초록 ▼

The invention is embodied in a closed-cycle lubrication oil system used during turbine start-up to provide both lift oil and hydraulic oil from one system using a single variable volume pump that supplies fluid at a high pressure for lift oil requirements. The pump discharge pressure is reduced, thr

The invention is embodied in a closed-cycle lubrication oil system used during turbine start-up to provide both lift oil and hydraulic oil from one system using a single variable volume pump that supplies fluid at a high pressure for lift oil requirements. The pump discharge pressure is reduced, through a pressure regulating/reducing valve, down to hydraulic system demands. During steady-state gas turbine operation, the system provides only a flow of hydraulic oil to position the inlet guide vanes and gas valves as required by the gas turbine controls logic. During gas turbine shut-down, the system again meets both lift oil and hydraulic oil requirements. A second pump is advantageously incorporated in the preferred embodiments of the system to provide 100% redundancy in providing either lift or hydraulic oil.

대표청구항 ▼

1. A method for supplying lift and hydraulic fluid for a gas turbine comprising:pumping hydraulic fluid with a first pump at a first pressure through a first flow line, said first pressure being a pressure sufficiently high for lift system requirements for a gas turbine; selectively supplying hydrau

1. A method for supplying lift and hydraulic fluid for a gas turbine comprising:pumping hydraulic fluid with a first pump at a first pressure through a first flow line, said first pressure being a pressure sufficiently high for lift system requirements for a gas turbine; selectively supplying hydraulic fluid at said first pressure from said first flow line to a lift system for a gas turbine through a first valve; directing at least portion of the fluid pumped by said first pump from said first flow line into a second flow line for supply to a hydraulic system for the gas turbine; and reducing a pressure of the fluid flowing through said second flow line from said first pressure to a lower, second pressure for gas turbine hydraulic system requirements.