Pumping components, methods of making them, and pumping systems

The pumping component, e.g. an impeller of diffuser, has one or more vanes 58 defining fluid flow paths. To improve the pumping performance of the component, it is cast with a passage 60 formed through each of at least one vane 58 such that an end of the passage is exposed to a low energy flow, i.e....

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Bibliographische Detailangaben
1. Verfasser:	DAVID M ESLINGER
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES HEATING LIGHTING MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT PUMPS PERFORMING OPERATIONS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS POWDER METALLURGY PUMPS FOR LIQUIDS OR ELASTIC FLUIDS TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	The pumping component, e.g. an impeller of diffuser, has one or more vanes 58 defining fluid flow paths. To improve the pumping performance of the component, it is cast with a passage 60 formed through each of at least one vane 58 such that an end of the passage is exposed to a low energy flow, i.e. secondary flow, region. The or each passage 60 enables the flow of a small amount of fluid from the low energy region to an opposite side of the vane 58 to reduce the secondary flow effects and improve pumping efficiency.