Open-type centrifugal pump with single-blade impeller
OwnerMartin Stahleinventor
Life of this patent
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Abstract
The housing wall (23) through which the impeller shaft passes is embodied as a truncated cone. The leading edge (28) of the impeller blade flank (27) on the delivery side of the pump which grazes this housing wall with little clearance (24) extends in a spiral from the impeller blade tip (35) up to a point (31) at which it terminate in the hub; as a result, a relatively large area of the housing wall (23) having a width b decreasing toward the inside and located between the blade flank on the delivery side and the blade flank on the intake side is exposed between the blade outlet tip (35) and this terminal point (31).
Claims22
A centrifugal pump of the open type with a single-blade impeller, in particular for pumping viscous media, wherein the discharge end of the blade, with clearance, grazes a housing wall through which the shaft of the impeller passes, and the blade flank on the delivery side of the pump terminates prior to the housing wall in a leading edge which extends between the tip of the end edge of the blade and the hub of the impeller, characterized in that the housing wall is a right truncated cone, wherein the leading edge of the impeller blade flank on the delivery side grazing the truncated-cone wall with clearance (4;
- 24) extends from the blade outlet tip over a relatively long distance of at least 20.degree. up to a point at which it terminates in the impeller hub.
Dependencies are inferred from the claim text.