Diffuser having detachable vanes with positive lock

• US 9,394,916 B2
• Filed: 07/31/2013
• Issued: 07/19/2016
• Est. Priority Date: 07/19/2010
• Status: Active Grant

• Current Assignee: Ingersoll-Rand Industrial U.S., Inc. (Ingersoll Rand, Inc.)
• Original Assignee: Ingersoll-Rand Company (Trane Technologies plc)
• Inventors: Small, Robert C., Herr, Charles F., O'Neill, David N.
• Primary Examiner(s): Kershteyn, Igor
• Application Number:
  US13/955,724
• Publication Number:
  US 20130315741A1
• Time in Patent Office: 1,084 Days
• US Class Current: 1/1
• CPC Class Codes: F04D 25/163 driven by a common gearing arrangement
• CPC Class Codes: F04D 29/44 Fluid-guiding means, e.g. diffusers
• CPC Class Codes: F04D 29/444 Bladed diffusers
• CPC Class Codes: F04D 29/624 especially adapted for elastic fluid pumps
• CPC Class Codes: F05D 2250/52 Outlet

Abstract

A system, in certain embodiments, includes a centrifugal compressor diffuser that includes an elliptical plate including multiple vane receptacles disposed about an axis of the plate and multiple detachable vanes attached to the plate. Each vane receptacle includes a first two dimensional (2D) projection along a plane of the elliptical plate and each detachable vane includes a second two dimensional (2D) projection along a base portion of the vane, where each detachable vane is disposed in a respective vane receptacle with the first and second 2D projections blocking movement of the detachable vane in at least a first axial direction relative to the elliptical plate. In certain embodiments, the first and second 2D projections may include a first tab to fit in a recess between a pair of second tabs, respectively, or vice versa. However, in other embodiments, the first and second 2D projections may include alternative mating surfaces.

Claims

1. A system, comprising:

a centrifugal compressor diffuser, comprising;

a base portion; and

a plurality of detachable vanes attached to the base portion, the plate having a plurality of receptacles for receipt of each of the detachable vanes, and an interface formed between the receptacles and the vanes when the detachable vanes are engaged with the receptacles of the plate, wherein each detachable vane comprises a cross-sectional profile that varies along a span of the detachable vane, wherein each of the plurality of receptacles comprises a plurality of first two-dimensional mounts that engage along the interface with a plurality of second two-dimensional mounts of the respective plurality of detachable vanes, the first two-dimensional mounts and the second two-dimensional mounts extending along the length of the interface and having a projection in a direction transverse to the interface.

2. The system of claim 1, wherein the base portion comprises an elliptical plate.

3. The system of claim 1, wherein the plurality of first two-dimensional mounts of the plurality of receptacles interlock with the plurality of second two-dimensional mounts of the respective plurality of detachable vanes.

4. The system of claim 3, wherein each first 2D mount of the plurality of first 2D mounts couples to a mating second two-dimensional mount of the plurality of second two-dimensional mounts corresponding to a respective vane of the plurality of detachable vanes to create an interlocked connection.

5. The system of claim 4, wherein each interlocked connection blocks axial separation of the respective vane relative to the base portion.

6. The system of claim 4, wherein each first two-dimensional mount engages and disengages with the mating second two-dimensional mount in a crosswise direction relative to an axis of the base portion.

7. The system of claim 4, wherein each first two-dimensional mount engages and disengages with the mating second two-dimensional mount along an inner circumference of the base portion.

8. The system of claim 7, comprising an inner blocking structure disposed along the inner circumference of the base portion.

9. The system of claim 4, wherein each first two-dimensional mount engages and disengages with the mating second two-dimensional mount along an outer circumference of the base portion.

10. The system of claim 9, comprising an outer blocking structure disposed along the outer circumference of the base portion.

11. The system of claim 4, wherein each interlocked connection comprises a projection disposed in a receptacle.

12. The system of claim 1, comprising a centrifugal compressor having the centrifugal compressor diffuser.

13. A system, comprising:

a centrifugal compressor diffuser vane protruding from a base, the base oriented transverse to the vane, wherein the centrifugal compressor diffuser vane comprises a cross-sectional profile that varies along a span of the centrifugal compressor diffuser vane, and the centrifugal compressor diffuser vane comprises a first two dimensional mount formed at an outer edge of the base and configured to couple to a second two dimensional mount of a base portion of a centrifugal compressor diffuser.

14. The system of claim 13, comprising the centrifugal compressor diffuser having the centrifugal compressor diffuser vane.

15. The system of claim 14, which further includes a blocking structure abutting the centrifugal compressor diffuser vane to further discourage movement in the axial direction.

16. The system of claim 13, wherein the first and second two-dimensional mounts comprise mating tapered surfaces, mating contoured surfaces, or mating stepped surfaces.

17. The system of claim 13, wherein the first and second two-dimensional mounts engage and disengage with one another in a crosswise direction relative to an axis of the base portion.

18. The system of claim 13, wherein the first and second two-dimensional mounts block axial movement relative to an axis of the base portion.

19. A system, comprising:

a plate comprising a plurality of first circumferentially extending mounts; and

a plurality of detachable vanes comprising a respective plurality of second mounts, wherein each second mount of the plurality of second mounts engages with a mating first mount of the plurality of first mounts along an interface oriented in a radial direction to provide an interlocked connection along the interface, and the interlocked connection blocks separation of the first and second mounts in an axial direction crosswise to the radial direction.

20. The system of claim 19, wherein the plurality of first mounts extend inwardly from an outer circumference of the plate, outwardly from an inner circumference of the plate, or a combination thereof.