Fault one: the hydraulic system of the hydraulic bending machine has no pressure
1. Whether the solenoid coil of the proportional relief valve is powered and whether the voltage of the proportional solenoid coil meets the requirements. For the above reasons, please check the relevant electrical reasons.
2. Check whether the cartridge valve is stuck or the main valve spool is stuck, and the damping hole is blocked. If it is for the above reasons, please remove the relief valve and clean it and reinstall it.
3, three-phase power supply phase adjustment, resulting in motor reversal.
Fault two: hydraulic bending machine slider fast slow speed, the pause time is too long.
1. Check whether the oil level of the oil tank is too low, the filling port is not flooded, and the filling cavity of the upper chamber of the cylinder is empty due to insufficient filling liquid during fast forward. For the above reasons, the oil in the tank can be added to more than 5mm above the filling port to completely drown the filling hole.
2. Check whether the fast forward speed is too fast, causing insufficient liquid filling. For the preceding reasons, modify system parameters to reduce the fast forward speed.
3. Check whether the filling valve is fully opened. If it is because of oil pollution, the spool activity of the filling valve is not flexible and the phenomenon of stagnation causes insufficient filling. The filling valve needs to be cleaned and reinstalled to make the spool flexible and free.
Fault three: hydraulic bending machine slider return normal, normal fast forward, manual can not slow down, folding plate weakness.
1. Check whether the "two-position four-way" directional valve that controls the filling control oil circuit works normally. If so, the filling valve is not closed, so that the upper chamber is communicated with the filling port of the oil tank, and the pressure cannot be built. The reason why the valve cannot work properly is that it is not energized or stuck.
2. Check whether the filling valve is stuck. If so, clean the filling valve and reinstall it to make the spool flexible and free.
Fault four: hydraulic bending machine slider return speed is too slow, return pressure is high.
The main fault is that the liquid filling valve is not opened, which is the opposite of the logical relationship of fault 3. You can handle the fault by referring to the solution of fault 3.
