Hydraulic oil is the hydraulic medium that provides hydraulic pressure energy in the hydraulic system. In the hydraulic system, it mainly plays the role of energy transmission, anti-wear, system lubrication, anti-corrosion, rust prevention, cooling and so on. The quality of hydraulic oil determines whether the hydraulic excavator can operate normally. Firstly, the hydraulic oil shall meet the requirements of the hydraulic device for liquid viscosity under the working temperature and starting temperature. There are many kinds of hydraulic oil and different classification methods. It is customary to classify according to the purpose, or according to the oil type, chemical composition or flammability. Therefore, if you choose the right hydraulic oil, it is very important for the excavator. This article will summarize some matters needing attention in selecting hydraulic oil for reference only.
1. Hydraulic pump is one of the most sensitive components to the viscosity and viscosity temperature performance of hydraulic oil. Therefore, the requirements of pumps for hydraulic oil in the system are often taken as an important basis for selecting hydraulic oil.
2. System working conditions. The higher the requirements for the speed, system pressure and action accuracy of the actuator, the higher the requirements for the wear resistance and bearing capacity of the hydraulic oil used.
3. Oil tank size. The smaller the oil tank, the higher the requirements for oil oxidation safety, extreme pressure and wear resistance, air release and filtration.
4. Ambient temperature. When selecting hydraulic oil, if there is no open fire nearby and the working temperature is below 60 ℃, the load is light, ordinary hydraulic oil can be selected. If the equipment must be started at a very low temperature, low-temperature hydraulic oil must be selected.
