Importance

Loading Importance Indicators...

Abstract

A percolator system for providing fluid flow to bearings and seals supporting a shaft, on which is mounted an impeller having pumping vanes, disposed within a housing of a centrifugal pump, during intermittent dry running periods, the pump having a vertical upwardly directed discharge nozzle, includes a chamber having a lower end attached to the discharge nozzle and an upper end attached to a discharge pipe, the chamber having an inside diameter greater than an outside diameter of the discharge nozzle, and the chamber further having an internal percolator pipe at least equal in diameter to the discharge nozzle and extending from the nozzle to a height less than the height of the chamber such that fluid coming from the nozzle overflows into the chamber. A fluid return port near the lower end of the chamber has one end of a return tube attached. The other end of the return tube is attached to an external injection connection which connects with a passage within the housing for conducting fluid from the injection connection to the bearings and seals and thence to a torus of liquid at a volute in the housing.

Loading the Abstract Image...

First Claim