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US 11,913,340 B2Granted
Air seal system with backside abradable layer
AssigneeRtx Corporation
InventorsDean Johnson, Thomas E. Clark
Life of this patent
Estimating the term…
Abstract
A seal system for a gas turbine engine includes a ceramic matrix composite (CMC) seal arc segment and a carrier supporting the CMC seal arc segment. The CMC seal arc segment defines radially inner and outer sides and has an abradable layer disposed on the radially outer side. There is a cooling cavity radially between the carrier and the abradable layer. The carrier includes a ridge that projects into a groove in the abradable layer and provides a labyrinth seal that partitions the cooling cavity into sub-cavities.
Claims11
A seal system for a gas turbine engine comprising:
- a ceramic matrix composite (CMC) seal arc segment defining radially inner and outer sides and having an abradable layer disposed on the radially outer side;
- a carrier supporting the CMC seal arc segment;
- a cooling cavity radially between the carrier and the abradable layer;
- and
- the carrier including a ridge projecting into a groove in the abradable layer and thereby providing a labyrinth seal that partitions the cooling cavity into sub-cavities, the ridge having a knife edge.
2 more elements
A gas turbine engine comprising:
- a compressor section;
- a combustor in fluid communication with the compressor section;
- and
- a turbine section in fluid communication with the combustor, the turbine section having a seal system disposed about a central axis of the gas turbine engine, the seal system including:
- a ceramic matrix composite (CMC) seal arc segment defining radially inner and outer sides and having an abradable layer disposed on the radially outer side;
- and
- a carrier supporting the CMC seal arc segment;
- a cooling cavity radially between the carrier and the abradable layer;
- and
- the carrier including a ridge projecting into a groove in the abradable layer and thereby providing a labyrinth seal that partitions the cooling cavity into sub-cavities, the ridge having a knife edge.
7 more elements
Dependencies are inferred from the claim text.