Impeller and rotary machine

Abstract

This impeller is equipped with: an impeller body for rotating around an axis along with a rotating shaft, formed from a resin and shaped as a disk; compressor blades provided on a hub surface of the impeller body; and a reinforcing ring which is formed from a resin and reinforcing fibers in a ring shape extending in the circumferential direction, and engages, from the outer peripheral side, a step section formed in the back surface of the impeller body and having a fitting surface facing the outer peripheral side.

1 . An impeller comprising:
 an impeller body that is formed of a resin, forms a disk-like shape, and rotates about a rotation center axis together with a rotating shaft;   a plurality of blades provided on a front surface side of the impeller body; and   a reinforcing ring that is formed on a back surface of the impeller body, is fitted to a step section, having a surface facing an outer peripheral side, from the outer peripheral side, is formed of a resin and reinforcing fibers, and forms an annular shape in a circumferential direction of the impeller body.   
     
     
         2 . The impeller according to  claim 1 ,
 wherein the step section is formed at a position of ⅔ of a diameter dimension between the rotation center axis and an outer peripheral end of the impeller body from the rotation center axis.   
     
     
         3 . The impeller according to  claim 1 ,
 wherein the step section is formed such that the center of the reinforcing ring in a radial direction is located at a position that is larger than 0.1 times a diameter dimension between the rotation center axis and an outer peripheral end of the impeller body from the rotation center axis and is smaller than the diameter dimension.   
     
     
         4 . The impeller according to  claim 1 ,
 wherein the impeller body is provided with a boss part that protrudes from the back surface and has the rotating shaft fitted thereto, and   wherein the step section is formed at the boss part.   
     
     
         5 . The impeller according to  claim 1 ,
 wherein a width dimension of the reinforcing ring in a radial direction and a blade thickness dimension of the blades in the circumferential direction are the same, and a thickness dimension of the reinforcing ring in a direction of the rotation center axis is larger than the width dimension of the reinforcing ring in the radial direction.   
     
     
         6 . The impeller according to  claim 1 ,
 wherein the reinforcing ring is disposed such that the reinforcing fibers extend in the circumferential direction of the impeller body.   
     
     
         7 . An impeller comprising:
 an impeller body that is formed of a resin, forms a disk-like shape, and rotates about a rotation center axis together with a rotating shaft;   a plurality of blades provided on a front surface side of the impeller body; and   a reinforcing ring that is formed on a back surface of the impeller body, is provided at a step section, having a surface facing an outer peripheral side, from the outer peripheral side, is formed of only reinforcing fibers, and forms an annular shape in a circumferential direction of the impeller body.   
     
     
         8 . The impeller according to  claim 1 , further comprising:
 a second reinforcing ring that is disposed in the circumferential direction of the impeller body inside the impeller body and forms an annular shape.   
     
     
         9 . A rotary machine comprising:
 the impeller according to  claim 1 ; and   a rotating shaft that is attached to the impeller and rotates together with the impeller.   
     
     
         10 . The impeller according to  claim 2 ,
 wherein a width dimension of the reinforcing ring in a radial direction and a blade thickness dimension of the blades in the circumferential direction are the same, and a thickness dimension of the reinforcing ring in a direction of the rotation center axis is larger than the width dimension of the reinforcing ring in the radial direction.   
     
     
         11 . The impeller according to  claim 3 ,
 wherein a width dimension of the reinforcing ring in a radial direction and a blade thickness dimension of the blades in the circumferential direction are the same, and a thickness dimension of the reinforcing ring in a direction of the rotation center axis is larger than the width dimension of the reinforcing ring in the radial direction.   
     
     
         12 . The impeller according to  claim 4 ,
 wherein a width dimension of the reinforcing ring in a radial direction and a blade thickness dimension of the blades in the circumferential direction are the same, and a thickness dimension of the reinforcing ring in a direction of the rotation center axis is larger than the width dimension of the reinforcing ring in the radial direction.   
     
     
         13 . The impeller according to  claim 2 ,
 wherein the reinforcing ring is disposed such that the reinforcing fibers extend in the circumferential direction of the impeller body.   
     
     
         14 . The impeller according to  claim 3 ,
 wherein the reinforcing ring is disposed such that the reinforcing fibers extend in the circumferential direction of the impeller body.   
     
     
         15 . The impeller according to  claim 4 ,
 wherein the reinforcing ring is disposed such that the reinforcing fibers extend in the circumferential direction of the impeller body.   
     
     
         16 . The impeller according to  claim 5 ,
 wherein the reinforcing ring is disposed such that the reinforcing fibers extend in the circumferential direction of the impeller body.   
     
     
         17 . The impeller according to  claim 2 , further comprising:
 a second reinforcing ring that is disposed in the circumferential direction of the impeller body inside the impeller body and forms an annular shape.   
     
     
         18 . The impeller according to  claim 3 , further comprising:
 a second reinforcing ring that is disposed in the circumferential direction of the impeller body inside the impeller body and forms an annular shape.   
     
     
         19 . The impeller according to  claim 4 , further comprising:
 a second reinforcing ring that is disposed in the circumferential direction of the impeller body inside the impeller body and forms an annular shape.   
     
     
         20 . The impeller according to  claim 5 , further comprising:
 a second reinforcing ring that is disposed in the circumferential direction of the impeller body inside the impeller body and forms an annular shape.