Pumps – Condition responsive control of pump drive motor
Patent
1982-01-21
1983-09-20
Freeh, William L.
Pumps
Condition responsive control of pump drive motor
418194, 418201, 308 10, F16C 3500, F04B 4906, F04B 4900, F04C 216
Patent
active
044052863
ABSTRACT:
A counter-rotating machine, such as a positive displacement pump having a pair of meshed, non-contacting helical screws (10,12), subjects its rotating members to axial and radial thrust forces when used for such purposes as compression of liquid or gaseous phase fluids while transporting them through a pump cavity (11,13). Each helical screw (10,12) has a shaft (17,17') which is actively suspended at opposite ends (11a,11b) of the pump cavity by a servo-controlled magnetic bearing assembly (19) and a servo-controlled rotary drive motor (20). Both bearing assemblies and drive motors are mounted on the outside of the pump cavity (11,13). Opto-electric angular position sensors (250) provide synchronization between radial orientation of the drive motors. The bearing assemblies and drive motors conjugately provide axial stabilization and radial centering of the helical screws during volumetric compression of aspirated liquid or gaseous phase fluids.
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Bushnell Robert E.
Freeh William L.
Manning John R.
The United States of America as represented by the Administrator
Tresansky John O.
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