Alstom Technology Limited

Alstom (switzerland) Ltd

Alexander Hoffs

Herbert Brandl

Alexander Ralph Beeck

Roland Muecke

Sergej Riazantsev

This arrangement relates to a moving blade (), cast in one piece, for a turbomachine, in particular a turbine or compressor, comprising an aerodynamically shaped profile body () which has a shroud band (). The shroud band () projects beyond the profile body () in the circumferential direction () and has a fin (). The fin () possesses a base portion (), a transitional portion () and a sealing portion (). An axially measured wall thickness decreases in a transitional portion () from the base portion () to the sealing portion (). To avoid a porous structure in the base portion (), two depressions (), which reduce the wall thickness of the base portion (), are integrally molded on the outside of the base portion ().

Moving blade for a turbomachine

The invention relates to a method for producing a cast part of a thermal turbo-machine by way of a known casting process. Between a model mold and a ceramic insert, projections are located on the ceramic insert, whereby the projections have an angle (&agr;, &bgr;) between the center line and the outer edge of the projections of less than 30&deg;, and whereby the projections are used both for the fixation of the insert during the casting process and for the reduction of the notch factor inside the recesses created in the cast part.

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West Palm Beach, FL, United States of America

Alexander Hoffs