The sound of the group crane electric hoist must be in the operating dynamics. Although many manufacturers now choose to eliminate noise or no noise, the sounds that are emitted during certain dynamics still exist. Although they cannot reach the pollution regulations, they are also not allowed. Avoided. Under normal use conditions, the group hoist electric hoist only emits the sound of operation. However, when the group hoist electric hoist fails, it will produce noisy noise. The orientation of these noises and the unevenness and sound quality will vary according to the cause of the defect. If the motor has abnormal noise, it is assumed that the group hoist electric hoist is single-phase operation, and the whole motor will have a "buzzing" sound of strong and sudden rules. Assuming that it is a bearing problem, it will be heard near the bearing. "Buzzing" sound; and if the coupling shaft is not correct or the motor is slender, the entire motor will emit a very high "buzzing" sound, from time to time accompanied by a sharp and harsh sound, you can according to the defects The characteristics of the sound, determine the location of the sound, find and repair defects. Everyone knows the dynamics of the group hoist electric hoist, you can accurately determine its health status, and distinguish whether the group hoist electric hoist has normal use problems.