Distributed nested cell damping system

Patent metadata

Field	Value
Publication number	US-11261738-B2
Application number	US-201817309467-A
Country	US
Kind code	B2
Filing date	Dec 11, 2018
Priority date	Dec 11, 2018
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

A nested lattice structure for use in a damping system for a turbine blade includes a first lattice structure including: a first outer passage including a hollow interior; a second outer passage including a hollow interior; and an outer node including a hollow interior and forming an intersection of the first outer passage and the second outer passage. The nested lattice structure includes a second lattice structure nested within the hollow interior of the first lattice structure. The second lattice structure includes: a first inner passage; a second inner passage; and an inner node forming an intersection of the first inner passage and the second inner passage. Each of the first inner passage, the second inner passage, and the inner node are nested within the respective first outer passage, the second outer passage, and the outer node.

First claim

What is claimed is:

1. A nested lattice structure for use in a damping system for a turbine blade, the nested lattice structure comprising:
a first lattice structure comprising:
a first outer passage comprising a hollow interior;
a second outer passage comprising a hollow interior; and
an outer node comprising a hollow interior, the outer node forming an intersection of the first outer passage and the second outer passage;

a second lattice structure nested within the hollow interior of the first lattice structure, the second lattice structure comprising:
a first inner passage;
a second inner passage; and
an inner node, the inner node forming an intersection of the first inner passage and the second inner passage;

wherein each of the first inner passage, the second inner passage, and the inner node are nested within the respective first outer passage, the second outer passage, and the outer node.

2. The nested lattice structure of claim 1 , wherein the first lattice structure further comprises a third outer passage comprising a hollow interior, the third outer passage extending outwardly from the outer node, wherein the outer node and the first, second, and third outer passages collectively define a three-dimensional outer lattice structure.

3. The nested lattice structure of claim 2 , wherein the third outer passage is orthogonal to each of the first and second outer passages.

4. The nested lattice structure of claim 1 , wherein the second lattice structure further comprises a third inner passage, wherein the inner node and the first, second, and third inner passages collectively define a three-dimensional inner lattice structure.

5. The nested lattice structure of claim 1 , wherein the first and second outer passages are orthogonal to each other.

6. The nested lattice structure of claim 1 , wherein the first and second inner passages are solid.

7. The nested lattice structure of claim 1 , wherein the inner node and the first and second inner passages are hollow.

8. The nested lattice structure of claim 7 , further comprising a third lattice structure nested within the second lattice structure.

9. The nested lattice structure of claim 8 , wherein the third lattice structure further comprises:
a first tertiary passage; and
a second tertiary passage,
wherein the first and second tertiary passages are aligned within a two-dimensional plane of the third lattice structure.

10. The nested lattice structure of claim 9 , wherein the first lattice structure further comprises a third outer passage comprising a hollow interior, wherein the outer node and the first, second, and third outer passages collectively define a three-dimensional outer lattice structure;
wherein the second lattice structure further comprises a third inner passage, wherein the inner node and the first, second, and third inner passages collectively define a three-dimensional inner lattice structure;
wherein the first and second outer passages are orthogonal to each other; and
wherein the third outer passage is orthogonal to each of the first and second outer passages.

11. The nested lattice structure of claim 1 , wherein the first lattice structure is coupled to a first portion of the turbine blade.

12. The nested lattice structure of claim 11 , wherein the second lattice structure is coupled to a second portion of the turbine blade; and
wherein relative motion between the first lattice structure and the second lattice structure causes friction therebetween, thereby dissipating at least one vibration.

13. The nested lattice structure of claim 1 , wherein an outer diameter of the first outer passage is between about 2 and about 4 times an outer diameter of the first inner passage.

14. The nested lattice structure of claim 1 , wherein an inner diameter of the first outer passage is between about 1.5 and about 3.5 times an outer diameter of the first inner passage.

15. The nested lattice structure of claim 1 , further comprising at least one of a fluid and a powder disposed between the first lattice structure and the second lattice structure.

16. A vibration damping system for a turbine blade, the vibration damping system comprising:
a plurality of nested nodes connected to each other, each nested node of the plurality of nested nodes comprising:
a first lattice structure comprising:
a first outer passage comprising a hollow interior;
a second outer passage comprising a hollow interior; and
an outer node comprising a hollow interior, the outer node forming an intersection of the first outer passage and the second outer passage;

a second lattice structure nested within the hollow interior of the first lattice structure, the second lattice structure comprising:
a first inner passage;
a second inner passage; and
an inner node, the inner node forming an intersection of the first inner passage and the second inner passage;

wherein each of the first inner passage, the second inner passage, and the inner node are nested within the respective first outer passage, the second outer passage, and the outer node, and
wherein at least one of the first outer passage and the second outer passage of each of the nested nodes is coupled to at least one passage of an adjacent nested node.

17. The vibration damping system of claim 16 , further comprising at least one of a fluid and a powder disposed between the first lattice structure and the second lattice structure.

18. A turbine blade comprising:
a blade portion, the blade comprising:
an airfoil extending from a root portion to a tip portion and from a leading edge to a trailing edge;
a damping system disposed within the blade portion, the damping system comprising:
a first lattice structure comprising a hollow interior; and
a second lattice structure nested within the hollow interior of the first lattice structure;
wherein each of the first and second lattice structures dampen vibrations from the blade portion.

19. The turbine blade of claim 18 , wherein the first lattice structure is coupled to the root portion of the blade portion, and
wherein the second lattice structure is coupled to the tip portion of the blade portion.

20. The turbine blade of claim 18 , wherein the first lattice structure is coupled to the leading edge of the blade portion, and
wherein the second lattice structure is coupled to the trailing edge of the blade portion.

Assignees

• Gen Electric

Inventors

• Chakrabarti Suryarghya
• Sun Changjie

Classifications

• F05D2250/72

  symmetric · CPC title

• F05D2250/313

  the axes being perpendicular to each other · CPC title

• F05D2250/311

  the axes being in line · CPC title

• F05D2250/291

  hollowed · CPC title

• F05D2250/28

  patterned · CPC title