# US 2013/0156600 A1 · Components with microchannel cooling > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0156600 A1 - Document ID: US20130156600A1 - Status: Published application - Kind: A1 - Application number: 13/326,540 - Filed: 2011-12-15 - Published: 2013-06-20 - Earliest claimed: 2011-12-15 - Assignees: General Electric Company - Inventors: Ronald Scott Bunker - Web page: https://patentgrep.com/patent/US20130156600A1 ## CPC - F01D 5/186: {Film cooling (F01D5/187 takes precedence)} - F01D 5/20: Specially-shaped blade tips to seal space between tips and stator {(F01D5/225 takes precedence)} - F01D 5/288: {Protective coatings for blades} - Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A component includes a substrate having an outer surface, an inner surface and a tip. The inner surface defines at least one hollow, interior space. The outer surface defines one or more grooves, where each groove extends at least partially along the outer surface of the substrate and has a base. The component further includes a coating disposed over at least a portion of the outer surface of the substrate. The coating includes at least a structural coating that extends over the groove(s), such that the groove(s) and the structural coating together define one or more channels for cooling the component. The tip comprises a tip cap enclosing the hollow, interior space(s), and a tip rim disposed at a radially outer end of the substrate. The tip rim at least partially defines at least one discharge channel in fluid communication with at least one cooling channel. ## Claims ### Claim 1 A component comprising: a substrate comprising an outer surface, an inner surface and a tip, wherein the inner surface defines at least one hollow, interior space, wherein the outer surface defines one or more grooves, and wherein each groove extends at least partially along the outer surface of the substrate and has a base; and a coating disposed over at least a portion of the outer surface of the substrate, wherein the coating comprises at least a structural coating, wherein the structural coating extends over the one or more grooves, such that the one or more grooves and the structural coating together define one or more channels for cooling the component, wherein the tip comprises: a tip cap enclosing the at least one hollow, interior space, and a tip rim disposed at a radially outer end of the substrate, wherein the tip rim at least partially defines at least one discharge channel that is in fluid communication with at least one cooling channel. ### Claim 2 (depends on 1) The component of claim 1, wherein the component comprises a turbine airfoil, and wherein each hollow, interior space comprises a respective segment of at least one flow channel. ### Claim 3 (depends on 1) The component of claim 1, wherein the substrate further defines at least one access channel that extends between and provides fluid communication between a respective hollow, interior space and at least one cooling channel, wherein the respective access channel intersects the base of the respective cooling channel. ### Claim 4 (depends on 3) The component of claim 3, wherein each discharge channel intersects the respective cooling channel. ### Claim 5 (depends on 1) The component of claim 1, wherein the substrate defines a pressure sidewall and a suction sidewall, wherein the pressure and suction sidewalls are joined together at a leading edge and at a trailing edge of the component and extend from a root of the component to the tip of the component, wherein the channels extend at least partially along at least one of the pressure and suction sidewalls. ### Claim 6 (depends on 1) The component of claim 1, wherein each cooling channel extends at least partially along the tip cap. ### Claim 7 (depends on 6) The component of claim 6, wherein the tip cap defines at least one access channel that extends between and provides fluid communication between at least one hollow, interior space and at least one cooling channel, wherein the respective access channel intersects the base of the respective cooling channel. ### Claim 8 (depends on 1) The component of claim 1, wherein each groove has an opening, and wherein each groove narrows at the opening of the groove and thus comprises a re-entrant shaped groove, such that each cooling channel comprises a re-entrant shaped cooling channel. ### Claim 9 (depends on 1) The component of claim 1, wherein the structural coating defines one or more permeable slots, such that the structural coating does not completely bridge each groove. ### Claim 10 (depends on 1) The component of claim 1, wherein the structural coating seals each groove. ### Claim 11 A component comprising: a substrate comprising an outer surface, an inner surface and a tip, wherein the inner surface defines at least one hollow, interior space, wherein the tip comprises a tip cap enclosing the at least one hollow, interior space, wherein the outer surface defines one or more grooves, and wherein each groove extends at least partially along an outer surface of the tip cap and has a base; and a coating disposed over at least a portion of the outer surface of the substrate, wherein the coating comprises at least a structural coating, wherein the structural coating extends over the one or more grooves, such that the one or more grooves and the structural coating together define one or more channels for cooling the component, wherein the tip comprises a tip cap enclosing the at least one hollow, interior space, and wherein each cooling channel extends at least partially along the tip cap. ### Claim 12 (depends on 11) The component of claim 11, wherein the tip cap defines at least one access channel that extends between and provides fluid communication between at least one hollow, interior space and at least one cooling channel, wherein the respective access channel intersects the base of the respective cooling channel. ### Claim 13 (depends on 12) The component of claim 12, wherein the tip further comprises a tip rim disposed at a radially outer end of the substrate, wherein the substrate defines at least one discharge channel that extends below the tip rim and is in fluid communication with at least one cooling channel. ### Claim 14 (depends on 11) The component of claim 11, wherein the substrate defines a pressure sidewall and a suction sidewall, wherein the pressure and suction sidewalls are joined together at a leading edge and at a trailing edge of the component and extend from a root of the component to the tip of the component, wherein the tip cap has a sloped radially outer end, and wherein the tip cap defines at least one discharge hole that extends between a respective cooling channel and one of the pressure or suction sidewalls. ### Claim 15 (depends on 11) The component of claim 11, wherein each groove has an opening, and wherein each groove narrows at the opening of the groove and thus comprises a re-entrant shaped, such that each cooling channel comprises a re-entrant shaped cooling channel. ### Claim 16 (depends on 11) The component of claim 11, wherein the structural coating defines one or more permeable slots, such that the structural coating does not completely bridge each groove. ### Claim 17 (depends on 11) The component of claim 11, wherein the structural coating seals each groove. ### Claim 18 A component comprising: a substrate comprising an outer surface, an inner surface and a tip, wherein the inner surface defines at least one hollow, interior space, wherein the outer surface defines one or more grooves, and wherein each groove extends at least partially along the outer surface of the substrate and has a base; and a coating disposed over at least a portion of the outer surface of the substrate, wherein the coating comprises at least a structural coating, wherein the structural coating extends over the one or more grooves, such that the one or more grooves and the structural coating together define one or more channels for cooling the component, wherein the tip comprises: a tip cap enclosing the at least one hollow, interior space, and a tip rim disposed at a radially outer end of the substrate, wherein each cooling channel extends at least partially along the tip rim. ### Claim 19 (depends on 18) The component of claim 18, wherein each cooling channel extends along the length of the tip rim. ### Claim 20 (depends on 18) The component of claim 18, wherein each cooling channel extends only partially along the length of the tip rim. ### Claim 21 (depends on 18) The component of claim 18, wherein each groove has an opening, and wherein each groove narrows at the opening of the groove and thus comprises a re-entrant shaped groove, such that each cooling channel comprises a re-entrant shaped cooling channel. ### Claim 22 (depends on 18) The component of claim 18, wherein the structural coating defines one or more permeable slots, such that the structural coating does not completely bridge each groove. ### Claim 23 (depends on 18) The component of claim 18, wherein the structural coating seals each groove. ### Claim 24 (depends on 18) The component of claim 18, wherein the component comprises a turbine airfoil, and wherein each hollow, interior space comprises a respective segment of at least one flow channel. ### Claim 25 (depends on 18) The component of claim 18, wherein the substrate further defines at least one access channel that extends between and provides fluid communication between a respective hollow, interior space and at least one cooling channel, wherein the respective access channel intersects the base of the respective cooling channel. ### Claim 26 A component comprising: a substrate comprising an outer surface, an inner surface and a tip, wherein the inner surface defines at least one hollow, interior space, wherein the outer surface defines one or more grooves, and wherein each groove extends at least partially along the outer surface of the substrate and has a base; and a coating disposed over at least a portion of the outer surface of the substrate, wherein the coating comprises at least a structural coating, wherein the structural coating extends over the one or more grooves, such that the one or more grooves and the structural coating together define one or more channels for cooling the component, wherein the tip comprises: a tip cap enclosing the at least one hollow, interior space, and a tip rim disposed at a radially outer end of the substrate and having a tip shelf, wherein the substrate defines a pressure sidewall and a suction sidewall, wherein the pressure and suction sidewalls are joined together at a leading edge and at a trailing edge of the component and extend from a root of the component to the tip of the component, wherein at least one channel extends at least partially along the pressure sidewall and intersects the tip shelf. ### Claim 27 (depends on 26) The component of claim 26, wherein each groove has an opening, and wherein each groove narrows at the opening of the groove and thus comprises a re-entrant shaped, such that each cooling channel comprises a re-entrant shaped cooling channel. ### Claim 28 (depends on 26) The component of claim 26, wherein the structural coating defines one or more permeable slots, such that the structural coating does not completely bridge each groove. ### Claim 29 (depends on 26) The component of claim 26, wherein the structural coating seals each groove. ### Claim 30 (depends on 26) The component of claim 26, wherein the component comprises a turbine airfoil, and wherein each hollow, interior space comprises a respective segment of at least one flow channel. ### Claim 31 (depends on 26) The component of claim 26, wherein the substrate further defines at least one access channel that extends between and provides fluid communication between a respective hollow, interior space and at least one cooling channel, wherein the respective access channel intersects the base of the respective cooling channel.