Split ring floating air riding seal for a turbine
View Patent ↗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.
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.
2. The gas turbine engine of claim 1 , and further comprising:
the annular piston assembly includes an outer piston piece and outer piston head forming a single piece;
an inner piston piece and an inner piston head forming a single piece; and,
the annular cavity formed on the two piston heads.
3. A floating air riding seal comprising:
a stator;
a rotor;
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.
4. The floating air riding seal of claim 3 , and further comprising:
the annular piston assembly includes an outer piston piece and outer piston head forming a single piece;
an inner piston piece and an inner piston head forming a single piece; and,
the annular cavity formed on the two piston heads.