EP2408964B1 - Steam-heated drying cylinder with internal bars for increasing the heat capacity - Google Patents
Steam-heated drying cylinder with internal bars for increasing the heat capacity Download PDFInfo
- Publication number
- EP2408964B1 EP2408964B1 EP10705871A EP10705871A EP2408964B1 EP 2408964 B1 EP2408964 B1 EP 2408964B1 EP 10705871 A EP10705871 A EP 10705871A EP 10705871 A EP10705871 A EP 10705871A EP 2408964 B1 EP2408964 B1 EP 2408964B1
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- EP
- European Patent Office
- Prior art keywords
- drying cylinder
- retaining ring
- cylinder according
- spoiler bars
- circumferential surface
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
- D21F5/021—Construction of the cylinders
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
- D21F5/022—Heating the cylinders
- D21F5/028—Heating the cylinders using steam
Definitions
- the invention relates to a steam-heated drying cylinder for drying a material web, in particular a paper, board or tissue web.
- the drying cylinder comprises an inner space with a lateral surface and a device for increasing the heat transfer from the inner space to the outer surface, wherein the device consists of a plurality of circumferentially arranged, axially aligned and the lateral surface touching Störangn and at least one circumferentially extending retaining ring with at least one clamping element, wherein the at least one retaining ring with the at least one clamping element cooperates such that a radial, acting on the spoiler bars clamping force of the at least one retaining ring is formed and wherein the spoiler bars are formed as a U-profile, the open side facing the lateral surface.
- the spoiler bars are formed by tubes of rectangular cross-section and pressed by retaining rings to the cylinder inner wall. For attachment of the spoiler bars with the retaining rings are in the spoiler bars for receiving pins, which in turn are bolted to the retaining rings or connected by fits.
- the spoiler bars are connected directly to the cylinder jacket.
- the object of the invention is to provide a cost-effective, variable solution for connecting spoiler bars and retaining rings, which also allows easy assembly and disassembly without special tools and a modular design of the device and on the other ensures a secure fit of the inguinal cage in the drying cylinder.
- the object is achieved for a generic drying cylinder, characterized in that the at least one retaining ring is positively connected at least with a portion of the spoiler.
- the solution according to the invention enables a quick and tool-free installation of the retaining rings with the spoiler bars.
- This simple construction of the device consists of a few different components, so that standardization is possible and simplified from an economic point of view. This also results in a cost reduction of this device over the known devices.
- the spoiler bars have fixing openings and the at least one retaining ring has fixing lugs. These together form the positive connection.
- the cross section of the fixing openings may be round or preferably rectangular or square.
- the fixing tabs are preferably made with the corresponding complementary shape.
- the fixing lugs may be separate components, which are mounted on the respective retaining ring or produced during the production of the respective retaining ring from a piece of material.
- the positive connection is designed so that there is a degree of freedom in the radial direction.
- the fault strip can move relative to the retaining ring in the radial direction to compensate, for example, small differences in geometry of the components. In the axial direction and in the circumferential direction, however, essentially no relative movements are possible.
- the fixing holes of the spoiler bars and the fixing tabs of the retaining rings are arranged in pairs.
- the fixing holes in the retaining rings and the fixing tabs are in the spoiler bars.
- the number of fixing holes or the fixing tabs in the spoiler bars is at least equal to the number of retaining rings, but preferably it is larger.
- the distance of the retaining rings in the axial direction can be flexibly and variably adjusted without having to make changes to the spoiler bars.
- the distance in the edge regions of the drying cylinder may be smaller than in the middle region.
- the spoiler strips consist of U-shaped strips and the open side of a U-shaped strip is directed to the lateral surface of the drying cylinder.
- the contact surfaces of the legs of the Störjon extend over the entire length of the respective Störelf.
- the leg width of the spoiler bars in the range of 0.8 mm and 6 mm, in particular in the range of 1.5 mm and 3 mm. If the U-profile is made from a metal sheet, then the leg width corresponds to the sheet thickness. In a practical embodiment, the sheet thickness is for example 2mm.
- the height of a faulty strip is in the range of 3 mm to 30 mm, preferably between 5 mm and 12 mm. In a practical example, it is 8 mm.
- the width of a noise strip is in the range of 8 mm to 50 mm, preferably between 12 mm and 30 mm. In a practical example, it is 20 mm.
- the contact surfaces of the legs of the fault strips are only partially on the lateral surface. In this case, the contact surfaces have recesses.
- edges of the contact surface of the legs contacting the lateral surface are designed sharp-edged.
- sharp-edged is an edge deburred after mechanical machining understand. The radius is less than 0.5 mm.
- the strip cage is frictionally held on the lateral surface of the drying cylinder.
- the retaining rings consist of U-shaped strips.
- the retaining rings consist of one or more retaining ring segments.
- the number of retaining ring segments corresponds to a prime number.
- no or only small imbalances are particularly advantageous.
- retaining rings which consist of three retaining ring segments. Such systems have the property of self-centering.
- the retaining rings are advantageously designed rotationally symmetrical.
- the clamping element can be designed as a cylindrical spring or coil spring and generates in the installed state, the radial clamping force on the Störance and thus the contact pressure of the Störance on the outer surface of the drying cylinder.
- connecting elements for connecting the clamping elements to the retaining ring segments are arranged on both sides of the clamping elements.
- the connecting elements are designed so that the distance between the connecting elements and thus the length of the clamping element is variable. If, for example, a cylindrical spring is used as the clamping element, the connecting elements can each be designed with two lugs for receiving clamping screws. By means of the connecting elements connecting the clamping screws now the distance of the connecting elements can be shortened and thus the cylinder spring can be compressed. In this tensioned state, the diameter of the retaining rings smaller, so that the retaining rings or the spoiler bars and retaining rings with clamping elements comprehensive cage cage can be easily installed in the drying cylinder. When installed, the clamping screws are relieved and thus brought the inguinal cage in operating position.
- the arrangement of the clamping elements and connecting elements is chosen so that the line of action of the force acting on the retaining ring segments expansion force substantially coincides with the axis of the clamping element. As a result, bending moments are avoided on the retaining ring segments due to the expansion force.
- a drying cylinder can be equipped in a preferred embodiment with multiple inguinal cage modules.
- a strip cage module is characterized in that the length of the spoiler strips is shorter than the lateral surface of the interior of a length L in the axial direction having drying cylinder.
- several similar inguinal cage modules can be installed one behind the other in the axial direction. Modular design simplifies manufacturing and reduces manufacturing costs.
- the embodiment variant comes into play, in which the number of fixing holes or fixing straps in the spoiler bars is greater than the number of retaining rings.
- the distance of the retaining rings in the edge regions can be made narrower than in the middle.
- the lengths of the individual spoiler bars and thus of a last cage module are 2 meters.
- the distance of the retaining rings is 500 mm, in the border areas 250 mm.
- Cleats and retaining rings can be made of the same or different materials. Appropriate materials are metallic materials, such as steel, stainless steel, brass or non-metallic materials such as plastics, fiber-reinforced materials, etc ..
- FIG. 1 1 shows a steam-heated drying cylinder 1 according to the invention of a paper machine with a strip cage 10 installed in its interior.
- the spoiling strips 2 are arranged axially, that is to say parallel to the longitudinal axis of the drying cylinder 1, and pressed against the jacket surface 1.1 with four retaining rings 3.
- the retaining rings 3 are composed of retaining ring segments 3.1. To generate the radial clamping force on the spoiler bars 2, the retaining ring segments are pressed apart by coil springs or cylinder springs 4. In this example, there is a positive connection at each intersection between the retaining ring segment 3.1 and 2 Störmann.
- the retaining rings 3 are arranged equidistantly.
- the illustrated inguinal cage 10 may also form a last cage module for wider paper machines.
- the inguinal cage of wide drying cylinders is then formed by several side-by-side inguinal cage modules 10. These strip cage modules 10 are then preferably the same width. Thus, the same modules can be combined into a last cage. In the event that the length of the interior of the cylinder does not correspond to the integral multiple of the width of a last cage module, the missing length is fitted with a cage with a suitable width.
- a strip cage 10 is shown schematically in cross section perpendicular to the longitudinal axis of the drying cylinder 1.
- the retaining ring 3 consists of 3 retaining ring segments 3.1, 3.2, 3.3 are connected via trained as a spiral springs 4 clamping elements in operative connection.
- the connecting elements 8, 9 between retaining ring segment 3.1, 3.2, 3.3 and clamping element 4 are not shown for clarity.
- the spoiler bars 2 are arranged on the outer circumference of the retaining ring 3 and formed as U-profiles.
- FIG. 3 shows a part of a Störlich 2, which is designed as a U-shaped profile.
- the leg width 5 is 2 mm
- the Störancen Love 5.2 is 8 mm
- the Störancenbreite 5.1 is 20 mm.
- the Störarchnschreiben 5.4 has paired fixing holes 7. In this example, two pairs of such fixing holes 7 are shown.
- FIG. 4 is a section of a retaining ring segment 3.1 shown with three fixing tabs 6.
- the fixing lugs 6 are made together with the fault strip of a material. For example, they were made of a stainless steel sheet having a thickness of 2 mm. The distances of the fixing tabs 6 have different values. However, they are preferably the same.
- FIG. 5 shows the retaining ring segment 3.1 in the side view along the section line XX in the FIG. 4 , It can be seen that the retaining ring segments consist of a U-profile.
- Each leg has paired fixing lugs 6, which together with the pairs of fixing holes 7 of the spoiler bars 2 form the respective form-fitting.
- FIG. 6 shows the clamping element 4 in the form of a cylindrical spring 4, which is arranged between the connecting elements 8 and 9.
- the connecting elements 8, 9 each have a clamping element receptacle 8.4 for receiving the cylindrical spring 4 and two support lugs 8.1, 9.1 and a centering tab 8.2, 9.2 as a plug connection with the respective retaining ring segments 3.1 and 3.2.
- the connecting elements 8, 9 have transverse clamping straps 8.4, 9.4 for receiving clamping screws 11.
- the cylinder spring 4 is tensioned and the diameter of the retaining rings 3 are reduced.
- the clamping screws 11 are positioned in slots of the clamping tabs 8.4, 9.4. As a safeguard against lateral slipping out of the clamping screws 11 ramps 8.5, 9.5 are provided.
- FIG. 7 is a side view of the FIG. 6 shown in section.
- the clamping element 8.3 is designed as a round hollow body
- the centering 8.2 engage in the U-profile of the retaining rings 3.1, 3.2 and center them with the clamping element 4 in the axial direction of the drying cylinder 1.
- the back of the U-profile of the retaining ring segments 3.1, 3.2 is in clamped by the centering tab 8.2, 9.2 and the support lugs 8.1, 9.1 formed gap.
- the support lugs 8.1, 9.1 are shaped so that the gap tapers in the direction of insertion of the retaining ring segment 3.1, 3.2.
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- Drying Of Solid Materials (AREA)
Description
Die Erfindung betrifft einen mit Dampf beheizbaren Trockenzylinder zum Trocknen einer Materialbahn, insbesondere einer Papier-, Karton- oder Tissuebahn. Der Trockenzylinder umfasst einen Innenraum mit einer Mantelfläche und eine Vorrichtung zur Erhöhung der Wärmeübertragung vom Innenraum auf die Mantelfläche, wobei die Vorrichtung aus mehreren in Umfangsrichtung angeordneten, axial ausgerichteten und die Mantelfläche berührenden Störleisten und mindestens einem in Umfangsrichtung verlaufenden Haltering mit mindestens einem Spannelement besteht, wobei der mindestens eine Haltering mit dem mindestens einen Spannelement derart zusammenwirkt, dass eine radiale, auf die Störleisten wirkende Spannkraft des mindestens einen Halteringes entsteht und wobei die Störleisten als U-Profil ausgebildet sind, dessen offene Seite zur Mantelfläche weist.The invention relates to a steam-heated drying cylinder for drying a material web, in particular a paper, board or tissue web. The drying cylinder comprises an inner space with a lateral surface and a device for increasing the heat transfer from the inner space to the outer surface, wherein the device consists of a plurality of circumferentially arranged, axially aligned and the lateral surface touching Störleisten and at least one circumferentially extending retaining ring with at least one clamping element, wherein the at least one retaining ring with the at least one clamping element cooperates such that a radial, acting on the spoiler bars clamping force of the at least one retaining ring is formed and wherein the spoiler bars are formed as a U-profile, the open side facing the lateral surface.
Trockenzylinder mit diesen Vorrichtungen sind bekannt. So wird im Dokument
Bei weiteren bekannten Lösungen werden die Störleisten direkt mit dem Zylindermantel verbunden.In other known solutions, the spoiler bars are connected directly to the cylinder jacket.
Die Ausführungen im Stand der Technik haben den Nachteil, dass sie teuer in der Herstellung der Verbindungen von Störleiste und Haltering bzw. Zylindermantel sind und zudem lange Montagezeiten erfordern. Die bekannten Systeme erfordern einen hohen Materialeinsatz und sind dementsprechend sehr schwer. Dies erschwert die Handhabung insbesondere bei der Montage und Demontage. Ein weiterer Nachteil im Stand der Technik ist die Fixierung der Störleisten an der inneren Mantelfläche des Trockenzylinders. Diese können sich während des Betriebs verschieben.The designs in the prior art have the disadvantage that they are expensive in the production of the compounds of the fault strip and retaining ring or cylinder jacket and also require long assembly times. The known systems require a high material usage and are therefore very heavy. This complicates the handling, especially during assembly and disassembly. Another disadvantage in the prior art is the fixation of the spoiler bars on the inner surface of the drying cylinder. These can shift during operation.
Die Aufgabe der Erfindung liegt darin, zum einen eine kostengünstige, variable Lösung zur Verbindung von Störleisten und Halteringen anzugeben, die auch eine einfache Montage und Demontage ohne Spezialwerkzeuge sowie einen modulartigen Aufbau der Vorrichtung ermöglicht und zum anderen einen sicheren Sitz des Leistenkäfigs im Trockenzylinder gewährleistet.The object of the invention is to provide a cost-effective, variable solution for connecting spoiler bars and retaining rings, which also allows easy assembly and disassembly without special tools and a modular design of the device and on the other ensures a secure fit of the inguinal cage in the drying cylinder.
Erfindungsgemäß wird die Aufgabe für einen gattungsgemäßen Trockenzylinder dadurch gelöst, dass der mindestens eine Haltering zumindest mit einem Teil der Störleisten formschlüssig verbunden ist.According to the invention the object is achieved for a generic drying cylinder, characterized in that the at least one retaining ring is positively connected at least with a portion of the spoiler.
Durch die erfindungsgemäße Lösung wird eine schnelle und werkzeuglose Montage der Halteringe mit den Störleisten ermöglicht. Diese einfache Konstruktion der Vorrichtung besteht aus wenigen unterschiedlichen Bauelementen, so dass eine Standardisierung unter wirtschaftlichen Gesichtspunkten möglich und vereinfacht wird. Daraus resultiert auch eine Kostenreduzierung dieser Vorrichtung gegenüber den bekannten Vorrichtungen. Durch die Anordnung der U-förmigen Störleisten dergestalt, dass die offenen Seiten zur Mantelfläche des Trockenzylinders zeigen, wird die Flächenpressung zwischen den Schenkeln des U-Profils und der Mantelfläche erhöht und so eine gesicherte Position der Störleisten gewährleistet. Dies ist insbesondere in Bezug auf die erfindungsgemäße formschlüssige Verbindung von Vorteil.The solution according to the invention enables a quick and tool-free installation of the retaining rings with the spoiler bars. This simple construction of the device consists of a few different components, so that standardization is possible and simplified from an economic point of view. This also results in a cost reduction of this device over the known devices. The arrangement of the U-shaped spoiler bars in such a way that the open sides to the outer surface of the drying cylinder, the surface pressure between the legs of the U-profile and the lateral surface is increased, thus ensuring a secure position of the spoiler. This is particularly advantageous in relation to the positive connection according to the invention.
In einer vorteilhaften praktischen Ausführungsform weisen die Störleisten Fixieröffnungen und der mindestens eine Haltering Fixierlaschen auf. Diese bilden zusammen den Formschluss. Der Querschnitt der Fixieröffnungen kann rund oder vorzugsweise rechteckig oder quadratisch ausgeführt sein. Die Fixierlaschen sind vorzugsweise mit der entsprechenden komplementären Form ausgeführt. Die Fixierlaschen können separate Bauteile darstellen, welche an den jeweiligen Haltering montiert werden oder bei der Herstellung des jeweiligen Halterings aus einem Materialstück erzeugt worden sein.In an advantageous practical embodiment, the spoiler bars have fixing openings and the at least one retaining ring has fixing lugs. These together form the positive connection. The cross section of the fixing openings may be round or preferably rectangular or square. The fixing tabs are preferably made with the corresponding complementary shape. The fixing lugs may be separate components, which are mounted on the respective retaining ring or produced during the production of the respective retaining ring from a piece of material.
In einer vorteilhaften Ausgestaltung ist die formschlüssige Verbindung so ausgeführt, dass in radialer Richtung einen Freiheitsgrad besteht. So kann sich die Störleiste relativ zum Haltering in radialer Richtung bewegen um beispielsweise kleine Geometrieunterschiede der Bauteile auszugleichen. In axialer Richtung und in Umfangsrichtung sind im Wesentlichen jedoch keine Relativbewegungen möglich.In an advantageous embodiment, the positive connection is designed so that there is a degree of freedom in the radial direction. Thus, the fault strip can move relative to the retaining ring in the radial direction to compensate, for example, small differences in geometry of the components. In the axial direction and in the circumferential direction, however, essentially no relative movements are possible.
Vorteilhafterweise sind die Fixieröffnungen der Störleisten und die Fixierlaschen der Halteringe jeweils paarweise angeordnet.Advantageously, the fixing holes of the spoiler bars and the fixing tabs of the retaining rings are arranged in pairs.
Gemäß einer alternativen Ausführungsform befinden sich die Fixieröffnungen in den Halteringen und die Fixierlaschen in den Störleisten.According to an alternative embodiment, the fixing holes in the retaining rings and the fixing tabs are in the spoiler bars.
Die Anzahl der Fixieröffnungen beziehungsweise der Fixierlaschen in den Störleisten ist mindestens gleich der Anzahl der Halteringe, vorzugsweise ist sie jedoch größer. Dadurch kann der Abstand der Halteringe in axialer Richtung flexibel und variabel eingestellt werden, ohne Veränderungen an den Störleisten vornehmen zu müssen. So kann beispielsweise der Abstand in den Randbereichen des Trockenzylinders kleiner als im mittleren Bereich gewählt sein.The number of fixing holes or the fixing tabs in the spoiler bars is at least equal to the number of retaining rings, but preferably it is larger. Thereby, the distance of the retaining rings in the axial direction can be flexibly and variably adjusted without having to make changes to the spoiler bars. For example, the distance in the edge regions of the drying cylinder may be smaller than in the middle region.
Vorteilhaft ist, wenn die Störleisten aus U-förmigen Leisten bestehen und die offene Seite einer U-förmigen Leiste zur Mantelfläche des Trockenzylinders gerichtet ist. Die Kontaktflächen der Schenkel der Störleisten erstrecken sich über die gesamte Länge der jeweiligen Störleiste.It is advantageous if the spoiler strips consist of U-shaped strips and the open side of a U-shaped strip is directed to the lateral surface of the drying cylinder. The contact surfaces of the legs of the Störleisten extend over the entire length of the respective Störleiste.
Für einen sicheren Halt der Störleisten an der Mantelfläche liegt die Schenkelbreite der Störleisten im Bereich von 0,8 mm und 6 mm, insbesondere im Bereich von 1,5 mm und 3 mm aufweisen. Wird das U-Profil aus einem Metallblech hergestellt, so entspricht die Schenkelbreite der Blechstärke. In einer praktischen Ausführung beträgt die Blechstärke beispielsweise 2mm.For a secure hold of the faulty strips on the lateral surface is the leg width of the spoiler bars in the range of 0.8 mm and 6 mm, in particular in the range of 1.5 mm and 3 mm. If the U-profile is made from a metal sheet, then the leg width corresponds to the sheet thickness. In a practical embodiment, the sheet thickness is for example 2mm.
Die Höhe einer Störleiste liegt im Bereich von 3 mm bis 30 mm, vorzugsweise zwischen 5 mm und 12 mm. In einem praktischen Beispiel liegt sie bei 8 mm.The height of a faulty strip is in the range of 3 mm to 30 mm, preferably between 5 mm and 12 mm. In a practical example, it is 8 mm.
Die Breite einer Störleiste liegt im Bereich von 8 mm bis 50 mm, vorzugsweise zwischen 12 mm und 30 mm. In einem praktischen Beispiel liegt sie bei 20 mm.The width of a noise strip is in the range of 8 mm to 50 mm, preferably between 12 mm and 30 mm. In a practical example, it is 20 mm.
Diese Geometrie der Störleisten hat sich als sehr effektiv bezüglich der Wärmeübergangserhöhung vom Dampfraum im Trockenzylinder zum Mantel erwiesen. Der sich bei der Kondensation des Heizdampfes bildende Kondensatring wird optimal gestört.This geometry of the spoiler bars has proven to be very effective in increasing the heat transfer from the vapor space in the drying cylinder to the jacket. The forming in the condensation of the heating steam condensate ring is disturbed optimally.
In einer praktischen Ausgestaltungsvariante liegen die Kontaktflächen der Schenkel der Störleisten nur abschnittsweise an der Mantelfläche an. In diesem Falle weisen die Kontaktflächen Rücksprünge auf.In a practical embodiment variant, the contact surfaces of the legs of the fault strips are only partially on the lateral surface. In this case, the contact surfaces have recesses.
Für einen sicheren Halt der Störleisten an der Mantelfläche des Trockenzylinders ist es von Vorteil, wenn die Kanten der die Mantelfläche berührenden Kontaktflächen der Schenkel scharfkantig ausgeführt sind. Unter "scharfkantig" ist eine nach mechanischer Bearbeitung entgratete Kante zu verstehen. Der Radius liegt unter 0,5 mm. Der Leistenkäfig wird reibschlüssig an der Mantelfläche des Trockenzylinders gehalten.For a secure hold of the faulty strips on the lateral surface of the drying cylinder, it is advantageous if the edges of the contact surface of the legs contacting the lateral surface are designed sharp-edged. Under "sharp-edged" is an edge deburred after mechanical machining understand. The radius is less than 0.5 mm. The strip cage is frictionally held on the lateral surface of the drying cylinder.
Zweckmäßigerweise bestehen die Halteringe aus U-förmigen Leisten.Conveniently, the retaining rings consist of U-shaped strips.
Bei einer praktischen Ausführungsform bestehen die Halteringe aus einem oder mehreren Halteringsegmenten. Vorzugsweise entspricht die Anzahl der Halteringsegmente einer Primzahl. Dadurch entstehen keine oder nur geringe Unwuchten. Besonders vorteilhaft sind Halteringe, die aus drei Halteringsegmenten bestehen. Solche Systeme haben die Eigenschaft der Selbstzentrierung. Die Halteringe sind vorteilhafterweise rotationssymmetrisch ausgeführt.In a practical embodiment, the retaining rings consist of one or more retaining ring segments. Preferably, the number of retaining ring segments corresponds to a prime number. As a result, no or only small imbalances. Particularly advantageous are retaining rings, which consist of three retaining ring segments. Such systems have the property of self-centering. The retaining rings are advantageously designed rotationally symmetrical.
Zwischen dem einen oder den mehreren Halteringsegmenten sind jeweils mindestens ein Spannelement angeordnet. Das Spannelement kann als Zylinderfeder oder Spiralfeder ausgeführt sein und erzeugt im eingebauten Zustand die radiale Spannkraft auf die Störleiste und somit die Anpresskraft der Störleiste auf die Mantelfläche des Trockenzylinders.Between the one or more retaining ring segments at least one clamping element are arranged in each case. The clamping element can be designed as a cylindrical spring or coil spring and generates in the installed state, the radial clamping force on the Störleiste and thus the contact pressure of the Störleiste on the outer surface of the drying cylinder.
In einer weiteren praktischen Ausgestaltung sind auf beiden Seiten der Spannelemente Verbindungselemente zur Verbindung der Spannelemente mit den Halteringsegmenten angeordnet.In a further practical embodiment, connecting elements for connecting the clamping elements to the retaining ring segments are arranged on both sides of the clamping elements.
Die Verbindungselemente sind so ausgeführt, dass der Abstand der Verbindungselemente und somit die Länge des Spannelementes veränderbar ist. Wird beispielsweise eine Zylinderfeder als Spannelement eingesetzt, so können die Verbindungselemente jeweils mit zwei Laschen zur Aufnahme von Spannschrauben ausgeführt sein. Mittels der die Verbindungselemente verbindenden Spannschrauben kann nun der Abstand der Verbindungselemente verkürzt und somit die Zylinderfeder zusammengedrückt werden. In diesem gespannten Zustand ist der Durchmesser der Halteringe kleiner, wodurch die Halteringe beziehungsweise der Störleisten und Halteringe mit Spannelementen umfassende Leistenkäfig leicht in den Trockenzylinder eingebaut werden kann. Im eingebauten Zustand werden die Spannschrauben entlastet und dadurch der Leistenkäfig in Betriebsposition gebracht. Die Anordnung der Spannelemente und Verbindungselemente ist so gewählt, dass die Wirkungslinie der auf die Halteringsegmente wirkenden Aufweitkraft im Wesentlichen mit der Achse des Spannelements zusammenfällt. Dadurch werden Biegemomente auf die Halteringsegmente infolge der Aufweitkraft vermieden.The connecting elements are designed so that the distance between the connecting elements and thus the length of the clamping element is variable. If, for example, a cylindrical spring is used as the clamping element, the connecting elements can each be designed with two lugs for receiving clamping screws. By means of the connecting elements connecting the clamping screws now the distance of the connecting elements can be shortened and thus the cylinder spring can be compressed. In this tensioned state, the diameter of the retaining rings smaller, so that the retaining rings or the spoiler bars and retaining rings with clamping elements comprehensive cage cage can be easily installed in the drying cylinder. When installed, the clamping screws are relieved and thus brought the inguinal cage in operating position. The arrangement of the clamping elements and connecting elements is chosen so that the line of action of the force acting on the retaining ring segments expansion force substantially coincides with the axis of the clamping element. As a result, bending moments are avoided on the retaining ring segments due to the expansion force.
Ein Trockenzylinder kann in einer bevorzugten Ausführungsform mit mehreren Leistenkäfigmodulen bestückt sein. Ein Leistenkäfigmodul zeichnet sich dadurch aus, dass die Länge der Störleisten kürzer ist als die Mantelfläche des Innenraumes eines die Länge L in axialer Richtung aufweisenden Trockenzylinders. Somit können mehrere gleichartige Leistenkäfigmodule in axialer Richtung hintereinander eingebaut sein. Durch die Modulbauweise wird die Fertigung vereinfacht und die Fertigungskosten werden gesenkt.A drying cylinder can be equipped in a preferred embodiment with multiple inguinal cage modules. A strip cage module is characterized in that the length of the spoiler strips is shorter than the lateral surface of the interior of a length L in the axial direction having drying cylinder. Thus, several similar inguinal cage modules can be installed one behind the other in the axial direction. Modular design simplifies manufacturing and reduces manufacturing costs.
Für die Ausrüstung eines Trockenzylinders mit einem Leistenkäfig können somit mehrere gleichartige Leistenkäfigmodule eingesetzt werden. Es müssen lediglich die Längen der Leistenkäfige in den Randbereichen an die Länge des Trockenzylinders angepasst werden. Hier kommt vorteilhafterweise die Ausgestaltungsvariante zum Tragen, bei der die Anzahl der Fixieröffnungen bzw. Fixierlaschen in den Störleisten größer als die Anzahl der Halteringe ist. Durch diese Ausführung kann der Abstand der Halteringe in den Randbereichen enger als in der Mitte ausgeführt werden.For the equipment of a drying cylinder with a last cage several similar inguinal cage modules can thus be used. It is only necessary to adapt the lengths of the strip cages in the edge regions to the length of the drying cylinder. Here advantageously the embodiment variant comes into play, in which the number of fixing holes or fixing straps in the spoiler bars is greater than the number of retaining rings. By this embodiment, the distance of the retaining rings in the edge regions can be made narrower than in the middle.
In einer bevorzugten Ausführungsform betragen die Längen der einzelnen Störleisten und somit eines Leistenkäfigmoduls 2 Meter. Im mittleren Bereich beträgt der Abstand der Halteringe 500 mm, in den Randbereichen 250 mm. Störleisten und Halteringe können aus gleichen oder verschiedenen Werkstoffen bestehen. Zweckmäßige Werkstoffe sind metallische Werkstoffe, wie Stahl, Edelstahl, Messing oder nichtmetallische Werkstoffe wie beispielsweise Kunststoffe, faserverstärkte Werkstoffe usw..In a preferred embodiment, the lengths of the individual spoiler bars and thus of a last cage module are 2 meters. In the middle area, the distance of the retaining rings is 500 mm, in the border areas 250 mm. Cleats and retaining rings can be made of the same or different materials. Appropriate materials are metallic materials, such as steel, stainless steel, brass or non-metallic materials such as plastics, fiber-reinforced materials, etc ..
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele unter Bezugnahme auf die Zeichnung.Further features and advantages of the invention will become apparent from the following description of preferred embodiments with reference to the drawings.
Es zeigen
- Figur 1
- einen beispielhaften, erfindungsgemäßen dampfbeheizbaren Trockenzylinders mit einem Leistenkäfigmodul
Figur 2- eine beispielhafte Ausführungsform des erfindungsgemäßen Leistenkäfigs im Querschnitt senkrecht zur Längsachse des Trockenzylinders.
Figur 3- eine beispielhafte, erfindungsgemäße Ausführungsform eines Teils einer Störleiste
Figur 4- eine beispielhafte, erfindungsgemäße Ausführungsform eines Teils eines Halteringsegments
Figur 5- den Schnitt X-X der Ausführungsform eines Teils eines Halteringsegments der
Figur 4 Figur 6- ein Spannelement mit zwei Verbindungselementen.
Figur 7- zeigt eine Seitenansicht der
Figur 6 im Schnitt.
- FIG. 1
- an exemplary, steam-heatable drying cylinder according to the invention with a inguinal cage module
- FIG. 2
- an exemplary embodiment of the inguinal cage according to the invention in cross section perpendicular to the longitudinal axis of the drying cylinder.
- FIG. 3
- an exemplary, inventive embodiment of a part of a faulty strip
- FIG. 4
- an exemplary, inventive embodiment of a portion of a retaining ring segment
- FIG. 5
- the section XX of the embodiment of a part of a retaining ring segment of
FIG. 4 - FIG. 6
- a clamping element with two connecting elements.
- FIG. 7
- shows a side view of
FIG. 6 on average.
Die
In der
In der
In der
Die
Die
In der
- 11
- Trockenzylinderdrying cylinders
- 1.11.1
- Mantelflächelateral surface
- 22
- StörleisteStörleiste
- 33
- Halteringretaining ring
- 3.13.1
- HalteringsegmentRetaining ring segment
- 3.23.2
- HalteringsegmentRetaining ring segment
- 3.33.3
- HalteringsegmentRetaining ring segment
- 44
- Spannelementclamping element
- 55
- Schenkelbreite der StörleisteThigh width of the fault strip
- 5.15.1
- StörleistenbreiteStörleistenbreite
- 5.25.2
- StörleistenhöheStörleistenhöhe
- 5.35.3
- Schenkelleg
- 5.45.4
- StörleistenrückenStörleistenrücken
- 66
- Fixierlaschefixing flap
- 77
- Fixieröffnungpegging
- 88th
- Verbindungselementconnecting element
- 8.18.1
- Abstütznasesupport nose
- 8.28.2
- Zentrierlaschecentering bracket
- 8.38.3
- SpannelementaufnahmeClamping element receptacle
- 8.48.4
- Spannlascheinstep strap
- 8.58.5
- Rampenramps
- 99
- Verbindungselementconnecting element
- 9.19.1
- Abstütznasesupport nose
- 9.29.2
- Zentrierlaschecentering bracket
- 9.39.3
- SpannelementaufnahmeClamping element receptacle
- 9.49.4
- Spannlascheinstep strap
- 9.59.5
- Rampenramps
- 1010
- Vorrichtung, LeistenkäfigDevice, inguinal cage
- 1111
- Spannschraubeclamping screw
Claims (15)
- Steam-heatable drying cylinder (1) for drying a material web, in particular a paper, board or tissue web, comprising an interior having a circumferential surface (1.1) and a device for increasing the heat transfer from the interior to the circumferential surface (1.1), the device (10) comprising a plurality of spoiler bars (2) arranged in the circumferential direction, aligned axially and touching the circumferential surface (1.1), and at least one retaining ring (3) extending in the circumferential direction and having at least one tensioning element (4), the at least one retaining ring (3) interacting with the at least one tensioning element (4) in such a way that a radial tensioning force of the at least one retaining ring (3) acting on the spoiler bars (2) is produced,
characterized in that
the spoiler bars (2) are formed as a U-profile, the open side of which points towards the circumferential surface (1.1), and
the at least one retaining ring (3) is connected to at least one part of the spoiler bars (2) by a form fit. - Drying cylinder according to Claim 1,
characterized in that
the spoiler bars (2) have fixing openings (7) and the at least one retaining ring (3) has fixing lugs (6), which together form the form fit. - Drying cylinder according to Claim 2,
characterized in that
the form fit has a degree of freedom in the radial direction. - Drying cylinder according to one of the preceding claims,
characterized in that
the fixing openings (7) and the fixing lugs (6) are respectively provided in pairs. - Drying cylinder according to one of the preceding claims,
characterized in that
the number of fixing openings (7) is greater than the number of fixing lugs (6). - Drying cylinder according to one of the preceding claims,
characterized in that
the limbs (5.3) of the spoiler bars (2) have a limb width (5) in the range from 0.8 mm to 6 mm, in particular in the range from 1.5 to 3 mm. - Drying cylinder according to one of the preceding claims,
characterized in that
the limbs (5.3) of the spoiler bars (2) rest on the circumferential surface (1.1), at least in some sections. - Drying cylinder according to Claim 7,
characterized in that
the edges of the surfaces of the limbs (5.3) that touch the circumferential surface (1.1) are designed to be sharp-edged. - Drying cylinder according to one of the preceding claims,
characterized in that
the at least one retaining ring (3) consists of a U-shaped bar. - Drying cylinder according to one of the preceding claims,
characterized in that
the at least one retaining ring (3) comprises one or more retaining ring segments (3.1). - Drying cylinder according to Claim 10,
characterized in that
the number of retaining ring segments (3.1) corresponds to a prime number. - Drying cylinder according to Claim 10,
characterized in that
in each case at least one tensioning element (4) is arranged between the one or more retaining ring segments (3.1). - Drying cylinder according to Claim 12,
characterized in that
connecting elements (9) to be connected to the retaining ring segments (3.1, 3.2, 3.3) are arranged on both sides of the tensioning elements (4). - Drying cylinder according to Claim 13,
characterized in that
the spacing of the connecting elements (9) and thus the length of the tensioning element (4) can be varied. - Drying cylinder according to one of the preceding claims,
characterized in that
the circumferential surface (1.1) of the interior has a length L in the axial direction and the lengths of the spoiler bars (2) are shorter than L.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200910001593 DE102009001593A1 (en) | 2009-03-17 | 2009-03-17 | Steam-heated drying cylinder with internal strips to increase the heat output |
PCT/EP2010/052386 WO2010105895A1 (en) | 2009-03-17 | 2010-02-25 | Steam-heated drying cylinder having internal strips for increasing the heat capacity |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2408964A1 EP2408964A1 (en) | 2012-01-25 |
EP2408964B1 true EP2408964B1 (en) | 2013-01-02 |
Family
ID=42338310
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10705871A Not-in-force EP2408964B1 (en) | 2009-03-17 | 2010-02-25 | Steam-heated drying cylinder with internal bars for increasing the heat capacity |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2408964B1 (en) |
CN (1) | CN102348850A (en) |
BR (1) | BRPI1006201B1 (en) |
DE (1) | DE102009001593A1 (en) |
WO (1) | WO2010105895A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9562324B2 (en) * | 2011-05-03 | 2017-02-07 | Gregory L. Wedel | Turbulence bar assembly |
CN104611977B (en) * | 2015-02-10 | 2017-04-05 | 轻工业杭州机电设计研究院 | The paper machine dryer of soldering with rib structure and preparation method thereof |
DE102017123541A1 (en) * | 2017-10-10 | 2019-04-11 | Voith Patent Gmbh | Drying cylinder for a paper machine |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4195417A (en) * | 1979-01-19 | 1980-04-01 | Beloit Corporation | Dryer drum with magnetic spoiler bars |
FI66220C (en) * | 1983-03-01 | 1984-09-10 | Valmet Oy | TORKCYLINDRARNA I EN PAPPER MASKIN FOER ATT FOERBAETTRA VAERMEOEVERFOERINGEN |
DE4311936A1 (en) * | 1993-04-10 | 1993-10-07 | J M Voith Ag St Poelten | Balancing weight positioning system for roller, drum or cylinder casing - using hard positioning pins with pointed ends for penetrating material of cylinder inside wall around central support. |
US5528838A (en) * | 1994-03-25 | 1996-06-25 | The Johnson Corporation | Insulated dryer drum |
US7028756B2 (en) | 2002-05-17 | 2006-04-18 | The Johnson Corporation | Apparatus for increasing a transfer of thermal energy through an inner surface of a hollow cylindrical dryer of a papermaking machine |
DE102005000795A1 (en) * | 2005-01-05 | 2006-07-13 | Voith Paper Patent Gmbh | Apparatus and method for producing and / or refining a fibrous web |
CN101194069A (en) * | 2005-05-13 | 2008-06-04 | 沃依特专利有限责任公司 | Drying cylinder |
-
2009
- 2009-03-17 DE DE200910001593 patent/DE102009001593A1/en not_active Withdrawn
-
2010
- 2010-02-25 WO PCT/EP2010/052386 patent/WO2010105895A1/en active Application Filing
- 2010-02-25 CN CN2010800120003A patent/CN102348850A/en active Pending
- 2010-02-25 EP EP10705871A patent/EP2408964B1/en not_active Not-in-force
- 2010-02-25 BR BRPI1006201-7A patent/BRPI1006201B1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
BRPI1006201B1 (en) | 2019-06-25 |
DE102009001593A1 (en) | 2010-09-23 |
EP2408964A1 (en) | 2012-01-25 |
WO2010105895A1 (en) | 2010-09-23 |
CN102348850A (en) | 2012-02-08 |
BRPI1006201A2 (en) | 2018-03-27 |
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