EP1505262A1 - Procédé et appareil pour mesurer la largeur d'une fente radiale - Google Patents

Procédé et appareil pour mesurer la largeur d'une fente radiale Download PDF

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Publication number
EP1505262A1
EP1505262A1 EP03018166A EP03018166A EP1505262A1 EP 1505262 A1 EP1505262 A1 EP 1505262A1 EP 03018166 A EP03018166 A EP 03018166A EP 03018166 A EP03018166 A EP 03018166A EP 1505262 A1 EP1505262 A1 EP 1505262A1
Authority
EP
European Patent Office
Prior art keywords
flow
radial gap
pressure
width
measuring unit
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.)
Withdrawn
Application number
EP03018166A
Other languages
German (de)
English (en)
Inventor
Matthias Beutin
Jan Dehnen
Christof Fischer
Matthias Dr. Oechsner
Wolfgang Stammen
Frank Woditschka
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to EP03018166A priority Critical patent/EP1505262A1/fr
Publication of EP1505262A1 publication Critical patent/EP1505262A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/164—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of an axial flow wheel
    • 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
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/04—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to undesired position of rotor relative to stator or to breaking-off of a part of the rotor, e.g. indicating such position

Definitions

  • the invention relates to a method and a device for Determining a width of a radial gap between a a rotation axis rotatably mounted component and a stationary component, wherein a leakage flow along forms a loss flow direction in the radial gap.
  • a contact or a grinding of the blade tip with the Inner housing must be prevented during operation.
  • the contact or the grinding could lead to a heat development and finally the destruction of the turbomachine to lead.
  • the blade tips wear out until The grinding is finished, with a hard contact often too an enlarged blade play leads.
  • Methods for measuring the width of the radial gap are, for example with the help of X-rays, electric sparks as well as the measurement of electrical capacitance and inductance possible. Most of these methods are costly and difficult to handle at high temperatures.
  • a permanent small width of the radial gap would be achievable when the radial extent of a stator as an embodiment a stationary component and a rotor as Embodiment of a rotatably mounted component by the Construction could be controlled precisely.
  • a simultaneous and identical expansion of stator and rotor in both transients as well as stable would be ideal, but in real turbomachinery is hardly the case, because usually the rotor is more massive due to the strength requirement as the stator.
  • the thermal expansions of rotor and stator are in their time course, especially when starting and stopping the machine, different.
  • a method and apparatus for measuring blade clearance of thermal turbomachinery is in the document DE 195 01 811 A1 shown. This is the radial blade clearance between a blade tip and a blade carrier through an abradable measuring needle leading to the blade tip protrudes, measures and monitors.
  • An optical measurement method is z. B. in DE 693 09 046 T2 to see. Here, a method and an apparatus for Monitoring a column presented.
  • Object of the present invention is to provide a simple and reliable method for measuring the width of a radial gap and a device for carrying out such Specify method.
  • the task directed towards the device is by the Claims 6 and 7 solved.
  • FIG. 1 is a section of a part of a turbomachine 1 shown.
  • the turbomachine 1 can, for example a compressor, a steam turbine or a gas turbine be.
  • a gas turbine for the sake of clarity, below in detail an embodiment of the invention with respect to a Gas turbine shown.
  • a rotatably mounted about a rotation axis 2 rotor 3 is designed such that a rotatably mounted member 4 attached can be.
  • the rotatably mounted component 4 can for example, be a blade.
  • a blade For the sake of clarity is below by a blade as Embodiment of a rotatably mounted component 4 spoken.
  • a stationary component 5 is mounted such that a radial play 6 between the blade 4 and the stationary Component 5 is created.
  • a flow medium flows substantially along the axis of rotation 2 past the blade 4.
  • the flow medium flows along a flow direction 7
  • Flow of the flow medium includes a lost flow, which forms along a loss flow direction 8.
  • the leakage flow forms along the radial gap 6 out. This leakage flow should be minimized.
  • An im Radial gap 6 located radial gap pressure measuring unit 9th is attached so that a pressure of the flow medium can be measured.
  • Flow pressure measuring unit attached, with which a flow pressure is measured.
  • the flow pressure measuring unit as a loss flow direction 8 in front of the radial gap 6 arranged flow pressure measuring unit 10 for Determining a loss flow direction 8 in front of the radial gap 6 acting flow pressure formed.
  • the flow pressure measuring unit as an in loss flow direction 8 to the radial gap 6 arranged downstream pressure measuring unit 11 for Determining a loss flow direction 8 after the radial gap 6 acting Strömungstik pressure formed.
  • the Radialspalttik alone and Radialspalt réelleabbau is This is described in a first approximation by the Bernoulli equation. Based on the pressure difference, the difference the radial gap pressure and the flow pressure form is, the width of the radial gap 6 is determined.
  • the determination the width of the radial gap 6 all three flow pressure measuring units (Radial gap pressure measuring unit 9, flow pressure measuring unit 10 and downstream pressure measuring unit 11) used. About the building up pressure difference between the radial gap pressure measuring unit 9, the second Flow-pressure measuring unit 10 and the downstream pressure measuring unit 11 also becomes the width of the radial gap 6 determined.
  • Radial gap pressure measurement unit 9 provides a radial gap pressure output signal.
  • the flow-form pressure measuring unit 10 provides a flow pre-pressure output signal and the flow post-pressure measuring unit 11 provides a flow post-pressure output.
  • the radial gap pressure measuring unit 9 can also be designed as a pressure sensor.
  • the flow-pressure measuring unit 10 and the downstream pressure measuring unit 11 can also be designed as pressure sensors.
  • the radial gap pressure output signal, the flow pre-pressure output signal and the downstream pressure output forwarded to an evaluation unit 12.
  • the evaluation unit 12 the radial gap pressure output, the Flow pre-pressure output signal and the flow post-pressure output signal processed and from this the width of the radial gap 6 determined.
  • the evaluation unit (12) has a memory, the reference curves contains a relationship between the determined Flow pressures and radial gap pressures and the Play the gap width.
  • this device is a determination of the width of Radial gap 6 during operation at high temperatures possible. This allows this method and this device as part of a device for optimizing the radial gap be used.
  • the method and the device can be used in the transient operation of a gas turbine.
  • the method and the device can also be used in the stable operation can be used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Arrangements Characterized By The Use Of Fluids (AREA)
EP03018166A 2003-08-08 2003-08-08 Procédé et appareil pour mesurer la largeur d'une fente radiale Withdrawn EP1505262A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03018166A EP1505262A1 (fr) 2003-08-08 2003-08-08 Procédé et appareil pour mesurer la largeur d'une fente radiale

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03018166A EP1505262A1 (fr) 2003-08-08 2003-08-08 Procédé et appareil pour mesurer la largeur d'une fente radiale

Publications (1)

Publication Number Publication Date
EP1505262A1 true EP1505262A1 (fr) 2005-02-09

Family

ID=33547673

Family Applications (1)

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EP03018166A Withdrawn EP1505262A1 (fr) 2003-08-08 2003-08-08 Procédé et appareil pour mesurer la largeur d'une fente radiale

Country Status (1)

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EP (1) EP1505262A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103696981A (zh) * 2013-12-25 2014-04-02 绍兴协亨机械设备有限公司 一种汽车的喷泵装置
CN114719809A (zh) * 2021-01-05 2022-07-08 通用电气公司 使用压力测量进行实时间隙评估的方法和装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2684568A (en) * 1950-02-04 1954-07-27 Senger Ulrich Apparatus for ascertaining and regulating deformation of the housing and rotor elements of an elastic fluid turbomachine
CH318021A (de) * 1953-11-12 1956-12-15 Siemens Ag Messeinrichtung zur Überwachung des radialen Schaufelspiels von Kreiselmaschinen, insbesondere Dampfturbinen
US3754433A (en) * 1971-09-17 1973-08-28 Bendix Corp Fluidic proximity sensor
US4159636A (en) * 1977-04-16 1979-07-03 Prvni Brnenska Strojirna, Narodni Podnik Method for continuously monitoring the clearances in rotating equipment by flow means
GB2063374A (en) * 1979-11-14 1981-06-03 Plessey Co Ltd Turbine Rotor Blade Tip Clearance Control

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2684568A (en) * 1950-02-04 1954-07-27 Senger Ulrich Apparatus for ascertaining and regulating deformation of the housing and rotor elements of an elastic fluid turbomachine
CH318021A (de) * 1953-11-12 1956-12-15 Siemens Ag Messeinrichtung zur Überwachung des radialen Schaufelspiels von Kreiselmaschinen, insbesondere Dampfturbinen
US3754433A (en) * 1971-09-17 1973-08-28 Bendix Corp Fluidic proximity sensor
US4159636A (en) * 1977-04-16 1979-07-03 Prvni Brnenska Strojirna, Narodni Podnik Method for continuously monitoring the clearances in rotating equipment by flow means
GB2063374A (en) * 1979-11-14 1981-06-03 Plessey Co Ltd Turbine Rotor Blade Tip Clearance Control

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103696981A (zh) * 2013-12-25 2014-04-02 绍兴协亨机械设备有限公司 一种汽车的喷泵装置
CN114719809A (zh) * 2021-01-05 2022-07-08 通用电气公司 使用压力测量进行实时间隙评估的方法和装置

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