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Winding motor carbon brush and slip ring repair and maintenance
09-19-2015 13:20:51 Click：2678
Winding motor carbon brush and slip ring repair and maintenance of the main points are as follows:
1, the installation of brush: brush into the brush holder to ensure to next move freely. Brush side surface and brush grip wall gap should be between 0.1 and 0.3 mm "in order to avoid the electrical brush in the brush to hold because of the gap is too large to produce swing. Brush holder, the lower edge of the set electric ring (ring) shows that the distance shall ensure that in the range of 2-3 mm. The distance is too small - brush to hold contact injury commutation brush away from; too high - easy to brush jiggling and cause damage.
Grinding brush cambered application sandpaper - glass (do not use emery paper) "will be the shrouded for collector and collector ring" on the brush applied from running when the spring pressure. Along the direction of rotation of the motor tics sandpaper (pulling sandpaper should brush filed) - until the brush surface curvature and electric ring (ring) basic agreement so far - clear grinding down the powder and sand - motor idling 30 minutes. Then to 25% of the load operation "to be brush and set electric ring (ring) contact intact - motor can be input the normal operation.
The pressure of 2, brush: application to brush spring pressure should as far as possible uniform ", especially the parallel use of brush - or will lead to uneven load of the brush. The different motor spring pressure is not the same. "High speed motor circumferential the brush pressure should also wear appropriate increase. But the pressure will increase the brush. The brush pressure can be adjusted according to the data in the brush technology performance table.
3, the replacement of the new brush: brush off the original height of 2/3 or 1/2 on the need to replace the new brush. When the replacement of the new brush. The old brush should be all from the motor take "to replace the new brush and brush the same specifications,. The collector ring with one motor brush. Do not allow (ring) mixed with two or more than two kinds of models.
4, brush maintenance: when the motor is running - set electric ring (ring) that keep to a layer of bright brown oxide films "and in stable brush contact voltage low coefficient of friction. Reduced brush wear and tear on the collector ring (ring).
The film is too thick. The contact voltage will increase. Due to overheating and increased loss of electrical brush. The film is too thin. It will aggravate the brushcollector ring (ring) wear and easy to produce strong spark.
The oxide film formation "in 25% of the motor rated load - more easily - oxide film is formed on the thickness and motor using environment. In high temperature, high humidity and corrosive gas - set electric ring (ring) to form the oxide film is thicker. Vice - in plateau region and rarefied air. Under the collector ring (ring) is not easy to form oxide film. Brush "used in a special environment should choose appropriate brush dipping agent treated.
Continuous work - load motor brush should not exceed the allowable value of technical performance in the table. All kinds of brush has therefore prohibited in the collector ring. Self lubrication performance (slip ring oiled and paraffin lubricant etc.).
5, turning and clean electric ring (ring): when the motor electric ring (ring) the ellipse degree more than 0.02 mm "should be turning, grinding, so as not to brush due to set the eccentricity of the electrical ring (ring) through the large and chatter.
6, part of the motor start frequent - copper conductive ring on the use of short life - frequently replaced. If the steel ring. The service life will be improved.
7, in order to avoid set electric ring shooting "requirements of HV motor each shutdown after of the collector ring parts were to ash cleaning - check brush status (whether in the brush box lock - whether askew, whether all the clinging surface collector ring - pressure is too high or too low). When need to replace the carbon brush wear after only 25-30mm; when the slip ring surface wear grooves to replace.
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