How does the hydraulic press work
working principle
200-ton hydraulic press for sale, the working principle of the hydraulic press. The areas of the large and small plungers are 2, 1, respectively, and the forces on the plungers are 2, 1, respectively. According to Pascal’s principle, the pressure of a closed liquid is equal everywhere, that is, 2/2=1/1=p; 2=1(2/1). It indicates the gain effect of hydraulic pressure. Like mechanical gain, the force increases, but the work does not gain. Therefore, the movement distance of the large plunger is 1/2 times the movement distance of the small plunger.
200-ton hydraulic press for sale, The basic principle is that the oil pump delivers the hydraulic oil to the integrated cartridge valve block, and distributes the hydraulic oil to the upper or lower cavity of the cylinder through various one-way valves and overflow valves, and makes the cylinder move under the action of high-pressure oil. It is a device that uses liquid to transmit pressure. When the pressure of the liquid transfer in a closed container, it follows Pascal’s law. The hydraulic transmission system of a four-column hydraulic press consists of a power mechanism, a control mechanism, an executive mechanism, an auxiliary mechanism, and a working medium. The power mechanism usually uses an oil pump as the power mechanism, which is generally a product oil pump. In order to meet the requirements of the movement speed of the actuator, one oil pump or multiple oil pumps are selected. Gear pumps for low pressure (oil pressure less than 2.5MP); vane pumps for medium pressure (oil pressure less than 6.3MP); plunger pumps for high pressure (oil pressure less than 32.0MP). Pressure processing and forming of various plastic materials, such as extrusion, bending, stretching of stainless steel plates and steel plates, and cold forming of metal parts. It can also be used for pressing powder products, grinding wheels, bakelite, and resin thermosetting products.
working medium
200-ton hydraulic press for sale, The function of the working medium used in the hydraulic press is not only to transmit the pressure but also to ensure that the working parts of the machine are sensitive, reliable, long-lived, and less leaking. The basic requirements of hydraulic press for working medium are ① suitable fluidity and low compressibility to improve transmission efficiency; ② anti-corrosion; ③ good lubrication performance; ④ easy to seal; ⑤ stable performance, long-term work Without deterioration. The hydraulic press uses water as the working medium at first, and later it is changed to an emulsion made by adding a small amount of emulsified oil to the water to increase lubricity and reduce rust. In the late 19th century, hydraulic presses using mineral oil as the working medium appeared. The oil has good lubricity, anti-corrosion, and moderate viscosity, which is conducive to improving the performance of the hydraulic press. In the second half of the 20th century, a new type of water-based emulsion appeared, and its emulsified form was “water-in-oil” instead of the original “oil-in-water”. The outer phase of the “water-in-oil” emulsion is oil. Its lubricity and corrosion resistance is close to the oil, and its oil content is small, so it is not easy to burn. However, water-based emulsions are more expensive, which limits its promotion.
