The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 01, 2014
Filed:
Sep. 29, 2010
Rabiye Bekyigit, Wald-Michelbach, DE;
Philipp Brunner, Baden, CH;
Jian Chen, Brugg, CH;
Rolf Dobler, Schriesheim, DE;
Jozo Drmic, Nussabaumen, CH;
Andreas Ehrsam, Baden, CH;
Maurus Herzog, Schinznach-Dorf, CH;
Davor Kriz, Baden, CH;
Thomas Mokulys, Wurenlingen, CH;
Martin Reigl, Ehrendingen, CH;
Luca Ripamonti, Rieden, CH;
Thomas Schreier, Neuenhof, CH;
Giorgio Zanazzi, Baden, CH;
Rabiye Bekyigit, Wald-Michelbach, DE;
Philipp Brunner, Baden, CH;
Jian Chen, Brugg, CH;
Rolf Dobler, Schriesheim, DE;
Jozo Drmic, Nussabaumen, CH;
Andreas Ehrsam, Baden, CH;
Maurus Herzog, Schinznach-Dorf, CH;
Davor Kriz, Baden, CH;
Thomas Mokulys, Wurenlingen, CH;
Martin Reigl, Ehrendingen, CH;
Luca Ripamonti, Rieden, CH;
Thomas Schreier, Neuenhof, CH;
Giorgio Zanazzi, Baden, CH;
Alstom Technology Ltd., Baden, CH;
Abstract
A steam turbine is provided having a relief groove which is arranged in the region of the equalizing piston and extends in the circumferential direction of the rotor. The relief groove, with regard to an inlet passage, is arranged in the axial upstream direction so that it is arranged on the rotor outside a region in which the steam flow enters the bladed flow path via the inlet passage. The relief groove, with regard to the first blade row, is arranged in a region in which the greatest thermal stresses can arise in the rotor. As an option, the relief groove has a cover for reducing vortex flows, and also devices for reducing heating of the groove or devices for active cooling. The steam turbine allows an increased number of risk-free running up and running down operations of the steam turbine with minimum detriment to the turbine performance.