Impeller for a pump or turbine, and pump or turbine with impeller
OwnerLars Adriaan Krakersinventor
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Abstract
The invention relates to an impeller for a pump or turbine, comprising at least one blade, which blade is provided on the pressure side thereof with a standing edge on its outer peripheral edge zone. The invention also relates to a pump for pumping water or a turbine for generating energy from water and having a casing and such an impeller.
Claims12
A fish-friendly impeller for a pump or turbine, comprising a casing and the impeller disposed in the casing, the impeller comprising at least one blade, characterized in that the at least one blade includes a standing edge on an outer peripheral edge zone of a pressure side surface of the at least one blade configured to prevent fish from being drawn into a gap between the impeller and the casing of the pump or turbine, wherein the casing includes an inward extending edge at an inlet opening of the casing, the inward extending edge being on an opposite side of the pressure side surface and the standing edge of the at least one blade and wherein the standing edge has a maximum height of approximately 5 cm which decreases close to a foremost and/or rearmost end zone of the at least one blade as seen in the direction of rotation of the impeller to a height of about zero.
A fish-friendly pump for pumping water, comprising a casing and an impeller disposed in the casing, the impeller comprising at least one blade, characterized in that the at least one blade includes a standing edge on an outer peripheral edge zone of a pressure side surface of the at least one blade, wherein the casing includes an inward extending edge at an inlet opening of the casing, the inward extending edge being on an opposite side of the pressure side surface and the standing edge of the at least one blade and wherein the standing edge has a maximum height which decreases close to a foremost and/or rearmost end zone of the at least one blade as seen in the direction of rotation of the impeller to a height of about zero.
A fish-friendly turbine for generating energy from water, comprising a casing and an impeller disposed in the casing, the impeller comprising at least one blade, characterized in that the at least one blade includes a standing edge on an outer peripheral edge zone of a pressure side surface of the at least one blade, wherein the casing includes an inward extending edge at an outlet opening of the casing, and wherein the standing edge has a maximum height which decreases close to a foremost and/or rearmost end zone of the at least one blade as seen in the direction of rotation of the impeller to a height of about zero.
Dependencies are inferred from the claim text.