Ge Global Research 2008 - 2014
Senior Principal Engineer
Ge Power Dec 1989 - May 1995
Engineer
Education:
Rensselaer Polytechnic Institute 1990 - 1993
Masters, Master of Engineering, Engineering, Mechanical Engineering
Worcester Polytechnic Institute 1985 - 1989
Bachelors, Bachelor of Science, Mechanical Engineering
Ponaganset High School 1981 - 1985
Skills:
76 Us Patents Author/Co Author of 26 Technical Papers/Reports Ge Technical Leadership Development Course Mechanical Engineering Engineering Gas Turbines Testing Power Generation Turbines Turbomachinery Steam Turbines Sealing
Us Patents
Seal Arrangement For A Rotary Machine Such As A Turbine
Norman Arnold Turnquist - Carlisle NY Osman Saim Dinc - Troy NY George Ernest Reluzco - Schenectady NY Robert Harold Cromer - Johnstown NY Martin Francis OConnor - Niskayuna NY David Robert Skinner - Pattersonville NY Christopher Edward Wolfe - Niskayuna NY
Assignee:
General Electric Company - Schenectady NY
International Classification:
F16J 1544
US Classification:
277355, 277416
Abstract:
A seal arrangement for a rotary machine, such as a turbine, includes a main seal segment such as a labyrinth seal segment, a brush seal segment disposed in a slot in the main seal segment and having a layer of bristles secured between upstream and downstream plates of the brush seal segment, and at least one passage radially formed through the main seal segment to communicate a balancing pressure from a pressure source located exteriorly of an outer periphery of the main seal segment to a cavity defined in the downstream plate of the brush seal segment at a downstream side of the layer of bristles of the brush seal segment.
Bucket Tip Brush Seals In Steam Turbines And Methods Of Installation
Christopher Edward Wolfe - Niskayuna NY Norman Arnold Turnquist - Sloansville NY Frederick George Baily - Ballston Spa NY David Robert Skinner - Pattersonville NY
Assignee:
General Electric Company - Schenectady NY
International Classification:
F01D 1108
US Classification:
4151733, 4151735, 4151745, 298883
Abstract:
A diaphragm has an annular groove formed of deep and shallow grooves with the deep groove opening into the shallow groove. A combination spill strip/brush seal is disposed in the groove. The brush seal comprises a pair of flexible bars secured to the proximal ends of the brush bristles by welding and is received in the shallow groove and a recess in an axial face of the spill strip. The spill strip has base portions extending into the deep groove. The combination spill strip/brush seal is secured in the annular groove by peening material of the diaphragm into the spill strip/brush seal combination. The brush seal may be used with different diameters of spill strips and diaphragm grooves.
Combined Brush Seal And Labyrinth Seal Segment For Rotary Machines
David Robert Skinner - Pattersonville NY Bharat S. Bagepalli - Schenectady NY Robert Harold Cromer - Johnstown NY Osman Saim Dinc - Istanbul, TR Norman Arnold Turnquist - Cobleskill NY Christopher Edward Wolfe - Niskayuna NY
Assignee:
General Electric Company - Schenectady NY
International Classification:
F16J 15447
US Classification:
277303, 277305, 277350, 277355, 277412
Abstract:
A brush seal is comprised of arcuate seal segments having ends cut in a radial direction with bristles âcantedâ at an approximate 45Â angle relative to radii of the segments, leaving triangular regions adjacent one end of each segment devoid of bristles at the segment interfaces. The brush seals are retrofit into conventional labyrinth seals with the backing plate for the bristles comprising a labyrinth tooth profile extending fully 360Â about the seal, including those areas where bristles are not present. The sealing capacity is not substantially degraded, while affording significant sealing improvements over conventional labyrinth seals. Additionally, when retrofit into labyrinth seals with radial movement, the individual labyrinth seal segments are free to move radially independently of one another during transients.
The adjoining edges of bucket covers are sealed one to the other. A brush seal projecting from a stationary shroud overlies the bucket covers. A joint at which the adjacent covers sealingly engage each other precludes radial outflow of high pressure fluid into bristles of the brush seal, preventing radial and axial deflection of the bristles and consequent failure of the bristles. The joints between the covers may comprise lap or tongue-and-groove joints.
Wei-Ming Chi - Sunnyvale CA Norman Arnold Turnquist - Carlisle NY Christopher Edward Wolfe - Niskayuna NY Mark Arne Florin - Ballston Spa NY Mahmut Faruk Aksit - Troy NY
Assignee:
General Electric Company - Schenectady NY
International Classification:
F16J 1508
US Classification:
277409, 277500, 277602, 277603, 415134
Abstract:
A low leakage sealing system is provided between a steam pipe and a housing comprised of a pair of shells and a nozzle box movable relative to one another. The sealing system includes large and small diameter sealing rings engaging the pipe and shells or nozzle box and a secondary sealing element disposed between the sealing rings and one of the pipe and shells or nozzle box. The sealing elements comprise frustoconical elements having curved end surfaces forming primary seals with the sealing rings and the housing. In another form, the sealing system includes annular carrier elements having radially opening cavities for receiving sealing rings engageable with the pipe and housing, respectively. The carrier elements are axially spaced from a plurality of sealing rings to provide the low leakage sealing system.
Brush Seal Segment End Bristle Protection And Flexibility Maintenance Device And Methods Of Forming The Segment
Norman Arnold Turnquist - Sloansville NY Frederick George Baily - Ballston Spa NY Christopher Edward Wolfe - Niskayuna NY
Assignee:
General Electric Company - Schenectady NY
International Classification:
F16J 1544
US Classification:
277355, 277416
Abstract:
A brush seal segment includes a plurality of bristles disposed between a pair of backing plates. The bristles are welded to one another adjacent their proximal ends and to the edges of the backing plates remote from the bristle tips. An end plate is welded to the end faces of the backing plates at each of the opposite ends of the segment. Each end plate terminates at approximately one-half the length of the bristles along the end face to prevent the bristles from bending circumferentially and axially during handling while maintaining substantially uniform flexibility of the bristles throughout the entire length of the segment.
Actuating Seal Carrier For A Turbine And Method Of Retrofitting
Norman Arnold Turnquist - Sloansville NY Mehmet Demiroglu - Troy NY
Assignee:
General Electric Company - Niskayuna NY
International Classification:
F01D 1102
US Classification:
277355, 277416, 277544, 277546
Abstract:
A seal assembly is provided for a rotary machine wherein the rotary machine comprises a rotor and a casing. The rotor comprises a generally longitudinally-extending axis wherein the casing is generally coaxially aligned with the axis. The casing circumferentially surrounds and is radially spaced apart from the rotor wherein the casing comprises an inner circumferential channel generally coaxially aligned with the rotor. The seal assembly comprises a plurality of seal segments disposable in a circumferential array in the channel so as to be movable between radially inward and radially outward positions. In addition, the seal assembly comprises a plurality of displacement apparatuses comprising at least one fluid inlet and configured for urging apart the seal segments upon introduction of a fluid medium in the fluid inlet. Each of the seal segments comprises an end having at least one of the displacement apparatuses circumferentially disposed thereon.
Method And Apparatus For Eliminating Thermal Bowing And Axial Thrust Loads Of Steam Turbine Rotors
Mark Edward Burnett - Buskirk NY Norman Arnold Turnquist - Sloansville NY Christopher Edward Wolfe - Niskayuna NY Bruce William Brisson - Galway NY Fredrick George Baily - Ballston Spa NY David Alan Caruso - Ballston Lake NY
Assignee:
General Electric Company - Schenectady NY
International Classification:
F01D 1100
US Classification:
4151737, 415230
Abstract:
In a steam turbine, a combined brush and labyrinth seal is provided between a diaphragm web and axial projecting platforms on bucket dovetails at a location spaced radially outwardly of the outer diameter of the rotor. The downstream axially adjacent bucket dovetails also have platforms serving as complementary sealing surfaces to labyrinth teeth formed on the web. By locating the combined labyrinth and brush seal radially outwardly of the outer diameter of the shaft, thermal bowing of the rotor is eliminated. By providing backup labyrinth seals at the same radial location, axial thrust loads are eliminated in the event of brush seal failure.
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