The parts inspection and maintenance of stage electric hoists shall follow the principle of comprehensive screening, focused monitoring and regular review, with clear inspection cycles and core maintenance priorities. A full and detailed inspection of the hoist's core components must be conducted before and after each performance, covering the following key aspects:
Inspection of the hoist chain: Focus on checking for signs of wear, corrosion, deformation, jamming or loose links. Pull the chain by hand to feel if it runs smoothly, and inspect its lubrication status to ensure there is no dry friction.
Verification of the hook and anti-disengagement device: Confirm that the hook is free of cracks or deformation and that its opening width complies with standard specifications. Ensure the anti-disengagement latch is responsive and effective, capable of securely locking the hook to prevent heavy loads from falling during lifting operations.
Testing of the drive motor: After starting the motor, listen for smooth operation with no abnormal noises or vibrations. Monitor the motor's heat dissipation to prevent burnout caused by overheating.
Examination of the braking system: Conduct no-load and load-bearing tests to verify that braking performance meets standards. Ensure the brake is responsive and reliable, capable of locking the equipment instantly upon shutdown with no sliding.
Check of the electrical control system: Inspect power cables and control wires for secure connections, aging, damage or exposed conductors, and verify that proper insulation protection is applied at all wire joints. Test the signal transmission stability of control buttons and the remote control system to ensure accurate delivery of operational commands.