Page 326 - Intro Predictive Maintenance
P. 326
Failure-Mode Analysis 317
Figure 14–30 Result of misalignment or nonparallel
operation on brush rolls.
Figure 14–31 Rolls in series.
alignment is to analyze a series of rolls rather than individual (or a single pair of)
rolls. This approach is consistent with good diagnostic practices and provides the
means to isolate misaligned rolls and to verify strip tracking.
Strip tracking. Figure 14–31 illustrates two sets of rolls in series. The bottom set
of rolls is properly aligned and has good strip tracking. In this case, the vibration
profiles acquired from the operator- and drive-side bearing caps are nearly identical.
