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[CN 201621280196.5] Main hydraulic system of mechanical press
[CN 201621280196.5] Title of main hydraulic system of a mechanical press: Application number of main hydraulic system of a mechanical press: CN 201621280196.5 Applicant: Dalian Design and Research Institute Co., Ltd. of Yizhong Group; China First Heavy Machinery Co., Ltd. Application Date: 2016-11-24 Patent Type: Utility Model The utility model discloses the main hydraulic system of a mechanical press, including plunger pump oil suction filter, gear pump oil suction filter, motor, double pump, two-stage valve, electromagnetic overflow valve, double-cylinder filter, accumulator, lower mold clamp electromagnetic directional valve, Overload protection electromagnetic directional valve, workbench clamping electromagnetic directional valve, hydraulic control check valve and workbench jacking electromagnetic directional valve; the electromagnetic directional valve of the lower mold clamp is a three-position electromagnetic directional valve with Y-shaped middle function. The utility model adds an accumulator and an electromagnetic overflow valve, and changes the electromagnetic directional valve of the lower mold clamp into a three-position electromagnetic directional valve with Y-type middle function. When each actuator needs to maintain pressure after the action is completed, the accumulator is used to maintain the pressure. After the high and low pressure double pump is unloaded with no load through the electromagnetic overflow valve, the double pump motor is powered off and stopped, thereby reducing the heat of the system, reducing the energy consumption of the hydraulic system, improving the energy utilization rate, and achieving the purpose of energy saving and environmental protection.
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