Impeller, in particular for an axial fan
Assigneeebm-papst Mulfingen GmbH & Co. KG
InventorsErhard Gruber, Reinhard (FH) Strohmeier, Otmar Huegel
Life of this patent
Estimating the term…
Abstract
An impeller for an axial fan of the type adapted to be pressed onto a rotating rotor comprising a number of blades. The blades protrude radially outward from a substantially tubular hub, which carries the blades and is adapted to be pressed onto the rotating rotor. A substantially cylindrical blank is arranged inside the hub where the blank forms alternately arranged first and second portions. The first portions have a greater inside diameter than the inside diameter of the second portions.
Claims8
An impeller for an axial fan of the type adapted to be pressed onto a rotating rotor, comprising a number of blades, protruding radially outward from a substantially tubular hub, which carries the blades and is adapted to be pressed onto the rotating rotor, a substantially cylindrical blank being arranged inside the hub, wherein the blank forms alternately arranged first and second portions, the first portions having a greater inside diameter than the inside diameter of the second portions, and wherein the blank is formed of metal and is surrounded by a plastic encapsulation wherein the blank has radially outwardly protruding lugs in the region of the first portions, wherein the blank in regions of the first portions is joined to the hub by means of webs, wherein the lugs of the blank are embedded in the plastic encapsulation with a form fit and material bond, in the region of the webs.
An impeller for an axial fan of the type adapted to be pressed onto a rotating rotor, comprising a number of blades, protruding radially outward from a substantially tubular hub, which carries the blades and is adapted to be pressed onto the rotating rotor, a substantially cylindrical blank being arranged inside the hub, wherein the blank forms alternately arranged first and second portions, the first portions having a greater inside diameter than the inside diameter of the second portions wherein pockets are incorporated in the hub, which pockets are arranged in the plastic encapsulation in the region of the first portions of the blank.
An impeller for an axial fan of the type adapted to be pressed onto a rotating rotor, comprising a number of blades, protruding radially outward from a substantially tubular hub, which carries the blades and is adapted to be pressed onto the rotating rotor, a substantially cylindrical blank being arranged inside the hub, wherein the blank forms alternately arranged first and second portions, the first portions having a greater inside diameter than the inside diameter of the second portions, wherein pockets are incorporated in the hub, which pockets are arranged in the plastic encapsulation in the region of the first portions of the blank, and wherein the pockets in the hub are formed continuously in the axial direction.
An impeller for an axial fan of the type adapted to be pressed onto a rotating rotor, comprising a number of blades, protruding radially outward from a substantially tubular hub, which carries the blades and is adapted to be pressed onto the rotating rotor, a substantially cylindrical blank being arranged inside the hub, wherein the blank forms alternately arranged first and second portions, the first portions having a greater inside diameter than the inside diameter of the second portions, wherein pockets are incorporated in the hub, which pockets are arranged in the plastic encapsulation in the region of the first portions of the blank, and wherein the pockets are formed in a slot-like manner in outline and are circumferentially separated from one another by a web portion of the webs joining the blank to the hub.
Dependencies are inferred from the claim text.