Michael V Drexel

US Patent:

8419398, Apr 16, 2013

Filed:

Apr 30, 2009

Appl. No.:

12/433515

Inventors:

Vasanth Kothnur - Clifton Park NY, US
David Deloyd Anderson - Glenville NY, US
Farshad Ghasripoor - Glenville NY, US
Michael V. Drexel - Delanson NY, US
Thomas Steen - Ballston Spa NY, US
Hrishikesh Vishvas Deo - Guilderland NY, US

Assignee:

General Electric Company - Niskayuna NY

International Classification:

F03C 2/00
F03C 4/00
F04C 2/00

US Classification:

418202, 418 98, 418102, 418152, 417366

Abstract:

In a pump system, a process fluid is directed into inlet chambers of a pump casing at an inlet pressure, and a plurality of rotors disposed inside the pump casing are rotated to pump the process fluid from the inlet chambers to an outlet chamber located between the inlet chambers, wherein the process fluid in the outlet chambers is at an outlet pressure. The process fluid is directed from the outlet chamber to a separator configured to separate particulate matter from the process fluid, and a portion of separated process fluid is directed from the separator to a gear chamber of the pump. Pump bearings are lubricated with the portion of separated process fluid from the gear chamber. Some of the portion of the separated process fluid from the pump bearing is leaked to the inlet chambers via rotor shrouds to reduce accumulation of particulate matter in the inlet chambers.

US Patent:

20080138195, Jun 12, 2008

Filed:

Dec 6, 2006

Appl. No.:

11/567490

Inventors:

John Michael Kern - Rexford NY, US
Michael V. Drexel - Delanson NY, US
Jeremy Daniel VanDam - W. Coxsackie NY, US

Assignee:

GE AIRCRAFT ENGINES - Cincinnati OH

International Classification:

F01D 15/12

US Classification:

4151221

Abstract:

A system for transferring mechanical torque variably between a plurality of rotating machines in a turbofan engine. Two devices are used, where the first device relies upon magnetic properties of a planetary magnetic gearbox to couple the magnetic machines. The second device is used to variably control the torque transfer between the magnetic machines. The system couples rotating shafts rotating at differing speeds within a turbofan engine for controllably transferring power. To transfer power in the system, a fixed gear ratio is obtained by coupling the relatively high- and low-speed engine shafts to an epicyclic magnetic gearbox.

US Patent:

20080309019, Dec 18, 2008

Filed:

Jun 13, 2007

Appl. No.:

11/762531

Inventors:

Christopher Edward Wolfe - NISKAYUNA NY, US
Kartik Mangudi Varadarajan - CAMBRIDGE MA, US
Mohsen Salehi - Rancho Palos Verdes CA, US
Bugra Han Ertas - ALBANY NY, US
Michael Vincent Drexel - DELANSON NY, US
Biao Fang - CLIFTON PARK NY, US

Assignee:

GENERAL ELECTRIC COMPANY - SCHENECTADY NY

International Classification:

F16J 15/00

US Classification:

277420, 277355, 277411, 277580, 418149

Abstract:

A sealing assembly is provided. The sealing assembly includes a foil disposed circumferentially around a rotating component and configured to provide primary sealing to the rotating component between high pressure and low pressure sides and a spring system disposed adjacent to the foil. The spring system includes a plurality of features to facilitate foil surface to follow excursions of the rotating component, wherein the plurality of features provide secondary sealing from the high pressure to the low pressure sides between the foil and a stationary component.

US Patent:

20090098003, Apr 16, 2009

Filed:

Oct 11, 2007

Appl. No.:

11/870466

Inventors:

Vasanth Srinivasa Kothnur - Clifton Park NY, US
Michael Vincent Drexel - Delanson NY, US
David Deloyd Anderson - Glenville NY, US
Darren Lee Hallman - Scotia NY, US
Ronghai Qu - Clifton Park NY, US
Hrishikesh Vishvas Deo - Guilderland NY, US
Farshad Ghasripoor - Scotia NY, US

Assignee:

GENERAL ELECTRIC COMPANY - SCHENECTADY NY

International Classification:

F01C 1/12

US Classification:

418205

Abstract:

A twin screw pump includes a pair of rotors disposed inside a casing having an inlet and an outlet. Each rotor includes a set of threads disposed on a portion of an outer surface of a shaft. A first bearing is coupled at a first end of the shaft and a second bearing is coupled at a second end of the shaft. The first and second bearings are not separated by one or more seals. The first and second bearings are configured for being lubricated by the liquid medium of the process fluid when the twin screw pump is in an operational mode.

US Patent:

20100278671, Nov 4, 2010

Filed:

Apr 30, 2009

Appl. No.:

12/433441

Inventors:

Farshad Ghasripoor - Glenville NY, US
Michael V. Drexel - Delanson NY, US
Vasanth Kothnur - Clifton Park NY, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

F04C 29/02
F04C 2/16
B23P 11/00

US Classification:

418 1, 418191, 418 88, 418 89, 29888023

Abstract:

A screw pump system has a plurality of rotors disposed inside a pump casing. Each rotor comprises a shaft and a set of threads disposed on the shaft configured to mesh with at least one other set of threads. A plurality of bearings are coupled to each end of each of the rotors. A plurality of gears are coupled to an end of each of the rotors. The gears are configured to reduce a size of particulates in a lubrication fluid by flowing the particulates through the rotating gears. The gears may serve as timing gears for the rotors as well as perform pumping of the lubrication fluid.

US Patent:

20100278672, Nov 4, 2010

Filed:

Apr 30, 2009

Appl. No.:

12/433490

Inventors:

Vasanth Kothnur - Clifton Park NY, US
David Deloyd Anderson - Glenville NY, US
Michael V. Drexel - Delanson NY, US
Thomas Steen - Ballston Spa NY, US
Farshad Ghasripoor - Glenville NY, US
Hrishikesh Vishvas Deo - Guilderland NY, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

F04C 15/00
F04C 2/14

US Classification:

418 1, 418205

Abstract:

A pump system includes inlet chambers, an outlet chamber, and rotors disposed inside the inlet chambers and the outlet chamber to pump a process fluid from the inlet chambers to the outlet chamber and to direct the process fluid to a separator. A gear chamber is configured to receive a portion of the process fluid from the separator. First and second sets of pump bearings are coupled to the rotors and lubricated by the portion of the process fluid flowing from the gear chamber. A conduit is configured to direct the portion of the process fluid from the pump bearings back to the gear chamber. Some of the portion of the process fluid lubricating the pump bearings is permitted to leak to the inlet chambers. Additional process fluid is continually added to the portion of the process fluid to compensate for fluid leaking to the inlet chambers.

US Patent:

20110103987, May 5, 2011

Filed:

Nov 4, 2009

Appl. No.:

12/612005

Inventors:

Vasanth Srinivasa Kothnur - Clifton Park NY, US
David Deloyd Anderson - Glenville NY, US
Farshad Ghasripoor - Glenville NY, US
Hrishikesh Vishvas Deo - Saratoga Springs NY, US
Michael V. Drexel - Delanson NY, US
Thomas Lowell Steen - Ballston Spa NY, US

Assignee:

GENERAL ELECTRIC COMPANY - SCHENECTADY NY

International Classification:

F04C 2/16
B23P 11/00

US Classification:

418 1, 418202, 29888023

Abstract:

The present invention provides a pump system comprising a bearing housing coupled to a pump liner, the pump liner defining a fluid conduit, the pump liner comprising a fluid inlet and a fluid outlet; and at least one rotor having a first rotor portion and a second rotor portion, the first rotor portion being disposed within the fluid conduit and the second rotor portion being disposed within the bearing housing; the first rotor portion comprising a first conveying stage adjacent to the bearing housing, and a second conveying stage adjacent to the first conveying stage, the first and second conveying stages being configured to convey a fluid, the first conveying stage being configured to convey the fluid from the bearing housing into the fluid conduit. The new pump systems rely on a dynamic restriction to reduce the need for mechanical seals between bearing housings and raw process fluid.

US Patent:

20130264775, Oct 10, 2013

Filed:

May 31, 2013

Appl. No.:

13/906942

Inventors:

Biao Fang - Clifton Park NY, US
Bugra Han Ertas - Niskayuna NY, US
Kartik Mangudi Varadarajan - Belmont MA, US
Michael Vincent Drexel - Delanson NY, US
Mohsen Salehi - San Antonio TX, US

International Classification:

F16J 15/34

US Classification:

277545

Abstract:

A sealing assembly is provided. The sealing assembly includes a foil disposed circumferentially around a rotating component and configured to provide primary sealing to the rotating component between high pressure and low pressure sides and a spring system disposed adjacent to the foil. The spring system includes a plurality of features to facilitate foil surface to follow excursions of the rotating component, wherein the plurality of features provide secondary sealing from the high pressure to the low pressure sides between the foil and a stationary component.