EP0373253A1 - Dispositif de neutralisation de charges en porte à faux - Google Patents

Dispositif de neutralisation de charges en porte à faux Download PDF

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Publication number
EP0373253A1
EP0373253A1 EP88121069A EP88121069A EP0373253A1 EP 0373253 A1 EP0373253 A1 EP 0373253A1 EP 88121069 A EP88121069 A EP 88121069A EP 88121069 A EP88121069 A EP 88121069A EP 0373253 A1 EP0373253 A1 EP 0373253A1
Authority
EP
European Patent Office
Prior art keywords
force
calender
roller
stand
cylinder
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Withdrawn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
EP88121069A
Other languages
German (de)
English (en)
Inventor
Mario Dipl.-Ing. Biondetti
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.)
Sulzer Escher Wyss GmbH
Original Assignee
Sulzer Escher Wyss GmbH
Escher Wyss 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 Sulzer Escher Wyss GmbH, Escher Wyss GmbH filed Critical Sulzer Escher Wyss GmbH
Priority to FI890572A priority Critical patent/FI890572A/fi
Priority to JP8715489A priority patent/JPH02175991A/ja
Publication of EP0373253A1 publication Critical patent/EP0373253A1/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Withdrawn legal-status Critical Current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
    • D21G1/002—Opening or closing mechanisms; Regulating the pressure

Definitions

  • the invention relates to the device according to the preamble of claim 1.
  • a calender of the type has a number of intermediate rolls which are arranged between an upper and a lower roll.
  • the rollers of the calender are pressed together during operation by lifting the lower roller.
  • the calender is opened, the rollers falling into predetermined lowering positions due to their own weight, a distance being created between them. This must e.g. happen very quickly in the event of a malfunction.
  • the working pressure in the individual gaps between the rollers results from the sum of the forces with which the individual rollers act against the lower roller from top to bottom.
  • the so-called overhang loads have a deforming effect on the axes of the intermediate rolls: the weight of the sections of the rollers on both sides of the material web to be processed, the pins of the rollers and their bearings, the guide rollers, finger guards, etc. which may be attached there. These weights can be up to over 15 kN on each side. The deforming effect of these overhang loads is essentially prevented by acting against it with the appropriate force.
  • support devices mostly hydraulic cylinder / piston units, with which the corresponding force is set and held, are known.
  • the medium filled into the cylinder must be released with a switching operation.
  • the respective path of the rollers into the lowered position can be given by the amount of the medium that has been let out, but a stop can also serve to limit the path.
  • the object is achieved by the measures specified in the characterizing part of the claim.
  • a damping device can be attached to avoid vibrations.
  • a roller 1 of a calender to be opened down is between a lower one 12 and an upper roller 13 and is mounted with its axis 2 in a support lever 3.
  • this is pivoted at the pivot point 4 on the stand (not shown) of the calender or on a displaceable support (not shown).
  • the device 5 is also supported on the stand or on the support. It presses from below on the support lever 3 in the required position of the intermediate roller 1 at point 6, which is as close as possible to the axis 2 with a force K 'which is so great that, for example, the overhang loads are compensated for via the lever law that act downwards on the axis 2, as indicated by arrows K in FIG.
  • the force K 'in the device is generated by a compressible or displaceable or deformable or displaceable or compressible means, or. set.
  • the force for neutralizing the overhang loads is generated there by means of a pendulum bar 7 which is arranged horizontally. This presses on the support lever 3 at point 6 with a force K ', which neutralizes the overhang loads and is generated by a weight 8 attached to the other side of the lever beam 7. If the lower roller 12 falls down when the calender is opened, the force K + overcomes the set force K 'of the device 5 and pushes the part of the lever arm 7 which presses onto the point 6 downwards, the other part of the lever arm 7 rising upwards until it comes to rest on the stop buffer 9. The roller 1 is now in a certain lowering position. Of course, the stop can also be arranged directly on the chair.
  • a separate as well as a common height adjustment for a device 5 and for a support lever 3 is known.
  • the device 5 has a spring assembly 12, which preferably has a linear spring characteristic. It is conceivable that when lowering the package from a height 13 to a height 14 is compressed. In this case, a stop to limit the lowering path could be omitted, since the displacement path of the spring assembly 12 already results in the lowering path due to the total weight of the roller including additional loads. However, this stroke limitation by the spring assembly itself is an exception. In general, a separate stop will have to be provided.
  • a rubber buffer 16 in the device 5 is shown in FIG.
  • the device 5 is adjustable in height by means of a screw 17 relative to its support 18, but this also makes the force K 'adjustable.
  • a set screw such as 17 is also useful for the device with the spring assembly 12 and air spring 15.
  • the force generating means is a liquid column 19 which is supported by a compressible gas cushion 20.
  • a throttle device 21 could also be used on the path 22 of the liquid in order to dampen any vibrations that may occur. It is important to know that the set relief force need not be adjusted in the device according to the invention, so that when the calender is closed, i.e. when lifting the roller 1 back into the working position, the force does not have to be readjusted.
  • both of the support of the device 5, and of the pivot point 4 of the support lever 3 is important where the intermediate rollers change their diameter during operation due to wear, and the worn ones are replaced by new, possibly reworked, regrinded ones.
  • the distance of the carrying lever 3 to the device 5 also changes, and the set force K 'for neutralizing the overhang loads no longer corresponds to the new spatial situation. If the device 5, as well as the fulcrum 4 of the carrying lever 3 are arranged on a common carriage (not shown) which is adjustable in height along the stand of the calender, then the force K 'set in the device 5 can remain the same after this height adjustment.
  • overhang loads on both sides of such a narrow material web are namely greater by the weight of the roll body parts between the web edge and the respective roll end.
  • the suspension 3 has the shape of a two-armed lever, on the second arm of which a weight 8 is attached behind the pivot point 4.

Landscapes

  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Paper (AREA)
EP88121069A 1987-10-17 1988-12-16 Dispositif de neutralisation de charges en porte à faux Withdrawn EP0373253A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI890572A FI890572A (fi) 1988-12-16 1989-02-07 Anordning foer neutralisering av oeverhaengande laster.
JP8715489A JPH02175991A (ja) 1988-12-16 1989-04-07 オーバハング荷重を相殺する装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873735243 DE3735243A1 (de) 1987-10-17 1987-10-17 Vorrichtung zum neutralisieren von ueberhanglasten

Publications (1)

Publication Number Publication Date
EP0373253A1 true EP0373253A1 (fr) 1990-06-20

Family

ID=6338573

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88121069A Withdrawn EP0373253A1 (fr) 1987-10-17 1988-12-16 Dispositif de neutralisation de charges en porte à faux

Country Status (3)

Country Link
US (1) US5022319A (fr)
EP (1) EP0373253A1 (fr)
DE (1) DE3735243A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19652769A1 (de) * 1996-12-18 1998-06-25 Voith Sulzer Papiermasch Gmbh Verfahren und Vorrichtung zur Dämpfung von Kontaktschwingungen
FI104207B (fi) * 1998-07-24 1999-11-30 Valmet Corp Menetelmä ja laite paperi- tai kartonkikoneen nippitelarakenteen ominaistaajuuden muuttamiseksi
SE9901092L (sv) * 1999-03-25 2000-09-26 Valmet Karlstad Ab Upphängningsanordning för en vals
ATE462833T1 (de) * 2002-02-01 2010-04-15 Koenig & Bauer Ag Verfahren zur verminderung von schwingungen an rotierenden bauteilen einer bearbeitungsmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE345647C (de) * 1920-11-19 1921-12-16 Aeg Einrichtung zur Steuerung der Gewichtsbelastung an Kalandern, Druckmaschinen, Rollern oder aehnlichen Arbeitsmaschinen
DE1052799B (de) * 1955-09-20 1959-03-12 Steinmesse & Stollberg K G Vorrichtung zum Anstellen der Gegendruckwalze an die Glaettwalze von Kalandern
DE1150272B (de) * 1959-05-29 1963-06-12 Voith Gmbh J M Glaettwerk fuer Papierbahnen od. dgl.
US3158088A (en) * 1963-07-11 1964-11-24 Beloit Corp Calender nip control device
US3525301A (en) * 1968-11-08 1970-08-25 Beloit Corp Calender stack
DE2101374A1 (en) * 1971-01-13 1972-08-10 Maschinenfabrik Zum Bruderhaus Gmbh, 7410 Reutlingen Paper web calender - controlling lifting of calender cylinders by stress relieving journals subject to wt of auxiliaries

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE234048C (fr) *
DE557242C (de) * 1930-10-12 1932-08-20 Engelhardt Achenbach Sel Soehn Vorrichtung zum Senken, Heben und Gehobenhalten der Walzen von Walzwerken
DE915890C (de) * 1944-04-30 1954-07-29 Imp G M B H Maschf Anordnung fuer die Be- und Entlastung der Walze einer Walzenpresse, insbesondere zumAuspressen von flaechenfoermigen Guetern
US2474512A (en) * 1945-11-27 1949-06-28 Fluor Corp Pulsation elimination in fluid streams
US3196615A (en) * 1961-05-04 1965-07-27 Mine And Smelter Supply Co Overload release mechanisms
DE3004912C2 (de) * 1980-02-09 1982-07-08 Kleinewefers Gmbh, 4150 Krefeld Kalander
FI79875C (fi) * 1983-10-17 1990-03-12 Escher Wyss Ag Kalander.
US4510859A (en) * 1984-01-23 1985-04-16 Beloit Corporation Supercalender NIP relieving arrangement
DE3640161A1 (de) * 1985-12-23 1987-07-02 Escher Wyss Gmbh Vorrichtung zum zueinander positionieren von walzenflaechen
DE3622398C1 (en) * 1986-02-18 1987-06-19 Escher Wyss Ag Sepg. calender rolls - involves lowering pressure in hydraulic carrier support installations with time delay w.r.t. pressure to prevent damage to roll surface
DE3702245C3 (de) * 1987-01-27 1993-12-23 Kleinewefers Gmbh Kalander
DE3711334A1 (de) * 1987-04-03 1988-10-13 Escher Wyss Gmbh Vorrichtung zur fuehrung der walzen eines im wesentlichen vertikalen kalanders
DE3713561A1 (de) * 1987-04-23 1988-11-10 Escher Wyss Gmbh Kalander mit niprelieving

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE345647C (de) * 1920-11-19 1921-12-16 Aeg Einrichtung zur Steuerung der Gewichtsbelastung an Kalandern, Druckmaschinen, Rollern oder aehnlichen Arbeitsmaschinen
DE1052799B (de) * 1955-09-20 1959-03-12 Steinmesse & Stollberg K G Vorrichtung zum Anstellen der Gegendruckwalze an die Glaettwalze von Kalandern
DE1150272B (de) * 1959-05-29 1963-06-12 Voith Gmbh J M Glaettwerk fuer Papierbahnen od. dgl.
US3158088A (en) * 1963-07-11 1964-11-24 Beloit Corp Calender nip control device
US3525301A (en) * 1968-11-08 1970-08-25 Beloit Corp Calender stack
DE2101374A1 (en) * 1971-01-13 1972-08-10 Maschinenfabrik Zum Bruderhaus Gmbh, 7410 Reutlingen Paper web calender - controlling lifting of calender cylinders by stress relieving journals subject to wt of auxiliaries

Also Published As

Publication number Publication date
US5022319A (en) 1991-06-11
DE3735243A1 (de) 1989-04-27

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