High efficiency 2-stage fuel pump and control scheme for gas turbines
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United States of America Patent
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Aug 10, 2010
Grant Date -
Nov 27, 2008
app pub date -
Nov 15, 2005
filing date -
Nov 19, 2004
priority date (Note) -
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Abstract
A two-stage system for delivering fuel to a gas turbine including a first stage variable pump for serving as a primary source of fuel, a second stage fixed pump for selectively supplementing the variable pump, a bypass valve connected to the fixed pump for loading and unloading the fixed pump and a regulator valve assembly connected to the variable pump and the bypass valve for controlling operation of the variable pump and the bypass valve. Preferably, the two-stage system also includes a control valve connected to the regulator valve assembly for setting a pressure differential across the regulator valve assembly and, thereby, loading and unloading the fixed pump.
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