Radial fan
AssigneeGebr. Becker GmbH
InventorsBernhard Radermacher, Frank Diedrichsen, Achim Von Kathen
Life of this patent
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Abstract
The invention relates to a radial fan (1), preferably a high-speed radial fan, comprising a blower wheel (8), a housing (2) which receives a rotor (6) and a stator (5) of an electrical drive (4) of the blower wheel shaft (7), and a cooling system. The aim of the invention is to develop one such radial fan in terms of the cooling system required. To this end, paths (30, 37) for a first cooling medium (K1) and a second cooling medium (K2) are provided in the housing (2), the second cooling medium (K2) being cooled by the first cooling medium (K1) as provided for by the housing (2), and the paths (30, 37) are separated from each other by intact material walls (40) of the housing (2).
Claims16
A radial fan having an impeller and a housing assembly, the impeller having a periphery, a cover side, and an underside, the housing assembly comprising a cover, and at least the cover comprising a light-metal casting material, wherein, in order to form a cage which encloses the impeller, a cover-side cage plate is provided on the cover side and an underside cage plate is provided on the underside of the impeller, the cover-side and underside cage plates being held together around the periphery of the impeller by connectors, at least the connectors and the cover-side cage plate comprising a hard and tough material, wherein further the connectors are formed with steel collars or are provided with steel nuts in order to support the cover-side and underside cage plates at a respective rear portion of each of the cover-side and underside cage plates,
- wherein a diffuser part is disposed beneath the cover, and the cover-side cage plate is disposed between the cover and the diffuser part,
- wherein the impeller has blades, wherein in a radial direction the blades have a total range of different heights along a longitudinal axis of the impeller,
- wherein a gap formed by the cover-side and underside cage plates over a portion of the longitudinal axis of the impeller overlaps only a partial range of the total range of heights of the blades, and
- wherein the partial range includes at least a height of the blades at their greatest radial extent.
Dependencies are inferred from the claim text.