The basic principle of four pillar hydraulic press machine is the oil pump to delivery the hydraulic oil to the integrated cartridge valve block, the hydraulic oil will be distributed to the upper or lower chamber through the one-way valve and the relief valve, the cylinder will move under the action of high pressure oil. The four column hydraulic press machine is the device to use of liquid to transmit the pressure. The liquid follows the Pascal's law when the fluid is delivered in a closed container. The hydraulic drive system of the four-column hydraulic press consists of the power system, the control system, the implementing system, the auxiliary system and the working medium. The power system is usually adopt oil pump as power system. In order to meet the requirements of the speed of the implementing system, the machine use one or several oil pumps: 1. Low pressure (oil pressure less than 2.5MP) use gear pump; 2. Medium pressure (o...
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