Patent ID: 9546560
Date: 2017-01-17
CPC Classifications: F01D,F02C,F05D,F16J,Y02T

Claim:
1. A method for sealing a gap between first and second coaxial shafts of a gas turbine engine comprising the steps of: positioning a first seal housing supporting a first seal having a first configuration adjacent the first shaft, the first seal housing comprising a first radially-extending flange and a first axially-extending flange, the first radially-extending flange disposed radially outboard from the first axially-extending flange, with respect to a shaft axis, the first axially-extending flange disposed radially outboard from a radially inner surface of the first seal housing, and the first seal retained against the first axially-extending flange; positioning a second seal housing supporting a second seal having a second, configuration adjacent the second shaft, the second seal housing comprising a second radially-extending flange and a second axially-extending flange, and the second seal retained against each of the second radially-extending flange and the second axially-extending flange; supporting the first seal housing radially outboard of a common support defining at least a radially inner surface facing radially inwardly with respect to the shaft axis, the radially inner surface of the common support opposite a radially outer surface defined by the common support facing radially outwardly with respect to the shaft axis and positioned radially inwardly from the second axially-extending flange of the second seal housing, the common support including a body extending radially outwardly with respect to the shaft axis, and the common support further including at least one flange extending radially outwardly from an outer perimeter of the common support; biasing the first seal housing in a first axial direction away from the common support with at least one first biasing member disposed radially outboard from the first axially-extending flange and disposed against the body of the common support and the first radially-extending flange of the first seal housing; supporting the second seal housing radially inward of the common support; biasing the second seal housing in a second axial direction opposite the first axial direction, away from the common support, with at least one second biasing member disposed radially outboard from the second axially-extending flange of the second seal housing and against the body of the common support and the second radially-extending flange of the second seal housing; fixing the common support to a static structure via the at least one flange of the common support; assembling a first radial seal in a groove defined in the radially outer surface of the common support and in contact with the radially inner surface of the first seal housing, the radially inner surface of the first seal housing facing radially inwardly with respect to the shaft axis, the first radial seal disposed at a first inner diameter and a first outer diameter relative to the shaft axis; and assembling a second radial seal in a groove defined in the second seal housing and in contact with the radially inner surface of the common support, the second radial seal disposed at a second inner diameter and a second outer diameter relative to the shaft axis; wherein the second inner diameter is different from the first inner diameter; or the second outer diameter is different from the first outer diameter.