Anthony N Schiavo

US Patent:

7488157, Feb 10, 2009

Filed:

Jul 27, 2006

Appl. No.:

11/494177

Inventors:

Bonnie D. Marini - Oviedo FL, US
Anthony L. Schiavo - Oviedo FL, US

Assignee:

Siemens Energy, Inc. - Orlando FL

International Classification:

F01D 5/14

US Classification:

416193A, 416224

Abstract:

Aspects of the invention are related to a turbine vane assembly in which at least one of the platforms is equipped with one or more removable platform inserts. The inserts can be used in those areas of the platform where failures or damage has been known to occur, among other locations. If an insert becomes damaged or is destroyed during engine operation, the insert can be easily replaced, and the platform frames and the airfoil can be reused. As a result, the overall life of the vane can be extended. Further, the inserts can be made of materials that can reduce cooling requirements compared to known turbine vanes, thereby allowing cooling air to be used for other uses in the engine.

US Patent:

7534086, May 19, 2009

Filed:

May 5, 2006

Appl. No.:

11/418863

Inventors:

Stefan Mazzola - Sanford FL, US
Douglas A. Keller - Oviedo FL, US
Anthony L. Schiavo - Oviedo FL, US
David C. Radonovich - Winter Park FL, US

Assignee:

Siemens Energy, Inc. - Orlando FL

International Classification:

F01D 11/08

US Classification:

4151731

Abstract:

Aspects of the invention are directed to a multi-layer ring seal segment that can incorporate a plurality of material systems. The ring seal segment can include an inner layer, a central layer and an outer layer. The inner layer can be attached to one side of the central layer, and the outer layer can be attached to an opposite side of the central layer. The inner and outer layers can be made of a ceramic matrix composite, such as a hybrid oxide ceramic matrix composite or an oxide-oxide ceramic matrix composite. The central layer can be made of a material that has high shear strength relative to the inner and outer layers. The ring seal segment according to aspects of the invention can take advantage of the benefits of the different materials so as to better withstand the operational loads of the turbine.

US Patent:

7581924, Sep 1, 2009

Filed:

Jul 27, 2006

Appl. No.:

11/494178

Inventors:

Bonnie D. Marini - Oviedo FL, US
Anthony L. Schiavo - Oviedo FL, US

Assignee:

Siemens Energy, Inc. - Orlando FL

International Classification:

F01D 9/02

US Classification:

415191, 416193 A

Abstract:

Aspects of the invention relate to a turbine vane in which the inner and outer platforms are located substantially entirely on either the pressure side or the suction side of the airfoil. When a plurality of such vanes are installed in the turbine, a seam is formed by the circumferential end of the inner and outer platforms and a portion of the airfoil of a neighboring vane. During engine operation, a high pressure coolant is supplied to at least one of the platforms. The coolant can leak through the seam. Because the seam is located proximate the airfoil, the coolant leakage through the seam can be productively used to cool the transition region between the vane platforms and the airfoil. In addition to such cooling benefits, aspects of the invention can result in a potential increase in engine efficiency as well as component life.

US Patent:

7686577, Mar 30, 2010

Filed:

Nov 2, 2006

Appl. No.:

11/591907

Inventors:

Jay A. Morrison - Oviedo FL, US
David C. Radonovich - Winter Park FL, US
Anthony L. Schiavo - Oviedo FL, US
Gary B. Merrill - Orlando FL, US
Malberto F. Gonzalez - Orlando FL, US

Assignee:

Siemens Energy, Inc. - Orlando FL

International Classification:

F01D 25/26

US Classification:

415139, 4151731, 4151733, 4151734

Abstract:

A ceramic ring segment for a turbine engine that may be used as a replacement for one or more metal components. The ceramic ring segment may be formed from a plurality of ceramic plates, such as ceramic matrix composite plates, that are joined together using a strengthening mechanism to reinforce the ceramic plates while permitting the resulting ceramic article to be used as a replacement for components for turbine systems that are typically metal, thereby taking advantage of the properties provided by ceramic materials. The strengthening mechanism may include a ceramic matrix composite overwrap or plurality of overwraps designed to help prevent delamination of the ceramic plates when the ceramic article is in use by placing the plates in compression.

US Patent:

7722317, May 25, 2010

Filed:

Jan 25, 2007

Appl. No.:

11/698232

Inventors:

Anthony L. Schiavo - Oviedo FL, US
Douglas A. Keller - Oviedo FL, US
Malberto F. Gonzalez - Orlando FL, US
David C. Radonovich - Winter Park FL, US

Assignee:

Siemens Energy, Inc. - Orlando FL

International Classification:

F01D 25/26

US Classification:

415138, 415134, 4151731, 266285, 432239

Abstract:

A CMC wall (F) may be attached to a metal wall (F) by a plurality of bolts (A, B, C) passing through respective holes (A, B, C) in the CMC wall (F) and holes in the metal wall (F), clamping the walls (F, F) together with a force that allows sliding thermal expansion but does not allow vibrational shifting. Distal ones of the holes (A, B) in the CMC wall (F) or in the metal wall (F) are elongated toward a central one of the bolts (C) or at alternate angles to guide differential thermal expansion (T) of the CMC wall (F) versus the metal wall (F) between desired cold and hot geometries. A second CMC wall (R) may be mounted similarly to a second metal wall (R) by pins (A, B, C) that allow expansion of the CMC component () in a direction normal to the walls (F, R).

US Patent:

7753643, Jul 13, 2010

Filed:

Sep 22, 2006

Appl. No.:

11/526256

Inventors:

Malberto F. Gonzalez - Orlando FL, US
David C. Radonovich - Winter Park FL, US
Anthony L. Schiavo - Oviedo FL, US
Jay A. Morrison - Oviedo FL, US
Steven J. Vance - Orlando FL, US

Assignee:

Siemens Energy, Inc. - Orlando FL

International Classification:

F01D 11/08

US Classification:

415 1, 4151734, 4151744

Abstract:

A ceramic ring segment for a turbine engine that may be used as a replacement for one or more metal components. The ceramic ring segment may be formed from a plurality of ceramic plates, such as ceramic matrix composite plates, that are joined together using a strengthening mechanism to reinforce the ceramic plates while permitting the resulting ceramic article to be used as a replacement for components for turbine systems that are typically metal, thereby taking advantage of the properties provided by ceramic materials. The strengthening mechanism may include a bolt or a plurality of bolts designed to prevent delamination of the ceramic plates when in use by keeping the ceramic plates in compression.

US Patent:

7950234, May 31, 2011

Filed:

Oct 13, 2006

Appl. No.:

11/581165

Inventors:

David Charles Radonovich - Winter Park FL, US
Douglas Allen Keller - Oviedo FL, US
Jay Alan Morrison - Oviedo FL, US
Malberto Fernandez Gonzalez - Orlando FL, US
Anthony L. Schiavo - Oviedo FL, US

Assignee:

Siemens Energy, Inc. - Orlando FL

International Classification:

F02C 1/00
F02G 3/00

US Classification:

60753, 4151731, 415177, 415178, 415200, 4151734

Abstract:

Aspects of the invention are directed to a ring seal segment having a base portion and a frame portion. The base portion and the frame portion are a unitary structure. The frame portion is made of four unitary side walls: a forward wall, an aft wall and a pair of transverse side walls. The side walls can be arranged in a rectangular configuration. At least a part of the base portion can be coated with a thermal insulating material. A ring seal segment according to aspects of the invention is well suited to withstand the expected operational loads in the turbine section. The transverse side walls can provide bending strength to the base and can strengthen the forward and aft side walls. Transition regions between the side walls and the base portion are strengthened by three perpendicular planes that cooperate to provide structural strength to the ring seal segment.

US Patent:

8096758, Jan 17, 2012

Filed:

Sep 3, 2008

Appl. No.:

12/203397

Inventors:

Anthony L. Schiavo - Oviedo FL, US

Assignee:

Siemens Energy, Inc. - Orlando FL

International Classification:

F01D 1/02
F01D 9/00
F03B 1/04
F03B 3/16
F03D 1/04
F03D 11/00
F03D 3/04
F04D 29/44
F04D 29/54

US Classification:

415200, 4152093

Abstract:

Protective insert plates () installed on a working gas face () of a turbine vane platform () provide replaceable portions of a turbine shroud for improved maintenance. The plates act as tiles, and may be formed of ceramic materials for thermal protection. Two cages () in the vane platform slidably receive the two insert plates () from opposite circumferential sides () of the platform. The plates slide into the cages up to the pressure and suction sides () of the vane airfoil (). The plates may have proximal edges () shaped to fit the respective pressure and suction sides of the vane airfoil. A retainer plate may be attached to a flange () on the cooled face () of each platform, and may contact each insert plate with a locking device () to prevent sliding of the plate in the cage.