EP3491186B1 - Module d'écoulement et procédé de production d'un module d'écoulement pour une caisse de tête d'une machine à papier - Google Patents

Module d'écoulement et procédé de production d'un module d'écoulement pour une caisse de tête d'une machine à papier Download PDF

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Publication number
EP3491186B1
EP3491186B1 EP17736939.4A EP17736939A EP3491186B1 EP 3491186 B1 EP3491186 B1 EP 3491186B1 EP 17736939 A EP17736939 A EP 17736939A EP 3491186 B1 EP3491186 B1 EP 3491186B1
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Prior art keywords
flow
grid
module
headbox
modules
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EP17736939.4A
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German (de)
English (en)
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EP3491186A1 (fr
Inventor
Wolfgang Ruf
Konstantin Fenkl
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Voith Patent GmbH
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Voith Patent GmbH
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/026—Details of the turbulence section

Definitions

  • the invention relates to a flow module for a headbox of a machine for producing a fibrous web for the passage of a fibrous suspension according to the preamble of claim 1 and a flow grid according to the preamble of claim 11.
  • a method for producing a flow module and a method for producing a flow grid are also part of the invention.
  • WO20028/105714 discloses a structural element for a functional part of a headbox for a paper machine.
  • the structural element comprises several adjacent blocks with flow channels.
  • the blocks are arranged in front of the nozzle of the headbox. Spaces are provided between the blocks to compensate for thermal expansion.
  • the blocks are made by casting.
  • the document DE10234559 A1 also discloses a headbox with a turbulence generator located in front of the nozzle and made of a plastic block with flow channels.
  • the flow channels can be produced when the plastic block is cast. However, they can also be formed by machining.
  • a turbulence generator of a headbox for a paper machine is in the document DE102009045221 A1 disclosed.
  • the turbulence generator consists of several individual modules, which in turn consist of several individual tubes exist.
  • the structure simplifies the control of the expansion forces in the headbox nozzle and the reduction of the bending stress in the top plate.
  • the font DE 19905716 A1 also discloses a headbox with a sectioned central part located in front of the nozzle. The sections are clamped together with tie rods. Three flow channels, one on top of the other, extend through the central part and are fed with different material flows and brought together and mixed at the end of the central part. This creates turbulence.
  • Flow modules for a headbox of a machine for the production of a fibrous web for the passage of a fibrous suspension are known.
  • EP2518211 B1 discloses a distribution grid comprising individual modules with a plurality of distribution channels arranged one above the other. The individual modules are arranged between two perforated panels. The distribution grid is fed with pulp suspension via a distribution pipe. After the distributor grid, an intermediate channel is arranged with a further flow grid connected thereto and a nozzle. The individual modules of the distribution grid are arranged next to one another at a distance from one another, forming an intermediate space. The intermediate space is used to feed dilution water into the distribution channels of the individual modules.
  • the individual modules are preferably made from a material (plastic) that is easy to process.
  • this known solution is unsuitable for use as a flow grid immediately before the nozzle, ie as a turbulence generator, since the den Individual modules downstream perforated plate would produce the paper quality disturbing turbulence.
  • the installation effort for these flow grids is also considerable due to the large number of parts.
  • Another significant disadvantage are the gaps between the individual elements of the flow grid. These harbor the risk of fiber accumulations forming, which in turn can sporadically detach and lead to web breaks in the paper machine.
  • Claim 1 describes a flow module for a headbox of a machine for producing a fibrous web for the passage of a fibrous suspension, comprising at least two flow channels with an inflow side and an outflow side.
  • the invention is characterized in that at least one connecting element having a connecting surface is provided on the outflow side for direct connection to the corresponding connecting element of at least one further flow module, and that the flow module is produced in one piece by an additive manufacturing process.
  • This construction of the flow module from one piece has no gaps in the flow area of the fibrous suspension and is therefore not susceptible to contamination and disturbances during operation of the headbox when used in a headbox.
  • the design of the connecting elements between two adjacent flow modules can be coordinated with one another using the additive manufacturing process and can be easily produced in any required form. No machining manufacturing processes are necessary and the material used from which the flow module is made can be used almost entirely. There is therefore hardly any material waste.
  • the shape of the flow cross sections of the flow channels on the outflow side and the partition walls between adjacent flow channels can be produced with high dimensional accuracy. This is particularly advantageous when the flow module is used in a flow grid that is arranged directly in front of the nozzle of a headbox.
  • the solution also enables several flow modules to be assembled into a flow grid with reduced effort.
  • the flow grid formed in this way has no gaps in the flow area of the fibrous suspension, in particular in the flow channels from the inflow side to the outflow side.
  • the length of the individual flow modules corresponds to the length of the flow grid formed in the flow direction of the fibrous suspension.
  • individual flow modules can be connected to form a flow grid by known methods such as welding, gluing, soldering, clamping together, for example by means of tie rods.
  • the connection point is formed by the connection surface of the connection elements.
  • the design of the connecting elements and the connecting surfaces of the flow modules to be connected are coordinated so that on the one hand no gaps occur and on the other hand the strength requirements with regard to the influences of pressure and mechanical effects are met.
  • the connecting elements can also be connected to one another in a form-fitting manner.
  • the connecting elements can have a dovetail connection, or a bayonet connection, or a tongue and groove connection, or a bore and bolt connection. Due to their design, these connections can also fulfill the function of a positioning aid. As a result, the flow modules can be assembled quickly and precisely.
  • fastening elements for connection to adjacent flow modules and/or for connection to the headbox can be attached as an integral part of a flow module during production.
  • At least one connecting element having a connecting surface is provided on the inflow side for connecting to the corresponding connecting element of at least one further flow module.
  • adjacent flow channels are separated from one another on the outflow side by a partition and the distance between the connecting surface and an adjacent flow channel assumes a value in the range of 0.2 to 0.8 times the wall thickness of the partition.
  • the distance between the connecting surface and an adjacent flow channel in this case an external flow channel of the flow module, corresponds approximately to the wall thickness of the external flow channel of the flow module.
  • the wall thickness of the partition can be in the range of 0.2 mm to 2 mm, in particular between 0.5 mm and 1.5 mm. This has an advantageous effect in particular when turbulence is used. The flow into the headbox nozzle is thus evened out and disruptive separation vortices at the web ends are reduced or even avoided.
  • the additive manufacturing process is preferably selected from the following group: metal printing, laser deposition welding, three-dimensional printing processes, selective laser sintering, selective laser melting, which is also known by the English term “powder bed fusion”. Standards for this were created by ASTM (American Society for Testing and Materials). Stainless steel is preferably used as the material, since this material has the required strength and at the same time meets the requirements of the suspensions with regard to, for example, chemical resistance and susceptibility to contamination of the flow channels in a headbox.
  • the flow module comprises at least 3, in particular at least 6, preferably at least 12 flow channels.
  • the division of the flow channels in the horizontal and/or vertical direction can be in a range from 10 mm to 30 mm, in particular from 15 mm to 25 mm. This can apply to the division of the flow channels on the inflow side and/or on the outflow side. A small pitch is also beneficial for good flow quality without coarse vortices.
  • the at least one inflow-side and/or outflow-side connecting element of at least one flow module has at least one fastening device for force application.
  • the fastening device can include a continuous opening for receiving a tie rod or a thread.
  • the at least one inflow-side and/or at least one outflow-side connecting element When using dilution water technology, it is possible for the at least one inflow-side and/or at least one outflow-side connecting element to have at least one supply opening for supplying a fluid, such as white water as dilution water for adjusting the cross-section of the mass per unit area of the paper web produced, into at least one of the flow channels .
  • a fluid such as white water as dilution water
  • the flow module remains compact and can be produced simply and in one piece using the additive manufacturing process.
  • the at least one inflow-side and/or at least one outflow-side connecting element has a fold, which preferably runs in the z-direction, for receiving a correspondingly complementary connecting element of a further adjacent flow module.
  • this folded connection enables a form-fitting connection and, on the other hand, an asymmetrical arrangement in the horizontal direction of the connecting surfaces to the flow channels of the flow modules. Since the stagnation point of the inflow of the flow grid is symmetrical to the flow channels, thus the contamination-prone separating joints between the connecting surfaces between two flow modules are arranged outside the stagnation point. The risk of fiber wiping between the connecting surfaces is thus reduced or even avoided.
  • the flow channels can have an oval flow cross section on the inflow side. This enables the realization of small pitches for a good flow quality after the flow grid, without having to take the risk of the formation of fiber bridges due to too small land areas between the upstream flow channels.
  • the oval flow cross section can preferably transition into a round flow cross section in the course of the flow direction.
  • the area ratio of the oval flow cross section to the round flow cross section can be between 0.1 and 10, in particular between 0.1 and 1.
  • the flow channels on the outflow side can have a rectangular and/or a square flow cross section.
  • the flow channels on the outflow side can have a hexagonal and/or a pentagonal flow cross section.
  • the shape of the flow cross section of the flow channels on the outflow side has radii in the range between 0.2 mm and 3 mm. The velocity profile is thereby evened out over the flow cross-section and the formation of disruptive vortices in the wake of the flow cascade is avoided.
  • the flow module can also be equipped with fastening elements. These can be designed, for example, as through openings or as threaded holes.
  • the fastening devices extending in the z-direction can be used to fasten the flow module to the headbox.
  • the flow module can also be designed and dimensioned in such a way that the flow module itself serves as a tie rod in conjunction with the fastening devices extending in the z-direction for absorbing the expansion forces generated by the pressurized nozzle.
  • Claim 8 relates to a flow grid for a headbox of a machine for producing a fibrous web for the passage of a fibrous suspension with a plurality of flow channels arranged transversely to the flow direction next to one another or next to one another and one above the other.
  • the flow grid comprises a plurality of flow modules according to claim 1.
  • the flow grid has a height and a width.
  • the flow modules are designed such that they each extend over the entire height and entire length of the flow grid and are arranged next to one another in the width direction and form the flow grid. The length is measured in the flow direction of the flow module or flow grid.
  • the flow modules have one or more lamella holders designed as slots for mechanically receiving separating lamellae.
  • the lamella holders preferably extend over the entire width of the flow grid.
  • the flow grid has a height and a width.
  • the flow modules can be designed in such a way that a plurality of flow modules are arranged next to one another in the height direction and in the width direction of the flow grid and form the flow grid.
  • the length of the flow modules corresponds to the length of the flow grid.
  • the lamellar holders designed as slots can each be formed by two flow modules arranged one above the other.
  • the upper flow module can form the upper part and the lower flow module can form the lower part of the blade holder.
  • the flow grid can each comprise at least one edge flow module on its two edges lying transversely to the flow direction.
  • the edge flow module can differ from the flow module in terms of its width. This can apply when the width of the flow grid is not a multiple of the width of a flow module. In this case, the width of the edge flow modules is adjusted in such a way that the width of all flow modules together with the edge flow modules results in the width of the flow grid. It is also conceivable that the division and/or the width and/or the number of flow channels of an edge flow module also differ from those of a flow module.
  • the edge flow modules can be designed in such a way that a separate supply of a fluid, for example a fibrous stock suspension, is possible, independent of the remaining flow modules.
  • This separate volume flow can have a different composition and/or a variable and controllable throughput. In this way, for example, the mass per unit area and/or the fiber orientation in the paper can be influenced.
  • the distance between the outer surface at the edge and a flow channel at the edge and the wall thickness of the partition wall at the edge between flow channels at the edge of the edge flow module can be greater than the corresponding dimensions of a flow module.
  • Claim 11 relates to a flow grid for a headbox of a machine for producing a fibrous web for the passage of a fibrous suspension with a plurality of flow channels arranged transversely to the flow direction next to one another or next to one another and one above the other.
  • the solution is characterized by the fact that the flow grid is manufactured in one piece using an additive manufacturing process.
  • a headbox for a machine for producing a fibrous web in particular a paper, tissue or cardboard web
  • a distributor for a machine for producing a fibrous web, in particular a paper, tissue or cardboard web
  • a turbulence generator and a nozzle according to claim 12.
  • the solution is characterized in that the turbulence generator is designed as a flow grid according to Claim 8 or Claim 11 and is arranged directly in front of the nozzle as viewed in the direction of flow.
  • an intermediate channel is arranged in front of the turbulence generator and a tubular grid is arranged in front of the intermediate channel, the tubular grid being designed as a flow grid according to claim 8 or claim 11 .
  • the object is also achieved by a method according to claim 14. It is a method for producing a flow module for a headbox of a machine for producing a fibrous web for the passage of a fibrous suspension, comprising at least two flow channels with an inflow side and an outflow side, and on the inflow side at least one connecting element having a connecting surface for direct connection to the corresponding connecting element at least one further flow module is provided, the flow module being produced in one piece by an additive manufacturing process.
  • the figure 1 shows a first embodiment of a flow module 1 according to the invention in a three-dimensional representation.
  • the flow module 1 comprises three flow channels 3 in a row in the horizontal direction 11 and four flow channels 3 in the z direction 12, i.e. in the vertical direction. All flow channels 3 have a rectangular flow cross section on the outflow side 6 and a round flow cross section on the inflow side 5.
  • the flow module On its outflow side 6 , the flow module has on both sides a connecting element 8 having a connecting surface 7 for direct connection to the corresponding connecting elements of adjacent flow modules 1 or edge flow modules 2 .
  • the division of the flow channels 3, 3′ can be made smaller than in known designs, taking into account the geometric requirements for the flow grid 20 of a headbox 21.
  • the connecting elements 8 are very thin and form the outflow walls of the external flow channels 3'.
  • the division 14, 15 of the flow channels 3, 3' can be in the horizontal and/or vertical direction in a range from 10 mm to 30 mm, in particular from 15 mm to 25 mm. This can apply to the division 14, 15 of the flow channels 3, 3' on the inflow side and/or on the outflow side. In this example, the horizontal pitch 14 is 18mm.
  • a small division 14, 15 is also advantageous for a good flow quality without coarse vortices.
  • Adjacent flow channels 3, 3' are separated from one another by a partition wall 9.
  • the wall thickness of the partition 9 can be in the range from 0.5 mm to 2 mm, in particular between 0.5 mm and 1.5 mm. In this example it is 1.2 mm. This has an advantageous effect in particular when turbulence is used. The flow into the headbox nozzle is thus evened out and disruptive separation vortices at the web ends are reduced or even avoided.
  • the distance 10 between the connecting surface 7 and an adjacent flow channel 3′ corresponds to the wall thickness of the external flow channel 3′ of the flow module and can be made very small and independent of the wall thickness of the partition wall 9 using the additive manufacturing process.
  • the distance 10 between the connecting surface 7 and an adjacent flow channel 3' has a value in the range of 0.2 to 0.8 times the wall thickness of the partition wall 9. In this example, the distance 10 is 0.6 mm, which is 0. 5 times the wall thickness of the partition wall 9.
  • the flow module 1 has fastening devices 18 in this example. They are designed as through holes to accommodate a tie rod. In this way, several flow modules can be clamped together to form a flow grid 20 .
  • the connecting surfaces 7 extend from the upstream side 5 to the downstream side 6. The elements described are more integral. Part of the one-piece flow module 1.
  • the Figures 2a to 2c each show further exemplary embodiments of a flow module or flow grid according to the invention in a representation sectioned in flow direction 13 .
  • lamellae 26 are shown on the outflow side 6, which are each fastened in a lamellar holder 4 formed by the additive manufacturing process.
  • the flow channels 3 have a square cross section on the outflow side and a round flow cross section on the inflow side.
  • the flow grid 20 formed has no gaps in the flow area of the fibrous suspension, in particular in the flow channels 3 from the inflow side to the outflow side.
  • the length of the individual flow modules 1, 1' corresponds to the length of the flow grid 20 formed in the flow direction of the fibrous suspension.
  • the one-piece flow module 1 in Figure 2a comprises three superimposed rows of flow channels 3.
  • FIG. 2b three flow modules 1 are arranged one above the other and are connected to one another in rows to form a flow grid 20 by the connecting elements 8 having connecting surfaces 7 .
  • the blade holder 4 are half in itself opposite connecting elements formed.
  • the connecting elements 8 of a flow module 1 can each have contours complementary to the opposite connecting elements 8 for the form-fitting connection of two flow modules 1 .
  • the one in the Figure 2c The embodiment of a flow module 1 shown corresponds to the embodiment in FIG Figure 2a .
  • Fastening devices 18 designed as through-holes are also provided in the horizontal direction 11 and in the z-direction 12, which can also be used for the embodiment in FIG Figure 2b can be present.
  • the fastening devices 18 allow several flow modules to form a flow grid 20 in the horizontal direction 11 and/or in the z-direction 12 for the embodiment Figure 2b clamp together.
  • the figure 3 shows a possible embodiment of the lamellar holder 4 of a flow module 1, in particular a peripheral flow module 2.
  • the lamellar holder 4 extends over the entire width of the flow grid 20.
  • the lamellae have to be replaced from time to time.
  • the ends of the slats for installation are pushed laterally into the slat holder 4, which is designed like a groove.
  • the flow module 1 or at least the edge flow module 2 has an entry slope 4 ′ at the side opening of the lamella holder 4 .
  • the groove width 28 of the lamella holder 4, measured in the z-direction, is in the range between 1 mm and 10 mm at the narrowest point.
  • the flow modules and peripheral flow modules are designed in such a way that the distance 29, measured in the z-direction, between adjacent flow channels 3, 3' is in the range between 3 mm and 15 mm. This also applies to the case in which two flow modules 1 are arranged one above the other in accordance with Figure 2b shown version.
  • a section of a flow grid 20 of the outflow side 6 is shown in plan view with the connection point of two flow modules 1, 1'.
  • the connecting surfaces 7 of the connecting elements 8 meet directly at the connection points.
  • the connection is made by welding.
  • the flow modules are made of stainless steel.
  • FIG 4b is also an outflow-side detail from a flow grid 20 in plan view with the connection point of two flow modules 1, 1 'shown.
  • the connecting surfaces 7 of the connecting elements 8 meet directly at the connection points.
  • the connection is established by gluing the connecting surfaces 7 together.
  • the flow modules are made of plastic.
  • the figure 5 shows an embodiment of a flow grid 20 in a simplified three-dimensional representation.
  • the flow grid 20 is composed of two flow modules 1, 1', which are arranged next to one another in the horizontal direction 11. These flow modules 1, 1' are designed as edge flow modules 2. If, due to the width 16 of the headbox 21, several flow modules 1, 1' are necessary and the flow grid 20 is thus composed of additional flow modules 1, 1', further flow modules 1, 1' are arranged between these edge flow modules 2.
  • the flow channels 3, 3' have a square flow cross-section on the outflow side 6. As it progresses in the direction of the inflow side 5, this flow cross section changes into a round shape.
  • the flow modules 1 or edge flow modules 2 also have connecting elements 8, which with the connecting surfaces 7 lie directly against the connecting surfaces 7 of the connecting elements 8 of the respectively adjacent flow module 1'.
  • the flow grid 20 is preceded by a distributor 22 for the supply of pulp suspension.
  • Known designs such as, for example, transverse distributors, circular distributors, hose distributors can be provided as distributors 22 .
  • FIG. 6a to 6c further possible embodiments of flow grid 20 with differently designed and arranged flow modules 1, 1' are shown.
  • a flow module 1 extends over the entire height 17 of the flow grid 20.
  • Across the width 16 of the flow grid 20, a multiplicity of flow modules 1, 1' are arranged.
  • the flow modules 1 , 1 ′ each have a connecting element 8 having a connecting surface 7 on both sides on their outflow sides 6 for direct connection to the corresponding connecting elements of adjacent flow modules 1 .
  • the connecting elements 8 and extend Connecting surfaces 7 from the inflow side 5 to the outflow side 6.
  • the flow modules 1, 1' each comprise at least four flow channels 3, 3', which are arranged in the horizontal direction 11. Over the height 17 of the flow grid 20, four of these flow modules 1, 1' are arranged in a stack. Several of these stacks are in turn arranged next to one another over the width 16 and connected to one another as already described. While in the embodiments according to the Figures 6a and 6b have uniform flow modules 1, 1 ', the flow grid 20 in the in Figure 6c illustrated embodiment two different flow modules 1, 1 '. The shape, geometry and number of flow channels 3, 3' of the individual flow modules 1, 1' are selected in such a way that together they form a flow grid 20. The geometry and size of the flow channels 3, 3' are essentially the same for all flow modules 1, 1'. One flow module 1, 1' includes 8 flow channels 3, 3', while the other flow module 1, 1' includes four flow channels 3, 3'.
  • the edge flow modules 2 can differ in geometry and in particular in the wall thicknesses of the flow modules 1, 1'.
  • the figure 7 1 shows an example of an embodiment of a peripheral flow module 2.
  • the partition walls 9 between adjacent flow channels 3, 3' are made thicker than those of the flow modules 1, 1'. This may be necessary because of the increased mechanical stress on the edge flow module 2 .
  • This also applies to the design of the distance between the peripheral outer surface 2' and a peripheral flow channel 2", i.e. for the wall thickness of a peripheral flow channel 2", as well as for the wall thickness of the peripheral partition 9' between peripheral flow channels 2" of the peripheral flow module 2.
  • the figure 8 shows an embodiment of a flow grid 20 in a simplified three-dimensional representation.
  • the flow grid 20 is composed of more than two flow modules 1, 1', which are arranged next to one another in the horizontal direction 11.
  • One of these flow modules 1 , 1 ′ is designed as an edge flow module 2 .
  • the flow channels 3, 3' have a square flow cross-section on the outflow side 6. As it progresses in the direction of the inflow side 5, this flow cross section changes into a round shape.
  • the flow modules 1 or edge flow modules 2 are in contrast to each other figure 5 no fasteners 8 on.
  • the flow channels have a round, tubular outer contour, which can be mechanically and/or hydraulically connected to devices such as attachable tubes or perforated plates.
  • FIGS 9a and 9b show a view of the inflow sides of two embodiments of flow grids 20.
  • Fastening devices 18 designed as through-holes are provided in the horizontal direction 11 and in the z-direction 12 .
  • the fastening devices 18 allow a plurality of flow modules to be installed on the inflow side of a flow grid 20 in the horizontal direction 11 and/or in the z-direction 12 for the embodiment Figure 2b clamp together using a tie rod, for example.
  • fastening devices 18 designed as threaded bores can also be provided.
  • the flow grid 20 can thus be connected to the headbox 21 .
  • connection can also be used to control expansion forces in the area of the pressurized nozzle, with the flow grid 20 or the flow module 1, 1' acting as a tie rod to absorb the expansion forces.
  • the connecting elements 8 supply openings 19 and supply channels for supplying, for example, dilution water in the flow channels 3, 3 '.
  • all flow channels 3, 3' or only some of the flow channels 3, 3' of the flow modules 1, 1' can be connected to the feed openings 19.
  • the feed openings 19 can also be arranged on the underside.
  • FIG 10 shows an embodiment of a headbox with flow modules in a simplified three-dimensional representation.
  • the headbox 21 comprises a distributor 22 designed as a transverse distributor, which is connected to a tube grid 23. This is followed by an intermediate channel 24, which in turn is connected to a turbulence generator 25.
  • the turbulence generator is arranged directly in front of a nozzle 27 and has no lamellae 26 in this example.
  • the tubular grid 23 and/or the turbulence generator 25 can be designed as a flow grid 20 which comprises a plurality of flow modules 1, 1′.
  • the tube grid and the turbulence generator extend over the entire width 16 of the headbox 21.

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Claims (15)

  1. Module d'écoulement (1, 1') pour une grille d'écoulement d'une caisse de tête (21) d'une machine pour la fabrication d'une bande de matière fibreuse pour le passage d'une suspension de matière fibreuse, comprenant des canaux d'écoulement (3, 3') avec un côté d'entrée (5) et avec un côté de sortie (6), au moins un élément de liaison (8) présentant une surface de liaison (7) étant prévu côté sortie pour la liaison directe avec l'élément de liaison (8) correspondant d'au moins un autre module d'écoulement (1, 1'), et en ce que le module d'écoulement (1, 1') est fabriqué d'une seule pièce par un procédé de fabrication additive,
    caractérisé en ce que
    le module d'écoulement (1, 1') comprend au moins deux canaux d'écoulement (3, 3').
  2. Module d'écoulement (1, 1') selon la revendication 1,
    caractérisé en ce que
    du côté de l'écoulement entrant, il est prévu au moins un élément de liaison (8) présentant une surface de liaison (7) pour la liaison avec l'élément de liaison (8) correspondant d'au moins un autre module d'écoulement (1, 1').
  3. Module d'écoulement (1, 1') selon la revendication 1,
    caractérisé en ce que
    des canaux d'écoulement voisins (3, 3') sont séparés l'un de l'autre du côté de l'écoulement sortir par une paroi de séparation (9) et du côté de l'écoulement sortir, la distance (10) entre la surface de liaison (7) et un canal d'écoulement voisin (1') a une valeur dans la plage de 0,2 fois à 0,8 fois l'épaisseur de paroi de la paroi de séparation (9).
  4. Module d'écoulement (1, 1') selon la revendication 3,
    caractérisé en ce que
    l'épaisseur de la paroi de séparation (9) se situe dans la plage de 0,2 mm à 2 mm, en particulier entre 0,5 mm et 1,5 mm.
  5. Module d'écoulement (1, 1') selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le procédé de fabrication additive est choisi dans le groupe suivant : impression métallique, soudage par dépôt laser, procédé d'impression tridimensionnelle, frittage sélectif par laser, fusion sélective par laser ("Powder Bed Fusion"), le matériau utilisé étant de préférence de l'acier inoxydable ou du plastique.
  6. Module d'écoulement (1, 1') selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le module d'écoulement (1, 1') comprend au moins 5, en particulier au moins 15, de préférence au moins 20 canaux d'écoulement (3, 3').
  7. Module d'écoulement (1, 1') selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le au moins un élément de liaison (8) côté entrée et/ou côté sortie présente au moins un dispositif de fixation (18), en particulier une ouverture pour recevoir un tirant ou en particulier un filetage, pour l'introduction de la force.
  8. Grille d'écoulement (20) pour une caisse de tête d'une machine pour la fabrication d'une bande de matière fibreuse pour le passage d'une suspension de matière fibreuse avec plusieurs canaux d'écoulement (3, 3') disposés les uns à côté des autres ou les uns à côté des autres et les uns au-dessus des autres transversalement à la direction d'écoulement,
    caractérisé en ce que
    la grille d'écoulement (20) comprend plusieurs modules d'écoulement (1, 1') selon la revendication 1.
  9. Grille d'écoulement (20) selon la revendication 8,
    caractérisé en ce que
    la grille d'écoulement (20) présente une hauteur (17) et une largeur (16) et en ce que les modules d'écoulement (1, 1') sont réalisés de telle sorte qu'ils s'étendent chacun sur toute la hauteur (17) de la grille d'écoulement (20) et sont disposés les uns à côté des autres dans le sens de la largeur.
  10. Grille d'écoulement (20) selon la revendication 8,
    caractérisé en ce que
    la grille d'écoulement (20) présente une hauteur (17) et une largeur (16) et en ce que les modules d'écoulement (1, 1') sont conçus de telle sorte que plusieurs modules d'écoulement (1, 1') sont respectivement disposés les uns à côté des autres dans le sens de la hauteur et dans le sens de la largeur de la grille d'écoulement.
  11. Grille d'écoulement (20) pour une caisse de tête (21) d'une machine pour la fabrication d'une bande de matière fibreuse pour le passage d'une suspension de matière fibreuse avec plusieurs canaux d'écoulement (3, 3') disposés l'un à côté de l'autre ou l'un à côté de l'autre et l'un au-dessus de l'autre transversalement à la direction d'écoulement (13), la grille d'écoulement (20) étant réalisée comme générateur de turbulences et/ou comme grille tubulaire et s'étendant sur toute la largeur de la caisse de tête,
    caractérisé en ce que
    la grille d'écoulement (20) est fabriquée d'un seul tenant par un procédé de fabrication additive.
  12. Caisse de tête (21) pour une machine de fabrication d'une bande de matière fibreuse, en particulier une bande de papier, de papier tissu ou de carton, comprenant un distributeur (22), un générateur de turbulences et une buse (27),
    caractérisé en ce que
    le générateur de turbulences est réalisé sous la forme d'une grille d'écoulement (20) selon la revendication 8 ou la revendication 11 et est disposé, vu dans la direction d'écoulement (13), directement en amont de la buse (27).
  13. Caisse de tête (21) selon la revendication 12,
    caractérisé en ce que
    un canal intermédiaire (24) est disposé avant le générateur de turbulences, vue dans la direction d'écoulement (13), et une grille tubulaire (23) est disposée avant le canal intermédiaire (24), la grille tubulaire (23) étant réalisée sous forme de grille d'écoulement (20) selon la revendication 8 ou la revendication 11.
  14. Procédé de fabrication d'un module d'écoulement (1, 1') pour une grille d'écoulement d'une caisse de tête (21) d'une machine de fabrication d'une bande de matière fibreuse pour le passage d'une suspension de matière fibreuse, comprenant des canaux d'écoulement (3, 3') avec un côté d'entrée d'écoulement (5) et avec un côté de sortie d'écoulement (6), ainsi que, côté sortie, au moins un élément de liaison (8) présentant une surface de liaison (7) pour la liaison directe avec l'élément de liaison (8) correspondant d'au moins un autre module d'écoulement (1, 1'),le module d'écoulement (1, 1') étant fabriqué d'un seul tenant par un procédé de fabrication additive,
    caractérisé en ce que
    comprend au moins deux canaux d'écoulement (3, 3').
  15. Procédé pour la fabrication d'une grille d'écoulement (20) pour une caisse de tête (21) d'une machine pour la fabrication d'une bande de matière fibreuse pour le passage d'une suspension de matière fibreuse avec plusieurs canaux d'écoulement (3, 3') disposés l'un à côté de l'autre ou l'un à côté de l'autre et l'un au-dessus de l'autre transversalement à direction d'écoulement (13) et où la grille d'écoulement (20) est réalisée comme générateur de turbulences et/ou comme grille tubulaire et s'étend sur toute la largeur de la caisse de tête,
    caractérisé en ce que
    la grille d'écoulement (20) est fabriquée d'un seul tenant par un procédé de fabrication additive,
EP17736939.4A 2016-07-29 2017-07-07 Module d'écoulement et procédé de production d'un module d'écoulement pour une caisse de tête d'une machine à papier Active EP3491186B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016114040.6A DE102016114040A1 (de) 2016-07-29 2016-07-29 Strömungsmodul und Verfahren zur Herstellung eines Strömungsmoduls für einen Stoffauflauf einer Papiermaschine
PCT/EP2017/067052 WO2018019545A1 (fr) 2016-07-29 2017-07-07 Module d'écoulement et procédé de production d'un module d'écoulement pour une caisse de tête d'une machine à papier

Publications (2)

Publication Number Publication Date
EP3491186A1 EP3491186A1 (fr) 2019-06-05
EP3491186B1 true EP3491186B1 (fr) 2023-03-01

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Country Status (6)

Country Link
EP (1) EP3491186B1 (fr)
CN (1) CN109477300B (fr)
DE (1) DE102016114040A1 (fr)
FI (1) FI3491186T3 (fr)
PL (1) PL3491186T3 (fr)
WO (1) WO2018019545A1 (fr)

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DE102018120820A1 (de) * 2018-08-27 2020-02-27 Voith Patent Gmbh Turbulenzeinsatz
CN110761106B (zh) * 2019-11-21 2024-05-14 宁波华辰机械有限公司 一种高速新月形流浆箱
DE102020103003A1 (de) 2020-02-06 2021-08-12 Voith Patent Gmbh Strömungsgitter und Verfahren zur Herstellung eines Strömungsgitters
CN115867697A (zh) * 2020-05-29 2023-03-28 金伯利-克拉克环球有限公司 用于制造基材的流浆箱

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FI98938C (fi) * 1996-06-20 1997-09-10 Valmet Corp Laitteisto laimennusvirtauksen yhdistämiseksi paperikoneen/kartonkikoneen jakotukista johdettuun massavirtaukseen
DE19905716A1 (de) * 1999-02-11 2000-08-17 Voith Sulzer Papiertech Patent Verfahren zur Erzeugung von Turbulenzen in einem Stoffstrom eines Ein- oder Mehrlagen-Stoffauflaufs und Stoffauflauf
DE10234559A1 (de) * 2002-07-30 2004-02-19 Voith Paper Patent Gmbh Blattbildungssystem
CN101622399B (zh) * 2007-03-01 2012-10-17 梅特索·佩珀·卡尔斯塔德公司 纸幅制造机中的流浆箱的功能部件所用的结构元件、功能部件和由其制造的流浆箱以及相关方法
DE102009045221A1 (de) * 2009-09-30 2011-03-31 Voith Patent Gmbh Turbulenzerzeuger für einen Stoffauflauf, Stoffauflauf und Verfahren zur Herstellung des Turbulenzerzeugers
DE102009055229A1 (de) * 2009-12-23 2011-06-30 Voith Patent GmbH, 89522 Stoffauflauf
DE102010001610A1 (de) * 2010-02-05 2011-08-11 Voith Patent GmbH, 89522 Stoffauflauf und Blattbildungseinheit mit einem Stoffauflauf
FI122895B (fi) * 2010-12-21 2012-08-31 Metso Paper Inc Virtausputki kuiturainakoneen perälaatikon turbulenssigeneraattoria varten ja kuiturainakoneen perälaatikon turbulenssigeneraattori
FI20115407A (fi) * 2011-04-28 2012-10-29 Vaahto Oy Paperikoneen perälaatikon yhteydessä oleva jakokanavisto
CN203715990U (zh) * 2013-12-30 2014-07-16 宋俊富 一种造纸机用流浆装置
CN104120615A (zh) * 2014-07-23 2014-10-29 西安维亚造纸机械有限公司 一种水力式流浆箱

Also Published As

Publication number Publication date
WO2018019545A1 (fr) 2018-02-01
EP3491186A1 (fr) 2019-06-05
DE102016114040A1 (de) 2018-02-01
FI3491186T3 (fi) 2023-05-24
CN109477300B (zh) 2021-08-20
PL3491186T3 (pl) 2023-06-05
CN109477300A (zh) 2019-03-15

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