Patent ID: 6537020
Filing Date: 2003-03-25
Classification: F01D

Abstract:
A casing structure of metal construction for a rotor blade area of an axial flow compressor and turbine stages, comprising:a closed, circular, mechanically stable outside wall; an inside wall having a circumference interrupted by a plurality of non-overlapping expansion openings, the inside wall being disposed at a slight radial distance from a rotor blade tip; and a connecting structure disposed between the inside wall and the outside wall, the connecting structure being configured to transmit a load in at least a radial direction, the connecting structure including: a multiple subdivided hollow chamber structure, the chamber structure extending at least over a portion of opposing surface areas of the inside wall and the outside wall, the chamber structure including a plurality of thin wall elements arranged upright on the inside wall and the outside wall and arranged at an angle to each other, at least a majority of the thin wall elements being directly connected together, the hollow chamber structure being connected to at least one of the inside wall and the outside wall by brazing.