Centrifugal or diagonal impeller with modified blade edge
Assigneeebm-papst Mulfingen GmbH & Co. KG
InventorsErhard Gruber, Michael Strehle, Daniel Gebert
Life of this patent
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Abstract
A centrifugal or diagonal impeller has impeller blades (4) that are curved in the circumferential direction about an axis of rotation and are formed from a single-layer sheet metal. Each blade (4) has a suction side (11) and a pressure side (12) as well as a blade leading edge (5) and a blade trailing edge (6). At least the blade leading edge (5) of the impeller blades (4) adjacent to their suction side (11) have a geometric edge modification in the form of a rounding (7) over a predetermined partial length of a blade thickness (SD) of the impeller blades (4).
Claims13
A centrifugal or diagonal impeller comprising:
- impeller blades curved in the circumferential direction about an axis of rotation and formed from a single-layer sheet metal;
- each blade has a suction side, a pressure side as well as a blade leading edge and a blade trailing edge;
- and
- at least the blade leading edge of the impeller blades adjacent to their suction side has a geometric edge modification in the form of a rounding that is limited over a predetermined partial length of a blade thickness of the impeller blades, wherein the blade leading edge of the impeller blades adjacent to their pressure side is formed without the edge modification and has a beveled shape.
Dependencies are inferred from the claim text.