EP1421665A1 - Electrical drive device for a ship with elastically supported electric motor - Google Patents

Electrical drive device for a ship with elastically supported electric motor

Info

Publication number
EP1421665A1
EP1421665A1 EP02758156A EP02758156A EP1421665A1 EP 1421665 A1 EP1421665 A1 EP 1421665A1 EP 02758156 A EP02758156 A EP 02758156A EP 02758156 A EP02758156 A EP 02758156A EP 1421665 A1 EP1421665 A1 EP 1421665A1
Authority
EP
European Patent Office
Prior art keywords
rotor
drive device
stator
housing
electric motor
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Withdrawn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
EP02758156A
Other languages
German (de)
French (fr)
Inventor
Peter Hein
Christian Meyer
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
Publication of EP1421665A1 publication Critical patent/EP1421665A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/22—Transmitting power from propulsion power plant to propulsive elements with non-mechanical gearing
    • B63H23/24—Transmitting power from propulsion power plant to propulsive elements with non-mechanical gearing electric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K55/00—Dynamo-electric machines having windings operating at cryogenic temperatures
    • H02K55/02—Dynamo-electric machines having windings operating at cryogenic temperatures of the synchronous type
    • H02K55/04—Dynamo-electric machines having windings operating at cryogenic temperatures of the synchronous type with rotating field windings
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
    • B63G13/00—Other offensive or defensive arrangements on vessels; Vessels characterised thereby
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
    • B63H2005/1254—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis
    • B63H2005/1258—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis with electric power transmission to propellers, i.e. with integrated electric propeller motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
    • B63H2021/173—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor making use of superconductivity
    • 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
    • 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
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/12—Structural association with clutches, brakes, gears, pulleys or mechanical starters with auxiliary limited movement of stators, rotors or core parts, e.g. rotors axially movable for the purpose of clutching or braking
    • 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
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/50—Measures to reduce greenhouse gas emissions related to the propulsion system

Definitions

  • the invention is in the field of propulsion systems for ships and can be used in the structural design of an electric motor which consists of a stator and a rotor and is arranged in a gondola-like manner on the underside of a ship's hull, is arranged in a streamlined design and in which the Rotor is supported by a shaft mounted in the housing, to which at least one propeller is coupled.
  • the rotor is designed as a permanently excited rotor and consists of a support structure with a tubular support body and a magnetically active part.
  • the rotor is arranged on a drive shaft which carries at least one propeller and is mounted in the housing of the drive device.
  • the stator as an electrically and magnetically active part, is non-positively fitted into the housing of the drive device.
  • the electric motor is cooled by dissipating heat through the housing to the surrounding water.
  • air or an insulating oil can be circulated inside the housing (WO 97/49605).
  • the use of a special thermal bridge can be considered (DE 199 02 837 AI). Additional cooling measures can consist in the use of recoolers arranged in the shaft-like supporting part of the drive device (DE 198 26 226 AI).
  • the stator is provided with a radial was arranged in the housing in order to be able to cool the stator and rotor with a gaseous coolant supplied from the ship's hull via special cooling channels (US Pat. No. 5,403,216 A).
  • the invention has for its object to design the drive device so that it can withstand shock loads and is therefore also suitable for applications in areas where strong underwater pressure waves can occur.
  • stator is fixed to the rotor via rotary bearings and that the structural unit formed from the stator and rotor is supported elastically both on the housing and on the drive shaft.
  • the electrically and magnetically active parts of the drive motor which are provided with a large mass, form a unit which is mounted "damped" within the housing and on the drive shaft.
  • these act with a time delay and thus reduce the shock on the electrically and magnetically active parts of the motor.
  • the mechanical forces acting on the ship's hull, in particular bending moments, via the suspension of the gondola-like drive device are thereby reduced.
  • the elastic or damped arrangement of the electrically and magnetically active parts of the electric drive motor further reduces the structure-borne noise emitted by the drive device, as a result of which the acoustic location of a drive device of this type is reduced.
  • the rigid mechanical coupling between the rotor and the stator of the electric drive motor has the further advantage in motors in which the rotor is equipped with permanent magnets for the purpose of excitation that the air gap between the rotor and the stator also in the case of shock loads the drive device remains constant and can therefore be chosen to be very small.
  • the rotor consists of a tubular support body and an active part placed on the support body, which is elastically supported on the drive shaft, while the stator is mounted on the support body of the rotor and is supported elastically on the housing.
  • the bearing of the rotor on the drive shaft is expediently designed to be soft both in the axial and in the radial direction, but torque-resistant in the circumferential direction.
  • Axial bearings which are preferably designed as roller bearings.
  • plain bearings are advantageously used for the bearing of the rotor shaft, preferably those with hydrostatic oil circulation.
  • damping elements For the elastic support of the rotor on the shaft, commercially available damping elements can be used, such as are used for example for elastic couplings in a corrugated line. For such damping elements, it is essential that they are designed to be elastic in the radial and axial direction of the rotor and torque-resistant in the circumferential direction of the rotor. Damping elements of the same type as for supporting the rotor on the shaft can be used for the elastic support of the stator on the housing of the drive device.
  • a circulating air flow can also be generated, which flows around the winding heads of the stator and is recooled in the region of the support shaft of the drive device. If necessary, the bilge spaces of the drive device, i. H. the housing parts arranged at the ends of the drive shaft are used for recooling purposes.
  • FIG. 1 shows a drive device in a schematic representation in longitudinal section and FIGS. 2 and 3 a constructive embodiment for the arrangement according to FIG. 1.
  • Figure 1 shows the drive shaft 1 of an electromotive
  • Drive device 100 for a ship the drive shaft carrying a propeller 2 or 3 at each end. Only the upper half of the electric motor driving the drive shaft 1 is shown in section.
  • This electric motor consists of a rotor 4 and a stator 5, the rotor having an electrically active layer 6 in the form of permanent magnets and being arranged on a tubular support body 7.
  • the stator 5 has a multi-part support housing 8, which is fixed to the support body 7 of the rotor via rotary bearings 9.
  • the structural unit consisting of rotor 5 and stator 6 is supported on the one hand on the drive shaft 1 and on the other by the elastic damping elements 10 and 11
  • the drive shaft 1 is mounted in the housing 12 via rotary bearings 13.
  • a housing shaft 14 is assigned to the housing 12 for fastening the drive device 100 to the hull of a ship.
  • the support shaft 14 can be double-walled or be provided with vertically circumferential cooling channels 16, for example for guiding cooling air.
  • cooling air can be fed from the support shaft 14 into the interior between the support housing 8 and the support body 7, for example, at one end of the electric motor and discharged at the other end of the electric motor.
  • the cooling air could flow in the axial direction within the electric motor between the electrically active layer 6 of the rotor and the support body 7. - This could be used to cool the stator or the stator windings Stator housing 8 have flow channels that from the
  • Carrying shaft 14 are fed through cooling water.
  • the electric motor consisting of rotor 24 and stator 25 is arranged in a streamlined housing 32 which can be positioned in a gondola-like manner below a ship's hull by means of the support shaft 39.
  • the support housing 28 of the stator is fixed to the support body 27 of the rotor 24 by means of rotary bearings 29, which are designed as angular roller bearings.
  • This support body is supported elastically on the drive shaft 21 via damping elements 30.
  • the damping elements 30 are axially fixed to ring flanges 18 and 19.
  • damping elements 31 each consist of a rubber body 17 which is mechanically coupled to the support body 28 and the housing 32 via bolts 35/36.
  • the drive shaft 21 carrying the rotor is mounted in the housing 32 by means of slide bearings 33 and 34.
  • the plain bearings are sealed against the surrounding water by means of sealing devices 37/38.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

The drive device (100) is provided with an electric motor, located on the underside of a ship hull in a housing (12) arranged like a gondola. At least one propeller (2, 3) is coupled to the drive shaft (1), supporting the rotor (4) of the electric motor. In order that such a drive device may be resistant to shock loads, the stator (5) of the electric motor is fixed to the rotor (4) by means of a pivot bearing (9) and the module comprising rotor (4) and stator (5) is elastically supported both on the housing (12) and also the drive shaft (1).

Description

Beschreibungdescription
ELEKTRISCHE ANTRIEBSEINRICHTUNG FÜR EIN SCHIFF MIT ELASTISCH ABGESTÜTZTEM ELEKTROMOTORELECTRICAL DRIVE DEVICE FOR A SHIP WITH ELASTICALLY BASED ELECTRIC MOTOR
Die Erfindung liegt auf dem Gebiet der Antriebseinrichtungen für Schiffe und ist bei der konstruktiven Ausgestaltung eines Elektromotors anzuwenden, der aus einem Stator und einem Rotor besteht und in einem an der Unterseite eines Schiffrumpfes gondelartig anzuordnen, strömungsgünstig gestalteten Ge- häuse angeordnet ist und bei dem der Rotor von einer in dem Gehäuse gelagerten Welle getragen ist, an die wenigstens ein Propeller angekoppelt ist.The invention is in the field of propulsion systems for ships and can be used in the structural design of an electric motor which consists of a stator and a rotor and is arranged in a gondola-like manner on the underside of a ship's hull, is arranged in a streamlined design and in which the Rotor is supported by a shaft mounted in the housing, to which at least one propeller is coupled.
Bei einer bekannten Antriebseinrichtung dieser Art ist der Rotor als permanenterregter Rotor ausgebildet und besteht aus einer Tragkonstruktion mit rohrartigem Tragkörper und einem magnetisch aktiven Teil. Der Rotor ist auf einer wenigstens einen Propeller tragenden und im Gehäuse der Antriebseinrichtung gelagerten Antriebswelle angeordnet. Der Stator als e- lektrisch und magnetisch aktives Teil ist in das Gehäuse der Antriebseinrichtung kraftschlüssig eingepasst. Die Kühlung des Elektromotors erfolgt dabei durch Wärmeabfuhr über das Gehäuse an das umgebende Wasser. Zur Kühlung der Wickelköpfe des Stators kann im Inneren des Gehäuses Luft oder ein Iso- lieröl umgewälzt werden (WO 97/49605) . Alternativ kommt die Verwendung einer speziellen Wärmebrücke in Betracht (DE 199 02 837 AI) . Zusätzliche Kühlmaßnahmen können in der Verwendung von im schachtartigen Tragteil der Antriebseinrichtung angeordneten Rückkühlern bestehen (DE 198 26 226 AI) .In a known drive device of this type, the rotor is designed as a permanently excited rotor and consists of a support structure with a tubular support body and a magnetically active part. The rotor is arranged on a drive shaft which carries at least one propeller and is mounted in the housing of the drive device. The stator, as an electrically and magnetically active part, is non-positively fitted into the housing of the drive device. The electric motor is cooled by dissipating heat through the housing to the surrounding water. To cool the winding heads of the stator, air or an insulating oil can be circulated inside the housing (WO 97/49605). Alternatively, the use of a special thermal bridge can be considered (DE 199 02 837 AI). Additional cooling measures can consist in the use of recoolers arranged in the shaft-like supporting part of the drive device (DE 198 26 226 AI).
Bei einer anderen bekannten Antriebseinrichtung mit gondelartig angeordnetem Elektromotor ist der Stator mit radialem Ab- stand in dem Gehäuse angeordnet, um Stator und Rotor mit einem aus dem Schiffsrumpf über spezielle Kühlkanäle zugeführten gasförmigen Kühlmittel kühlen zu können (US 5,403,216 A) .In another known drive device with an electric motor arranged in a nacelle, the stator is provided with a radial was arranged in the housing in order to be able to cool the stator and rotor with a gaseous coolant supplied from the ship's hull via special cooling channels (US Pat. No. 5,403,216 A).
Ausgehend von einer Antriebseinrichtung mit den Merkmalen des Oberbegriffes des Patentanspruches 1 liegt der Erfindung die Aufgabe zugrunde, die Antriebseinrichtung so auszubilden, dass sie Schockbelastungen standhalten kann und damit auch für Anwendungen in Einsatzgebieten geeignet ist, in denen starke Unterwasser-Druckwellen auftreten können.Starting from a drive device with the features of the preamble of claim 1, the invention has for its object to design the drive device so that it can withstand shock loads and is therefore also suitable for applications in areas where strong underwater pressure waves can occur.
Zur Lösung dieser Aufgabe ist gemäß der Erfindung vorgesehen, dass der Stator über Drehlager am Rotor fixiert ist und dass sich die aus Stator und Rotor gebildete Baueinheit sowohl am Gehäuse als auch auf der Antriebswelle elastisch abstützt.To achieve this object it is provided according to the invention that the stator is fixed to the rotor via rotary bearings and that the structural unit formed from the stator and rotor is supported elastically both on the housing and on the drive shaft.
Bei einer derartigen Ausgestaltung der Antriebseinrichtung bilden die mit einer großen Masse ausgestatteten elektrisch und magnetisch aktiven Teile des Antriebsmotors eine Einheit, die innerhalb des Gehäuses sowie auf der Antriebswelle "gedämpft" gelagert ist. Bei plötzlichen Druckeinwirkungen von außen auf das Gehäuse und die Antriebswelle der Antriebseinrichtung wirken sich diese zeitlich verzögert und damit schockreduziert auf die elektrisch und magnetisch aktiven Teile des Motors aus. Die über die Aufhängung der gondelartig angeordneten Antriebseinrichtung am Schiffsrumpf angreifenden mechanischen Kräfte, insbesondere Biegemomente, werden dadurch reduziert. - Die elastische bzw. gedämpfte Anordnung der elektrisch und magnetisch aktiven Teile des elektrischen Antriebmotors bewirkt weiterhin eine Reduzierung des von der Antriebseinrichtung ausgehenden Körperschalls, wodurch die akustische Ortung eines mit einer derartigen Antriebseinrich- tung ausgestatteten Schiffes erschwert ist. - Die starre mechanische Kopplung zwischen dem Rotor und dem Stator des e- lektrischen Antriebsmotors hat bei Motoren, bei denen der Rotor für die Zwecke der Erregung mit Permanentmagneten be- stückt ist, den weiteren Vorteil, dass der Luftspalt zwischen Rotor und Stator auch bei Ξchockbeanspruchungen der Antriebseinrichtung konstant bleibt und daher sehr klein gewählt werden kann.In such a configuration of the drive device, the electrically and magnetically active parts of the drive motor, which are provided with a large mass, form a unit which is mounted "damped" within the housing and on the drive shaft. In the event of sudden external pressure on the housing and the drive shaft of the drive device, these act with a time delay and thus reduce the shock on the electrically and magnetically active parts of the motor. The mechanical forces acting on the ship's hull, in particular bending moments, via the suspension of the gondola-like drive device are thereby reduced. The elastic or damped arrangement of the electrically and magnetically active parts of the electric drive motor further reduces the structure-borne noise emitted by the drive device, as a result of which the acoustic location of a drive device of this type is reduced. equipped ship is difficult. - The rigid mechanical coupling between the rotor and the stator of the electric drive motor has the further advantage in motors in which the rotor is equipped with permanent magnets for the purpose of excitation that the air gap between the rotor and the stator also in the case of shock loads the drive device remains constant and can therefore be chosen to be very small.
In Ausgestaltung der Erfindung besteht der Rotor aus einem rohrartigen Tragkörper und einem auf den Tragkörper aufgesetzten Aktivteil, welches auf der Antriebswelle elastisch abgestützt ist, während der Stator auf dem Tragkörper des Rotors gelagert ist und sich am Gehäuse elastisch abstützt. Zweckmäßig ist dabei die Lagerung des Rotors auf der Antriebswelle sowohl in axialer als auch in radialer Richtung weich, aber in Umfangsrichtung drehmomentsteif ausgelegt.In an embodiment of the invention, the rotor consists of a tubular support body and an active part placed on the support body, which is elastically supported on the drive shaft, while the stator is mounted on the support body of the rotor and is supported elastically on the housing. The bearing of the rotor on the drive shaft is expediently designed to be soft both in the axial and in the radial direction, but torque-resistant in the circumferential direction.
Die radial starre Lagerung des Stators auf dem Tragkörper des Rotors erfolgt zweckmäßig mit handelsüblichen Radial- undThe radially rigid mounting of the stator on the support body of the rotor is advantageously carried out with commercially available radial and
Axiallagern, die bevorzugt als Wälzlager ausgebildet sind. - Für die Lagerung der Rotorwelle werden dagegen zweckmäßig Gleitlager verwendet, vorzugsweise solche mit hydrostatischem Ölumlauf .Axial bearings, which are preferably designed as roller bearings. - On the other hand, plain bearings are advantageously used for the bearing of the rotor shaft, preferably those with hydrostatic oil circulation.
Zur elastischen Abstützung des Rotors auf der Welle können handelsübliche Dämpfungselemente verwendet werden, wie sie beispielsweise für elastische Kupplungen in einem Wellstrang gebräuchlich sind. Für derartige Dämpfungselemente ist es we- sentlich, dass sie in radialer und axialer Richtung des Rotors elastisch und in Umfangsrichtung des Rotors drehmomentsteif ausgelegt sind. Für die elastische AbStützung des Stators am Gehäuse der Antriebseinrichtung können gleichartige Dämpfungselernente wie zur Abstützung des Rotors auf der Welle verwendet werden.For the elastic support of the rotor on the shaft, commercially available damping elements can be used, such as are used for example for elastic couplings in a corrugated line. For such damping elements, it is essential that they are designed to be elastic in the radial and axial direction of the rotor and torque-resistant in the circumferential direction of the rotor. Damping elements of the same type as for supporting the rotor on the shaft can be used for the elastic support of the stator on the housing of the drive device.
Da wegen der elastischen Abstützung des Stators am Gehäuse der Antriebseinrichtung zwischen dem Stator und dem Gehäuse ein Zwischenraum entsteht, kann die Kühlung des Stators nicht allein durch Wärmeabfuhr über das Gehäuse an das umgebende Wasser erfolgen. Es müssen daher zusätzliche Kühlmaßnahmen ergriffen werden. Hierzu kann mit Rückkühlern gearbeitet werden, die im Bereich der Wand des die Antriebseinrichtung mit dem Schiffsrumpf verbindenden Tragschachtes oder im Schiffsrumpf angeordnet sind, wobei ein flüssiges Kühlmittel, insbesondere Wasser, diese Rückkühler sowie entsprechende Bohrun- gen im Blechpaket des Stators bzw. in einem das Blechpaket umgebenden Kühlring durchströmt. Eine solche Kühlung kann auch den Wickelköpfen des Stators zugeordnet werden. Im übrigen kann auch eine zirkulierende Luftströmung erzeugt werden, die die Wickelköpfe des Stators umströmt und im Bereich des Tragschachtes der Antriebseinrichtung rückgekühlt wird. Gegebenenfalls können auch die Bilgenräume der Antriebseinrichtung, d. h. die an den Enden der Antriebswelle angeordneten Gehäuseteile, für Rückkühlzwecke verwendet werden.Since there is a space between the stator and the housing because of the elastic support of the stator on the housing of the drive device, the cooling of the stator cannot take place solely by dissipating heat via the housing to the surrounding water. Additional cooling measures must therefore be taken. For this purpose it is possible to work with recoolers which are arranged in the region of the wall of the support shaft connecting the drive device to the ship's hull or in the ship's hull, a liquid coolant, in particular water, these recoolers as well as corresponding bores in the laminated core of the stator or in one of them Flows through the laminated core surrounding the cooling ring. Such cooling can also be assigned to the winding heads of the stator. In addition, a circulating air flow can also be generated, which flows around the winding heads of the stator and is recooled in the region of the support shaft of the drive device. If necessary, the bilge spaces of the drive device, i. H. the housing parts arranged at the ends of the drive shaft are used for recooling purposes.
Ein Ausführungsbeispiel der neuen Antriebseinrichtung ist in den Figuren 1 bis 3 dargestellt.An embodiment of the new drive device is shown in Figures 1 to 3.
Dabei zeigtIt shows
Figur 1 eine Antriebseinrichtung in schematischer Darstellung im Längsschnitt und die Figuren 2 und 3 eine konstruktive Ausgestaltung für die Anordnung gemäß Figur 1. Figur 1 zeigt die Antriebswelle 1 einer elektromotorischen1 shows a drive device in a schematic representation in longitudinal section and FIGS. 2 and 3 a constructive embodiment for the arrangement according to FIG. 1. Figure 1 shows the drive shaft 1 of an electromotive
Antriebseinrichtung 100 für ein Schiff, wobei die Antriebswelle an jedem Ende einen Propeller 2 bzw. 3 trägt. Von dem die Antriebswelle 1 antreibenden Elektromotor ist nur die obere Hälfte im Schnitt dargestellt. Dieser Elektromotor besteht aus einem Rotor 4 und einem Stator 5, wobei der Rotor eine elektrisch aktive Schicht 6 in Form von Permanentmagneten aufweist und auf einem rohrartigen Tragkörper 7 angeordnet ist. - Der Stator 5 weist ein mehrteiliges Traggehäuse 8 auf, welches über Drehlager 9 am Tragkörper 7 des Rotors fixiert ist.Drive device 100 for a ship, the drive shaft carrying a propeller 2 or 3 at each end. Only the upper half of the electric motor driving the drive shaft 1 is shown in section. This electric motor consists of a rotor 4 and a stator 5, the rotor having an electrically active layer 6 in the form of permanent magnets and being arranged on a tubular support body 7. - The stator 5 has a multi-part support housing 8, which is fixed to the support body 7 of the rotor via rotary bearings 9.
Die aus Rotor 5 und Stator 6 bestehende Baueinheit stützt sich mittels elastischer Dämpfungselemente 10 und 11 zum ei- nen an der Antriebswelle 1 und zum anderen an einem denThe structural unit consisting of rotor 5 and stator 6 is supported on the one hand on the drive shaft 1 and on the other by the elastic damping elements 10 and 11
Elektromotor und die Antriebswelle aufnehmenden Gehäuse 12 ab. Die Antriebswelle 1 ist dabei über Drehlager 13 in dem Gehäuse 12 gelagert.Electric motor and the drive shaft receiving housing 12 from. The drive shaft 1 is mounted in the housing 12 via rotary bearings 13.
Dem Gehäuse 12 ist ein Tragschacht 14 zur Befestigung der Antriebseinrichtung 100 am Rumpf eines Schiffes zugeordnet. Der Tragschacht 14 kann doppelwandig ausgebildet oder mit vertikal umlaufenden Kühlkanälen 16 versehen sein, beispielsweise zur Führung von Kühlluft.A housing shaft 14 is assigned to the housing 12 for fastening the drive device 100 to the hull of a ship. The support shaft 14 can be double-walled or be provided with vertically circumferential cooling channels 16, for example for guiding cooling air.
Zur Kühlung des Stators 5, insbesondere der Wickelköpfe 15, kann beispielsweise an dem einen Ende des Elektromotors Kühlluft aus dem Tragschacht 14 in den Innenraum zwischen Traggehäuse 8 und Tragkörper 7 eingespeist und am anderen Ende des Elektromotors abgeführt werden. Die Kühlluft könnte innerhalb des Elektromotors zwischen der elektrisch aktiven Schicht 6 des Rotors und dem Tragkörper 7 in Achsrichtung strömen. - Zur Kühlung des Stators bzw. der Statorwicklungen könnte das Statorgehäuse 8 Strömungskanäle aufweisen, die von aus demTo cool the stator 5, in particular the winding heads 15, cooling air can be fed from the support shaft 14 into the interior between the support housing 8 and the support body 7, for example, at one end of the electric motor and discharged at the other end of the electric motor. The cooling air could flow in the axial direction within the electric motor between the electrically active layer 6 of the rotor and the support body 7. - This could be used to cool the stator or the stator windings Stator housing 8 have flow channels that from the
Tragschacht 14 zugeführtem Kühlwasser durchströmt werden.Carrying shaft 14 are fed through cooling water.
Gemäß Figur 2 und dem etwas vergrößerten Ausschnitt gemäß Fi- gur 3 ist der aus Rotor 24 und Stator 25 bestehende Elektromotor in einem strömungsgünstig gestalteten Gehäuse 32 angeordnet, welches mittels des Tragschachtes 39 gondelartig unterhalb eines Schiffsrumpfes positionierbar ist. Das Traggehäuse 28 des Stators ist über Drehlager 29, die als Schräg- Wälz-Lager ausgebildet sind, am Tragkörper 27 des Rotors 24 fixiert. Dieser Tragkörper stützt sich über Dämpfungselemente 30 elastisch an der Antriebswelle 21 ab. Die Dämpfungselemente 30 sind dabei an Ringflanschen 18 und 19 axial fixiert.According to FIG. 2 and the somewhat enlarged detail according to FIG. 3, the electric motor consisting of rotor 24 and stator 25 is arranged in a streamlined housing 32 which can be positioned in a gondola-like manner below a ship's hull by means of the support shaft 39. The support housing 28 of the stator is fixed to the support body 27 of the rotor 24 by means of rotary bearings 29, which are designed as angular roller bearings. This support body is supported elastically on the drive shaft 21 via damping elements 30. The damping elements 30 are axially fixed to ring flanges 18 and 19.
Das Traggehäuse 28 des Stators stützt sich über Dämpfungselemente 31 am Gehäuse 32 ab. Diese Dämpfungselemente bestehen jeweils aus einem Gummikörper 17, der über Bolzen 35/36 mechanisch mit dem Tragkörper 28 und dem Gehäuse 32 gekoppelt ist.The support housing 28 of the stator is supported on the housing 32 via damping elements 31. These damping elements each consist of a rubber body 17 which is mechanically coupled to the support body 28 and the housing 32 via bolts 35/36.
Die den Rotor tragende Antriebswelle 21 ist mittels Gleitlagern 33 und 34 im Gehäuse 32 gelagert. Die Gleitlager sind dabei mittels Dichteinrichtungen 37/38 gegen das umgebende Wasser abgedichtet. The drive shaft 21 carrying the rotor is mounted in the housing 32 by means of slide bearings 33 and 34. The plain bearings are sealed against the surrounding water by means of sealing devices 37/38.

Claims

Patentansprüche claims
1. Elektrische Antriebseinrichtung (100) für eine Schiff, bestehend aus einem an der Unterseite eines Schiffsrumpfes gondelartig anzuordnenden, strömungsgünstig gestalteten Gehäuse (12) , in dem ein aus Stator (5) und Rotor (4) bestehender Elektromotor angeordnet ist, wobei an die den Rotor (4) tragende Antriebswelle (1) wenigstens ein Propeller (2, 3) angekoppelt ist, d a du r c h g e k e n n z e i c h n e t , dass der Stator (5) über Drehlager (9) am Rotor (4) fixiert ist und dass sich die aus Stator (5) und Rotor (4) gebildete Baueinheit sowohl am Gehäuse (12) als auch auf der Antriebswelle (1) elastisch abstützt.1. Electrical drive device (100) for a ship, consisting of a gondola-like arrangement on the underside of a ship's hull, aerodynamically designed housing (12), in which an electric motor consisting of stator (5) and rotor (4) is arranged, with the the drive shaft (1) carrying the rotor (4) is coupled to at least one propeller (2, 3), since you are characterized in that the stator (5) is fixed to the rotor (4) via rotary bearings (9) and that the stator ( 5) and rotor (4), the structural unit resiliently supported both on the housing (12) and on the drive shaft (1).
2. Antriebseinrichtung 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 Rotor (4) aus einem rohrartigen Tragkörper (7) und einem auf den Tragkörper aufgesetzten Aktivteil (6) besteht, wel- ches auf der Antriebswelle (1) elastisch abgestützt ist, und dass der Stator (5) auf dem Tragkörper (7) des Rotors (4) gelagert ist und sich am Gehäuse (12) elastisch abstützt.2. Drive device according to claim 1, characterized in that the rotor (4) consists of a tubular support body (7) and an active part (6) placed on the support body, which is elastically supported on the drive shaft (1), and that Stator (5) is mounted on the support body (7) of the rotor (4) and is elastically supported on the housing (12).
3. Antriebseinrichtung 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 die Abstützung (6) des Rotors (4) auf der Antriebswelle (1) in axialer und radialer Richtung weich und in Umfangsrichtung drehmomentsteif ausgelegt ist.3. Drive device according to claim 1, so that the support (6) of the rotor (4) on the drive shaft (1) is designed to be soft in the axial and radial direction and torque-resistant in the circumferential direction.
4. Antriebseinrichtung nach einem der Ansprüche 1 bis 3, d a d u r c h g e k e n n z e i c h n e t , dass die Drehlager (9) als Wälzlager ausgebildet sind. 4. Drive device according to one of claims 1 to 3, characterized in that the rotary bearings (9) are designed as roller bearings.
5. Antriebseinrichtung nach einem der Ansprüche 1 bis 4, d a d u r c h g e k e n n z e i c h n e t , dass die Lager (13) für die Lagerung der Antriebswelle (1) als5. Drive device according to one of claims 1 to 4, that the bearing (13) for the bearing of the drive shaft (1) as
Gleitlager ausgebildet sind. Plain bearings are formed.
EP02758156A 2001-08-30 2002-08-23 Electrical drive device for a ship with elastically supported electric motor Withdrawn EP1421665A1 (en)

Applications Claiming Priority (3)

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DE10143713 2001-08-30
DE10143713A DE10143713B4 (en) 2001-08-30 2001-08-30 Electric drive device for a ship
PCT/DE2002/003104 WO2003026097A1 (en) 2001-08-30 2002-08-23 Electrical drive device for a ship with elastically supported electric motor

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EP (1) EP1421665A1 (en)
AR (1) AR036382A1 (en)
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DE10143713A1 (en) 2003-03-27
US20040248479A1 (en) 2004-12-09
DE10143713B4 (en) 2005-11-03
WO2003026097A1 (en) 2003-03-27

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