EP0821100A2 - Pressvorrichtung - Google Patents
Pressvorrichtung Download PDFInfo
- Publication number
- EP0821100A2 EP0821100A2 EP97107862A EP97107862A EP0821100A2 EP 0821100 A2 EP0821100 A2 EP 0821100A2 EP 97107862 A EP97107862 A EP 97107862A EP 97107862 A EP97107862 A EP 97107862A EP 0821100 A2 EP0821100 A2 EP 0821100A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- press
- shoe
- jacket
- inclination
- roll
- 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.)
- Ceased
Links
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000001419 dependent effect Effects 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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
- D21F3/0209—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
-
- 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
Definitions
- the invention relates to a pressing device for treatment a material web, in particular a paper web, with a Shoe press roll, which is a flexible, tubular press jacket has, which is rotatable at its axial ends stored tensioning discs is connected and via a press shoe arrangement forming a press nip against one Counter element can be pressed, the press shoe arrangement on one axially penetrating the press jacket and the tensioning disk bearing supporting carrier is supported.
- a Shoe press roll which is a flexible, tubular press jacket has, which is rotatable at its axial ends stored tensioning discs is connected and via a press shoe arrangement forming a press nip against one Counter element can be pressed, the press shoe arrangement on one axially penetrating the press jacket and the tensioning disk bearing supporting carrier is supported.
- the clamping washers in substantially perpendicular to the press jacket axis standing levels. If during the pressing operation the carrier due to the force exerted by the counter element deflects, the tension discs are inclined in opposite directions, that it tapers in the direction of the press nip Form press jacket holder. This is the one with the Spring washers connected press jacket in the area of the press nip axially compressed and on the side facing away from the press nip Side stretched in the axial direction. Especially in In this way, wrinkles are formed around the edge of the press jacket in the compressed area and overstretching in the stretched area Area. The material of the rotating press jacket is consequently constantly alternating opposite directions Exposed to stresses that increase the life of the press jacket shortening fatigue of the press jacket material. There is also a risk that the crimp of the press jacket impairs the proper handling of the web.
- An object of the invention is a press device to create a web of material whose Press jacket has the longest possible service life.
- the inclination according to the invention of at least one of the spring washers has the consequence that during the pressing operation with load-dependent bent carrier, the inclination of the spring washers with respect to the press nip is less than in the unloaded Condition not inclined washers would be the case i.e. the tension discs are in the operating state of the Press out of their tilt at rest, which results has that the axial load on the press jacket over the entire Scope is equalized and thus the lifespan of the press jacket impairing stresses be reduced.
- Press device is the inclination of the spring washers in the unloaded Condition of the shoe press roller selected such that the Spring washers at nominal load essentially in relation to each other parallel planes.
- the press jacket is thus at a deflection caused by the nominal load the carrier no disturbing axial upsets or Stretching exposed. Consequently, during the vast majority, part of the press operation taking place at the nominal load none to shorten the normal press jacket life leading forces effective.
- is by the invention is flawless, not by creasing the Press jacket impaired treatment of the material web guaranteed.
- trained pressing device are the clamping washers rotatably supported on bearing sleeves supported on the carrier.
- Pressing device are the clamping disks on the bearing sleeves arranged immovable in the axial direction.
- tension of the press casing thus only the clamping washers bearing sleeves need to be moved axially, is the provision of complicated spring washer bearings that at the same time the rotation of the tension discs as well as their Must be able to move in the axial direction Press device of the invention is not required.
- the shoe press roll according to FIG. 1 comprises a flexible, tubular press jacket 6 which at its axial ends is connected to spring washers 13, 14.
- the press jacket 6 In the illustrated Embodiment is the press jacket 6 at the edge of the Spring washers 13, 14 attached.
- the support of the shoe press roll on a machine frame is schematic in Figure 1 indicated by arrows 2 and 3.
- the clamping disks 13, 14 on the bearing sleeves are preferred 11, 12 arranged immovably in the axial direction, while the bearing sleeves 11, 12 on the support pin 9, 10 of the Carrier 1 for tensioning the press jacket 6 are axially displaced can.
- the bearing sleeves 11, 12 are preferably on their support pin 9, 10 each arranged non-rotatably.
- the press jacket 6 is through one over the entire axial Length of the carrier 1 extending, formed in one or more parts Support arrangement can be pressed against a counter element 16, formed according to the embodiment of Figure 1 roller-shaped is.
- the support arrangement preferably comprises a continuous one Press shoe 5 and a variety of in the axial direction support elements 4 arranged one behind the other, in particular as hydraulically and / or pneumatically operated Piston / cylinder arrangements are formed.
- a Press nip 15 formed by the during the press operation a press felt 8 together with a material web, not shown is passed through.
- Circumferential surfaces 11a, 12a of the bearing sleeves 11, 12 extend each obliquely to the press jacket axis 1a such that the mounted vertically on these oblique peripheral surfaces
- Spring washers 13, 14 outside of the press operation when from Counter element 16 no force exerted on the shoe press roll is and the carrier 1 does not experience any deflection, in opposite directions are inclined and form a press jacket holder that widens in the direction of the press nip 15.
- the press jacket 6 is consequently in the area of the press nip 15 a greater axial tension than on his from the press nip 15 opposite side when axial clamping forces on the sleeves 11, 12 act.
- FIG. 2 shows the arrangement of FIG. 1 during the press operation at the maximum force F max exerted by the counter element 16 on the shoe press roll.
- FIG. 2 shows the material web 7 which is passed through the press nip 15 together with the press felt 8 for treatment by the press device according to the invention.
- the press shoe 5 can be controlled via a plurality of individually Support elements 4 acted upon so that the press shoe 5 regardless of the load from the counter roller 16 forms a flat press nip 15 with this counter-roller 16 and only the beam 1 is bent.
- the beam deflection has the consequence that the tension discs 14, 15 from their incline in the unloaded state become, i.e. their tendency is reduced.
- the tensioning disc inclination that occurs at maximum load is both of the size of the beam deflection also from the inclination of the clamping washers 13, 14 in the unloaded Condition of the shoe press roller dependent and can consequently by suitable adjustment of the invention, without load existing tensioning disc inclination can be influenced.
- the inclination of the spring washers 13, 14 in the unloaded state the shoe press roll is preferably less than each opposite slope under maximum load and is preferably one sixth to half the maximum load inclination.
- the dash-dotted lines 17, 18 in FIG. 2 indicate that Inclination on which the clamping washers 13, 14 in the illustrated Embodiment would take if in unloaded condition not inclined according to the invention, but essentially perpendicular to the axis of the undeflected Carrier 1 would stand. Accordingly, the invention Inclination of the spring washers 13, 14 to the effect that the occurring at maximum load on the shoe press roll axial compression and extension of the press jacket 6 clearly is reduced.
- the tensioning disc inclination according to the invention can be chosen in this way be that at nominal load on the shoe press roll during the majority of the pressing operation occurs and a certain beam deflection results in the clamping washers 13, 14 in substantially parallel to each other Levels.
- the press jacket 6 is then in the axial direction over its entire scope an essentially uniform, exposed to the clamping force generated by the clamping disks 13, 14, so that wrinkles and overstretching of the press jacket 6 leading axial upsets and stretchings at the normal press operation does not occur.
- the invention thus allows unwanted axial Stresses of the press jacket 6 caused by the beam deflection are caused, reduce or - at least in normal press operation - even completely avoid, which the Press sleeve life is extended significantly.
Landscapes
- Paper (AREA)
Abstract
Description
- Figur 1
- eine schematische Seitenansicht einer Ausführungsform einer unbelasteten Schuhpreßwalze und eines Gegenelementes einer erfindungsgemäßen Preßvorrichtung, und
- Figur 2
- die Schuhpreßwalze von Figur 1 bei maximaler Belastung durch das Gegenelement.
- 1
- Träger
- 1a
- Träger- bzw. Preßmantelachse
- 2, 3
- Abstützungen
- 4
- Stützelemente
- 5
- Preßschuh
- 6
- Preßmantel
- 7
- Materialbahn
- 8
- Preßfilz
- 9, 10
- Stützzapfen
- 11, 12
- Lagerhülsen
- 11a, 12a
- Umfangsflächen der Lagerhülsen
- 13, 14
- Spannscheiben
- 15
- Preßspalt
- 16
- Gegenelement
- 17, 18
- Spannscheibenneigung, die ohne erfindungsgemäße Vorneigung auftreten würde
Claims (13)
- Preßvorrichtung zur Behandlung einer Materialbahn (7), insbesondere einer Papierbahn, mit einer Schuhpreßwalze, die einen flexiblen, schlauchförmigen Preßmantel (6) aufweist, der an seinen axialen Enden mit drehbar gelagerten Spannscheiben (13, 14) verbunden ist und über eine Preßschuhanordnung (4, 5) unter Ausbildung eines Preßspaltes (15) gegen ein Gegenelement (16) preßbar ist, wobei die Preßschuhanordnung (4, 5) auf einem den Preßmantel (6) axial durchsetzenden und die Spannscheibenlager tragenden Träger (2) abgestützt ist,
dadurch gekennzeichnet,
daß die Spannscheiben (13, 14) im unbelasteten Zustand der Schuhpreßwalze gegensinnig geneigt angeordnet sind und eine sich in Richtung des Preßspaltes (15) erweiternde Preßmantelhalterung bilden. - Preßvorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Neigung der Spannscheiben (13, 14) im unbelasteten Zustand der Schuhpreßwalze geringer ist als deren jeweils entgegengesetzte Neigung bei maximaler Belastung der Schuhpreßwalze. - Preßvorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß die Neigung der Spannscheiben (13, 14) im unbelasteten Zustand der Schuhpreßwalze etwa 1/6 bis 1/2 der Neigung unter Maximallast beträgt. - Preßvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Spannscheiben (13, 14) bei Nennbelastung der Schuhpreßwalze in im wesentlichen zueinander parallelen Ebenen liegen. - Preßvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Spannscheiben (13, 14) auf am Träger (1) abgestützten Lagerhülsen (11, 12) drehbar gelagert sind. - Preßvorrichtung nach Anspruch 5,
dadurch gekennzeichnet,
daß die als Lager für die jeweilige Spannscheibe (13, 14) dienende Umfangsfläche jeder Lagerhülse (11, 12) entsprechend der Neigung der jeweiligen Spannscheibe (13, 14) schräg zur Preßmantelachse verläuft. - Preßvorrichtung nach Anspruch 5 oder 6,
dadurch gekennzeichnet,
daß die Spannscheiben (13, 14) auf den Lagerhülsen (11, 12) in axialer Richtung unverschiebbar sind. - Preßvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Lagerhülsen (11, 12) jeweils auf sich in axialer Richtung erstreckenden Stützzapfen (9, 10) des Trägers (1) angeordnet sind. - Preßvorrichtung nach Anspruch 8,
dadurch gekennzeichnet,
daß die Lagerhülsen (11, 12) auf den Stützzapfen (9, 10) in axialer Richtung verschiebbar und bevorzugt unverdrehbar sind. - Preßvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Preßschuhanordnung (4, 5) wenigstens einen mit dem Preßmantel (6) zusammenwirkenden Preßschuh (5) und eine den Preßschuh (5) am Träger (1) abstützende, mehrere individuell ansteuerbare Stützelemente (4) aufweisende Stützeinrichtung umfaßt. - Preßvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß als Gegenelement (16) eine Gegenwalze vorgesehen ist. - Preßvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Neigung der Spannscheiben (13, 14) in Abhängigkeit von der während des Preßbetriebs zu erwartenden Belastung der Schuhpreßwalze einstellbar ist. - Preßvorrichtung, insbesondere nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß nur eine der Spannscheiben (13, 14) im unbelasteten Zustand der Schuhpreßwalze zur Trägerachse geneigt angeordnet ist und preßspaltseitig mit der Trägerachse einen leicht stumpfen Winkel bildet.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19629885A DE19629885A1 (de) | 1996-07-24 | 1996-07-24 | Preßvorrichtung |
DE19629885 | 1996-07-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0821100A2 true EP0821100A2 (de) | 1998-01-28 |
EP0821100A3 EP0821100A3 (de) | 1999-01-20 |
Family
ID=7800717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97107862A Ceased EP0821100A3 (de) | 1996-07-24 | 1997-05-14 | Pressvorrichtung |
Country Status (5)
Country | Link |
---|---|
US (1) | US5843280A (de) |
EP (1) | EP0821100A3 (de) |
JP (1) | JPH1088492A (de) |
CA (1) | CA2211295A1 (de) |
DE (1) | DE19629885A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19615226A1 (de) * | 1996-04-18 | 1997-10-23 | Voith Sulzer Papiermasch Gmbh | Trockenpartie |
US6868351B1 (en) * | 1999-10-19 | 2005-03-15 | The Minster Machine Company | Displacement based dynamic load monitor |
DE102012205187A1 (de) | 2012-03-30 | 2013-10-02 | Voith Patent Gmbh | Presswalze für eine Maschine zur Herstellung einer Faserstoffbahn |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3311998A1 (de) * | 1983-04-02 | 1984-10-04 | J.M. Voith Gmbh, 7920 Heidenheim | Bandpresseinheit, vorzugsweise als nasspresse einer papiermaschine |
EP0442257B1 (de) * | 1990-01-16 | 1995-05-03 | Valmet Paper Machinery Inc. | Presswalze |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3338487A1 (de) * | 1983-10-22 | 1985-05-02 | Sulzer-Escher Wyss GmbH, 7980 Ravensburg | Presswalze |
DE3607941A1 (de) * | 1985-10-30 | 1987-05-07 | Escher Wyss Gmbh | Presseinrichtung zum entwaessern einer warenbahn |
US4975152A (en) * | 1989-07-06 | 1990-12-04 | Beloit Corporation | Enclosed extended nip press apparatus with inflatable seals and barbs |
SE464922B (sv) * | 1990-05-08 | 1991-07-01 | Valmet Paper Machinery Inc | Pressvals |
DE4413544C2 (de) * | 1994-04-19 | 1999-08-12 | Voith Sulzer Papiermasch Gmbh | Preßvorrichtung |
US5643416A (en) * | 1996-06-07 | 1997-07-01 | Beloit Technologies, Inc. | Extended nip press with oscillating blanket for extended wear |
-
1996
- 1996-07-24 DE DE19629885A patent/DE19629885A1/de not_active Withdrawn
-
1997
- 1997-05-14 EP EP97107862A patent/EP0821100A3/de not_active Ceased
- 1997-07-15 US US08/892,058 patent/US5843280A/en not_active Expired - Fee Related
- 1997-07-23 CA CA002211295A patent/CA2211295A1/en not_active Abandoned
- 1997-07-24 JP JP9198147A patent/JPH1088492A/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3311998A1 (de) * | 1983-04-02 | 1984-10-04 | J.M. Voith Gmbh, 7920 Heidenheim | Bandpresseinheit, vorzugsweise als nasspresse einer papiermaschine |
EP0442257B1 (de) * | 1990-01-16 | 1995-05-03 | Valmet Paper Machinery Inc. | Presswalze |
Also Published As
Publication number | Publication date |
---|---|
US5843280A (en) | 1998-12-01 |
DE19629885A1 (de) | 1998-01-29 |
EP0821100A3 (de) | 1999-01-20 |
JPH1088492A (ja) | 1998-04-07 |
CA2211295A1 (en) | 1998-01-24 |
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Legal Events
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Effective date: 19990720 |
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