Patent ID: 7670108
Filing Date: 2010-03-02
Classification: F01D,F05D

Abstract:
1. An air seal unit adapted to be positioned adjacent blade structure in a gas turbine comprising: a main body having a front edge, a rear edge, first and second side edges, an upper surface and a lower surface, said lower surface being adapted to be positioned adjacent blade structure in a gas turbine, said main body including a plurality of first impingement cavities and at least one first interconnecting passage extending between and communicating with a first pair of said first impingement cavities, said first interconnecting passage being nonparallel to said first pair of said first impingement cavities and defining a path for cooling air to pass from one of said first pair of said first impingement cavities to another of said first pair of said first impingement cavities so as to strike a wall defining at least a part of said other of said first pair of said first impingement cavities; said at least one first interconnecting passage comprising a plurality of first interconnecting passages, a first group of said first interconnecting passages extend between said first pair of said first impingement cavities and a second group of said first interconnecting passages extend between a second pair of said first impingement cavities, said second pair of said first impingement cavities including an impingement cavity from said first pair of said first impingement cavities; and wherein said first group of said first interconnecting passages are staggered relative to said second group of said first interconnecting passages.