Patent · US Expired

Rotor of a turbogenerator having direct gas cooling incorporating a two-stage flow cascade

US6426574B1 · kind B1 · utility

4Cited by

4References

9Claims

0Family size

Assignee

ALSTOM Holdings · FR

Inventors

Stephan Hess · Bad Säckingen, DE
Christoph Hirsch · Windisch, CH
Michael Jung · Frankfurt am Main, DE
Johann Schubert · Mägenwil, CH
Hans Zimmerman · Uster, CH

Key dates

Filing date	May 5, 2000
Grant date	Jul 30, 2002
Priority date	—
Expiry date	May 5, 2020

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04D29/384
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In an air-cooled electrical machine having reverse cooling in a closed cooling circuit, a two-stage blade cascade for the optimum incident flow of cooling air to the rotor (4) and the rotor winding (29) is provided between a rotor cap plate (22) and a rotor shaft (28). The first blade cascade stage (30b) in the direction of flow is a deceleration cascade having pressure-generating properties, and the following blade cascade stage (30a) in the direction of flow is a deceleration cascade having deflecting properties.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.