Turbine engine with a seal
A turbine engine includes an engine core defining a higher pressure region and a lower pressure region. A seal can fluidly separate the higher pressure region from the lower pressure region and be movably mounted to a component within the turbine engine, where a side of the seal can confront the component.
1. A turbine engine comprising:
an engine core comprising at least a compressor section, a combustor section, and a turbine section in axial flow arrangement and defining a rotor and a stator, multiple, axially spaced stages of paired rotating blades, carried by the rotor, and stationary vanes, carried by the stator, and defining a higher pressure region on one of an upstream or downstream side of the stationary vanes for a given stage and a lower pressure region on the other of the upstream or downstream side of the stationary vanes for the given stage;
a seal fluidly separating the higher pressure region from the lower pressure region and movably mounted to the stator, the seal having a first side confronting the stator and a second side confronting the rotor; and
an air supply conduit fluidly coupling the higher pressure region to at least one of the first side and the second side of the seal a first counterbore in a portion of the stator that confronts the first side, wherein the first counterbore is fluidly coupled to the air supply conduit; and
a second counterbore in a portion of the rotor that confronts the second side and is fluidly coupled to the air supply conduit.
2. The turbine engine of claim 1 further comprising a spring configured to apply an axial force to the seal.
3. The turbine engine of claim 2 further comprising a second spring configured to apply a second force to the seal, the second force being non-aligned with the axial force.
4. The turbine engine of claim 1 wherein the seal comprises one of carbon, steel, or a nickel alloy.
5. The turbine engine of claim 1 wherein the seal further comprises a plurality of segments.
6. The turbine engine of claim 1 further comprising a wear coating on one of the seal, the rotor, or the stator.
7. The turbine engine of claim 1 further comprising a stator cooling passage fluidly coupling the higher pressure region to the first side of the seal.
8. The turbine engine of claim 1 further comprising a rotor cooling passage fluidly coupling the higher pressure region to the lower pressure region.
9. A turbine engine comprising:
an engine core comprising at least a compressor section, a combustor section, and a turbine section in axial flow arrangement and defining an outer rotor and an inner rotor which rotates in a direction opposite the outer rotor, multiple, axially spaced stages of paired inner blades carried by the inner rotor, and outer blades, carried by the outer rotor, and defining a higher pressure region on one of an upstream or downstream side of the inner or outer blades for a given stage and a lower pressure region on the other of the upstream or downstream side of the inner or outer blades for the given stage;
a seal fluidly separating the higher pressure region from the lower pressure region and movably mounted to one of the outer rotor or the inner rotor, the seal having a first side confronting the one of the outer rotor or the inner rotor and a second side confronting the other of the outer rotor or the inner rotor; and
an air supply conduit fluidly coupling the higher pressure region to at least one of the first side and the second side of the seal; and
a counterbore in a portion of at least one of the outer rotor and the inner rotor that confronts one of the first or second sides, wherein the counterbore is fluidly coupled to the air supply conduit.
10. The turbine engine of claim 9 further comprising a wear coating on one of the seal, the outer rotor, or the inner rotor.
11. A method of reducing a pressure differential across a seal having at least one of a first side and a second side, the seal movably mounted to a stator or a rotor of a gas turbine engine having multiple, axially arranged stages of paired rotating blades and stationary vanes, and between a higher pressure region and a lower pressure region, wherein an air supply conduit fluidly couples the higher pressure region to the at least one of the first side and the second side, the method comprising:
supplying, via the air supply conduit, air from the higher pressure region to the at least one of the first side confronting the stator and the second side confronting the rotor of the seal movably mounted to the stator or the rotor, wherein a first counterbore in a portion of the stator that confronts the first side, and wherein the first counterbore is fluidly coupled to the air supply conduit, and a second counterbore in a portion of the rotor that confronts the second side, and wherein the second counterbore is fluidly coupled to the air supply conduit.
12. The method of claim 11 wherein the supplying further comprises supplying air through the rotor to the at least one of the first side and the second side.
13. The method of claim 12 wherein the supplying further comprises supplying air through the stator to the at least one of the first side and the second side.
14. The method of claim 11 wherein the supplying further comprises supplying air through the seal to the at least one of the first side and the second side.
15. The method of claim 11 further comprising exerting, via a spring, an axial force on the seal.
16. The method of claim 15 further comprising exerting, via a conduit outlet, a fluid force on the at least one of the first side and the second side of the seal.
17. The method of claim 16 wherein the fluid force counteracts the axial force.