Torque loss in cylindrical roller thrust bearings lubricated with wind turbine gear oils at constant temperature

Ionic liquids as an additive in fully formulated wind turbine gearbox oils

“…These energy losses also depend on the physical and film forming properties of the gear oil [3][4][5][6].…”

“…Material pairs such as steel/steel, steel/SiO 2 , steel/aluminium, steel/copper, steel/Si(100), steel/sialon, steel/titanium, sialon/Si 3 N 4 and steel-PVD coatings (TiN, DLC and CrN) have been explored using pyridinium, imidazolium, phosphonium or ammonium as cation combined with anions such as hexafluorophosphate (PF 6 ), tetrafluoroborate (BF 4 ), CF 3 SO 3 , (C 2 F 5 ) 3 PF 3 (or FAP) and (CF 3 SO 2 ) 2 N (or NTf 2 ) [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. The most common anions examined in the tribology literature are BF 4 and PF 6 , but their hydrolytic instability and tendency to produce corrosive HF have been reported [27]. Merck KGaA has developed a new category of ILs using the FAP anion, which has an improved hydrolytic stability [28].…”

Film thickness and traction curves of wind turbine gear oils

“…Table 1 displays the wind turbine gear oils physical properties as well as their chemical composition. A detailed description on the physical properties can be found on previous works with same oils [14,15,16,17,18].…”

Evaluation of bearing, gears and gearboxes performance with different wind turbine gear oils

“…Fernades et al [30][31][32] detailed the numerical model and the calculation procedure, so only some remarks will be presented in this work.…”