FI90263C

FI90263C - Långzonspress

Info

Publication number: FI90263C
Application number: FI910660A
Authority: FI
Inventors: Seppo Haavisto
Original assignee: Tampella Papertech Oy
Priority date: 1991-02-11
Filing date: 1991-02-11
Publication date: 1994-01-10
Also published as: FI90263B; FI910660A0; FI910660A

Description

1 902631 90263

PitkåvytthykepuristinPitkåvytthykepuristin

KeksinnOn kohteena on pitkåvyOhykepuristin paperi-koneen tai vastaavan puristinosaa vårten, jossa on si tå 5 vasten painautuvan telan kanssa pidennetyn puristinvyOhyk-keen muodostava liukukenkå, sitå pitkin liukuva suljetun silmukan liukukengån ympåri muodostava liukunauha, runko, jonka ympåri liukunauha kiertåå ja rungon påisså kehåltaån ympyrånmuotoiset liukunauhan pååtylaipat.The invention relates to a sliding shoe forming a sling shoe with a sliding shoe forming an elongate sliding shoe of a closed machine with a paper machine or a similar pressing part having an elongated press belt section with a roll pressed against it. pååtylaipat.

10 PitkåvyOhykepuristimia on kehitetty, jotta måråstå kuiturainasta saataisiin vedenpoistoa tehostetuksi ja ve-denpoistoon vaikuttava puristuspainekuvio puristusvyOhyk-keen pituudella halutunlaiseksi. Nåisså ratkaisuissa on kåytetty koveraa liukukenkåå, joka on painettu vastaavalla 15 kohdalla olevaa vastatelaa vasten ja liukukengån ja telan vålisså on kåytetty liukunauhaa, jolloin liukunauhan ja liukukengån våliin on syOtetty voiteluainetta. Liukunauha, joka muodostaa suljetun silmukan, on erilaisilla tavoilla ohjattu kulkemaan liukukengån ympåri. Tållaiset ratkaisut 20 ovat tunnettuja mm. US-julkaisuista 4,570,314, RE.31,923, DE-julkaisuista 30 30 233 C2, 32 39 954 Al, 35 03 373 Al.10 Longitudinal thinning presses have been developed in order to make the dewatering of a wet fibrous web more efficient and to make the compression pressure pattern affecting the dewatering along the length of the pressing zone as desired. These solutions use a concave sliding shoe pressed against the counter roll at the corresponding point 15 and a sliding belt is used between the sliding shoe and the roll, whereby a lubricant is fed between the sliding belt and the sliding shoe. The sliding belt, which forms a closed loop, is guided in various ways to pass around the sliding shoe. Such solutions 20 are known e.g. U.S. Patent Nos. 4,570,314, RE.31,923, DE 30 30 233 C2, 32 39 954 A1, 35 03 373 A1.

Nåisså tunnetuissa ratkaisuissa on liukukenkå eril-linen irrallinen osa, jonka asento on tavallisesti såådet-tåvisså liukukenkåå tukevaan runkoon nåhden. Ongelmana on, 25 ettå liukunauha joutuu taipumaan jyrkåsti erityisesti liukukengån reunojen kohdalla. Tåmå, vaikkakaan ei estå ra-kenteen kåyttttå, rajoittaa liukunauhaan kåytettåvien mate-riaalien laatua. KåytånnOsså tunnettujen ratkaisujen liu-kunauhoissa voidaan kåyttåå låhinnå erilaisia kumi- ja 30 muovimateriaaleja, jotka keståvåt jyrkkiåkin taivutuksia, mutta joiden venymå-, kokoonpuristumis- yms. ominaisuudet eivåt vålttåmåttå ole parhaita mahdollisia tåhån tarkoi-tukseen.These known solutions have a separate detachable part of the slipper, the position of which is usually radiant with respect to the frame supporting the slipper. The problem is that the sliding belt has to bend sharply, especially at the edges of the sliding shoe. This, while not precluding the use of the structure, limits the quality of the materials used on the conveyor belt. In practice, various rubber and plastic materials can be used in the Liu belt of the solutions known in the art, which can withstand even sharp bends, but whose elongation, compression, etc. properties are not necessarily the best possible.

Tåmån keksinnOn tarkoituksena on saada aikaan sel-35 lainen pitkåvydhykepuristin, jossa ei ole edellå mainittu- 2 90263 ja haittapuolia ja jossa liukunauha saadaan kulkemaan joustavasti ilman jyrkkia kulmia tai muita haittavaikutuk-sia. KeksinnOn mukaiselle pitkavyOhykepuristimelle on omi-naista, etta liukukenkå ja runko muodostavat puristus-5 vydhykkeelia ja sen vaiittGmassa laheisyydessa liukunauhan liikesuunnassa olennaisesti yhtenaisen jouhevasti kaartu-van liukupinnan, jota pitkin liukunauha liukuu ja etta rungon ja telan yhdesså liukunauhalle maaraama muoto liukunauhan pyOrimissuunnassa on lahelld paatylaippojen ympy-10 rånmuotoista kehaa, josta muoto poikkeaa olennaisesti vain puristusvyohykkeelia ja sen valittOmassa laheisyydessa koveran liukukengån vuoksi seké tarvittaessa liukunauhan irtoamisalueella liukunauhan saatOvaran takia.It is an object of the present invention to provide a long-jet press which does not have the above-mentioned disadvantages and in which the conveyor belt is made to run flexibly without steep angles or other side effects. The long belt press according to the invention is characterized in that the slipper and the body form a compression zone and, in its proximity, in the direction of movement of the conveyor belt -10 round-shaped circumferences, from which the shape differs substantially only in the compression zone and in its chosen proximity due to the concave sliding shoe and, if necessary, in the area of the sliding belt detachment due to the sliding belt.

Keksinnon olennainen ajatus on, etta liukukenka ja 15 liukunauhaa ohjaava ohjausvaippa on muodostettu yhdeksi yhtenaiseksi rungoksi siten, etta liukunauha rungon ympari pydriessaan koko ajan voi liikkua joustavasti kaarevia pintoja pitkin ilman olennaisia katkoksia pintarakenteessa tai akillisia kulmia tai kulmamuutoksia. KeksinnGn mukai-20 sen ratkaisun avulla voidaan kayttaa jopa hyvin jaykkia nauhamateriaaleja kuten terasta, kovia muovilaatuja tai muuta vastaavaa, joilla on hyva kestavyys kulutusta, vetoa ja lampisa vastaan seka hyvat kitkaominaisuudet ja jotka eivat olennaisesti veny pituus- tai poikkisuunnassa kaytOn 25 aikana.The essential idea of the invention is that the sliding shoe and the guide sheath guiding the sliding belt 15 are formed as a single unitary frame so that the sliding belt can move flexibly along curved surfaces without substantial breaks in the surface structure or acute angles or angular changes. The solution according to the invention makes it possible to use even very rigid strip materials, such as steel, hard plastics or the like, which have good resistance to wear, tension and pond as well as good friction properties and which do not substantially stretch longitudinally or transversely during use.

Keksintoa selostetaan lahemmin oheisissa piirustuk-sissa, joissa kuvio 1 esittaa kaavamaisesti keksinnOn mukaisen puristimen runkorakenteen poikkileikkausta, 30 kuvio 2 esittaa kaavamaisesti keksinnOn mukaisen pitkavytthykepuristimen toiminnallista toteutusta poikki-leikattuna ja kuvio 3 esittaa kuvion 2 mukaista ratkaisua osit-tain pituussuuntaisesti leikattuna.The invention will be described in more detail in the accompanying drawings, in which Fig. 1 schematically shows a cross-section of the frame structure of a press according to the invention, Fig.

35 Kuviossa 1 on esitetty kaavamaisesti poikkileik-35 Figure 1 is a schematic cross-sectional view

IIII

3 90263 kauksena keksinnGn mukaisen pitkavyGhykepuristimen runko 1. Rungon 1 perusmuotona on pisteen PI ympåri sSteellå RI piirretty ympyrakeha, joka on merkitty rungon 1 ympårille katkoviivalla, ja joka on suunnilleen puristimen liu-5 kunauhan paatylaippojen ulkokeha. Rungon muoto noudattaa laheisesti tata ympyraa, silia taten liukunauhan muodon-muutokset puristimen aktiivisen kenkåosan ja liukunauhan paatylaippojen vaiilia jaavat mahdollisimman pieniksi. Oleellista muodossa on, etta runko on muotoiltu siten, 10 etta vaipan kaarevuussateet eivat alita missåån kohdassa annettuja arvoja. Tama tarkoittaa kaytannGssa sita, ettå liukunauhan ja rungon valiset kosketusalueet on pyGristet-tava naiden kaarevuussateiden mukaan. Liukunauhaan koske-mattomat alueet voidaan tietenkin muotoilla vapaasti tassa 15 suhteessa. Liukunauha on edullista tukea suurelta osalta kehaansa, mutta ei aivan koko kehaitaan, vaan on suositel-tavaa jattaa liukunauha irti kehasta sallittujen pyGris-tysten rajoittaman sisaanvedon K2 avulla, jolloin liukunauhan pituusmuutokset esim. lampOtilojen takia paasevat 20 paremmin tasaantumaan vapaan osan muodonmuutoksiin. Rungon pinta niilia alueilla, jotka eivat ole puristusvyOhykkeel-la, voi olla muodostettu myOs listoista, joiden vaiissa on raot. Listojen muoto ja sijoittelu tulee olla sellainen, etta liukunauhan pienin sallittu taivutussade ei alitu. 25 Tata on varottava erityisesti puristusvyGhykkeen vaiittO-massa laheisyydessa. Tyypillisesti rungossa on sivuilla keskipitkat kaarevuussateet, niista kenkaan pain ja samoin vastapuolella on pienemman kaarevuussateen alueet. Kengan lahelia kaarevuussade muuttaa suuntaa ja kengan alue on 30 kovera. Kengan vastakkaisella puolella on alue, jolla liukunauha ei kosketa runkoa, tama alue on edullista tehda suurella taivutussateelia, suoraksi tai perati koveraksi. Muotoilun tarkoituksena on liukunauhan jyrkkien mutkien valttaminen. TailGin liukunauhamateriaalina voidaan kayt-35 taa terasta, muuta sopivaa metallia, erilaisia kovia muo- 4 90263 vi- tai kumilaatuja ja naiden yhdistelmia ilman, etta liu-kunauha murtuu pitkaaikaisen rasituksen vaikutuksesta. Ku-viossa ei esitetty liukunauha kulkee påasaantOisesti pit-kin rungon 1 pintaa, mutta se on pituudeltaan sellainen, 5 etta se ei muodosta kiristavaa rengasta rungon 1 ymparil-le, vaan rungon 1 alaosassa olennaisesti noin K2 mittai-sella matkalla liukunauha irtoaa rungon 1 pinnasta, jotta silia olisi valjyytta liukua vapaasti runkoa 1 pitkin. Voiteluaine liukunauhan ja rungon 1 valilia voidaan tai-10 Ιόΐη syOttaa mainittuun vaiiin ja siten varmistaa osa liukunauhan ja rungon 1 vaiisesta voitelusta. Varsinainen pitkavyOhykepuristimen alue on rungon yiaosassa pisteesta P3 sateelia R3 muodostettu ulospain kovera pisteesta P3 katsoen kulman γ suuruisella alueella oleva liukupintaan 15 kuuluva liukukenka 2, joka muodostaa varsinaisen puristus-vyGhykkeen PV sen kohdalle painautuvan pistekatkoviivalla merkityn telan 3 kanssa.The body 1 of the longitudinal press according to the invention is in the basic shape of the body 1. A circle is drawn around the point PI on the circle RI, which is marked around the body 1 by a broken line and which is approximately on the outer flange end flanges of the press Liu-5. The shape of the body closely follows the tata circle, the deformations of the Silia tate conveyor belt keep the gaps between the active shoe part of the press and the end flanges of the conveyor belt as small as possible. It is essential in the form that the body is shaped so that the curvature of the casing does not fall below the values given at any point. In practice, this means that the contact areas between the conveyor belt and the frame must be rounded according to the curvature of the curves. The areas not in contact with the conveyor belt can, of course, be freely shaped in this ratio. It is advantageous to support the conveyor belt for a large part of its circumference, but not its entire circumference, but it is recommended to leave the conveyor belt out of the circumference by the allowable retraction K2, so that changes in the length of the conveyor belt, e.g. The surface of the body in the nile areas which are not in the compression zone may be formed by myOs strips with slits in the stems. The shape and arrangement of the strips must be such that the minimum permissible bending rain of the conveyor belt is not exceeded. 25 Particular care must be taken in the vicinity of the silence of the compression zone. Typically, the hull has medium-long curves of curvature on the sides, of which no one pains and likewise the areas of lower curvature rain on the opposite side. The shoulder curvature of the shoe changes direction and the shoe area is 30 concave. On the opposite side of the shoe there is an area where the sliding belt does not touch the body, this area is preferably made with a large bending rain, straight or even concave. The purpose of the design is to avoid sharp bends in the conveyor belt. Steel, other suitable metal, various hard molds or rubber combinations, and combinations thereof can be used as TailG's conveyor belt material without the Liu conveyor belt breaking under long-term stress. The conveyor belt not shown in the figure runs mainly along the surface of the body 1, but is of such a length that it does not form a tightening ring around the body 1, but in the lower part of the body 1 the strip slides off the surface of the body 1 so that Silia would have the courage to slide freely along the body 1. The lubricant of the conveyor of the conveyor belt and the body 1 can be fed to said pile and thus ensure part of the silent lubrication of the conveyor belt and the body 1. The actual area of the long belt is an outlet concave in the yia part of the body formed from the point P3 by the rain R3, the slider 2 belonging to the sliding surface 15 in the area of the angle γ from the point P3, which forms the actual compression zone PV with a dotted line 3

Kuviossa 2 puolestaan on esitetty kaavamaisesti keksinnOn mukaisen puristimen rungon toiminnallinen raken-20 ne. Runko 1 on tukeva, poikkileikkaukseltaan periaatteessa kuvion 1 mukainen lahinna munuaista, muistuttava runkokap-pale, jonka ymparilia liukunauha 5 kulkee. Rungon 1 sisa-puolella on erillinen sisarunko 6, joka on kiinnitetty paperikoneen runkorakenteeseen molemmista paistaan. Run-25 koon 1 on kiinnitetty kuormitusmannat 7, jotka sijaitsevat sisarunkoon 6 muodostetuissa sylintereissa. Puristimen kuormituksen aikaansaamiseksi sylintereihin johdetaan hyd-raulinestetta tai vetta niin, etta sen aikaansaama paine tyflntaa runkoa 1 ja liukunauhaa 5 sisarungon suhteen ylOs-30 pain kohti vastatelaa 3, joka on laakeroitu paperikoneen puristinosan runkorakenteeseen. Telan 3 ja liukunauhan 5 vaiista kulkee tyypillisesti kaksi puristinhuopaa 8, joi-den vaiissa kuivattava raina 9 johdetaan puristinpidikkeen lapi. Naiden johtaminen ja siihen liittyvat rakenteet seka 35 muu tekniikka on sinansa yleisesti tunnettua ja alan amli 5 90263 mattimiehelle ilmeista ja itsestaan selvaa eika niita tas-sa sen vuoksi tarkemmin seliteta.Figure 2, in turn, schematically shows the functional structure of the press body according to the invention. The body 1 is a sturdy body, substantially in cross-section, substantially resembling a kidney according to Figure 1, around which a conveyor belt 5 runs. On the inside of the body 1 there is a separate sister body 6 which is attached to the frame structure of the paper machine from both sides. Attached to the size 1 of the run-25 are load handles 7 located in cylinders formed in the sister body 6. In order to load the press, a hydraulic fluid or water is introduced into the cylinders so that the pressure exerted by it presses the body 1 and the conveyor belt 5 relative to the sister body towards the counter roll 3 mounted on the frame structure of the press section of the paper machine. The press 3 of the roll 3 and the conveyor belt 5 are typically provided with two press felts 8, in the groove of which the web 9 to be dried is guided through the press holder. The management of women and related structures, as well as other techniques, are well known in the art and will be apparent and obvious to those skilled in the art and will therefore not be further described.

Kuviossa 3 on esitetty kuvion 2 mukaisen puristimen osittainen pituussuuntainen leikkaus, jossa nakyy, kuinka 5 sisarunko 6 kulkee rungon 1 lapi. Rungon 1 ja sisarungon 6 vaiilia on useita hydraulisylintereita 7 puristimen pi-tuussuunnassa. Naiden sylintereiden avulla saadetaan pu-ristuspaineen suuruus ja jakautuma koneen poikkisuunnassa. Tdman lisaksi puristimen rungon ja vastatelan sijainti 10 voivat olla saadettavat. Tailainen hydraulisylintereiden tal kuormitussylintereiden kayttO sinansa on alan ammatti-miehelle yleisesti tunnettua ja itsestaan selvaa esimer-kiksi aiemmin mainittujen julkaisuiden perusteella eika sita sen vuoksi tassa tarkemmin selviteta.Fig. 3 shows a partial longitudinal section of the press according to Fig. 2, showing how the sister body 6 passes through the body 1. The valves of the body 1 and the sister body 6 have a plurality of hydraulic cylinders 7 in the longitudinal direction of the press. These cylinders provide the magnitude and distribution of the compression pressure in the cross-machine direction. In addition to this, the location 10 of the press body and the counter roll may be available. Such use of hydraulic cylinder load cylinders is generally known to the person skilled in the art and is self-evident, for example on the basis of the previously mentioned publications, and will therefore not be explained in more detail here.

15 vasymyslujuuden kannalta kriittinen vaipan taivu- tussåde on esimerkiksi 1 mm paksuisella ruostumattomalla terasnauhalla noin 1000 mm. Tama saadaan yleisesti tunne-tusta nyrkkisaanndJsta, jonka mukaan suositeltava taivutus-sade D on suurempi kuin 1000 x t, jossa t on materiaalin 20 paksuus, jolloin jokainen kuvioon 1 merkitty taivutussade RI, R2, R3 tai jokin niiden vaiiselia alueella oleva taivutussade on vahintaan taman suuruinen. On olemassa teras-materiaaleja, jotka lujuusarvojensa puolesta sallivat kayttaa 1 mm nauhalla jopa sellaista taivutussadetta, kuin 25 250 mm, mika on kuitenkin teoreettinen aariarvo. Aa- riolosuhteissa, varsinkin silloin, kun on kyse suurista vaikuttavista voimista, tailainen nauha on herkka hitsaus-virheille ja koloille tai halkeamille, jolloin lujuusopis-sa tunnettu lovivaikutus saattaa aiheuttaa vaurioita. 30 Naissa oloissa tietenkin pyritaan vaittamaan aarimmaisia taivutussateita ja taivutussateena kaytetaan teoreettista aariarvoa suurempia arvoja. Vaikka kuvioissa runko 1 onkin esitetty tåysin yhtenaisena katkeamattomana, voi rungon 1 ja puristinkengan valissa olla rako vaikka puristinkengan 35 2 molemmin puolin, kunhan nauha voi joustavasti kulkea 6 90263 rakojen yli pinnalta toiselle ilman akillista kulmaa tai sen pintaan vaikuttavaa voimaa. TailOin voidaan varsinai-nen puristinvydhykkeen osa eli puristinkenka konstruoida muusta rungosta eriliaan ja se voidaan tarvittaessa vaih-5 taa toiseen tai toisen muotoiseen halutun puristusvydhyk-keen painekuvion aikaansaamiseksi. Samoin voi rungossa 1 olla rakoja tai reikia voiteluaineen syOttamiseksi liuku-nauhan ja rungon 1 vaiiin samoin kuin puristinkengan ja rungon valisesta raosta sydttaa voiteluainetta liukunauhan 10 ja puristusvyfihykkeen vaiiin.The bending radius of the jacket, which is critical for the tensile strength, is, for example, about 1000 mm with a 1 mm thick stainless steel strip. This is obtained from the generally known fist yield, according to which the recommended bending rain D is greater than 1000 xt, where t is the thickness of the material 20, whereby each bending rain RI, R2, R3 or one of their bending rain bends in Fig. 1 is at least equal to . There are steel materials which, because of their strength values, allow the use of a bending rain such as 25 250 mm on a 1 mm strip, which is, however, a theoretical aria value. In extreme conditions, especially in the case of large acting forces, the strip is susceptible to welding defects and cavities or cracks, in which case the notch effect known in the strength theory may cause damage. 30 In these conditions, of course, efforts are made to silence the most armed bending rains, and values higher than the theoretical arable value are used as the bending rain. Although the body 1 is shown completely unbroken in the figures, there may be a gap between the body 1 and the press shoe even on both sides of the press shoe 35 2, as long as the strip can flexibly pass over 6 90263 slots from one surface to another without an acute angle or force acting on its surface. In this way, the actual part of the press zone, i.e. the press shoe, can be constructed differently from the rest of the body and can, if necessary, be changed to another or another shape in order to obtain the pressure pattern of the desired press zone. Likewise, the body 1 may have slots or holes for supplying lubricant to the slides of the conveyor belt and the body 1, as well as a slit between the press shoe and the body to inject lubricant into the slides of the conveyor belt 10 and the compression zone.

Rungon 1 valmistamisessa on otettava huomioon se, etta pinnan oikea muoto ja erityisesti sen laatu sekå si-leys puristusalueella on tarkea. Runko voidaan tehda useilla eri tavoilla, kuten hitsaamalla se taivutetuista 15 levyista kiinni erilliseen tukirunkoon, jolloin lopullinen pinnan tarkkuus ja muoto valmistetaan joko lastuavalla tyttstOlia tai hiomalla. Edelleen voidaan runko valmistaa paksusta tukevasta materiaalista, jolloin irtorunkoa ei tarvita. Edelleen hyvin kiillotetun ja tasaisen pinnan 20 sijasta voidaan pinta tydstaa sopivan muotoiseksi ja jat-tåå se karheaksi, jolloin pinta paallystetaan varsinaista liukumista vårten paremmin sopivalla sileåpintaisella ma-teriaalilla kuten pronssi- tai polyamidilevylia tai vas-taavalla. TSlldin pinnoitelevy voidaan kiinnittaa liimaa-25 malla, niittaamalla, ruuvaamalla tai jollakin muulla sopivalla tavalla kuten vaikka laser- tai plasmaliitoksella seka tietenkin naiden tapojen yhdistelmilia. Pronssin si-jaan kay jokin muu sopiva metalli ja polyamidin sijaan vastaavasti jokin muu sopiva muovilaatu, joka kestaa seka 30 lammdn etta puristuksen riittavasti. Puristinkenka voi olla erillinen, jolloin se kiinnitetaan runkoon 1 sinansa tunnetulla tavalla.In the manufacture of the body 1, it must be taken into account that the correct shape of the surface and in particular its quality and the si-Leys compression range are important. The body can be made in a number of different ways, such as by welding it from the bent plates onto a separate support body, whereby the final surface accuracy and shape is produced either by cutting the filler or by grinding. Furthermore, the body can be made of a thick supporting material, in which case a loose body is not required. Furthermore, instead of a well-polished and flat surface 20, the surface can be filled to a suitable shape and kept rough, whereby the surface is baled with a suitable smooth-surfaced material such as bronze or polyamide sheet or the like for the actual sliding. The TSlld coating plate can be attached by gluing, riveting, screwing or any other suitable means, such as a laser or plasma connection and, of course, combinations of these methods. Instead of bronze, Kay has another suitable metal and, instead of polyamide, some other suitable plastic grade, which can withstand both 30 lammdn and compression sufficiently. The press shoe may be separate, in which case it is attached to the body 1 in a manner known per se.

Liukunauha voidaan tarvittaessa tukea erillisilia tukikengilia tai rullilla, joita kuviossa 2 on kaavamai-35 sesti merkitty numerolla 10. Niiden kiinnitys on edulli-If necessary, the conveyor belt can be supported by separate support shoes or by rollers, which are schematically indicated in Fig. 2 by the number 10. They are preferably fastened.

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7 90263 sesti joustava ja v&rShtelyjS hyvin vaimentava. TailOin voidaan kayttaa pneumaattisia tai hydraulisia kuormi-tuselimia tai kumia tai muuta vastaavaa joustavaa elasto-raeeriå tukien asentamiseen. Tuet sinansa eivat ole vaitta-5 mattOmia mikali liukunauhan tukematon osuus pysyy rungon 1 alla lyhyena.7 90263 very flexible and very damping. TailOin can be used with pneumatic or hydraulic loading members or rubber or other similar flexible elastomeric supports to install the supports. The supports themselves are not silent-5 mats if the unsupported portion of the conveyor belt remains short under the frame 1.

Vaikka kuvioissa 2 ja 3 on esitetty taipumakompen-soitu runkorakenne, joka on keksinniin toteutuksen kannalta edullinen, ei tama sinansa ole vaittamatOn, vaan runko voi 10 olla rakennettu myOs mahdollisimman jaykaksi ilman taipu-makompensointia. TailOin on myOs mahdollista toteuttaa ratkaisu niin, etta runko 1 ja siten myOs liukukenka ovat ilman kuormitusta telaan pain kuperasti kaartuvia, jolloin ne oikenevat telan aikaansaaman kuormituksen vaikutukses-15 ta. Paineen suuruuden ja jakauman saatd on tailaisessa ratkaisussa paras tehda koko runkoa siirtamaiia ja kierta-mailå. Tietenkin myOs vastatelan sijaintia voidaan saataa samassa tarkoituksessa. Koska lanundlia on suuri vaikutus puristimen tehoon, voidaan liukunauha keksinnOn mukaisessa 20 ratkaisussa lammittaa tehokkaasti kayttamaiia apuna rungon lammitysta, jolloin lampO siirtyy voiteluaineen vaiityk-selia liukunauhaan koko rungon ja liukunauhan vaiiselia pituudella ja liukunauha pysyy jatkuvasti kuumana.Although Figures 2 and 3 show a deflection-compensated frame structure which is advantageous for the implementation of the invention, this is not in itself indispensable, but the frame can be constructed as rigid as possible without deflection compensation. It is also possible to implement the solution in such a way that the body 1 and thus the slipper of the myOs are convexly curved without loading on the roll, whereby they are rectified by the load caused by the roll. In the case of a Thai solution, it is best to make the whole body from the transfer countries and the rotary beam. Of course, the location of the myOs counter roll can be obtained for the same purpose. Since lanundl has a great effect on the performance of the press, the conveyor belt in the solution 20 according to the invention can be efficiently heated by heating the body, whereby the lubricant moves from the lubricant to the entire length of the body and the conveyor belt and the conveyor belt remains hot.

Edelia selityksessa ja piirustuksissa on keksintoa 25 selostettu vain esimerkinomaisesti eika sita ole miliaan tavalla rajoitettu siihen.In the foregoing description and drawings, the invention 25 has been described by way of example only and is not limited thereto.

Claims

A long belt press for a paper machine or a similar press section having a sliding shoe (2) forming an extended press zone (PV) with a roll (3) pressing against it, sliding along the sliding shoe (2) of the closed loop sliding shoe (2) , a body (1) around which the conveyor belt (5) rotates and circular flanges of the conveyor belt (5) are circumferentially circumferentially in the body of the body (1), characterized in that the slipper (2) and the body (1) form a compression zone in the vicinity of the sliding belt (5) in the direction of movement of the conveyor belt (5) a substantially uniform smoothly curved sliding surface along which the conveyor belt (5) slides and that the body (1) and 15 rollers from which the shape differs substantially only in the compression zone (PV) and in its silence due to the concave sliding shoe (2) and, if necessary, in the release area of the 20 sliding belts (5) a (K2) due to the availability of the conveyor belt (5).

Longitudinal belt press according to Claim 1, characterized in that the curvature of the conveyor belt (5) is at least 150 times the thickness of the conveyor belt (5) over its entire travel direction in its direction of movement.

Long belt press according to Claim 1 or 2, characterized in that the sliding shoe (2) is fixedly part of the surface formed in the body (1).

Long-throw press according to one of Claims 1 to 3, characterized in that the conveyor belt (5) is longer than the length of the surface in the direction of movement of the conveyor belt (5) of the body (1), so that the conveyor belt (5) is a short distance from the body. ) on the opposite side of the two frames (1).

Longitudinal gutter according to one of the preceding claims, characterized in that the body (1) has a cross-section such that its sides (K1) are in the shape of a substantially arcuate (Ri) circular arc, the lower part of the body (1) being of said circumference. -5 from an arcuate arc to its center (PI) that the compression zone (PV) is a concave zone from said circular arc to its center (PI) and that the surface of the body (1) leading from said compression zone (PV) to said sides is from said 10 a surface arcuately connected to the sliding surface of the compression zone (PV) by a circular arc.

Longitudinal press according to one of the preceding claims, characterized in that part of the surface of the body (1) facing the conveyor belt (5) is formed by strips with gaps between them.

Longitudinal press according to one of the preceding claims, characterized in that the outer surface of the body (1) is larger than average in bending rain relative to the curvature of the outer surface of the body (1) in the release zone (K2) of the conveyor belt (5) and the body (1).

Long-jet press according to one of the preceding claims, characterized in that the pressure distribution of the press in the direction of movement of the track is caused by rotating the body about its longitudinal axis.

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Long-jet press according to one of the preceding claims, characterized in that the magnitude of the pressure of the press is transferred from the outer body of the press to the sister body.

Longitudinal zone press 30 according to one of the preceding claims, characterized in that the magnitude of the pressure of the press is obtained by transferring the earth from the entire press to the roll.

Long-zone press according to one of the preceding claims, characterized in that the screen 35 is a heating means for heating the press. 10 90263