Maintenance Technology May 2017 - 23

RELIABILITY STRATEGIES

Fig. 1. Pay Attention to Alignment Issues

ELECTRICAL RISK
ASSESSMENT;
ARE YOU READY
FOR OSHA?

160
140

assess
installation
for nec & osha
compliance

120

% Standard Life

100
90
80
70

assess
ppe for
safety
compliance

60
50
40
30
20

5

10

20

electrical
hazard
audit

Misalignment
Just 5/60th of a degree of angular misalignment can cut bearing life in half.
(Reference: Harris, Tedric A., A Rolling Bearing Analysis, John Wiley & Sons,
New York, 1984.)

occurs. "Better yet", he
to run for many, many
said, "they can learn
years without unplanned
If you're unsure
from the experience
downtime. While
gained at thousands
those types of assets
self-inflicted
of plants around the
may incorporate some
problems are
world and consider
components that wear
some of the most
occurring at your out, many items, such as
common root causes
bearings and gears, are
of equipment failure."
designed to provide years
site, then they
Focusing on
of trouble-free operation.
probably are.
rotating equipment,
This, however, assumes
Tranter outlined those
that all of the parts were
types of problems as follows, starting
installed correctly, the components
with the most obvious and working
are precision aligned, the bearings
backward to their root causes.
and gears are correctly lubricated, all
fasteners are tightened to the correct
torque, there is no resonance, belts are
Cause of Reliability
tightened to the correct tension, and
Problems: Imperthe rotors are precision balanced.
fect operating and
It also assumes that the equipment
maintenance practices
is operated as designed. Pumps, for
Most of the equipment in a plant
example, should be operated at their
or facility, i.e. motors, pumps, fans,
best efficiency points (BEPs). "If you
compressors, and turbines, is designed

#

3

MAY 2017

review
facility's
electrical safe
work
practices

electrical
safety
training for
your
employees

TRAINING INSTITUTE

www.avotraining.com
Let us bring the training to
your location and save
Call 877-594-3156 for a quote
MAINTENANCETECHNOLOGY.COM | 23


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Table of Contents for the Digital Edition of Maintenance Technology May 2017

Maintenance Technology May 2017 - Cover1
Maintenance Technology May 2017 - Cover2
Maintenance Technology May 2017 - 1
Maintenance Technology May 2017 - 2
Maintenance Technology May 2017 - 3
Maintenance Technology May 2017 - 4
Maintenance Technology May 2017 - 5
Maintenance Technology May 2017 - 6
Maintenance Technology May 2017 - 7
Maintenance Technology May 2017 - 8
Maintenance Technology May 2017 - 9
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Maintenance Technology May 2017 - 13
Maintenance Technology May 2017 - 14
Maintenance Technology May 2017 - 15
Maintenance Technology May 2017 - 16
Maintenance Technology May 2017 - 17
Maintenance Technology May 2017 - 18
Maintenance Technology May 2017 - 19
Maintenance Technology May 2017 - 20
Maintenance Technology May 2017 - 21
Maintenance Technology May 2017 - 22
Maintenance Technology May 2017 - 23
Maintenance Technology May 2017 - 24
Maintenance Technology May 2017 - 25
Maintenance Technology May 2017 - 26
Maintenance Technology May 2017 - 27
Maintenance Technology May 2017 - 28
Maintenance Technology May 2017 - 29
Maintenance Technology May 2017 - 30
Maintenance Technology May 2017 - 31
Maintenance Technology May 2017 - 32
Maintenance Technology May 2017 - 33
Maintenance Technology May 2017 - 34
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Maintenance Technology May 2017 - 36
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Maintenance Technology May 2017 - 40
Maintenance Technology May 2017 - 41
Maintenance Technology May 2017 - 42
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Maintenance Technology May 2017 - 47
Maintenance Technology May 2017 - 48
Maintenance Technology May 2017 - Cover3
Maintenance Technology May 2017 - Cover4
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