structural composition

Cylinder and cylinder head: The cylinder is the main part of the hydraulic cylinder, and the cylinder head forms a closed chamber to push the piston to move. There are 8 types of cylinder structures commonly used, which are usually selected according to the connection form between the cylinder and the end cover. The cylinder head is installed at both ends of the hydraulic cylinder and forms a tight oil chamber with the cylinder. The connection methods include welding, threads, bolts, keys and pull rods. It needs to be selected according to factors such as working pressure, the connection method of the cylinder, and the use environment.

Piston and piston rod: The piston is the main component that converts hydraulic energy into mechanical energy. Its effective working area directly affects the force and movement speed of the hydraulic cylinder. The piston and the

piston rod are connected in various forms such as snap ring type, shaft sleeve type and nut type. The piston rod is the main component of the transmission force of the hydraulic cylinder. The material is generally medium carbon steel. When working, it is subject to thrust, tension or bending moment, etc., and its surface roughness, straightness and roundness are required.

Sealing device: to prevent oil leakage to the outside of the hydraulic cylinder or leakage from the high pressure chamber to the low pressure chamber, a sealing device is arranged between the cylinder and the end cover, the piston and the piston rod, the piston and the cylinder, and the piston rod and the front end cover.

Buffer device: The piston and piston rod have a lot of momentum when they move under hydraulic force. When they enter the end cover and bottom part of the cylinder, they will cause mechanical collisions, generating impact pressure and noise. The buffer device can avoid such collisions. Its working principle is to convert the kinetic energy of the oil in the low-pressure chamber of the cylinder into heat energy through throttling, and then carry the circulating oil to the outside of the hydraulic cylinder.

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