Turbine with radial acting seal
View Patent ↗A floating brush seal in a rim cavity of a turbine in a gas turbine engine, where the floating brush seal includes a seal holder in which the floating brush seal floats, and a expandable seal that fits within two radial extending seal slots that maintains a seal with radial displacement of the floating brush seal and the seal holder.
1. A gas turbine engine comprising:
a turbine with a stage of rotor blades;
a stator vane located adjacent to the stage of rotor blades;
an inner diameter endwall extending from the stator vane;
a rim cavity formed between the stage of rotor blades and the stage of stator vanes and a rotor disk;
a seal support extending from the inner diameter endwall and into the rim cavity;
the seal support having a radial inward facing seal slot and a brush seal holder slot;
a brush seal holder slidable within the brush seal holder slot in a radial direction;
the brush seal holder having a radial outward facing seal slot;
a brush seal secured to the brush seal holder and in contact with the rotor disk; and,
a seal secured within the radial inward facing and outward facing seal slots of the seal support and the brush seal holder;
the seal having a seal plate and an expandable member on each end that forms a seal with the radial extending seal slots.
2. The gas turbine engine of claim 1 , and further comprising:
the two radial inward facing and outward facing seal slots are of the same width and aligned in the radial direction.
3. The gas turbine engine of claim 1 , and further comprising:
the expandable member is a C-shaped seal.
4. The gas turbine engine of claim 1 , and further comprising:
the expandable member is an E-shaped seal.
5. The gas turbine engine of claim 1 , and further comprising:
the expandable member is a spring energized seal.
6. The gas turbine engine of claim 1 , and further comprising:
the expandable member is a spring loaded seal.
7. The gas turbine engine of claim 1 , and further comprising:
the expandable member is a second brush seal.
8. The gas turbine engine of claim 1 , and further comprising:
the expandable member includes one side that is flexible and an opposite side that is rigid.
9. The gas turbine engine of claim 8 , and further comprising:
the expandable member has a circular shape with the rigid side secured to the seal plate.
10. The gas turbine engine of claim 8 , and further comprising:
the expandable member has an elbow shape with the rigid side secured to the seal plate.
11. The gas turbine engine of claim 8 , and further comprising:
the expandable member has a Z-shape with the rigid side secured to the seal plate.
12. A gas turbine engine comprising:
a turbine with a stage of rotor blades;
a stator vane located adjacent to the stage of rotor blades;
an inner diameter endwall extending from the stator vane;
a rim cavity formed between the stage of rotor blades and the stage of stator vanes and a rotor disk;
a seal support extending from the inner diameter endwall and into the rim cavity;
a first seal slot formed in the seal support;
a second seal slot formed in the seal support in which the first seal slot opens into;
the second seal slot being wider than the first seal slot;
a second seal holder capable of radial displacement within the second seal holder slot;
the second seal holder having a third seal slot and a fourth seal slot;
the first seal slot is a radial inward facing seal slot;
the second seal slot is a radial outward facing seal slot;
the third seal slot is a radial outward facing seal slot;
the fourth seal slot is a radial inward facing seal slot;
a first seal secured within the first seal slot and the third seal slot;
a second seal secured within the fourth seal slot; and,
the second seal forms a seal with the rotor disk.
13. The gas turbine engine of claim 12 , and further comprising:
the first seal is capable of radial displacement within the first seal slot and the third seal slot.
14. The gas turbine engine of claim 12 , and further comprising:
the first seal slot and the third seal slot have the same width.
15. The gas turbine engine of claim 12 , and further comprising:
the first seal includes an expandable member on each end that forms a seal with the associated seal slots.
16. The gas turbine engine of claim 12 , and further comprising:
the second seal is a brush seal.