Lift manufacturer interprets lift hydraulic cylinder can not drive the load reason升降机厂家解读升降机液压油缸不能驱动负载原因
Fixing is the lift hydraulic cylinder can not drive the load of the main performance of the piston rod stop inaccurate, insufficient thrust, speed decline, unstable work and so on. Then how does the lift manufacturer solve these problems? The hydraulic oil passes through the overflow valve to return to the oil tank. If the overflow valve enters the dirt and gets stuck in the valve core, making the overflow valve open normally, the hydraulic oil will flow directly back to the oil tank through the overflow valve bypass, resulting in no oil entering the hydraulic cylinder. If the load is too large, the overflow valve pressure has reached the maximum rating, but the hydraulic cylinder is still not required for continuous action of the thrust and not action. If the regulating pressure is low, the pressure is insufficient to reach the thrust required by the heavy load, which is shown as insufficient thrust. At this point, the overflow valve should be checked and adjusted.
Leakage of hydraulic circuit includes leakage of valve and hydraulic pipeline. The maintenance method is to control the reversing valve to check and eliminate the leakage of the hydraulic link pipeline.
Internal leakage of hydraulic cylinder includes leakage caused by excessive wear of hydraulic cylinder seal, piston rod and seal cover.
Piston rod and seal rod seal leakage reason is: the seal wrinkle, extrusion, tear, wear, aging, deterioration, deformation, at this time should be replaced with a new seal.
The main cause of excessive wear of piston seal is improper adjustment of speed control valve, resulting in excessive back pressure and improper installation of seals or hydraulic oil pollution. The second is the assembly of foreign body entry and sealing material quality is not good. Its consequence is the action is slow, weak, serious still can cause the damage of piston and cylinder cylinder, appear “pull cylinder” phenomenon. Treatment is to adjust the speed control valve, according to the installation instructions should do the necessary operation and improve the clear filter or replace the filter element, hydraulic oil.