Patent ID: 9464536
Filing Date: 2016-10-11
CPC Classification: F01D

Claim Text:
1. A sealing arrangement for a turbine system comprising: a bucket having an outer tip and a plurality of bucket ridges extending radially outwardly from the outer tip, wherein the plurality of bucket ridges extend lengthwise along the outer tip in one or more first directions and comprises a concave or convex curved portion that faces toward a first or a second side between leading and trailing edges, and each of the plurality of bucket ridges comprises an abradable material; a stationary shroud disposed radially outwardly from the outer tip of the bucket, wherein the stationary shroud comprises an inner surface radially opposite from the outer tip; and a plurality of shroud ridges extending radially inwardly from the inner surface of the stationary shroud toward the outer tip of the bucket, wherein the plurality of shroud ridges extend lengthwise along the inner surface in one or more second directions crosswise to the one or more first directions, a width of a spacing between adjacent shroud ridges of the plurality of shroud ridges is greater than a width of each shroud ridge of the plurality of shroud ridges, the plurality of bucket ridges are staggered relative to the plurality of shroud ridges, and each of the plurality of shroud ridges comprises the abradable material.