Specializing in hydraulic oil testing, there is a certain degree of technical experience in hydraulic oil detection. Hydraulic oil is the use of hydraulic fluid pressure medium of the hydraulic system can be used, plays energy transfer system lubrication, corrosion, rust, cooling and other effects in the hydraulic system. For hydraulic fluids, the first hydraulic device should meet at operating temperature and the viscosity of the liquid temperature at startup requirements, changes in the viscosity of the hydraulic oil is directly related to the operation, the transmission efficiency and transmission accuracy, but also on the requirements of viscosity-temperature properties of the oil and shear stability should meet the various needs of different uses proposed.

  Automotive and construction machinery hydraulic system using hydraulic oil as the working medium, such a hydraulic system flow rate and higher pressure fluid is unlikely, it is known as hydrostatic transmission. Hydraulic oil will affect the quality of the merits of the reliability and service life of the hydraulic system to a large extent.

Hydraulic oil quality requirements are as follows:

1, Suitable viscosity and good viscosity-temperature performance, to ensure accurate, sensitive and transmitted power at the operating temperature conditions change, and to ensure the normal lubrication of hydraulic components.

2, Have good rust and oxidation stability, under the condition of high temperature and high pressure is not easy oxidation, long service life.

3, It has a good anti-foam, so that the oil under constant stirring by mechanical working conditions, the resulting foam tends to disappear to make eight power transmission stability, to avoid accelerating the oxidation of the hydraulic oil.

4, Good anti-emulsification can be quickly separated from the water mixed with oil to form an emulsion in rabbits cause the hydraulic system and lower metal corrosion effect.

5, Good wear extreme pressure to ensure that the hydraulic pumps, hydraulic motors, control valves and cylinders in the friction normal lubrication at high pressure, high-speed harsh conditions, reducing wear and tear. In addition to the basic quality requirements, performance requirements for some special hydraulic oil there are special requirements. Such as low temperature hydraulic oil is required to have good low temperature performance; fire resistant hydraulic oil requires a good fire-resistant properties; silver anti-hydraulic oil can be used with silver parts of the hydraulic system.

Quality Inspection of hydraulic oil mainly in the following items:

(1) The viscosity to be strict inspection.Viscosity will increase power loss, viscosity starts to affect the wear and caused the internal leakage of the pump increases, the system pressure drop.

(2) A viscosity index different environments have different requirements, usually fixed indoor hydraulic system oil viscosity index of 90 or more can; cold zone and the mobile device used by the fluid having a viscosity greater than 130.

(3) the water content of the film of water damage, reduce lubricity, exacerbate the wear of the friction member to pay, can react with the oil to form acids, gum and sludge water precipitate oil additives, reduce the use of oil performance, low temperature so that when the oil fluidity, corrosion, corrosion of metal materials equipment.

(4) Anti-foam hydraulic oil during operation will be mixed with air, the system efficiency drops, and even cause equipment damage, thus requiring hydraulic oil with good anti-foam properties.

(5) pour point for use in cold regions hydraulic oil, to have a good low temperature performance. Pour point is the main measure. In the selection of lubricants, generally used than the pour point lower ambient temperature of 10-20 ° C oil.