EP0889165A2 - Rouleau aspirant pour une machine à papier - Google Patents

Rouleau aspirant pour une machine à papier Download PDF

Info

Publication number: EP0889165A2
Authority: EP; European Patent Office
Prior art keywords: suction; suction box; roll; box; roller
Prior art date: 1997-07-05
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.): Granted

Application number

EP98111852A

Other languages

German (de)

English (en)

Other versions

EP0889165B1 (fr

EP0889165A3 (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 Sulzer Papiermaschinen GmbH

Voith Sulzer Papiertechnik 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.)

1997-07-05

Filing date

1998-06-26

Publication date

1999-01-07

1997-07-05 Priority claimed from DE1997128824 external-priority patent/DE19728824A1/de

1997-07-05 Priority claimed from DE1997128823 external-priority patent/DE19728823A1/de

1998-06-26 Application filed by Voith Sulzer Papiermaschinen GmbH, Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Sulzer Papiermaschinen GmbH

1999-01-07 Publication of EP0889165A2 publication Critical patent/EP0889165A2/fr

1999-12-08 Publication of EP0889165A3 publication Critical patent/EP0889165A3/fr

2003-01-15 Application granted granted Critical

2003-01-15 Publication of EP0889165B1 publication Critical patent/EP0889165B1/fr

2018-06-26 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

Images

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 encloses 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 roll 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 moved through the suction box enclosed on both sides, such as the AT-A-340 763.
the problem of Intake of incorrect air is also moved 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 and where the sucking in of incorrect air in the area of the gusset 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 that is adjacent to the first suction box.
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 significant 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 either have 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 bores 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, which causes 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 so as to optimize the adjustment to enable 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 shell 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 gusset outlet.
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 web running direction 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 roller shell 32.
Both suction boxes 40 and 46 are connected to a suitable vacuum source or a fan 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.
the suction roll 130 includes a central suction box 140, the roller shell 112 of the suction roller 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.
the negative pressure in the individual suction boxes 40, 46 or 140, 142, 148 separately adjustable can be to optimally adapt to each To allow operating conditions.

Landscapes

Paper (AREA)
Advancing Webs (AREA)

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
DE1997128824 DE19728824A1 (de)	1997-07-05	1997-07-05	Saugwalze für eine Papiermaschine
DE19728824		1997-07-05
DE1997128823 DE19728823A1 (de)	1997-07-05	1997-07-05	Saugwalze für eine Papiermaschine
DE19728823		1997-07-05

Publications (3)

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

Families Citing this family (5)

* 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
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
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.
FI873034A7 (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
FI933624L (fi) *	1993-08-17	1995-02-18	Enso Gutzeit Oy	Paperi- ja kartonkikoneen laite sekä sen käyttö

1998
- 1998-06-26 EP EP98111852A patent/EP0889165B1/fr not_active Expired - Lifetime
- 1998-06-26 DE DE59806909T patent/DE59806909D1/de not_active Expired - Lifetime
- 1998-07-02 US US09/109,103 patent/US5968319A/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
DE59806909D1 (de)	2003-02-20
EP0889165B1 (fr)	2003-01-15
EP0889165A3 (fr)	1999-12-08
US5968319A (en)	1999-10-19

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Date	Code	Title	Description
1998-11-20	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
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1999-12-08	AK	Designated contracting states	Kind code of ref document: A3 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
1999-12-08	AX	Request for extension of the european patent	Free format text: AL;LT;LV;MK;RO;SI
1999-12-29	RAP1	Party data changed (applicant data changed or rights of an application transferred)	Owner name: VOITH SULZER PAPIERTECHNIK PATENT GMBH
2000-08-02	17P	Request for examination filed	Effective date: 20000608
2000-08-16	AKX	Designation fees paid	Free format text: DE FI SE
2000-12-20	RAP1	Party data changed (applicant data changed or rights of an application transferred)	Owner name: VOITH PAPER PATENT GMBH
2002-06-11	GRAG	Despatch of communication of intention to grant	Free format text: ORIGINAL CODE: EPIDOS AGRA
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2002-07-31	17Q	First examination report despatched	Effective date: 20020619
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