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WO2017121550A1 - Piste de capteur et système - Google Patents

Piste de capteur et système Download PDF

Info

Publication number
WO2017121550A1
WO2017121550A1 PCT/EP2016/080264 EP2016080264W WO2017121550A1 WO 2017121550 A1 WO2017121550 A1 WO 2017121550A1 EP 2016080264 W EP2016080264 W EP 2016080264W WO 2017121550 A1 WO2017121550 A1 WO 2017121550A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor track
sen
sensor
shaft
steel
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.)
Ceased
Application number
PCT/EP2016/080264
Other languages
German (de)
English (en)
Inventor
Joachim Denk
Rainer Gausmann
Frank HEIDTMANN
Peter MARTINIUS
Mark Van Dijk
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
Siemens Corp
Original Assignee
Siemens AG
Siemens 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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of WO2017121550A1 publication Critical patent/WO2017121550A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/2006—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
    • G01D5/202—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils by movable a non-ferromagnetic conductive element
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/24428—Error prevention
    • G01D5/24433—Error prevention by mechanical means
    • G01D5/24438—Special design of the sensing element or scale

Definitions

  • the invention relates to a sensor track for eddy current applications wherein the sensor track is made of a steel having an austenitic crystal structure.
  • the invention relates to an arrangement with such a sensor track.
  • the preferred application of the invention are fast ro ⁇ animal turboengines.
  • the rotors of these systems rotate at speeds between about 600 - 30,000 rpm. In a particularly preferred field of application of the invention, these rotors are magnetically supported.
  • eddy current sensors are usually used in turbomachinery.
  • the radial and / or axial position of the rotor is determined relative to stationary components.
  • Advantages of the sensors are high accuracy with high resolution, high band width ⁇ in conjunction with a strong robustness against pollution in industrial applications.
  • a disadvantage of the sensors is the sensitivity of the eddy currents to material inhomogeneities, which lead to an electrical runout (electrical runout).
  • Manufacturers of high-speed rotary machines often have to comply with the API 617 (API Standard 617 - American Petroleum Institute), which is the sum of mechanical and electrical runout error to the greater of 25% of the maximum allowable vibration amplitude (peak-to-peak) and 6 ⁇
  • a steel is used as a sensor track, which has an austenitic crystal structure ⁇ , said steel having a high nickel content, in excess of 8Gew .-%.
  • An advantageous development provides for the sensor track to use a submarine steel.
  • Particularly suitable here is the material: 1.3964 (X2CrNiMnMoNNb21-16-5-3).
  • the skilled person is known as a generic characterized mangalloy that this differs from a simple stainless steel, that it is still alternates with manganese and molybdenum le ⁇ .
  • This alloy is made in such a way that it stabilizes the austenitic structure and avoids the formation of - or even ⁇ -ferrite.
  • the advantage for submarines is because ⁇ rin reason that they are not localized by distortion of an external magnetic field. It has been shown with the invention that this steel is also particularly well suited for the sensor track, in particular on turbo machines.
  • the sensor track can be realized in particular by:
  • the corresponding material is applied in the form of a welded layer on the shaft.
  • An advantageous development of the invention provides an arrangement with a rotor having a sensor track according to the invention, wherein the rotor comprises a shaft, wherein the base material of the shaft is a different material than the Ma ⁇ material of the sensor track, on the Base material of the shaft is attached.
  • the shaft material may in this case in particular be based on the strength requirements. chemical resistance, manufacturing requirements and costs, without having to consider the special requirements of the sensor track.
  • a particularly advantageous possibility for producing the sensor track is that the sensor track is welded onto the shaft.
  • the sensor track is formed as a sleeve which surrounds a shaft of the rotor extending in the circumferential direction.
  • a Anord ⁇ voltage comprises a bearing with magnetic bearings, which comprises a control and an output connected to the control eddy current sensor, wherein said eddy current sensor on the sensor track detects the radial and / or axial position of the rotor and the Rege Based on this measurement, the magnetic bearing is controlled or a magnetic field of the magnetic bearing is adjusted in such a way that the rotor further approaches the desired spatial position.
  • FIG. 1 shows an arrangement according to the invention with a sensor track SEN according to the invention.
  • FIG. 1 shows a magnetically levitated turbocompressor rotor or rotor R-extending along an axis X-by means of which a process fluid PF is compressed.
  • the rotor R is mounted on two axially spaced-apart positions of a shaft SH by means of a bearing BU (axially left only shown symbolically).
  • the sensor track SEN consists of a steel, the one
  • the bearing BU comprises an active magnetic bearing AMB, which extends in the circumferential direction to the axis X about the shaft SH of the rotor R he ⁇ .
  • An eddy-current sensor ECS detects the radial and / or axial position of the shaft SH in the region of the sensor track SEN.
  • the sensor track SEN can on the shaft SH as
  • the sensor track SEN is mounted as a sleeve SL on the shaft SH, surrounding the shaft in the circumferential direction.
  • the sleeve SL can be attached to the Wel ⁇ le SH, for example by means of shrinkage.
  • the sensor track SEN consists in both cases of a different material than the base material of the shaft SH. In the exemplary embodiment, the material Inconell 625 was selected for the sensor track SEN.
  • the sensor track can also be part of the shaft base material, such that the sensor track and the shaft consist of a steel which has an austenitic crystal structure.
  • FIG. 1 shows this possibility if both the sensor track SEN and the sleeve SL are not are provided separately but the eddy current sensor ECS simply measures against the shaft.
  • the shaft SH may have a surface treatment for this purpose.
  • the position POS measured by the eddy-current sensor ECS at the sensor track SEN of the shaft SH, is recorded by a control unit CU.
  • a power supply P supplies the control unit CU with the energy P. required for the operation of the storage BU.
  • a controller CR of the control unit CU determines from the position POS a controller output amplified by an amplifier AMP driven by the controller to the active magnetic bearing AMB of the position ⁇ BU is transmitted.
  • the electrical runout error of the measurement is reduced by means of the eddy current sensor ECS on the sensor ⁇ track SEN, so that the activation of the active Mag ⁇ netlagers AMB means of the control unit CU a more accurate axi ale and radial positioning of the rotor R result as the result previously in the art.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

La présente invention concerne une piste de capteur (SEN) pour des applications de courant parasite, ainsi qu'un système pourvu d'une telle piste de capteur. Selon l'invention, pour réduire le faux-rond de rotation, la piste de capteur (SEN) est constituée d'un acier qui présente une structure cristalline austénitique.
PCT/EP2016/080264 2016-01-13 2016-12-08 Piste de capteur et système Ceased WO2017121550A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016200311.9A DE102016200311A1 (de) 2016-01-13 2016-01-13 Sensorspur, Anordnung
DE102016200311.9 2016-01-13

Publications (1)

Publication Number Publication Date
WO2017121550A1 true WO2017121550A1 (fr) 2017-07-20

Family

ID=57614333

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/080264 Ceased WO2017121550A1 (fr) 2016-01-13 2016-12-08 Piste de capteur et système

Country Status (2)

Country Link
DE (1) DE102016200311A1 (fr)
WO (1) WO2017121550A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4121724A1 (de) * 1991-07-01 1993-01-07 Schaeffler Waelzlager Kg Verfahren zur herstellung eines impulsgebers
DE4431649A1 (de) * 1994-09-06 1995-08-17 Bosch Gmbh Robert Sensoranordnung zur Bestimmung der Drehzahl eines sich bewegenden Bauteils
US20090322316A1 (en) * 2008-06-30 2009-12-31 Eaton Corporation Hydraulic cylinder rod position sensing method
DE112013006754T5 (de) * 2013-03-01 2015-12-03 Mitsubishi Electric Corporation Aufzugkabinenposition-Erfassungsvorrichtung
DE102014217458A1 (de) 2014-09-02 2016-03-03 Schaeffler Technologies AG & Co. KG Encoder und Sensorvorrichtung für ein drehbares Maschinenteil

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19504307A1 (de) * 1995-02-09 1996-08-14 Siemens Ag Einrichtung zur Erfassung von Position und/oder Geschwindigkeit eines beweglichen Geräteteils
DE10303607A1 (de) * 2003-01-30 2004-08-19 Robert Bosch Gmbh Wirbelstromhubsensor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4121724A1 (de) * 1991-07-01 1993-01-07 Schaeffler Waelzlager Kg Verfahren zur herstellung eines impulsgebers
DE4431649A1 (de) * 1994-09-06 1995-08-17 Bosch Gmbh Robert Sensoranordnung zur Bestimmung der Drehzahl eines sich bewegenden Bauteils
US20090322316A1 (en) * 2008-06-30 2009-12-31 Eaton Corporation Hydraulic cylinder rod position sensing method
DE112013006754T5 (de) * 2013-03-01 2015-12-03 Mitsubishi Electric Corporation Aufzugkabinenposition-Erfassungsvorrichtung
DE102014217458A1 (de) 2014-09-02 2016-03-03 Schaeffler Technologies AG & Co. KG Encoder und Sensorvorrichtung für ein drehbares Maschinenteil

Also Published As

Publication number Publication date
DE102016200311A1 (de) 2017-07-27

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