CN103774483A

CN103774483A - Shoe roll, prolonged nip press, and fiber web machine

Info

Publication number: CN103774483A
Application number: CN201310487617.6A
Authority: CN
Inventors: 约尔马·斯内尔曼
Original assignee: Metso Paper Oy
Current assignee: Valmet Technologies Oy
Priority date: 2012-10-19
Filing date: 2013-10-17
Publication date: 2014-05-07
Anticipated expiration: 2033-10-17
Also published as: CN103774483B; DE102013220932A1; FI126727B; FI20126089A

Abstract

The invention relates to a shoe roll, a prolonged nip press, and a fiber web machine. The roll (11) has a cladding (17) and a shoe (15) arranged inside the cladding (17) and provided with a burden part (16). The shoe (15) is provided with a suspension arrangement (18) which can be located by a medium and thus designed to allow the shoe to jump with respect to the burden part (16). In addition, the invention also relates to the prolonged nip press and the fiber web machine.

Description

Boots roller, long nip press device and fiber web machine

Technical field

Theme of the present invention relates to a kind of boots roller, and it has sheath and be inner and include the press shoe (hereinafter referred to as boots) of load device at this sheath.In addition, the invention still further relates to a kind of long nip press device and a kind of fiber web maker.

Background technology

Now, in the press section of paper machine and board machine, people know a kind of so-called long nip press device (Langnippressen).This long nip press device is made up of so-called boots roller and counter roller, and wherein for example boots roller can abut against counter roller and is loaded, that is pressurized.Wherein, between roller, form a nip of growing along machine direction.The sheath component of boots roller is made up of band (Bandschlaufe), and this band is for example fixed in the end flange of roller, to make boots rotation.The boots that include load device and supporting arrangement that form nip are positioned at the inside of band.

In the time using independent load cylinder body, must make the boots of shoe press there is large bending rigidity along cross-machine direction so that pressure distribution in a lateral direction can be due to discontinuous load acute variation.Higher bending rigidity may cause following defect: the pressure oscillation that for example needs compensation to be determined by the thickness fluctuation of felt or analog.This will cause: in for example paper piece under failure condition runs to nip time, there will be king-sized localised load on long nip press band, this can cause damage to band in some cases.In the time that breaking appears in press fabric, situation can be even worse.

Summary of the invention

The object of the present invention is to provide a kind of boots roller, in this boots roller, can improve the elasticity of boots.The present invention also aims to provide a kind of long nip press device and a kind of fiber web machine, it has the improved ability that overcomes disturbed condition.

For this reason, the invention provides a kind of boots roller, it comprises: sheath; And it is inner and include the boots of load device to be arranged on described sheath, wherein, is provided with elastic device on described boots, described elastic device can be loaded by medium, and designed to be able to thus described boots are bounced with respect to described load device.

The present invention also provides a kind of long nip press device, has at least one boots roller, and wherein said boots roller is corresponding to boots roller as above.

The present invention provides again a kind of fiber web machine, has at least one press section, and described press section has at least one long nip press device, and wherein said long nip press device is corresponding to long nip press device as above.

In boots roller according to the present invention, can improve the elasticity of boots, and can under normal ruuning situation, not cause in a lateral direction inhomogeneous pressure distribution.

According to an embodiment, the elastic device (Federungsmittelanordnung) being arranged on boots roller has the piston structure being bonded on boots.This piston can have the length of whole boots substantially.Utilize this plunger designs, can get rid of the disturbed condition being caused by paper piece at run duration, the varied in thickness of balanced fabric, even can carry out deflection compensation to boots roller.

In addition, well-known, the distribution (distribution) of load cylinder body can have influence on pressure distribution.According to an embodiment of the present invention, have single that is continuous chamber at elastic device, can control by the load cylinder body of lesser amt, and can improve transverse pressure distribution (Querprofil, lateral contour) simultaneously.In this respect, the present invention can reduce the impact that cylinder body divides the distribution of pairing transverse pressure.

The present invention can realize in many different embodiments.Medium for elastic device can or can also be drawn from boots load device from for example boots-bag lubricating arrangement (Schuh-Taschenschmierung).In addition, boots even can not have a bag lubricating arrangement.

This design is very simple and irrelevant with the implementation type of for example load elements.Other advantages of utilizing boots roller according to the present invention to obtain are provided by description and other parts.

Accompanying drawing explanation

With reference to the accompanying drawings boots roller according to the present invention is described in detail, but boots roller according to the present invention is not subject to the restriction of following described embodiment.

Fig. 1 shows the first embodiment of long nip press device with the cross section under normal operation;

Fig. 2 shows the long nip press device shown in Fig. 1 with the cross section under the disturbed condition being caused by paper piece;

Fig. 3 shows the second embodiment of the internal structure of boots roller with the cross section under normal operation;

Fig. 4 shows the scheme at long nip press device place shown in Fig. 3 with the longitudinal section of the boots that under normal operation, the one end at roller is observed;

Fig. 5 shows the scheme at long nip press device place shown in Fig. 3 with the longitudinal section of the boots that under the disturbed condition being caused by paper piece, the one end at roller is observed;

Fig. 6 shows the 3rd embodiment of the internal structure of long nip press device with the cross section under normal operation;

Fig. 7 illustrates the 4th embodiment of the internal structure of boots roller with exploded pictorial.

The specific embodiment

The example of the environment for use of boots roller 11 according to the present invention in paper machine or board machine has been shown with summary schematic diagram in Fig. 1 and Fig. 2.These views show the so-called long nip press device 10 of observing from the side with cross section.

This long nip press device 10 is made up of boots roller extending longitudinally 11 and its counter roller 12.Boots roller 11 can be resisted against in known manner its counter roller 12 arranging and be loaded.At this, between

roller

11,12, form microscler squeezing gap along machine direction, i.e. nip 13, after just this press type is named with this.

The sheath of boots roller 11 can be made up of band 17.This band 17 can utilize its end to be fixed on (not shown) in the circular end flange of roller 11.This flange also can be rotatably set on the jackshaft 36 of for example roller 11.And, it is also known for such belt squeezing part, wherein, around compared with the band of circular-roll 11, its band can be realized larger loop (Schleife) with only.

The band 17(that the press shoe 15 of microscler stretching, extension that forms nip 13 is positioned at roller 11 is commonly referred to sheath 17) inside.Be arranged in addition the load device 16 on the axle 36 of roller 11 in the inside of roller 11, for boots 15 being loaded with respect to counter roller 12.For example, this load device can have one or two hydraulic cylinder with load piston row (Hydraulikzylinderreihen), itself or by pressing plate 22(Fig. 1 and Fig. 2) or directly (Fig. 3 to Fig. 7) act on boots 15.In loading procedure, due to the shape of boots 15, the roller segment of the circumferential of counter roller 12 (zirkulare) " is absorbed in " in boots roller to a certain extent, and forms thus microscler (for example 100-250mm) nip 13 along machine direction.Counter roller 12 also can have the (not shown) that arranges of boots formula.Boots 15 can rest on rear support part 25 at outlet side, and this rear support part absorbs the power along machine direction effect.

In embodiment as depicted in figs. 1 and 2, can also in boots 15, form lane device 14, enter between boots 15 and sheath 17 through boots 15 for boot media.In this case, lane device 14 has the vertical hole and the lateral aperture that are arranged in boots 15.Can form the introduction passage 26 of extending along the longitudinal direction of boots 15 at the entrance side of boots 15, oil can be directed into the bag 28 at boots 15 and between with 17 of boots 15 via hole 14 from this introduction passage.In boots 15, can the hole of drawing from introduction passage 26 be set with the space of for example 100-200mm.

The boots 15 of boots roller 11 have elastic device 18.In the embodiment shown in Fig. 1 to Fig. 3, elastic device 18 is associated with the lane device 14 medium being directed between boots 15 and sheath 17.Elastic device 18 is arranged between load device 16 and boots 15.In this embodiment, elastic device 18 comprises that at least one is arranged on the part of cylinder block 19(elasticity cylinder body of boots 15 sides) and at least one be arranged on the piston element 20(elastic piston matching with part of cylinder block 19 of load device 16 sides).Therefore, elastic device 18 is a kind of actuator by media drive (executing agency) with regard to its operation principle.Being also advantageous in that of this cylinder body-

piston structure

19,20, it can for example realize the replacing of boots 15 very simply.

In this case, the recess being arranged in the pressing plate 22 of boots 15 is used as part of cylinder block 19, and the passage 14 of bag lubricating arrangement is connected in this recess.Therefore in this embodiment, piston element 20, part of cylinder block 19 and boots 15 are all independent parts.Being called as the pressing plate 22 of part of cylinder block 19 of elastic device 18 and bag 28 the parts that form boots 15 is in alignment with each other by eyebolt 38.If piston element 20 is coupled in part of cylinder block 19, in this recess, form chamber 41.Continuous cylinder body chamber 41 and piston can extend in the whole length of boots 15.The pressure-loaded of chamber 41 is realized by the lubricating oil pipe 14 of boots 15.The part of cylinder block 19 on the border of formation chamber 41 and thus boots 15 move with respect to being set to actionless piston element 20 substantially.The seal 31 of cylinder body chamber 41 is arranged on piston element 20 sides.The seal 31 is resisted against on the wall of part of cylinder block 19.Be provided with the backstop tongue piece for piston element 20 at the top edge of part of cylinder block 19.

In hole 14 between the chamber 41 being formed by part of cylinder block 19 and bag 28, choke valve 39 can be set, because can load balancing gate pit 41 from the lubricating oil pipe of boots 15 14.Utilize choke valve 39 can balancedly flow into the oil stream in bag 28.In addition, can also utilize choke valve 39 regulate boots 15 bag 28 and chamber 41 between pressure ratio.In seal 31, stop part 30 and the choke valve 39 auxiliary accompanying drawing in Fig. 1, can be clear that.

In this embodiment, by the pressure medium between boots 15 to be transported to and sheath 17, elastic device 18 is loaded.Thus, elastic device 18 is designed to, and allows boots 15 with respect to load device 16 bounce (resilience).Elastic device 18 can be corresponding with the width in nip region and therefore also corresponding with load device 16 along the width of machine direction.

Fig. 3 shows the second embodiment of the internal structure of the boots roller 11 under normal operation with sectional view.In this embodiment, also realize the pressure-loaded to cylinder body chamber 41 by the lubricating oil pipe 14 of boots 15.In addition, they are different from embodiment as depicted in figs. 1 and 2, and boots 15 form a kind of overall structure that especially there is no pressing plate now.Part of cylinder block 19 is comprised in the body that forms boots 15 now.In addition, here, the seal 31 of cylinder body chamber 41 be arranged on be positioned at piston element 20 sides spring/tongue piece above.In the cylinder body chamber 41 of the load that is stressed, seal 31 abuts on the backstop tongue piece 30 of the upper edge that is arranged at part of cylinder block 19.

Fig. 4 and Fig. 5 show the embodiment shown in Fig. 3 with the longitudinal section of the boots roller observed in one end of roller 11,12.In Fig. 4, long nip press device 10 is under normal operation, in Fig. 5 under the disturbed condition in being caused by paper piece.Know and illustrate as these accompanying drawings, elastic device 18 has microscler piston 33, and it can be made up of the single plate-like body 33 of substantially extending in the whole length of boots 15 along cross-machine direction.In addition, elastic device 18 is also equipped with the cylinder body chamber 41 being configured on boots 15, and the body 33 that forms piston element 20 is installed in this cylinder body chamber.Cylinder body chamber 41 also can extend substantially along cross-machine direction in the whole length of boots 15.At this, boots 15 even can have deflection compensation.The clear span of cylinder body chamber 41, under normal operation, and during by pressure-loaded, is for example 5-10mm by medium at chamber 41.

Fig. 6 shows the sectional view of the 3rd embodiment of the internal structure of the boots roller 11 under normal operation.Here, boots 15 do not have the pressing plate 22 shown in Fig. 1 and Fig. 2.In this embodiment, the fuel feeding in the bag space 28 to boots 15 is realized by bag lubricant passageway 14.But, pressure medium is transported in elastic device 18 and will be completed by hole 35, this hole 35 is passed the flange in the bottom 34 of load device 16 and is utilized fixture 32 to be fixed on the piston 33 of flange 34 elastic device 18 below.Thus, can also be used in the medium of lubricated bag 28 and be supplied to the water conservancy diversion of the medium of elastic device 18 to be separated from each other.In this embodiment, also need in the hole 35 between the balancing gate pit 41 forming at load cylinder body 21 and by part of cylinder block 19, choke valve be set.

Fig. 7 shows according to the 4th embodiment of the present invention with the sectional view of the internal structure of boots roller 15, and this sectional view also illustrates with the form of exploded view.The assembly of elastic device 18 is separated from each other now.Corresponding to this embodiment in the situation that, boots 15 or a kind of not entire body with independent pressing plate.Elastic device 18 remains between boots 15 and load device 16.In addition, in this embodiment, the bag lubricating arrangement of boots 15 and the channel system arranging have been lacked.The medium that elastic device 18 is loaded is also directed through load piston 34 and elastic piston 33 from load device 16 in the situation that there is no choke valve at this.Can also be clear that the side of the seal 31 between piston 33 and cylinder body 19 in piston 33, and the top edge of the stop part 30 of piston 33 in cylinder body 19 at this.Same content can also clearly from the accompanying drawing of Fig. 1 be seen.

Be disposed in the seal extending longitudinally 31 of elastic device 18 and stop part 30 can at least be arranged on top edge and the piston element 20 of part of cylinder block 19 side along the length direction of roller 11.This elastic device can also upwards seal, and at this, piston 20 is become to mazy with the edge configuration of cylinder body 19.Correspondingly, elastic device 18 is also equipped with end face part 29(Fig. 4 and the Fig. 5 on two end faces that are arranged on boots 15).End face part 29 has tongue piece, and the groove that allows its vertical motion is set for this reason on the end face of boots 15, and this groove has suitable sealing device 40.In addition, elastic device 18 can also be equipped with seal 37(Fig. 1, Fig. 2, Fig. 6 and Fig. 7 of being for example associated with hole).

Function of the present invention is described hereinafter with reference to the accompanying drawings.Accompanying drawing under normal running conditions is Fig. 1, Fig. 3, Fig. 4 and Fig. 6.The cylinder body 19 of elastic device 18 or by the lubricating oil pipe 14 of boots 15, or by load device 16 by pressure-loaded.At medium from the lubricating oil pipe 14 of boots 15 is drawn, the size of the part of cylinder block 19 of boots 15 can be designed as, and the lubrication pressure that makes medium and the product of (effect) area that is arranged on the cylinder body 19 in boots 15 are slightly larger than (effect) area of cylinder body 21 of load device 16 and the product of its load pressure.Make thus the power of the cylinder body 19 of boots 15 exceed the power of load cylinder body 16.Thereby the in the situation that of normal operation (Fig. 1, Fig. 3, Fig. 4 and Fig. 6), the piston 20 of boots 15 leans with stop part 30 on its whole width.

The corresponding disturbed condition being caused by paper piece 23 has been shown in Fig. 2 and Fig. 5, and this disturbed condition occurs on the boots 15 that the fiber web W between counter roller 12 and fabric 24 is associated (Fig. 5).Except paper piece, for example appear at 17 or fabric 21 on error can cause too corresponding situation to occur.At this, the piston element 20 of boots 15 remains on its suitable position substantially, but part of cylinder block 19 and boots 15 may local spring equally loadeds.Can reduce thus the risk that suffers damage.The part spring of boots 15 under disturbed condition has been shown in Fig. 2 and Fig. 5.By the present invention, the pressure in nip 13 can sharply not increase as in the boots of prior art, because local spring makes paper piece can pass through nip 13, thereby can not damage and be with 17.In the time that boots 15 move on piston 20, exert pressure to the oil that is arranged in chamber 41 by the oil-in chamber 41 of closing between piston 20 and cylinder body 19.Make thus oil escape in bag 28 by passage 14, and add there strong pressure and lubricated.In addition, in elasticity situation, oil can also be overflowed by seal 31, for example, in the case of the embodiment shown in Fig. 2.In the time utilizing the medium of load device 16 to load elastic device 18, medium can be overflowed along the direction towards load device 16 again, and/or escapes into the inside of roller 11 by seal 31.

Boots 15 are can (for example single file load device 16 in the situation that) made of aluminum by steel or (at two row load devices in the situation that).

Another additional advantage of the present invention is, can expand the spacing between load cylinder body, this means the quantity that can reduce load cylinder body 16.

The load device 16 of boots 15 can be made up of the standard set-up according to prior art.They can be illustrated different from example, and it realizes the restriction that also can not be subject to basic conception of the present invention.

According to the present invention, two kinds of different pistons can also be set in boots roller 11, each is all arranged in its oneself plane.The load piston of load device 16 is positioned at jackshaft 36 sides of boots roller 11, and has at least one elastic piston 33 between the sheath 17 of roller 11 and load device 16.

Except boots roller 11, the invention still further relates to a kind of long nip press device 10, it has the boots roller 11 of at least one the above-mentioned type.Finally, the invention still further relates to a kind of fiber web machine with at least one press section, this press section has at least one and comprises the long nip press device 10 according to boots roller 11 of the present invention.

It is to be noted: the above and corresponding accompanying drawing should be only for the method according to this invention being described and according to device of the present invention.Therefore the present invention is not subject to the restriction of the above or the embodiment that limited in the claims, but as known to those skilled in the art, thering is multiple variation and modification, these variations and modification are all covered by the scope of the inventive concept defined in claims.

Claims

1. a boots roller (11), it comprises:

Sheath (17); And

Be arranged on described sheath (17) inner and include the boots (15) of load device (16),

It is characterized in that, on described boots (15), be provided with elastic device (18), described elastic device can be loaded by medium, and designed to be able to thus described boots (15) are bounced with respect to described load device (16).

2. boots roller as claimed in claim 1, is characterized in that, described elastic device (18) is placed between described load device (16) and described boots (15).

3. boots roller as claimed in claim 1 or 2, is characterized in that, described elastic device (18) is equipped with:

At least one is arranged on the part of cylinder block (19) of described boots (15) side; And

At least one is arranged on the piston element (20) of described load device (16) side, and

Described part of cylinder block (19) can be mobile with respect to described piston element (20).

4. boots roller as claimed any one in claims 1 to 3, it is characterized in that, the pressure of described medium and the product of area that is arranged on the part of cylinder block (19) on described boots (15) are greater than the area of cylinder body (21) of described load device (16) and the product of its load pressure.

5. the boots roller as described in any one in claim 1 to 4, is characterized in that, described elastic device (18) is installed on the pressing plate (22) of described boots (15).

6. the boots roller as described in any one in claim 1 to 5, is characterized in that,

Described elastic device (18) has seal (31) and stop configurations (30), and

Described seal and stop configurations are at least set up along the longitudinal direction of described roller (11).

7. the boots roller as described in any one in claim 1 to 6, is characterized in that,

Described stop configurations (30) is arranged on the top edge of described part of cylinder block (19), and

Described seal (31) is arranged on the side of described piston element (20).

8. the boots roller as described in any one in claim 1 to 7, is characterized in that, described elastic device (18) has on two end faces that are arranged on described boots (15) and with the end face parts (29) of sealing device (40).

9. the boots roller as described in any one in claim 1 to 8, is characterized in that, described elastic device (18) is arranged in nip press region along machine direction.

10. boots roller as claimed in any one of claims 1-9 wherein, is characterized in that,

In described boots (15), be configured with lane device (14), for medium being guided between described boots (15) and described sheath (17); And

Described elastic device (18) is connected to described lane device (14), to utilize the medium that will guide between described boots (15) and described sheath (17) to load described elastic device (18).

11. boots rollers as described in any one in claim 1 to 10, is characterized in that, described elastic device (18) is designed to be loaded by the supporting medium of described load device (16).

12. 1 kinds of long nip press devices, have at least one boots roller (11), it is characterized in that, described boots roller (11) is corresponding to the boots roller described in any one in claim 1 to 11.

13. 1 kinds of fiber web machines, have at least one press section, and described press section has at least one long nip press device (10), it is characterized in that, described long nip press device (10) is corresponding to the long nip press device described in claim 12.