Redundant trip solenoid valve shut-off for gas turbine fuel syst

Details Redundant trip solenoid valve shut-off for gas turbine fuel syst Redundant trip solenoid valve shut-off for gas turbine fuel syst

1994-10-13

1996-10-08

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

Using special fuel or oxidizer

60734, F02C 7232

Patent

active

055619762

ABSTRACT:
A trip oil system automatically controls the fuel shut-off valves in an industrial gas turbine. The trip oil system applies hydraulic pressure to actuate and hold open a fuel shut-off valve so that fuel flows to the combustor of the gas turbine. When the trip oil system relieves the hydraulic pressure, the fuel shut-off valve closes and stops the fuel flow to the combustor. A bank of three solenoid valves controls the application of hydraulic pressure to each fuel shut-off valve. Hydraulic fluid conduits interconnect the three solenoid valves such that no single valve by itself can relieve the hydraulic pressure applied to the fuel shut-off valve. During normal operation of the gas turbine, all three redundant solenoid valves are activated. For the trip oil system to cause the fuel shut-off valve to close, at least two of the solenoid valves must de-energize to relieve pressure to the fuel shut-off valve.

REFERENCES:
patent: 2559814 (1951-07-01), Whittle
patent: 3168810 (1965-02-01), Gatzemeyer et al.
patent: 3805519 (1974-04-01), Plotnick et al.
patent: 4229937 (1980-10-01), Smith
patent: 4446377 (1984-05-01), Kure-Jensen et al.
patent: 4708594 (1987-11-01), Shinmei et al.
patent: 4808896 (1989-02-01), Katsuragi et al.

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