Muhammad Saqib Riaz

US Patent:

8047796, Nov 1, 2011

Filed:

Nov 16, 2007

Appl. No.:

11/941751

Inventors:

Muhammad Riaz - Niskayuna NY, US
Dimitrios Stathopoulos - Delmar NY, US
Vyacheslav Filyaev - Bristol, GB

Assignee:

General Electric Company - Schenectady NY

International Classification:

F01D 5/30

US Classification:

416215, 416219 R, 416248

Abstract:

A method of assembling a steam turbine including a rotor assembly is provided. The method includes providing at least one turbine bucket including a dovetail that includes a plurality of crush surfaces, a plurality of non-contact surfaces, and at least one neck defined between one of the crush surfaces and one of the non-contact surfaces. The method also includes providing a turbine wheel that includes at least one dovetail slot defined therein that is defined by a plurality of crush surfaces and a plurality of non-contact surfaces, and coupling the dovetail of the at least one turbine bucket within the turbine wheel slot such that a slant angle of the at least one neck facilitates a substantially uniform distribution of load between the dovetail and the at least one slot.

US Patent:

8057187, Nov 15, 2011

Filed:

Sep 8, 2008

Appl. No.:

12/205938

Inventors:

Alan Richard DeMania - Niskayuna NY, US
Muhammad Saqib Riaz - Niskayuna NY, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

B64C 11/04
F04D 29/34
F03B 3/12

US Classification:

416212A, 416189

Abstract:

A steam turbine rotating blade for a low pressure section of a steam turbine engine is disclosed. The steam turbine rotating blade includes an airfoil portion. A root section is attached to one end of the airfoil portion. A dovetail section projects from the root section, wherein the dovetail section includes a skewed axial entry dovetail. A tip section is attached to the airfoil portion at an end opposite from the root section. A cover is integrally formed as part of the tip section. The cover comprises a first flat section, a second flat section, and a depression section located laterally between the first flat section and second flat section. The depression section is located below the first flat section at a first end where the first flat section and depression section are contiguous. The depression section rises above to the second flat section at a second end where the second flat section and depression section are contiguous. The second flat section is raised above the first flat section.

US Patent:

8075272, Dec 13, 2011

Filed:

Oct 14, 2008

Appl. No.:

12/205942

Inventors:

Muhammad Saqib Riaz - Niskayuna NY, US
Dimitrios Stathopoulos - Delmar NY, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

F01D 5/22
F01D 5/14

US Classification:

416191, 416223 R

Abstract:

A steam turbine rotating blade for a low pressure section of a steam turbine engine is disclosed. The steam turbine rotating blade includes an airfoil portion. A root section is attached to one end of the airfoil portion. A dovetail section projects from the root section, wherein the dovetail section includes a skewed axial entry dovetail. A tip section is attached to the airfoil portion at an end opposite from the root section. A cover is integrally formed as part of the tip section. A part span shroud is attached at an intermediate section of the airfoil portion between the ends thereof. The blade includes an exit annulus area of about 47. 7 ft(4. 43 m) or greater.

US Patent:

8096775, Jan 17, 2012

Filed:

Sep 8, 2008

Appl. No.:

12/205940

Inventors:

Muhammad Saqib Riaz - Niskayuna NY, US
Vyacheslav Filyayev - Bristol, GB

Assignee:

General Electric Company - Schenectady NY

International Classification:

B64C 11/04

US Classification:

416212R, 416219 R

Abstract:

A steam turbine rotating blade for a low pressure section of a steam turbine engine is disclosed. The steam turbine rotating blade includes an airfoil portion. A root section is attached to one end of the airfoil portion. A dovetail section projects from the root section, wherein the dovetail section includes a skewed axial entry dovetail. A tip section is attached to the airfoil portion at an end opposite from the root section. A cover is integrally formed as part of the tip section. The blade includes an exit annulus area of about 30. 5 ft(2. 83 m) greater.

US Patent:

8100657, Jan 24, 2012

Filed:

Sep 8, 2008

Appl. No.:

12/205941

Inventors:

Muhammad Saqib Riaz - Niskayuna NY, US
Qingxuan Michael Zhang - San Diego CA, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

B64C 11/04

US Classification:

416212A, 416223 R

Abstract:

A steam turbine rotating blade for a low pressure section of a steam turbine engine is disclosed. The steam turbine rotating blade includes an airfoil portion. A root section is attached to one end of the airfoil portion. A dovetail section projects from the root section, wherein the dovetail section includes a tangential entry dovetail. A tip section is attached to the airfoil portion at an end opposite from the root section. A cover is integrally formed as part of the tip section. The blade includes an exit annulus area of about 18. 1 ft(1. 68 m) or greater.

US Patent:

20090022601, Jan 22, 2009

Filed:

Jul 16, 2007

Appl. No.:

11/778180

Inventors:

Jonathon Slepski - Clifton Park NY, US
Muhammad Riaz - Schenectady NY, US

International Classification:

F01D 5/14

US Classification:

416241 R, 416223 A

Abstract:

A rotating blade for a steam turbine includes a root section and an airfoil section contiguous with the root section. The airfoil section is shaped to optimize aerodynamic performance while providing optimized flow distribution and minimal centrifugal and bending stresses. The blade also includes a tip section continuous with the airfoil section, and a cover formed as part of the tip section. The cover defines a radial seal that serves to minimize tip losses. The rotating blade is capable of running at operating speeds between 5626 and 11250 rotations per minute.