CN101589196B - A system in a dryer section of a web forming machine for guiding a fabric and further the web with guide rolls - Google Patents

A system in a dryer section of a web forming machine for guiding a fabric and further the web with guide rolls Download PDF

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Publication number
CN101589196B
CN101589196B CN2008800028724A CN200880002872A CN101589196B CN 101589196 B CN101589196 B CN 101589196B CN 2008800028724 A CN2008800028724 A CN 2008800028724A CN 200880002872 A CN200880002872 A CN 200880002872A CN 101589196 B CN101589196 B CN 101589196B
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China
Prior art keywords
fluted roller
width
groove
roller
cloth material
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CN2008800028724A
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CN101589196A (en
Inventor
拉米·阿尔托宁
奥利·胡赫塔拉
卡里·尤皮
帕西·凯科
安蒂·科穆莱宁
马蒂·库尔基
马尔库·卢米拉
佩卡·马蒂凯宁
尤卡-佩卡·穆尔塔索
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Valmet Technologies Oy
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Metso Paper Oy
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    • 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
    • D21F5/04—Drying on cylinders on two or more drying cylinders
    • D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices
    • 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
    • D21F5/04—Drying on cylinders on two or more drying cylinders
    • 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
    • D21F3/10—Suction rolls, e.g. couch rolls
    • D21F3/105—Covers thereof

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  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Advancing Webs (AREA)

Abstract

The invention relates to a system in a dryer section of a web forming machine for guiding a fabric (12) and further the web (14) with guide rolls (16). Of the guide rolls (16), at least one is coveredby the web (14) supported by the fabric (12) for less than 90 DEG . In addition, at least one guide roll (16) covered by the web (14) for less than 90 DEG is a grooved roll (22). In the cross direct ion of the web forming machine, the grooved roll (22) has adjacent grooves (24), which grooves (24) are separate vacuum zones over the area covered by the web (14). The grooved roll (22) is adapted assuch to create a vacuum.

Description

Utilize the system of deflector roll guiding fabric and width of cloth material in the drying section of web forming machine
Technical field
The present invention relates to utilize in a kind of drying section of web forming machine deflector roll guiding fabric and and then the system of guiding width of cloth material; In these deflector rolls, coat at least one deflector roll with cornerite less than 90 ° by the width of cloth material of fabric-supported.
Background technology
Known in the prior art have a patent publication us FI 102623.This patent publication us has proposed a kind of utilization and has been included in the system that the impact unit (impingement unit) in the web forming machine becomes dry paper.Impact unit utilizes deflector roll to control fabric and width of cloth material as required.Fabric (also having width of cloth material indirectly) is to be positioned at the deflector roll at this impact unit place less than 30 ° cornerite contact.The deflector roll at end is an adsorption roller in this impact unit, and width of cloth material is sent to drying unit subsequently from this adsorption roller.Fabric (indirectly also have width of cloth material) is with this adsorption roller of the deflector roll at the end that is set to this impact unit less than 90 ° cornerite contact.
Patent publication us FI 20002429 in addition known in the prior art.This patent publication us proposes a kind of vertical impact unit, and in this vertical impact unit, fabric (also having width of cloth material indirectly) is positioned at the deflector roll on this vertical impact unit with the cornerite contact less than 30 °.The drying unit that proposes among patent publication us FI 971714 and the US 4361466 also comprises a plurality of deflector rolls, and width of cloth material contacts said deflector roll with the cornerite less than 30 °.
In known in the prior art these impact unit, fabric and width of cloth material are advanced between drying cylinder with the common orthoscopic method of operation.So, between the deflector roll of fabric and the arrival of this fabric, form closed gap (closing gap).The boundary layer flow that width of cloth material, fabric and the dryer surface that moves towards this gap transmits through them (boundary layer flow) and in this closed gap, produce overvoltage.Overvoltage in the closed gap causes on fabric and width of cloth material, producing pressure differential, has so just produced runnability problems.Improve width of cloth material speed and can make that the overpressure problems in closed gap is even more serious.
For keeping fabric and width of cloth material to be associated with deflector roll, promptly eliminate the overvoltage that in closed gap, produces, adopt adsorption roller as deflector roll.The adsorption roller surface is by perforate or fluting, so that the swabbing action that bring adsorption roller inside (aspiration) is evenly distributed in the surface of suction roll shell.Adsorption roller is generally sectional type adsorption roller (sector suction roll), and swabbing action only is sent to the section of required arrival through adsorption roller in the case.Compare with the adsorption roller that on the whole casing surface, aspirates, the air-flow that uses the sectional type adsorption roller to need is less.Vacuum tank also capable of using (suction box), and, eliminate overpressure peak through vacuum tank is combined with adsorption roller.Yet these devices need the vacuum or the air-flow of enhancing, produce the vacuum and the air-flow that strengthen and need expend sizable energy.The cost that energy caused is considerable.In addition, adsorption roller is prone to stained and be difficult to cleaning.Adsorption roller also comprises the abrasiveness parts, such as seal.
Patent publication us FI 105573 proposes a kind of like this roller, and wherein, open surface structure is connected to roll neck (journal) with the mode of opening wide by support component.In this open source literature, proposition with this roller as with drying section of paper machine in the slewing rollers that are associated of woven running gear, in the case, this roller produces air-flow therebetween.Fabric (also having width of cloth material indirectly) is with about 220 ° usually cornerite contact slewing rollers.More at large, fabric (also having width of cloth material indirectly) is with the cornerite contact slewing rollers greater than 180 °.
Patent publication us FI 20031461 proposes a kind of fluted roller that has deep trouth.The open surface structure of this roller is connected to roll neck with the mode of sealing.In this open source literature, as the slewing rollers that are associated with the woven running gear of drying section of paper machine, in the case, this roller is gone up the generation vacuum in the zone (wrap area) that holds of fabric and width of cloth material with this roller in proposition.Fabric (also having width of cloth material indirectly) is with about 220 ° usually cornerite contact slewing rollers.More at large, fabric (also having width of cloth material indirectly) is with the cornerite contact slewing rollers greater than 180 °.
Summary of the invention
The purpose of this invention is to provide a kind of system that can reduce the web forming machine energy consumption.The present invention is peculiar to be characterized as: at least one is fluted roller by width of cloth material with the deflector roll that coats less than 90 ° cornerite; And said fluted roller is along a plurality of adjacent grooves of laterally having of web forming machine; Said groove is the pressure area that is positioned at the separation on the zone that is coated by said width of cloth material, i.e. region of no pressure.Like this, fluted roller is suitable for producing vacuum.Because fluted roller produces vacuum effectively holding of fabric and width of cloth material on the zone, therefore the pressure area in the said fluted roller is the region of no pressure.
In the drying section of web forming machine (be the fiber web forming machine, comprise the dry application of paper production line), by deflector roll guiding fabric and and then guiding width of cloth material in this this statement.Web forming machine is fiber web forming machine general reference paper machine, board machine, thin-paper machine (tissue machine) and Paper pulp machine.Width of cloth material coats at least one deflector roll in the said deflector roll with the cornerite less than 90 °.In addition, at least one is fluted roller by width of cloth material with the deflector roll that coats less than 90 ° cornerite.Fluted roller is along the adjacent a plurality of grooves of laterally having of web forming machine.This fluted roller is fit to produce vacuum.Along laterally being provided with abreast and not existing under the situation of the wall vertical of web forming machine, produce vacuum at these grooves with rotation direction.These grooves are by the region of no pressure of the separation (independence) on the zone of width of cloth material coating.When groove was the region of no pressure of the separation in the zone that is coated by width of cloth material, these grooves were not connected with each other through the internal structure of fluted roller.When the groove in the fluted roller was not open for the internal structure of this fluted roller, this fluted roller can produce vacuum effectively in holding the zone.That is to say that this fluted roller is fit to produce vacuum like this.Find amazingly, in having the fluted roller of deep trouth, even roller by by the width of cloth material not half of fabric-supported hold and also help holding the region generating vacuum.In open gap (opening gap) and closed gap, all produce vacuum explicitly with fluted roller.In the case, can replace needing to consume significant amount of energy by enough fluted rollers with vacuum vacuum furnace (Vac roll).Except energy consumption, the cleaning of fluted roller is also obviously much easier than vacuum furnace.Fluted roller can also be realized with the design lighter than previous weight.Thus, with fluted roller explicitly, when the fabric of backweb coats fluted roller with the cornerite that surpasses 2 °, can also get rid of fluted roller is driven.In other words, at least one deflector roll (it is a fluted roller) is non-slave mode.The deflector roll of non-slave mode can make deflector roll to realize than previous more simple and reliable mode again.
In the test of fluted roller, the ruuning situation with fluted roller and vacuum furnace compares.Test run shows, although vacuum furnace has vacuum, holds under the degree at the fabric of correspondence; With keep width of cloth material to compare explicitly with vacuum furnace; When using according to fluted roller of the present invention, when keeping width of cloth material explicitly with deflector roll, width of cloth material more closely is attached to fabric face.Measurement to Vacuum connector shows that the vacuum of vacuum furnace is than the big several times of the vacuum that fluted roller produced below fabric.
When these grooves are the pressure areas that separate, during more particularly for the region of no pressure of separating, on the zone that is coated by width of cloth material, said groove is not connected with each other through the internal structure of fluted roller.For example, according to above-mentioned prior art, in the vacuum furnace that in patent publication us FI 971714 and US 4361466, uses, owing to the internal structure of groove through roller is connected with each other, so groove is not to be the region of no pressure of separating.The shell of vacuum furnace comprises that the bottom has the shallow slot in hole, uses so that be present in the interior vacuum action of vacuum furnace in width of cloth material.Yet the groove that comprises in the vacuum furnace does not produce pressure, but pressure acted on the fabric from the inside of roller equably, and then acts on the width of cloth material.In the roller that open source literature FI 105573 is proposed, owing to utilize support component the surface texture of roller to be connected to roll neck with the mode of opening wide, so the pressure area that neither separate of the groove in this roller.Therefore, these grooves are connected with each other through the internal structure of roller, and these grooves belong to same region of no pressure.The vacuum of the groove that open source literature FI 105573 is proposed produces ability and significantly is lower than according to the fluted roller that has deep trouth used in the system of the present invention.
In one embodiment, said system comprises the runnability component between two deflector rolls, and at least one in said two deflector rolls is fluted roller.Said deflector roll is positioned on the same side by the width of cloth material of fabric-supported, and runnability component is included between the deflector roll.This runnability component makes it possible to obtain large-scale vacuum action zone.Preferably, the runnability component that is provided with explicitly with fluted roller is a passive type.By the passive type runnability component, fluted roller can expand between two fluted rollers in the vacuum that produces on the zone that the width of cloth material by fabric-supported holds.
Description of drawings
Hereinafter is through describing the present invention in detail with reference to accompanying drawing, and these accompanying drawings show some embodiments of the present invention, wherein:
Fig. 1 illustrates according to system of the present invention;
Fig. 2 is illustrated in according to the fluted roller that comprises three groove districts that uses in the system of the present invention;
Fig. 3 is illustrated in the fluted roller that uses according in the system of the present invention, and wherein these adjacent grooves are the regions of no pressure of separating;
Fig. 4 illustrates the system that is provided with runnability component according to of the present invention, and this runnability component is between fluted roller and traditional deflector roll;
Fig. 5 a illustrates the system that is provided with runnability component according to of the present invention;
Fig. 5 b illustrates the system that is provided with runnability component according to of the present invention;
Fig. 5 c illustrates the system that is provided with runnability component according to of the present invention;
Fig. 6 be illustrated in the vertical impact unit according to system of the present invention;
Fig. 7 illustrates the system that is provided with active runnability component according to of the present invention;
Fig. 8 illustrates the system that is provided with the semi-passive runnability component according to of the present invention;
Fig. 9 illustrates the system that is provided with the passive type runnability component according to of the present invention;
Figure 10 illustrates an embodiment according to system of the present invention, and it is provided with several fluted rollers and the passive type runnability component between these fluted rollers;
Figure 11 illustrates the system that is provided with the passive type runnability component that comprises flow channel according to of the present invention;
Figure 12 is illustrated in the fluted roller that uses according in the system of the present invention, and this fluted roller is along the section that laterally comprises several separation of web forming machine; And
Figure 13 illustrates according to system of the present invention, uses the fluted roller of the section with several separation in this system.
The specific embodiment
Fig. 1 illustrates according to system 10 of the present invention, and system 10 is used at the drying section of web forming machine guiding fabric 12 and and then the width of cloth material 14 that supported by fabric 12 of guiding.Fabric 12 and width of cloth material 14 are by deflector roll 16 guidings, and at least one deflector roll 16 in the said deflector roll 16 is coated with the cornerite less than 90 ° by width of cloth material 14.In other words, width of cloth material coats at least one deflector roll with 1 °～90 ° cornerite.Deflector roll 16 is for being used to guide the roller of width of cloth material 14.20 of backing rolls are used for supports fabrics 12 to form fabric loop 18.Fabric 12 is between width of cloth material 14 and deflector roll 16.That is to say that width of cloth material 14 does not coat said deflector roll with the mode of direct contact.In addition, at least one is fluted rollers 22 by width of cloth material 14 with the deflector roll 16 that coats less than 90 ° cornerite.This fluted roller is along a plurality of adjacent grooves of laterally having of web forming machine, and the width of these grooves is 10mm at least, be preferably 20mm at least, and above-mentioned fluted roller is fit to produce vacuum.The degree of depth f that is fit to the groove in vacuum this fluted roller can be very dark.But, be generally maximum 100mm, be preferably maximum 50mm according to the degree of depth of the groove in the fluted roller of the present invention.Thereby the degree of depth of groove is 10～100mm, is preferably 20～50mm.Said groove is the region of no pressure that is positioned at the separation on the zone that is coated by said width of cloth material, and thus, fluted roller can be with sizable vacuum action on (direct) width of cloth material.
System 10 shown in Figure 1 for example is applied in the impact unit of web forming machine.Width of cloth material 14 coats top three deflector rolls 16 with fabric 12 with wrap angle sigma, and angle [alpha] is less than 30 °.When deflector roll was fluted roller, the mistake in the closed gap was pressed in width of cloth material/fabric and significantly reduces when coating this fluted roller less than 30 ° cornerite.Preferably, width of cloth material/fabric coats fluted roller with the cornerite more than 4 °, so that vacuum enlarges markedly, and fluted roller obtains the required energy of rotation from fabric movement.Therefore, preferably, width of cloth material/fabric coats fluted roller with 4～30 ° cornerite.Most preferably, width of cloth material/fabric coats fluted roller with 5～9 ° cornerite.When cornerite during greater than 5 °, fluted roller can be reliably obtains from the fabric of backweb and rotates required energy.On the other hand, when cornerite during less than 9 °, that fluted roller can form is long, crooked dry entity (drying entity) gradually.Crooked gradually dry entity makes it possible to obtain sufficiently long impact portion for width of cloth material is dry.Figure 10 illustrates the dry entity that comprises 5 fluted rollers 22.Width of cloth material coats each fluted roller as deflector roll with wrap angle sigma, and angle [alpha] is about 7 °.As stated, very preferably cornerite is between 5～9 °.In the scope of five fluted rollers, β angle that width of cloth material is crooked altogether, this angle is merely about 35 °.
Shown in Figure 1 according to system of the present invention in, two continuous deflector rolls 16 are fluted roller 22.These two continuous deflector rolls 16 (it is a fluted roller 22) also are positioned on the same side of the width of cloth material 14 that is supported by fabric 12.Flow regardless of what fluted roller caused, these two equal independent operatings of continuous fluted roller, and flowing not of causing of these two fluted rollers caused significant interference to each other operation.
Shown in Figure 1 according to system 10 of the present invention in, fluted roller 22 also with subsequently fabric loop 18 ' be provided with explicitly, fabric loop 18 ' the show scope of two rollers in the drawings.This fluted roller produces vacuum, with stable fabric with by the width of cloth material of fabric-supported.Common and this fluted roller is provided with runnability component explicitly, so that vacuum is expanded on the required zone.Preferably, this runnability component is a passive type.
System 10 according to the present invention shown in Figure 1 can be used in the impact unit.Impact unit is covered by cover usually, more specifically serves as reasons to blow cover (blow hood) covering.Only demonstrate among the figure this cover shroud rim 19 than short segments.
Fig. 2 is illustrated in according to the fluted roller that uses in the system of the present invention 22, each wherein adjacent groove 24 region of no pressure for separating.This fluted roller 22 comprises that division center 28 and groove shape surface texture 30 are steel shell, and groove 24 only opens wide to the outside of fluted roller 22 in surface texture 30.Surface texture 30 (being steel shell) is attached to end ring (end ring) 31.
Fig. 2 shows the fluted roller 22 that comprises at least two groove districts 21.Groove 24 in the groove district 21 has the identical degree of depth, but the groove between these groove districts 21 has the different degree of depth.It is also contemplated that such a case: all grooves all have the different degree of depth.In the case, the quantity in groove district will be identical with the quantity of groove.When fluted roller comprises the several trough district, can reduce the manufacturing cost of fluted roller, improve the pressure distribution of fluted roller simultaneously.By good pressure distribution, just can be to regulate the vacuum (promptly acting on the vacuum of fabric) that produces by the fluted roller that is associated with width of cloth material from fluted roller than the previous bigger free degree.The pressure that acts on fabric from fluted roller is meant the pressure that is associated with fabric that fluted roller produces.In addition, can make the quality of fluted roller compare less with its rigidity.In other words, under the situation that the weight of fluted roller remains unchanged, the rigidity of fluted roller increases.
Making wherein, these grooves are the fluted roller challenge as rich as Croesus of the region of no pressure of separation.At present, mainly make fluted roller through machining.In the case, fluted roller is to process through on the thick shell base of fluted roller, covering with lath or groove milling as required.
Fluted roller and the runnability component that is associated with this fluted roller are in the roller region generating vacuum that is coated by fabric.Because the cause of the maneuverability of fiber web forming machine, in the fiber web forming machine, especially on the zone of width of cloth edges, need to form vacuum.In the central part of fluted roller, along the fiber web forming machine laterally, vacuum can be lowered.In the case, being positioned at the groove of the central part of fluted roller can be more shallow.When the required workload of fluting reduced, the manufacturing cost of fluted roller reduced.Because therefore the effect of the reduction bending stiffness that having reduced slots is caused can use fluted roller on than previous wideer machine.
Fluted roller 22 shown in Figure 2 comprises three groove districts 21 on the half grooved roll 22.Three groove districts are set in half grooved roll, owing to taken into account the characteristic and the manufacturing cost of fluted roller, thereby be extremely beneficial embodiment.More generally, in half grooved roll 12, the quantity in groove district 21 is 2～6, is preferably 3～4.Two groove districts make it possible to form different vacuum at the edge of fluted roller with central part.Pressure in this two parts that are distributed in the half roll provides the maximum benefit of being brought by pressure distribution.When the quantity in groove district when two increase to three, manufacturing cost further reduces, and simultaneously, the rigidity of roller is compared increase with its quality.When the quantity in the groove district in the half roll surpassed six, manufacturing cost also began to rise.When the ratio between optimization quality and the rigidity, also can imagine fluted roller with six above groove districts.Yet because the relation of manufacturing cost, this type fluted roller belongs to special case.
Fluted roller 22 shown in Figure 2 comprises five groove districts 21 altogether, and wherein three groove districts 21 are visible in shown half grooved roll 22.These three groove districts 21 are: the first groove district 23, the second groove district 25, and three-flute district 27.The mid point continuity of roller is also crossed in the three-flute district.Property embodiment has as an example provided the mode of grooving of the wide fluted roller of 11000mm.The degree of depth f of the groove 24 in the first groove district 23 23Be 30mm, and the width h in the first groove district 23 is 760mm.The degree of depth f of the groove 24 in the second groove district 25 25Be 25mm, and the width i in the second groove district 25 is 1540mm.The degree of depth f of the groove 24 in the three-flute district 27 27Be 20mm, and the width j in three-flute district 27 is 3050mm.So slot in the wide zone of 10700mm altogether of this fluted roller.The width g of end neck 17 is 150mm.Described fluted roller can use being no more than under the machine speed of about 2100m/min.If it is dark that all grooves all are made into 30mm, then machine speed possibly only reach about 1900m/min.Through using the several trough district, can reduce manufacturing cost and improve machine speed.When the ratio of rigidity of fluted roller was before higher, just can improve machine speed.In the case, the minimum peculiar frequency of fluted roller is also as highest running speed, higher than before.
Lead the width of the tailing (tail) that transmits explicitly to be generally 600mm with afterbody.When the width in the first groove district was 760mm, tailing and this zone (band) matched.It is enough big that the swabbing action of said zone (zone) leads with respect to afterbody.
As shown in Figure 2, the groove 24 in the fluted roller 22 has degree of depth f and width e.In addition, the degree of depth f of groove 24 is greater than its width e, and the generation of this against vacuum is very important.In having the fluted roller of deep trouth,, utilize the width of cloth material of not half to hold also can to hold the region generating vacuum even have the fluted roller of these deep trouths when the degree of depth of groove during greater than its width.
In fluted roller shown in Figure 2 22, the degree of depth f of groove 24 is 2～15 times of width e of groove 24, is preferably 3～8 times of width e of groove 24.The size of groove for example can be: the degree of depth of groove is more than the 10mm, to be preferably more than the 20mm.Yet more preferably, the degree of depth of groove is 30～60mm.So, in the fluted roller degree of depth of groove in the vacuum furnace usually the used degree of depth be that 4mm, width are the groove of 5mm.On the other hand, groove width is 4～10mm, is preferably 6～7mm.The width of neck (neck) is 1～8mm, is preferably 3～6mm.
Fig. 3 illustrates according to the fluted roller in the system of the present invention 22, and this fluted roller is used to guide fabric 12, and and then guiding by the width of cloth material 14 of fabric-supported.This fabric is positioned on the fluted roller 22, and this has width of cloth material 14 above fabric.Fluted roller 22 has a plurality of adjacent grooves 24 along vertically (promptly along web forming machine laterally) of this fluted roller 22.Fluted roller 22 does not have the wall vertical with the rotation direction of this fluted roller.When width of cloth material coated this fluted roller, this fluted roller coated the region generating vacuum of fluted roller at this width of cloth material.
In fluted roller shown in Figure 3 22, the spaced walls (interval) between these grooves 24 is preferably roughly straight and along machine direction.Yet these walls needn't be fully along machine direction, but the groove in the grooved roll surface also can have screw pitch (coil pitch).Groove with pitch can be embodied as on the whole dimension of fluted roller and extend continuously.On the other hand, can be provided with even several have the groove of pitch; For example extend to the groove with pitch at edge from the center of fluted roller.The angle of pitch is preferably less than 5 ° less than 15 °.In the case, rotatablely move because these walls also hinder indistinctively, the vacuum generation ability of fluted roller is in good horizontal.
At the fluted roller 22 according to system of the present invention that is used for shown in Figure 3, adjacent groove 24 is the region of no pressure of the separation on 14 region covered of width of cloth material.This fluted roller 22 comprises division center 28 and groove shape surface texture 30, and contact between the two forms the roughly structure of sealing, and in this structure, these grooves only open wide to the outside of this fluted roller.Under the situation of Fig. 3, this division center comprises center roll neck 29.Known fluted roller can be provided with the roll neck that uses the roll neck pin, center roll neck or fixing roll neck, and the shell of the fluting of this fluted roller is suitable for rotating.Therefore, utilize the boundary layer flow that is transmitted by roller and width of cloth material/fabric, promptly produce vacuum, this vacuum is held in width of cloth material attached on this fluted roller.Groove shape surface texture is owing to the control radial load produces the vacuum that puts on width of cloth material.These grooves 24 are arranged in the surface texture 30 of fluted roller 22.When groove was arranged in the surface texture of fluted roller, groove 24 did not pass surface texture 30.Therefore, these grooves are not through the internal structure of fluted roller be associated with each other (connection).The region of no pressure of these grooves for separating, i.e. pressure unit.When these grooves are the region of no pressure of separating, compare with the fluted roller that utilizes groove all to belong to same region of no pressure, utilize this fluted roller can produce more efficiently vacuum.
In fluted roller shown in Figure 3 22, adjacent groove 24 (independence) structurally separated from one another.Each groove only one encloses around fluted roller.In addition, these grooves are not associated with each other through the internal structure of fluted roller.Thereby each groove is an independent region of no pressure.
However, structurally separate as the adjacent groove of the region of no pressure of separating is also nonessential.Along web forming machine laterally, can structurally belong to for example same bung flange (coil), the groove that promptly has pitch as the adjacent groove of the region of no pressure of separating.Yet width of cloth material because a region of no pressure starts from width of cloth material when coating fluted roller, is ended at when grooved roll surface discharges in their regions of no pressure for separating still in the case.In the case, adjacent groove is the region of no pressure for separating on the zone that is coated by width of cloth material.In same groove, during turning over same circle, do not coat at width of cloth material on the part of groove of fluted roller part and also exist second region of no pressure.Thereby, the duration of the region of no pressure, structurally be independently as the groove of the region of no pressure of separating.
The degree of depth f of the groove 24 in the fluted roller 22 that in system shown in Figure 3, uses is 10～100mm, is preferably 20～50mm.When the groove of fluted roller reaches this degree of depth,, groove produces vacuum in turning over by the process of that part of grooved roller of width of cloth material coating.The width of groove then is 6～10mm.The width of the narrow neck between each groove is 1～8mm.Preferably, the volume of groove is compared much bigger with traditional fluted roller that uses explicitly with active runnability component with vacuum furnace.
Fig. 4 illustrates related with impact unit according to system 10 of the present invention, and this system 10 comprises the runnability component 32 between two deflector rolls 16.Itself does not illustrate impact unit fully.Cover 39 is positioned at the impact unit top, has the edge 19 near width of cloth material 14 surfaces.In continuous deflector roll 16 (runnability component 32 is between continuous deflector roll 16), at least one deflector roll is a fluted roller 22.This runnability component has been improved the ruuning situation of fluted roller.In addition, the continuous deflector roll 16 that is provided with runnability component 32 therebetween is positioned on the same side of width of cloth material 14.When continuous deflector roll 16 was positioned on the same side of width of cloth material 14, this runnability component can produce vacuum between these two deflector rolls.
Shown in Figure 4 according to system of the present invention in, the runnability component 32 related ' be passive type, and " be active with the related runnability component 32 of fluted roller 16 (it is a plain roller) with fluted roller 22.This active runnability component 32 " comprises in order to produce the air-supply passage 40 of swabbing action.According to ejector principle, utilize airflow blow (airflow blow) to produce swabbing action.The passive type runnability component related with fluted roller is owing to need not independent adsorption gas flow, but thereby energy efficient.
Fig. 5 a～Fig. 5 c illustrates the embodiment according to system 10 of the present invention, and this system comprises and is arranged on two as the runnability component 32 between the fluted roller 22 of deflector roll.In addition, the fluted roller 22 that is provided with runnability component 32 therebetween is positioned on the same side of the width of cloth material 14 that is supported by fabric 12.Therefore, follow fluted roller 22 to produce the vacuum that exists explicitly with runnability component 32 in this runnability component back.When two fluted rollers 22 on the same side that is positioned at the width of cloth material 14 that is supported by fabric 12 link to each other with runnability component 32, these fluted rollers and runnability component co-operating.The co-operating of fluted roller 22 and runnability component 32 makes and can produce sizable vacuum in the gamut between the fluted roller 22.
Cover shown in Fig. 5 a more specifically is an air blowing hood 39, covers the impact group that is arranged in drying section, wherein belongs to the fabric 12 of drying section and and then also has width of cloth material 14 to be fit to by fluted roller 22 guidings.In these fluted rollers 22, the width of cloth material 14 that is supported by fabric 12 coats at least one fluted roller 22 with the cornerite less than 90 °.Like this, fluted roller 22 is fit to produce vacuum.In addition, cover comprises the blow zones 92 that is positioned at fluted roller 22 both sides and is positioned at the exhaust zone 94 on the fluted roller.In blow zones, blow dry air towards width of cloth material.And in exhaust zone, then suction air is to remove moisture wherein.Therefore, the thermal shock air from blow zones attaches to width of cloth material on the fabric at the closed gap and the open gap location of fluted roller.So, can in closed nip (gap) and open nip, stop width of cloth material to break away from from the air of blow zones, but the vacuum in these positions can be lower.By contrast, exhaust zone is positioned at the vacuum of fluted roller.Vacuum is the highest at the vacuum place of fluted roller, though therefore in exhaust zone width of cloth material can not break away from from fabric yet.Exhaust outlet and air outlet also are arranged in two scopes between the fluted roller naturally.Air-supply/exhaust zone is present in along machine direction on the gamut of cover, and this makes when ventilation is effective dry just effective.
Exhaust zone is 30～70mm for example along the size of machine direction, is preferably 50mm.Preferably, exhaust zone comprises a big exhaust outlet, and the width of this exhaust outlet equals the width of fiber web forming machine.Utilize catch net to protect this exhaust outlet all sidedly, this net can prevent that for example a scrap of paper is along with the air that aspirates gets into exhaust outlet together.Being arranged on the blow zones that (promptly is positioned at the both sides of fluted roller) in closed gap and the open gap is 150～350mm for example along the size of machine direction, is preferably 250mm.These blow zones comprise air outlet, and these air outlets are hole/opening/slit, and it is of a size of 3～10mm, is preferably 5mm.Exhaust outlet also can comprise the exhaust outlet that several are less.Preferably, these are included in air outlet in the blow zones 92 less than the exhaust outlet that is included in the exhaust zone 94.
Shown in Fig. 5 a, be positioned at blow zones 92 on the both sides of a fluted roller 22 than being positioned at the width of cloth material 14 that exhaust zone 94 on the same fluted roller covers longer scope.Therefore, the blow medium of inflow (it typically is burning gases) is uniform with the pressure that width of cloth material attaches to fabric.
In Fig. 5 a～Fig. 5 c, the runnability component 32 that is associated with fluted roller 22 is preferably passive type.The edge of passive type runnability component can be a mechanical sealing, for example utilizes smooth wear-resistant edge or doctor-like labyrinth.Also can utilize the combination of these modes to realize sealing,, and make the sealing at other edges have the more freedom degree so that the doctor-like seal extends to the gap with best mode.When runnability component was passive type, the volume in the space (that is: case shape space) that is limited runnability component and fabric was preferably less.Shown in Fig. 5 a～Fig. 5 c, this is designed to towards fluted roller subsequently open.When this is designed to when fluted roller subsequently is open; Improved the expanded range in the suction-operated zone of roller; And above-mentioned fabric of advancing can make runnability component decompression, and partly makes open gap on clearance therebetween seal (gap seal) side before that is positioned at roller, that is formed by runnability component and fabric reduce pressure.
In Fig. 5 a～Fig. 5 c, the sealing and the closed gap 36 on the fluted roller subsequently 22 that are arranged on passive type runnability component 32 1 sides also influence in runnability component 32, are the vacuum that produces in the case shape space (casing).The most simply, when contact angle does not form closed gap between seal and fluted roller, and even in other cases, when wanting to reduce in the runnability component existing vacuum, seal is directly clinged on the fluted roller.When the more effective sealing of needs, or when between runnability component and fluted roller, forming closed gap, can extend against the rotation direction of roller, strengthen the vacuum of runnability component and fluted roller through making seal.Therefore, seal is long more, just can limit air get into fluted roller more.
Shown in Fig. 5 a～Fig. 5 c according to system 10 of the present invention in, these runnability component 32 between fluted roller 22 are different.When the open gap 34 of runnability component 32 is led in sealing, the most important thing is to prevent that air from flowing out from fluted roller, and along with fabric flows between fabric and the runnability component.For this reason, seal extends to this gap as far as possible in open gap.In fact, under higher speed and vacuum condition, slightly away from open gap, can avoid width of cloth material, thereby also prevent the wearing and tearing of seal and fabric towards the runnability component deflection through hydrodynamic reciprocating sealing spare.
Shown in Fig. 5 a～Fig. 5 c according to system 10 of the present invention in; Comprise along the length of the clearance seal spare of the surface of passive type runnability component and fluted roller with runnability component 32 relevant control parameters, and the opening in the open gap between subsequently runnability component and relevant fluted roller.The lip-deep clearance seal spare of roller the expanded range of the vacuum that is produced along the effect length of its rotation direction.Clearance opening then affects the generation of vacuum.
Shown in Fig. 5 a～Fig. 5 c according to system 10 of the present invention in, at least one fluted roller 22 is non-slave modes.Have very slight rotation because this fluted roller design can be embodied as, so this fluted roller can be non-slave mode.The fluted roller of fine rotation does not need drive unit, rotates required motoricity but obtained from fabric.Preferably, all fluted rollers that are positioned at fabric loop all are non-slave modes.
Shown in Fig. 5 a according to system 10 of the present invention in, the diameter d of fluted roller 22 is less than 1000mm.Like this, grooved roll diameter depends on the speed of service and the machine-wide of machine.The end of fluted roller is provided with bearing.In the prior art, do not use the fluted roller of this size class, but produce vacuum with adsorption roller.Provide generation adsorption roller swabbing action required air-flow via the adsorption roller bearing, in this case, the size of these bearings is set according to absorption stream (suction flow).When grooved roll diameter during less than 1000mm, the internal diameter of included bearing is preferably less than 150mm less than 300mm in the grooved roll heads.Owing to needn't absorption stream be provided via bearing, thereby can design the size of bearing, therefore use fluted roller to replace the adsorption roller of this size class can save cost significantly according to stress.
Fig. 6 illustrates the system 10 that is provided with vertical impact unit 38 according to of the present invention.Vertically impact unit 38 is provided with cover 39.Vertically using fluted roller 22 to make that vertical impact unit can be to move than previous much higher energy efficiency in the impact unit 38.In addition, owing to need not use the device for vacuum generation of separation to produce vacuum, but produce required vacuum, thereby this impact unit can realize with obvious more simple mode by fluted roller.
Shown in Figure 6 according to system of the present invention in, the width of cloth material 14 that supports by fabric 12 with the cornerite 2 or more, be preferably the cornerite coating fluted roller 22 more than 6 °.Subsequently, fluted roller 22 obtains from fabric 12 and rotates required motoricity, and this makes fluted roller 22 as deflector roll can be embodied as non-slave mode.When the fluted roller that in vertical impact unit, uses was embodied as non-slave mode, it is more simple significantly that this vertical impact unit becomes on the whole.Preferably, the runnability component 32 that is positioned at vertical impact unit is for passive type, and in the case, these runnability component do not need external suction or airflow blow device.
The most important advantage of utilizing fluted roller to obtain is that vertically impact unit can be to realize than previous simpler with compacter mode.Especially, owing to do not use external vacuum and non-slave mode fluted roller, even make this vertical impact unit in limited installing space, also can assemble finely.When vertical impingement unit was more compact, it can be than before more freely being positioned in the drying section.Fluted roller and runnability component even can be positioned between the machine beam, and need not that the system of boring is used for adsorption piece and the hole that drives connector on these machine beams.Therefore, these fluted rollers can be positioned with brand-new mode.
Fig. 7 illustrates according to system 10 of the present invention, and wherein runnability component 32 laterally comprises at least one active region along web forming machine.The width of said active region can be identical with the width of whole web forming machine, perhaps can only cover the horizontal part of web forming machine.This runnability component comprises air-supply passage 40, and airflow blow is directed to (acting on) this runnability component through this air-supply passage, to produce vacuum based on ejector principle.For producing vacuum, also can directly absorption stream be delivered to runnability component.The airflow blow that is directed to runnability component is powerful and produces sizable vacuum, thereby in the case, runnability component is an active runnability component.Preferably, these active regions are positioned at the sidepiece of web forming machine, and available in the case active region comes gas clean-up to prevent wave (flutter).Runnability component can also all be active region in its gamut.
Airflow blow produces vacuum through air-supply passage included in the runnability component as shown in Figure 7 32 40 guiding runnability component 32 to utilize injection stream 41.Especially, injection stream is from the end release of runnability component, and promptly the sidepiece from web forming machine discharges, and in runnability component, produces sizable vacuum.The purpose of injection stream 41 is in runnability component 32, to produce vacuum.
Runnability component also obtains the required airflow blow of blow (blow) 45 through air-supply passage included in the runnability component shown in Figure 7 32 40.Because blow 45 makes boundary layer flow strengthen, so blow 45 is used to produce vacuum.Yet it is active based on the blow that strengthens boundary layer flow runnability component to be become because this airflow blow very a little less than.Mainly strengthen the effect of boundary layer flow with mode air current sealed a little less than utilizing.The airflow blow that is used to strengthen boundary layer flow makes runnability component become semi-passive.
On a side in the closed gap of runnability component 32, runnability component 32 shown in Figure 7 comprises air seal 42.Runnability component 32 also obtains to seal the required airflow blow of blow 46 through air-supply passage 40 included in this runnability component 32.These air seals 42 are used for sealing by sealing blow 46 edge of runnability component 32, in order to avoid harmful air-flow possibly influence the operation of runnability component.Opposite with boundary layer flow, it is active that sealing blow 46 does not make runnability component become.However, runnability component 32 shown in Figure 7 is active, because the vacuum of utilizing injection stream 41 to produce is present in this runnability component 32.
Fig. 8 illustrates according to system 10 of the present invention, and wherein runnability component 32 laterally comprises at least one half passive area along web forming machine.The width of this half passive area can be identical with the width of whole web forming machine, perhaps can only cover the horizontal part of web forming machine.Blow 45 from airflow blow device 43 is parallel to the lip-deep boundary layer flow of roller, but this blow mainly plays sealing function.In addition, the airflow blow of introducing via air-supply passage 40 is used to produce sealant flow 46.On a side in closed gap, be provided with mechanical sealing device 44.Therefore, owing to strengthen the effect of boundary layer flow, runnability component 32 is semi-passives.
Fig. 9 illustrates according to system 10 of the present invention, and wherein runnability component 32 laterally comprises at least one passive area along web forming machine.The width of this passive area can be identical with the width of whole web forming machine, perhaps can only cover the horizontal part of web forming machine.When the width of said active region was the width of whole web forming machine, the airflow blow of supplying with runnability component 32 via air-supply passage 40 was used for producing sealing blow 46 fully.On a side in closed gap, be provided with mechanical sealing device 44.For fluted roller, this passive type runnability component is highly beneficial, can produce ability by the vacuum that fluted roller is realized because this passive type runnability component has been utilized.Thereby the passive area of this runnability component is meant a kind of like this section: vacuum is not to be able to by outer gas stream strengthen in this section, and is based on the co-operating of fluted roller and runnability component.
Except that the sealing air-flow, in runnability component, can use mechanical sealing spare, need not supply with air-flow in the case to runnability component.Therefore, the design of this runnability component can be very simple.This embodiment makes it possible to make economically the passive type runnability component.In addition, the operating cost of these passive type runnability component is cheap.
Figure 10 illustrates the system implementation example that is provided with several fluted rollers 22 according to of the present invention.Passive type runnability component 32 is between these fluted rollers 22.When machine speed raises, produce quite high vacuum at these runnability component places.In this example, the quantity of passive type runnability component 32 is six, that is: first runnability component 71, second runnability component 72, the 3rd runnability component 73, the 4th runnability component 74, the 5th runnability component 75 and the 6th runnability component 76.Explanation as an example, with first runnability component explicitly, when speed is 1045m/min, pressure for-198Pa in other words vacuum be 198Pa; And vacuum is 234Pa when speed is 1504m/min.With second runnability component explicitly, vacuum is 151Pa when speed is 1045m/min; And vacuum is 225Pa when speed is 1504m/min.With the 3rd runnability component explicitly, vacuum is 201Pa when speed is 1045m/min; And vacuum is 296Pa when speed is 1504m/min.With the 4th runnability component explicitly, vacuum is 236Pa when speed is 1045m/min; And vacuum is 366Pa when speed is 1504m/min.With the 5th runnability component explicitly, vacuum is 130Pa when speed is 1045m/min; And vacuum is 204Pa when speed is 1504m/min.With the 6th runnability component explicitly, vacuum is 180Pa when speed is 1045m/min; And vacuum is 214Pa when speed is 1504m/min.The problem that too high vacuum produces is that for example the wearing and tearing of fabric are faster when the friction between fabric and the runnability component becomes big.
Figure 11 illustrates the system 10 that is provided with passive type runnability component 32 according to of the present invention.On the sidepiece in closed gap, be provided with mechanical sealing device 44.Air flow diverter (air deflector) 86 is set on the sidepiece in open gap 86.For the passive type runnability component, do not introduce air to produce sealant flow or vacuum.When the speed of service is elevated to 1300～1700m/min and higher level, just produce unnecessary condition of high vacuum degree explicitly with the passive type runnability component.This runnability component 32 comprises the device 78 that is used for partly discharging vacuum, promptly is used to reduce/regulate the flow channel of vacuum.The device 78 that is used for partly discharging vacuum comprises: the flow channel 80 in the flow channel 82 in the flow channel 84 in open gap, closed gap and case shape space.Air is flow ports (flow opening) through the device that these are used for part release vacuum, and flows into the case shape space of passive type, vacuum is reduced to suitable value.When the device 78 that is used for partly discharging vacuum comprises three flow channels, can, needs reduce the pressure of runnability component when reducing pressure exactly.In other words, acting pressure can be distributed as required in runnability component.For example between flow channel, use the pipe fitting have a plurality of holes, can be as required along the vacuum that laterally distributes of web forming machine.When at the center of fiber web forming machine these holes of pipe fitting being set, can reduce acting pressure in runnability component at the central part of fiber web machine with more intensive interval.The device 78 (being flow channel) that is used to discharge vacuum is preferably the passive type flow channel, this means that air can not be blown to these flow channels or suction air from these flow channels not.In other words, flow channel is such opening: under the effect of the vacuum that in runnability component, exists, air can flow to this runnability component via these openings.
Included passive type runnability component comprises the device 78 that is used to discharge vacuum in the system shown in Figure 11.The device 78 that is used to discharge vacuum can comprise several flow channels, and a passage in these passages is the circulation passage 80 in case shape space.This passage normally is used for discharging maximum one of the included passage of the device 78 of vacuum.Vacuum release 78 (it is preferably the flow channel 80 in case shape space) comprises control element 88.For example, control element 88 can be to operate very simply to control deflection plate (baffle).Generation is used for opposite force (counter force) control element, that more specifically say so and be used to control deflection plate by a passive type bogey, and this passive type bogey for example can be a spring.When the pressure in the runnability component descends when low, runnability component is opened and passed air into to the control deflection plate.When pressure descends when low, open the required limiting force of this control deflection plate and be exceeded.The control deflection plate is opened and is closed according to acting pressure in runnability component.Control deflection plate 89 also is provided with flow channel 82 and 84 explicitly.This control deflection plate may simply be the deflection plate on the inside surface of side wall that is hinged on runnability component.When runnability component did not have sizable vacuum with respect to external environment condition, spring closed flow channel through the control deflection plate.When vacuum reached capacity the required level of power, air began to flow to runnability component from flow channel.
Figure 12 is illustrated in according to the fluted roller that uses in the system of the present invention 22.This fluted roller 22 laterally comprises several sections (zone) 50 along web forming machine.Along web forming machine laterally, the central part of these sections 50 supports on the frame structure 51 through bearing 52.Bearing assembly preferably is embodied as air bearing assembly or magnetic bearing assembly, and this type of bearing assembly can be avoided being stained.The also available traditional lubricating bearings with appropriate seal of bearing assembly is realized.The fluted roller of the groove of this section that comprises a plurality of separation can be made with simple mode, and wherein the section of fluted roller is non-slave mode.When the fabric of backweb coated fluted roller with the cornerite more than 2 °, fluted roller obtained from fabric and rotates required energy.The fluted roller that comprises the horizontal several segments (being segmentation) along web forming machine makes it possible to be assembled into fluted roller by short parts, so just can make fluted roller more simply than prior art.When fluted roller comprised a plurality of short sections (being the part roller), the each several part roller need support the previous littler quality of ratio of itself.The part roller self support that quality is less to make as far as itself, can design gentlyer than before.Simultaneously, complete fluted roller also can be to make than previous lighter design.
In one embodiment, comprise in the same position of fluted roller of several segments, need utilize fluted roller to import the energy that is used for fabric in use.In the case, those sections of the edge of fluted roller can be driven.
Figure 13 illustrates the vertical view according to system of the present invention.Can see that width of cloth material 14 is positioned at the top, fabric 12 is positioned at width of cloth material 14 belows.Fabric 12 is shown as at fluted roller 22 places with width of cloth material 14 and is cut open, so that fluted roller 22 is visible.Along web forming machine laterally, fluted roller 22 comprises the section 50 of several separation.Each section 50 is directly not located adjacent one another; That is to say, can have significant gap or interval between each section.
Shown in Figure 13 according to system of the present invention in, between these sections 50 that form fluted roller 22, choked flow part 56 can be set.Thus, can form continuous runnability component, can approach corresponding mode, expand vacuum with this runnability component through the runnability component of using explicitly with the full duration fluted roller.This choked flow part for example can be the mechanical sealing element that prevents that air from flowing along with fabric.In addition, though also not shown among the figure, runnability component normally is provided with fluted roller explicitly.
System according to the present invention shown in Figure 13 has two grooved zone roll 60,62 that realize by different way.In grooved zone roll 60, section 50 is installed on the roll neck 58 through bearing.On the contrary, in grooved zone roll 62, these sections are installed to frame structure 51 (Figure 12) through bearing.

Claims (22)

  1. One kind in the drying section of web forming machine, utilize continuous deflector roll (16) guiding fabric (12) and and then the system of guiding width of cloth material (14); Said deflector roll (16) is positioned at the same side of the width of cloth material (14) that is supported by said fabric (12); And at least one deflector roll in the said deflector roll (16) is by the fluted roller (22) of said width of cloth material (14) to coat less than 90 ° cornerite; And said fluted roller (22) laterally has an adjacent groove (24) along said web forming machine; Said groove (24) is the region of no pressure of the separation on the zone that is coated by width of cloth material (14), it is characterized in that said system (10) comprises the runnability component (32) that is positioned at two separation between the continuous said deflector roll (16); Said runnability component (32) has open gap (34); Be provided with seal in this open gap (34), the sealing part extends against the rotation direction of said deflector roll, and wherein said fluted roller (22) is the open and suitable thus vacuum that produces of part.
  2. 2. system according to claim 1 is characterized in that, the said groove (24) in the said fluted roller (22) has the degree of depth (f) and width (e), and the degree of depth (f) of said groove (24) is greater than width (e).
  3. 3. system according to claim 2 is characterized in that, the degree of depth (f) of said groove (24) is 2～15 times of width (e) of said groove (24).
  4. 4. system according to claim 2 is characterized in that, the degree of depth (f) of said groove (24) is 3～8 times of width (e) of said groove (24).
  5. 5. according to each described system in the claim 1～4, it is characterized in that the width (e) of the said groove (24) in the said fluted roller (22) is 10mm at least.
  6. 6. according to each described system in the claim 1～4, it is characterized in that the width (e) of the said groove (24) in the said fluted roller (22) is 20mm at least.
  7. 7. according to each described system in the claim 1～4, it is characterized in that said fluted roller (22) comprises two groove districts (21).
  8. 8. system according to claim 7 is characterized in that, in half said roller, the quantity of groove district (21) is 2～6.
  9. 9. system according to claim 7 is characterized in that, in half said roller, the quantity of groove district (21) is 3～4.
  10. 10. according to each described system in the claim 1～4, it is characterized in that two adjacent deflector rolls (16) are fluted roller (22).
  11. 11., it is characterized in that the said runnability component (32) related with said fluted roller (22) is passive type according to each described system in the claim 1～4.
  12. 12., it is characterized in that said runnability component (32) comprises the device (78) that is used for partly discharging vacuum according to each described system in the claim 1～4.
  13. 13. system according to claim 12 is characterized in that, the said device (78) that is used for partly discharging vacuum comprises control element (88).
  14. 14., it is characterized in that at least one said fluted roller (22) is non-slave mode according to each described system in the claim 1～4.
  15. 15., it is characterized in that the diameter (d) of said fluted roller (22) is less than 1000mm according to each described system in the claim 1～4.
  16. 16., it is characterized in that according to each described system in the claim 1～4, be provided with bearing (52) at the both ends of said fluted roller (22), the internal diameter of said bearing (52) at both ends that is located at said fluted roller (22) is less than 300mm.
  17. 17., it is characterized in that according to each described system in the claim 1～4, be provided with bearing (52) at the both ends of said fluted roller (22), the internal diameter of said bearing (52) at both ends that is located at said fluted roller (22) is less than 150mm.
  18. 18., it is characterized in that said width of cloth material (14) coats said fluted roller (22) with the cornerite less than 30 ° according to each described system in the claim 1～4.
  19. 19., it is characterized in that said width of cloth material (14) coats said fluted roller (22) with 5 °～9 ° cornerite according to each described system in the claim 1～4.
  20. 20. the vertical impact unit (38) in the drying section of a web forming machine; Have cover (39) and be used to guide fabric (12) and and then the guiding width of cloth material (14) deflector roll (16); And at least one said deflector roll (16) is coated with the cornerite less than 90 ° by the width of cloth material (14) that is supported by said fabric (12); It is characterized in that; At least one is fluted roller (22) by width of cloth material (14) with the said deflector roll (16) that coats less than 90 ° cornerite, and said fluted roller (22) laterally has an adjacent groove (24) along said web forming machine, and said groove (24) be by the region of no pressure of the separation on the zone of width of cloth material (14) coating; Said fluted roller (22) is fit to produce vacuum thus, and said cover comprises: be positioned at a plurality of blow zones (92) on said fluted roller (22) both sides and be positioned at the exhaust zone (94) that said fluted roller (22) is located.
  21. 21. vertical impact unit according to claim 20 (38); It is characterized in that the distance that is positioned at said blow zones (92) the covering width of cloth material (14) on said fluted roller (22) both sides is longer than the distance that the said exhaust zone (94) that is positioned at same fluted roller place covers width of cloth material (14).
  22. 22., it is characterized in that air outlet included in the said blow zones (92) is less than included exhaust outlet in the said exhaust zone (94) according to claim 20 or 21 described vertical impact unit (38).
CN2008800028724A 2007-01-22 2008-01-21 A system in a dryer section of a web forming machine for guiding a fabric and further the web with guide rolls Active CN101589196B (en)

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FI20075037A FI124218B (en) 2007-01-22 2007-01-22 System in a drying section of a web forming machine for controlling the wire and further web by directional rollers
FI20075037 2007-01-22
PCT/FI2008/050020 WO2008090258A1 (en) 2007-01-22 2008-01-21 A system in a dryer section of a web forming machine for guiding a fabric and further the web with guide rolls

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CN101589196B true CN101589196B (en) 2012-04-25

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DE102011084980A1 (en) * 2011-10-21 2013-04-25 Voith Patent Gmbh roller
CN107419584B (en) * 2017-07-20 2023-05-23 华南理工大学 Roller type top net former and dehydration method thereof

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US4481723A (en) * 1980-12-01 1984-11-13 Valmet Oy Paper machine multiple cylinder dryer

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FI102623B1 (en) 1995-10-04 1999-01-15 Valmet Corp Procedure and apparatus in a paper machine
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FI971714A (en) 1997-04-22 1998-10-23 Valmet Corp Procedure for optimizing the paper evaporation drying, driveability and quality, and drying portion applying the procedure in a paper machine
FI118811B (en) 2000-11-06 2008-03-31 Metso Paper Inc Blow drying section and drying group
FI111280B (en) * 2001-11-08 2003-06-30 Metso Paper Inc Blow box to control web flow
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US4361466A (en) * 1977-10-27 1982-11-30 Beloit Corporation Air impingement web drying method and apparatus
US4481723A (en) * 1980-12-01 1984-11-13 Valmet Oy Paper machine multiple cylinder dryer
WO1982002938A1 (en) * 1981-02-17 1982-09-02 Co Weyerhaeuser A vacuum box for use in high speed papermaking

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DE112008000162T5 (en) 2009-12-10
AT506852A2 (en) 2009-12-15
AT506852B1 (en) 2011-12-15
WO2008090258A1 (en) 2008-07-31

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