Alstom Technology Limited

Ansaldo Energia Switzerland Ag

Alstom (switzerland) Ltd

Martin Balliel

Marco Lamminger

Frank Gersbach

Stefan Andreas Retzko

Maxim Konter

Igor Tsypkaykin

Christoph Didion

Dietrich Eckardt

Marcel Koenig

Thomas Duda

Julien Nussbaum

Cornelia Santner

Andreas Weiland

A rotating blade for a gas turbine includes an airfoil extending in a longitudinal direction and having a leading edge and a trailing edge, whereby the airfoil is bordered at its outer end by a tip shroud, whereby the airfoil includes two or more internal passages, which run in longitudinal direction and are separated by solid webs, and whereby a plurality of shroud fins is arranged on top of the tip shroud to improve gas sealing against a corresponding stator heat shield. The stability and life time of the blade can be enhanced by selecting a position of each of the shroud fins to be exclusively above one of the webs and/or a leading edge wall.

Rotating blade for a gas turbine

A rotating gas turbine blade is disclosed which includes an airfoil with a suction side and a pressure side, the airfoil extending in a radial direction from a blade root to a blade tip. The blade tip includes a tip shroud, the airfoil having internal cooling passages for a cooling medium, which extend through the tip shroud. Outlet ports are provided above a selected internal airfoil cooling passage for the cooling medium to be ejected above the tip shroud in a direction of the blade's pressure side. Dust accumulation is avoided at the tip end of the selected internal cooling passage.

Rotating gas turbine blade and gas turbine with such a blade

A hollow-cast casting is provided, which includes at least one core opening that is caused by the production technique and which has a closure device that closes the core opening. The closure device can be inserted into the core opening axially in relation to the core opening and provides at least one surface region which, in axial projection in relation to the core opening, can be made to abut a surface region of the casting that is facing toward the casting. The surface region lies radially outside a cross-sectional area predetermined by the core opening.

Hollow-cast casting with a closure device

A method of casting a directionally solidified (DS) or single crystal (SX) article with a casting furnace having a heating chamber (), a cooling chamber (), a separating baffle () between the both chambers includes a first step in which the shell mould () is filled with liquid metal (), and the liquid metal () is directionally solidified by withdrawing the shell mould () from the heating to the cooling chamber (). An inert gas impinges from nozzles () arranged below the baffle () on the shell mould () and in steep transitions in outer surface area of the shell mould () the flow of the inert gas () is reduced or even stopped and when a protruding geometrical feature has passed the impingement area of the gas jets, the gas flow () is restored to a value adjusted to the geometry of the cast part presently passing the impingement area.

Method for casting a directionally solidified article

A casting furnace ( ) for producing castings which are directionally solidified in monocrystalline and polycrystalline form. The casting furnace ( ) includes an upper heating chamber ( ), which is equipped with a heating chamber wall ( ) which contains at least one heater element, a lower cooling chamber ( ), and contains a casting mold ( ) which is moved by means of a conveyor device. Inside the heating chamber ( ) there is an internal heater ( ) which heats the inner surfaces of the casting pieces ( ), which are shielded from the casting mold ( ), and thus prevents the solidification front from sloping inside the casting pieces ( ).

Casting furnace with centrally located heating element for producing directionally solidified castings

Growing community of inventors

Bassersdorf, Switzerland

Martin Balliel