In this article, we consider a practical example of the diagnosis of extraneous noise from a pump D 2500-62-3 (N = 500 kW, n = 750 rpm) from the side of bearing No. 4. We identify the defect and determine the root cause of its formation.

One of the common reasons for calling a specialist in vibration diagnostics is noise from the unit. Sometimes the reasons are commonplace: a plastic bottle stuck between the fan blades (noise + vibration), lack of tightness of the door to the air conditioning fan chamber (whistling noise), faulty pressure valve in the ventilation network (periodic noise + vibration), etc. But more often, extraneous noise is a consequence of mechanical problems of the unit, which are the task of technical diagnostics to identify.