Diagonal fan

Abstract

The invention relates to a diagonal fan for gaseous media, with a diagonal impeller ( 26 ) having a carrier plate ( 33 ) with several vanes ( 36 ) arranged thereon, with a guide device ( 28 ) that is connected downstream to the diagonal impeller ( 26 ) for increasing the pressure of the medium, and with a cover plate ( 40 ), which encloses the carrier plate ( 33 ) radially and which extends, at least in sections, axially along the carrier plate ( 33 ), wherein a gap ( 43 ) is formed between the vane ends ( 37 ) of the vanes ( 36 ) on the carrier plate ( 33 ), which extend towards the cover plate ( 40 ), and wherein the vane ends ( 37 ) of the vanes ( 36 ) on the carrier plate ( 33 ) and a peripheral face ( 39 ) of the cover plate ( 40 ), which is allocated to the vane ends ( 37 ), can be positioned axially relatively to one another for adjusting a gap width S of the gap ( 43 ) with at least one axial adjustment unit ( 61 ) (see FIG. 1 for this).

1 . Diagonal fan for gaseous media
 having a diagonal impeller, which has a carrier plate having several vanes arranged thereon,   having a guide device connected downstream to the diagonal impeller for increasing the pressure of the medium and   having a cover plate, which encloses the carrier plate radially and which extends axially, at least in sections, along the carrier plate,   wherein a gap is formed between the vane ends of the vanes on the carrier plate, which extend in the direction of the cover plate, and the cover plate,   wherein the vane ends of the vanes on the carrier plate and a peripheral face of the cover plate, which is allocated to the vane ends, is positioned relative to one another for adjusting a gap width S of the gap axially with at least one axial adjustment unit.   
     
     
         2 . Diagonal fan according to  claim 1 , wherein the at least one axial adjustment unit is provided between the carrier plate and a motor that drives the carrier plate, and in that the cover plate is provided statically on a housing portion of an intake unit. 
     
     
         3 . Diagonal fan according to  claim 1 , wherein the at least one axial adjustment unit is provided between the cover plate and a housing portion or on an inlet nozzle of an intake unit, and in that the carrier plate is provided statically on the driveshaft of the motor. 
     
     
         4 . Diagonal fan according to  claim 1 , wherein the axial adjustment unit is provided between a motor cover arranged on the housing portion of the guide device and a motor that drives the carrier plate. 
     
     
         5 . Diagonal fan according to  claim 1 , wherein an axial adjustment unit is provided between a housing portion of the guide device and a motor cover that encloses a motor. 
     
     
         6 . Diagonal fan according to  claim 1 , wherein the at least one axial adjustment unit is provided between the carrier plate and a motor that drives the carrier plate and/or between the cover plate and a housing portion or on an inlet nozzle of an intake unit and/or between a motor cover and the motor and/or between a housing portion of the guide device and a motor cover that receives a motor. 
     
     
         7 . Diagonal fan according to  claim 1 , wherein the axial adjustment unit has at least one adjustment element, with which the carrier plate is adjustable continuously with respect to the motor, or the cover plate with respect to the housing portion or to the inlet nozzle of the intake unit. 
     
     
         8 . Diagonal fan according to  claim 7 , wherein the adjustment element of the axial adjustment unit is arranged with an energy storage element in a pre-stressed state in an axial position to the motor or housing portion or inlet nozzle of the intake unit. 
     
     
         9 . Diagonal fan according to  claim 7 , wherein the adjustment element of the axial adjustment unit is secured with a security unit, in particular a releasable clamping unit or a releasable clamping connection, after the gap width S of the gap has been adjusted. 
     
     
         10 . Diagonal fan according to  claim 7 , wherein the axial adjustment unit is designed as a screw connection with an adjusting screw as the adjustment element, or as a fastener connection with a tension rod as the adjustment element. 
     
     
         11 . Diagonal fan according to  claim 7 , wherein the adjustment element of the axial adjustment unit between the carrier plate and the motor engages with a driveshaft of the motor or with the carrier plate. 
     
     
         12 . Diagonal fan according to  claim 7 , wherein the adjustment element of the axial adjustment unit between the cover plate and a housing portion or an inlet nozzle of the intake unit is designed as an external thread on the cover plate, which engages with the housing portion or the inlet nozzle of the intake unit. 
     
     
         13 . Diagonal fan according to  claim 1 , wherein the axial adjustment unit has at least one adjustment element, whereby the carrier plate is adjustable with respect to the motor or the cover plate to the housing portion or to the inlet nozzle of the intake unit in a predetermined gradation. 
     
     
         14 . Diagonal fan according to  claim 13 , wherein the adjustment element is designed as a fitting pin, a fitting key or a fitting protrusion, which can be arranged into a stepped recess, into depressions that are arranged individually alongside one another or openings that have depths that are axially different from one another. 
     
     
         15 . Diagonal fan according to  claim 13 , wherein the adjustment element is designed as an adjusting screw or a tension rod, which is particularly provided between the carrier plate and the motor that drives the carrier plate, on which spacing elements having predetermined lengths is arranged. 
     
     
         16 . Diagonal fan according to  claim 1 , wherein the at least one axial adjustment unit is provided between the cover plate and a housing portion or on an inlet nozzle of an intake unit. 
     
     
         17 . Diagonal fan according to  claim 1 , wherein the at least one axial adjustment unit is provided between a motor cover and the motor or between a housing portion of the guide device and a motor cover that receives a motor. 
     
     
         18 . Diagonal fan according to  claim 8 , wherein the adjustment element of the axial adjustment unit is secured with a releasable clamping unit or a releasable clamping connection.