EP1585859A2 - Beheizter zylinder - Google Patents
Beheizter zylinderInfo
- Publication number
- EP1585859A2 EP1585859A2 EP03799587A EP03799587A EP1585859A2 EP 1585859 A2 EP1585859 A2 EP 1585859A2 EP 03799587 A EP03799587 A EP 03799587A EP 03799587 A EP03799587 A EP 03799587A EP 1585859 A2 EP1585859 A2 EP 1585859A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- jacket
- heated
- cladding layer
- cylinder
- layer
- 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- Withdrawn
Links
Classifications
-
- 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
- D21F5/021—Construction of the cylinders
Definitions
- the invention relates to a heated cylinder for drying paper, cardboard, tissue or other fibrous webs in machines for producing and / or finishing the fibrous web with a cylinder jacket which is at least partially heated from the inside and / or partially in the cylinder jacket.
- the heat energy per surface unit that can be transferred from the inside to the outside is limited.
- the object of the invention is therefore to minimize these tensile stresses in the heated cylinder without reducing the transferable thermal energy.
- the object was achieved in that the cylinder jacket consists of at least two jacket layers and the material of an outer jacket layer has a larger coefficient of thermal expansion at an assembly temperature which is below the mean operating temperature and a smaller coefficient of thermal expansion at an assembly temperature which is above the mean operating temperature than the material has an inner cladding layer and / or the layer thickness of the outermost cladding layer is less than that of an inner cladding layer.
- the average operating temperature for a cylinder jacket with only two Jacket layers the temperature in the contact area of the jacket layers and, in the case of more than two jacket layers, the mean value between the inner and the outer surface of the cylinder jacket during normal operation of the cylinder for drying the fibrous web.
- Sheath layer made of a material with relatively low thermal conductivity, so their small thickness ensures a sufficient heat transfer to
- the cladding layer set a minimal limit.
- the assembly temperature is above the average operating temperature. It should be taken into account here that a subsequent stress relief annealing preferably occurs cannot completely eliminate the tensions between the cladding layers.
- the outer jacket layer should contract less when cooling after assembly than the inner one. The minimum of the stresses should be reached with the temperature distribution occurring during the operation of the cylinder.
- the respective inner cladding layer expands less than before and / or the outer cladding layer above it expands more than before.
- the impediment to the stretch in one layer inevitably leads to an increase in the stretch in the adjacent layer.
- the material pairings and thickness ratios can even be selected such that similarly strong expansions occur in the respective inner and outer cladding layer.
- the heating takes place, for example, via water vapor from the inside or by the heating medium being guided through channels in or between the cladding layers.
- the cylinder jacket consists of two jacket layers.
- the cylinder jacket can also consist of more than two, preferably three jacket layers.
- outer and inner jacket layers are also arranged within the cylinder jacket. The only essential for the designation "inner” or “outer” is the question of which sheath layer is arranged above the other.
- the jacket layers should at least be fixed against relative rotation. This can be done by welding, screwing or gluing.
- the material of the outermost cladding layer is a has higher thermal conductivity than the material of one, preferably all, inner cladding layers. This reduces the temperature gradient in the outer cladding layer and thus the tensile stresses within it.
- the material of the outermost cladding layer has a lower modulus of elasticity than the material of a preferably inner cladding layer.
- thermal conductivity and weight result in particular if at least one middle and / or the outermost cladding layer consists of aluminum.
- the outermost jacket layer should consist of a hard material, preferably in the range of 170 to 220 HB hardness.
- an inner cladding layer is designed as a load-bearing layer.
- Cylinders heated in this way can be used, in particular, as drying cylinders in drying sections for drying and as a press roll in press sections for dewatering fibrous webs.
- the drying cylinder has a cylinder jacket made of metal, the interior 2 of the heated cylinder being heated with steam. The one brought in by the steam
- Thermal energy is transferred to the outside through the cylinder jacket and serves there for heating and drying the fibrous web 1 wrapping around the drying cylinder.
- the fibrous web 1 is usually still pressed by a dryer fabric against the outer surface of the drying cylinder.
- the cylinder jacket consists of two jacket layers 3, 4 made of different materials.
- the outer cladding layer 4 consists of a material whose coefficient of thermal expansion is greater than that of the material of the inner cladding layer 3. This means that the outer cladding layer 4, despite the lower temperature in this layer, expands more than before, which leads to a reduction in the tensile stress.
- the jacket layers 3, 4 are designed as tubes which are connected to one another by screwing.
Landscapes
- Paper (AREA)
- Drying Of Solid Materials (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002160509 DE10260509A1 (de) | 2002-12-21 | 2002-12-21 | Beheizter Zylinder |
DE10260509 | 2002-12-21 | ||
PCT/EP2003/051048 WO2004057103A2 (de) | 2002-12-21 | 2003-12-18 | Beheizter zylinder |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1585859A2 true EP1585859A2 (de) | 2005-10-19 |
Family
ID=32404167
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03799587A Withdrawn EP1585859A2 (de) | 2002-12-21 | 2003-12-18 | Beheizter zylinder |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1585859A2 (de) |
JP (1) | JP4656946B2 (de) |
AU (1) | AU2003299254A1 (de) |
DE (1) | DE10260509A1 (de) |
WO (1) | WO2004057103A2 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007504366A (ja) * | 2003-09-01 | 2007-03-01 | メッツォ ペーパー インコーポレイテッド | 熱ロール |
DE102005000794A1 (de) | 2005-01-05 | 2006-07-13 | Voith Paper Patent Gmbh | Vorrichtung und Verfahren zur Herstellung und/oder Veredelung einer Faserstoffbahn |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI106054B (fi) * | 1999-03-29 | 2000-11-15 | Valmet Corp | Paperi-/kartonkikoneen tai jälkikäsittelykoneen termotela ja menetelmä termotelan valmistamiseksi |
US4196689A (en) | 1977-01-17 | 1980-04-08 | J. M. Voith Gmbh | Apparatus for drying paper webs or the like |
WO1995010659A1 (en) | 1993-10-13 | 1995-04-20 | Beloit Technologies, Inc. | Impulse dryer roll with shell of high thermal diffusivity |
-
2002
- 2002-12-21 DE DE2002160509 patent/DE10260509A1/de not_active Withdrawn
-
2003
- 2003-12-18 AU AU2003299254A patent/AU2003299254A1/en not_active Abandoned
- 2003-12-18 JP JP2004561507A patent/JP4656946B2/ja not_active Expired - Fee Related
- 2003-12-18 EP EP03799587A patent/EP1585859A2/de not_active Withdrawn
- 2003-12-18 WO PCT/EP2003/051048 patent/WO2004057103A2/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2004057103A2 * |
Also Published As
Publication number | Publication date |
---|---|
AU2003299254A1 (en) | 2004-07-14 |
WO2004057103A2 (de) | 2004-07-08 |
WO2004057103A3 (de) | 2005-12-08 |
JP2006512555A (ja) | 2006-04-13 |
DE10260509A1 (de) | 2004-07-01 |
JP4656946B2 (ja) | 2011-03-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
|
PUAK | Availability of information related to the publication of the international search report |
Free format text: ORIGINAL CODE: 0009015 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: D21F 5/02 20060101AFI20051215BHEP |
|
DAX | Request for extension of the european patent (deleted) | ||
17P | Request for examination filed |
Effective date: 20060608 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: VOITH PATENT GMBH |
|
17Q | First examination report despatched |
Effective date: 20071009 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20110507 |