EP 3196477 A4 20180502 - CENTRIFUGAL IMPELLER AND CENTRIFUGAL COMPRESSOR
Title (en)
CENTRIFUGAL IMPELLER AND CENTRIFUGAL COMPRESSOR
Title (de)
RADIALIMPELLER UND RADIALVERDICHTER
Title (fr)
HÉLICE CENTRIFUGE ET COMPRESSEUR CENTRIFUGE
Publication
Application
Priority
- JP 2014190468 A 20140918
- JP 2015059344 W 20150326
Abstract (en)
[origin: EP3196477A1] A centrifugal impeller capable of suppressing the development of a boundary layer and thus fulfilling its performance sufficiently, and a centrifugal compressor are provided. The impeller includes a hub 20, a shroud 21, and a plurality of blades 22 disposed between the hub 20 and the shroud 21 and blows out fluid in a radial direction by the rotation of a rotary shaft fixed to the hub 20. When an angle made by a projection line 33 that is obtained by projecting a camber line 32 of the blade 22 onto a predetermined meridional cross section and the camber line 32 is defined as an inclination angle ³¸ and an inclination in a direction opposite to a rotating direction of the rotary shaft is defined to be positive, the blade 22 is formed in such a manner that the inclination angle ³¸ of a leading edge 22A is zero or positive on the hub 20 side and gradually increasing toward the shroud 21 and the inclination angle is gradually decreasing from the leading edge toward a trailing edge in a flow direction of the fluid.
IPC 8 full level
F04D 29/30 (2006.01); F04D 29/28 (2006.01); F04D 29/68 (2006.01)
CPC (source: EP US)
F04D 29/284 (2013.01 - EP US); F04D 29/30 (2013.01 - EP US); F04D 29/4206 (2013.01 - US); F04D 29/681 (2013.01 - EP US); F05D 2240/303 (2013.01 - EP US); F05D 2240/304 (2013.01 - EP US); F05D 2250/70 (2013.01 - EP US)
Citation (search report)
- [E] EP 2942531 A1 20151111 - ZIEHL ABEGG SE [DE]
- [X] US 2007258822 A1 20071108 - SPAGGIARI ALESSANDRO [IT]
- [A] JP 2013024057 A 20130204 - DAIKIN IND LTD
- [A] US 2471174 A 19490524 - TRUMPLER WILLIAM E
- [A] US 3363832 A 19680116 - GROFF GERALD C
- See references of WO 2016042818A1
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)
EP 3196477 A1 20170726; EP 3196477 A4 20180502; CN 106662117 A 20170510; JP 2016061241 A 20160425; US 2017260998 A1 20170914; WO 2016042818 A1 20160324
DOCDB simple family (application)
EP 15841417 A 20150326; CN 201580043392 A 20150326; JP 2014190468 A 20140918; JP 2015059344 W 20150326; US 201515503806 A 20150326