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Posted by -zero on March 29, 2008, 12:32 am
This copy/paste comes from:
Shaft Alignment Handbook By John Piotrowski
http://books.google.com/books?id=b2Qsst8UBEYC
Are you John Piotrowski?
-zero
> BENEFITS OF GOOD MACHINERY ALIGNMENT
> Industry worldwide is losing billions of dollars a year due to
> misalignment of machinery. The
> heart and soul of virtually every industrial operation pivots on
> keeping rotating machinery in
> good working order. Countless processes are dependent on the
> successful operation of
> rotating machines that produce electric power, fuels, paper, steel,
> glass, pharmaceuticals,
> the food we eat, the clothes we wear, the buildings we live and work
> in, and the vehicles that
> transport us across the surface of the Earth. Just about everything
> you see around has
> somehow been influenced by rotating machinery of some kind.
> The primary objective of accurate alignment is to increase the
> operating life span of
> rotating machinery. To achieve this goal, machinery components that
> are most likely to fail
> must operate well within their design limits. As the parts that are
> most likely to fail are the
> bearings, seals, coupling, and shafts, the accurately aligned
> machinery will reduce excessive
> axial and radial forces on the bearings to insure longer bearing life
> and rotor stability under
> dynamic operating conditions. Precise alignment will reduce the
> possibility of shaft failure
> from cyclic fatigue; it will minimize the amount of wear in the
> coupling components, alleviate
> the amount of shaft bending from the point of power transmission in
> the coupling to the
> coupling end bearing, and it will maintain proper internal rotor
> clearances.
> In a nutshell, accurate alignment will do nothing, but the good things
> and the key part of
> making this happen centers on the people who are responsible for
> installing, troubleshooting,
> maintaining, and operating this machinery
> Millwright Ron
> www.unionmillwright.com
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