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US 10,670,045 B2Granted
Abrasive blade tips with additive layer resistant to clogging
AssigneeRaytheon Technologies Corporation
InventorsChristopher W Strock, James O Hansen
Life of this patent
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Abstract
An abrasive tip comprises an additive layer having an additive; the additive is configured to prevent adhesion of an organic component from an abradable seal onto an abrasive blade tip.
Claims18
An abrasive blade tip comprising:
- an additive coating, wherein said additive coating comprises an additive consisting of magnesium stearate, said additive coating configured to prevent adhesion of an organic component of an abradable seal onto the abrasive blade tip.
A gas turbine engine 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, said abrasive tip comprising an additive layer, said additive layer comprising an additive, wherein said additive is magnesium stearate;
- and
- a seal circumscribing the plurality of circumferentially spaced rotatable blades, said seal comprising an organic matrix composite 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.
4 more elements
A fan 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, said abrasive tip including an additive layer comprising an additive wherein said additive is magnesium stearate, and
- a seal circumscribing the plurality of circumferentially spaced rotatable blades, said seal comprising an organic matrix composite comprising 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.
A process of applying an additive coating to a blade tip comprising:
- providing a blade having 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;
- coating said free tip end with a metal matrix having hard particles;
- dispersing said hard particles throughout said metal matrix;
- preconditioning said metal matrix wherein said hard particles are exposed above said metal matrix;
- coating said metal matrix with an additive layer, said additive layer comprising an additive comprising an additive consisting of magnesium stearate;
- and
- covering spaces between said hard particles with said additive layer.
4 more elements
Dependencies are inferred from the claim text.