DE102012013199A1 - Electromotor generator has rotor that is stabilized with compressed air at desired small distance in axial direction of stators - Google Patents
Electromotor generator has rotor that is stabilized with compressed air at desired small distance in axial direction of stators Download PDFInfo
- Publication number
- DE102012013199A1 DE102012013199A1 DE201210013199 DE102012013199A DE102012013199A1 DE 102012013199 A1 DE102012013199 A1 DE 102012013199A1 DE 201210013199 DE201210013199 DE 201210013199 DE 102012013199 A DE102012013199 A DE 102012013199A DE 102012013199 A1 DE102012013199 A1 DE 102012013199A1
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- DE
- Germany
- Prior art keywords
- stators
- electric motor
- generator according
- rotor
- compressed air
- 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.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/086—Structural association with bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
- H02K7/088—Structural association with bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly radially supporting the rotor directly
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
Es ist bekannt, dass Elektromotoren bzw. Generatoren, also elektrische Maschinen die meistens aus feststehendem Stator und sich drehendem Rotor bestehen, in flacher Bauart, also mit einem Durchmesser, der deutlich größer ist als die Baulänge in axialer Richtung strukturiert werden. Dies geschieht, um elektrische, elektromagnetische und/oder permanentmagnetische Elemente besonders vorteilhaft anzuordnen. Dabei muss der Spalt axial sehr genau fixiert werden, was bei üblicher Lagerung durch Kugellager problematisch ist. Bei den häufiger gebauten Elektromotoren mit trommelförmigem Rotor wird der Spalt radial hinreichend genau durch Kugellager definiert, wobei nur das Spiel der relativ weit auseinander liegenden Lager nur einen direkt proportionalen Einfluss auf den Luftspalt zwischen Stator und Rotor hat, was im allgemeinen unproblematisch ist. Dieser, für den Wirkungsgrad des Motors sehr wichtige Luftspalt, wird jedoch bei scheibenförmiger Bauart axial definiert. Der naturgemäß geringe Abstand der Wellenlagerung bei großem Durchmesser bedeutet dann, dass durch das Lagerspiel bedingt auch Neigungen der Achse möglich sind. Diese bewirken besonders in den äußeren Bereichen des scheibenförmigen Motors, dort wo vorteilhafterweise die elektromagnetischen und permanentmagnetischen Elemente flach ringartig angeordnet sind, überproportionale Änderungen des axialen Abstandes und damit einen insgesamt zu weiten Luftspalt, der dem Wirkungsgrad abträglich ist.It is known that electric motors or generators, ie electrical machines which usually consist of a stationary stator and a rotating rotor, are structured in a flat design, that is, with a diameter that is significantly greater than the overall length in the axial direction. This is done in order to arrange electrical, electromagnetic and / or permanent magnetic elements particularly advantageous. The gap must be axially fixed very precisely, which is problematic in conventional storage by ball bearings. In the more frequently built electric motors with a drum-shaped rotor, the gap is defined radially sufficiently accurately by ball bearings, whereby only the play of relatively widely spaced bearings has only a directly proportional influence on the air gap between the stator and rotor, which is generally not a problem. However, this air gap, which is very important for the efficiency of the engine, is defined axially in the case of a disc-shaped design. The naturally small distance of the shaft bearing with a large diameter then means that due to the bearing clearance and inclinations of the axis are possible. These cause particularly in the outer regions of the disc-shaped motor, where advantageously the electromagnetic and permanent magnetic elements are arranged flat ring-like, disproportionate changes in the axial distance and thus a total too wide air gap, which is detrimental to the efficiency.
Dieses Problem wird erfindungsgemäß dadurch gelöst, dass Druckluft in geeigneter Weise in die beiden Spalten zwischen Rotoren und Stator eingeblasen wird. Da sich bei abnehmender Spaltweite der Luftdruck im Spalt erhöht und bei zunehmender Spaltweite absenkt, reguliert sich das System trotz des notwendigen Lagerspiels auf eine optimale gleichmäßige Spaltweite ein, sofern, vorzugsweise durch mechanische Federkraft, eine Gegenkraft zu der durch den Luftdruck erzeugen Kraft gegeben ist. Erfindungsgemäß kann diese Federkraft jedoch auch selbst wieder durch Druckluft erzeugt werden, welche zwischen den Statorelementen und dem vorzugsweise flachen Gehäuseseiten wirkt.This problem is inventively achieved in that compressed air is injected in a suitable manner in the two columns between rotors and stator. Since the air pressure increases in the gap with decreasing gap width and lowers with increasing gap width, the system, despite the necessary clearance on an optimal uniform gap width, if, preferably by mechanical spring force, a counterforce to the force generated by the air pressure is given. According to the invention, however, this spring force can also be generated again by compressed air, which acts between the stator elements and the preferably flat sides of the housing.
Dabei kann die notwendige relative, axiale Beweglichkeit des Stators zu den Rotoren erfindungsgemäß durch elastische Verbindung des Stators zur Welle und/oder Lagerspiel bei gleichzeitiger axialer Beweglichkeit eines Stators gewährleistet sein. Bei starrer Verbindung zwischen Rotor und Welle und fehlendem Lagerspiel in axialer Richtung müssen beide Statoren axial beweglich sein.The necessary relative axial mobility of the stator to the rotors can be ensured according to the invention by elastic connection of the stator to the shaft and / or bearing clearance with simultaneous axial mobility of a stator. For a rigid connection between rotor and shaft and lack of clearance in the axial direction both stators must be axially movable.
Wegen der Komplexität der elektromagnetischen bzw. permanentmagnetischen Strukturen müssen in den Statoren geschickt angepasste Bohrungen sein, die in die engen Spalten zwischen Stator und Rotoren münden. Die Luftversorgung dieser Bohrungen geschieht vorteilhaft durch umlaufende Nuten, die vorzugsweise in Versorgungsringen sind, welche auf die Statoren in geeigneter Weise aufgesetzt sind, und vorzugsweise die Stutzen für die Druckluftzuführung aufnehmen. Diese Ringe enthalten außerdem günstigerweise axiale Bohrungen, damit der jeweils daran befestigte Stator axial beweglich auf Bolzen gelagert werden kann, wobei letztere gleichzeitig die tangentialen Reaktionskräfte aus dem Drehmoment aufnehmen müssen. Zur Verteilung der Druckluft können erfindungsgemäß aber auch Kanalstrukturen auf Stator oder Rotor dienen, sofern sich dieses mit den elektrischen oder elektromagnetischen Elementen verträgt.Because of the complexity of the electromagnetic or permanent-magnetic structures, well-adapted holes must be in the stators, which open into the narrow gaps between the stator and rotors. The air supply of these holes is advantageously done by circumferential grooves, which are preferably in supply rings, which are placed on the stators in a suitable manner, and preferably receive the nozzle for the compressed air supply. These rings also conveniently contain axial bores so that each attached thereto stator can be axially movably mounted on bolts, the latter must simultaneously absorb the tangential reaction forces from the torque. For distributing the compressed air, channel structures on the stator or rotor may also serve according to the invention, provided that this is compatible with the electrical or electromagnetic elements.
Es ist erfindungsgemäß auch möglich, die Ab- oder Einleitung der Rotationsenergie über ein oder mehrere Achsen vorzunehmen, die direkt am Innenradius des Rotors vorzugsweise in einen Zahnkranz eingreifen, und in bekannter Weise in ein Planetengetriebe führen. Analog kann der Rotor auch in der Nähe seines Innenradius mittels mehrerer Wälzlagern, oder bei langsamer Drehung, z. B. für Positionierungsaufgaben, durch ein großes Gleitlager geführt werden. Generell sind erfindungsgemäß auch paketartige Bauweisen möglich, wobei in Achsrichtung Rotoren und Statoren abwechselnd angeordnet sind.It is also possible according to the invention to carry out the discharge or initiation of the rotational energy via one or more axes, which engage directly at the inner radius of the rotor, preferably in a ring gear, and lead in a known manner in a planetary gear. Similarly, the rotor can also near its inner radius by means of multiple bearings, or at slow rotation, z. B. for positioning tasks, are guided by a large sliding bearing. In general, packet-like constructions according to the invention are also possible, wherein rotors and stators are arranged alternately in the axial direction.
Vorteilhafte Ausgestaltungen der Erfindung sind in den Patentansprüchen 2 bis 15 angegeben.Advantageous embodiments of the invention are specified in the
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im Folgenden näher beschrieben.An embodiment of the invention is illustrated in the drawing and will be described in more detail below.
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Claims (15)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210013199 DE102012013199A1 (en) | 2011-10-08 | 2012-07-03 | Electromotor generator has rotor that is stabilized with compressed air at desired small distance in axial direction of stators |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011115945.6 | 2011-10-08 | ||
DE102011115945 | 2011-10-08 | ||
DE201210013199 DE102012013199A1 (en) | 2011-10-08 | 2012-07-03 | Electromotor generator has rotor that is stabilized with compressed air at desired small distance in axial direction of stators |
Publications (1)
Publication Number | Publication Date |
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DE102012013199A1 true DE102012013199A1 (en) | 2013-04-11 |
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DE201210013199 Pending DE102012013199A1 (en) | 2011-10-08 | 2012-07-03 | Electromotor generator has rotor that is stabilized with compressed air at desired small distance in axial direction of stators |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103501081A (en) * | 2013-10-12 | 2014-01-08 | 山东理工大学 | Engine exhaust-gas turbine drive permanent magnet generator |
CN104734439A (en) * | 2013-12-23 | 2015-06-24 | 陈国芳 | Silicon-free steel sheet electric generator |
WO2015062815A3 (en) * | 2013-10-30 | 2016-01-28 | Robert Bosch Gmbh | Electrical machine and method of operating an electrical machine |
DE202015004118U1 (en) | 2015-06-12 | 2016-04-13 | BITS Zwickau Büromat IT-Systeme GmbH | laminated rotor |
CN106208573A (en) * | 2015-03-24 | 2016-12-07 | 财团法人工业技术研究院 | Axial air gap switched reluctance motor structure |
CN109149862A (en) * | 2018-10-09 | 2019-01-04 | 晁会岩 | A kind of driving motor |
WO2022042786A1 (en) * | 2020-08-26 | 2022-03-03 | Schaeffler Technologies AG & Co. KG | Electric machine arrangement |
WO2022042785A1 (en) * | 2020-08-26 | 2022-03-03 | Schaeffler Technologies AG & Co. KG | Electric machine arrangement |
DE102021127751A1 (en) | 2021-10-26 | 2023-04-27 | Schaeffler Technologies AG & Co. KG | Electrical axial flux machine with prestressed stator components and electrical machine arrangement with such an electrical axial flux machine |
-
2012
- 2012-07-03 DE DE201210013199 patent/DE102012013199A1/en active Pending
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103501081A (en) * | 2013-10-12 | 2014-01-08 | 山东理工大学 | Engine exhaust-gas turbine drive permanent magnet generator |
CN103501081B (en) * | 2013-10-12 | 2015-07-08 | 山东理工大学 | Engine exhaust-gas turbine drive permanent magnet generator |
WO2015062815A3 (en) * | 2013-10-30 | 2016-01-28 | Robert Bosch Gmbh | Electrical machine and method of operating an electrical machine |
CN104734439A (en) * | 2013-12-23 | 2015-06-24 | 陈国芳 | Silicon-free steel sheet electric generator |
CN106208573A (en) * | 2015-03-24 | 2016-12-07 | 财团法人工业技术研究院 | Axial air gap switched reluctance motor structure |
DE202015004118U1 (en) | 2015-06-12 | 2016-04-13 | BITS Zwickau Büromat IT-Systeme GmbH | laminated rotor |
CN109149862A (en) * | 2018-10-09 | 2019-01-04 | 晁会岩 | A kind of driving motor |
WO2022042786A1 (en) * | 2020-08-26 | 2022-03-03 | Schaeffler Technologies AG & Co. KG | Electric machine arrangement |
WO2022042785A1 (en) * | 2020-08-26 | 2022-03-03 | Schaeffler Technologies AG & Co. KG | Electric machine arrangement |
DE102021127751A1 (en) | 2021-10-26 | 2023-04-27 | Schaeffler Technologies AG & Co. KG | Electrical axial flux machine with prestressed stator components and electrical machine arrangement with such an electrical axial flux machine |
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R082 | Change of representative |
Representative=s name: GLEIM PETRI PATENT- UND RECHTSANWALTSPARTNERSC, DE Representative=s name: GLEIM PETRI OEHMKE PATENT- UND RECHTSANWALTSPA, DE |
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R082 | Change of representative |
Representative=s name: GLEIM PETRI PATENT- UND RECHTSANWALTSPARTNERSC, DE |