WO2020053130A1 - Élément structural d'une machine pour la production et/ou le traitement d'une bande de matière fibreuse - Google Patents

Élément structural d'une machine pour la production et/ou le traitement d'une bande de matière fibreuse Download PDF

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Publication number
WO2020053130A1
WO2020053130A1 PCT/EP2019/073955 EP2019073955W WO2020053130A1 WO 2020053130 A1 WO2020053130 A1 WO 2020053130A1 EP 2019073955 W EP2019073955 W EP 2019073955W WO 2020053130 A1 WO2020053130 A1 WO 2020053130A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
component according
electrically non
conductive fluid
machine
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/EP2019/073955
Other languages
German (de)
English (en)
Inventor
Thomas Jaschinski
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.)
Voith Patent GmbH
Original Assignee
Voith Patent 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 Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of WO2020053130A1 publication Critical patent/WO2020053130A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G5/00—Safety devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/20—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/56—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances gases

Definitions

  • the present invention relates to a component of a machine for producing and / or treating a fibrous web, in particular a paper, cardboard or tissue paper web, a drive, a dewatering device and a machine comprising such a component and its use, in detail according to the independent claims.
  • a component of a machine for producing and / or treating a fibrous web in particular a paper, cardboard or tissue paper web
  • a drive, a dewatering device and a machine comprising such a component and its use, in detail according to the independent claims.
  • numerous components are exposed to fluids, such as water. Particularly when such components are energized, undesired power conduction can occur if the water gets into the housing of such a component. These leaks can then go hand in hand with destruction of the component or endangering people.
  • penetrating water has a corrosive effect on e.g. metal-containing elements of such a component.
  • the object of the invention is to avoid the disadvantages of the prior art. Rather, a component of a machine mentioned at the outset is to be specified, by means of which the destruction of current-carrying and fluid- and water-contacting components as a result of short-circuits and the resulting electrical accidents are avoided. At the same time, corrosion due to water entering the component should be minimized.
  • the task is solved by the independent claims. Particularly advantageous and preferred embodiments are shown in the dependent claims.
  • the inventor has recognized that short circuits, power accidents and corrosion on components in contact with or around which water is flushed can be considerably reduced if the housing of the component is at least partially compatible with the surroundings electrically non-conductive fluid is filled. A current-carrying device arranged in the housing is thus electrically insulated from the housing.
  • the term fluid basically means both a gas and a liquid, preferably only one liquid.
  • this definition means a partial or complete filling thereof.
  • Fluids which have an electrical conductivity of less than 10 6 S-crrr 1 , preferably less than 10 -8 S-crrr 1 and preferably a specific resistance of more than 10 8, can preferably be used as electrically non-conductive fluids available on the market Q cm. This corresponds to the definition according to the invention of an electrically non-conductive fluid. These properties are fulfilled, for example, by pure water, dielectrics or corresponding liquids, including fluorine, such as perfluorinated liquids.
  • the fluid is selected such that it is inert with respect to water.
  • it can also be selected such that it does not form a mixture with water, but rather that the water and the electrically non-conductive fluid form two separate phases with one another.
  • the non-conductive fluid has a density that is higher than water or the non-conductive fluid is highly viscous in the manner of a gel, there are still further advantages in use. This is because the electrically non-conductive fluid can then be separated comparatively easily from water that nevertheless accumulates within the housing (for example in the form of condensate).
  • the housing of the component according to the invention can be designed such that it has an inlet for supplying the electrically non-conductive fluid to the housing and an outlet for removing the electrically non-conductive fluid from the housing, the inlet and outlet preferably being designed separately from one another. Then a circuit of the fluid can be realized through the housing.
  • the upper part is designed or being movable relative to the lower part, then this means a relative linear movement (axial movement), a pivoting movement (rotary movement) or a superimposition of both of the aforementioned movements.
  • the upper part can be moved away from the lower part or towards it along a perpendicular to the longitudinal axis of the lower part. So that the upper part is adjustable in height compared to the lower part.
  • the upper part can be pivoted about an axis of rotation which runs parallel to the longitudinal axis of the lower part. This axis of rotation can thus run essentially parallel to the plane which is spanned by the screen or by the fibrous web when the drainage strip is covered.
  • the location of this axis of rotation can also be non-stationary, ie the axis of rotation can pivot itself due to the upper part.
  • the corresponding swiveling movement can ensure that the front edge of the upper part remains in the sieve plane.
  • the angle that describes the amount of rotation is called the angle of inclination. It thus describes the extent of the pivoting movement of the upper part relative to the lower part about the axis of rotation mentioned.
  • the angle is meant which the top of the drainage strip (or its upper part), which faces the underside of the surrounding screen, with the horizontal plane.
  • the angle of inclination can be determined both as a gradient angle in% and in degrees.
  • a device which enables such a linear and / or rotary movement (pivoting movement) of the upper part relative to the lower part.
  • the width direction of the fibrous web or sieve can be the X direction and the running direction of the fibrous web or sieve to be produced can be the positive Y direction.
  • the thickness direction of the fibrous web or of the screen then results as the Z direction (plumb direction).
  • the stationary lower part of the drainage bar is then in the XY plane.
  • the angle of inclination according to the invention can be understood as that angle which results from the rotation of the upper part relative to the lower part about the X axis.
  • the angle of inclination could also describe a corresponding rotation of the drainage strip or its upper part relative to the horizontal plane about one or more of the axes mentioned (X, Y, Z axis).
  • the at least one drainage bar is infinitely pivotable. This means that - within the limits of permissibility - it can take any swivel angle.
  • the drainage strip can comprise an upper part and a lower part, wherein the lower part can be connected to the drainage box of the drainage device in a stationary, ie fixed, manner.
  • the upper part can then be pivoted or adjusted in height about an axis of rotation which corresponds to the longitudinal axis of the drainage strip.
  • a drive designed as a component according to the invention can be provided on each such adjustable drainage strip.
  • a drainage strip according to the invention is usually longer than the width of the fibrous web to be produced.
  • the longitudinal direction of the drainage strip corresponds to the width direction of the fibrous web to be produced.
  • a fibrous web in the sense of the invention is to be understood as a scrim of fibers such as cellulose, plastic fibers, glass fibers, carbon fibers, additives, additives or the like.
  • the fibrous web can be designed as a paper, cardboard or tissue web. It can essentially comprise wood fibers, whereby small amounts of other fibers or also additives can be present. Depending on the application, this is left to the specialist.
  • Dewatering devices comprise a drainage box which serves to support an endless, revolving sieve on which the fibrous web is formed from the fibrous suspension flowing continuously onto the sieve.
  • the drainage box has - seen in the running direction of the fibrous web to be produced - a plurality of spaced apart drainage strips.
  • the bottom of the strainer sweeps over the top of the upper part of the drainage strips.
  • the upper part faces the sieve and generally has a wearing part which is connected to the upper part.
  • the wearing part usually has a scraper-like front edge. This also serves to remove the white water that has flowed from the forming fibrous web through the mesh of the screen and adheres to the underside of the screen.
  • Individual or all drainage strips are designed to be pivotable so that the drainage capacity can be adapted to the type of paper produced depending on the angle of inclination.
  • the dewatering section and thus the dewatering performance are adapted to the fibrous web to be produced.
  • the drainage strips are equipped with a drive to adjust the height and / or angle.
  • the drive can be designed according to the invention.
  • the invention also relates to a machine for producing and / or treating a fibrous web, in particular paper, cardboard or tissue paper web, comprising the component according to the invention.
  • FIG. 1 shows a schematic, partially longitudinal sectional illustration of a
  • Fig. 2 is a schematic cross-sectional view of a
  • Embodiment of a component according to the invention in a drainage device Embodiment of a component according to the invention in a drainage device.
  • FIG. 1 shows a schematic, partially longitudinal sectional illustration of a wire section 200 of a machine 100, shown only in part, for producing a machine
  • Fibrous web 2 from at least one fibrous suspension.
  • the machine direction L runs from left to right here.
  • the fibrous web 2 it can in particular a paper, cardboard or packaging paper web.
  • the fibrous suspension passes from a headbox onto a screen designed as an endless belt, which rotates relative to the dewatering device 1.
  • the fibers deposited on the top of the sieve are transported further with it.
  • the excess water of the fibrous suspension reaches the dewatering device 1 via the underside of the sieve.
  • the fibrous web 2 thus formed on the upper side of the sieve is transported to the next processing station by means of the same.
  • a drainage device 1 is shown in FIG. 2 in the same section as in FIG.
  • the dewatering device 1 can be part of the screen section 200 of the machine 100 shown in FIG. 1.
  • the drainage device 1 comprises a box-shaped base body (drainage box 4), which can optionally be acted upon by a vacuum source 3, indicated by dashed lines and preferably controllable.
  • the latter serves to improve the dewatering of the fiber suspension, is assigned to the wire section 200 and in the present case is arranged within the dewatering box 4.
  • a plurality of drainage strips 5 extending and spaced transversely to the machine direction L (arrow in FIG. 1) are arranged on the base body 4.
  • the drainage strips 5 are seen in the machine direction L, the
  • Running direction that is, the running direction of the fibrous web to be produced in the machine corresponds to each other.
  • these are arranged parallel and at a distance from one another with regard to their longitudinal axes, which run transversely to the machine direction L into the image plane.
  • Drainage strips 5 arranged as shown in Fig. 2, then they preferably form a flat and several drainage slots 6 having drainage surface 5 'together.
  • the latter runs essentially parallel to the screen running around it or the fibrous web 2 to be produced thereon.
  • Each of the individual drainage strips 5 comprises an upper part 7 facing the sieve and a lower part 8 facing the base body 4.
  • the latter is connected to the base body 4 in a stationary manner.
  • Each adjustable drainage strip more precisely the upper part 7 of such, can have a drive, e.g. be assigned in the form of an electric drive. This serves to adjust the upper part 7 in relation to the lower part 8 in fleas and / or angles.
  • the drive can now be designed as a component 9 which is touched or washed by water from the outside.
  • This comprises a housing 10.
  • a current-carrying device 11 e.g. arranged in the form of an electrical consumer, such as an electric motor or control electronics.
  • the current-carrying device 11 can also be an electrical conductor, such as a cable or a terminal box or distributor.
  • the space delimited by the wall of the housing 10 and the current-carrying device 11 is partially or completely filled with an electrically non-conductive fluid. Regardless of the embodiment shown, it is sufficient if the current-carrying parts of the current-carrying device 11 are directly surrounded or surrounded by the electrically non-conductive fluid.
  • a device 10.1 for draining off liquids such as water and / or the electrically non-conductive fluid contained therein can be provided.
  • a device can comprise a hole in the housing 10 which can be closed by means of a screw.
  • the component 9 designed as a drive can have an inlet 10.2 (see arrow) for the fluid according to the invention to the housing 10 and an outlet 10.3 (see arrow) for removing the fluid from the housing 10.
  • a container for the fluid according to the invention and a conveying device, for example in the form of a pump, a circuit of the electrically non-conductive fluid can be produced through the housing 10.
  • the housing 10 of the component 9 is at least partially filled with an electrically non-conductive fluid from the environment.

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un élément structural d'une machine destiné à la production et/ou au traitement d'une bande de matière fibreuse, notamment d'une bande de papier, de carton ou de tissu, comprenant un boîtier dans lequel est disposé un dispositif conducteur de courant. Le boîtier est rendu étanche contre un débordement d'un fluide vers l'environnement ou, inversement, depuis l'environnement dans le boîtier. Le boîtier est au moins partiellement rempli d'un fluide non conducteur électriquement, de sorte que le dispositif conducteur de courant est électriquement isolé du boîtier. L'invention concerne en outre un mécanisme d'entraînement, un arrangement d'assèchement et une telle machine.
PCT/EP2019/073955 2018-09-13 2019-09-09 Élément structural d'une machine pour la production et/ou le traitement d'une bande de matière fibreuse Ceased WO2020053130A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018122341.2 2018-09-13
DE102018122341.2A DE102018122341A1 (de) 2018-09-13 2018-09-13 Bauteil einer Maschine zur Herstellung und/oder Behandlung einer Faserstoffbahn

Publications (1)

Publication Number Publication Date
WO2020053130A1 true WO2020053130A1 (fr) 2020-03-19

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ID=67928826

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/073955 Ceased WO2020053130A1 (fr) 2018-09-13 2019-09-09 Élément structural d'une machine pour la production et/ou le traitement d'une bande de matière fibreuse

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Country Link
DE (1) DE102018122341A1 (fr)
WO (1) WO2020053130A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6382044B1 (en) * 2000-04-14 2002-05-07 Abb Automation Inc. Actuator having a rotational power source
US20100086672A1 (en) * 2006-03-06 2010-04-08 Von Drasek William A Method and apparatus for monitoring and controlling the application of performance enhancing materials to creping cylinders
WO2010142346A1 (fr) * 2009-06-12 2010-12-16 Abb Technology Ag Milieu d'isolation diélectrique
EP3023996A1 (fr) * 2014-11-19 2016-05-25 Schneider Electric Industries SAS Appareil électrique à isolation électrique et extinction d'arcs électriques améliorées et procédé associé

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI126286B (fi) * 2012-02-14 2016-09-15 Valmet Technologies Inc Järjestelmä sähkölaitteen jäähdyttämiseksi kuiturainakoneessa
DE202012012642U1 (de) * 2012-07-18 2013-07-24 Voith Patent Gmbh Aktuartor und Aktuatorsystem für eine Quer- und/oder Längsprofilverstellung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6382044B1 (en) * 2000-04-14 2002-05-07 Abb Automation Inc. Actuator having a rotational power source
US20100086672A1 (en) * 2006-03-06 2010-04-08 Von Drasek William A Method and apparatus for monitoring and controlling the application of performance enhancing materials to creping cylinders
WO2010142346A1 (fr) * 2009-06-12 2010-12-16 Abb Technology Ag Milieu d'isolation diélectrique
EP3023996A1 (fr) * 2014-11-19 2016-05-25 Schneider Electric Industries SAS Appareil électrique à isolation électrique et extinction d'arcs électriques améliorées et procédé associé

Also Published As

Publication number Publication date
DE102018122341A1 (de) 2020-03-19

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