CN103078451A - On-line repair method for copper ring of asynchronous motor - Google Patents
On-line repair method for copper ring of asynchronous motor Download PDFInfo
- Publication number
- CN103078451A CN103078451A CN2013100141823A CN201310014182A CN103078451A CN 103078451 A CN103078451 A CN 103078451A CN 2013100141823 A CN2013100141823 A CN 2013100141823A CN 201310014182 A CN201310014182 A CN 201310014182A CN 103078451 A CN103078451 A CN 103078451A
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- asynchronous motor
- grinding tool
- copper ring
- brush
- motor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention relates to an on-line repair method for a copper ring of an asynchronous motor and belongs to the field of motor equipment maintenance. The method comprises the following operation steps: a grinding tool of which the shape is identical to that of an electric brush of the asynchronous motor is manufactured; the thickness of the grinding tool is smaller than that of the electric brush of the asynchronous motor by 0.5mm, and the width of the grinding tool is smaller than that of the electric brush of the asynchronous motor by 0.5mm; the radius of curvature of the friction surface of the grinding tool is the same as that of the copper ring of the asynchronous motor; one electric brush is removed from a burned copper ring of the asynchronous motor, then the manufactured grinding tool is put into a brush rack, the grinding tool is arranged according to a method for arranging the electric brush, a crane is switched on to be powered on, and the asynchronous motor runs without load for at least 3 minutes; and when the copper ring is detected to be bright as a new one, the repair operation is completed, and functions of the asynchronous motor are recovered. According to the repair method disclosed by the invention, the equipment accident that the motor is burned due to arc short circuit blasting is effectively avoided, and a reliable guarantee is brought for safe production, cost reduction and benefic increase.
Description
Technical field
The invention belongs to motor apparatus maintenance field, be specifically related to the online restorative procedure of a kind of asynchronous motor copper ring.The present invention is mainly used in the crane three-phase asynchronous wound rotor type motor, also can use at asynchronous motors such as various Metal Cutting Machine Tools, forging press, conveyer belt, foundry machinery.
Background technology
Characteristics according to hoisting machinery work, must have softer mechanical property and speed regulation capacity preferably, therefore hoisting machinery adopts three-phase asynchronous wound rotor type motor more, in the rotor circuit of wire wound asynchronous motor, seal in RSET and carry out speed governing, the method can be regulated the rotating speed of wound-rotor motor smoothly, and equipment operating is simple, small investment, operation and maintenance is convenient, cost is low.
But three-phase asynchronous wound rotor type motor is in use because frequent starting, braking, reverse and speed governing, cause rotor current larger, particularly reversal connection electric current and overload current are larger, play electric arc when causing this motor rotor copper ring to contact with brush, burn and hinder the rotor copper ring surface.
If can not in time roll off the production line repairing, will cause the short circuit of motor electric arc to blow out the equipment breakdown of motor scaling loss.
The repairing of rolling off the production line just needs to change motor, and human and material resources, financial resources and the time that drops into this moment are all larger, namely reduce the running rate of equipment, affect again the normal operation of relevant device, brings very adverse influence for safety, production, cost, consumption etc.
Summary of the invention
In order to reduce maintenance time, come into operation fast, the invention provides the online restorative procedure of a kind of asynchronous motor copper ring, thereby avoid causing the short circuit of motor electric arc to blow out the equipment breakdown of motor scaling loss.
Technical scheme of the present invention:
Making onesize emery wheel according to the actual size of motor brush hinders the rotor copper ring surface and places under repair burning.
Concrete operating procedure is:
1, at first measures the basic size of asynchronous electric electromechanical brush;
2, make a grinding tool identical with asynchronous electric electromechanical brush shape;
3, the thickness of grinding tool is less than 0.5 millimeter of motor brush thickness, and the width of grinding tool is less than 0.5 millimeter of asynchronous motor brush width; The radius of curvature of grinding tool rubbing surface is identical with the radius of curvature of asynchronous motor copper ring;
4, remove a brush at the asynchronous motor copper ring that is burnt, then the grinding tool of making is put into brush holder, install grinding tool according to the method that brush is installed, crane closes a floodgate and send electricity, and this asynchronous motor is carried out zero load rotated at least 3 minutes,
5, check copper ring light as new, repair is finished, the asynchronous motor functional rehabilitation.
The present invention is through the multiple authentication on crane, and effect is ideal, only needs 10 minutes operation of two people just can finish in practice is used.The present invention is convenient, fast, practical, is the online a kind of best approach of repairing of motor.
The present invention has effectively avoided the short circuit of motor electric arc to blow out, and the equipment breakdown of motor scaling loss has all brought reliable guarantee for safety in production and cost efficiency.
Embodiment
1, at first measures the basic size of asynchronous electric electromechanical brush;
2, select suitable waste and old emery wheel to cut, make a grinding tool identical with asynchronous electric electromechanical brush shape;
3, the thickness of grinding tool is less than 0.5 millimeter of motor brush thickness, and the width of grinding tool is less than 0.5 millimeter of asynchronous motor brush width; The radius of curvature of grinding tool rubbing surface is identical with the radius of curvature of asynchronous motor copper ring;
4, remove a brush at the asynchronous motor copper ring that is burnt, then the grinding tool of making is put into brush holder, install grinding tool according to the method that brush is installed, crane closes a floodgate and send electricity, and this asynchronous motor is carried out zero load rotated at least 3 minutes,
5, check copper ring light as new, repair is finished, the asynchronous motor functional rehabilitation.
The three-phase asynchronous wound rotor type motor rotor is every two brushes mutually, removes one of them brush at the motor copper ring that is burnt, and a brush can satisfy the motor no-load electric current and flow through this moment, motor rotated 3 minutes, check copper ring light as new, service work is finished, and motor function is recovered.
Claims (1)
1. online restorative procedure of asynchronous motor copper ring, concrete operation step is:
(1), measures the basic size of asynchronous electric electromechanical brush;
(2), make a grinding tool identical with asynchronous electric electromechanical brush shape;
(3), the thickness of grinding tool is less than 0.5 millimeter of motor brush thickness, the width of grinding tool is less than 0.5 millimeter of asynchronous motor brush width; The radius of curvature of grinding tool rubbing surface is identical with the radius of curvature of asynchronous motor copper ring;
(4), being removed a brush by the asynchronous motor copper ring that burnt, then the grinding tool of making is put into brush holder, install grinding tool according to the method that brush is installed, crane closes a floodgate and send electricity, and this asynchronous motor is carried out zero load rotation at least 3 minutes;
(5), the inspection copper ring is bright as newly, repair is finished, the asynchronous motor functional rehabilitation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100141823A CN103078451A (en) | 2013-01-15 | 2013-01-15 | On-line repair method for copper ring of asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100141823A CN103078451A (en) | 2013-01-15 | 2013-01-15 | On-line repair method for copper ring of asynchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103078451A true CN103078451A (en) | 2013-05-01 |
Family
ID=48154889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100141823A Pending CN103078451A (en) | 2013-01-15 | 2013-01-15 | On-line repair method for copper ring of asynchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103078451A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03222654A (en) * | 1990-01-25 | 1991-10-01 | Daido Steel Co Ltd | Method of polishing slip ring |
| CN201910565U (en) * | 2011-03-10 | 2011-07-27 | 宁波钢铁有限公司 | Motor slip ring online grinding device |
-
2013
- 2013-01-15 CN CN2013100141823A patent/CN103078451A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03222654A (en) * | 1990-01-25 | 1991-10-01 | Daido Steel Co Ltd | Method of polishing slip ring |
| CN201910565U (en) * | 2011-03-10 | 2011-07-27 | 宁波钢铁有限公司 | Motor slip ring online grinding device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130501 |