Stiffness controlled abradeable seal system with max phase materials and methods of making same
AssigneeUnited Technologies Corporation
InventorsDmitri Novikov, David Ulrich Furrer, Sergei F Burlatsky
Life of this patent
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Abstract
A stiffness controlled abradeable seal system for a gas turbine engine includes a cantilevered arm that supports one of a rotating seal surface and a static seal surface, a stiffness of the cantilevered arm controlled to achieve a desired operational temperature at a seal interface.
Claims12
A stiffness controlled abradeable seal system for a gas turbine engine, comprising:
- a static seal surface in contact with a rotating seal surface at a seal interface;
- and a cantilevered arm that supports one of said rotating seal surface and said static seal surface, a stiffness of said cantilevered arm determined to achieve a desired operational temperature that is maintained within a desired temperature range at said seal interface during operation of the gas turbine engine, wherein said seal interface is an abradeable seal interface that includes a solid lubricant material comprising at least one metal combined with at least one member of a class of ternary compounds,
- wherein said at least one metal combined with said at least one member of a class of ternary compounds is defined by the general composition M.sub.n+1AX.sub.n, wherein M is an early transition metal selected from groups IIIB, IVB, VB, and VIB, A is an element selected from groups IIIA, IVA, VA, VIA, and VIIA, X is either carbon or nitrogen, and n is an integer between 1 and 3, and
- wherein said seal interface includes an about 25% volume fraction of said at least one metal to minimize friction coefficient.
A method for manufacturing a seal interface within a stiffness controlled abradeable seal system, comprising:
- determining a stiffness of a cantilevered arm via material selection that supports one of a rotating seal surface and a static seal surface that form a seal interface to achieve a desired operational temperature at the seal interface, wherein said seal interface is an abradeable seal interface that includes a solid lubricant material;
- determining a wear coefficient at the seal interface prior to determining the stiffness;
- and controlling a volume fraction of solid lubricant material to about 25% volume fraction comprising at least one metal combined with at least one member of a class of ternary compounds to control the wear coefficient via the solid lubricant material.
A component seal interface within a stiffness controlled abradeable seal system for a gas turbine engine, comprising:
- a solid lubricant material, said solid lubricant material includes comprising an about at least 25% volume fraction of at least one metal combined with at least one member of a class of ternary compounds defined by the general composition M.sub.n+1AX.sub.n, wherein M is an early transition metal selected from groups IIIB, IVB, VB, and VIB, A is an element selected from groups IIIA, IVA, VA, VIA, and VIIA, X is either carbon or nitrogen, and n is an integer between 1 and 3, to minimize friction coefficient.
Dependencies are inferred from the claim text.