Secret reasons causing brush overheating Collector ring and brush machines and friction due to overheating caused by: overheating hinder in large part due originally led to the plant and friction due to overheating, if not yet in the boot plus excitation, it has been found that the collector ring high temperature with the brush, probably in the operation temperature is too high, pulled out after a few brushes the contrary, low temperature, it can be concluded that originally caused due to the machines and friction sake. Very large machines and friction causes fever, mainly the following aspects: 1 brush war face grinding bad run once
rotary union swapped excessive brush. Running exchange brushes, within the same Out Time, each brush shelves only allow exchange 1-2 brushes. Put on the new brush prior grind on a diameter similar to the mold and the collector ring, and the old and new grades shall be equal. If the brush overhaul once swapped many should be put into operation pediment rpm for brush appearance oxide film formed stay affluent enough time. 2 brush and collector ring was too small to fight the fight area is usually not less than 75% of the cross-section of a single brush. 3. Brushes brush box to sway or action jam. Should be able to brush in the brush holder to move freely up and down the gap should meet the delineation of the product, when no delineated its gap is 0.10-0.20mm brush shape to Founder, the upper and lower end of the size deviation of not greater than 0.05mm . 4 brush holder collector ring appearance
rotary joints gap is too large. Material more brittle brush when the brush holder and slip ring appearance when the gap is too large, the brush can not run groups war collector ring and collector ring beveled war, likely to cause the brush collapses. Brush holder with the collector ring appearance gap should describing product skill requirements, and when the products no delineated, the gap may mediate to 2-3mm. Mediation gap can be used when a layer of 2-3mm thick rubber pad attached to the current collector ring appearance, the brush holder arrived to rubber mat, and then tighten the set screw, remove the rubber pad.
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