EP4581206A1 - Walze und pressvorrichtung - Google Patents
Walze und pressvorrichtungInfo
- Publication number
- EP4581206A1 EP4581206A1 EP23750609.2A EP23750609A EP4581206A1 EP 4581206 A1 EP4581206 A1 EP 4581206A1 EP 23750609 A EP23750609 A EP 23750609A EP 4581206 A1 EP4581206 A1 EP 4581206A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- jacket
- drive flange
- support elements
- pressing device
- 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
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/02—Rolls; Their bearings
- D21G1/0206—Controlled deflection rolls
- D21G1/0213—Controlled deflection rolls with deflection compensation means acting between the roller shell and its supporting member
-
- 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
-
- 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
- D21F5/18—Drying webs by hot air
- D21F5/181—Drying webs by hot air on Yankee cylinder
Definitions
- the invention relates to a roller for treating a material web according to the preamble of claim 1 and a pressing device for a material web according to the preamble of claim 13.
- treatment nips When producing material webs, such as textile webs, plastic films, metal webs and in particular fibrous webs such as paper webs, the material web is often guided through so-called treatment nips in order, for example, to smooth, dewater or compress the webs.
- treatment nips are usually formed from a roller and a counter element - often a counter roller.
- a bending compensation roll includes a rotatable roll shell and internal hydraulic support elements in order to exert pressure on the roll shell from the inside and thereby influence the roll profile and, as a consequence, the nip profile.
- Such bending compensation rolls are known in a variety of designs, materials and for various applications, and are described, for example, in the documents EP1760194 B1 or EP 0 720 698.
- MG machine glazed
- the paper web is guided over a large, steam-heated glazing cylinder, a so-called MG or Yankee cylinder
- the systems generally include a treatment nip, which is formed by the Yankee cylinder and a bending compensation roll.
- a corresponding machine is described in the applicant's document EP 3 974 576.
- the use on the MG cylinder is particularly critical as it deforms very differently depending on the steam temperature.
- steel cylinders are used, which are hard-coated to prevent corrosion. Therefore, re-grinding the contour of the MG cylinder is very difficult or not possible at all.
- the compensation of the deformations and thus the leveling of the treatment nip must therefore only be done via the bending compensation roller.
- classic bending compensation rolls with a metallic jacket cannot compensate for deformations in this wide range.
- EP 3 974 576 suggests using bending adjustment rollers with a plastic jacket.
- a plastic jacket is more flexible than a steel or cast jacket and can therefore adapt better to the changing contour of the MG cylinder.
- the object of the invention is to further develop the prior art so that the rollers can be operated in a stable manner over the long term.
- roller for treating a material web, with a rotatable jacket, the roller having a plurality of has hydrostatic support elements which can exert a force on the inner circumference of the jacket, the support elements being supported on a non-rotating axis passing through the jacket.
- a drive flange is provided on at least one, in particular both end faces of the roller in order to transmit drive power to the jacket.
- the jacket is made of plastic material, while the drive flange or flanges are made of a metallic material, in particular steel.
- connection of the jacket to the drive flange is realized entirely or partially via an adhesive connection.
- Such a roller is a bending adjustment roller.
- roller shells are usually screwed to the drive flange. This is also possible without any problems with the classic bending adjustment rollers made of steel or cast iron. However, the performance of a hydraulically supported bending compensation roll is very high, especially at high speeds. This would result in a screw connection between the metal drive flanges and the plastic casing causing the casing to become damaged over time.
- an adhesive connection is therefore provided to connect the casing to the drive flange.
- the adhesive connection makes it possible to connect the drive flange to the casing over the entire area, instead of only at specific points at the screw points, as is the case with screw connections. This results in a more even load on the jacket during power transmission, which means that damage to the jacket can be completely or largely avoided.
- the adhesive surface of the adhesive connection is relatively large and evenly distributed over the circumference of the jacket or the drive flange. It is particularly advantageous if the adhesive surface extends around the entire circumference. This can be realized in the form of a closed ring or in the form of one or more spirals.
- the adhesive surface extends over at least 30mm, in particular at least 40mm, in the longitudinal direction of the roller.
- the drive flange can have a receptacle, for example a slot-shaped receptacle, into which the jacket is inserted.
- the adhesive surface or surfaces can then be located inside this receptacle.
- further connecting means such as connecting pins or securing pins, are provided which mechanically connect the jacket to the flange.
- connecting pins or securing pins are provided which mechanically connect the jacket to the flange.
- This can be advantageous, for example, to fix the jacket in the correct place while the adhesive is drying, or if this is required by law as a safety measure, for example.
- such pins do not lead to the damage to the jacket known from screw connections, since the power continues to be transmitted entirely or predominantly via the adhesive connection.
- the number of locking pins will be small, no more than 4, 8 or 12.
- Suitable materials for the connecting means are, for example, metals, plastics or combinations thereof.
- Epoxy resin adhesives have proven to be very suitable as adhesives, such as those sold under the product name Araldite ®.
- the optimal selection of the adhesive depends on factors such as the specific material combination of the jacket/flange, the operating conditions, etc.
- the drive flanges can be connected in a suitable manner to a drive, for example an electric motor.
- the modulus of elasticity of the jacket in the circumferential direction of the roller is larger, preferably twice as high, in particular at least five times as high, than in the longitudinal direction of the roller.
- the elastic modulus of the jacket in the longitudinal direction is a maximum of 50 GPa, preferably a maximum of 20 GPa.
- the modulus of elasticity of the jacket in the longitudinal direction is at least 5 GPa, preferably at least 10 GPa.
- the modulus of elasticity of the jacket in the longitudinal direction is in the range between 10 GPa and 20 GPa.
- a pressing device for a material web in particular a paper web
- the pressing device having a treatment nip which is formed by a roller and a counter roller. It is provided that the roller is designed according to one aspect of the invention.
- Figure 1 shows a section of a roller 1 with a jacket 2, which is designed to be rotatable about an axis 4 passing through the jacket 2.
- the axis 4 itself cannot be rotated.
- the rotation of the jacket 2 can occur via known bearings 11, for example ball bearings 11 or rolling bearings.
- a plurality of hydraulic support elements 3 are supported on the fixed axis 4. These can exert a force on the inner circumference of the jacket. This exertion of force leads to a deformation of the jacket 2, which means that the roller profile can be adjusted in a targeted manner.
- the support elements 3 are here expediently arranged along a row, the distance A between two adjacent support elements 3 advantageously being less than 5mm, in particular between 1mm and 2mm. Due to the small distances A, a load drop between the support elements 3 can be largely avoided.
- the roller 1 also has a drive flange 5.
- This drive flange 5 accommodates the casing 2 and transmits the power of an external drive (not shown in the figure) to the casing 2.
- connection of the jacket 2 to the drive flange 5 is realized here via an adhesive connection.
- An adhesive is applied to an adhesive surface 6.
- the adhesive connection makes it possible to connect the drive flange 5 to the casing 3 flatly, instead of only at specific points at the screw points, as is the case with screw connections. This results in a more even load on the casing 2 during power transmission, whereby damage to the casing 2 can be completely or largely avoided.
- the drive flange 5 can, for example, as shown in Figure 1, have a receptacle, preferably a slot-shaped receptacle, into which the jacket 2 is inserted.
- the adhesive surface 6 or adhesive surfaces 6, 6a can then be located inside this receptacle.
- the adhesive surface 6 of the adhesive connection is relatively large and evenly distributed over the circumference of the jacket 2 or the drive flange 5.
- the adhesive surface 6 extends around the entire circumference. This can be realized in the form of a closed ring or in the form of one or more spirals.
- the roller 1 can be designed analogously on the opposite driver or drive side, in particular with regard to the holder of the jacket 2 in the corresponding drive flange 5.
- Figures 2a and 2b show alternative implementations of the connection between drive flange 5 and casing 2 and correspond approximately to the region within the dashed circle of Figure 1.
- an additional locking pin 7 is provided. This is inserted into a hole through the drive flange 5 and the jacket 2.
- the locking pin 7 is located in the area of the adhesive surface 6.
- the locking pin 7 can also be glued in order to ensure a tight fit in the bore.
- Figure 2 b shows an embodiment in which a second adhesive surface 6a is provided. This second adhesive surface 6a can be provided in combination with a locking pin 7 as in Figure 2b, or alternatively.
- FIG. 3 shows a pressing device 10 according to a further aspect of the invention.
- the pressing device includes a roller 1 according to one aspect of the invention.
- a Yankee cylinder 8 is shown here as the counter roller 8.
- Roller 1 and Yankee cylinder 8 form the treatment nip 9 for the material web 9, in particular a paper web 9.
- the Yankee cylinder 8 is a heated cylinder - usually with steam - for example a steel cylinder, the cylinder has a surface that often has a hard metal surface.
- Material includes or consists of, in particular a tungsten carbide-cobalt hard metal or a cermet material.
- the Yankee cylinder 8 Due to the size of the Yankee cylinder 8, which can have a diameter of 3m - 8m, and the filling with steam, the effect of inflating the cylinder 8 occurs. While the surface remains fixed on the front covers, it bulges in the middle part Outside. This is indicated in Figure 3 - greatly exaggerated. Furthermore (not shown here), the Yankee cylinder 8 is subject to thermal deformation, which leads to increased diameters, especially in the edge areas, which would lead to severe edge overloads without bending compensation of the counter roller. In particular with Yankee cylinders 8 with a hard metal coating, this deformation cannot be regularly corrected when the operating parameters change by grinding the Yankee cylinder 8 accordingly. Therefore, the treatment nip 20 must be balanced via the bending adjustment roller 1.
Landscapes
- Rolls And Other Rotary Bodies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022121998.4A DE102022121998A1 (de) | 2022-08-31 | 2022-08-31 | Walze und Pressvorrichtung |
| PCT/EP2023/071030 WO2024046673A1 (de) | 2022-08-31 | 2023-07-28 | Walze und pressvorrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4581206A1 true EP4581206A1 (de) | 2025-07-09 |
| EP4581206B1 EP4581206B1 (de) | 2025-10-29 |
Family
ID=87555156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23750609.2A Active EP4581206B1 (de) | 2022-08-31 | 2023-07-28 | Walze und pressvorrichtung |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4581206B1 (de) |
| DE (1) | DE102022121998A1 (de) |
| FI (1) | FI4581206T3 (de) |
| WO (1) | WO2024046673A1 (de) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI50364C (fi) * | 1971-01-19 | 1976-02-10 | Tampella Oy Ab | Puristustela |
| DE9314568U1 (de) | 1993-09-27 | 1995-02-02 | Eduard Küsters Maschinenfabrik GmbH & Co KG, 47805 Krefeld | Walze |
| DE4340724A1 (de) * | 1993-11-30 | 1995-06-01 | Sigri Great Lakes Carbon Gmbh | Mit Fasern verstärkte Kunststoffwalze mit Rautierung |
| DE102005040868A1 (de) | 2005-08-29 | 2007-03-08 | Voith Patent Gmbh | Biegeeinstellwalze |
| JP4721896B2 (ja) * | 2005-12-27 | 2011-07-13 | 東芝機械株式会社 | シート・フィルム成形ロールおよびシート・フィルム成形ロールのクラウニング制御方法およびシート・フィルム成形装置 |
| DE102007018475A1 (de) * | 2007-04-19 | 2008-10-23 | Voith Patent Gmbh | Walze für Papiermaschine |
| DE102015212399A1 (de) * | 2015-07-02 | 2017-01-05 | Voith Patent Gmbh | Bauteil für eine Maschine zur Herstellung und/oder Behandlung einer Faserstoffbahn |
| CN113167027B (zh) * | 2018-12-04 | 2023-08-29 | 安德里茨库斯特斯有限责任公司 | 辊子及辊子的制造方法 |
| DE102020125395A1 (de) | 2020-09-29 | 2022-03-31 | Voith Patent Gmbh | Maschine und Verfahren zur Herstellung einer Faserstoffbahn |
-
2022
- 2022-08-31 DE DE102022121998.4A patent/DE102022121998A1/de active Pending
-
2023
- 2023-07-28 WO PCT/EP2023/071030 patent/WO2024046673A1/de not_active Ceased
- 2023-07-28 EP EP23750609.2A patent/EP4581206B1/de active Active
- 2023-07-28 FI FIEP23750609.2T patent/FI4581206T3/fi active
Also Published As
| Publication number | Publication date |
|---|---|
| EP4581206B1 (de) | 2025-10-29 |
| DE102022121998A1 (de) | 2024-02-29 |
| FI4581206T3 (fi) | 2026-01-30 |
| WO2024046673A1 (de) | 2024-03-07 |
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