SE179360C1

SE179360C1 -

Info

Publication number: SE179360C1
Authority: SE
Publication date: 1962-01-01

Description

Uppfinnare: B F H Mellbin F8religgande uppfinning hanfor sig till en anordning for drift av en grupp i sicksack placerade torkvalsar avsedda for torkning av en darover lopande bana av textilmaterial, foretradesvis tyg. Allteftersom materialet torkas vid gingen over dessa valsar, forandras dess langd, vanligen s. att detsamma krymper: Torkvalsarna mftste darfar drivas med olika periferihastighet, enar banan eljest skulle utsattas f8r skadliga strackningspakanningar. Idealet yore att torkvalsarna kunde driva banan med sinsemellan lika stora krafter, men detta kraver alltfor komplicerade drivanordningar. Syftet med uppfinningen Or att astadkomma en konstruktivt enkel drivanordning, vid vilken banans genom torkningen skeende krympning eller forlangning kompenseras genom att valsarna drivas olika hastigt med hjalp av elastiskt lanjbara remmar Over vilka valsarna drivas individuellt. Anordningen enligt uppfinningen, som mojliggor en sh.dan gemensam och elastisk drift, kannetecknas vdsentligen darav, att var och en av valsarna pa sin ena lagertapp uppbar dais en darpa. fritt lagrad trissa, dels en med lagertappen fast forenad trissa, att en av en primar drivaxel driven rem eller kedja loper Over de i sicksack placerade fritt lagrade trissorna ph samtliga torkvalsar och att fOr vane vals den fritt lagrade trissan är kopplad med den fasta trissan genom fOrmedling av tva parallellt lopande remmar, som Oro spanda mellan var sin av sistnamnda trissor och en fritt roterande trissa vilken Or lagrad ph en med namnda tapp parallell, pa stativet fastsatt axeltapp, och av vilka remmar atminstone den ena pA i och for sig kant satt är elastiskt tanjbar, sa att den med valstappen fast f8renade trissan drives med en mot valsens drivmoment svarande efterslapning I forhallande till den ph valstappen fritt roterande, prirnart drivna trissan. Inventor: B F H Mellbin The present invention relates to a device for operating a group of zigzagging drying rollers intended for drying a web of textile material extending thereover, preferably fabric. As the material dries when passing over these rollers, its length changes, usually so that it shrinks: The drying rollers must be operated at different peripheral speeds, otherwise the web would otherwise be subject to harmful stretching pans. The ideal is that the drying rollers could drive the web with equal forces, but this requires too complicated driving devices. The object of the invention is to provide a constructively simple drive device, in which the shrinkage or elongation of the web caused by the drying is compensated by the rollers being driven at different speeds by means of elastically expandable belts over which the rollers are driven individually. The device according to the invention, which enables such a common and elastic operation, can essentially be characterized in that each of the rollers on its one bearing pin then bears a drop. freely mounted pulley, partly a pulley fixedly connected to the bearing pin, that a belt or chain driven by a primary drive shaft runs over the freely stored pulleys placed in zigzag ph all drying rollers and that for customary rolling the freely mounted pulley is connected to the fixed pulley through Arrangement of two parallel running belts, which Oro span between each of the latter pulleys and a freely rotating pulley which is mounted on a shaft pin parallel to said pin, mounted on the stand, and of which belts at least one pA per se is set. is elastically extensible, so that the pulley fixedly fastened to the roller pin is driven with a lag corresponding to the driving moment of the roller in relation to the free-rotating, pre-drivenly driven pulley.

I den sh definierade nya anordningen inghr anvandning av elastiskt tanjbara remmar sh som ett kannetecken, vilket i och for sig Or redan kant vid drift av textilbanor, t. ex. genom svenska patenten 138 558 och 152 405. The new device defined in sh involves the use of elastically stretchable belts sh as a pitcher, which in itself is already an edge in the operation of textile webs, e.g. through Swedish patents 138,558 and 152,405.

En textiltorkningsanlaggning, vid vilken uppfinningen tillampas, skall nedan beskrivas narmare under hanvisning till bifogade schematiska ritning, varh fig. 1 Or en sidovy och fig. 2 Or en sektion tagen efter linjen IIi fig. 1. A textile drying plant to which the invention is applied will be described in more detail below with reference to the accompanying schematic drawing, in which Fig. 1 is a side view and Fig. 2 is a section taken along the line II in Fig. 1.

Den ph. ritningen visade torkningsanlaggningen bestar i start sett av ett antal hodsontella. torkvalsar 11, vilka Or anordnade tatt intill varandra I tva. rader, varvid valsarna den ena raden ligga mitt for mellanrummen mellan valsarna i den andra raden. Den textilbana 13, som skall torkas, Or dragen i sicksack Over dessa valsar, sh att desamma omslutas darav Over storre delen av sin periferi. Torkvalsarna 11 utgoras av ihaliga cylindriska trummor, som Oro fyllda med hnga. Ph. valsarna Oro fasta axeltappar 15, som medelst kullager 17 Oro lagrade i en del 19 av maskinens stativ. Den ena (ph ritningen icke visade) axeltappen Or genomborrad och tjanar for tillledning av anga till valsens inre och bortledning av kondensat. Denna axeltapp samverkar med en stillasthende packbox, som sakerstaller tatningen, sO att anga inuti torkvalsen kan h011as vid overtryck. Den motsatta lagringstappen 15, som visas i fig. 2, tjanar for drivning av valsen. En trissa 23 Or medelst ett kullager 21 lagrad pa tappen 15 och vidare Or en trissa 25 fast forenad med densamma. Ett stycke vid sidan av lagringstappen 15 Or i stativet fastsatt en tapp 27, som uppbar en me-deist ett kullager 29 lagrad trissa 31. En rem 33 lOper Over trissorna 25 och 31, vilka lampligen Oro forsedda med spar for att styra rem-men. En annan, med den forstnamnda parallellt lopande rem 35 Or lagd Over trissorna 23 och 31 och styres av spar i dessa trissors periferi. En del av trissan 23 Or utbildad som en remskiva for en drivrem 36, som drives av en 2— — pa den primara drivaxeln 37 fastsatt remskiva 39 och som i sicksack och pa samma vag som textilbanan 13 Riper i tur och ordning over de fritt roterande trissorna 23 pa samtliga torkvalsar och vander over en brytrulle 41. Pei axeln 37 Sr vidare fastsatt en kilrepskiva 43 med foranderlig delningsdiameter, som me-deist ett kilrep 45 driver en kilrepskiva 47. Denna fir fast forenad med en vals 49, som driver textilbanan titan sliming. The ph. the drawing shown the drying plant consists initially of a number of hodsontella. drying rollers 11, which Or arranged arranged next to each other in two. rows, the rollers one row being opposite the gaps between the rollers in the other row. The textile web 13 to be dried is zigzagged over these rollers, the same being enclosed therewith over most of its periphery. The drying rollers 11 consist of hollow cylindrical drums, which are filled with hinge. Ph. the rollers Oro fixed shaft pins 15, which by means of ball bearings 17 Oro are mounted in a part 19 of the machine stand. The one (ph drawing not shown) shaft pin Or is drilled and serves to feed anga to the interior of the roller and drain off condensate. This shaft journal cooperates with a stationary stuffing box, which secures the seal, so that it can be inserted inside the drying roller when it is overpressure. The opposite bearing pin 15, shown in Fig. 2, serves to drive the roller. A pulley 23 is by means of a ball bearing 21 mounted on the pin 15 and furthermore a pulley 25 is fixedly connected thereto. A piece 27 attached to the bearing pin 15 Or in the frame is mounted on a pin 27, which carried a pulley 31 mounted in a ball bearing 29. A belt 33 runs over the pulleys 25 and 31, which are suitably provided with grooves for guiding the belt. . Another, with the first-mentioned parallel running belt 35 Or laid over the pulleys 23 and 31 and guided by grooves in the periphery of these pulleys. A part of the pulley 23 is formed as a pulley for a drive belt 36, which is driven by a pulley 39 attached to the primary drive shaft 37 and which in a zigzag and on the same path as the textile web 13 scratches in turn over the freely rotating The pulleys 23 on all the drying rollers and wander over a break roller 41. On the shaft 37 a wedge pulley 43 with variable pitch diameter is further attached, which by means of a wedge rope 45 drives a wedge pulley 47. This is fixedly connected to a roller 49, which drives the textile web titanium. sliming.

Remmarna 33 och 35 eller ettminstone den ena av dem Sr elastiskt tiijbar och bestar t. ex. av en spiralfjader eller ett gummiband. I drift kommer darfor remmens ena part att strackas mera an den andra parten, vilket medfor att omsattningsforhallandet blir nagot mindre an vad som svarar mot diametrarna av sparen i de medelst remmen kopplade trissorna. Den rotation, som trissan 23 bibringas medeIst drivremmen 36, overfores medelst remmen 35 till trissan 31 och fran namnda trissa medelst remmen 33 tillbaka till den pa torkvalsens axeltapp fastsatta trissan 25. Pa grand av elasticiteten i remmarna upptrader emellertid en viss efterslapning, sa att lagertappen 15 kommer att drivas med en rotationshastighet, som Sr nagot lagre an trissans 23 rotationshastighet. Hastighetsforlustens storlek Sr beroende av den osymmetriska tanjningen av remmarna, som i sin tur Sr beroende av det moment, som ettgar for att vrida torkvalsen. Delta moment sammansattes av den friktion, som upptr5.der i torkvalsens lagringar och vid tatningsytorna i packboxen for angtillforseln, och den kraft som valsen utovar pet textilbanan for att draga fram densamma. Forstnamnda friktionsmoment medfor en viss belastning redan i tomgang, dvs. nar textilbanan annu icke Sr dragen Over valsarna, och en viss efterslapning upptrader salunda standigt oavsett de krafter som harrora fran textilbanan. For en riktig funktion av anordningen Sr det viktigt att detta bromsmoment genom en andamalsenlig utbildning av framfOrallt packboxen Mlles relativt lagt, och man bor ej lata detta bromsmoment uttryckt i kgm overstiga 0,2 ggr cylinderns diameter uttryekt i meter. Remmarna bora geiras sa elastiska, att man for detta bromsmoment erhaller en tojning i desamma, vilken gem en efterslapning av den fasta trissan 25 i forhallande till den fria trissan 23 av storleksordningen %. Om hada: remmarna 33, 35 aro tanjbara, motsvarar detta ungefar 3 % extra forIangning i ena remparten, medan feirlangningen maste vara c:a % om endast den ena remmen Sr tanjbar. Friktionen i de olika valsarnas lagringar och packboxar bor hallas sinsemellan sa lika Stor som mojligt. Med den beskrivna drivanordningen kommer da valsarna i tomgang att drivas med samma periferihastighet. Under drift nar textilbanan Sr dragen fram genom torkanordningen och densamma pa grand av torkningen utsattes for krympning, blir periferi hastigheten av torkvalsarna olika, och det moment, som matar fram banan eller ev. bromsar densamma, kommer att variera alit efter dessa langdandringar. Med de namnda vardena pet remmarnas tojning kommer hastighetsavvikelsen hos valsarna i jamfOrelse med hastigheten i tomgeing att motsvaras av en relativt lag dragkraft i banan, vilket Sr vardefullt da man Onskar att krympkrafterna skola fritt fa utlosa sig. En ytterligare sak att observera Sr att den friktion, som utovas av torkvalsarnas lagringsanordningar och paekboxar, bOr vara mOjligast konstant i alla lagen, sa att den icke varierar periodiskt for varje vary. En viss variation maste tolereras, men det har vi-sat sig att det Sr n8dvandigt for en tillfreds: stallande drift att halla denna variation i momentet lagre an halften av det drivmoment, som agar for att medbringa textilbanan. The straps 33 and 35 or at least one of them are elastically stretchable and consist of e.g. of a coil spring or a rubber band. In operation, therefore, one part of the belt will be stretched more than the other part, which means that the turnover ratio will be somewhat smaller than what corresponds to the diameters of the grooves in the pulleys coupled by the belt. The rotation which the pulley 23 is imparted by means of the drive belt 36 is transmitted by means of the belt 35 to the pulley 31 and from said pulley by means of the belt 33 back to the pulley 25 fixed on the shaft pin of the drying roller. However, due to the elasticity of the belts 15 will be driven at a rotational speed which is slightly lower than the rotational speed of the pulley 23. The magnitude of the speed loss Sr depends on the asymmetrical tensioning of the belts, which in turn Sr depends on the torque which engages to turn the drying roller. Delta moments were composed of the friction which occurs in the bearings of the drying roller and at the sealing surfaces in the stuffing box for the steam supply, and the force which the roller exerts on the textile web to pull it out. The first-mentioned friction torque entails a certain load already at idle, ie. when the textile web is not yet drawn over the rollers, and a certain lag occurs constantly regardless of the forces emanating from the textile web. For a correct function of the device, it is important that this braking torque through a proportional training of the packing box in particular is relatively laid, and one should not let this braking torque expressed in kgm exceed 0.2 times the diameter of the cylinder expressed in meters. The belts should be turned so elastic that for this braking torque a strain is obtained in them, which gives a lag of the fixed pulley 25 in relation to the free pulley 23 of the order of%. If the belts 33, 35 are extensible, this corresponds to approximately 3% extra elongation in one part of the strap, while the misalignment must be about% if only one strap is extensible. The friction in the bearings and stuffing boxes of the different rollers should be kept between them as large as possible. With the described drive device, the rollers will then be driven at idle speed at the same peripheral speed. During operation, when the textile web is advanced through the drying device and the same due to the drying is subjected to shrinkage, the peripheral speed of the drying rollers becomes different, and the moment which feeds the web or possibly. brakes the same, will vary alit after these length changes. With the mentioned values of the belt tension, the speed deviation of the rollers in comparison with the speed in idling will correspond to a relatively low traction force in the web, which is valuable when it is desired that the shrinkage forces should be released freely. A further thing to note is that the friction exerted by the storage devices and packing boxes of the drying rollers should be as constant as possible in all layers, so that it does not vary periodically for each vary. A certain variation must be tolerated, but it has been found that it is necessary for a satisfactory operation to keep this variation in the torque lower than half of the driving torque which agar to carry the textile web.

Om banan istallet for att som ovan mita= gits krympa, skulle forlangas i samband med torkningen, minskas den extra tanjningen av remmarnas drivande part, jamfort med clet varde som gaiter for tomgang, alltmera vid de langre fram i banans lopriktning liggande valsarna. Valsarna komma allts5. att successivt rotera hastigare, varmed foljer, att den banan paverkande kraften successivt avtager. If, instead of shrinking as above, the web were to be required in connection with the drying, the extra tensioning of the driving part of the belts would be reduced, compared with the clet as gaits for idling, more and more at the longer rollers lying in the direction of the web. The rollers come all5. to gradually rotate faster, with which it follows that the force acting on the web gradually decreases.

Kilrepskivan 43 installes sO., att periferihastigheten ay valsen 49 motsvarar eller Sr nagot lagre an den hastighet, som de elastiskt drivna valsarna heigst forma bibringa banan, dvs. sa att den del av banan, som gar mellan valsarna 49 och 11, Mlles strackt med en mycket lag spanning. The wedge pulley 43 is installed so that the peripheral speed of the roller 49 corresponds to or is slightly lower than the speed at which the elastically driven rollers most likely provide the web, i.e. said that the part of the web which runs between the rollers 49 and 11, Mlles stretched with a very low tension.

Det ovan beskrivna utforandet kan givetvis modifieras till sina detaljer. Salunda kan rem-men 35 ersattas av en kedja, som 15per Over ph trissorna 23 fasta kedjehjul. Vidare kan exempelvis trissan 31 ersattas av tva ovrid- hart forenade trissor, som bilda remskivor for var sin rem 33, 35. The embodiment described above can of course be modified to its details. Salunda, the belt 35 can be replaced by a chain, which 15per Over ph pulleys 23 fixed sprockets. Furthermore, for example, the pulley 31 can be replaced by two pivotally joined pulleys, which form pulleys for their respective belts 33, 35.

Claims

Claim: Device for operating a group of zigzagged drying rollers intended for drying a web of textile material, preferably fabric, in which device the shrinkage demand occurring through the drying is compensated by the rollers being driven at different speeds by means of elastically stretchable belts over which the rollers are driven individually, characterized in that each of the rollers (11) on its one bearing pin (15) carried partly a drop of freely mounted pulley (23) and partly a pulley (25) fixedly connected to the bearing pin, that a belt or chain (36) driven by a primary drive shaft (37) tops over the freely stored pulleys (23) placed in a zigzag p5 all the drying rollers, and that the free-mounted pulley (23) is customarily rolled with the phase- —3 take the pulley (25) through two parallel running belts (33, 35), which are wound between each of the latter pulleys () and a freely rotating pulley (31), which is mounted on a parallel parallel to the said pin, on the stand fa axle pin (27), of which belts at least one of which is per se calibrated elastically stretchable, so that the pulley (25) fastened to the roller pin is driven with a lag corresponding to the drive moment of the roller in relation to the on the roller pin freely rotating, primarily driven pulley (23). Request publications: Patent Patent ter Iron Sweden 115 796; France 39,548 additions to 694,614; Great Britain 328 566. Stockholm 1962. Kungl. Boktr. P. A. Norstedt & Sinter. 620089