Hydraulic system (hydraulic), harm and prevention of excessive oil temperature

Hydraulic system (hydraulic), harm and prevention of excessive oil temperature

1. hydraulic oil viscosity

Hydraulic oil viscosity varies with temperature, high temperature hydraulic oil viscosity will decrease, prone to leaks, the volumetric efficiency decreases. Meanwhile, poor lubricating properties, resulting in wear or even fired.

2. in part due to overheating of the hydraulic station and expansion

Because of the linear expansion coefficient of the various components of the system, heating and cooling conditions vary, each part thermal expansion are not exactly the same, thus producing different variants of, are likely to undermine the relative motion of the parts that the normal clearance, resulting in increased friction, the valve core jamming. Meanwhile, high temperature lubricant film thins, increased mechanical wear, resulting in precise mating surface due to premature wear of components and unserviceable or obsolete.

3. the destruction of oil oxidation stability and thermal stability

Oxidation stability: refers to liquid resistance and oxygen (especially air) ability to react. Thermal stability: ability to resist chemical reactions is liquid at high temperature. In the fluid due to heat, oxygen, and metals and oxidizing, make the oil go bad. When temperature, pressure, and speed will accelerate oxidation, oxidation of generated material increases the corrosion of metals.