Hydraulic control for segmented loading of isothermal forging press

The hydraulic control device comprises an oil tank and a hydraulic machine main oil cylinder, the oil tank is provided with a micro-speed servo pump set, a series servo pump set and a main servo pump set, the main servo pump set is connected with an electro-hydraulic directional control valve, one p...

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Bibliographische Detailangaben
Hauptverfasser:	ZENG BING, LING JIAYOU, XIONG YONG, REN YUANPENG, JIANG LIUBAO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS HEATING HYDRAULICS OR PNEUMATICS IN GENERAL LIGHTING MECHANICAL ENGINEERING SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	The hydraulic control device comprises an oil tank and a hydraulic machine main oil cylinder, the oil tank is provided with a micro-speed servo pump set, a series servo pump set and a main servo pump set, the main servo pump set is connected with an electro-hydraulic directional control valve, one path of the electro-hydraulic directional control valve is connected with an upper cavity of the hydraulic main oil cylinder, and the other path of the electro-hydraulic directional control valve is connected with a lower cavity of the hydraulic main oil cylinder. The other path of the electro-hydraulic directional control valve is connected with a lower cavity of the hydraulic main oil cylinder through a first-stage lower cavity supporting stop valve; the series servo pump set is connected with the electromagnetic reversing valve, one path of the electromagnetic reversing valve is connected with an upper cavity of the hydraulic main oil cylinder, and the other path of the electromagnetic reversing valve is connecte