US 12,392,327 B2
Wind turbine planet gear shaft and planet gear structure
Jing Zhou, Shanghai (CN); Weihua Qian, Shanghai (CN); He Zhu, Shanghai (CN); Jinguang Zhu, Dalian (CN); Dapeng Li, Shanghai (CN); Jeffrey Wei, Kunshan (CN); Bo Shen, Jiangyin (CN); Zhi Yang, Xiangtan (CN); Zunyang Bai, Xiangtan (CN); Yuan Chen, Xiangtan (CN); Yabin Zhang, Xiangtan (CN); Xueliang Lu, Xiangtan (CN); Jie Zhu, Xiangtan (CN); Bi Luo, Xiangtan (CN); and Shaohua Zhou, Xiangtan (CN)
Assigned to SKF (China) Co Ltd, Shanghai (CN); and Hunan SUND Technological Corporation, Xiangtan (CN)
Filed by SKF (China) Co Ltd, Shanghai (CN)
Filed on May 9, 2024, as Appl. No. 18/659,310.
Claims priority of application No. 202321182175.X (CN), filed on May 16, 2023.
Prior Publication US 2024/0384707 A1, Nov. 21, 2024
Int. Cl. F03D 80/70 (2016.01); F03D 15/10 (2016.01)
CPC F03D 80/709 (2023.08) [F03D 15/101 (2023.08); F03D 80/703 (2023.08); F05B 2260/40311 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A wind turbine planet gear shaft, comprising:
a shaft body having an outer surface, a segment of the shaft body outer surface comprising a slide bearing surface configured to form a radial slide bearing with an inner opening of a planet gear, the slide bearing surface having a first portion configured as a non-load-bearing zone and a second portion configured as a load-bearing zone,
exactly one axially elongate oil pocket in the slide bearing surface, the oil pocket being located in the non-load-bearing zone,
an oil supply channel in the shaft body having a first end in fluid communication with the oil pocket and a second end,
a first oil return channel in the slide bearing surface having a first end at a first longitudinal end of the oil pocket and a second end open to ambient air, and
a second oil return channel in the slide bearing surface having a first end at a second longitudinal end of the oil pocket and a second end open to the ambient air.