EP3194655B1 - Sealing strip system for a suction roll - Google Patents
Sealing strip system for a suction roll Download PDFInfo
- Publication number
- EP3194655B1 EP3194655B1 EP15781852.7A EP15781852A EP3194655B1 EP 3194655 B1 EP3194655 B1 EP 3194655B1 EP 15781852 A EP15781852 A EP 15781852A EP 3194655 B1 EP3194655 B1 EP 3194655B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sealing ledge
- sealing
- sealing strip
- ledge
- roll shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007789 sealing Methods 0.000 title claims description 244
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 230000001105 regulatory effect Effects 0.000 claims description 27
- 239000007921 spray Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 6
- 238000005461 lubrication Methods 0.000 claims 2
- 230000001050 lubricating effect Effects 0.000 description 32
- 238000000034 method Methods 0.000 description 12
- 230000033228 biological regulation Effects 0.000 description 9
- 230000007246 mechanism Effects 0.000 description 9
- 230000008901 benefit Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
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- 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
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/48—Suction apparatus
-
- 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
- D21F1/483—Drainage foils and bars
-
- 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
-
- 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
-
- 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
- D21F3/0272—Wet presses in combination with suction or blowing devices
-
- 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
- D21F3/0281—Wet presses in combination with a dryer roll
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
- D21F5/04—Drying on cylinders on two or more drying cylinders
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
- D21F5/04—Drying on cylinders on two or more drying cylinders
- D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices
-
- 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
- D21F1/10—Wire-cloths
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0009—Paper-making control systems
- D21G9/0036—Paper-making control systems controlling the press or drying section
Definitions
- the invention relates to sealing strip systems for suction rolls.
- a suction roll which is used for dewatering web material, for example in paper machines, has a roll shell provided with openings and at least one suction box inside.
- the suction box is fixedly mounted inside the suction roll, with the roll shell provided with holes rotating around the suction box.
- it has sealing strips on the side, which seal the interior of the suction box against the remaining volume of the suction roll, specifically in the longitudinal direction of the suction roll.
- the suction box In the circumferential direction of the suction roll, the suction box is delimited at both ends by size limiters and sealed off from the roll shell.
- a sealing strip is known which is pressed by a loading element in the form of a pressure hose against the inner wall of the suction roll as long as the vacuum is built up in the suction box.
- the sealing strip is moved slightly away from the inner wall of the suction roll by a restoring element, also in the form of a pressure hose, so that a defined, adjustable sealing gap results.
- a restoring element also in the form of a pressure hose
- the EP 1344865 B1 shows a suction roll in which the inside of the suction roll in the area behind the rear sealing strip of the A microphone is attached to the suction box. If the measured sound level exceeds a limit value, countermeasures are initiated, which can consist of changing the distance between the sealing strip and the inner wall and / or changing the opening angle of the gap between the suction strip and the inner wall.
- the disadvantage is that it can happen that a stable operating state occurs only slowly or not at all, or that if a threshold value cannot be reached without violating the second threshold value, no suitable countermeasures can be taken.
- the distance between the temperature sensors of the DE 102007027688 A1 the surface of the sealing strip facing the roll shell must be so high that it is still integrated in the material of the sealing strip until the maximum permissible wear is reached.
- the object of the present invention is an improved arrangement of the temperature sensors in the interior of the sealing strip. This results in a use for the optimized dewatering of web material.
- a sealing strip system according to claim 1 and a use according to claim 12 are proposed.
- the temperature sensors are integrated into the sealing strip, these temperature sensors being inserted or integrated into the sealing strip at different depths. It is particularly advantageous that the temperature sensors can also be used for wear monitoring or measurement. This happens because the temperature sensors break as soon as they are no longer protected by the material of the sealing strip and wear out on the suction roll.
- a plurality of such temperature sensors which are attached offset from one another in depth, are always combined in a sensor unit, with a plurality of such sensor units preferably being attached, distributed over the longitudinal direction of the sealing strip.
- a plurality of such sensor units preferably being attached, distributed over the longitudinal direction of the sealing strip.
- a device in which the sealing strip system according to the invention can be used consists of a suction roll, in the inside of which a suction box is attached, which is laterally limited by sealing strips.
- Each sealing strip is preferably assigned a lubricating water supply, which, viewed in the running direction, introduces lubricating fluid in front of the sealing strip in the direction of the inside of the perforated casing of the suction roll.
- Each sealing strip preferably has at least one actuator, by means of which the contact pressure of the sealing strip on the inner lateral surface of the suction roll can be changed.
- the second, rear sealing strip, seen in the running direction preferably additionally has a second actuator by means of which the opening angle of the gap between the sealing strip and the suction roll shell can be changed.
- the second, rear sealing strip seen in the running direction, has an electroacoustic transducer, which is preferably integrated into the holder of the sealing strip and is thus protected from moisture. Provision is preferably made for the data from the sensors to be processed in a miniserver and the actuators to be controlled by the miniserver.
- a miniserver is a miniaturized data processing system with input and output modules and options for digital communication, in particular for wireless communication with input and output devices and other data processing systems in a network.
- the temperature of the sealing strip is preferably measured for the optimized use of lubricating liquid and the use of lubricating water or the amount of lubricating water is controlled or regulated as a function of the measured temperature.
- the temperature can be measured at one or more points on the sealing strip and the amount of lubricating water introduced over the length of the sealing strip can be uniformly high in every area of the sealing strip.
- a local temperature profile can also be recorded in the sealing strip.
- the amount of lubricant introduced can advantageously be controlled or regulated separately in individual areas of the longitudinal course of the sealing strip, so that in the event of local heat generation in the sealing strip, lubricating water is only introduced in the affected area.
- the preferred regulation means that the contact pressure of the sealing strip is regulated to this minimum, which is necessary in order to maintain the vacuum at a specified / specifiable level.
- the minimum wear required for the respective vacuum or the minimum wear that can be achieved for the respective other operating parameters of the suction roll occurs, since the wear depends on the friction and thus on the contact pressure. If this minimum wear that can be achieved is too high for any reason such as unfavorable operating parameters, contamination or a malfunction, the friction is reduced through the use of lubricating water.
- An additional benefit of the lubricating water is that dirt such as paper fibers can be removed from the sealing strip.
- the spray tube is preferably integrated into the sealing strip holder.
- the lubricating water can be brought in very close to the friction surface, i.e. the surface with which the sealing strip rubs on the roller shell, and the space requirement can be reduced compared to a spray pipe mounted in front of the sealing strip holder.
- a flow sensor is preferably present in the spray pipe or in the line leading to the spray pipe, which is in data connection with the mini server in order to monitor the amount of spray water used in real time. The flow rate is regulated or controlled by the miniserver, for example by adjusting a valve.
- a preferred aspect relates to minimizing the noise level caused on the sealing strip.
- the sometimes very loud noise occurs when the jacket of the suction roll coming from the vacuum in the suction box, passes the second sealing strip and the vacuum in the openings in the roll jacket suddenly collapses.
- This sudden ventilation is counteracted according to the prior art in that the noise is reduced by gradually opening the gap between the sealing strip and the jacket of the suction roll.
- From the EP 1344865 B1 it is known to monitor the noise level and to take countermeasures if a threshold value is exceeded. It is preferable to measure the noise level and to regulate it to a minimum by adjusting the opening angle of the gap. The advantage of this is that the lowest possible noise level for the respective operating parameters is achieved in this way.
- a preferred adjustment mechanism for the opening angle of the gap is based on the EP 1348805 B1 Proposed to achieve the adjustment of the position of the rear end of the sealing strip not via a pressure hose, but by a motor, in particular a stepper motor or servo motor, which serves a bar, which has at least one inclined surface and is arranged below the sealing strip, in the longitudinal direction to move the sealing strip so that the height of the sealing strip can be adjusted along the inclined surface.
- a motor in particular a stepper motor or servo motor, which serves a bar, which has at least one inclined surface and is arranged below the sealing strip, in the longitudinal direction to move the sealing strip so that the height of the sealing strip can be adjusted along the inclined surface.
- the gap can be adjusted very precisely via the motor and there is no need for clamping elements and / or stops, as are required for a pressure hose design.
- This preferred adjustment mechanism is therefore simpler and more exact compared to the prior art, using the position information of the stepper motor, the position of the rear end of
- the preferred combined control method for all sub-areas includes measuring the temperature in the sealing strips, measuring the vacuum in the suction box, measuring the sound level after the second sealing strip, regulating the contact pressure of the sealing strips, regulating the amount of lubricating water and regulating the opening angle of the second sealing strip, with the contact pressure being the Sealing strips is regulated to the minimum value that is necessary to keep the vacuum in the suction box at a predefinable value, the amount of lubricating water per sealing strip is regulated depending on the temperature of the sealing strip and the opening angle of the second sealing strip is regulated in order to keep the sound level to a minimum .
- Fig. 1 the sealing strip according to the invention 1.1, 2.1 is shown with integrated temperature sensors 6.1.
- several sensor units 6 are integrated in the sealing strip 1.1, 2.1, each sensor unit 6 having four temperature sensors 6.1.
- the temperature sensors 6.1 With regard to the upper surface, that is to say the friction or friction surface of the sealing strip 1.1, 2.1, the temperature sensors 6.1 have different distances. The distance between two consecutive temperature sensors 6.1 is 2 mm, for example.
- the sensor units consist of a circuit board 6.4, temperature sensors 6.1, a microchip 6.2 with an integrated radio module and a power supply using a battery 6.3.
- a mini server with a radio module is positioned outside the suction roll and receives the data from the sensor units 6 via radio.
- the miniserver is preferably connected to a network and the data can be visualized via an output device such as a computer, tablet computer, laptop or mobile phone.
- the sealing strip 1.1, 2.1 has at least one sensor unit 6, preferably the sealing strip 1.1, 2.1 has several sensor units 6 in order to be able to measure the temperature at several points on the sealing strip 1.1, 2.1.
- a sealing strip system 1 according to the invention is shown, which is preferably used as the first sealing strip system 1 of a suction box 4, viewed in the direction of movement of the roller jacket 3.
- the sealing strip system 1 consists of a sealing strip 1.1 which is movably received in the groove of the sealing strip holder 1.2.
- an adjusting hose 1.3 designed as a pressure hose.
- the sealing strip holder 1.2 In front of the sealing strip 1.1, the sealing strip holder 1.2 is provided with a lubricating water system which has spray nozzles 1.4 via which the lubricating water is preferably conveyed through Spray tube 1.5 integrated into the sealing strip holder 1.2 is introduced.
- At least one sensor unit 6 is preferably integrated or inserted into the sealing strip 1.1. The contact pressure with which the sealing strip 1.1 is pressed against the inside of the roll shell 3 can be changed via the pressure in the contact hose 1.3.
- a sealing strip system 2 according to the invention is shown, which is preferably used as a second sealing strip system 2 of a suction box 4, viewed in the direction of movement of the suction roll.
- the sealing strip system 2 consists of a sealing strip 2.1 which has a web along the lower front edge which is movably received in the groove of the sealing strip holder 2.2.
- An adjusting hose 2.3 is located in the groove below the web of the sealing strip 2.1.
- the sealing strip holder 2.2 is provided with a lubricating water system which has spray nozzles 2.4 via which the lubricating water is introduced through a spray pipe 2.5 which is preferably integrated in the sealing strip holder 2.2.
- At least one sensor unit 6 is preferably integrated or inserted into the sealing strip 2.1.
- the contact pressure with which the sealing strip 2.1 is pressed in the front area against the inside of the roll shell 3 can be changed via the pressure in the contact hose 2.3.
- the sealing strip 2.1 has a curved upper surface so that the upper surface rests against the roll shell 3 in its front region and forms a gradually increasing gap with the roll shell 3 in the rear region.
- the width of this gap can be adjusted by a height-adjustable strip 2.7, which can move the rear end of the sealing strip 2.1 closer to the roll shell 3 or away from it.
- the height-adjustable strip 2.7 is guided along an upwardly sloping groove of a strip 2.6 which can be displaced in the longitudinal direction of the sealing strip 2.1.
- the displaceable strip 2.6 can be designed as a slide which is displaced in the groove of the sealing strip holder 2.2 by an adjusting spindle driven by the motor.
- One Longitudinal displacement of the displaceable bar 2.6 leads to the height-adjustable bar 2.7 being displaced upwards along the groove. It is also conceivable to make the bar 2.6 fixed and to adjust the height of the height-adjustable bar 2.7 along the groove by longitudinally displacing it. Since there are many possibilities to convert the rotational movement of a stepping motor into a linear movement of an actuator, it should be generally stated that the distance from the rear end of the sealing strip 2.1 to the roll shell 3 can be changed by a motor and can be kept in the respective position.
- a symbolically represented sound sensor 7 or a pickup is preferably attached, which is used to measure the noise level on or after the sealing strip 2.1.
- the preferred regulation method provides that the opening angle of the gap between the sealing strip 2.1 and the roll shell 3 is regulated in such a way that the noise level is reduced to a minimum.
- the sealing strip 1.1 and the front area of the sealing strip 2.1 are preferably also possible to provide an adjustment mechanism for adjusting the sealing strip 1.1 and the front area of the sealing strip 2.1, as is used in the rear area of the sealing strip 2.1. There is no need to use an adjusting hose. Since, in contrast to the rear area of the sealing strip 2.1, the front area and the Sealing strip 1.1 can be brought into contact with the roll shell 3, it is necessary to make the contact pressure controllable or regulatable.
- the contact pressure can be regulated by a controllable holding torque of the motor, or it can be regulated indirectly by a resilient element which is located between the actuating element and the sealing strip.
- the sealing strip is already in contact with the roll shell, a further adjustment of the actuator via the resilient element can exert an increasing force with increasing deformation of the resilient element, with which the sealing strip is pressed against the roll shell. It is advantageous that the actuator can also be positioned in such a way that there is a narrow gap between the sealing strip and the roll shell.
- FIG. 4 the structure of a suction box 4 with two sealing strip systems 1, 2 according to the invention is shown schematically.
- the direction of movement of the roll shell 3 is indicated by an arrow.
- the front first sealing strip system 1 as seen in the direction of movement is according to FIG Fig. 2 executed, the rear second sealing strip system 2 seen in the direction of movement is according to Fig. 3 executed.
- the two sealing strip systems 1, 2 can be seen to form the lateral delimitation of the suction box 4.
- a pressure sensor 5 for measuring the negative pressure or vacuum in the sealed area 4.1 is located inside the suction box 4.
- the negative pressure in the suction box 4 can also be determined in or by the vacuum pump, which is used to generate the vacuum in the sealed area 4.1.
- the first sealing strip system 1 has a temperature sensor system 16 for determining the temperature of the sealing strip 1.1, which is preferably implemented as a plurality of sensor units 6 according to FIG Fig. 1 is executed.
- the second sealing strip system 2 has a temperature sensor system 26 for determining the temperature of the sealing strip 2.1, which is preferably implemented as a plurality of sensor units 6 integrated into the sealing strip 2.1 according to FIG Fig. 1 is executed.
- the second sealing strip system 2 also has a sensor for recording noise, which is preferably designed as a sound sensor 7 integrated in the sealing strip holder 2.2.
- the first sealing strip system 1 has an adjustment mechanism for changing the position of the sealing strip 1.1, which preferably comprises an adjusting hose 1.3.
- the setting pressure of the sealing strip 1.1 and / or the distance between the sealing strip 1.1 and the roll shell 3 can be controlled and / or regulated via the adjustment mechanism.
- the first sealing strip system 1 has a lubricating water supply, the amount of lubricating water introduced being controllable and / or regulatable.
- the lubricating water supply is preferably designed as a spray tube 1.5 integrated in the sealing strip holder 1.2.
- the second sealing strip system 2 has an adjustment mechanism for changing the position of the front area of the sealing strip 2.1, which preferably comprises an adjusting hose 2.3.
- the adjustment pressure of the front area of the sealing strip 2.1 and / or the distance between the front area of the sealing strip 2.1 and the roll shell 3 can be controlled and / or regulated via the adjustment mechanism.
- the second sealing strip system 2 has a second adjustment mechanism for changing the position of the rear area of the sealing strip 2.1, which preferably comprises a stepper motor.
- the opening angle between the rear area of the sealing strip 2.1 and the roll shell 3 can be controlled and / or regulated via the second adjustment mechanism.
- the second sealing strip system 2 has a lubricating water supply, the amount of lubricating water introduced being controllable and / or regulatable.
- the lubricating water supply is preferably designed as a spray pipe 2.5 integrated in the sealing strip holder 2.2.
- the preferred control method consists in a first variant in the detection of the negative pressure or vacuum in the suction box 4, the contact pressure or the distance to the roll shell 3 of the first sealing strip 1.1 and the contact pressure or the distance to the roll shell 3 of the front area of the second sealing strip 2.1 are regulated in such a way that the minimum contact pressure or that maximum distance is set which is permissible to maintain the vacuum in the interior of the suction box 4 at the desired level.
- the contact pressure or the distance can be varied jointly for both sealing strips 1.1, 2.1, for example by applying the same pressure to the pressure hoses 1.3, 2.3.
- a temperature sensor system 16, 26 for detecting the sealing strip temperature of each sealing strip 1.1, 2.1 is preferably also present.
- the amount of lubricating water used for sealing strip 1.1 is controlled or regulated as a function of the measured values of the temperature sensor system 16 and the amount of lubricating water used for sealing strip 2.1 is controlled or regulated as a function of the measured values of the temperature sensor system 26.
- the regulation of the amount of lubricant as a function of the temperature of the sealing strip 1.1, 2.1 can also be used or advantageous without the aforementioned regulation of the contact pressure.
- the second variant of the preferred regulation also measures the noise level after or on the second sealing strip system 2 and, depending on the measured value, the distance between the rear area of the sealing strip 2.1 and the roll shell 3 and thus the opening angle of the gap between the sealing strip 2.1 and Roller shell 3 regulated, so that there is a minimum noise level.
- This method can also be used advantageously separately from the method described above, since the noise generation on conventional sealing strips can be up to 110 dBA and can therefore be hazardous to health.
- the constant noise optimization reduces this potential risk and also advantageously creates a working environment that is as quiet as possible and therefore pleasant.
- the opening angle of the gap can advantageously also be regulated or controlled in such a way that the frequency of the noise is changed, in particular towards lower frequencies. Since the possible disruptive effect of a noise is generally significantly increased by its tonality, which must be taken into account when forming an assessment level by adding a tonality bonus to the measurement result, the opening angle of the gap can advantageously also be regulated or controlled in such a way that the frequency of the noise is changed according to predetermined patterns or stochastically in order to reduce the tonality.
- the regulation or control of the noise emissions of all suction rolls is preferably carried out by a central data processing system, in particular a mini server, in order to prevent the noise emissions from two or more suction rolls from reaching a maximum in the same frequency range at the same time to have.
- the miniserver uses the measured values to determine the correcting variables required to control the actuators.
- the miniserver is preferably connected to a display and input device, in particular wirelessly, in order to display the operating parameters or to allow manual changes.
- the intelligent system for controlling all essential parameters within a suction roll which is centrally monitored, preferably by a mini server and can be changed either by the system or by the user depending on one another, is as energy-efficient and as possible ensures quiet operation and enables preventive maintenance.
- the system is based on components equipped with sensors such as sealing strip, pressure hose, sealing strip holder and spray tube, which preferably provide constant information about the process that cannot be viewed and / or controlled from the outside, preferably via radio / WLAN, and thus provide information about the operating status of the Suction roll.
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- Coating Apparatus (AREA)
- Package Closures (AREA)
- Sealing Devices (AREA)
- Advancing Webs (AREA)
Description
Die Erfindung betrifft Dichtleistensysteme für Saugwalzen.The invention relates to sealing strip systems for suction rolls.
Eine Saugwalze (suction roll), welche zur Entwässerung von Bahnmaterial beispielsweise bei Papiermaschinen eingesetzt wird, weist einen mit Öffnungen versehenen Walzenmantel und im Inneren zumindest einen Saugkasten auf. Der Saugkasten ist ortsfest im Inneren der Saugwalze montiert, wobei der mit Löchern versehene Walzenmantel um den Saugkasten rotiert. Um den Saugkasten gegenüber dem Walzenmantel abzudichten, weist dieser seitlich Dichtleisten auf, die das Innere des Saugkastens gegenüber dem restlichen Volumen der Saugwalze abdichten und zwar in Längsrichtung der Saugwalze. In Umfangsrichtung der Saugwalze wird der Saugkasten an seinen beiden Enden durch Formatbegrenzer begrenzt und gegenüber dem Walzenmantel abgedichtet.A suction roll, which is used for dewatering web material, for example in paper machines, has a roll shell provided with openings and at least one suction box inside. The suction box is fixedly mounted inside the suction roll, with the roll shell provided with holes rotating around the suction box. In order to seal the suction box against the roll shell, it has sealing strips on the side, which seal the interior of the suction box against the remaining volume of the suction roll, specifically in the longitudinal direction of the suction roll. In the circumferential direction of the suction roll, the suction box is delimited at both ends by size limiters and sealed off from the roll shell.
Besondere Herausforderungen bei der Konstruktion bzw. beim Betrieb von Saugwalzen bestehen im Verschleiß der Dichtleisten und in der Lärmentwicklung anschließend an die Dichtleisten.Particular challenges in the construction and operation of suction rolls are the wear and tear of the sealing strips and the generation of noise after the sealing strips.
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Aufgabe der gegenständlichen Erfindung ist eine verbesserte Anordnung der Temperatursensoren im Inneren der Dichtleiste. Daraus ergibt sich eine Verwendung zur optimierten Entwässerung von Bahnmaterial. Zur Lösung der Aufgabe wird ein Dichtleistensystem gemäß Anspruch 1 sowie eine Verwendung gemäß Anspruch 12 vorgeschlagen.The object of the present invention is an improved arrangement of the temperature sensors in the interior of the sealing strip. This results in a use for the optimized dewatering of web material. To achieve the object, a sealing strip system according to
Als erfindungsgemäße Verbesserung wird also vorgeschlagen, mehrere Temperatursensoren in die Dichtleiste zu integrieren, wobei diese Temperatursensoren in unterschiedlicher Tiefe in die Dichtleiste eingesetzt bzw. integriert sind. Besonders vorteilhaft ist dabei, dass die Temperatursensoren auch zur Verschleißüberwachung bzw. Messung eingesetzt werden können. Dies erfolgt dadurch, dass die Temperatursensoren kaputt gehen, sobald diese nicht mehr vom Material der Dichtleiste geschützt sind und an der Saugwalze verschleißen.As an improvement according to the invention, it is proposed to integrate several temperature sensors into the sealing strip, these temperature sensors being inserted or integrated into the sealing strip at different depths. It is particularly advantageous that the temperature sensors can also be used for wear monitoring or measurement. This happens because the temperature sensors break as soon as they are no longer protected by the material of the sealing strip and wear out on the suction roll.
Bevorzugt sind immer mehrere solcher in der Tiefe zueinander versetzt angebrachte Temperatursensoren in einer Sensoreinheit zusammengefasst, wobei bevorzugt über die Längsrichtung der Dichtleiste verteilt mehrere solche Sensoreinheiten angebracht sind. Dadurch kann der örtliche Temperaturverlauf in der Dichtleiste und der örtliche Verschleiß in der Dichtleiste überwacht werden, bzw. diese Daten an eine Steuerung oder Regelung übertragen werden.Preferably, a plurality of such temperature sensors, which are attached offset from one another in depth, are always combined in a sensor unit, with a plurality of such sensor units preferably being attached, distributed over the longitudinal direction of the sealing strip. As a result, the local temperature profile in the sealing strip and the local wear in the sealing strip can be monitored, or these data can be transmitted to a control or regulation.
Eine Vorrichtung, in welcher das erfindungsgemäße Dichtleistensystem verwendet werden kann, besteht aus einer Saugwalze, in deren Inneren ein Saugkasten angebracht ist, welcher seitlich durch Dichtleisten begrenzt ist. Jeder Dichtleiste ist bevorzugt eine Schmierwasserzuführung zugeordnet, welchen in Laufrichtung gesehen vor der Dichtleiste Schmierflüssigkeit in Richtung der Innenseite des löchrigen Mantels der Saugwalze einbringen. Jede Dichtleiste weist bevorzugt zumindest einen Aktuator auf, über den der Anstelldruck der Dichtleiste an die innere Mantelfläche der Saugwalze veränderbar ist. Die in Laufrichtung gesehen zweite, hintere Dichtleiste weist bevorzugt zusätzlich einen zweiten Aktuator auf über welchen der Öffnungswinkel des Spaltes zwischen Dichtleiste und Saugwalzenmantel veränderbar ist. Die in Laufrichtung gesehen zweite, hintere Dichtleiste weist einen elektroakustischen Wandler auf, welcher bevorzugt in den Halter der Dichtleiste integriert und somit vor Feuchtigkeit geschützt ist. Bevorzugt ist vorgesehen die Daten der Sensoren in einem Miniserver zu verarbeiten und die Aktuatoren durch den Miniserver anzusteuern. Ein Miniserver ist eine miniaturisierte Datenverarbeitungsanlage mit Ein- und Ausgangsmodulen und Möglichkeiten zur digitalen Kommunikation insbesondere zur drahtlosen Kommunikation mit Ein- und Ausgabegeräten und anderen Datenverarbeitungsanlagen eines Netzwerks.A device in which the sealing strip system according to the invention can be used consists of a suction roll, in the inside of which a suction box is attached, which is laterally limited by sealing strips. Each sealing strip is preferably assigned a lubricating water supply, which, viewed in the running direction, introduces lubricating fluid in front of the sealing strip in the direction of the inside of the perforated casing of the suction roll. Each sealing strip preferably has at least one actuator, by means of which the contact pressure of the sealing strip on the inner lateral surface of the suction roll can be changed. The second, rear sealing strip, seen in the running direction, preferably additionally has a second actuator by means of which the opening angle of the gap between the sealing strip and the suction roll shell can be changed. The second, rear sealing strip, seen in the running direction, has an electroacoustic transducer, which is preferably integrated into the holder of the sealing strip and is thus protected from moisture. Provision is preferably made for the data from the sensors to be processed in a miniserver and the actuators to be controlled by the miniserver. A miniserver is a miniaturized data processing system with input and output modules and options for digital communication, in particular for wireless communication with input and output devices and other data processing systems in a network.
Bevorzugt wird die Temperatur der Dichtleiste zum optimierten Einsatz von Schmierflüssigkeit gemessen und der Schmierwassereinsatz bzw. die Schmierwassermenge in Abhängigkeit der gemessenen Temperatur gesteuert bzw. geregelt. Dazu kann die Temperatur an einem oder mehreren Punkten der Dichtleiste gemessen werden und die über die Länge der Dichtleiste eingebrachte Schmierwassermenge in jedem Bereich der Dichtleiste einheitlich hoch sein.The temperature of the sealing strip is preferably measured for the optimized use of lubricating liquid and the use of lubricating water or the amount of lubricating water is controlled or regulated as a function of the measured temperature. For this purpose, the temperature can be measured at one or more points on the sealing strip and the amount of lubricating water introduced over the length of the sealing strip can be uniformly high in every area of the sealing strip.
Wird die Temperatur der Dichtleiste in mehreren Bereichen der Dichtleiste gemessen, kann auch ein örtlicher Temperaturverlauf in der Dichtleiste erfasst werden. Vorteilhaft kann die eingebrachte Schmiermittelmenge an einzelnen Bereichen des Längsverlaufs der Dichtleiste getrennt gesteuert bzw. geregelt werden, sodass im Fall einer lokalen Hitzeentstehung in der Dichtleiste nur im betroffenen Bereich Schmierwasser eingebracht wird.If the temperature of the sealing strip is measured in several areas of the sealing strip, a local temperature profile can also be recorded in the sealing strip. The amount of lubricant introduced can advantageously be controlled or regulated separately in individual areas of the longitudinal course of the sealing strip, so that in the event of local heat generation in the sealing strip, lubricating water is only introduced in the affected area.
Da die Wärme in der Dichtleiste durch Reibung an der inneren Mantelfläche der Saugwalze entsteht und das Schmierwasser diese Reibung herabsetzt, kann so exakt die benötige Schmierwassermenge eingebracht werden, welche nötig ist um die Reibung und somit den Verschleiß gering zu halten.Since the heat in the sealing strip is created by friction on the inner surface of the suction roll and the lubricating water reduces this friction, the exact amount of lubricating water required can be introduced, which is necessary to keep the friction and thus the wear low.
Für das soeben beschriebene Verfahren ist es nötig, die Temperatur der Dichtleiste zu erfassen, möglichst nahe an der Oberfläche, mit welcher die Dichtleiste an der inneren Mantelfläche der Saugwalze reibt.For the method just described, it is necessary to detect the temperature of the sealing strip, as close as possible to the surface with which the sealing strip rubs against the inner surface of the suction roll.
Aus dem Stand der Technik ist es bekannt, die Position bzw. den Anstelldruck der Dichtleiste in Abhängigkeit der Dichtleistentemperatur und des Druckes im Inneren des Saugkastens zu regeln.It is known from the prior art to regulate the position or the contact pressure of the sealing strip as a function of the sealing strip temperature and the pressure inside the suction box.
Bevorzugt wird vorgeschlagen, die Position bzw. den Anstelldruck der Dichtleiste nur in Abhängigkeit des Drucks im Inneren des Saugkastens zu regeln. Wobei über die Erfassung der Temperatur der Einsatz von Schmiermittel geregelt werden kann. Vorteilhaft daran ist, dass der Aktuator zum Verändern des Anstelldrucks der Dichtleiste einfacher ausgeführt werden kann, da die durch den Aktuator ausgeübte Kraft über die Leistenlänge konstant sein kann und die Notwendigkeit entfällt, durch den Aktuator eine negative Kraft, welche eine Verminderung des Anstelldrucks zur Folge hat, auf die Dichtleiste auszuüben. Zudem wird keine Klemmvorrichtung zum Fixieren der Dichtleiste benötigt, welche in anderen nach dem Stand der Technik bekannten Saugwalzen zum Einsatz kommt, um die Dichtleiste in einem definierten Abstand zum Walzenmantel fest zu legen. Zudem ist die Gefahr von nicht zulässigen Betriebszuständen gemindert, da eine erhöhte Temperatur bzw. Reibung durch den Einsatz von Schmierwasser behoben wird und nicht durch Veränderung des Anstelldrucks, was zu einer Minderung des Vakuums führt. Beim bekannten Verfahren nach dem Stand der Technik ist es hingegen nötig einen gewisse "Anstelldruck-Reserve" einzuhalten, da es ansonsten nicht möglich wäre, einen Temperaturanstieg zu kompensieren, ohne dass das Vakuum geschwächt wird.It is preferably proposed to regulate the position or the contact pressure of the sealing strip only as a function of the pressure inside the suction box. The use of lubricants can be regulated by recording the temperature. The advantage of this is that the actuator for changing the contact pressure of the sealing strip can be made simpler, since the force exerted by the actuator can be constant over the length of the strip and there is no need to apply a negative force through the actuator, which results in a reduction in the contact pressure has to exert on the sealing strip. In addition, no clamping device is required to fix the sealing strip, which is used in other suction rolls known from the prior art in order to fix the sealing strip at a defined distance from the roll shell. In addition, the risk of non-permissible operating conditions is reduced, since an increased temperature or friction is eliminated by using lubricating water and not by changing the contact pressure, which leads to a reduction in the vacuum. In the known method according to the prior art, however, it is necessary to maintain a certain "contact pressure reserve", since otherwise it would not be possible to compensate for a temperature increase without the vacuum being weakened.
Durch die bevorzugte Regelung wird der Anstelldruck der Dichtleiste eben auf dieses Minimum geregelt, welches nötig ist, um das Vakuum in vorgegebener/vorgebbarer Stärke aufrecht zu halten. In diesem Betriebszustand stellt sich der für das jeweilige Vakuum benötigte, bzw. der für die jeweiligen sonstigen Betriebsparameter der Saugwalze erreichbare, minimale Verschleiß ein, da der Verschleiß von der Reibung und somit vom Anstelldruck abhängig ist. Ist dieser minimal erreichbare Verschleiß aus irgendwelchen Gründen wie ungünstigen Betriebsparametern, Verschmutzung oder eine Störung zu hoch, wird die Reibung durch den Einsatz von Schmierwasser herabgesetzt. Ein Zusatznutzen des Schmierwassers ist, dass Verschmutzung wie beispielsweise Papierfasern von der Dichtleiste entfernt werden können.The preferred regulation means that the contact pressure of the sealing strip is regulated to this minimum, which is necessary in order to maintain the vacuum at a specified / specifiable level. In this operating state, the minimum wear required for the respective vacuum or the minimum wear that can be achieved for the respective other operating parameters of the suction roll occurs, since the wear depends on the friction and thus on the contact pressure. If this minimum wear that can be achieved is too high for any reason such as unfavorable operating parameters, contamination or a malfunction, the friction is reduced through the use of lubricating water. An additional benefit of the lubricating water is that dirt such as paper fibers can be removed from the sealing strip.
Bevorzugt ist vorgesehen als Verbesserung gegenüber dem Stand der Technik das Spritzrohr in den Dichtleistenhalter zu integrieren. Dadurch kann das Schmierwasser sehr nahe an der Friktionsfläche, also jener Fläche mit der die Dichtleiste am Walzenmantel reibt, eingebracht und der Platzbedarf gegenüber einem vor dem Dichtleistenhalter montierten Spritzrohr reduziert werden. Gegenüber einem Schmierwassersystem, welches in die Dichtleiste integriert ist, ergeben sich die Vorteile, dass die Friktionsfläche nicht durch die Öffnungen der Schmierwasserzuführung reduziert ist und dass die Dichtleiste einen einfacheren Aufbau aufweist. Bevorzugt ist im Spritzrohr oder in der zum Spritzrohr führenden Leitung ein Durchflusssensor vorhanden, welcher in Datenverbindung mit dem Miniserver ist, um die Menge an eingesetztem Spritzwasser in Echtzeit zu überwachen. Die Durchflussmenge wird vom Miniserver beispielsweise durch Verstellung eines Ventils geregelt oder gesteuert.As an improvement over the prior art, the spray tube is preferably integrated into the sealing strip holder. As a result, the lubricating water can be brought in very close to the friction surface, i.e. the surface with which the sealing strip rubs on the roller shell, and the space requirement can be reduced compared to a spray pipe mounted in front of the sealing strip holder. Compared to a lubricating water system which is integrated into the sealing strip, there are the advantages that the friction surface is not reduced by the openings in the lubricating water supply and that the sealing strip has a simpler structure. A flow sensor is preferably present in the spray pipe or in the line leading to the spray pipe, which is in data connection with the mini server in order to monitor the amount of spray water used in real time. The flow rate is regulated or controlled by the miniserver, for example by adjusting a valve.
Besonders vorteilhaft ist, wenn das soeben beschriebene Verfahren mithilfe einer Dichtleiste mit den zuvor beschriebenen Temperatursensoren mit Verschleißerkennung umgesetzt wird, da die Temperatur immer sehr nahe an der Oberfläche, an welcher die Reibung auftritt, gemessen wird und so sehr rasch bereits auf geringste Temperaturanstiege regiert werden kann. Zudem kann, sofern individuell ansteuerbare Schmierwasserdüsen eingesetzt werden, oder mehrere einzeln ansteuerbare Spritzrohre pro Dichtleistensystem verwendet werden, das Schmierwasser nur in jenem Bereich eingebracht werden, in welchem ein lokaler Temperaturanstieg gemessen wird.It is particularly advantageous if the method just described is implemented with the aid of a sealing strip with the temperature sensors described above with wear detection, since the temperature is always measured very close to the surface on which the friction occurs and can thus be responded to very quickly even to the slightest temperature rises can. In addition, If individually controllable lubricating water nozzles are used, or several individually controllable spray pipes are used per sealing strip system, the lubricating water is only introduced into the area in which a local temperature rise is measured.
Ein bevorzugter Teilaspekt betrifft die Minimierung des an der Dichtleiste verursachten Geräuschpegels. Das mitunter sehr laute Geräusch entsteht, wenn der Mantel der Saugwalze vom Vakuum des Saugkastens kommend, die zweite Dichtleiste passiert und das Vakuum in den Öffnungen des Walzenmantels schlagartig zusammenbricht. Dieser schlagartigen Belüftung wird nach dem Stand der Technik dadurch entgegen gewirkt, dass durch eine allmähliche Öffnung des Spaltes zwischen Dichtleiste und Mantel der Saugwalze das Geräusch reduziert wird. Aus der
Zur Ausbildung eines bevorzugten gegenüber dem Stand der Technik verbesserten Verstellmechanismus für den Öffnungswinkel des Spalts, wird ausgehend von der
Das bevorzugte kombinierte Regelungsverfahren aller Teilbereiche umfasst die Messung der Temperatur in den Dichtleisten, Messung des Vakuums im Saugkasten, Messung des Schallpegels nach der zweiten Dichtleiste, Regelung des Anstelldrucks der Dichtleisten, Regelung der Schmierwassermenge und Regelung des Öffnungswinkels der zweiten Dichtleiste, wobei der Anstelldruck der Dichtleisten auf jenen minimalen Wert geregelt wird, welcher nötig ist um das Vakuum im Saugkasten auf einem vorgebbaren Wert zu halten, die Schmierwassermenge je Dichtleiste in Abhängigkeit der Temperatur der Dichtleiste geregelt wird und der Öffnungswinkel der zweiten Dichtleiste geregelt wird, um den Schallpegel minimal zu halten.The preferred combined control method for all sub-areas includes measuring the temperature in the sealing strips, measuring the vacuum in the suction box, measuring the sound level after the second sealing strip, regulating the contact pressure of the sealing strips, regulating the amount of lubricating water and regulating the opening angle of the second sealing strip, with the contact pressure being the Sealing strips is regulated to the minimum value that is necessary to keep the vacuum in the suction box at a predefinable value, the amount of lubricating water per sealing strip is regulated depending on the temperature of the sealing strip and the opening angle of the second sealing strip is regulated in order to keep the sound level to a minimum .
Die Erfindung wird an Hand von Zeichnungen veranschaulicht:
- Fig. 1:
- Zeigt den Aufbau einer erfindungsgemäßen Dichtleiste mit erfindungsgemäßen Temperatursensoren mit Verschleißerkennung.
- Fig. 2:
- zeigt schematisch ein beispielhaftes erfindungsgemäßes Dichtleistensystem.
- Fig. 3:
- zeigt schematisch ein beispielhaftes erfindungsgemäßes Dichtleistensystem in geräuschminimierender Ausführung.
- Fig. 4:
- Zeigt schematisch eine besonders bevorzugte erfindungsgemäße Dichtvorrichtung einer Saugwalze.
- Fig. 1:
- Shows the structure of a sealing strip according to the invention with temperature sensors according to the invention with wear detection.
- Fig. 2:
- shows schematically an exemplary sealing strip system according to the invention.
- Fig. 3:
- shows schematically an exemplary sealing strip system according to the invention in a noise-minimizing design.
- Fig. 4:
- Shows schematically a particularly preferred sealing device according to the invention of a suction roll.
In
Außerhalb der Saugwalze ist ein Miniserver mit Funkmodul positioniert, der die Daten von den Sensoreinheiten 6 über Funk empfängt. Der Miniserver ist vorzugsweise mit einem Netzwerk verbunden und die Daten können über ein Ausgabegerät wie beispielsweise Computer, Tabletcomputer, Laptop oder Mobiltelefon visualisiert werden.A mini server with a radio module is positioned outside the suction roll and receives the data from the
Die Dichtleiste 1.1, 2.1 weist zumindest eine Sensoreinheit 6 auf, vorzugsweise weist die Dichtleiste 1.1, 2.1 mehrere Sensoreinheiten 6 auf, um die Temperatur an mehreren Punkten der Dichtleiste 1.1, 2.1 messen zu können.The sealing strip 1.1, 2.1 has at least one
In
In
Im Dichtleistenhalter 2.2 ist bevorzugt ein symbolisch dargestellter Schallsensor 7 bzw. ein Tonabnehmer angebracht, welcher zur Messung des Geräuschpegels an bzw. nach der Dichtleiste 2.1 dient. Das bevorzugte Regelungsverfahren sieht vor, dass der Öffnungswinkel des Spalts zwischen Dichtleiste 2.1 und Walzenmantel 3 derart geregelt wird, dass der Geräuschpegel auf ein Minimum reduziert wird.In the sealing strip holder 2.2, a symbolically represented
Als Verallgemeinerung kann festgehalten werden, dass anstelle der Druckschläuche 1.3, 2.3 auch andere nach dem Stand der Technik bekannte Verstellvorrichtungen an der Dichtleiste 1.1 und dem vorderen Bereich der Dichtleiste 2.1 eingesetzt werden können. So können beispielsweise zusätzlich zu den Druckschläuchen Klemmvorrichtungen vorhanden sein, um die Dichtleiste temporär oder nach Erreichen eines stabilen, optimalen Betriebszustands in ihrer Position zu fixieren. Außerdem kann wie aus der
Bevorzugt ist es auch möglich, zur Verstellung der Dichtleiste 1.1 und des vorderen Bereichs der Dichtleiste 2.1 einen Verstellmechanismus vorzusehen, wie er am hinteren Bereich der Dichtleiste 2.1 eingesetzt ist. Dabei kann auf den Einsatz eines Anstellschlauches verzichtet werden. Da im Gegensatz zum hinteren Bereich der Dichtleiste 2.1, deren vorderer Bereich und die Dichtleiste 1.1 mit dem Walzenmantel 3 in Kontakt bringbar sind, ist es erforderlich den Anstelldruck steuer- oder regelbar zu gestalten. Der Anstelldruck kann dabei durch ein regelbares Haltemoment des Motors geregelt werden, oder indirekt durch ein federelastisches Element regelbar sein, welches sich zwischen dem Stellelement und der Dichtleiste befindet. Ist die Dichtleiste bereits in Kontakt mit dem Walzenmantel kann über eine weitere Verstellung des Stellgliedes über das federelastische Element eine mit zunehmender Verformung des federelastischen Elements zunehmende Kraft ausgeübt werden, mit welcher die Dichtleiste gegen den Walzenmantel gepresst wird. Vorteilhaft ist, dass das Stellglied auch so positioniert werden kann, dass sich ein schmaler Spalt zwischen Dichtleiste und Walzenmantel ergibt.It is preferably also possible to provide an adjustment mechanism for adjusting the sealing strip 1.1 and the front area of the sealing strip 2.1, as is used in the rear area of the sealing strip 2.1. There is no need to use an adjusting hose. Since, in contrast to the rear area of the sealing strip 2.1, the front area and the Sealing strip 1.1 can be brought into contact with the
In
Wie symbolisch dargestellt befindet sich im Inneren des Saugkastens 4 ein Drucksensor 5 zur Messung des Unterdrucks bzw. Vakuums im abgedichteten Bereich 4.1. Alternativ kann die Ermittlung des Unterdrucks im Saugkasten 4 auch in der bzw. durch die Vakuumpumpe erfolgen, welche zur Erzeugung des Vakuums im abgedichteten Bereich 4.1 dient.As shown symbolically, a
Das erste Dichtleistensystem 1 weist eine Temperatursensorik 16 zur Ermittlung der Temperatur der Dichtleiste 1.1 auf, welche bevorzugt als mehrere in die Dichtleiste 1.1 integrierte Sensoreinheiten 6 gemäß
Das zweite Dichtleistensystem 2 weist eine Temperatursensorik 26 zur Ermittlung der Temperatur der Dichtleiste 2.1 auf, welche bevorzugt als mehrere in die Dichtleiste 2.1 integrierte Sensoreinheiten 6 gemäß
Das erste Dichtleistensystem 1 weist einen Verstellmechanismus zur Positionsänderung der Dichtleiste 1.1 auf, welcher bevorzugt einen Anstellschlauch 1.3 umfasst. Über den Verstellmechanismus ist der Anstelldruck der Dichtleiste 1.1 und/oder die Distanz zwischen Dichtleiste 1.1 und Walzenmantel 3 steuerbar und/oder regelbar. Das erste Dichtleistensystem 1 weist eine Schmierwasserzuführung auf, wobei die Menge an eingebrachtem Schmierwasser steuerbar und oder regelbar ist. Die Schmierwasserzuführung ist vorzugsweise als ein in den Dichtleistenhalter 1.2 integriertes Spritzrohr 1.5 ausgeführt.The first
Das zweite Dichtleistensystem 2 weist einen Verstellmechanismus zur Positionsänderung des vorderen Bereichs der Dichtleiste 2.1 auf, welcher bevorzugt einen Anstellschlauch 2.3 umfasst. Über den Verstellmechanismus sind der Anstelldruck des vorderen Bereichs der Dichtleiste 2.1 und/oder die Distanz zwischen dem vorderen Bereich der Dichtleiste 2.1 und Walzenmantel 3 steuerbar und/oder regelbar. Das zweite Dichtleistensystem 2 weist einen zweiten Verstellmechanismus zur Positionsänderung des hinteren Bereichs der Dichtleiste 2.1 auf, welcher bevorzugt einen Schrittmotor umfasst. Über den zweiten Verstellmechanismus ist der Öffnungswinkel zwischen dem hinteren Bereich der Dichtleiste 2.1 und dem Walzenmantel 3 steuerbar und/oder regelbar.The second
Das zweite Dichtleistensystem 2 weist eine Schmierwasserzuführung auf, wobei die Menge an eingebrachtem Schmierwasser steuerbar und oder regelbar ist. Die Schmierwasserzuführung ist vorzugsweise als ein in den Dichtleistenhalter 2.2 integriertes Spritzrohr 2.5 ausgeführt.The second
Das bevorzugte Regelungsverfahren besteht in einer ersten Variante in der Erfassung des Unterdrucks bzw. Vakuums im Saugkasten 4, wobei der Anstelldruck bzw. der Abstand zum Walzenmantel 3 der ersten Dichtleiste 1.1 und der Anstelldruck bzw. der Abstand zum Walzenmantel 3 des vorderen Bereichs der zweiten Dichtleiste 2.1 so geregelt werden, dass sich jener minimale Anstelldruck bzw. jener maximale Abstand einstellt, welcher zulässig ist, um das Vakuum in gewünschter Stärke im Inneren des Saugkastens 4 aufrecht zu halten. Der Anstelldruck bzw. der Abstand kann dabei für beide Dichtleisten 1.1, 2.1 gemeinsam variiert werden, beispielsweise indem die Druckschläuche 1.3, 2.3 mit demselben Druck beaufschlagt werden.The preferred control method consists in a first variant in the detection of the negative pressure or vacuum in the
Besonders vorteilhaft an diesem bevorzugten Regelungsverfahren ist, dass der Energiebedarf der Walze minimiert wird, da mit einem minimalen Anstelldruck das Vakuum aufrecht gehalten wird, woraus sich eine hohe Einsparung ergibt.What is particularly advantageous about this preferred control method is that the energy requirement of the roller is minimized, since the vacuum is maintained with a minimal contact pressure, which results in high savings.
Es ist auch denkbar, den Anstelldruck bzw. der Abstand gegebenenfalls unter Anwendung festlegbarer zusätzlicher SteuerVorschriften für beide Dichtleisten 1.1, 2.1 getrennt zu regeln, beispielsweise indem die stärker verschlissenen Leiste weniger stark angepresst wird als die noch weniger verschlissene Leiste.It is also conceivable to regulate the contact pressure or the distance separately for both sealing strips 1.1, 2.1, if necessary using definable additional control rules, for example by pressing the more heavily worn strip less than the even less worn strip.
Vorzugsweise ist bei der ersten Variante des Regelungsverfahren zudem eine Temperatursensorik 16, 26 zur Erfassung der Dichtleistentemperatur jeder Dichtleiste 1.1, 2.1 vorhanden. Die Menge an eingesetztem Schmierwasser für Dichtleiste 1.1 wird dabei in Abhängigkeit der Messwerte der Temperatursensorik 16 gesteuert bzw. geregelt und die Menge an eingesetztem Schmierwasser für Dichtleiste 2.1 wird dabei in Abhängigkeit der Messwerte der Temperatursensorik 26 gesteuert bzw. geregelt. Die Regelung der Schmiermittelmenge in Abhängigkeit der Temperatur der Dichtleiste 1.1, 2.1 ist auch ohne die zuvor genannte Regelung des Anstelldrucks einsetzbar bzw. vorteilhaft.In the first variant of the control method, a
Besonders vorteilhaft an diesem bevorzugten Steuerungs- bzw. Regelungsverfahren ist, dass der Wasserbedarf minimiert wird und somit deutlich weniger Wasser verbraucht wird als mit konventionellen Spritzrohren.What is particularly advantageous about this preferred control or regulation method is that the water requirement is minimized and This means that significantly less water is used than with conventional spray pipes.
In Erweiterung der ersten Variante wird in der zweiten Variante der bevorzugten Regelung zudem der Geräuschpegel nach bzw. am zweiten Dichtleistensystem 2 gemessen und in Abhängigkeit des Messwerts der Abstand des hinteren Bereichs der Dichtleiste 2.1 zum Walzenmantel 3 und damit der Öffnungswinkel des Spalts zwischen Dichtleiste 2.1 und Walzenmantel 3 geregelt, sodass sich ein minimaler Geräuschpegel ergibt. Dieses Verfahren ist auch getrennt von den zuvor beschriebenen Verfahren vorteilhaft anwendbar, da die Lärmentwicklung an konventionellen Dichtleisten bis zu 110 dBA betragen und somit gesundheitsgefährdend sein kann. Durch die konstante Geräuschoptimierung wird dieses Gefahrenpotential reduziert und zudem vorteilhaft eine möglichst leise und somit angenehme Arbeitsumgebung geschaffen.As an extension of the first variant, the second variant of the preferred regulation also measures the noise level after or on the second
Vorteilhaft kann der Öffnungswinkel des Spaltes auch so geregelt bzw. gesteuert werden, dass die Frequenz des Geräusches verändert wird, insbesondere hin zu tieferen Frequenzen. Da sich die mögliche Störwirkung eines Geräusches im Allgemeinen durch dessen Tonhaltigkeit erheblich erhöht, was bei der Bildung eines Beurteilungspegels durch einen auf das Messergebnis aufzuschlagenden Tonhaltigkeitszuschlag zu berücksichtigen ist, kann der Öffnungswinkel des Spaltes vorteilhaft auch so geregelt, bzw. gesteuert sein, dass die Frequenz des Geräusches nach vorgegebenen Mustern oder stochastisch verändert wird um die Tonhaltigkeit zu reduzieren.The opening angle of the gap can advantageously also be regulated or controlled in such a way that the frequency of the noise is changed, in particular towards lower frequencies. Since the possible disruptive effect of a noise is generally significantly increased by its tonality, which must be taken into account when forming an assessment level by adding a tonality bonus to the measurement result, the opening angle of the gap can advantageously also be regulated or controlled in such a way that the frequency of the noise is changed according to predetermined patterns or stochastically in order to reduce the tonality.
Da eine Papiermaschine in der Regel eine Vielzahl von Saugwalzen aufweist, erfolgt die Regelung bzw. Steuerung der Geräuschemissionen aller Saugwalzen vorzugsweise durch eine zentrale Datenverarbeitungsanlage wie insbesondere einem Miniserver, um zu verhindern, dass die Geräuschemissionen von zwei oder mehr Saugwalzen zeitgleich ein Maximum im selben Frequenzbereich haben. Bevorzugt ist vorgesehen alle Messwerte aller Sensoren an einen Miniserver zu übermitteln, bevorzugt drahtlos, in welchem die Regel- und Steuervorschriften abgespeichert sind, die gegebenenfalls durch ein Programm oder einen Benutzer abgeändert werden können. Der Miniserver ermittelt aus den Messwerten die benötigten Stellgrößen zur Ansteuerung der Aktuatoren. Bevorzugt ist der Miniserver mit einem Anzeige- und Eingabegerät verbunden, insbesondere drahtlos, um die Betriebsparameter anzuzeigen, bzw. um manuelle Änderungen zu erlauben.Since a paper machine usually has a large number of suction rolls, the regulation or control of the noise emissions of all suction rolls is preferably carried out by a central data processing system, in particular a mini server, in order to prevent the noise emissions from two or more suction rolls from reaching a maximum in the same frequency range at the same time to have. Provision is preferably made for all measured values of all sensors to be transmitted to a mini server, preferably wirelessly, in which the Rules and regulations are stored, which can optionally be changed by a program or a user. The miniserver uses the measured values to determine the correcting variables required to control the actuators. The miniserver is preferably connected to a display and input device, in particular wirelessly, in order to display the operating parameters or to allow manual changes.
Besonders vorteilhaft an der besonders bevorzugten Ausführungsvariante der gegenständlichen Erfindung ist, dass das intelligente System zur Steuerung aller wesentlichen Parameter innerhalb einer Saugwalze, welche zentral vorzugsweise durch einen Miniserver überwacht und entweder vom System oder vom Benutzer in Abhängigkeit zueinander verändert werden können, einen möglichst energieeffizienten und geräuscharmen Betrieb gewährleistet und eine vorbeugende Instandhaltung ermöglicht. Das System basiert auf mit Sensoren ausgestatteten Bauteilen wie insbesondere Dichtleiste, Druckschlauch, Dichtleistenhalter und Spritzrohr, welche vorzugsweise über Funk/WLAN konstant Informationen über den von außen nicht einseh- und/oder kontrollierbaren Prozess geben und liefern somit in einmaliger Form Informationen über den Betriebszustand der Saugwalze.What is particularly advantageous about the particularly preferred embodiment of the present invention is that the intelligent system for controlling all essential parameters within a suction roll, which is centrally monitored, preferably by a mini server and can be changed either by the system or by the user depending on one another, is as energy-efficient and as possible ensures quiet operation and enables preventive maintenance. The system is based on components equipped with sensors such as sealing strip, pressure hose, sealing strip holder and spray tube, which preferably provide constant information about the process that cannot be viewed and / or controlled from the outside, preferably via radio / WLAN, and thus provide information about the operating status of the Suction roll.
Claims (15)
- A sealing ledge system for use as intended in a suction roll for dewatering sheet material, wherein the sealing ledge system (1, 2) is used to laterally seal at least one suction box (4) on the inside of the suction roll and comprises at least one sealing ledge (1.1, 2.1), wherein the sealing ledge (1.1, 2.1) is designed to seal off the suction box (4) from the roll shell (3) of the suction roll and the sealing ledge (1.1, 2.1) has a surface which faces the inner side of the roll shell (3) when the sealing ledge system (1, 2) is used in the suction roll, wherein at least two temperature sensors (6.1) are included or inserted in at least one sealing ledge (1.1, 2.1),characterised in thatat least one temperature sensor (6.1) has a larger distance than the other(s) from that surface of the sealing ledge (1.1, 2.1) which faces the inside of the roll shell (3) when used as intended.
- The sealing ledge system of claim 1, characterised in that at least one sensor unit (6) is included or inserted in at least one sealing ledge (1.1, 2.1), wherein said sensor unit (6) comprises a circuit board (6.4) having at least two, preferably at least four, temperature sensors (6.1), wherein each temperature sensor (6.1) has a distance from that surface of the sealing ledge (1.1, 2.1) which faces the roll shell (3) when used as intended that is different from that of the other temperature sensors (6.1) of the sensor unit (6).
- The sealing ledge system of claim 2, characterised in that each sensor unit (6) comprises a power supply, preferably a battery (6.3), and a microchip (6.2) having a radio module.
- The sealing ledge system of any one of claims 1 to 3, characterised in that the sealing ledge system (1, 2) comprises sealing ledge holders (1.2, 2.2), wherein each sealing ledge (1.1, 2.1) is inserted into a sealing ledge holder (1.2, 2.2), wherein at least one spray pipe (1.5, 2.5) is included in at least one sealing ledge holder (1.2, 2.2), wherein openings in the sealing ledge holder (1.2, 2.2), preferably having jets (1.4, 2.4) arranged therein, extend from the spray pipe (1.5, 2.5) to an outer side of the sealing ledge holder (1.2, 2.2).
- The sealing ledge system of any one of claims 1 to 4, characterised in that the sealing ledge system comprises sealing ledge holders (1.2, 2.2), wherein each sealing ledge (1.1, 2.1) is inserted into a sealing ledge holder (1.2, 2.2), wherein at least one adjusting member, via which the distance of the sealing ledge (1.1, 2.1) from the roll shell (3) is adjustable when used as intended, is present in at least one sealing ledge holder (1.2, 2.2), wherein the position of the adjusting member can be adjusted, and a desired position thereof maintained via a motor.
- The sealing ledge system of claim 5, characterised in that the adjusting member comprises a member slidable in a longitudinal direction of the sealing ledge (1.1, 2.1) which has at least one oblique surface, wherein the sealing ledge (1.1, 2.1) or a height-adjustable member connected to the sealing ledge (1.1, 2.1) is guided along said oblique surface.
- The sealing ledge system of any one of claims 5 and 6, characterised in that the sealing ledge (2.1) has a first section and a second section, wherein the adjusting member acts upon the second section of the sealing ledge (2.1), so that the distance of the second section of the sealing ledge (2.1) from the roll shell (3) can be adjusted so as to be different from the first section of the sealing ledge (2.1) when used as intended.
- The sealing ledge system of claim 7, characterised in that the adjustment pressure on the roll shell (3) of the first section of the sealing ledge (2.1) can be adjusted using an adjustment tube (2.3) when used as intended.
- The sealing ledge system of claim 7, characterised in that an adjusting member, via which the distance of the first section of the sealing ledge (2.1) from the roll shell (3) can be adjusted, is also present in the first section of the sealing ledge (2.1), wherein the position of the adjusting member can be adjusted, and a desired position thereof maintained, via a motor.
- The sealing ledge system of any one of claims 5 to 9, characterised in that a spring-elastic member is mounted between the sealing ledge (1.1, 2.1) and the adjusting member.
- The sealing ledge system of any one of claims 4 to 10, characterised in that an acoustic sensor (7) is included in or mounted on the sealing ledge holder (2.2).
- Use of a suction roll having the sealing ledge system of any one of claims 1 to 11 for dewatering sheet material, characterised in that a device for introducing lubrication water is associated with at least one sealing ledge (1.1, 2.1), wherein the amount of lubrication water introduced is regulated or controlled depending on the temperature of the respective sealing ledge (1.1, 2.1), which is measured by at least one temperature sensor (6.1).
- The use of claim 12, characterised in that the negative pressure inside the suction box (4) is recorded as the current pressure and the adjustment pressure of the sealing ledges (1.1, 2.1), or the distance of the sealing ledges (1.1, 2.1) from the roll shell (3) is regulated or controlled depending on the current pressure.
- The use of any one of claims 12 to 13, characterised in that the wear of the sealing ledges (1.1, 2.1) is recorded or monitored during operation by detecting signal disruptions by the temperature sensor (6.1) as the wear progresses.
- The use of any one of claims 12 to 14, characterised in that the noise level is recorded after or at the rear, second sealing ledge system (2) as seen in the direction of movement of the roll shell (3), and the opening angle of the gap between the rear area of the sealing ledge (2.11) and the roll shell (3) is regulated or controlled depending on the recorded noise level.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL15781852T PL3194655T3 (en) | 2014-09-15 | 2015-09-14 | Sealing strip system for a suction roll |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA50641/2014A AT516191B1 (en) | 2014-09-15 | 2014-09-15 | Sealing strip systems for suction rolls |
PCT/AT2015/050228 WO2016040974A2 (en) | 2014-09-15 | 2015-09-14 | Sealing strip systems for suction rolls |
Publications (2)
Publication Number | Publication Date |
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EP3194655A2 EP3194655A2 (en) | 2017-07-26 |
EP3194655B1 true EP3194655B1 (en) | 2021-11-03 |
Family
ID=54337062
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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EP15781852.7A Active EP3194655B1 (en) | 2014-09-15 | 2015-09-14 | Sealing strip system for a suction roll |
EP15781853.5A Active EP3194656B1 (en) | 2014-09-15 | 2015-09-14 | Sealing-strip holder and use thereof |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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EP15781853.5A Active EP3194656B1 (en) | 2014-09-15 | 2015-09-14 | Sealing-strip holder and use thereof |
Country Status (7)
Country | Link |
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US (2) | US10179973B2 (en) |
EP (2) | EP3194655B1 (en) |
CN (2) | CN106715792B (en) |
AT (2) | AT516191B1 (en) |
ES (2) | ES2902858T3 (en) |
PL (2) | PL3194656T3 (en) |
WO (2) | WO2016040975A1 (en) |
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CN111058328B (en) * | 2018-10-16 | 2024-04-09 | 李飞 | Vacuum roller of paper machine net press part |
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- 2014-09-15 AT ATA50641/2014A patent/AT516191B1/en not_active IP Right Cessation
-
2015
- 2015-07-24 AT ATA50655/2015A patent/AT516210B1/en not_active IP Right Cessation
- 2015-09-14 US US15/511,011 patent/US10179973B2/en active Active
- 2015-09-14 PL PL15781853T patent/PL3194656T3/en unknown
- 2015-09-14 ES ES15781852T patent/ES2902858T3/en active Active
- 2015-09-14 US US15/511,012 patent/US10184214B2/en active Active
- 2015-09-14 WO PCT/AT2015/050229 patent/WO2016040975A1/en active Application Filing
- 2015-09-14 EP EP15781852.7A patent/EP3194655B1/en active Active
- 2015-09-14 CN CN201580049030.4A patent/CN106715792B/en active Active
- 2015-09-14 CN CN201580049043.1A patent/CN106715793A/en active Pending
- 2015-09-14 ES ES15781853T patent/ES2902855T3/en active Active
- 2015-09-14 PL PL15781852T patent/PL3194655T3/en unknown
- 2015-09-14 WO PCT/AT2015/050228 patent/WO2016040974A2/en active Application Filing
- 2015-09-14 EP EP15781853.5A patent/EP3194656B1/en active Active
Also Published As
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US20170254019A1 (en) | 2017-09-07 |
PL3194656T3 (en) | 2022-03-07 |
AT516210A3 (en) | 2016-06-15 |
AT516210A2 (en) | 2016-03-15 |
US20170254020A1 (en) | 2017-09-07 |
EP3194656A1 (en) | 2017-07-26 |
ES2902858T3 (en) | 2022-03-30 |
WO2016040974A2 (en) | 2016-03-24 |
CN106715793A (en) | 2017-05-24 |
EP3194656B1 (en) | 2021-11-17 |
US10184214B2 (en) | 2019-01-22 |
ES2902855T3 (en) | 2022-03-30 |
PL3194655T3 (en) | 2022-02-28 |
CN106715792B (en) | 2019-05-17 |
US10179973B2 (en) | 2019-01-15 |
AT516191A1 (en) | 2016-03-15 |
CN106715792A (en) | 2017-05-24 |
EP3194655A2 (en) | 2017-07-26 |
WO2016040975A1 (en) | 2016-03-24 |
AT516191B1 (en) | 2016-08-15 |
WO2016040974A3 (en) | 2016-05-12 |
AT516210B1 (en) | 2017-04-15 |
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