Telescopic Design: Telescopic hydraulic cylinders consist of multiple nested cylindrical sections, or stages, that extend and retract to provide varying levels of stroke length.
The telescopic design allows for a compact retracted length while providing an extended stroke when needed.
Materials: Typically, these cylinders are constructed from high-strength steel to withstand heavy loads and harsh operating conditions. The choice of materials ensures durability and longevity.
Bore Diameter and Stroke Length:
Bore Diameter: The bore diameter of a telescopic hydraulic cylinder for a dumper truck is a critical specification. It determines the cylinder's lifting capacity and speed. Dumper trucks commonly employ cylinders with bore diameters ranging from 4 to 12 inches, depending on the size and capacity of the truck.
Stroke Length: The stroke length defines the distance the cylinder can extend and retract. It varies based on the specific requirements of the dumper truck model but typically ranges from 120 to 180 inches.
Pressure Rating and Working Pressure:
Pressure Rating: Telescopic hydraulic cylinders are designed to handle high-pressure hydraulic fluids. Pressure ratings can range from 2,500 to 5,000 PSI (pounds per square inch) or even higher, depending on the application.
Working Pressure: The working pressure represents the maximum pressure the cylinder can handle during normal operation. It is crucial to stay within the specified working pressure range to ensure safe and efficient performance.
Seals and Rod Surface Treatment:
Seals: High-quality seals are essential to prevent hydraulic fluid leaks and maintain the integrity of the hydraulic system.
Telescopic cylinders often feature multiple seal sets at each stage to ensure a reliable seal throughout the cylinder's movement.
Rod Surface Treatment: The rod surface is usually hardened and chrome-plated to resist wear and corrosion, enhancing the longevity of the cylinder.
Telescopic hydraulic cylinders are available with various mounting options to accommodate different dumper truck configurations. Common mounting styles include pin-eye, trunnion, and cross-tube mounts, allowing for flexibility in installation.
Safety is paramount in dumper truck operations. Telescopic hydraulic cylinders may incorporate safety features such as check valves to prevent unintended cylinder movement and load-holding valves to secure the dumper body in the raised position.