Abstract: An axial fan and a fan rotor are provided as well as a method of manufacturing same, wherein the rotor hub includes an outer shell having on its outside a hub surface which is essentially rotational-symmetrical about the center axis of the rotor hub; and wherein the rotor hub has a front end and a rear end and a diverging section there between, where the radius of the hub surface in the diverging section is increased by the distance to the front end on the hub; and wherein the rotor hub and the blades are made as separate metal parts; and wherein the rotor blades are securely mounted to the diverging section on the hub surface.

Abstract: An axial fan comprising a circular-cylindrical blower pipe configured about a center axis and comprising one or more plates that are bent and subsequently joined at opposing plate rims for forming the circular-cylindrical blower pipe; and wherein the circular-cylindrical blower pipe has two opposing ends; wherein the blower pipe is, at both its ends, bent outwards at right angles to the outside of the blower pipe for forming a mounting flange. The blower pipe comprises a rust-resistant metal plate or a steel plate which is coated with a rust-resistant material at least on the outside and the inside of the blower pipe; and in that the plate rims are joined in a rim-by-rim manner, without overlap, by soldering or welding with a rust-resistant filler material.

Abstract: A system for constructing an axial blower comprising an essentially circular-cylindrical blower pipe configured about a center axis and an inner pipe serving as motor case; and presenting several mounting options for mounting of motor drives to the effect that it is possible to mount motor drives extending rearwards relative to the inner pipe and motor drives extending primarily within the inner pipe.

Abstract: An axial fan comprising an essentially circular-cylindrical blower pipe configured about a centre axis and comprising one or more plates that are bent and subsequently joined at opposing plate rims for forming the circular-cylindrical blower pipe; and wherein the circular-cylindrical blower pipe has two opposing ends; wherein the blower pipe is, at both its ends, bent outwards essentially at right angles to the outside of the blower pipe for forming a mounting flange. The blower pipe comprises a rust-resistant metal plate or a steel plate which is coated with a rust-resistant material at least on the outside and the inside of the blower pipe; and in that the plate rims are joined in a rim-by-rim manner, without overlap, by soldering or welding with a rust-resistant filler material.

Abstract: An axial fan and a fan rotor are provided as well as a method of manufacturing same, wherein the rotor hub includes an outer shell having on its outside a hub surface which is essentially rotational-symmetrical about the centre axis of the rotor hub; and wherein the rotor hub has a front end and a rear end and a diverging section there between, where the radius of the hub surface in the diverging section is increased by the distance to the front end on the hub; and wherein the rotor hub and the blades are made as separate metal parts; and wherein the rotor blades are securely mounted to the diverging section on the hub surface.

Abstract: A system for constructing an axial blower comprising an essentially circular-cylindrical blower pipe configured about a centre axis and an inner pipe serving as motor case; and presenting several mounting options for mounting of motor drives to the effect that it is possible to mount motor drives extending rearwards relative to the inner pipe and motor drives extending primarily within the inner pipe.