SIDI telescopic multistage sleeve hydraulic cylinder is a hydraulic cylinder with multistage sleeve piston rod that can get a longer working stroke, and the telescopic hydraulic cylinder is also known as the telescopic sleeve hydraulic cylinder or multistage hydraulic cylinder.

The telescopic hydraulic cylinder is composed of two or more piston hydraulic cylinders, and the piston rod of the first piston cylinder is the cylinder of the second piston cylinder.

When the pressure oil enters from the rodless cavity, the cylinder with the largest effective area of the piston begins to extend, and when the line reaches the end, the cylinder with the second effective area of the piston begins to extend.

The extension order of the telescopic hydraulic is extended from large to small, which can obtain a long working stroke. The smaller the effective area of the overstretched cylinder, the faster the extension speed.

Therefore, the extension speed is slow and fast, and the corresponding hydraulic thrust decreases from large to small; This change law of thrust and speed is suitable for the requirements of various automatic loading and unloading machinery for thrust and speed.

The order of retraction is generally from small to large, and the axial length of the retraction is short, the space is small, and the structure is compact.