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How to solve the problem that the oil temperature of the four-column hydraulic is too high

by:WORLD     2022-09-29
During the working process of the four-column hydraulic press, the safety hazard of excessively high oil temperature in the hydraulic system is prone to occur, causing safety accidents. This situation should be avoided.








The danger of high oil temperature in the hydraulic transmission system of the four-column hydraulic press:

1. Because the oil temperature is too high, the viscosity of the hydraulic oil of the four-column hydraulic press decreases, resulting in an increase in leakage, which in turn reduces the capacity efficiency, and even endangers all normal movements at work.



2. If the oil temperature of the hydraulic system of the four-column hydraulic press is too high, the hydraulic oil will be mildewed, which will cause the air to oxidize and produce chemical substances, which will block the small round holes or gaps of the hydraulic system components of the four-column hydraulic press, so that the components cannot work normally.



3. The high oil temperature of the hydraulic system may cause thermal deformation of the hydraulic four-column hydraulic press or mechanical equipment, and destroy its original precision.












The reasons for the high oil temperature of the hydraulic transmission system of the four-column hydraulic press:

1. Poor heat dissipation of the heat pipe in the hydraulic system of the four-column hydraulic press

When the design scheme is adopted, the design of the hydraulic system oil tank is very small, which leads to the hydraulic oil circulation system being too fast or the cooling tower is selected due to the high working temperature, but the actual effect of the cooling tower is poor. This is all due to the poor heat dissipation of the heat pipe.



2. The unloading control circuit of the hydraulic system of the four-column hydraulic press is not good

Generally, the pressure relief valve is set at the pump inlet and outlet of the hydraulic system. When the hydraulic system of the four-column hydraulic press is not loaded with no pressure oil, the hydraulic system is unloaded to reduce the kinetic energy damage. If the pressure relief valve does not work well, the hydraulic oil still overflows from the speed control valve to the hydraulic system oil tank of the four-column hydraulic press when the working pressure oil is not used, which will cause the oil temperature to be high.



3. Impact during speed regulation and reversing.



4. The leakage of the hydraulic system of the four-column hydraulic press is relatively serious

Most people think that it has nothing to do with the temperature rise. Everyone knows that the leakage of the hydraulic system of the four-column hydraulic press will lead to kinetic energy damage. What is this kinetic energy damage converted into? In fact, they are all converted into heat energy, which in turn increases the oil temperature. .



5. Gas or water enters into the hydraulic oil of the four-column hydraulic press

When the hydraulic oil pump of the four-column hydraulic press converts the hydraulic oil into the working pressure oil, if there is gas and moisture, the calorific value will increase and cause overheating.



6. Misuse of hydraulic oil with high viscosity or increase in volume of hydraulic oil

The air oxidation of the hydraulic oil or the low working temperature will increase the viscosity, and the hydraulic oil with high viscosity will expand the friction and cause heat to generate heat.












The solution for the high oil temperature of the hydraulic transmission system of the four-column hydraulic press:

1. Design a four-column hydraulic oil tank with sufficient size, and modify the cooling tower if necessary. If the surrounding working temperature is too high, the four-column hydraulic press hydraulic system needs to be isolated from the outside; strictly control the hydraulic system temperature within the range of 20-60 °C, and the maximum cannot exceed 70°C.



2. When the hydraulic oil of the four-column hydraulic press overflows from the overflow valve to the oil tank, the design scheme should be improved, and the variable piston pump or an appropriate unloading method should be selected.



3. The hydraulic system pipeline of the four-column hydraulic press should be reduced as much as possible, and it is not suitable for excessively slender and bent, so as to make the hydraulic oil commodity flow as smoothly as possible.



4. The oil pump of the hydraulic system and the areas where the joints are very easy to leak should improve the sealing performance, and tighten the joints to prevent the capacity from being damaged and hot.



5. When the adjustment value of the pressure reducing valve of the four-column hydraulic press is high, it is better to reduce the working pressure to reduce the excess kinetic energy loss.



6. Use hydraulic oil with suitable viscosity.

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