US 12,117,041 B2
Turbo fluid machine
Fumiya Shinoda, Aichi (JP); Fumihiro Suzuki, Aichi (JP); and Takahito Kunieda, Aichi (JP)
Assigned to KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Aichi (JP)
Filed by KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Aichi (JP)
Filed on Dec. 14, 2022, as Appl. No. 18/081,181.
Claims priority of application No. 2021-211478 (JP), filed on Dec. 24, 2021.
Prior Publication US 2023/0204068 A1, Jun. 29, 2023
Int. Cl. F16C 17/04 (2006.01); F16C 17/08 (2006.01); F16C 17/26 (2006.01); F16C 27/02 (2006.01); F16C 35/02 (2006.01); F16C 37/00 (2006.01)
CPC F16C 17/042 (2013.01) [F16C 17/08 (2013.01); F16C 17/26 (2013.01); F16C 27/02 (2013.01); F16C 35/02 (2013.01); F16C 37/00 (2013.01); F16C 2360/24 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A turbo fluid machine comprising:
a rotary shaft configured to rotate about an axis of the rotary shaft;
a thrust collar having a plate shape and extending from a peripheral surface of the rotary shaft in a radial direction of the rotary shaft, the thrust collar being rotatable together with the rotary shaft;
an operating part configured to rotate together with the rotary shaft to compress and discharge a fluid;
a housing accommodating the rotary shaft, the thrust collar, and the operating part;
a partition wall having an insertion hole which is formed through the partition wall and through which the rotary shaft is inserted, the partition wall separating an inside of the housing into a compression space in which the operating part is accommodated and a bearing space in which the thrust collar is accommodated; and
a foil bearing supporting the thrust collar in an axial direction of the rotary shaft such that the thrust collar is rotatable relative to the partition wall, wherein
the partition wall includes a support part having an end face raised toward the thrust collar in the axial direction,
the support part has a groove formed in the end face and extending in the radial direction to an outer peripheral surface of the support part,
the foil bearing includes: a plurality of bump foils each formed of an elastic plate having a corrugated shape and mounted on the end face; and a plurality of top foils each formed of an elastic plate, wherein the bump foils are arranged around the insertion hole with a gap between the adjacent bump foils, wherein the top foils are arranged around the insertion hole with a gap between the adjacent top foils, and each have one surface facing the thrust collar and another surface elastically supported by the corresponding bump foil, and
the foil bearing is mounted on the support part such that a position of the groove corresponds to a position of the gap between the bump foils and a position of the gap between the top foils so that the groove faces the thrust collar in the axial direction.