What are the transformation measures for electric hoist cranes in coal injection workshops?

Machine modification:

(1) For the phenomenon of top punching, the electric hoist can be dismantled and overhauled, and the damaged parts can be replaced and then tested.
(2) For the shaking phenomenon, the trolley clearance needs to be reinstalled and adjusted to 4~5mm on each side, and the I-beam needs to be repaired (adjusted and repaired by the installation unit).
(3) For the gnawing phenomenon, the trolley needs to be reinstalled and adjusted (adjusted by the installation unit), and the I-beam needs to be repaired (repaired by the crane manufacturing unit).
(4) For the three legs of the hoist trolley, the trolley hole needs to be repaired, the I-beam needs to be repaired, and the trolley wheels need to be replaced (repaired by the crane manufacturing unit).
Speed ​​change:(1) For the noise exceeding the allowable value, lubricating oil should be added according to the instructions. After inspection, the gears should be repaired or the gears and gear shafts should be replaced. (2) Oil leaks from the hollow shaft and seeps into the drum shell. Drain the excess oil or replace the oil seal in the hollow shaft. Replace with the grade oil specified in the manual. (3) The box cover joint leaks oil, replace the oil seal strip, and tighten the box cover connecting bolts. (4) The connection between the reducer and the drum housing is broken. The housing or damaged gears need to be removed and replaced.
(5) The fan plate of the reducer housing is broken. The housing or broken gears need to be removed and replaced.
(6) The bearing of the 08 shaft of the reducer housing is broken (commonly known as the bull nose), and the housing or broken gears need to be removed and replaced.
(7) The transmission gears of the reducer are all worn. After installation, they need to be oiled according to the requirements of the manual before use. After the failure occurs, all gears and bearings of the reducer need to be replaced.

Lifting main motor modification:
(1) The lifting motor is weak or the motor does not run. Ensure that the motor terminal voltage should not be less than 90% of the rated voltage. The power cable needs to be selected according to the manual. Adjust the power consumption to ensure that the three-phase voltage difference is less than ±3%; check whether the fuse, contactor and each terminal are connected normally. Remove the brake wheel, clean the rust on the rear end cover, then install and debug it and return it to the factory for repair, and re-dip paint and dry it.
(2) The brake slides down. Adjust the brake clearance to 2~4mm, replace the brake ring (wheel), and regularly oil the bearing to ensure that the shaft can move flexibly.
(3) The brake sound is too loud. Adjust the brake clearance to 2~4mm and replace the brake ring.
(4) The power supply trips. If the limit wire or lead wire is broken, it should be bandaged in time, and foreign matter in the stator should be removed; increase the capacity of the circuit breaker (air switch). (5) The brake ring is debonded, broken or loose. Replace the fan brake ring.

Renovation of the drum device, coupling, and intermediate shaft device:
(1) The rope guide is broken. The rope guide is a consumable part. Except for the casting sand hole or the steel belt breakage, other damages should be purchased and replaced.
(2) The limit rod is stuck. Reshape and keep it flexible. Lubricant can be added if necessary.
(3) The drum shell is deformed. Overhaul and reshape.
(4) The wire rope is broken. Wire rope is an important part of the hoist. Depending on the degree of use, the warranty period cannot be limited to 1 year. If the wire rope is fatigued and broken, it should be replaced immediately according to the specified standards.
(5) Abnormal noise at the fixed pulley. After inspection, add an appropriate amount of lubricating oil to the part where the noise is emitted.
(6) The movement and impact sound emitted by the intermediate shaft device. Add an adjustment gasket to reduce the movement.
Modification of electric trolley and running motor: (1) The driving wheel teeth are worn and the driving wheel of the trolley needs to be replaced. (2) The running wheel bearing is worn or broken and the running wheel bearing needs to be replaced. (3) The trolley wall panel is bent and the trolley assembly needs to be replaced. (4) The drive box is broken and the drive assembly needs to be replaced. (5) The drive running noise should be paid attention to flatness during installation, or replace the paper pad. (6) The running motor needs to be replaced or the motor needs to be rewound if it is burned.

Hook device modification: (1) If the hook head is deformed, it is recommended to replace the sling and sling, and replace the deformed hook in time. (2) If the hook is worn out, it is recommended to replace the chain and sling, and replace the worn hook in time. (3) If the hook shell is damaged, the hook shell needs to be replaced. (4) If the hook pulley is damaged, the hook pulley needs to be replaced.