Measures to reduce hydraulic shock
(1) Extend valve closing and reversing braking time of moving parts
When the valve is closed and the reversing braking time of the moving parts is greater than 0.3 s, the hydraulic shock is greatly reduced. In order to control the hydraulic shock, a reversing valve with adjustable commutation time can be used. The use of a damped electro-hydraulic directional control valve can reduce the commutation (shutdown) speed of the main reversing valve spool by adjusting the damping and controlling the pressure and flow through the pilot valve. The hydraulic directional control valve is similar.
(2) Limiting the flow rate of liquid in the pipe and the speed of moving parts
The hydraulic system of the machine tool often limits the flow rate of the liquid in the pipeline to less than 5.0 m/s, and the speed of the moving parts is generally less than 10 m/min.
(3) Properly increase the inner diameter of the pipe or use a rubber hose
It can reduce the velocity of the pressure shock wave in the pipeline, and increase the inner diameter of the pipeline can also reduce the flow velocity of the liquid, and the corresponding instantaneous pressure peak will also decrease.
(4) Install an accumulator near the hydraulic shock source
The time during which the pressure shock wave reciprocates is shorter than the valve closing time, and the hydraulic shock is reduced.