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. 24, 2001
Filed:
Dec. 18, 1998
Device for transferring fluid between two successive stages of a multistage centrifugal turbomachine
Jean-Michel Nguyen Duc, Vezillon, FR;
Philippe Geai, Aubevoye, FR;
Jean-Marie Duchemin, Sainte Consorce, FR;
Abstract
The fluid transfer device comprises a stator assembly incorporating a plurality of return channels which pick up the high speed fluid flow leaving a centrifugal impeller of one stage of the turbomachine for the purpose of rectifying, slowing down, and conveying said flow to the inlet of another centrifugal impeller of an adjacent stage of the turbomachine. Each return channel is constituted by a continuous shaped individual tubular element. A first continuous return channel is defined by a set of varying sections defined by parameters and extending normally to a mean line situated in a predefined plane (P,P,P,) containing the axis of the machine. The mean line has a rectilinear first portion, a curved second portion forming a circular arc of radius R,, and a rectilinear third portion. The various return channels are identical and can be derived one from another by rotation about the axis of the turbomachine.