FAN FOR FURNACES AND METHOD FOR MANUFACTURING THE SPECIFIED FAN Russian patent published in 2021 - IPC F04D29/28 F23L5/02 F24C15/32 

FIELD: industrial fans.

SUBSTANCE: group of inventions relates to furnaces and fans for furnaces. Fan (1) for furnaces contains: support plate (5) perpendicular to rotation axis (X) and equipped with first surface (6) limiting rear side (3) of fan (1), and second surface (7) directed to front side (2). Several blades (8) are attached with protrusion to second surface (7) of support plate (5) and located around axis (X). Each blade (8) is equipped with rear edge (15) attached to second surface (7) of support plate (5), outer edge (17) located at peripheral side (4) of fan (1); inner edge (16) placed for connection between rear edge (15) and outer edge (17) and facing front side (2) of fan (1). Ring (9) is attached to blades (8), it passes around axis (X), and it is equipped with third surface (11) directed to rear side (3), and fourth surface (12) directed to front side (2), and is installed in a position that is essentially intermediate between inner edge (16) and support plate (5). Outer edge (17) is equipped with cutout (18) that is open on peripheral side (4) and on rear side (3), and ring (9) is fixed in this cutout (18). Cutouts (18) determine interference-free zone (130) passing between rear side (3) and third surface (11) of ring (9).

EFFECT: ensuring the effective operation of the furnace due to the use of the structurally easy and reliable fan.

15 cl, 5 dwg