Rotor disk and rotor assembly

Abstract

The disclosure generally relates to rotor disks and rotor assemblies having a composite lubricated sheet adhered thereon and having improved tribological properties at high temperatures.

What is claimed is: 
     
         1 . A rotor disk comprising a composite lubricating sheet adhered to at least one rotor disk fan blade slot, wherein the composite lubricating sheet comprises:
 a fabric at least partially embedded with a resin, the fabric including an aromatic polyamide yarn, and a mixed yarn having the aromatic polyamide yarn and a low-friction yarn; and   a metallic layer adhered to one side of the fabric.   
     
     
         2 . The rotor disk according to  claim 1 , wherein the resin is phenol-formaldehyde resin. 
     
     
         3 . The rotor disk according to  claim 1 , wherein the aromatic polyamide yarn is selected from the group consisting of poly(para-phenylene terephthalamide), poly(meta-phenylene terephthalamide), poly(meta-phenylene isophthalamide), poly(para-phenylene isophthalamide), combinations thereof, and copolymers thereof. 
     
     
         4 . The rotor disk according to  claim 1 , wherein the low-friction yarn comprises graphite fiber or a fluoropolymer fiber. 
     
     
         5 . The rotor disk according to  claim 8 , wherein the fluoropolymer fiber comprises a polytetrafluoroethylene. 
     
     
         6 . The rotor disk according to  claim 1 , wherein the metallic layer is a metal selected from the group consisting of titanium, aluminum, steel, and nickel. 
     
     
         7 . The rotor disk according to  claim 6 , wherein the metallic layer is titanium. 
     
     
         8 . The rotor disk according to  claim 1 , wherein the metallic layer has a Vickers Hardness of approximately 30 HV or greater at a load of approximately 100 grams applied for approximately 20 seconds according to ASTM E-384. 
     
     
         9 . The rotor disk according to  claim 1 , wherein the composite lubricating sheet has a Compression Fraction in a range of 0.1% to approximately 20% with a pressure applied by compressing at approximately 127 microns/minute up to approximately 450 MPa and then released. 
     
     
         10 . The rotor disk according to  claim 1 , wherein the composite lubricating sheet additionally comprises an attaching layer between the fabric and the metallic layer, attaching layer comprising an adhesive selected from the group consisting of a thermoplastic adhesive or a thermoset adhesive. 
     
     
         11 . A rotor assembly comprising:
 a rotor disk having fan blade slots;   fan blades secured in the fan blade slots by fan blade roots; and   a composite lubricating sheet adhered to at least one rotor disk fan blade slot, wherein the composite lubricating sheet comprises:
 a fabric at least partially embedded with a resin, the fabric including an aromatic polyamide yarn, and a mixed yarn having the aromatic polyamide yarn and a low-friction yarn; and 
 a metallic layer adhered to one side of the fabric. 
   
     
     
         12 . The rotor assembly according to  claim 11 , wherein the resin is phenol-formaldehyde resin. 
     
     
         13 . The rotor assembly according to  claim 11 , wherein the aromatic polyamide yarn is selected from the group consisting of poly(para-phenylene terephthalamide), poly(meta-phenylene terephthalamide), poly(meta-phenylene isophthalamide), poly(para-phenylene isophthalamide), combinations thereof, and copolymers thereof. 
     
     
         14 . The rotor assembly according to  claim 11 , wherein the low-friction yarn comprises graphite fiber or a fluoropolymer fiber. 
     
     
         15 . The rotor assembly according to  claim 14 , wherein the fluoropolymer fiber comprises a polytetrafluoroethylene. 
     
     
         16 . The rotor assembly according to  claim 11 , wherein the metallic layer is a metal selected from the group consisting of titanium, aluminum, steel, and nickel. 
     
     
         17 . The rotor assembly according to  claim 16 , wherein the metallic layer is titanium. 
     
     
         18 . The rotor assembly according to  claim 11 , wherein the metallic layer has a Vickers Hardness of approximately 30 HV or greater at a load of approximately 100 grams applied for approximately 20 seconds according to ASTM E-384. 
     
     
         19 . The rotor assembly according to  claim 11 , wherein the composite lubricating sheet has a Compression Fraction in a range of 0.1% to approximately 20% with a pressure applied by compressing at approximately 127 microns/minute up to approximately 450 MPa and then released. 
     
     
         20 . The rotor assembly according to  claim 11 , wherein the composite lubricating sheet additionally comprises an attaching layer between the fabric and the metallic layer, attaching layer comprising an adhesive selected from the group consisting of a thermoplastic adhesive or a thermoset adhesive.