EP0169779A1 - Dispositif pour régler la pression de soutirage d'une turbine à condensation - Google Patents

Dispositif pour régler la pression de soutirage d'une turbine à condensation Download PDF

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Publication number
EP0169779A1
EP0169779A1 EP85401457A EP85401457A EP0169779A1 EP 0169779 A1 EP0169779 A1 EP 0169779A1 EP 85401457 A EP85401457 A EP 85401457A EP 85401457 A EP85401457 A EP 85401457A EP 0169779 A1 EP0169779 A1 EP 0169779A1
Authority
EP
European Patent Office
Prior art keywords
pressure
steam
annular
adjusting
turbine
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.)
Granted
Application number
EP85401457A
Other languages
German (de)
English (en)
Other versions
EP0169779B1 (fr
Inventor
Heinz Stetter
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.)
Alstom SA
Original Assignee
Alstom SA
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 Alstom SA filed Critical Alstom SA
Priority to AT85401457T priority Critical patent/ATE37587T1/de
Publication of EP0169779A1 publication Critical patent/EP0169779A1/fr
Application granted granted Critical
Publication of EP0169779B1 publication Critical patent/EP0169779B1/fr
Expired 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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
    • F01D17/162—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes for axial flow, i.e. the vanes turning around axes which are essentially perpendicular to the rotor centre line
    • 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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
    • F01D17/22—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical
    • F01D17/26—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical fluid, e.g. hydraulic
    • 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
    • F01D3/00—Machines or engines with axial-thrust balancing effected by working-fluid
    • F01D3/02—Machines or engines with axial-thrust balancing effected by working-fluid characterised by having one fluid flow in one axial direction and another fluid flow in the opposite direction

Definitions

  • the invention relates to a device for regulating the extraction pressure of a extraction condensation turbine, in which steam for heating or chemical process purposes is withdrawn from a stage of the blade duct of the medium-pressure part or the high-pressure part and in which the steam remaining in the turbine is a double-flow low-pressure part is supplied, with pivotable blades or blade parts from downstream of the steam extraction point (s) arranged guide grids, the blade pivoting movement via adjusting lever or arms by axial displacement of the adjusting lever or arm supporting adjusting rings.
  • the invention is therefore based on the object of simplifying the device of the type mentioned in such a way that it can predominantly be used as an internal control device;
  • a motor-driven axial displacement drive is to be used, the pressure fluid of which is compatible with the turbine working fluid.
  • a full-walled, axially immovable partition wall is provided between the two annular disc pistons and is in the radial gap between the radial inner ring housing wall and connected to the low pressure spaces behind the adjustable guide vanes
  • a labyrinth seal is arranged in the rotor shaft in the area between the bores connecting the suction chamber of each ring disk piston with the radial gap.
  • the adjusting device is largely arranged in the annular space 1 - that is, an already existing space - between the two first impeller stages 2a, 2b of a double-flow, low-pressure turbine symmetrical with respect to the turbine stages.
  • the low-pressure turbine is preferably part of a heating steam extraction turbine, the heating steam being drawn off at the outlet of the medium-pressure part 3 and the steam flow remaining in the turbine after removal being fed unthrottled to the annular space 1 via an overflow line from the medium-pressure outlet.
  • the adjusting device has a ring housing, which is arranged coaxially to the rotor shaft 4 and surrounds it at a distance (radial gap 5) and lies in the interior of the door frame, which comprises a radially outer casing 7, two annular disks 9 which are perpendicular to the longitudinal axis 8 of the rotor and a radially inner casing 10.
  • a ring housing which is arranged coaxially to the rotor shaft 4 and surrounds it at a distance (radial gap 5) and lies in the interior of the door frame, which comprises a radially outer casing 7, two annular disks 9 which are perpendicular to the longitudinal axis 8 of the rotor and a radially inner casing 10.
  • Arranged in the annular space 6 of the ring housing are two annular disk pistons 11, 12, which rest on one or more (preferably - for the purpose of achieving stable guidance of the annular disk pistons - several) coaxial guide rods 13 are axially displaceably mounted.
  • the washer pistons 11, 12 are provided on their radially outer and radially inner circumferential surfaces with sealing tips 14 which form labyrinth seals in the radial gaps between the washer pistons 11, 12 and the outer and inner circumferential surfaces of the washer pistons, with low leakage flows through the labyrinth seals for the maintenance of a Ensure pressure difference on the washer pistons 11, 12.
  • an adjusting ring 15 is firmly connected to the side facing the impeller 2.
  • Adjusting levers 16 are supported on the adjusting rings 15; the other ends of the adjusting levers 16 are connected in a rotationally rigid manner to the radially inner ends of each of a radially directed axis 17.
  • the axes 17 pass through the associated guide vane in the longitudinal direction thereof and are non-rotatably connected to the guide vane or a part thereof and are supported and guided rotatably with their radially outer ends in a recess 19 in the inflow housing 20 or a guide vane carrier.
  • the rotation of the guide vanes 18 or guide vane parts takes place by an axial displacement of the annular disc pistons 11, 12, which, as is known per se, results in a pivoting movement of the adjusting levers 16 and, consequently, in a rotary movement of the guide vanes 18 or their pivotable parts
  • different constructive solutions of the mechanical adjustment rods 15, 16, 17 are also possible.
  • the axial adjustment of the annular disc pistons 11, 12 is carried out by the steam's own steam of sufficiently high pressure, which via a control pressure line 21 and bores 22 in the outer jacket, or corresponding lines, into the two pressure chambers 23a, 23b at the end facing the corresponding adjusting ring 15 and the adjusting levers 16 the washer piston 11, 12 is passed.
  • the space (suction space) between the inner annular disc piston end faces is connected via one or more bores 24 or recesses in the inner jacket to the radial gap 5, and thus - as a result of the axial gap 29 - to the spaces of low pressure behind the guide vanes 18.
  • the axial displacement of the annular disc pistons 11, 12 has to be carried out against the sum of the axial steam power components of the adjustable guide vanes 18.
  • the pressure in the pressure chambers 23a, 23b must be set in order to keep the total axial force from the axial vapor force components in balance. Since the axial force components on the guide vanes 18 always act in the opening direction, the direction of the compressive force on each annular disk piston 11, 12 is always the same.
  • a control valve 25 is provided in the control pressure line 21 outside the turbine housing, which is preferably operatively connected to a turbine tap for regenerative feed water preheating: higher pressure.
  • the control of the control valve 25 is carried out according to the known control of the (external) throttle valve in the overflow line, so that there is no need to go into this detail.
  • Each guide vane 18 does not need to be pivoted.
  • Each guide vane 18 can consist of a fixed front part 18a, the axis of rotation 17 and an adjustable (pivotable) part 18b (FIG. 3).
  • the fixed parts 18b carry the adjusting device and connect them to the inlet housing part of the low pressure turbine.
  • the adjustable parts 18b serve to regulate the steam extraction pressure by changing the flow cross section of the two first guide grids 18.
  • the axis 17 can, see FIG. 1, be an integral part of the adjustable part 18b; but it can also - see FIG. 3 - be pushed through corresponding recesses in the parts 18a, 18b and connected to the adjustable part 18b via a known wedge connection 26, in which a torque can be transmitted by frictional engagement and positive engagement.
  • the axial displacement of the washer pistons can be limited by stops.
  • compression springs can be connected between the annular disk pistons 11, 12, which is not shown in further detail.
  • the device described above can be expanded with simple measures such that two extraction pressures can be regulated for heating or process purposes (FIG. 2).
  • the adjusting device that can be used for this differs from the adjusting device according to FIG. 1 (only) in that a full-walled, axially immovable partition wall 27 is provided between the annular disc pistons 11, 12, that each pressure chamber 23a or 23b has a control pressure line 21 'and one each Control valve 25 'is connected to the associated control steam source such that each suction chamber has a bore 24' with the radial gap 5 is connected, and that in the radial gap 5 between the bores 24 t a shaft seal (labyrinth seal) is provided with sealing tips 28 preferably attached to the inner jacket 10.
  • a shaft seal (labyrinth seal) is provided with sealing tips 28 preferably attached to the inner jacket 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Turbines (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Fats And Perfumes (AREA)
  • Non-Reversible Transmitting Devices (AREA)
  • Door And Window Frames Mounted To Openings (AREA)
EP85401457A 1984-07-26 1985-07-16 Dispositif pour régler la pression de soutirage d'une turbine à condensation Expired EP0169779B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85401457T ATE37587T1 (de) 1984-07-26 1985-07-16 Einrichtung zur regelung des entnahmedrucks einer entnahme-kondensationsturbine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3427528A DE3427528C1 (de) 1984-07-26 1984-07-26 Einrichtung zur Regelung des Entnahmedrucks einer Entnahme-Kondensationsturbine
DE3427528 1984-07-26

Publications (2)

Publication Number Publication Date
EP0169779A1 true EP0169779A1 (fr) 1986-01-29
EP0169779B1 EP0169779B1 (fr) 1988-09-28

Family

ID=6241603

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85401457A Expired EP0169779B1 (fr) 1984-07-26 1985-07-16 Dispositif pour régler la pression de soutirage d'une turbine à condensation

Country Status (10)

Country Link
US (1) US4634340A (fr)
EP (1) EP0169779B1 (fr)
JP (1) JPS6140405A (fr)
AT (1) ATE37587T1 (fr)
CS (1) CS274606B2 (fr)
DE (2) DE3427528C1 (fr)
DK (1) DK155449C (fr)
FI (1) FI79384C (fr)
YU (1) YU122285A (fr)
ZA (1) ZA855647B (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4995786A (en) * 1989-09-28 1991-02-26 United Technologies Corporation Dual variable camber compressor stator vane
FR2681640B1 (fr) * 1991-09-25 1993-11-19 Snecma Turbomachine a aubes de stator a calage variable.
US5249918A (en) * 1991-12-31 1993-10-05 General Electric Company Apparatus and methods for minimizing or eliminating solid particle erosion in double-flow steam turbines
JP2739313B1 (ja) * 1997-06-23 1998-04-15 株式会社ミナミ 草止めブロック及びブロックの草止め構造
WO2006060000A1 (fr) 2004-12-01 2006-06-08 United Technologies Corporation Ensemble aubes de guidage d'admission de soufflante variable, turbomachine dotee d'un tel ensemble et procede de commande correspondant
US7322789B2 (en) * 2005-11-07 2008-01-29 General Electric Company Methods and apparatus for channeling steam flow to turbines
US8317458B2 (en) * 2008-02-28 2012-11-27 General Electric Company Apparatus and method for double flow turbine tub region cooling
US8096748B2 (en) * 2008-05-15 2012-01-17 General Electric Company Apparatus and method for double flow turbine first stage cooling

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2412365A (en) * 1943-10-26 1946-12-10 Wright Aeronautical Corp Variable turbine nozzle
GB737472A (en) * 1952-10-03 1955-09-28 Napier & Son Ltd Turbines and like machines having adjustable guide blades
US3392958A (en) * 1966-06-03 1968-07-16 Rover Co Ltd Adjustable nozzle guide vane assembly for an axial flow turbine
DE2513581A1 (de) * 1975-03-06 1976-09-09 Bbc Brown Boveri & Cie Turbinenregelung eines heizkraftwerkes
US4387562A (en) * 1980-08-08 1983-06-14 Nippon Steel Corporation System for generating power with top pressure of blast furnaces

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2380237A (en) * 1943-07-29 1945-07-10 Gen Electric Elastic fluid turbine
US2948460A (en) * 1956-08-20 1960-08-09 Ladimir R Zeman Fluid actuated motion translating device
US4053256A (en) * 1975-09-29 1977-10-11 United Technologies Corporation Variable camber vane for a gas turbine engine
US4220008A (en) * 1978-12-28 1980-09-02 Cummins Engine Company Exhaust brake modulating control system
CH642717A5 (de) * 1979-07-12 1984-04-30 Bbc Brown Boveri & Cie Einrichtung zur regelbaren dampfabzapfung an einer entnahmeturbine.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2412365A (en) * 1943-10-26 1946-12-10 Wright Aeronautical Corp Variable turbine nozzle
GB737472A (en) * 1952-10-03 1955-09-28 Napier & Son Ltd Turbines and like machines having adjustable guide blades
US3392958A (en) * 1966-06-03 1968-07-16 Rover Co Ltd Adjustable nozzle guide vane assembly for an axial flow turbine
DE2513581A1 (de) * 1975-03-06 1976-09-09 Bbc Brown Boveri & Cie Turbinenregelung eines heizkraftwerkes
US4387562A (en) * 1980-08-08 1983-06-14 Nippon Steel Corporation System for generating power with top pressure of blast furnaces

Also Published As

Publication number Publication date
ATE37587T1 (de) 1988-10-15
FI852880A0 (fi) 1985-07-24
CS274606B2 (en) 1991-09-15
FI79384B (fi) 1989-08-31
DE3565297D1 (en) 1988-11-03
DE3427528C1 (de) 1985-08-22
FI79384C (fi) 1989-12-11
JPS6140405A (ja) 1986-02-26
ZA855647B (en) 1986-03-26
FI852880L (fi) 1986-01-27
DK155449C (da) 1989-10-23
EP0169779B1 (fr) 1988-09-28
JPH0557402B2 (fr) 1993-08-24
DK339485D0 (da) 1985-07-25
US4634340A (en) 1987-01-06
DK339485A (da) 1986-01-27
DK155449B (da) 1989-04-10
YU122285A (en) 1988-10-31
CS546285A2 (en) 1990-10-12

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