Power plants – Pressure fluid source and motor – Condition responsive control of pump or motor displacement
Patent
1991-10-01
1992-06-02
Look, Edward K.
Power plants
Pressure fluid source and motor
Condition responsive control of pump or motor displacement
60459, 60450, 60451, 60489, 91497, 91498, F16D 3102
Patent
active
051176343
ABSTRACT:
In an apparatus for controlling the operation of hydraulic motors having infinitely adjustable eccentricity, wherein a flow-control valve between a pump and a hydraulic motor supplied with pressure medium and a control valve for adjusting the eccentricity of the hydraulic motor as a function of the operating pressure required by the hydraulic motor are provided, in connection with pressure optimization for keeping constant the torque of the hydraulic motor, the hydraulic motor is provided with a regulating device (7,10) which is mechanically connected to the eccentric (3) and transmits an eccentric adjustment outward, wherein this mechanical regulating device (7,10) acts on the flow-control valve (17) in such a way that, as a function of the change in the eccentricity, the flow-control valve (17) controls the pressure-medium quantity supplied to the hydraulic motor in such a way that the speed of the hydraulic motor is kept constant.
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Marian Alfred
Szewczyk Mathias
Look Edward K.
Mattingly Todd
Paul Pleiger Maschinenfabrik GmbH & Co. KG
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