Search International and National Patent Collections

1. (WO2018145838) RETURN STAGE OF A MULTI-STAGED COMPRESSOR OR EXPANDER WITH TWISTED GUIDE VANES

Pub. No.:    WO/2018/145838    International Application No.:    PCT/EP2018/050397
Publication Date: Fri Aug 17 01:59:59 CEST 2018 International Filing Date: Wed Jan 10 00:59:59 CET 2018
IPC: F04D 17/12
F04D 29/44
Applicants: SIEMENS AKTIENGESELLSCHAFT
Inventors: HERMES, Viktor
Title: RETURN STAGE OF A MULTI-STAGED COMPRESSOR OR EXPANDER WITH TWISTED GUIDE VANES
Abstract:
Return stage, radial turbomachine The invention relates to a return stage (RTC) through which a process fluid is designed to flow along a throughflow direction of a radial turbomachine (RTM), in particular a radial turbo compressor return stage (RCC), wherein the return stage (RTC) extends in annular fashion about an axis (X), wherein the return stage (RTC) is defined radially inwardly by an inner delimiting contour (IDC) and radially outwardly by an outer delimiting contour (ODC), wherein at least one guide vane stage (VST) comprising guide vanes (VNS) extends at least along a part of the third section (SG3) and segments the return stage in the circumferential direction into flow channels, wherein in each case a profile midline (PML) of a profile cross section (PRC) of the guide vanes (VNS) of the guide vane stage (VST) defines an inner track (ITR) on the side of the inner delimiting contour (IDC) and an outer track (OTR) on the side of the outer delimiting contour (ODC). The invention also relates to a radial turbomachine (RTM), in particular a radial turbo compressor (CO) having at least one such return stage. In order to improve the aerodynamics, it is proposed to make the guide vanes (VNS) essentially cylindrical in a central second profile section (PS2), and otherwise to make them three-dimensional.