EP1693511B1 - Machine for producing a material web and damping device - Google Patents

Abstract

Machine for producing or processing a web of material, comprising a treatment section in which the web is treated with a fluid, where the treatment section is connected to a fluid source via pipework, comprises an elastically deformable compensating material that is located in a fluid receptacle of the fluid source or the treatment section or in a damping device attached to or in the pipework and/or delimits such a fluid receptacle and/or (co)defines an effective cross-section in the pipework. An independent claim is also included for a damping device for mounting in or attachment to pipework between a fluid source and a device to be supplied with fluid, comprising an elastically deformable compensating material that is mounted in and/or delimits a fluid receptacle of the damping device.

Description

The present invention relates to a machine for producing / processing a material web, in particular fibrous web, for example made of paper or cardboard, which comprises at least one treatment section in which the material web is acted upon by a treatment fluid, wherein the treatment section connected via at least one line connection with a treatment fluid source or is connectable, as for example, from the document DE 10160725 A is known.

Machines of this type are known, for example, from the papermaking industry. In most cases, such machines comprise a plurality of treatment sections in which a treatment liquid is added to the material web. For example, for wet-profiling a paper web in a dryer section or in front of a calender of a paper machine, nozzle moisteners are used which deliver water intermittently to the paper web. For this purpose, the nozzle moistener are connected via a line connection to a water feed and in the nozzle moisteners pulsating controllable valves are arranged.

Due to the pulsating operation of the valves and the associated intermittent transport of the treatment liquid from the water supply through the line connection to the nozzle humidifier, these components of the treatment section are permanently exposed to rapid pressure fluctuations, which contribute to a heavy load and thus rapid wear of these components.

Pressure fluctuations may also be imparted to the treatment fluid by, for example, a pump connected to the treatment fluid source or by other sources of vibration connected to the conduit system be transmitted.

In general, a vibration damper for pulsating fluids is known which comprises a cavity defined in a housing which is divided by a movable diaphragm into a fluid chamber and a gas chamber. The pressure fluctuations of the pulsating liquid are compensated or damped in that the membrane can yield to a temporary increase in pressure by intensified compression of the gas volume and, with temporary pressure drop, permits a corresponding expansion of the gas volume. However, such vibration dampers have the disadvantage that the edge of the membrane must be liquid-tight and at the same time stably fixed to the housing and the membrane itself is exposed to strong permanent load especially in this edge region. Furthermore, the gas chamber must be sufficiently sealed to the outside and it must be provided means for filling the gas chamber and for adjusting the gas pressure, so that the known vibration damper is constructed overall relatively complicated.

Damping devices for polishing liquids are from the documents DE 3 625 566 A . DE 3 311 822 A and DE 3 134 783 known.

In view of the prior art discussed, it is an object of the present invention to further develop a machine of the type described above such that pressure fluctuations of the treatment fluid, in particular pulsations in the treatment fluid, are damped with preferably low constructional effort.

To achieve this object, it is proposed according to the present invention that in a machine of the type mentioned elastically deformable compensating material is provided, which is arranged in a fluid receiving space of the treatment fluid source or the treatment section or connected to the line connection or arranged therein damping device and / or a limited such fluid receiving space, and / or elastic deformable compensation material is provided which defines or defines an effective line cross section in at least one section of the line connection. The compensating material is formed by an elastically deformable foam.

As a result of the arrangement of the elastically deformable compensation material in the fluid receiving space or the section of the line connection, the treatment fluid exposed to the pressure fluctuations comes into direct contact with the compensating material and can displace it more or less elastically depending on the instantaneous pressure. The pressure fluctuations in the fluid can thus be partially compensated or damped by the elastic deformation of the compensation material. In fact, with a temporary increase in the pressure of the treatment fluid, the compensation material will deform in such a way that the amount of treatment fluid that can be received in the fluid receiving space or the amount of treatment fluid that can be transported in the conduit cross-section per unit time increases and is thus partially yielded to the pressure rise. Conversely, with a temporary reduction in the pressure of the treatment fluid, the balance material will deform such that the amount of treatment fluid that can be received in the fluid receiving space or the amount of treatment fluid that can be transported in the portion of the conduit connection per unit time decreases and thus partially yields to the pressure reduction. This is possible in a structurally simple and thus cost-effective way damping of pressure fluctuations occurring in the treatment fluid.

The balance material may be arranged and configured to be compressed as the pressure of the treatment fluid increases. Compression of the counterbalancing material with increasing pressure can have a positive effect on the durability of many counterbalancing materials because the structural stress and thus the risk of a constant change in the material properties of the counterbalancing material during compression are lower.

Alternatively, however, the compensation material may also be arranged and configured such that it is stretched with increasing pressure of the treatment fluid. Depending on the specific configuration, a structurally particularly simple damping system can then result.

The object of the present invention is also to include compensation material, which is compressed with increasing pressure of the treatment fluid due to its structure and arrangement sections and stretched in sections. Also contemplated is the use of a plurality of balance elements having the balance material, each of which may be arranged and configured such that as the treatment fluid pressure increases, some of the elements are compressed and others of the elements are expanded. In this way, a high degree of flexibility and design freedom is provided to tailor the damping characteristics of the system to specific requirements.

To make a damping system of the machine according to the invention particularly simple and using as few components as possible, it is proposed that the compensation material at least a portion of a boundary wall of the fluid receiving space or the portion of the line connection or at least one arranged in the fluid receiving space or in a line cross section of the line connection Molding forms. Thus, the compensation material can have a double function as a boundary wall on the one hand and as a damping means for damping pressure fluctuations on the other hand. The provision of a molded part also means minimal cost and labor from the point of view of manufacture and maintenance.

In order to realize the present invention in the manner of a damping device, which in a simple way in a machine of the above mentioned type can be arranged or retrofitted, the provision of a housing structure is proposed, in which the compensation material is arranged. Specifically, it is then possible that at least one compensation element having the compensating material is arranged in the housing structure and alone or together with this limits the fluid receiving space or the portion of the line connection, so that thus a fluid receiving space or line connecting portion is formed with at least one elastically deformable wall portion.

Alternatively or additionally, it may be provided that at least one compensating element having the compensating material is arranged in the fluid receiving space formed in a housing structure. In the case of a compensating element arranged in this way, it may even be unnecessary to fasten the compensating element to the housing structure. Furthermore, the arrangement of the compensating element in the housing structure offers the advantage that it can come into contact with the treatment fluid with a particularly large part of its surface, in particular on all sides, and thus be compressible on the housing structure without interactions with larger attachment surfaces.

If the compensating element is arranged in the fluid receiving space, fluid may flow around and / or through it. In this way, there are a variety of design options to set up the damping and flow characteristics of the damping device as desired and adapted to the expected in the machine pressures and pressure fluctuations. For example, substantially all of the fluid receiving space or conduit cross-section may be filled with the compensating material, with at least one channel passing through the compensating material to bring the treating fluid into contact with the compensating material. Alternatively, the compensating material in the form of strips or moldings that are less than the Fill half of the fluid receiving space or the line cross section, be introduced so that it is flowed around by the treatment fluid or the treatment fluid flows past them.

In a further preferred embodiment, it is proposed that at least one compensating material exhibiting, tubular or sleeve-shaped compensating element is provided, which receives treatment fluids or is flowed through by treatment fluid, such that increases with increasing pressure of the treatment fluid, the effective line cross-section of the compensating element. Such a tubular or sleeve-shaped compensating element is easy to produce and acts in such an arrangement at the same time as a boundary wall of the fluid receiving space or the portion of the line connection.

Especially when using a tubular or sleeve-shaped compensating element, but also with other compensating elements, it may be advantageous if the compensating element is designed with a stabilization surrounding the compensating material. In this way, z. B. a defined basic shape of the compensating element, such as the tube or sleeve shape to be maintained even at strongly fluctuating pressures and / or damage to the compensating element at higher pressures, eg. B. bursting of the hose can be prevented.

For a hose or sleeve-shaped compensating element, this stabilization can be achieved in such a way that the compensating element comprises two or more concentrically arranged tube layers, of which at least one inner tube layer is formed from compensating material. In this way, an outer of the tube views prevent excessive expansion of the internal compensation material with increasing pressure. The outer stabilizing hose layer can likewise be formed of elastically deformable material and thus also influence the damping properties of the arrangement.

The balance material used in the present invention is formed from an elastically deformable foam, in particular a silicone foam, EPDM elastomer foam, polyethylene foam or polypropylene foam. Such a foam or foamed material has particularly advantageous elastic properties, wherein the damping characteristic of the material can be adjusted in a simple manner by the choice of the foamed plastic, the density and the thickness of the foam. Thus, a suitable foam can be produced for different pressure ranges or pressure fluctuation ranges.

Preferably, the foam is a closed cell foam or a foam having a treatment layer substantially impermeable outer layer. In this way, it is possible to dispense with the use of a separating wall or separating membrane between the treatment fluid and the foam, since the air inclusions which are significant for the elasticity remain trapped in the foam even when the treatment fluid is in contact with the foam. For a particularly effective damping effect, it is advantageous if the foam has a Shore hardness of about 6 Shore A to about 18 Shore A, preferably from about 10 Shore A to about 18 Shore A.

With regard to the connection of the fluid receiving space to the line connection of the treatment section, it is preferable to use two connection principles. According to a first connection principle, it is proposed that the fluid receiving space is connected via at least one fluid inlet to an upstream section of the line connection and via at least one fluid outlet to a downstream section of the line connection. The fluid receiving space is arranged in this way as a flow-through device in the flow path of the treatment fluid. Such arranged fluid receiving space then acts in the manner of a portion of the line connection, in which the damping of pressure fluctuations is provided.

According to a second connection principle, the fluid receiving space has a fluid passage, which is connected at the line connection branching off from the latter. A damping device connected in this way as a branch substantially does not hinder the flow of the treatment fluid along the line connection, wherein nevertheless the compensation material arranged in the damping device is in contact with the treatment fluid, so that pressure fluctuations in the treatment fluid are effectively balanced or damped.

In a development of the invention, it is proposed that the flow of the treatment fluid can be limited by at least one throttle device associated with the fluid receiving space or the section of the line connection. Such a throttle device may be provided, for example, at a fluid inlet or a fluid outlet or other fluid passage of the housing structure or in the compensation material and offers a further possibility, the To influence the damping characteristics of the system.

The described damping system according to the present invention can be advantageously used in various treatment sections of a machine of the type mentioned, in which pressure fluctuations in a fluid line system to be compensated. With particular advantage, however, the treatment section is arranged in a drying section or in front of a calender of the machine. In this area, moisture from profiled webs is delivered to the paper web for moisture cross-profiling of paper webs, so that the flow rate of water fluctuates periodically through the pipe connections leading to the valves.

In general, the effect of the damping system according to the invention is particularly effective when the treatment fluid is a treatment liquid, for example water, since liquids are hardly compressible and thus themselves are not able to compensate for shocks and pressure fluctuations.

The present invention further relates to a damping device for arrangement in or for connection to a line connection between a fluid source and a device to be supplied with fluid. According to the present invention, in such a damping device elastically deformable compensating material is provided, which is arranged in a fluid receiving space of the damping device / or limits this. The compensation material consists of elastically deformable foam. The damping device according to the invention can advantageously be further developed with the invention features described above in connection with the machine according to the invention for the production / processing of a material web.

Fig. 1 und 2

zeigen jeweils eine Dämpfvorrichtung aus dem Stand der Technik.

Fig. 3

zeigt ein erstes Ausführungsbeispiel einer erfindungsgemäßen Dämpfvorrichtung, welche schlauchförmig ausgebildet ist.

Fig. 4

zeigt eine Schnittansicht entlang einer Linie IV-IV in Fig. 3.

Fig. 5 und 6

zeigen ein zweites bzw. ein drittes Ausführungsbeispiel der Erfindung, welche ebenfalls schlauchförmige Struktur aufweisen.

Fig. 7

zeigt ein alternatives Anschlussprinzip für die Dämpfvorrichtungen der Fig. 3 bis 6.

Fig. 8a und 8b

zeigen Dämpfvorrichtungen eines vierten Ausführungsbeispiels der Erfindung für zwei verschiedene Anschlussmöglichkeiten.

Fig. 9a und 9b

zeigen Dämpfvorrichtungen eines fünften Ausführungsbeispiels der Erfindung für zwei verschiedene Anschlussmöglichkeiten.

Fig. 10a und 10b

zeigen Dämpfvorrichtungen eines sechsten Ausführungsbeispiels der Erfindung für zwei verschiedene Anschlussmöglichkeiten.

Fig. 11 bis 15

zeigen Ausführungsbeispiele 7 bis 11 der Erfindung, in welchen die Dämpfvorrichtungen als Durchstromeinrichtungen angeordnet sind.

Fig. 16

zeigt eine schematische Darstellung eines Ausführungsbeispiels einer erfindungsgemäßen Maschine zur Herstellung/Bearbeitung einer Materialbahn.

The invention will now be described by way of preferred embodiments with reference to the accompanying drawings explained in more detail.

Fig. 1 and 2

each show a damping device of the prior art.

Fig. 3

shows a first embodiment of a damping device according to the invention, which is formed tubular.

Fig. 4

shows a sectional view taken along a line IV-IV in Fig. 3 ,

FIGS. 5 and 6

show a second and a third embodiment of the invention, which also have tubular structure.

Fig. 7

shows an alternative connection principle for the damping devices of Fig. 3 to 6 ,

Fig. 8a and 8b

show damping devices of a fourth embodiment of the invention for two different connection options.

Fig. 9a and 9b

show damping devices of a fifth embodiment of the invention for two different connection options.

10a and 10b

show damping devices of a sixth embodiment of the invention for two different connection options.

Fig. 11 to 15

show embodiments 7 to 11 of the invention, in which the damping devices are arranged as flow devices.

Fig. 16

shows a schematic representation of an embodiment of a machine according to the invention for the production / processing of a material web.

For illustration are in Fig. 1 and 2 two examples of damping devices of the prior art shown schematically. In Fig. 1 The damping device 10 includes a housing structure 12 that encloses a cavity 14. The cavity 14 is divided by an elastic membrane 16 into a liquid chamber 18 and a gas chamber 20. The damping device 10 is connected to a connection line (not shown) via a liquid inlet 22 and a liquid outlet 24, which communicate with the liquid chamber 14.

In operation, the liquid chamber 14 is filled with treatment liquid and pressure fluctuations occurring in the line connection are transferred to the liquid in the liquid chamber 14. In accordance with the pressure fluctuations in the treatment liquid, the membrane 16 delimiting the liquid chamber 14 is deflected and the gas in the gas chamber 20 is compressed or expanded.

Another known from the prior art damping device 26 is in Fig. 2 illustrated. This device 26 is connected via a T-shaped branch 28 to a line connection 30. The T-shaped branch 28 is connected to a liquid chamber 32 of the damping device 26 via a fluid passage 34. A wall of the liquid chamber 32 is formed by a piston 36, which is movably received in the housing structure and biased by a spring 38 in the direction of a reduction of the liquid chamber 32.

In this design variant, special effort is required for the liquid-tight sealing of a region between the piston and the housing wall in order to prevent the leakage of treatment liquid into the space of the spring 38.

Fig. 3 to 15 show various embodiments of inventive damping devices with which the disadvantages of the damping devices of the prior art can be largely avoided and which are provided and designed according to the invention for use in a machine for producing / processing a web.

In 3 and 4 according to a first embodiment, a tubular damping device 40 is illustrated, which can be integrated as a flow device in a connecting line 41, so that treatment liquid can enter through a liquid inlet 44 into the liquid chamber 46 and exit from this through an outlet 46 again.

A wall of a hose 48 forms a compensation element and is made of a foamed material, for. Silicone foam, EPDM elastomer foam (ethylene-propylene-diene rubber elastomeric foam), polyethylene foam or polypropylene foam, which has a closed cell structure to allow the treatment liquid to pass outwardly prevent. Alternatively, a liquid-impermeable layer may be formed or disposed on the inside 50 of the tube.

The diameter of the tube 48 is preferably between about 4 mm and about 15 mm, more preferably between about 6 mm and about 10 mm. The wall thickness of the tube 48 is preferably in the range of about 2 mm to about 10 mm, more preferably in the range of about 2 mm to about 6 mm. Furthermore, it has been found to be particularly advantageous when the density the material of the tube 48 is in the range of about 0.2 to about 0.6 g / cm ³ and the tube material has a Shore hardness according to DIN 53505 in the range of about 6 to about 18 Shore A, particularly preferably in Range of about 10 to about 18 Shore A, has. The length of the tube 48 is preferably in the range of about 50 mm to about 500 mm, more preferably in the range of about 100 mm to about 200 mm.

In the operational state, the liquid chamber 42 of the tube 48 is substantially completely filled with the treatment liquid and the wall of the tube 48 formed from the elastic foam is stretched to a certain extent according to the pressure of the treatment liquid. A pressure fluctuation occurring in the treatment liquid can now be absorbed by a change in the expansion amount of the tubing, so that a damping effect is provided. The structure of this damping device 40 is also extremely simple, since the hose wall 48 in addition to the function as a compensating element and the function of the wall of the liquid chamber 42 belongs.

In a variant of this embodiment, the hose formed from the compensating material is not only provided as a hose section, as in Fig. 3 indicated, but extends over a longer piece of the line connection. In particular, the entire line connection may be formed from a hose having the compensation material.

This in Fig. 5 shown second embodiment of the invention provides a further development of in 3 and 4 In the second embodiment, a sheath 52 is provided which is disposed around the hose 48 and stabilizes it. The sheath 52 may be an elastic outer tube made of silicone or an EPDM elastomer.

An outer tube having a Shore hardness in the range of about 50 to about 80 Shore A, particularly preferably in the range of about 50 to about 70 Shore A and having a thickness in the range between about 0, has proven to be particularly effective , 5 and about 3 mm exposed. Furthermore, it has been found that an inner diameter of about 6 mm to about 25 mm, preferably from about 8 mm to about 18 mm, is advantageous. This diameter should be matched to the length of the hose, which is preferably between about 200 mm and about 1500 mm.

In order to increase or further increase the stability of the tube according to the first embodiment or according to the second embodiment, the tube may additionally be provided with a reinforcement in the form of a tissue surrounding the tube or a shell supporting it. In this way, a deformation of the hose at too low pressures or damage to the tubing at too high pressures reliably avoided.

Fig. 6 shows a third embodiment of the invention, which is different from the damping device 40 of in 3 and 4 shown differs in that the wall of the tube 48a has a substantially rectangular shape in the cross-section extending perpendicular to the tube running direction. Such a cross-sectional shape has an effect on the damping characteristic of the damping device in that at lower pressure fluctuations initially the side walls 54a of the hose 48a bulge inwards or outwards, whereas a change in the expansion will occur even in the corner regions 56a only at higher pressure fluctuations. In general, various cross-sectional shapes for a tubular damping device are conceivable, which have different damping characteristics.

The previously illustrated embodiments 1 to 3 are as Flow devices have been described. However, these damping devices are also according to a T-shaped branch 58 according to Fig. 7 connectable, so that the tubular damping device is then not arranged as a portion of the line connection, but as a branch. Unlike the in Fig. 3 to 6 the embodiments shown, the damping device according to Fig. 7 therefore not separate inlets and outlets, but is connected via only a single fluid passage 60.

With reference to the 8a, 8b, 9a, 9b, 10a and 10b Three further embodiments of the invention will now be described in which molded parts formed from compensating material are arranged in a housing structure.

In an in Fig. 8a shown fourth embodiment of the invention, the damping device 40b has a cuboid housing structure 62b, which is composed of an upper housing part 64b and a lower housing part 66b. The housing portions 64b, 66b are configured and interconnected to define a substantially closed fluid chamber 42b therebetween.

Balance material 48b is attached as a thick layer to the inner walls of the liquid chamber 42b, with the areas of an inlet 44b and an outlet 46b recessed. In this way, since most of the inner wall of the housing structure 62b is covered with the balance material 48b, a particularly large interaction area is provided between the treatment fluid in the liquid chamber 42b and the balance material 48b. The treatment liquid received in the liquid chamber 42b during operation of the damping device 40b can thus effectively transfer its pressure fluctuations to the compensation material 48b, in order to apply it in accordance with the instantaneous pressure against the inner wall of the housing structure 62b compress and thus dampen the pressure fluctuations.

In an in Fig. 9a In the fifth embodiment shown, a molding 48c of balance material is inserted into a liquid chamber 42c, and discharges about half of the liquid chamber 42c. The molded body 48c is held in a form-fitting manner in its edge region behind steps 68c of the housing structure 62c formed between a lower housing part 66c and an upper housing part 64c.

As a result of the prestressing of the molding 48c, this bulges somewhat into the region of the liquid chamber 42c filled by the treatment liquid in its middle region 70c. When compensating for pressure fluctuations in the treatment liquid, the extent of this curvature will change accordingly.

An in Fig. 10a shown sixth embodiment of a damping device 40d according to the invention is composed of an upper, a recess 72d having housing half 64d and a cover plate 66d. The upper housing part 64d is connected to the cover plate 66d so as to define together a liquid chamber 42d. Between the upper housing part 64d and the cover plate 66d, a thick, plate-shaped compensation element 48d is arranged such that it is clamped in its outer edge region 74d between the upper housing part 64d and the cover plate 66d. In this way, the compensation element 48d is not only securely fastened in the damping device 40d, but at the same time serves as a seal of the connection between the upper housing part 64d and the cover plate 66d. Similar to the fifth embodiment, the compensation element 48d of the sixth embodiment also bulges in its central region in the direction of the treatment liquid filled part of the liquid chamber 42d.

The in the Fig. 8a, 9a, 10a Damping devices shown are provided as flow devices with a liquid inlet and a liquid outlet. The Fig. 8b, 9b or 10b show the damping devices of the fourth, fifth and sixth embodiment respectively in the variant with only one fluid passage 60b, 60c and 60d, which is connected via a T-shaped branch 58b, 58c and 58d to a line connection.

The following are with reference to the Fig. 11 to 15 Embodiments 7 to 11 described, which are each constructed as flow-through devices with at least one arranged in a housing structure compensation element.

In detail, a damping device 40e comprises an in Fig. 11 7 shows a housing structure 62e which is composed of an upper housing part 64e and a lower housing part 66e, which define a liquid chamber 42e between them. In corresponding recesses 68e in the abutting area between the upper housing part 64e and the lower housing part 66e, a compensation element 48e is held in a form-fitting manner. The balancing member 48e divides the liquid chamber 42e into an upstream region 76e in communication with a liquid inlet 44e and a downstream region 78e in communication with a liquid outlet 46e. For the fluid exchange between the upstream region 76e and the downstream region 78e, the compensation element 48e has a throttle passage 80e, which has a defined flow cross section. So that this flow cross section does not change as a result of the compression or expansion of the compensation element 48e, it can, for. B. be reinforced by a metal sleeve or the like.

In the in Fig. 12 According to the eighth embodiment of the invention, a compensation element 48f is arranged as a partition in the middle of an elongated liquid chamber 42f and aligned along the flow direction of the treatment liquid, so that the treatment liquid laterally flows past the compensation element 48f. The compensating element 48f thus divides the liquid chamber 42f into two parallel flow channels, whose effective line cross-sections q, q are changed by elastic deformation of the compensating element 48f in accordance with the pressure of the treatment liquid. The flow of the treatment liquid in each flow channel can be limited by a respective throttle 80f arranged at the end of each flow channel. The wall 82f defining the outside of the liquid chamber 42f may be rigid or may be formed like a tube from a flexible material, which may likewise deform depending on the pressure of the treatment liquid.

A ninth embodiment of the damping device according to the invention is in Fig. 13 illustrated. In this damping device constructed of a compensating material, tubular damping element 48g is mounted in a housing structure 62g. The tubular compensating element 48g is surrounded by a housing wall 84g or else by a flexible outer tube, wherein between the housing wall / outer tube 84g and the outside of the tubular compensating element 48g an intermediate space 86g filled, for example, with air is left.

In the operational state of the damping device 40g, the tubular compensation element 48g is flowed through by treatment liquid, wherein pressure fluctuations occurring in the treatment liquid are damped in the radial direction by elastic deformation of the tubular compensation element 48g. The damping characteristic achieved is on the one hand by the elastic deformation of the tubular compensating element 48g and on the other hand influenced by the compression or expansion of the air present in the intermediate space 86g.

Similar to the eighth embodiment, in the ninth embodiment as well, the flow of the treatment liquid through the hose-shaped balance element 48g can be limited by a throttle 80g arranged at the end of the hose.

Furthermore, the shows Fig. 14 A tenth embodiment of a damping device according to the invention 40h, in which a molding 48h is arranged floatingly in a compensating material in a liquid chamber 42h defined by a housing structure 62h. The molding 48h is thus flowed around by treatment liquid on all sides, so that compressive forces acting on the molding 48h act uniformly from all sides. In such an arrangement, a particularly well-defined damping characteristic can be achieved. Furthermore, additional means for fastening the molded body 48h to the housing structure 62h can be dispensed with.

Fig. 15 shows an eleventh embodiment of a damping device 40i. In this embodiment, the largest part of the liquid chamber 42i is filled with equalization material 48i, wherein in the compensation material 48i channels 88i are formed for the passage of treatment liquid. The number and the course of the channels 88i can be chosen arbitrarily as long as a transport of treatment liquid from the liquid inlet 44i to the liquid outlet 46i remains ensured.

According to the embodiments 7 to 11 according to Fig. 11 to 15 It should also be noted that the respective housing structures defining the fluid chamber can also be formed by a section of the cable connection itself. Specifically, in an already existing, For example, conventional, section of a line connection compensation material are introduced, which in terms of its shape and mounting the embodiments of the Fig. 11 to 15 equivalent. The compensation material is then flowed around, flows through or passes through the treatment liquid and the damping device assumes a particularly simple shape. In this way, a damping device can also be particularly easy to retrofit in a machine of the type mentioned.

Although the present invention is not limited to a particular operating pressure, the embodiments of the invention have been found to be particularly advantageous for pressures ranging between about 1.5 bar and about 4 bar.

Fig. 16 schematically illustrates an embodiment of a trained according to the invention machine 100 for producing / processing a material web 110, especially a paper web 110. The machine 100 leads the running paper web 110 on both sides of the paper web 110 arranged nozzle weters 112 intermittently water. The nozzle dampers 112 are connected to a water feed 115 via a line connection 114. In order to dampen the pressure fluctuations which occur due to the pulsating operation of the nozzle dampers 112 in the line connection 114, damping devices 116 of the described type are connected to the connection lines 114 via T-branches 118.

Claims (20)

1. Machine (100) for the production/processing of a material web, in particular a fibrous web, for example of paper or board, which comprises at least one treatment section in which the material web can have a treatment fluid applied to it, the treatment section being connected or able to be connected to a treatment fluid source (115) via at least one line connection (41; 114), elastically deformable compensating material (48; 48a; 48b; 48c; 48d; 48e; 48f; 48g; 48h; 48i) being arranged in a fluid holding chamber (42; 42a; 42b; 42c; 42d; 42e; 42f; 42g; 42h; 42i) of the treatment fluid source or of the treatment section or a damping device (40; 40a; 40b; 40c; 40d; 40e; 40f; 40g; 40h; 40i; 116) connected to the line connection (41; 114) or arranged in the latter and/or delimiting such a fluid holding chamber (42; 42a; 42b; 42c; 42d; 42e; 42f; 42g; 42h; 42i), and/or elastically deformable compensating material (48; 48a; 48b; 48c; 48d; 48e; 48f; 48g; 48h; 48i) defining or co-defining, in at least one section of the line connection (41; 114), an effective line cross section, characterized in that the compensating material (48; 48a; 48b; 48c; 48d; 48e; 48f; 48g; 48h; 48i) is formed from an elastically deformable foam.
2. Machine (100) according to Claim 1, characterized in that the compensating material (48b; 48c; 48d; 48e; 48f; 48h; 48i) is arranged and designed in such a way that it is compressed in the event of a rising pressure of the treatment fluid.
3. Machine (100) according to Claim 1, characterized in that the compensating material (48; 48a; 48g) is arranged and formed in such a way that it is expanded in the event of a rising pressure of the treatment fluid.
4. Machine (100) according to one of the preceding claims, characterized in that the compensating material (48; 48a; 48b; 48c; 48d; 48e; 48f; 48g; 48h; 48i) forms at least one section of a delimiting wall of the fluid holding chamber (42b; 42c; 42d; 42g; 42i) or of the section of the line connection (42b; 42c; 42d; 42g; 42i) or at least one molding (48c; 48d; 48e; 48f; 48h; 48i) arranged in the fluid holding chamber (42c; 42d; 42e; 42f; 42h; 42i) or in a line cross section of the line connection (42c; 42d; 42e; 42f; 42h; 42i).
5. Machine (100) according to one of the preceding claims, characterized in that at least one compensating element (48; 48a; 48b; 48c; 48d; 48g) having the compensating material is provided, which is arranged in a housing structure (62b; 62c; 62d; 62g) and, on its own or together with the latter, delimits the fluid holding chamber (42; 42a; 42b; 42c; 42d; 42g).
6. Machine (100) according to one of the preceding claims, characterized in that at least one compensating element (48e; 48f; 48h) having the compensating material is arranged in the fluid holding chamber (42e; 42f; 42h) formed in a housing structure (62e; 82f; 62h).
7. Machine (100) according to Claim 6, characterized in that fluid can flow around and/or flow through the compensating element (48e; 48f; 48h; 48i) in the fluid holding chamber (42e; 42f; 42h; 42i).
8. Machine (100) according to one of the preceding claims, characterized in that at least one hose-like or sleeve-like compensating element (48; 48a; 48g) having the compensating material is provided, which accommodates treatment fluid or through which treatment fluid flows, in such a way that, in the event of a rising pressure of the treatment fluid, the effective line cross section of the compensating element (48; 48a; 48g) increases.
9. Machine (100) according to Claim 8, characterized in that the compensating element (48) is designed with a stabilizing means (52) surrounding the compensating material.
10. Machine (100) according to Claim 8 or Claim 9, characterized in that the compensating element comprises two or more concentrically arranged hose layers (48, 52), of which at least an inner hose layer (48) is formed of compensating material.
11. Machine (100) according to one of the preceding claims, characterized in that the compensating material (48; 48a; 48b; 48c; 48d; 48e; 48f; 48g; 48h; 48i) is formed from a silicone foam, EPDM elastomer foam, polyethylene foam or polypropylene foam.
12. Machine (100) according to Claim 11, characterized in that the foam is a closed-cell foam or a foam having an outer layer which is substantially impermeable to treatment fluid.
13. Machine (100) according to Claim 11 or Claim 12, characterized in that the foam has a Shore hardness of approximately 6 Shore A to approximately 18 Shore A, preferably of approximately 10 Shore A to approximately 18 Shore A.
14. Machine (100) according to one of the preceding claims, characterized in that the fluid holding chamber (42; 42a; 42b; 42c; 42d; 42e; 42f; 42g; 42h; 42i) is connected via at least one fluid inlet (44; 44b; 44e; 44i) to an upstream section of the line connection (41) and via at least one fluid outlet (46; 46b; 46e; 46i) to a downstream section of the line connection (41).
15. Machine (100) according to one of Claims 1 to 13, characterized in that the fluid holding chamber (42b; 42c; 42d) has a fluid passage (60b, 60c, 60d) which is connected to the line connection (114), branching off the latter.
16. Machine (100) according to one of the preceding claims, characterized in that the flow of the treatment fluid can be limited by at least one throttling device (80e; 80f; 80g) assigned to the fluid holding chamber (42e; 42f; 42g) or to the section of the line connection.
17. Machine (100) according to one of the preceding claims, characterized in that the throttling device (80e) is accommodated in the compensating material (48e).
18. Machine (100) according to one of the preceding claims, characterized in that the treatment section is arranged in a drying section or before a calender of the machine.
19. Machine (100) according to one of the preceding claims, characterized in that the treatment fluid is a treatment liquid, in particular water.
20. Damping device (116) to be arranged in or connected to a line connection (114) between a fluid source (115) and a device to be supplied with fluid, formed by elastically deformable compensating material, which is arranged in and/or delimits a fluid holding chamber of the damping device (116), chraracterized in that the compensating material (48, 48a; ...) is formed from an elastically deformable foam.

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