Page 29 - Rotating Machinery Pratical Solutions to Unbalance and Misalignment

Rotating Machinery: Practical Solutions

NUMBER 2 ACID INJECTION PUMP
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No. Category Value Yes/No
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1 Hazardous Service 5.00 Y
2 Critical to Operations 3.50 Y
3 Chain Reactive 2.00 N
4 Expensive to Repair 1.50 Y
5 One of a Kind 2.00 N
6 Long, Tedious Repair 1.10 N
7 Hard to find Parts 1.10 Y
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Total Points 11.10
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This pump would score an 11.10 out of a possible 16.2 and
should be considered as a critical piece of equipment. Analysis of
this pump should be performed on a minimum of a 30-day basis,
with the results trended and reviewed by maintenance supervi-
sors. Consideration should be given to provide all possible predic-
tive techniques for this piece of equipment.

RECORDING VIBRATION DATA

When a piece of equipment is analyzed, the data should be
recorded and kept in a file for analysis and future review. Figure
1-15 illustrates a simple form for recording vibration data.
In Figure 1-15, the four basic points to measure vibration are
labeled A through D. The area for recording data has three sec-
tions; A—axial, H—horizontal, and V—vertical. Readings should
be taken and recorded for all the directions at the four identified
points.
In addition, there are locations for both filter in and filter out.
The filter in readings should be taken at multiples of the operating
speed. In the event the majority of the vibration is not located, the
entire spectrum should be scanned to determine the frequency of
the vibration.