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1) classification of hydraulic oil
According to the use requirements: wear, low pour point, fire resistant, anti clean, silver, NC, hydraulic transmission oil etc..
According to the performance: mineral oil and synthetic oil.
According to the working principle: the use of liquid pressure energy of liquid liquid kinetic energy for transmission and hydraulic transmission.
2) the advantages and disadvantages of hydraulic system
Hydraulic system oil classification, specifications, quality requirements and matters needing attention.
HL hydraulic oil
HM anti-wear hydraulic oil
HG hydraulic oil rail
HV, HS low temperature hydraulic oil
Aqueous solution
3) the main performance of hydraulic oil
1 Viscosity and viscosity temperature characteristics
2 low temperature performance
3 oxidation stability
4 anti rust and corrosion protection
5 wear resistance
6 Shear Stability
7 anti emulsification and hydrolytic stability
8 foam and air release.
9 cleanness and filtration performance
10 hydraulic and sealing materials, coatings and other non-metallic materials and metal materials adaptability
4) the selection of hydraulic oil
1 indoor, fixed equipment, small changes in ambient temperature
2 open, cold, cold area walking hydraulic equipment, environment temperature
The 3 underground water and hydraulic equipment, wet environment
4 in the vicinity of the high temperature heat source and fire equipment