygen-acetylene method. Although this treatment method is simple and quick, it cannot guarantee the long-term operation of the motor. The cage bar is thrown away, scratching the stator winding and causing "blasting", causing huge economic losses. Contents of the invention [0003] The invention provides a cage-shaped rotor cage bar fracture repair method, which comprises the following steps: [0004] Clean up the welding place before w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/04H02K15/02
CPCB23P6/04H02K15/0012
Inventor 陈黎明付吉祥
Owner 马鞍山马钢电气修造有限公司
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