Manoj Gupta

US Patent:

8596954, Dec 3, 2013

Filed:

Jun 28, 2011

Appl. No.:

13/521793

Inventors:

Manoj K. Gupta - Houston TX, US
Jose L. Gilarranz - Katy TX, US
Steven Nove - Houston TX, US
Kenneth Devito - Rockport TX, US

Assignee:

Dresser-Rand Company - Olean NY

International Classification:

F04D 25/00
F04D 29/10

US Classification:

415 1, 415112, 415230

Abstract:

A compressor is disclosed having a shaft seal assembly and system that allows a high-pressure compressor to settle-out at a lower pressure level during shutdown. The seal assembly may be disposed about a portion of the shaft and define a blow-down seal chamber, the seal assembly including one or more gas seals in fluid communication with the blow-down seal chamber. A blow-down line is communicably coupled to the blow-down seal chamber to reference the blow-down seal chamber to a low pressure reference, such as a separate centrifugal compressor, or the like. Referencing the blow-down seal chamber to the low pressure reference reduces the required sealing pressure of the one or more gas seals. A valve may be disposed in the blow-down line and configured to regulate a flow of process gas leakage through the blow-down line.

US Patent:

20140191475, Jul 10, 2014

Filed:

Mar 23, 2012

Appl. No.:

14/005592

Inventors:

Manoj K. Gupta - Houston TX, US
Steven Nove - Houston TX, US
Thomas Soulas - Houston TX, US
Krishnaswamy Ramesh - Katy TX, US
Glenn Grosso - Olean NY, US

Assignee:

DRESSER-RAND COMPANY - Olean NY

International Classification:

F01D 11/02

US Classification:

277301, 277411

Abstract:

A seal for a turbomachine is disclosed. The seal assembly includes a rotatable shaft having a stepped outer circumferential surface that defines one or more annular protrusions axially-spaced thereon. A seal is radially-offset dially-offset from the rotatable shaft and has one or more annular recesses that extend radially-outward from the inner circumferential surface of the seal. A plurality of holes are defined in both the inner circumferential surface and the one or more annular recesses of the seal, the one or more annular recesses being axially-spaced from each other and configured to receive the one or more annular protrusions in an interlocking fit.