Alstom Technology Limited

Ansaldo Energia Switzerland Ag

Ansaldo Energia IP UK Limited

Jose Anguisola McFeat

Christoph Nagler

Sergei Riazantsev

Erich Kreiselmaier

Brian Kenneth Wardle

Marcel Koenig

Jörg Krückels

Klaus Döbbeling

Ingolf Schulz

Gerard Dusomos

Dirk Wilhelm

Roland DÜCKERSHOFF

Sergei Riazanstev

A gas turbine having a compressor section provided with a plurality of compressor blades and vanes for compressing air; a combustion section; a turbine section a rotor having an axis and extending from a compressor section to the turbine section for supporting the compressor and turbine blades, the rotor having a last rotor disk having a downstream portion for supporting a bearing cover and an upstream portion for supporting a last turbine blade; and a cooling duct system configured for supplying cooling air from a downstream end of the turbine section to the last turbine blade passing inside the last rotor disk, and having an axial bore in the downstream portion of the last rotor disk along the rotor axis; and a first plurality of inclined radial bores in the upstream portion of the last rotor disk off the axis.

Last turbine rotor disk for a gas turbine, rotor for a gas turbine comprising such last turbine rotor disk and gas turbine comprising such rotor

The disclosure relates to a hollow gas turbine vane that is cooled by an arrangement configured to sequential cooling an endwall of the vane and its airfoil and, at the same time, the two endwalls of the vane. This arrangement can reduce cooling air demand, which can have a positive effect on the turbines efficiency.

Gas turbine vane with improved cooling

The guide vane of a gas turbine comprises a blade having an outer platform connectable to a guide vane carrier or gas turbine casing, and at the opposite end an inner platform that carries a cover plate. The inner platform has a dovetail housing to which the cover plate is connected. The method for replacing the cover plate consists in separating the cover plate from the inner platform by cutting along the profile of the dovetail housing, then making the cover plate to slide out of the dovetail housing, thus inserting a new or refurbished cover plate into the dovetail housing.

Guide vane of a gas turbine and method for replacing a cover plate of a guide vane of a gas turbine

A stator blade for a gas turbine includes a blade airfoil extending in a longitudinal direction of the blade and is delimited by leading and trailing edges. The stator blade includes a shroud, whose inner side is exposed to hot gas which flows through the gas turbine. A hook-like fastening element for fastening the stator blade on a casing of the gas turbine projects outwards in the region of the trailing edge. The fastening element has a locating slot above the trailing edge for fixing a heat shield, which is connected to the shroud in the flow direction of the hot gas. A cavity is provided on the shroud between the locating slot for the heat shield and the trailing edge of the blade airfoil for reducing the thermal and mechanical stresses in the region of transition between the trailing edge and shroud.

Guide vane for a gas turbine

A gas turbine blade shroud includes a platform and one or more fins extending toward a stator and side rails that extend radially toward the stator and along the edge of the platform. The increased wall thickness in the side regions of the blade shroud effects an increase in stiffness and a decrease in deformation during turbine operation. Due to a localised increase in wall thickness the mass of the blade shroud can be minimized such that mechanical loading is not significantly increased. The side rails can improve a lining up of adjacent blades and decrease a probability of hot gas leakage into the cavity between blade shroud and stator. The side rails have profile shapes that can be optimised in view of stiffness and mechanical loading and are suitable for casting. The blade shroud with side rails can have an improved life time.

Gas turbine blade shroud

Growing community of inventors

Lauchringen, Germany

Jose Anguisola McFeat