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:
Nov. 29, 2011
Filed:
May. 29, 2007
Romain Bayere, Berlin, DE;
Malte Blomeyer, Mülheim an der Ruhr, DE;
Christian Cornelius, Sprockhövel, DE;
Torsten Matthias, Mülheim an der Ruhr, DE;
Uwe Sieber, Mülheim an der Ruhr, DE;
Romain Bayere, Berlin, DE;
Malte Blomeyer, Mülheim an der Ruhr, DE;
Christian Cornelius, Sprockhövel, DE;
Torsten Matthias, Mülheim an der Ruhr, DE;
Uwe Sieber, Mülheim an der Ruhr, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
Disclosed is an annular flow duct for a turbomachine, the flow duct arranged concentrically about a machine axis running in the axial direction and defined by a boundary wall of circular cross section for directing a main flow, wherein the boundary wall has a plurality of return flow passages distributed over its circumference and through which in each case a partial flow is detached from the main flow at a bleed position and returned to the main flow at a feed position situated upstream of the bleed position, and having aerofoils, arranged radically in the flow duct, of a blade ring, the aerofoil tips of which lie opposite the boundary wall, with a gap formed in each case, wherein the aerofoils are movable in a predetermined rotation direction along the circumference of the boundary wall. Furthermore, a compressor which is insensitive to pumping and flow separations, as viewed in rotation direction, the bleed position of each return flow passage lies upstream of the corresponding feed position.