Method of manufacturing a stator stage for a turbine pump
US6627837B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2002 |
| Grant date | Sep 30, 2003 |
| Priority date | — |
| Expiry date | Jun 4, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2230/10
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The method uses electrical discharge machining to form, onto a disc (8) belonging to a stator (11) of a turbine pump, radial blades (12) joined to the disc at both ends and separated by very narrow channels (13). To form the blades, a workpiece (2) is exposed to a tool (1) having a circular edge (4) whose radius corresponds with an external radius of the blades. The tool is provided along its edge with at least one tongue-shaped elongated member (5) joined at one end to the tool plate (3) and extending along said edge (4) in an inclined plane. Due to a relative combined rotation and translation motion between the tool and the workpiece, at least one channel (13) with shape, size and inclination corresponding with those of the tongue element (7) is produced in the workpiece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.