Large axial vibration of the motor
Thread Content
After the 2500kw motor was operated for one month, it was found that the axial vibration on the side not connected to the coupling was high, with a vibration amplitude of 0.3 mm. Help analyze the reasons and solutions
Axial movement of the motor occurs due to the gravitational force acting on the rotor, issues with its installation level, or electromagnetic forces resulting from an incorrect magnetic center; these factors cause axial movement of the motor, leading to increased vibration. In severe cases, this can result in wear of the bearing shells
Are you measuring the casing, or the area behind the fan – how large is the vibration at the coupling end?
It is necessary to explain the motor load situation; otherwise, it is difficult to make a judgment
Sitting-type motors experience significant axial vibration, which is generally caused by issues with the bearing installation. It is recommended to turn the lower bearing shell (which may be the spherical back of the bearing) over to check the contact condition between the bearing shells, and to see if there are any high spots that could cause poor contact ； After preparing the bearing shells and ensuring good contact, check the interference amount of the shaft bearings, increasing it by 0.03–0.05 mm compared to the value specified in the drawings. Give it a try :)