How to avoid high oil temperature of hydraulic cylinder

How to avoid high oil temperature of hydraulic cylinder

The working temperature of hydraulic cylinder oil is generally better in the range of 30 degrees to 80 degrees. Too high oil temperature will have a series of bad effects on the system, such as viscosity decrease, leakage increase, volume efficiency decrease, resulting in unstable hydraulic speed, resulting in changes in the gap between the motion amplitude of different thermal expansion coefficients, and possible jamming, etc., which will cause oil deterioration and aging of seals. Loss of sealing performance, etc.

There are many reasons for the oil temperature rise of the hydraulic cylinder, such as the tank volume is too small, the cooling area is not enough, the oil storage amount of the tank is too little, the ambient temperature is high, and the cooler function fails; There is no unloading circuit in the system, and the oil pump is still overflow at high pressure when it stops working; The pipe is too thin and too long, the bending is too much, the pressure loss is too large, the component processing accuracy is not high, and the relative moving parts friction heat is too much.

From the perspective of use and maintenance, the following issues should be noted:

1, often maintain the correct oil level in the tank, so that the oil has sufficient circulation cooling oil;

2. Always keep the water in the cooler sufficient and the pipeline smooth;

3, when the system does not work, the oil pump needs to be unloaded;

4, the correct choice of the viscosity of the hydraulic cylinder oil.