EP0814196B1 - Walze - Google Patents
Walze Download PDFInfo
- Publication number
- EP0814196B1 EP0814196B1 EP97109726A EP97109726A EP0814196B1 EP 0814196 B1 EP0814196 B1 EP 0814196B1 EP 97109726 A EP97109726 A EP 97109726A EP 97109726 A EP97109726 A EP 97109726A EP 0814196 B1 EP0814196 B1 EP 0814196B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- heat exchanger
- liquid
- roller according
- interior
- 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
Links
Images
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
- D21G1/0253—Heating or cooling the rolls; Regulating the temperature
- D21G1/0266—Heating or cooling the rolls; Regulating the temperature using a heat-transfer fluid
-
- 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
- D21F5/02—Drying on cylinders
- D21F5/022—Heating the cylinders
- D21F5/027—Heating the cylinders using a heat-transfer fluid between the heating means and the cylinder shell
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F5/00—Elements specially adapted for movement
- F28F5/02—Rotary drums or rollers
Definitions
- the invention relates to a roller with a roller tube, which has an elastic covering on the outside.
- Such a roller is known from DE 41 11 911 A1.
- Such rolls are used, for example, in super calenders or soft calenders. Because of the elastic They are often also called “soft” Called rollers.
- the soft rollers form together with so-called “hard” rollers a nip, through which a material web, for example a paper web, can be performed, the surface of Application of pressure and possibly an increased Temperature should be smoothed.
- the surfaces of the rollers heat up during operation, among other things because of the performed in the elastic covering Flexing.
- the resulting high temperatures endanger the elastic covering, i.e. security against destruction of the covering becomes drastic reduced.
- roller tube as a roller jacket of a deflection adjustment roller or bending compensation roller used is where the roll shell by hydrostatic or hydrodynamic support elements can be supported Heat is transported away by the hydraulic oil inside the roller become. This measure to stabilize the temperature, so to speak, with bending adjustment rollers incidentally results, but is relatively expensive.
- Cooling coolant there is the option of rolling from outside by blowing with cold air or spraying with Cooling coolant.
- the cooling options are limited here. Especially when spraying with a coolant there is a risk that this Coolant also on the material web to be treated arrives.
- EP 0 567 875 A1 shows a cooling roll for paper machines, where cooling by liquid evaporation is generated inside the roller body.
- the roller body surrounds a closed Cavity in which a capacitor is arranged is.
- DE 24 00 615 A1 shows a tempering roller for calenders, some with a heat transfer medium is filled.
- the Heat transfer medium has the roller inside a radiator along its entire length, which is of is flowed through another medium.
- the radiator at the roller ends for example with a smaller or larger contact area as required to be equipped with the heat transfer medium.
- the invention has for its object a soft Cool the roller in a simple way.
- roller tube has a closed Surrounding interior, in which an evaporable Liquid and a heat exchanger are arranged.
- Liquid film With the action of the centrifugal force liquid inside the interior wall of the roller tube pressed. Then there imagines Liquid film. So much should be expedient Liquid should be present in the interior closed liquid film with a thickness of a few Millimeters forms.
- This liquid will now heat is supplied from the outside through the roller tube, so that the liquid evaporates.
- the evaporated liquid that is, the liquid vapor reaches the heat exchanger and can give off its warmth there.
- the heat is then transported away through the heat exchanger, i.e. removed from the interior.
- the steam can then on the heat exchanger condense.
- the condensate then arrives back to the outside wall of the interior, i.e. to the Inside of the roller tube, and the cooling circuit goes start all over again.
- the temperature of the heat exchanger is preferably up a temperature below the condensation temperature the liquid can be lowered. It is achieved that the Steam doesn't just condense. Rather, the condensate cooled further. This allows you to get a larger one Temperature difference between the roller tube and the Generate heat exchanger. This improves heat dissipation, because the heat exchanger has a larger amount of heat can dissipate.
- the interior is preferably sealed gas-tight. In this case, the cooling circuit remains closed, i.e. no "refrigerant" is lost. Then you can not only use water as a refrigerant, but also other liquids, for example a have a lower boiling point. By choosing the respective Liquid in the interior of the roller tube leaves the temperature to which the roller tube heats up can set within certain limits.
- the roller is preferably journalled, the Pins or related parts to the interior Complete axial ends. It is easy to achieve Way a gas-tight closed all around Inner space. Draw such pin-bearing rollers is characterized by a very low weight, which in turn leads to a desired steep characteristic curve leads in the calender. With the additional heat exchanger, which is now arranged in the interior of such a roller is, the roller can be done with simple means cool so that the performed in the elastic cover Whaling work has no negative consequences in terms of Roller temperature and the risk of the coating.
- the heat exchanger preferably rotates together the roller tube. This has two advantages. Firstly, relieved it the seal of the heat exchanger opposite the roller tube. If the heat exchanger is common mounted with the roller tube, it can be inside be held stationary so to speak, so that no gaps must be sealed between moving parts. To the another, the rotating heat exchanger leads to one improved distribution of the condensing on it Liquid. Droplets of liquid arising from the Forming steam on the heat exchanger becomes relatively quick hurled again at the wall of the roller tube, where they can be vaporized again. This will in used a kind of pump in the refrigerant circuit.
- the heat exchanger is preferably a cooling medium of outside feed.
- the use of a cooling medium is a relatively easy way to get heat from the Transport the interior of the roller tube. you could also be electrical components with negative temperature coefficients use. For those to be discharged Amounts of heat is the effort you have to do, however relatively large.
- the cooling medium for example a coolant, can be relative in the heat exchanger be warmed up strongly. You’re not limited to allow heating only by 1 or 2 ° C. Rather, the coolant can also change by 10 ° C, Warm 20 ° C or more. Because the coolant is a can assume higher temperature is for removal the same amount of heat a correspondingly lower Volume flow of the coolant through the heat exchanger necessary. However, there is no risk that an uneven temperature distribution in the roller tube results.
- At least one pin preferably has a rotary entry for the cooling medium.
- a rotating introduction is well known. Because liquids here must be transferred is the sealing problem not as difficult here as with a gas transmission.
- the rotary inlet is on one side of the heat exchanger arranged that are not in with the interior Connection is established. This way doesn't exist either the danger that gas or Steam can escape from the interior.
- the heat exchanger is advantageously helical guided tube trained. So that the Heat exchanger over a certain range in the axial direction extend. The area used for the exchange of the Heat between the cooling medium supplied and the im Interior steam is available thus enlarged in a simple manner.
- An evacuation device for the interior is preferred intended. With such an evacuation device the pressure prevailing in the interior can be reduced become. So that the boiling temperature for the in Lowered liquid inside. On too in this way it is possible to control the temperature of the roller tube to influence. The lower the pressure is the sooner the liquid evaporates. Since evaporating the largest amount of heat can be "consumed” one namely the temperature of the roller tube with a good nutrition near the boiling point of the liquid settle in the interior.
- the elastic covering is preferably made of plastic educated. For example, come as plastics Epoxy resins into consideration. Plastic coverings can be high be made elastic.
- a roller rotating drive is preferably provided. This roller rotation drive can then also in the roller Set rotation if there is no material web through the nip is guided or the nip is still is not closed. In this case the liquid film already on the inside of the roller tube before the actual calendering operation starts generated so that the cooling can start immediately.
- a roller 1 has a roller tube 2 which is connected by means of pins 3, 4 in bearings 5, 6 in a not shown Calender is stored.
- the bearings 5, 6 can possibly raised in the vertical direction or lowered or adjusted horizontally, around a nip 7 with a schematically shown to open or close the second roller 8.
- the pins 3, 4 widen at the end on the roll side up to the diameter of the roller tube 2 so that they have walls 9, 10 form, which together with the roller tube 2 Surround or enclose interior 11.
- this closed interior 11 there is a predetermined one Amount of vaporizable liquid 12, for example Water, arranged.
- the amount of liquid should be so large that in operation, then, when the roller rotates on the inner wall 13 of the roller tube 2 a liquid film with a thickness of a few Millimeters forms. This is due to the figure shown that both on the upper inner wall also on the lower inner wall 13 of the roller tube corresponding liquid film 12 can be seen. Naturally there will be no undulating surface there form. This representation was chosen only to the To clarify the term "liquid”.
- a heat exchanger 14 also projects into the interior 11 which, as shown schematically, as helically guided tube is formed. This heat exchanger 14 thus protrudes beyond a certain one Distance axially into the interior 11.
- the heat exchanger 14 is provided with connections 15, 16, which are guided by the left pin 4.
- a static seal 17 is provided so that the Interior 11 is actually sealed gas-tight.
- the pin 4 is preferably on the non-drive side or leader side arranged.
- a refrigerant can be added through the connections 15, 16. or be dissipated, as indicated by the arrows 18 is shown schematically.
- a refrigerant for example water can also be used.
- the Zuund The refrigerant is removed by a known rotary introduction 19. In this rotary introduction parts must be sealed against one another become. However, this is not critical as well no connection between the Interior 11 and the surrounding area can be produced.
- the rotary inlet 19 allows the entry of liquids or gases only inside the heat exchanger 14, i.e. the side of the heat exchanger 14 that is not with the interior 11 is connected.
- the interior 11 is also via an evacuation valve 20 connected to an evacuation port 21.
- the evacuation port 21 can, for example, with a vacuum pump, if necessary also a manually operated vacuum pump, get connected. If the evacuation valve 20 is opened, one can prevail in the interior 11 Reduce pressure, which also lowers the boiling temperature the liquid 12 are reduced in the interior can.
- the outside of the roller tube 2 is elastic Cover 22 provided by a plastic, for example epoxy resin is formed. Operational, i.e. when the two rollers 1, 8 cooperate the covering 22 tumbled. This creates heat, too a temperature increase of the covering 22 and also the Roll tube 2 leads.
- the roller 1 rotates so that a closed one under the action of centrifugal force Liquid film on the inner wall 13 of the Roll tube 2 forms.
- the there on the inner wall 13 liquid present is heated and as soon as the Boiling point is reached, evaporates.
- the boiling temperature can be done by choosing a suitable liquid and also by choosing the right pressure in the Set interior 11 to a suitable value.
- the interior 11 is gas-tight, so that there is a closed circuit inner wall 13 of the roller tube 2 - heat exchanger 14 - inner wall 13 result can.
- You can also use other liquids than 12 Use water, such as alcohols or others Hydrocarbons.
- a drive 23 is also provided, which drives the roller 1 can set in rotation.
- This drive 23 acts on the pin 3, for example.
- the rotational movement the roller 1 can thus start before the nip 7 is closed. So you can with the cooling of the roller before starting operation kick off.
- the temperature will decrease the refrigerant liquid flowing through the heat exchanger 14 also do not increase so that no heat exchange takes place. On the other hand, there is no such thing excessive cooling of the roller tube 2 and thus the Linings 22 connected.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
- einzige Figur
- einen schematischen Querschnitt durch eine Walze.
Claims (11)
- Walze mit einem Walzenrohr, das an seiner Außenseite einen elastischen Belag aufweist, dadurch gekennzeichnet, daß das Walzenrohr einen geschlossenen Innenraum (11) umgibt, in dem eine verdampfbare Flüssigkeit (12) und ein Wärmetauscher (14) angeordnet sind.
- Walze nach Anspruch 1, dadurch gekennzeichnet, daß die Temperatur des Wärmetauschers (14) auf eine Temperatur unterhalb der Kondensationstemperatur der Flüssigkeit (12) absenkbar ist.
- Walze nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Innenraum (11) gasdicht abgeschlossen ist.
- Walze nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß sie zapfengelagert ist, wobei die Zapfen (3, 4) oder damit verbundene Teile (9, 10) den Innenraum (11) an den axialen Enden abschließen.
- Walze nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Wärmetauscher (14) gemeinsam mit dem Walzenrohr (2) rotiert.
- Walze nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß dem Wärmetauscher (14) ein Kühlmedium (18) von außen zuführbar ist.
- Walze nach Anspruch 6, dadurch gekennzeichnet, daß mindestens ein Zapfen (4) eine Dreheinführung (19) für das Kühlmedium (18) aufweist.
- Walze nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Wärmetauscher (14) als schraubenlinienförmig geführtes Rohr ausgebildet ist.
- Walze nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß eine Evakuiereinrichtung (20, 21) für den Innenraum (11) vorgesehen ist.
- Walze nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der elastische Belag (22) aus Kunststoff gebildet ist.
- Walze nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß ein Walzendrehantrieb (23) vorgesehen ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19624737A DE19624737A1 (de) | 1996-06-21 | 1996-06-21 | Walze |
DE19624737 | 1996-06-21 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0814196A2 EP0814196A2 (de) | 1997-12-29 |
EP0814196A3 EP0814196A3 (de) | 1999-01-13 |
EP0814196B1 true EP0814196B1 (de) | 2002-08-28 |
Family
ID=7797547
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97109726A Expired - Lifetime EP0814196B1 (de) | 1996-06-21 | 1997-06-14 | Walze |
Country Status (5)
Country | Link |
---|---|
US (1) | US6405790B1 (de) |
EP (1) | EP0814196B1 (de) |
JP (1) | JP3373758B2 (de) |
CA (1) | CA2208293A1 (de) |
DE (2) | DE19624737A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19814597C1 (de) * | 1998-04-01 | 1999-10-14 | Voith Sulzer Papiertech Patent | Walze |
DE19846520A1 (de) * | 1998-10-09 | 2000-04-13 | Voith Sulzer Papiertech Patent | Walze, insbesondere Kalanderwalze |
FI20000718A (fi) * | 2000-03-29 | 2001-09-30 | Metso Paper Inc | Polymeeritelan lämpötilan tasausjärjestelmä |
FI20002885A0 (fi) * | 2000-12-29 | 2000-12-29 | Santasalo Powermet Oy | Menetelmä paperi- tai kartonkikoneen tai jälkikäsittelykoneen telan telapäädyn valmistamiseksi ja tela, etenkin kuumennettava tela |
DE102005000794A1 (de) * | 2005-01-05 | 2006-07-13 | Voith Paper Patent Gmbh | Vorrichtung und Verfahren zur Herstellung und/oder Veredelung einer Faserstoffbahn |
US8127462B2 (en) | 2006-04-21 | 2012-03-06 | Osvaldo Ricardo Haurie | Cylindrical dryer having conduits provided within a plurality of holding plates |
US7614161B2 (en) * | 2006-04-21 | 2009-11-10 | Osvaldo Ricardo Haurie | Cylindrical dryer having conduits for heating medium |
WO2012083387A1 (en) * | 2010-12-24 | 2012-06-28 | Ezi Fix Mining Solutions Pty Ltd | Roller |
CN105365134A (zh) * | 2014-08-29 | 2016-03-02 | 上海联净电子科技有限公司 | 一种高效无结露冷却辊 |
JP6595368B2 (ja) * | 2016-02-23 | 2019-10-23 | 株式会社ササクラ | 冷却ロール及びその製造方法 |
DE102019132144A1 (de) * | 2019-11-27 | 2020-11-12 | Canon Production Printing Holding B.V. | Temperierungswalze zur Temperierung eines Aufzeichnungsträgers |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE225767C (de) | ||||
US2547086A (en) * | 1947-06-21 | 1951-04-03 | American Viscose Corp | Heating drum |
CH540060A (de) * | 1971-07-08 | 1973-08-15 | Buehler Ag Geb | Verfahren und Vorrichtung zur Temperaturegalisierung einer rotierenden Mahlwalze eines Walzenstuhles |
DE2400615A1 (de) * | 1974-01-08 | 1975-07-17 | Seico Ind Elektrowaerme Gmbh | Einrichtung zur temperierung von walzen, insbesondere von kalanderwalzen |
US4183298A (en) * | 1977-12-23 | 1980-01-15 | Roland Offsetmaschinenfabrik Faber & Schleicher Ag | Water cooled ink roller for printing presses |
DE2814244C2 (de) * | 1978-04-03 | 1985-01-10 | Kleinewefers Gmbh, 4150 Krefeld | Hohlwalze mit koaxial eingebautem Verdrängerkörper |
JPS5851528B2 (ja) | 1980-03-08 | 1983-11-17 | 株式会社 共立機械製作所 | 繊維機械におけるスピンドルの始動・停止機構 |
JPS5861318A (ja) | 1981-10-06 | 1983-04-12 | Nisshin Steel Co Ltd | 熱回収用ロ−ル |
JPS6038717A (ja) | 1983-08-11 | 1985-02-28 | Akai Electric Co Ltd | 情報再生装置 |
DD225767A1 (de) * | 1983-12-08 | 1985-08-07 | Koethen Ing Hochschule | Kuehlwalze, insbesondere zum praegen und gravieren von folien |
US4631016A (en) * | 1985-09-30 | 1986-12-23 | The Dow Chemical Company | Film casting apparatus including heat transfer roll |
JPS63282393A (ja) | 1987-05-09 | 1988-11-18 | 株式会社ササクラ | 回転ローラ式冷却装置 |
DE4111911A1 (de) * | 1991-04-12 | 1992-10-15 | Voith Gmbh J M | Walze |
DE4213688A1 (de) * | 1992-04-25 | 1992-11-05 | Voith Gmbh J M | Verfahren und einrichtung zur kuehlung einer rotierenden walze durch kuehlmittelverdampfung |
JP2613549B2 (ja) | 1993-09-08 | 1997-05-28 | 日本ボールドウィン株式会社 | 冷却ローラ装置 |
US5676754A (en) * | 1995-03-20 | 1997-10-14 | Advance Systems, Inc. | Apparatus for preventing ink resoftening on a printed web as the web travels over a chill roll |
-
1996
- 1996-06-21 DE DE19624737A patent/DE19624737A1/de not_active Withdrawn
-
1997
- 1997-06-12 JP JP15465697A patent/JP3373758B2/ja not_active Expired - Fee Related
- 1997-06-14 DE DE59708042T patent/DE59708042D1/de not_active Expired - Fee Related
- 1997-06-14 EP EP97109726A patent/EP0814196B1/de not_active Expired - Lifetime
- 1997-06-19 CA CA002208293A patent/CA2208293A1/en not_active Abandoned
- 1997-06-19 US US08/879,140 patent/US6405790B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0814196A3 (de) | 1999-01-13 |
DE59708042D1 (de) | 2002-10-02 |
US6405790B1 (en) | 2002-06-18 |
JPH1089825A (ja) | 1998-04-10 |
JP3373758B2 (ja) | 2003-02-04 |
CA2208293A1 (en) | 1997-12-21 |
EP0814196A2 (de) | 1997-12-29 |
DE19624737A1 (de) | 1998-01-02 |
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