CPC F04D 29/046 (2013.01) [F04D 29/057 (2013.01); F16C 17/024 (2013.01); F16C 17/042 (2013.01); F16C 33/08 (2013.01); F04C 2240/40 (2013.01); F04C 2240/54 (2013.01); F04D 29/056 (2013.01); F16C 17/24 (2013.01); F16C 2360/44 (2013.01)] | 10 Claims |
1. A fluid machine, comprising:
a rotary shaft;
an operation body configured to discharge fluid by rotation of the rotary shaft;
a housing accommodating the rotary shaft and the operation body; and
a foil bearing disposed in the housing and rotatably supporting the rotary shaft, the foil bearing including:
a bearing housing having a cylindrical shape and including an inner peripheral surface, wherein the inner peripheral surface forms an inner peripheral circle of the bearing housing;
a top foil disposed between the inner peripheral surface of the bearing housing and the rotary shaft; and
a bump foil disposed between the inner peripheral surface of the bearing housing and the top foil and elastically supporting the top foil, wherein
the bearing housing has a protrusion that protrudes inwardly in a radial direction of the bearing housing from the inner peripheral surface of the bearing housing,
the protrusion includes an abutment surface configured to restrict deformation of the bump foil to an elastic range so as not to reach a plastic range by abutting against an outer surface of the top foil or an outer surface of the bump foil when the top foil is displaced outwardly in the radial direction of the bearing housing, and
the protrusion protrudes more inwardly in the radial direction of the bearing housing than the inner peripheral circle of the bearing housing.
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