Turbomachine, circulation structure and method

Patent metadata

Field	Value
Publication number	US-10151206-B2
Application number	US-201414315066-A
Country	US
Kind code	B2
Filing date	Jun 25, 2014
Priority date	Jun 27, 2013
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

A turbomachine having at least one circulation structure is disclosed. The circulation structure has an annular space with baffle elements surrounding a main flow path and is open to the main flow path. A housing of the turbomachine to receive the circulation structure is divided in an axial plane into a front housing region and a rear housing region and the circulation structure is divided into a front structure region and a rear structure region in the axial plane of separation. A circulation structure divided into two parts in the axial direction and a method for the same is also disclosed.

First claim

What is claimed is:

1. A turbomachine, comprising:
a housing, wherein in a first physical axial plane of separation, the housing is divided into a two-part structure including a front housing region and a rear housing region; and
a circulation structure accommodated in the housing, wherein the circulation structure has an annular space, wherein baffle elements are disposed in the annular space, wherein the annular space extends around a main flow path and is open to the main flow path, wherein the circulation structure, in a second physical axial plane of separation, is divided into a two-part structure including a front structure region and a rear structure region, wherein a gap is formed between the front structure region and the rear structure region at the second physical axial plane of separation, and wherein the rear structure region is formed by a front body section of a paneling element which is disposed in the rear housing region.

2. The turbomachine according to claim 1 , wherein the first axial plane of separation and the second axial plane of separation are a same axial plane of separation in an assembled state.

3. The turbomachine according to claim 1 , wherein the baffle elements are formed in the front structure region and wherein the front structure region is disposed in the front housing region.

4. The turbomachine according to claim 1 , wherein the baffle elements are formed in the front housing region.

5. A method for inserting a circulation structure into a housing of a turbomachine, comprising the steps of:
providing a housing of the turbomachine which is divided into a two-part structure including a front housing region and a rear housing region in a first physical axial plane of separation;
inserting a front structure region of the circulation structure into the front housing region of the housing and inserting a rear structure region of the circulation structure into the rear housing region of the housing, wherein the circulation structure is divided into a two-part structure including the front structure region and the rear structure region in a second physical axial plane of separation, wherein a gap is formed between the front structure region and the rear structure region at the second physical axial plane of separation, and wherein the rear structure region is formed by a front body section of a paneling element which is inserted into the rear housing region; and
joining the front and the rear housing regions in at the first physical axial plane of separation.

6. The method according to claim 5 , further comprising the step of forming air ducts in the front structure region of the circulation structure between baffle elements.

7. The method according to claim 5 , wherein the rear structure region of the circulation structure is formed by turning.

8. The method according to claim 5 , further comprising the step of forming baffle elements in the circulation structure and wherein transitional radii of the baffle elements are machined after forming the baffle elements.

Assignees

• MTU Aero Engines AG

Inventors

• Zotz Georg
• Brignole Giovanni
• Sahota Harsimar
• Mairhanser Vitalis

Classifications

• F01D9/02 Primary

  Nozzles; Nozzle boxes; Stator blades; Guide conduits {, e.g. individual nozzles (nozzle boxes F01D9/047)} · CPC title

• F05D2230/60

  Assembly methods · CPC title

• F04D29/685

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

• F04D27/0207

  by bleeding, bypassing or recycling fluids (influencing the boundary layer by an uncontrolled bleeding of the working fluid F04D29/681) · CPC title

• F04D29/684

  by fluid injection · CPC title