Rotary device

Abstract

The rotary device includes an impeller, a first housing, a second housing, an annular flow path positioned radially outside the impeller, a plurality of vanes arranged in the annular flow path, a ring plate positioned between the plurality of vanes and the second housing and supporting the plurality of vanes, the plurality of vanes being fixed to the ring plate, the ring plate including a positioning surface facing radially inward and contacting the second housing from a radially outer side, and an elastic body arranged between the ring plate and the second housing and pressing the ring plate and the plurality of vanes in the axial direction, the positioning surface being located radially inside the elastic body or being located at the same position as a radially inner end of the elastic body in a radial direction.

What is claimed is: 
     
         1 . A rotary device comprising:
 a shaft;   an impeller that is provided at one end of the shaft;   a first housing that accommodates the impeller;   a second housing that is connected to the first housing and that accommodates a bearing rotatably supporting the shaft;   an annular flow path that is formed between the first housing and the second housing and that is positioned radially outside the impeller;   a plurality of vanes that are arranged along a circumferential direction in the annular flow path;   a ring plate that is positioned between the plurality of vanes and the second housing and that supports the plurality of vanes, the plurality of vanes being fixed to the ring plate, the ring plate including a positioning surface that faces radially inward and that contacts the second housing from a radially outer side; and   an elastic body that is arranged between the ring plate and the second housing and that presses the ring plate and the plurality of vanes in the axial direction, the positioning surface being located radially inside the elastic body or being located at the same position as a radially inner end of the elastic body in a radial direction.   
     
     
         2 . The rotary device according to  claim 1 , comprising:
 a scroll flow path that is formed in the first housing and that is positioned radially outside the annular flow path,   wherein a radially outer edge of one of the plurality of vanes is positioned on a line segment connecting a tongue of the scroll flow path and an axis of the impeller when seen in the axial direction.   
     
     
         3 . The rotary device according to  claim 1 , wherein the ring plate includes one of a protrusion and a groove that engages with the protrusion, and
 one of the first housing and the second housing includes the other of the protrusion and the groove.   
     
     
         4 . The rotary device according to  claim 1 , wherein the elastic body contacts the ring plate at a position radially outside of radially inner edges of the plurality of vanes.