EP3022356B1 - Suction or blowing roll having a sealing strip - Google Patents

Suction or blowing roll having a sealing strip Download PDF

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Publication number
EP3022356B1
EP3022356B1 EP14723078.3A EP14723078A EP3022356B1 EP 3022356 B1 EP3022356 B1 EP 3022356B1 EP 14723078 A EP14723078 A EP 14723078A EP 3022356 B1 EP3022356 B1 EP 3022356B1
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EP
European Patent Office
Prior art keywords
suction
sealing strip
roll
sealing
roll shell
Prior art date
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Active
Application number
EP14723078.3A
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German (de)
French (fr)
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EP3022356A1 (en
Inventor
Marc Erkelenz
Jochen Honold
Helmut BAMMER
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Voith Patent GmbH
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Voith Patent GmbH
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Publication of EP3022356A1 publication Critical patent/EP3022356A1/en
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Publication of EP3022356B1 publication Critical patent/EP3022356B1/en
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/002—Opening or closing mechanisms; Regulating the pressure
    • D21G1/004—Regulating the pressure
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings

Definitions

  • the invention relates to a suction or blower roll with a sealing strip according to the preamble of claim 1.
  • Sealing strips are used for a long time in suction or blow rolls of paper, board or Tissuemaschine to seal over or under pressure against the environment by their sealing surface is made against the inside of the roll shell and upon rotation of the roll shell with the inside of the Roll shell is in frictional contact.
  • sealing strips are for example in the WO 2007/003698 or DE 10 2011 004055 described.
  • the material from which a conventional sealing strip is made is optimized to provide a high abrasion resistance, with the result that it often has a comparatively high modulus of elasticity and is often hard and brittle. Furthermore, the material thickness of the material portion of the sealing strip in the front wall is often quite low. Therefore, it may happen that the sealing strip can break off in the region of the front wall, when the material section which provides the front wall is brought into frictional contact with the roll shell inner side.
  • the object of the present invention is therefore to develop a sealing strip of the aforementioned type to the effect that it can be optimized both in terms of their abrasion resistance and in terms of a possible breakout of parts of the lubricant channel.
  • the sealing surface for sealing the overpressure or underpressure zone against the inside of the roll shell can be adjusted and lubricant can be brought into the inlet gap between the sealing surface and the inside of the roll shell by means of the lubricant channel, with the roll shell at the front end side being rotated by the roll shell runs on the sealing strip and runs off at the rear end side of this.
  • the sealing strip according to the invention is characterized in that the sealing strip comprises a first material section providing the sealing surface and a second material section providing the front wall at least in sections, wherein the first material section is made of a first material and the second material section is made of a second material and the first and second material differ in at least one physical property, such as modulus of elasticity, abrasion resistance, hardness, brittleness.
  • the solution according to the invention makes it possible to optimally adapt the sealing strip with respect to the material selection to the requirements with regard to abrasion resistance of the sealing surface and elasticity for the area of the front wall of the lubricating water channel.
  • the inventive solution does not necessarily require that the entire front wall is provided by the second material portion of the second material, but it is also conceivable that the front wall Section by another material section, for example, is also provided by the first portion of material.
  • sealing strip when used in accordance with its intended purpose, is installed with its longitudinal direction oriented in the cross-machine direction of the roll into the roll.
  • both the first material and the second material are elastic.
  • the first material providing the sealing surface should in this case be designed so elastically that the sealing surface can conform to the inside of the roll jacket in order to provide a good sealing effect.
  • On the front wall providing second material portion can act by entrained with the roll shell dirt particles. can. Since the second material section in the region of the front wall-viewed in the circumferential direction of the roll shell-has a generally much smaller wall thickness than the first material section providing the sealing surface, the second material section is subject to greater mechanical stresses than the first material section.
  • the second material should therefore preferably be sufficiently elastic that this can act on the front wall acting mechanical stresses - for example.
  • the second material has a smaller modulus of elasticity than the first material.
  • the first material at room temperature have an E-modulus of 10,000N / mm 2 or more, Furthermore, it is conceivable in this context that the second material at room temperature an E-modulus of 8000N / mm 2 or less, preferably 5000N / mm Has 2 or less.
  • the second material is less hard and / or brittle than the first material. In this way, the risk of breaking out of the front wall providing second material section can be reduced.
  • the requirement of the lowest possible coefficient of friction in the friction pairing with the material of the inside of the roll shell -in the rule steel- is provided. It is conceivable in this context in particular that the first material in the friction pairing with the material of the inside of the roll shell has a coefficient of friction of 0.15 or less. The results show that it is advantageous if the second material has a larger coefficient of friction than the first material. It is conceivable here that the second material in the friction pairing with the material of the inside of the roll mantle-as a rule steel-has a coefficient of friction of 0.18 or more.
  • the first material may be one comprising, as an essential component, a plastic-graphite mixture, in particular a rubber-graphite mixture. It is conceivable, in particular, that the first material is formed by a rubber-graphite mixture. Mixtures of 45-80 wt .-% graphite and 55-20 wt .-% plastic or rubber, where at mixing ratios with more graphite than Plastic on the one hand, a higher self-lubrication effect is achieved, but the graphite content may not be too high, otherwise the material is too brittle.
  • the second material may be one comprising, as an essential component, a plastic, in particular polyphenylene ether ( PPE ).
  • PPE polyphenylene ether
  • essential ingredient When the term “essential ingredient” is used herein, it should be understood that this ingredient constitutes the largest proportion in weight percent of the material.
  • the lubricant is preferably substantially water.
  • the term "essentially” refers to the possible possibility of adding lubricant additives to the water, with water always being the main constituent (based on volume%) of such a mixture.
  • the first material section forms a base body providing the rear wall and the sealing surface
  • the second material section forms a lip providing the front wall, wherein the lip is connected to the base body at a connection point.
  • the lip is also more elastic, in particular flexurally elastic than the main body.
  • the base body has a rear side, which provides the rear end side of the sealing strip.
  • the main body it is conceivable for the main body to have a front side with a first and a second section, wherein the first section provides a part of the lubricant channel and the second section provides the connection point at which the lip is connected to the main body.
  • the front face of the sealing strip is provided by the lip.
  • the front of the main body in addition to the first and second portion has a third portion which provides a part of the front end side of the sealing strip.
  • a part of the front end side of the sealing strip is provided by the base body and another part of the front end side of the sealing strip by the lip. Since in sealing strips, the two end faces often serve as guide surfaces of the sealing strip in the sealing strip holder, which define the direction of movement of the sealing strip when they are attached to the inside of the roll shell, it is particularly useful if formed on the front end of the transition between the lip and the base flat is, ie for example, does not form a stage or a paragraph.
  • the lip can be connected to the main body. According to one possibility, it is conceivable that the lip is releasably connected to the base body, in particular non-positively and / or positively connected to the base body. Conceivable here are in particular screw or joint connections. Through a detachable connection, it is possible without much effort to replace a damaged lip with a new lip.
  • first and the second material differ from one another in terms of thermal length expansions, it may be that, viewed in the longitudinal direction of the sealing strip, the lip and the base body extend differently from one another.
  • a preferred embodiment of the invention therefore provides that the lip and the base body are connected to one another in a movable manner relative to one another in the longitudinal direction of the sealing strip , Concretely, this can be provided, for example, by a positive connection between the lip and the base body be, for example, in the form of a dovetail joint, which allows a relative movement of the lip and body in the longitudinal direction of the sealing strip. It should be noted at this point that the above-mentioned relative mobility is not only conceivable in connection with different thermal linear expansions of lip and base body.
  • the lip arranged on the main body is inextricably linked, in particular materially bonded, to the main body.
  • a connection that is particularly easy to manufacture and therefore inexpensive to produce in the production of the sealing strip is provided. It is conceivable, for example, an adhesive bond.
  • the sealing strip comprises stiffening ribs against which the lip is supported during rotational movement of the roll shell. It is conceivable in this context in particular that the stiffening ribs are arranged on the lip. Alternatively or additionally, it is conceivable that the stiffening ribs are arranged on the rear wall.
  • the lip is formed such that this under normal use inclined and / or curved to the radial direction of the roll shell, wherein the inclination and / or curvature is directed in the direction of movement of the roller.
  • the lip is designed in such a way that, when used as intended, it is essentially in the radial direction of the Roll mantle runs. Such a lip is particularly simple and therefore inexpensive to produce.
  • the sealing surface viewed in the circumferential direction of the roll shell has an extension of 15 millimeters - 70 millimeters, in particular 15 millimeters - 50 millimeters.
  • the lip seen in the circumferential direction of the roll shell has a wall thickness of 0.5 millimeters - 6 millimeters.
  • the lip is designed such that when properly using the sealing strip in the state by the sealing surface is employed against the inside of the roll shell, the upper edge lip against the Inside the roll shell is employed -th during rotation of the roll shell with the inside in frictional contact is or spaced at most 10 millimeters, preferably at most 4 millimeters to the inside of the roll shell.
  • the lip In the salaried then acts the lip in the manner of a "sealing lip” or a “wiper blade” and seals the lubricant channel from the front, so that the lubricant either remains in the lubrication channel or is drawn into the inlet gap of sealing surface and roll shell inside, but only slightly different can escape from the lubricant channel. Furthermore, the fact that the lip is turned on the roller shell inside only after a certain period of operation, eg. In the course of wear of the sealing surface, occur and does not necessarily have to be the case already at the beginning of the operating time of the sealing strip.
  • the lubricant channel extends from the bottom inclined to the sealing surface, the inclination is directed towards the rear end of the sealing strip, in particular with a horizontal angle between 20 ° and 70 °, in particular between 30 ° and 50 °.
  • the lubricant along the oblique plane formed by the rear wall can be transported particularly easily into the inlet gap between the sealing surface and the roll shell inner side.
  • This effect is particularly pronounced when the lubricant channel is filled to or almost to the inside of the roll shell with the lubricant, and is thereby entrained by the inside of the roll shell.
  • a preferred embodiment of the invention provides that the lubricant groove extends over the greater part of the length of the sealing strip.
  • the sealing strip comprises a guided inside the sealing lubricant distribution with a extending in the longitudinal direction of the sealing strip Schmierstoffzu Switzerlandkanal and one or a plurality of riser (s), the one end with the lubricant groove and the other end with the lubricant supply channel is connected or are, in the case of several risers these are arranged side by side in the longitudinal direction of the lubricant channel.
  • the lubricant channel can be connected to a lubricant supply line guided outside the sealing strip.
  • the sealing strip according to the invention can be used in any kind of suction or blower rolls for web material processing and / or manufacturing machines, especially paper, board or tissue machines at different positions.
  • the sealing strip according to the invention can be used in positions in which the lubricant channel is not “upside down” with the opening facing downwards is arranged, since with a "upside down” orientation of the lubricant channel, the function of the lubricant channel comes less to bear, since it can serve less than reservoir for the lubricant in this case than when the opening of the channel is directed upward.
  • An aspect of the invention based on this finding therefore proposes a suction or blower roll with a sealing device for sealing an overpressure or underpressure zone of the suction or blower roll with at least one sealing strip, in which the sealing strip in the suction or blower roll is viewed in one plane defined by the rotational movement of the roll mantle is installed in a 7 o'clock to 12 o'clock position when the rotational direction of the roll mantle is in the clockwise direction and in a 5 o'clock to 12 o'clock position when the rotational direction of rotation of the roll mantle is counterclockwise.
  • the generic sealing strips have a longitudinal direction, which extends under the intended use of the sealing strips in the cross-machine direction of the roller in which they are installed.
  • the in the Figures 1-4 shown sealing strips 1, 1a, 1b, 1c are shown in a cross-sectional plane which is perpendicular to the longitudinal direction of the sealing strips 1, 1a, 1b, 1c clamped.
  • the rotational direction of movement of the roll mantle also extends in the aforementioned cross-sectional plane.
  • FIG. 1 shows a sealing strip 1 when used as intended in a-not further shown- sealing device of a suction roll of a web material processing and / or manufacturing machine.
  • the sealing strip 1 has a front end face 14 and a rear end face 15 and an upper face 19 extending between the two end faces 14, 15 which provides a sealing surface 2 and a lubricant groove 5 formed by a cutout of the sealing strip 1. As from the representation of FIG. 1 can be seen, the lubricant groove 5 between the front end face 14 and the sealing surface 2 is arranged. Next is from the FIG.
  • a lubricant-present in Shape of water in the inlet gap 8 between the sealing surface 2 and the inside 3 of the roll shell 4 can be brought.
  • the roll mantle 4 runs on the front face 14 on the sealing strip 1 and on the rear face 15 of this again on.
  • the lubricant channel 5 is arranged in front of the sealing surface 2 and the front wall 6 in front of the rear wall 7.
  • the sealing strip 1 also has a guided within the sealing strip 1 Schmierffenverteilsystem with extending in the longitudinal direction of the sealing strip 1 Schmierffenzu Switzerlandkanal 9 and a plurality of risers 10 (of which in the illustration of FIG. 1 only one can be seen).
  • the risers 10 are connected at one end to the lubricant channel 5 and the other end to the lubricant supply channel 9 and arranged in the longitudinal direction of the lubricant channel 5 side by side.
  • the in the FIG. 1 shown sealing strip 1 is formed by a base body 11 forming a first material portion of a first material and a bending elastic lip 12 forming the second material portion of a second material.
  • the lip 12 provides the front wall 6.
  • the first and the second material differ in the present case, at least in the physical properties modulus of elasticity, abrasion resistance and friction coefficient of each other.
  • the first material essentially comprises a rubber-graphite mixture and has a graphite content of 60% by weight and a rubber content of 35% by weight, and further constituents.
  • the second material comprises as essential ingredient polyphenylene ether ( PPE ) .
  • the first material has an E-modulus of approx. 14000 N / mm 2 and the second material has an E-modulus of approx. 2400N / mm 2 . Therefore, the second material has a smaller modulus of elasticity than the first material.
  • first material and the second material are matched to one another in such a way that in a friction pairing with the material of the inner side 3 of the roll shell 4 -this steel is in the case of sliding friction a smaller coefficient of friction - namely 0.125- as the second material-namely 0.2 - Has.
  • the lip 12 is designed so that when used properly the sealing strip 1 in the state by the sealing surface 2 is employed against the inside 3 of the roll shell 4, the upper edge 13 lip 12 against the inside 3 of the roll shell 4 and employed with this is in frictional contact. Furthermore, the lip 12 extends curved in the direction of movement D of the roll shell 4 viewed. This can be caused by the lip 12 is already made curved or by the lip without self-curvature due to the friction with the roll shell inner side 3 undergoes this curving force. In the latter case, the lip in the present case is made so that the upper edge 13 in the state in which the sealing surface 2 is not employed against the roll shell inner side 3 protrudes in height above the sealing surface 2.
  • the lip can be detachably connected to the base body 11 at a connection point 20, for example, in a force-locking manner in the form of a screw connection.
  • the main body 11 further forms the rear end face 15 of the sealing strip 1.
  • the base body 11 has a front side which has a first section 21, a second section and a third section 22, the first section providing a part of the lubricant channel 5, the second section providing the connection point 20 on which the lip 12 is connected to the main body 11 is connected and the third portion 22 provides a portion of the front end face 14 of the sealing strip 1.
  • the front end face 14 of the sealing strip 1 is provided by the lip 12 and the third section 22 of the front side of the main body 11. Furthermore, it can be seen that at the front end face 14, the transition between the lip 12 and the base body 11 is flat, i. E. for example, does not form a stage or a paragraph.
  • the lubricant channel 5 extends inclined from the bottom to the sealing surface, wherein the inclination with a horizontal angle between 20 ° and 70 ° includes. Furthermore, extends to all in the Figures 1-4 and 5 shown sealing strips 1, 1a, 1b, the lubricant channel 5 over most of the length of the respective sealing strip 1, 1a, 1b, 1c.
  • sealing strip 1a comprises a plurality of longitudinally of the sealing strip juxtaposed stiffening ribs 16 against which the lip 12a is supported during rotational movement D of the roll shell 4 by the lip 12 is pressed with the stiffening ribs 16 against the rear wall 7.
  • the stiffening ribs 16 are arranged on the lip 12a.
  • the lip 12a is designed such that this is used when the sealing strip 1a is used as intended in that the sealing surface 2 against the inner side 3 of the roll shell 4, the upper edge 13 lip 12a to the inside 3 of the roll shell 4, wherein the distance here is 2-4 millimeters. Further, the lip 12a extends inclined in the direction of movement D of the roll shell 4, wherein the lip 12a is already made inclined.
  • sealing strip 1a is also to be seen that at the front end face 14 of the transition between the lip 12a and the base body 11 is formed by a paragraph.
  • sealing strip 1b differs from that of FIG. 2 merely in that the front end face 14 is completely provided by the lip 12b '. As a result, a flat front end side 14 is also provided.
  • FIG. 4 shows a further inventive sealing strip 1c in a direction perpendicular to the longitudinal direction of the cross-sectional plane. Unlike in the FIGS. 1 to 3 shown sealing strips 1, 1a and 1b, the lip 12c in the FIG. 4 Sealing strip 1c shown formed such that it extends when used properly in the radial direction of the roll shell 4 substantially.
  • the FIG. 4 shows the sealing strip 1c but not installed, ie without roll shell.
  • the base body 11 has a rear side, which provides the rear end face 15 of the sealing strip 1c. Furthermore, the main body 11 has a front side with a first portion 21, a second portion and a third portion 22, wherein the first portion 21 a part of the lubricant groove 5, the second portion, the junction of the main body 11 with the lip 12c and the third portion 22 provides a part of the front end face 14 of the sealing strip 1c.
  • the front face 14 of the sealing strip in sections by the lip 12c and partially formed by the base body 11, wherein at the front end 14 of the transition between the lip 12c and the base 11 is flat, ie formed without step or step.
  • sealing strip 1c is formed only by the main body 11.
  • the in the FIG. 4 shown sealing strip 1c is present only formed from the main body 11 and the lip 12c, wherein which is formed by the groove bottom to the sealing surface 2 extending portion of the lubricant channel 5 through the first portion 21 of the base body 11 and inclined as an inclined plane at an angle of about 40 ° -50 ° to the horizontal.
  • connection point 20 forms a dovetail connection, which permits relative movability of the lip 12c and base body 11 in the longitudinal direction of the sealing strip 1c, ie when used in the cross-machine direction of the roller as intended, but a relative mobility in other directions than the aforementioned essentially or completely prevented.
  • This embodiment is particularly useful if the lip 12c and the base body 11 in the longitudinal direction of the sealing strip 1c have a mutually different thermal expansion.
  • FIG. 5 shows the lip 12a or 12b in a perspective view with the plurality of longitudinally of the lip 12a, 12b juxtaposed stiffening ribs 16th
  • FIG. 6 shows a suction roll according to the invention 18 for a web material processing and / or manufacturing machine, in particular paper, board or Tissuemaschine, in a cross-sectional plane perpendicular to the longitudinal direction of the suction roller 18. It should be noted that the longitudinal direction of the sealing strip 1 or 1a or 1b or 1c and the suction roll 18 coincide.
  • the suction roll 18 has at least one sealing device 17 for sealing a vacuum zone V of the suction roll 18 with respect to the surroundings U.
  • the sealing device 17 comprises at least one sealing strip 1, 1a, 1b or 1c-present two sealing strips according to the invention.
  • the two sealing strips 1, 1a or 1b are according to the invention in the suction roller 18 in the cross-sectional plane or in a plane defined by the rotational movement D of the roll shell 4 plane in a 7 o'clock to 12 o'clock position in clockwise rotation and in a 5 o'clock to 12 Clock position built in counterclockwise rotation.
  • the rotation D of the roll mantle is in a clockwise direction and the two sealing strips 1, 1a, 1b or 1c are installed in the roll 18 in a 10 o'clock position.
  • the two sealing strips 1, 1a, 1b or 1c are installed as intended in the roller 18, ie viewed in the rotational movement direction D of the roll shell 4, the lubricant groove 5 is arranged in front of the sealing surface 2 and the front wall 6 in front of the rear wall 7.

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  • Sealing With Elastic Sealing Lips (AREA)
  • Paper (AREA)

Description

Die Erfindung betrifft eine Saug- oder Blaswalze mit einer Dichtleiste nach dem Oberbegriff des Anspruchs 1.The invention relates to a suction or blower roll with a sealing strip according to the preamble of claim 1.

Dichtleisten werden seit langer Zeit in Saug- oder Blaswalzen von Papier-, Karton- oder Tissuemaschine eingesetzt, um Über- oder Unterdruckzonen gegenüber der Umgebung abzudichten, indem deren Dichtfläche gegen die Innenseite des Walzenmantels angestellt wird und sich bei Drehbewegung des Walzenmantels mit der Innenseite des Walzenmantels im Reibkontakt befindet.Sealing strips are used for a long time in suction or blow rolls of paper, board or Tissuemaschine to seal over or under pressure against the environment by their sealing surface is made against the inside of the roll shell and upon rotation of the roll shell with the inside of the Roll shell is in frictional contact.

Solche Dichtleisten sind beispielsweise in der WO 2007/003698 oder DE 10 2011 004055 beschrieben.Such sealing strips are for example in the WO 2007/003698 or DE 10 2011 004055 described.

Bei den seit Langen bekannten Dichtleisten findet eine Schmierung der Reibpaarung Dichtfläche-Innenseite Walzenmantel durch Spritzrohre statt, die ein Schmiermittel - in der Regel Wasser- in den Spalt zwischen Dichtfläche und Innenseite Walzenmantel einbringen. Solche Systeme haben den Nachteil, dass das Schmiermittel oft nicht effektiv zwischen die Dichtfläche und Innenseite des Walzenmantels gebracht werden kann und daher eine hohe Menge an Schmiermittel für eine ausreichende Schmierung erforderlich ist.In the case of the sealing strips known for a long time, lubrication of the friction pairing of the sealing surface inside the roll shell takes place by means of spray tubes, which introduce a lubricant - usually water - into the gap between the sealing surface and the inside roll shell. Such systems have the disadvantage that the lubricant often can not be effectively brought between the sealing surface and the inside of the roll shell and therefore a high amount of lubricant for sufficient lubrication is required.

Von der Anmelderin wurde in der nahen Vergangenheit ein neues Dichtleistensystem entwickelt, bei dem in der Dichtleiste eine Schmiermittelrinne mit einer vorderen und einer hinteren Wandung eingearbeitet ist, die in Drehbewegungsrichtung des Walzenmantels betrachtet vor der Dichtfläche angeordnet ist und mittels der das Schmiermittel direkt in den Einlaufspalt zwischen der Dichtfläche und Walzenmantelinnenseite einbringbar ist.The applicant has developed in the recent past, a new sealing strip system in which in the sealing strip a lubricant channel is incorporated with a front and a rear wall, which is viewed in the direction of rotation of the roll shell in front of the sealing surface and by means of the lubricant directly into the inlet gap between the sealing surface and roll shell inner side can be introduced.

Für gewisse Anwendungen, wie bspw. Anwendungen bei denen die Dichtleiste bspw. in einer 5-12Uhr Position (bei Drehbewegungsrichtung des Walzenmantels gegen den Uhrzeigersinn) oder in einer 7-12 Uhr Position (bei Drehbewegungsrichtung des Walzenmantels in Uhrzeigersinn) in die Walze eingebaut ist, hat sich nun gezeigt, dass die vordere Wandung der Schmiermittelrinne vorteilhafterweise bis oder nahezu bis zur Innenseite des Walzenmantels hochgezogen sollte, um die Effektivität der Ausbringung des Schmiermittels weiter zu verbessern. Dies bedeutet, dass der die vordere Wandung bereitstellende Materialabschnitt der Dichtleiste für diese Anwendungsfälle in Reibkontakt mit der Walzenmantelinnenseite sein kann.For certain applications, such as applications in which the sealing strip, for example. In a 5-12 o'clock position (in the direction of rotation of the roll shell counterclockwise) or in a 7-12 o'clock position (in the direction of rotation of the Roller shell clockwise) is installed in the roll, it has now been shown that the front wall of the lubricant channel should advantageously pulled up to or almost to the inside of the roll shell in order to further improve the effectiveness of the application of the lubricant. This means that the material section of the sealing strip which provides the front wall can be in frictional contact with the roll shell inner side for these applications.

Das Material aus dem eine übliche Dichtleiste hergestellt ist, ist auf die Bereitstellung einer hohen Abriebsbeständigkeit hin optimiert mit der Folge, dass dieses oftmals einen vergleichsweise hohen E-Modul hat sowie oftmals hart und spröde ist. Ferner ist die Materialstärke des Materialabschnitts der Dichtleiste im Bereich der vorderen Wandung oftmals recht gering. Daher kann es vorkommen, dass die Dichtleiste im Bereich der vorderen Wandung ausbrechen kann, wenn der die vordere Wandung bereitstellende Materialabschnitt mit der Walzenmantelinnenseite in Reibkontakt gebracht ist.The material from which a conventional sealing strip is made is optimized to provide a high abrasion resistance, with the result that it often has a comparatively high modulus of elasticity and is often hard and brittle. Furthermore, the material thickness of the material portion of the sealing strip in the front wall is often quite low. Therefore, it may happen that the sealing strip can break off in the region of the front wall, when the material section which provides the front wall is brought into frictional contact with the roll shell inner side.

Die Aufgabe der vorliegenden Erfindung besteht daher darin eine Dichtleiste der vorgenannten Art dahingehend weiterzuentwickeln, dass diese sowohl in Hinblick auf deren Abriebbeständigkeit als auch im Hinblick auf ein mögliches Ausbrechen von Teilen der Schmiermittelrinne hin optimiert werden kann.The object of the present invention is therefore to develop a sealing strip of the aforementioned type to the effect that it can be optimized both in terms of their abrasion resistance and in terms of a possible breakout of parts of the lubricant channel.

Diese Aufgabe wird gelöst durch eine Saug- oder Blaswalze mit den Merkmalen des Anspruchs 1.This object is achieved by a suction or blower roll having the features of claim 1.

Bei bestimmungsgemäßer Verwendung der Dichtleiste ist die Dichtfläche zur Abdichtung der Über- oder Unterdruckzone gegen die Innenseite des Walzenmantels anstellbar und mittels der Schmiermittelrinne Schmiermittel in den Einlaufspalt zwischen der Dichtfläche und der Innenseite des Walzenmantels bringbar, wobei bei Drehbewegung des Walzenmantels der Walzenmantel an der vorderen Stirnseite auf die Dichtleiste aufläuft und an der hinteren Stirnseite von dieser abläuft.When the sealing strip is used as intended, the sealing surface for sealing the overpressure or underpressure zone against the inside of the roll shell can be adjusted and lubricant can be brought into the inlet gap between the sealing surface and the inside of the roll shell by means of the lubricant channel, with the roll shell at the front end side being rotated by the roll shell runs on the sealing strip and runs off at the rear end side of this.

Die erfindungsgemäße Dichtleiste zeichnet sich dadurch aus, dass die Dichtleiste einen die Dichtfläche bereitstellenden ersten Materialabschnitt sowie einen die vordere Wandung zumindest abschnittweise bereitstellenden zweiten Materialabschnitt umfasst, wobei der erste Materialabschnitt aus einem ersten Werkstoff und der zweite Materialabschnitt aus einem zweiten Werkstoff gefertigt ist und sich der erste und der zweite Werkstoff in zumindest einer physikalischen Eigenschaft, wie bspw. E-Modul, Abriebbeständigkeit, Härte, Sprödigkeit voneinander unterscheiden.The sealing strip according to the invention is characterized in that the sealing strip comprises a first material section providing the sealing surface and a second material section providing the front wall at least in sections, wherein the first material section is made of a first material and the second material section is made of a second material and the first and second material differ in at least one physical property, such as modulus of elasticity, abrasion resistance, hardness, brittleness.

Durch die erfindungsgemäße Lösung ist es möglich die Dichtleiste bzgl. der Materialauswahl optimal an die Anforderungen im Hinblick auf Abriebbeständigkeit der Dichtfläche und Elastizität für den Bereich der vorderen Wandung der Schmierwasserrinne anzupassen.The solution according to the invention makes it possible to optimally adapt the sealing strip with respect to the material selection to the requirements with regard to abrasion resistance of the sealing surface and elasticity for the area of the front wall of the lubricating water channel.

Ein erhöhter Verschleiß, wie dies der Fall sein könnte, wenn für die Dichtfläche derselbe Werkstoff verwendet würde wie für den die vordere Wandung bereitstellenden Materialabschnitt, kann somit verhindert werden. Ebenso kann ein Ausbrechen des die vordere Wandung bereitstellenden Materialabschnitts verhindert werden, wie dies der Fall sein könnte wenn für den die vordere Wandung bereitstellenden Materialabschnitt derselbe Werkstoff verwendet würde wie für die Dichtfläche.An increased wear, as might be the case if the same material were used for the sealing surface as for the front wall providing material portion can thus be prevented. Likewise, a breaking of the front wall providing material portion can be prevented, as could be the case if the same material was used for the front wall providing the same material as for the sealing surface.

Die erfindungsgemäße Lösung fordert nicht zwangsläufig, dass die gesamte vordere Wandung durch den zweiten Materialabschnitt aus dem zweiten Werkstoff bereitgestellt ist, sondern es ist auch denkbar, dass die vordere Wandung abschnittweise durch einen anderen Materialabschnitt, bspw. auch durch den ersten Materialabschnitt bereitgestellt ist.The inventive solution does not necessarily require that the entire front wall is provided by the second material portion of the second material, but it is also conceivable that the front wall Section by another material section, for example, is also provided by the first portion of material.

Zu erwähnen ist noch, dass die Dichtleiste bei bestimmungsgemäßer Verwendung mit Ihrer Längsrichtung in Maschinenquerrichtung der Walze orientiert in die Walze eingebaut ist.It should also be mentioned that the sealing strip, when used in accordance with its intended purpose, is installed with its longitudinal direction oriented in the cross-machine direction of the roll into the roll.

Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous embodiments and further developments of the invention are specified in the subclaims.

Vorzugsweise sind sowohl der erste Werkstoff und als auch der zweite Werkstoff elastisch ausgebildet. Der die Dichtfläche bereitstellende erste Werkstoff sollte hierbei derart elastisch ausgebildet sein, dass sich die Dichtfläche zur Bereitstellung einer guten Dichtwirkung an die Innenseite des Walzenmantels anschmiegen kann. Auf den die vordere Wandung bereitstellenden zweite Materialabschnitt können durch mit dem Walzenmantel mitgenommene Schmutzpartikel einwirken. kann. Da der zweite Materialabschnitt im Bereich der vorderen Wandung - in Umfangsrichtung des Walzenmantels betrachtet- eine in der Regel deutlich geringere Wandstärke als der die Dichtfläche bereitstellende erste Materialabschnitt hat, ist der zweite Materialabschnitt gegenüber mechanischen Einwirkungen stärker beansprucht als der erste Materialabschnitt. Der zweite Werkstoff sollte daher vorzugsweise ausreichend elastisch ausgebildet sein, dass dieser auf die vordere Wandung einwirkenden mechanischen Beanspruchungen - bspw. durch Schläge aufgrund von am Walzenmantel mitgenommenen Schmutzpartikeln- ohne Beschädigung des zweiten Materialabschnitts aufnehmen kann. Versuche der Anmelderin haben gezeigt, dass es insbesondere von Vorteil ist, wenn der zweite Werkstoff einen kleineren E-Modul als der erste Werkstoff hat. Konkret kann der erste Werkstoff bei Raumtemperatur einen E-Modul von 10.000N/mm2 oder mehr haben, Ferner ist in diesem Zusammenhang denkbar, dass der zweite Werkstoff bei Raumtemperatur einen E-Modul von 8000N/mm2 oder weniger, bevorzugt 5000N/mm2 oder weniger hat.Preferably, both the first material and the second material are elastic. The first material providing the sealing surface should in this case be designed so elastically that the sealing surface can conform to the inside of the roll jacket in order to provide a good sealing effect. On the front wall providing second material portion can act by entrained with the roll shell dirt particles. can. Since the second material section in the region of the front wall-viewed in the circumferential direction of the roll shell-has a generally much smaller wall thickness than the first material section providing the sealing surface, the second material section is subject to greater mechanical stresses than the first material section. The second material should therefore preferably be sufficiently elastic that this can act on the front wall acting mechanical stresses - for example. By impacts due to entrained on the roll shell dirt particles - without damage to the second material section record. Experiments by the applicant have shown that it is particularly advantageous if the second material has a smaller modulus of elasticity than the first material. Concretely, the first material at room temperature have an E-modulus of 10,000N / mm 2 or more, Furthermore, it is conceivable in this context that the second material at room temperature an E-modulus of 8000N / mm 2 or less, preferably 5000N / mm Has 2 or less.

Ferner ist es von Vorteil, wenn der zweite Werkstoff weniger hart und/oder spröde ist als der erste Werkstoff. Hierdurch kann die Gefahr eines Ausbrechens des die vordere Wandung bereitstellenden zweiten Materialabschnitts verringert werden.Furthermore, it is advantageous if the second material is less hard and / or brittle than the first material. In this way, the risk of breaking out of the front wall providing second material section can be reduced.

Versuche der Anmelderin haben weiter gezeigt, dass es -insbesondere wenn der die vordere Wandung bereitstellende zweite Materialabschnitt in Reibkontakt mit der Innenseite des Walzenmantels gebracht wird- sinnvoll ist, wenn in einer Reibpaarung mit dem Werkstoff der Innenseite des Walzenmantels (bei Gleitreibung) der erste Werkstoff die gleiche oder eine größere Abriebbeständigkeit als der zweite Werkstoff hat. Hierdurch wird sichergestellt, dass der die vordere Wandung bereitstellende zweite Materialabschnitt mindestens so stark verschleißt wie die Dichtfläche. Hierdurch wird vermieden, dass die Funktion der Dichtleiste, insbesondere Dichtfläche, durch Verklemmen des zweiten Materialabschnitts an der Innenseite des Walzenmantels beeinträchtigt wird.Experiments by the applicant have further shown that it is useful, in particular if the front wall providing second material portion is brought into frictional contact with the inside of the roll shell, if in a friction pairing with the material of the inside of the roll shell (during sliding friction) of the first material has the same or greater abrasion resistance than the second material. This ensures that the second material section which provides the front wall wears at least as much as the sealing surface. This avoids that the function of the sealing strip, in particular sealing surface, is affected by jamming of the second material portion on the inside of the roll shell.

An den die Dichtfläche bereitstellenden ersten Werkstoff wird die Anforderung eines möglichst geringen Reibkoeffizienten in der Reibpaarung mit dem Material der Innenseite des Walzenmantels -in der Regel Stahl- gestellt. Denkbar ist in diesem Zusammenhang insbesondere dass der erste Werkstoff in der Reibpaarung mit dem Werkstoff der Innenseite des Walzenmantels einen Reibkoeffizient von 0,15 oder weniger hat. Die Ergebnisse zeigen, dass es von Vorteil ist, wenn der zweite Werkstoff einen größeren Reibungskoeffizienten als der erste Werkstoff hat. Denkbar ist es hierbei, dass der zweite Werkstoff in der Reibpaarung mit dem Werkstoff der Innenseite des Walzenmantels -in der Regel Stahl- einen Reibkoeffizient von 0,18 oder mehr hat.At the first material providing the sealing surface, the requirement of the lowest possible coefficient of friction in the friction pairing with the material of the inside of the roll shell -in the rule steel- is provided. It is conceivable in this context in particular that the first material in the friction pairing with the material of the inside of the roll shell has a coefficient of friction of 0.15 or less. The results show that it is advantageous if the second material has a larger coefficient of friction than the first material. It is conceivable here that the second material in the friction pairing with the material of the inside of the roll mantle-as a rule steel-has a coefficient of friction of 0.18 or more.

Konkret kann es sich bei dem ersten Werkstoff um einen solchen handeln, der als wesentlichen Bestandteil eine Kunststoff-Graphit-Mischung, insbesondere eine Gummi-Graphit-Mischung, umfasst. Denkbar ist insbesondere, dass der erste Werkstoff durch eine Gummi-Graphit-Mischung gebildet ist. Denkbar sind hierbei bspw. Mischungsverhältnisse von 45-80 Gew.-% Graphit und 55-20 Gew.-% Kunststoff bzw. Gummi, wobei bei Mischungsverhältnissen mit mehr Graphit als Kunststoff einerseits ein höherer Selbstschmierungseffekt erzielt wird, der Graphitanteil aber nicht zu hoch sein darf, da das Material sonst zu spröde ist.Concretely, the first material may be one comprising, as an essential component, a plastic-graphite mixture, in particular a rubber-graphite mixture. It is conceivable, in particular, that the first material is formed by a rubber-graphite mixture. Mixtures of 45-80 wt .-% graphite and 55-20 wt .-% plastic or rubber, where at mixing ratios with more graphite than Plastic on the one hand, a higher self-lubrication effect is achieved, but the graphite content may not be too high, otherwise the material is too brittle.

Bei dem zweiten Werkstoff kann es sich um einen handeln, der als wesentlichen Bestandteil einen Kunststoff, insbesondere Polyphenylenether (PPE) umfasst.The second material may be one comprising, as an essential component, a plastic, in particular polyphenylene ether ( PPE ).

Wenn vorliegend der Begriff "wesentlicher Bestandteil" verwendet wird soll darunter verstanden werden, dass dieser Bestandteil zu den größten Anteil in Gew.-% des Werkstoffs ausmacht.When the term "essential ingredient" is used herein, it should be understood that this ingredient constitutes the largest proportion in weight percent of the material.

Bei dem Schmiermittel handelt es sich vorzugsweise um im Wesentlichen Wasser. Der Begriff "im Wesentlichen" bezieht sich hierbei auf die eventuelle Möglichkeit der Zugabe von Schmierstoff-Additiven zum Wasser, wobei Wasser immer den Hauptbestandteil (bezogen auf Volumen-%) einer solchen Mischung darstellt.The lubricant is preferably substantially water. The term "essentially" refers to the possible possibility of adding lubricant additives to the water, with water always being the main constituent (based on volume%) of such a mixture.

Konkret bildet der erste Materialabschnitt einen die hintere Wandung und die Dichtfläche bereitstellenden Grundkörper und der zweite Materialabschnitt eine die vordere Wandung bereitstellende Lippe, wobei die Lippe an einer Verbindungsstelle mit dem Grundkörper verbunden ist. Bevorzugt ist in diesem Zusammenhang insbesondere vorgesehen, dass die Dichtleiste -mit Ausnahme eventueller Zuleitungsanschlüsse für die Schmiermittelzufuhr- lediglich aus dem Grundkörper und der Lippe gebildet ist. Vorzugsweise ist die Lippe ferner elastischer, insbesondere biegeelastischer als der Grundkörper.Concretely, the first material section forms a base body providing the rear wall and the sealing surface, and the second material section forms a lip providing the front wall, wherein the lip is connected to the base body at a connection point. In this context, it is preferably provided in particular that the sealing strip -with the exception of any feed connections for the supply of lubricant -is formed merely from the main body and the lip. Preferably, the lip is also more elastic, in particular flexurally elastic than the main body.

Konkret kann weiter vorgesehen sein, dass der Grundkörper eine Hinterseite hat, welche die hintere Stirnseite der Dichtleiste bereitstellt. Des Weiteren ist es denkbar, dass der Grundkörper eine Vorderseite mit einem ersten und einem zweiten Abschnitt hat, wobei der erste Abschnitt einen Teil der Schmiermittelrinne und der zweite Abschnitt die Verbindungsstelle bereitstellt, an der die Lippe mit dem Grundkörper verbunden ist. Eine solche Ausgestaltung ist besonders einfach und kostengünstig herstellbar. In diesem Fall wird die vordere Stirnseite der Dichtleiste durch die Lippe bereitgestellt.Specifically, it can further be provided that the base body has a rear side, which provides the rear end side of the sealing strip. Furthermore, it is conceivable for the main body to have a front side with a first and a second section, wherein the first section provides a part of the lubricant channel and the second section provides the connection point at which the lip is connected to the main body. Such a configuration is particularly simple and inexpensive produced. In this case, the front face of the sealing strip is provided by the lip.

Denkbar ist auch, dass die Vorderseite des Grundkörpers zusätzlich zu dem ersten und zweiten Abschnitt einen dritten Abschnitt hat, der einen Teil der vorderen Stirnseite der Dichtleiste bereitstellt. In diesem Fall ist also ein Teil der vorderen Stirnseite der Dichtleiste durch den Grundkörper und ein anderer Teil der vorderen Stirnseite der Dichtleiste durch die Lippe bereitgestellt. Da bei Dichtleisten die beiden Stirnseiten oftmals als Führungsflächen der Dichtleiste im Dichtleistenhalter dienen, welche die Bewegungsrichtung der Dichtleiste bei deren Anstellung an die Innenseite des Walzenmantels festlegen, ist es insbesondere sinnvoll, wenn an der vorderen Stirnseite der Übergang zwischen der Lippe und dem Grundkörper eben ausgebildet ist, d.h. bspw. keine Stufe oder keinen Absatz bildet.It is also conceivable that the front of the main body in addition to the first and second portion has a third portion which provides a part of the front end side of the sealing strip. In this case, therefore, a part of the front end side of the sealing strip is provided by the base body and another part of the front end side of the sealing strip by the lip. Since in sealing strips, the two end faces often serve as guide surfaces of the sealing strip in the sealing strip holder, which define the direction of movement of the sealing strip when they are attached to the inside of the roll shell, it is particularly useful if formed on the front end of the transition between the lip and the base flat is, ie for example, does not form a stage or a paragraph.

Es sind mehrere Möglichkeiten denkbar, wie die Lippe mit dem Grundkörper verbunden sein kann. Nach einer Möglichkeit ist es denkbar, dass die Lippe mit dem Grundkörper lösbar verbunden ist, insbesondere kraftschlüssig und/oder formschlüssig mit dem Grundkörper verbunden ist. Denkbar sind hierbei insbesondere Schraub- oder Fügeverbindungen. Durch eine lösbare Verbindung ist es ohne großen Aufwand möglich eine beschädigte Lippe gegen eine neue Lippe auszutauschen.There are several possibilities conceivable how the lip can be connected to the main body. According to one possibility, it is conceivable that the lip is releasably connected to the base body, in particular non-positively and / or positively connected to the base body. Conceivable here are in particular screw or joint connections. Through a detachable connection, it is possible without much effort to replace a damaged lip with a new lip.

Weisen der erste und der zweite Werkstoff zueinander unterschiedliche thermische Längenausdehnungen auf kann es sein, dass sich in Längsrichtung der Dichtleiste betrachtet die Lippe und der Grundkörper zueinander unterschiedlich ausdehnen. Um eine durch unterschiedliche thermische Längenausdehnung von Grundkörper und Lippe bedingte Deformation oder Krümmung der Dichtleiste in deren Längsrichtung zu reduzieren oder zu verhindern, sieht eine bevorzugte Ausgestaltung der Erfindung daher vor, dass die Lippe und der Grundkörper in Längsrichtung der Dichtleiste relativ zueinander bewegbar miteinander verbunden sind. Konkret kann dies bspw. durch eine formschlüssige Verbindung zwischen Lippe und Grundkörper bereitgestellt werden, bspw. in Form einer Schwalbenschwanzverbindung, die eine relative Bewegung von Lippe und Grundkörper in Längsrichtung der Dichtleiste zulässt. Zu bemerken ist an dieser Stelle, dass die o.g. relative Bewegbarkeit nicht nur in Verbindung mit unterschiedlichen thermischen Längenausdehnungen von Lippe und Grundkörper denkbar ist.If the first and the second material differ from one another in terms of thermal length expansions, it may be that, viewed in the longitudinal direction of the sealing strip, the lip and the base body extend differently from one another. In order to reduce or prevent a deformation or curvature of the sealing strip in the longitudinal direction thereof caused by different thermal expansion of the base body and lip, a preferred embodiment of the invention therefore provides that the lip and the base body are connected to one another in a movable manner relative to one another in the longitudinal direction of the sealing strip , Concretely, this can be provided, for example, by a positive connection between the lip and the base body be, for example, in the form of a dovetail joint, which allows a relative movement of the lip and body in the longitudinal direction of the sealing strip. It should be noted at this point that the above-mentioned relative mobility is not only conceivable in connection with different thermal linear expansions of lip and base body.

Alternativ dazu ist es denkbar, dass die an dem Grundkörper angeordnete Lippe unlösbar, insbesondere stoffschlüssig mit dem Grundkörper verbunden ist. Hierdurch wird eine besonders in der Fertigung der Dichtleiste leicht und damit kostengünstig herstellbare Verbindung bereitgestellt. Denkbar ist hierbei bspw. eine Klebeverbindung.Alternatively, it is conceivable that the lip arranged on the main body is inextricably linked, in particular materially bonded, to the main body. As a result, a connection that is particularly easy to manufacture and therefore inexpensive to produce in the production of the sealing strip is provided. It is conceivable, for example, an adhesive bond.

Um die Steifigkeit der Lippe gegen eine in Drehbewegungsrichtung des Walzenmantels gerichtete Belastung zu erhöhen, ist es insbesondere sinnvoll wenn die Dichtleiste Versteifungsrippen umfasst, gegen welche sich die Lippe bei Drehbewegung des Walzenmantels abstützt. Denkbar ist in diesem Zusammenhang insbesondere dass die Versteifungsrippen an der Lippe angeordnet sind. Alternativ oder ergänzend dazu ist denkbar, dass die Versteifungsrippen an der hinteren Wandung angeordnet sind.In order to increase the rigidity of the lip against a directed in the direction of rotation of the roll shell load, it is particularly useful if the sealing strip comprises stiffening ribs against which the lip is supported during rotational movement of the roll shell. It is conceivable in this context in particular that the stiffening ribs are arranged on the lip. Alternatively or additionally, it is conceivable that the stiffening ribs are arranged on the rear wall.

Um sicherzustellen dass bei Montage der Dichtleiste ein Umklappen der Lippe entgegen der Drehbewegungsrichtung des Walzenmantels erfolgt, was eine Beschädigung der Lippe und/oder eine Beschädigung der Verbindungsstelle zur Folge haben könnte ist nach einer bevorzugten Ausgestaltung der Erfindung vorgesehen, dass die Lippe derart ausgebildet ist, dass diese bei bestimmungsgemäßer Verwendung geneigt und/oder gekrümmt zur radialen Richtung des Walzenmantels verläuft, wobei die Neigung und/oder Krümmung in Bewegungsrichtung der Walze gerichtet ist.In order to ensure that during assembly of the sealing strip, a folding over of the lip takes place counter to the direction of rotation of the roll shell, which could cause damage to the lip and / or damage to the connection point is provided according to a preferred embodiment of the invention that the lip is formed such that this under normal use inclined and / or curved to the radial direction of the roll shell, wherein the inclination and / or curvature is directed in the direction of movement of the roller.

Alternativ dazu ist denkbar, dass die Lippe derart ausgebildet ist, dass diese bei bestimmungsgemäßer Verwendung im Wesentlichen in radialer Richtung des Walzenmantels verläuft. Eine solche Lippe ist besonders einfach und damit kostengünstig herstellbar.As an alternative to this, it is conceivable that the lip is designed in such a way that, when used as intended, it is essentially in the radial direction of the Roll mantle runs. Such a lip is particularly simple and therefore inexpensive to produce.

Nach einer konkreten Ausgestaltung der Erfindung ist vorgesehen, dass die Dichtfläche in Umfangsrichtung des Walzenmantels betrachtet eine Erstreckung von 15 Millimeter - 70 Millimeter, insbesondere 15 Millimeter - 50 Millimeter hat. Nach einer weiteren konkreten Ausgestaltung der Erfindung ist ferner vorgesehen, dass die Lippe in Umfangsrichtung des Walzenmantels betrachtet eine Wandstärke von 0,5 Millimeter - 6 Millimeter hat.According to a specific embodiment of the invention, it is provided that the sealing surface viewed in the circumferential direction of the roll shell has an extension of 15 millimeters - 70 millimeters, in particular 15 millimeters - 50 millimeters. According to a further specific embodiment of the invention, it is further provided that the lip seen in the circumferential direction of the roll shell has a wall thickness of 0.5 millimeters - 6 millimeters.

Wie bereits vorher erläutert, kann es zur Bereitstellung einer guten Schmiermittelversorgung zwischen Dichtfläche und Walzenmantelinnenseite sinnvoll sein, wenn die Lippe derart ausgelegt ist, dass bei bestimmungsgemäßer Verwendung der Dichtleiste im Zustand indem die Dichtfläche gegen die Innenseite des Walzenmantels angestellt ist, die Oberkante Lippe gegen die Innenseite des Walzenmantels angestellt ist -d.h. bei Drehbewegung des Walzenmantels mit dessen Innenseite in Reibkontakt ist- oder maximal 10 Millimeter, bevorzugt maximal 4 Millimeter zur Innenseite des Walzenmantels beabstandet ist. Im angestellten fungiert dann die Lippe in der Art einer "Dichtlippe" oder eines "Wischerblatts" und dichtet die Schmiermittelrinne nach vorne ab, so dass das Schmiermittel entweder in der Schmierrinne verbleibt oder in den Einlaufspalt von Dichtfläche und Walzenmantelinnenseite gezogen wird, aber nur wenig anderweitig aus der Schmiermittelrinne austreten kann. Ferner kann der Umstand, dass die Lippe an die Walzenmantelinnenseite angestellt ist erst nach einer gewissen Betriebszeit, bspw. im Laufe der Abnutzung der Dichtfläche, eintreten und muss nicht zwingend erforderlich schon am Anfang der Betriebszeit der Dichtleiste der Fall sein.As already explained above, it may be useful to provide a good supply of lubricant between the sealing surface and roll shell inside, if the lip is designed such that when properly using the sealing strip in the state by the sealing surface is employed against the inside of the roll shell, the upper edge lip against the Inside the roll shell is employed -th during rotation of the roll shell with the inside in frictional contact is or spaced at most 10 millimeters, preferably at most 4 millimeters to the inside of the roll shell. In the salaried then acts the lip in the manner of a "sealing lip" or a "wiper blade" and seals the lubricant channel from the front, so that the lubricant either remains in the lubrication channel or is drawn into the inlet gap of sealing surface and roll shell inside, but only slightly different can escape from the lubricant channel. Furthermore, the fact that the lip is turned on the roller shell inside only after a certain period of operation, eg. In the course of wear of the sealing surface, occur and does not necessarily have to be the case already at the beginning of the operating time of the sealing strip.

Für eine gute Schmiermittelversorgung kann es ferner sinnvoll sein, wenn sich die Schmiermittelrinne von deren Boden zur Dichtfläche hin geneigt erstreckt, wobei die Neigung in Richtung der hinteren Stirnseite der Dichtleiste gerichtet ist, insbesondere mit einer Horizontalen einen Winkel zwischen 20° und 70°, insbesondere zwischen 30° und 50° einschließt.For a good supply of lubricant, it may also be useful if the lubricant channel extends from the bottom inclined to the sealing surface, the inclination is directed towards the rear end of the sealing strip, in particular with a horizontal angle between 20 ° and 70 °, in particular between 30 ° and 50 °.

Hierdurch kann das Schmiermittel entlang der durch die hintere Wandung gebildeten schiefen Ebene besonders leicht in den Einlaufspalt zwischen Dichtfläche und Walzenmantelinnenseite transportiert werden. Dieser Effekt ist insbesondere dann stark ausgeprägt, wenn die Schmiermittelrinne bis oder nahezu bis zur Innenseite des Walzenmantels mit dem Schmiermittel gefüllt ist, und dadurch durch die Innenseite des Walzenmantels mitgerissen wird.As a result, the lubricant along the oblique plane formed by the rear wall can be transported particularly easily into the inlet gap between the sealing surface and the roll shell inner side. This effect is particularly pronounced when the lubricant channel is filled to or almost to the inside of the roll shell with the lubricant, and is thereby entrained by the inside of the roll shell.

Um über die im wesentlichen gesamte Länge der Dichtleiste eine gute Schmierung der Reibpaarung Dichtfläche-Innenseite Walzenmantel mit dem Schmiermittel zu erreichen sieht eine bevorzugte Ausgestaltung der Erfindung vor, dass sich die Schmiermittelrinne über den größten Teil der Länge der Dichtleiste erstreckt,In order to achieve a good lubrication of the friction mating sealing surface inside the roll shell with the lubricant over substantially the entire length of the sealing strip, a preferred embodiment of the invention provides that the lubricant groove extends over the greater part of the length of the sealing strip.

Eine Möglichkeit um die Schmiermittelrinne mit Schmiermittel zu versorgen sieht vor, dass die Dichtleiste ein innerhalb der Dichtleiste geführtes Schmiermittelverteilsystem mit einem sich in Längsrichtung der Dichtleiste erstreckenden Schmiermittelzuführkanal und einer oder einer Vielzahl von Steigleitung(en) umfasst, die einendseitig mit der Schmiermittelrinne und andernendseitig mit dem Schmiermittelzuführkanal verbunden ist bzw. sind, wobei im Falle der mehreren Steigleitungen diese in Längsrichtung des Schmiermittelkanals nebeneinander angeordnet sind. Der Schmiermittelkanal ist mit einer außerhalb der Dichtleiste geführten Schmiermittelzuführleitung verbindbar.One way to supply the lubricant channel with lubricant provides that the sealing strip comprises a guided inside the sealing lubricant distribution with a extending in the longitudinal direction of the sealing strip Schmiermittelzuführkanal and one or a plurality of riser (s), the one end with the lubricant groove and the other end with the lubricant supply channel is connected or are, in the case of several risers these are arranged side by side in the longitudinal direction of the lubricant channel. The lubricant channel can be connected to a lubricant supply line guided outside the sealing strip.

Die erfindungsgemäße Dichtleiste kann in jeglicher Art von Saug- oder Blaswalzen für Bahnmaterial verarbeitende und/oder herstellende Maschinen, insbesondere Papier-, Karton- oder Tissuemaschinen an unterschiedlichsten Positionen zum Einsatz kommen.The sealing strip according to the invention can be used in any kind of suction or blower rolls for web material processing and / or manufacturing machines, especially paper, board or tissue machines at different positions.

Besonders vorteilhaft ist die erfindungsgemäße Dichtleiste in Positionen einsetzbar, bei denen die Schmiermittelrinne nicht "kopfüber" mit der Öffnung nach unten angeordnet ist, da bei einer "kopfüber" Orientierung der Schmiermittelrinne die Funktion der Schmiermittelrinne weniger stark zum Tragen kommt, da diese in diesem Fall weniger als reservoir für das Schmiermittel dienen kann als wenn die Öffnung der Rinne nach oben gerichtet ist.Particularly advantageously, the sealing strip according to the invention can be used in positions in which the lubricant channel is not "upside down" with the opening facing downwards is arranged, since with a "upside down" orientation of the lubricant channel, the function of the lubricant channel comes less to bear, since it can serve less than reservoir for the lubricant in this case than when the opening of the channel is directed upward.

Ein auf dieser Erkenntnis beruhender Aspekt der Erfindung schlägt daher eine Saug- oder Blaswalze mit einer Dichteinrichtung zur Abdichtung einer Über- oder Unterdruckzone der Saug- oder Blaswalze mit zumindest einer Dichtleiste vor, bei der die Dichtleiste in der Saug- oder Blaswalze -betrachtet in einer durch die Drehbewegung des Walzenmantels aufgespannten Ebene- in einer 7 Uhr bis 12 Uhr Position eingebaut ist, wenn die Drehbewegungsrichtung des Walzenmantels in Uhrzeigersinn ist und in einer 5 Uhr bis 12 Uhr Position, wenn die Drehbewegungsrichtung des Walzenmantels gegen den Uhrzeigersinn ist.An aspect of the invention based on this finding therefore proposes a suction or blower roll with a sealing device for sealing an overpressure or underpressure zone of the suction or blower roll with at least one sealing strip, in which the sealing strip in the suction or blower roll is viewed in one plane defined by the rotational movement of the roll mantle is installed in a 7 o'clock to 12 o'clock position when the rotational direction of the roll mantle is in the clockwise direction and in a 5 o'clock to 12 o'clock position when the rotational direction of rotation of the roll mantle is counterclockwise.

Die Erfindung wird nachfolgend anhand von schematischen, nicht maßstabsgetreuen Zeichnungen weiter erläutert. Es zeigen die

Figur 1
eine erste Ausführungsform eine erfindungsgemäßen Dichtleiste in einer Saugwalze einer Papier-, Karton- oder Tissuemaschine,
Figur 2
eine zweite Ausführungsform eine erfindungsgemäßen Dichtleiste in einer Saugwalze einer Papier-, Karton- oder Tissuemaschine,
Figur 3
eine dritte Ausführungsform eine erfindungsgemäßen Dichtleiste in einer Saugwalze einer Papier-, Karton- oder Tissuemaschine,
Figur 4
eine vierte Ausführungsform eine erfindungsgemäßen Dichtleiste in einer Saugwalze einer Papier-, Karton- oder Tissuemaschine,
Figur 5
eine Lippe einer erfindungsgemäßen Dichtleiste in perspektivischer Ansicht und
Figur 6
eine erfindungsgemäße Saugwalze.
The invention will be further elucidated on the basis of schematic, not to scale, drawings. It show the
FIG. 1
a first embodiment of a sealing strip according to the invention in a suction roll of a paper, board or tissue machine,
FIG. 2
a second embodiment of a sealing strip according to the invention in a suction roll of a paper, board or tissue machine,
FIG. 3
a third embodiment of a sealing strip according to the invention in a suction roll of a paper, board or tissue machine,
FIG. 4
A fourth embodiment of a sealing strip according to the invention in a suction roll of a paper, board or tissue machine,
FIG. 5
a lip of a sealing strip according to the invention in a perspective view and
FIG. 6
a suction roll according to the invention.

Die gattungsgemäßen Dichtleisten haben eine Längsrichtung, die sich bei bestimmungsgemäßer Verwendung der Dichtleisten in Maschinenquerrichtung der Walze erstreckt in welche diese eingebaut sind. Die in den Figuren 1-4 gezeigten Dichtleisten 1, 1a, 1b, 1c sind in einer Querschnittsebene gezeigt, die senkrecht zur Längsrichtung der Dichtleisten 1, 1a, 1b, 1c aufgespannt ist. Bei bestimmungsgemäßer Verwendung der gattungsgemäßen Dichtleisten verläuft ferner die Drehbewegungsrichtung des Walzenmantels in der vorgenannten Querschnittsebene.The generic sealing strips have a longitudinal direction, which extends under the intended use of the sealing strips in the cross-machine direction of the roller in which they are installed. The in the Figures 1-4 shown sealing strips 1, 1a, 1b, 1c are shown in a cross-sectional plane which is perpendicular to the longitudinal direction of the sealing strips 1, 1a, 1b, 1c clamped. When the generic sealing strips are used as intended, the rotational direction of movement of the roll mantle also extends in the aforementioned cross-sectional plane.

Die in der Figur 1 zeigt eine Dichtleiste 1 bei bestimmungsgemäßer Verwendung in einer -nicht weiter gezeigten- Dichteinrichtung einer Saugwalze einer Bahnmaterial verarbeitenden und/oder herstellenden Maschine.The in the FIG. 1 shows a sealing strip 1 when used as intended in a-not further shown- sealing device of a suction roll of a web material processing and / or manufacturing machine.

Die Dichtleiste 1 hat eine vordere Stirnseite 14 und eine hintere Stirnseite 15 sowie eine sich zwischen den beiden Stirnseiten 14, 15 erstreckende Oberseite 19 welche eine Dichtfläche 2 sowie eine durch einen Ausschnitt aus der Dichtleiste 1 gebildete Schmiermittelrinne 5 bereitstellt. Wie aus der Darstellung der Figur 1 zu erkennen ist, ist die Schmiermittelrinne 5 zwischen der vorderen Stirnseite 14 und der Dichtfläche 2 angeordnet. Weiter ist aus der Figur 1 zu erkennen, dass auf Höhe H der Schmiermittelrinne 5 zwischen der vorderen Stirnseite 14 und der Schmiermittelrinne 5 eine vordere Wandung 6 sowie zwischen der Schmiermittelrinne 5 und der hinteren Stirnseite 15 eine die Dichtfläche 2 bereitstellende hintere Wandung 7 gebildet ist, wobei die hintere Wandung 7 -in Umfangsrichtung eines Walzenmantels 4 betrachteteine größere Wandstärke als die vordere Wandung 6 hat.The sealing strip 1 has a front end face 14 and a rear end face 15 and an upper face 19 extending between the two end faces 14, 15 which provides a sealing surface 2 and a lubricant groove 5 formed by a cutout of the sealing strip 1. As from the representation of FIG. 1 can be seen, the lubricant groove 5 between the front end face 14 and the sealing surface 2 is arranged. Next is from the FIG. 1 to recognize that at height H of the lubricant channel 5 between the front end face 14 and the lubricant channel 5, a front wall 6 and between the lubricant channel 5 and the rear end face 15, a sealing surface 2 providing the rear wall 7 is formed, the rear wall 7 - in the circumferential direction of a roll mantle 4 has a greater wall thickness than the front wall 6 has.

Bei bestimmungsgemäßer Verwendung der Dichtleiste 1 ist die Dichtfläche 2 zur Abdichtung der Über- oder Unterdruckzone gegen die Innenseite 3 des eine Vielzahl von Sauglöchern L umfassenden Walzenmantels 4 anstellbar und bei Drehbewegung D des Walzenmantels 4 mit dieser in Reibkontakt. Mittels der zur Innenseite 3 des Walzenmantels 4 hin offenen Schmiermittelrinne 5 ist ein Schmiermittel -vorliegend in Form von Wasser- in den Einlaufspalt 8 zwischen der Dichtfläche 2 und der Innenseite 3 des Walzenmantels 4 bringbar. Ferner läuft bei Drehbewegung D des Walzenmantels 4 der Walzenmantel 4 an der vorderen Stirnseite 14 auf die Dichtleiste 1 auf und an der hinteren Stirnseite 15 von dieser wieder ab. In Drehbewegungsrichtung D des Walzenmantels betrachtet ist die Schmiermittelrinne 5 vor der Dichtfläche 2 und die vordere Wandung 6 vor der hinteren Wandung 7 angeordnet.When used properly, the sealing strip 1, the sealing surface 2 for sealing the overpressure or underpressure zone against the inside 3 of a plurality of suction holes L comprehensive roll mantle 4 and at rotational movement D of the roll shell 4 with this in frictional contact. By means of the inside 3 of the roll shell 4 open towards the lubricant channel 5 is a lubricant-present in Shape of water in the inlet gap 8 between the sealing surface 2 and the inside 3 of the roll shell 4 can be brought. Furthermore, during rotary movement D of the roll mantle 4, the roll mantle 4 runs on the front face 14 on the sealing strip 1 and on the rear face 15 of this again on. Viewed in the direction of rotation D of the roll shell, the lubricant channel 5 is arranged in front of the sealing surface 2 and the front wall 6 in front of the rear wall 7.

Die Dichtleiste 1 hat ferner ein innerhalb der Dichtleiste 1 geführtes Schmiermittelverteilsystem mit einem sich in Längsrichtung der Dichtleiste 1 erstreckenden Schmiermittelzuführkanal 9 und einer Vielzahl von Steigleitungen 10 (von denen in der Darstellung der Figur 1 nur eine zu sehen ist). Die Steigleitungen 10 sind einendseitig mit der Schmiermittelrinne 5 und andernendseitig mit dem Schmiermittelzuführkanal 9 verbunden und in Längsrichtung des Schmiermittelkanals 5 nebeneinander angeordnet.The sealing strip 1 also has a guided within the sealing strip 1 Schmiermittelverteilsystem with extending in the longitudinal direction of the sealing strip 1 Schmiermittelzuführkanal 9 and a plurality of risers 10 (of which in the illustration of FIG. 1 only one can be seen). The risers 10 are connected at one end to the lubricant channel 5 and the other end to the lubricant supply channel 9 and arranged in the longitudinal direction of the lubricant channel 5 side by side.

Die in der Figur 1 gezeigte Dichtleiste 1 ist durch einen einen Grundkörper 11 bildenden ersten Materialabschnitt aus einem ersten Werkstoff sowie einem eine biegeelastische Lippe 12 bildenden zweiten Materialabschnitt aus einem zweiten Werkstoff gebildet. Hierbei stellt der Grundkörper 11 die hintere Wandung 7 mit der Dichtfläche 2 bereit. Ferner stellt die Lippe 12 die vordere Wandung 6 bereit. Der erste und der zweite Werkstoff unterscheiden sich vorliegend zumindest in den physikalischen Eigenschaften E-Modul, Abriebbeständigkeit und Reibungskoeffizient voneinander. Konkret umfasst der erste Werkstoff im Wesentlichen eine Gummi-Graphit Mischung und hat einen Graphitanteil von 60 Gew.-% und einem Gummianteil von 35 Gew.-% sowie weitere Bestandteile. Der zweite Werkstoff umfasst als wesentlichen Bestandteil Polyphenylenether (PPE ). Der erste Werkstoff hat einen E-Modul von ca. 14000 N/mm2 und der zweite Werkstoff hat einen E-Modul von ca. 2400N/mm2. Daher hat der zweite Werkstoff einen kleineren E-Modul als der erste Werkstoff.The in the FIG. 1 shown sealing strip 1 is formed by a base body 11 forming a first material portion of a first material and a bending elastic lip 12 forming the second material portion of a second material. Here, the main body 11, the rear wall 7 with the sealing surface 2 ready. Furthermore, the lip 12 provides the front wall 6. The first and the second material differ in the present case, at least in the physical properties modulus of elasticity, abrasion resistance and friction coefficient of each other. Specifically, the first material essentially comprises a rubber-graphite mixture and has a graphite content of 60% by weight and a rubber content of 35% by weight, and further constituents. The second material comprises as essential ingredient polyphenylene ether ( PPE ) . The first material has an E-modulus of approx. 14000 N / mm 2 and the second material has an E-modulus of approx. 2400N / mm 2 . Therefore, the second material has a smaller modulus of elasticity than the first material.

Ferner sind der erste Werkstoff und der zweite Werkstoff derart aufeinander abgestimmt, dass in einer Reibpaarung mit dem Werkstoff der Innenseite 3 des Walzenmantels 4 -dieser ist vorliegend Stahl- bei Gleitreibung einen kleineren Reibungskoeffizient -nämlich 0,125- als der zweite Werkstoff -nämlich 0,2- hat.Furthermore, the first material and the second material are matched to one another in such a way that in a friction pairing with the material of the inner side 3 of the roll shell 4 -this steel is in the case of sliding friction a smaller coefficient of friction - namely 0.125- as the second material-namely 0.2 - Has.

Wie aus der Darstellung der Figur 1 zu erkennen ist, ist die Lippe 12 derart ausgelegt, dass bei bestimmungsgemäßer Verwendung der Dichtleiste 1 im Zustand indem die Dichtfläche 2 gegen die Innenseite 3 des Walzenmantels 4 angestellt ist, die Oberkante 13 Lippe 12 gegen die Innenseite 3 des Walzenmantels 4 angestellt und mit dieser in Reibkontakt ist. Ferner verläuft die Lippe 12 in Bewegungsrichtung D des Walzenmantels 4 betrachtet gekrümmt. Dies kann dadurch entstehen, indem die Lippe 12 bereits gekrümmt gefertigt ist oder aber indem die Lippe ohne Eigenkrümmung aufgrund der Reibung mit der Walzenmantelinnenseite 3 eine diese krümmende Kraft erfährt. In zuletzt genannten Fall ist die Lippe vorliegend so gefertigt, dass deren Oberkante 13 im Zustand in dem die Dichtfläche 2 nicht an die Walzenmantelinnenseite 3 angestellt ist, in der Höhe über der Dichtfläche 2 übersteht.As from the representation of FIG. 1 can be seen, the lip 12 is designed so that when used properly the sealing strip 1 in the state by the sealing surface 2 is employed against the inside 3 of the roll shell 4, the upper edge 13 lip 12 against the inside 3 of the roll shell 4 and employed with this is in frictional contact. Furthermore, the lip 12 extends curved in the direction of movement D of the roll shell 4 viewed. This can be caused by the lip 12 is already made curved or by the lip without self-curvature due to the friction with the roll shell inner side 3 undergoes this curving force. In the latter case, the lip in the present case is made so that the upper edge 13 in the state in which the sealing surface 2 is not employed against the roll shell inner side 3 protrudes in height above the sealing surface 2.

Die Lippe kann vorliegend lösbar an einer Verbindungsstelle 20 mit dem Grundkörper 11 verbunden sein, bspw. kraftschlüssig in Form einer Schraubverbindung. Bei dem in der Figur 1 gezeigten Ausführungsbeispiel bildet der Grundkörper 11 des Weiteren die hintere Stirnseite 15 der Dichtleiste 1 aus.In the present case, the lip can be detachably connected to the base body 11 at a connection point 20, for example, in a force-locking manner in the form of a screw connection. In the in the FIG. 1 Shown embodiment, the main body 11 further forms the rear end face 15 of the sealing strip 1.

Des Weiteren hat der Grundkörper 11 eine Vorderseite die einen ersten Abschnitt 21, einen zweiten Abschnitt und einen dritten Abschnitt 22 hat, wobei der erste Abschnitt einen Teil der Schmiermittelrinne 5, der zweite Abschnitt die Verbindungsstelle 20 bereitstellt an der die Lippe 12 mit dem Grundkörper 11 verbunden ist und der dritte Abschnitt 22 einen Teil der vorderen Stirnseite 14 der Dichtleiste 1 bereitstellt.Furthermore, the base body 11 has a front side which has a first section 21, a second section and a third section 22, the first section providing a part of the lubricant channel 5, the second section providing the connection point 20 on which the lip 12 is connected to the main body 11 is connected and the third portion 22 provides a portion of the front end face 14 of the sealing strip 1.

Demzufolge wird vorliegend die vordere Stirnseite 14 der Dichtleiste 1 durch die Lippe 12 und den dritten Abschnitt 22 der Vorderseite des Grundkörpers 11 bereitgestellt. Des Weiteren ist erkennbar, dass an der vorderen Stirnseite 14 der Übergang zwischen der Lippe 12 und dem Grundkörper 11 eben ausgebildet ist, d.h. bspw. keine Stufe oder keinen Absatz bildet.Accordingly, in the present case, the front end face 14 of the sealing strip 1 is provided by the lip 12 and the third section 22 of the front side of the main body 11. Furthermore, it can be seen that at the front end face 14, the transition between the lip 12 and the base body 11 is flat, i. E. for example, does not form a stage or a paragraph.

Es ist zu bemerken, dass sich bei sämtlichen in den Figuren 1-4 gezeigten Dichtleisten 1, 1a, 1b, 1c die Schmiermittelrinne 5 von deren Boden zur Dichtfläche hin geneigt erstreckt, wobei die Neigung mit einer Horizontalen einen Winkel zwischen 20° und 70°einschließt. Ferner erstreckt sich bei allen in den Figuren 1-4 und 5 gezeigten Dichtleisten 1, 1a, 1b die Schmiermittelrinne 5 über den größten Teil der Länge der jeweiligen Dichtleiste 1, 1a, 1b, 1c.It should be noted that in all in the Figures 1-4 shown sealing strips 1, 1a, 1b, 1c, the lubricant channel 5 extends inclined from the bottom to the sealing surface, wherein the inclination with a horizontal angle between 20 ° and 70 ° includes. Furthermore, extends to all in the Figures 1-4 and 5 shown sealing strips 1, 1a, 1b, the lubricant channel 5 over most of the length of the respective sealing strip 1, 1a, 1b, 1c.

Bei den in den Figuren 2 bis 4 gezeigten alternativen Ausgestaltungen der erfindungsgemäßen Dichtleisten sollen nur auf die Unterschiede zu der in der Figur 1 gezeigten Dichtleiste 1 angesprochen werden.In the in the FIGS. 2 to 4 shown alternative embodiments of the sealing strips according to the invention are intended only to the differences from those in the FIG. 1 shown sealing strip 1 can be addressed.

Die in der Figur 2 gezeigte Dichtleiste 1a umfasst mehrere in Längsrichtung der Dichtleiste nebeneinander angeordnete Versteifungsrippen 16 gegen welche sich die Lippe 12a bei Drehbewegung D des Walzenmantels 4 abstützt indem die Lippe 12 mit den Versteifungsrippen 16 gegen die hintere Wandung 7 gedrückt wird. Vorliegend sind die Versteifungsrippen 16 an der Lippe 12a angeordnet.The in the FIG. 2 shown sealing strip 1a comprises a plurality of longitudinally of the sealing strip juxtaposed stiffening ribs 16 against which the lip 12a is supported during rotational movement D of the roll shell 4 by the lip 12 is pressed with the stiffening ribs 16 against the rear wall 7. In the present case, the stiffening ribs 16 are arranged on the lip 12a.

Wie aus der Darstellung der Figur 2 zu erkennen ist, ist die Lippe 12a derart ausgelegt, dass diese bei bestimmungsgemäßer Verwendung der Dichtleiste 1a im Zustand indem die Dichtfläche 2 gegen die Innenseite 3 des Walzenmantels 4 angestellt ist, die Oberkante 13 Lippe 12a zur Innenseite 3 des Walzenmantels 4 beabstandet ist, wobei der Abstand vorliegend 2-4 Millimeter beträgt. Ferner verläuft die Lippe 12a in Bewegungsrichtung D des Walzenmantels 4 betrachtet geneigt, wobei die Lippe 12a bereits geneigt gefertigt ist.As from the representation of FIG. 2 can be seen, the lip 12a is designed such that this is used when the sealing strip 1a is used as intended in that the sealing surface 2 against the inner side 3 of the roll shell 4, the upper edge 13 lip 12a to the inside 3 of the roll shell 4, wherein the distance here is 2-4 millimeters. Further, the lip 12a extends inclined in the direction of movement D of the roll shell 4, wherein the lip 12a is already made inclined.

Bei der in der Figur 2 gezeigten Dichtleiste 1a ist ferner zu erkennen, dass an der vorderen Stirnseite 14 der Übergang zwischen der Lippe 12a und dem Grundkörper 11 durch einen Absatz gebildet ist.When in the FIG. 2 shown sealing strip 1a is also to be seen that at the front end face 14 of the transition between the lip 12a and the base body 11 is formed by a paragraph.

Die in der Figur 3 gezeigte Dichtleiste 1b unterscheidet sich von der der Figur 2 lediglich dadurch, dass die vordere Stirnseite 14 vollständig durch die Lippe 12b' bereitgestellt wird. Hierdurch wird ebenfalls eine ebene vordere Stirnseite 14 bereitgestellt.The in the FIG. 3 shown sealing strip 1b differs from that of FIG. 2 merely in that the front end face 14 is completely provided by the lip 12b '. As a result, a flat front end side 14 is also provided.

Die Figur 4 zeigt eine weitere erfindungsgemäße Dichtleiste 1c in einer zu deren Längsrichtung senkrechten Querschnittsebene. Im Gegensatz zu den in den Figuren 1 bis 3 gezeigten Dichtleisten 1, 1a und 1b ist die Lippe 12c der in der Figur 4 gezeigten Dichtleiste 1c derart ausgebildet, dass sich diese bei bestimmungsgemäßer Verwendung im Wesentlichen in radialer Richtung des Walzenmantels 4 erstreckt. Die Figur 4 zeigt die Dichtleiste 1c aber in nicht eingebautem Zustand, d.h. ohne Walzenmantel.The FIG. 4 shows a further inventive sealing strip 1c in a direction perpendicular to the longitudinal direction of the cross-sectional plane. Unlike in the FIGS. 1 to 3 shown sealing strips 1, 1a and 1b, the lip 12c in the FIG. 4 Sealing strip 1c shown formed such that it extends when used properly in the radial direction of the roll shell 4 substantially. The FIG. 4 shows the sealing strip 1c but not installed, ie without roll shell.

Ferner -dies ist gleich wie bei der in der Figur 1 gezeigten Dichtleiste 1- weist der Grundkörper 11 eine Hinterseite auf, welche die hintere Stirnseite 15 der Dichtleiste 1c bereitstellt. Des Weiteren hat der Grundkörper 11 eine Vorderseite mit einem ersten Abschnitt 21, einem zweiten Abschnitt und einem dritten Abschnitt 22, wobei der erste Abschnitt 21 einen Teil der Schmiermittelrinne 5, der zweite Abschnitt die Verbindungsstelle des Grundkörpers 11 mit der Lippe 12c und der dritte Abschnitt 22 einen Teil der vorderen Stirnseite 14 der Dichtleiste 1c bereitstellt. Dies bedeutet, dass bei der in der Figur 4 gezeigten Ausführungsform die vordere Stirnseite 14 der Dichtleiste abschnittweise durch die Lippe 12c und abschnittweise durch den Grundkörper 11 gebildet ist, wobei an der vorderen Stirnseite 14 der Übergang zwischen der Lippe 12c und dem Grundkörper 11 eben, d.h. ohne Stufe oder Absatz ausgebildet ist. Ferner ist die hintere Stirnseite 15 der Dichtleiste 1c lediglich durch den Grundkörper 11 gebildet. Die in der Figur 4 gezeigte Dichtleiste 1c ist vorliegend lediglich aus dem Grundkörper 11 und der Lippe 12c gebildet, wobei der sich vom Rinnenboden zur Dichtfläche 2 erstreckende Abschnitt der Schmiermittelrinne 5 durch den ersten Abschnitt 21 des Grundkörpers 11 gebildet ist und als schiefe Ebene in einem Winkel von ca. 40°-50° zur Horizontalen geneigt verläuft.Furthermore, this is the same as in the FIG. 1 shown sealing strip 1, the base body 11 has a rear side, which provides the rear end face 15 of the sealing strip 1c. Furthermore, the main body 11 has a front side with a first portion 21, a second portion and a third portion 22, wherein the first portion 21 a part of the lubricant groove 5, the second portion, the junction of the main body 11 with the lip 12c and the third portion 22 provides a part of the front end face 14 of the sealing strip 1c. This means that when in the FIG. 4 shown embodiment, the front face 14 of the sealing strip in sections by the lip 12c and partially formed by the base body 11, wherein at the front end 14 of the transition between the lip 12c and the base 11 is flat, ie formed without step or step. Furthermore, the rear end face 15 of the sealing strip 1c is formed only by the main body 11. The in the FIG. 4 shown sealing strip 1c is present only formed from the main body 11 and the lip 12c, wherein which is formed by the groove bottom to the sealing surface 2 extending portion of the lubricant channel 5 through the first portion 21 of the base body 11 and inclined as an inclined plane at an angle of about 40 ° -50 ° to the horizontal.

Bei der in der Figur 4 gezeigten Dichtleiste 1c ist ferner die Lippe 12c mit dem Grundkörper 11 an der Verbindungsstelle 20 formschlüssig verbunden. Hierbei bildet die Verbindungsstelle 20 eine Schwalbenschwanzverbindung aus, die eine relative Bewegbarkeit von Lippe 12c und Grundkörper 11 in Längsrichtung der Dichtleiste 1c, d.h. bei deren bestimmungsgemäßen Verwendung in Maschinenquerrichtung der Walze, zulässt, aber eine relative Beweglichkeit in andere Richtungen als die vorgenannte im Wesentlichen oder vollständig verhindert. Diese Ausgestaltung ist insbesondere dann sinnvoll, wenn die Lippe 12c und der Grundkörper 11 in Längsrichtung der Dichtleiste 1c eine zueinander unterschiedliche thermische Längenausdehnung haben.When in the FIG. 4 sealing strip 1c shown is also the lip 12c with the main body 11 at the junction 20 positively connected. In this case, the connection point 20 forms a dovetail connection, which permits relative movability of the lip 12c and base body 11 in the longitudinal direction of the sealing strip 1c, ie when used in the cross-machine direction of the roller as intended, but a relative mobility in other directions than the aforementioned essentially or completely prevented. This embodiment is particularly useful if the lip 12c and the base body 11 in the longitudinal direction of the sealing strip 1c have a mutually different thermal expansion.

Die Figur 5 zeigt die Lippe 12a oder 12b in perspektivischer Ansicht mit den mehreren in Längsrichtung der Lippe 12a, 12b nebeneinander angeordneten Versteifungsrippen 16.The FIG. 5 shows the lip 12a or 12b in a perspective view with the plurality of longitudinally of the lip 12a, 12b juxtaposed stiffening ribs 16th

Die Figur 6 zeigt eine erfindungsgemäße Saugwalze 18 für eine Bahnmaterial verarbeitende und/oder herstellende Maschine, insbesondere Papier-, Karton- oder Tissuemaschine, in einer Querschnittsebene senkrecht zur Längsrichtung der Saugwalze 18. Zu bemerken ist, dass die Längsrichtung der Dichtleiste 1 oder 1a oder 1b oder 1c und die der Saugwalze 18 zusammenfallen.The FIG. 6 shows a suction roll according to the invention 18 for a web material processing and / or manufacturing machine, in particular paper, board or Tissuemaschine, in a cross-sectional plane perpendicular to the longitudinal direction of the suction roller 18. It should be noted that the longitudinal direction of the sealing strip 1 or 1a or 1b or 1c and the suction roll 18 coincide.

Gemäß dem zweiten Aspekt der Erfindung weist die Saugwalze 18 zumindest eine Dichteinrichtung 17 zur Abdichtung einer Unterdruckzone V der Saugwalze 18 gegenüber der Umgebung U auf. Hierbei umfasst die Dichteinrichtung 17 zumindest eine Dichtleiste 1, 1a, 1b oder 1c -vorliegend zwei erfindungsgemäße Dichtleisten. Die beiden Dichtleisten 1, 1a oder 1b sind erfindungsgemäß in der Saugwalze 18 in der Querschnittsebene bzw. in einer durch die Drehbewegung D des Walzenmantels 4 aufgespannten Ebene betrachtet in einer 7 Uhr bis 12 Uhr Position bei Drehung in Uhrzeigersinn und in einer 5 Uhr bis 12 Uhr Position bei Drehung gegen den Uhrzeigersinn eingebaut.According to the second aspect of the invention, the suction roll 18 has at least one sealing device 17 for sealing a vacuum zone V of the suction roll 18 with respect to the surroundings U. Here, the sealing device 17 comprises at least one sealing strip 1, 1a, 1b or 1c-present two sealing strips according to the invention. The two sealing strips 1, 1a or 1b are according to the invention in the suction roller 18 in the cross-sectional plane or in a plane defined by the rotational movement D of the roll shell 4 plane in a 7 o'clock to 12 o'clock position in clockwise rotation and in a 5 o'clock to 12 Clock position built in counterclockwise rotation.

In der in der Figur 6 gezeigten Ausführungsform erfolgt die Drehung D des Walzenmantels in Uhrzeigersinn und die beiden Dichtleisten 1, 1a, 1b oder 1c sind in einer 10 Uhr Position in die Walze 18 eingebaut. Die beiden Dichtleisten 1, 1a, 1b oder 1c sind bestimmungsgemäß in die Walze 18 eingebaut, d.h. in der Drehbewegungsrichtung D des Walzenmantels 4 betrachtet ist die Schmiermittelrinne 5 vor der Dichtfläche 2 und die vordere Wandung 6 vor der hinteren Wandung 7 angeordnet.In the in the FIG. 6 In the embodiment shown, the rotation D of the roll mantle is in a clockwise direction and the two sealing strips 1, 1a, 1b or 1c are installed in the roll 18 in a 10 o'clock position. The two sealing strips 1, 1a, 1b or 1c are installed as intended in the roller 18, ie viewed in the rotational movement direction D of the roll shell 4, the lubricant groove 5 is arranged in front of the sealing surface 2 and the front wall 6 in front of the rear wall 7.

Claims (15)

  1. Suction or blower roll for a machine for processing and/or producing web material, in particular a paper, board or tissue machine, having a sealing device (17) for sealing off a positive- or negative-pressure zone of the suction or blower roll, wherein the sealing device (17) comprises at least one sealing strip, wherein the sealing strip (1, 1a, 1b, 1c) has a front end side (14) and a rear end side (15) and a top side (19) extending between the two end sides, wherein the top side (19) provides a sealing surface and a lubricant channel (5) formed by a cutout in the sealing strip (1, 1a, 1b, 1c), and at the level of the lubricant channel (5), a front wall (6) is formed between the front end side and the lubricant channel (5) and a rear wall (7) providing the sealing surface (2) is formed between the lubricant channel (5) and the rear end side, said rear wall (7) having a greater wall thickness than the front wall (6), wherein, when the sealing strip is used as intended, the sealing surface (2) is able to be placed against the inner side of the roll shell in order to seal off the positive- or negative-pressure zone, and a lubricant is introducible into the inlet gap between the sealing surface (2) and the inner side of the roll shell by means of the lubricant channel (5), and during a rotary movement of the roll shell, the roll shell runs onto the sealing strip at the front end side and runs off same again at the rear end side, characterized in that the sealing strip (1, 1a, 1b, 1c) comprises a first material portion, made of a first material, that provides the rear wall (7) in the region of the sealing surface (2) and a second material portion, made of a second material, that at least partially provides the front wall (6), and the first and the second material differ from one another in at least one physical property, such as modulus of elasticity, abrasion resistance, hardness, brittleness, for example, and wherein the first material portion forms a main body (11) that provides the rear wall (7) having the sealing surface (2) and the second material portion forms a lip (12) that provides the front wall (6), said lip (12) being connected to the main body (11) at a connecting point (20).
  2. Suction or blower roll according to Claim 1, characterized in that the second material has a lower modulus of elasticity than the first material.
  3. Suction or blower roll according to either of the preceding claims, characterized in that the first material is brittler and/or harder than the second material.
  4. Suction or blower roll according to one of the preceding claims, characterized in that the first material and the second material are coordinated with one another such that, in a friction pairing with the material of the inner side (3) of the roll shell (4), the first material has a lower coefficient of friction than the second material.
  5. Suction or blower roll according to one of the preceding claims, characterized in that the first material and the second material are coordinated with one another such that, in a friction pairing with the material of the inner side (3) of the roll shell (4), the first material exhibits greater abrasion resistance than the second material.
  6. Suction or blower roll according to one of the preceding claims, characterized in that the first material comprises a rubber/graphite mixture as essential constituent.
  7. Suction or blower roll according to one of the preceding claims, characterized in that the second material comprises a plastic, in particular polyphenylene ether (PPE), as essential constituent.
  8. Suction or blower roll according to one of the preceding claims, characterized in that the lip (12) is designed such that, when the sealing strip (1, 1a, 1b, 1c) is used as intended, in the state in which the sealing surface (2) has been placed against the inner side (3) of the roll shell (4), the top edge (13) of the lip (12) is placed against the inner side (3) of the roll shell (4) or is spaced apart from the inner side (3) of the roll shell (4) by at most 10 millimetres, preferably at most 4 millimetres.
  9. Suction or blower roll according to one of the preceding claims, characterized in that the rear wall (7) extends from the deepest point of the lubricant channel (5) to the sealing surface (2) in an inclined manner, wherein the inclination is directed towards the rear end side, and in particular encloses an angle of between 20° and 70°, in particular between 30° and 50°, with a horizontal.
  10. Suction or blower roll according to one of the preceding claims, characterized in that the lip (12) is releasably connected to the main body (11), and in particular is connected to the main body (11) in a force-fitting and/or form-fitting manner.
  11. Suction or blower roll according to one of the preceding claims, characterized in that a plurality of reinforcing ribs that are arranged next to one another in a longitudinal direction of the sealing strip (1, 1a, 1b, 1c) are provided, the lip (12) being supported on said reinforcing ribs during a rotary movement of the roll shell.
  12. Suction or blower roll according to one of the preceding claims, characterized in that the lubricant channel (5) extends along the majority of the length of the sealing strip (1, 1a, 1b, 1c).
  13. Suction or blower roll according to one of the preceding claims, characterized in that, at the front end side, the transition between the lip (12) and the main body (11) is formed in a planar manner.
  14. Suction (18) or blower roll according to one of Claims 1-13, wherein the sealing strip (1, 1a, 1b, 1c) is installed in the suction or blower roll in a 7 o'clock to 12 o'clock position, as seen in a plane defined by the rotary movement of the roll shell, when the direction of rotary movement of the roll shell is clockwise and in a 5 o'clock to 12 o'clock position when the direction of rotary movement of the roll shell is anticlockwise.
  15. Method for sealing off a positive- or negative-pressure zone of a suction (18) or blower roll by means of a sealing device, wherein the sealing device (17) comprises at least one sealing strip (1, 1a, 1b, 1c) which has a front end side (14) and a rear end side (15) and a top side (19) extending between the two end sides, wherein the top side (19) provides a sealing surface (2) and a lubricant channel (5) formed by a cutout in the sealing strip (1, 1a, 1b, 1c), and at the level of the lubricant channel (5), a front wall (6) is formed between the front end side and the lubricant channel (5) and a rear wall (7) providing the sealing surface (2) is formed between the lubricant channel (5) and the rear end side, said rear wall (7) having a greater wall thickness than the front wall (6), wherein the sealing surface (2) is placed against the inner side (3) of the roll shell (4) in order to seal off the positive- or negative-pressure zone, and a lubricant is introduced into the inlet gap (8) between the sealing surface (2) and the inner side (3) of the roll shell (4) by means of the lubricant channel (5), and wherein, during a rotary movement of the roll shell, the roll shell runs onto the sealing strip (1, 1a, 1b, 1c) at the front end side and runs off same again at the rear end side, characterized in that the suction or blower roll is embodied in accordance with one of Claims 1 to 14.
EP14723078.3A 2013-07-19 2014-05-12 Suction or blowing roll having a sealing strip Active EP3022356B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013214177 2013-07-19
PCT/EP2014/059591 WO2015007414A1 (en) 2013-07-19 2014-05-12 Sealing strip for a paper, paperboard or tissue machine, consisting of multiple materials

Publications (2)

Publication Number Publication Date
EP3022356A1 EP3022356A1 (en) 2016-05-25
EP3022356B1 true EP3022356B1 (en) 2018-10-03

Family

ID=50687497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14723078.3A Active EP3022356B1 (en) 2013-07-19 2014-05-12 Suction or blowing roll having a sealing strip

Country Status (4)

Country Link
US (1) US9708768B2 (en)
EP (1) EP3022356B1 (en)
CN (1) CN105392941B (en)
WO (1) WO2015007414A1 (en)

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JP7016100B2 (en) * 2020-02-04 2022-02-04 株式会社長谷川鉄工所 Sealing device for suction rolls
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Also Published As

Publication number Publication date
WO2015007414A1 (en) 2015-01-22
US20160153141A1 (en) 2016-06-02
CN105392941A (en) 2016-03-09
US9708768B2 (en) 2017-07-18
EP3022356A1 (en) 2016-05-25
CN105392941B (en) 2017-08-22

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