Unusual noise occurs when the electric hoist of single beam crane is running

 Many failures of the electric hoist used in single-beam cranes, such as the failures of control appliances, motors or reducers, are often accompanied by abnormal noise. The location, level and tone of these noises vary with the cause of the failure. During maintenance, it is necessary to Listen more and read more, you can use or according to the characteristics of the fault sound to determine the location of the sound, find and repair the fault Crane for sale .

The sound of the electric hoist of a single beam crane is generally due to a fault

(1) Abnormal noise occurs on the control circuit, making a “hum” noise. Generally, the contactor has a fault (such as poor contact of the AC contactor, inconsistent voltage level, stuck magnetic core, etc.). Deal with faulty contact The device is overhauled, and must be replaced if it cannot be overhauled. After treatment, the noise will be eliminated by itself.

(2) If the motor emits abnormal noise, it should be shut down immediately to check whether the motor is single-phase running, or whether the bearing is damaged, the shaft of the coupling is not correct, and the “sweeping” faults will cause the motor to make abnormal noises and different fault positions. And the difference between the high and low and the sound, when the single-phase operation, the entire motor emits a regular “buzzing” sound; when the bearing is damaged, it will emit a “buzzing” accompanied by a “cock-cock” sound near the bearing. When the shaft of the coupling is not correct, or the motor is slightly sweeping the bore, the entire motor emits a very high “buzzing” sound, accompanied by a sharp and piercing sound from time to time. In short, according to the difference in noise, the fault should be found, and the maintenance should be carried out one by one to restore the normal performance of the motor. When the motor fault has not been dealt with, the use of the hoist is prohibited.

(3) Abnormal noise is emitted from the reducer, and the reducer has malfunctions (such as the reduction box or bearing lack of lubricating oil, gear wear or damage, bearing damage, etc.). At this time, the machine should be shut down for inspection. First determine the reducer gearbox or bearing Whether the lubricating oil is added before use and whether the lubricating oil is changed regularly during use. If it is not lubricated as required, the reducer will not only produce excessive “buzzing” sound, but also excessive wear or damage to gears and bearings. Some people think that the reducer can still run without adding lubricating oil temporarily or without any serious failure. This idea is wrong. When our company installed an electric hoist, the workers forgot to fill the reducer box with lubricating oil. After just one day of trial use, the reducer made a very high noise. When the reducer was opened, it was found that the gear was scrapped due to excessive wear. The bearing of the reducer is damaged, similar to the failure of the motor bearing, it will also make abnormal noises near the bearing. In order to prevent the expansion of the fault, regardless of the excessive wear or damage of the reducer gear, or the damage of the reducer bearing, it needs to be disassembled and repaired or replaced immediately to eliminate the fault and reduce the noise.

When the electric hoist of a single-beam crane has abnormal noises, the staff should stop the machine for inspection in time to avoid serious consequences.

Unusual noise occurs when the electric hoist of single beam crane is running