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US 10,233,938 B2Granted
Organic matrix abradable coating resistant to clogging of abrasive blade tips
AssigneeUnited Technologies Corporation
InventorChristopher W Strock
Life of this patent
Estimating the term…
Abstract
An abradable seal comprises an organic matrix composite comprising an additive and an organic component, the additive is configured to prevent adhesion of the organic component onto an abrasive blade tip.
Claims18
An abradable seal comprising:
- an organic matrix composite comprising an additive and an organic component, said additive configured to prevent adhesion of said organic component onto a component that may contact the abradable seal, wherein said additive comprises a metal stearate.
A gas turbine engine system comprising:
- a compressor section;
- a combustor fluidly coupled to said compressor section;
- a turbine section fluidly coupled to said combustor;
- a fan rotatably coupled with said turbine section, said fan including a plurality of circumferentially-spaced rotary blades, each of said blades comprising an airfoil section extending between leading and trailing edges, first and second opposed sides each joining the leading and trailing edges and an inner end opposite a free tip end;
- said airfoil including a polymeric overcoat on at least one of the leading edge, trailing edge, first side and second side, and each airfoil section including an abrasive tip at said free tip end, and
- a seal circumscribing the plurality of circumferentially spaced rotatable blades, said seal comprising an organic matrix composite comprising an additive comprising of a metal stearate and an organic component, said additive configured to prevent adhesion of said organic component onto said abrasive tip, said seal configured contactable with, and abradable by, said abrasive tip.
3 more elements
A rotor system comprising:
- a plurality of circumferentially-spaced rotary blades, each of said blades comprising an airfoil section extending between leading and trailing edges, first and second opposed sides each joining the leading and trailing edges and an inner end opposite a free tip end;
- said airfoil including a polymeric overcoat on at least one of the leading edge, trailing edge, first side and second side, and each airfoil section including an abrasive tip at said free tip end, and
- a seal circumscribing the plurality of circumferentially spaced rotatable blades, said seal comprising an organic matrix composite comprising an additive comprising a metal stearate and an organic component, said additive configured to prevent adhesion of said organic component onto said abrasive tip, said seal configured contactable with, and abradable by, said abrasive tip.
Dependencies are inferred from the claim text.