Matching Essentials of Electric Drum and Reducer

The electric drum is a new type of driving device, which puts the motor and the reducer in the drum body.It is mainly used in fixed and mobile belt conveyors, instead of traditional motors, with an independent drive device outside the drive pulley of the reducer.

The electric drum has the advantages of high transmission efficiency, low noise, long service life and stable operation, which are inseparable from its electrical connection.

1. The electric drum should provide a wiring diagram.

2. The electric drum must be equipped with a motor protection switch or relay.

3. If the drum motor overheats, the thermal protector will be disconnected.To provide the best thermal protection to the motor, it should be connected to a relay or contactor.The protection device should be adjusted according to the specific parameters of the current motor and checked frequently.

4. The electric drum can be connected to the frequency converter.When connecting the frequency converter, the frequency resonance of the conductor should be avoided to cause the motor to generate voltage oscillation.If the wire is too long, it may cause frequency resonance between the inverter, the wire and the motor.There are two ways to eliminate possible frequency resonances: limit the length of the wires (many inverter manufacturers recommend no more than 10 meters); and

5. The wiring of the electric drum must be completed by a professional electrician.Follow electrical standards and connect the drum motor to the correct mains supply according to the connection instructions.

6. Before starting the drum motor, please make sure that the drum motor is wired correctly, the power supply is connected correctly, and the drum motor and belt can rotate freely.

7. When the electric drum works for more than 8 hours a day, the power should be increased by one gear;

8. When the electric drum starts frequently, the electric power should be increased by one gear;

9. The power of the electric drum covered with glue should be increased by one gear.

It is very versatile and suitable for various occasions, including muddy and wet places.Depending on the usage environment, as a consumer, when purchasing a product, its power must be considered first.In the working process of the electric drum, we make the right choice for its power.

Normally, the electric drum should be repaired once a year.The content is as follows: Drain the lubricating oil in the drum through the oil drain hole on the left end cover of the drum, disassemble the drum, and clean the internal parts and inner wall of the drum.Inject enough calcium sodium grease into each bearing to replace each seal and oil seal on the motor and cylinder block.The replacement sealing ring and oil seal must be intact, smooth, without small bumps and depressions, and without wrinkles.Oil-resistant rubber must be used to check the material of the bearings, stops and gears for wear.If not, replace them and inject new ones into the cylinder.Hu-30 turbine oil or 150 synthetic hydraulic industrial gear oil made in China, and make the liquid level reach 1/3 of the diameter of the drum, check whether the rotor of the drum motor is flexible, whether there should be a collision sound motor inside, clean and free of debris.

The iron core and motor journal should be free from scars and rust.The insulation layer of the winding should be intact, and the binding wire should not be loose.The stator wedges should be free from breakage, protruding and loose, and the wedges at the end should be firmly pulled tight.The motor windings should be connected correctly, the lead-out lugs of well-welded motors should be well-welded or supported, the numbers should be complete, and the electrical clearance of exposed live parts should meet the requirements of product standards.There is no crack on the terminal, and the mechanical strength and toughness meet the requirements.The insulation resistance between the motor winding and the shell and between the phases should meet the requirements, otherwise, it should be dipped in paint and baked.

When the three-phase power supply is balanced, the deviation (absolute value) between any phase current of the three-phase no-load current of the motor and the three-phase average value is less than 10% of the average value.When the motor is running without load, the current is less than 40% of the rated current, and the vibration value of the motor is in line with the national standard.When the maximum temperature of the ambient air is 40 degrees, the temperature rise limit of each insulation level (measured by the resistance method) at this stage, the insulation level of the electric drum motor used has been upgraded to F level.