four-column hydraulic pressIt is a device that uses liquid to transmit pressure: when liquid transmits pressure in a closed container, it follows Pascal's law. The hydraulic transmission system of hydraulic equipment is composed of power mechanism, control mechanism, actuator, auxiliary mechanism and working medium.
The power mechanism usually uses an oil pump as the power mechanism, generally a volumetric oil pump. In order to meet the requirements of the speed of the actuator, one or more oil pumps are selected. Gear pump for low pressure (oil pressure less than 2.5MP); vane pump for medium pressure (oil pressure less than 6.3MP); plunger pump for high pressure (oil pressure less than 32.0MP).
The four-column hydraulic press is composed of two cylinders of different sizes, which are filled with water or oil. The water-filled is called "hydraulic press"; the oil-filled is called "hydraulic press".
Each of the two liquid cylinders has a sliding piston. If the pressure is added to the small piston, according to Pascal's law, the small piston transmits this pressure to the large piston through the pressure of the liquid, and the large piston is pushed up. Let the cross-sectional area of the small piston be S1, and the downward pressure on the small piston be F1.
Thus, the small piston pair can be transferred in all directions by the liquid with the same size ". The pressure on the large piston must also be equal to P. If the cross-sectional area of the large piston is S2, the upward pressure generated by the pressure P on the large piston is a multiple of the cross-sectional area of the small piston. From the above, if you add a small force to the small piston, you will get a lot of force on the large piston. For this reason, hydraulic press is used to press plywood, press oil, extract heavy objects, forge steel, etc.