US 12,221,999 B2
Turbo fluid machine
Fumihiro Suzuki, Aichi-ken (JP); Fumiya Shinoda, Aichi-ken (JP); Hidetaka Hayashi, Aichi-ken (JP); Naoharu Ueda, Aichi-ken (JP); and Takuhito Tsutsui, Aichi-ken (JP)
Assigned to KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Kariya (JP)
Filed by KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Kariya (JP)
Filed on Nov. 22, 2022, as Appl. No. 17/992,464.
Claims priority of application No. 2021-192052 (JP), filed on Nov. 26, 2021.
Prior Publication US 2023/0167849 A1, Jun. 1, 2023
Int. Cl. F16C 17/02 (2006.01); C10M 125/04 (2006.01)
CPC F16C 17/024 (2013.01) [C10M 125/04 (2013.01); C10M 2217/0443 (2013.01); F16C 2223/30 (2013.01); F16C 2360/00 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A turbo fluid machine comprising:
a rotating member having a bearing-contact surface;
an operating part configured to rotate together with the rotating member to compress and discharge a fluid;
a housing accommodating the rotating member and the operating part; and
a foil bearing having a bearing surface that faces the bearing-contact surface and supporting the rotating member such that the rotating member is rotatable relative to the housing, wherein
at least one of the bearing-contact surface or the bearing surface has thereon a coating layer,
the coating layer comprises polyamide-imide serving as a binder resin and molybdenum disulfide serving as a solid lubricant,
a mass ratio of molybdenum disulfide to polyamide-imide is 0.42 or more, and
a surface roughness of the coating layer is between 0 μm and 0.15 μm.