the reason: the bearing temperature is higher, the bearing has a different sound.
processing method: check the lubrication condition, whether to need to go, and the oil is in line with the requirements; Check whether the bearing wear, have impurities, should clean or replace the bearing.
2, electrical smoking
: the excitation current overload, the main pole coil smoke, armature current is too large overload, the armature smoke, armature smoking or main pole coil turn-to-turn short circuit, the voltage of the motor is too low, frequent starting, between the armature and stator with brush.
processing methods: reduce the excitation current, reduce workload, stop check by professional personnel, improve the terminal voltage, extended interval starting, check the rotor air gap.
3, brush spark much
reason: brush and commutator poor contact, loose brush or malposition, commutator surface is not smooth, excessive brush wear, brush position is not in the center line, motor foot loosening caused by vibration, armature coils and commutator welding, dc brushless motor, dongguan commutating pole coil break phenomenon, brush type, size does not conform to the requirements, large motor vibration.
processing methods: grinding brush contact surface and light load running in 30 min, make the brush surface is above 75%, tighten and correct the brush position, cleaning or abrasive commutator surface, according to the size of the original brand brush and replace the new brush, brush rod seat to the old mark position adjustment, tighten the bottom bolt, repair welding, find out the breaking point for repair, replacement conforms to the requirements of the brush, and the armature into the dynamic balance test.
4, electrical heating
reason: motor excitation current is too large overload, fan filter clogging, pollution or fan reversal, cooler fan reversal, the internal cooling water filter clogging, broken water or low water pressure, temperature controller, differential pressure switch setting is too high, the motor load is too big.
processing methods: dispatch field current to the rated current, clean the filter, is fan, is fan, clean up the internal filters, check the amount of water in cooling water/water, check the temperature controller and the differential pressure switch Settings, reduce the load.
5, large motor vibration
: the bottom bolt looseness of the motor, the motor is loose, the basis of the installation of the motor base and produce resonance between mechanical, electric control system is not set, the formation of a certain period of current waveform discontinuous make motor has a strong sense of vibration, motor armature balance weight loss, the unit connection not coaxial
processing method: end of fastening bolt and proofreading now, even the axis is the foundation to adopt effective reinforcement measures, add cushion block, strengthening basic bearing point, change the natural frequency, adjusted the control system, keep the motor current waveform continuity within the scope of work, the armature to understand balance test, at the unit.
6, the motor can't start the
reason: one excitation source or not connected to the main circuit power lock, protection system is not set or have locking, did not start the cooling system, control system fault, the input electrical cable circuit, the load is too big.
processing method: check the excitation power supply, switching power supply, the adjustment of right protection system Settings, operating procedures according to regulations operation, start the cooling system, start excitation magnetic to start motor, controlled by the professionals to repair system, check the wiring of the motor, reducing the load.
