Nuovo Pignone Holding S.p.a.

Nuovo Pignone Spa

Andrea Casoni

Stefano Groppi

Gianni Bagni

Simone Bei

Guiseppe D'Alessandro

Alessandro Russo

Daniele Benericetti

Giuseppe D'alessandro

Methods and devices for performing a low torque low speed test to determine whether a rotor of a turbomachinery is free to rotate are provided. A method includes automatically applying a torque to the rotor, the torque gradually increasing up to a predetermined torque value. The method further includes monitoring the speed of the rotor while the torque is gradually increased. The method also includes outputting an indication that the rotor is free to rotate after the speed of the rotor becomes positive, or outputting an indication that the rotor is locked when the speed of the rotor remains zero and the applied torque has reached the predetermined torque value.

Methods and devices for low speed low torque testing of a rotor in a turbomachinery

A control method for a gas turbine engine is described. The control method includes, for example, corrected control parameters which are adjusted for environmental and/or operating parameters. Control of a fuel valve and a bleed valve in the gas turbine are described relative to various control algorithms.

Corrected parameter control method for a two-shaft gas turbine

In order to limit the flame temperature peaks following sudden load variations, corresponding control is planned of the position of the blades () of the distributor with variable geometry, of a single-shaft gas turbine (); in particular, the control system proposed comprises a direct-action regulator () consisting of a calculation unit (), which implements the simplified running model of the gas turbine (), and a feedback regulator (), which makes it possible to recuperate any inaccuracies of the direct-action regulator (), caused by variations of the performance of the turbine (), relative to those planned by the model, or caused by modelling errors.

System for control and regulation of the flame temperature for single-shaft gas turbines

A system to feed cooling air to a gas turbine, wherein the cooling air is taken from a high-pressure source, inside the gas turgine, and is conveyed to radial accelerators (, which give rise to the tangential acceleration of the air in the direction of the peripheral motion of the rotor surface. After it has been accelerated to the peripheral sepped of the rotor, the cooling air enters radial holes (), and, whilst passing radially through the radial holes (), undergoes a reduction in the quantity of tangential motion, Subsequently, the cooling air is released into the hollow rotor, with a correspondingly reduced outlet radius (). A series of labyrinth seals combined with brush seals separate the chamber for combined with brush seals separate the chamber for feeding of air to the radial holes (), from the low-pressure environment around the pad #() of the said gas turbine.

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Florence, Italy

Andrea Casoni