(12) United States Patent ao) Patent No.: us 6,196,793 Bi
Braaten (45) Date of Patent: Mar. 6,2001
(54) NOZZLE BOX
(75) Inventor: Mark Edward Braaten, Clifton Park, NY (US)
(73) Assignee: General Electric Company,
Schenectady, NY (US)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 09/227,866
(22) Filed: Jan. 11, 1999
(51) Int. CI.7 F01D 9/00
(52) U.S. CI 415/191; 415/202; 415/208.2;
(58) Field of Search 415/202, 191,
415/208.2, 209.1, 209.3, 193
(56) References Cited
U.S. PATENT DOCUMENTS
3,804,335 * 4/1974 Sohre 239/289
5,259,727 * 11/1993 Quinn 415/190
5,392,513 2/1995 Mazzola 29/889.1
5,927,943 * 7/1999 Maier 415/167
FOREIGN PATENT DOCUMENTS
61-053403 * 3/1986 (IP) .
Apparatus and method for directing a flow of fluid to a turbine via a nozzle box mountable to encircle a shaft. The nozzle box includes a housing having an inner wall spaced from an outer wall and joined therewith so as to form a chamber therein. The housing also includes at least one inlet and at least one outlet in which each is in fluid flow communication with the chamber. A plurality of radially projecting nozzles are positioned between the inner and outer walls and located upstream of the outlet for directing the flow of fluid through the outlet. A flow distributor is positioned between the inner and outer walls and located upstream of the nozzles for directing the flow of fluid through the chamber and to the nozzles. The flow distributor is configured to obtain a substantially uniform flow of fluid to the nozzles.
13 Claims, 12 Drawing Sheets