EP0067786A2 - Appareil pour le chauffage de la paroi cylindrique d'un cylindre rotatif d'une machine à papier - Google Patents

Appareil pour le chauffage de la paroi cylindrique d'un cylindre rotatif d'une machine à papier Download PDF

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Publication number
EP0067786A2
EP0067786A2 EP82630061A EP82630061A EP0067786A2 EP 0067786 A2 EP0067786 A2 EP 0067786A2 EP 82630061 A EP82630061 A EP 82630061A EP 82630061 A EP82630061 A EP 82630061A EP 0067786 A2 EP0067786 A2 EP 0067786A2
Authority
EP
European Patent Office
Prior art keywords
cylinder
fact
magnetic flux
flux generator
generator device
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Withdrawn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
EP82630061A
Other languages
German (de)
English (en)
Other versions
EP0067786A3 (fr
Inventor
Udino Stedile
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.)
Beloit Corp
Original Assignee
Beloit Corp
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 Beloit Corp filed Critical Beloit Corp
Publication of EP0067786A2 publication Critical patent/EP0067786A2/fr
Publication of EP0067786A3 publication Critical patent/EP0067786A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/14—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning
    • F26B13/18—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning heated or cooled, e.g. from inside, the material being dried on the outside surface by conduction
    • F26B13/183—Arrangements for heating, cooling, condensate removal
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/022—Heating the cylinders
    • D21F5/024—Heating the cylinders using electrical means

Definitions

  • the present invention relates to apparatus for heating the cylindrical wall of a rotary cylinder of a paper making machine, in particular a sheet paper drying cylinder of a machine of this type.
  • the apparatus must include a boiler for generating the steam, and since it is supplied to the interior cavity of the cylinder, this latter constitutes in effect a pressure vessel which must be perfectly sealed aid must have a mechanical strength sufficient to resist the pressure of the said steam.
  • sucker means which include numerous parts and members such as tubing, pumps and sealing elements; and then, normally on the surface of the inner wall of the cylinder, there must be formed annular grooves operable to collect the condensation.
  • the object of the present invention is that of providing apparatus for heating the cylindrical wall of a rotary cylinder for a paper making machine, in particular a drying cylinder for the sheet paper of such a machine, which will be free from the above mentioned disadvantages.
  • the apparatus of the invention is characterised by the fact that it comprises at least one magnetic flux generator device, means for supporting this device at a predetermined distance from the said cylinder, and drive means operable to generate movement at a predetermined relative angular speed between the cylinder and the said magnetic flux generator device, the said cylindrical side wall of the said cylinder being made of a metal material and the said predetermined distance being chosen in such a way that the magnetic flux generated by the said device intersects at least part of the said side wall.
  • the apparatus of the invention is intended to heat the cylindrical side wall of a rotary cylinder 1 which may form part of a paper making machine; in particular this cylinder can be a sheet drying cylinder and the said side wall is made of a metal material.
  • the apparatus of the invention includes means (not illustrated) for driving the cylinder 1 to rotate, comprising, for example, an electric motor. Conveniently, for purposes which will be indicated, this motor is a motor the speed of which is continuously adjustable.
  • the apparatus includes magnetic flux generator means, indicated 2, which can simply comprise permanent magnets 3 as shown in the embodiment of Figure 1, or electro magnets 4 as shown, on the other hand, in Figure 2 , the windings of which are connected, by means of conductors 5, to a suitable source of dc or ac electrical energy.
  • support means operable to support the flux generator means and to hold them at a predetermined distance from the cylinder 1; these can comprise, for example, one or more arms 7, axially movable on guides 8 of the base (not illustrated) of the apparatus.
  • the support means 6 are preferably provided with adjustment means for the purpose of being able to arrange the magnets 3 (or the electro magnets 4) in a predetermined position with respect to the cylinder 1, this position being chosen in such a way that the magnetic flux generated by these magnets, (or electro magnets) intersects at least part of the side wall of the cylinder 1.
  • FIGS. 6 and 7 the structure of the support ; 6 is shown in more detail.
  • Two rows of electro magnets 4 are supported by a beam 12 the ends of which are fixed to triangular plates 13; these are pivoted, by means of a pair of link rods 14, to plates 15 of a bracket 16 fixed to the base of the apparatus in such a way as to form two parallelogram linkages operable to allow substantially parallel displacements of the beam 12 normal to the surface of the cylinder.
  • the beam 12 is connected, by means of cylindrical pivots 17, to a bar 18 forming part of a rack and pinion mechanism connected to an operating shaft 20 to which there is fixed an operating wheel 21 and/or a drive motor 21a.
  • the lower ends of the said rod are pivoted, by means of further cylindrical pivots 22, to the base of the machine.
  • the heating of the wall of the cylinder 1 takes place in the following way.
  • the electric motor makes the cylinder 1 rotate at a predetermined speed and the magnets 3 (or the electro magnets 4) are carried, by acting on their support means 6, closely adjacent to the said wall at a distance such as to make the magnetic flux generated by the magnets intersect part of the said wall. It is apparent that in order to generate this magnetic flux, in the case of the electro magnets 4 ( Figure 2) ac or dc electrical energy is supplied to the associated windings.
  • This characteristic can be particularly advantageous in a drying cylinder of a paper making machine in which, for correct drying of the sheet, heating energy proportional to the tangential velocity of the sheet on the cylinder is required; in fact, if a certain magnetic flux sufficient to cause an effective heating at a predetermined speed of rotation of the cylinder is established the system thus adjusted is also self regulating since by increasing the speed of the cylinder the energy required for drying is also increased.
  • the adjustment of the quantity of heat transmitted to the cylinder wall can also be effected by acting on the distance of the magnets 3 from the wall itself or by varying the current in the dc electro magnets, rather than on the speed, thus generating in this way a different magnetic flux ó and therefore obtaining a dif- ferent value of the flux variation .
  • the electro magnets 4 are arranged in the same diametral plane of the cylinder 1 . and on opposite sides thereof; in this way the resultant of the forces of attraction generated by the electro magnets on the side wall of the cylinder, and which act on the shaft of the cylinder itself, is nil, with the advantage that the shaft bearings carry only the weight of the cylinder; it is evident that more than two electro magnets can be arranged peripherally around the cylinder, angularly displaced by the same amount, in such a way as to obtain the above mentioned effect, that is a zero resultant on the cylinder shaft.
  • the apparatus of the invention can include means for distributing electrical current to the electro magnets 4 and these can have the arrangement as shown in Figure 4 such as to be uniformily spaced from one another around the, periphery of the cylinder 1 so that these electro magnets constitute the stator of an electric motor the rotor ring of which is formed by the cylindrical side wall of the cylinder itself; in this case such wall is made of a ferromagnetic material.
  • the electro-magnets 4 generate not only the magnetic flux which allows the heating of the side wall of the cylinder 1, but also a magnetic flux capable of driving the cylinder itself to rotate.
  • the apparatus must be provided with known means with which electric motors are provided, which function on the basis of the indicated principal.
  • the apparatus of the invention can also be formed according to the diagram of Figure 5, that is to say by arranging the electro magnets 4 (or the magnets 3) within the cylinder 1; in this case these will be supported by suitable support means 30 which also allow radial displacement of each of these with respect to the cylindrical wall 1. ;
  • the support means 30 include a hollow drum 31 the ends of which are rigidly connected to side walls 33 of the base of the apparatus.
  • the cylinder 1, coaxial with the drum 31, has a bottom wall 32 and is supported by the base itself via inter- . posed rolling element bearings 32a.
  • the electro magnets 4 are carried by beams 34 ( Figure 8) each of which is connected, by means of pivoted link rods ( Figure 9) to radial plates 36 in turn carried by the drum 31.
  • the radial movement of the beams 34 is controlled by mechanical jacks 37 pivotally connected both with the beams and with the drum 31 and driven by electric motors 38 via a suitable transmission including shafts 39.
  • the apparatus of the invention is constructionally very simple; it is not necessary to provide a steam generator for its operation, and the cylinder does not have to be provided with sealed internal cavities, nor must it have a high mechanical strength to resist the steam pressure.
  • the apparatus can include control means provided for effecting in an entirely automatic manner the distribution of the magnetic flux in the above described way.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Paper (AREA)
  • Rolls And Other Rotary Bodies (AREA)
EP82630061A 1981-06-16 1982-06-04 Appareil pour le chauffage de la paroi cylindrique d'un cylindre rotatif d'une machine à papier Withdrawn EP0067786A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6782781 1981-06-16
IT67827/81A IT1144234B (it) 1981-06-16 1981-06-16 Apparecchiatura per il riscaldamento della parete cilindrica di un cilindro rotante di una macchina per la fabbricazione della carta

Publications (2)

Publication Number Publication Date
EP0067786A2 true EP0067786A2 (fr) 1982-12-22
EP0067786A3 EP0067786A3 (fr) 1984-05-30

Family

ID=11305586

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82630061A Withdrawn EP0067786A3 (fr) 1981-06-16 1982-06-04 Appareil pour le chauffage de la paroi cylindrique d'un cylindre rotatif d'une machine à papier

Country Status (10)

Country Link
EP (1) EP0067786A3 (fr)
JP (1) JPS584892A (fr)
KR (1) KR840000711A (fr)
AR (1) AR228096A1 (fr)
AU (1) AU8490282A (fr)
BR (1) BR8203579A (fr)
ES (1) ES513084A0 (fr)
FI (1) FI821838A (fr)
IN (1) IN156200B (fr)
IT (1) IT1144234B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4675487A (en) * 1983-10-03 1987-06-23 Valmet Oy Apparatus and method for electromagnetic heating of a roll
EP0277905A2 (fr) * 1987-02-03 1988-08-10 Beloit Corporation Méthode de chauffage pour le chauffage d'un rouleau de calandre
WO1997045686A1 (fr) * 1996-05-29 1997-12-04 Railfix N.V. Secheur en continu a aimants permanents
WO2001094868A1 (fr) * 2000-06-06 2001-12-13 Sgm Gantry S.P.A. Sechoir continu avec aimants permanents a profil de temperature transversal reglable
EP4286582A1 (fr) 2022-06-03 2023-12-06 Toscotec S.p.a. Cylindre yankee pour la production de papier

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6175897A (ja) * 1984-09-21 1986-04-18 株式会社東芝 抄紙機のドライヤ装置
JPH07111037B2 (ja) * 1987-01-29 1995-11-29 三菱重工業株式会社 乾燥装置
JPH0826519B2 (ja) * 1987-03-24 1996-03-13 三菱重工業株式会社 ドライヤ

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE489300C (de) * 1930-01-15 Wilhelm Schoetteldreier Einrichtung zum Erwaermen von Walzen, insbesondere Blechwalzen
US2761941A (en) * 1953-06-01 1956-09-04 Ardichvili Georges Roller temperature modifying apparatus
GB949484A (en) * 1960-06-25 1964-02-12 Escher Wyss Gmbh Improvements in or relating to rotatable heating cylinders for paper webs or the like
FR2124802A5 (fr) * 1971-02-04 1972-09-22 United Engineer Foundry
DE2204816A1 (de) * 1972-02-02 1973-08-09 Siemens Ag Regelbare anordnung zum erwaermen umlaufender gutkoerper
FR2461426A1 (fr) * 1979-07-09 1981-01-30 Cem Comp Electro Mec Dispositif de chauffage par induction de produits longs et minces en defilement continu
GB2083729A (en) * 1980-09-05 1982-03-24 Kleinewefers Gmbh Roll such as a calender roll with electromagnetic heating

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE489300C (de) * 1930-01-15 Wilhelm Schoetteldreier Einrichtung zum Erwaermen von Walzen, insbesondere Blechwalzen
US2761941A (en) * 1953-06-01 1956-09-04 Ardichvili Georges Roller temperature modifying apparatus
GB949484A (en) * 1960-06-25 1964-02-12 Escher Wyss Gmbh Improvements in or relating to rotatable heating cylinders for paper webs or the like
FR2124802A5 (fr) * 1971-02-04 1972-09-22 United Engineer Foundry
DE2204816A1 (de) * 1972-02-02 1973-08-09 Siemens Ag Regelbare anordnung zum erwaermen umlaufender gutkoerper
FR2461426A1 (fr) * 1979-07-09 1981-01-30 Cem Comp Electro Mec Dispositif de chauffage par induction de produits longs et minces en defilement continu
GB2083729A (en) * 1980-09-05 1982-03-24 Kleinewefers Gmbh Roll such as a calender roll with electromagnetic heating

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4675487A (en) * 1983-10-03 1987-06-23 Valmet Oy Apparatus and method for electromagnetic heating of a roll
EP0277905A2 (fr) * 1987-02-03 1988-08-10 Beloit Corporation Méthode de chauffage pour le chauffage d'un rouleau de calandre
EP0277905A3 (en) * 1987-02-03 1989-02-22 Beloit Corporation Heating apparatus for heating a calender roll
WO1997045686A1 (fr) * 1996-05-29 1997-12-04 Railfix N.V. Secheur en continu a aimants permanents
WO2001094868A1 (fr) * 2000-06-06 2001-12-13 Sgm Gantry S.P.A. Sechoir continu avec aimants permanents a profil de temperature transversal reglable
EP4286582A1 (fr) 2022-06-03 2023-12-06 Toscotec S.p.a. Cylindre yankee pour la production de papier

Also Published As

Publication number Publication date
JPS584892A (ja) 1983-01-12
BR8203579A (pt) 1983-06-14
IN156200B (fr) 1985-06-01
EP0067786A3 (fr) 1984-05-30
ES8306431A1 (es) 1983-06-01
FI821838A (fi) 1982-12-17
IT8167827A0 (it) 1981-06-16
FI821838A0 (fi) 1982-05-24
ES513084A0 (es) 1983-06-01
KR840000711A (ko) 1984-02-27
AR228096A1 (es) 1983-01-14
IT1144234B (it) 1986-10-29
AU8490282A (en) 1982-12-23

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Effective date: 19860304

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Inventor name: STEDILE, UDINO