Good Washing Machine Carbon Brushes so can distinguish
Good Washing Machine Carbon Brushes so that can distinguish: Washing Machine Carbon Brushes looking at the wiring solid, spring strong, flexible, Washing Machine Carbon Brushes surface is not rough and bright, weigh the weight than ordinary Washing Machine Carbon Brushes has the weight on the line. Indicating that it is high density, wear resistance, long life. Washing Machine Carbon Brushes was burned with fine yarn wrapped in the commutator above the gently polished, incidentally with the commutator slot with a piece of chip to clean up, and then the commutator also wrapped with gauze gently grinding level. This will be good, but if the quality of the motor itself is a problem, it is only the replacement of the motor, and now the market cut corners of the machine too much. A: slightly increase the pressure of the drum brush brush to ensure that the motor bearing the degree of precision, do not let the motor commutator beating, Washing Machine Carbon Brushes will not fire, do not fire the heat will be very small Washing Machine Carbon Brushes spring will not burn soft, will not produce a vicious circle. As long as your machine manufacturing precision is high enough, with the time will be long enough.
Lead to Washing Machine Carbon Brushes failure factors are many, mainly in the following areas:
Electromagnetic factors: reactive or excitation current adjustment, the Washing Machine Carbon Brushes spark has changed significantly. When the exciter is switched, the carbon brush of the washing machine is in poor contact with the commutator and the contact resistance is too large. The oxide film of the commutator or the slip ring is not uniform and the unevenness of the brush current distribution of the washing machine is caused; or the sudden change of the load, The short-circuit caused by the exchange between the pieces of the voltage distribution anomalies; unit overload and imbalance; Washing Machine Carbon Brushes selection is unreasonable, Washing Machine Carbon Brushes spacing range; Washing Machine Carbon Brushes quality problems and so on.
Mechanical factors: the center of the commutator is not correct, the rotor is not balanced; unit vibration is large; for the film between the insulation protruding or rewinding protruding; Washing Machine Carbon Brushes contact surface grinding is not smooth, or commutator surface rough and poor contact ; The commutator surface is not clean; each change to the pole under the air gap; Washing Machine Carbon Brushes on the spring pressure is not uniform or size is not appropriate; Washing Machine Carbon Brushes in the brush grip too loose and beating, or too tight Washing Machine Carbon Brushes in the brush grip and so on. Unit operating speed is reduced or vibration is improved and sparks will be reduced.
Chemical factors: the unit running in a corrosive gas, or the unit operating space lack of oxygen, commutator and Washing Machine Carbon Brushes on the surface of a layer of natural formation of copper oxide film was destroyed, the already formed, approximately linear The commutation of the resistor no longer exists, and the commutator sparks are exacerbated during the re-formation of the oxide film on the contact surface. The commutator (or slip ring) is corroded by acid gas or grease.
New Washing Machine Carbon Brushes in the installation of the use of attention to the details: the new Washing Machine Carbon Brushes before use, should be grinding radian, grinding radian generally on the motor. Place a thin glass sandpaper between the carbon brush and the commutator of the washing machine. Under normal spring pressure, grind the brush in the direction of rotation of the motor. The sandpaper should try to close the commutator until the carbon brush surface of the washing machine matches, then Remove the sandpaper, blow the dust with compressed air, and then wipe clean with a soft cloth.
Grinding Washing Machine Carbon Brushes should not use emery paper, to prevent the diamond particles embedded in the commutator slot, the motor running, scrape the brush and commutator surface. After grinding, the motor first 20% -30% of the load running for several hours, so that the Washing Machine Carbon Brushes and commutator running, and the establishment of uniform oxidation film. And then gradually increase the current to the rated load.