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AssigneeGebr. Becker GbmH
InventorsLars Buchholz, Antje Gennat, Ulli Kriebel, Henryk Waniek, Achim Von Kathen
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The invention relates to an impeller (1), in particular for a side channel machine, comprising blades (5) arranged distributed in the circumferential direction and formed in each case by a blade wall (6), which blades form open blade chambers (4) in a plan view onto the impeller (1), wherein a blade wall (6) in the plan view starts at a first radius dimension (r1) related to the geometrical impeller rotation axis (x), which first radius dimension (r1) corresponds to half or more than half of a second radius dimension (r2), which second radius dimension (r2) defines a circumferential rim edge (9) of the impeller (1), and wherein the radius dimension (r1) defines a radially inner boundary wall (7) of the blade chamber (4), wherein furthermore a blade wall (6) comprises an exposed upper terminating edge, which runs correspondingly radially on the inside into the inner boundary wall (7) and ends radially on the outside in plan view, wherein an imaginary connecting line (V) can be drawn between a run-in point of the terminating edge (12) into the inner boundary wall (7) and a radially outer end of the terminating edge (12) and the terminating edge runs normal to the connecting line (V) with a different offset dimension, wherein a greatest offset dimension results. For the advantageous development, in particular with regard to improved efficiency, it is proposed that the greatest offset dimension corresponds to 0.1 times or more the difference between the second (r2) and the first radius dimension (r1).
An impeller comprising blades arranged distributed in the circumferential direction and formed in each case by a blade wall, wherein each blade forms an open blade chamber in a plan view onto the impeller, in which plan view a geometrical impeller rotation axis is depicted in a point-like manner, wherein the blade wall in the plan view starts at a first radius dimension related to the geometrical impeller rotation axis, which first radius dimension corresponds to half or more than half of a second radius dimension, which second radius dimension defines a circumferential rim edge of the impeller, and wherein the first radius dimension defines a radially inner boundary wall of the blade chamber, wherein furthermore a blade wall comprises an exposed upper terminating edge, which runs correspondingly radially on the inside into the inner boundary wall and ends radially on the outside in plan view, wherein an imaginary connecting line can be drawn between a run-in point of the terminating edge into the inner boundary wall and a radially outer end of the terminating edge and the terminating edge runs normal to the connecting line with a different offset dimension, wherein a greatest result of the different offset dimension corresponds to 0.1 times or more the difference between the second and the first radius dimension.
Dependencies are inferred from the claim text.