# US 8,739,561 B2 · Turbo compressor, turbo refrigerator, and method of manufacturing turbo compressor

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- Number: US 8,739,561 B2
- Document ID: US8739561B2
- Status: Granted
- Kind: B2
- Application number: 13/069,573
- Filed: 2011-03-23
- Published: 2011-09-29
- Granted: 2014-06-03
- Earliest claimed: 2010-03-23
- Assignees: IHI Corporation
- Applicants: Kazuaki Kurihara
- Inventors: Kazuaki Kurihara
- Web page: https://patentgrep.com/patent/US8739561B2

## CPC

- F04D 29/624: {especially adapted for elastic fluid pumps}
- F04D 25/04: the pump being fluid-driven {(pumps driven by exhaust gases F02B37/00, F02B39/00; turbochargers F02C6/12)}
- F04D 29/266: {mounting compressor rotors on shafts}
- Y10T 29/49236: Fluid pump or compressor making
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A turbo compressor includes an impeller fixed to one end portion of a rotation shaft by a predetermined fastening member, and a regulating portion which is used to regulate rotation of the rotation shaft during fastening of the fastening member and is provided in the other end portion of the rotation shaft. The regulating portion is formed as a recessed portion recessed from an end surface of the other end portion of the rotation shaft.

## Claims

### Claim 1

A turbo compressor comprising:
an impeller fixed to one end portion of a rotation shaft by a predetermined fastening member; and
a regulating portion which is used to regulate rotation of the rotation shaft during fastening of the fastening member and is provided in the other end portion of the rotation shaft,
wherein the regulating portion is formed as a recessed portion recessed from an end surface of the other end portion of the rotation shaft, wherein a plurality of the recessed portions are provided.

### Claim 2 (depends on 1)

The turbo compressor according to claim 1, wherein the recessed portion is a female threaded portion.

### Claim 3 (depends on 1)

The turbo compressor according to claim 1, wherein a cross-sectional shape of the recessed portion on a surface perpendicular to an axial line of the rotation shaft is polygonal.

### Claim 4 (depends on 1)

A turbo refrigerator comprising:
a condenser which cools a compressed refrigerant so as to be liquefied;
an evaporator which takes away heat of vaporization from a cooling object that vaporizes the liquefied refrigerant thereby cooling the cooling object; and
a compressor which compresses the refrigerant vaporized by the evaporator and supplies the compressed refrigerant to the condenser,
wherein the turbo compressor according to claim 1 is included as the compressor.

### Claim 5 (depends on 3)

A turbo refrigerator comprising:
a condenser which cools a compressed refrigerant so as to be liquefied;
an evaporator which takes away heat of vaporization from a cooling object that vaporizes the liquefied refrigerant thereby cooling the cooling object; and
a compressor which compresses the refrigerant vaporized by the evaporator and supplies the compressed refrigerant to the condenser,
wherein the turbo compressor according to claim 3 is included as the compressor.

### Claim 6 (depends on 5)

A turbo refrigerator comprising:
a condenser which cools a compressed refrigerant so as to be liquefied;
an evaporator which takes away heat of vaporization from a cooling object that vaporizes the liquefied refrigerant thereby cooling the cooling object; and
a compressor which compresses the refrigerant vaporized by the evaporator and supplies the compressed refrigerant to the condenser,
wherein the turbo compressor according to claim 5 is included as the compressor.

### Claim 7

A method of manufacturing a turbo compressor which includes an impeller fixed to one end portion of a rotation shaft by a predetermined fastening member, and a regulating portion which is used to regulate rotation of the rotation shaft during fastening of the fastening member and is provided in the other end portion of the rotation shaft, the method comprising:
a first manufacturing step of holding a casing of the turbo compressor using a predetermined holding stand;
a second manufacturing step of installing the rotation shaft in the casing so as to be rotatable;
a third manufacturing step of connecting a rotation regulating member that regulates the rotation of the rotation shaft by cooperating with the regulating portion, to the regulating portion formed as a recessed portion recessed from an end surface of the other end portion of the rotation shaft; and
a fourth manufacturing step of fixing the impeller to the one end portion of the rotation shaft using the fastening member in a state where the rotation regulating member is locked by a part of the holding stand.

### Claim 8 (depends on 7)

The method according to claim 7,
wherein the recessed portion is a female threaded portion, and
in the third manufacturing step, the rotation regulating member is fixed to the regulating portion by a threaded member screwed to the female threaded portion.