US3898013A - Shaft-turning device for steam turbines - Google Patents

Shaft-turning device for steam turbines Download PDF

Info

Publication number
US3898013A
US3898013A US390940A US39094073A US3898013A US 3898013 A US3898013 A US 3898013A US 390940 A US390940 A US 390940A US 39094073 A US39094073 A US 39094073A US 3898013 A US3898013 A US 3898013A
Authority
US
United States
Prior art keywords
rotor
shaft
rotor blades
rows
turning device
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
US390940A
Other languages
English (en)
Inventor
Wilhelm Engelke
Gerhard Purr
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.)
Kraftwerk Union AG
Original Assignee
Kraftwerk Union AG
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 Kraftwerk Union AG filed Critical Kraftwerk Union AG
Application granted granted Critical
Publication of US3898013A publication Critical patent/US3898013A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/34—Turning or inching gear

Definitions

  • 6O/704 415/198 oil turbine having a rotor mountable on the shaft of a [51] d 25/02 steam turbine, and stationary nozzle means for supply- Field l 178 20 ing driving medium to the rotor for revolving the 6458 657 b same.
  • the rotor having at the outer periphery thereof at least two rows of rotor blades disposed relative to [56] References Cited the stationary nozzle means so as to be engageable successively by the driving medium.
  • the present invention is not a turbine as such, but is a shaft-turning device for steam turbines, Le. a device which is used to continue turning the steam turbines slowly in order to prevent a distortion of the rotor and an uneven cooling after the turbine is shut off.
  • This turning device comprises, primarily, two rows of rotor blades separately mounted on the turbine shaft and an intermediately disposed row of rotor blades, whereby from a segment-shaped nozzle box, which is arranged in front of the first row of rotor blades, oil which is used as the driving medium, is supplied to the rows of rotor blades, which starts and/or respectively keeps, the tur bine shaft turning, depending on the force of the mass flows.
  • Such shaft-turning devices have become known heretofore from German Pat. Nos. 975,646 and 1,011,897 wherein there is described a rotor securely mounted on the shaft of the turbine and having rotor blades at the outer circumference thereof while, in axial direction forward of the rotor blades, nozzles for supplying the driving or propellant oil are disposed.
  • a shaft device of this type shafts of great weight can be accelerated from standstill and possibly turned or rotated for extended periods of time.
  • considerable mass flows or flow quantities i.e. large amounts of pressurized oil, are required in such a shaft turning device, in order to provide the necessary torque.
  • a shaftturning device for a steam turbine comprising an oil turbine including a rotor mountable on the shaft of a steam turbine, and stationary nozzle means for supplying driving medium to the rotor for revolving the same, the rotor having at the outer periphery thereof at least two rows of rotor blades disposed relative to the stationary nozzle means so as to be engageable successively by the driving medium, and guide vane means located between the rows of rotor blades. Due to this multistate construction, a substantial improvement in the efficiency of the shaft-turning device is provided, because a considerably smaller mass flow or flow quantity is required for the same torque. This means a substantial reduction in the size of the oil tank, the fullload oil pumps on the oil tank with the associated electric motors, smaller inner diameters for the oil lines and a reduction of the number of nozzles in the nozzle housing.
  • the shaft-turning device includes driving medium sup ply housing means carrying the nozzle means and having a part extending in axial direction of the rotor across the width of the rows of rotor blades, the guide vane means being secured to the part of the supply housing means.
  • FIG. I is an elevational view of the shaft-turning device
  • FIG. 2 is an enlarged partial cross sectional view of the rotor and the nozzle housing of FIG. I taken along the line Il-II in the direction of the arrows;
  • FIG. 3 is an elevational view of a nozzle housing with nozzle guide vanes as seen from behind the plane of the drawing of FIG. 1, and
  • FIG. 4 is a developed longitudinal sectional view of FIG. 3 taken along the line IVIV in the direction of the arrows, and including the rotor blades and guide vanes.
  • FIG. 1 there is shown in a side elevational view of the shaft-turning device of the invention, a rotor 2, which carries a row of rotor blades 3 at the outer periphery thereof, and is mounted on a turbine shaft 1.
  • Driving oil which drives the rotor, is supplied through two oppositely disposed nozzle housings 4 and 5, each of which extends over a peripheral angle of about 60 of the row of rotor blades and is proviced in this region with nozzle guide vanes (FIGS. 3 and 4).
  • the nozzle housings 4 and 5 are connected by feed lines to a non-illustrated oil tank, and to drive pumps.
  • the construction of the rotor 2 and the nozzle housing 4 is shown in greater detail.
  • the rotor 2 carries, at the outer periphery thereof, two rows of rotor blades 3 and 6, that are disposed in axially spaced relationship to each other.
  • the nozzle housing 4 has an inner supply duct 7 and corresponding nozzle outlets provided with guide vanes 8. Between the two rows of rotor blades 3 and 6, there is further disposed a row of guide vanes 9.
  • These guide vanes 9 are secured to a part 10 of the nozzle housing 4, which extends in axial direction of the rotor 2 over the width of the rows of rotor blades 3 and 6, the guide vanes 9 extending respectively only over the same peripheral distance as the nozzle outlets 8.
  • the other nozzle housing 5, not shown in the cross sectional view of FIG. 2, is constructed in the same manner as the nozzle housing 4.
  • FIG. 3 a side elevational view of the nozzle housing 5 is provided as seen from the rows of rotor blades.
  • the individual nozzle outlet vanes 8, which extend over the entire length of the nozzle outlet are particularly apparent in FIG. 3.
  • FIG. 4 shows a developed longitudinal sectional view of FIG. 3 taken along the line lV-IV which passes through the nozzle outlet duct or channel 7 and the coresponding following rows of vanes 3 and 6.
  • the oil is thus supplied through the duct 7 of the nozzle housing to the nozzle outlet with the guide vanes 8 and flow therefrom initially into the row of rotor blades 3.
  • the guide vanes 8 must be curved in opposite direction. so as to attain the same direction of flow onto the first row of rotor blades.
  • only one nozzle housing may serve to supply the oil, while the other may be closed.
  • Shaft-turning device for a steam turbine for continuing to turn the steam turbine slowly after the steam turbine is shut off, comprising an oil turbine including a rotor mountable on the shaft of a steam turbine, and stationary nozzle means for supplying driving medium to said rotor for revolving the same, said rotor having at the outer periphery thereof at least two rows of rotor blades disposed relative to said stationary nozzle means so as to be engageable successively by said driving medium, and guide vane means located between said rows of rotor blades, and nozzle means to supply pressurized oil to said rotor blades.
  • Shaft-turning device including oil driving medium supply housing means carrying said nozzle means and having a part extending in axial direction of said rotor across the width of said rows of rotor blades, said guide vane means being secured to said part of said supply housing means.
  • said supply housing means comprises a plurality of nozzle housings located at the periphery of said rotor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
US390940A 1972-08-25 1973-08-23 Shaft-turning device for steam turbines Expired - Lifetime US3898013A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2241788A DE2241788A1 (de) 1972-08-25 1972-08-25 Wellendrehvorrichtung fuer dampfturbinen

Publications (1)

Publication Number Publication Date
US3898013A true US3898013A (en) 1975-08-05

Family

ID=5854485

Family Applications (1)

Application Number Title Priority Date Filing Date
US390940A Expired - Lifetime US3898013A (en) 1972-08-25 1973-08-23 Shaft-turning device for steam turbines

Country Status (3)

Country Link
US (1) US3898013A (de)
CH (1) CH556970A (de)
DE (1) DE2241788A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5116200A (en) * 1990-06-28 1992-05-26 General Electric Company Apparatus and methods for minimizing vibrational stresses in axial flow turbines

Families Citing this family (1)

* 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

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US814423A (en) * 1905-08-24 1906-03-06 Giuseppe Belluzzo Elastic-fluid turbine.
US910266A (en) * 1906-12-17 1909-01-19 Giuseppe Belluzzo Elastic-fluid turbine.
US1634894A (en) * 1925-12-23 1927-07-05 Westinghouse Electric & Mfg Co Turbine-cooling means
US1678067A (en) * 1925-11-04 1928-07-24 Westinghouse Electric & Mfg Co Turbine-cooling means
US2232852A (en) * 1939-09-20 1941-02-25 Westinghouse Electric & Mfg Co Turbine apparatus
US2245175A (en) * 1939-10-19 1941-06-10 Gen Electric Elastic fluid turbine turning gear control system
US2303190A (en) * 1941-12-18 1942-11-24 Westinghouse Electric & Mfg Co Turbine apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US814423A (en) * 1905-08-24 1906-03-06 Giuseppe Belluzzo Elastic-fluid turbine.
US910266A (en) * 1906-12-17 1909-01-19 Giuseppe Belluzzo Elastic-fluid turbine.
US1678067A (en) * 1925-11-04 1928-07-24 Westinghouse Electric & Mfg Co Turbine-cooling means
US1634894A (en) * 1925-12-23 1927-07-05 Westinghouse Electric & Mfg Co Turbine-cooling means
US2232852A (en) * 1939-09-20 1941-02-25 Westinghouse Electric & Mfg Co Turbine apparatus
US2245175A (en) * 1939-10-19 1941-06-10 Gen Electric Elastic fluid turbine turning gear control system
US2303190A (en) * 1941-12-18 1942-11-24 Westinghouse Electric & Mfg Co Turbine apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5116200A (en) * 1990-06-28 1992-05-26 General Electric Company Apparatus and methods for minimizing vibrational stresses in axial flow turbines

Also Published As

Publication number Publication date
DE2241788A1 (de) 1974-03-07
CH556970A (de) 1974-12-13

Similar Documents

Publication Publication Date Title
US4674955A (en) Radial inboard preswirl system
US2640319A (en) Cooling of gas turbines
US3818695A (en) Gas turbine
US2505660A (en) Augmentor fob jet propulsion hav
US3832090A (en) Air cooling of turbine blades
US3826084A (en) Turbine coolant flow system
US3572960A (en) Reduction of sound in gas turbine engines
US3905191A (en) Gas turbine engine with efficient annular bleed manifold
US3240012A (en) Turbo-jet powerplant
GB1363261A (en) Gas turbine engines
US3033519A (en) Turbine nozzle vane construction
US3804335A (en) Vaneless supersonic nozzle
JPH08503758A (ja) 一体に鋳造された冷却用流体ノズルを備えたタービンベーンアッセンブリ
US3203180A (en) Turbo-jet powerplant
US2570155A (en) Flow apparatus
US2658700A (en) Turbocompressor power plant for aircraft
US3984193A (en) Radial-flow turbomachine
US3620021A (en) Gas turbine engines
US3898013A (en) Shaft-turning device for steam turbines
US3462953A (en) Gas turbine jet propulsion engine
US3756740A (en) Turbine stage
DE69734558T2 (de) Gasturbine und Rotorabdichtung um dem Rotor ein Kühlmedium zuzuführen
US2701682A (en) Rotojet impeller
US3101168A (en) Aerodynamic wave machine formed rotor blades to minimize thermal stress
EP0098363B1 (de) Gasturbine mit Kontrolle der Schaufeltemperatur