Sealing arrangement for axially split turbomachines

Patent metadata

Field	Value
Publication number	US-9810233-B2
Application number	US-201314653943-A
Country	US
Kind code	B2
Filing date	Dec 17, 2013
Priority date	Dec 21, 2012
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

An axially-split turbomachine comprising a casing comprised of a first casing portion and a second casing portion, forming a housing for a rotor arranged for rotation therein. The rotor comprises a shaft and at least one impeller mounted on the shaft. The casing comprises at least one shaft passageway through which the shaft extends from the interior of the casing towards the exterior of the casing. The sealing arrangement comprises a linear sealing member, extending between the first and the second casing portions. The sealing arrangement further comprises at least one sealing ring portion surrounding said at least one shaft passageway. The sealing ring portion and the linear sealing member form a continuous sealing body.

First claim

What is claimed is:

1. An axially-split turbomachine comprising:
a casing comprising a first casing portion with a first contact surface and a second casing portion with a second contact surface;
a sealing arrangement between the first casing portion and the second casing portion;
a rotor arranged for rotation in the casing, the rotor comprising a shaft and at least one impeller mounted on the shaft; and
at least one shaft passageway through the casing, the shaft extending through the shaft passageway,
wherein the sealing arrangement comprises:
a linear sealing member, extending between the first contact surface and the second contact surface, and
at least one sealing ring portion surrounding the at least one shaft passageway,
wherein the at least one sealing ring portion and the linear sealing member form a continuous sealing body.

2. The turbomachine of claim 1 , further comprising a plurality of bolts connecting the first casing portion and the second casing portion to one another, wherein the linear sealing member is arranged between the rotor and the bolts.

3. The turbomachine of claim 1 , further comprising at least one mechanical seal sleeve arranged in the at least one shaft passageway, the shaft extending through the mechanical seal sleeve, wherein the sealing ring portion is arranged around the mechanical seal sleeve.

4. The turbomachine of claim 3 , wherein the mechanical seal sleeve comprises an external annular groove, partly housing the sealing ring portion.

5. The turbomachine of claim 3 , wherein:
the casing further comprises two shaft passageways, arranged at opposite ends of the casing, two end portions of the shaft extending through the two shaft passageways,
a mechanical seal sleeve is arranged in each shaft passageway, between the casing and the shaft,
the sealing arrangement comprises two sealing ring portions, each being arranged around a respective one of the mechanical seal sleeves, and
the sealing ring portions are connected to the linear sealing member, forming a continuous sealing arrangement therewith, the continuous sealing arrangement surrounding the rotor and the two mechanical seal sleeves.

6. The turbomachine of claim 1 , wherein the linear sealing member comprises two linear sealing portions connected to one another by at least one the sealing ring portion.

7. The turbomachine of claim 5 , wherein each sealing ring portion is connected to the linear sealing member by respective T joints.

8. The turbomachine of claim 5 , wherein each mechanical seal sleeve comprises an external annular groove, partly housing the respective sealing ring portion.

9. The turbomachine of claim 1 , wherein:
at least one of the first contact surface and the second contact surface comprises a groove, and
the linear sealing member is partially housed in the groove.

10. The turbomachine of claim 1 , wherein both the first contact surface and the second contact surface are provided with respective grooves, and the linear sealing member is at least partly housed in the grooves.

11. The turbomachine of claim 1 , wherein the at least one shaft passageway comprises an annular groove, the at least one sealing ring portion being at least partly housed in the annular groove.

12. The turbomachine of claim 5 , wherein each shaft passageway comprises a respective annular groove, and wherein the sealing ring portions are at least partly housed in the respective annular grooves.

13. The turbomachine of claim 2 , further comprising at least one mechanical seal sleeve arranged in the at least one shaft passageway, the shaft extending through the mechanical seal sleeve, wherein the sealing ring portion is arranged around the mechanical seal sleeve.

14. The turbomachine of claim 13 , wherein the mechanical seal sleeve comprises an external annular groove, partly housing the sealing ring portion.

15. The turbomachine of claim 14 , wherein:
the casing further comprises two shaft passageways, arranged at opposite ends of the casing, two end portions of the shaft extending through the two shaft passageways,
a mechanical seal sleeve is arranged in each shaft passageway, between the casing and the shaft,
the sealing arrangement comprises two sealing ring portions, each being arranged around a respective one of the mechanical seal sleeves, and
the sealing ring portions are connected to the linear sealing member, forming a continuous sealing arrangement therewith, the continuous sealing arrangement surrounding the rotor and the two mechanical seal sleeves.

16. The turbomachine of claim 4 , wherein:
the casing further comprises two shaft passageways, arranged at opposite ends of the casing, two end portions of the shaft extending through the two shaft passageways,
a mechanical seal sleeve is arranged in each shaft passageway, between the casing and the shaft,
the sealing arrangement comprises two sealing ring portions, each being arranged around a respective one of the mechanical seal sleeves, and
the sealing ring portions are connected to the linear sealing member, forming a continuous sealing arrangement therewith, the continuous sealing arrangement surrounding the rotor and the two mechanical seal sleeves.

17. The turbomachine of claim 6 , wherein each sealing ring portion is connected to the linear sealing member by respective T joints.

18. The turbomachine of claim 6 , wherein each mechanical seal sleeve comprises an external annular groove, partly housing the respective sealing ring portion.

19. The turbomachine of claim 7 , wherein each mechanical seal sleeve comprises an external annular groove, partly housing the respective sealing ring portion.

20. The turbomachine of claim 6 , wherein each shaft passageway comprises a respective annular groove, and wherein the sealing ring portions are at least partly housed in the respective annular grooves.

Assignees

• Nuovo Pignone Srl

Inventors

• Del Vescovo Carlo
• Rip Donato Antonio
• Milone Fabrizio

Classifications

• F05D2240/55

  Seals · CPC title

• F04D29/043

  Shafts · CPC title

• F02C7/28

  Arrangement of seals · CPC title

• F01D25/243 Primary

  Flange connections; Bolting arrangements (F01D25/265 takes precedence) · CPC title

• F04D29/28

  for centrifugal or helico-centrifugal pumps {for radial-flow or helico-centrifugal pumps} · CPC title