Source：Shuntec Update：2022-04-09-08:48:57Views：104
The speed control circuit commonly used in the hydraulic speed control system of the four-column hydraulic press has a step-less speed control circuit. The different speed control methods can be divided into a saving speed control circuit and a volume speed control circuit.
1. Save the speed control system. According to the system of changing the valve opening of the flow control element of the four-column hydraulic press to achieve the purpose of speed regulation, it can be divided into the saving valve is installed in the oil inlet circuit; the saving valve device, and the oil return circuit; the saving valve is installed in the branch oil circuit.
2. Volume speed control system. According to the system of changing the displacement of the hydraulic pump or the hydraulic motor of the four-column hydraulic press to achieve the purpose of speed regulation. They are variable pump – hydraulic cylinder system; variable pump – variable hydraulic motor system; quantitative pump – variable hydraulic motor system; variable pump – quantitative hydraulic motor system.
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