Impeller and rotary machine
This impeller is equipped with: an impeller body formed from a resin and shaped as a disk with an axis as the center thereof, and having a boss hole section formed therein which a rotating shaft for rotating around the axis engages; compressor blades provided on the front-surface side of the impeller body; and a ring-shaped reinforcing ring provided inside the impeller body in the circumferential direction of the impeller body.
1. An impeller comprising:
an impeller body that is formed of a resin, forms a disk-like shape about an axis, and has a boss hole section formed therein, a rotating shaft rotating about the axis being fitted to the boss hole section;
a plurality of blades provided on a front surface side of the impeller body; and
a reinforcing ring that is disposed in a circumferential direction of the impeller body inside the impeller body, and forms an annular shape,
wherein the reinforcing ring has
a base part that forms an annular shape in the circumferential direction of the rotating shaft, and
an engaging part that extends in a direction of the axis from the base part, on a side closer to the inside of the impeller body than the base part.
2. The impeller according to claim 1 ,
wherein the base part is exposed to an inner peripheral surface of the boss hole section in the impeller body.
3. The impeller according to claim 2 ,
wherein the engaging part in the reinforcing ring has a curved engaging surface that is curved so as to protrude toward the impeller body side.
4. The impeller according to claim 1 ,
wherein the reinforcing ring is disposed at a position in the direction of the axis where a stress generated in the impeller body reaches a maximum.
5. The impeller according to claim 1 ,
wherein an outer peripheral end of the reinforcing ring is disposed at a position that is spaced apart to be larger than 0.1 times a diameter dimension between the axis and the outer peripheral end of the impeller body, from the axis of the impeller body.
6. The impeller according to claim 1 ,
wherein the reinforcing ring is formed of a complex material including a thermosetting resin and reinforcing fibers.
7. The impeller according to claim 6 ,
wherein the reinforcing ring is disposed such that the reinforcing fibers extend in the circumferential direction of the impeller body.
8. The impeller according to claim 1 ,
wherein the reinforcing ring is formed of a metal material.
9. The impeller according to claim 1 , further comprising:
a second 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.
10. 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.
11. The impeller according to claim 2 ,
wherein the reinforcing ring is disposed at a position in the direction of the axis where a stress generated in the impeller body reaches a maximum.
12. The impeller according to claim 3 ,
wherein the reinforcing ring is disposed at a position in the direction of the axis where a stress generated in the impeller body reaches a maximum.
13. The impeller according to claim 2 ,
wherein an outer peripheral end of the reinforcing ring is disposed at a position that is spaced apart to be larger than 0.1 times a diameter dimension between the axis and the outer peripheral end of the impeller body, from the axis of the impeller body.
14. The impeller according to claim 3 ,
wherein an outer peripheral end of the reinforcing ring is disposed at a position that is spaced apart to be larger than 0.1 times a diameter dimension between the axis and the outer peripheral end of the impeller body, from the axis of the impeller body.
15. The impeller according to claim 4 ,
wherein an outer peripheral end of the reinforcing ring is disposed at a position that is spaced apart to be larger than 0.1 times a diameter dimension between the axis and the outer peripheral end of the impeller body, from the axis of the impeller body.
16. The impeller according to claim 2 ,
wherein the reinforcing ring is formed of a complex material including a thermosetting resin and reinforcing fibers.
17. The impeller according to claim 3 ,
wherein the reinforcing ring is formed of a complex material including a thermosetting resin and reinforcing fibers.
18. The impeller according to claim 4 ,
wherein the reinforcing ring is formed of a complex material including a thermosetting resin and reinforcing fibers.
19. The impeller according to claim 5 ,
wherein the reinforcing ring is formed of a complex material including a thermosetting resin and reinforcing fibers.
20. The impeller according to claim 2 ,
wherein the reinforcing ring is formed of a metal material.