Pumps – Three or more cylinders arranged in parallel – radial – or... – Motor driven
Patent
1987-09-18
1989-07-25
Freeh, William L.
Pumps
Three or more cylinders arranged in parallel, radial, or...
Motor driven
417357, 310 68R, F04B 120, F04B 3504, H02K 714
Patent
active
048508128
ABSTRACT:
An integrated motor pump unit for use as a hydraulic fluid pressure source at a remote location incorporates a pump rotor affixed in the center of a motor rotor. The motor/pump rotor assembly spins on a fixed shaft in a combination providing both radial journal and axial thrust bearings. The stationary shaft assembly incorporates a piston drive mechanism which is angled, relative to the shaft axis, so that reciprocal movement of the pistons is developed as they rotate about the axis. The fixed rotor shaft is axially adjustable to control the end clearance between the pistons and cam surfaces, and contains fluid flow galleries to the journal and thrust bearings. A magnetically permeable sleeve is mounted between the motor stator and rotor to seal the hydraulic fluid within the rotor space, thereby maintaining the stator windings and associated electronic circuitry in a dry environment. The combination functions as a servo pump under the control of an associated electronic motor controller unit and has the capability of providing variable flow directions and flow rates and pressures over a wide range for driving a hydraulic actuator or the like.
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Bissell Henry M.
F.P.I., Inc.
Freeh William L.
Versatron Corporation
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