EP0777012B1 - Presswalze - Google Patents
Presswalze Download PDFInfo
- Publication number
- EP0777012B1 EP0777012B1 EP96115525A EP96115525A EP0777012B1 EP 0777012 B1 EP0777012 B1 EP 0777012B1 EP 96115525 A EP96115525 A EP 96115525A EP 96115525 A EP96115525 A EP 96115525A EP 0777012 B1 EP0777012 B1 EP 0777012B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- press roll
- roll according
- oil supply
- supply points
- row
- 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.)
- Expired - Lifetime
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/0088—Lubricating means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B3/00—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs
- B30B3/005—Roll constructions
-
- 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
- D21F3/08—Pressure rolls
Definitions
- the invention relates to a press roll with a stationary Carrier and a circumferential roller shell, which at least one against the inner peripheral surface of the roll shell compressible, at least partially hydrodynamically lubricated Support element is supported on the carrier, the one of the inner peripheral surface facing the roll shell, in the running direction of the roll shell has an extended support surface, which several Has oil supply points over the area between Support surface and inner peripheral surface of the roll shell fresh lubricating oil is supplied, the supply being fresh Lubricating oil at least partially independent of that Supporting pressure chamber takes place.
- press rolls are used in particular in press devices used with a so-called extended press zone.
- Such pressing devices can, for example, in press sections, but also used in calibration and smoothing plants Find.
- the roll shell one led through the press zone Felt tape, the web of material to be pressed or the like or the counter surface formed, for example, by a counter roller Irregularities, especially in the form of thick spots or unevenness, it must be expected that that at certain points the pressure becomes so high that there little or no more oil is added to the press zone will or will be preserved. At the relevant points it can also happen that oil is wiped off at the slot becomes.
- a press roll known from DE 40 40 392 A1 are mentioned in a in the support surface of the Support element formed, essentially over the entire Pocket extending width of the press zone several grooves provided, into which each lubricant channels open. At In one embodiment, there are three grooves in the pocket provided, two of which lie one behind the other in the direction of the roller axis. With such an arrangement it is true possible when commissioning the press arrangement for to provide hydrostatic support for the roll shell, while this is hydrodynamic at normal rotational speed is supported.
- the invention has for its object a press roll to create the type mentioned in the case of different Operating conditions always an optimal supply guaranteed with fresh cool lubricating oil and a Temperature distribution as uniform as possible over the support surface of the support element is ensured.
- the Support surface at least one in the direction of the roller axis extending row of a plurality of separate, at least partially independent of the support element pressurized pressure chamber fed oil supply points has, each comprising a bore in the area, preferably throttling occurs inside, preferably the oil supply points each through a local depression of the support surface and one in this depression opening throttling bore are formed and wherein webs are provided between the depressions, their surfaces at least essentially at the same level like the rest of the support surface.
- the press roll according to the invention is therefore advantageous can also be used in particular with such pressing devices, those with a regular passage of scraps of paper or folds or fiber thickening through the press zone must be expected.
- the same problem always occurs also at the edge of the product web where the web thickness abruptly ends.
- the respective row of oil supply points is preferred at least one distributor channel formed in the support element assigned via which several oil supply points together with fresh lubricating oil.
- the holes can be at least partially individually connected to the distribution channel and / or at least partially grouped together and in groups be connected to this distribution channel.
- Means are preferably provided for the values for pressure and / or amount of fresh lubricating oil supplied individual and / or groups of holes to be set separately. It is the easiest way to do that Press roll as required for different operating conditions adapt.
- the supply of a respective row of oil supply points can completely independent of the one acting on the support element Pressure space or partially done via this pressure space.
- This type of lubrication can with all support elements regardless of the type of Line force generation (e.g. long piston, piston series, pressure profile adjustment, Pressure profile setting with flexible pressure bar and the like) can be applied.
- the supply of fresh lubricating oil along a number of oil supply points is advantageously carried out alternately independently from the pressure chamber acting on the support element and via the pressure chamber acting on the support element.
- each other parallel rows of a large number of each other separate, at least partially independent of the pressure chamber to be supplied with supplied oil supply points, the oil supply points two adjacent rows transverse to the direction of the Roll jacket preferably offset from one another, i.e. on Gap are arranged.
- FIG. 1 and 4 is a press roll purely schematically 10 with a stationary support 12 and a rotating roller shell 14 shown.
- the around the stationary carrier 12th revolving roll shell 14 is against at least one its inner peripheral surface 16 can be pressed on support element 18 Supported support 12.
- the support element 18 includes one of the inner peripheral surface 16 of the roll shell 14 facing support surface 20, the present Case at least partially lubricated hydrodynamically becomes.
- the support surface 20 is in the running direction LW of the roll shell 14 extended to along with one example a so-called counter surface formed by a counter roller to form an extended press zone.
- the one formed between the roll shell 14 and the support surface 20 Lubrication gap which is at least partially hydrodynamic lubricated press roll 10 becomes additional fresh chilled Lubricating oil supplied, for which the support surface 20 several oil supply points 22 (see also FIGS. 2, 3 and 5 till 9). Additional fresh lubricating oil is supplied the support element 18 is at least partially independent of one pressure chamber 19.
- the support element With a plurality of support elements, these can advantageously slidable in the radial direction relative to each other be, in particular to different pressure profiles receive.
- the support element is also conceivable 18 at least in groups while maintaining the desired relative mobility without gap against each other to seal.
- the oil supply points 22 are arranged in rows here, with at least one row R i extending in the direction of the roller axis and consisting of a plurality of separate oil supply points 22 which are fed at least partially independently of the pressure chamber being provided in the support surface 20 (compare in particular FIGS. 2, 3, 5 and 6).
- the oil supply points 22 are preferably each formed by a local depression 24 in the support surface 20 and a capillary-like bore 26 opening into this depression 24. Webs 28 are provided between the depressions 24, the surfaces of which are preferably at least substantially at the same level as the rest of the support surface, ie are not themselves lowered.
- FIGS. 2 to 4 is only one such row of oil supply points 22 intended.
- a respective row R i of oil supply points 22 can be assigned at least one distributor channel 30, preferably formed in the support element 18 (cf. FIG. 1).
- a distribution channel 30 which preferably extends generally in the direction of the roller axis, a plurality of oil supply points 22 are supplied together with fresh, cool lubricating oil.
- a single distribution channel 30 can be assigned to a respective row R i of oil supply points.
- several distributor channels 30 one behind the other in the direction of the roller axis for each row R i .
- oil can be supplied from one side or from two sides.
- the oil distributor can, for example, be cylindrical or conical or also have a stepped cross section.
- the cross section of the inlet opening or the sum of the cross sections of the inlet openings of the distribution channel 30 is advantageously larger than the sum of all cross sections of the bores 26 connected to this channel.
- the Bores 26 each have a diameter in the range of approximately 0.3 mm to 3 mm preferably 1 mm.
- the length of this Bores 26 is preferably about 5 to 100 mm, preferably 5 to 50 mm.
- the holes are basically also other types the throttling conceivable.
- the holes 26 can at least partially individually with the Distribution channel 30 may be connected. According to Figure 3, the However, holes 26 are at least partially combined into groups and connected in groups to the distribution channel 30 his. In the embodiment shown in Figure 3 the holes 26 are combined in pairs and via a feed line 33 common to the respective pair connected to the distribution channel 30.
- means 36 in particular valves, throttles or the like may be provided to the values for pressure and / or amount of fresh lubricating oil supplied individual and / or groups of holes 26 separately adjust.
- a valve 36 is inserted into the feed lines 33.
- FIG. 4 shows an oil supply point 22, the bore 26 of which opens directly into the pressure chamber 19 acting on the support element 18.
- the feed lines 36 are connected to the distribution channel 30, which is supplied with freshly cooled lubricating oil from the outside, ie independently of the pressure chamber 19 acting on the support element 18.
- At least one row R i from a plurality of separate oil supply points which are at least partially independent of the pressure chamber at least one parallel row from a plurality of oil supply points which are in turn separate from one another but are supplied via the pressure chamber can be provided.
- the rows R i are preferably arranged in such a way that in the running direction LW of the roll shell 14 preferably one row R i alternately each from a plurality of separate oil supply points 22 fed at least partially independently of the pressure space and a row R i parallel to this from a plurality of Oil supply points 22 that are independent of one another and are supplied via the pressure chamber are provided.
- Such a combined lubrication with an oil supply accommodates both via the pressure chamber and from the outside the other advantage that in the event of a possible Failure of the additional oil supply is still a sufficient one Emergency lubrication ensured via the pressure chamber is.
- This type of lubrication can be used with all support elements regardless of the type of line force generation (e.g. long piston, Piston row, pressure profile adjustment, pressure profile adjustment with flexible pressure bar) can be used.
- a separate supply of the rows with fresh lubricating oil can be provided. It is also preferably provided that the pressure values for the oil supply points 22 of a row R i, which are at least partially independent of the pressure chamber, and / or the pressure values for the oil supply points of different rows, which are at least partially independent of the pressure chamber, can be set separately. It is also conceivable to set the pressure values of several oil supply points 22 together, as was described with reference to FIG. 3.
- This setting can be done manually or electronically be controlled. It is also preferably ensured that that the oil pressure in the area of the inlet openings of the bores 26 at least temporarily set to such a high value can be that the roll shell 14 hydrostatic is supported. In practice, it is sufficient if such high pressure values are generated during start-up. While the operation should preferably be at least essentially one hydrodynamic lubrication.
- the depressions 24 are continuous at least on one side into the support surface partially also formed by the webs 28 20 about. This transition is preferably made by a convex curvature. Such transitions can both in the direction of travel LW of the roll shell 14 (see. Figures 1, 4 and 7 to 9) and in the transverse direction of the support element 18 be (see FIG. 3). So it is especially so possible that the depressions continuously on all sides for example via a convex curvature in the partial pass through the support surface 20 formed by the webs 28.
- the depressions 24 advantageously each have one maximum depth T of less than 0.5 mm, in particular less than 0.3 mm and preferably less than 0.1 mm.
- these recesses 24 are substantially round in plan view. In plan view, however, they can also have a rectangular, triangular or diamond shape or a contour with both rectilinear and curved or rounded boundaries.
- the recesses 24 of a respective row R i in plan view in particular also have such an identical or different contour that adjacent recesses 24 overlap while maintaining an intermediate web 28, viewed in the running direction LW.
- FIG. 5 several, here two, mutually parallel rows R i each consisting of a plurality of separate oil supply points 22, which are at least partially independent of the pressure chamber, are provided.
- the oil supply points 22 of the two adjacent rows R 1 and R 2 are transversely offset from each other to the running direction LW of the roll shell 14 by an amount A / 2.
- This amount A / 2 corresponds to half the distance 'A of the bores of a respective row of oil supply points, which distances are preferably essentially the same size in the two rows.
- the two rows R 1 and R 2 are therefore provided so that the respective oil supply points 22 are arranged on a gap.
- the bores 26 of the oil supply points 22 of a row R i are arranged at a distance A of approximately 5 to 50 mm, in particular 10 to 30 mm and preferably approximately 20 mm from one another.
- a distance of approximately 5 to 50 mm, in particular 10 to 30 mm and preferably approximately 20 mm, is provided between the bores 26 of the oil supply points 22 of two adjacent rows R i in the running direction LW of the roller shell 14.
- the Width B of the webs 28 is advantageously less than that Diameter D of the holes 26.
- the Width B of the webs 28 for example narrower than 10 mm, in particular narrower than 5 mm, preferably narrower than 1 mm and preferably be narrower than 0.2 mm.
- the depressions 24 and the intermediate webs 28 are preferably through Etching and in particular produced by electroerosion.
- FIGS. 6 and 7 have in common that that the recess 24 of the respective oil supply point 22 in Running direction LW of the roll shell 14 over a longer one Route continuously into the support surface 20 of the Support element 18 passes into at the point in question 7 can be formed by a web 28 through which this oil supply point 22 is separated from the subsequent one.
- FIG. 8 shows a number of oil supply points with a view in FIG Running direction LW.
- the depressions 24 of each bore 26 are separated by a web 28 at the level of the support surface 20. How results from this figure 8, the web width B is smaller than the diameter of the holes 26.
- the oil supply can through at least one end face Support element, from the carrier or via a special oil feed pipe 44 (see Figure 1).
- every oil supply is pressure controlled.
- the oil flow through the Drilling is due to the pressure drop occurring at this regulated.
- the pressure oil can also be partially supplied via the pressure piston 38 (see Figure 4).
- the pressure loss of the capillary-like bores results from the bore diameter, the bore length and the condition and the quantity of oil. Because of through achieved the webs and the capillary-like formation of the holes mutual separation of the oil supply points of the respective Row is different even when inconsistent Pressing ensures that all areas are adequate be supplied and the maximum outflow of oil through the drilling is limited. It is therefore also critical Operating conditions such as when running through optimal supply of oil from chunks or thickened paper to create and maintain the lubricating film 34 (see Figure 1) guaranteed. In addition, there is always a effective exchange of the oil adhering to the roller jacket ensured. There is an optimal temperature distribution with less heating of the lubricating film, which also means that the roller jacket is less thermal is charged.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Friction Gearing (AREA)
- Press Drives And Press Lines (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Presses And Accessory Devices Thereof (AREA)
- Rolling Contact Bearings (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Description
- Figur 1
- eine schematische, teilweise geschnittene Darstellung eines Teils einer Preßwalze,
- Figur 2
- eine Draufsicht auf einen Teil des Stützelements der in Figur 1 gezeigten Preßwalze, wobei der Walzenmantel weggelassen ist,
- Figur 3
- einen Schnitt durch einen Teil des in Figur 2 gezeigten Stützelements entlang der Reihe von Ölzufuhrstellen,
- Figur 4
- eine schematische Querschnittsdarstellung einer der der Figur 1 vergleichbaren Preßwalze, wobei jedoch eine über den Druckraum gespeiste Ölzufuhrstelle dargestellt ist,
- Figur 5
- eine schematische, perspektivische Teildarstellung eines mit zwei Reihen von Ölzufuhrstellen versehenen Stützelements,
- Figur 6
- eine schematische Darstellung eines Ausführungsbeispiels einer Ölzufuhrstelle,
- Figur 7
- eine schematische Darstellung eines weiteren Ausführungsbeispiels einer Ölzufuhrstelle und
- Figur 8
- eine Figur 3 vergleichbare Darstellung, wobei die den Ölzufuhrstellen zugeordneten Vertiefungen genauer dargestellt sind.
- 4
- Walzprodukt
- 6
- Filzband
- 8
- Gegenwalze
- 10
- Preßwalze
- 12
- Träger
- 14
- Walzenmantel
- 16
- Innenumfangsfläche
- 18
- Stützelement
- 19
- Druckraum
- 20
- Stützfläche
- 22
- Ölzufuhrstellen
- 24
- Vertiefung
- 26
- Bohrung
- 28
- Stege
- 30
- Verteilerkanal
- 33
- Zuleitung
- 34
- Schmierfilm
- 36
- Einstellmittel
- 38
- Druckkolben
- B
- Stegbreite
- D
- Durchmesser der Vertiefung
- LW
- Laufrichtung
- R
- Reihe
- A
- Abstand
- T
- Tiefe der Vertiefung
Claims (35)
- Preßwalze mit einem stationären Träger (12) und einem umlaufenden Walzenmantel (14), der über wenigstens ein gegen die Innenumfangsfläche (16) des Walzenmantels (14) anpreßbares, zumindest teilweise hydrodynamisch geschmiertes Stützelement (18) am Träger (12) abgestützt ist, das eine der Innenumfangsfläche (16) des Walzenmantels (14) zugewandte, in Laufrichtung (LW) des Walzenmantels (14) verlängerte Stützfläche (20) besitzt, die wenigstens eine sich in Richtung der Walzenachse erstreckende Reihe (Ri) aus einer Vielzahl von einer während des Betriebs erfolgenden hydrodynamischen Schmierung dienenden Ölzufuhrstellen (22) aufweist, über die dem Bereich zwischen Stützfläche (20) und Innenumfangsfläche (16) des Walzenmantels (14) frisches Schmieröl zugeführt wird und die zumindest teilweise unabhängig von einem das Stützband (18) beaufschlagenden Druckraum (19) gespeist sind,
dadurch gekennzeichnet,
daß die der hydrodynamischen Schmierung dienenden Ölzufuhrstellen (20) jeweils durch eine lokale Vertiefung (24) der Stützfläche (20) gebildet sind, in die jeweils eine drosselnde Bohrung (26) mündet, daß diese Ölzufuhrstellen (22) durch zwischen den Vertiefungen (24) vorgesehene Stege (28) voneinander getrennt sind, deren Oberflächen zumindest im wesentlichen auf dem gleichen Niveau wie die restliche Stützfläche liegen, daß die Vertiefungen allseitig kontinuierlich, vorzugsweise jeweils über eine konvexe Krümmung, in die teilweise durch die Stege (28) gebildete Stützfläche (20) übergehen und daß die Vertiefungen (24) jeweils eine maximale Tiefe (T) von weniger als 0,3 mm und vorzugsweise weniger als 0,1 mm besitzen. - Preßwalze nach Anspruch 1,
dadurch gekennzeichnet ,
daß die Ölzufuhrstellen (22) jeweils durch eine lokale Vertiefung (24) der Stützfläche (20) und eine in diese Vertiefung (24) mündende drosselnde Bohrung (26) gebildet sind, wobei zwischen den Vertiefungen (24) Stege (28) vorgesehen sind, deren Oberflächen zumindest im wesentlichen auf dem gleichen Niveau wie die restliche Stützfläche liegen. - Preßwalze nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß der Reihe (Ri) von Ölzufuhrstellen (22) wenigstens ein im Stützelement (18) vorgesehener Verteilerkanal (30) zugeordnet ist, über den mehrere Ölzufuhrstellen (22) gemeinsam mit frischem Schmieröl versorgt werden. - Preßwalze nach Anspruch 3,
dadurch gekennzeichnet,
daß sich der Verteilerkanal (30) allgemein in Richtung der Walzenachse erstreckt. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß mehrere in Richtung der Walzenachse hintereinander liegende Verteilerkanäle (30) vorgesehen sind. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Verteilerkanal (30) eine oder mehrere Eintrittsöffnungen aufweist und daß der Querschnitt der Eintrittsöffnung bzw. die Summe der Querschnitte der Eintrittsöffnungen öffnungen größer als die Summe der Querschnitte der (26) ist. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Bohrungen (26) kapillarartig ausgebildet sind und jeweils einen Durchmesser im Bereich von etwa 0,3 mm bis 3 mm, vorzugsweise 1 mm besitzen. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Bohrungen (26) jeweils eine Länge im Bereich von etwa 3 bis 100 mm, vorzugsweise 5 bis 50 mm besitzen. - Preßwalze nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet ,
daß den Bohrungen (26) Blenden oder dergleichen zugeordnet sind. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet ,
daß der Öldruck im Bereich der Eintrittsöffnungen der Bohrungen (26) größer als der Druck im Schmierfilm (34) über der Stützfläche (20) des Stützelements (18) ist. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet ,
daß die Bohrungen (26) zumindest teilweise einzeln mit dem Verteilerkanal (30) verbunden sind. - Preßwalze nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet ,
daß die Bohrungen (26) zumindest teilweise zu Gruppen zusammengefaßt und gruppenweise mit dem Verteilerkanal (30) verbunden sind. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet ,
daß Mittel (36) vorgesehen sind, um die Werte für Druck und / oder Menge des zugeführten frischen Schmieröls bezüglich einzelner und / oder Gruppen von Bohrungen (26) getrennt einzustellen. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Zufuhr frischen Schmieröls zu den Ölzufuhrstellen (22) einer Reihe völlig unabhängig von dem das Stützelement (18) beaufschlagenden Druckraum (19) erfolgt. - Preßwalze nach einem der Ansprüche 1 bis 13,
dadurch gekennzeichnet ,
daß die Zufuhr frischen Schmieröls zu den Ölzufuhrstellen (22) einer Reihe teilweise über den das Stützelement (18) beaufschlagenden Druckraum (19) erfolgt. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet ,
daß die Zufuhr frischen Schmieröls entlang der Reihe (Ri) von Ölzufuhrstellen (22) abwechselnd unabhängig von dem das Stützelement (18) beaufschlagenden Druckraum (19) und über den das Stützelement (18) beaufschlagenden Druckraum erfolgt. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet ,
daß zusätzlich zu der wenigstens einen Reihe (Ri) aus einer Vielzahl von voneinander getrennten, zumindest teilweise unabhängig vom Druckraum gespeisten Ölzufuhrstellen (22) wenigstens eine dazu parallele Reihe aus einer Vielzahl von voneinander getrennten, über den Druckraum gespeisten Ölzufuhrstellen vorgesehen ist. - Preßwalze nach Anspruch 17,
dadurch gekennzeichnet ,
daß in Laufrichtung (LW) des Walzenmantels (14) abwechselnd jeweils eine Reihe (Ri) aus einer Vielzahl von voneinander getrennten, zumindest teilweise unabhängig vom Druckraum gespeisten Ölzufuhrstellen (22) und eine dazu parallele Reihe aus einer Vielzahl von voneinander unabhängigen, über den Druckraum (19) gespeisten Ölzufuhrstellen (22) vorgesehen ist. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet ,
daß unterschiedliche Reihen aus jeweils einer Vielzahl von voneinander getrennten, zumindest teilweise unabhängig vom Druckraum gespeisten Ölzufuhrstellen (22) getrennt voneinander mit frischem Schmieröl versorgt werden. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet ,
daß die Druckwerte für die zumindest teilweise unabhängig vom Druckraum gespeisten Ölzufuhrstellen (22) einer Reihe (Ri) und / oder die Druckwerte für die zumindest teilweise unabhängig vom Druckraum gespeisten Ölzufuhrstellen (22) verschiedener Reihen (Ri) getrennt einstellbar sind. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet ,
daß der Öldruck im Bereich der Eintrittsöffnungen der Bohrungen (26) zumindest zeitweise, vorzugsweise während des Anfahrens, auf einen so hohen Wert einstellbar ist, daß der Walzenmantel (14) hydrostatisch abgestützt wird. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet ,
daß die Vertiefungen (24) zumindest einseitig, vorzugsweise in Laufrichtung (LW), kontinuierlich, vorzugsweise über eine konvexe Krümmung, in die teilweise durch die Stege (28) gebildete Stützfläche (20) übergehen. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet ,
daß die Vertiefungen allseitig kontinuierlich, vorzugsweise jeweils über eine konvexe Krümmung, in die teilweise durch die Stege (28) gebildete Stützfläche (20) übergehen. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet ,
daß die Vertiefungen (24) jeweils eine maximale Tiefe (T) von weniger als 0,5 mm, insbesondere weniger als 0,3 mm und vorzugsweise weniger als 0,1 mm besitzen. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet ,
daß die Vertiefungen (24) in Draufsicht jeweils eine zumindest im wesentlichen kreisrunde, dreieckige, rechteckige oder Rautenform besitzen. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet ,
daß die Vertiefungen (24) der Reihe (Ri) in Draufsicht eine solche gleiche oder unterschiedliche Kontur besitzen, daß sich benachbarte Vertiefungen (24) unter Aufrechterhaltung eines dazwischenliegenden Steges (28) überlappen. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Bohrung (26) einer jeweiligen Ölzufuhrstelle (22) in Draufsicht im Flächenschwerpunkt der zugehörigen Vertiefung (24) oder in Laufrichtung (LW) des Walzenmantels (14) betrachtet vor diesem Flächenschwerpunkt angeordnet ist. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß mehrere, zueinander parallele Reihen (Ri) aus jeweils einer Vielzahl von voneinander getrennten, zumindest teilweise unabhängig vom Druckraum gespeisten Ölzufuhrstellen (22) vorgesehen sind und daß die Ölzufuhrstellen (22) zweier benachbarter Reihen (Ri) quer zur Laufrichtung (LW) des Walzenmantels (14) vorzugsweise gegeneinander versetzt, d.h. auf Lücke angeordnet sind. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet ,
daß die Bohrungen (26) der Ölzufuhrstellen (22) einer Reihe (Ri) in einem Abstand (A) von etwa 5 bis 50 mm, insbesondere 10 bis 30 mm und vorzugsweise etwa 20 mm voneinander angeordnet sind. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet ,
daß wenigstens eine Reihe (Ri) aus einer Vielzahl von voneinander getrennten, zumindest teilweise unabhängig vom Druckraum gespeisten Ölzufuhrstellen (22) in Laufrichtung (LW) des Walzenmantels (14) betrachtet im Bereich zwischen 1/4 bis 3/4, vorzugsweise 1/2 bis 3/4 der Stützfläche (20) angeordnet ist. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet ,
daß die Breite (B) der Stege (28) geringer als der minimale Durchmesser (D) der Bohrungen (26) ist. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Breite (B) der Stege (28) schmaler als 10 mm, insbesondere schmaler als 5 mm, bevorzugt schmaler als 1 mm und vorzugsweise schmaler als 0,2 mm ist. - Preßwalze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die in der Stützfläche (20) vorgesehenen Vertiefungen (24) und die dazwischenliegenden Stege (28) durch Ätzen und insbesondere durch Elektroerosion gebildet sind. - Preßwalz nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß wenigstens eine Reihe (Ri) nur im Randbereich Bohrungen (26) aufweist, d.h. im mittleren Bereich bohrungsfrei ist. - Preßwalze nach einem der Ansprüche 1 bis 33,
dadurch gekennzeichnet,
daß wenigstens eine Reihe (Ri) nur im innenliegenden Bereich Bohrungen (26) aufweist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19544978 | 1995-12-01 | ||
DE19544978A DE19544978C2 (de) | 1995-12-01 | 1995-12-01 | Preßwalze |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0777012A1 EP0777012A1 (de) | 1997-06-04 |
EP0777012B1 true EP0777012B1 (de) | 2001-03-21 |
Family
ID=7779008
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96115525A Expired - Lifetime EP0777012B1 (de) | 1995-12-01 | 1996-09-27 | Presswalze |
Country Status (8)
Country | Link |
---|---|
US (1) | US5843283A (de) |
EP (1) | EP0777012B1 (de) |
JP (1) | JP3877241B2 (de) |
KR (1) | KR970043583A (de) |
AT (1) | ATE199954T1 (de) |
AU (1) | AU7038596A (de) |
CA (1) | CA2191003C (de) |
DE (2) | DE19544978C2 (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6139691A (en) * | 1997-09-30 | 2000-10-31 | Valmet-Karlstad Ab | Shoe press |
US6036909A (en) * | 1997-11-25 | 2000-03-14 | Kimberly-Clark Worldwide, Inc. | Method for embossing web material using an extended nip |
FI112511B (fi) * | 1999-04-15 | 2003-12-15 | Metso Paper Inc | Menetelmä paperi- tai kartonkirainan poikkisuuntaiseksi profiloimiseksi nipissä |
FI991154A0 (fi) * | 1999-05-21 | 1999-05-21 | Sunds Defibrator Pori Oy | Pitkänippipuristin |
DE19953474A1 (de) * | 1999-11-05 | 2001-05-10 | Voith Paper Patent Gmbh | Schuhpresswalze |
FI20002630A0 (fi) * | 2000-11-30 | 2000-11-30 | Teuvo Rajamaeki | Pitkänippipuristuslaite kuiturainoja kuljettavia koneita varten |
JP2005516132A (ja) * | 2002-01-29 | 2005-06-02 | メッツォ ペーパー インコーポレイテッド | 塗工若しくは未塗工繊維ウェブ処理装置及びその動作方法 |
FI20020159A (fi) * | 2002-01-29 | 2003-07-30 | Metso Paper Inc | Pinnan muokkauslaite ja laitetta käyttävä menetelmä päällystetyn tai päällystämättömän kuiturainan viimeistelemiseksi |
JP3875898B2 (ja) * | 2002-02-06 | 2007-01-31 | イチカワ株式会社 | 抄紙機のシュープレス装置 |
AT412218B (de) * | 2002-10-17 | 2004-11-25 | Andritz Ag Maschf | Presswalze |
AT411908B (de) * | 2002-10-17 | 2004-07-26 | Andritz Ag Maschf | Presswalze mit einem auf einem träger verschiebbar gelagerten pressschuh |
DE10259232A1 (de) * | 2002-12-17 | 2004-07-15 | Eduard Küsters Maschinenfabrik GmbH & Co. KG | Vorrichtung zum Bilden eines Langspalts |
US8651240B1 (en) | 2012-12-24 | 2014-02-18 | United Technologies Corporation | Pressurized reserve lubrication system for a gas turbine engine |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3970515A (en) * | 1973-11-05 | 1976-07-20 | Beloit Corporation | Controlled sequence pressure nip |
DE3408119A1 (de) * | 1984-02-06 | 1985-08-14 | Sulzer-Escher Wyss GmbH, 7980 Ravensburg | Nasspresse zum entwaessern einer faserbahn |
SE461154B (sv) * | 1988-05-25 | 1990-01-15 | Valmet Paper Machinery Inc | Press med laangt nyp foer pappers- eller kartongmaskiner |
SE461171C (sv) * | 1988-05-25 | 1992-08-17 | Valmet Paper Machinery Inc | Press med laangt nyp foer pappers- eller kartongmaskiner |
FI91789C (fi) * | 1989-12-21 | 1994-08-10 | Tampella Oy Ab | Paperikoneen pitkävyöhykepuristin |
DE4138788C2 (de) * | 1991-11-26 | 1995-05-18 | Escher Wyss Gmbh | Vorrichtung zur Entwässerung einer Faserstoffbahn |
SE469600B (sv) * | 1991-12-23 | 1993-08-02 | Valmet Karlstad Ab | Trycksko |
DE4337583A1 (de) * | 1993-11-04 | 1995-05-11 | Voith Gmbh J M | Preßvorrichtung zum Behandeln einer Warenbahn, insbesondere Papierbahn |
-
1995
- 1995-12-01 DE DE19544978A patent/DE19544978C2/de not_active Revoked
-
1996
- 1996-09-27 EP EP96115525A patent/EP0777012B1/de not_active Expired - Lifetime
- 1996-09-27 DE DE59606625T patent/DE59606625D1/de not_active Expired - Lifetime
- 1996-09-27 AT AT96115525T patent/ATE199954T1/de not_active IP Right Cessation
- 1996-10-25 AU AU70385/96A patent/AU7038596A/en not_active Abandoned
- 1996-11-22 CA CA002191003A patent/CA2191003C/en not_active Expired - Fee Related
- 1996-11-29 JP JP32019396A patent/JP3877241B2/ja not_active Expired - Fee Related
- 1996-12-02 US US08/753,789 patent/US5843283A/en not_active Expired - Fee Related
- 1996-12-02 KR KR1019960060953A patent/KR970043583A/ko not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
CA2191003A1 (en) | 1997-06-02 |
ATE199954T1 (de) | 2001-04-15 |
KR970043583A (ko) | 1997-07-26 |
AU7038596A (en) | 1997-06-05 |
CA2191003C (en) | 2006-05-09 |
JP3877241B2 (ja) | 2007-02-07 |
DE19544978C2 (de) | 1998-07-30 |
EP0777012A1 (de) | 1997-06-04 |
DE59606625D1 (de) | 2001-04-26 |
DE19544978A1 (de) | 1997-06-05 |
US5843283A (en) | 1998-12-01 |
JPH09174296A (ja) | 1997-07-08 |
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