Bridge crane inspection and maintenance system - weekly inspection and monthly inspection

     bridge gantry crane  components as more different techniques for the various components of the features, we will be maintained in the actual work, inspection cycle is divided into weeks, months, years, each cycle including the following:
    1 weekly inspection and maintenance
    Maintenance and inspection once a week, inspection and maintenance as follows:
    1) Check the brakes on the nuts, cotter pins, positioning plates are complete, loose, levers and springs without cracks, pin on the brake wheel bolts and washers are loose cushion, complete; brakes are reliable braking. Brake release opening of the brake pads should be less than 1.0mm, and the distance of the gap on both sides of the brake drum should be equal, the pivot pin may have stuck.
    2) Check the safety switch and limit switch is accurate, flexible and reliable work, especially the increase in the limit is reliable.
    3) Check the wire rope on the drum and pulley wound is normal, without off-tank, channeling, knotted, twisted and other phenomena, wire rope clamp bolts are tightened, whether there is double nut locking devices.
    4) Check the hoisting mechanism coupling closures fastening screw is loose, the shortage.
    5) Check the transmission mechanism is normal,overhead bridge crane with or without abnormal noise.
    6) Check all lubrication lubrication condition is good.
    7) Check the track if there is a foreign body obstruction bridge machine is running.
    (2) Monthly inspection and maintenance
    Once monthly maintenance and inspection, inspection and maintenance, we cover every week to the contents include:
    1) Check the brake pad wear pads should not exceed 2mm, wheel and brake pad contact area shall not be less than 70%; checks the status of each mounting pin and wear and lubrication conditions, the amount of wear of the pin should not exceed 5% of the original diameter of the small axis and the amount of wear of the mandrel should not exceed 5% of the original diameter and ovality than 0.5mm.
    2) Check the wire rope for wear, if there is broken wire and so on, check the wire rope lubrication conditions.
    3) Check the hook for cracks, wear and tear of its dangerous section does not exceed 5% of the original thickness; hook nut locking device is complete, set the hook on the various parts are complete and reliable. Hook should rotate flexible, non-jamming phenomenon.
    4) Check that all bolts are loose and shortages.
    5) Check the motor, reducer bolts fastening the base and individually fastened.
    6) Check the gearbox lubrication conditions, the oil level should be within the specified range, measures should be taken against oil leakage sites prevent leakage.
    7) of the gears.
    8) Check the balance at the rope pulleys for wear on pulleys and pulley shaft lubrication.
    9) Check the pulley position, to see whether it flexible, without damage, cracks, particular attention to the wear of the fixed pulley shaft.
    10) Check the brake wheel, uneven surface of its work should not exceed 1.5mm, brake wheel should not have cracks, its radial runout should be less than 0.3mm.
    11) Check the coupling, which should not be on the key and keyway damage, loose; two coupling between the drive shaft axial string momentum should be 2 ~ 7mm.
    12) Check the size of the vehicle operating conditions, should not have gnawing rails, three fulcrum, when the pendulum starts and stops and so on. Check the wheel rim and the tread wear, the wear of the rim thickness should not exceed 50% of the original thickness, wheel tread wear should not exceed 3% of the diameter of the wheel of the original.
    13) Check the cart track conditions,overhead gantry crane to see whether the bolts loose, shortages, pressure plate is fixed on the track, rail cracks and fracture; two tracks whether the gap joints 1 ~ 2mm (summer) or 3 ~ 5mm ( winter), the joint down, left dislocation is more than 1mm.
    14) for the crane to conduct a comprehensive clean, clear on dirt.