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Hydraulic Actuation Mechanism for Double Acting Cylinder

IP.com Disclosure Number: IPCOM000238227D
Publication Date: 2014-Aug-11
Document File: 3 page(s) / 148K

Publishing Venue

The IP.com Prior Art Database

Abstract

Double acting cylinders are commonly used for applications when kinematics require an expandable and retractable movement. Typically those cylinders feature complex hydraulic schematics to actuate and control the movement. This idea uses a phenomenon only being available for systems being submerged in elevated environmental pressure. In fact the idea uses the hydrostatic pressure to push the cylinder back (retract) while the system generated (pump) pressure expands the piston. The push back retract can only be done when the cylinder pressure is below the environmental pressure, hence the hydraulic schematic requires a method to reduce the cylinder pressure (retract) as well as to increase the cylinder pressure above hydrostatic pressure (expand). A simple element for this feature is using a hydraulic motor instead of the commonly used hydraulic pump powered by an electrical motor. The hydraulic motor allows to reverse flow and pressure and hence allows to expand and retract a single acting hydraulic piston as if it was a double acting one. This feature eliminates multiple hydraulic elements and hence increases the reliability and decreases the cost.

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Title:

Hydraulic Actuation Mechanism for Double Acting Cylinder

Abstract:

Double acting cylinders are commonly used for applications when kinematics require an expandable and retractable movement. Typically those cylinders feature complex hydraulic schematics to actuate and control the movement. This idea uses a phenomenon only being available for systems being submerged in elevated environmental pressure. In fact the idea uses the hydrostatic pressure to push the cylinder back (retract) while the system generated (pump) pressure expands the piston. The push back retract can only be done when the cylinder pressure is below the environmental pressure, hence the hydraulic schematic requires a method to reduce the cylinder pressure (retract) as well as to increase the cylinder pressure above hydrostatic pressure (expand). A simple element for this feature is using a hydraulic motor instead of the commonly used hydraulic pump powered by an electrical motor. The hydraulic motor allows to reverse flow and pressure and hence allows to expand and retract a single acting hydraulic piston as if it was a double acting one. This feature eliminates multiple hydraulic elements and hence increases the reliability and decreases the cost.

Description:

Typically those double acting cylinders feature complex hydraulic schematics to actuate and control the movement like displayed in the attached. Additionally hydraulic lines have to be provided to either side of the cylinder. Looki...