EP1314816A2 - Rouleau à sabot - Google Patents

Rouleau à sabot Download PDF

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Publication number
EP1314816A2
EP1314816A2 EP02020713A EP02020713A EP1314816A2 EP 1314816 A2 EP1314816 A2 EP 1314816A2 EP 02020713 A EP02020713 A EP 02020713A EP 02020713 A EP02020713 A EP 02020713A EP 1314816 A2 EP1314816 A2 EP 1314816A2
Authority
EP
European Patent Office
Prior art keywords
shoe
press
hose
press jacket
piston
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Withdrawn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
EP02020713A
Other languages
German (de)
English (en)
Other versions
EP1314816A3 (fr
Inventor
Helmut Heinzmann
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 EP1314816A2 publication Critical patent/EP1314816A2/fr
Publication of EP1314816A3 publication Critical patent/EP1314816A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/006—Calenders; Smoothing apparatus with extended nips
    • 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
    • D21F3/0227—Belts or sleeves therefor
    • 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
    • D21F3/0227—Belts or sleeves therefor
    • D21F3/0245—Means for fixing the sleeve to the roller end

Definitions

  • the invention relates to a shoe roller for dewatering or smoothing a running Fibrous web, in particular paper or cardboard web within a machine for Production and / or finishing of the fibrous web, with a flexible, exchangeable press jacket, which at least in one of its end regions Has reinforcing inserts and the press jacket on these end regions end-side support disks can be fastened in a sealing manner and when the Press cover is releasable.
  • such a shoe roller with a counter roller forms a press nip which is elongated in the web running direction.
  • the flexible press jacket is attached to a rotatable front support disc at each roller end.
  • a stationary support body extends through the interior of the press roll, on which the support disks are mounted and which supports a radially movable hydrostatic or hydrodynamic press shoe which serves to press the press cover onto the counter roll and is therefore also referred to as a shoe press roll.
  • the interior of the roller is under pressure to improve its running behavior.
  • the flexible press jacket is made of rubber or plastic, preferably Polyurethane.
  • Such a shoe roller is known from DE 196 45 407 A1 (PH10404).
  • the front Carrying disc also referred to as a side plate
  • the rim is rotatably mounted on the stationary support body, while the hose is connected to the roll shell. That way radial support of the end regions of the roll shell with radial Compliance achieved.
  • the machines for the production and finishing of the fibrous web are in continuous operation for longer periods.
  • the cloth-like press jacket and other machine parts of such a shoe roller must therefore be replaced regularly during the planned, short downtimes because of the wear that occurs.
  • the exchange of the press cover often determines the downtime of the paper machine due to the complex assembly work.
  • the roll shell to be replaced must first be detached from the front wall.
  • the new roll shell is then to be fastened to the end-side support disks in such a way that the required sealing of the interior of the press roll from the surroundings is ensured. But also in cases where you have to get inside the roller for service purposes, the above-mentioned operations are necessary.
  • a respective end region of the press jacket is pressed against the outer end face of the relevant end wall by means of a clamping flange, for which purpose it is necessary that the end region be bent radially inwards , To make this possible, the end region is provided with a large number of incisions and remaining tabs. Adequate projections are provided in the end-side support disk, which engage in said cut-outs on the edge when the press jacket is installed.
  • the invention is therefore based on the object, a shoe roller of the beginning specified type, in which the connection, one in its end areas reinforced press jacket with the front-side support disk with regard to the Ensure a reliable seal of the interior of the roller with simple and reliable acting means can be done faster than before without to change the outer dimensions of the roller significantly.
  • the object is achieved in that a quick release is provided in such a way that between the interior of the press jacket end region and the front-side support disc a radially pressing and in its pressing force changeable element is arranged, which is also suitable, also the Sealing the interior of the shoe press roller gas-tight from the surroundings.
  • the device according to the invention is located inside the press jacket. External clamping devices can be avoided. This is the The diameter of the shoe press roll in the edge areas is essentially the same big as in the middle part.
  • the advantage here is that the shoe roller is not essential must be built wider than the counter roller to collide with Avoid tensioning elements.
  • the radial press Element is radially more flexible, and thus the concave deformation of the press jacket in the press nip between counter roller and concave shoe, also in the edge area at least partially. The deformation differences of the press jacket between the edge and the center are minimized, and the running time of the jacket extended.
  • a first variant (claims 2 to 7) is as a radially pressing element at least one inflatable pressure hose is provided which in the circumferential direction in a receiving groove of the front disc runs, he in pressurized condition tightly clamps the press jacket end area and loosens or releases the press jacket end area when the pressure is reduced.
  • the hose is constantly under pressure during the operation of the shoe press.
  • An expedient embodiment of the invention is that the Pressure hose receiving end of the end-face support disc with a Hose band is covered.
  • two pressure hoses are arranged next to one another in the axial direction around the front disk.
  • the arrangement acts like a double seal.
  • the outer hose facing the roller end and arranged in said receiving groove is located with its outer surface between the hose band and the receiving groove of the support disk, whereas the inner hose (which points in the axial direction to the middle of the roller) is located with its outer surface between the outside of the hose band and the Inner wall of the press jacket is located.
  • the said hose band covers the one hose and therefore also possible abutting edges during the assembly process of the press jacket.
  • the hose band has a first area with a smaller diameter and a second area with a larger diameter.
  • the first area surrounds the front end of the support disk in the interior of the shoe press roll and the second area surrounds or covers the pressure hose located in the receiving groove.
  • the hose band acts like a "shoehorn" when the casing is being assembled, thus making it easier to pull the press casing on and off axially.
  • This advantage is particularly effective when the second one, towards the center of the roll pointing hose is not provided.
  • the said hose band at one end with the Carrier disc is connected.
  • a practical design of the inner surface of the hose band and / or the Inner surface of the press jacket end area and the outer surface of one Pressure hose or the two pressure hoses provided can be in it exist that these are each provided with incorporated profiles.
  • the Profiling the pairing of hose band / pressure hose or the pairing Press jacket / pressure hose interlocks when pressurized, see above that in addition to the frictional connection there is also a positive connection.
  • Profiles are grooves or grooves with a circular or polygonal Cross-section that run in the direction of rotation and / or transverse to the direction of rotation, conceivable.
  • At least one piston-spring unit is provided as a radially pressing element.
  • This piston-spring unit which is in a circumferential recess in the front Disc is pressed over a pressurized by it Seal carrier a seal in the tension state against the inner wall of the End area of the press jacket.
  • Seal carrier a seal in the tension state against the inner wall of the End area of the press jacket.
  • the recess open to the outside has an extension on each side.
  • the extensions serve to hold one hose each filled with a pressure medium (for example with air) that can counteract the spring force.
  • a part of the piston (piston disc) against which the hoses are supported is also arranged in these extensions or recesses. The arrangement is such that, in contrast to the first variant described, when the hoses are pressurized, the end region of the press jacket can be detached from the end-side support disk.
  • piston-spring units with curved the diameter and the width of the recess in the front disc adapted contact surfaces of the piston or piston disc, segment-like or arranged in a star shape around the bottom of the recess.
  • pistons of the piston-spring unit as at least two-part, cylindrical part with a T-shaped cross-section and diameter and the width of the cutout of the face plate adapted contact surfaces is made.
  • the seal carrier pressed against the press jacket in the tensioned state is on its outer circumference with transverse to the circumferential direction (running direction of the jacket) radially provided incisions, which are against the Let the press jacket end area expand radially.
  • the depth of the incisions is less than the depth of the circumferential groove worked into the seal carrier.
  • the seal described above which is an O-ring or ring with a square cross section, sealing cushion or the like, admitted. Their height is larger than the depth of them receiving groove, whereby the sealing effect is achieved.
  • Conventional shoe rollers i.e. shoe press rollers to achieve a certain dryness or smoothing rollers to achieve a certain Smoothness of the fibrous web can with such an inventive Quick release can be retrofitted.
  • the present invention is particularly suitable for roller shells with a reinforced end region which could not be fitted onto a shoe roller with conventional devices.
  • a reinforced end region is described in the subsequently published DE 10138526.9, which is hereby fully explained as part of the description.
  • the edge reinforcement is so large that excessive stretching of the jacket by the radially pressing element is avoided.
  • the modulus of elasticity of the jacket in the circumferential direction should therefore be E ⁇ 45 N / mm 2 , preferably E 70 70 N / mm 2, in particular E 90 90 N / mm 2 .
  • Another advantage of the invention relates to the recovery of the jacket to be removed. While usually the press sleeves to be removed due to time constraints this labor-intensive step does not have to be cut out.
  • the Invention allows the press jacket to be safely and orderly on the assembly side (Leader side) to expand. The same device can be used as it is is used for jacket installation.
  • FIG. 1 shows a first variant of a quick release fastener or a quick connection, ie. the attachment of an end region E of the press jacket of a shoe press roll 1 with its front rotatable support disk 2.
  • the press jacket 3 is provided with reinforcements 4 in a conventional manner the reinforcement in at least one end region of the press casing compared to the middle region of the roller is reinforced with reinforcing inserts 5.
  • the end regions E are even more suitable than before for attachment to the rotatable front disks 2 (also called end covers or side shields).
  • the shape of the end region E ie its diameter changes only slightly when the radial forces are applied.
  • a conventional or simply reinforced end area would otherwise expand unintentionally. This is achieved by, among other things, an increased modulus of elasticity in the end area E.
  • This reinforcement 5, including the modulus of elasticity, is one that is described in the subsequently published DE 1013526.9, which is why further explanations of the reinforcement 5 will not be discussed further here.
  • a radially pressing element is arranged between the end region E of the press casing 3 and the support disk 2. The force of this element can be changed.
  • At least one inflatable pressure hose 6 is provided as such a radially pressing element in this first variant, shown in FIG. 1 .
  • This pressure hose 6 runs in the circumferential direction in an outwardly open groove 7 of the support disk 2.
  • the press jacket 3 Since the press jacket 3 is pushed axially onto the shoe press roll during assembly, it is particularly advantageous here that the outer diameter of the hose 6 becomes smaller when the hose pressure is reduced. This creates the necessary play between the press jacket 3, ie in its end region E, in order to facilitate assembly and disassembly.
  • Figure 1 also shows a hose band 8, which covers the hose 6 and thus also reduces possible abutting edges.
  • the device can act like a shoehorn, which of course makes it much easier to pull on the press cover 3.
  • a second inflated hose 10 that is to say in the pressure state, can be seen in the axial direction.
  • This hose 10 faces the inside of the roll WI and, as said, is arranged in the axial direction of the hose 6, which faces the end of the roll and also engages around the end-side support disk 2.
  • both hoses can function very effectively as a double seal.
  • the hose 10 facing the inside of the roll is located with its outer surface between the inner wall I of the press jacket 3 and the outer surface of the hose band 8
  • the pressure hose 6 facing the end of the roll is located with its outer surface between the inner surface of the hose band 8 and the base the receiving groove 7 of the support plate 2 is located.
  • the hose band 8 has seen in the sliding direction of the press jacket 3 (at Assembly, as arrow S shows) a first area 8a with a smaller diameter and a second area 8b with a larger diameter.
  • the first covers Area 8a is the end of the disk 2 on the end facing the roll interior WI.
  • the second area 8b covers the pressure hose 6.
  • the hose band 8 is a single striped part and is on its outer end face connected to the front support disk 2. But it is also conceivable, the band 8 with one of the two or with both Connect pressure hoses 6 and 10 at the same time.
  • the inner wall I of the end region E of the press jacket 3 in the region of the Hose 10 and / or the outer surface of the hose band 8 in the area of Hose 6 and as a complementary counterpart to the outer surfaces of the said hoses can, as Figure 4 shows, be provided with profiles.
  • the profiling can consist in providing recesses in the hose band and / or press jacket adapted to the diameter of the pressure hoses.
  • the profiling can, however, also be designed and as can also be seen in FIG. 4 , in that the grooves are sawtooth-like, both in the hose or hoses and in the hose band and / or press jacket. Creases with a circular or polygonal cross-section are also possible.
  • the interlocking profiles can be present in the circumferential direction of the press jacket and / or also transversely to the circumferential direction. As a result, when the pressure hose or pressure hoses 6 and 10 are inflated, there is also a form fit in addition to the existing frictional connection. This significantly increases the axial hold of the press casing 3 and the security against rotation and also operational safety during the transmission of force from the press casing 3 to the support disk 2.
  • FIG. 2 shows a second variant of the radial contact pressure and thus clamping of the press jacket 3 to the front support disk 2.
  • At least one piston-spring unit 12 consisting of spring 12a, piston 12b and a piston contact surface 12c is provided as the pressing element. This unit 12 is supported in a circumferential recess 13 of the front pane 2 that is open to the outside.
  • the cutout 13 has an extension 13a and 13b on each side to accommodate a relief hose 15 and 16, which counteracts the force of the spring 12a in such a way that the pressurized jacket 3 is pressed when the hoses 15 and 16 are under pressure can detach from the front disc 2.
  • connection according to FIG. 1 is technically easier to produce, it requires more energy to generate the radial force, since this is to be applied during the entire operating state.
  • the piston 12b of the piston-spring unit 12 with a T-shaped cross section is adapted to the diameter and the width of the recess 13.
  • a seal carrier 14 which can be acted upon by the piston-spring unit 12 can be in the State of tension of the spring 12a against the inner wall I of the end region E. of the press cover 3.
  • the seal carrier 14 is provided on its outer circumference (see FIG. 2 ) with incisions 14a running radially in the circumferential direction (see FIG. 3 ). As a result, the seal carrier 14 can be easily expanded radially. This can be achieved because the incisions 14b extend up to the groove base 18 at the maximum. This design improves the sealing effect.
  • This sealing element 19 is received in a groove 18 which is open to the outside and extends in the circumferential direction of the cylindrical seal carrier 14.
  • a so-called O-ring or a ring with a square cross-section or a sealing cord, sealing cushion or the like can be selected as the sealing element.
  • the height dimension of the groove 18 is chosen to be less than the dimension of the diameter of the sealing element 19.
  • Another seal 20 is located in the seal carrier 14. This is necessary to seal the interior of the shoe roller.
  • the support plate 2 is made in two parts for assembly purposes is. Between these two parts is a further seal 20 from said Reasons.

Landscapes

  • Paper (AREA)
  • Rolls And Other Rotary Bodies (AREA)
EP02020713A 2001-11-22 2002-09-14 Rouleau à sabot Withdrawn EP1314816A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10157222A DE10157222A1 (de) 2001-11-22 2001-11-22 Schuhwalze
DE10157222 2001-11-22

Publications (2)

Publication Number Publication Date
EP1314816A2 true EP1314816A2 (fr) 2003-05-28
EP1314816A3 EP1314816A3 (fr) 2003-12-17

Family

ID=7706526

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02020713A Withdrawn EP1314816A3 (fr) 2001-11-22 2002-09-14 Rouleau à sabot

Country Status (4)

Country Link
US (1) US20030094256A1 (fr)
EP (1) EP1314816A3 (fr)
JP (1) JP2003193392A (fr)
DE (1) DE10157222A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10348594A1 (de) * 2003-10-20 2005-05-19 Voith Paper Patent Gmbh Schuhwalze
DE102004025944A1 (de) * 2004-05-27 2006-01-12 Voith Paper Patent Gmbh Mantel mit Balgrand für eine Pressvorrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5700357A (en) * 1996-10-16 1997-12-23 Beloit Technologies, Inc. Mechanical blanket clamp in rotating head assembly
DE19645407A1 (de) * 1996-11-04 1998-05-07 Voith Sulzer Papiermasch Gmbh Schuhpresse
DE19703218A1 (de) * 1997-01-29 1998-07-30 Voith Sulzer Papiermasch Gmbh Preßvorrichtung, insbesondere für eine Papiermaschine
DE19703631A1 (de) * 1997-01-31 1998-08-06 Voith Sulzer Papiermasch Gmbh Preßmantel für eine Preßvorrichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3501635A1 (de) * 1985-01-19 1986-07-24 J.M. Voith Gmbh, 7920 Heidenheim Presswalze
DE29702362U1 (de) * 1996-04-29 1997-05-15 Voith Sulzer Papiermasch Gmbh Preßwalze
DE10138526A1 (de) * 2001-08-06 2003-02-20 Voith Paper Patent Gmbh Flexibler Pressmantel und Schuhpresswalze mit einem solchen flexiblen Pressmantel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5700357A (en) * 1996-10-16 1997-12-23 Beloit Technologies, Inc. Mechanical blanket clamp in rotating head assembly
DE19645407A1 (de) * 1996-11-04 1998-05-07 Voith Sulzer Papiermasch Gmbh Schuhpresse
DE19703218A1 (de) * 1997-01-29 1998-07-30 Voith Sulzer Papiermasch Gmbh Preßvorrichtung, insbesondere für eine Papiermaschine
DE19703631A1 (de) * 1997-01-31 1998-08-06 Voith Sulzer Papiermasch Gmbh Preßmantel für eine Preßvorrichtung

Also Published As

Publication number Publication date
JP2003193392A (ja) 2003-07-09
US20030094256A1 (en) 2003-05-22
EP1314816A3 (fr) 2003-12-17
DE10157222A1 (de) 2003-06-05

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