# US 9,039,375 B2 · Non-axisymmetric airfoil platform shaping > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,039,375 B2 - Document ID: US9039375B2 - Status: Granted - Kind: B2 - Application number: 12/551,741 - Filed: 2009-09-01 - Published: 2011-03-03 - Granted: 2015-05-26 - Earliest claimed: 2009-09-01 - Assignees: General Electric Company - Applicants: Andrew Ray Kneeland; Andres Jose Garcia-Crespo; Bradley T. Boyer; Thomas William Vandeputte; Sylvain Pierre - Inventors: Andrew Ray Kneeland; Andres Jose Garcia-Crespo; Bradley T. Boyer; Thomas William Vandeputte; Sylvain Pierre - Web page: https://patentgrep.com/patent/US9039375B2 ## CPC - F01D 5/141: {Shape, i.e. outer, aerodynamic form (F01D5/148 - F01D5/20 take precedence; blade construction F01D5/147)} - F01D 5/142: {of the blades of successive rotor or stator blade-rows} - F01D 5/143: {Contour of the outer or inner working fluid flow path wall, i.e. shroud or hub contour} - F01D 11/02: by non-contact sealings, e.g. of labyrinth type (for sealing space between rotor blade tips and stator F01D11/08) - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) ## Abstract Turbine blade assemblies of a turbine include airfoils that are mounted on bases. The leading and/or trailing edges of the bases are provided with curved portions. Likewise, curved portions may be provided on leading and/or trailing edges of the angle wings of a turbine blade assembly. Also, curved portions may be provided on the leading and/or trailing edges of nozzle assemblies of a turbine. ## Claims ### Claim 1 A blade assembly for a turbine, comprising: a mounting portion that is configured to be coupled to a rotating shaft of a turbine; a base that is formed on a top of the mounting portion, wherein a leading edge of the base includes at least one curved portion that extends forward from the leading edge of the base, the at least one curved portion extending along only a portion of the leading edge of the base, the base including: a leading angel wing formed on the leading side of the base, wherein at least one curved portion extends forward from a leading edge of the leading angel wing, the at least one curved portion extending along only a portion of the leading edge of the angel wing, wherein the at least one curved portions on the leading edge of the base and the leading edge of the leading angel wing have corresponding shapes, and wherein a location of the at least one curved portion on the leading edge of the leading angel wing is offset with respect to a location of the at least one curved portion on the leading edge of the base, and a trailing angel wing formed on the trailing side of the base; and a blade that extends upward from the top of the base. ### Claim 2 (depends on 1) The blade assembly of claim 1, wherein the at least one curved portion on the leading edge of the base is located adjacent a leading edge of the blade on the base. ### Claim 3 (depends on 1) The blade assembly of claim 1, wherein the at least one curved portion on the leading edge of the base is located to one side of a leading edge of the blade on the base. ### Claim 4 (depends on 3) The blade assembly of claim 3, wherein the at least one curved portion on the leading edge of the base is located to the side of the leading edge of the blade which is in the direction that the blade assembly will travel as it rotates in a turbine. ### Claim 5 (depends on 1) The blade assembly of claim 1, wherein the at least one curved portions comprise a plurality of curved portions. ### Claim 6 (depends on 1) The blade assembly of claim 1, wherein a trailing edge of the base includes at least one curved portion that extends rearward from the trailing edge of the base, the at least one curved portion extending along only a portion of the trailing edge of the base, and wherein the outer edge of the trailing angel wing includes at least one curved portion that extends rearward from the trailing edge of the trailing angel wing, the at least one curved portion extending along only a portion of the trailing edge of the trailing angel wing. ### Claim 7 (depends on 6) The blade assembly of claim 6, wherein the at least one curved portions on the trailing edge of the base and the trailing edge of the trailing angel wing have corresponding shapes. ### Claim 8 (depends on 7) The blade assembly of claim 7, wherein a location of the at least one curved portion on the trailing edge of the trailing angel wing is offset with respect to a location of the at least one curved portion on the trailing edge of the base. ### Claim 9 (depends on 1) A turbine comprising the blade assembly of claim 1. ### Claim 10 A stationary nozzle assembly for a turbine, comprising: a first mounting portion that is configured to be attached to an interior of a turbine casing; a nozzle blade having a first end attached to the first mounting portion; and a second mounting portion attached to a second end of the nozzle blade, wherein the second mounting portion comprises: a nozzle base having leading and trailing edges, wherein the leading edge of the nozzle base includes at least one curved portion that extends forward from the leading edge of the nozzle base, the at least one curved portion extending along only a portion of the leading edge of the nozzle base, and a leading angel wing, wherein at least one curved portion that extends forward is formed on a leading edge of the leading angel wing, the at least one curved portion extending along only a portion of the leading edge of the leading angel wing, wherein a shape of the at least one curved portion on the leading edge of the leading angel wing corresponds to a shape of the at least one curved portion on the leading edge of the nozzle base, and wherein a location of the at least one curved portion on the leading edge of the leading angel wing is offset with respect to a location of the at least one curved portion on the leading edge of the nozzle base. ### Claim 11 (depends on 10) The nozzle assembly of claim 10, wherein a trailing edge of the nozzle base also includes a at least one curved portion that extends rearward from the trailing edge of the nozzle base, and wherein the nozzle base further includes a trailing angel wing, wherein at least one curved portion that extends rearward is formed on a trailing edge of the trailing angel wing, and wherein a shape of the at least one curved portion on the trailing edge of the trailing angel wing corresponds to a shape of the at least one curved portion on the trailing edge of the nozzle base. ### Claim 12 (depends on 10) The nozzle assembly of claim 10, wherein the at least one curved portion on the leading edge of the nozzle base is located adjacent a leading edge of the nozzle blade on the nozzle base. ### Claim 13 (depends on 10) The nozzle assembly of claim 10, wherein the at least one curved portion on the leading edge of the nozzle base is located to one side of a leading edge of the nozzle blade on the nozzle base. ### Claim 14 (depends on 10) The nozzle assembly of claim 10, wherein the at least one curved portions on the leading edge of the nozzle base and the leading edge of the leading angel wing comprise a plurality of curved portions. ### Claim 15 (depends on 10) A turbine comprising the nozzle assembly of claim 10.