The tower crane slewing mechanism is commonly driven by an electric motor, with power transmitted through a fluid coupling, planetary gear reducer, and active pinion to drive the slewing bearing. As products continue to upgrade, so do tower crane slewing mechanisms. For instance, the RCV slewing technology is now adopted.
1. Tower crane slewing speed cannot be increased:
· External power supply voltage is too low.
· Brake cannot be fully opened.
· Speed control potentiometer is faulty.
· Governor is faulty.
· Check external power supply.
· Check brake circuit.
· Repair or replace.
· Replace.
2. Tower crane cannot be braked:
· Slewing speed has not decreased to a certain level.
· KHS fault.
· Governor fault.
· Constant speed lowering.
· Repair or replace.
· Replace.
3. Abnormal noise during slewing:
· Lack of lubrication.
· Connection bolts are loose.
· Process hole plugs are loose.
· Add lubricant.
· Tighten.
· Repair.
4. Slewing self-stops at the first gear, excessive eddy current braking, adjust to a smaller value.
5. Slewing cannot operate, the slewing frequency converter has no display, no voltage output, replace the slewing frequency converter.
6. Tower crane slewing cannot be braked:
· Brake switch fault.
· Brake circuit fault.
· Repair or replace.
· Tighten terminal blocks and replace wires.
7. Tower crane cannot slew left:
· Turned to the left limit.
· The left linkage to the PLC signal line is open.
· Slew right for one round.
· Repair or replace.
8. Slewing speed at gears 1, 2, and 3 is too slow, excessive eddy current voltage. Adjust the eddy current voltage at gears 1, 2, and 3 to normal values: 12V, 8V, 4V.
9. Large slewing inertia, eddy current brake fault. Repair or replace.
10. Significant impact sound when changing slewing speed: * Connection bolts are loose or damaged. * Tighten or replace.
Additional Notes: Sensors can be used to monitor the operation of the lift in real-time, ensuring operational safety and construction efficiency. It can also monitor parameters such as the lift speed, height, weight, and inclination angle, and issue audible and visual alarms for anomalies, preventing overloads and other dangerous situations. Features such as identity recognition, overload protection, and floor calling can be implemented to prevent unauthorized personnel from operating the lift.