Rotodynamic fluid pumps

Details Rotodynamic fluid pumps Rotodynamic fluid pumps

1975-04-30

1976-08-24

Raduazo, Henry F.

Rotary kinetic fluid motors or pumps

With means for re-entry of working fluid to blade set

Cross flow runner

415175, F04D 500

Patent

active

039763919

ABSTRACT:
A centrifugal fluid pump includes a casing housing an impeller having a suction eye, an axial fluid inlet to the impeller eye, a fluid discharge, and a recirculation line for recycling leakage liquid from the casing to the fluid inlet to minimise the risk of cavitation occurring at the impeller eye. A heat exchanger is located in the recirculation line for cooling the recycled leakage liquid and has control means associated therewith. The recycled liquid is introduced by a duct into the fluid inlet close to the impeller eye with an axial component of flow so that disturbance to flow in the inlet is reduced. In particular, the recirculation line may discharge into an annular velocity stabilising chamber at the fluid inlet, and a frusto-conical passage delivers the liquid from the chamber to the fluid inlet.

REFERENCES:
patent: 2283131 (1942-05-01), Shaw et al.
patent: 3651866 (1972-03-01), Lileg et al.
patent: 3677659 (1972-07-01), Williams
patent: 3758226 (1973-09-01), Gyurech
patent: 3811789 (1974-05-01), Randell

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