US 11,898,543 B2
High efficiency turbine impeller
Giancarlo Alfonsi, Milan (IT); and Agostino Lauria, Montalto Uffugo (IT)
Assigned to UNIVERSITA' DELLA CALABRIA, Rende (IT); and OFFICINE MECCANICHE ZEMA, Casale Litta (IT)
Appl. No. 17/780,091
Filed by UNIVERSITA' DELLA CALABRIA, Rende (IT); and OFFICINE MECCANICHE ZEMA, Casale Litta (IT)
PCT Filed Nov. 17, 2020, PCT No. PCT/IB2020/060821
§ 371(c)(1), (2) Date May 26, 2022,
PCT Pub. No. WO2021/111226, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. 102019000022923 (IT), filed on Dec. 4, 2019.
Prior Publication US 2022/0412314 A1, Dec. 29, 2022
Int. Cl. F03D 9/37 (2016.01); F03D 3/06 (2006.01); F03D 3/00 (2006.01)
CPC F03D 9/37 (2016.05) [F03D 3/005 (2013.01); F03D 3/062 (2013.01); F05B 2240/131 (2013.01); F05B 2240/912 (2013.01); F05B 2250/323 (2013.01); F05B 2250/5011 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A turbine impeller configured to be driven by a fluid flow, having:
an axis of rotation, and
a plurality of constituent elements arranged around said axis of rotation,
wherein each constituent element of said plurality of constituent elements comprises:
an internal portion comprising a first opening and a second opening placed at two different heights with respect to said axis of rotation and connected by a chamber configured to be run through by the fluid flow, said chamber having an extension development in axial direction and converging towards said axis of rotation;
a first middle portion fluidically connected to said first opening, and a second middle portion fluidically connected to said second opening, said first and said second middle portions being configured to deflect the fluid flow from a radial direction to a direction at an angle (a) from said radial direction on a plane perpendicular to said axis of rotation; and
a first external portion fluidically connected to said first middle portion, and a second external portion fluidically connected to said second middle portion, said first and second external portions being convergent respectively towards said first and second middle portions;
and wherein only said first and said second middle portions include each one or more internal airfoils configured to deflect the fluid flow from said radial direction to said direction at the angle (α) and to increase a rotational force generated by the interaction between the fluid flow and the plurality of constituent elements of the turbine impeller.