Christopher L Ross

US Patent:

6661207, Dec 9, 2003

Filed:

Dec 17, 2001

Appl. No.:

10/024694

Inventors:

Robert J. Nelson - Orlando FL
Christopher W. Ross - Oviedo FL

Assignee:

Siemens Westinghouse Power Corporation - Orlando FL

International Classification:

H02P 944

US Classification:

322 29, 322 20, 307 87, 323211

Abstract:

An apparatus and method for protecting synchronous generators against off-nominal frequency deviation and alternating forces excitation is provided. Particular application can be found with generators within a power generator plant integrated into a power transmission grid system. A electrical relay system is in operative association with an electrical signal representative of an actual frequency at which the generator is operating and to an electrical signal representative of an actual forcing amount at which the generator is operating. The relay system is adapted to respond to the actual frequency signal and the actual forcing signal such that the relay system compares the actual frequency signal with a predetermined desired frequency range and compares the actual forcing signal with at least one predetermined forcing amount, and selectively alarms the unit operator or trips the generator to an off-line mode depending upon the comparisons.

US Patent:

6688802, Feb 10, 2004

Filed:

Sep 10, 2001

Appl. No.:

09/950497

Inventors:

Christopher W. Ross - Oviedo FL
Keith McLaurin - Orlando FL

Assignee:

Siemens Westinghouse Power Corporation - Orlando FL

International Classification:

F16B 2114

US Classification:

403337

Abstract:

An industrial coupling ( ) and associated methods are provided which are adapted to be positioned to connect a first shaft ( ) of a portion ( ) of an industrial system ( ) to a second shaft ( ) of a portion ( ) of an industrial system ( ) so that an industrial member ( ) having an opening formed therein and having a preselected opening diameter can be readily positioned over the coupling ( ). The industrial coupling ( ) preferably has a first coupler portion ( ) mounted to and integrally formed with the first shaft ( ) and having a first diameter less than the preselected opening diameter of the industrial member ( ) so that the industrial member ( ) can readily be positioned over the first coupler portion ( ) and onto the first shaft ( ). The industrial coupler ( ) preferably also has a second coupler portion ( ) adapted to be mounted on the first coupler portion ( ) and having a second diameter greater than the preselected opening diameter of the industrial member ( ) when mounted on the first coupler portion ( ) so that the industrial member ( ) after being positioned onto the first shaft ( ) cannot be readily positioned over the coupling ( ).

US Patent:

6833640, Dec 21, 2004

Filed:

Dec 7, 2000

Appl. No.:

09/731501

Inventors:

Raul Rico - Oviedo FL
Christopher W. Ross - Oviedo FL
Richard B. Chianese - Altamonte Springs FL
Kevin M. Light - Maitland FL

Assignee:

Siemens Westinghouse Power Corporation - Orlando FL

International Classification:

H02K 704

US Classification:

310 51, 310261

Abstract:

A method and apparatus for tuning the torsional natural frequency of a rotor is disclosed. At least one tuning slot is formed within the winding slots defined by radially projecting winding teeth. The tuning slot extends radially inward from the bottom of the winding slot a distance to tune the rotor to a desired torsional natural frequency. This tuning slot can be positioned preferably at the quadrature axis.

US Patent:

7165889, Jan 23, 2007

Filed:

Jan 27, 2005

Appl. No.:

11/044792

Inventors:

Kevin M. Light - Maitland FL, US
Bern Luneburg - Mulheim an der Ruhr, DE
Christopher W. Ross - Oviedo FL, US

Assignee:

Siemens Power Generation, Inc. - Orlando FL

International Classification:

F16C 17/02

US Classification:

384115, 384292

Abstract:

An oil lift pocket for a bearing surface having a plurality of channels in communication with a supply port. The plurality of channels may be formed in a substantially bow shaped configuration. Each channel may extend from a supply port and terminate at an end and away from the supply port. The oil lift pocket greatly reduces friction in slow turning operations and reduces babbitt delamination, dead zones, and nonuniform support and lift as well.

US Patent:

8573932, Nov 5, 2013

Filed:

Aug 9, 2010

Appl. No.:

12/852720

Inventors:

Christopher W. Ross - Oviedo FL, US
Keith A. Miller - Oviedo FL, US

Assignee:

Siemens Energy, Inc. - Orlando FL

International Classification:

F01D 25/10

US Classification:

415177

Abstract:

The compressor blade root heating system may be formed from one or more induction heaters formed from one or more induction coils positioned in close proximity to a root of a compressor blade. In one embodiment, the induction heater may be coupled to a static casing component positioned immediately upstream of a first row of compressor blades on a rotor assembly such that the induction heater is stationary during turbine engine operation. The induction heater causes eddy current formation, which heats the row one compressor blades. This heating increases the fracture toughness of the material forming the rotor and compressor blades, thereby increasing the mechanical life cycle.

US Patent:

20130098062, Apr 25, 2013

Filed:

Oct 25, 2011

Appl. No.:

13/280474

Inventors:

ERIC E. DONAHOO - Chuluota FL, US
Christopher W. Ross - Oviedo FL, US

International Classification:

F02C 6/06
F01D 5/18
F02C 7/12

US Classification:

60785, 60806, 416 97 R

Abstract:

A compressor bleed cooling fluid feed system for a turbine engine for directing cooling fluids from a compressor to a turbine airfoil cooling system to supply cooling fluids to one or more airfoils of a rotor assembly is disclosed. The compressor bleed cooling fluid feed system may enable cooling fluids to be exhausted from a compressor exhaust plenum through a downstream compressor bleed collection chamber and into the turbine airfoil cooling system. As such, the suction created in the compressor exhaust plenum mitigates boundary layer growth along the inner surface while providing flow of cooling fluids to the turbine airfoils.

US Patent:

20130219853, Aug 29, 2013

Filed:

Feb 29, 2012

Appl. No.:

13/408287

Inventors:

David A. Little - Chuluota FL, US
Reinhard Schilp - Orlando FL, US
Christopher W. Ross - Oviedo FL, US

International Classification:

F02G 1/00

US Classification:

602001

Abstract:

A midframe portion () of a gas turbine engine () is presented and includes a compressor section with a last stage blade to orient an air flow () at a first angle (). The midframe portion () further includes a turbine section with a first stage blade to receive the air flow () oriented at a second angle (). The midframe portion () further includes a manifold () to directly couple the air flow () from the compressor section to a combustor head () upstream of the turbine section. The combustor head () introduces an offset angle in the air flow () from the first angle () to the second angle () to discharge the air flow () from the combustor head () at the second angle (). While introducing the offset angle, the combustor head () at least maintains or augments the first angle ().

US Patent:

58149120, Sep 29, 1998

Filed:

Mar 17, 1997

Appl. No.:

8/819432

Inventors:

Christopher Woodrow Ross - Goldenrod FL

International Classification:

H02K 1100

US Classification:

310 71

Abstract:

A main electrical lead of an electrical generator has an electrical conductor or main lead bushing which transmits electrical current produced by the generator to electrical loads external to the generator. The electrical conductor and the main electrical lead are electrically connected by a mechanical connector and a spring mechanism. The spring mechanism provides a force on the mechanical connector to maintain the conductor and the main lead in sufficient electrical contact so that they can transmit the requisite electrical current. A method of installing the spring mechanism is also provided and includes removing the electrical conductor from the main electrical lead and installing the spring mechanism under pressure betweeen the conductor and the main lead. The electrical conductor is then again mechanically connected to the main electrical lead.