The heat is caused by the different flow velocity of each part in the flow process of the force transmitting medium, which causes a certain internal friction inside the liquid, and there is also friction between the liquid and the inner wall of the pipeline, which are the reasons for the increase of the temperature of the hydraulic oil. An increase in temperature will result in increased internal and external leakage, reducing its mechanical efficiency. At the same time, due to the higher temperature, the hydraulic oil of the hydraulic cutting machine will expand, resulting in an increase in compressibility, so that the control action cannot be transmitted well.
Solution: Fever is an inherent feature of hydraulic systems. It cannot be eradicated and can only be minimized. The use of good quality hydraulic oil and hydraulic piping should avoid the occurrence of elbows, use high quality pipelines, pipe joints, hydraulic valves, etc.