At present

foreign brands almost occupy the entire fan lubrication market share

and domestic oil products lack opportunities to enter the market. To demonstrate the feasibility of domestic substitution of lubricating oil for wind turbine gearboxes

the testing and analysis database for domestic gearbox lubricating oil and foreign competitors is established by adopting laboratory analysis to test the physical and chemical performance indicators(including kinematic viscosity

viscosity index

flash point

pour point

moisture

acid value

demulsibility

foam characteristics

liquid phase corrosion

and copper corrosion)

tribological performance indicators(sucn as maximum seizure free load

sintering load

friction coefficient

wear spot diameter

comprehensive wear)

and other lubricating oil performance indicators(like antioxidant performance

ferrography

infrared spectroscopy

and PQ index). The comprehensive performance of domestic gearbox lubricating oil products is systematically evaluated

and the feasibility study of domestic substitution of wind turbine lubricating oil is completed. The results indicate that there is not much difference in the basic performance indicators between domestic brand fan gearbox lubricating oil products and imported brands

and the substitution is feasible.