High Pressure Hydraulic Oil HM46#

Hydraulic transmission is the use of liquid as the transmission medium, the use of liquid pressure energy or kinetic energy to transfer energy. Usually the hydraulic medium used by the hydraulic system using liquid pressure energy is called hydraulic oil; A fluid drive system (such as a torque converter) that uses liquid kinetic energy uses a medium called a liquid-call drive fluid.

Hydraulic transmission is the use of connecting pipe to work, and rely on the volume change in the hydraulic system to transfer the movement.

Hydraulic transmission has the characteristics of small volume, light weight and compact structure. The weight ratio of an oil pump with a rotation of 2500-3000r/m and a pressure of 20-25MPa to its power is 0.15-0.2kg per 1KW on average, while that of a DC motor is 1.5-2.0kg, indicating that the weight of the oil pump is only 10-20% of that of the motor with the same power, and the size is about 13-20%. In addition, hydraulic transmission is easy to carry out stepless speed regulation, the moment of inertia is small, sensitive response; Easy to achieve automatic operation and other features. But it also brings a lot of inconvenience and special requirements, such as the requirements of processing, use, maintenance level is high; In order to reduce the leakage and friction between the motion pairs of parts, the clearance of the parts should be small and the geometric accuracy should be high. In addition, hydraulic action is affected by hydraulic oil quality, must choose the appropriate hydraulic oil. The leakage problem of hydraulic system should be properly solved through the reasonably designed sealing element structure and the sealing material suitable for the hydraulic tank, so as to achieve the purpose of accurate hydraulic action.

In short, hydraulic oil should first meet the requirements of liquid viscosity when the hydraulic device is working temperature and starting temperature. Because the change of oil viscosity is directly related to the hydraulic action, transmission efficiency and transmission accuracy, it is also required that some viscosities should meet the various needs of different uses. In addition, the hydraulic oil should have good compatibility with the hydraulic system metal and sealing materials; Both anti-corrosion and anti-wear ability and anti-air entrainment and bubble tendency; With water separation and emulsification; Compressibility; For some special purposes, it should also have fire resistance and no pollution to the environment

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