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Pump Rotordynamics Made Simple
(Texas A&M University. Turbomachinery Laboratories, 1998)
One of the foremost concerns facing pump users today is that of rotordynamics. As pump speeds have increased to provide improved efficiencies and lighter packages, rotordynamics has assumed a significantly greater role in ...
Hydraulically Rerating Centrifugal Pumps To Improve Reliability
(Texas A&M University. Turbomachinery Laboratories, 1998)
The authors present two case studies where improperly applied hydraulics resulted in poor mechanical reliability, due to chronic flow instability problems. A successful hydraulic rerate of these pumps, which required minimal ...
Experience In The Use Of Flexure Pivot Tilt Pad Bearings In Boiler Feed Water Pumps
(Texas A&M University. Turbomachinery Laboratories, 1998)
Boiler feedwater (BFW) pumps are among the most critical rotating equipment in power plants. The bearings in these pumps must be able to attenuate rotor vibrations and other hydraulic forces while still maintaining a high ...
Polymer Composite Industrial Chemical Pumps
(Texas A&M University. Turbomachinery Laboratories, 1998)
Polymers are important materials in the design and application of pumps and piping in many chemical processing systems today. The ability of polymer composites to resist chemical attack is the primary reason for use in ...
Severe Suction Bell Damage In Large, Open Impeller, Vertical Turbine Pumps
(Texas A&M University. Turbomachinery Laboratories, 1998)
Sixteen (nine 1500 hp and seven 500 hp) single stage, vertical turbine, cooling water pumps suffered massive metal loss within two years of installation. All pumps had cast iron suction bells and semiopen, manganese bronze ...
Computer Simulation Of The Flowpath In Magnetic Sealless Pumps
(Texas A&M University. Turbomachinery Laboratories, 1998)
For applications that involved fluids with a high rate of change of vapor pressure or low specific heat, it was found that there could be inadequate flow through the thrust bearing. This effect was compounded by the heat ...
CFD Analysis Of A Double Suction Cooling Water Pump
(Texas A&M University. Turbomachinery Laboratories, 1998)
In 1991, four large double suction cooling pumps were installed at a chemical plant in Texas. Although these pumps met performance specifications on the test stand, they proved to be noisy when installed. Sound power levels ...
Using Fiber-Optic Pressure Sensors To Detect Cavitation And Flow Instabilities In Centrifugal Pumps
(Texas A&M University. Turbomachinery Laboratories, 1998)
This paper introduces the benefits of applying the fiber-optic Fabry-Perot interferometer (ffpi) pressure sensor as a means of detecting cavitation and flow instabilities in centrifugal pumps. The need for monitoring dynamic ...
Effects Of Entrained Air, NPSH Margin, And Suction Piping On Cavitation In Centrifugal Pumps
(Texas A&M University. Turbomachinery Laboratories, 1998)
Explanations and guidelines for the phenomena of cavitation noise above the NPSHR of a pump are presented, backed by laboratory and field tests. The hydraulic Institute Concepts of low, and very high suction energy, and ...
Cavitation Effects On Pump Thrust Leading To Bearing Failures
(Texas A&M University. Turbomachinery Laboratories, 1998)
As part of a major California refinery expansion project, a Delayed Coker was engineered with two heater charge pumps. Unfortunately, during the initial operations, both pumps failed within a few days of each other, causing ...