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[CN 201710673786.7] Hydraulic system for leveling beam of large hydraulic press
[CN 201710673786.7] Title of a large hydraulic machine beam leveling hydraulic system: Application number of a large hydraulic machine beam leveling hydraulic system: CN 201710673786.7 Applicant: Jiangsu Institute of Technology Application Date: 2017-8-9 Patent Type: Invention Application The present invention discloses a large hydraulic machine beam leveling hydraulic system, including an active control hydraulic system and a passive control hydraulic system. The active control hydraulic system consists of a main cylinder and four auxiliary hydraulic cylinders, the auxiliary hydraulic cylinder is supplied by the first hydraulic pump, the first hydraulic pump is connected with the oil tank through a pipeline, the outlet of the first hydraulic pump is connected with the first cartridge valve through a pipeline, the remote control port of the first cartridge valve is connected with the two-position three-way solenoid valve through a pipeline, and the outlet of the first hydraulic pump is connected with the inlet of the third cartridge valve through a pipeline. Through the active control hydraulic system and passive control hydraulic system and PLC controller, the active control hydraulic system is the plunger cylinder in the middle, and the remaining four cylinders are piston cylinders. Each cylinder is driven by a pump alone. The controller controls the speed of each pump to change the flow rate, so as to realize the needs of different speeds such as rapid decline, pressing workpiece and holding pressure.
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