Why is the oil supply pressure of the four-column hydraulic press low?

The four-column hydraulic press consists of two parts: the main engine and the control mechanism. The main part of the hydraulic press includes the body, the master cylinder, the ejector cylinder and the liquid filling device. The power mechanism is composed of oil tank, high pressure pump, low pressure control system, motor and various pressure valves and direction valves. Under the control of the electric device, the power mechanism realizes the energy conversion, adjustment and transmission through the pump and the cylinder and various hydraulic valves to complete the cycle of various process actions.

Column oil press is a kind of special hydraulic oil as the working medium

Four-column hydraulic press is a special hydraulic oil as the working medium, through the hydraulic pump as the power source, the force of the pump makes the hydraulic oil enter the cylinder/piston through the hydraulic pipeline, and then there are several groups of seals in the cylinder/piston, the seal is different in different positions, but all play the role of sealing, so that the hydraulic oil can not leak. Through the check valve, the hydraulic oil circulates in the tank, the cylinder/piston circulates and does work to complete the mechanical action as a kind of machinery for productivity. Hydraulic pressure is insufficient how to repair? Let's talk about it.

What is the reason why the oil supply pressure of a four-column hydraulic press is too low?

The main phenomenon is that when the engine throttle is fully opened, the oil pressure of the transformer is still less than the standard value, which is mainly caused by the following reasons: the oil supply is small, the oil level is lower than the oil suction port plane; Tubing leakage or blockage; Excessive oil flowing to the transmission; Pipe or oil filter screen blockage: hydraulic pump wear or damage; Improper installation of oil suction ~ mesh: oil foam, the inlet and outlet pressure valve can not be closed or the spring stiffness is reduced.

If the oil supply pressure is too low, should first check the oil level: if the oil level is lower than the low scale, should be added oil, if the oil level is normal, should check the inlet and outlet oil pipe leakage, if there is turbidity, should be excluded, if the pipe seal is good, should check the inlet and outlet pressure valve working conditions, if the inlet and outlet pressure valve can not be closed, should be removed, check its parts Cracks or scars, whether the oil circuit and oil hole are smooth and whether the spring stiffness is small, the problem should be solved in time, if the pressure valve is normal, the hydraulic press should remove the oil pipe or filter screen for inspection, if there is blockage, should be cleaned and removed sediment; If the oil pipe is smooth, it is necessary to check the hydraulic pump, replace the hydraulic pump if necessary) If the hydraulic oil foam, should check the installation of the back pipe, such as the oil level of the return pipe is lower than the oil level of the pool, should be re-installed back pipe.

Two, four column hydraulic press working pressure is insufficient how to repair

1. Check the pressure of the relief valve, adjust the pressure if the pressure is not enough, adjust it, change the relief valve, change the relief valve can not afford, it is necessary to consider cy Dookie pump

2. Pressure is normal, consider electromagnetic directional valve, unloading valve, there is no internal leakage,

3. Consider whether the filling valve has internal leakage

4. Consider whether the master cylinder has internal leakage.