EP1375741A2 - Dispositif et procédé pour influencer le profil de pression dans une presse - Google Patents

Dispositif et procédé pour influencer le profil de pression dans une presse Download PDF

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Publication number
EP1375741A2
EP1375741A2 EP03101511A EP03101511A EP1375741A2 EP 1375741 A2 EP1375741 A2 EP 1375741A2 EP 03101511 A EP03101511 A EP 03101511A EP 03101511 A EP03101511 A EP 03101511A EP 1375741 A2 EP1375741 A2 EP 1375741A2
Authority
EP
European Patent Office
Prior art keywords
press
shoe
press shoe
running direction
web running
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.)
Withdrawn
Application number
EP03101511A
Other languages
German (de)
English (en)
Other versions
EP1375741A3 (fr
Inventor
Gerd Komposch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1375741A2 publication Critical patent/EP1375741A2/fr
Publication of EP1375741A3 publication Critical patent/EP1375741A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses

Definitions

  • the invention relates to a device and a method for influencing which is used in the treatment of a material web extended press nip in the web running direction resulting pressure profile.
  • the material web can in particular be a paper or Trade cardboard web.
  • Press arrangements with press gaps extended in the direction of web travel, each formed between a press shoe and a counter surface are known (see e.g. DE 44 35 845 C, DE 196 31 638 A, DE 196 31 637 A).
  • the press or pressure shoe of a shoe press has so far been equipped with a Shoe contour manufactured that have been optimized for a specific product is. Should be different or new products in a paper machine be produced, which also requires different pressure profiles would only be possible with two measures. So can on the one hand, a new press shoe with one that is adapted to the new product Pressure profile can be installed. On the other hand, with plants with multi-row pressing elements through a different control the pressure elements, the pressure profile can be changed accordingly.
  • the first variant is different because changing the pressure shoe is very time-consuming.
  • the invention has for its object an improved device and to create an improved process of the type mentioned at the outset, in which the aforementioned disadvantages are eliminated.
  • this object is achieved by a device for Influencing yourself in a treatment of a web of material serving extended press nip in the web running direction resulting pressure profile, with at least one arranged on one side of the press nip, Press shoe adjustable in the direction of web travel.
  • the press shoe is preferably infinitely adjustable in the direction of web travel, with which a sensitive influence of the in the web running direction resulting pressure profile is possible.
  • the press shoe can run in the direction of web travel be movable, for example.
  • the device is that of a press belt such as e.g. a press jacket wrapped around and by at least one pressing element in the direction press shoe acted on a counter surface over at least one itself generally extending transversely to the web running direction, in the web running direction looks at the adjustable wedge bar located behind it in the direction of web travel adjustable against which the press shoe as a result of between it and the rotating press belt friction is pushed.
  • the press shoe is preferably with at least one stop provided, over which it lies against the wedge bar.
  • the wedge bar is convenient adjustable in the direction of its longitudinal axis.
  • the wedge rod is adjustable via a drivable spindle.
  • the spindle can e.g. be drivable via a hydraulic motor or the like.
  • the device is characterized in that the driving force is greater than one Transfer the movement thread from the spindle to the wedge bar and that this motion thread is designed and the wedge angle selected is that if there is no drive, a respective wedge bar setting by Self-locking is ensured. With the wedge bar setting is corresponding the respective press shoe setting is also secured.
  • the wedge rod is preferably mounted on a support body on which at least one pressure element acting on the press shoe is supported is.
  • the wedge rod is expediently by at least fixed a stop provided on the support body.
  • the press shoe can in particular also have several in the transverse direction considered to be provided side by side stops. there each stop can also have a separate wedge bar be assigned.
  • the different wedge bars are preferably separate drivable.
  • the wedge bars can be separated, for example Hydraulic motors or the like can be adjusted.
  • At least one displacement transducer can advantageously be used to determine the respective press shoe position may be provided.
  • the current position of the Print shoe can appear especially outside of the shoe press become.
  • the press shoe is preferably via a control and / or regulating device adjustable.
  • the adjustment of the press shoe can in particular from outside the shoe press in question. For the adjustment it is not necessary to remove the press jacket.
  • the press shoe can but can also be adjusted when the press jacket is removed.
  • the press shoe is preferably adjusted with the press relieved, whereby however, the adjustment can also take place during operation. If the press is unloaded, so is an adjustment of the press shoe both while running and possible with standing press belt or press jacket.
  • a measuring device for measuring the direction of travel in the web is preferred resulting pressure profile provided.
  • the press shoe can for measuring the pressure profile especially in the area between the pressure shoe and the pressure belt be provided.
  • At least one is preferred via the control and / or regulating device Target pressure profile can be specified.
  • Target pressure profile can be specified.
  • the press shoe can be sectioned when viewed in the transverse direction.
  • a preferred practical embodiment of the invention is characterized in that the press shoe in the transverse direction considered section by section in the direction of web travel can be acted upon and that by means of a corresponding application of the Press shoe simultaneously several resulting in the web running direction Press pressure profiles are adjustable.
  • the press shoe stops over several hydraulic motors or the like individually controlled different Pressure profiles can be set simultaneously, e.g. For improvement of the moisture cross profile can be used.
  • Pressure measuring bores can exceed the maximum pressure of the pressure profile each contact element or cylinder can be measured. Will that turn into Compression pressure profile on one or more web direction Places measured, so the pressure profile due to the maximum pressure can be determined on each contact element or piston.
  • the object specified at the outset is also achieved according to the invention through a procedure to influence yourself in one of the treatment an extended press nip serving a material web in the direction of web travel resulting pressure profile, in which at least one on one side the press nip arranged in the web running direction to influence the pressure profile accordingly.
  • the setting of the resulting in the direction of web travel can Press pressure profile especially depending on certain operating conditions such as. the respective type of felt, the respective type of paper and / or the like.
  • the process is combined with the setting or control and / or regulation of the pressing pressure profile resulting in the web running direction controlled and / or regulated the pressure cross profile.
  • there can press the cross pressure profile in particular via the press shoe Pressure elements controlled and / or regulated accordingly become.
  • the pressure profile maximum and thus the dry content after the press and accordingly the production increase. If a high volume is desired for a product, the pressure profile maximum can be reduced. This then increases Volume. The dryness after the press drops slightly.
  • FIGS. 1 and 2 show a schematic representation of an exemplary embodiment of a device 10 for influencing the elongated press nip 12 in the web running direction L which is used in the treatment of a material web.
  • the material web can in particular be a paper or cardboard web.
  • This device 10 comprises at least one press shoe 14 which is arranged on one side of the press nip 12 and can be adjusted in the web running direction L.
  • the press shoe 14 is wrapped in a press belt 16, which can in particular be the press jacket of a so-called shoe press roll.
  • the pressure shoe 12 is acted upon by at least one pressure element 18 in the direction of a counter surface 20.
  • the press nip 12 is thus provided between the press belt 16 and the counter surface 20, which can be formed, for example, by a counter roller 22.
  • the press shoe 14 can in particular be stepless in the web running direction L be adjustable.
  • the press shoe 14 there is at least one extending generally transversely to the web running direction L, in the web running direction L viewed adjustable shoes arranged behind the press shoe 14 Wedge bar 24 provided.
  • the press shoe 14 is due to the between him and the rotating press belt 16 occurring friction in the direction of web travel L pushed against the wedge rod 24.
  • the press shoe can 14 be provided with at least one stop 26 via which it bears against this wedge rod 24.
  • the press shoe lies while the relevant shoe press is operating 14 so constantly on the wedge rod 24, so that this one at any time respective shoe adjustment in web running direction L is possible.
  • the wedge rod is 24 in the direction of its longitudinal axis, here in a direction transverse to Web direction L, adjustable.
  • a drivable one Spindle 28 may be provided.
  • the spindle 28 can, for example, by a hydraulic motor 30 or the like can be driven.
  • the wedge rod 24 is mounted on a support body 32 on which the press shoe 14 in the direction of counter surface 20 Pressing elements 18, which are, for example, cylinder / piston units can act (cf. in particular Figure 1) are supported.
  • the wedge rod 24 is by stops provided on the support body 32 34 fixed in the web running direction L. In addition, the wedge bar 24 through these stops 34 during a respective adjustment in the transverse direction be led.
  • the wedge rod has 24 at least one wedge surface 38 which with a wedge surface 40 of the Press shoe 14 associated stop 26 cooperates so that with a respective adjustment of the wedge bar 24 in the transverse direction of the press shoe 14 in the web running direction L is shifted accordingly.
  • the Wedge bar 24 can in particular provide several such wedge surfaces 38 be, each of these wedge surfaces 38 each with a press shoe 14 associated stop 26 cooperates. For example one at least essentially over the entire width of the press shoe extending wedge rod 24 may be provided.
  • the driving force is from the spindle 28 via a movement thread 36 transferred to the wedge rod 24.
  • This movement thread can 36 designed and the wedge angle selected so that when missing Drive a respective wedge bar setting and accordingly a respective one Shoe setting is secured by self-locking.
  • the current position of the press shoe 14 is over one or more Displacement sensor 42 (see FIG. 1) is measured and can be outside, for example be shown in the shoe press.
  • the adjustment of the press shoe 14 can be controlled, for example, from outside the shoe press and / or regulated.
  • the press shoe 14 can in particular via a control and / or regulating device 44 can be set in the desired manner. On this control and / or regulating device 44 can be the displacement sensor 42 be connected. The respective actual position of the press shoe 14 can be seen in this control and / or regulating device 44 thus with a respective one Setpoint are compared to match the setpoint.
  • the press shoe 14 can be used to measure the direction L resulting pressure profile with in the area between press shoe 14 and Press tape 16 opening pressure measuring holes 46 may be provided. How can be seen from Figure 2, several such pressure measurement holes 46 can be arranged one behind the other in the web running direction L.
  • the control and / or regulating device 44 can expediently at least one target pressure profile is specified.
  • Such an embodiment of the device is corresponding, for example 10 conceivable in the case of a corresponding adjustment of the press shoe 14 the pressing pressure profile resulting in the web running direction L. is controllable and / or regulatable.
  • the press shoe 14 can be continuous when viewed in the transverse direction or be sectioned.
  • Via pressure measuring bores 48 provided in the press shoe 14 can the maximum pressure of the pressure profile over each pressing element 18 can be measured. Since the resultant in the direction of web travel L. Pressure profile can be measured at one or more points due to the maximum pressure, the pressure profile on each contact element 18 can be determined.
  • the setting of the pressing pressure profile resulting in the web running direction L. can, for example, depending on certain operating conditions such as. the respective type of felt, the respective type of paper and / or the like.
  • the pressing pressure cross profile via the various pressing elements 18 can be controlled and / or regulated in the desired manner.
  • FIG. 3 shows a diagram in which, purely by way of example, three different resulting in correspondingly different press shoe positions Longitudinal press pressure profiles are shown. Here are those specified in “MPa” Press above the one given in “millimeters” in the direction of web travel plotted from a reference point distance. How based on the curves A for three different shoe settings - C can be seen, the shoe setting A results in a higher one maximum pressure value than with shoe setting B, and with shoe setting B again a higher maximum pressure value than when setting the shoes C.
  • the pressure profiles shown in the diagram can e.g. for three different Products may be provided.
  • the curves in question can generated by moving the press shoe 14 in the web running direction L. become.

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  • Paper (AREA)
EP03101511A 2002-06-25 2003-05-26 Dispositif et procédé pour influencer le profil de pression dans une presse Withdrawn EP1375741A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002128308 DE10228308A1 (de) 2002-06-25 2002-06-25 Vorrichtung und Verfahren zur Beeinflussung eines Pressdruckprofils
DE10228308 2002-06-25

Publications (2)

Publication Number Publication Date
EP1375741A2 true EP1375741A2 (fr) 2004-01-02
EP1375741A3 EP1375741A3 (fr) 2004-06-30

Family

ID=7714703

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03101511A Withdrawn EP1375741A3 (fr) 2002-06-25 2003-05-26 Dispositif et procédé pour influencer le profil de pression dans une presse

Country Status (2)

Country Link
EP (1) EP1375741A3 (fr)
DE (2) DE20218393U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005080674A1 (fr) * 2004-02-19 2005-09-01 Vaahto Oy Dispositif de charge pour une presse de chaussure
WO2005080675A1 (fr) * 2004-02-19 2005-09-01 Vaahto Oy Procede et appareil utilises conjointement a une presse a sabot

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR0312215B1 (pt) * 2002-06-25 2013-08-27 metodo e aparelho para influenciar e/ou monitorar um perfil de prensagem

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4344165A1 (de) * 1993-12-23 1995-06-29 Voith Gmbh J M Verfahren zum Glätten einer Faserstoffbahn in einem verlängerten Glättspalt und Vorrichtung zur Durchführung des Verfahrens
EP0674043A1 (fr) * 1994-03-18 1995-09-27 Voith Sulzer Papiermaschinen GmbH Dispositif pour le traitement d'une bande fibreuse
DE4435845C1 (de) * 1994-10-07 1996-01-25 Voith Sulzer Papiermasch Gmbh Preßwalze
DE19631638A1 (de) * 1996-08-05 1998-02-12 Voith Sulzer Papiermasch Gmbh Pressenanordnung
DE19631637A1 (de) * 1996-08-05 1998-02-12 Voith Sulzer Papiermasch Gmbh Pressenanordnung
US5753084A (en) * 1994-07-06 1998-05-19 Voith Sulzer Papiermaschinen Gmbh Elongated gap press with adjustable length

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI65103C (fi) * 1982-05-05 1984-03-12 Tampella Oy Ab Laongzonspress foer en pappersmaskin

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4344165A1 (de) * 1993-12-23 1995-06-29 Voith Gmbh J M Verfahren zum Glätten einer Faserstoffbahn in einem verlängerten Glättspalt und Vorrichtung zur Durchführung des Verfahrens
EP0674043A1 (fr) * 1994-03-18 1995-09-27 Voith Sulzer Papiermaschinen GmbH Dispositif pour le traitement d'une bande fibreuse
US5753084A (en) * 1994-07-06 1998-05-19 Voith Sulzer Papiermaschinen Gmbh Elongated gap press with adjustable length
DE4435845C1 (de) * 1994-10-07 1996-01-25 Voith Sulzer Papiermasch Gmbh Preßwalze
DE19631638A1 (de) * 1996-08-05 1998-02-12 Voith Sulzer Papiermasch Gmbh Pressenanordnung
DE19631637A1 (de) * 1996-08-05 1998-02-12 Voith Sulzer Papiermasch Gmbh Pressenanordnung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005080674A1 (fr) * 2004-02-19 2005-09-01 Vaahto Oy Dispositif de charge pour une presse de chaussure
WO2005080675A1 (fr) * 2004-02-19 2005-09-01 Vaahto Oy Procede et appareil utilises conjointement a une presse a sabot
US7582192B2 (en) 2004-02-19 2009-09-01 Vaahto Oy Loading device for a shoe press
CN1961115B (zh) * 2004-02-19 2012-07-18 瓦图公司 改变靴式压榨部压榨辊隙中的加载压力分布的方法和装置

Also Published As

Publication number Publication date
EP1375741A3 (fr) 2004-06-30
DE10228308A1 (de) 2004-01-22
DE20218393U1 (de) 2003-03-20

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