Pulse body module with bearing protection

Patent metadata

Field	Value
Publication number	US-10689983-B2
Application number	US-201715793654-A
Country	US
Kind code	B2
Filing date	Oct 25, 2017
Priority date	Oct 26, 2016
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

An impulse body module a turbine stage of a gas turbine includes a holder component of one-piece construction, with a base and surrounding side walls arranged at the base, wherein the side walls and the base define a holding chamber; an insert component, of one-piece construction, which is inserted into the holding chamber of the holder component, wherein the holder component and the insert component accommodated therein define a number of mutually separated cavities, and wherein an impulse body, in particular a sphere, is accommodated in each cavity; and a closure component of one-piece construction, which is joined to the holder component in a material-bonded manner where the holding chamber is closed and the insert component is surrounded by the holder component and the closure component. The holder component has at least one base projection in the region of its base, which extends away from the holding chamber.

First claim

What is claimed is:

1. An impulse body module for a turbomachine, in particular a turbine stage of a gas turbine, comprising:
a holder component of one-piece construction, with a base and surrounding side walls arranged at the base, wherein the side walls and the base define a holding chamber,
an insert component of one-piece construction, which is inserted into the holding chamber of the holder component, wherein the holder component and the insert component accommodated therein are constructed in such a way that they together define a plurality of mutually separated cavities and wherein an impulse body, in particular a sphere, is accommodated in each cavity, and
a closure component of one-piece construction, which is joined to the holder component in a material-bonded manner in such a way that the holding chamber is closed and the insert component is surrounded by the holder component and the closure component,
wherein the holder component has at least one base projection in the region of its base or of the closure component, which extends away from the holding chamber.

2. The impulse body module according to claim 1 , wherein the base projection is arranged along a short side wall of the holder component.

3. The impulse body module according to claim 1 , wherein the base projection is substantially cubic in shape, with rounded corner regions at the transition to the base or to the closure component and at the transition to its free end.

4. The impulse body module according to claim 1 , wherein two equivalently or differently constructed base projections are located in the region of two corners of the holder component, between which a gap is provided.

5. The impulse body module according to claim 4 , wherein the one base projection, starting from the base or from the closure component, has a greater height than the other base projection.

6. The impulse body module according to claim 4 , wherein the one base projection has a smaller cross-sectional surface than the other base projection.

7. The impulse body module according to claim 1 , wherein the base projection is located in a central region of the base or of the closure component.

8. The impulse body module according to claim 1 , wherein a cross-sectional surface of the base projection is substantially triangular or rectangular or polygonal in shape.

9. The impulse body module according to claim 1 , wherein the holder component, together with the base projection, the insert component, and the closure component, is produced by an additive method.

10. The impulse body module according to claim 1 , wherein the holder component together with the base projection or/and the insert component or/and the closure component are produced at least in part by a material-removing manufacturing method.

11. A method for producing an impulse body module for a turbomachine, comprising the steps of:
forming a holder component through layer-by-layer buildup by an additive manufacturing method wherein the holder component has a base with at least one base projection and surrounding side walls arranged at the base, wherein the base is built up starting from the at least one base projection and wherein the side walls are built up starting from the base in such a way that a holding chamber is formed inside the side walls;
forming at least one insert component, at least sections of which are latticed, through layer-by-layer buildup by means of an additive manufacturing method;
inserting the insert component into the holding chamber of the holder component, wherein, prior to the insertion or during the insertion, impulse bodies are inserted into cavities that are formed jointly by the holder component and the insert component;
building up layer-by-layer on the holder component, together with the inserted insert component, of a closure component by means of an additive manufacturing method so that the holder component and the closure component are joined to each other in a material-bonded manner and form a one-piece encasement for the insert component and the incorporated impulse bodies.

12. The impulse body module according to claim 1 , further comprising a blade arrangement of a compressor stage or of a turbine stage of a gas turbine having a depression, in which the impulse body module is inserted, wherein the depression is provided in a region of the rotating blade root or in a region of the guide-vane root.

13. The impulse body module according to claim 12 , wherein the base projection has a form that is complementary to a depression in the blade arrangement.

14. The impulse body module according to claim 1 , wherein at least one impulse body module is provided in a gas turbine that comprises a plurality of compressor stages and a plurality of turbine stages, and is associated with a compressor stage or a turbine stage.

Assignees

• MTU Aero Engines AG

Inventors

• Schlemmer Markus
• Hartung Andreas
• Roesele Gerhard-Heinz
• Pernleitner Martin
• Schill Manfred
• Feldmann Manfred
• Ehrenberg Adrian

Classifications

• F01D25/06

  for preventing blade vibration (means on blade-carrying members or blades F01D5/00) · CPC title

• F05D2260/963

  by Helmholtz resonators · CPC title

• F01D5/10

  Anti- vibration means {(specially adapted for radial flow machines or engines F01D5/04)} · CPC title

• F05D2230/30

  with deposition of material · CPC title

• F05D2230/31

  Layer deposition · CPC title