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How to choose the hydraulic oil of the hydraulic system of excavator accessories?

2020-11-20 09:49:41
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According to Volvo construction machinery accessories Xiaobian understanding of the use of hydraulic oil is very wide, it is the most used product in industrial oil.For automobile and construction machinery excavator hydraulic parts and so on hydraulic system is the need for hydraulic oil as a medium to carry out transmission work.The quality of hydraulic oil will affect the reliability of the hydraulic system and the service life of the equipment to a great extent.
Excavator parts hydraulic oil model national standard classification HL type, HM type, HG type three.
(1) HG type has anti-rust, anti-oxidation performance, and added viscosity index improver, has a good viscosity-temperature characteristics.This type of hydraulic oil turned out to be 32G and 68G in ordinary hydraulic oil, also known as hydraulic guide oil.
(2) HM type has alkaline high zinc, alkaline low zinc, neutral high zinc and ash free series, etc. According to the kinematic viscosity of 40 degrees Celsius, it can be divided into 22, 32, 46 and 68 grades.


Hydraulic fittings of excavator

(3) HL type hydraulic oil is refined depth of relatively high medium base oil with anti-oxidation and anti-rust additives prepared from.According to 40 degrees Celsius kinematic viscosity can be divided into 15, 22, 32, 46, 68, 100 six grades.
Hydraulic fittings of excavator
2, hydraulic oil model use
Different types of hydraulic oil are used for different purposes.
(1) HG hydraulic oil has good anti-rust, anti-oxygen, anti-wear, anti-stick-slip characteristics, so it is mainly suitable for the lubrication system of hydraulic and guide rail of machine tools.
(2) HM hydraulic oil is mainly used in the hydraulic system of vane pump, piston pump and gear pump of heavy load, medium pressure and high pressure excavator fittings.In addition, this kind of hydraulic oil is also suitable for medium pressure, high pressure engineering equipment and vehicle hydraulic system.
(3) HL hydraulic oil is used for lubrication of all kinds of machine tools bearing boxes, low pressure circulation system and so on, which have no special requirements for lubricating oil and the ambient temperature is above zero degrees Celsius.This kind of product generally has very good sealing adaptability, the highest use temperature up to 80 degrees Celsius.
3. The key point is coming. How to choose the hydraulic oil model?
In fact, it's easy to know the above two things.At the time of selection, we must choose the varieties of hydraulic oil according to the working environment and working conditions. When choosing hydraulic oil, we should comprehensively consider the working pressure, temperature, environment, hydraulic system and the structure and material of excavator parts, as well as the economy and so on.For the working pressure is relatively large, for the lubrication and wear resistance of hydraulic oil requirements are relatively high, you can choose HL or HM type hydraulic oil.