# US 2020/0400038 A1 · Rotary machine

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- Number: US 2020/0400038 A1
- Document ID: US20200400038A1
- Status: Published application
- Kind: A1
- Application number: 16/767,348
- Filed: 2018-12-14
- Published: 2020-12-24
- Earliest claimed: 2017-12-15
- Assignees: Mitsubishi Hitachi Power Systems, Ltd.
- Applicants: Mitsubishi Hitachi Power Systems, Ltd.
- Inventors: Toshihiko AZUMA; Ryuichi UMEHARA
- Web page: https://patentgrep.com/patent/US20200400038A1

## CPC

- F01D 5/28: Selecting particular materials; {Particular measures relating thereto;} Measures against erosion or corrosion
- F04D 29/324: {Blades}
- F01D 5/147: {Construction, i.e. structural features, e.g. of weight-saving hollow blades (F01D5/148, F01D5/16 and F01D5/20 take precedence; blade shape F01D5/141; blades with cooling or heating channels or cavities F01D5/18; heating, heat-insulating or cooling means on blades F01D5/18)}
- F01D 5/16: for counteracting blade vibration
- F01D 5/26: Antivibration means not restricted to blade form or construction or to blade-to-blade connections {or to the use of particular materials}
- F01D 5/282: {Selecting composite materials, e.g. blades with reinforcing filaments}
- F01D 25/06: for preventing blade vibration (means on blade-carrying members or blades F01D5/00)
- F04D 29/023: {especially adapted for elastic fluid pumps}
- F05D 2220/32: in gas turbines
- F05D 2260/96: Preventing, counteracting or reducing vibration or noise
- F05D 2260/961: by mistuning rotor blades or stator vanes with irregular interblade spacing, airfoil shape
- F05D 2300/603: Composites; e.g. fibre-reinforced
- F05D 2300/6034: Orientation of fibres, weaving, ply angle
- Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A rotary machine includes a rotary shaft configured to rotate around an axis and a blade row including a plurality of blades at intervals in a circumferential direction of the axis. Each of the blades includes a fiber laminate obtained by laminating a plurality of fiber sheets and a resin used for forming an outer shape of the blade by impregnating the fiber laminate. At least two of the blades in the blade row have fiber laminates having different structures.

## Claims

### Claim 1

A rotary machine, comprising:
a rotary shaft configured to rotate around an axis; and
a blade row including a plurality of blades at intervals in a circumferential direction of the axis,
wherein each of the blades includes:
a fiber laminate obtained by laminating a plurality of fiber sheets; and
a resin used for forming an outer shape of the blade by impregnating the fiber laminate, and
at least two of the blades in the blade row have fiber laminates having different structures.

### Claim 2 (depends on 1)

The rotary machine according to claim 1, wherein the plurality of blades have the same outer shape.

### Claim 3 (depends on 1)

The rotary machine according to claim 1, wherein, in the fiber laminates having structures different from each other, fiber directions of some of fiber sheets of one layer or more among the plurality of fiber sheets are different.

### Claim 4 (depends on 1)

The rotary machine according to claim 1, wherein, in the fiber laminates having structures different from each other, fiber types of some of fiber sheets of one layer or more among the plurality of fiber sheets are different.

### Claim 5 (depends on 1)

The rotary machine according to claim 1, wherein, in the fiber laminates having structures different from each other, fiber diameters of some of fiber sheets of one layer or more among the plurality of fiber sheets are different.