Product Details
Function
The core hydraulic execution unit that drives the multi section extension and contraction of the crane arm, achieving dynamic adjustment of arm length and load support
Cylinder diameter
φ 80-240 mm
Advantages and Characteristics
Precision synchronous control:
Using built-in displacement sensors and proportional valve group closed-loop control, the synchronization error of multi arm extension and contraction is ≤ 1.5mm (when the arm length is 20 meters), combined with mechanical synchronization mechanism to achieve "zero displacement" extension and contraction, avoiding structural damage caused by arm interference.
Anti eccentric load design:
The cylinder barrel adopts 42CrMo forging+honing process, and the surface of the piston rod is plated with hard chromium and polished with a mirror finish. With the anti eccentric load guide sleeve, it can withstand eccentric load torque within 3 ° and adapt to complex lifting posture.
Long life wear-resistant structure:
The sealing system is made of polyurethane+fluororubber composite material, with a temperature resistance of -40 ℃~+120 ℃. Combined with phosphating treatment on the inner wall of the cylinder, it has a service life of ≥ 150000 cycles in harsh environments such as sand, dust, salt spray, etc. (calculated based on 100 expansion and contraction cycles per day, it can be used for 4 years).
Multiple security measures:
Equipped with a built-in balance valve and dual hydraulic locks, the arm joint position is locked in case of sudden pressure loss to prevent the crane arm from falling freely;
The cylinder head is equipped with buffer damping holes, and the end expansion speed automatically decreases to 0.1m/s to reduce impact vibration;
External integrated pressure sensor, real-time monitoring of cylinder pressure, linked hydraulic system unloading in case of overpressure, to avoid the risk of cylinder explosion.
