Heat exchanger with hydrostatic bearing return flow guide

Details Heat exchanger with hydrostatic bearing return flow guide Heat exchanger with hydrostatic bearing return flow guide

1992-04-09

1993-09-21

Rivell, John

Rotary kinetic fluid motors or pumps

Including additional means causing or controlling fluid flow...

Means subjected to or is working fluid

415175, 415177, 1651341, 277 22, F01D 508

Patent

active

052463370

ABSTRACT:
A generally cylindrical thermal shield for a heat exchanger in a centrifugal pump which includes a fixed inner diameter vertical wall that forms an annular clearance coaxially around the pump impeller shaft, an outer vertical wall that has a diameter greater than the diameter of the inner vertical wall, and a bottom section that extends upwardly between the inner and outer diameter vertical walls such that the bottom section meets the outer wall at an obtuse angle and meets the inner wall at an acute angle. Such a construction prevents any part of the outer wall from being located opposite the journal return holes of the impeller chamber and minimizes or eliminates erosive wear that may otherwise occur from the flow of fluid from the return holes against the bearing journal.

REFERENCES:
patent: 3171354 (1965-03-01), Sohlemann
patent: 3213798 (1965-10-01), Carswell
patent: 3620639 (1971-11-01), Gaffal et al.
patent: 3826589 (1974-07-01), Frank et al.
patent: 4005747 (1977-02-01), Ball
patent: 4775293 (1988-10-01), Boster
Drawing PN-2 "Primary Nuclear Pumps" Welded Rotating Element International Heat Exchanger, Byron Jackson Products, Date Unknown.

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