Nuovo Pignone Spa

Nuovo Pignone Tecnologie Srl

Alessandro Russo

Luciano Mei

Matteo Berti

Ya-Tien Chiu

Michele D'Ercole

Giovanni Tonno

Paolo Del Turco

Stefano Francini

Massimiliano Mariotti

Antonio Baldassarre

Mariateresa Paci

Jesse Floyd Stewart

Francesco Caratelli

Alberto Ceccherini

Marco Ulivi

Jesse F Stewart

Michele D'ercole

The gas turbine engine comprises a gas generator (), comprised of a compressor section (), and a power turbine section (). The power turbine section () comprises a power turbine rotor () supported by a power turbine shaft (), which is mechanically uncoupled from the gas generator (). The power turbine shaft () has an axial cavity () therein, fluidly coupled to a bearing sump () fluidly coupled to the compressor section () and housing at least one bearing () supporting a shaft of the gas generator (). An air venting path () extends from said axial cavity () and leads in a combustion gas flow path () downstream of the power turbine rotor ().

Venting system for bearing sump

A method is described for controlling load variations in a gas turbine. The method comprises reducing the flow of gaseous fuel entering the combustor to a predefined minimum value, if an increase is observed in the rotation regime of said turbine above a predefined maximum value and a total reduction in the load, activating a selective feeding sequence of the burners if the turbine is operating in normal functioning or premixed flame mode, modifying the angulation of the adjustable stator vanes, in order to reduce the speed rate of the compressor, and opening one or more anti-surge valves and one or more overboard bleeds, in order to reduce the air flow at the inlet of the combustor.

Method for controlling the load variations in a gas turbine

Growing community of inventors

Florence, Italy

Alessandro Russo