Shaft Eccentricity Measurements with SKF Multilog On-line Protection System DMx

What is eccentricity monitoring?

Shaft eccentricity is a measurement of the mechanical, thermal, or gravity bow of a rotor assembly at slow roll speeds as shown in Figure 1. This bow must be minimized prior to operation of a large machine train to prevent vibration and possible machine damage, caused by rotating parts of the rotor assembly contacting stationary parts of the machine case. This contact of rotating and stationary parts is referred to as “radial rub occurrence.”

Figure 1.