High-speed pump bearing housing experiences high vibration
Thread Content
Today, a high-speed pump with a rotational speed of around 12,000 rpm was just overhauled. It has three shafts in its bearing housing – the high-speed shaft, the intermediate shaft, and the low-speed shaft. During operation after the overhaul, the vibration of the bearing housing was quite high. What could be the reason for this? (During maintenance, it was found that the bearings on the low-speed shaft and intermediate shaft had worn on their outer surfaces; there were defects during installation.)
It is possible to test a vibration spectrum and provide the rotation speeds of the three axes?
Was the gear meshing condition not checked?
Good heavens, even high-speed pumps dare to have defects! The parallelism and alignment of the gears have clearly changed, resulting in poor meshing; a new bearing sleeve was installed, and the contact condition between the gears was measured, as well as the meshing clearance