Device for transferring fluid between two successive stages of a multistage centrifugal turbomachine
US6220816A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1998 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Dec 18, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2250/70
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The fluid transfer device comprises a stator assembly incorporating a plurality of return channels which pick up the high speed fluid flow leaving a centrifugal impeller of one stage of the turbomachine for the purpose of rectifying, slowing down, and conveying said flow to the inlet of another centrifugal impeller of an adjacent stage of the turbomachine. Each return channel is constituted by a continuous shaped individual tubular element. A first continuous return channel is defined by a set of varying sections defined by parameters and extending normally to a mean line situated in a predefined plane (P.sub.1 P.sub.2 P.sub.3) containing the axis of the machine. The mean line has a rectilinear first portion, a curved second portion forming a circular arc of radius R.sub.co2, and a rectilinear third portion. The various return channels are identical and can be derived one from another by rotation about the axis of the turbomachine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.