Hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swing motion). It has a simple structure and reliable operation. When using it to achieve reciprocating motion, there is no need for a deceleration device, and there is no transmission clearance, making the motion smooth. Therefore, it is widely used in various mechanical hydraulic systems.

The lining on the inner wall of the cylinder body is mainly used to protect the cylinder and reduce friction damage with the piston. In addition, the use of the cylinder body lining also simplifies the structure and manufacturing process of the cylinder. During maintenance, only the worn lining needs to be replaced, without the need to replace the cylinder as a whole.

Hydraulic cylinders are the main components of construction machinery. During use, faults are often caused by seal wear, cylinder barrel wear, inner wall scratches, inner wall corrosion, piston or piston rod scratches, etc. The sealing performance of hydraulic equipment's execution components coated with pressure cylinders directly affects the performance of the equipment. Therefore, the copper sleeve of hydraulic cylinders needs to meet basic conditions such as wear resistance and corrosion resistance, and tin bronze is more suitable.