Rotary kinetic fluid motors or pumps – Including heat insulation or exchange means – Working fluid on at least one side of heat exchange wall
Patent
1990-08-09
1992-09-01
Look, Edward K.
Rotary kinetic fluid motors or pumps
Including heat insulation or exchange means
Working fluid on at least one side of heat exchange wall
415112, 277 20, 376203, 376310, 376402, 417366, F01D 508
Patent
active
051435152
ABSTRACT:
A pump assembly which overcomes a shaft and cover cracking problem comprising a means for heating the seal purge water flowing along the shaft before it exits into an annulus (mixing region) thus reducing the temperature difference between the cooler seal purge water and the hotter product water prior to the mixing of the two waters. Three embodiments of the invention include 1) a cover sleeve surrounding the pump shaft which extends into the hydrostatic bearing (mixing region) so as to be heated by the product water and thereby heating the seal purge water before mixing with the product water, 2) a rotating shaft sleeve surrounding the pump shaft which extends into the hydrostatic bearing (mixing region) to heat the seal purge water by circulating product water before mixing with the product water and 3) a rotating baffle type heat exchanger extending into the hydrostatic bearing (mixing region) to heat the seal purge water flowing in a bi-directional path by product water also flowing in a bi-directional path before mixing with the product water.
REFERENCES:
patent: 4005747 (1977-02-01), Ball
patent: 4109920 (1978-08-01), Wiese
patent: 4690612 (1987-09-01), Jenkins
patent: 4775293 (1988-10-01), Boster
patent: 4932836 (1990-06-01), Boster
Boster Clark S.
Gopalakrishnan Sankaraiyer
Reimers Carl F.
Vaghasia Gordhan K.
BW/IP International, Inc.
Dwyer Joseph R.
Look Edward K.
Verdier Christopher M.
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