Selecting and validating the hydraulic circuit of hydraulic actuating gear of sustained power with computer control

Authors: Malkerova T.S.
Published in issue: #10(15)/2017
DOI: 10.18698/2541-8009-2017-10-184
Category: Power, Metallurgic and Chemical Engineering | Chapter: Hydraulic Machines and Hydropneumatic units
Keywords: hydraulic actuator with volumetric control, range of regulation, controlled pump, controlled hydraulic motor, uncontrolled hydraulic motor, hydraulic motor unit, total volume, displacement volume of hydraulic motor, range of speed variation
Published: 09.10.2017

The article considers differentcircuits ofhydraulic actuators with volumetric control. Itisestablishedthattheapplicationofthe actuators circuits withpump and motor control does not provide a wide range of speed variation. One of the prospective hydraulic circuits with the extended range of regulatingthe stepless speed of the output shaft is a hydraulic actuating gearcomprising a hydraulic motor unit which has two hydraulic machines working for the common gear shaft. The first hydraulic machine is an uncontrolled hydraulic motor; the second one is a controlledpump-motor. The hydraulic motor unit allows getting an extended range of speed regulationcompared to the controlled hydraulic motor of the equivalentdisplacement volume. The controlled motor can perform a reversal and change to the pumping mode, which theoretically allows getting the regulation of the motor total volume from maximum to zero.

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