Summary:...
1. Welding machine drying method
a. Before the drying method of the AC welding machine is operated, connect the terminals of the damped gear motor windings in series, and the casing is grounded, so that the three sets of windings can be heated and dried. In order to monitor the current change during the drying process, a Only the ammeter is used to observe whether the current reaches the rated current of the geared motor. Drying the
DC gear motor with an AC welding machine does not require disassembly and inspection, which reduces the workload. At the same time, the geared motor uses its own resistance to heat up when the power is on, so that the coil is heated evenly, and the drying effect is better.
b. The operation wiring of the drying method of the DC welding machine is similar to that of the AC, and the ammeter connected in series should be a DC ammeter. Drying the damped geared motor with a DC welding machine is easy to operate, and can also dry large and medium-sized geared motors and high-voltage geared motors for a long time. In this way, when the electric welding machine works for a long time or with a high current, its internal components will not be damaged due to long time high current operation, so it can be used for a long time for large and medium-sized geared motors. It is worth noting that when drying with these two methods, it is required that all joints must be in good contact and tightened, and the lead wire of the electric welding machine should use special wires, and the cross-sectional size should meet the current carrying capacity of the output current of the electric welding machine. Pay attention to the cooling of the welding machine's own transformer, and at the same time ensure that the insulation resistance of the geared motor cannot be lower than 0.1MΩ. Also pay close attention to the winding temperature of the geared motor and adjust the voltage and current in time.
2. External heat source heating method
For the damped DC gear motor, disassemble and inspect it first, put a high-power incandescent light bulb into the gear motor to bake it, or put the gear motor into the drying room for drying. This method is easy to operate, safe and reliable, but it is only suitable for small geared motors that are easy to disassemble and inspect. For large and medium-sized geared motors or geared motors that are not easy to disassemble and inspect, the workload is relatively large, and the feasibility is also reduced. It should be noted that the light bulb or heat source should not be too close to the coil when operating this method to prevent the coil from being burned out, and items such as canvas can be added to the geared motor housing to keep warm.
3. Excitation coil drying method
The excitation coil drying method is to wind the excitation coil on the iron core of the stator coil of the deceleration motor, and pass the alternating current to make the stator generate magnetic flux, and rely on its iron loss to dry the stator of the deceleration motor.
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