Rotating machine

• US 9,267,382 B2
• Filed: 11/16/2011
• Issued: 02/23/2016
• Est. Priority Date: 11/19/2010
• Status: Expired due to Fees

• Current Assignee: Ansaldo Energia Switzerland AG
• Original Assignee: Alstom Technology Ltd. (Alstom SA)
• Inventors: Szwedowicz, Jaroslaw Leszek, Mozharov, Alexey, Irmisch, Stefan
• Primary Examiner(s): White, Dwayne J
• Assistant Examiner(s): BROWN, ADAM WAYNE
• Application Number:
  US13/297,288
• Publication Number:
  US 20120128473A1
• Time in Patent Office: 1,560 Days
• US Class Current: 1/1
• CPC Class Codes: F01D 17/14 varying effective cross-sectional area of nozzles or guide conduits
• CPC Class Codes: F01D 17/16 by means of nozzle vanes
• CPC Class Codes: F01D 25/08 Cooling of machines or engines in general F01P; Heating; Heat-insulation of blade-carrying members, of blades F01D5/00
• CPC Class Codes: F01D 25/12 Cooling
• CPC Class Codes: F01D 5/08 Heating, heat-insulating or cooling means specially adapted for radial flow machines or engines F01D5/04
• CPC Class Codes: F01D 5/187 Convection cooling
• CPC Class Codes: F01D 9/02 Nozzles; Nozzle boxes; Stator blades; Guide conduits , e.g. individual nozzles nozzle boxes F01D9/047
• CPC Class Codes: F05D 2270/303 Temperature
• CPC Class Codes: F05D 2300/505 Shape memory behaviour

Abstract

A rotating machine cooled by a cooling medium directed through the rotating machine in a main flow and a secondary flow includes a rotor. A stator includes a swirl passage configured to guide the secondary flow so as to be discharged from a pre-swirl nozzle. At least one control device includes a shape-memory alloy disposed in an area of the pre-swirl nozzle and is configured to control the secondary flow based on a temperature in an automated manner.

Claims

1. A rotating machine cooled by a cooling medium directed through the rotating machine in a main flow and a secondary flow, the rotating machine comprising:

a rotor;

a stator including a swirl passage configured to guide the secondary flow so as to be discharged from a pre-swirl nozzle; and

at least one control device including a shape-memory alloy disposed in an area of the pre-swirl nozzle and configured to control the secondary flow based on a temperature in an automated manner,

wherein a covering device is disposed at an outlet of the swirl passage and is configured to cover an opening of the outlet based on the temperature,

wherein the covering device includes a temperature-controlled diaphragm, and

wherein the diaphragm includes a plurality of diaphragm elements each connected to a torsion element including the shape-memory alloy, the plurality of torsion elements configured to rotate the plurality of diaphragm elements in a temperature-controlled manner so as to alter the covering of the outlet opening.

2. The rotating machine as recited in claim 1, wherein the rotating machine is a gas turbine, and wherein the cooling medium is cooling air.

3. The rotating machine as recited in claim 1, wherein the swirl passage includes a swirl vane disposed in the area of the pre-swirl nozzle, and wherein the at least one control device is configured to alter a flow cross section of the swirl passage in an area of the swirl vane based on the temperature.

4. The rotating machine as recited in claim 1, wherein the diaphragm includes the shape-memory alloy such that a temperature-dependent change of a dimension of the diaphragm alters the covering of the opening of the outlet.

5. The rotating machine as recited in claim 1, wherein at least one of the diaphragm elements includes the shape-memory alloy such that a temperature-dependent change of a dimension of the at least one diaphragm element alters the covering of the opening of the outlet.

6. The rotating machine as recited in claim 1, wherein the pre-swirl nozzle is in the secondary flow, and the at least one control device including the shape-memory alloy is disposed in the area of the pre-swirl nozzle in the secondary flow.