Patent ID: 8501297
Filing Date: 2013-08-06
Classification: F01D,F05D,Y10T

Abstract:
1. A honeycomb structure for nonhermetic seals in turbine machines having a sealing edge that rotates relative to the honeycomb structure on an axis of rotation, the honeycomb structure comprising: a plurality of at least predominantly radially oriented honeycomb cells defined by separating cell walls and open on one side; cell walls cooperating by their free edges with the sealing edge, the cell walls yielding relative to the sealing edge by being deformed and/or by ablation of material when contact is made; and wherein the cell walls of the honeycomb cells are provided with holes according to a defined perforation pattern and wherein the defined pattern comprises several radially staggered rows of holes, the holes of each row having a defined, at least substantially constant radial spacing from the respective free edges of the cell walls and wherein the number of holes within a row decreases from one row to another with increasing radial distance from the free edges of the cell wall.