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:
Dec. 01, 1992
Filed:
May. 13, 1991
Francois Detanne, Paris, FR;
GEC Alsthom SA, Paris, FR;
Abstract
A turbine stage comprising a set of fixed vanes (1) fixed to the stator (3) of the turbine and supporting a diaphragm, followed by a set of moving vanes (8) mounted on a disk (9) which is fixed to the rotor (6) of the turbine, the periphery of the set of moving vanes (8) having seals (10) constituted by a plurality of chambers (11). The disk (9) includes suction orifices (16) opening out into the space between the diaphragm (4) and the disk (9) and disposed in the vicinty of the peripheral portion of the disk (9). The suction orifices (15) are connected by ducts (17) passing through at least some of the moving vanes (8) to outlet orifices (18) which open out in the tips of the vanes (8) downstream from the seals (10) within a chamber (11) thereof. The disturbed flow at the roots of the fixed vanes (2) and the leakage flow between the diaphragm (4) and the rotor (6) are sucked into the orifices (16), thereby improving efficiency.