EP1005715A1 - Dispositif de chauffage - Google Patents

Dispositif de chauffage

Info

Publication number
EP1005715A1
EP1005715A1 EP98945199A EP98945199A EP1005715A1 EP 1005715 A1 EP1005715 A1 EP 1005715A1 EP 98945199 A EP98945199 A EP 98945199A EP 98945199 A EP98945199 A EP 98945199A EP 1005715 A1 EP1005715 A1 EP 1005715A1
Authority
EP
European Patent Office
Prior art keywords
heating device
permanent magnets
occupied
housing
rotor
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Withdrawn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
EP98945199A
Other languages
German (de)
English (en)
Inventor
Hans Jürgen BAUER
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.)
Europat Ltd
Original Assignee
Europat Ltd
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
Priority claimed from DE19820370A external-priority patent/DE19820370A1/de
Application filed by Europat Ltd filed Critical Europat Ltd
Publication of EP1005715A1 publication Critical patent/EP1005715A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • H05B6/109—Induction heating apparatus, other than furnaces, for specific applications using a susceptor using magnets rotating with respect to a susceptor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24V—COLLECTION, PRODUCTION OR USE OF HEAT NOT OTHERWISE PROVIDED FOR
    • F24V99/00—Subject matter not provided for in other main groups of this subclass
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
    • H02K49/02—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type
    • H02K49/04—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type
    • H02K49/046—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type with an axial airgap
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • H05B6/108—Induction heating apparatus, other than furnaces, for specific applications using a susceptor for heating a fluid
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Definitions

  • the invention relates to a heating device.
  • a heating device is known from EP 0 313 764 A2 which has a part which is connected to a rotor shaft which is rotatably mounted in a housing and is fitted with permanent magnets. Individual soft iron cores are arranged in the housing. The number of permanent magnets differs from the number of soft iron cores. A soft medium flows around the soft iron cores in the interior of the housing.
  • an eddy current brake which is a non-contact electrical brake which releases mechanical energy through eddy currents in a metallic mass
  • the eddy current brake is a direct current machine of the inner pole type.
  • a fixed inner ring carries a coil through which direct current flows, which generates a homopolar magnetic field.
  • An armature ring made of electrically conductive material forms the active part of a rotor relative to a stand Anchor ring induces eddy currents, which together with the stator field produce a braking torque, the size of which depends on the excitation current and the slip speed.
  • Eddy current brakes of this type are used, inter alia, in trucks as an additional brake on the drive shaft.
  • the invention has for its object to provide a heating device which has a high efficiency and allows a compact design.
  • the permanent magnets regularly attached to the rotor induce eddy currents in the closed ring, which is usually arranged as a stator in the interior of the housing and is surrounded by heating media.
  • the amount of mechanical energy converted into heat results for a given heating device on the one hand from the relative speed of the rotor and stator against each other, that is from the speed of the rotor, and on the other hand from the size of the gap between the permanent magnet and the part made of electrically conductive material, for which it is particularly advantageous if this gap can be changed.
  • 1 shows a first embodiment of a heating device in front view
  • 2 shows a cross section through the heating device according to section line II-II in FIG. 1
  • FIG. 3 shows a second embodiment of a heating device in front view
  • FIG. 4 shows a partial cross section through the heating device according to section line IV-IV in FIG. 3,
  • FIG. 5 shows a third embodiment of a heating device in front view
  • FIG. 6 shows a cross section through the heating device according to the section line VI-VI in FIG. 5,
  • Fig. 7 shows a rotor in plan view
  • FIG. 8 shows a cross section through the rotor according to section line VIII-VIII in FIG. 7.
  • the heating device shown in FIGS. 1 and 2 has an essentially lenticular cylindrical housing 1, one end of which is closed with an annular disk-shaped cover 2 which is fastened to the housing 1 by means of screws 3.
  • the housing 1 also has feet 4 which are provided with fastening openings 5.
  • the ring-cylindrical housing 1 has a bearing tunnel 7 concentric with its axis 6, in which a rotor shaft 8 is freely rotatable relative to the housing 1 by means of two bearings 9, 10. At the end of the shaft 8 which is adjacent to the cover 2, a pulley 11 is fixed thereon. Stigt, via which the shaft 8 is driven by a drive belt 12 by a motor, not shown.
  • the housing 1 is closed on its end face opposite the cover 2 by means of an end wall 13.
  • a disk-shaped rotor 14 is attached to the end of the shaft 8 adjacent to this end wall 13. It is fixed to a sliding bushing 15 by means of screws 16 in the direction of the axis 6 and in the direction of rotation.
  • the bushing 15 is in turn connected to the shaft 8 in a rotationally fixed but displaceable manner in the direction of the axis 6 by means of a sliding connection 17.
  • the bushing 15 has on its inside a groove 18 which runs parallel to the axis 6 and is open towards the shaft 8 and into which a ball 20 located in a bore 19 in the shaft 8 engages.
  • an actuating lever 21 is provided, one end of which is pivotably mounted in a bearing 22 attached to the housing 1 and projecting arm-like above the rotor 14.
  • a driver pin 23 is formed on the lever 21 and engages in an outer groove 24 of the bush 15.
  • the rotor 14 is equipped on its side facing the end wall 13 with permanent magnets 25 which are arranged in correspondingly adapted bores 26 of the rotor 14. They are arranged at the same radial distance from the axis 6 and at the same angular distances from one another. about the circumference is alternately facing the north poles N and the south poles S of the end wall 13. Accordingly, the south poles are S and
  • North poles N alternately facing away from the end wall 13, i.e. the magnetization direction of the magnets 25 runs parallel to the axis 6.
  • an annularly closed stator 27 Arranged in the housing 1 is an annularly closed stator 27, which is arranged concentrically to the axis 6 and is designed as a cylindrical ring in the embodiment according to FIGS. 1 and 2. It is arranged with an end face 28 in a ring cylinder recess 29 in the end wall 13 and fastened to the cover 2 by means of a holder 30, ie it is inserted into the interior 31 of the housing 1 and in this when the cover 2 is mounted on the housing 1 held.
  • the holder 30 has openings 30 ', as shown in FIG. 2.
  • soft iron cores 32 which have the shape of cylindrical disks, are fitted in corresponding recesses 33 in the stator 27.
  • the soft iron cores 32 are flush with the end face 28 of the stator 27. These soft iron cores 32 are arranged at the same radial distance as the magnets 25 from the axis 6; they are also arranged at the same angular distances from one another, but with a number that preferably differs by 1 from the number of magnets 25. It follows from this that the angular spacings of the soft iron cores 32 from one another are different from those of the permanent magnets 25.
  • the mean radial spacing a of the stator 27 is equal to that of the cores 32 and the magnets 25. As can be seen in FIG.
  • the gap 34 between the magnets 25 and the end face 28 of the stator 27 has a width b which is very small in the extended position of the rotor 14 in FIG. 2 and is preferably less than 1 mm.
  • the interior 31 of the housing 1 is connected to a heat transfer inlet connection 35 and a heat transfer outlet connection 36, through which a heat transfer medium, usually water, is supplied to the interior 31, which flows around the stator 27 while passing through the openings 30 ' and flows out through the drain port 36 again.
  • the housing 1 consists of a non-magnetic and electrically non-conductive material, which should also have the lowest possible thermal conductivity. So plastics, glass or ceramics are particularly suitable.
  • the rotor consists of a non-magnetic, electrically non-conductive, i.e. a non-metallic material.
  • the mechanical energy converted into thermal energy in this way depends on the speed of the rotor 14 relative to the stator 27 and on the width b of the gap 34.
  • the lever 21 can thus be used to set the width b of the gap 34 by adjusting the width b of the gap 34 accordingly adjust mechanical energy.
  • the arrangement of the soft iron cores 32 and their arrangement offset from the permanent magnets 25 has the purpose of reducing the torque.
  • the soft iron cores 32 are not absolutely necessary to achieve the eddy current effect.
  • the heating device shown in FIGS. 3 and 4 with the embodiment according to FIGS. 1 and 2 has identical parts, identical reference numerals are used, as far as functionally identical, but structurally but slightly different parts are used, the same reference numerals with a superscript Dash used. In no case does it need to be described again.
  • the heating device shown in FIGS. 3 and 4 has a housing 1 ', which consists of two front-side housing halves 41, which are basically the same, between which a housing jacket ring 42 is arranged.
  • the housing 1 ' is held together by tie bolts 43.
  • a motor shaft 8' is freely rotatably supported by means of bearings 9 ', 10'.
  • the bearing 9 'facing one end of the rotor shaft 8' is supported there in a bearing bush 44, which in turn is supported in the bearing tunnel 7 'of the housing 1' and is held axially by means of screws 45.
  • a pulley 11' is rotatably fixed, by means of which the rotor shaft 8 'can be driven.
  • annular disk-shaped rotor 14' Arranged on the rotor shaft 8 ' is an annular disk-shaped rotor 14', which is formed from two identical rotor annular disks 14'a, between which a thin plate 14'b made of ferromagnetic material, ie steel, iron or the like, is arranged.
  • Continuous and aligned bores 26 ' are formed in the annular disks 14' a, in which permanent magnets 25 ' are arranged, each lying in pairs on the plate 14'b as shown in FIG. 4 and pulled against it by the magnetic forces become. They are therefore each in pairs with a north pole N and a south pole S on this plate 14'b. As a result, they are held firmly in the bores 26 '.
  • a stator 27' is arranged in each housing half 41, namely on both sides of the disc-shaped rotor 14 ', which seals on the one hand against the housing jacket ring 42 and on the other hand against the bearing tunnel 7' limiting tubular housing sections 46 by means of seals 47, 48 are, so that an interior 31 'is formed in each housing half 41, through which a heat transfer medium, for example water, can flow, which is supplied to the respective housing half 41 through an inlet connection 35' and which is discharged through an outlet connection 36 '.
  • the stators 27 ' have a semi-cylindrical shape in cross-section, as can be seen in FIG. seen from the rotor 14 ', their cross-section tapers.
  • no soft iron cores 32 are arranged in the end faces 28 ′ of the stators 27 ′ facing the rotor 14 ′.
  • the width b 'of the respective gap 34' between the magnets 25 'and the facing end face 28' can be made very small, i.e. there is only a very small air gap 34 '.
  • the conversion of mechanical energy into thermal energy can only be changed by changing the speed of the rotor 14 '.
  • the housing 1 ′′ also has a cover 2 ′′.
  • a rotor shaft 8 ′′ with bearings 9 ′′, 10 ′′ is freely rotatable, at one end a pulley 11 "is attached in a rotationally fixed manner.
  • an annular disk-shaped rotor 14" is attached in a rotationally fixed but axially displaceable manner on the shaft 8 "via a sliding bush 15".
  • an adjusting ring 49 is rotatably supported via a bearing 50, on which an only indicated control lever 21" for displacing the sliding bush 15 "together with the rotor disk 14" in the direction of the axis 6 "
  • the rotor 14 "with permanent magnets 25 is otherwise designed as in the exemplary embodiment according to FIGS. 1 and 2.
  • the stator 27 differs only from that already described with reference to FIGS. 1 and 2 in that it tapers in a trapezoidal shape when viewed in the cross section from the rotor 14" identical training, the same reference numerals are used without a new description.
  • a rotor 14 '" is shown as it is inserted on the one hand in the second embodiment according to FIGS. 3 and 4 but also in the first and third embodiment according to FIGS. 1 and 2 or 5 and 6
  • the rotor 14 '' has recesses 55, 56 in the form of annular segments on both sides, the recesses 55 which extend over a somewhat larger circumferential angle being used to hold permanent magnets 25 '', which are correspondingly in the form of annular segments are adapted and adapted to the recess 55.
  • annular segment-shaped plates 57 made of soft iron are fitted in the recesses 56, which extend over a somewhat smaller circumferential angle.
  • the recesses 55 and 56 are formed on both sides of the disk-shaped rotor 14 '".
  • a thin plate or disk 58 is formed in the center plane of the rotor 14 '", against which the magnets 25'" each bear in pairs with the north pole N and the south pole S, whereby they hold firmly in the recesses 55.
  • the soft iron plates 57 must be fastened in the corresponding recesses 56 by means of adhesive or the like.
  • the rotor 14 ' including the disk 58 and its hub 59, is made of a suitable plastic. Between each of the adjacent recesses 55 and 56, narrow web-like intermediate walls 60 are formed which run radially to the axis 6"".
  • the rotor 14 '' shown in FIGS. 7 and 8 can - with a slight modification - also be used as a rotor in heating devices, as shown in principle in FIGS. 1 and 2 on the one hand and 5 and 6 on the other hand.
  • the recesses 55, 56 with magnets 25 '"or soft iron plates 57 are only on one, the stator arranged facing side, while on the other side the web-like partitions 60 are omitted and there is a continuous soft iron ring 61 over which the magnetic flux is guided.
  • This goal can also be achieved if the disk 98 integrated in the rotor 14 ′′ consists of a ferromagnetic material, as is shown for the embodiment according to FIGS. 3 and 4. This is indicated in the lower left of FIG. 8 experience has shown, the soft iron cores 32 in the stator can be omitted.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)

Abstract

Le dispositif de chauffage proposé présente une enceinte (1) avec un confinement intérieur (31). Il présente également deux éléments tournant l'un par rapport à l'autre autour d'un même axe, dont l'un est pourvu d'aimants constants (25) tandis que l'autre est constitué d'un matériau électroconductible. L'un desdits éléments est solidaire en rotation avec un arbre rotor placé dans l'enceinte (1). L'élément composé du matériau électroconductible est installé dans le confinement intérieur (31) de l'enceinte (1), où il peut être parcouru par un vecteur de chaleur.
EP98945199A 1997-08-21 1998-08-10 Dispositif de chauffage Withdrawn EP1005715A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19736269 1997-08-21
DE19736269 1997-08-21
DE19820370 1998-05-07
DE19820370A DE19820370A1 (de) 1997-08-21 1998-05-07 Heiz-Vorrichtung
PCT/EP1998/005060 WO1999010971A1 (fr) 1997-08-21 1998-08-10 Dispositif de chauffage

Publications (1)

Publication Number Publication Date
EP1005715A1 true EP1005715A1 (fr) 2000-06-07

Family

ID=26039332

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98945199A Withdrawn EP1005715A1 (fr) 1997-08-21 1998-08-10 Dispositif de chauffage

Country Status (2)

Country Link
EP (1) EP1005715A1 (fr)
WO (1) WO1999010971A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19860149A1 (de) 1998-12-24 2000-06-29 Rota System Ag Heiz-Vorrichtung
DE102009022916B4 (de) * 2009-05-27 2011-05-19 Dst Dauermagnet-System Technik Gmbh Magnetkupplung sowie Spalttopf für eine Magnetkupplung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59217589A (ja) * 1983-05-26 1984-12-07 株式会社宮野鉄工所 緩降機
GB8514967D0 (en) * 1985-06-13 1985-07-17 Froude Consine Ltd Rotary electrical machines
GB2207739A (en) * 1987-03-10 1989-02-08 Dr Mohammad O A Othman Wind-driven eddy current water heater
DE3729298A1 (de) * 1987-09-02 1989-03-23 Pran Magnettechnik Europ Gmbh Vorrichtung zur energieumwandlung
US5012060A (en) * 1989-09-11 1991-04-30 Gerard Frank J Permanent magnet thermal generator
US5051638A (en) * 1989-12-19 1991-09-24 Nathan Pyles Magnetically variable air resistance wheel for exercise devices
DE4429386A1 (de) * 1994-08-15 1996-02-22 Bernd Pfeiffer Wirbelstromheizung mit Windenergie
WO1996029844A1 (fr) * 1995-03-17 1996-09-26 Enviro Ec Ag Dispositif de chauffage permettant de rechauffer un milieu solide ou liquide

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9910971A1 *

Also Published As

Publication number Publication date
WO1999010971A1 (fr) 1999-03-04

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