Multipart fan wheel with a fan wheel hub and a plurality of fan wheel blades formed separately therefrom
Assigneeebm-papst Mulfingen GmbH & Co. KG
InventorsErhard Gruber, Oliver Haaf, Thorsten Pissarczyk, Alexander Konzal
Life of this patent
Estimating the term…
Abstract
A fan wheel (1) with a plurality of fan wheel blades (10) and a fan wheel hub (20) can be fixed to a motor (30) in order to drive the fan wheel (1) about a rotation axis (X) that extends centrally through the fan wheel hub (20). Each of the fan wheel blades (10) can be screwed to the fan wheel hub (20) by at least one screw (41, 42). A longitudinal screw axis (L) extends parallel to the rotation axis (X). The fan wheel hub (20) has a corresponding screw receptacle (21, 22) for each of the screws (41, 42).
Claims16
An axial fan wheel comprising:
- a plurality of fan wheel blades and a fan wheel hub fixed to a motor in order to drive the fan wheel in rotation about a rotation axis extending centrally through the fan wheel hub;
- each of the fan wheel blades can be screwed to the fan wheel hub by at least one screw with a longitudinal screw axis extending parallel to the rotation axis;
- and
- the fan wheel hub has a corresponding screw receptacle for each of the screws for screwing to the fan wheel blades;
- a rotor flange for connecting the fan wheel blade to a rotor of the motor, and
- at least a part of the fan wheel blades can be screwed simultaneously to the fan wheel hub and the rotor flange by at least one of the screws with its screw longitudinal axis extending parallel to the rotation axis.
An axial fan wheel comprising:
- a plurality of fan wheel blades and a fan wheel hub fixed to a motor in order to drive the fan wheel in rotation about a rotation axis extending centrally through the fan wheel hub;
- each of the fan wheel blades can be screwed to the fan wheel hub by at least one screw with a longitudinal screw axis extending parallel to the rotation axis;
- and
- the fan wheel hub has a corresponding screw receptacle for each of the screws for screwing to the fan wheel blades;
- wherein the fan wheel blades are made of plastic and at least one screw feedthrough is embodied as a metal insert for passing through one of the screws and for contact with the at least one screw and/or the fan wheel hub;
- and/or the fan wheel hub is made of plastic and the corresponding screw receptacles are each embodied as a metal insert and for contact with a respective fan wheel blade or have said metal insert.
Dependencies are inferred from the claim text.