EP 1990545 A4 20140312 - RADIAL- FLOW IMPELLER (VARIANTS), A BLADE THEREFOR AND A TUBE AXIAL FAN PROVIDED THEREWITH
Title (en)
RADIAL- FLOW IMPELLER (VARIANTS), A BLADE THEREFOR AND A TUBE AXIAL FAN PROVIDED THEREWITH
Title (de)
RADIALLÜFTERRAD (VARIANTEN), SCHAUFEL DAFÜR UND DAMIT AUSGESTATTETER ROHRVENTILATOR
Title (fr)
ROUE DE TRAVAIL RADIALE (ET VARIANTE), PALE DESTINÉE À CETTE ROUE ET VENTILATEUR À CANAL DOTÉ DE CETTE ROUE DE TRAVAIL
Publication
Application
Priority
- RU 2007000061 W 20070207
- RU 2006103511 A 20060208
- RU 2007102815 A 20070125
Abstract (en)
[origin: WO2007091923A1] The group of inventions relates to a radial-flow impeller (and to a variant thereof) for low-noise fans and compressors, to a blade for said impeller and to a tube axial fan provided therewith. The inventive radial-flow impeller comprises front (1) and main discs. The blades (3) of the radial-flow impeller are located between the discs, embodied in the form of backward-curved blades and are provided with a main section (7) and a leading edge flap (10). The side edge of the leading edge flap is arranged at a sharp angle with respect to the front edge thereof and points corresponding to the impeller axis and to the leading edge (13) of the flap and junction points (14) for connecting to the front edge disc of the next blade lie in the plane projection perpendicular to the impeller axis along a straight line. The sum of sound pressure signals upstream of the impeller tends to zero.
IPC 8 full level
F04D 17/12 (2006.01); F04D 29/28 (2006.01); F04D 29/30 (2006.01); F04D 29/66 (2006.01)
CPC (source: EP)
F04D 17/12 (2013.01); F04D 29/281 (2013.01); F04D 29/30 (2013.01); F04D 29/666 (2013.01)
Citation (search report)
- [A] US 3260443 A 19660712 - GARNETT EDWARD V, et al
- See references of WO 2007091923A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1990545 A1 20081112; EP 1990545 A4 20140312; WO 2007091923 A1 20070816
DOCDB simple family (application)
EP 07747807 A 20070207; RU 2007000061 W 20070207