Summarize the core structure of the hydraulic cylinder

Summarize the core structure of the hydraulic cylinder

The hydraulic cylinder is the core actuator of the hydraulic system. It drives the piston to move through the pressure of the oil, converting hydraulic energy into mechanical energy. Its core structure consists of four major parts that work precisely in coordination:

1. Cylinder barrel and cylinder head

The cylinder barrel is a high-precision processed cylindrical structure. The inner wall needs to be smooth and wear-resistant to form a closed oil cavity with the piston.

The cylinder head is connected to the cylinder barrel by bolts and is equipped with an oil inlet and an oil return port to control the flow direction of the oil.

2. Piston and piston rod:

The piston slides along the inner wall of the cylinder under the action of oil pressure, and its diameter determines the magnitude of the output force (F=P×A).

One end of the piston rod is connected to the piston, and the other end outputs linear motion. It needs to have high strength and bending resistance.

3. Sealing system:

Seals such as O-rings and Y-rings are adopted to prevent oil leakage and ensure stable pressure.

The guide belt reduces the friction between the piston rod and the cylinder head, prolonging the service life.

4. Buffer and exhaust device:

The buffer device absorbs the impact force when the piston moves to the terminal, avoiding mechanical damage.

The exhaust valve discharges the air in the oil to prevent cavitation and crawling.

Through the precise coordination of these core structures, hydraulic cylinders achieve efficient and stable energy conversion and are widely used in fields such as construction machinery, metallurgical equipment, and automated production lines. They are indispensable power cores in modern industry.