The core feature of the telescopic hydraulic cylinder is its multi-stage sleeve structure,which allows for a long stroke(e.g.,1500mm)within a small installation space,offering a high extension ratio and saving equipment space.The cylinder tube is made from high-strength alloy steel,which,after heat treatment,exhibits excellent fatigue resistance,suitable for frequent telescoping operations.The piston rod surface is nickel-plated,enhancing corrosion and wear resistance,while the sealing system uses Polyurethane(PU),providing high elasticity and oil resistance to reduce leakage risk.Flange mounting facilitates secure fixation,suitable for applications with high bending moments.Although it has a non-cushioned design,internal guide rings optimize movement smoothness and reduce sticking.This hydraulic cylinder is lightweight(25kg)yet offers strong load capacity,with a working pressure of 160 bar,suitable for medium-pressure environments.Its modular design allows for customization of the number of stages,enhancing adaptability,and it is widely used in mobile equipment and engineering machinery.
The specifications for this telescopic hydraulic cylinder include a maximum bore of 100mm(first stage),a minimum rod diameter of 60mm(final stage),a total telescopic stroke of 1500mm,and typically 3-5 stages.The working pressure is 160 bar,with a burst pressure≥240 bar,ensuring safe operation.The maximum speed is 0.3 m/s,suitable for smooth extension and retraction.Material-wise,the cylinder tube is 42CrMo alloy steel with a hardness of HRC30-35;the piston rod is 45 steel with a nickel plating thickness of 15-25µm;seals are PU,resistant to temperatures from-40°C to 120°C;end caps are ductile iron for high impact strength.It weighs approximately 25kg,features mounting dimensions compliant with ISO 6020 standards,and has a G1/2 threaded port.With an IP66 protection rating,it is protected against powerful water jets,making it suitable for outdoor use.These specifications ensure the cylinder's stability and durability in long-stroke applications,particularly under variable load conditions.
Telescopic hydraulic cylinders are primarily used in applications requiring long strokes but with limited space.In lifting equipment,such as mobile crane booms,they enable flexible height extension to lift loads to significant heights.Dump truck body lifting systems rely on these cylinders for smooth tipping action.Lifting platforms and fire truck ladders also widely use them,as their compact design allows operation in confined spaces.In agriculture,they are used in tractor loaders to adjust bucket height.Additionally,in marine and port equipment,they are applied in cargo handling systems,with corrosion-resistant materials adapting to the marine environment.In industrial automation,telescopic cylinders control large valves for long-distance linear motion.Their high extension ratio and lightweight nature make them ideal for mobile machinery,emphasizing space efficiency and versatility.
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