F - Mech Eng,Light,Heat,Weapons – 03 – D
Patent
F - Mech Eng,Light,Heat,Weapons
03
D
F03D 11/00 (2006.01) F16J 15/46 (2006.01)
Patent
CA 2699279
The present invention provides a wind turbine generator in which an oil seal structure provided in a blade rotating ring bearing 10 of a wind turbine blade is improved and leakage of lubricant oil to outside is prevented or suppressed. A wind turbine generator in which a rotor head has wind turbine blades, the rotor head rotates when the wind turbine blades receive wind power and drives a power generator disposed in a nacelle to generate electricity, the nacelle is disposed on an upper end of a tower that stands on a foundation such that the nacelle can yaw-slew, a blade rotating ring bearing 10 is disposed between the wind turbine blade and the rotor, the wind turbine generator includes a pitch control mechanism that can adjust a pitch angle of the wind turbine blades, wherein seal mechanisms 14 and 20 are mounted on both ends of opposed rolling body holding surfaces 11a and 12a of an outer race 11 and an inner race 12 of the blade rotating ring bearing 10 with rolling bodies 13 interposed between both the ends, sides of the seal mechanisms 14 and 20 closer to the blade are formed into a double sealed structure in which a space 23 is disposed between seal members 21 and 22 and the seal members 21 and 22 are disposed in an axial direction of the blade, pressurized fluid is supplied to the space 23, and lips of the seal members 21 and 22 are pushed against a mating sidewall surface.
Fujioka Yoshihiro
Imanaga Atsushi
Mitsubishi Heavy Industries Ltd.
Riches Mckenzie & Herbert Llp
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