Rotary kinetic fluid motors or pumps – With shaft connected fluid force subjected thrust balancing... – In separate chamber having non-system fluid inlet
Patent
1988-03-11
1989-04-18
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
With shaft connected fluid force subjected thrust balancing...
In separate chamber having non-system fluid inlet
277 27, 277173, F01D 304
Patent
active
048222402
ABSTRACT:
A compressor includes a rotor which is subject on the inlet side to high pressure process fluid whereas the other end of the rotor is subject to atmospheric pressure. This creates a force unbalance in the axial direction for which thrust bearings are designed under dynamic operating conditions. At start-up and shutdown, periods of low speed operation, force unbalance is particularly acute since the normal impeller high speed reactive forces are not present. This invention utilizes available high pressure seal fluid during periods of low speed operation to provide a closed operating chamber which will provide a static reactive force opposing the process fluid force. Under normal operating conditions, lubricating oil is then sent to the thrust bearing as the high pressure seal fluid is relieved.
REFERENCES:
patent: 3506375 (1970-04-01), Endress
patent: 4309144 (1982-01-01), Eggmann et al.
patent: 4413946 (1983-11-01), Marshall
Garrett Robert E.
General Electric Company
Kwon John T.
Squillaro Jerome C.
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