Turbine blade with recessed squealer tip and shelf
Patent 6991430 Issued on January 31, 2006. Estimated Expiration Date: 
April 7, 2023. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 7, 2023. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesTip cooled blade Twin rib turbine blade Cool tip blade Patent #: 6164914 InventorsApplicationNo. 10408293 filed on 04/07/2003US Classes:416/97R, Flow exhausted to working fluid415/115, WITH PASSAGE IN BLADE, VANE, SHAFT OR ROTARY DISTRIBUTOR COMMUNICATING WITH WORKING FLUID415/173.1, Between blade edge and static part416/92, Discharge solely at periphery normal to rotation axis416/228Tined or irregular peripheryExaminersPrimary: Lazo, Thomas E.Assistant: White, Dwayne J. Attorney, Agent or FirmInternational ClassF01D 5/18AbstractA turbine blade squealer tip has a continuous squealer tip wall extending radially outwardly from and continuously around a tip cap. A recessed tip wall portion of the tip wall is recessed inboard from a pressure side of an airfoil outer wall of an airfoil of the blade forming a tip shelf therebetween. A plurality of film cooling shelf holes are disposed through the tip shelf to an internal cooling circuit of the blade and are spaced away from a junction between the recessed tip wall portion and the tip shelf. The exemplary embodiment of the airfoil includes shelf hole centerlines of the holes passing through pierce points in the shelf. At least a majority of the shelf hole centerlines are angled in outboard directions away from and outboard of the squealer tip wall. A majority of centerlines are angled away from vertical lines passing through the pierce points at first component angles in a range between 2 degrees and 16 degrees.Field of SearchWITH PASSAGE IN BLADE, VANE, SHAFT OR ROTARY DISTRIBUTOR COMMUNICATING WITH WORKING FLUIDWITH DIVERSELY ORIENTED INLET OR ADDITIONAL INLET FOR DIVERSE FLUID (E.G., HEATING, COOLING OR MIXED WORKING FLUID, ETC.) Between blade edge and static part Changing state mass within or fluid flow through working member or carrier Flow exhausted to working fluid Tined or irregular periphery Discharge solely at periphery normal to rotation axis | |
