Grinding machine maintenance common fault sample analysis

Grinding machine maintenance common fault example analysis - 2020 04 - 14 abstract: in this paper, based on the actual maintenance experience to the actual grinding machine machine code, failure phenomenon, failure reason and solution to intuitively describe grinding machine failure analysis. Key words: polishing machine; Fault; Reasons for car polishing machine, rated voltage 575 v, rated current, 28. 8 A, 30 horsepower, specifications P25G6774B. 。 Here are nine of the motor fault, fault illustrations attached instructions. Number: 1 motor B9049431060 L 035 AN fault phenomenon: breakdown between stator slot, bearing the above paint has gone completely. The cause of the problem: bearing wear, friction between stator and rotor at high temperature. Solution: replace the bearing, replace the coil. The stator insulation resistance: insulation cover to ground zero. Slot number: the picture of the breakdown between the two motor B9049431060 L 036 fault phenomenon: the AN to ground, coil winding coil turn-to-turn short circuit, bearing rotating kaka's. The cause of the problem: the coil insulation aging. Solution: replace the coil, replace the bearing. The stator insulation resistance: insulation cover to ground zero. 3 motor number: B9049431060 L 028 fault phenomenon: the AN rabbet breakdown, dusty. The cause of the problem: the rotor and stator gap is too big, after the friction caused by bearing fault, the resulting chamber. Solution: replace the bearing, the heavy coil. The stator insulation resistance: insulation cover to ground zero. 4 motor number: B9044746020 L 020 fault phenomenon: rabbet breakdown, bearing bending. The cause of the problem: bearing lubrication is not reasonable, too little oil, bearing damage. Solution: replace the bearing, the heavy coil. The stator insulation resistance: insulation cover to ground zero. 5 motor number: B9049431060 L 018 AN fault phenomenon: breakdown between rabbet, groove. The cause of the problem: bearing jammed. Solution: replace the bearing, the heavy coil. The stator insulation resistance: insulation cover to ground zero. 6 motor number: B9049431060 L 020 fault phenomenon: the AN alternate with breakdown, bearing damage. The cause of the problem: coil insulation aging, high temperature insulation is low, the breakdown. Solution: replace the bearing, replace the coil. The stator insulation resistance: insulation cover to ground zero. Number: 7 motor B9014055070 L 002 fault phenomenon: insulation cover ground for 60 ohms. The cause of the problem: when varnished didn't do well. The solution: coil varnished again, heating, drying, increase its insulation resistance. Cold dc resistance of a thick, every between two phase measurement is 0. 8 o. Number: 8 motor B9049431050 L 002 AN fault phenomenon: motor does not work. The cause of the problem: prepare teardown again find reason; Uneven surface paint. Solution: going to bearing turntable and coil. The stator insulation resistance: insulation cover to 750 ohms. Coarse cold dc resistance for: U and V 0. 9 o; U, W 0。 Eight o; V, W0。 8 o. Motor number: 9 B9049431060 L 005 AN fault phenomenon: motor does not work. The cause of the problem: prepare teardown again find reason; Three-phase lead spacing between the casing and insulation glue is not good; Motor label brand wear. Solution: going to bearing turntable and coil. The stator insulation resistance: insulation cover to 750 ohms. Cold dc resistance of a thick, every between two phase measurement is 0. 8 o. （ Henan runhua general equipment co. , LTD. )