EP 3084230 A1 20161026 - AXIAL FLOW FAN WITH BLADES TWISTED ACCORDING TO A BLADE PITCH RATIO THAT DECREASES (QUASI) LINEARLY WITH THE RADIAL POSITION
Title (en)
AXIAL FLOW FAN WITH BLADES TWISTED ACCORDING TO A BLADE PITCH RATIO THAT DECREASES (QUASI) LINEARLY WITH THE RADIAL POSITION
Title (de)
AXIALLÜFTER MIT GEMÄSS EINEM MIT EINER RADIALEN POSITION (QUASI) LINEAR SINKENDEN SCHAUFELSPITZENVERHÄLTNIS VERDRILLTEN SCHAUFELN
Title (fr)
SOUFFLANTE À ÉCOULEMENT AXIAL À PALES TOURNÉS SELON UN RAPPORT DE PAS DE PALE QUI DIMINUE DE FAÇON (QUASI)LINÉAIRE AVEC LA POSITION RADIALE
Publication
Application
Priority
DK 2013050432 W 20131217
Abstract (en)
[origin: WO2015090318A1] An axial flow fan (1) is disclosed comprising a hub (3),an annular shroud (6) extending concentric with the axis (4) of the hub (3), and a plurality of fan blades (2) connected at a root end (11) to said hub (3) and having a free tip end (7) extending radially towards said shroud (6), wherein the blades (2) are designed so that the fan (1) when in operation at nominal operating conditions generates a fluid flow in the immediate vicinity after the blades (2) which comprises a core flow that substantially is a forced vortex flow where the tangential flow speed component (c2, u) is proportional with the radial distance (r) from the axis (4). Equations to define the chord angle θ of the blades (2) are provided.
IPC 8 full level
F04D 29/38 (2006.01); F04D 29/36 (2006.01)
CPC (source: EP US)
F04D 19/002 (2013.01 - US); F04D 29/36 (2013.01 - EP US); F04D 29/384 (2013.01 - EP US); F04D 29/386 (2013.01 - US); F04D 29/545 (2013.01 - US)
Citation (search report)
See references of WO 2015090318A1
Citation (examination)
- US 2004165986 A1 20040826 - PARKER DANNY S [US], et al
- WO 9513472 A1 19950518 - PENN VENTILATOR CO INC [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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2015090318 A1 20150625; EP 3084230 A1 20161026; US 2016319836 A1 20161103
DOCDB simple family (application)
DK 2013050432 W 20131217; EP 13811779 A 20131217; US 201315105458 A 20131217