A Repairing Method for Excessive Unbalance of Motor Rotor

A technology of motor rotor and balance quantity, which is applied in static/dynamic balance test, machine/structural component test, measuring device, etc. It can solve problems such as deformation and shaft cannot be used twice, and achieve simple repair operation and reduce labor Low cost and high repair accuracy

Active Publication Date: 2017-11-07
NANTONG TONGDA SILICON STEEL STAMPING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a risk in withdrawing the shaft. If the operation of withdrawing the shaft is not in place, it may prevent the shaft from being used again. Generally, the stampings after backwashing can only be recast once, and the rotor stampings that are cast aluminum more than twice will be deformed.

Method used

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Examples

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Effect test

Embodiment Construction

[0017] The present invention will be further described in detail with respect to specific preferred embodiments.

[0018] A method for repairing excessive unbalance of a motor rotor, comprising the following steps:

[0019] The first step is to determine the unbalanced position: place the motor rotor to be repaired on the dynamic balancing machine, rotate the motor rotor, and perform a dynamic balance test to determine the unbalanced position and mark the unbalanced position. During the dynamic balance test, the dynamic balance machine of the prior art can be directly used for the test.

[0020] The second step is to detect the unbalance exceeding the standard amount: hang at the unbalanced position marked in the first step and gradually increase the weight of the weight plate. Every time the weight of the weight plate is increased, the motor rotor will be subjected to at least one dynamic balance test. Until the dynamic balance test result of the motor rotor meets the set va...

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PUM

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Abstract

The invention discloses a method of repairing the exceeded amount of unbalance of a motor rotor. The method includes the steps: determining an unbalance position; detecting the exceeded amount of unbalance, that is to say, hanging a weight stack in the unbalance position and gradually increasing the weight of the weight stack, and at least carrying out one dynamic balancing test for a motor rotor each time when the weight of the weight stack is increased till a dynamic balancing test result of the motor rotor accords with a set value, then the total weight of the weight stack hanging in the unbalance position being the exceeded amount of unbalance of the motor rotor; pressing and solidifying by an air gun; performing repair welding, i.e., weighing a welding rod that equals the exceeded amount of unbalance in weight, and carrying out repair welding through a filling argon arc welding method; and polishing and scraping. Through the above method, a rotor that has been sleeved with a shaft is simple to repair and operate, risks of secondary shaft sleeving and the processing time can be minimized, the labor cost is reduced, and the repairing precision is high.

Description

technical field [0001] The invention relates to a treatment method when the motor rotor is unbalanced, in particular to a repair method for the unbalanced amount of the motor rotor exceeding the standard. Background technique [0002] With the development of industrial society, domestic and foreign medium and small asynchronous induction motor manufacturers have higher and higher requirements on the quality of the matching cast aluminum rotors. Ideally, the pressure on the bearing should be the same when the cast aluminum rotor of the motor rotates and when it does not rotate, such a cast aluminum rotor is balanced. However, in actual production, due to the quality of the molten aluminum or the rough defects of the rotor, errors in processing and assembly, when the rotor rotates, the centrifugal inertial force generated by each tiny particle on it cannot cancel each other out, and the centrifugal inertial force passes through The bearing acts on the motor and its foundation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M1/38
Inventor 张迎春蒋春萍彭丽
Owner NANTONG TONGDA SILICON STEEL STAMPING TECH CO LTD
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