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WO2009003782A2 - Element which generates a magnetic field - Google Patents

Element which generates a magnetic field Download PDF

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Publication number
WO2009003782A2
WO2009003782A2 PCT/EP2008/056885 EP2008056885W WO2009003782A2 WO 2009003782 A2 WO2009003782 A2 WO 2009003782A2 EP 2008056885 W EP2008056885 W EP 2008056885W WO 2009003782 A2 WO2009003782 A2 WO 2009003782A2
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic field
field generating
generating element
compressor wheel
base body
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/EP2008/056885
Other languages
German (de)
French (fr)
Other versions
WO2009003782A3 (en
Inventor
Johannes Ante
Stephan Heinrich
Andreas Ott
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive GmbH
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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of WO2009003782A2 publication Critical patent/WO2009003782A2/en
Publication of WO2009003782A3 publication Critical patent/WO2009003782A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
    • F02C6/04—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output
    • F02C6/10—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant
    • F02C6/12—Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
    • 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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/025—Fixing blade carrying members on shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/02—Gas passages between engine outlet and pump drive, e.g. reservoirs
    • F02B37/025—Multiple scrolls or multiple gas passages guiding the gas to the pump drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/04—Units comprising pumps and their driving means the pump being fluid-driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/266—Rotors specially for elastic fluids mounting compressor rotors on shafts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/50—Intrinsic material properties or characteristics
    • F05D2300/507—Magnetic properties
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a magnetic field generating element for fastening a compressor wheel on a turboshaft of an exhaust gas turbocharger, with a Grundkorper receiving an annular, rotating with a turbo shaft magnet.
  • the power generated by an internal combustion engine depends on the air mass and the amount of fuel that can be supplied to the internal combustion ⁇ machine. To increase the power, it is necessary to supply the internal combustion engine more combustion air and fuel. This increase in performance is achieved in a naturally aspirated engine by increasing the displacement or by increasing the speed. An increase in displacement leads but basically to heavier, larger in size and thus more expensive internal combustion engines. The increase in the speed brings especial problems and disadvantages with larger internal combustion engines.
  • An exhaust gas turbocharger consists essentially of a compressor and a turbine, which are connected to a common shaft and rotate at the same speed.
  • the turbine converts the normally useless deflagrating energy of the exhaust gas into rotation ⁇ energy and drives the compressor.
  • the compressor also referred to in this context as a compressor, draws in fresh air and demands the pre-compressed air to the individual cylinders of the engine.
  • the larger amount of air in the cylinders can be fed an increased amount of fuel, whereby the internal combustion engine gives more power.
  • the combustion process is also favorably affected. flows, so that the internal combustion engine achieves a better overall efficiency.
  • the Torque ⁇ ment running a supercharged with a turbocharger internal combustion engine can be made extremely favorable.
  • German patent application with the registration file 10 2004 052 695.8 discloses an exhaust gas turbocharger with a sensor at the compressor end of the turbo shaft for direct measurement of the speed of the turbo shaft.
  • the sensor is guided here through the compressor housing and directed to an element for varying a magnetic field.
  • the element for varying the magnetic field is designed as a permanent magnet ⁇ which is angeord ⁇ net in a fastener.
  • the fastening element has an enclosure, in which the magnet is mounted, wherein it rests directly on the Kom ⁇ pressorrad. If the fastening element is pressed against the compressor wheel with the desired tightening torque, forces arise which must be absorbed by the permanent magnet. The brittle material of the magnet can be damaged.
  • the object of the present invention is therefore to provide a magnetic field generating element for fastening a compressor wheel ⁇ on a turboshaft of an exhaust gas turbocharger, in which the magnet is protected against mechanical and chemical loads.
  • the magnetic field generating element is at least in three parts, of a Mantelkorper, the Grundkorper and the annular magnet is formed, wherein the Grundkorper from the magnetic good conducting, high-strength metal be ⁇ on which the annular magnet is mounted and the Mantelkorper from a non-magnetic material, and is welded to the Grundkorper so that the Man ⁇ telkorper and the body for the magnet form an enclosure, high tightening torques can be transmitted to the magnetic field generating element, so that the compressor can be securely attached to the turbo shaft.
  • the tightening ⁇ torque is transmitted from the Mantelkorper directly on the base body and the magnet is not mechanically stressed.
  • the high-strength base body forms a good Verbin ⁇ dung to the turboshaft and forwards the Mag- generated by the magnetic netfeld to the sensor.
  • the mantle body together with the basic body forms a hermetically gastight enclosure. In this way, the penetration of chemically reactive gases is prevented into the enclosure and the magnet is ge ⁇ protects permanently against corrosion.
  • the inventive at least three-part Ausbil- fertil of the magnetic field generating element makes it possible so ⁇ probably their mechanical and their magnetic properties optimally.
  • a thread for screwing the magnetic field generating element is formed with a thread on the turbo shaft in the Grundkorper.
  • the base made of high-strength metal can take up particularly fine threads, whereby the compressor wheel can be screwed with a large force against the turbo shaft.
  • 17-4PH steel also known as 1.4542 or 1.4548 steel
  • This steel manages the manet field very well and is easy to weld.
  • the Festig ⁇ ness of this steel is extremely high.
  • the annular magnet contains Selte ⁇ neerden metals.
  • Rare earth magnets such as NdFeB or SmCo magnets produce a relatively high magnetic
  • the jacket body is made of VA steel (for example, 1.4301 steel). This steel can be welded well with the material of the basic body, wherein the jacket ⁇ body can be geometrically designed with little effort, so that it can serve to accommodate a turning tool.
  • VA steel for example, 1.4301 steel
  • FIG. 1 shows an exhaust gas turbocharger with a turbine and a compressor
  • FIG. 3 a magnetic field generating element according to the prior art
  • FIG. 4 shows a magnetic field generating element according to the invention.
  • FIG. 1 shows an exhaust gas turbocharger 1 with a turbine 2 and a compressor 3.
  • the compressor wheel 9 is rotatably mounted and connected to the turbo shaft 5.
  • the turbo shaft 5 is rotatably mounted and connected at its other end to the turbine wheel 4.
  • the combination of compressor wheel 9, turbo shaft 5 and turbine wheel 4 is also referred to as a running tool.
  • Hot exhaust gas is introduced from an unillustrated here Verbrennungskraftma ⁇ machine into the turbine 2 via the turbine inlet 7, wherein the turbine wheel is set in rotation. 4
  • the exhaust gas flow leaves the turbine 2 through the turbine outlet 8.
  • the turbine shaft 4 is connected to the compressor wheel 9 via the turbo shaft 5.
  • the turbine 2 drives the compressor 3.
  • air is sucked through the air inlet 16, which is then compressed in Kom ⁇ pressor 3 and fed via the air outlet 6 of the internal combustion ⁇ combustion engine.
  • Figure 2 shows the compressor 3 in a sectional view.
  • the compressor wheel 9 In the compressor housing the compressor wheel 9 can be seen.
  • the compressor wheel 9 is mounted on the turbo shaft 5 with the magnetic ⁇ field generating element 17.
  • the magnetic field erzeu ⁇ constricting element 17 is therefore located in the air inlet 16 of the compressor 3.
  • the magnetic field generating member 17 can be formed, for example, as a cap nut, which is screwed to an applied on the turboshaft 5 threaded to the compressor wheel 9 of against a collar Turbowelle 5 with this firm to brace.
  • the magnetic field generating element 17 for fastening the compressor wheel 9 to the turbo shaft 5 be ⁇ is an annular permanent magnet 13.
  • the magnet 13 rotates during rotation of the turbo shaft 5 with this about the axis of rotation of the turbo shaft 5. In this case, the magnet 13 generates a Change in the magnetic field strength or the magnetic field gradient in the sensor 15. This change in the
  • Magnetic field or field gradient generated in the sensor 15 an electronically processable signal which is proportional to the speed of the turbo shaft 5.
  • FIG. 3 shows a magnetic field generating member 17 for fixing a Kompres ⁇ sorrades 9 to a turboshaft 5 according to the prior art.
  • the basic body 11 has a casing 10 into which the permanent magnet 13 is fitted.
  • the enclosure 10 is closed with a protective cap 14.
  • the closure of the enclosure 10 with the protective cap 14 can be done by the application of welds 12, on the one hand ensure a high mechanical stability and on the other cause a gas-tight closure of the enclosure against the outside environment.
  • the protective cap 14 is supported on a circumferential shoulder 20, so that the protective cap 14 and the upper region of the main body 11 form a flat surface.
  • the magnetic field generating element 17 has a thread 19, with the magnetic field generating element 17 can be screwed onto an external thread of a turbo shaft 5.
  • a hexagon 18 may be formed on the Mag ⁇ netfeld generating element 17.
  • the magnetic member 17 is a mechanically and chemically extremely high stressed component, since due to the extremely high rotational ⁇ number of up to 270 000 U / generating min immense stresses on the magnetic member 17 to act and the magnetic field generating element 17 is exposed to chemically highly reactive gases by the exhaust gas pressure feed into the air inlet 16 of the exhaust gas turbocharger 1.
  • the inventive magnetic field generating Ele ⁇ ment 17 is formed at least in three parts.
  • the Magnetfel ⁇ dSyncde element has a base body 11, a ring-shaped magnet 13 and a formigen Mantelkorper 22nd
  • the base body 11 is made of a high strength metal, that the Mag ⁇ netfeld passes well.
  • a very fine thread 19 can be cut, as a result of which the magnetic field-generating element 17 can be screwed to a turbo ⁇ shaft 5.
  • the base body 11 on the gela ⁇ siege magnet 13 generates a magnetic field that is very well guided by the metal of the base body 11, whereby the sensor 15 can detect the magnetic field of the rotating magnetic field generating also at a relatively great distance element 17th
  • the magnet 13 is completely surrounded by the base body 11 and a jacket body 22 welded thereto.
  • the jacket body 22 is made of a non-magnetic material and serves to receive a turning tool.
  • the jacket body 22 is designed, for example, as a hexagon 18.
  • the jacket body 22 is welded to the base body 11, whereby all forces transmitted to the jacket body 22 by the rotary tool are transmitted directly to the base body 11.
  • the annular magnet 13 is not stressed by these me ⁇ chanic loads. This is very advantageous because the annular magnet consists for example of a sintered rare earth metal, which is known to be very brittle and reacts to mechanical loads with a Materi ⁇ albruch.
  • the magnetic field generating element 17 By at least three-part execution of the magnetic field generating element, it is possible to meet all the requirements that are placed on this element 17.
  • the magnetic field generating element 17 generates a magnetic field with high field strength and on the other hand 17 high forces can be transmitted to the compressor wheel with the magnetic field generating element to ensure safe Ver ⁇ bond between the compressor wheel 9 and the turbo shaft 5.
  • the inventive magnetic field generating member on the gressivitat bie ⁇ tet in the air inlet 16 of the compressor 3 17 ei ⁇ NEN especially advantageous protection of the magnet 13, the complete is constantly surrounded by the base body 11 and the jacket body 22.
  • the basic body 11 is welded gastight to the jacket body 22.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Supercharger (AREA)

Abstract

The invention relates to an element which generates a magnetic field for securing a compressor wheel to a turboshaft of an exhaust-gas turbocharger, having a base body that receives an annular-shaped magnet that rotates with the turboshaft. In order to provide an element which generates a magnetic field for securing a compressor wheel to a turboshaft of an exhaust-gas turbocharger, in which the magnet is protected from mechanical and chemical loads, the element which generates the magnetic field has at least 3 parts that consist of a covering body, a base body and the annular-shaped magnet. Said base body is made out of a high-strength metal that is highly-conductive with the magnetic field, onto which the annular-shaped magnet is mounted and the covering body is made of a non-magnetic material, and is welded to the base body in such a manner that the covering body and the base body form a frame for the magnets.

Description

Beschreibungdescription

Magnetfeld erzeugendes ElementMagnetic field generating element

Die Erfindung betrifft ein Magnetfeld erzeugendes Element zur Befestigung eines Kompressorrades an einer Turbowelle eines Abgasturboladers, mit einem Grundkorper, der einen ringförmigen, mit einer Turbowelle rotierenden Magneten aufnimmt.The invention relates to a magnetic field generating element for fastening a compressor wheel on a turboshaft of an exhaust gas turbocharger, with a Grundkorper receiving an annular, rotating with a turbo shaft magnet.

Die von einer Brennkraftmaschine erzeugte Leistung hangt von der Luftmasse und der Kraftstoffmenge ab, die der Brennkraft¬ maschine zugeführt werden kann. Zur Leistungssteigerung ist es notwendig, der Brennkraftmaschine mehr Verbrennungsluft und Kraftstoff zuzuführen. Diese Leistungssteigerung wird bei einem Saugmotor durch eine Hubraumvergroßerung oder durch die Erhöhung der Drehzahl erreicht. Eine Hubraumvergroßerung fuhrt aber grundsatzlich zu schwereren, in den Abmessungen größeren und damit teureren Brennkraftmaschinen. Die Steigerung der Drehzahl bringt besonders bei größeren Brennkraftma- schinen erhebliche Probleme und Nachteile mit sich.The power generated by an internal combustion engine depends on the air mass and the amount of fuel that can be supplied to the internal combustion ¬ machine. To increase the power, it is necessary to supply the internal combustion engine more combustion air and fuel. This increase in performance is achieved in a naturally aspirated engine by increasing the displacement or by increasing the speed. An increase in displacement leads but basically to heavier, larger in size and thus more expensive internal combustion engines. The increase in the speed brings especial problems and disadvantages with larger internal combustion engines.

Eine viel genutzte technische Losung zur Steigerung der Leis¬ tung einer Brennkraftmaschine ist die Aufladung. Damit be¬ zeichnet man die Vorverdichtung der Verbrennungsluft durch einen Abgasturbolader oder auch mittels eines vom Motor mechanisch angetriebenen Verdichters. Ein Abgasturbolader besteht im Wesentlichen aus einem Verdichter und einer Turbine, die mit einer gemeinsamen Welle verbunden sind und mit der gleichen Drehzahl rotieren. Die Turbine setzt die normaler- weise nutzlos verpuffende Energie des Abgases in Rotations¬ energie um und treibt den Verdichter an. Der Verdichter, der in diesem Zusammenhang auch als Kompressor bezeichnet wird, saugt Frischluft an und fordert die vorverdichtete Luft zu den einzelnen Zylindern des Motors. Der größeren Luftmenge in den Zylindern kann eine erhöhte Kraftstoffmenge zugeführt werden, wodurch die Verbrennungskraftmaschine mehr Leistung abgibt. Der Verbrennungsvorgang wird zudem gunstig beein- flusst, so dass die Verbrennungskraftmaschine einen besseren Gesamtwirkungsgrad erzielt. Darüber hinaus kann der Drehmo¬ mentverlauf einer mit einem Turbolader aufgeladenen Brennkraftmaschine äußerst gunstig gestaltet werden.A much used technical solution for increasing the performance of an internal combustion engine is charging. Thus ¬ be to draw the pre-compression of the combustion air by an exhaust gas turbocharger or also by means of a mechanically driven by the engine compressor. An exhaust gas turbocharger consists essentially of a compressor and a turbine, which are connected to a common shaft and rotate at the same speed. The turbine converts the normally useless deflagrating energy of the exhaust gas into rotation ¬ energy and drives the compressor. The compressor, also referred to in this context as a compressor, draws in fresh air and demands the pre-compressed air to the individual cylinders of the engine. The larger amount of air in the cylinders can be fed an increased amount of fuel, whereby the internal combustion engine gives more power. The combustion process is also favorably affected. flows, so that the internal combustion engine achieves a better overall efficiency. In addition, the Torque ¬ ment running a supercharged with a turbocharger internal combustion engine can be made extremely favorable.

Bei zunehmender Abgasmenge kann die maximal zulassige Dreh¬ zahl der Kombination aus dem Turbinenrad, dem Kompressorrad und der Turbowelle, die auch als Laufzeug des Abgasturbola¬ ders bezeichnet wird, überschritten werden. Bei einer unzu- lassigen Überschreitung der Drehzahl des Laufzeuges wurde dieses zerstört werden, was einem Totalschaden des Turbola¬ ders gleichkäme. Gerade moderne und kleine Turbolader mit deutlich kleineren Turbinen- und Kompressorraddurchmessern, die durch ein erheblich kleineres Massentragheitsmoment ein verbessertes Drehbeschleunigungsverhalten aufweisen, werden vom Problem der Überschreitung der zulassigen Hochstdrehzahl betroffen. Je nach Auslegung des Turboladers fuhrt schon eine Überschreitung der Drehzahlgrenze um etwa 5 % zur kompletten Zerstörung des Turboladers.With increasing amount of exhaust gas, the maximum permissible rotation ¬ number of combination of the turbine, the compressor and the turbine shaft, which is also referred to as the rotating parts of the Abgasturbola ¬ DERS may be exceeded. In an insufficient lassigen exceeding the speed of the rotating parts of this was to be destroyed, which would amount to a total loss of Turbola ¬ id. Especially modern and small turbochargers with significantly smaller turbine and Kompressorraddurchmessern, which have a significantly lower mass moment of inertia improved spin performance, are affected by the problem of exceeding the maximum permissible speed. Depending on the design of the turbocharger, exceeding the speed limit by approximately 5% already leads to the complete destruction of the turbocharger.

Die noch nicht veröffentlichte deutsche Patentanmeldung mit dem Anmeldeaktenzeichen 10 2004 052 695.8 offenbart einen Abgasturbolader mit einem Sensor am kompressorseitigen Ende der Turbowelle zur direkten Messung der Drehzahl der Turbowelle. Der Sensor wird hier durch das Kompressorgehause gefuhrt und auf ein Element zur Variation eines Magnetfeldes gerichtet. Das Element zur Variation des Magnetfeldes ist als Permanent¬ magnet ausgebildet, der in einem Befestigungselement angeord¬ net ist. Das Befestigungselement weist eine Einfassung auf, in der der Magnet gelagert ist, wobei er direkt auf dem Kom¬ pressorrad aufliegt. Wird das Befestigungselement mit dem ge¬ wünschten Anzugsdrehmoment gegen das Kompressorrad gedruckt, so entstehen Kräfte, die vom Permanentmagneten aufgenommen werden müssen. Das spröde Material des Magneten kann dadurch beschädigt werden. Darüber hinaus können Gase im Lufteinlass des Kompressors den Permanentmagnet chemisch angreifen und beschädigen . Die Aufgabe der vorliegenden Erfindung ist es daher, ein Magnetfeld erzeugendes Element zur Befestigung eines Kompressor¬ rades an einer Turbowelle eines Abgasturboladers anzugeben, bei dem der Magnet vor mechanischen und chemischen Belastun- gen geschützt ist.The not yet published German patent application with the registration file 10 2004 052 695.8 discloses an exhaust gas turbocharger with a sensor at the compressor end of the turbo shaft for direct measurement of the speed of the turbo shaft. The sensor is guided here through the compressor housing and directed to an element for varying a magnetic field. The element for varying the magnetic field is designed as a permanent magnet ¬ which is angeord ¬ net in a fastener. The fastening element has an enclosure, in which the magnet is mounted, wherein it rests directly on the Kom ¬ pressorrad. If the fastening element is pressed against the compressor wheel with the desired tightening torque, forces arise which must be absorbed by the permanent magnet. The brittle material of the magnet can be damaged. In addition, gases in the air inlet of the compressor can chemically attack and damage the permanent magnet. The object of the present invention is therefore to provide a magnetic field generating element for fastening a compressor wheel ¬ on a turboshaft of an exhaust gas turbocharger, in which the magnet is protected against mechanical and chemical loads.

Diese Aufgabe wird erfindungsgemaß durch die Merkmale des un¬ abhängigen Anspruchs 1 gelost.This object is achieved according to the invention by the features of independent claim 1.

Dadurch, dass das Magnetfeld erzeugende Element mindestens dreiteilig, aus einem Mantelkorper, dem Grundkorper und dem ringförmigen Magneten aufgebaut ist, wobei der Grundkorper aus einem das Magnetfeld gut leitenden, hochfesten Metall be¬ steht, auf dem der ringförmige Magnet gelagert ist und der Mantelkorper aus einem nichtmagnetischen Material besteht, und mit dem Grundkorper derart verschweißt ist, dass der Man¬ telkorper und der Grundkorper für den Magneten eine Einfassung bilden, können hohe Anzugsdrehmomente auf das Magnetfeld erzeugende Element übertragen werden, womit das Kompressorrad sicher an der Turbowelle befestigt werden kann. Das Anzug¬ drehmoment wird von dem Mantelkorper direkt auf den Grundkorper übertragen und der Magnet wird mechanisch nicht beansprucht. Der hochfeste Grundkorper bildet eine gute Verbin¬ dung zur Turbowelle und leitet das vom Magnet erzeugte Mag- netfeld zum Sensor. Der Mantelkorper bildet zusammen mit dem Grundkorper eine hermetisch gasdichte Einfassung. Hierdurch wird das Eindringen chemisch reaktiver Gase in die Einfassung verhindert und der Magnet wird nachhaltig vor Korrosion ge¬ schützt. Die erfindungsgemaße mindestens dreiteilige Ausbil- düng des Magnetfeld erzeugenden Elementes ermöglicht es, so¬ wohl deren mechanische als auch deren magnetischen Eigenschaften optimal zu gestalten.Characterized in that the magnetic field generating element is at least in three parts, of a Mantelkorper, the Grundkorper and the annular magnet is formed, wherein the Grundkorper from the magnetic good conducting, high-strength metal be ¬ on which the annular magnet is mounted and the Mantelkorper from a non-magnetic material, and is welded to the Grundkorper so that the Man ¬ telkorper and the body for the magnet form an enclosure, high tightening torques can be transmitted to the magnetic field generating element, so that the compressor can be securely attached to the turbo shaft. The tightening ¬ torque is transmitted from the Mantelkorper directly on the base body and the magnet is not mechanically stressed. The high-strength base body forms a good Verbin ¬ dung to the turboshaft and forwards the Mag- generated by the magnetic netfeld to the sensor. The mantle body together with the basic body forms a hermetically gastight enclosure. In this way, the penetration of chemically reactive gases is prevented into the enclosure and the magnet is ge ¬ protects permanently against corrosion. The inventive at least three-part Ausbil- fertil of the magnetic field generating element makes it possible so ¬ probably their mechanical and their magnetic properties optimally.

Bei einer Ausgestaltung ist in dem Grundkorper ein Gewinde zur Verschraubung des Magnetfeld erzeugenden Elementes mit einem Gewinde auf der Turbowelle ausgebildet. Der Grundkorper aus hochfestem Metall kann besonders feine Gewinde aufnehmen, wodurch das Kompressorrad mit einer großen Kraft gegen die Turbowelle verschraubt werden kann. Dabei ist es vorteilhaft, wenn der Grundkorper aus 17-4PH Stahl (auch bekannt als 1.4542 oder 1.4548 Stahl) besteht. Dieser Stahl leitet das Manetfeld sehr gut und lasst sich gut schweißen. Die Festig¬ keit dieses Stahls ist extrem hoch.In one embodiment, a thread for screwing the magnetic field generating element is formed with a thread on the turbo shaft in the Grundkorper. The base made of high-strength metal can take up particularly fine threads, whereby the compressor wheel can be screwed with a large force against the turbo shaft. It is advantageous if the basic body of 17-4PH steel (also known as 1.4542 or 1.4548 steel) exists. This steel manages the manet field very well and is easy to weld. The Festig ¬ ness of this steel is extremely high.

Bei einer Weiterbildung enthalt der ringförmige Magnet Selte¬ neerden-Metalle. Selteneerden-Magnete wie zum Beispiel NdFeB- oder SmCo- Magnete erzeugen ein relativ hohes magnetischesIn one development, the annular magnet contains Selte ¬ neerden metals. Rare earth magnets such as NdFeB or SmCo magnets produce a relatively high magnetic

Feld, was auch von einem relativ weit entfernten Sensor noch gut detektiert werden kann.Field, which can still be well detected by a relatively distant sensor.

Bei einer Ausgestaltung besteht der Mantelkorper aus VA-Stahl (zum Beispiel 1.4301 Stahl) . Dieser Stahl lasst sich gut mit dem Material des Grundkorpers verschweißen, wobei der Mantel¬ korper mit geringem Aufwand geometrisch ausgestaltet werden kann, so dass er zur Aufnahme eines Drehwerkzeuges dienen kann .In one embodiment, the jacket body is made of VA steel (for example, 1.4301 steel). This steel can be welded well with the material of the basic body, wherein the jacket ¬ body can be geometrically designed with little effort, so that it can serve to accommodate a turning tool.

Ausfuhrungsformen der Erfindung werden in den Figuren beispielhaft dargestellt. Es zeigt:Embodiments of the invention are exemplified in the figures. It shows:

Figur 1: einen Abgasturbolader mit einer Turbine und einem Kompressor,1 shows an exhaust gas turbocharger with a turbine and a compressor,

Figur 2: den Kompressor in einer Schnittdarstellung,2: the compressor in a sectional view,

Figur 3: ein Magnetfeld erzeugendes Element nach dem Stand der Technik,FIG. 3: a magnetic field generating element according to the prior art,

Figur 4: eine erfindungsgemaßes Magnetfeld erzeugendes Ele¬ ment .FIG. 4 shows a magnetic field generating element according to the invention.

Figur 1 zeigt einen Abgasturbolader 1 mit einer Turbine 2 und einem Kompressor 3. In dem Kompressor 3 ist das Kompressorrad 9 drehbar gelagert und mit der Turbowelle 5 verbunden. Auch die Turbowelle 5 ist drehbar gelagert und an ihrem anderen Ende mit dem Turbinenrad 4 verbunden. Die Kombination aus Kompressorrad 9, Turbowelle 5 und Turbinenrad 4 wird auch als Laufzeug bezeichnet. Über den Turbineneinlass 7 wird heißes Abgas von einer hier nicht dargestellten Verbrennungskraftma¬ schine in die Turbine 2 eingelassen, wobei das Turbinenrad 4 in Drehung versetzt wird. Der Abgasstrom verlasst die Turbine 2 durch den Turbinenauslass 8. Über die Turbowelle 5 ist das Turbinenrad 4 mit dem Kompressorrad 9 verbunden. Damit treibt die Turbine 2 den Kompressor 3 an. In den Kompressor 3 wird Luft durch den Lufteinlass 16 eingesaugt, die dann im Kom¬ pressor 3 verdichtet und über den Luftauslass 6 der Verbren¬ nungskraftmaschine zugeführt wird.1 shows an exhaust gas turbocharger 1 with a turbine 2 and a compressor 3. In the compressor 3, the compressor wheel 9 is rotatably mounted and connected to the turbo shaft 5. Also the turbo shaft 5 is rotatably mounted and connected at its other end to the turbine wheel 4. The combination of compressor wheel 9, turbo shaft 5 and turbine wheel 4 is also referred to as a running tool. Hot exhaust gas is introduced from an unillustrated here Verbrennungskraftma ¬ machine into the turbine 2 via the turbine inlet 7, wherein the turbine wheel is set in rotation. 4 The exhaust gas flow leaves the turbine 2 through the turbine outlet 8. The turbine shaft 4 is connected to the compressor wheel 9 via the turbo shaft 5. Thus, the turbine 2 drives the compressor 3. In the compressor 3, air is sucked through the air inlet 16, which is then compressed in Kom ¬ pressor 3 and fed via the air outlet 6 of the internal combustion ¬ combustion engine.

Figur 2 zeigt den Kompressor 3 in einer Schnittdarstellung.Figure 2 shows the compressor 3 in a sectional view.

In dem Kompressorgehause ist das Kompressorrad 9 zu erkennen. Das Kompressorrad 9 ist auf der Turbowelle 5 mit dem Magnet¬ feld erzeugenden Element 17 befestigt. Das Magnetfeld erzeu¬ gende Element 17 befindet sich damit im Lufteinlass 16 des Kompressors 3. Das Magnetfeld erzeugende Element 17 kann zum Beispiel als Hutmutter ausgebildet sein, die auf ein auf der Turbowelle 5 aufgebrachtes Gewinde aufgeschraubt wird, um das Kompressorrad 9 gegen einen Bund der Turbowelle 5 mit dieser fest zu verspannen. In dem Magnetfeld erzeugenden Element 17 zur Befestigung des Kompressorrad 9 an der Turbowelle 5 be¬ findet sich ein ringförmiger Permanentmagnet 13. Der Magnet 13 dreht sich bei der Rotation der Turbowelle 5 mit dieser um die Rotationsachse der Turbowelle 5. Dabei erzeugt der Magnet 13 eine Änderung der magnetischen Feldstarke bzw. des magne- tischen Feldgradienten in dem Sensor 15. Diese Änderung desIn the compressor housing the compressor wheel 9 can be seen. The compressor wheel 9 is mounted on the turbo shaft 5 with the magnetic ¬ field generating element 17. The magnetic field erzeu ¬ constricting element 17 is therefore located in the air inlet 16 of the compressor 3. The magnetic field generating member 17 can be formed, for example, as a cap nut, which is screwed to an applied on the turboshaft 5 threaded to the compressor wheel 9 of against a collar Turbowelle 5 with this firm to brace. In the magnetic field generating element 17 for fastening the compressor wheel 9 to the turbo shaft 5 be ¬ is an annular permanent magnet 13. The magnet 13 rotates during rotation of the turbo shaft 5 with this about the axis of rotation of the turbo shaft 5. In this case, the magnet 13 generates a Change in the magnetic field strength or the magnetic field gradient in the sensor 15. This change in the

Magnetfeldes bzw. des Feldgradienten erzeugt im Sensor 15 ein elektronisch verarbeitbares Signal, das proportional zur Drehzahl der Turbowelle 5 ist.Magnetic field or field gradient generated in the sensor 15 an electronically processable signal which is proportional to the speed of the turbo shaft 5.

In einer seitlichen Schnittdarstellung zeigt Figur 3 ein Magnetfeld erzeugende Element 17 zur Befestigung eines Kompres¬ sorrades 9 an einer Turbowelle 5 nach dem Stand der Technik. Der Grundkorper 11 weist eine Einfassung 10 auf, in die der Permanentmagnet 13 eingepasst ist. Zum Schutz des Magneten 13 vor mechanischen Belastungen und chemisch reaktiven Gasen ist die Einfassung 10 mit einer Schutzkappe 14 verschlossen. Das Verschließen der Einfassung 10 mit der Schutzkappe 14 kann durch das Aufbringen von Schweißnahten 12 erfolgen, die einerseits eine hohe mechanische Stabilität gewahrleisten und zum anderen einen gasdichten Abschluss der Einfassung gegen die äußere Umgebung bewirken.In a lateral sectional view of Figure 3 shows a magnetic field generating member 17 for fixing a Kompres ¬ sorrades 9 to a turboshaft 5 according to the prior art. The basic body 11 has a casing 10 into which the permanent magnet 13 is fitted. To protect the magnet 13 against mechanical stresses and chemically reactive gases, the enclosure 10 is closed with a protective cap 14. The closure of the enclosure 10 with the protective cap 14 can be done by the application of welds 12, on the one hand ensure a high mechanical stability and on the other cause a gas-tight closure of the enclosure against the outside environment.

In diesem Beispiel stutzt sich die Schutzkappe 14 auf einen umlaufenden Absatz 20 ab, so dass die Schutzkappe 14 und der obere Bereich des Grundkorpers 11 eine ebene Flache bilden. Darüber hinaus weist das Magnetfeld erzeugende Element 17 ein Gewinde 19 auf, mit dem das Magnetfeld erzeugende Element 17 auf ein Außengewinde einer Turbowelle 5 aufgeschraubt werden kann. Zum Ansetzen eines Schraubwerkzeuges kann an dem Mag¬ netfeld erzeugenden Element 17 zum Beispiel ein Sechskant 18 ausgebildet sein.In this example, the protective cap 14 is supported on a circumferential shoulder 20, so that the protective cap 14 and the upper region of the main body 11 form a flat surface. In addition, the magnetic field generating element 17 has a thread 19, with the magnetic field generating element 17 can be screwed onto an external thread of a turbo shaft 5. To attach a screwing tool, for example, a hexagon 18 may be formed on the Mag ¬ netfeld generating element 17.

Es sei betont, dass es sich bei dem Magnetfeld erzeugenden Element 17 um ein mechanisch und chemisch extrem hoch belastetes Bauteil handelt, da aufgrund der enorm hohen Dreh¬ zahl von bis zu 270 000 U/min immense Belastungen auf das Magnetfeld erzeugende Element 17 einwirken und durch die Ab- gasruckfuhrung in den Lufteinlass 16 des Abgasturboladers 1 das Magnetfeld erzeugende Element 17 chemisch hoch reaktiven Gasen ausgesetzt ist.It should be emphasized that it is produced in the magnetic member 17 is a mechanically and chemically extremely high stressed component, since due to the extremely high rotational ¬ number of up to 270 000 U / generating min immense stresses on the magnetic member 17 to act and the magnetic field generating element 17 is exposed to chemically highly reactive gases by the exhaust gas pressure feed into the air inlet 16 of the exhaust gas turbocharger 1.

Um diesen hohen Anforderungen gerecht zu werden, wird ein in Figur 4 dargestelltes Magnetfeld erzeugendes Element 17 vor¬ geschlagen. Das erfindungsgemaße Magnetfeld erzeugende Ele¬ ment 17 ist mindestens dreiteilig ausgebildet. Das Magnetfel¬ derzeugende Element weist einen Grundkorper 11, einen ring- formigen Magnet 13 und einen Mantelkorper 22 auf. Der Grundkorper 11 besteht aus einem hochfesten Metall, dass das Mag¬ netfeld gut leitet. In das hochfeste Metall des Grundkorpers 11 kann ein sehr feines Gewinde 19 geschnitten werden, wodurch das Magnetfeld erzeugende Element 17 mit einer Turbo¬ welle 5 verschraubt werden kann. Durch das sehr feine Gewinde 19 kann ein hohes Anzugsdrehmoment auf das Magnetfeld erzeu- gende Element 17 übertragen werden, womit das Kompressorrad sehr fest an die Turbowelle 5 gepresst werden kann, woraus sich eine sehr stabile Verbindung zwischen dem Kompressorrad und der Turbowelle 5 ergibt. Der auf dem Grundkorper 11 gela¬ gerte Magnet 13 erzeugt ein Magnetfeld, das vom Metall des Grundkorpers 11 sehr gut geleitet wird, wodurch der Sensor 15 auch in relativ großer Entfernung das Magnetfeld des sich drehenden Magnetfeld erzeugenden Elements 17 erfassen kann. Der Magnet 13 wird von dem Grundkorper 11 und einem mit diesem verschweißten Mantelkorper 22 vollständig umgeben. Der Mantelkorper 22 besteht aus einem nicht magnetischen Material und er dient zur Aufnahme eines Drehwerkzeuges. Dazu ist der Mantelkorper 22 beispielsweise als Sechskant 18 ausgebildet. Der Mantelkorper 22 ist mit dem Grundkorper 11 verschweißt, wodurch alle an den Mantelkorper 22 durch das Drehwerkzeug übertragenen Kräfte direkt auf den Grundkorper 11 weitergeleitet werden. Der ringförmige Magnet 13 wird durch diese me¬ chanischen Belastungen nicht beansprucht. Dies ist sehr vorteilhaft, da der ringförmige Magnet beispielsweise aus einem gesinterten selteneerden-Metall besteht, das bekanntlich sehr spröde ist und auf mechanische Belastungen mit einem Materi¬ albruch reagiert. Durch die mindestens dreiteilige Ausfuhrung des Magnetfeld erzeugenden Elementes wird es möglich, alle Anforderungen, die an dieses Element 17 gestellt werden, zu erfüllen. Zum einen erzeugt das Magnetfeld erzeugende Element 17 ein magnetisches Feld mit hoher Feldstarke und zum anderen können mit dem Magnetfeld erzeugenden Element 17 hohe Kräfte auf das Kompressorrad übertragen werden, um eine sichere Ver¬ bindung zwischen dem Kompressorrad 9 und der Turbowelle 5 zu gewahrleisten. Auch im Hinblick auf die hohe chemische Ag- gressivitat auf der im Lufteinlass 16 des Kompressors 3 bie¬ tet das erfindungsgemaße Magnetfeld erzeugende Element 17 ei¬ nen besonders vorteilhaften Schutz des Magneten 13, der voll- standig von dem Grundkorper 11 und dem Mantelkorper 22 umgeben ist. Dazu ist der Grundkorper 11 mit dem Mantelkorper 22 gasdicht verschweißt. In order to meet these high requirements, an illustrated in Figure 4 magnetic field generating element 17 is beaten before ¬ . The inventive magnetic field generating Ele ¬ ment 17 is formed at least in three parts. The Magnetfel ¬ derzeugende element has a base body 11, a ring-shaped magnet 13 and a formigen Mantelkorper 22nd The base body 11 is made of a high strength metal, that the Mag ¬ netfeld passes well. In the high-strength metal of the main body 11, a very fine thread 19 can be cut, as a result of which the magnetic field-generating element 17 can be screwed to a turbo ¬ shaft 5. Due to the very fine thread 19, a high tightening torque can be transmitted to the magnetic field generating element 17, whereby the compressor wheel can be pressed very firmly against the turbo shaft 5, resulting in a very stable connection between the compressor wheel and the turbo shaft 5. The base body 11 on the gela ¬ siege magnet 13 generates a magnetic field that is very well guided by the metal of the base body 11, whereby the sensor 15 can detect the magnetic field of the rotating magnetic field generating also at a relatively great distance element 17th The magnet 13 is completely surrounded by the base body 11 and a jacket body 22 welded thereto. The jacket body 22 is made of a non-magnetic material and serves to receive a turning tool. For this purpose, the jacket body 22 is designed, for example, as a hexagon 18. The jacket body 22 is welded to the base body 11, whereby all forces transmitted to the jacket body 22 by the rotary tool are transmitted directly to the base body 11. The annular magnet 13 is not stressed by these me ¬ chanic loads. This is very advantageous because the annular magnet consists for example of a sintered rare earth metal, which is known to be very brittle and reacts to mechanical loads with a Materi ¬ albruch. By at least three-part execution of the magnetic field generating element, it is possible to meet all the requirements that are placed on this element 17. On the one hand, the magnetic field generating element 17 generates a magnetic field with high field strength and on the other hand 17 high forces can be transmitted to the compressor wheel with the magnetic field generating element to ensure safe Ver ¬ bond between the compressor wheel 9 and the turbo shaft 5. Also in view of the high chemical Ag, the inventive magnetic field generating member on the gressivitat bie ¬ tet in the air inlet 16 of the compressor 3 17 ei ¬ NEN especially advantageous protection of the magnet 13, the complete is constantly surrounded by the base body 11 and the jacket body 22. For this purpose, the basic body 11 is welded gastight to the jacket body 22.

Claims

Patentansprüche claims 1. Magnetfeld erzeugendes Element (17) zur Befestigung eines Kompressorrades (9) an einer Turbowelle (5) eines Abgas- turboladers (1), mit einem Grundkorper (11), der einen ringförmigen, mit einer Turbowelle (5) rotierenden Magneten (13) aufnimmt, d a d u r c h g e k e n n z e i c h n e t , dass das Magnetfeld erzeugende Element (17) min¬ destens dreiteilig, aus einem Mantelkorper (22), dem Grundkorper (11) und dem ringförmigen Magneten (13) aufgebaut ist, wobei der Grundkorper (11) aus einem das Mag¬ netfeld gut leitenden, hochfesten Metall besteht, auf dem der ringförmige Magnet (13) gelagert ist und der Mantel¬ korper (22) aus einem nichtmagnetischen Material besteht, und mit dem Grundkorper (11) derart verschweißt ist, dass der Mantelkorper (22) und der Grundkorper (11) für den Magneten (13) eine Einfassung (10) bilden.A magnetic field generating element (17) for fastening a compressor wheel (9) to a turbo shaft (5) of an exhaust gas turbocharger (1), comprising a base body (11) having an annular magnet (13) rotating with a turbo shaft (5) ), characterized in that the magnetic field generating member (17) min ¬ least three parts, (a Mantelkorper 22), the base body (11) and (the annular magnet 13) is constructed, wherein the base body (11) made of a mag ¬ netfeld good conductive, high-strength metal exists on which the annular magnet (13) is mounted and the jacket ¬ body (22) consists of a non-magnetic material, and with the base body (11) is welded such that the Mantelkorper (22) and the base (11) for the magnet (13) form a skirt (10). 2. Magnetfeld erzeugendes Element (17) zur Befestigung eines Kompressorrades (9) nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass in dem Grundkorper (11) ein Gewinde (19) zur Verschraubung des Magnetfeld erzeu¬ genden Elementes (17) mit einem Gewinde auf der Turbowel¬ le (5) ausgebildet ist.2. magnetic field generating element (17) for fastening a compressor wheel (9) according to claim 1, characterized in that in the basic body (11) has a thread (19) for screwing the magnetic field erzeu ¬ ing element (17) with a thread on the turbo shaft ¬ le (5) is formed. 3. Magnetfeld erzeugendes Element (17) zur Befestigung eines Kompressorrades (9) nach Anspruch 1 oder 2, d a ¬ d u r c h g e k e n n z e i c h n e t , dass der Grundkor¬ per (11) aus 17-4PH Stahl besteht.3. magnetic field generating element (17) for fastening a compressor wheel (9) according to claim 1 or 2, since ¬ characterized in that the Grundkor ¬ by (11) consists of 17-4PH steel. 4. Magnetfeld erzeugendes Element (17) zur Befestigung eines Kompressorrades (9) nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass der ringförmige Magnet (13) Selteneerden-Metalle enthalt.4. Magnetic field generating element (17) for mounting a compressor wheel (9) according to claim 1, characterized in that the annular magnet (13) contains rare earth metals. 5. Magnetfeld erzeugendes Element (17) zur Befestigung eines Kompressorrades (9) nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass der Mantelkorper (22) aus VA-Stahl besteht.5. magnetic field generating element (17) for fixing a compressor wheel (9) according to claim 1, characterized in that the jacket body (22) consists of VA steel. 6. Magnetfeld erzeugendes Element (17) zur Befestigung eines Kompressorrades (9) nach mindestens einem der vorgenann¬ ten Ansprüche, da du r c h g e k e n n z e i c h n e t , dass der Mantelkorper (22) mit dem Grundkorper (11) gasdicht verschweißt ist. 6. magnetic field generating element (17) for fastening a compressor wheel (9) according to at least one of vorgenann ¬ th claims, since you rchgekennzeichnet that the Mantelkorper (22) with the Grundkorper (11) is gas-tight welded.
PCT/EP2008/056885 2007-07-03 2008-06-04 Element which generates a magnetic field Ceased WO2009003782A2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019201880A1 (en) 2018-04-15 2019-10-24 MAX-PLANCK-Gesellschaft zur Förderung der Wissenschaften e.V. Method of producing autotrophic microorganisms with altered photorespiration and improved co2 fixation

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS568552A (en) * 1979-07-02 1981-01-28 Toyota Motor Corp Revolving speed detector for turbo-charger
DE4311398C2 (en) * 1993-04-07 2000-12-28 Kobold Klaus Impeller for flow meters
DE19601271A1 (en) * 1996-01-16 1997-07-24 Michael Donner Magnetic pole rotor for speed measurement
DE19936536A1 (en) * 1999-08-03 2001-02-08 Heidenhain Gmbh Dr Johannes Cylindrical magnetic measuring body uses a solder joint between its base body and cover element, the magnetic body has poles separated by a plastic dividing body so that a periodic magnetic field is produced
JP2004077318A (en) * 2002-08-20 2004-03-11 Uchiyama Mfg Corp Magnetic encoder
DE102004052695A1 (en) 2004-10-29 2007-05-10 Siemens Ag turbocharger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019201880A1 (en) 2018-04-15 2019-10-24 MAX-PLANCK-Gesellschaft zur Förderung der Wissenschaften e.V. Method of producing autotrophic microorganisms with altered photorespiration and improved co2 fixation

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