Turbo-type fluid machine and refrigeration apparatus

Patent metadata

Field	Value
Publication number	US-12480514-B2
Application number	US-202418403038-A
Country	US
Kind code	B2
Filing date	Jan 3, 2024
Priority date	Jul 5, 2021
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

A turbo-type fluid machine includes a shaft configured to be rotationally driven, a compression mechanism having an impeller, and a coupling portion coupling an end portion of the shaft and the impeller with each other. The coupling portion is provided with a balance adjustment mechanism.

First claim

The invention claimed is:

1 . A turbo-type fluid machine comprising:
a shaft configured to be rotationally driven; a compression mechanism having an impeller; and a coupling portion coupling an end portion of the shaft and the impeller with each other, the coupling portion being provided with a balance adjustment mechanism, the end portion of the shaft being connected to one end of the coupling portion in an axial direction of the shaft, and the compression mechanism being connected to an other end of the coupling portion in the axial direction.

2 . The turbo-type fluid machine of claim 1 , wherein the shaft, the coupling portion, and the impeller are separate components.

3 . The turbo-type fluid machine of claim 2 , wherein the balance adjustment mechanism includes
a plurality of holes formed in the coupling portion, and a weight component attached to a predetermined one of the plurality of holes.

4 . The turbo-type fluid machine of claim 2 , further comprising:
a first member arranged around an outer peripheral surface of the coupling portion to form a gap therebetween.

5 . A refrigeration apparatus including the turbo-type fluid machine according to claim 2 .

6 . The turbo-type fluid machine of claim 1 , wherein the balance adjustment mechanism includes
a plurality of holes formed in the coupling portion, and a weight component attached to a predetermined one of the plurality of holes.

7 . The turbo-type fhud machine of claim 6 , wherein
in the coupling portion, the plurality of holes are arranged in a circumferential direction of the coupling portion.

8 . The turbo-type fluid machine of claim 7 , further comprising:
a first member arranged around an outer peripheral surface of the coupling portion to form a gap therebetween.

9 . A refrigeration apparatus including the turbo-type fluid machine according to claim 7 .

10 . The turbo-type fluid machine of claim 6 , further comprising:
a first member arranged around an outer peripheral surface of the coupling portion to form a gap therebetween.

11 . A refrigeration apparatus including the turbo-type fluid machine according to claim 6 .

12 . The turbo-type fluid machine of claim 1 , further comprising:
a first member arranged around an outer peripheral surface of the coupling portion to form a gap therebetween.

13 . A refrigeration apparatus including the turbo-type fluid machine according to claim 1 .

14 . A turbo-type fluid machine comprising:
a shaft configured to be rotationally driven; a compression mechanism having an impeller; and a coupling portion coupling an end portion of the shaft and the impeller with each other, the coupling portion being provided with a balance adjustment mechanism, the shaft, the coupling portion, and the impeller being separate components, and a density of the coupling portion being less than a density of the shaft.

15 . The turbo-type fluid machine of claim 14 , wherein
the balance adjustment mechanism includes
a plurality of holes formed in the coupling portion, and
a weight component attached to a predetermined one of the plurality of holes.

16 . The turbo-type fluid machine of claim 14 , further comprising:
a first member arranged around an outer peripheral surface of the coupling portion to form a gap therebetween.

17 . A refrigeration apparatus including the turbo-type fluid machine according to claim 14 .

18 . A turbo-type fluid machine comprising:
a shaft configured to be rotationally driven a compression mechanism ng an impeller; and a coupling portion coupling an end portion of the shaft and the impeller with each other, the coupling portion being provided with a balance adjustment mechanism, the balance adjustment mechanism including
a plurality of holes formed in the coupling portion, and
a weight component attached to a predetermined one of the plurality of holes, in the coupling portion, the plurality of holes being arranged in a circumferential direction of the coupling portion,
the coupling portion, having a first line group and a second line group, each of the first line group and the second line group including the plurality of holes arranged in the circumferential direction of the coupling portion, and the first line group and the second line group being arranged in an axial direction of the coupling portion.

19 . The turbo-type fluid machine of claim 18 , further comprising:
a first member arranged around an outer peripheral surface of the coupling portion to form a gap therebetween.

20 . A turbo-type fluid machine comprising:
a shaft configured to be rotation lly driven; a compression mechanism having an impeller; a coupling portion coupling an end portion of the shaft and the impeller with each other; and a first member arranged around an outer peripheral surface of the coupling portion to form a gap therebetween, the coupling portion being provided with a balance adjustment mechanism, and an outer diameter of a portion of the coupling portion surrounded by the first member being smaller than an outer diameter of the shaft.

Assignees

• Daikin Ind Ltd

Inventors

• Iwata Arihiro
• Nishimura Kosuke
• Tanaka Koichi
• Fukuda Daigo
• KAWACHIYA Yuki

Classifications

• F04D29/266

  mounting compressor rotors on shafts · CPC title

• F04D29/053

  Shafts · CPC title

• F04D29/051

  Axial thrust balancing · CPC title

• F04D29/662 Primary

  Balancing of rotors (compensating imbalance G01M1/36) · CPC title

• F04D29/28

  for centrifugal or helico-centrifugal pumps {for radial-flow or helico-centrifugal pumps} · CPC title