CN101589195B - A system in a web forming machine for guiding the web in connection with a grooved roll - Google Patents
A system in a web forming machine for guiding the web in connection with a grooved roll Download PDFInfo
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- CN101589195B CN101589195B CN2008800027261A CN200880002726A CN101589195B CN 101589195 B CN101589195 B CN 101589195B CN 2008800027261 A CN2008800027261 A CN 2008800027261A CN 200880002726 A CN200880002726 A CN 200880002726A CN 101589195 B CN101589195 B CN 101589195B
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- grooved roller
- operation parts
- width
- roller
- groove
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- 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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- 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
- D21F5/046—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices using pocket ventilation systems
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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
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- Paper (AREA)
Abstract
The invention relates to a system in a web forming machine for guiding a web (28) in connection with a grooved roll (12). The grooved roll (12) includes a surface structure (16) with grooves (56) saidgrooves (56) being open only to the outer surface of the grooved roll (12). A runnability component (18) is included in connection with the grooved roll (12). In addition, the runnability component ( 18 ) includes at least one passive zone (22) in the cross direction (20) of the web forming machine.
Description
Technical field
The present invention relates to a kind of system that is used for being used for guiding width of cloth material with grooved roller at web forming machine relatedly; Said grooved roller comprises the surface texture with a plurality of grooves; Said groove only opens wide towards the outer surface of this grooved roller, and is provided with operation parts (runnability component) with said grooved roller relatedly.
Background technology
In the prior art; Web forming machine, just the multiple different drying section of fiber web forming machine is known, and the some of them drying section uses two-layer fabric running gear (double-fabric run arrangement) and/or some drying sections to use the woven running gear.The unlimited tractive unit of two-layer fabric running gear (open draw) is very responsive to chatter, and this especially can cause operation problem when paper is still moist relatively and therefore intensity is more weak.In recent years, the use of woven running gear is had the trend of increase, wherein width of cloth material is supported by dry fabric (dryer fabric) in the scope of dryer group.Fabric presses width of cloth material makes it be close to the area of heating surface of drying drum.Fabric is on bending roller (turning cylinder) locate the to recline surface of bending roller, and width of cloth material is positioned on the opposite side of fabric.
In the known in the prior art woven running gear, fabric and width of cloth material arrive bending roller with the mode of continuous linear running from drying drum, and between drying drum and bending roller, form closed gap.Width of cloth material that moves towards this gap and cylinder surface are by in this gap, being produced overvoltage by the boundary layer airflow of said width of cloth material and cylinder surface transmission.This overvoltage in the gap causes that this causes producing operation problem by the pressure differential of the width of cloth material top of fabric-supported.The increase of width of cloth material speed makes that the overpressure problems of closing gap is more serious even.Width of cloth material is sent to drying drum from bending roller, therefore forms open gap.Produce the pouched condition with single tissue layer running gear, this is meant in parallel drying drum, the bending roller between drying drum, and dry fabric limited bag shape space relatedly.
In the prior art, people once attempted to use suction roll, various vacuum tank, and roller eliminate the problem relevant with the combination of suction box with closing gap.Be lower than in the old-fashioned slow machines of 800m/min in speed, when being replaced with the woven running gear, make operation problem reduce first through bottom cylinder surface being offered about 5mm dark groove of wide, about 4mm.When speed increases near 1000m/min, the operation parts are added to bottom cylinder or corresponding traditional grooved roller, attempting that its swabbing action is expanded to these grooves, and make swabbing action expand to the fabric wrapping zone on the side face of roller through these grooves.At this prior art of patent gazette WO 8202938 as the trough of belt bottom cylinder of this operation parts that have a decompression proposed.At the bottom cylinder shown in the accompanying drawing of this patent gazette and the operation parts that can reduce pressure.In the 16th page, having described when in region of no pressure 31 and 33, occurring than rough vacuum, is that region of no pressure 32,34 produces higher vacuum through opening 44 typically.Fig. 4～Fig. 8 illustrates a plurality of embodiment of operation parts.Figure 10 and Figure 11 how to illustrate through along the fiber web forming machine laterally, on the diverse location of bottom cylinder, apply vacuum in various degree, and along the several pressure areas of horizontal generation of bottom cylinder.
The size that bottom cylinder adopted of trough of belt is still adopted by traditional grooved roller and vacuum furnace, and wherein groove is that 5mm is wide dark with 4mm.It is wide that neck between each groove (neck) is about 14mm usually.Utilize vacuum furnace can improve the runnability of fiber web forming machine.Yet difficult is to solve this type problem with energy-conservation mode.In addition, along with the raising of machine speed, be used to make the stable energy of width of cloth material significantly to increase.
In the applicant's patent application FI 20031461, proposed a kind of solution of the above problems, wherein proposed the grooved roller of a kind of paper machine or board machine, this grooved roller comprises center roll neck (center journal) and centers on the groove shape surface texture of this roll neck.Exist between this surface texture and this center roll neck to contact, form the structure of sealing substantially thus.The operation parts can together use with roller; The effect in open gap is enhanced by means of for example drawing the swabbing action on the side here; Perhaps on the other hand, one side in closed gap is impacted and flow effect is enhanced by means of the air-flow that directs into closed gap.
Summary of the invention
The purpose of this invention is to provide a kind of system that in web forming machine, is used for guiding with grooved roller width of cloth material, this system can reduce the used energy of generation vacuum in web forming machine relatedly.This system comprises the operation parts, and this grooved roller comprises: have the surface texture of groove, wherein groove only opens wide towards the outer surface of grooved roller, and grooved roller and operation part relation.Characteristic feature of the present invention is that the operation parts comprise at least one passive area transversely at web forming machine (passive zone).
(tissue machine) is relevant with Paper pulp machine with paper machine, board machine, cotton paper machine for web forming machine described herein (being the fiber web forming machine), is provided with several grooved rollers, and width of cloth material is advanced via these grooved rollers.Width of cloth material can not advanced via said grooved roller by fabric-supported or under by the situation of fabric-supported.The grooved roller that is used to guide width of cloth material has the surface texture of trough of belt.Groove in this surface texture only opens wide towards the outer surface of grooved roller.Known ground, grooved roller can be provided with the roll neck that uses the roll neck pin, center roll neck or fixing roll neck, and the housing of the trough of belt of above-mentioned roll neck is suitable for rotation.Therefore, utilize by the boundary layer airflow of roller and width of cloth material/fabric transmission and produce vacuum, this vacuum makes width of cloth material and this grooved roller adhere to explicitly.Groove shape surface texture is owing to the control radial load produces the vacuum to width of cloth material.Advantageously, the side face (circumference) of said groove adjustment grooved roller, but pitch groove (pitched groove) also can be carried out this adjustment.Pitch groove can be embodied as on the whole dimension of grooved roller extends continuously.On the other hand, even several pitch groove can be arranged; For example extend to the pitch groove at edge from the center of grooved roller.Include the operation parts with grooved roller relatedly.Especially, the operation parts comprise at least one passive area transversely at web forming machine.Passive area is meant not from this zone suction air, or not to this zone blow air.As used herein, air more broadly refers to the gas shape medium that in paper machine, moves, for example contains the air of water (like steam).Passive area makes vacuum strengthen, the surface that promptly also distributes through the formation restriction pressure through air-guiding, and make grooved roller formed pressure differential on width of cloth material strengthen.In other words, passive area can produce vacuum under the situation that need not external suction means or air-blast device.Therefore passive area is passive all the time, and in the case, suction or blow flow can be directed to this passive area at no time.The operation parts that comprise passive area are significant in the effect of the operating aspect of improving grooved roller.When the operation parts are passive type, its manufacturing is seen from economic angle also will be more more favourable than in the past.In addition, the remarkable minimizing of power consumption is main.The operation parts of passive area that comprise according to the present invention also allow grooved roller to be positioned at new position.
In one embodiment, the operation parts are included in several zones in a lateral direction of web forming machine.External vacuum directs into some zones in the above-mentioned zone.In other words, the subregion suction air from these zones forms vacuum.Also can form vacuum to these active regions (active zone) blow air through ejector effect (ejector effect).In this case, external vacuum also is directed to said active region.By contrast, the subregion in the said zone is passive.Utilize depressor area initiatively, make the part of this grooved roller reach higher vacuum.These have more, and the zone of condition of high vacuum degree for example can be used for the auxiliary transmission that leads tailing (threading tail).Owing to lead the tailing can be, thereby this zone can be positioned at any position of grooved roller along the edge that laterally is formed at this machine or the middle part of web forming machine.Advantageously, be positioned at the edge of web forming machine, because these zones also are used to prevent the edge chatter except locating on the edge of to carry out tailing leads in this case by the zone of external pressure effect.
In another embodiment, grooved roller is a bending roller.When grooved roller is bending roller, can the operation parts of passive type be placed a bag shape space, in this bag shape space, need to utilize the operation parts to remove a large amount of air, be present in the overvoltage of closed gap one side of bending roller with elimination.
In the 3rd embodiment, has closed gap in first side of bending roller (width of cloth material arrives bending roller from said first side).On second side (width of cloth material leaves bending roller in this second side) of bending roller, has open gap.The operation parts are suitable for being designed to, and make the passage that extends to open gap on the gamut tangent with moving parts, open wide substantially towards the direction of leaving bending roller.This design constitutes and is beneficial to fabric and the stable flox condition of width of cloth material that makes in the open gap.
In the 4th embodiment, drying drum is arranged on the both sides that tilt up or down of bending roller, and width of cloth material is suitable for transmitting with the mode that woven moves via drying drum and bending roller.Width of cloth material transmits with short distance and is sent to bending roller from drying drum, and transmission length is 80～600mm, advantageously is 100～350mm.In short distance transmitted, drying drum and bending roller were set to close to each other, and this can make the drying section of web forming machine more compacter than in the past.This short distance transmission needs device for vacuum generation efficiently, and this is because the pressure differential on width of cloth material and the fabric is only just reaching balance in the short distance very much.Transmit relatedly when comprising the operation parts of passive area when using with short distance, transmit related required stress level with short distance and promptly can realize by less energy, and so and see comparatively economy from cost.
In the 5th embodiment, the angle of width of cloth material contact grooved roller advantageously is less than 30 ° less than 120 °.When using grooved roller, this angle can change in different grooved rollers, makes the bigger contact angle of uses in the transmission that utilizes less roller, and in the long transmission that utilizes several (more than 3) rollers the less contact angle of use.This contact angle for example is used for impact portion, and the angle of osculation of continuous grooved roller can relative to each other change significantly.
In the 6th embodiment, the passive area of the operation parts in the bag shape space of woven operation has the vacuum of 500Pa at least, advantageously is the vacuum of 800Pa.The last dry group of drying section is suitable for lower vacuum.In other words, the section start at drying section needs higher bag shape vacuum of space than the place, end at drying section.As produce this vacuum by aspirator, then need carry out great amount of investment to aspirator.In addition, aspirator need consume lot of energy.In according to prior art system, bag shape space has the vacuum of 100～300Pa.In addition, in the prior art, can from bag shape space, mark off and have the more isolated area of condition of high vacuum degree, swabbing action directly acts on several centimetres wide gap only to improve the vacuum in this gap area in this zone.Thereby; Compare with the operation parts that directly condition of high vacuum degree are directed to the open gap of cylinder of prior art; Can when saving energy, in the bag shape space of the woven running gear that is provided with the operation parts, provide according to system of the present invention than higher in the past vacuum.Vacuum all is higher than in the past in whole bag shape area of space, because such vacuum reaches the control to width of cloth material characteristic (such as shrinkage) so can realize better operation.
Description of drawings
Hereinafter is described the present invention in detail with reference to the accompanying drawing that shows some embodiments of the present invention, wherein:
Fig. 1 illustrates the system that in web forming machine, is used for guiding with grooved roller width of cloth material according to of the present invention relatedly;
Fig. 2 a is illustrated in the sealing device that uses according in the system of the present invention, sees from the place ahead of grooved roller, and the sealing device is pectination part (comb);
Fig. 2 b is illustrated in the sealing device that uses according in the system of the present invention, sees from grooved roller the place ahead, and the sealing device is double pectination part;
Fig. 3 illustrates the system that is used for the woven running gear according to of the present invention;
Fig. 4 a illustrates the system that is provided with the operation parts according to of the present invention;
Fig. 4 b illustrates the system that is provided with the operation parts according to of the present invention;
Fig. 4 c illustrates the system that is provided with the operation parts according to of the present invention;
Fig. 5 illustrates according to the system in vertical impact of the present invention unit (vertical impingement unit);
Fig. 6 illustrates the grooved roller that comprises several groove districts; And
Fig. 7 illustrates and has the system that comprises the operation parts that discharge vacuum.
The specific embodiment
Fig. 1 illustrates the system 10 that in web forming machine, is used for guiding with grooved roller 12 width of cloth material 28 according to of the present invention relatedly.Grooved roller 12 comprises: center roll neck 14; And groove shape surface texture 16, and forming the structure of sealing substantially between the two, wherein said groove only opens wide towards the outside of grooved roller.Operation parts 18 are included in transversely at least one passive area 22 of (promptly on the horizontal direction 20 of web forming machine) relatedly with grooved roller 12.Said passive area does not aspirate or blows operation from the lateral.The swabbing effect of the passive area of operation parts is based on the passive area of operation parts and the compounding practice between the grooved roller.Therefore, passive area is passive all the time, and in the case, suction/blow flow can be introduced this passive area at no time.
Shown in Figure 1 according to system of the present invention in, operation parts 18 are included in several zones 24 in a lateral direction of web forming machine.Vacuum imports the part in said zone from the outside.Active region 26 (promptly importing the zone of the vacuum that is produced by external device (ED)) is positioned at the edge of grooved roller 12, in order to prevent the edge chatter by the width of cloth material 28 of fabrics 29 supports related with grooved roller 12.The width of active region 26 typically is 10～100cm, advantageously is 20～60cm.When web forming machine itself for example is 10m when wide, the outside vacuum that produces only acts on the sub-fraction in the lateral extent of web forming machine.On the width of web forming machine, web forming machine 75～99%, advantageously be 90～98% to cover by passive area.In addition, can operate when machine and during the vacuum that need not in active region, to produce, can stop in active region, to produce vacuum by the external vacuum generation device by the external vacuum generation device.Yet, occurring in width of cloth edges under the situation of chatter, active region can keep operation.In addition, the active region that is arranged in the edge can lead process to be used for transmitting tailing (tail) at afterbody.The zone that is used for transmitting tailing can also be present in the middle part of machine.In fact, passive area also can be made up of a more than part.Several zones can be in the utilization along each position optimization vacuum transversely of web forming machine.
Shown in Figure 1 according to system of the present invention in, comprise the potted component 32 between operation parts 18 and grooved roller 12.Operation parts 18 are towards grooved roller 12 and drying drum 36 openings.Grooved roller 12 intersects at dotted line 21 places with fabric 29.Under the situation of the grooved roller that has pitch groove, potted component can for example be mechanical type reverse pilot (counter thread) or sealant flow (sealing shower).Sealant flow can also be arranged at the passive part of operation parts.Sealant flow can not produce pressure differential between operation parts and outside thereof, be sealed to grooved roller but sealing stream will move parts.Gas flow rate from the sealing device is 5～100m
3/ h/m advantageously is 10～50m
3/ h/m.On the other hand, for generation has the vacuum effectiveness of ejector effect, this flow velocity should be in 500～2000m
3The rank of/h/m.Therefore, used flow velocity significantly produces the required flow velocity of vacuum less than passing through injection equipment in the sealing device.Advantageously, above-mentioned sealing device is mechanical, need not to operate air-flow in this case, has so just simplified the making of sealing device.In addition, use the sealing device need not to operate air-flow more economical.
Fig. 2 a illustrates potted component used in the system related with grooved roller according to the present invention 32, and sealing element 32 is pectination part 50 (seeing from the front portion of grooved roller).Grooved roller 12 does not illustrate with potted component 32 fully, but a part wherein only is shown.Between the bottom 58 of the groove 56 of the end 54 of the tooth portion 52 of pectination part 50 and grooved roller 12, has bottom slot 60.The height c of bottom slot 60 is 0.5～2.5mm, advantageously is 0.8～1.5mm.Between the wall 62 of the groove 56 of the tooth portion 52 of pectination part 50 and grooved roller 12, have wall portion slit 60 '.Wall portion slit 60 ' width d be 0.5～2.5mm, advantageously be 0.8～1.5mm.Between the neck 66 of the frame section 64 of pectination part 50 and grooved roller 12, has frame slot 60 ".Frame slot 60 " height e be 1.0～3.0mm, advantageously be 1.3～2.0mm.
Fig. 2 b illustrates the potted component of seeing from the end of grooved roller 12, system according to the present invention, use with grooved roller 32 relatedly.Potted component is a pectination part 50, and wherein tooth portion 52 is arranged to more than row 68, and advantageously, the tooth portion 52 of pectination part 50 is two row 68.For instance, this labyrinth sealing of continuous pectination part has limited the air-flow that flows to the operation parts in the very high speed of service effectively.
Fig. 3 shows according to system 10 of the present invention, and wherein grooved roller 12 is slewing rollers 34.With bending roller 34 related ground, be huge with the energy-saving effect that the operation parts 18 that comprise passive area provide by grooved roller 12.This is because according to prior art, in order to produce vacuum in the operation parts in surpassing the wide new-type paper machine of 10m, in the drying section related with grooved roller, use the power of about 1～2MW.
Shown in Figure 3 according to system of the present invention in, operation parts 18 are positioned at the bag shape space 37 of woven running gear.Vacuum in the passive area of operation parts 18 is at least 500Pa, advantageously is at least 800Pa.Thereby, can in energy-conservation, in the bag shape space of the woven running gear that is provided with the operation parts, provide than higher in the past vacuum according to system of the present invention.Therefore, improved runnability and to the control of width of cloth material characteristic.
Shown in Figure 3 according to system 10 of the present invention in, first side 38 of bending roller 34 (width of cloth material 28 arrives bending rollers 34 with fabric 29 from said first side 38) has closed gap 40.Second side 42 (width of cloth material 28 leaves bending roller 34 with fabric 29 from this second side 42) at this bending roller has open gap 44.In addition, operation parts 18 are suitable for being designed to, make the passage 46 extend to open gap with the tangent gamut of operation parts 18 on open wide towards the direction of leaving bending roller 34.
Shown in Figure 3 according to system 10 of the present invention in, drying drum 36 is arranged on the acclivitous both sides of bending roller 34.The fabric 29 of width of cloth material 28 and backweb 28 is fit to transmit with the mode of woven operation with bending roller 34 via drying drum 36.In addition, width of cloth material transmits with short distance and is sent to bending roller 34 from drying drum 36, and transmitting length b is 80～600mm, advantageously is 100～350mm.Width of cloth material is being transmitted when drying drum is sent to bending roller with short distance, and drying section can be made more compactlyer than in the past.
Fig. 4 a～Fig. 4 c and Fig. 5 illustrate according to system 10 of the present invention, and wherein, the angle of width of cloth material 28 contact grooved rollers 12 is 1～120 °, advantageously is 4～30 °, is 5～9 ° highly beneficially.Grooved roller is positioned at impact portion, and this impact portion has a cover, and Fig. 4 a illustrates the cross section at the edge 41 of this cover.In Fig. 4 a, two rollers only are set, but the edge of said cover can also be significantly further away from each other between the edge of said cover.System 10 comprises the operation parts 18 between two grooved rollers 12, and these operation parts and fabric 29 are positioned at the same side.The width of cloth material that produces towards operation parts 18 owing to the operation of two grooved rollers 12 and supports fabrics 29 flows.In addition, operation parts 18 are included at least one passive area transversely of web forming machine.
Fig. 4 a～Fig. 4 c and shown in Figure 5 according to system 10 of the present invention in, operation parts 18 are positioned at the bag shape space 47 of impact portion.Vacuum in the passive area of operation parts 18 is 50～500Pa, advantageously is 100～300Pa.Under this vacuum levels, the width of cloth material control in impact portion is acting.And, utilize the operation parts of passive type can realize this stress level well.
In Fig. 4 a～Fig. 4 c, operation parts 18 related with grooved roller 12 are passive type advantageously.Sheet labyrinth sealing (labyrinth seal) for example can or be scraped through smooth wear-resistant edge in the edge of the operation parts of passive type, and mechanically sealing.Sealing can also be accomplished in combination by the way, extends to said gap as much as possible so that scrape the sheet sealing, and is useful on the bigger free degree at other edges of sealing.At the operation parts is under the situation of passive type, and the volume (being casing) in the space that is limited operation parts and fabric advantageously is less.Shown in Fig. 4 a and Fig. 4 c, this design is opened wide towards grooved roller subsequently.When this design is unlimited towards grooved roller subsequently; Promoted the expansion in the swabbing action zone of roller; And above-mentioned fabric of advancing can make the decompression of operation parts, and partly makes the part decompression in the open gap that is formed by operation parts and the side of fabric before the clearance seal of roller.
In Fig. 4 a～Fig. 4 c, the seal on operation parts 18 1 sides of passive type, and the closed gap of subsequently grooved roller 12 also influence the vacuum that results from the operation parts 18.When contact angle does not form closed gap between seal and grooved roller, and even in other cases, when hope reduces the vacuum that is present in the operation parts, the most simply be exactly to make the seal grooved roller that directly reclines.When hope obtains more effective sealing; Perhaps when between operation parts and grooved roller, forming closed gap; Through seal is extended against the direction of rotation of (against) roller; Just can strengthen the vacuum of operation parts and grooved roller, so seal is long more, just restricted more along the air intake of grooved roller.
Shown in Fig. 4 a～Fig. 4 c according to system 10 of the present invention in, the parts 18 that respectively move between each grooved roller 12 are different.When open gap 44 being sealed to operation during parts 18, the most important thing is to prevent that air from flowing out and flow between operation parts and the fabric from grooved roller with fabric.Reason for this reason, for this gap, seal extends deeply as much as possible in open gap.Yet the fact is to make it further leave open gap through hydrodynamic reciprocating sealing spare slightly, can avoid fabric with higher speed and vacuum towards operation parts deflection, thereby also prevented sealing and fabric abrasion.
Shown in Fig. 4 a～Fig. 4 c according to system 10 of the present invention in; Comprise the length of clearance seal spare of surface and the grooved roller 12 of the operation parts 18 that meet passive type with operation parts 18 relevant control parameters, and meet the opening that moves the gap between parts and the relevant grooved roller.The expansion that the lip-deep clearance seal spare of roller the vacuum that is produced along the effect length of the direction of rotation of roller.Affect the generation of vacuum the opening portion in gap.
Shown in Fig. 4 a～Fig. 4 c according to system of the present invention in, at least one grooved roller is non-driving.Because this grooved roller is designed to realize very slight rotation, so this grooved roller can be non-driving.The grooved roller of fine rotation does not need to drive, but receives the required locomotivity of rotation from fabric.Advantageously, all grooved rollers that are arranged in the fabric loop (fabric loop) all are non-drivings.
Shown in Fig. 4 a according to system of the present invention in, the diameter d of grooved roller 12 is less than 1000mm.The diameter of grooved roller depends on the speed of service and the machine-wide of machine equally.The end of grooved roller is provided with bearing.In the prior art, be not to use the grooved roller of this size class, but produce vacuum with vacuum furnace.Provide generation vacuum furnace swabbing action required air-flow via the vacuum furnace bearing, the size of bearing is set according to suction airstream in this case.When the diameter of grooved roller during less than 1000mm, the internal diameter that is arranged on the grooved roller bearing at end advantageously is less than 150mm less than 300mm.Owing to needn't suction airstream be provided via bearing, thereby can set the size of bearing, therefore use grooved roller to replace the vacuum furnace of this size class can save cost significantly according to stress.
Fig. 5 illustrate be provided with vertical impact unit 70 according to system of the present invention.Between grooved roller 12, include operation parts 18, these operation parts comprise at least one passive area.The operation parts that comprise passive area advantageously can be kept the vacuum levels related with a plurality of grooved rollers, and this is very favorable in vertical impact portion.In vertical impact portion, can carry out the drying of width of cloth material very effectively.Vacuum needs, in order that let the overvoltage that otherwise will produce in the closed gap can not make width of cloth material discharge from the support member of fabric.Grooved roller with deep trouth also capable of using, the operation parts by passive type prevent to produce this overvoltage at least in part.Owing to do not have the benefit that grooved roller provided that the benefit that grooved roller provided of the operation parts of part passive type at least is significantly less than the operation parts with passive type, therefore produce the high large-scale aspirator of vacuum levels needs according to prior art.With compared in the past, can in vertical impact portion, use grooved roller effectively according to the operation parts of passive type of the present invention with lower energy consumption.
Machine speed is depended in the design of the bending roller 72 of the vertical impact portion that in system according to the present invention, uses as shown in Figure 5.In machine at a slow speed, can use plain roller (smooth roll), and can grooved roller be used as bending roller in the machine, and use the operation parts or the vacuum furnace of part passive type at least fast.When plain roller was used as bending roller, the operation parts related with this plain roller should be active.
In the used grooved roller 12, the degree of depth f of groove 56 is 10～100mm, advantageously is 20～50mm in the system of Fig. 1～shown in Figure 5.When the groove of grooved roller is so dark,, groove promptly produces vacuum during turning over by that part of grooved roller of width of cloth material covering.The width of groove is 4～10mm, advantageously is 6～7mm.The width of the narrow neck between each groove is 1～8mm, advantageously is 3～6mm.Advantageously, the volume of groove is compared much higher with the grooved roller that traditional and active operation part relation uses with the groove of vacuum furnace (Vac roll).
Fig. 6 is illustrated in according to the grooved roller that uses in the system of the present invention 12, and wherein, adjacent groove 56 is region of no pressure independently.This grooved roller 12 comprises: center roll neck 14 or division center; And groove shape surface texture 16, or steel shell, wherein groove 56 only opens wide towards the outside of grooved roller 12.Surface texture 16 is connected to end ring (end ring) 31.
Fig. 6 illustrates the grooved roller 12 that comprises at least two groove districts 23.Groove 56 in the groove district 23 has same depth, but the groove 56 between the groove district 23 has different groove depths.It is also contemplated that such a case, promptly all grooves all have the different degree of depth.In this case, the quantity in groove district will be identical with the quantity of groove.When grooved roller comprises several groove districts, can reduce the manufacturing cost of grooved roller, improve the pressure distribution of grooved roller simultaneously.By good pressure distribution, the vacuum (promptly acting on the vacuum of fabric from grooved roller) of utilizing the grooved roller related with width of cloth material to produce just can be regulated with the free degree bigger than the past.The pressure that acts on fabric from grooved roller is relevant with the pressure that grooved roller (grooved roller and fabric are related) is produced.In addition, compare with the rigidity of grooved roller can be less for the quality of grooved roller.In other words, under the identical situation of the weight maintenance of grooved roller, the rigidity of grooved roller is increased.
For realizing the operation of fiber web forming machine, in the fiber web forming machine, especially in the zone of width of cloth edges, need vacuum.Vacuum levels can along the fiber web forming machine laterally, lower at the middle part of grooved roller.In the case, at the middle part of grooved roller, groove can be lower.When the required workload of fluting reduced, the manufacturing cost of grooved roller reduced.
Grooved roller 12 shown in Figure 6 comprises three groove districts 23 that are used for half grooved roller.Owing to take all factors into consideration the characteristic and the manufacturing cost of grooved roller, three groove districts in half grooved roller are extremely beneficial embodiment.More generally, the quantity in the groove district 23 in half grooved roller 12 is 2～6, advantageously is 3～4.Corresponding to half grooved roller, two groove districts can form different vacuum with the middle part at the edge of grooved roller.
As shown in Figure 6, the groove 56 in the grooved roller 12 has degree of depth f and width g.In addition, the degree of depth f of groove 24 is greater than its width g, and the generation of this against vacuum degree is very important.Typically, the degree of depth f of groove 56 is 2～15 times of width g of groove 56, advantageously is 3～8 times.When the angle of in application, using grooved roller 12 and width of cloth material contact grooved roller is 1～120 °, the degree of depth f of groove
1Be 30mm, f
2Be 25mm, and f
3Be 20mm.On the other hand, when grooved roller was used as slewing rollers, the degree of depth of groove was typically bigger slightly.
Fig. 4 a～Fig. 4 c and Fig. 5 illustrate system 10, and wherein the angle of width of cloth material 28 contact grooved rollers 12 is 1～120 °.The operation parts 18 of passive type are between grooved roller 12.In this connection, target vacuum degree level typical case advantageously is 100～300Pa.Yet, when machine speed raises, produce the vacuum that significantly raises in the operation parts of passive type.When machine speed was elevated to the level of 1500m/min, vacuum can be elevated to 350Pa or higher.
Fig. 7 illustrates system 10, and wherein the angle of width of cloth material contact grooved roller is less than 30 °.The operation parts 18 of the passive type that has in this system comprise the device 78 in order to partly to discharge vacuum.When vacuum is raised to when too high, said device can make air get into the operation parts of passive type.The device 78 that is used for partly discharging vacuum comprises: the runner 84 in open gap; The runner 82 in closed gap; And the runner 80 of casing.When comprising three runners, just can reduce the pressure of the position reduction operation parts of pressure exactly at needs in order to the device 78 that partly discharges vacuum.In other words, can make the pressure of operation parts effect distribute on demand along machine direction.At the fiber web forming machine transversely, for example can use pipeline, make vacuum distribute on demand with the hole between each runner.When the intensive interval of the Kong Yigeng on the said pipeline is positioned at the middle part of fiber web forming machine, can reduce the pressure that acts in the operation parts at the middle part of web forming machine.The device 78 (being runner) that is used for partly discharging vacuum is passive runner, and these runners do not receive the effect of blowing in this case.In other words, runner is an opening, owing to come across the effect of the vacuum in the operation parts, air can flow to the operation parts through these openings.
The device 78 that is used for partly discharging vacuum shown in Figure 7 comprises control element 88.Control element 88 for example can be to operate very simply to control deflection plate 89.Control element (more specifically being the control deflection plate) utilizes the passive type load device to produce reaction force, and this passive type load device for example can be a spring.When the pressure of operation in the parts drops to when very low, air flow operation parts are promptly opened and made to the control deflection plate.When pressure descends when low, just surmounted the limiting force that need be used to open the control deflection plate.The pressure that the control deflection plate acts in the parts according to operation and opening and closing.May simply be the deflection plate on the inside surface of side wall that is hinged on the operation parts with the control deflection plate 89 that runner 82 and 84 is provided with relatedly.When the operation parts did not have sizable vacuum with respect to external environment, spring was closed runner with the control deflection plate.When vacuum reached capacity the required level of power, air began to flow into the operation parts from runner.
Claims (20)
1. one kind is used for guiding the system of width of cloth material (28) with grooved roller (12) in web forming machine relatedly; Said system comprises operation parts (18); Said grooved roller (12) comprising: have the surface texture (16) of groove (56), wherein said groove (56) only opens wide towards the outer surface of said grooved roller (12), and said grooved roller (12) is related with said operation parts (18); It is characterized in that said operation parts (18) comprise at least one passive area (22) on horizontal (20) of said web forming machine.
2. system according to claim 1 is characterized in that, said operation parts (18) are included in several zones (24) on the horizontal direction (20) of said web forming machine, and the part in said zone is active region (26), and external vacuum directs into said active region.
3. system according to claim 1 and 2 is characterized in that, between said operation parts (18) and said grooved roller (12), includes potted component (32).
4. according to each described system in the claim 3, it is characterized in that said potted component (32) is pectination part (50).
5. according to each described system in claim 1 or 2, it is characterized in that said operation parts (18) are positioned at the bag shape space (37) of woven running gear, and the passive area (22) of said operation parts (18) has the vacuum of 500Pa at least.
6. system according to claim 5 is characterized in that, the passive area (22) of said operation parts (18) has the vacuum of 800Pa.
7. according to each described system in claim 1 or 2, it is characterized in that said grooved roller (12) is bending roller (34).
8. system according to claim 7; Wherein on first side (38) of said bending roller (34), has closed gap (40); Said width of cloth material (28) advances to said bending roller (34) from said first side (38); And on second side (42) of said bending roller (34), have open gap (44), said width of cloth material (28) locates to leave said bending roller (34) in said second side (42), it is characterized in that; Said operation parts (18) are suitable for being designed to, make the passage (46) extend to said open gap (44) with the tangent gamut of said operation parts (18) on open wide substantially along the direction of leaving said bending roller (34).
9. system according to claim 7; Wherein, Drying drum (36) is arranged on being inclined upwardly of said bending roller (34) or downward-sloping both sides, and said width of cloth material (28) is suitable for transmitting with the mode of woven operation via said bending roller (34), it is characterized in that; Said width of cloth material (28) transmits with short distance and is sent to said bending roller (34) from said drying drum (36), and transmitting length (b) is 80～600mm.
10. system according to claim 9, wherein, said transmission length (b) is 100～350mm.
11., it is characterized in that said width of cloth material (28) contacts the angle of said grooved roller (12) less than 120 ° according to each described system in claim 1 or 2.
12. system according to claim 11 is characterized in that, said width of cloth material (28) contacts the angle of said grooved roller (12) less than 30 °
13. system according to claim 11 is characterized in that, said grooved roller (12) is arranged in the impact portion.
14. system according to claim 13 is characterized in that, said operation parts (18) are positioned at the bag shape space (37) of impact portion, and the passive area (22) of said operation parts (18) has the vacuum that is at least 50～500Pa.
15. system according to claim 14 is characterized in that, the passive area (22) of said operation parts (18) has the vacuum of 100～300Pa.
16., it is characterized in that the degree of depth (f) that is present in the said groove (56) in the said grooved roller (12) is 10～100mm according to each described system in claim 1 or 2.
17. system according to claim 16 is characterized in that, the degree of depth (f) that is present in the said groove (56) in the said grooved roller (12) is 20～50mm.
18. according to each described system in claim 1 or 2, the said groove (56) in the said grooved roller (12) has the degree of depth (f) and width (g), it is characterized in that, the said degree of depth (f) of said groove (56) is greater than said width (g).
19. system according to claim 18 is characterized in that, the said degree of depth (f) of said groove (56) is 2～5 times of width (g) of said groove (56).
20. system according to claim 19 is characterized in that, the said degree of depth (f) of said groove (56) is 3～8 times of width (g) of said groove (56).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20075038A FI119560B (en) | 2007-01-22 | 2007-01-22 | A system on a web forming machine for guiding the web in connection with the groove roll |
| FI20075038 | 2007-01-22 | ||
| PCT/FI2008/050021 WO2008090259A1 (en) | 2007-01-22 | 2008-01-21 | A system in a web forming machine for guiding the web in connection with a grooved roll |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101589195A CN101589195A (en) | 2009-11-25 |
| CN101589195B true CN101589195B (en) | 2012-05-02 |
Family
ID=37745730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008800027261A Expired - Fee Related CN101589195B (en) | 2007-01-22 | 2008-01-21 | A system in a web forming machine for guiding the web in connection with a grooved roll |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2126204A1 (en) |
| CN (1) | CN101589195B (en) |
| FI (1) | FI119560B (en) |
| WO (1) | WO2008090259A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1982002938A1 (en) * | 1981-02-17 | 1982-09-02 | Co Weyerhaeuser | A vacuum box for use in high speed papermaking |
| US4807371A (en) * | 1987-02-13 | 1989-02-28 | Beloit Corporation | Apparatus for maintaining the edges of a web in conformity with a dryer felt |
| US6032385A (en) * | 1997-01-31 | 2000-03-07 | Beloit Technologies, Inc. | Method for pocket ventilation and sheet support in a papermaking machine dryer section |
-
2007
- 2007-01-22 FI FI20075038A patent/FI119560B/en not_active IP Right Cessation
-
2008
- 2008-01-21 CN CN2008800027261A patent/CN101589195B/en not_active Expired - Fee Related
- 2008-01-21 EP EP08701721A patent/EP2126204A1/en not_active Withdrawn
- 2008-01-21 WO PCT/FI2008/050021 patent/WO2008090259A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1982002938A1 (en) * | 1981-02-17 | 1982-09-02 | Co Weyerhaeuser | A vacuum box for use in high speed papermaking |
| US4807371A (en) * | 1987-02-13 | 1989-02-28 | Beloit Corporation | Apparatus for maintaining the edges of a web in conformity with a dryer felt |
| US6032385A (en) * | 1997-01-31 | 2000-03-07 | Beloit Technologies, Inc. | Method for pocket ventilation and sheet support in a papermaking machine dryer section |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101589195A (en) | 2009-11-25 |
| FI119560B (en) | 2008-12-31 |
| EP2126204A1 (en) | 2009-12-02 |
| FI20075038A0 (en) | 2007-01-22 |
| WO2008090259A1 (en) | 2008-07-31 |
| FI20075038A (en) | 2008-07-23 |
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