Patent ID: 7430802
Filing Date: 2008-10-07
Classification: F01D,F16J,Y10T

Abstract:
1. A method of assembling a segmented inner ring within a stationary gas turbine, comprising: a) mounting a guide vane segment to the turbine; b) mounting a securing ring to the vane segment; c) mounting an inner ring to the inner diameter of the vane segment, the inner ring having an end face; d) placing a rotor into the turbine, the rotor having an upper side wall; e) mounting a segment of an annular covering element to the rotor upper side wall, the annular covering element having a plurality of balconies arranged toward the inner ring end face; f) rotating the rotor to rotate the mounted covering element into the inner ring; g) repeating steps e) and f) such that the inner ring and covering elements form a lower portion of a labyrinth seal; h) mounting additional covering element segments on the rotor upper side wall to completely form the annular covering element ring; i) moving at least one segment of the inner ring radially inward and axially toward the covering element to completely form the inner ring and thereby completely form the seal; and j) moving a securing ring segment radially inward to engage a remaining void in the inner ring to completely form the securing ring.