 |
|
 |
The United Nations of
Ultrasound |
|
|
|
In This Issue:
|
April 2004
|
|
|
|
|
|
|
|
|
Acoustic Lubrication
Tip |
|
|
|
|
|
|
|
United Nations
Baseball Cap
|
|
|
|
|
Lubrication Panel at
Lube Excellence
|
|
|
|
|
|
|
|
Surveyor Awarded
Lloyds Certification
|
|
|
|
|
|
|
|
Case Study Contributions
Wanted!!!
Pursuing our mandate to
share and educate ultrasound
users from around the world,
we humbly solicite your
stories, experiences, and
ideas. Do you have user tips
and tricks? Have you any
special methods or
applications for airborne
ultrasound developed to
solve a particular problem
in your facility? The User
Group wants to read about
it.
We've created a special
place at the User Group
website for you to tell us
all. Click on the link below
to go to the User Forum page
and start typing.
Each month we'll publish the
best of the best in The
United Nations of Ultrasound
and the User Group Home
Page. (We reserve the right
to edit and/or refuse
content deemed inapproriate
for the group).
All submissions will be
entered into a drawing for a
united nations baseball cap
(one per month).
|
|
|
|
|
|
|
Congratulations to Paul
Taylor of Taylor
Engineering, Trinidad West
Indies. Paul recently
completed the SDT Sherlog TA
Ultrasonic Hatch Cover
Certification training in
New Orleans. Following his
certification, approved by
the Nautical Institute, Paul
received recognition from
Lloyds Register of Trinidad
as a Lloyds certified
ultrasonic hatch cover
inspector. The certificate
is issued in accordance with
IACS unified requirement
(UR) Z17.
Paul Taylor can be reached
at
tayeng@trinidad.net
|
|
|
|
|
|
|
Condition based lubrication
using ultrasonic monitoring
is replacing time based
scheduling, the standard set
by most electric motor
manufacturers. Ultrasonic
monitoring trends the
frictional forces present in
the bearing and determines
early breakdown of the
hydrodynamic oil film.
Re-greasing the motor
bearings is best done with
the aid of an ultrasonic
system that can interface
its sensor to any grease
gun. Before lube technicians
can use ultrasonic
techniques to re-grease
electric motor bearings they
need to have a full
understanding of the
installation. Without
knowledge of some basic
lubrication fundamentals
more harm than good will
come from re-lubrication.
Some points to remember are:
1. Determine if the bearings
can even be re-greased.
Sealed bearings cannot.
2. What type of grease is to
be used? Dont mix
incompatible greases.
Designate an Acoustic Grease
Gun Adaptor for each type of
grease used, and if you must
change from one grease gun
to another be sure to
thoroughly clean the Adaptor
first.
3. Have clear access to the
drain and fill fittings and
ensure the drain port is
open
4. The drain port could be
obstructed by dried
lubricant! Use a CLEAN wire
brush to ensure there is no
blockage prior to adding
grease.
5. Is the bearing open
faced, shielded, double
shielded or sealed? In some
motors more than one type of
bearing is used. Knowing the
bearing type will affect how
the bearing is lubricated.
Sealed bearings cannot be
re-greased. Shielded or
double shielded bearings can
be re-greased but the grease
must be added slowly to
avoid pressurizing the
cavity and pushing the seals
against the cage.
Consult OEM specs to know
what you are greasing before
you grease it. Then,
considering the above
points, follow the protocol
for ultrasonic greasing.
These protocols are
available from the
manufacture of your
ultrasonic instrument.
|
|
|
|
|
|
|
Leaders from the ultrasound
community headed a panel
discussion on ultrasonic and
acoustic techniques for
lubrication of motor
bearings recently at Noria's
Lubrication Excellence
conference in Nashville, TN.
On panel were:
Allan Rienstra, SDT North
America
Shawn King, Allemite
Corporation
Mark Goodman, UE Systems
Ray Garvey, Computation
Systems
Gary Latham, UVLM
About 60 interested
attendees directed pointed
questions about the state of
acoustic technology and its
significant use for
re-greasing rolling element
bearings. Questions such as
"how to determine proper
re-greasing intervals based
on ultrasonic dBuV
measurements" and "when to
start greasing and when to
stop" were the major topics
discussed. The consensus was
that ultrasonic technology,
combining condition
monitoring for both interval
determination and grease
application will prevail as
the technology of choice for
condition based lubrication
of rolling element bearings.
It was also agreed that more
discussion on this topic
will be beneficial. Stay
tuned for next years
panel.....
|
|
|
|
|
 |
|
|
