DE19724911A1 - Web press unit - Google Patents

Abstract

The press assembly to process a web (82) of cardboard and/or paper is forms a press gap (S1,S2) between a suction press roller (10) with a perforated mantle (12) and a tissue cylinder with inner grooves or a drying cylinder. The inner surface of the roller or cylinder mantle (12) is supported by at least one rotating body (20) with sliding bearings (20).

Description

The invention relates to a press unit for treating a Material web such as in particular a cardboard and / or paper track in at least one with a respective counter surface formed press nip, consisting of a suction press roll with ge perforated roller jacket, a tissue groove on the inside linder or a drying cylinder. It also concerns one Press device with at least one such press unit.

In the previously known suction press rolls with perforated rolling coat and the previously known internally grooved tissue cylinders is the use of press shoes for force absorption not possible from the inside, since the between the press shoe and the lubricating film required for the roll or cylinder jacket cannot be built. Accordingly, such suction press rolls and tissue cylinders no high-load presses such as shoe presses.

The aim of the invention is to provide a press unit of the entry named type to create, especially for a one suitable in presses subject to higher loads.

The object is achieved according to the invention in that the Roller or cylinder jacket on its inside about little at least one internal rotating body with an associated one Plain bearing is supported.

This training results in a separation of functions between providing the necessary pressing force on the one hand and vacuuming or heating with steam from others on the part of With the relevant suction press roll or with the be Tissue cylinders that hit can therefore also be subjected to higher loads Presses can be realized.

A deflection is already known from EP 0 741 253 A2 adjusting roller known, the jacket of several pneumatic actable roll body is supported on a carrier. However, this is neither a suction press roll with a perforated roller shell still grooved on the inside tissue cylinder.

In a preferred practical embodiment of the inventions press unit according to the invention have the webs between the Lö chern the roll shell or the webs between the grooves of the cylinder jacket is the same height, being one with the Smooth outer surface of the rotating body engaging form.

The grooves of the steam-heated tissue cylinder are functional in some cases by means provided in the webs in between Holes and / or holes connected to each other, the Condensate drain to at least one siphon or the like at least partially via these holes or bores.

At least one cylindrical rotati is advantageous provided on body.

At least one body of rotation is expediently one Slide bearing lubricated with water and / or condensate supports.

In a practice preferred embodiment of the Press unit according to the invention is at least one rotary body via the relevant plain bearing to a fixed one Supported yoke. It can be between at least one Supporting yoke and the plain bearing of at least one rotating body a press shoe supported on the support yoke may be provided.  

In certain applications, it is useful if little least a press shoe on at least one yoke over little at least one cylinder / piston unit is supported.

Optimal lubrication is achieved by expediently ßlicher additionally at least one rotational body at the one run of the assigned plain bearing with water and / or condensates is lubricated sat.

The lubrication is expediently carried out at least one Slide bearing and / or at least one rotary body at least partly due to water running into the inlet gap.

In an expedient practical implementation of the Invention According to the press unit, at least one is lubricated Plain bearing at least partially by one in the press zone injected lubricant such as cold water in particular, Steam, oil, hot condensate and / or the like.

Advantageously, at least one rotating body can be pre-selected be seen who is at least essentially ge entire press nip width extends. In certain cases it is useful if at least one body of rotation is provided is that in the direction of the nip width in several Teilkör per is divided.

In an advantageous practical embodiment, we at least one body of rotation provided by a in Arranged inside the suction press roll or the tissue cylinder te shoe press roll is formed.

The suction press roll advantageously has a diameter water that is larger than about 1 m.  

The steam-heated tissue cylinder advantageously has a diameter that is greater than about 1 m and preferred is about 3 m.

In a preferred practical embodiment, there are several Rota distributed over the circumference of the roller or cylinder tion body provided to form a preferably water-lubricated roller bearing between the roller or Zy lindermantel and assigned to all rotating bodies th common hollow cylindrical press shoe are arranged.

It is expedient to have several bodies of revolution by Zwi chained together and against shifting secured relative to each other.

In an advantageous practical embodiment, the Roll shell made of a perforated sheet, the Press shoe in the area of a respective press nip on one fixed support yoke is supported. The hohlzy lindric press shoe on at least one yoke over little at least one cylinder / piston unit must be supported.

In a preferred embodiment in practice, the rotating suction press roll or the rotating tissue cylinder penetrated by a supporting yoke and sealed at the end.

Preferably, a rotary body in the be with hot steam openable steam room of the tissue cylinder arranged.

A practical embodiment of the invention Press unit is characterized in that the Tissuezylin which preferably distributed several over its inner circumference Includes rotational body that between the cylinder wall and egg ner fixed circular cylindrical tread arranged  are, and that the condensate drain over in the fixed Tread holes and a drainage channel.

At least one together with the press according to the invention unit can form a respective press nip for example by a shoe press unit or a press roller ze be formed for high line forces.

In practice, for example, the rotation or rotations body, the suction press roll or the tissue cylinder, the counter roller and / or, for example, the suction press roller or the Tissue cylinder wrapping felt.

According to a further expedient embodiment, the Cylinder an inside smooth drying cylinder or Tissuezylin be the.

The outside of the rotating body can be smooth or grooved.

The pressing device according to the invention comprises two each an existing press unit according to the invention ten, which together preferably a double felt press nip form.

The invention is described below with reference to exemplary embodiments play explained with reference to the drawing; in this show:

Fig. 1 is a schematic, partially sectioned Dar position of a first embodiment of a pressing unit in the form of a suction press roll, which is disposed centrally between a shoe press roll and egg ner smooth roll,

Fig. 2a shows a schematic, partly sectional fragmentary view of another embodiment of a pressing unit in the form of a suction press roll,

Fig. 2b is a schematic plan view of the Rotationskör by the pressing unit of FIG. 2a,

Fig. 3a shows a schematic cross-sectional view of another embodiment of a pressing unit ei ner in the form of a steam-heated cylinder tissue,

FIG. 3b is a partial schematic representation of the integrated PressIn 3a shown in FIG., In longitudinal section,

Fig. 4 is a schematic, partially sectioned Dar position another embodiment of a pressing unit in the form of a suction press roll with two in each case by a shoe press roll gebil Deten inner rotation bodies,

Fig. 5 is a schematic, partially sectioned Dar position another embodiment of a pressing unit in the form of a suction press roll having a plurality of distributed over the inner periphery rolling bodies of revolution,

FIG. 6a is a schematic side view of a plurality of concatenated with each other rotary body,

Fig. 6b is a schematic plan view of a portion of the rotation body shown in Fig. 6a,

Fig. 6c and 6d different chain compounds of the interim rule pieces,

Fig. 7a is a schematic, partially sectioned front view of another embodiment of a pressing unit in the form of a steam-heated cylinder tissue,

FIG. 7b is a partial schematic representation of the integrated PressIn 7a shown in FIG., In longitudinal section,

Fig. 8 is a schematic, partially sectioned end view of a further embodiment of a press unit in the form of a steam-heated tissue cylinder with a discharge channel for the condensate and

Fig. 9 is a corresponding to that of Fig. 1 Preßvor direction, but in which the smooth roller is replaced by a further suction press roller.

Figs. 1 to 8 show various embodiments of egg ner pressing unit for the treatment of a material web such as in particular sondere cardboard and / or paper web in at least one press nip formed with a respective counter-surface. Here, the press unit 2, 4 and 5, 7 and 8 respectively as tissue cylinder 14 with the inside grooved cylinder jacket 16 made according to the Fig. 1, each as a suction press roll 10 with a perforated roll mantle 12 and the pressing unit in accordance with Fig. 3 is formed.

In addition, in all embodiments of the Walzenman tel 12 or the cylinder jacket 16 is supported on its inside by at least one internal cylindrical rotary body by 18 with an associated slide bearing 20 . The chaining of the rotating body shown in FIG. 6 can be realized, for example, in the embodiments shown in FIGS . 5, 7 and 8.

In the embodiment shown in FIG. 1, the suction press roll 10 is arranged centrally between a shoe press roll 22 and a smooth, for example heated roll 24 , whereby an elongated first press nip S1 and a second press nip S2 are formed in the web running direction L. To form a third press nip S3 extended in the direction of web travel, the smooth roller 24 is associated with a further shoe press roller 26 .

The first press nip S1 is felted twice, while the other press nips S2 and S3 are each only felted. The upper felt 28 , in the loop of which the suction press roll 10 is arranged, is guided through both the first and the second press nip S1 or S2. The shoe press roll 22 is arranged in the loop of the lower felt 30 . The felt 32 passed through the third press nip S3 wraps around the shoe press roll 26 .

As can best be seen from the shoe press roll 22 , such a roll comprises a flexible roll jacket 34 which is supported on at least one press shoe 36 on a support yoke 38 .

In the area of the first press nip S1, the perforated roll shell 12 of the suction press roll 10 provided with a suction zone 40 is supported by three internal cylindrical rotating bodies 18 . The slide bearing 20 of the cylindrical Rotationskör by 18 are seen in the present case on a press shoe 42 , which is supported on at least one cylinder / piston unit 44 on a fixed support yoke 46 .

The sliding bearings 20 can be lubricated at least partially by water running into the inlet gap.

As can best be seen from FIG. 2, the lubrication of the slide bearings 20 can at least partially also take place by means of a lubricant injected in the pressing zone, such as in particular cold water, steam, oil and / or the like. For this purpose, corresponding channels 48 are provided in the press shoe 42 . In the case of a tissue cylinder, lubrication by hot condensate can alternatively or additionally also take place.

In particular, the Fig. 2a can also be seen that additionally to the rotational body at the inlet of the sliding bearing 20 using water and / or, in the case of a tissue cylinder can be lubricated with condensate Kon.

As can be seen from FIG. 2b, in the present exemplary embodiment the two first rotary bodies 18 extend at least essentially over the entire press gap width. In contrast, the third rotary body is divided into three partial bodies in the direction of the nip width.

Fig. 3a shows a schematic cross-sectional view of another embodiment of a pressing unit ei ner in the form of a steam-heated tissue cylinder 14 with three processing in the web running Rich L successive cylindrical Rotationskör pern 18th As can be seen from FIG. 3a, the middle rotating body 18 has a larger diameter than the two outer rotating bodies.

The slide bearings 20 are supported directly on a fixed support yoke 46 in the present case.

In this steam-heated tissue cylinder 14 with internally grooved cylinder jacket 16 , the condensate 52 is removed in the grooves 50 (see also FIG. 3b). These grooves 50 are connected to one another by holes or bores 56 provided in the intermediate webs 54 , so as to enable the condensate drain to at least one siphon 58 .

The cylindrical rotating body 18 are again guided in Gleitla 20 and supported by water or condensate in these bearings 20 . Lubrication can also be done, at least in part, by water running into the inlet gap.

Fig. 4 shows a schematic, partially sectioned Dar position of a further embodiment of a press unit in the form of a suction press roll 10 with a perforated roll shell 12th

In the present case, two Rotationskör by 18 are provided to form two press nips S1 and S2 with an opposing shoe press roll 22 or an opposing smooth roll 24 , each of which is formed by a shoe press roll or profile roll arranged inside the suction press roll 10 . The respective slide bearing 20 comprises the lubricated press shoe of the shoe press roll in question, over which the flexible roll jacket of the shoe press roll 18 in question or the jacket of the profile roll is guided.

As in the embodiment of FIG. 1 is single-felted also in the present case twice, the first press nip and the second press nip S1 S2. A vacuum is generated in the area 60 , so that the felt 28 is sucked in the area in which it wraps around the suction press roll 10 .

When in Fig. Suction press roll shown in Figure 5 with perforated anchoring system roll shell 12 are a plurality distributed over the rolling inner peripheral rotary body 18 are provided 12, the egg nes to form water-lubricated rolling bearing between the roll shell 12 and an all rotating elements 18 associated with the Common hollow cylindrical press shoe 42 are arranged.

The suction press roll 12 are in turn assigned a shoe press roll 22 as well as a smooth roll 24 to form a first press gap S1 or a second press gap S2.

Compared to the first press nip S1, the hollow cylindrical press shoe 42 is supported directly on a fixed support yoke 46 ', while it is supported against the second press nip S2 via at least one piston / cylinder unit 44 on the associated fixed support yoke 46 .

A directly adjoining the first press gap S1 Be rich 62 between the perforated roll shell 12 and the hollow cylindrical press shoe 42 is connected via channels 64 and a line 66 to a vacuum source.

The first press nip S1 is again double and the second Press gap S2 again felted.

Referring to FIG. 6, a plurality rotary body 18 can rule pieces by Zvi 68 chained together and against a displacement ben be secured relative to each other. In this case, 6a, Fig. Is a schematic side view of a plurality of concatenated in the manner described the rotation body 18 while in Fig. 6b this linked rotary body is shown in a schematic plan view of a part 18.

Figs. 6c and 6d show different possible Ket tenverbindungen 84 of the attachments 68.

Fig. 7a shows a schematic, partially sectioned front view of another embodiment of a pressing unit in the form of a steam-heated cylinder 14 Tissue. In Fig. 7b, one end of this tissue cylinder is shown in longitudinal section Darge.

In this embodiment, according to the rotation body arrangement in the suction press shown in FIG. 5, a plurality of rotating bodies 18 distributed over the inner circumference of the tissue cylinder 14 are provided, which are arranged between the cylinder wall and a fixed circular cylindrical running surface 70 . The rolling bearing formed can be lubricated with water or condensate. The tread 70 is supported on a support yoke 46 .

The steam supply takes place via a channel 72 , while the condensate is discharged again via a siphon 58 . The hot steam is fed via the channel 72 to the area 74 located between the fixed surface 70 and the support yoke 46 .

The rotating cylinder jacket 16 is sealed by a steam head 76 against the fixed support yoke 46 .

Fig. 8 shows a comparable with the Fig. 7 Ausfüh approximate shape of a steam-heated tissue cylinder 14 with several ren distributed over the cylinder inner circumference, between the cylinder wall 16 and a fixed tread 70 angeord Neten rotating bodies 18 with associated water or condensate-lubricated plain bearing 20th .

In the present case, the condensate drainage takes place via holes 78 provided in the upper right area of the fixed running surface 70 and an inner drainage channel 80 arranged underneath it, expediently attached to the support yoke 46 . The condensate 52 is thus collected and removed by means of this channel 80 .

Fig. 9 shows one of the Fig. 1 corresponding Pressvorrich device, but in which the smooth roller is replaced by another, suction press roller 10 a. The further suction press roll 10 a is again provided with a perforated roll shell 12 a, which is supported in the manner described above on its inside on at least one inner cylindrical rotary body 18 with an associated slide bearing. In this press device, the two suction press rolls 10 , 10 a form the press nip S2. The two suction press rolls 10 , 10 a can in particular also form a double felt press nip with one another.

The material web 82 to be produced , which may in particular be a cardboard and / or paper web, is for the sake of simplicity only shown in FIGS. 1 and 9, where it follows the third press nip S3 from the smooth roller 24 or the further suction press roll 10 a is taken off.

Reference list

10th

Suction press roll

10th

a Suction press roll

12th

perforated roller jacket

12th

a perforated roller jacket

14

Tissue cylinder

16

grooved cylinder jacket

18th

cylindrical rotating body

20th

bearings

22

Shoe press roll

24th

smooth roller

26

Shoe press roll

28

felt

30th

felt

32

felt

34

flexible roller jacket

36

Press shoe

38

Tragjoch

40

Suction zone

42

Press shoe

44

Cylinder / piston unit

46

Tragjoch

46

'Tragjoch

48

channels

50

Grooves

52

condensate

54

Footbridges

56

Holes

58

siphon

60

Area

62

Area

64

channels

66

management

68

Spacers

70

Tread

72

channel

74

Area

76

Steam head

78

Holes

80

Drainage channel

82

Material web

84

Chain link
L web running direction
S1 first press nip
S2 second press nip
S3 third press nip

Claims (26)

1. Press unit for treating a material web ( 82 ) such as in particular a cardboard and / or paper web in at least a press nip (S1, S2) formed with a respective counter surface, consisting of a suction press roll ( 10 , 10 a) with a perforated roll jacket ( 12 , 12 a), an internally grooved tissue cylinder ( 14 ) or a drying cylinder, characterized in that the roller or cylinder jacket ( 12 , 12 a or 16 ) on its inside via at least one internally lying rotating body ( 18 ) with an associated Slide bearing ( 20 ) is supported. 2. Press unit according to claim 1, characterized in that the webs between the holes of the roll shell ( 12 , 12 a) or the webs ( 54 ) between the grooves ( 50 ) of the cylinder shell ( 16 ) have the same height and one with the Form rotating body ( 18 ) engaging smooth inner surface of the jacket. 3. Press unit according to claim 1 or 2, characterized in that the grooves ( 50 ) of the steam-heated tissue cylinder ( 14 ) through in the intermediate stands ( 54 ) before seen holes and / or bores ( 56 ) are connected to each other and the condensate drain to at least one siphon ( 58 ) or the like takes place at least partially via these holes or bores ( 56 ). 4. Press unit according to one of the preceding claims, characterized in that at least one cylindrical rotating body ( 18 ) is provided. 5. Press unit according to one of the preceding claims, characterized in that at least one rotary body ( 18 ) is supported by a slide bearing ( 20 ) lubricated with water and / or condensate. 6. Press unit according to one of the preceding claims, characterized in that at least one rotary body ( 18 ) is supported on the fixed sliding bearing ( 20 ) on a fixed support yoke ( 46 , 46 '). 7. pressing unit according to claim 6, characterized in that between at least one yoke (46) and the sliding bearing (20) at least one rotary body (18) is seen a pre-on yoke (46) Supported out press shoe (42). 8. Press unit according to claim 7, characterized in that at least one press shoe ( 42 ) is supported on at least one support yoke ( 46 ) via at least one cylinder / piston unit ( 44 ). 9. Press unit according to one of the preceding claims, characterized in that in addition at least one rotary body ( 18 ) at the inlet of the associated slide bearing ( 20 ) is lubricated with water and / or condensate. 10. Press unit according to one of the preceding claims, characterized in that the lubrication of at least one plain bearing ( 20 ) and / or at least one rotary body ( 18 ) at least partially takes place by running water in the inlet gap. 11. Press unit according to one of the preceding claims, characterized in that the lubrication of at least one slide bearing ( 20 ) takes place at least in part by a lubricant injected in the press zone, such as in particular cold water, steam, oil, hot condensate and / or the like. 12. Press unit according to one of the preceding claims, characterized in that at least one rotary body ( 18 ) is provided which extends at least substantially over the entire width of the press nip. 13. Press unit according to one of the preceding claims, characterized in that at least one rotary body ( 18 ) is provided, which is divided into several partial bodies in the direction of the press nip width. 14. Press unit according to one of the preceding claims, characterized in that at least one rotary body ( 18 ) is provided, which is formed by a shoe press roll arranged inside the suction press roll ( 10 , 10 a) or the tissue cylinder ( 14 ). 15. Press unit according to one of the preceding claims, characterized in that the suction press roll ( 10 , 10 a) has a diameter which is greater than about 1 m. 16. Press unit according to one of the preceding claims, characterized in that the steam-heated tissue cylinder ( 14 ) has a diameter which is greater than about 1 m and is preferably about 3 m. 17. Press unit according to one of the preceding claims, characterized in that a plurality of rotating bodies ( 18 ) distributed over the inner circumference of the roller or cylinder are provided which form a preferably water-lubricated roller bearing between the roller or cylinder jacket ( 12 , 12 a or 16 ) and all of the rotating bodies ( 18 ) are assigned common hollow cylindrical press shoe ( 42 ). 18. Press unit according to one of the preceding claims, characterized in that a plurality of rotary bodies ( 18 ) are chained together by intermediate pieces ( 68 ) and are secured relative to one another against displacement. 19. Press unit according to one of the preceding claims, characterized in that the roller shell ( 12 , 12 a) is made of a perforated sheet and that the press shoe ( 42 ) in the area of a respective press nip (S1, S2) on a fixed the yoke ( 46 , 46 ') is supported. 20. Press unit according to claim 19, characterized in that the hollow cylindrical press shoe ( 42 ) is supported on at least one support yoke ( 46 ) via at least one cylinder / piston unit ( 44 ). 21. Press unit according to one of the preceding claims, characterized in that the rotating suction press roll ( 10 , 10 a) or the ro tissue tissue cylinder ( 14 ) is interspersed by a support yoke ( 46 ) and sealed at the end. 22. Press unit according to one of the preceding claims, characterized in that at least one rotary body ( 18 ) is arranged in the steam space of the tissue cylinder ( 14 ) which can be subjected to hot steam. 23. Press unit according to one of the preceding claims, characterized in that the tissue cylinder ( 14 ) preferably comprises a plurality of rotating bodies ( 18 ) distributed over its inner circumference, which are arranged between the cylinder wall ( 16 ) and a fixed circular cylindrical running surface ( 70 ), and that the condensate drain through holes ( 78 ) provided in the fixed stepping tread ( 70 ) and a discharge channel ( 80 ). 24. Press unit according to one of the preceding claims, characterized, that the cylinder is an internally smooth drying cylinder or Tissue cylinder is. 25. Press unit according to one of the preceding claims, characterized, that the rotating body is smooth or grooved on the outside. 26. Press device with two press units each consisting of a suction press roll ( 10 , 10 a) according to one of the preceding claims, in which the two suction press rolls ( 10 , 10 a) preferably together form a double felt press nip (S2).