Apparatus and Method for Recuperation of Hydraulic Energy
AssigneeNational Oilwell Varco Norway AS
InventorsDavid Bengt Johan Ankargren, Jochen Pohl
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Abstract
An apparatus for recuperation of hydraulic energy from an actuator comprises a first hydraulic machine having a first drive and a second hydraulic machine having a second drive mechanically coupled to the first drive. The first hydraulic machine is in hydraulic communication with an actuator, and the second hydraulic machine (20) is in hydraulic communication with an accumulator.
Claims8
An apparatus for recuperation of hydraulic energy from an actuator comprises:
- a first hydraulic machine having a first drive;
- a second hydraulic machine having a second drive coupled to the first drive;
- wherein the first hydraulic machine is in hydraulic communication with an actuator and the second hydraulic machine is in hydraulic communication with an accumulator;
- a first valve in hydraulic communication with the second hydraulic machine, the actuator and the accumulator, wherein the first valve is configured to transition between a first position with the second hydraulic machine in hydraulic communication with the accumulator and a second position with the second hydraulic machine in hydraulic communication with the actuator.
A method for recuperation of hydraulic energy from an actuator during load conditions wherein at least one hydraulic pump is configured to supply hydraulic fluid to the actuator, the method comprising:
- mechanically coupling a first hydraulic pump and a second hydraulic for torque transmission therebetween;
- positioning a first valve in an actuator pipe between the actuator and the second hydraulic pump;
- actuating the first valve to divert hydraulic fluid from the second hydraulic pump away from the actuator when the actuator is supplying hydraulic fluid to the first hydraulic machine.
Dependencies are inferred from the claim text.