Single HP-MP internal stator for a steam turbine with controlled steam conditioning
US5149247A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1990 |
| Grant date | Sep 22, 1992 |
| Priority date | — |
| Expiry date | Apr 26, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01D25/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The HP-MP steam turbine body has a single internal stator surrounding both the HP and the MP portions of the rotor. The internal stator co-operates with the external stator to define axial positioning means for the internal stator and to define a thermal screen for an inter-stator space which is swept with steam taken from one of the last stages of the HP stream. The portions of the internal stator which surround all of the expansion of the HP stream and the hot stages of the MP stream are steam-conditioned in optimum manner, thereby making it possible to reduce the temperature gradient which the internal stator has to withstand, and also the temperature of the fastenings for both of the stators. The internal stator is simple in structure, the dimensioning of the HP-MP body is optimized, as are the fastenings, and the temperature control of the stators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.