US 11,815,069 B2
Main bearing replacement method for wind turbine power generation facility
Tatsuya Sakaue, Tokyo (JP); Tomokazu Yamada, Tokyo (JP); and Yosuke Midorikawa, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed by MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed on Dec. 15, 2021, as Appl. No. 17/551,358.
Claims priority of application No. 2021-131501 (JP), filed on Aug. 12, 2021.
Prior Publication US 2023/0049543 A1, Feb. 16, 2023
Int. Cl. F03D 80/70 (2016.01); F03D 13/20 (2016.01); F03D 15/10 (2016.01); F03D 80/50 (2016.01)
CPC F03D 80/70 (2016.05) [F03D 13/20 (2016.05); F03D 15/10 (2016.05); F03D 80/50 (2016.05); F05B 2230/80 (2013.01); F05B 2240/50 (2013.01); F16C 2360/31 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A main bearing replacement method for a wind turbine power generation facility,
wherein the wind turbine power generation facility comprises a nacelle; a rotor head rotatably supported by the nacelle, a drive shaft to which rotation of the rotor head is transmitted, a main bearing disposed between the rotor head and the nacelle, a coupling connecting the rotor head and the drive shaft on a radially inner side of the main bearing, a main bearing sleeve fitted and fixed to an inner ring of the main bearing and mounted with the rotor head, an inner ring retainer disposed between the rotor head and the main bearing sleeve and fixed to the main bearing sleeve, and a rotor-side inner ring fixed to the inner ring retainer and constituting the coupling,
the main bearing replacement method comprising:
replacing the main bearing by replacing at least while the main bearing sleeve is fitted and fixed to the inner ring of the main bearing,
wherein in the replacing the main bearing step, the main bearing is replaced while the inner ring retainer is fixed to the main bearing sleeve and the rotor-side inner ring is fixed to the inner ring retainer.