US3836281A - Nozzle structure for steam turbines - Google Patents

Nozzle structure for steam turbines Download PDF

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Publication number
US3836281A
US3836281A US00337620A US33762073A US3836281A US 3836281 A US3836281 A US 3836281A US 00337620 A US00337620 A US 00337620A US 33762073 A US33762073 A US 33762073A US 3836281 A US3836281 A US 3836281A
Authority
US
United States
Prior art keywords
plates
nozzle
opening
blades
spacers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00337620A
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English (en)
Inventor
C Czuszak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carrier Corp
Elliott Turbomachinery Co Inc
Original Assignee
Carrier Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carrier Corp filed Critical Carrier Corp
Priority to US00337620A priority Critical patent/US3836281A/en
Priority to GB562374A priority patent/GB1418257A/en
Priority to CA192,647A priority patent/CA1003757A/en
Priority to NL7402373A priority patent/NL7402373A/xx
Priority to CH275074A priority patent/CH562393A5/xx
Priority to JP2374574A priority patent/JPS5417082B2/ja
Priority to FR7406831A priority patent/FR2220008B1/fr
Priority to BR1461/74A priority patent/BR7401461D0/pt
Priority to AR252558A priority patent/AR197934A1/es
Application granted granted Critical
Publication of US3836281A publication Critical patent/US3836281A/en
Assigned to ELLIOTT TURBOMACHINERY CO., INC. reassignment ELLIOTT TURBOMACHINERY CO., INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CARRIER CORPORATION, A CORP OF DEL.
Assigned to FIRST NATIONAL BANK OF CHICAGO, THE reassignment FIRST NATIONAL BANK OF CHICAGO, THE LICENSE (SEE DOCUMENT FOR DETAILS). Assignors: ELLIOT TURBOMACHINERY CO., INC.
Assigned to CONTINENTAL BANK N.A. reassignment CONTINENTAL BANK N.A. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ELLIOTT TURBOMACHINERY CO., INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • F01D9/047—Nozzle boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
    • F01D1/02—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines
    • F01D1/10—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines having two or more stages subjected to working-fluid flow without essential intermediate pressure change, i.e. with velocity stages

Definitions

  • the nozzle structure of this invention includes a pair of nozzle blade supporting plates arranged in overlying relation.
  • the plates are formed with an arcuate opening arranged in registration with a similar shaped passage in the wall of the steam chamber.
  • the plates are formed with a recess in opposite side surfaces of the opening therein.
  • Nozzle blades are positioned in the opening and have end portions extending into the re cess.
  • Spacers are also mounted in. the recess between the end portions of the blades and are shaped to space the blades apart at the desired angle. The end portions of the blades and the spacers are clamped between plates and the plates are clamped against the wall of the steam chamber.
  • SHEET 2 BF 2 NOZZLE STRUCTURE FOR STEAM TURBlINlES BACKGROUND OF THE INVENTION In one conventional form of a steam turbine nozzle structure, a one-piece member is machined to provide the steam passages.
  • the nozzle structure is made up of nozzle blocks, rings and the like which are welded together to form an integral whole. The blocks are machined to provide passages extending at the desired angle for directing the steam to the blades or buckets on the turbine rotor.
  • These structures are expensive to produce and usually cannot be modified; but if so, such modification is obtained by remachining the steam passages which usually involves an expense that makes the re-machining impractical.
  • This invention has as an object a turbine nozzle structure particularly economical to manufacture in which the steam passages can be conveniently and quickly modified at normal cost.
  • the invention is also particularly advantageous in turbines requiring a large nozzle area due to the fact the turbine is operated with low steam pressure and high horsepower output is required.
  • a pair of nozzle blade supporting plates are detachably secured to the wall of the steam chest or chamber, one plate overlying the other.
  • the plates are formed with an opening in registration with the steam passage in the steam chest wall.
  • the plates are formed to provide a recess in the opposite side surfaces of the opening.
  • the recesses are enlarged transversely in the area inwardly of the side surfaces of the opening.
  • a series of nozzle blades are arranged in the opening and have end portions extending into the recess. The blades are spaced apart and maintained at the desired angle by spacers disposed in the recesses intermediate the end portions of the blades. The blade ends and spacers are clamped between the plates and the plates to the steam chest wall by screw members.
  • FIG. 1 is a vertical sectional view of a steam turbine embodying my invention
  • FIG. 2 is a view taken on line 2-2, FIG. 1, with certain of the nozzle blades omitted;
  • FIG. 3 is an enlarged sectional view taken on line 33, FIG. 2, in the area thereof in which the nozzle blades are omitted;
  • FIG. 4 is an enlarged sectional view taken on line 44, FIG. 2, a portion of the nozzle blades being broken away to show the adjacent spacers in elevation;
  • FIG. 5 is a view taken on line 55, FIG. 4, with portions of the nozzle blades, spacers and supporting plates broken away showing the nozzle blade end portions and the spacers in section;
  • FIG. 6 is an isometric view of the nozzle blade
  • FIG. 7 is an isometric representation of a spacer.
  • FIG. 1 there is shown a conventional form of turbine having upper and lower casing structures 10, 11 in which there is journaled the shaft 12 in bearing structures 13.
  • Rotor discs 15, 17 are fixed to the shaft 12 and provided at their peripheries with a circular series of rotor blades or buckets 18, 19.
  • the casing is split horizontally on the axis of the shaft 12 providing the upper and lower casing sections 10, 11.
  • the lower section 11 is formed with a steam chest or chamber 20 having a wall portion 21 formed with a passage 23.
  • the nozzle ring structure 24 is mounted on the inner surface 25 of the wall 21 by screws 26, 27.
  • the nozzle structure consists of a pair of nozzle blade supporting plates 30, 31, illustrated as of semiannular form.
  • the plates 30, 31 are each formed with an arcuate opening 33. With the plates .30, 31 bolted to the steam chamber wall 21, the arcuate openings 33 in the plates form a common arcuate opening arranged in registration with the steam passage 23.
  • the plates 30, 31 are formed with recesses 34 at opposite side surfaces of the opening 33.
  • the inner portions of the recesses 34 are enlarged in a direction transversely of the opening 33, as at 40, 41, see FIG. 3.
  • the inner enlargements 40, 41 form the recesses, T shaped in general configuration.
  • a series of nozzle blades 43 are arranged in the arcuate opening 33 in the plates 30,31.
  • the blades 43 are formed with end portions 45 shaped complemental to the recesses in the plates 30,31.
  • the spacers 50 are also of a configuration comparable to the recesses at the opposite sides of the opening 33.
  • the spacers 50 and the blade ends 45 are dimensioned such that when the blades and the spacers are assembled between the plates 30,31 and the plates secured to the wall 21 of the steam chest by the screws 26,27, the spacers and the ends of the blade are clamped tightly between the plates 30,31.
  • FIG. 5 the spacers 50 at the ends of the Figure are shown in elevation in accordance with the section line 5-5, FIG. 4.
  • the center portion of FIG. 5 is broken to the area of the enlargements 40,41, with the spacers 50 and blade ends 45 shown in section.
  • the configuration of the spacers 50 determines the spacing between the blades 43 and the angularity thereof in relation to the axis of the shaft 12.
  • the recesses in the opposite side surfaces of the opening 33 are provided by simply forming grooves in the confronting sides of the plates 30,31.
  • the nozzle blades 43 may be economically produced by being produced from rolled stock.
  • the spacers 50 may be produced in like manner or fomied from powdered metal. Only the plates 30,31 need to be machined.
  • a nozzle structure for a steam turbine having a steam chamber with a wall formed with an arcuate passage communicating with the turbine cylinder, said nozzle structure comprising a pair of (inner and outer) nozzle blade supporting plates, one of said plates engaging said wall and the other plate overlying said first plate, said plates being formed with an arcuate opening arranged in registration with said passage, said plates being formed to provide a recess in the opposite side surfaces of said arcuate opening, a series of nozzle blades disposed in said opening, said blades extending across said opening and having end portions extending into said recesses, blade spacers mounted in said recesbeing arranged in registration with the grooves in said other plate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
US00337620A 1973-03-02 1973-03-02 Nozzle structure for steam turbines Expired - Lifetime US3836281A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US00337620A US3836281A (en) 1973-03-02 1973-03-02 Nozzle structure for steam turbines
GB562374A GB1418257A (en) 1973-03-02 1974-02-07 Nozzle structure for steam turbines
CA192,647A CA1003757A (en) 1973-03-02 1974-02-15 Nozzle structure for steam turbines
NL7402373A NL7402373A (zh) 1973-03-02 1974-02-21
CH275074A CH562393A5 (zh) 1973-03-02 1974-02-27
FR7406831A FR2220008B1 (zh) 1973-03-02 1974-02-28
JP2374574A JPS5417082B2 (zh) 1973-03-02 1974-02-28
BR1461/74A BR7401461D0 (pt) 1973-03-02 1974-02-28 Estrutura de tubeira para uma turbina a vapor
AR252558A AR197934A1 (es) 1973-03-02 1974-02-28 Estructura de tobera para turbinas de vapor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00337620A US3836281A (en) 1973-03-02 1973-03-02 Nozzle structure for steam turbines

Publications (1)

Publication Number Publication Date
US3836281A true US3836281A (en) 1974-09-17

Family

ID=23321278

Family Applications (1)

Application Number Title Priority Date Filing Date
US00337620A Expired - Lifetime US3836281A (en) 1973-03-02 1973-03-02 Nozzle structure for steam turbines

Country Status (9)

Country Link
US (1) US3836281A (zh)
JP (1) JPS5417082B2 (zh)
AR (1) AR197934A1 (zh)
BR (1) BR7401461D0 (zh)
CA (1) CA1003757A (zh)
CH (1) CH562393A5 (zh)
FR (1) FR2220008B1 (zh)
GB (1) GB1418257A (zh)
NL (1) NL7402373A (zh)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6626641B1 (en) * 2000-10-24 2003-09-30 Alfred Conhagen, Inc. Nozzle for turbine
US20070020093A1 (en) * 2005-07-20 2007-01-25 United Technologies Corporation Lightweight cast inner diameter vane shroud for variable stator vanes
US20070189893A1 (en) * 2006-02-15 2007-08-16 General Electric Company Methods and apparatus for nozzle carrier with trapped shim adjustment
US20090285673A1 (en) * 2005-07-20 2009-11-19 United Technologies Corporation Inner diameter vane shroud system having enclosed synchronizing mechanism
US9605540B2 (en) 2013-08-20 2017-03-28 Honeywell International Inc. Alternating nozzles for radial inflow turbine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5926843U (ja) * 1982-08-12 1984-02-20 アルプス電気株式会社 スイツチのケ−ス結合構造
EP2194230A1 (de) * 2008-12-05 2010-06-09 Siemens Aktiengesellschaft Leitschaufelanordnung für eine Axialturbomaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190909475A (en) * 1909-04-21 1909-09-16 James Howden Improvements in Turbine Nozzles.
US1298564A (en) * 1918-06-12 1919-03-25 Gen Electric Elastic-fluid turbine.
DE461307C (de) * 1925-08-07 1928-06-16 Siemens Schuckertwerke Akt Ges Zwischenboden fuer Dampfturbinen
DE936900C (de) * 1954-07-16 1955-12-22 Siemens Ag Anordnung zur Befestigung von keramischen Leitschaufeln
US3758229A (en) * 1971-11-19 1973-09-11 Gen Electric Turbine valve chest and nozzle plate construction

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB133862A (zh) * 1900-01-01
JPH033802U (zh) * 1989-06-02 1991-01-16

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190909475A (en) * 1909-04-21 1909-09-16 James Howden Improvements in Turbine Nozzles.
US1298564A (en) * 1918-06-12 1919-03-25 Gen Electric Elastic-fluid turbine.
DE461307C (de) * 1925-08-07 1928-06-16 Siemens Schuckertwerke Akt Ges Zwischenboden fuer Dampfturbinen
DE936900C (de) * 1954-07-16 1955-12-22 Siemens Ag Anordnung zur Befestigung von keramischen Leitschaufeln
US3758229A (en) * 1971-11-19 1973-09-11 Gen Electric Turbine valve chest and nozzle plate construction

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6626641B1 (en) * 2000-10-24 2003-09-30 Alfred Conhagen, Inc. Nozzle for turbine
US20070020093A1 (en) * 2005-07-20 2007-01-25 United Technologies Corporation Lightweight cast inner diameter vane shroud for variable stator vanes
US20090285673A1 (en) * 2005-07-20 2009-11-19 United Technologies Corporation Inner diameter vane shroud system having enclosed synchronizing mechanism
US7753647B2 (en) * 2005-07-20 2010-07-13 United Technologies Corporation Lightweight cast inner diameter vane shroud for variable stator vanes
US7901178B2 (en) 2005-07-20 2011-03-08 United Technologies Corporation Inner diameter vane shroud system having enclosed synchronizing mechanism
US20070189893A1 (en) * 2006-02-15 2007-08-16 General Electric Company Methods and apparatus for nozzle carrier with trapped shim adjustment
US7419355B2 (en) 2006-02-15 2008-09-02 General Electric Company Methods and apparatus for nozzle carrier with trapped shim adjustment
US9605540B2 (en) 2013-08-20 2017-03-28 Honeywell International Inc. Alternating nozzles for radial inflow turbine

Also Published As

Publication number Publication date
FR2220008B1 (zh) 1978-12-29
BR7401461D0 (pt) 1974-11-19
FR2220008A1 (zh) 1974-09-27
CA1003757A (en) 1977-01-18
NL7402373A (zh) 1974-09-04
GB1418257A (en) 1975-12-17
AR197934A1 (es) 1974-05-15
JPS49135005A (zh) 1974-12-26
JPS5417082B2 (zh) 1979-06-27
CH562393A5 (zh) 1975-05-30

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ELLIOTT TURBOMACHINERY CO., INC., A CORP OF DELAWA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. SUBJECT TO LICENSE RECITED.;ASSIGNOR:CARRIER CORPORATION, A CORP OF DEL.;REEL/FRAME:004499/0922

Effective date: 19851220

AS Assignment

Owner name: FIRST NATIONAL BANK OF CHICAGO, THE, ONE FIRST NAT

Free format text: LICENSE;ASSIGNOR:ELLIOT TURBOMACHINERY CO., INC.;REEL/FRAME:004940/0562

Effective date: 19871109

Owner name: FIRST NATIONAL BANK OF CHICAGO, THE,ILLINOIS

Free format text: LICENSE;ASSIGNOR:ELLIOT TURBOMACHINERY CO., INC.;REEL/FRAME:004940/0562

Effective date: 19871109

AS Assignment

Owner name: CONTINENTAL BANK N.A.

Free format text: SECURITY INTEREST;ASSIGNOR:ELLIOTT TURBOMACHINERY CO., INC.;REEL/FRAME:005258/0092

Effective date: 19891212