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System for the construction of an axial fan

  • US 8,967,983 B2
  • Filed: 10/13/2010
  • Issued: 03/03/2015
  • Est. Priority Date: 10/13/2009
  • Status: Active Grant
First Claim
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1. A kit for construction of an axial fan system in a duct, comprising:

  • an essentially circular-cylindrical blower pipe configured about a centre axis, including a fan rotor that is configured within the blower pipe, the fan rotor;

    (1) having a rotor hub that essentially coincides with the centre axis of the blower pipe, and (2) being connected to and extending from a drive shaft in a motor drive;

    a motor case that is provided behind the fan rotor for mounting and retaining the motor drive, said motor case including;

    an essentially circular-cylindrical inner pipe having a frontmost end facing towards the rotor hub and a rearmost end facing away from the rotor hub, and being retained in the blower pipe by means of a number of ribs to the effect that the centre axis of the inner pipe coincides with the centre axis of the blower pipe, andone or more mounting fittings configured for mounting of the motor drive to the inner pipe, andat least one small motor drive and at least one large motor drive, the at least one small motor drive and the at least one large motor drive being both configured for mounting on a mounting fitting, and a largest dimension of the at least one small motor drive measured at right angles to the centre axis of the drive shaft is smaller than a corresponding largest dimension on the at least one large motor drive, wherein;

    a radius on an inner side of the inner pipe is larger than the largest dimension of the at least one small motor drive and smaller than the largest dimension of the at least one large motor drive, andthe mounting fitting includes;

    a first fitting allowing the small motor to be mounted to the inner pipe such that at least the part of the at least one small motor which has the larger dimension extends completely within the inner pipe, anda second fitting allowing the at least one large motor to be mounted to the inner pipe such that at least the part of the at least one large motor which has the larger dimension extends completely behind the rearmost end of the inner pipe.

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