Cuong V Dinh

US Patent:

52861694, Feb 15, 1994

Filed:

Dec 15, 1992

Appl. No.:

7/991545

Inventors:

Cuong V. Dinh - Schenectady NY
Stephen G. Ruggles - Scotia NY
Chic S. Yang - Schenectady NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

F01D 514

US Classification:

416223A

Abstract:

A last-stage steam turbine bucket having an actual and theoretical profile according to Charts II-XVI. The last-stage turbine bucket has a theoretical profile according to Charts I-XVII.

US Patent:

46436456, Feb 17, 1987

Filed:

Jul 30, 1984

Appl. No.:

6/635859

Inventors:

Kenneth E. Robbins - Saratoga NY
Stephen G. Ruggles - Scotia NY
Dan Duncan - Schenectady NY
John C. Williams - Schenectady NY
Stephen K. Tung - Clifton Park NY
William J. Sumner - Mechanicville NY
Cuong V. Dinh - Schenectady NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

F01D 522

US Classification:

416190

Abstract:

A stage of an axial flow turbine includes a plurality of spaced apart buckets and a plurality of spaced apart nozzle partitions, each plurality respectively circumferentially aligned about and axially spaced from each other along a rotor of the turbine. The nozzle partitions are circumferentially spaced such that a minimum throat extends a predetermined radial distance from the root, thereby forming a converging-diverging flow passageway between nozzle partitions. The trailing edge of the nozzle partitions are disposed to include axial and tangential lean with respect to the rotor. Buckets include a plurality of covers respectively connecting the tips and having a single outward radially extending sealing rib on the radially outer surface of each cover, wherein each rib is tangentially aligned with respective adjacent ribs. Buckets are overtwisted to compensate for untwist at operational speed to achieve optimum efficiency. Buckets are circumferentially spaced to provide a converging-diverging channel therebetween and include lashing for providing mechanical coupling at operational speed.

US Patent:

52999157, Apr 5, 1994

Filed:

Jul 15, 1992

Appl. No.:

7/913352

Inventors:

Cuong V. Dinh - Schenectady NY
Steven G. Ruggles - Scotia NY

Assignee:

General Electric Corporation - Schenectady NY

International Classification:

F01D 514

US Classification:

416223A

Abstract:

A last-stage steam turbine bucket having a profile according to Charts I-XXXXI of Table I. The bucket is divided into a number of profile sections each of which is a predetermined radial distance from the root section. Each point on a profile section at the predetermined radial distance from the root is defined by an X-Y coordinate and a radius R along the arc of a circle connecting adjacent points.

US Patent:

53932005, Feb 28, 1995

Filed:

Apr 4, 1994

Appl. No.:

8/222786

Inventors:

Cuong V. Dinh - Schenectady NY
Stephen G. Ruggles - Scotia NY
James H. Vogan - Schenectady NY

Assignee:

General Electric Co. - Schenectady NY

International Classification:

F01D 512
F01D 522

US Classification:

416223A

Abstract:

A last-stage steam turbine bucket having a profile according to the charts set forth in the specification.

US Patent:

52678342, Dec 7, 1993

Filed:

Dec 30, 1992

Appl. No.:

7/996926

Inventors:

Cuong V. Dinh - Schenectady NY
Stephen G. Ruggles - Scotia NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

F01D 512
F01D 522

US Classification:

416223A

Abstract:

A last-stage steam turbine bucket having a profile according to Charts II-XIII, XV-XXVII and XXIX of Table I.

US Patent:

61427373, Nov 7, 2000

Filed:

Aug 26, 1998

Appl. No.:

9/140020

Inventors:

Robert Ellis Seeley - Broadalbin NY
Cuong Van Dinh - Schenectady NY
Eloy Vincent Emeterio - Amsterdam NY

Assignee:

General Electric Co. - Schenectady NY

International Classification:

F01D 532

US Classification:

416222

Abstract:

A dovetail joint between a rotor wheel and a bucket includes a male dovetail component on the rotor wheel and a female dovetail component in the bucket. The male dovetail component has axially projecting hooks with slanted crush surfaces along generally radially inwardly directed surfaces. The slanted surfaces form included angles with neck portions parallel to a plane normal to the axis of rotation which are larger than 90. degree. and decrease in included angle from the radially outermost hooks to the radially innermost hook where the angle is 90. degree. Compound fillets are also provided along the transition surfaces between the slanted crush surfaces and the neck surfaces. Thus, stress concentrations are minimized.