WO2007003698A1 - A strip means and an improved suction roll for a material web machine and an arrangement and a method for improving the duration of the suction roll - Google Patents
A strip means and an improved suction roll for a material web machine and an arrangement and a method for improving the duration of the suction roll Download PDFInfo
- Publication number
- WO2007003698A1 WO2007003698A1 PCT/FI2006/050285 FI2006050285W WO2007003698A1 WO 2007003698 A1 WO2007003698 A1 WO 2007003698A1 FI 2006050285 W FI2006050285 W FI 2006050285W WO 2007003698 A1 WO2007003698 A1 WO 2007003698A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- strip
- strip element
- facing surface
- suction roll
- loading
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/10—Suction rolls, e.g. couch rolls
Definitions
- the present invention generally relates to material web machines, such as fibre web machines.
- Fibre web machines include paper machines, tissue machines, board machines and pulp machines, for example.
- the present invention relates to a strip means and a suction roll for a material web machine for improving the duration of the suction roll and an arrangement and a method for improving the duration of the suction roll.
- the attribute "material web machine” generally refers to processing machines for all kinds of web-like materials.
- the general attribute “material web machine” will be used in connection with the present invention.
- a web-like material is typically a material web, especially a fibre web, such as various paper webs, board webs, tissue webs, pulp webs and fabric webs, etc., for example.
- a web-like material will be referred to by the attribute "web”.
- strip means such as sealing strips and/or dewatering strips, for example
- duration of their facing parts such as a mantel and/or material
- strip means for the sake of simplicity
- facing parts of strip means such as a surface of a mantel of a suction roll and/or roll surfaces in a wire part and/or press section
- facing surface for the sake of simplicity.
- a longitudinal strip means is loaded substantially in a perpendicular direction against a facing surface so that it is in contact with the facing surface.
- the strip means includes a longitudinal strip element and a longitudinal profile element, which is a U profile open in the direction of a facing surface, for example, and which functions as a holder of the strip element so that the strip element fitted to the holder protrudes from the profile element and, at least when loaded, is in the direction of the facing surface against the facing surface, which moves substantially in a transverse direction with respect to the length of the strip element,
- an edge of the strip means or at least an edge of the strip element loaded against the facing surface is manufactured from a bending material.
- the strip element may be flexible in the direction of the radius of the roll.
- the problem is that the bending is not sufficient to provide an even contact.
- strip means or at least strip elements are manufactured in a desired total length and shaped to a desired profile shape by machining different rubber materials, resins and/or plastic-based materials, such as PE, PU, PPS, PEEK, PTFE, for example.
- the materials to be machined may be reinforced with graphite.
- the strip element of the strip means is loaded, when it is fitted to the holder, towards the facing surface, whereby the longitudinal free edge of the strip element protruding from the holder is pressed against the facing surface.
- the most common loading solutions arranged between the holder and the strip element are various mechanical loading means, such as springs, for example, and loading solutions implemented directly or indirectly by means of a pressurised medium, for example.
- the FI patent application 955275 proposes that an inside loading element is arranged in a strip element of a sealing strip of a suction roll, by means of which the strip element can be locked tight to a holder in order to better position a protruding edge of the strip element with respect to a suction roll.
- the FI patent application 974023 proposes that locking means between a strip element of a sealing strip of a suction roll and its holder, by means of which the strip element can be locked to a desired position in the holder, are fitted to a cavity on one side of the strip element and a separate second strip is fitted to a cavity on the other side of the strip element.
- a continuous abrasive effect prevents the formation of a protecting oxide film on the facing surface or damages it locally and/or conditions the facing surface, which is why the facing surface or part of the facing surface is continuously in an active state.
- the abrasive effect may significantly reduce the service life of the facing surface, such as a mantel of a roll, for example, especially the mantel of a suction roll.
- the fatigue life leading to breakage may even be reduced to one-tenth.
- One object of the present invention is to generally reduce the disadvantages and weaknesses related to prior art and to improve the duration of a suction roll of a material web machine and to provide a solution for the management of the loading and/or the abrasion between a sealing strip and a facing surface of a suction roll, in particular to reduce the abrasion between a strip means and the facing surface and, thanks to the reduced abrasion, enable the optimisation of the thickness of a mantel of the suction roll or improvement of its duration.
- one object is to provide a new and inventive strip means, such as a sealing strip and/or dewatering strip, for example, for a material web machine for improving the duration of a suction roll.
- a sealing strip and/or dewatering strip for example, for a material web machine for improving the duration of a suction roll.
- a second object is to provide a new and inventive suction roll for a material web machine for improving the duration of the suction roll.
- a third object is to provide a new and inventive arrangement for improving the duration of a suction roll.
- a fourth object is to provide a new and inventive arrangement for improving the duration of a suction roll.
- the object according to the first aspect of the present invention can be achieved by means of a strip means according to the invention for a material web machine, which strip means may be a sealing strip intended for sealing the suction roll and/or a dewatering strip intended for removing water from the surface of the roll, for example, which strip means includes a longitudinal strip element and a longitudinal profile element, which is a U profile open in the direction of a facing surface, for example, and which functions as a holder of the strip element so that the strip element fitted to the holder, which strip element is in a transverse direction with respect to its length and substantially two-layered in its loading direction, protrudes from the profile element and, at least when loaded, is against the facing surface, which moves in a substantially transverse direction with respect to the length of the strip element, for example so that a first layer of the strip element is of a first material, which is an easily adaptive material,
- the loading of the strip element in the holder towards the facing surface can be selected so that the strip element and its edge can substantially be bent and/or shaped against the facing surface and in its direction, whereby both the friction between the edge of the strip element and the facing surface coming against it and the wearing of the facing surface coming against the edge of the strip element are minimised.
- the strip element is two-layered.
- the first layer which is typically the layer inside the holder, is of a material maintaining the continuity and shapability of the strip means.
- Preferable materials include different plastic-based and/or rubber-based materials, for example.
- the second material of the strip element is most suitably a wear resistant polymer-based combination material.
- the strip element may be manufactured, for example, by extrusion and/or mould casting and/or thermal hardening in advance to a desired length and a desired profile shape. Since the length of a product produced by such a manufacturing method may be limited, a strip means of a desired length can be provided by joining and/or locking several strip elements consecutively end to end.
- the movement in the holder caused by the thermal lengthening of the strip element may be implemented for example so that the second layer of the strip element is joined to the first layer immovably, by means of gluing or mechanical attachment/locking means, for example, whereby the strip element can move in the holder so that the first layer and the second layer are essentially immovable with respect to each other.
- the second layer of the strip element can be joined to the first layer movably, by means of mechanical locking with a clearance, for example, or by means of a form fit, for example, such as a dovetail joint in the direction of the length of the strip means, for example, whereby the second layer can move alone with respect to the holder and/or the first layer.
- the strip means according to the invention that, in order to improve the adjustment and/or shaping of the strip element, the edge of the strip element remaining within the holder, opposite to the edge loaded towards the facing surface, is notched in the direction of the length of the strip element.
- - desirable characteristics of the first material of the strip element include, among others:
- the first material layer extends continuously along the whole length of the strip means; this is particularly important when the second material layer consists of a number of material parts that are consecutive and joined together end to end;
- the first material layer is flexible in the loading direction of the strip means, whereby the strip means is easily adjusted and/or shaped to the facing surface even if the second material layer would, for some reason, wear out locally; in addition, this enables an even contact to be formed between the strip means and its facing surface so that local pressure peaks or friction peaks cannot be generated;
- the object according to the second aspect of the invention may be achieved by means of an improved suction roll according to the invention for a material web machine for improving the duration of the suction roll, in which a sealing strip or a strip element of the sealing strip is against an inner surface of a perforated mantel of the suction roll, which inner surface functions as a facing surface when a loading means loads the strip element in a holder against the facing surface, for example so that, in order to reduce the effects of the abrasion of the sealing strip or the strip element of the sealing strip, the inner surface of the mantel, which functions as the facing surface of the sealing strip or the strip element of the sealing strip, has been surface treated by means of grain blasting, a thermal injection coating, a chemical or electro-chemical precipitation coating and/or a polymer-based coating, for example.
- the thermal injection coating can be applied according to the invention by means of a metal coating, a metal ceramic coating or a ceramic coating, for example, in which case the thermal injection coating is preferably a WCCo coating, a chromium oxide coating or a combination coating of the release type.
- the chemical or electro-chemical precipitation coating can be applied according to the invention as a brushing coating, for example, more preferably by means of nickel plating, chromium plating, etc.
- the polymer-based coating may be applied according to the invention by means of epoxidisation, teflonisation, etc., for example.
- the coating may include a filler, which preferably includes oxides, carbides and/or metal particles.
- grain blasting may according to the invention function as an adhesion for coatings, especially a thermal injection coating.
- the object according to the second aspect of the invention can be achieved by means of an improved suction roll according to the invention for a material web machine for improving the duration of the suction roll, in which a sealing strip or a strip element of the sealing strip is against an inner surface of a perforated mantel of the suction roll, which inner surface functions as a facing surface when a loading means loads the strip element in a holder against the facing surface, for example by means of a solution which is characterised in that an additive is fed between abrasive surfaces, or between the facing surface and the sealing strip or the strip element of the sealing strip, in order to reduce friction and abrasion and to protect the facing surface inside the roll and to reduce the effect of the abrasion of the sealing strip or the strip element of the sealing strip.
- the additive may be fed with lubricating water or through feeding channels in the sealing strip / strip element.
- a suitable polymer such as wax, a Teflon solution or an additive for water hydraulics known as such, for example, may be used as the additive.
- the object according to the second aspect of the invention can also be achieved by means of an improved suction roll according to the invention for a material web machine for improving the duration of the suction roll, in which a sealing strip or a strip element of the sealing strip is against an inner surface of a perforated mantel of the suction roll, which inner surface functions as a facing surface when a loading means loads the strip element in a holder against the facing surface, for example so that, in order to reduce the effects of the abrasion of the sealing strip or the strip element of the sealing strip, at least part of suction holes in a wall of the mantel have been broached or chamfered to be cone-shaped or rounded from the side of the facing surface inside the mantel.
- the object according to the third aspect of the invention can be achieved by an arrangement according to the invention for improving the duration of a suction roll when a sealing strip or a strip element of the sealing strip is against an inner surface of a perforated mantel of a suction roll, which inner surface functions as a facing surface when a loading means loads the strip element in a holder against the facing surface, for example so that, in order to reduce the effect of the abrasion between the strip element and the facing surface, loading pressure is adjusted or set to such a limit pressure at which a sufficient sealing effect is still maintained or harmful leakage does not occur. It is preferable that at the limit pressure the setting or adjustment of the loading pressure is as low as possible so that a sufficient sealing effect is still maintained and the harmful consequential phenomena caused by abrasion can no longer occur.
- the setting or adjustment of the loading pressure of the strip element is automatically controlled. This may be implemented for example so that the setting or adjustment of the loading pressure of the strip element follows the underpressure in a fitting space of the strip element or an underpressure chamber UPC inside the suction roll and keeps the loading of the strip element at such a limit pressure that the sealing between the strip element and the facing surface does not yet leak harmfully.
- a suitable loading means is a hose means filled with a loading medium or a loading hose, for example, the use of which can make the optimisation and/or minimisation of the loading pressure easier.
- the object according to the fourth aspect of the invention can be achieved by a method according to the invention for improving the duration of a suction roll of a material web machine when a sealing strip or its strip element is loaded in a holder of the strip element against an inner surface of a perforated mantel of the rotating suction roll, which inner surface functions as a facing surface of the strip element, for example so that, in order to reduce the effect of the abrasion between the strip element and the facing surface, loading pressure is adjusted or set to such a limit pressure at which a sufficient sealing effect is still maintained or harmful leakage does not occur. In such a case it is preferable that the loading pressure between the strip element and the facing surface is kept substantially even in a contact area of the strip element and the facing surface. In order to keep the loading pressure constant essentially along the whole length of the strip element it is preferable that a strip element shaping according to the facing surface is used.
- the improved arrangement according to the invention in the suction roll in order to control the load and/or the abrasion between the sealing strip and the suction roll allows avoiding premature damages, obtaining more service life at low costs, using lower safety coefficients and/or using cheaper materials.
- damages to the surface of the mantel of the roll which may be susceptible to the effects of the sealing strip or dewatering strip (thermal fatigue and activation of the surface), may be reduced and wear resistance may be improved.
- FIG 1 shows a first embodiment of the present invention
- FIG 2 shows a second embodiment of the present invention
- FIG 3a shows one embodiment of a strip element according to the invention
- FIG 3 b shows a second embodiment of a strip element according to the invention
- FIG 3c shows a third embodiment of a strip element according to the present invention.
- At least one pair of sealing strips 1 are arranged inside the suction roll substantially in the direction of the axle of the suction roll and in the rotation direction of the suction roll at an interval from each other, which sealing strips 1 form between them a suction zone of the suction roll. If, for some reason, the contact of the sealing strip with a mantel 4 of the suction roll, or a facing surface 41 , is weakened locally or due to wearing, the opportunities to maintain underpressure in the suction zone are also correspondingly weakened. The weakening suction effect is attempted to be compensated by increasing suction power. However, this does not always succeed but premature maintenance must be resorted to or the paper web must be processed in a humidity state for which the part or parts of the paper machine after the suction roll have not been designed.
- FIG 1 shows a cross-sectional profile of a strip element 3 fitted to a holder 2 of a sealing strip 1 according to a first embodiment of the invention
- a loading means 5 loads the strip element in the holder so that the strip element is pressed against the facing surface
- FIG 2 which shows a cross-sectional profile of a strip element 3 of a sealing strip 1 according to a second embodiment fitted to a holder 2 when the sealing strip is against a surface of a mantel 4 of a suction roll, which surface functions as a facing surface 41 of the sealing strip when a loading means 5 loads the strip element in the holder so that the strip element is pressed against the facing surface.
- the sealing strip 1 is fitted to a profile element 2.
- the profile element is preferably a longitudinal U profile open in the direction of the facing surface 41.
- the U profile functions as a holder of the strip element 3 so that the strip element fitted to the holder, which strip element is two-layered in a transverse direction with respect to its length, protrudes from the U profile and, when loaded by the loading means 5, is against the facing surface, which moves when the suction roll rotates in a transverse direction with respect to the length of the strip element.
- the loading means 5 may be, as illustrated in FIG 1 and FIG 2, a hose means to be filled with a pressure medium, for example, and thereby expanding, which hose means, when expanded, is shaped in the form of a round hose by its cross-sectional profile, whereby the loading means pushes the strip element 3 outwards from the holder against the facing surface 41.
- a first layer 31 of the strip element 3 is of a first material which is an easily shaping and/or adjusting material, which can be selected fairly freely for its purpose. It is preferable to manufacture the first layer, which is typically the layer inside the holder 2, from a material that enables bending and/or shaping of the strip means against the facing surface. Some suitable materials include plastics and rubbers and fibre-reinforced composites, for example.
- a second layer 32 of the strip element or at least its free edge 33 which, at least when the strip element is loaded, is against the facing surface 41, is of a second material.
- the material of the second layer is most suitably a wear resistant and harder or at least stiffer material than the material of the first layer.
- suitable materials for the second layer 32 of the strip element 3 or at least for the free edge 33 of the strip element can be selected a carbon fibre material or a corresponding wear resistant and stiff composite material.
- the strip element can be manufactured from such a material in advance in a desired length and/or a desired profile shape by mould casting, continuous casting, extrusion, pultrusion and/or thermal hardening.
- a strip element manufactured from traditional materials may be manufactured by first cutting an element blank of a desired length from a strip element blank and after that machining the cut element blank into a desired profile shape.
- first an element blank of a desired length would be produced by cutting, which would then be post-machined into a desired profile.
- Such manufacture of a strip element is typical especially when the strip elements are of carbon fibre or a corresponding composite material, whose post-machining is particularly problematic due to the hardness and wear resistance of the material.
- the fitting space 21 in the holder 2 is dimensioned to be longer than the aggregate length of the strip elements joined together or to be joined together, which allows unproblematic thermal lengthening of the strip elements in the holder.
- the second layer 32 of the strip element is immovably joined to the first layer 31 , for example by means of gluing or a tightening joint, such as a screw joint.
- a tightening joint such as a screw joint.
- the second layer 32 of each strip element is joined movably to the first layer 31 by means of a mechanical joint, coupling and/or locking with a clearance, for example.
- a mechanical joint, coupling and/or locking with a clearance for example.
- the second layer of the strip element can move alone in the fitting space with respect to the holder and/or the first layer.
- One suitable joint for the purpose is a joint with facing surfaces corresponding to each other between the layers in the direction of the length of the strip element 3.
- FIG 2 illustrates a dovetail joint with a clearance.
- FIG 3a and FIG 3b which diagrammatically show a cross-section of embodiments of a strip element 3 or a dewatering strip in the CD direction
- FIG 3c which diagrammatically shows a cross-section of a third embodiment of a strip element 3 or a dewatering strip in the MD direction.
- a second layer 32 of a strip element has been immovably joined to a first layer 31 by gluing 35, for example, whereby the strip element can move in a holder so that the first layer and the second layer are essentially immovable with respect to each other.
- the second layer 32 of the strip element may be joined to the first layer 31 movably, by means of mechanical locking with a clearance, for example.
- FIG 3c shows as an example a form fit locking with a clearance and thus a dovetail joint 36 in the direction of the length of a strip element runs in the direction of the length of the strip element 3.
- a second layer 32 of the strip element 3 can move alone in a holder 2 with respect to a first layer 31.
- the joint functions like a fixed joint (cf. FIG 3a, for example), whereby the strip element can move in the holder so that the first layer and the second layer are essentially immovable with respect to each other.
- notches 34 which are essentially in the MD direction and which are separated from each other by unnotched projections 37 have been arranged in the edge inside the holder 2, opposite to the free edge 33 of the strip element 3 loaded towards the facing surface 41 in the direction of the length of the strip element, or the CD direction, at an interval from each other.
- Such notches may reduce the rigidity of the strip element and thus the notches may promote the adjustment and/or shaping of the strip element, which is loaded towards the facing surface 41, to the facing surface 41.
- the mutual relationships between the notches and the projections and the depth and interval of the notches may vary and they are selected according to the desired flexibility.
- the notches 34 may be filled with a flexible filler material 33, foam plastic, for example, or the notches may be left free of a filler material. Both solutions meet the requirement of an adjusting and/or shaping strip element.
- An additive can be channelled between the notches 34 and through the facing surface 41 of the suction roll and the sealing strip / strip element 3, or between the surfaces abrading against each other, in order to reduce friction and abrasion and to protect the facing surface inside the roll and to reduce the effect of the abrasion of the sealing strip or the strip element of the sealing strip.
- the sealing strip or the strip element of the sealing strip may have a feeding channel or a feeding aggregate 6, which extends in the notched sealing strip / strip element 3 from the notch 34 or projection 37 between the facing surface 41 and the sealing strip / strip element 3.
- suitable additives include suitable polymers, such as wax, a Teflon solution and various additives used in water hydraulics, for example.
- the strip element may be notched in the direction of its width (not shown in the figures).
- the loading means may load the unnotched parts of the strip element in the holder 2, which delimit the notch and/or notches. Therefore a structure of the strip element 3 has been provided which allows providing a strip element that adjusts corresponding to a facing surface that change in time and/or place. Thereby use of lower loading forces or loading pressures is enabled without dangers of air leakage. It can also be stated about such an adjusting strip element that
- part of the strip element 3 may be manufactured from a material whose modulus of elasticity is lower or the whole strip element is of a material with a lower modulus of elasticity,
- the one-sided lateral force caused by the frictional force of the facing surface 41 may decline the strip element 3 and thus cause an increase in friction.
- Friction may be reduced by a Teflon layer 8, for example, (cf. FIG 2) at the edges of the holder 2 or by pivoting (not shown in the figures) the strip element 3 at its input or output side to a pivot line, which is correspondingly at the input or output side of the strip.
- An adjusting strip element can be prepared for example by notching the strip from the underside at fixed intervals, by using wholly or partly a material with a lower modulus of elasticity, or by minimising the height of the strip. Since from the point of view of heat generation it is apparent that different sealing strip materials generate heat in different ways such a sealing material should be used whose heat generation is low and whose surface activating effect is slight.
- the loading pressure on the strip element 3 of the sealing strip is set or adjusted to be as low as possible so that a sufficient sealing effect on the strips is still maintained.
- the adjustment can be made automatically controlled. This can be implemented for example so that the underpressure in the underpressure chamber UPC is followed and the loading of the strip element is kept at such a limit pressure that the sealing between the strip element and the facing surface 41 does not yet leak harmfully.
- the use of formed loading hoses 5 conferring a constant load makes the minimising of the loading pressure easier according to the invention.
- abrasion may significantly reduce the service life of the mantel 4 of the suction roll.
- This attempt may be achieved by the suction roll according to the invention so that optionally the elimination of the effects of abrasion or at least their significant reduction is implemented by surface treatments of the facing surface 41, good feeding of a lubricant between the strip element 3 and the facing surface, or the feeding of a protective additive on the facing surface of the strip element.
- the surface treatment of the facing surface may be implemented by means of grain blasting, a thermal injection coating, a chemical or electro-chemical precipitation coating and/or a polymer-based coating. It is emphasised that the above-mentioned surface treatments are only examples and that other treatments and/or coatings protecting the surface known as such fall within the scope of the invention and they may be applied in order to achieve the desired purpose.
- the grain blasting of the inner surface of the mantel 4 of the suction roll or the facing surface 41 of the strip element 3 of the sealing strip is performed according to the invention preferably by using ceramic-based sand, glass balls or a material containing a corresponding hard grain-like substance, for example, in order to cause compression stresses on the inner surface of the mantel 4, which impedes or prevents the start of fatigue cracks.
- the grain blasted facing surface is ground lightly to grind off any peaks on the surface.
- the thermal injection coating of the inner surface of the mantel 4 of the suction roll or the facing surface 41 of the strip element 3 of the sealing strip is applied according to the invention preferably by means of a metal coating, a metal ceramic coating or a ceramic coating.
- the thermal injection coating thus provided is preferably a WCCo coating, a chromium oxide coating or a combination coating of the release type.
- the prepared surface of such a thermal injection coating may be provided by the grain blasting explained above.
- the chemical or electro-chemical precipitation coating of the inner surface of the mantel 4 of the suction roll or the facing surface 41 of the strip element 3 of the sealing strip is applied according to the invention preferably as a brushing coating, more preferably by means of nickel plating, chromium plating, etc.
- the polymer-based coating of the inner surface of the mantel 4 of the suction roll or the facing surface 41 of the strip element 3 of the sealing strip is applied according to the invention preferably by means of epoxidisation, teflonisation, etc.
- the wear resistance of the coating of the inner surface of the mantel 4 of the suction roll or the facing surface 41 of the strip element 3 of the sealing strip may be improved according to the invention by using a filler along with the coating.
- a filler include different oxides, carbides and/or metal particles, for example.
- the additive or lubricant reduces the friction and the abrasive loading between the strip element and its facing surface and protects the facing surface of the strip element inside the roll, which significantly reduces the abrasive effect of the strip element on the inner surface of the mantel of the suction roll.
- the additive or lubricant may be fed together with lubricating water, whereby the lubricant or additive enters together with the mantel 4 of the rotating suction roll between the strip element 3 and its facing surface 41, or through the feeding channels 6 in the strip element, whereby the lubricant or additive enters directly through the feeding channel between the strip element 3 and the facing surface 41.
- Suitable lubricants or additives according to the invention include polymers, such as waxes, Teflon solutions or different additives for water hydraulics known as such, for example.
- abrasion may significantly reduce the service life of the mantel 4 of the suction roll.
- This attempt may be achieved by the suction roll according to the invention so that, in order to reduce the effects of the abrasion of the strip element 3 of the sealing strip, at least part of suction holes 7 in a wall of the mantel 4 have been broached or chamfered to be cone-shaped or rounded on the side of the facing surface inside the mantel.
- Such broaching of the suction holes 7 in the mantel of the suction roll, which rotates round its geometrical longitudinal axle, may alone or together with the surface treatment of the facing surface of the strip element of the sealing strip inside the mantel 4 of the suction roll and/or together with the feeding of a lubricant or an additive may decisively reduce the abrasive loading of the sealing strip on the mantel of the suction roll, which is apt to significantly increase the service life of the suction roll.
- abrasion may significantly reduce the service life of the mantel 4 of the suction roll.
- This attempt may be achieved by an arrangement according to the invention so that, in order to reduce the effect of the abrasion between the strip element and the facing surface, loading pressure is adjusted or set to such a limit pressure at which a sufficient sealing effect is still maintained or harmful leakage does not occur.
- the setting or adjustment of the loading pressure is as low as possible so that a sufficient sealing effect is still maintained and the harmful consequential phenomena caused by abrasion can no longer occur.
- the loading pressure between the strip element 3 of the sealing strip and its facing surface 41 is essentially even throughout a contact area of the strip element and the facing surface.
- the strip element is essentially shaping corresponding to the shape of the facing surface. The shaping of the strip element to the facing surface may be ensured by a strip element, for example, which has notches 34 at an interval from each other in the long free edge 33 opposite to the sealing edge. According to the invention the setting or adjustment of the loading pressure of the strip element 3 is automatically controlled.
- a preferable loading means 5 for loading the strip element is a hose means to be filled with a loading medium or a loading hose, the use of which may also make the optimisation and/or minimisation of the loading pressure easier.
- abrasion may significantly reduce the service life of the mantel 4 of the suction roll.
- This problem may be solved by a method according to the invention for improving the duration of the mantel of the suction roll of the material web machine when the sealing strip or its strip element 3 is loaded in the holder 2 of the strip element against the inner surface of the perforated mantel 4 of the rotating suction roll, which inner surface functions as the facing surface 41 of the strip element, so that, in order to reduce the effect of the abrasion between the strip element and the facing surface, loading pressure is adjusted or set to such a limit pressure at which a sufficient sealing effect is still maintained or harmful leakage does not occur.
- the loading pressure between the strip element 3 and the facing surface 41 is kept substantially even in the contact area of the strip element and the facing surface.
- a strip element ensured to shape according to the facing surface 41 is used.
- a shaping strip element can be formed by a strip element equipped with notches 34 at its free edge 33, for example.
- strip means according to the invention may be used not only for sealing purposes in the suction roll but for different dewatering purposes of the surface of the roll and also for purposes of cleaning the surface of the roll.
Landscapes
- Paper (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0923406A AT504469A3 (en) | 2005-07-01 | 2006-06-27 | STRIP DEVICE AND IMPROVED SUCTION ROLLER FOR A MATERIAL TRACK MACHINE AND CONSTRUCTION AND METHOD FOR IMPROVING THE DURABILITY OF THE SUCTION ROLL |
DE112006001422T DE112006001422T5 (en) | 2005-07-01 | 2006-06-27 | Strip device and improved suction roll for a web machine and structure and method for improving the durability of the suction roll |
US11/994,386 US20090000753A1 (en) | 2005-07-01 | 2006-06-27 | Strip Means and an Improved Suction Roll for a Material Web Machine and an Arrangement and a Method for Improving the Duration of the Suction Roll |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20055371 | 2005-07-01 | ||
FI20055371A FI20055371A0 (en) | 2005-07-01 | 2005-07-01 | A molding tool for a material web machine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007003698A1 true WO2007003698A1 (en) | 2007-01-11 |
Family
ID=34803240
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI2006/050285 WO2007003698A1 (en) | 2005-07-01 | 2006-06-27 | A strip means and an improved suction roll for a material web machine and an arrangement and a method for improving the duration of the suction roll |
Country Status (5)
Country | Link |
---|---|
US (1) | US20090000753A1 (en) |
AT (1) | AT504469A3 (en) |
DE (1) | DE112006001422T5 (en) |
FI (1) | FI20055371A0 (en) |
WO (1) | WO2007003698A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2108736A2 (en) * | 2008-04-08 | 2009-10-14 | Voith Patent GmbH | Method for manufacturing machine components and roll shell manufactured accordingly |
DE102011004055A1 (en) | 2011-02-14 | 2012-08-16 | Voith Patent Gmbh | seal means |
WO2014026920A1 (en) * | 2012-08-15 | 2014-02-20 | Voith Patent Gmbh | Sealing strip |
WO2014026914A1 (en) * | 2012-08-15 | 2014-02-20 | Voith Patent Gmbh | Sealing device, suction roll and method for producing and/or processing a paper, cardboard or tissue web |
WO2015007414A1 (en) * | 2013-07-19 | 2015-01-22 | Voith Patent Gmbh | Sealing strip for a paper, paperboard or tissue machine, consisting of multiple materials |
US20150184340A1 (en) * | 2012-05-25 | 2015-07-02 | Voith Patent Gmbh | Sealing strip system |
US10179973B2 (en) * | 2014-09-15 | 2019-01-15 | Rochling Leripa Papertech Gmbh & Co. Kg | Sealing-strip holder |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BR112018007748B1 (en) | 2015-11-03 | 2022-07-26 | Kimberly-Clark Worldwide, Inc. | PAPER FABRIC PRODUCT, CLEANING PRODUCT, AND, PERSONAL CARE ABSORBING ARTICLE |
BR112020007694B1 (en) | 2017-11-29 | 2022-12-13 | Kimberly-Clark Worldwide, Inc | METHOD FOR PRODUCING A MULTILAYER SUBSTRATE FORMED BY FOAM |
CN112469857B (en) | 2018-07-25 | 2022-06-17 | 金伯利-克拉克环球有限公司 | Method for producing three-dimensional foam-laid nonwovens |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI99035B (en) * | 1995-11-03 | 1997-06-13 | Valmet Corp | Paper machine suction roll sealing structure |
CA2299814A1 (en) * | 1999-03-01 | 2000-09-01 | Thomas Edward Frawley Jr. | Suction roll sealing strip |
US6312564B1 (en) * | 1998-09-18 | 2001-11-06 | Voith Sulzer Papiertechnik Patent Gmbh | Sealing device and process for sealing pressure zones in a paper-making machine |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US712664A (en) * | 1901-08-14 | 1902-11-04 | George H Crocker | Suction-box for paper-making machines. |
US4076582A (en) * | 1977-04-04 | 1978-02-28 | Diamond International Corporation | Suction roll sealing strip cleaning structure |
US4714523A (en) * | 1986-12-18 | 1987-12-22 | Sawyer Jr William D | Suction roll seal strips with teflon insert |
FI107171B (en) * | 1997-10-22 | 2001-06-15 | Metso Paper Inc | Paper machine / board machine suction roll suction box sealing structure |
US6423185B1 (en) * | 1998-03-03 | 2002-07-23 | Metso Paper, Inc. | Process of surface treatment for faces that become contaminated in a paper or board machine |
DE19842838A1 (en) * | 1998-09-18 | 2000-03-23 | Voith Sulzer Papiertech Patent | Sealing device and method for sealing pressure zones in a paper machine |
-
2005
- 2005-07-01 FI FI20055371A patent/FI20055371A0/en not_active Application Discontinuation
-
2006
- 2006-06-27 DE DE112006001422T patent/DE112006001422T5/en not_active Withdrawn
- 2006-06-27 US US11/994,386 patent/US20090000753A1/en not_active Abandoned
- 2006-06-27 AT AT0923406A patent/AT504469A3/en not_active Application Discontinuation
- 2006-06-27 WO PCT/FI2006/050285 patent/WO2007003698A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI99035B (en) * | 1995-11-03 | 1997-06-13 | Valmet Corp | Paper machine suction roll sealing structure |
US6312564B1 (en) * | 1998-09-18 | 2001-11-06 | Voith Sulzer Papiertechnik Patent Gmbh | Sealing device and process for sealing pressure zones in a paper-making machine |
CA2299814A1 (en) * | 1999-03-01 | 2000-09-01 | Thomas Edward Frawley Jr. | Suction roll sealing strip |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2108736A2 (en) * | 2008-04-08 | 2009-10-14 | Voith Patent GmbH | Method for manufacturing machine components and roll shell manufactured accordingly |
EP2108736A3 (en) * | 2008-04-08 | 2012-12-26 | Voith Patent GmbH | Method for manufacturing machine components and roll shell manufactured accordingly |
DE102011004055A1 (en) | 2011-02-14 | 2012-08-16 | Voith Patent Gmbh | seal means |
WO2012110320A1 (en) * | 2011-02-14 | 2012-08-23 | Voith Patent Gmbh | Sealing device |
CN103380248A (en) * | 2011-02-14 | 2013-10-30 | 福伊特专利公司 | Sealing device |
US9752683B2 (en) | 2011-02-14 | 2017-09-05 | Voith Patent Gmbh | Sealing device |
US9447542B2 (en) * | 2012-05-25 | 2016-09-20 | Voith Patent Gmbh | Sealing strip system |
US20150184340A1 (en) * | 2012-05-25 | 2015-07-02 | Voith Patent Gmbh | Sealing strip system |
CN104583487A (en) * | 2012-08-15 | 2015-04-29 | 福伊特专利有限公司 | Sealing strip |
CN104583489A (en) * | 2012-08-15 | 2015-04-29 | 福伊特专利有限公司 | Sealing device, suction roll and method for producing and/or processing paper, cardboard or tissue web |
WO2014026914A1 (en) * | 2012-08-15 | 2014-02-20 | Voith Patent Gmbh | Sealing device, suction roll and method for producing and/or processing a paper, cardboard or tissue web |
US9650743B2 (en) | 2012-08-15 | 2017-05-16 | Voith Patent Gmbh | Sealing device, suction roll and method for producing and/or processing a paper, cardboard or tissue web |
WO2014026920A1 (en) * | 2012-08-15 | 2014-02-20 | Voith Patent Gmbh | Sealing strip |
US10113647B2 (en) | 2012-08-15 | 2018-10-30 | Voith Patent Gmbh | Sealing strip for a sealing device in a machine for processing a paper, cardboard, or tissue web |
WO2015007414A1 (en) * | 2013-07-19 | 2015-01-22 | Voith Patent Gmbh | Sealing strip for a paper, paperboard or tissue machine, consisting of multiple materials |
CN105392941A (en) * | 2013-07-19 | 2016-03-09 | 福伊特专利有限公司 | Sealing strip for a paper, paperboard or tissue machine, consisting of multiple materials |
US9708768B2 (en) | 2013-07-19 | 2017-07-18 | Voith Patent Gmbh | Sealing strip for a paper, cardboard or tissue machine made from a plurality of materials |
US10179973B2 (en) * | 2014-09-15 | 2019-01-15 | Rochling Leripa Papertech Gmbh & Co. Kg | Sealing-strip holder |
US10184214B2 (en) * | 2014-09-15 | 2019-01-22 | Rochling Leripa Papertech Gmbh & Co. Kg | Sealing strip systems for suction rolls |
Also Published As
Publication number | Publication date |
---|---|
AT504469A2 (en) | 2008-05-15 |
DE112006001422T5 (en) | 2008-05-08 |
FI20055371A0 (en) | 2005-07-01 |
US20090000753A1 (en) | 2009-01-01 |
AT504469A3 (en) | 2010-04-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2007003698A1 (en) | A strip means and an improved suction roll for a material web machine and an arrangement and a method for improving the duration of the suction roll | |
EP1434725B1 (en) | Scraper blade,especially conveyor belt scraper | |
JP4801162B2 (en) | Scraper blade and manufacturing method of scraper blade | |
US4714523A (en) | Suction roll seal strips with teflon insert | |
AU2002341475A1 (en) | Scraper blade, especially conveyor belt scraper | |
CA3101384C (en) | Roller mill with a scraper | |
US20080011562A1 (en) | Multiple layer friction material brake pad | |
US7033459B2 (en) | Arrangement for doctoring a belt or a soft roll surfacing in a paper or board machine | |
JP2000509114A (en) | Creping blade | |
AU2002244973B2 (en) | Belt for shoe press | |
JP2000240745A (en) | Transmission unit for automobile, pulley used thereby, and manufacture of such pulley | |
US6042695A (en) | Shoe press belt with lateral variations in hardness | |
JP2906234B2 (en) | Press equipment for paper making machines | |
WO2003104555A1 (en) | Serrated doctor blades | |
US20160325395A1 (en) | Deburring Machine for Deburring Metal Work Pieces | |
JP2000516171A (en) | Doctor blade for scraping excess printing ink from the plate surface | |
JP3180285B2 (en) | Oil seal | |
EP1378601A1 (en) | Shoe press belt | |
JP4600633B2 (en) | Oil seal | |
CN1976762A (en) | Doctor blade holder | |
JP2005002546A (en) | Seal strip for suction roll and method for manufacturing the same | |
US6740203B2 (en) | Papermaker's nip thickener fabric | |
WO2004009903A1 (en) | Paper machine roll cover | |
FI120514B (en) | Suction roll gasket and method of manufacture | |
Merrion | Un-Nipped Roll Cover Technology: Finding Performance Benefits and Cost Savings in Modern Chemistry |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1120060014226 Country of ref document: DE |
|
ENP | Entry into the national phase |
Ref document number: 92342006 Country of ref document: AT Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 11994386 Country of ref document: US |
|
RET | De translation (de og part 6b) |
Ref document number: 112006001422 Country of ref document: DE Date of ref document: 20080508 Kind code of ref document: P |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 06764524 Country of ref document: EP Kind code of ref document: A1 |