Split ring floating air riding seal for a turbine

摘要

A floating air riding seal for a gas turbine engine with a rotor and a stator, an annular piston chamber with an axial moveable annular piston assembly within the annular piston chamber, an annular cavity formed on the annular piston assembly that faces a seal surface on the rotor, and a central passage connecting the annular cavity to the annular piston chamber to supply compressed air to the seal face, where the annular piston assembly is a split piston assembly to maintain a tight seal as coning of the rotor disk occurs.

主权项

1. A gas turbine engine comprising:
a stator with a stator vane; a rotor with a rotor blade; an annular piston chamber formed in the stator; a floating air sealing surface formed on the rotor; an annular piston assembly axially moveable within the annular piston chamber; an annular cavity formed on an end of the annular piston assembly that faces the floating air sealing surface on the rotor; a central passage formed in the annular piston assembly to connected the annular cavity to the annular piston chamber to supply compressed air to the annular cavity; and, the annular piston assembly being a split piston assembly so that a seal is maintained on the sealing surface of the rotor when coning occurs.