Impeller for a centrifugal pump
AssigneeSulzer Management AG
InventorsMatti Koivikko, Kalle Tiitinen, Sami Virtanen, Jussi Matula
Life of this patent
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Abstract
The present invention relates to a centrifugal pump, the impeller of which comprises a shroud (34) with at least one solid and rigid working vane (36), and at least one solid and rigid rear vane (38), the at least one working vane (36) having a leading edge region (46), a trailing edge region (48), a central region (C), a side edge, a pressure face (42) and a suction face (44), the at least one solid and rigid rear vane (38) having a trailing edge region, a side edge, a pressure face and a suction face. The trailing edge region (48) of the at least one working vane (36) is rounded by means of a rounding to have a thickness greater than that in the central region (C).
Claims14
An impeller for a centrifugal pump, the impeller comprising a hub with at least one solid and rigid working vane, the at least one solid and rigid working vane having a leading edge region, a trailing edge region, a central region, a thickness at the central region, a side edge, a pressure face, and a suction face, the leading edge region of the at least one solid and rigid working vane being provided with a first rounding having a thickness greater than that in the central region, wherein the trailing edge region of the at least one solid and rigid working vane is provided with a second rounding to have a thickness greater than that in the central region, and wherein the second rounding at the trailing edge region is arranged on the pressure face of the working vane.
An impeller for a centrifugal pump, the impeller comprising a hub with at least one solid and rigid working vane, the at least one solid and rigid working vane having a leading edge region, a trailing edge region, a central region, a thickness at the central region, a side edge, a pressure face, and a suction face, the leading edge region of the at least one solid and rigid working vane being provided with a first rounding having a thickness greater than that in the central region, the trailing edge region of the at least one solid and rigid working vane being provided with a second rounding to have a thickness greater than that in the central region, wherein the side edge of the at least one working vane is rounded.
An impeller for a centrifugal pump, the impeller comprising a hub with at least one solid and rigid working vane, the at least one solid and rigid working vane having a leading edge region, a trailing edge region, a central region, a thickness at the central region, a side edge, a pressure face, and a suction face, the leading edge region of the at least one solid and rigid working vane being provided with a rounding having a thickness greater than that in the central region, the trailing edge region of the at least one solid and rigid working vane being provided with a rounding to have a thickness greater than that in the central region, the impeller having at least one rear vane, the at least one rear vane having a trailing edge region, a side edge, a pressure face and a suction face, the trailing edge region of the at least one rear vane being having a third rounding, wherein the side edge of the at least one rear vane is rounded.
An impeller for a centrifugal pump, the impeller comprising a hub with at least one solid and rigid working vane, the at least one solid and rigid working vane having a leading edge region, a trailing edge region, a central region, a thickness at the central region, a side edge, a pressure face, and a suction face, the leading edge region of the at least one solid and rigid working vane being provided with a first rounding having a thickness greater than that in the central region, the trailing edge region of the at least one solid and rigid working vane being provided with a second rounding to have a thickness greater than that in the central region, wherein the trailing edge of the shroud is rounded.
Dependencies are inferred from the claim text.