CENTRIFUGAL IMPELLER AND TURBOMACHINE

• US 20130039769A1
• Filed: 11/22/2010
• Published: 02/14/2013
• Est. Priority Date: 11/23/2009
• Status: Active Grant

• Current Assignee: Nuovo Pignone Tecnologie SRL (Baker Hughes Company)
• Original Assignee: Nuovo Pignone SPA (Baker Hughes Company)
• Inventors: Giannozzi, Massimo, Giovannetti, Iacopo, Massini, Andrea, Aksel, Bulent, Lanaud, Christophe, O'Flynn, Julian, Finn, Scott
• Granted Patent: US 9,816,518 B2
• Time in Patent Office: Days
• US Class Current: 416/186.R
• CPC Class Codes: F04D 29/023 especially adapted for elastic fluid pumps
• CPC Class Codes: F04D 29/026 especially adapted for liquid pumps
• CPC Class Codes: F04D 29/2227 for special materials
• CPC Class Codes: F04D 29/2294 for protection, e.g. against abrasion
• CPC Class Codes: F04D 29/284 for compressors
• CPC Class Codes: F04D 29/289 having provision against erosion or for dust-separation
• CPC Class Codes: F05C 2253/02 Fabric
• CPC Class Codes: F05D 2300/601 Fabrics
• CPC Class Codes: F05D 2300/6034 Orientation of fibres, weaving, ply angle
• CPC Class Codes: F05D 2300/614 Fibres or filaments

Abstract

A centrifugal impeller for a turbomachine is provided. The centrifugal impeller comprises a plurality of aerodynamic vanes, each of the aerodynamic vanes having internal walls on which is associated a fabric element.

Claims

1. A centrifugal impeller for a turbomachine comprising a plurality of aerodynamic vanes, each of the aerodynamic vanes having internal walls on which is associated a fabric element.

2. The impeller of claim 1, wherein the fabric element of each of the plurality of aerodynamic vanes is configured to surround each of the aerodynamic vanes.

3. The impeller of claim 1, wherein a second fabric element is configured to surround alternately an upper wall of a vane and a lower wall of an adjacent vane passing along a respective impeller blade there between.

4. The impeller of claim 1, wherein a third fabric element has a conical surface with fabric blades stretching out from the surface.

5. The impeller of claim 1, comprising at least one of:

a fourth fabric element associated over the aerodynamic vanes;

the fourth element having substantially a centrifugal shroud shape and function;

a fifth fabric element provided to realize substantially a rear-plate for the finished impeller;

the fifth element having substantially an annular planar shape;

a sixth fabric element associated under the aerodynamic vanes;

the sixth element having substantially an annular shape able to be matched with an external inferior surface of the aerodynamic vanes;

a seventh fabric element associated around an axial hole used to associate a rotor for the turbomachine;

a segmented fabric element able to be fitted inside the space at the corner of shaped slots of the vanes to increase the rigidity of the whole assembly of the finished impeller, eliminate preferential flowpaths for the filling material, and avoid regions containing only filling material with no fiber where cracking might initiate during cure; and

a shaped component associated inside each of the aerodynamic vanes in order to act against the erosion of the working fluid.

6. The impeller of claim 1, wherein the fabric element elements of each of the plurality of aerodynamic vanes is impregnated with a filling material.

7. The impeller of claims 1, wherein an inner core element is associated under the aerodynamic vanes in order to facilitate the manufacturing process of the impeller.

8. The impeller of claim 7, wherein the inner core element is surrounded by at least one of a fourth fiber element, a fifth fiber element, a sixth fiber element, and a seventh fiber element.

9. The impeller of claim 1, wherein the fabric element of each of the plurality of aerodynamic vanes is made by a plurality of unidirectional or multidirectional fibers, realized substantially to have a high anisotropy along at least a preferential direction.

10. A turbomachine comprising a plurality of aerodynamic vanes, each of them having internal walls on which is associated a fabric element.