Hydraulic cylinder hydraulic cylinder structure description

- Apr 28, 2018 -

Piston type

A single rod hydraulic cylinder only has a piston rod at one end. The figure shows a single-piston hydraulic cylinder. Both ends of the import and export of oil port A and B can pass the pressure oil or return oil to achieve two-way movement, it is called double-acting cylinder.


2. Piston type

(1) The plunger-type hydraulic cylinder is a type of single-acting hydraulic cylinder, which can only realize the movement in one direction by the hydraulic pressure. The return stroke of the plunger depends on the weight of the other external force or the plunger.

(2) The plunger is only supported by the cylinder liner and not in contact with the cylinder liner, so the cylinder liner is easy to process, so it is suitable for long stroke hydraulic cylinders;

(3) The plunger is always under pressure during operation, so it must have sufficient rigidity;

(4) The weight of the plunger is often large, and it is prone to sagging due to its own weight when placed horizontally, resulting in unilateral abrasion of the seal and guide, so its vertical use is more favorable.


3. Telescopic

Telescopic hydraulic cylinders have two or more stages of pistons. The pistons in the telescopic hydraulic cylinders extend from the largest to the smallest, while the order of the no-load retraction is generally from small to large. Telescopic cylinders allow longer strokes, shorter lengths when retracted, and a more compact structure. Such hydraulic cylinders are commonly used in construction machinery and agricultural machinery.


4. Oscillating

Swing hydraulic cylinder is the actuator that outputs torque and realizes reciprocating motion. It is also called swing hydraulic motor. There are two types of single blade and double blade. The stator block is fixed on the cylinder block, and the blades and the rotor are connected together. According to the direction of oil intake, the blades will drive the rotor to swing back and forth.


  • Multi-function Hydraulic Power Station
  • High Pressure Hydraulic System
  • Frequency-Conversion Hydraulic Power Station
  • Small Hydraulic Station
  • Small Hydraulic Power Pack
  • Auxiliary Support Nut for Fixture

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