EP1348805B1 - Sealing device - Google Patents

Sealing device Download PDF

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Publication number
EP1348805B1
EP1348805B1 EP03001596A EP03001596A EP1348805B1 EP 1348805 B1 EP1348805 B1 EP 1348805B1 EP 03001596 A EP03001596 A EP 03001596A EP 03001596 A EP03001596 A EP 03001596A EP 1348805 B1 EP1348805 B1 EP 1348805B1
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EP
European Patent Office
Prior art keywords
sealing
sealing device
moving surface
strip
sealing element
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.)
Expired - Fee Related
Application number
EP03001596A
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German (de)
French (fr)
Other versions
EP1348805A1 (en
Inventor
Ulrich Begemann
Joachim Dr. Grabscheid
Jörg Dr. Rheims
Ansgar MÜLLER
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 EP1348805A1 publication Critical patent/EP1348805A1/en
Application granted granted Critical
Publication of EP1348805B1 publication Critical patent/EP1348805B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/10—Suction rolls, e.g. couch rolls

Definitions

  • the invention relates to a sealing device for the lateral sealing of at least one adjacent to a moving surface pressure or negative pressure zone in a paper machine with at least one of the moving surface opposite sealing element, pivotally mounted on a hinge and for application to the moving surface by appropriate pivoting with a contact pressure can be acted upon.
  • Such a sealing device is for example in the US-A-5 580 424 , of the DE 197 51 283 and the DE 198 42 837 described.
  • Such sealing devices are used, for example, to seal off the interior of a suction box, whose side walls are provided with the sealing device, under negative pressure from the environment.
  • a sealing element which cooperates sealingly in a sealing area with a Saugwalzenmantel and serving in a damping of the bore ventilation ventilation area with the roll shell forms a ventilation gap and which is pivotally mounted via a connected at the outlet end rigidly connected to a suction box. Due to the deflection of the suction box and roller tube but here can the Change the distance between the rear end of the sealing element in the running direction of the roller and the roll shell over the roll length by up to 15 mm. The damping of the bore ventilation from the inside of the roll is therefore very different. For a specific installation position and a certain operating vacuum, these deformations can be compensated for at least approximately by a corresponding machining of the mounting surface of the hinge strip.
  • the roller is for different Installation positions provided with different vacuums, narrow limits are set such compensation.
  • This method also has the effect that when applying the sealing strips without vacuum and the associated Saugkastenverformung a respective sealing strip by torsion must compensate for the strong distance differences between the joint and roller tube, but may not be able to do so. Due to wear of the sealing strip, the ventilation wedge changes between the sealing strip and the roller tube. With increasing wear, the noise increases, until finally there is no difference to conventional sealing strips.
  • the aim of the invention is therefore to provide an improved sealing device of the aforementioned type, with which the aforementioned disadvantages are avoided.
  • a sealing device for the lateral sealing of at least one adjacent to a moving surface overpressure or negative pressure zone in a paper machine with at least one of the moving surface opposite sealing element which is pivotally mounted via a hinge and for application to the moving surface by corresponding pivoting can be acted upon by a contact force, wherein the joint and with this the pivot axis in particular in the direction of the contact pressure on the moving surface to and from this away adjustable and fixable in its respective position.
  • the joint is preferably formed on an adjustable and fixable in their respective position bar, which may extend in particular transversely to the direction of movement of the moving surface.
  • the bar can be fixed, for example, on a support or the like.
  • the strip can be fixed in its respective position by means of a clamping device.
  • the clamping device in question may comprise, for example, at least one piston and / or at least one pressure hose.
  • the strip is provided with spacers and is adjustable in an end position in which these spacers abut the moving surface and thus define a predetermined position of the joint relative to the moving surface.
  • spacers may for example be at least partially formed by nubs, rollers and / or the like.
  • the pivot axis of the sealing element defined by the joint preferably extends transversely to the running direction of the moving surface.
  • the strip may in particular be provided with an engagement section which engages in a groove provided in the sealing element.
  • the relevant groove is preferably at one in the running direction the moving surface considered rear end face of the sealing element provided.
  • the sealing element can generally be arranged in the running direction of the moving surface between the strip and a particular carrier or the like associated stop.
  • the front end face of the sealing element facing the stop is preferably convexly curved in order, if appropriate, to allow unhindered pivoting of the sealing element.
  • the sealing element comprises a ventilation lug which extends in the running direction of the moving surface from sealingly cooperating with this surface end of the sealing element, in a subsequent to the sealing area ventilation area for ventilation in particular of the moving surface provided openings.
  • the ventilation approach with the moving surface preferably forms a widening in the direction of travel gap.
  • the sealing element is preferably acted upon for application to the moving surface in the region of its sealingly cooperating with this surface end.
  • the sealing element in the region of its sealing end cooperating with the moving surface, may have a projection which extends generally away from the moving surface and may be acted upon correspondingly via this approach.
  • the sealing element for applying to the moving surface for example, via at least one pressure hose or the like acted upon accordingly.
  • Also for adjusting the bar e.g. be provided at least one pressure hose.
  • the strip is made of several parts, in particular two parts, and the strip parts relative to each other by a defined amount adjustable, in particular displaceable, are.
  • the multi-part bar can initially be adjusted in the extended state so far that the ventilation approach of the sealing element bears against the moving surface.
  • the sealing element can also be acted upon via the strip in particular so that the ventilation approach is pressed against the moving surface.
  • the relevant surface of the ventilation approach is hereby cleaned accordingly and "reground”.
  • the bar comprises two adjustable by a predetermined stroke relative to each other, in particular displaceable, strip parts, wherein the joint or the engaging portion having strip part after successful fixation of the other strip part according to the predetermined stroke is retractable again lift the ventilation approach again from the moving surface.
  • the limited stroke preferably corresponds to the distance of the rear edge of the sealing element from the moving surface in the direction of travel of the moving surface.
  • the strip part or the engagement portion having strip part may be particularly resiliently loaded in its retracted position.
  • the strip part or the engagement portion having strip portion is acted upon via at least one pressure hose in its extended position.
  • the other strip part is preferably fixable via a clamping device in its respective position.
  • the clamping device may comprise, for example, a piston and / or at least one pressure hose.
  • the sealing element can be fixed in its respective pivot position via a clamping device.
  • the clamping device may, for example, again comprise at least one piston and / or at least one pressure hose.
  • the clamping device is designed so that the sealing element dissolves when the piston or pressure hose from the moving surface, whereby the wear is reduced accordingly.
  • a stop element which can be fixed at a respective distance from the moving surface and which limits the application movement of the sealing element can be provided.
  • the stop element is preferably fixable via a clamping device in its respective position.
  • the clamping device may again comprise at least one piston and / or at least one pressure hose.
  • the stop element for example, at least one pressure hose with entrainment of the sealing element at least again as far as retractable, that the sealing element separates from the moving surface.
  • the clamping device is designed so that the stop element is at least again pulled back so far when the piston or pressure hose under the entrainment of the sealing element that the sealing element detaches from the moving surface.
  • the sealing device can be used in particular for the lateral sealing of at least one pressure zone adjacent to the inner or outer wall of a rotating jacket of a suction or blower roll or to a moving belt.
  • the sealing element can in particular also be designed as a sealing strip extending at least substantially over the entire length of the roll.
  • FIG. 1 shows, in a schematic, partially sectioned illustration, a first exemplary embodiment of a sealing device 10 for the lateral sealing of at least one overpressure or underpressure zone adjacent to a moving surface 12 in a paper machine.
  • the sealing device 10 is disposed within a suction roll 14, for example, to seal a pressure zone P 1 from the environment in which a higher pressure P 2 prevails.
  • a higher pressure P 2 prevails.
  • the moving surface 12 provided with holes 16 jacket 18 of the suction roller 14, the moving surface 12.
  • About the suction roller 14 may be performed in particular a paper web to be dewatered.
  • the ambient pressure P 2 can also be smaller than the pressure P 1 generated, for example, in the interior of a suction box, in particular when the sealing device according to the invention is used in conjunction with a blow box associated with a blowing roller.
  • the sealing device comprises at least one of the moving surface 12 opposite sealing element 20 which is pivotally mounted via a hinge 22 and for applying to the moving surface 12 by appropriate pivoting with a contact pressure F P acted upon, in the present case, for example, by a preferably transversely to Running direction L of the moving surface 12 extending pressure hose 24 is generated.
  • the joint 22 is in particular in the direction of the contact pressure F P generally on the moving surface 12 to and away from this adjustable and fixable in its respective position.
  • the articulation 22, and thus the pivot axis 26 formed by it can be positioned in a predeterminable manner relative to the moving surface 12, ie in this case the inner surface of the suction roller 14.
  • the hinge 22 is formed on a corresponding positionable element 28, which may be, for example, a bar or the like.
  • the displacement direction V R of this adjustable element 28 is accordingly, for example, parallel to the direction of the contact pressure F P.
  • the pivot axis 26 of the sealing element 20 defined by the joint 22 extends transversely to the running direction L of the moving surface 12.
  • the element or strip 28 for forming the joint can be provided with an engagement section 30, which engages in a groove 32 provided in the sealing element 20.
  • the groove 32 is provided on a viewed in the direction L of the moving surface 12 rear end face 34 of the sealing element 20.
  • the engagement portion 30 and the groove 32 extend transversely to the direction of travel of the moving surface 12 to form the transverse pivot axis 26.
  • the sealing element 20 can generally be arranged in the running direction L of the moving surface 12 between the adjustable element 28 formed for example by a strip and a stop 38 associated in particular with a carrier 36 or the like.
  • the stop 38 facing the front end face 40 of the sealing element 20 is preferably curved convex, to allow an unhindered pivoting of the sealing element 20, if necessary.
  • the sealing element 20 is provided with a ventilation lug 42 extending in the direction L of the moving surface 12 from sealingly cooperating with this surface 12 end 44 of the sealing member 20 away, in a subsequent to the sealing region 46 ventilation area 48 for ventilation of in the moving surface 12 provided openings or holes 16 to provide.
  • the ventilation projection 42 forms, with the moving surface 12, a gap 50 widening in its running direction L.
  • the sealing elements 20 for applying to the moving surface 12 in the region of an end 44 cooperating sealingly with this surface 12, for example, by at least one extending in the transverse direction pressure hose 24 can be acted upon accordingly.
  • the sealing element 20 is provided in the region of its sealing end 44 with a generally extending away from the moving surface 44 approach 52 and 52 via this approach, for example, by the pressure hose 24 acted upon.
  • the sealing element 20 may in particular be designed as a sealing strip extending transversely to the running direction L of the moving surface 12 and in particular as a sealing strip extending at least substantially over the entire length of the suction roll 14.
  • the pressure hose 24 may be arranged, for example, between the carrier 36 and the projection 52 of the sealing element 20.
  • FIG. 2 shows, in a schematic, partially sectioned illustration, a further embodiment of the sealing device 10, in which the joint 22 is provided on an adjustable bar 28 which can be fixed in its respective position.
  • the strip 28 extends again transversely to the direction L of the moving surface 12th
  • the strip 28 is also in the present case, for example, again in the direction of the contact force F P movable.
  • the strip 28 can be fixed to a carrier 36. It may be, for example, the same carrier 36, on which the stop 38 is provided.
  • the strip can be fixed in its respective position via a clamping device 54.
  • the clamping device 54 may comprise at least one piston 56 and / or at least one pressure hose 58.
  • an e.g. strip-like piston 56 is provided, which is pressed by a, for example, in the transverse direction extending pressure hose 58 against the bar 28 to clamp this between the piston 56 and a counter-surface 60, which may be provided again for example on the carrier 36.
  • the strip 28 is correspondingly adjustable in the pressing direction, for example by at least one pressure hose 62.
  • the clamping device 54 can be activated to fix the bar 28 in the relevant position by clamping.
  • this sealing device 10 may at least substantially in particular again be designed as that of Figure 1. Parts corresponding to each other are assigned the same reference numerals.
  • FIG. 3 shows, in a schematic, partially sectioned illustration, a further embodiment of the sealing device 10 with a strip 28 provided for forming the joint 22.
  • the strip 28 is merely provided, for example, with spacers 64 and, for example, adjustable again by at least one pressure hose 62 into an end position in which these spacers 64 abut the moving surface 12 and thus a predefinable position of the joint 22 relative to the moving surface 12 define.
  • a plurality of spacers distributed transversely to the running direction L over the moving surface 12 are preferably provided.
  • a plurality of spacers 64 distributed in the width direction can thus be provided in the form of nubs. These can be formed for example by nubs, rollers and / or the like. Examples of possible cross-sectional formers of such spacers 64 are shown in the lower part of FIG.
  • these spacers 64 may have a rectangular cross section a), a triangular cross section b), an oval cross section c), etc.
  • the spacers 64 can be lifted by a predetermined return stroke again from the moving surface 12.
  • the clamping device 54 may be designed so that the bar 28 moves at a loading of the piston 56 and the pressure hose 58 a piece down and accordingly the spacers 64 are lifted from the moving surface 12.
  • the piston 56 and the pressure hose 58 are in this case, for example, with respect to the horizontal arranged according to inclined guide 66.
  • the piston 56 may again be formed by an intermediate strip extending transversely to the running direction L of the moving surface 12.
  • a further intermediate strip 68 may be provided, which may also be arranged again in an inclined guide 69.
  • the two guides 66, 69 may for example be provided again in the carrier 36.
  • pressure hoses 70 such as, for example, O-ring bands made of silicone or the like may also be arranged, which in the present case, however, have a significantly smaller cross section than the pressure tube 58.
  • This clamping device 54 which effects a corresponding return stroke, can in general also be designed in particular as described in US Pat US-A-5 580 424 is described.
  • sealing device 10 may in particular be embodied at least substantially again as in accordance with FIG. 1.
  • Mutually corresponding parts are assigned the same reference numerals.
  • FIG. 4 shows, in a schematic, partially sectioned illustration, a further embodiment of the sealing device 10 with a strip 28 provided for forming the joint 22.
  • this strip 28 is designed in two parts, wherein the two strip parts 28 ', 28 "in particular in the direction of the contact pressure F P relative to each other by a defined amount a adjustable, in particular slidably, which preferably corresponds to the distance a D provided during normal operation of the rear edge 72 in the running direction L of the moving surface 12.
  • the two-part bar 28 is initially in the extended state, e.g. via at least one pressure hose 62 as far as the moving surface 12 adjustable that the ventilation lug 42 of the sealing element 20 and the rear edge 72 rests against the moving surface 12 (see dashed line illustration of the sealing element).
  • the sealing element 20 via the bar 28 in particular so acted upon that the ventilation lug 42 is pressed against the moving surface 12.
  • the two strip parts 28 ', 28 are so relative to each other by the predetermined stroke a so adjustable that the rear edge 72 of the sealing member 20 can be applied to the moving surface 12 and then, for example, after the fixing of the outer rail part 28" by the predetermined stroke a is again lifted from the moving surface 12.
  • the strip part 22 'having the joint 22 or the engagement section 30 is arranged with its opposite end inside the outer strip part 28 "and guided therein.
  • the strip part 28 'comprising the joint 22 or the engagement section 30 is e.g. via one or more compression springs 74 resiliently loaded in its retracted position shown in Figure 4 by solid lines.
  • the outer strip part 28 ' is, for example, again fixable in its respective position via such a clamping device 54 as has been described in connection with the embodiment according to FIG.
  • the clamping device 54 may thus comprise, for example, again at least one piston 56 and / or at least one pressure hose 58, in order to clamp the outer strip part 28 ", for example between the particular strip-like piston 56 and a counter-surface 60.
  • the two-part bar 28 is thus pushed apart in the present case, for example via the pressure hose 76 and, for example via the pressure hose 62 in the direction of the moving surface 12 moves until the sealing element 20 rests with the rear edge 72 on the moving surface 12.
  • the outer strip part 28 "is fixed by means of the clamping device 54, and the inner strip part 28 'is displaced counter to the pressing direction F P in accordance with the predefined defined stroke a
  • the limited stroke a corresponds to the distance a D of the rear edge 72 resulting during operation from the moving surface 12, which is in particular constant over the width.
  • this sealing device may in particular at least substantially again have the same structure as that according to FIG. Corresponding parts are assigned the same reference numerals.
  • FIG. 5 shows, in a schematic, partially sectioned illustration, a further embodiment of the sealing device 10, in which the sealing element 20 can be fixed in its respective pivoting position via a clamping device 78.
  • the clamping device 78 may in particular comprise at least one piston 80 and / or at least one pressure hose 82 again.
  • the piston 80 may in particular be designed like a strip again and extend transversely to the direction L of the moving surface 20. Also, the pressure hose 82 extends in particular again in the transverse direction.
  • the clamping device in question could in particular also be designed so that the sealing element 20 is released from the moving surface 12 when the piston or pressure hose is acted on.
  • this embodiment may in particular at least substantially have the same structure as the embodiments described above again. Corresponding parts are assigned the same reference numerals.
  • FIG. 6 shows a schematic, partially sectioned illustration of a further embodiment of the sealing device 10.
  • a stop element 84 which can be fixed at a respective distance from the moving surface 12 and which limits the application movement of the sealing element 20 is provided.
  • this stop element 84 comprises an engagement section 86 which engages with play in a groove 88 provided in the front end face 40 of the sealing element 20.
  • the stop element 84 can be fixed in the present case via a clamping device 90 in its respective position.
  • the clamping device 90 may, for example, again comprise at least one piston 92 and / or at least one pressure hose 94.
  • the piston 92 may again as a strip-like, be executed transversely to the direction L of the moving surface 12 extending element.
  • the pressure hose 94 preferably extends again in the transverse direction.
  • the stop element 84 can be at least again pulled back to the extent that the sealing element 20 is released again from the moving surface 12 while taking the previously applied via the pressure hose 24 to the moving surface 12 sealing member 20 with entrainment of this sealing element 20.
  • this embodiment can in particular at least substantially have such a structure as the embodiments described with reference to FIGS 1 to 5. Corresponding parts are assigned the same reference numerals.
  • the embodiment according to FIG. 7 differs from that according to FIG. 6 essentially in that the clamping device 90 is designed in a manner comparable to the clamping device 54 described in connection with FIG. In the present case, by the corresponding embodiment of the clamping device 90, the stop element 84 is thus at least again pulled back so far when the piston 92 or pressure hose 94 is entrained with the sealing element 20 that the sealing element 20 is released from the moving surface 12.
  • the stop element may be resiliently loaded against the lower edge of the groove 88.
  • this embodiment can be at least substantially carried out again as the embodiments described above.
  • Corresponding parts are assigned the same reference numerals.
  • FIGS. 8 to 11 show, in a diagrammatic partial representation, further embodiments of the adjustable strip 28 with associated clamping device 54.
  • the respective clamping device 54 may, for example, again comprise at least one piston 56 and / or at least one pressure hose 58.
  • a strip-like piston 56 is provided, which is pressed by a, for example, in the transverse direction extending pressure hose 58 against the bar 28 to clamp them between the piston 56 and a mating surface 60, for example, again by an intermediate bar 68 (FIG. cf., in particular, FIGS. 8 and 9) or may be provided on another counter element (see eg FIGS. 10 and 11) or on the carrier.
  • the strip 28 is correspondingly adjustable in the pressing direction, for example, again by at least one pressure hose 62 (cf., in particular, FIGS. 8 and 11).
  • the clamping device 54 can be activated to fix the bar 28 in the desired position by clamping.
  • the clamping device 54 is similar to that of Figure 3 again designed so that the bar 28 is moved at a loading of the piston 56 and the pressure hose 58 a piece down.
  • the piston 56 and the pressure hose 58 are again arranged in a guide 66 which is correspondingly inclined here, for example, relative to the horizontal.
  • the piston 56 for example, again by a transversely be formed to the running direction L of the moving surface 12 (see also Figure 3 again) extending intermediate strip.
  • a further intermediate strip 68 (cf., in particular, FIGS. 8 and 9) can be provided on the other side of the strip 28, for example.
  • this intermediate strip 68 is also arranged again in an obliquely running guide 69.
  • such an oblique guide is not mandatory.
  • the strip 28 can now be roughened, for example, on both sides or only on one side and / or, in the extreme case, for example, be provided with a sawtooth profile 100 in order to reduce the friction, e.g. between the strips 56, 68 to increase accordingly and thus to achieve larger angles in the guide.
  • the sawtooth profile may also be applied to the ledges or guides 56, 68 (see, for example, Figure 8). As a result, larger means, in particular between the direction of movement of the strips 56, 58 and the bar 28 can be achieved.
  • a lug 102 or the like prevents the teeth from getting caught.
  • the piston 56 is no longer used as a guide.
  • the relevant guide has therefore been omitted here.
  • the strip 28 must be pressed against the guide differently, for example via an elastic, compressible material 104 (cf., for example, FIG. 9), hoses, springs 106 (cf., for example, FIG. 10) and / or the like.
  • the distance a D may possibly be relatively small, it is also conceivable to omit the spacers 64 (cf., for example, FIG. 3) and, for example, to use the strip as a stop, as shown in FIG.

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Abstract

A paper-making assembly has a drum with a pivoting (22) inner pressure seal (20) in contact with the moving inner surface (12) and separating two zones of different pressure (P1, P2). The pivot point (22) and associated rocking interface (26) are esp. variable (VR) with respect to the drum inner surface (12). The pivot point (22) forms part of a fixed strip (28) which is transverse to the direction of rotation (L) and is clamped in the required position by a piston or pneumatic hose. The fixed strip has spacers which are adjustable in the end-position.

Description

Die Erfindung betrifft eine Dichtungseinrichtung zur seitlichen Abdichtung wenigstens einer an eine bewegte Fläche angrenzenden Überdruck- oder Unterdruckzone in einer Papiermaschine mit wenigstens einem der bewegten Fläche gegenüberliegenden Dichtelement, das über ein Gelenk schwenkbar gelagert und zum Anlegen an die bewegte Fläche durch entsprechendes Verschwenken mit einer Anpresskraft beaufschlagbar ist.The invention relates to a sealing device for the lateral sealing of at least one adjacent to a moving surface pressure or negative pressure zone in a paper machine with at least one of the moving surface opposite sealing element, pivotally mounted on a hinge and for application to the moving surface by appropriate pivoting with a contact pressure can be acted upon.

Eine solche Dichtungseinrichtung ist beispielsweise in der US-A-5 580 424 , der DE 197 51 283 und der DE 198 42 837 beschrieben.Such a sealing device is for example in the US-A-5 580 424 , of the DE 197 51 283 and the DE 198 42 837 described.

Derartige Dichtungseinrichtungen dienen beispielsweise dazu, das unter einem Unterdruck stehende Innere eines Saugkastens, dessen Seitenwände mit der Dichtungseinrichtung versehen sind, gegenüber der Umgebung abzudichten.Such sealing devices are used, for example, to seal off the interior of a suction box, whose side walls are provided with the sealing device, under negative pressure from the environment.

Bei der DE 197 51 283 wird zwar das Dichtelement in die Betriebspostition geschwenkt, jedoch kann die Betriebsdauer infolge des Verschleißes noch nicht befriedigen.In the DE 197 51 283 Although the sealing element is pivoted into the operating position, but the operating time due to the wear is still not satisfactory.

Es wurde auch bereits ein Dichtelement vorgeschlagen, das in einem Dichtbereich dichtend mit einem Saugwalzenmantel zusammenwirkt und in einem der Bedämpfung der Bohrungsbelüftung dienenden Belüftungsbereich mit dem Walzenmantel einen Belüftungsspalt bildet und das über ein am ablaufenden Ende starr mit einem Saugkasten verbundenes Gelenk schwenkbar gelagert ist. Aufgrund der Durchbiegung von Saugkasten und Walzenrohr kann sich hierbei jedoch der Abstand zwischen dem in Laufrichtung der Walze hinteren Ende des Dichtelements und dem Walzenmantel über die Walzenlänge um bis zu 15 mm verändern. Die Bedämpfung der Bohrungsbelüftung von der Walzeninnenseite her ist dadurch sehr unterschiedlich. Für eine bestimmte Einbauposition und ein bestimmtes Betriebsvakuum können diese Verformungen zumindest angenähert durch eine entsprechende Bearbeitung der Anschraubfläche der Gelenkleiste kompensiert werden. Ist die Walze jedoch für verschiedene Einbaupositionen mit unterschiedlichen Vakua vorgesehen, sind einer solchen Kompensation enge Grenzen gesetzt. Diese Methode bewirkt außerdem, dass beim Anlegen der Dichtleisten ohne Vakuum und der damit verbundenen Saugkastenverformung eine jeweilige Dichtleiste durch Torsion die starken Abstandsunterschiede zwischen Gelenk und Walzenrohr ausgleichen muss, unter Umständen jedoch gar nicht dazu in der Lage ist. Durch Verschleiß der Dichtleiste verändert sich der Belüftungskeil zwischen Dichtleiste und Walzenrohr. Mit zunehmendem Verschleiß nimmt das Geräusch zu, bis schließlich kein Unterschied mehr zu konventionellen Dichtleisten besteht.It has also been proposed a sealing element which cooperates sealingly in a sealing area with a Saugwalzenmantel and serving in a damping of the bore ventilation ventilation area with the roll shell forms a ventilation gap and which is pivotally mounted via a connected at the outlet end rigidly connected to a suction box. Due to the deflection of the suction box and roller tube but here can the Change the distance between the rear end of the sealing element in the running direction of the roller and the roll shell over the roll length by up to 15 mm. The damping of the bore ventilation from the inside of the roll is therefore very different. For a specific installation position and a certain operating vacuum, these deformations can be compensated for at least approximately by a corresponding machining of the mounting surface of the hinge strip. However, the roller is for different Installation positions provided with different vacuums, narrow limits are set such compensation. This method also has the effect that when applying the sealing strips without vacuum and the associated Saugkastenverformung a respective sealing strip by torsion must compensate for the strong distance differences between the joint and roller tube, but may not be able to do so. Due to wear of the sealing strip, the ventilation wedge changes between the sealing strip and the roller tube. With increasing wear, the noise increases, until finally there is no difference to conventional sealing strips.

Ziel der Erfindung ist es daher, eine verbesserte Dichtungseinrichtung der eingangs genannten Art zu schaffen, mit der die zuvor genannten Nachteile vermieden werden.The aim of the invention is therefore to provide an improved sealing device of the aforementioned type, with which the aforementioned disadvantages are avoided.

Diese Aufgabe wird nach der Erfindung gelöst durch eine Dichtungseinrichtung zur seitlichen Abdichtung wenigstens einer an eine bewegte Fläche angrenzenden Überdruck- oder Unterdruckzone in einer Papiermaschine mit wenigstens einem der bewegten Fläche gegenüberliegenden Dichtelement, das über ein Gelenk schwenkbar gelagert und zum Anlegen an die bewegte Fläche durch entsprechendes Verschwenken mit einer Anpresskraft beaufschlagbar ist, wobei das Gelenk und mit diesem die Schwenkachse insbesondere in Richtung der Anpresskraft allgemein auf die bewegte Fläche zu und von dieser weg verstellbar und in seiner jeweiligen Position fixierbar ist.This object is achieved according to the invention by a sealing device for the lateral sealing of at least one adjacent to a moving surface overpressure or negative pressure zone in a paper machine with at least one of the moving surface opposite sealing element which is pivotally mounted via a hinge and for application to the moving surface by corresponding pivoting can be acted upon by a contact force, wherein the joint and with this the pivot axis in particular in the direction of the contact pressure on the moving surface to and from this away adjustable and fixable in its respective position.

Dabei ist das Gelenk vorzugsweise an einer verstellbaren und in ihrer jeweiligen Position fixierbaren Leiste gebildet, die sich insbesondere quer zur Laufrichtung der bewegten Fläche erstrecken kann.In this case, the joint is preferably formed on an adjustable and fixable in their respective position bar, which may extend in particular transversely to the direction of movement of the moving surface.

Die Leiste kann beispielsweise an einem Träger oder dergleichen fixierbar sein.The bar can be fixed, for example, on a support or the like.

Gemäß einer bevorzugten Ausführungsform der erfindungsgemäßen Dichtungseinrichtung ist die Leiste über eine Klemmeinrichtung in ihrer jeweiligen Lage fixierbar.According to a preferred embodiment of the sealing device according to the invention, the strip can be fixed in its respective position by means of a clamping device.

Die betreffende Klemmeinrichtung kann beispielsweise wenigstens einen Kolben und/oder wenigstens einen Druckschlauch umfassen.The clamping device in question may comprise, for example, at least one piston and / or at least one pressure hose.

Von Vorteil ist insbesondere auch, wenn die Leiste mit Distanzhaltern versehen und in eine Endposition verstellbar ist, in der diese Distanzhalter an der bewegten Fläche anliegen und damit eine vorgebbare Position des Gelenks relativ zur bewegten Fläche definieren. Dabei können insbesondere mehrere quer zur Laufrichtung über die bewegte Fläche verteilte Distanzhalter vorgesehen sein. Die Distanzhalter können beispielsweise zumindest teilweise durch Noppen, Rollen und/oder dergleichen gebildet sein.It is particularly advantageous if the strip is provided with spacers and is adjustable in an end position in which these spacers abut the moving surface and thus define a predetermined position of the joint relative to the moving surface. In this case, in particular a plurality of spacers distributed transversely to the running direction over the moving surface can be provided. The spacers may for example be at least partially formed by nubs, rollers and / or the like.

Von Vorteil ist insbesondere auch, wenn die Distanzhalter durch einen vorgebbaren Rückhub insbesondere beim Fixieren der Leiste wieder von der bewegten Fläche abhebbar sind.It is particularly advantageous if the spacers are lifted by a predetermined return stroke, in particular when fixing the bar again from the moving surface.

Die durch das Gelenk definierte Schwenkachse des Dichtelements erstreckt sich vorzugsweise quer zur Laufrichtung der bewegten Fläche.The pivot axis of the sealing element defined by the joint preferably extends transversely to the running direction of the moving surface.

Zur Bildung des Gelenks kann die Leiste insbesondere mit einem Eingriffsabschnitt versehen sein, der in eine in dem Dichtelement vorgesehene Nut eingreift. Die betreffende Nut ist vorzugsweise an einer in Laufrichtung der bewegten Fläche betrachtet hinteren Stirnseite des Dichtelements vorgesehen.To form the joint, the strip may in particular be provided with an engagement section which engages in a groove provided in the sealing element. The relevant groove is preferably at one in the running direction the moving surface considered rear end face of the sealing element provided.

Das Dichtelement kann allgemein in Laufrichtung der bewegten Fläche betrachtet zwischen der Leiste und einem insbesondere einem Träger oder dergleichen zugeordneten Anschlag angeordnet sein. Dabei ist die dem Anschlag zugewandte vordere Stirnfläche des Dichtelements vorzugsweise konvex gekrümmt, um gegebenenfalls ein ungehindertes Verschwenken des Dichtelements zu ermöglichen.The sealing element can generally be arranged in the running direction of the moving surface between the strip and a particular carrier or the like associated stop. In this case, the front end face of the sealing element facing the stop is preferably convexly curved in order, if appropriate, to allow unhindered pivoting of the sealing element.

Gemäß einer bevorzugten praktischen Ausführungsform der erfindungsgemäßen Dichtungseinrichtung umfasst das Dichtelement einen Belüftungsansatz, der sich in Laufrichtung der bewegten Fläche vom dichtend mit dieser Fläche zusammenwirkenden Ende des Dichtelements wegerstreckt, um in einem sich an den Dichtbereich anschließenden Belüftungsbereich für eine Belüftung insbesondere von in der bewegten Fläche vorgesehenen Öffnungen zu sorgen. Dabei bildet der Belüftungsansatz mit der bewegten Fläche vorzugsweise einen sich in deren Laufrichtung erweiternden Spalt.According to a preferred practical embodiment of the sealing device according to the invention, the sealing element comprises a ventilation lug which extends in the running direction of the moving surface from sealingly cooperating with this surface end of the sealing element, in a subsequent to the sealing area ventilation area for ventilation in particular of the moving surface provided openings. In this case, the ventilation approach with the moving surface preferably forms a widening in the direction of travel gap.

Das Dichtelement ist zum Anlegen an die bewegte Fläche vorzugsweise im Bereich seines dichtend mit dieser Fläche zusammenwirkenden Endes entsprechend beaufschlagbar. Dabei kann das Dichtelement im Bereich seines dichtend mit der bewegten Fläche zusammenwirkenden Endes einen sich allgemein von der bewegten Fläche weg erstreckende Ansatz aufweisen und über diesen Ansatz entsprechend beaufschlagbar sein.The sealing element is preferably acted upon for application to the moving surface in the region of its sealingly cooperating with this surface end. In this case, in the region of its sealing end cooperating with the moving surface, the sealing element may have a projection which extends generally away from the moving surface and may be acted upon correspondingly via this approach.

Bei einer zweckmäßigen praktischen Ausführungsform ist das Dichtelement zum Anlegen an die bewegte Fläche beispielsweise über wenigstens einen Druckschlauch oder dergleichen entsprechend beaufschlagbar.In a practical practical embodiment, the sealing element for applying to the moving surface, for example, via at least one pressure hose or the like acted upon accordingly.

Auch zum Verstellen der Leiste kann z.B. wenigstens ein Druckschlauch vorgesehen sein.Also for adjusting the bar, e.g. be provided at least one pressure hose.

Von Vorteil ist insbesondere auch, wenn die Leiste mehrteilig, insbesondere zweiteilig, ausgeführt ist und die Leistenteile relativ zueinander um einen definierten Betrag verstellbar, insbesondere verschiebbar, sind. Dabei kann die mehrteilige Leiste zunächst im auseinander gezogenen Zustand soweit verstellbar sein, dass der Belüftungsansatz des Dichtelements an der bewegten Fläche anliegt. Das Dichtelement kann über die Leiste insbesondere auch so beaufschlagbar sein, dass der Belüftungsansatz an die bewegte Fläche angepresst wird. Die betreffende Fläche des Belüftungsansatzes wird hierbei entsprechend gereinigt und "nachgeschliffen".It is particularly advantageous if the strip is made of several parts, in particular two parts, and the strip parts relative to each other by a defined amount adjustable, in particular displaceable, are. In this case, the multi-part bar can initially be adjusted in the extended state so far that the ventilation approach of the sealing element bears against the moving surface. The sealing element can also be acted upon via the strip in particular so that the ventilation approach is pressed against the moving surface. The relevant surface of the ventilation approach is hereby cleaned accordingly and "reground".

Bei einer bevorzugten praktischen Ausführungsform der erfindungsgemäßen Dichtungseinrichtung umfasst die Leiste zwei um einen vorgebbaren Hub relativ zueinander verstellbare, insbesondere verschiebbare, Leistenteile, wobei der das Gelenk bzw. den Eingriffsabschnitt aufweisende Leistenteil nach erfolgtem Fixieren des anderen Leistenteils entsprechend dem vorgebbaren Hub wieder zurückziehbar ist, um den Belüftungsansatz wieder von der bewegten Fläche abzuheben. Dabei entspricht der begrenzte Hub vorzugsweise dem Abstand der in Laufrichtung der bewegten Fläche hinteren Kante des Dichtelements von der bewegten Fläche.In a preferred practical embodiment of the sealing device according to the invention, the bar comprises two adjustable by a predetermined stroke relative to each other, in particular displaceable, strip parts, wherein the joint or the engaging portion having strip part after successful fixation of the other strip part according to the predetermined stroke is retractable again lift the ventilation approach again from the moving surface. In this case, the limited stroke preferably corresponds to the distance of the rear edge of the sealing element from the moving surface in the direction of travel of the moving surface.

Der das Gelenk bzw. den Eingriffsabschnitt aufweisende Leistenteil kann insbesondere federnd in seine zurückgezogene Position belastet sein.The strip part or the engagement portion having strip part may be particularly resiliently loaded in its retracted position.

Vorteilhafterweise ist der das Gelenk bzw. den Eingriffsabschnitt aufweisende Leistenteil über wenigstens einen Druckschlauch in seine ausgezogene Position beaufschlagbar.Advantageously, the strip part or the engagement portion having strip portion is acted upon via at least one pressure hose in its extended position.

Der andere Leistenteil ist vorzugsweise über eine Klemmeinrichtung in seiner jeweiligen Lage fixierbar. Die Klemmeinrichtung kann beispielsweise einen Kolben und/oder wenigstens einen Druckschlauch umfassen.The other strip part is preferably fixable via a clamping device in its respective position. The clamping device may comprise, for example, a piston and / or at least one pressure hose.

Von Vorteil ist insbesondere auch, wenn das Dichtelement über eine Klemmeinrichtung in seiner jeweiligen Schwenklage fixierbar ist. Auch in diesem Fall kann die Klemmeinrichtung beispielsweise wieder wenigstens einen Kolben und/oder wenigstens einen Druckschlauch umfassen.It is also particularly advantageous if the sealing element can be fixed in its respective pivot position via a clamping device. Also in this case, the clamping device may, for example, again comprise at least one piston and / or at least one pressure hose.

Gemäß einer bevorzugten praktischen Ausführungsform ist die Klemmeinrichtung so ausgeführt, dass sich das Dichtelement bei einer Beaufschlagung des Kolbens bzw. Druckschlauches von der bewegten Fläche löst, wodurch der Verschleiß entsprechend verringert wird.According to a preferred practical embodiment, the clamping device is designed so that the sealing element dissolves when the piston or pressure hose from the moving surface, whereby the wear is reduced accordingly.

Gemäß einer zweckmäßigen praktischen Ausführungsform kann ein in einem jeweiligen Abstand zur bewegten Fläche fixierbares und die Anlegebewegung des Dichtelements begrenzendes Anschlagselement vorgesehen sein.According to an expedient practical embodiment, a stop element which can be fixed at a respective distance from the moving surface and which limits the application movement of the sealing element can be provided.

Das Anschlagselement ist vorzugsweise über eine Klemmeinrichtung in seiner jeweiligen Position fixierbar. Die Klemmeinrichtung kann beispielsweise wieder wenigstens einen Kolben und/oder wenigstens einen Druckschlauch umfassen.The stop element is preferably fixable via a clamping device in its respective position. For example, the clamping device may again comprise at least one piston and / or at least one pressure hose.

Vorteilhafterweise ist das Anschlagselement über z.B. wenigstens einen Druckschlauch unter Mitnahme des Dichtelements zumindest wieder soweit zurückziehbar, dass sich das Dichtelement von der bewegten Fläche löst.Advantageously, the stop element, for example, at least one pressure hose with entrainment of the sealing element at least again as far as retractable, that the sealing element separates from the moving surface.

Gemäß einer anderen zweckmäßigen Ausführungsform der erfindungsgemäßen Dichtungseinrichtung ist die Klemmeinrichtung so ausgeführt, dass das Anschlagselement bei einer Beaufschlagung des Kolbens bzw. Druckschlauches unter Mitnahme des Dichtelements zumindest wieder soweit zurückgezogen wird, dass sich das Dichtelement von der bewegten Fläche löst.According to another expedient embodiment of the sealing device according to the invention, the clamping device is designed so that the stop element is at least again pulled back so far when the piston or pressure hose under the entrainment of the sealing element that the sealing element detaches from the moving surface.

Die Dichtungseinrichtung kann insbesondere zur seitlichen Abdichtung wenigstens einer an die Innen- oder Außenwand eines rotierenden Mantels einer Saug- oder Blaswalze oder an ein bewegtes Band angrenzenden Druckzone eingesetzt werden.The sealing device can be used in particular for the lateral sealing of at least one pressure zone adjacent to the inner or outer wall of a rotating jacket of a suction or blower roll or to a moving belt.

Grundsätzlich ist beispielsweise auch eine Verwendung zwischen einem Saug- oder Blaskasten und dem rotierenden Mantel einer Saug- oder Blaswalze oder einem bewegten Band denkbar.In principle, for example, a use between a suction or blow box and the rotating jacket of a suction or blower roll or a moving belt is conceivable.

Das Dichtelement kann insbesondere auch als eine sich zumindest im wesentlichen über die gesamte Walzenlänge erstreckende Dichtleiste ausgebildet sein.The sealing element can in particular also be designed as a sealing strip extending at least substantially over the entire length of the roll.

Die Erfindung wird im folgenden anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnung näher erläutert; in dieser zeigen:

Figur 1
eine schematische, teilweise geschnittene Darstellung einer ersten beispielhaften Ausführungsform einer Dichtungseinrichtung mit einem über ein Gelenk verschwenkbaren Dichtelement, wobei das Gelenk allgemein auf die bewegte Fläche zu und von dieser weg verstellbar und in seiner jeweiligen Position fixierbar ist,
Figur 2
eine schematische, teilweise geschnittene Darstellung einer weiteren Ausführungsform der Dichtungseinrichtung, bei der das Gelenk an einer verstellbaren und in ihrer jeweiligen Position fixierbaren Leiste vorgesehen ist,
Figur 3
eine schematische, teilweise geschnittene Darstellung einer weiteren Ausführungsform der Dichtungseinrichtung mit einer zur Bildung des Gelenks vorgesehenen Leiste, die mit Distanzhaltern versehen ist,
Figur 4
eine schematische, teilweise geschnittene Darstellung einer weiteren Ausführungsform der Dichtungseinrichtung mit einer zur Bildung des Gelenks vorgesehenen zweiteiligen Leiste,
Figur 5
eine schematische, teilweise geschnittene Darstellung einer weiteren Ausführungsform der Dichtungseinrichtung, bei der das Dichtelement über eine Klemmeinrichtung in seiner Schwenklage fixierbar ist,
Figur 6
eines schematische, teilweise geschnittene Darstellung einer weiteren Ausführungsform der Dichtungseinrichtung mit einem die Anlagebewegung des Dichtelements begrenzenden verstellbaren Anschlagselement,
Figur 7
eine schematische, teilweise geschnittene Darstellung einer weiteren Ausführungsform der Dichtungseinrichtung mit einem die Anlagebewegung des Dichtelements begrenzenden verstellbaren Anschlagselement, das beim Fixieren einen Rückhub erfährt, und
Fig. 8-11
weitere Ausführungsformen der verstellbaren Leiste mit zugeordneter Klemmeinrichtung.
The invention is explained in more detail below with reference to embodiments with reference to the drawing; in this show:
FIG. 1
a schematic, partially sectioned view of a first exemplary embodiment of a sealing device with a pivotable about a hinge sealing element, wherein the joint is generally on the moving surface is adjustable to and from this away and fixable in its respective position,
FIG. 2
a schematic, partially sectioned view of another embodiment of the sealing device, in which the joint is provided on an adjustable and fixable in their respective position bar,
FIG. 3
a schematic, partially sectioned view of another embodiment of the sealing device with a provided for forming the hinge bar, which is provided with spacers,
FIG. 4
2 is a schematic, partially sectioned illustration of a further embodiment of the sealing device with a two-part strip provided for forming the joint,
FIG. 5
a schematic, partially sectioned view of another embodiment of the sealing device, wherein the sealing element is fixable via a clamping device in its pivotal position,
FIG. 6
a schematic, partially sectioned view of another embodiment of the sealing device with an attachment movement of the sealing element limiting adjustable stop element,
FIG. 7
a schematic, partially sectioned view of another embodiment of the sealing device with a limiting movement of the sealing element adjustable stop element, which undergoes a return stroke when fixing, and
Fig. 8-11
further embodiments of the adjustable bar with associated clamping device.

Figur 1 zeigt in schematischer, teilweise geschnittener Darstellung eine erste beispielhafte Ausführungsform einer Dichtungseinrichtung 10 zur seitlichen Abdichtung wenigstens einer an eine bewegte Fläche 12 angrenzenden Überdruck- oder Unterdruckzone in einer Papiermaschine.FIG. 1 shows, in a schematic, partially sectioned illustration, a first exemplary embodiment of a sealing device 10 for the lateral sealing of at least one overpressure or underpressure zone adjacent to a moving surface 12 in a paper machine.

Im vorliegenden Fall ist die Dichtungseinrichtung 10 innerhalb einer Saugwalze 14 angeordnet, um beispielsweise eine Druckzone P1 gegenüber der Umgebung abzudichten, in der ein höherer Druck P2 herrscht. Hier bildet also der mit Bohrungen 16 versehene Mantel 18 der Saugwalze 14 die bewegte Fläche 12. Über die Saugwalze 14 kann insbesondere eine zu entwässernde Papierbahn geführt sein. Grundsätzlich kann - insbesondere bei Verwendung der erfindungsgemäßen Dichtungseinrichtung in Verbindung mit einem einer Blaswalze zugeordneten Blaskasten - der Umgebungsdruck P2 auch kleiner sein als der beispielsweise im Innern eines Saugkastens erzeugte Druck P1.In the present case, the sealing device 10 is disposed within a suction roll 14, for example, to seal a pressure zone P 1 from the environment in which a higher pressure P 2 prevails. Here, therefore, provided with holes 16 jacket 18 of the suction roller 14, the moving surface 12. About the suction roller 14 may be performed in particular a paper web to be dewatered. In principle, the ambient pressure P 2 can also be smaller than the pressure P 1 generated, for example, in the interior of a suction box, in particular when the sealing device according to the invention is used in conjunction with a blow box associated with a blowing roller.

Die Dichtungseinrichtung umfasst wenigstens ein der bewegten Fläche 12 gegenüberliegendes Dichtelement 20, das über ein Gelenk 22 schwenkbar gelagert und zum Anlegen an die bewegte Fläche 12 durch entsprechendes Verschwenken mit einer Anpresskraft FP beaufschlagbar ist, die im vorliegenden Fall beispielsweise durch einen sich vorzugsweise quer zur Laufrichtung L der bewegten Fläche 12 erstreckenden Druckschlauch 24 erzeugt wird.The sealing device comprises at least one of the moving surface 12 opposite sealing element 20 which is pivotally mounted via a hinge 22 and for applying to the moving surface 12 by appropriate pivoting with a contact pressure F P acted upon, in the present case, for example, by a preferably transversely to Running direction L of the moving surface 12 extending pressure hose 24 is generated.

Das Gelenk 22 ist insbesondere in Richtung der Anpresskraft FP allgemein auf die bewegte Fläche 12 zu und von dieser weg verstellbar und in seiner jeweiligen Position fixierbar. Anders ausgedrückt ist das Gelenk 22 und damit die durch dieses gebildete Schenkachse 26 in vorgebbarer Weise relativ zur bewegten Fläche 12, d.h. hier der Innenfläche der Saugwalze 14, positionierbar.The joint 22 is in particular in the direction of the contact pressure F P generally on the moving surface 12 to and away from this adjustable and fixable in its respective position. In other words, the articulation 22, and thus the pivot axis 26 formed by it, can be positioned in a predeterminable manner relative to the moving surface 12, ie in this case the inner surface of the suction roller 14.

Das Gelenk 22 ist an einem entsprechend positionierbaren Element 28 gebildet, bei dem es sich beispielsweise um eine Leiste oder dergleichen handeln kann. Die Verschieberichtung VR dieses verstellbaren Elements 28 ist entsprechend beispielsweise parallel zur Richtung der Anpresskraft FP.The hinge 22 is formed on a corresponding positionable element 28, which may be, for example, a bar or the like. The displacement direction V R of this adjustable element 28 is accordingly, for example, parallel to the direction of the contact pressure F P.

Die durch das Gelenk 22 definierte Schwenkachse 26 des Dichtelements 20 erstreckt sich quer zur Laufrichtung L der bewegten Fläche 12.The pivot axis 26 of the sealing element 20 defined by the joint 22 extends transversely to the running direction L of the moving surface 12.

Wie anhand der Figur 1 zu erkennen ist, kann das Element bzw. Leiste 28 zur Bildung des Gelenks mit einem Eingriffsabschnitt 30 versehen sein, der in eine in dem Dichtelement 20 vorgesehene Nut 32 eingreift. Die Nut 32 ist an einer in Laufrichtung L der bewegten Fläche 12 betrachtet hinteren Stirnseite 34 des Dichtelements 20 vorgesehen. Der Eingriffsabschnitt 30 sowie die Nut 32 erstrecken sich quer zur Laufrichtung der bewegten Fläche 12, um die querverlaufende Schwenkachse 26 zu bilden.As can be seen with reference to FIG. 1, the element or strip 28 for forming the joint can be provided with an engagement section 30, which engages in a groove 32 provided in the sealing element 20. The groove 32 is provided on a viewed in the direction L of the moving surface 12 rear end face 34 of the sealing element 20. The engagement portion 30 and the groove 32 extend transversely to the direction of travel of the moving surface 12 to form the transverse pivot axis 26.

Wie anhand der Figur 1 zu erkennen ist, kann das Dichtelement 20 allgemein in Laufrichtung L der bewegten Fläche 12 betrachtet zwischen dem beispielsweise durch eine Leiste gebildeten verstellbaren Element 28 und einem insbesondere einem Träger 36 oder dergleichen zugeordneten Anschlag 38 angeordnet sein. Dabei ist die dem Anschlag 38 zugewandte vordere Stirnfläche 40 des Dichtelements 20 vorzugsweise konvex gekrümmt, um gegebenenfalls ein ungehindertes Verschwenken des Dichtelements 20 zu ermöglichen.As can be seen with reference to FIG. 1, the sealing element 20 can generally be arranged in the running direction L of the moving surface 12 between the adjustable element 28 formed for example by a strip and a stop 38 associated in particular with a carrier 36 or the like. In this case, the stop 38 facing the front end face 40 of the sealing element 20 is preferably curved convex, to allow an unhindered pivoting of the sealing element 20, if necessary.

Das Dichtelement 20 ist mit einem Belüftungsansatz 42 versehen, der sich in Laufrichtung L der bewegten Fläche 12 vom dichtend mit dieser Fläche 12 zusammenwirkenden Ende 44 des Dichtelements 20 weg erstreckt, um in einem sich an den Dichtbereich 46 anschließenden Belüftungsbereich 48 für eine Belüftung der in der bewegten Fläche 12 vorgesehenen Öffnungen oder Bohrungen 16 zu sorgen. Dabei bildet der Belüftungsansatz 42 mit der bewegten Fläche 12 einen sich in deren Laufrichtung L erweiternden Spalt 50.The sealing element 20 is provided with a ventilation lug 42 extending in the direction L of the moving surface 12 from sealingly cooperating with this surface 12 end 44 of the sealing member 20 away, in a subsequent to the sealing region 46 ventilation area 48 for ventilation of in the moving surface 12 provided openings or holes 16 to provide. In this case, the ventilation projection 42 forms, with the moving surface 12, a gap 50 widening in its running direction L.

Wie bereits erwähnt ist das Dichtelemente 20 zum Anlegen an die bewegte Fläche 12 im Bereich eines dichtend mit dieser Fläche 12 zusammenwirkenden Endes 44 beispielsweise durch wenigstens einen sich in Querrichtung erstreckenden Druckschlauch 24 entsprechend beaufschlagbar. Dabei ist das Dichtelement 20 im Bereich seines dichtenden Endes 44 mit einem sich allgemein von der bewegten Fläche 44 wegerstreckenden Ansatz 52 versehen und über diesen Ansatz 52 entsprechend beispielsweise durch den Druckschlauch 24 beaufschlagbar.As already mentioned, the sealing elements 20 for applying to the moving surface 12 in the region of an end 44 cooperating sealingly with this surface 12, for example, by at least one extending in the transverse direction pressure hose 24 can be acted upon accordingly. In this case, the sealing element 20 is provided in the region of its sealing end 44 with a generally extending away from the moving surface 44 approach 52 and 52 via this approach, for example, by the pressure hose 24 acted upon.

Das Dichtelement 20 kann insbesondere als eine sich quer zur Laufrichtung L der bewegten Fläche 12 und insbesondere als eine sich zumindest im wesentlichen über die gesamte Länge der Saugwalze 14 erstreckende Dichtleiste ausgebildet sein.The sealing element 20 may in particular be designed as a sealing strip extending transversely to the running direction L of the moving surface 12 and in particular as a sealing strip extending at least substantially over the entire length of the suction roll 14.

Der Druckschlauch 24 kann beispielsweise zwischen dem Träger 36 und dem Ansatz 52 des Dichtelements 20 angeordnet sein.The pressure hose 24 may be arranged, for example, between the carrier 36 and the projection 52 of the sealing element 20.

Figur 2 zeigt in schematischer, teilweise geschnittener Darstellung eine weitere Ausführungsform der Dichtungseinrichtung 10, bei der das Gelenk 22 an einer verstellbaren und in ihrer jeweiligen Position fixierbaren Leiste 28 vorgesehen ist. Die Leiste 28 erstreckt sich wieder quer zur Laufrichtung L der bewegten Fläche 12.FIG. 2 shows, in a schematic, partially sectioned illustration, a further embodiment of the sealing device 10, in which the joint 22 is provided on an adjustable bar 28 which can be fixed in its respective position. The strip 28 extends again transversely to the direction L of the moving surface 12th

Die Leiste 28 ist auch im vorliegenden Fall beispielsweise wieder in Richtung der Anpresskraft FP beweglich. In ihrer jeweiligen Position ist die Leiste 28 an einem Träger 36 fixierbar. Es kann sich beispielsweise um denselben Träger 36 handeln, an dem auch der Anschlag 38 vorgesehen ist.The strip 28 is also in the present case, for example, again in the direction of the contact force F P movable. In its respective position, the strip 28 can be fixed to a carrier 36. It may be, for example, the same carrier 36, on which the stop 38 is provided.

Wie anhand der Figur 2 zu erkennen ist, ist die Leiste über eine Klemmeinrichtung 54 in ihrer jeweiligen Lege fixierbar. Die Klemmeinrichtung 54 kann wenigstens einen Kolben 56 und/oder wenigstens einen Druckschlauch 58 umfassen. Im vorliegenden Fall ist ein z.B. leistenartiger Kolben 56 vorgesehen, der durch einen sich beispielsweise in Querrichtung erstreckenden Druckschlauch 58 gegen die Leiste 28 gepresst wird, um diese zwischen dem Kolben 56 und einer Gegenfläche 60, die beispielsweise wieder am Träger 36 vorgesehen sein kann, einzuklemmen.As can be seen with reference to FIG. 2, the strip can be fixed in its respective position via a clamping device 54. The clamping device 54 may comprise at least one piston 56 and / or at least one pressure hose 58. In the present case, an e.g. strip-like piston 56 is provided, which is pressed by a, for example, in the transverse direction extending pressure hose 58 against the bar 28 to clamp this between the piston 56 and a counter-surface 60, which may be provided again for example on the carrier 36.

Die Leiste 28 ist in Anpressrichtung beispielsweise durch wenigstens einen Druckschlauch 62 entsprechend verstellbar. Sobald die Leiste 28 beispielsweise über den Druckschlauch 62 in der gewünschten Weise verstellt ist, kann die Klemmeinrichtung 54 aktiviert werden, um die Leiste 28 in der betreffenden Position durch Klemmung zu fixieren.The strip 28 is correspondingly adjustable in the pressing direction, for example by at least one pressure hose 62. Once the bar 28 is adjusted, for example via the pressure hose 62 in the desired manner, the clamping device 54 can be activated to fix the bar 28 in the relevant position by clamping.

Im übrigen kann diese Dichtungseinrichtung 10 zumindest im wesentlichen insbesondere wieder so ausgeführt sein wie die der Figur 1. Einander entsprechenden Teilen sind gleiche Bezugszeichen zugeordnet.Moreover, this sealing device 10 may at least substantially in particular again be designed as that of Figure 1. Parts corresponding to each other are assigned the same reference numerals.

Figur 3 zeigt in schematischer, teilweise geschnittener Darstellung eine weitere Ausführungsform der Dichtungseinrichtung 10 mit einer zur Bildung des Gelenks 22 vorgesehenen Leiste 28.FIG. 3 shows, in a schematic, partially sectioned illustration, a further embodiment of the sealing device 10 with a strip 28 provided for forming the joint 22.

Im vorliegenden Fall ist die Leiste 28 lediglich beispielsweise mit Distanzhaltern 64 versehen und beispielsweise wieder durch wenigstens einen Druckschlauch 62 in eine Endposition verstellbar, in der diese Distanzhalter 64 an der bewegten Fläche 12 anliegen und damit eine vorgebbare Position des Gelenks 22 relativ zur bewegten Fläche 12 definieren. Dabei sind vorzugsweise mehrere quer zur Laufrichtung L über die bewegte Fläche 12 verteilte Distanzhalter 64 vorgesehen. Zur Definition der Gelenkposition können also mehrere in Breitenrichtung verteilte Distanzhalter 64 in Form von Noppen vorgesehen sein. Diese können beispielsweise durch Noppen, Rollen und/oder dergleichen gebildet sein. Beispiele möglicher Querschnittsformern solcher Distanzhalter 64 sind im unteren Teil der Figur 3 wiedergegeben. So können diese Distanzhalter 64 beispielsweise einen rechteckigen Querschnitt a), einen dreieckförmigen Querschnitt b), einen ovalen Querschnitt c) usw. besitzen.In the present case, the strip 28 is merely provided, for example, with spacers 64 and, for example, adjustable again by at least one pressure hose 62 into an end position in which these spacers 64 abut the moving surface 12 and thus a predefinable position of the joint 22 relative to the moving surface 12 define. In this case, a plurality of spacers distributed transversely to the running direction L over the moving surface 12 are preferably provided. To define the joint position, a plurality of spacers 64 distributed in the width direction can thus be provided in the form of nubs. These can be formed for example by nubs, rollers and / or the like. Examples of possible cross-sectional formers of such spacers 64 are shown in the lower part of FIG. For example, these spacers 64 may have a rectangular cross section a), a triangular cross section b), an oval cross section c), etc.

Insbesondere beim Fixieren der Leiste 28 können die Distanzhalter 64 durch einen vorgebbaren Rückhub wieder von der bewegten Fläche 12 abgehoben werden.In particular, when fixing the bar 28, the spacers 64 can be lifted by a predetermined return stroke again from the moving surface 12.

Dazu kann beispielsweise die Klemmeinrichtung 54 so ausgeführt sein, dass die Leiste 28 bei einer Beaufschlagung des Kolbens 56 bzw. des Druckschlauches 58 ein Stück nach unten bewegt und entsprechend die Distanzhalter 64 von der bewegten Fläche 12 abgehoben werden. Wie anhand der Figur 3 zu erkennen ist, sind dazu der Kolben 56 sowie der Druckschlauch 58 in einer hier beispielsweise gegenüber der Horizontalen entsprechend geneigten Führung 66 angeordnet. Der Kolben 56 kann beispielsweise wieder durch eine sich quer zur Laufrichtung L der bewegten Fläche 12 erstreckende Zwischenleiste gebildet sein. Auf der anderen Seite der Leiste 28 kann beispielsweise eine weitere Zwischenleiste 68 vorgesehen sein, die ebenfalls wieder in einer schräg verlaufenden Führung 69 angeordnet sein kann. Die beiden Führungen 66, 69 können beispielsweise wieder in dem Träger 36 vorgesehen sein. Zwischen der Leiste 68 und dem Träger 36 können ebenfalls wieder Druckschläuche 70 wie z.B. O-Ringbänder aus Silikon oder dergleichen angeordnet sein, die im vorliegenden Fall jedoch einen deutlich kleineren Querschnitt besitzen als der Druckschlauch 58.For this purpose, for example, the clamping device 54 may be designed so that the bar 28 moves at a loading of the piston 56 and the pressure hose 58 a piece down and accordingly the spacers 64 are lifted from the moving surface 12. As can be seen with reference to FIG. 3, the piston 56 and the pressure hose 58 are in this case, for example, with respect to the horizontal arranged according to inclined guide 66. For example, the piston 56 may again be formed by an intermediate strip extending transversely to the running direction L of the moving surface 12. On the other side of the strip 28, for example, a further intermediate strip 68 may be provided, which may also be arranged again in an inclined guide 69. The two guides 66, 69 may for example be provided again in the carrier 36. Between the strip 68 and the carrier 36, pressure hoses 70, such as, for example, O-ring bands made of silicone or the like may also be arranged, which in the present case, however, have a significantly smaller cross section than the pressure tube 58.

Diese einen entsprechenden Rückhub bewirkende Klemmeinrichtung 54 kann allgemein insbesondere auch so ausgeführt sein, wie dies in der US-A- 5 580 424 beschrieben ist.This clamping device 54, which effects a corresponding return stroke, can in general also be designed in particular as described in US Pat US-A-5 580 424 is described.

Im übrigen kann die Dichtungseinrichtung 10 insbesondere zumindest im wesentlichen wieder so ausgeführt sein wie die gemäß Figur 1. Einander entsprechenden Teilen sind gleiche Bezugszeichen zugeordnet.Moreover, the sealing device 10 may in particular be embodied at least substantially again as in accordance with FIG. 1. Mutually corresponding parts are assigned the same reference numerals.

Es versteht sich von selbst, dass Distanzhalter nicht zwingend sind und ein kleiner Spalt auch anderweitig erzielt werden kann.It goes without saying that spacers are not mandatory and a small gap can also be achieved elsewhere.

Figur 4 zeigt in schematischer, teilweise geschnittener Darstellung eine weitere Ausführungsform der Dichtungseinrichtung 10 mit einer zur Bildung des Gelenks 22 vorgesehenen Leiste 28.FIG. 4 shows, in a schematic, partially sectioned illustration, a further embodiment of the sealing device 10 with a strip 28 provided for forming the joint 22.

Im vorliegenden Fall ist diese Leiste 28 zweiteilig ausgeführt, wobei die beiden Leistenteile 28', 28" insbesondere in Richtung der Anpresskraft FP relativ zueinander um einen definierten Betrag a verstellbar, insbesondere verschiebbar, sind, der vorzugsweise dem während des normalen Betriebs vorgesehenen Abstand aD der in Laufrichtung L hinteren Kante 72 von der bewegten Fläche 12 entspricht.In the present case, this strip 28 is designed in two parts, wherein the two strip parts 28 ', 28 "in particular in the direction of the contact pressure F P relative to each other by a defined amount a adjustable, in particular slidably, which preferably corresponds to the distance a D provided during normal operation of the rear edge 72 in the running direction L of the moving surface 12.

Die zweiteilige Leiste 28 ist zunächst im auseinander gezogenen Zustand z.B. über wenigstens einen Druckschlauch 62 soweit zur bewegten Fläche 12 hin verstellbar, dass der Belüftungsansatz 42 des Dichtelements 20 bzw. dessen hintere Kante 72 an der bewegten Fläche 12 anliegt (siehe gestrichelte Darstellung des Dichtelements). Dabei ist das Dichtelement 20 über die Leiste 28 insbesondere so beaufschlagbar, dass der Belüftungsansatz 42 an die bewegte Fläche 12 angepresst wird.The two-part bar 28 is initially in the extended state, e.g. via at least one pressure hose 62 as far as the moving surface 12 adjustable that the ventilation lug 42 of the sealing element 20 and the rear edge 72 rests against the moving surface 12 (see dashed line illustration of the sealing element). In this case, the sealing element 20 via the bar 28 in particular so acted upon that the ventilation lug 42 is pressed against the moving surface 12.

Die beiden Leistenteile 28', 28" sind also um den vorgebbaren Hub a relativ zueinander so verstellbar, dass die hintere Kante 72 des Dichtelements 20 an die bewegte Fläche 12 anlegbar bzw. anschließend beispielsweise nach erfolgtem Fixieren des äußeren Leistenteils 28" um den vorgebbaren Hub a wieder von der bewegten Fläche 12 abhebbar ist. Der das Gelenk 22 bzw. den Eingriffsabschnitt 30 aufweisende Leistenteil 28' ist mit seinem gegenüberliegenden Ende innerhalb des äußeren Leistenteils 28" angeordnet und in diesem geführt.The two strip parts 28 ', 28 "are so relative to each other by the predetermined stroke a so adjustable that the rear edge 72 of the sealing member 20 can be applied to the moving surface 12 and then, for example, after the fixing of the outer rail part 28" by the predetermined stroke a is again lifted from the moving surface 12. The strip part 22 'having the joint 22 or the engagement section 30 is arranged with its opposite end inside the outer strip part 28 "and guided therein.

Der das Gelenk 22 bzw. den Eingriffsabschnitt 30 aufweisende Leistenteil 28' ist z.B. über eine oder mehrere Druckfedern 74 federnd in seine in der Figur 4 mit durchgezogenen Linien dargestellte zurückgezogene Position belastet.The strip part 28 'comprising the joint 22 or the engagement section 30 is e.g. via one or more compression springs 74 resiliently loaded in its retracted position shown in Figure 4 by solid lines.

Beispielsweise über wenigstens einen Druckschlauch 76 kann der das Gelenk 22 bzw. den Eingriffsabschnitt 30 aufweisende Leistenteil 28' entgegen der Federkraft in seine ausgezogen Position (gestrichelte Darstellung) beaufschlagt werden.For example, via at least one pressure hose 76 of the joint 22 and the engaging portion 30 having strip portion 28 'against the spring force in its extended position (dashed line) be charged.

Der äußere Leistenteil 28' ist beispielsweise wieder über eine solche Klemmeinrichtung 54, wie sie im Zusammenhang mit der Ausführung gemäß der Figur 2 beschrieben wurde, in seiner jeweiligen Lage fixierbar. Die Klemmeinrichtung 54 kann also beispielsweise wieder wenigstens einen Kolben 56 und/oder wenigstens einen Druckschlauch 58 umfassen, um das äußere Leistenteil 28" beispielsweise zwischen dem insbesondere leistenartigen Kolben 56 und einer Gegenfläche 60 festzuklemmen.The outer strip part 28 'is, for example, again fixable in its respective position via such a clamping device 54 as has been described in connection with the embodiment according to FIG. The clamping device 54 may thus comprise, for example, again at least one piston 56 and / or at least one pressure hose 58, in order to clamp the outer strip part 28 ", for example between the particular strip-like piston 56 and a counter-surface 60.

Die zweiteilige Leiste 28 wird im vorliegenden Fall also beispielsweise über den Druckschlauch 76 auseinander geschoben und beispielsweise über den Druckschlauch 62 insgesamt in Richtung der bewegten Fläche 12 bewegt, bis das Dichtelement 20 mit der hinteren Kante 72 an der bewegten Fläche 12 anliegt. Das äußere Leistenteil 28" wird über die Klemmeinrichtung 54 fixiert, und der innere Leistenteil 28' wird entsprechend dem vorgebbaren definierten Hub a entgegen der Anpressrichtung FP verschoben. Der begrenzte Hub a entspricht dem sich während des Betriebs ergebenden Abstand aD der hinteren Kante 72 von der bewegten Fläche 12, der über die Breite insbesondere konstant ist.The two-part bar 28 is thus pushed apart in the present case, for example via the pressure hose 76 and, for example via the pressure hose 62 in the direction of the moving surface 12 moves until the sealing element 20 rests with the rear edge 72 on the moving surface 12. The outer strip part 28 "is fixed by means of the clamping device 54, and the inner strip part 28 'is displaced counter to the pressing direction F P in accordance with the predefined defined stroke a The limited stroke a corresponds to the distance a D of the rear edge 72 resulting during operation from the moving surface 12, which is in particular constant over the width.

Im übrigen kann diese Dichtungseinrichtung insbesondere zumindest im wesentlichen wieder den gleichen Aufbau wie die gemäß Figur 2 besitzen. Einander entsprechenden Teilen sind gleiche Bezugszeichen zugeordnet.Moreover, this sealing device may in particular at least substantially again have the same structure as that according to FIG. Corresponding parts are assigned the same reference numerals.

Figur 5 zeigt in schematischer, teilweise geschnittener Darstellung eine weitere Ausführungsform der Dichtungseinrichtung 10, bei der das Dichtelement 20 über eine Klemmeinrichtung 78 in seiner jeweiligen Schwenklage fixierbar ist.FIG. 5 shows, in a schematic, partially sectioned illustration, a further embodiment of the sealing device 10, in which the sealing element 20 can be fixed in its respective pivoting position via a clamping device 78.

Die Klemmeinrichtung 78 kann insbesondere wieder wenigstens einen Kolben 80 und/oder wenigstens einen Druckschlauch 82 umfassen. Der Kolben 80 kann insbesondere wieder leistenartig ausgeführt sein und sich quer zur Laufrichtung L der bewegten Fläche 20 erstrecken. Auch der Druckschlauch 82 erstreckt sich insbesondere wieder in Querrichtung.The clamping device 78 may in particular comprise at least one piston 80 and / or at least one pressure hose 82 again. The piston 80 may in particular be designed like a strip again and extend transversely to the direction L of the moving surface 20. Also, the pressure hose 82 extends in particular again in the transverse direction.

Grundsätzlich könnte die betreffende Klemmeinrichtung insbesondere auch so ausgeführt sein, dass sich das Dichtelement 20 bei einer Beaufschlagung des Kolbens bzw. Druckschlauches von der bewegten Fläche 12 löst.In principle, the clamping device in question could in particular also be designed so that the sealing element 20 is released from the moving surface 12 when the piston or pressure hose is acted on.

Im übrigen kann diese Ausführungsform insbesondere zumindest im wesentlichen wieder den gleichen Aufbau wie die zuvor beschriebenen Ausführungsformen besitzen. Einander entsprechenden Teilen sind gleiche Bezugszeichen zugeordnet.Moreover, this embodiment may in particular at least substantially have the same structure as the embodiments described above again. Corresponding parts are assigned the same reference numerals.

Figur 6 zeigt in schematischer, teilweise geschnittener Darstellung eine weitere Ausführungsform der Dichtungseinrichtung 10.FIG. 6 shows a schematic, partially sectioned illustration of a further embodiment of the sealing device 10.

Im vorliegenden Fall ist ein in einem jeweiligen Abstand zur bewegten Fläche 12 fixierbares und die Anlegebewegung des Dichtelements 20 begrenzendes Anschlagselement 84 vorgesehen. Wie anhand der Figur 6 zu erkennen ist, umfasst dieses Anschlagselement 84 einen Eingriffsabschnitt 86, der mit Spiel in eine in der vorderen Stirnseite 40 des Dichtelements 20 vorgesehene Nut 88 eingreift.In the present case, a stop element 84 which can be fixed at a respective distance from the moving surface 12 and which limits the application movement of the sealing element 20 is provided. As can be seen with reference to FIG. 6, this stop element 84 comprises an engagement section 86 which engages with play in a groove 88 provided in the front end face 40 of the sealing element 20.

Das Anschlagselement 84 ist im vorliegenden Fall über eine Klemmeinrichtung 90 in seiner jeweiligen Position fixierbar. Die Klemmeinrichtung 90 kann beispielsweise wieder wenigstens einen Kolben 92 und/oder wenigstens einen Druckschlauch 94 umfassen. Der Kolben 92 kann beispielsweise wieder als leistenartiges, sich quer zur Laufrichtung L der bewegten Fläche 12 erstreckendes Element ausgeführt sein. Auch der Druckschlauch 94 erstreckt sich vorzugsweise wieder in Querrichtung.The stop element 84 can be fixed in the present case via a clamping device 90 in its respective position. The clamping device 90 may, for example, again comprise at least one piston 92 and / or at least one pressure hose 94. For example, the piston 92 may again as a strip-like, be executed transversely to the direction L of the moving surface 12 extending element. Also, the pressure hose 94 preferably extends again in the transverse direction.

Beispielsweise durch wenigstens einen Druckschlauch 96 kann das Anschlagselement 84 unter Mitnahem des zuvor über den Druckschlauch 24 an die bewegte Fläche 12 angelegten Dichtelements 20 unter Mitnahme dieses Dichtelements 20 zumindest wieder soweit zurückgezogen werden, dass sich das Dichtelement 20 wieder von der bewegten Fläche 12 löst.For example, by at least one pressure hose 96, the stop element 84 can be at least again pulled back to the extent that the sealing element 20 is released again from the moving surface 12 while taking the previously applied via the pressure hose 24 to the moving surface 12 sealing member 20 with entrainment of this sealing element 20.

Im übrigen kann diese Ausführungsform insbesondere zumindest im wesentlichen wieder einen solchen Aufbau besitzen wie die anhand der Figuren 1 bis 5 beschriebenen Ausführungsformen. Einander entsprechenden Teilen sind gleiche Bezugszeichen zugeordnet.Moreover, this embodiment can in particular at least substantially have such a structure as the embodiments described with reference to FIGS 1 to 5. Corresponding parts are assigned the same reference numerals.

Die Ausführungsform gemäß Figur 7 unterscheidet sich von der gemäß Figur 6 im wesentlichen dadurch aus, dass die Klemmeinrichtung 90 in vergleichbarer Weise wie die im Zusammenhang mit der Figur 3 beschriebene Klemmeinrichtung 54 ausgeführt ist. Im vorliegenden Fall wird durch die entsprechende Ausführung der Klemmeinrichtung 90 das Anschlagselement 84 also bei einer Beaufschlagung des Kolbens 92 bzw. Druckschlauches 94 unter Mitnahme des Dichtelements 20 zumindest wieder soweit zurückgezogen, dass sich das Dichtelement 20 von der bewegten Fläche 12 löst.The embodiment according to FIG. 7 differs from that according to FIG. 6 essentially in that the clamping device 90 is designed in a manner comparable to the clamping device 54 described in connection with FIG. In the present case, by the corresponding embodiment of the clamping device 90, the stop element 84 is thus at least again pulled back so far when the piston 92 or pressure hose 94 is entrained with the sealing element 20 that the sealing element 20 is released from the moving surface 12.

Beispielsweise durch ein Federblech 98 oder dergleichen kann das Anschlagselement federnd gegen den unteren Rand der Nut 88 belastet sein.For example, by a spring plate 98 or the like, the stop element may be resiliently loaded against the lower edge of the groove 88.

Im übrigen kann auch diese Ausführungsform zumindest im wesentlichen wieder so ausgeführt sein wie die zuvor beschriebenen Ausführungsformen. Einander entsprechenden Teilen sind gleiche Bezugszeichen zugeordnet.Incidentally, this embodiment can be at least substantially carried out again as the embodiments described above. Corresponding parts are assigned the same reference numerals.

Die Figuren 8 bis 11 zeigen in schematischer Teildarstellung weitere Ausführungsformen der verstellbaren Leiste 28 mit zugeordneter Klemmeinrichtung 54. Auch in den vorliegenden Fällen kann die jeweilige Klemmeinrichtung 54 beispielsweise wieder wenigstens einen Kolben 56 und/oder wenigstens einen Druckschlauch 58 umfassen. In den vorliegenden Fällen ist beispielsweise wieder ein leistenartiger Kolben 56 vorgesehen, der durch einen sich beispielsweise in Querrichtung erstreckenden Druckschlauch 58 gegen die Leiste 28 gepresst wird, um diese zwischen dem Kolben 56 und einer Gegenfläche 60 einzuklemmen, die beispielsweise wieder durch eine Zwischenleiste 68 (vgl. insbesondere die Figuren 8 und 9) gebildet oder an einem anderen Gegenelement (siehe z.B. die Figuren 10 und 11) bzw. am Träger vorgesehen sein kann.FIGS. 8 to 11 show, in a diagrammatic partial representation, further embodiments of the adjustable strip 28 with associated clamping device 54. In the present cases, the respective clamping device 54 may, for example, again comprise at least one piston 56 and / or at least one pressure hose 58. In the present cases, for example, again a strip-like piston 56 is provided, which is pressed by a, for example, in the transverse direction extending pressure hose 58 against the bar 28 to clamp them between the piston 56 and a mating surface 60, for example, again by an intermediate bar 68 (FIG. cf., in particular, FIGS. 8 and 9) or may be provided on another counter element (see eg FIGS. 10 and 11) or on the carrier.

Die Leiste 28 ist in Anpressrichtung beispielsweise wieder durch wenigstens einen Druckschlauch 62 entsprechend verstellbar (vgl. insbesondere die Figuren 8 und 11). Sobald die Leiste 28 beispielsweise über den Druckschlauch 62 in der gewünschten Weise verstellt ist, kann die Klemmeinrichtung 54 aktiviert werden, um die Leiste 28 in der gewünschten Position durch Klemmung zu fixieren.The strip 28 is correspondingly adjustable in the pressing direction, for example, again by at least one pressure hose 62 (cf., in particular, FIGS. 8 and 11). Once the bar 28 is adjusted, for example via the pressure hose 62 in the desired manner, the clamping device 54 can be activated to fix the bar 28 in the desired position by clamping.

In den vorliegenden Fällen ist die Klemmeinrichtung 54 ähnlich wie die der Figur 3 wieder so ausgeführt, dass die Leiste 28 bei einer Beaufschlagung des Kolbens 56 bzw. des Druckschlauches 58 ein Stück nach unten bewegt wird. Wie anhand der Figuren 8 und 11 zu erkennen ist, sind dazu der Kolben 56 sowie der Druckschlauch 58 wieder in einer hier beispielsweise gegenüber der Horizontalen entsprechend geneigten Führung 66 angeordnet. Der Kolben 56 kann beispielsweise wieder durch ein sich quer zur Laufrichtung L der bewegten Fläche 12 (siehe auch nochmals Figur 3) erstreckende Zwischenleiste gebildet sein. Auf der anderen Seite der Leiste 28 kann beispielsweise eine weitere Zwischenleiste 68 (vgl. insbesondere die Figuren 8 und 9) vorgesehen sein. Bei der Ausführungsform gemäß Figur 8 ist diese Zwischenleiste 68 auch wieder in einer schräg verlaufenden Führung 69 angeordnet. Eine solche schräg verlaufende Führung ist jedoch, wie beispielsweise die Figur 9 zeigt, nicht zwingend.In the present cases, the clamping device 54 is similar to that of Figure 3 again designed so that the bar 28 is moved at a loading of the piston 56 and the pressure hose 58 a piece down. As can be seen with reference to FIGS. 8 and 11, the piston 56 and the pressure hose 58 are again arranged in a guide 66 which is correspondingly inclined here, for example, relative to the horizontal. The piston 56, for example, again by a transversely be formed to the running direction L of the moving surface 12 (see also Figure 3 again) extending intermediate strip. On the other side of the strip 28, for example, a further intermediate strip 68 (cf., in particular, FIGS. 8 and 9) can be provided. In the embodiment according to FIG. 8, this intermediate strip 68 is also arranged again in an obliquely running guide 69. However, such an oblique guide, as shown for example in FIG. 9, is not mandatory.

Die Leiste 28 kann nun beispielsweise auf beiden oder nur auf einer Seite aufgeraut sein und/oder, im Extremfall, beispielsweise mit einem Sägezahnprofil 100 versehen sein, um die Reibung z.B. zwischen den Leisten 56, 68 entsprechend zu erhöhen und damit größere Winkel in der Führung zu erreichen. Das Sägezahnprofil kann auch auf die Leisten oder Führungen 56, 68 entsprechend aufgebracht werden (vgl. z.B. Figur 8). Dadurch lassen sich größere Mittel insbesondere zwischen der Bewegungsrichtung der Leisten 56, 58 und der Leiste 28 erreichen.The strip 28 can now be roughened, for example, on both sides or only on one side and / or, in the extreme case, for example, be provided with a sawtooth profile 100 in order to reduce the friction, e.g. between the strips 56, 68 to increase accordingly and thus to achieve larger angles in the guide. The sawtooth profile may also be applied to the ledges or guides 56, 68 (see, for example, Figure 8). As a result, larger means, in particular between the direction of movement of the strips 56, 58 and the bar 28 can be achieved.

Durch einen Ansatz 102 oder dergleichen wird verhindert, dass die Zähne sich einhaken.A lug 102 or the like prevents the teeth from getting caught.

Grundsätzlich ist auch denkbar, dass entweder die Führung bzw. Leiste 56 oder die Führung bzw. Leiste 68 wegfällt. Die Führung der Leiste 28 wird dann von der jeweils anderen Leiste bzw. Führung 68 bzw. 56 übernommen.In principle, it is also conceivable that either the guide or bar 56 or the guide or bar 68 is omitted. The leadership of the bar 28 is then taken over by the respective other bar or guide 68 and 56, respectively.

In den dargestellten Fällen dient beispielsweise der Kolben 56 nicht mehr als Führung. Die betreffende Führung ist hier also weggelassen worden. Die Leiste 28 muss entsprechend anders an die Führung angepresst werden, beispielsweise über ein elastisches, kompressibles Material 104 (vgl. z.B. Figur 9), Schläuche, Federn 106 (vgl. z.B. Figur 10) und/oder dergleichen.In the cases shown, for example, the piston 56 is no longer used as a guide. The relevant guide has therefore been omitted here. The strip 28 must be pressed against the guide differently, for example via an elastic, compressible material 104 (cf., for example, FIG. 9), hoses, springs 106 (cf., for example, FIG. 10) and / or the like.

Da unter anderem der Abstand aD eventuell relativ klein sein kann, ist es auch denkbar, die Distanz- oder Abstandshalter 64 (vgl. z.B. die Figur 3) wegzulassen und, wie beispielsweise in der Figur 4 dargestellt, die Leiste als Anschlag zu benutzen.Since, inter alia, the distance a D may possibly be relatively small, it is also conceivable to omit the spacers 64 (cf., for example, FIG. 3) and, for example, to use the strip as a stop, as shown in FIG.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Dichtungseinrichtungseal means
1212
bewegte Flächemoving surface
1414
Saugwalzesuction roll
1616
Bohrung, ÖffnungBore, opening
1818
Mantelcoat
2020
Dichtelementsealing element
2222
Gelenkjoint
2424
Druckschlauchpressure hose
2626
Schwenkachseswivel axis
2828
verstellbares Element, verstellbare Leisteadjustable element, adjustable bar
3030
Eingriffsabschnittengaging portion
3232
Nutgroove
3434
hintere Stirnseiterear end face
3636
Trägercarrier
3838
Anschlagattack
4040
vordere Stirnflächefront face
4242
Belüftungsansatzvent tab
4444
dichtendes Endesealing end
4646
Dichtbereichsealing area
4848
Belüftungsbereichvent area
5050
Spaltgap
5252
Ansatzapproach
5454
Klemmeinrichtungclamper
5656
Kolbenpiston
5858
Druckschlauchpressure hose
6060
Gegenflächecounter surface
6262
Druckschlauchpressure hose
6464
Distanzhalterspacer
6666
Führungguide
6868
Zwischenleisteintermediate strip
6969
Führungguide
7070
Druckschlauchpressure hose
7272
hintere Kanterear edge
7474
Druckfedercompression spring
7676
Druckschlauchpressure hose
7878
Klemmeinrichtungclamper
8080
Kolbenpiston
8282
Druckschlauchpressure hose
8484
Anschlagselementstop element
8686
Eingriffsabschnittengaging portion
8888
Nutgroove
9090
Klemmeinrichtungclamper
9292
Kolbenpiston
9494
Druckschlauchpressure hose
9696
Druckschlauchpressure hose
9898
Federblechsheet-metal spring
100100
Sägezahnprofilsawtooth
102102
Ansatzapproach
104104
elastisches kompressibles Materialelastic compressible material
106106
Federfeather
FP F P
Anpresskraftcontact force
LL
Laufrichtung der bewegten FlächeRunning direction of the moving surface
P1 P 1
Druckzonepressure zone
P2 P 2
Druckzonepressure zone
VR V R
Verschieberichtungdisplacement direction
aa
Hubstroke
aD a D
Abstanddistance

Claims (40)

  1. Sealing device (10) for the lateral sealing of at least one positive pressure or vacuum zone adjoining a moving surface (12) in a paper machine, having at least one sealing element (20) which is opposite the moving surface (12), is mounted via a joint (22) such that it can be pivoted and, in order to bear on the moving surface (12) by means of appropriate pivoting, can be acted on with a pressing force (FP), characterized in that the joint (22) and, with the latter, the pivot axis (26) can be adjusted towards and away from the moving surface (12), in particular in the direction of the pressing force (FP), and can be fixed in its respective position.
  2. Sealing device according to Claim 1, characterized in that the joint (22) is formed on a strip (28) which is adjustable and can be fixed in its respective position.
  3. Sealing device according to Claim 2, characterized in that the strip (28) extends transversely with respect to the running direction (L) of the moving surface (12).
  4. Sealing device according to Claim 2 or 3, characterized in that the strip (28) can be fixed to a support (36).
  5. Sealing device according to one of Claims 2 to 4, characterized in that the strip can be fixed in its respective position by a clamping device (54).
  6. Sealing device according to Claim 5, characterized in that the clamping device (54) comprises at least one piston (56) and/or at least one pressure hose (58).
  7. Sealing device according to one of Claims 2 to 6, characterized in that the strip (28) is provided with spacers (64) and can be adjusted into an end position, in which these spacers (64) bear on the moving surface (12) and therefore define a predefinable position of the joint relative to the moving surface (12).
  8. Sealing device according to Claim 7, characterized in that a plurality of spacers (64) are provided distributed over the moving surface (12) transversely with respect to the running direction (L).
  9. Sealing device according to Claim 7 or 8, characterized in that the spacers (64) are at least partly formed by knobs, rollers and/or the like.
  10. Sealing device according to one of Claims 2 to 9, characterized in that the spacers (64) can be lifted off the moving surface (12) again by means of a predefinable return travel, in particular when fixing the strip (28).
  11. Sealing device according to one of the preceding claims, characterized in that the pivot axis (26) of the sealing element (20), defined by the joint (22), extends transversely with respect to the running direction (L) of the moving surface (12).
  12. Sealing device according to one of Claims 2 to 11, characterized in that, in order to form the joint (22), the strip (28) is provided with an engagement section (30) which engages in a groove (32) provided in the sealing element (20).
  13. Sealing device according to Claim 12, characterized in that the groove (32) is provided on a rear end (34) of the sealing element (20) as viewed in the running direction (L) of the moving surface (12).
  14. Sealing device according to one of Claims 2 to 13, characterized in that the sealing element (20), viewed generally in the running direction (L) of the moving surface (12), is arranged between the strip (28) and a stop (38) assigned in particular to a support (36) or the like.
  15. Sealing device according to Claim 14, characterized in that the front end face (40) of the sealing element (20), facing the stop (38), is curved convexly.
  16. Sealing device according to one of the preceding claims, characterized in that the sealing element (20) comprises a ventilation extension (42), which extends in the running direction (L) of the moving surface (12), away from the end (44) of the sealing element (20) which interacts in a sealing manner with this surface (12), in order to ensure ventilation, in particular of openings (16) provided in the moving surface (12), in a ventilation region (48) adjoining the sealing region (46).
  17. Sealing device according to one of Claims 2 to 16, characterized in that the ventilation extension (42) forms with the moving surface (12) a gap (50) that widens in its running direction (L).
  18. Sealing device according to one of Claims 2 to 17, characterized in that, in order to bear on the moving surface (12), the sealing element (20) can be acted on appropriately in the region of its end (44) interacting in a sealing manner with this surface (12).
  19. Sealing device according to Claims 2 to 18, characterized in that, in the region of its end (44) interacting in a sealing manner with the moving surface (12), the sealing element (20) has an extension (52) extending generally away from the moving surface (12) and can be acted on appropriately via this extension (52).
  20. Sealing device according to one of the preceding claims, characterized in that, in order to bear on the moving surface (12), the sealing element (20) can be acted on appropriately by at least one pressure hose (24).
  21. Sealing device according to one of Claims 2 to 20, characterized in that the strip (28) can be adjusted by means of at least one pressure hose (62).
  22. Sealing device according to one of Claims 2 to 21, characterized in that the strip (28) is implemented in many parts, in particular in two parts, and in that the strip parts (28', 28") can be adjusted, in particular displaced, relative to one another by a defined amount (a).
  23. Sealing device according to Claim 22, characterized in that the multipart strip (28) can initially be adjusted in the pulled-apart state to such an extent that the ventilation extension (42) of the sealing element (20) bears on the moving surface (12).
  24. Sealing device according to Claim 23, characterized in that the sealing element (20) can be acted on via the strip (28) in such a way that the ventilation extension (42) is pressed against the moving surface (12).
  25. Sealing device according to one of Claims 2 to 24, characterized in that the strip (28) comprises two strip parts (28', 28") that can be adjusted relative to one another by a predefinable travel (aD), and the strip part (28') having the joint (22) or the engagement section (30), after the other strip part (28") has been fixed, can be pulled back again in accordance with the predefinable travel (a) in order to lift the ventilation extension (42) off the moving surface (12) again.
  26. Sealing device according to Claim 25, characterized in that the strip part (28') having the joint (22) or the engagement section (30) is spring-loaded into its pulled-back position.
  27. Sealing device according to one of Claims 2 to 26, characterized in that the strip part (28') having the joint (22) or the engagement section can be acted on in its pulled-out position by at least one pressure hose (76).
  28. Sealing device according to one of Claims 2 to 27, characterized in that the other strip part (28") can be fixed in its respective position by a clamping device (54).
  29. Sealing device according to Claim 28, characterized in that the clamping device (54) comprises at least one piston (56) and/or at least one pressure hose (58).
  30. Sealing device according to one of the preceding claims, characterized in that the sealing element (20) can be fixed in its respective pivoted position by at least one clamping device (78).
  31. Sealing device according to Claim 30, characterized in that the clamping device (78) comprises at least one piston (80) and/or at least one pressure hose (82).
  32. Sealing device according to Claim 31, characterized in that the clamping device (78) is implemented in such a way that the sealing element (20) is separated from the moving surface (12) when the piston or pressure hose is pressurized.
  33. Sealing device according to one of the preceding claims, characterized in that a stop element (84) is provided which can be fixed at a respective distance from the moving surface (12) and limits the contact movement of the sealing element (20).
  34. Sealing device according to Claim 33, characterized in that the stop element (84) can be fixed in its respective position by a clamping device (90).
  35. Sealing device according to Claim 34, characterized in that the clamping device (90) comprises at least one piston (92) and/or at least one pressure hose (94).
  36. Sealing device according to Claims 34 and 35, characterized in that the stop element (84) can be pulled back again by at least one pressure hose (96), taking with it the sealing element (20), at least to such an extent that the sealing element (20) is separated from the moving surface (12).
  37. Sealing device according to Claim 35, characterized in that the clamping device (90) is implemented in such a way that, when the piston (92) or pressure hose (94) is pressurized, the stop element (84) is pulled back again, taking with it the sealing element (20), at least to such an extent that the sealing element (20) is separated from the moving surface (12).
  38. Sealing device according to one of the preceding claims for the lateral sealing of at least one pressure zone (P1, P2) adjacent to the inner or outer wall of a rotating shell (18) of a suction or blower roll or to a moving belt.
  39. Sealing device according to one of the preceding claims for use between a suction or blower box and the rotating shell (18) of a suction or blower roll or a moving belt.
  40. Sealing device according to one of the preceding claims, characterized in that the sealing element (20) is formed as a sealing strip extending at least substantially over the entire roll length.
EP03001596A 2002-03-28 2003-01-24 Sealing device Expired - Fee Related EP1348805B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10214132A DE10214132A1 (en) 2002-03-28 2002-03-28 seal means
DE10214132 2002-03-28

Publications (2)

Publication Number Publication Date
EP1348805A1 EP1348805A1 (en) 2003-10-01
EP1348805B1 true EP1348805B1 (en) 2007-11-14

Family

ID=27798240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03001596A Expired - Fee Related EP1348805B1 (en) 2002-03-28 2003-01-24 Sealing device

Country Status (3)

Country Link
EP (1) EP1348805B1 (en)
AT (1) ATE378466T1 (en)
DE (2) DE10214132A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016040974A2 (en) 2014-09-15 2016-03-24 Röchling Leripa Papertech GmbH & Co. KG Sealing strip systems for suction rolls

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10331399A1 (en) * 2003-07-11 2005-01-27 Voith Paper Patent Gmbh Sealing device for a paper machine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2274641A (en) * 1938-02-07 1942-03-03 Abbott Suction roll
US2312519A (en) * 1939-06-10 1943-03-02 Beloit Iron Works Balanced seal for suction rolls
FI100897B (en) * 1993-11-05 1998-03-13 Valmet Paper Machinery Inc Paper machine suction roll suction box sealing structure and method for suction roll sealing
DE19751283B4 (en) * 1997-11-19 2007-12-20 Voith Patent Gmbh seal means
DE19842837A1 (en) * 1998-09-18 2000-03-23 Voith Sulzer Papiertech Patent Sealing device and method for sealing pressure zones in a paper machine
DE10110946A1 (en) * 2001-03-07 2002-09-12 Voith Paper Patent Gmbh seal means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016040974A2 (en) 2014-09-15 2016-03-24 Röchling Leripa Papertech GmbH & Co. KG Sealing strip systems for suction rolls

Also Published As

Publication number Publication date
DE50308575D1 (en) 2007-12-27
DE10214132A1 (en) 2003-10-09
EP1348805A1 (en) 2003-10-01
ATE378466T1 (en) 2007-11-15

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