Alstom Technology Limited

General Electric Technology Gmbh

Ansaldo Energia Switzerland Ag

Stefan Irmisch

Jaroslaw Leszek Szwedowicz

Alexey Mozharov

Christoph Nagler

Erhard Kreis

Jarloslaw Leszek Szwedowicz

A rotating machine cooled by a cooling medium directed through the rotating machine in a main flow and a secondary flow includes a rotor. A stator includes a swirl passage configured to guide the secondary flow so as to be discharged from a pre-swirl nozzle. At least one control device includes a shape-memory alloy disposed in an area of the pre-swirl nozzle and is configured to control the secondary flow based on a temperature in an automated manner.

Rotating machine

A sealing arrangement for sealing a gap () between two adjacent, thermally loaded components (') of a thermal machine, especially a turbomachine or gas turbine, includes a seal () which is supported in a recess () which extends transversely to the gap () and traverses said gap (). An efficient and simple improvement of the sealing arrangement is made by the seal () being formed at least partially of a shape memory alloy in such a way that, when a pre-specified temperature limit is exceeded, the seal changes its sealing behavior.

Sealing arrangement for a thermal machine

A turbomachine which operates at enhanced operating temperatures includes a stationary component. A rotating component includes a clearance to avoid a rubbing contact between the stationary component and the rotating component, the clearance including a first value in a stationary state of the turbomachine and a second value in a steady-state operation of the machine, wherein during a transient operating phase between the stationary state and the steady-state operation, the clearance includes a value which traverses a curve having an extreme value on account of a different time variation of a rotational speed and a thermal expansion of different components. A compensating device includes a non-linear compensation mechanism configured to reduce or compensate the extreme value during the transient operating phase.

Turbomachine clearance control configuration using a shape memory alloy or a bimetal

A thermally loaded, cooled component thermally coupled to a cooling system configured to receive a gaseous cooling introduced in a forced manner from outside that flows through the cooling system so as to absorb and transport heat away from the component as a result of thermal contact with the component. The component includes at least one Helmholtz resonator configured to improve thermal contact between the cooling medium and the component.

Thermally loaded, cooled component

In a process for producing a turbine blade or vane, providing a casting mold for casting the turbine blade or vane, the casting mold including a blade or vane platform and a main blade or vane part, and a position of the main blade or vane part relative to the blade or vane platform determining a first angle of incidence; providing additional machining stock to the blade or vane platform at predetermined locations; machining the casting using a process which is specified for the first angle of incidence; rotating the casting around a longitudinal axis for an angle which is equal to the difference between said first angle of incidence and a second angle of incidence, and subjecting said rotated casting to said machining process to remove at least partially the additional machining stock.

Growing community of inventors

Oberrohrdorf, Switzerland

Stefan Irmisch