Classifications

• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
  • D21F3/00—Press section of machines for making continuous webs of paper
  • D21F3/02—Wet presses
  • D21F3/10—Suction rolls, e.g. couch rolls
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
  • D21F7/00—Other details of machines for making continuous webs of paper
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16J—PISTONS; CYLINDERS; SEALINGS
  • F16J15/00—Sealings
  • F16J15/16—Sealings between relatively-moving surfaces
  • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
  • F16J15/3296—Arrangements for monitoring the condition or operation of elastic sealings; Arrangements for control of elastic sealings, e.g. of their geometry or stiffness
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
  • D21F1/00—Wet end of machines for making continuous webs of paper
  • D21F1/48—Suction apparatus
  • D21F1/50—Suction boxes with rolls

Definitions

• the invention relates to a sealing strip system with at least one sealing strip for sealing a suction zone of an evacuated roll of a machine for the production and / or processing of a fibrous web and a sealing strip for such a sealing strip system.
• Sealing strips are required in paper machines in suctioned rolls, which have one or more vacuum zones, in order to maintain the vacuum.
• the sealing strips are subject to some wear during the sealing process since they are pressed against the rotating roller shell of the roller. If the sealing strips are worn continuously or only partially over the maximum wear dimension, this can lead to a break in the vacuum and thus to problems during operation of the paper machine. In the worst case, the paper machine must be turned off for a roll change.
• suction rolls are therefore replaced preventively and then overhauled according to plan in order to preventively replace the sealing strips as a rule long before the maximum wear potential is reached. Sealing strip wear is in many cases the main reason for changing the rollers.
• the construction-related anyway thin or narrow sealing strip is further weakened by the cleavage due to the longitudinal direction of the sealing strip groove along the axis of wear, whereby the sealing strip due to the friction forces generated by the roller can break across the groove, which A failure of the sealing strip and an unplanned machine downtime would result.
• the invention is therefore based on the object to provide a sealing strip system of the type mentioned, in which the aforementioned disadvantages are eliminated.
• a monitoring of the respective state of wear over the length of the sealing strip should be ensured as precisely as possible and reproducible.
• the sealing strip system comprises at least one sealing strip for sealing a suction zone of an evacuated roll of a machine for the production and / or processing of a fibrous web, the sealing strip having a wear volume which is successively removed by tribological contact with the roll.
• the sealing strip system according to the invention comprises a sensor system for detecting the respective state of wear of the sealing strip as well as an evaluation unit which can be connected to the sensor system.
• the sensor system is embedded in at least one sensor channel extending at least partially within the sealing strip or also on the sealing strip in the region of the wear volume over at least substantially the entire length of the sealing surface of the sealing strip, and over at least one of those on the provided from the side facing away from the sealing surface of the wear volume lower portion of the sealing strip from this executed connection with the evaluation unit and / or a unit for Ver ⁇ supply of the sensor with a medium serving to generate information connectable.
• the term of the sensor channel can be understood very broadly in the context of this invention. Thus, not only such a channel should be understood, in which the sensor system runs completely inside the sealing strip, or in a recess of the sealing strip. The term should also include such embodiments in which only parts of the sensor in a recess of the sealing strip, while other parts extend outside of the sealing strip.
• the sensor channel in the context of this application can also be provided on the sealing strip.
• a sensor channel can, for example, be designed in the form of a hose, which is provided on the outside of the sealing strip, and which receives sensor technology.
• a respective sensor channel is introduced into the sealing strip by a longitudinal groove, in particular groove-shaped.
• the senor is fixed by an adhesive and / or positive, force and / or material fit in the at least one sensor channel.
• at least one sensor channel is introduced from an end face of the sealing strip into the sealing strip.
• At least one sensor channel can also be introduced into the sealing strip from one longitudinal side, in particular from the side of the sealing strip facing the suction zone.
• At least one sensor channel can also be introduced into the sealing strip from the rear or rear side facing away from the suction zone or from the front side of the sealing strip.
• At least one sensor channel is arranged at the level of a predetermined wear point in the sealing strip.
• the sensor arranged in the relevant sealing strip responds. It can then be decided whether the sealing strip has already been replaced or is still waiting for another further point of wear, which may also be monitored by the sensor system, to be reached.
• the sealing strip is arranged with at least two sensor channels extending at different distances from the sealing surface, each within the sealing strip in its longitudinal direction in the region of the wear volume over at least substantially the entire length of the sealing surface of the sealing strip Provided.
• the wear state of the sealing strip can be monitored more precisely over its operating time, so that it is possible to wait until the maximum wear has been reached before replacement of the sealing strip.
• the sensor system may comprise at least one wire, conductor and / or light conductor extending in a respective sensor channel.
• the medium serving to generate the information may in particular comprise electricity and / or light.
• the medium which serves to generate the information may also comprise a gas and / or fluid guided in a respective sensor channel or a tube, hose or the like arranged in the sensor channel.
• the at least one connection of the sensor system to the evaluation unit and / or the unit for supplying the sensor with a medium serving to generate information is provided via the lower area provided on the side of the wear volume facing away from the sealing surface the sealing strip led out of the sealing strip.
• the at least one connection of the sensor system to the evaluation unit and / or the unit for supplying the sensor with a medium serving to generate information can advantageously be provided from a longitudinal side via the lower region of the sealing strip provided on the side of the wear volume facing away from the sealing side the sealing strip must be led out of the sealing strip.
• connection can be guided inside the suction zone of the roller.
• supply lines out there such as Compressed air lines for pressure hoses of the strips or similar, with which the connections can be brought together simply and expediently.
• the compounds can also be easily guided out of the roller on one end side of the roller
• connection of the sensor system with the evaluation unit and / or the unit for supplying the sensor system with a medium serving to generate information expediently comprises at least one gas, fluid, current and / or light line and / or at least one gas, fluid, , Power and / or light connection.
• connection of the sensor system with the evaluation unit and / or the unit for supplying the sensor system with an information-generating medium may also include at least one anti-buckling device, in particular at least one tube angle or the like.
• protection may be provided on the sealing strip or on the sealing strip holder or the suction box, which protects the sensor line outside the sealing strip against damage, e.g. can be caused by the vacuum flow, water or fiber material accumulation or batzen or other contamination in the suction roll.
• connection of the sensor with the evaluation unit and / or the unit for supplying the sensor with one of the information generating the nenden medium in an area led out of the sealing strip viewed in the direction of the axis of the expected wear a predetermined minimum safety distance to Has a maximum worn sealing surface of the sealing strip and / or viewed in the longitudinal direction of the sealing strip from a respective end face of the sealing strip has a dependent of the adjustment of the suction zone in the region of this end face-sealing format delimiter distance.
• the format limiter of a suction roller is movable in order to be adapted to the actual paper web width.
• the sensor for wear monitoring is led out of the sealing strip on the same side as the format limiter, the sensor in the sealing strip must be guided to the end of the sealing strip and from there back to the point in the sealing strip Format Whitneyer can not be moved. This ensures that the area of the format delimiter can also be monitored.
• the sealing strip is provided with a recess serving for limiting the stroke. Furthermore, it may be advantageously provided that the connection of the sensor system to the evaluation unit and / or the sensor supply unit is led out of the sealing strip in a region serving for the generation of information, which is to be expected both in the direction of the axis of the sensor. considered wear a predetermined minimum safety distance (d) to the maximum worn sealing surface of the sealing strip as well as in the longitudinal direction (L) of the sealing strip viewed from a respective end face (52) of the sealing strip (32) one of the adjustment of a suction in the region of this Front side sealing Begrenzungsbegrenzers dependent distance (X) has.
• the distance X can advantageously be at least 5 cm, in particular at least 10 cm, preferably at least 15 cm.
• the lead-out from the strip on one of the longitudinal sides of the sealing strip may be particularly advantageous if the connection of the sensor with the evaluation and / or the unit for supplying the sensor with one of the information generating the nenden medium is led out on that longitudinal side of the sealing strip, which is directed to a suction zone. This allows the connections to be easily continued within the suction zone. In this way, existing conventional sealing strip systems can be easily retrofitted, since in the interior of a suction zone usually sufficient space is available for the laying of lines or hoses
• the sealing strip has at least two sensor channels which are each introduced from a longitudinal side, in particular from the same longitudinal side in the sealing strip, each of the at least two sensor channels each in height of a predetermined wear point in the sealing strip is arranged.
• connections to / from the sensors can be led out of the sealing strip on the same longitudinal side.
• you have the design of the wiring inside the bar a greater freedom. For example, an embodiment as shown in Figure 7, is very difficult to implement.
• sealing strip for a sealing strip system according to one aspect of the invention.
• a deratige sealing strip has a wear volume, which is successively ablated by tribological contact with a rotating roller, and a sensor for detecting the respective state of wear of the sealing strip.
• the sensor system is embedded in at least one sensor channel extending at least partially within the sealing strip or also at the sealing strip in its longitudinal direction (L) in the region of the wear volume over at least substantially the entire length of the sealing surface of the sealing strip.
• Means are provided via at least one lower region of the sealing strip provided on the side of the wear strip facing away from the sealing surface, with the sensor system in or on the sealing strip with an evaluation unit (36) and / or a unit for supplying the sensor system to connect to an information-generating medium.
• sealing strip system or the sealing strip can also have further functional elements.
• the sealing strip comprises means to transport a lubricating fluid.
• a supply line provided in or on the bar may include lubricant.
• such a sealing strip or the sealing strip system may comprise a lubricant channel, which is advantageously connected or connectable to a supply line, and which is configured such that, when the lubricant channel is operating with lubricating fluid, e.g. Water - is filled, lubricant between the rotating roller and the sealing surface of the sealing strip can be brought.
• a lubricant trough can be provided in or on the sealing strip (for example, by a depression in the sealing surface). However, it can also be provided elsewhere in the sealing strip system.
• 1 is a schematic end view of a conventional sealing power system with an extending in the direction of the axis of the expected wear sensor groove
• FIG. 2 shows a schematic end view of an exemplary embodiment of a sealing strip system according to the invention with a sealing strip according to an aspect of the invention with groove-shaped sensor channels provided with hoses from the front side of the sealing strip and provided with hoses,
• FIG. 3 shows a schematic end view of a part of an exemplary embodiment of a sealing strip system according to the invention with groove-shaped sensor channels introduced into the sealing strip from the rear side of the sealing strip a provided in the sealing strip, the stroke limitation serving recess,
• FIG. 4 is an enlarged partial schematic representation of an exemplary embodiment of a sealing strip system according to the invention with introduced from the back of the sealing strip forth in the sealing strip groove-shaped sensor channels,
• Fig. 5 is an enlarged partial schematic representation of a with the
• Embodiment of FIG. 4 comparable further in exemplary embodiment of an inventive
• Sealing strip system with introduced from the back of the sealing strip ago in the sealing strip groove-shaped sensor channels and associated hoses,
• Fig. 6 is a schematic guide side rear view of a game-like embodiment of an inventive
• Fig. 7 is a schematic guide side rear view of a game-like embodiment of an inventive
• Fig. 8 is a partial schematic representation of the course of the
• Sensor channels of the sealing strip system according to FIG. 7 alternative, exemplary space-optimized course of the sensor channels in the sealing strip according to FIG. 7.
• 1 shows a schematic end view of a conventional sealing strip system 10 with a sealing strip 16 arranged in a sealing strip holder 12 and acted upon by a pressure hose 14 with a sensor groove 20 extending in the direction of the axis 18 of the expected wear for receiving a wear monitoring device; at least one sensor comprising sensor 22.
• FIGS. 2 to 8 show exemplary embodiments of a sealing strip system according to the invention.
• Dichtleis tensystems 30 each comprise again in a (not shown) Dichtleis tenhalter arranged by a (not shown) Anpressschlauch or the same acted upon sealing strip 32 for sealing a suction zone of a sucked roller of a machine for Fier thoroughly and / or processing a fibrous web, wherein the sealing strip 32 in each case has a wear volume which is successively removed by tribological contact with the roller.
• the various embodiments of the sealing strip system 30 each include a sensor 34 for detecting a respective state of wear of the sealing strip 32 and connectable to the sensor 34 evaluation unit 36.
• the sensor 34 is in each case at least one within the sealing strip 32 in the longitudinal direction L in Range of wear volume over at least substantially the entire length of the sealing surface 38 of the sealing strip 32 extending sensor channel 40 embedded and over at least one over the on the side facing away from the sealing surface 38 of the wear volume lower portion of the sealing strip 32 led out of this connection 42 the evaluation unit 36 and / or a unit for the supply of the sensor 34 with a the information generation serving medium connectable.
• a respective sensor channel 40 can be introduced into the sealing strip 32 in each case by a longitudinal groove which is in particular groove-shaped.
• the sensor 34 may be fixed, for example, by an adhesive and / or positive, force and / or material fit in the at least one sensor channel 40.
• at least one sensor channel 40 may be introduced into the sealing strip 32 from one end face of the sealing strip 32.
• sealing strip system 30 according to the invention are also possible in which at least one sensor channel is separated from a longitudinal side, in particular from the rear or rear side facing away from the suction zone (see FIGS. 3 to 7) or front side (FIG. see Fig. 2), the sealing strip 32 is introduced forth in the sealing strip 32.
• At least one sensor channel 40 in the amount of a predetermined point of wear in the sealing strip 32 can be arranged.
• a respective sealing strip 32 may in particular be arranged with at least two at different distances to the sealing surface 38, in each case within the sealing strip 32 in the longitudinal direction L in the region of the wear volume be provided over at least substantially the entire length of the sealing surface 38 of the sealing strip 32 extending sensor channels 40.
• the respective sensor 34 may, for example, comprise at least one wire, conductor and / or light conductor extending in a respective sensor channel 40.
• the information-generating medium may comprise, in particular, electricity and / or light.
• the medium for obtaining information may, in particular, also comprise a gas and / or fluid guided in a respective sensor channel 40 or a tube, hose 44 (see FIGS. 2, 3 and 5) or the like arranged therein.
• the at least one connection 42 of the sensor system 34 with the evaluation unit 36 and / or the unit for supplying the sensor 34 with a medium serving to generate information can in particular be provided via the lower region of the wearer's side provided on the side of the wear volume facing away from the sealing surface 38 Sealing strip 32 may be brought out of the sealing strip 32 (see in particular FIGS. 6 and 7).
• the at least one connection 42 of the sensor system 34 with the evaluation unit 36 and / or the unit for supplying the sensor 34 with a medium serving to generate information can be provided via the lower region of the sealing strip 32 on the side of the wear volume facing away from the sealing surface 38 be led out of the sealing strip 32, for example, from one longitudinal side, in particular from the rear or rear side 46 of the sealing strip 32 facing away from the suction zone (cf., in particular, FIGS. 6 and 7).
• tion serving medium for example, comprise at least one gas, fluid, electricity and / or light pipe and / or for example at least one gas, fluid, power and / or light connection.
• the respective connection 42 of the sensor system 34 with the evaluation unit 36 and / or the unit for supplying the sensor 34 with a medium serving for information generation can have at least one kink protection 48 such as at least one tube angle or the like.
• a respective connection 42 of the sensor system 34 with the evaluation unit 36 and / or the unit for supplying the sensor system 34 with a medium serving for information generation can be led out of the sealing strip 32 in one area which, viewed in the direction of the axis 50 of the expected wear, has a predetermined minimum safety distance d from the maximum worn sealing surface 38 'of the sealing strip 32 and / or viewed in the longitudinal direction L of the sealing strip 32 from a respective end face 52 of the sealing strip 32 has a distance X which is dependent on the adjustment path of a format limiter which seals the suction zone in the region of this end face 52.
• Such a distance X is usually more than 5 cm, in particular more than 10 cm, preferably 20 cm or more.
• FIG. 2 shows, in a schematic end view, an exemplary embodiment of a sealing strip system 30 according to the invention with two groove-shaped sensor channels 40 accommodating the sensor system 34 from the front side 54 of the sealing strip 32.
• a schematic representation of the sealing strip 32 record the sealing strip holder 56 and 32 provided for acting on the sealing strip 32 provided pressure tube.
• the groove-shaped sensor channels 40 are designed so that at least one sensor channel 40 receive only part of the sensor 34, while a part of the sensor 34 protrudes from the sealing strip 32.
• Such a sensor channel 40 configured in this way may be advantageous since only a smaller recess in the sealing strip 32 has to be created for this purpose.
• the sensor 40 is relatively large, this can be advantageous for the stability of the strip 32.
• at least one sensor 34 is provided in the form of a tube which is provided without a groove on the outside of the sealing strip.
• FIG. 3 shows a schematic end view of part of an exemplary embodiment of a sealing strip system 30 according to the invention with two groove-shaped sensor channels 40 introduced into the sealing strip 32 from the rear side 46 of the sealing strip 32, into each of which a tube 34 assigned to the sensor system 34 is inserted , which is glued in the respective sensor channel 40, for example, in each case.
• the sealing strip 32 is provided with a recess 60 serving for limiting the stroke.
• the recess 60 may have a predeterminable distance 62 to the hose 44 adjacent to the sealing surface 38, which in the present case is at least 5 mm, for example. In principle, however, a different minimum value can also be selected for the distance 62.
• FIG. 4 shows, in an enlarged partial view, an exemplary embodiment of a sealing strip system 30 according to the invention with two groove-shaped sensor channels 40 introduced into the sealing strip 32 from the rear side 46 of the sealing strip 32, which are oriented in the direction of the axis 50 of the expected wear. strives at different distances di or 02 are arranged by the sealing surface 38.
• the distance di is, for example, in the range of 3 mm and the distance 02 is, for example, in the range of 5.6 mm.
• the width b of the respective sensor channel 40 in the direction of the axis 50 of the expected wear is in the present case, for example, in the range of any because 1, 6 mm.
• the values given are purely exemplary. Thus, the relevant dimensions may differ from the specified values.
• FIG. 5 shows a further enlarged schematic partial representation of an exemplary embodiment of a sealing strip system 30 according to the invention comparable to the embodiment according to FIG. 4 with groove-shaped sensor channels 40 introduced from the rear side 46 of the sealing strip 32 into the sealing strip 32 and the tubes 44 of the sensor 34 associated therewith
• the sensor channels 40 are introduced, for example, into the sealing strip 32 and the hoses 44 introduced into them are selected, for example, such that the hose 44 inserted in the sensor channel 40 closest to the sealing surface 38 is subject to wear in the hose Range of 40% of the maximum wear and, for example, at a wear in the range of 3.2 mm responds, while in the larger distance from the sealing surface 38 having senorikanal 40 used hose 44, for example in the range of 15% above half the maximum worn Dic surface or at wear in the range of 6.8 mm.
• the ranges and values given are purely exemplary. In principle, deviating areas and values are also conceivable.
• FIG. 6 shows a schematic rear side view of an exemplary embodiment of a sealing strip system 30 according to the invention without monitoring the format restrictor area on the guide side
• FIG. 7 shows a corresponding view of a sealing strip system 30 according to the invention with monitoring of the format restrictor area on the guide side is shown.
• connection 42 of the sensor system 34 with the evaluation unit 36 and / or the unit for supplying the sensor 34 with a medium serving for information generation is led out of the sealing strip 32 in each case in the direction of the axis 50 of FIG expected wear considered a predetermined minimum safety distance d to the maximum worn Sealing surface 38 'of the sealing strip 32 and / or in the longitudinal direction L of the sealing strip 32 viewed from a respective end face 52 of the sealing strip 32 has a dependent of the adjustment of a suction zone in the region of this end face 52 of the format delimiter dependent distance X.
• the distance X between the end face 52 and the area in which the connection 42 is led out of the sealing strip 32 is greater than in the embodiment in accordance with FIG. 7 with monitoring of the format limiter area on the guide side.
• the minimum safety distance d between the maximum worn sealing surface 38 'and the region in which the connection 42 is led out of the sealing strip 32 is, for example, at least 8 mm in both cases. Basically, however, another minimum value is conceivable.
• the minimum radius of curvature R m in the sensor channels 40 provided in the embodiments according to FIGS. 6 and 7, for example as hose channels, is, for example, in the range of 6 mm, whereby here again, in principle, other values are conceivable.
• the maximum wear is for example 8 mm. Again, however, other values are conceivable.
• FIG. 8 shows a schematic partial representation of an alternative to the course of the sensor channels 40 of the sealing strip system 30 according to FIG 7, in which the sensor channels 40 are initially bent downwards in the region of the front side 52 and upward again after a section extending in the longitudinal direction L of the sealing strip 32 are.
• Width of a respective sensor channel Minimum safety distance to the maximum worn sealing surface

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Sealing Devices (AREA)
• Paper (AREA)

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• 2018
  • 2018-03-08 DE DE102018105313.4A patent/DE102018105313A1/de active Pending
• 2019
  • 2019-01-29 CN CN201980017583.XA patent/CN111886379B/zh active Active
  • 2019-01-29 WO PCT/EP2019/052030 patent/WO2019170321A1/de active Application Filing
  • 2019-01-29 EP EP19703262.6A patent/EP3762541A1/de active Pending
  • 2019-01-29 US US16/971,541 patent/US11365514B2/en active Active

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