Alstom Technology Limited

Kurt Rubischon

Wolfgang Kappis

René Bachofner

Herbert Brandl

Christoph Nagler

Erich Kreiselmaier

A rotor is provided for an axial-throughflow turbo machine, which carries a plurality of moving blades which are each pushed with a blade root into a rotor groove extending about the axis and are held. The blade root includes a hammer root with a hammerhead and is supported on radial stop faces of the rotor groove which lie further outward in the radial direction, against centrifugal forces acting on the moving blades, and are supported on axial stop faces lying further inward in the radial direction, against axial forces which act on the moving blade. The rotor groove has at its bottom, to reduce thermal stresses, an axially and radially widened bottom region with a continuously curved cross-sectional contour. In such a rotor, an advantageous adaptation of the blading is achieved by the blade root of the moving blades being adapted to the widened bottom region in the radial direction.

Rotor for an axial-throughflow turbomachine and moving blade for such a rotor

A compressor has a rotor (), which rotor () has a number of rows of rotor blades () which are at a distance from one another, one behind the other in the axial direction, with a number of thermal barrier segments (), which are detachably attached to the rotor () and are mounted such that they can move in the circumferential direction, being arranged one behind the other in the circumferential direction on the circumference of the rotor (), and with securing devices () being provided on the thermal barrier segments (), which secure the thermal barrier segments () against being moved in the circumferential direction. In the case of such a rotor (), production and assembly are simplified in that only some of the thermal barrier segments () are equipped with the securing devices ().

Compressor rotor

A rotor end piece () for a rotor of a thermal turbomachine, having at least one circumferential slot () in which press blades, intermediate pieces and two end blades (), between which a residual gap is formed, are fitted, the rotor end piece () having two end piece halves () and a wedge (), is characterized in that a clip () is arranged in the residual gap, this clip () absorbing the forces of the two end piece halves () and two shim halves () arranged between the end piece halves () and restrained with the wedge (). As a result, the disadvantages of the prior art are avoided and a rotor end piece is provided which exerts no axial forces on the rotor and no forces on adjacent blades in the circumferential direction, so that an occurrence of disturbing rotor vibrations and jamming of adjacent blades is effectively avoided.

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Lengnau, Switzerland

Kurt Rubischon