How to solve the unstable pressure of the hydraulic pad of the 1600 ton hydraulic press, the floatin

1. The relief valve is aging and replaced with a new one.

2. If you use a variable pump, it may be a problem with the pump, and the flow is unstable due to serious wear.

3. If you use a domestic variable pump, the new one may also have the problem of unstable flow, find a manufacturer to replace it, and replace it if one does not work. Ha ha.

The pressure of the hydraulic pad has nothing to do with the relief valve and the hydraulic pump.

The pressure of the hydraulic pad is only numerical when it is stretched.

It is related to the remote pressure regulator, the sealing of the hydraulic gasket, and the pressure of the slide.

Cleaning and filtration of hydraulic oil, the oil with air consumes energy in the compression process, and makes the local temperature of the oil rise, the oil and various additives are destroyed, and the free carbon, acidic substances and cement-like precipitates are produced, which accelerates the deterioration of oil quality, and has a chemical corrosive effect on the metal at the same time. Noise, vibration and shock: When carrying bubble oil to a high pressure, the bubble is instantaneously burst to produce a lot of noise.

At the same time, a large number of bubbles are crushed, causing large pressure fluctuations, causing the system to vibrate and impact. Hydraulic oil is mixed with water and air, and the new hydraulic oil is absorbent and contains a trace amount of water; When the hydraulic system stops working, the system temperature decreases, and the water vapor in the air condenses into water molecules and mixes into the oil. After the hydraulic oil is mixed with water, it will reduce the viscosity of the hydraulic oil, and promote the oxidation and deterioration of the hydraulic oil, and will also form water bubbles, which will make the lubrication performance of the hydraulic oil worse and will also produce cavitation.

1. Internal leakage of seal in hydraulic cylinder.

2. The pressure regulator is faulty.

3. The pressure relief device is leaking or faulty.

4. Internal leakage of oil pump.

5. The filter is blocked.

6. The hydraulic control position is not in place.

When the oil pump of the hydraulic station is working, the hydraulic pipeline system should be in a pressurized state, and when the set pressure is reached, the relief valve should be opened, so that the excess pressure is discharged with the oil, and then the pressure should be kept in a state of constant condition, and the pressure should not drop slowly. If there is a phenomenon of "the pressure gauge shows a slow decrease in pressure when there is no pressure", it is extremely abnormal and it is easy to have accidents, because some work needs to be carried out in a pressure-holding state, such as hydraulic cranes often have to keep heavy objects in a stable state.

The root cause of the above phenomenon is the leakage of the hydraulic system, and it is necessary to carefully check the details of the pipeline, pipe joints, relief valves, etc., check them one by one, and eliminate them one by one.