Single-piece fan wheel

Abstract

The invention relates to a blower wheel (1) in a one-piece design having a bottom disk (12) and a cover disk (11) between which a blade ring is formed having multiple blower wheel blades (13) disposed in the circumferential direction at a spacing from one another, wherein the bottom disk (12) defines a maximum radial diameter da and the cover disk (11) forms an axial intake opening (25) having a diameter di, wherein the cover disk (11) extends radially outwards from the circumferential edge (14) which forms the intake opening (25) and has a maximum outer diameter dt, and wherein an outer diameter ratio dt/da is defined in a range from 0.6 to 0.8.

1 . A blower wheel in a one-piece design having a bottom disk and a cover disk between which a blade ring is formed having multiple blower wheel blades disposed in the circumferential direction at a spacing from one another, wherein the bottom disk defines a maximum radial diameter da and the cover disk forms an axial intake opening having a diameter di, wherein the cover disk extends radially outwards from the circumferential edge which forms the intake opening and has a maximum outer diameter dt, and wherein an outer diameter ratio dt/da is defined in a range from 0.6 to 0.8. 
     
     
         2 . The blower wheel according to  claim 1 , wherein the outer diameter ratio dt/da is set in a range from 0.66 to 0.77. 
     
     
         3 . The blower wheel according to  claim 1 , wherein the outer diameter ratio dt/da is set to a value of 0.69 or 0.74 with a respective maximum variation of ±0.03. 
     
     
         4 . The blower wheel according to  claim 1 , wherein the blower wheel blades start from the circumferential edge of the cover disk and extend radially outwards, and the axial front sides of the blower wheel blades are uncovered and extend radially outwards on a side opposite the bottom disk and comprise a free end each. 
     
     
         5 . The blower wheel according to  claim 1 , wherein the cover disk, viewed in a radial section, is curved in a funnel-shaped manner and forms an inlet nozzle. 
     
     
         6 . The blower wheel according to  claim 1 , wherein the cover disk has at its circumferential edge, which defines the intake opening, a thickness t which corresponds to the thickness t of the blower wheel blades. 
     
     
         7 . The blower wheel according to  claim 1 , wherein the bottom disk, at least at its radially outer edge, has a thickness t that corresponds to the thickness t of the blower wheel blades. 
     
     
         8 . The blower wheel according to  claim 1 , wherein a radial outer edge of the cover disk has the thickness t of the blower wheel blades. 
     
     
         9 . The blower wheel according to  claim 12 , wherein the bottom and/or cover disk(s) have a constant material thickness t. 
     
     
         10 . The blower wheel according to  claim 1 , wherein a ratio of the diameter of the axial intake opening di and the maximum outer diameter dt of the cover disk di/dt is in a range from 0.5 to 0.7. 
     
     
         11 . The blower wheel according to  claim 1 , wherein radial inner edges of the blower wheel blades are arc-shaped. 
     
     
         12 . The blower wheel according to  claim 1 , wherein it comprises a hub into which the blower wheel blades transition on their radially inner sides. 
     
     
         13 . The blower wheel according to  claim 1 , wherein the outermost radial sections of the cover disk and the bottom disk extend parallel to an axial plane. 
     
     
         14 . The blower wheel according to  claim 1 , wherein the bottom disk and the cover disk extend without overlapping relative to one another in an axial top view, as viewed in a projection. 
     
     
         15 . A blower designed as a gas-air premix blower for delivering a gas-air mixture, including a multi-part blower housing and a motor unit with motor electronics disposed on its outer side, wherein a blower wheel according to  claim 1  is disposed inside said blower housing which, when in operation, draws in air via an intake opening of the blower housing and blows out air via a blowout opening of the blower housing, wherein the motor unit includes a rotor which is in operative connection with the blower wheel.