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2), carts, trolleys: 1 check and tighten the drive shaft seat, gear box, coupling and shaft, keys are loose; 2 check and adjust the brake wheel gap to make it uniform, sensitive and reliable.
3) Check whether the overhead speed reducer of the bridge crane mainly depends on whether it leaks oil. When there is abnormal noise in the cabinet during operation, the lid inspection must be opened. Generally caused by bearing damage or gear backlash is too large, severe tooth surface wear and other reasons.
4) Lifting and hoisting: 1 Check whether the wire rope, hook, and pulley are safe and reliable. If the wear exceeds the specified value, replace it. 2 Check and adjust the brake to make it safe, sensitive and reliable.
5) Inspection of bridge crane wire rope. Check the wire rope should focus on observation broken wire, wear, kink, rust and other conditions, for some of the wear and broken wire is more serious but has not exceeded the position, to mark, in order to focus on tracking re-examination. Pay attention to check whether the safety limiter of the wire rope in the reel is valid, whether the wire rope pressure plate on the reel is pressed and whether the number of the pressure plate is proper.
6) Lubrication: Check the oil and oil in all parts and add or replace the lubricant as required.
7) Inspection of bridge crane pulleys. The focus is on whether the amount of wear at the bottom of the groove is exceeded and whether the cast iron pulley has cracks. For the balance wheel of the pulley of the overthrowing mechanism, it does not move due to normal conditions and it is easily overlooked. Therefore, before installation, be sure to check the flexibility of the rotation. Otherwise, the length and tension of the left and right wire ropes in the installation cannot be adjusted automatically by the balance wheel, which increases the difficulty of adjusting the pitch rope at high altitude and the danger degree of the operation.
8) Electrical: 1 Check whether each limit switch is sensitive and reliable; 3 Check whether each electrical appliance in the electrical box is sensitive and reliable; 3 Check whether the motor, bell and wire are safe and reliable; 4 Check whether the signal light is good.
9) Check whether the couplings of the bridge crane are loose or even "roll keys". Check the elastic rubber ring of the elastic pin coupling for abnormal wear. Pay special attention to the gear ring wear of the toothed coupling. Due to the poor installation accuracy, with a large amount of misalignment between the two shafts, the entire ring gear will quickly wear out in a short period of time. If there is such a situation in the lifting mechanism, it is prone to serious accidents.
Bridge crane maintenance
1). The appearance of the bridge crane: sweep the exterior thoroughly so that there will be no dust and no yellow robes. Check for cracks and open welds.