Turbine nozzle and related casting method for optimal fillet wall thickness control
US5713722A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1996 |
| Grant date | Feb 3, 1998 |
| Priority date | — |
| Expiry date | Jun 20, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C9/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In a method of investment casting a turbine nozzle which includes an outer band, an inner band and an airfoil section extending between the inner and outer bands, an improvement including shaping a temporary wax form, and external shell and internal core components used in casting such that during pouring of molten metal into a space created by removal of the wax form, shell material lies on opposite sides of an outer fillet connecting the outer band to the airfoil section. The resulting gas turbine nozzle includes first and second horizontally oriented ribs extending about interior peripheries of the airfoil section vertically adjacent the outer and inner band fillets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.