Separator drum and compressor impeller assembly

• US 8,302,779 B2
• Filed: 09/21/2007
• Issued: 11/06/2012
• Est. Priority Date: 09/21/2006
• Status: Active Grant

• Current Assignee: Dresser-Rand Group Incorporated (Siemens AG)
• Original Assignee: Dresser-Rand Group Incorporated (Siemens AG)
• Inventors: Maier, William C.
• Primary Examiner(s): Reifsnyder, David A
• Application Number:
  US12/441,804
• Publication Number:
  US 20100038309A1
• Time in Patent Office: 1,873 Days
• Field of Search: 210/360.1, 210/380.3, 554/38, 554/47, 962/08, 963/01, 963/05, 494/50, 494/51
• US Class Current: 210/380.3
• CPC Class Codes: B01D 45/14 generated by rotating vanes, discs, drums or brushes
• CPC Class Codes: F04D 29/2277 for increasing NPSH or dealing with liquids near boiling-point
• CPC Class Codes: F04D 29/2288 for comminuting, mixing or separating

Abstract

A fluid handling assembly is for a fluid machine that includes a casing and a shaft disposed within the casing so as to be rotatable about a central axis. An impeller is mounted on the shaft and has an inlet and a rotary separator is mounted on the shaft and has axially spaced apart inlet and outlet ends and an interior separation chamber. The separator is coupled with the impeller such that the separator and the impeller generally rotate as a single unit about the shaft axis and fluid within the separation chamber flows from the separator outlet end directly into the impeller inlet. Preferably, the separator includes a plurality of generally radially-extending blades disposed proximal to the separator inlet end and spaced circumferentially about the axis, the plurality of blades being configured to accelerate fluid flowing into the separator inlet end during rotation of the separator.

Claims

1. A fluid handling assembly for a fluid machine, comprising:

an impeller mounted on a shaft and having an impeller inlet; and

a rotary separator mounted on the shaft and having a separator inlet end, a separator outlet end axially spaced apart from the separator inlet end, and an interior separation chamber, wherein the rotary separator is coupled with the impeller such that a fluid within the interior separation chamber flows from the separator outlet end directly into the impeller inlet.

2. The fluid handling assembly of claim 1, wherein the rotary separator and the impeller rotate as a single unit about a central axis of the fluid machine.

3. The fluid handling assembly of claim 1, wherein the rotary separator is configured to remove at least a portion of a liquid from the fluid flowing through the separator inlet end, the interior separation chamber, and the separator outlet end, and into the impeller inlet.

4. The fluid handling assembly of claim 1, wherein:

the impeller has an impeller end surface located proximal to the impeller inlet and extending circumferentially about a central axis of the fluid machine; and

the rotary separator has a separator end surface located proximal to the separator outlet end, extending circumferentially about the central axis, disposed against the impeller end surface so as to define an interface, wherein the rotary separator is sealingly coupled with the impeller at the interface.

5. The fluid handling assembly of claim 1, wherein:

the impeller includes a shroud having a radially-extending shroud outer surface and a shroud central opening that at least partially defines the impeller inlet; and

the separator outlet end is disposed against the radially-extending shroud outer surface, or at least partially disposed within the shroud central opening.

6. The fluid handling assembly of claim 5, wherein the rotary separator further comprises:

a tubular body having a tubular body inner surface; and

an annular ledge spaced radially inward from the tubular body, disposed within the shroud central opening, extending axially from the tubular body, and defining the separator outlet end.

7. The fluid handling assembly of claim 6, wherein:

the shroud has a shroud edge surface defining the shroud central opening;

the tubular body has a tubular body outer surface;

the annular ledge has an outer circumferential surface spaced radially inward from the tubular body outer surface, such that a radial shoulder surface extends between the tubular body outer surface and the outer circumferential surface; and

the shroud edge surface is disposed against the radial shoulder surface.

8. The fluid handling assembly of claim 1, wherein the impeller further comprises:

a hub mounted on the shaft;

a plurality of vanes each having a first side edge connected with the hub and a second side edge that opposes the first side edge, wherein the plurality of vanes are spaced circumferentially apart around a central axis of the fluid machine; and

a shroud connected to the second side edge of each of the plurality of vanes, spaced axially from the hub and radially outward from the shaft, the shroud having a shroud central opening spaced radially outward from the shaft so as to define the impeller inlet, wherein the separator outlet end is connected with the shroud such that the interior separation chamber is fluidly coupled with the shroud central opening.

9. The fluid handling assembly of claim 8, wherein:

the hub and the shroud each have inner and outer edges extending circumferentially about the central axis;

each of the plurality of vanes has an inner end located proximal to the inner edge of the hub and the inner edge of the shroud, and an outer end located proximal to the outer edge of the hub and the outer edge of the shroud; and

the impeller further comprises a plurality of flow channels each defined between the plurality of vanes and extending between the inner and outer ends of each of the plurality of vanes such that the fluid entering the impeller inlet flows through at least one of the plurality of flow channels and radially outward beyond the outer edge of the hub and the outer edge of the shroud.

10. The fluid handling assembly of claim 1, wherein the rotary separator further comprises a separator tubular body having inner circumferential surface at least partially defining the interior separation chamber, and an outer circumferential surface, wherein the inner circumferential surface is configured to separate a liquid from the fluid contacting the inner circumferential surface during rotation of the rotary separator.

11. The fluid handling assembly of claim 10, wherein the rotary separator further comprises a deflector member mounted to the shaft and having an outer surface spaced radially inward from the inner circumferential surface of the separator tubular body, wherein the deflector member is configured to direct liquids contacting the outer surface toward the inner circumferential surface.

12. The fluid handling assembly of claim 11, wherein:

the deflector member further comprises a deflector tubular body having opposing ends, a body outer surface, a through bore extending between the opposing ends and sized to receive a portion of the shaft, and an enlarged central portion; and

the body outer surface has an outside diameter that varies between a minimum value proximal to each of the opposing ends and a maximum value at the enlarged central portion.

13. The fluid handling assembly of claim 10, wherein the separator tubular body includes at least one opening extending radially between the inner and outer circumferential surfaces and providing a liquid outlet passage for directing the liquid out of the interior separation chamber.

14. The fluid handling assembly of claim 13, wherein the separator tubular body further comprises:

an annular groove extending radially inward from the inner circumferential surface; and

a plurality of openings extending radially between the annular groove and the outer circumferential surface and spaced circumferentially apart around a central axis of the fluid machine.

15. The fluid handling assembly of claim 10, wherein the inner circumferential surface of the separator tubular body further comprises a frustoconical section facing away from the separator outlet end and having a first circumferential edge located proximal to the separator outlet end and a second circumferential edge that is radially larger than the first circumferential edge and is spaced axially from the first circumferential edge, wherein the frustoconical section is configured to direct fluid contacting the frustoconical section radially outward and away from the separator outlet end during rotation of the rotary separator.

16. The fluid handling assembly of claim 1, wherein the rotary separator further comprises a plurality of blades disposed proximal to the separator inlet end and spaced circumferentially about a central axis of the fluid machine, wherein the plurality of blades are configured to accelerate the fluid flowing into the separator inlet end during rotation of the rotary separator.

17. The fluid handling assembly of claim 1, wherein the rotary separator further comprises:

an inlet member providing the separator inlet end and including an annular hub mounted on the shaft, an annular outer wall spaced radially outward from the annular hub, and a plurality of blades extending radially between the annular hub and the annular outer wall; and

a tubular drum member having a first end connected to the inlet member, a second end spaced axially from the first end, providing the separator outlet, and connected with the impeller, and an inner circumferential surface defining the interior separation chamber and fluidly connected to the impeller inlet.

18. The fluid handling assembly of claim 1, further comprising a static separator disposed about the rotary separator and having a static separator inner circumferential surface spaced radially outward from the rotary separator so as to define an annular flow passage that is fluidly coupled with the separator inlet end.

19. The fluid handling assembly of claim 18, wherein the static separator further comprises a radially extending wall spaced axially apart from the separator inlet end, wherein the fluid flows through the annular flow passage in a first axial direction, and the radially extending wall is configured to direct fluid exiting the annular flow passage to flow in a second, opposing direction into the separator inlet end.

20. A fluid handling assembly, comprising:

an impeller mounted on a shaft and having an impeller inlet and an impeller outlet;

a rotary separator mounted on the shaft and having a separator inlet end, a separator outlet end that is axially spaced apart from the separator inlet end and is attached to the impeller inlet, and an interior separation chamber extending between the separator inlet end and the separator outlet end, wherein the rotary separator and the impeller rotate on the shaft as a single unit; and

a static separator defined around the rotary separator, fluidly connected with the separator inlet end, and having a static separator inner circumferential surface spaced radially apart from the rotary separator defining an annular passage therebetween, and an annular wall disposed at an axial end of the static separator such that a fluid traveling through the static separator proceeds through the static separator in a first axial direction and is turned by the annular wall to travel through the rotary separator in a second axial direction that opposes the first axial direction.