WO2015018568A2 - Accouplement magnétique sans contact - Google Patents

Accouplement magnétique sans contact Download PDF

Info

Publication number
WO2015018568A2
WO2015018568A2 PCT/EP2014/064035 EP2014064035W WO2015018568A2 WO 2015018568 A2 WO2015018568 A2 WO 2015018568A2 EP 2014064035 W EP2014064035 W EP 2014064035W WO 2015018568 A2 WO2015018568 A2 WO 2015018568A2
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic elements
outer shaft
magnetic
shaft
containment shell
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/EP2014/064035
Other languages
German (de)
English (en)
Other versions
WO2015018568A3 (fr
Inventor
Otfried Derschmidt
Heribert Kammerstetter
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.)
AVL List GmbH
Original Assignee
AVL List 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 AVL List GmbH filed Critical AVL List GmbH
Publication of WO2015018568A2 publication Critical patent/WO2015018568A2/fr
Publication of WO2015018568A3 publication Critical patent/WO2015018568A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
    • H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
    • H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
    • H02K49/106—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with a radial air gap
    • 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
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings

Definitions

  • the invention relates to a non-contact magnetic coupling, with a two-space spatially separating can, and an inner shaft mounted in the containment shell and an outer shaft mounted on the containment shell, which carry mutually attracting magnetic elements in opposite circumferential regions.
  • Such, also referred to as permanent magnetic synchronous coupling units transmit torque from the drive side (usually outer shaft or outer rotor) without contact by the magnetic forces on the output side (usually inner shaft or inner rotor), usually as the main function, the hermetic separation of input and output side without dynamically loaded Sealing elements is in the foreground.
  • the separation point so usually the junction of the fixed gap pot with a partition wall between the two areas, can be purely static sealed, e.g. with a flat gasket or an O-ring, which leaks at this point are virtually completely eliminated, without that for many applications annoying, excessive friction losses can occur through gaskets and the like.
  • WO201 1/137688 A1 are mounted on the containment shell, or a component firmly connected thereto, and thus centered relative to one another, which greatly improves the operation of the magnetic coupling due to lower possible radial tolerances.
  • Object of the present invention is to improve a magnetic coupling of the type mentioned so that the mutual alignment of inner shaft and outer shaft relative to the containment shell with further reduction of gaps and game can be further improved.
  • the axial offset is in the range of 5 to 15% of the axial length of the magnetic elements, which ensures an advantageous compromise between axial clamping and torque transmission.
  • the magnetic elements of the outer shaft are further away from a mounting region of the gap pot arranged as the magnetic elements of the inner shaft. The resulting axial force keeps the outer shaft on the split pot, which can be saved for such a fixation otherwise necessary components.
  • FIG. 1 section through a magnetic coupling according to the invention is shown at least in part only schematically.
  • the two areas I and II spatially separated from each other split pot 1 is here inserted into a container wall 2 shown only schematically and secured in a manner not shown and sealed (for example by means of a flat gasket, not shown, or inserted in the groove 3 O-ring or the like ).
  • the attachment takes place via a mounting portion 1 1 of the split pot 1, wherein the mounting portion 1 1 is executed in the example shown as a mounting plate, via the e.g. a screw can be done with the container wall 2.
  • the interior of the can 1 is in communication with the region I and hermetically sealed against the region II, without requiring a dynamic seal between rotating components.
  • the inner shaft 9 and the outer shaft 6 carry individual magnetic elements 10 which attract each other in circumferential areas opposite one another, for example eight of which can be provided around the circumference and extend in the longitudinal direction with alternating polarity.
  • “Alternating polarity” here means that eg on the inner shaft 9 Magnetic elements 10 are arranged with south-north orientation adjacent to a north-south-oriented magnetic element 10. At rest, the respective north and south poles of the magnetic elements 10 are opposite and the magnetic field is completely symmetrical One of the shafts deflects the magnetic field lines, with which torque can be transmitted through the air gap or the containment shell 1.
  • the containment shell 1 can be metallic, for example made of stainless steel or another suitable alloy, which allows improved stability of the bearing , but within the rotating magnetic field basically causes eddy current losses that are converted into heat. For this reason, splitters made of plastic, ceramic, glass or the like are known.
  • At least part of the magnetic elements 10 of inner shaft 9 and outer shaft 6 are offset in the axial direction against each other, said offset V is in the range of 5 to 15% of the axial length of the magnetic elements 10.
  • the resulting axial force which acts along the longitudinal center axis 12 of the can 1, allows axial clamping of the outer 6 and inner shaft 9 with respect to their storage on the can 1.
  • the magnetic elements 10 are offset on each of the shafts in each case in the direction of floating bearing relative to the opposite magnetic elements.
  • the magnetic elements 10 of inner 9 and outer shaft 6 are offset from a position in which they are positioned exactly opposite, such that the magnetic elements 10 of the inner shaft 9 are at least partially displaced in the direction of the floating bearing 8 of the inner shaft 9 or the magnetic elements 10 of the outer shaft 6 at least are partially shifted in the direction of the floating bearing 5 of the outer shaft 6.
  • This causes a slight tension of the inner and outer shaft in the fixed bearings on the split pot 1, which reduces the bearing clearance and improves the function.
  • the magnetic elements 10 of the inner shaft 9 are positioned closer to the attachment region 11 of the can 1 than the magnetic elements 10 of the outer shaft 6.
  • the magnetic elements 10 of the inner shaft 9 are thus closer to the attachment region 11 than the magnetic elements 10 of the outer shaft 6.
  • the outer shaft 6 is held on the containment shell 1 by the resulting axial force along the longitudinal central axis 12 of the containment shell 1, and no further components are required for this purpose.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Mechanical Operated Clutches (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)

Abstract

L'invention concerne un accouplement magnétique sans contact dans lequel des éléments magnétiques (10) d'un arbre intérieur (9) et d'un arbre extérieur (6) sont disposés en étant décalés l'un par rapport à l'autre au moins en partie dans une direction axiale, ce qui donne une légère déformation des deux arbres par rapport au pot d'entrefer (1) servant en plus à réaliser aussi l'étanchéité pour le montage sur paliers des deux arbres.
PCT/EP2014/064035 2013-08-08 2014-07-02 Accouplement magnétique sans contact Ceased WO2015018568A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50495/2013A AT512841B1 (de) 2013-08-08 2013-08-08 Berührungslose Magnetkupplung
ATA50495/2013 2013-08-08

Publications (2)

Publication Number Publication Date
WO2015018568A2 true WO2015018568A2 (fr) 2015-02-12
WO2015018568A3 WO2015018568A3 (fr) 2015-07-16

Family

ID=49549903

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/064035 Ceased WO2015018568A2 (fr) 2013-08-08 2014-07-02 Accouplement magnétique sans contact

Country Status (2)

Country Link
AT (1) AT512841B1 (fr)
WO (1) WO2015018568A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202022105450U1 (de) * 2022-09-28 2024-01-19 Liquitec Ag Magnetrührwerk

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1801420A2 (fr) 2005-12-23 2007-06-27 H. Wernert & Co. oHG Pompe centrifuge à accouplement magnétique
WO2011137688A1 (fr) 2010-05-06 2011-11-10 东莞宏威数码机械有限公司 Mécanisme de transmission magnétique à vide

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027472A (en) * 1958-04-11 1962-03-27 Westinghouse Electric Corp Magnetic coupling arrangement
CA1129469A (fr) * 1980-05-02 1982-08-10 Nova Scotia Research Foundation Corporation Mecanisme d'entrainement magnetique synchrone avec barriere lamifiee
DE8816042U1 (de) * 1988-06-20 1989-02-09 Knöll, Rudolf W., Dipl.-Ing., 7970 Leutkirch Magnetkupplung mit Wälzlagern
US5324540A (en) * 1992-08-17 1994-06-28 Tokyo Electron Limited System and method for supporting and rotating substrates in a process chamber
DE10155763A1 (de) * 2001-11-14 2003-05-22 Rieter Ag Maschf Changiereinrichtung mit Magnetkupplung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1801420A2 (fr) 2005-12-23 2007-06-27 H. Wernert & Co. oHG Pompe centrifuge à accouplement magnétique
WO2011137688A1 (fr) 2010-05-06 2011-11-10 东莞宏威数码机械有限公司 Mécanisme de transmission magnétique à vide

Also Published As

Publication number Publication date
WO2015018568A3 (fr) 2015-07-16
AT512841A1 (de) 2013-11-15
AT512841B1 (de) 2014-05-15

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