FREMGANGSMÅDE TIL AT KONTROLLERE ET HYDRAULIKSYSTEM, ET HYDRAULIKSYSTEM OG EN KRAN

• Main Author: LANAS USÁN, José Luis
• Format: Patent
• Language: Danish
• Published: 23.05.2022
• Subjects: BLASTING; CRANES; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; HAULING; HEATING; HOISTING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIFTING; LIGHTING; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; TRANSPORTING; WEAPONS

A hydraulic system for operating a working equipment, said hydraulic system comprising a set of hydraulic cylinders (5, 6, 7), each having a first port (17, 18,19) and a second port (20, 21, 22) on opposite sides of respective piston (8, 9, 10), a tank (23) for housing hydraulic fluid, a pump (24) configured to pump hydraulic fluid from the tank (23) to each cylinder, and a set of hydraulic control valves (25, 26, 27), one for each cylinder, each control valve (25, 26, 27) being configured to control a flow of hydraulic fluid from said pump (24) to one of the first port (17, 18, 19) and the second port (20, 21, 22). The hydraulic system comprises means for determining the total return flow rate from said cylinders (5, 6, 7) to the tank (23), and a control unit (28) configured to control the flow rate of hydraulic fluid to said first or second port (17-22)) of the cylinders (5, 6, 7) on basis of the determined total return flow rate, such that a predetermined return flow rate limit is not exceeded.