Rotor component with surfaces for checking concentricity

• US 10,287,885 B2
• Filed: 02/23/2015
• Issued: 05/14/2019
• Est. Priority Date: 03/03/2014
• Status: Active Grant

• Current Assignee: Siemens Energy Global GmbH & Co. KG (Siemens AG)
• Original Assignee: Siemens AG
• Inventors: Milner, Glynn
• Primary Examiner(s): Shanske, Jason D
• Assistant Examiner(s): Delrue, Brian Christopher
• Application Number:
  US15/117,906
• Publication Number:
  US 20160362981A1
• Time in Patent Office: 1,541 Days
• Field of Search: 416 61, 29889, 73 66
• CPC Class Codes: F01D 21/003 Arrangements for testing or measuring for measuring vibrations G01H
• CPC Class Codes: F01D 25/005 Selecting particular materials
• CPC Class Codes: F01D 25/285 Temporary support structures, e.g. for testing, assembling, installing, repairing; Assembly methods using such structures
• CPC Class Codes: F01D 5/027 Arrangements for balancing for balancing rotating bodies in general F16F15/32; for compensating unbalance G01M1/36
• CPC Class Codes: F04D 27/001 Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
• CPC Class Codes: F04D 29/023 especially adapted for elastic fluid pumps
• CPC Class Codes: F04D 29/266 mounting compressor rotors on shafts
• CPC Class Codes: F04D 29/662 Balancing of rotors compensating unbalance G01M1/36
• CPC Class Codes: F05D 2220/31 in steam turbines
• CPC Class Codes: F05D 2220/32 in gas turbines
• CPC Class Codes: F05D 2230/80 Repairing, retrofitting or upgrading methods
• CPC Class Codes: F05D 2230/90 Coating; Surface treatment
• CPC Class Codes: F05D 2260/15 Load balancing
• CPC Class Codes: F05D 2260/83 Testing, e.g. methods, components or tools therefor
• CPC Class Codes: F05D 2260/95 Preventing corrosion
• CPC Class Codes: G01B 5/252 for measuring eccentricity, i.e. lateral shift between two parallel axes

Abstract

A rotor component for a rotor assembly of a fluid energy machine, particularly of a gas turbine, a steam turbine, a compressor or the like, wherein the rotor component is at least partly made of a material susceptible to corrosion and/or oxidation and can be arranged concentrically to a rotation axis of the rotor assembly. The rotor component includes a circular surface for checking concentricity of the rotor component with respect to the rotation axis. The rotor component includes at least one additional circular surface for checking concentricity of the rotor component with respect to the rotation axis, wherein the additional circular surface is coated with a corrosion and/or oxidation protection coating.

Claims

1. A rotor component for a rotor assembly of a fluid energy machine,

wherein the rotor component is at least partly made of a material susceptible to corrosion and/or oxidation and is arranged concentrically to a rotation axis of the rotor assembly,

wherein the rotor component comprises:

a circular surface for checking concentricity of the rotor component with respect to the rotation axis, and

at least one additional circular surface for checking concentricity of the rotor component with respect to the rotation axis,

wherein the additional circular surface is coated with a corrosion and/or oxidation protection coating,

wherein the circular surface and the at least one additional circular surface comprise the material susceptible to corrosion and/or oxidation.

2. The rotor component according to claim 1,

wherein the diameter of the additional circular surface differs from the diameter of the circular surface.

3. The rotor component according to claim 2,

wherein the diameter of the additional circular surface is less than the diameter of the circular surface.

4. The rotor component according to claim 1,

wherein the rotor component is a rotor disc for coupling a rotor platform of the rotor assembly to a rotor shaft of the rotor assembly.

5. The rotor component according to claim 1,

wherein the material susceptible to corrosion and/or oxidation is any one of a group comprising a carbon steel, a low carbon steel, a predominantly ferrous material or ferrous alloy which has less than 11% Chrome content, and aluminium.

6. A rotor assembly for a fluid energy machine comprising a gas turbine, a steam turbine, or a compressor, the rotor assembly comprising:

at least one rotor component according to claim 1.

7. A fluid energy machine comprising a gas turbine, a steam turbine, or a compressor, the fluid energy machine comprising:

at least one rotor assembly according to claim 6.

12. A method for checking the concentricity of a rotor component according to claim 1 with respect to a rotation axis of a rotor assembly of a fluid energy machine, after use of the rotor component, the method comprising:

removing the corrosion and/or oxidation protection coating from the additional circular surface; and

checking the concentricity of the rotor component with respect to the rotation axis.

13. The method according to claim 12,

wherein the concentricity of the rotor component with respect to a rotation axis is checked using an indicator device.

8. A method for manufacturing of a rotor component for a rotor assembly of a fluid energy machine comprising:

providing a blank body made at least partly of a material susceptible to corrosion and/or oxidation;

forming a circular surface for checking concentricity of the rotor component with respect a rotation axis of the rotor assembly, the circular surface comprises the material susceptible to corrosion and/or oxidation;

forming at least one additional circular surface for checking concentricity of the rotor component with respect to the rotation axis, the at least one additional circular surface comprises the material susceptible to corrosion and/or oxidation; and

coating the additional circular surface with a corrosion and/or oxidation protection coating.

9. The method according to claim 8,

wherein the additional circular surfaced is formed such that the diameter of the additional circular surface differs from the diameter of the circular surface.

10. The method according to claim 9,

wherein the additional circular surfaced is formed such that the diameter of the additional circular surface is less than the diameter of the circular surface.

11. The method according to claim 8,

wherein carbon steel is used as material susceptible to corrosion and/or oxidation.