The performance characteristics of the hydraulic cylinder cylinder

According to the law of flow continuity, into the liquid flow rate is equal to the flow of the hydraulic cylinder cylinder cross section and the product of the velocity, and cylinder liquid flow section is the effective area of piston, the average flow velocity is the rate of movement of the piston. The structure of the hydraulic cylinder cylinder basically can be divided into cylinder and cylinder head, piston and piston rod, sealing device, the buffer device and exhaust system five parts, the points mentioned below. Generally speaking, the structure of cylinder and the cylinder head with its materials used. Screwed connection structure is simple, convenient installation, but under the high pressure large load should be equipped with nut locking device. Half ring connection structure more complex, inconvenient installation, but work is more reliable. In addition, the piston and piston rod has made integral structure, but it is only applicable to small size. General made of wear resistant cast iron piston, piston rod, whether it's hollow or solid, are made of steel material. Gap seal, it relies on the tiny gap between moving parts to prevent leakage. In order to improve the sealing ability of the device, usually on the surface of the hydraulic cylinder piston cylinder making a few small circular groove, in order to increase the oil through the clearance of resistance. It has simple structure, small frictional resistance, resistant to high temperature, but the leak is big, high processing requirements, unable to restore the original after wear ability, only in small size, low pressure and high relative speed between the cylinder and piston to use.