Pump impeller and pump herewith
AssigneeHerborner Pumpentechnik Gmbh & Co KG
InventorSascha Korupp
Life of this patent
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Abstract
A pump impeller, which can be part of a pump, has an impeller surface and blades being arranged on the impeller surface, wherein at least one of the blades is a blade of the first type which has a blade edge which is inclined toward the front in the rotational direction. The pump impeller can also have blades of a first type and of a second type, the blade geometries thereof differing from one another. A housing element for a pump or of a pump has a housing inner wall defining a flow channel for a fluid medium extending along a central axis. The cross section of the flow channel is greater in a main flow direction and the housing inner wall has a surface structure configured such that it counteracts a return flow counter to the main flow direction along the housing inner wall of the fluid medium.
Claims12
A pump impeller (1) with an impeller surface (11) on which blades (2, 3) are arranged, wherein at least one of the blades (2, 3) is a blade of the first type (2), wherein a blade geometry of the blade of the first type (2) has a blade edge (22) which is inclined toward a front in a rotational direction (DR), wherein the blade edge (22) is arranged on a base body (21) of the blade geometry of the blade of the first type (2), wherein the base body (21) adjoins the impeller surface (11) and the blade edge (22) is arranged spaced apart from the base body (21),
- characterized in that at least one of the blades (2, 3) is a blade of the second type (3), wherein the blade geometry of the blade of the first type (2) differs from a blade geometry of the blade of the second type (3), wherein the blade geometry of the blade of the second type (3) comprises a base body (31) which adjoins the impeller surface (11) and comprises a blade cover (32) which adjoins the base body (31), wherein a pumping channel (13) is configured between the blade cover (32), the base body (31) and the impeller surface (11), wherein the blade geometry of the blade of the first type (2) does not have a blade cover.
Dependencies are inferred from the claim text.