EP1795649A1 - Rouleau pour machine à papier - Google Patents
Rouleau pour machine à papier Download PDFInfo
- Publication number
- EP1795649A1 EP1795649A1 EP06122408A EP06122408A EP1795649A1 EP 1795649 A1 EP1795649 A1 EP 1795649A1 EP 06122408 A EP06122408 A EP 06122408A EP 06122408 A EP06122408 A EP 06122408A EP 1795649 A1 EP1795649 A1 EP 1795649A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- sealing strip
- suction box
- sealing
- suction
- 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.)
- Granted
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/10—Suction rolls, e.g. couch rolls
Definitions
- the invention generally relates to a blowing or suction roll of a machine for producing and / or finishing a paper, cardboard, tissue or another material web, in particular fibrous web, with a rotatable, perforated roll shell and a pressure or suction box, with a Overpressure source or a vacuum source is connected.
- the present invention relates to a method of manufacturing a pressure or suction box for such a blowing or suction roll.
- blowing or suction rolls in paper machines.
- Such rollers have a perforated lateral surface on which zones are formed by the pressure or suction box with an overpressure or a negative pressure.
- the pressure or suction box is usually stationary, whereas the roll shell is rotated over the box.
- the former or the headbox
- the press section and the dryer section and other areas come into consideration.
- the pressure or suction boxes are usually arranged radially within the rotating roll shell over the entire or substantially the entire axial length of the roll shell and are provided with sealing strips which are pressed to seal the pressure zones or suction zones on the roll shell from the inside against the same or with be positioned at a predetermined small distance from this.
- different zones can be formed with mutually different pressures on the roll shell, which are sealed by one or more corresponding sealing strips against each other in the rule.
- the sealing surfaces of the sealing strips or the bearing surfaces of sealing surface holders, by which the sealing strips are held, for example, on the suction box and after its assembly relative to the roll shell, are conventionally carried out as flat as possible to a uniform sealing strip spacing against the inner surface of the roll shell or a uniform pressing of the sealing strips against to reach the inner surface of the roll mantle.
- This uniform spacing or the uniform contact pressure counteracts the phenomenon that with long rollers and thus correspondingly axially extending suction boxes a deflection of the suction box adjusts, which is severely limited in terms of still sufficient sealing or a maximum permissible sealing strip wear, for example seven millimeters. If the specified distance is exceeded, a uniform seal is no longer possible or the sealing strips wear out unevenly and quickly.
- the invention has for its object to provide a method for producing a pressure or suction box for a paper machine roll or the like, through which said problems of bending of the printing or Suction box are overcome without significantly increasing the cost of production. Furthermore, a blow or suction roll of a paper machine or the like should be specified, which has a correspondingly produced pressure or suction box.
- suction box for a suction roll of a paper machine.
- the invention is also applicable to printing boxes for blow rolls and other machines for the production of a material web, in particular fibrous web.
- the box will hereinafter be referred to as a suction box and the roller as a suction roller, which are connected to a vacuum source.
- the inventive method is used to produce a suction box for a suction roll of a paper machine or the like, wherein the suction roll comprises a rotatable, perforated roll shell and in the mounted state, the suction box to form in the known manner, one or more suction zones on the roll shell. Accordingly, the suction box is connected to a vacuum source and associated with the roll shell so that it applies a predetermined area with a negative pressure on the inner surface of the roll shell.
- the area is sealed by at least one sealing strip, usually a plurality of sealing strips of the suction box from the inside against the roll shell, the sealing strip or the sealing strips each having / have a sealing surface which is pressed either in operation against the roll shell or with a predetermined gap distance , For example, from one to five millimeters, in particular three millimeters, is positioned relative to the inner surface of the roll shell.
- a sealing strip usually a plurality of sealing strips of the suction box from the inside against the roll shell, the sealing strip or the sealing strips each having / have a sealing surface which is pressed either in operation against the roll shell or with a predetermined gap distance , For example, from one to five millimeters, in particular three millimeters, is positioned relative to the inner surface of the roll shell.
- the inventive method is characterized in that either the sealing surface of the sealing strip and / or a bearing surface for the sealing strip on which the sealing strip during operation of the suction roll rests at least indirectly, with a convex or concave curvature along the longitudinal axis of the sealing strip and thus of the suction box and the suction roll is produced.
- a convex curvature that is, a barrel-like curvature, is always provided when the sealing strip is intended and positioned so that it is pressed from bottom to top against the roll shell or is positioned at a predetermined distance from this.
- a concave curvature is provided when the sealing strip is pressed from top to bottom against the roll shell or is positioned at a predetermined distance from this.
- the sealing strip is positioned from bottom to top at or with a gap distance from the inner surface of the roll shell, so the convex curvature of the sealing surface of the sealing strips compensates for the deflection of the suction box over its axial length, so that in Operation, the sealing surface is flat or substantially flat.
- the convex curvature can be done either by appropriate editing of the sealing surface of the sealing strip itself or by appropriate editing of the said bearing surface for the sealing strip, the sealing strip follows due to their elasticity of the convex bearing surface in shape, that is, the sealing strip bends along the convex bearing surface so she usually gets tired of this.
- the concave curvature of the sealing surface compensates for the deflection of the suction box.
- the sealing surface is again substantially or completely flat.
- the suction box in particular has a sealing strip holder, in which the described bearing surface is designed for the sealing strip.
- a sealing strip holder in which the described bearing surface is designed for the sealing strip.
- a hose which can be filled with a pressure medium and which directly bears the sealing strip on itself is positioned on the support surface.
- the tube follows the curvature in the support surface and gives this curvature, so to speak, to the sealing strip, which also follows the curvature and, even if it was previously listed with a right-angled, straight cross-section, bends accordingly, so that the sealing surface curves.
- the support surface below the tube which can be filled with air, for example, can also be designed in stages, the tube compensates for the discontinuities of the stages and the sealing strip provides a steadily curved support surface available.
- a plurality of correspondingly executed or overlying sealing strips may be provided, for example, individually or in groups selectively positioned or pressed against the inner surface of the roll shell to the desired concave or convex Surface of the sealing surface produce.
- the concave or convex surface in this case has a surface course with discontinuities, whereas in the previously described embodiments, the course was continuous.
- the suction roll according to the invention has a suction box with at least one sealing strip, which has a flat or substantially flat sealing surface during operation of the suction roll.
- the sealing surface shows the curvature of the invention with a curvature in the region of its axial center to the outside, that is with a convex shape , or with a curvature in the region of its axial center inwards, that is, with a concave shape.
- the expression of the curvature can be carried out according to the expected, that is the calculated or tentatively determined deflection of the suction box. If, for example, a deflection of a sealing strip holder in a suction box of 4.5 mm is expected, the sealing strip holder bearing surface, that is, the surface with which the sealing strip holder rests on the suction box, is cambered by this value (4.5 mm), so that gives a flat bearing surface during operation. Alternatively or additionally, as shown, directly the sealing surface of the sealing strip to be cambered.
- FIG. 1 shows a suction roll 1 with the rotatable, perforated roll shell 2.
- the inner surface of the roll shell 2 is acted upon over a predetermined area by means of the suction box 3 with a negative pressure.
- the suction roll 1 is wrapped, for example, by an air-permeable belt such as a sieve or a felt and a fibrous web to be drained thereon, wherein the negative pressure region formed by the stationary suction box 3 open towards the roll shell 2 adjoins the wrapping region in the interior of the roll.
- the interior of the suction box 3 is connected to a vacuum source (not shown).
- the suction box 3 adjoins the inside of the roll mantle 2 via a sealing strip 4 held by a sealing strip holder 8, that is, either the sealing strip 4 is pressed from the inside against the roll mantle 2 or held at a predetermined distance from this surface.
- the roll shell 2 rotates over the fixed shaft 10 and is mounted for this purpose by means of the bearing 9 shown on the fixed shaft 10.
- the suction box 3 has two sealing strip holder 8, each holding a sealing strip 4 in the radial direction of the roller 1 movable.
- Each sealing strip holder 8 forms with the suction box 3, a support surface 5, on which a with a pressure medium, in particular compressed air, fillable hose 6 rests, which in turn each carries a sealing strip 4 directly.
- the sealing strip 4 is moved in the direction of the inner surface of the roll shell 2, so that it rests with its sealing surface 7 inside the roll shell 2 or positioned at a predetermined distance from the inner surface of the roll shell 2. For example, a distance between one and five millimeters, in particular of three millimeters is set.
- the support surface 5 has a convex surface, that is, an outward curvature over the longitudinal axis of the suction box 3, with the highest point of the curvature centered over the Longitudinal axis of the suction box 3 is positioned, and the lowest points of the support surface 5 are respectively positioned at the two axial ends of the suction box 3.
- Both the hoses 6 and the sealing strips 4 adapt to this curvature of the bearing surface 5, so that the sealing surface 7 of each sealing strip has a correspondingly convex shape.
- FIG. 3 the support surface 5 is curved convexly over the longitudinal axis, wherein at the same time, in order to achieve a uniform distribution of stress, the sealing surface 7 of the sealing strip 4 is made convexly curved.
- the sealing strip 4 without the hose 6 and the sealing strip holder 8 is again shown in FIG. 7 immediately after its production.
- this sealing strip 4 has a concave base 11, with which it, in particular with the interposition of a tube 6, rests on the convex bearing surface 5.
- the sealing surface 7 is convex over the longitudinal axis of the sealing strip 4.
- the sealing strip 4 shown there although a convex sealing surface 7, has a flat base 11 immediately after its production.
- This base 11 can be placed either on a flat shaped support surface 5 or a convex shaped support 5, in the latter case, the sealing strip 4 bends accordingly and increases the convexity of the sealing surface 7 relative to the state shown.
- FIG. 6 shows an example of a stepped contact surface 5 of a sealing strip holder 8.
- a sealing strip 4 can be placed directly according to an embodiment.
- This sealing strip 4 may have, for example, the shape shown in FIG. 4 or the shape shown in FIG. 5, or else, for example, a shape which is rectangular in cross-section. Due to the design results either by a bend of the sealing strip 4, the desired convex shaped sealing surface 7, or the sealing strip 4 additionally or alternatively, a convex shaped base 11 on.
- a tube 6 is placed on the illustrated in Figure 6 stepped support surface 5, which in turn carries a sealing strip 4. Die Dichtolin 4 ist mit Mel Dichtring 4sky.
- the tube 6 causes the stepped bearing surface 5 is converted into a continuously curved direct bearing surface for the sealing strip 4 or "steamed".
Landscapes
- Paper (AREA)
- Making Paper Articles (AREA)
- Unwinding Webs (AREA)
- Replacement Of Web Rolls (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005059040A DE102005059040A1 (de) | 2005-12-10 | 2005-12-10 | Papiermaschinenwalze |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1795649A1 true EP1795649A1 (fr) | 2007-06-13 |
| EP1795649B1 EP1795649B1 (fr) | 2010-01-13 |
Family
ID=37696462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06122408A Not-in-force EP1795649B1 (fr) | 2005-12-10 | 2006-10-17 | Rouleau pour machine à papier |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1795649B1 (fr) |
| AT (1) | ATE455206T1 (fr) |
| DE (2) | DE102005059040A1 (fr) |
| ES (1) | ES2337715T3 (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008002035A1 (de) | 2008-05-28 | 2009-12-03 | Voith Patent Gmbh | Saugeinrichtung für eine eine Faserstoffbahn herstellende Maschine |
| CN104246068A (zh) * | 2012-05-25 | 2014-12-24 | 福伊特专利有限公司 | 密封条系统 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008041127A1 (de) | 2008-08-08 | 2010-02-11 | Voith Patent Gmbh | Dichtsystem für eine Saugwalze |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE961778C (de) | 1954-02-22 | 1957-04-11 | Millspaugh Ltd | Saugkasten fuer den Saugzylinder einer Papiermaschine |
| US2969837A (en) * | 1958-06-10 | 1961-01-31 | Layton Greenfield Inc | Suction roll construction |
| US3273492A (en) * | 1963-10-16 | 1966-09-20 | Beloit Corp | Suction roll counter-deflector |
| WO1999051812A1 (fr) | 1998-04-02 | 1999-10-14 | Valmet Corporation | Construction d'etancheite pour caisse aspirante dans un rouleau aspirant |
-
2005
- 2005-12-10 DE DE102005059040A patent/DE102005059040A1/de not_active Withdrawn
-
2006
- 2006-10-17 AT AT06122408T patent/ATE455206T1/de active
- 2006-10-17 ES ES06122408T patent/ES2337715T3/es active Active
- 2006-10-17 EP EP06122408A patent/EP1795649B1/fr not_active Not-in-force
- 2006-10-17 DE DE502006005904T patent/DE502006005904D1/de active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE961778C (de) | 1954-02-22 | 1957-04-11 | Millspaugh Ltd | Saugkasten fuer den Saugzylinder einer Papiermaschine |
| US2969837A (en) * | 1958-06-10 | 1961-01-31 | Layton Greenfield Inc | Suction roll construction |
| US3273492A (en) * | 1963-10-16 | 1966-09-20 | Beloit Corp | Suction roll counter-deflector |
| WO1999051812A1 (fr) | 1998-04-02 | 1999-10-14 | Valmet Corporation | Construction d'etancheite pour caisse aspirante dans un rouleau aspirant |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008002035A1 (de) | 2008-05-28 | 2009-12-03 | Voith Patent Gmbh | Saugeinrichtung für eine eine Faserstoffbahn herstellende Maschine |
| CN104246068A (zh) * | 2012-05-25 | 2014-12-24 | 福伊特专利有限公司 | 密封条系统 |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE455206T1 (de) | 2010-01-15 |
| EP1795649B1 (fr) | 2010-01-13 |
| ES2337715T3 (es) | 2010-04-28 |
| DE502006005904D1 (de) | 2010-03-04 |
| DE102005059040A1 (de) | 2007-06-14 |
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