Assembly for a fluid flow machine

Patent metadata

Field	Value
Publication number	US-9822792-B2
Application number	US-201414290266-A
Country	US
Kind code	B2
Filing date	May 29, 2014
Priority date	May 31, 2013
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A structural assembly for a fluid-flow machine includes: a main flow path boundary and at least one row of relatively rotating blades with a gap existing between blade ends of the at least one row of blades and the main flow path boundary. At least one secondary flow duct has in the main flow path boundary one opening each at ends spaced apart in the flow direction, such that the secondary flow duct is connected to the main flow path via the two openings. The structural assembly has at least two components connected to one another, i.e. at least one support component and at least one connecting component, where the support component at least partially forms the main flow path boundary and where the connecting component forms or surrounds at least one part-section of the secondary flow duct.

First claim

What is claimed is:

1. A structural assembly for a fluid-flow machine provided with:
a main flow path boundary confining a main flow path of the fluid-flow machine, where a row of blades each with one blade end is arranged in the main flow path, where a gap exists between the blade ends of the row of blades and the main flow path boundary, and where there is a rotating relative movement between the blades of the row of blade and the main flow path boundary, and
a secondary flow duct, having in the main flow path boundary two openings each at ends spaced apart in a flow direction, such that the secondary flow duct is connected to the main flow path via the two openings,
wherein the structural assembly includes a support component and a connecting component connected to one another, where the support component at least partially forms the main flow path boundary and where the connecting component forms or surrounds at least one part-section of the secondary flow duct,
wherein the secondary flow duct within a meridional view is split into three part-sections: a rear part-section discharging with one opening into the main flow path, a front part-section discharging with one opening into the main flow path, and a central part-section connecting the two other part-sections to one another,
wherein both the front and rear part-sections of the secondary flow duct discharging into the main flow path are provided directly inside the support component and both the front and rear part-sections of the secondary flow duct discharging into the main flow path are associated with the same row of blades;
wherein locally on the circumference at least one connector is formed on that side of the support component facing away from the main flow path for the provision or passage of at least one of the secondary flow duct part-sections.

2. The structural assembly in accordance with claim 1 , wherein the connecting component is connected to the support component substantially on its side facing away from the main flow path.

3. The structural assembly in accordance with claim 1 , wherein at least one of the openings of the secondary flow duct is formed in the support component or in an adapter inserted into the support component.

4. The structural assembly in accordance with claim 3 , wherein the secondary flow duct is created in at least one part-section inside the support component and in at least one part-section inside the connecting component.

5. The structural assembly in accordance with claim 1 , wherein at least one of the openings of the secondary flow duct is provided in the connecting component.

6. The structural assembly in accordance with claim 5 , wherein the secondary flow duct is provided completely inside the connecting component.

7. The structural assembly in accordance with claim 1 , wherein the support component is designed as an annular casing of a fluid-flow machine, as a half-shell casing of a fluid-flow machine, in annular form on the hub of a fluid-flow machine, or in semi-annular form on the hub of a fluid-flow machine.

8. The structural assembly in accordance with claim 1 , wherein the secondary flow duct is designed as a one-way duct, having one opening through which fluid flows into the secondary flow duct and a second opening through which fluid exits the secondary flow duct.

9. The structural assembly in accordance with claim 1 , wherein at least one secondary flow duct is formed by an arrangement in which a single duct splits along its course into at least two ducts and thereby forms a type of Y-configuration, with an inflow opening and a plurality of outflow openings being associated with a secondary flow duct.

10. The structural assembly in accordance with claim 1 , wherein at least one secondary flow duct is formed by an arrangement in which at least two ducts converge into one duct, with a plurality of inflow openings and one outflow opening being associated with a secondary flow duct.

11. The structural assembly in accordance with claim 1 , wherein at least one of the part-sections of the secondary flow duct discharging into the main flow path is provided directly inside the support component.

12. The structural assembly in accordance with claim 1 , wherein at least one of the part-sections of the secondary flow duct discharging into the main flow path is created directly inside the support component using a metal-cutting method, an electro-chemical method or a laser method.

13. The structural assembly in accordance with claim 1 , wherein at least one of the part-sections of a secondary flow duct discharging into the main flow path is designed at least partially as a cylinder with elliptical or circular cross-section inside the support component.

14. The structural assembly in accordance with claim 1 , wherein at least one web extending continuously along at least part of the circumference is formed on that side of the support component facing away from the main flow path for the provision or passage of at least one of the secondary flow duct part-sections.

15. The structural assembly in accordance with claim 14 , wherein the at least one web or the at least one connector is formed on at least one separate adapter, said adapter being received by the support component.

16. The structural assembly in accordance with claim 1 , wherein at least one of the secondary flow duct part-sections passes through a web or a connector of the support component.

17. The structural assembly in accordance with claim 1 , wherein the connecting component surrounds a part-section of the secondary flow duct and adjoins at least one secondary flow duct part-section created directly inside the support component.

18. The structural assembly in accordance with claim 1 , wherein the connecting component adjoins both a first part-section directly provided in the support component and a second part-section directly provided in the support component, where the connecting component forms or surrounds a third part-section of the secondary flow duct and forms the connection between the first and second part-sections.

19. The structural assembly in accordance with claim 1 , wherein the connecting component is inserted at least in the area of an end of a secondary flow duct into openings in the support component and in this way directly adjoins the main flow path.

20. The structural assembly in accordance with claim 1 , wherein the connecting component contains only one secondary flow duct and is arranged at least partially as a tube or a hose freely in a space outside the support component.

21. The structural assembly in accordance with claim 1 , wherein a connection of the connecting component to the support component is achieved by a snug fit, plug-in, clamped, bolted, welded or brazed connection.

22. The structural assembly in accordance with claim 1 , wherein the connecting component includes a plurality of part-components connected to one another.

23. A fluid-flow machine having a structural assembly in accordance with claim 1 .

Assignees

• Rolls Royce Deutschland Ltd & Co Kg

Inventors

• Guemmer Volker

Classifications

• F04D29/685

  Inducing localised fluid recirculation in the stator-rotor interface · CPC title

• F04D29/526 Primary

  Details of the casing section radially opposing blade tips (ducts F04D29/545) · CPC title

• F04D29/161 Primary

  especially adapted for elastic fluid pumps · CPC title

• F04D29/541

  Specially adapted for elastic fluid pumps (F04D29/56 takes precedence) · CPC title

• F04D27/0215

  Arrangements therefor, e.g. bleed or by-pass valves · CPC title