EP0889165B1 - Rouleau aspirant pour une machine à papier - Google Patents

Rouleau aspirant pour une machine à papier Download PDF

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Publication number
EP0889165B1
EP0889165B1 EP98111852A EP98111852A EP0889165B1 EP 0889165 B1 EP0889165 B1 EP 0889165B1 EP 98111852 A EP98111852 A EP 98111852A EP 98111852 A EP98111852 A EP 98111852A EP 0889165 B1 EP0889165 B1 EP 0889165B1
Authority
EP
European Patent Office
Prior art keywords
suction
roll
suction box
box
suction roll
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98111852A
Other languages
German (de)
English (en)
Other versions
EP0889165A3 (fr
EP0889165A2 (fr
Inventor
Joachim Grabscheid
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
Priority claimed from DE1997128824 external-priority patent/DE19728824A1/de
Priority claimed from DE1997128823 external-priority patent/DE19728823A1/de
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0889165A2 publication Critical patent/EP0889165A2/fr
Publication of EP0889165A3 publication Critical patent/EP0889165A3/fr
Application granted granted Critical
Publication of EP0889165B1 publication Critical patent/EP0889165B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • D21F3/10—Suction rolls, e.g. couch rolls

Definitions

  • the invention relates to a suction roll for a paper machine, with a roller jacket over which a conveyor belt for one draining fibrous web is guided with a first external Suction box that partially surrounds the suction roller from the outside and applies a vacuum to the fibrous web, wherein the suction box has at least one gusset between the The fibrous web and the suction roll are vacuumed.
  • Such a suction roll is known from GB-A-713 190.
  • the known arrangement leads a felt over a fibrous web a leader to subsequent nips from an upper one Press roll and two lower press rolls are formed.
  • the first nip may be formed with a lower press roll, the is designed as a suction roll.
  • a first suction box In front of this suction roller is a arranged first suction box, on the one hand against the suction roller and on the other hand against the conveyor belt in the area between sealed the gusset and an upstream leadership role is.
  • a second suction box is provided below the upper press roll and between the upstream suction roll and the subsequent lower press roll, which extends into the two Gusset between the upper press roll, the suction roll and the subordinate lower press roll reaches in and down against the surface of the suction roller or the downstream one Press roll is sealed.
  • the drainage effect of the suction roller can be improve the upstream suction box, but the sealing is done of the suction box against the conveyor belt nearby the inlet gusset and near the upstream guide role insufficiently due to a sealing plate that extends over the entire width of the suction box and from the upstream guide role until just before the inlet gusset enough.
  • a sealing plate that extends over the entire width of the suction box and from the upstream guide role until just before the inlet gusset enough.
  • Such a wide sealing plate is complex and expensive, contributes to the wear of the conveyor belt and is for high web running speeds unsuitable.
  • That is second suction box on the other side of the suction roll relative complex and expensive and due to the limited space difficult to assemble.
  • the suction roll is also through the suction box enclosed on both sides, such as the AT-A-340 763.
  • the problem of Intake of incorrect air is also through the suction box enclosed on both sides, such as the AT-A-340 763.
  • the invention is therefore based on the object of a suction roll to create that particular for use in the field a wire or press section of a paper machine is and where the intake of incorrect air in the area of the Zwikkels is largely avoided.
  • a suction roll in addition to the type mentioned at least a second suction box is provided for the first suction box is that adjoins the first suction box and applies a vacuum to the fibrous web.
  • a second suction box according to the invention that is adjacent to the first suction box becomes a stable, rigid support body created, which is also very wide paper machines have sufficient stability for support offers a sealing strip in the gusset area. Further is achieved by using a second suction box according to the invention, immediately adjacent to the first suction box, the Suction zone extended so that a continuous, uninterrupted Total suction zone is created, which makes the suction effect considerable is improved. This is in contrast to the arrangement one isolated from the suction roll at a distance from it arranged suction box, so no such effective suction can be achieved.
  • the fibrous web is Vacuum applied through depressions in the roller jacket.
  • the depressions can advantageously be used as blind bores be formed in the surface of the roll shell.
  • the first suction box right into the inlet gusset between the conveyor belt and the roll shell, and the second suction box is upstream of the first suction box in the direction of web travel.
  • the first is Suction box designed as a central suction box, which differs from the Inlet gusset extends to the outlet gusset, in the direction of web travel seen a second suction box in front of the suction roller is arranged, which is sealed against the conveyor belt and extends to the first suction box, and being in the direction of web travel seen a third suction box behind the suction roller is arranged, which extends to the first suction box and is sealed against the conveyor belt.
  • this is a particularly strong one Vacuum on the conveyor belt or the one to be drained Transfer fibrous web. Furthermore, a better adjustment can be made of the vacuum to the special operating conditions, because the suction boxes in question are either the same Negative pressure or with different negative pressures can be operated. For example, the seen in the web running direction upstream second suction box first apply a lower vacuum, while then in the area in which the fibrous web and the conveyor belt are in contact with the roll shell, a larger negative pressure is generated and in the subsequent third suction box again a lower negative pressure is applied to disadvantageous Influences on the fibrous web at extremely high Avoid web running speeds. Such use of further suction boxes before and after the central suction box is associated with relatively little additional effort because practical to achieve the necessary rigidity of the external Suction box anyway rigid cross sections in the area of Inlet and outlet gussets are necessary.
  • suction roll according to the invention in comparison to conventional suction rolls with internal suction boxes in the fact that the holes are constantly under negative pressure, while with conventional suction rolls with internal suction boxes the holes as soon as they leave the suction zone of the suction roll, are exposed to ambient pressure, causing the Bores after re-entry into the suction zone of the suction roller must first be evacuated again. This leads to a high blower output, which is avoided according to the invention.
  • the vacuum is in the suction boxes preferably adjustable separately in order to optimize the adjustment to allow different operating conditions.
  • the suction roll when using a first central suction box Roll shell, which is penetrated by holes.
  • a suction roll according to the invention is overall with the Number 30 denotes. It comprises a rotatably mounted roller jacket 32, provided numerous depressions in the surface are, which are designed as blind bores 38.
  • a conveyor belt 14 runs over the roller jacket 32, for example in the form of a felt band or a sieve on which a fibrous web to be dewatered in the form of a paper web is guided, which is indicated in Fig. 1 with a dashed line and is designated by the number 16.
  • the area in front of the line of impact between the conveyor belt 14 and the roll shell 12 is as an inlet gusset 25 or as an inlet gusset known while moving to the dividing line of the conveyor belt 14 subsequent to leaving the roll shell 12 Area known as outlet gusset 26 or drain gusset.
  • An external first suction box is located below the roll shell 32 40 is provided, which partially encloses the roller shell 12, and which is a flat suction section 42 to extends into the area of the inlet gusset 25.
  • a second suction box 46 Seen in the direction of web travel 24 is in front of the first suction box 40 a second suction box 46 is arranged, which directly to the first suction box 40 is adjacent and from the area of the inlet gusset 25 along the conveyor belt 14 against the direction of web travel 24 extends.
  • a sealing strip 48 In Area of the inlet gusset 25 is provided, as well as a sealing strip 49 at the end opposite the inlet gusset 25 of the second suction box 46.
  • the first suction box is also with the sealing strip 48 in the region of the inlet gusset 25 sealed, and at the other end with another sealing strip 41 against the surface of the roll shell 32.
  • Both suction boxes 40 and 46 are connected to a suitable vacuum source or a blower 43 or 47 connected.
  • FIG. 2 A modification of a suction roll according to the invention is shown in FIG. 2 shown and designated overall with the number 130.
  • suction roll 130 includes a central suction box 140, the roll shell 112 of the suction roll 130 from the inlet gusset 125 encloses up to the outlet gusset 126.
  • the first suction box 140 is seen in the web running direction 124 upstream of the second suction box 142, which extends along the conveyor belt 114 extends to the inlet gusset 125 and again by sealing strips 144 on the inlet side and 146 in the area of the inlet gusset 125 against the conveyor belt 114 is sealed, over which the fibrous web 116 is guided.
  • Suction box 148 which extends from the outlet gusset 126 extends in the direction of web travel 124 below the conveyor belt 114 and again by a sealing strip 152 in the area of Outlet gusset 126 and through a sealing strip 150 on the opposite Is sealed against the conveyor belt 114.
  • Both the central suction box 140 and the second suction box 142 and the third suction box 148 are in turn connected to one suitable vacuum source connected as by the arrows 141 or 143 or 149 is indicated.
  • the roll shell 112 of the suction roll 130 is of bores 118 interspersed so that a suction of the conveyor belt 114 in Area between the inlet gusset 125 and the outlet gusset 126 from the bottom through the roll shell 112 of the suction roll 130 is done.

Landscapes

  • Paper (AREA)
  • Advancing Webs (AREA)

Claims (8)

  1. Rouleau aspirant pour une machine à papier, comprenant une enveloppe de rouleau (32 ; 112), par l'intermédiaire de laquelle est guidée une bande de transport (14 ; 114) pour une bande de matière fibreuse (16 ; 116) à déshydrater, avec une première caisse aspirante exteme (40 ; 140) qui entoure partiellement le rouleau aspirant (30 ; 130) de l'extérieur et qui sollicite avec une dépression la bande de matière fibreuse (16 ; 116), la caisse aspirante (40 ; 140) aspirant au moins un coin (25 ; 125, 126) entre la bande de matière fibreuse (16 ; 116) et le rouleau aspirant (30 ; 130), caractérisé en ce qu'au moins une deuxième caisse aspirante (46 ; 142, 148) est prévue, laquelle est adjacente à la première caisse aspirante (40 ; 140) et sollicite la bande de matière fibreuse (16 ; 116) avec une dépression.
  2. Rouleau aspirant selon la revendication 1, caractérisé en ce que la bande de matière fibreuse (16) est sollicitée avec une dépression par le biais de renfoncements dans l'enveloppe du rouleau (32).
  3. Rouleau aspirant selon la revendication 2, caractérisé en ce que les renfoncements sont réalisés sous la forme d'alésages borgnes (38) dans la surface de l'enveloppe du rouleau (32).
  4. Rouleau aspirant selon l'une quelconque des revendications précédentes, caractérisé en ce que la première caisse aspirante (40) s'étend jusque dans le coin d'entrée (25) entre la bande de transport et l'enveloppe du rouleau (32), et en ce que la deuxième caisse aspirante (46) est placée avant la première caisse aspirante (40) dans la direction d'avance de la bande (24).
  5. Rouleau aspirant selon la revendication 1, caractérisé en ce que la première caisse aspirante (140) est réalisée en tant que caisse aspirante centrale, qui s'étend depuis le coin d'entrée (125) jusqu'au coin de sortie (126), en ce que, vu dans la direction d'avance de la bande (124), une deuxième caisse aspirante (142) est placée avant le rouleau aspirant (130), laquelle est isolée de manière étanche vis-à-vis de la bande de transport (114) et s'étend jusqu'à la première caisse aspirante (140), et en ce que, vu dans la direction d'avance de la bande (124), une troisième caisse aspirante (148) est placée après le rouleau aspirant (130), laquelle s'étend jusqu'à la première caisse aspirante (140) et est isolée de manière étanche vis-à-vis de la bande de transport (114).
  6. Rouleau aspirant selon la revendication 5, caractérisé en ce que le rouleau aspirant (130) présente une enveloppe de rouleau (112) qui est traversée par des alésages (118).
  7. Rouleau aspirant selon l'une quelconque des revendications précédentes, caractérisé en ce que la dépression est ajustable de manière séparée dans les caisses aspirantes (40, 46 ; 140, 142, 148).
  8. Rouleau aspirant selon l'une quelconque des revendications précédentes, caractérisé en ce que, pour l'isolation étanche des caisses aspirantes (40, 46 ; 140, 142, 148), on prévoit des nervures d'étanchéité (41, 48, 49 ; 144, 146, 150, 152) s'étendant transversalement à la direction d'avance de la bande (24 ; 124).
EP98111852A 1997-07-05 1998-06-26 Rouleau aspirant pour une machine à papier Expired - Lifetime EP0889165B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19728824 1997-07-05
DE1997128824 DE19728824A1 (de) 1997-07-05 1997-07-05 Saugwalze für eine Papiermaschine
DE1997128823 DE19728823A1 (de) 1997-07-05 1997-07-05 Saugwalze für eine Papiermaschine
DE19728823 1997-07-05

Publications (3)

Publication Number Publication Date
EP0889165A2 EP0889165A2 (fr) 1999-01-07
EP0889165A3 EP0889165A3 (fr) 1999-12-08
EP0889165B1 true EP0889165B1 (fr) 2003-01-15

Family

ID=26038057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98111852A Expired - Lifetime EP0889165B1 (fr) 1997-07-05 1998-06-26 Rouleau aspirant pour une machine à papier

Country Status (3)

Country Link
US (1) US5968319A (fr)
EP (1) EP0889165B1 (fr)
DE (1) DE59806909D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2085512A1 (fr) 2008-01-30 2009-08-05 Voith Patent GmbH Dispositif d'aspiration pour une machine fabriquant une bande de matière fibreuse
DE102008002035A1 (de) 2008-05-28 2009-12-03 Voith Patent Gmbh Saugeinrichtung für eine eine Faserstoffbahn herstellende Maschine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020176617A1 (en) * 2001-05-22 2002-11-28 Pti Advanced Filtration, Inc. System and method for continuous integrity testing of a material web
US7903028B2 (en) * 2006-12-18 2011-03-08 Sirf Technology Holdings, Inc. Ephemeris download from weak signals
AT511975B1 (de) * 2011-10-12 2015-06-15 Andritz Ag Maschf Transfersaugwalze zum überführen einer materialbahn

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE311570C (fr) *
GB713190A (en) * 1951-09-01 1954-08-04 Ralph Chalinor Heys Improvements in or relating to paper-making machines
US3057402A (en) * 1959-12-31 1962-10-09 David R Webster Silent suction roll assembly
US3291680A (en) * 1963-10-17 1966-12-13 Beloit Corp Cylinder machine press assembly
AT340763B (de) * 1974-05-02 1978-01-10 Voith Ag J M Saugkasten fur papiermaschinen u.dgl.
CH608257A5 (en) * 1976-07-20 1978-12-29 Escher Wyss Gmbh Suction device for a papermaking machine
GB1574341A (en) * 1976-09-13 1980-09-03 Valmet Oy Method of and means for applying suction to a web suspension layer felt forming wire or assembly of such in a paper-making machine
AT359368B (de) * 1978-01-16 1980-11-10 Escher Wyss Gmbh Doppelsiebpapiermaschine
US4359828A (en) * 1979-11-05 1982-11-23 Weyerhaeuser Company Vacuum box for use in high speed papermaking
FI78133C (fi) * 1980-03-14 1989-06-12 Valmet Oy Foerfarande vid viradelen foer en pappersmaskin samt dubbelviraformare.
FI873034A (fi) * 1987-07-09 1989-01-10 Tampella Oy Ab Avvattningszon i en pappersmaskin.
DE4103040A1 (de) * 1991-02-01 1992-08-06 Freiberg Papier Maschwerke Vorrichtung zur entwaesserung von faserstoffbahnen
FI933624A (fi) * 1993-08-17 1995-02-18 Enso Gutzeit Oy Paperi- ja kartonkikoneen laite sekä sen käyttö

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2085512A1 (fr) 2008-01-30 2009-08-05 Voith Patent GmbH Dispositif d'aspiration pour une machine fabriquant une bande de matière fibreuse
DE102008000178A1 (de) 2008-01-30 2009-08-06 Voith Patent Gmbh Saugeinrichtung für eine eine Faserstoffbahn herstellende Maschine
DE102008002035A1 (de) 2008-05-28 2009-12-03 Voith Patent Gmbh Saugeinrichtung für eine eine Faserstoffbahn herstellende Maschine

Also Published As

Publication number Publication date
US5968319A (en) 1999-10-19
EP0889165A3 (fr) 1999-12-08
EP0889165A2 (fr) 1999-01-07
DE59806909D1 (de) 2003-02-20

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