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Active Magnetic Bearings: as Applied to Centrifugal PumpsApplication of magnetic bearings to boiler feed pumps presents various attractive features, such as longer bearing life, lower maintenance costs, and improved operability through control of the rotordynamics. Magnetic bearings were fitted to an eight-stage, 600 hp boiler feed pump, which generates 2600 ft of heat at 680 gpm and 3560 rpm. In addition to the varied and severe operating environment in steady state operation of this pump in a power plant, it is also subjected to transient loads during frequent starts and stops. These loads can now be measured by the in-built instrumentation of the magnetic bearings. Following site installation, a follow-up bearing tune-up was performed, and pump transient response testing was conducted. The bearing response was completely satisfactory, ensuring trouble-free pump operation even in the range of reduced load. The experience gained so far through design and testing proves feasibility of magnetic bearings for boiler feed pumps, which sets the stage for application of even higher energy centrifugal pumps equipped with magnetic bearings.
Document ID
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Lev Nelik
(Ingersoll Rand (United States) Davidson, North Carolina, United States)
Paul Cooper
(Ingersoll Rand (United States) Davidson, North Carolina, United States)
Graham Jones
(Gas-Cooled Reactor Associates La Jolla, CA., United States)
Dennis Galecki
(Magnetic Bearings, Inc. VA., United States)
Frank Pinckney
(Magnetic Bearings, Inc. VA., United States)
Gordon Kirk
(Virginia Polytechnic Institute and State University Blacksburg., United States)
Date Acquired
September 6, 2013
Publication Date
May 1, 1992
Publication Information
Publication: NASA. Langley Research Center, International Symposium on Magnetic Suspension Technology, Part 1
Publisher: National Aeronautics and Space Administration
Subject Category
Mechanical Engineering
Meeting Information
Meeting: International Symposium on Magnetic Suspension Technology
Location: Hampton, VA
Country: US
Start Date: August 18, 1991
End Date: August 23, 1991
Sponsors: Langley Research Center
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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