Method of manufacturing rotating thermal machine blading consisting of an airfoil, a root and a shroud plate or a shroud by fastening a shroud plate, and a blade manufactured by this method
US4820124A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 13, 1988 |
| Grant date | Apr 11, 1989 |
| Priority date | — |
| Expiry date | Apr 13, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B3/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Blading for a rotating thermal machine consists of an airfoil (1), a root (4) and a shroud plate (5) or a shroud, the tip (2) of the airfoil (1) having a spigot-type step (11) with a semi-circular groove (12) extending around the whole periphery of its generated surface. The shroud plate (5) or the shroud has a recess corresponding to the step (11) with a semi-circular groove (8) extending around the complete periphery. At least one piece of a firmly seated heat-resisting wire (10) is located in the circular duct formed by the grooves (8, 12) as the fastening element between the components (1, 5). The blading is manufactured by pushing and/or pulling the wire (10) sideways into the duct formed by the grooves (8, 12). Optimum material combination, particularly for highly loaded gas turbine blading, is possible by selecting an oxide-dispersion-hardened superalloy with longitudinally directed columnar crystals for the airfoil (1) and a non-oxide-dispersion-hardened cast or forged superalloy for the shroud plate (5) or the shroud.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.