F - Mech Eng,Light,Heat,Weapons – 01 – D
Patent
F - Mech Eng,Light,Heat,Weapons
01
D
F01D 11/12 (2006.01)
Patent
CA 2326992
The profiled surface is used as an abradable (1) in flow machines. In these machines blade tips (2) move over the profiled abradable in a predetermined direction (v). In so doing they produce a partial surface, an abraded surface (10), which is formed by material ablation. The profiling of the surface is formed by ribs (15) which surround chamber- like depressions (11). A rib direction can in each case be associated with the ribs. The abradable (1) forms a pattern which is built up of strip-like elements (5) and the elements of which lie in the directions of the ribs on connection lines (45) between corner points (41, 42; 43, 44) of a reference grid (40). Largely at each location of the abraded surface (10) - i.e. at least at more than 80 - 95% of the abraded surface - the rib direction differs from the direction of movement (v) of the blade tips (2). For at least two thirds of the abraded surface the direction of movement deviates from the rib direction by more than 30°, preferably more than 45°. The strip-like elements (5) of the abraded surface can be curved as well as discrete and/or partly connected strips.
Ghasripoor Farshad
Muller Eduard
Fetherstonhaugh & Co.
Sulzer Metco Ag
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