EP 3167195 B1 20180711 - RETURN CHANNEL OF A MULTISTAGE TURBOCOMPRESSOR OR TURBOEXPANDER WITH ROUGH WALL SURFACES
Title (en)
RETURN CHANNEL OF A MULTISTAGE TURBOCOMPRESSOR OR TURBOEXPANDER WITH ROUGH WALL SURFACES
Title (de)
RÜCKFÜHRSTUFE EINES MEHRSTUFIGEN TURBOVERDICHTERS ODER TURBOEXPANDERS MIT RAUEN WANDOBERFLÄCHEN
Title (fr)
CANAL DE RETOUR D'UN TURBOCOMPRESSEUR OU TURBODÉTENDEUR À PLUSIEURS ÉTAGES AVEC PAROIS RUGUEUSES
Publication
Application
Priority
- DE 102014219821 A 20140930
- EP 2015072208 W 20150928
Abstract (en)
[origin: WO2016050669A1] The invention relates to a return stage (RS) of a radial turbo fluid energy machine, in particular of a radial turbo compressor (TCO), having an axis of rotation (X), the return stage (RS) comprising an annular flow channel (CH) for feeding a flowing process fluid (PF) from a flow opening of a first impeller (IMP1) to a flow opening of a second impeller (IMP2) arranged downstream. In order to increase efficiency, the flow channel (CH) according to the invention is defined by bounding surface areas (SFA), of which at least one certain rough area extending in the circumferential direction has a surface roughness (RZ) that is increased in relation to the other areas.
IPC 8 full level
F04D 17/12 (2006.01); F01D 5/14 (2006.01); F04D 29/44 (2006.01); F04D 29/68 (2006.01)
CPC (source: CN EP RU US)
F01D 9/045 (2013.01 - EP US); F04D 17/12 (2013.01 - RU); F04D 17/122 (2013.01 - CN EP US); F04D 29/444 (2013.01 - CN EP US); F04D 29/681 (2013.01 - CN EP US); F05D 2220/40 (2013.01 - US); F05D 2250/63 (2013.01 - EP US); F05D 2300/516 (2013.01 - CN EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
DE 102014219821 A1 20160331; CN 107076159 A 20170818; EP 3167195 A1 20170517; EP 3167195 B1 20180711; RU 2661916 C1 20180723; US 2017292536 A1 20171012; WO 2016050669 A1 20160407
DOCDB simple family (application)
DE 102014219821 A 20140930; CN 201580052792 A 20150928; EP 15774561 A 20150928; EP 2015072208 W 20150928; RU 2017114608 A 20150928; US 201515512766 A 20150928