液压油是液压传动与控制系统中用来传递能量的工作介质，同时具有润滑机械、

Hydraulic oil is the working medium used to transmit energy in the hydraulic transmission and control system. It also has the functions of lubricating machinery, reducing friction and wear, preventing mechanical rust and corrosion, sealing, cooling, washing and so on. It is usually prepared by adding deeply refined petroleum lubricating base oil or synthetic lubricating oil to anti-wear and antioxidants. For hydraulic oil, first of all, it should meet the requirements of the hydraulic device for the viscosity of the liquid at the working temperature and the starting temperature. Since the viscosity change of the lubricating oil is directly related to the hydraulic action, transmission efficiency and transmission accuracy, the viscosity-temperature performance of the oil is also required And the shear stability should meet the various needs raised by different uses.

液压油是液压传动与控制系统中用来传递能量的工作介质，同时具有润滑机械、减少摩擦磨损、防止机械锈蚀和腐蚀、密封、冷却、冲洗等作用。通常由深度精制的石油润滑油基础油或合成润滑油加入抗磨和抗氧剂等调制而成。对于液压油来说，首先应满足液压装置在工作温度下与启动温度下对液体粘度的要求，由于润滑油的粘度变化直接与液压动作、传递效率和传递精度有关，还要求油的粘温性能和剪切安定性应满足不同用途所提出的各种需求。

Hydraulic oil is the working medium used to transfer energy in the hydraulic transmission and control system. It also has the functions of lubricating machinery, reducing friction and wear, preventing machinery from corrosion and corrosion, sealing, cooling, flushing, etc. It is usually prepared by adding antiwear and antioxidant into the base oil or synthetic oil of refined petroleum lubricating oil. For hydraulic oil, first of all, it should meet the requirements of the hydraulic device on the viscosity of the liquid under the working temperature and the starting temperature. Since the viscosity change of the lubricating oil is directly related to the hydraulic action, transfer efficiency and transfer accuracy, it is also required that the viscosity temperature performance and shear stability of the oil should meet the requirements of different purposes.<br>