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US 10,480,527 B2Granted
Axial fan with unbalanced blade spacing
AssigneeRobert Bosch GmbH
InventorsRobert J. Van Houten, Yoonshik Shin
Life of this patent
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Abstract
An axial fan comprising a hub and a plurality of blades extending from a periphery of the hub. Each of the blades has a thickness which varies from a leading edge to a trailing edge and from a root to a tip. The blades are unevenly spaced around the periphery of the hub in a pattern which is not balanced. The fan is balanced by variance in blade thickness among the plurality of blades.
Claims17
An axial fan comprising:
- a hub;
- and
- a plurality of blades extending from a periphery of the hub,
- wherein each of the plurality of blades has a thickness which varies from a leading edge to a trailing edge and from a root to a tip,
- wherein the plurality of blades are unevenly spaced around the periphery of the hub in a pattern which is not balanced, and
- wherein the fan is balanced by variance in blade thickness among the plurality of blades, and the blade thickness of a first blade is scaled by individual blade thickness factors to define the thickness of each of the other blades, said blade thickness factors varying among the plurality of blades in such a way that the fan is balanced.
3 more elements
An axial fan comprising:
- a hub;
- and
- a plurality of blades extending from a periphery of the hub,
- wherein each of the plurality of blades has a thickness which varies from a leading edge to a trailing edge and from a root to a tip,
- wherein the plurality of blades are unevenly spaced around the periphery of the hub in a pattern which is not balanced,
- wherein the fan is balanced by variance in blade thickness among the plurality of blades, and
- wherein the spacing of the plurality of blades is symmetric about a line of symmetry, and two of the plurality of blades whose positions are symmetric relative to the line of symmetry have equal thicknesses.
4 more elements
Dependencies are inferred from the claim text.