EP1036877B1 - Rotor with wear protector for a pulper - Google Patents

Rotor with wear protector for a pulper Download PDF

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Publication number
EP1036877B1
EP1036877B1 EP19990104475 EP99104475A EP1036877B1 EP 1036877 B1 EP1036877 B1 EP 1036877B1 EP 19990104475 EP19990104475 EP 19990104475 EP 99104475 A EP99104475 A EP 99104475A EP 1036877 B1 EP1036877 B1 EP 1036877B1
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EP
European Patent Office
Prior art keywords
rotor
rotor blade
wear protector
front surface
wear
Prior art date
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.)
Expired - Lifetime
Application number
EP19990104475
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German (de)
French (fr)
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EP1036877A1 (en
Inventor
Roland Reinhold
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
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Voith Paper Patent GmbH
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Filing date
Publication date
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Priority to DE59901791T priority Critical patent/DE59901791D1/en
Priority to EP19990104475 priority patent/EP1036877B1/en
Publication of EP1036877A1 publication Critical patent/EP1036877A1/en
Application granted granted Critical
Publication of EP1036877B1 publication Critical patent/EP1036877B1/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/34—Kneading or mixing; Pulpers
    • D21B1/345—Pulpers
    • D21B1/347—Rotor assemblies

Definitions

  • the invention relates to a rotor for a stock preparation machine, which is arranged in a container of the stock preparation machine and a plurality of rotor blades for circulating one in the container contained stock suspension and for crushing in the stock suspension Contained paper material, with one in the direction of rotation seen from the rotor leading front surface of each rotor blade wear protection is releasably attached.
  • the invention further relates to a Wear protection according to the preamble of claim 6 for the protection of a Rotor blade on a rotor of a stock preparation machine.
  • WO 98/49 389 describes a pulper with one in a container rotatably drivable rotor.
  • the rotor has a helical screw Circulating the stock suspension in the container, taking on the bottom the helix with the same distance from each other several radially rotor blades projecting outwards are formed.
  • On the in the direction of rotation seen from the rotor leading front surface of each rotor blade wear protection releasably attached.
  • From GB 5018 A.D. 1914 is a rotor for a stock preparation machine known, the two or three radially outwardly projecting rotor blades having. Wear protection is provided at the free end of each rotor blade made of a wear-resistant material by screws, rivets, Pin or the like releasably attached.
  • BE 1 010 118 also describes one for a stock preparation machine usable rotor with multiple blades that each with an arcuate course in the direction of the respective free End of decreasing cross-section, with one on each rotor blade arcuate wear protection is releasably attached.
  • EP 328 500 A2 describes a rotor for a stock preparation machine known, on the radially outwardly projecting from its hub Each rotor blade is attached to a wear protection, whereby on the front surface of each wear protection, as seen in the direction of rotation Form elements are formed.
  • the wear protection attached to each rotor blade easily expanded and with a new wear protection be replaced. This can be expensive on the currently usual Welding work on the rotor blades can be dispensed with, through which the Material structure of the rotor blades is adversely affected. Furthermore are the edges on the wear protection accordingly before installation pre-processed so that a time-consuming grinding of the edges on the rotor eliminated.
  • the wear protection with its side edges at least partially extends beyond the contour delimiting the front surface of the rotor blade, are the edges of the rotor blade due to the wear protection protected so that the rotor blades through the use the wear protection designed according to the invention compared to that in conventionally protected against wear rotor blades over a are ready for use for a longer period of time.
  • the rotor it is proposed that at least a portion of the front surface of the respective rotor blade, that starts from the free end of the rotor blade, completely with the Cover wear protection. This ensures that in particular the partial section starting from the free end of the rotor blade of the rotor blade, which is smaller compared to the radial sections Distance to the axis of rotation of the rotor due to the higher peripheral speed is exposed to correspondingly higher loads, is adequately protected against wear.
  • the wear protection is preferably a reliable Screw connection used.
  • a reliable Screw connection used for this purpose, one is preferred Embodiment of wear protection on the front surface of the rotor blade facing back at least one Bolt provided, which is preferably on the rotor blade by a self-locking nut can be screwed.
  • a Screw connection is a very quick and easy exchange of the Wear protection possible.
  • wear protection can be found on the back a centering pin or a key may be provided, the or received in a bore or groove formed on the rotor blade is what the wear protection during operation attacking radial, shear and / or shear forces are absorbed.
  • the centering pin can also be attached to the rotor blade and in one Drill hole on the lock protection must be included.
  • At least one of the side edges of the wear protection to form several recesses with which the circulating movements in the stock suspension during the rotation of the Rotors can be influenced in a targeted manner.
  • FIG. 1 shows a top view of a first exemplary embodiment of a rotor 10 for a stock preparation machine (not shown), such as a pulper, a pulper, a fiberizer or the like.
  • the rotor 10 has a rotationally symmetrical base body 12, by a correspondingly designed shaft-hub connection with the Drive shaft of an electric drive (not shown) of the stock preparation machine connected is.
  • the rotor 10 is within one Container (not shown) of the stock preparation machine.
  • Every rotor blade 14 is designed as a plate and has the shape of an unequal leg Trapezium.
  • the rotor blade 14 is on the base body 12 attached that it with its flat side in a parallel to the axis of rotation of the rotor 10 extending plane is arranged and in tangential Running towards the base body 12, with its longer one of the two parallel side edges on the base body is welded.
  • an approximately triangular support plate 16 is provided, which in a perpendicular is arranged to the axis of rotation of the rotor 10 extending plane.
  • the Support plate 16 is with one of its side edges on the in the direction of rotation 18 of the rotor 10 seen (counterclockwise in Fig. 1) leading Front surface 20 of the subsequent rotor blade 14 and the Shell surface of the base body 12 welded.
  • the support plate 16 is there arranged so that with its longest side edge on the in the direction of rotation 18 seen subsequent rear surface 22 of the upstream Rotor blade 14 rests and supports the rotor blade 14.
  • Wear protection 42 is provided on the front surface 20 of each rotor blade 14 made of a particularly wear-resistant material, preferably one stainless, alloyed stainless steel, such as a chrome-nickel-molybdenum steel, attached. 2 shows, the shape of the Wear protection 42 in approximately the shape of the rotor blade 14, the Wear protection 42 is dimensioned so that it over the free end 30 and the two side edges 32 and 34 of the respective rotor blade 14 protrude.
  • On the front surface facing away from the front surface 20 of the rotor blade 14 44 of the wear protection 42 is one in the side edges of the wear protection 42 partially merging, raised edge 46 formed, which is indicated in Fig. 2 by cross hatching. As in Fig. 1 shown, the raised edge 46 is provided with a chamfer so that the Wear protection 42 is chamfered on its side edges.
  • each wear protection 42 From the rear face facing the front surface 20 of the rotor blade 14 48 of each wear protection 42 are three bolts 50, 52 and 54, each of which is designed in a wear protection 42 Bore recorded and welded in this. Each bolt 50, 52 and 54 of the wear protection 42 protrudes through one of the Through bores 24, 26 and 28 and the sleeve assigned to them 36, 38 or 40. On the protruding from the sleeve 36, 38 or 40 Bolt 50, 52 or 54 is a nut 56, 58 or 60 screwed, with the wear protection 42 releasably on the respective rotor blade 14 is attached. To loosen the nuts 56, 58 and 60 during the To avoid rotation of the rotor 10 are in the present case self-locking nuts used. Instead of self-locking nuts other fuses can also be used that prevent the Prevent screw connections. For example, spring washers are suitable Tab washers with rags that are bent over or crown nuts, which are secured by split pins.
  • the rotor 10 For mixing the stock suspension in the container of the stock preparation machine the rotor 10 with the help of the electric drive spun.
  • the rotor blades 14 produce with them attached wear protection 42 both in the direction of the axis of rotation of the rotor 10 and in the radial direction with respect to the axis of rotation the rotor 10 flow movements through which the stock suspension is mixed. Any paper material contained in the stock suspension or even bales of paper thrown into the stock suspension at the same time from those formed on each wear protection 42 Edges crushed. Due to the finely divided fibers in the stock suspension the wear protection 42 are exposed to high wear, the Edges of each wear protection 42 are gradually rounded off.
  • FIG. 3 and 4 is a second embodiment of a rotor 70 shown.
  • the rotor 70 in a stock preparation machine (not shown) used, the Containers (not shown) has a sieve (not shown) through that the stock suspension flows out of the container.
  • the rotor 70 is in the immediate vicinity Arranged near the sieve and has next to its usual Function to circulate the stock suspension in the tank and floating Shred paper components, also the function of a expertsrs and should keep the sieve free of blockages.
  • the rotor 70 of which only a section is shown in FIG. 3, has a rotationally symmetrical base body 72 which rotatably with the An electric drive shaft (not shown) is connected. At the The circumference of the base body 72 is a plurality which are evenly spaced from one another Rotor blades 74 attached. Each rotor blade 74 has an attachment portion 76 (cf. FIG. 4) with which it is, for example, on the base body 72 is attached by screws. The attachment portion 76 goes in a rotor blade section 78 which is approximately perpendicular to the axis of rotation of the rotor 70 extending plane and an approximately triangular Has shape, the free end 80 shown in Fig. 3 blunt expires.
  • the rotor blade section 78 is arranged relative to the base body 72, that seen in the direction of rotation 82 of the rotor 70, subsequent rear surface 84 of the rotor blade 74 with respect to the axis of rotation of the rotor 70 runs radially, while one in the direction of rotation 82 of the Rotor 70 seen leading front surface 86 of the rotor blade 74 obliquely runs with respect to the base body 72.
  • the front surface 86 there are three holes at the same distance from one another 88, 90 and 92 formed, which are perpendicular to the rear surface 84 of the rotor blade 74 extend.
  • the two bores are 88 and 90 with a smaller radial distance from the axis of rotation of the rotor 70 formed as blind holes, while the farthest from the axis of rotation of the rotor 70 formed bore 92 as a through bore is formed and on the rear surface 84 of the rotor blade 74 in a recess 94 ends.
  • the rotor blade section 78 essentially has a rectangular cross-sectional shape and goes towards its free End 80 into an end section 96, the cross section of which is continuous increases and towards the bottom of the container Underside of the rotor blade 74 runs beveled, the radial distance the face of the free end 80 with respect to the axis of rotation decreases continuously.
  • a plate-shaped wear protection is on the front surface 86 of the rotor blade 74 98 attached, the contour of which is essentially the cross-sectional shape of the rotor blade section 78 and the end section 96 of the Rotor blade 74 corresponds.
  • Wear protection 98 is dimensioned such that it with its contour over the front surface 86 of the rotor blade 74 delimiting Contour protrudes, with its face parallel to the face of the end section 96 runs (see FIG. 3).
  • the rotor blade 74 stands from the rear face facing the front face 86 100 of wear protection 98 two pins 102 and 104 and one Bolt 106 off. Pins 102 and 104 and the bolt 106 are received in bores formed on the lock protection 98 and welded into it. 3 shows, the two run Pins 102 and 104 and the bolt 106 inclined to Back 100 of wear protection 98.
  • the angle of inclination of the pins 102 and 104 and the bolt 106 with respect to the rear 100 corresponds to the angle at which the front surface 86 of the rotor blade 74 extends with respect to the rear surface 84 of the rotor blade 74.
  • the two pins 102 and 104 are received in the blind holes 88 and 90.
  • the bolt 106 protrudes through the through hole 92 into the recess 94.
  • a nut 108 is screwed on.
  • a self-locking nut is used as nut 108, to prevent loosening of the screw connection.
  • a self-locking nut Fuses for screw connections are used.
  • the rotor 70 becomes circulating the stock suspension contained in the stock of the stock preparation machine used. This prevents from a particularly wear-resistant Material made wear protection 98 that the front surface 86 of the rotor blade 74 by and through the particles in the stock suspension after is removed. As soon as the wear protection 98 is no longer the desired one Circulation and crushing in the stock suspension contained paper materials and keeping the strainer of the container clear guaranteed, the wear protection 98 is replaced. To this Purpose when the rotor 70 is stationary, only the nut 108 of the respective Wear protection 98 released, the old wear protection 98 removed and be replaced by a new wear protection, which then again firmly connected to the rotor blade 74 with the aid of the nut 108 becomes.
  • FIG. 5 to 7 show a third exemplary embodiment of a rotor 110 for a stock preparation machine.
  • the structure of the rotor 110 corresponds essentially to the structure of that in the second embodiment described rotor 70.
  • the rotor 110 differs from the rotor 70 in that instead of two blind holes and one Through hole in the rotor blade 112 two through holes 114 and 116 are formed while the third bore is least radial Distance to the axis of rotation of the rotor 110 is formed as a blind hole 118 is.
  • the two through holes 114 and 116 each end in a formed on the rear surface 120 of the rotor blade 112 Recess 122 or 124.
  • the wear protection 126 of the third exemplary embodiment has a 128 on its rear side Pin 130 and two bolts 132 and 134, each in one Bore on wear protection 126 added and welded in this are.
  • the wear protection 126 mounted on the rotor blade 112 the pin 130 received in blind hole 118 while the two Bolts 132 and 134 through the two through holes 114 and 116 protrude into the two recesses 122 and 124.
  • On the in the recess 122 and 124 protruding portion of each bolt 132 and 134 a self-locking nut 136 or 138 is screwed, a release of the wear protection 126 from the rotor blade 112 prevented.
  • the wear protection 126 is plate-shaped, with its End face 142 arranged at the free end 140 of the rotor blade 112 accordingly the course of the free end 140 of the rotor blade 112 is and in the direction of the bottom facing the container bottom of the rotor blade 112 is tapered so that the radial distance of the Face 142 of wear protection 126 with respect to the axis of rotation of the rotor 110 decreases.
  • the end face 142 of the wear protection is further bevelled so that they are parallel to the free end 140 of the rotor blade 112 runs (see FIG. 5).
  • a support element 148 is centered on the central bore 116 the back 128 of the wear protection 126 welded. With the help of the wear protection is supported in the cross-section L-shaped support element 148 126 additionally on the top 144 of the rotor blade 112, as Fig. 7 shows what the screw connections between the bolts 132 and 134 and the nuts 136 and 138 are relieved. Furthermore, there are several on the upper edge of wear protection 126 Identically designed recesses 150 with a constant distance trained to each other. With the aid of the recesses 150, the circulating movement the stock suspension in the container of the stock preparation machine be influenced. Instead of rectangular cutouts can also have cutouts in the form of triangles, polygons, Semicircles, ovals or similar designs on the top Side edge of the wear protection 126 may be formed.
  • wear protection 126 can pass through in no time at all Loosen the two nuts 136 and 138 away and replace with a new one identical or differently designed wear protection are replaced, the then again through the nuts 136 and 138 on the rotor blade 112 is attached.
  • FIG. 8 shows a fourth embodiment of a rotor 160 for use in a stock preparation machine.
  • this rotor 160 there are a total of nine identically designed rotor blades on the base body 162 164 evenly attached to the circumference of the base body 162.
  • the flat sides of rotor blades 164 are perpendicular to the axis of rotation of the rotor 160 extending plane. Every rotor blade 164 has an arcuate course with in the direction of the respective free end 166 decreasing cross section.
  • each wear protection 172 On the front surface seen in the direction of rotation 168 of the rotor 160 170 of each rotor blade 164 a wear protection 172 is attached, almost the entire front surface of the respective rotor blade 164 covered. This forms the 160 viewed in the direction of rotation 168 of the rotor leading front 174 of each wear protector 172 a right angle surface extending to the plane of rotation of the rotor 160.
  • the front 174 it is also possible to design the front 174 so that it is inclined at an angle to the plane of rotation of the rotor 160, whereby depending on the course of the front 174 during the rotation of the Rotor 160 a suction or a pressure effect on the ground or the sieve of the container of the stock preparation machine is produced. Is the front surface 174 to the bottom or sieve of the container The fabric suspension is inclined at an acute angle from the floor promoted or sucked. In contrast, the front surface 174 runs below an obtuse angle inclined to the bottom or sieve of the container, the stock suspension is pressed in the direction of the bottom or sieve.
  • the wear protection 172 has an approximately U-shaped cross section or L-shaped shape and is attached to the respective rotor blade 164, wherein a leaking nose 176 of the respective wear protection 172 in the hub area near the base body 162 freely movable in a guide (not shown) rests.
  • To attach the wear protection 172 on Rotor blade 164 is two near free end 166 of rotor blade 164 Threads running parallel to the axis of rotation of the rotor 160 (not shown) trained.
  • On the upper leg of the U-shaped wear protection 172 two holes are formed with the wear protection installed 172 to the threads formed on the rotor blade 164 are aligned. With the help of two screws 178 and 180 the wear protection 172 attached to the rotor blade 164.
  • the course corresponds wear protection 172 the arcuate course of the rotor blade 164.
  • rotor blades it is also conceivable for rotor blades to be provided on the rotor, which are S-shaped or crescent-shaped.
  • rotors have been used for paper preparation machines described that to circulate the stock suspension are only provided with rotor blades that are in one common level are arranged. It is also conceivable to use rotors to use the rotor blades arranged in different levels have, or on the base body additionally a preferably conical Screw coil is attached, the screw axis with the Rotation axis of the rotor coincides and with which the flow behavior the stock suspension in the container of the stock preparation machine can be influenced.

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  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Crushing And Pulverization Processes (AREA)

Description

Die Erfindung betrifft einen Rotor für eine Papierstoffaufbereitungsmaschine, der in einem Behälter der Papierstoffaufbereitungsmaschine angeordnet ist und mehrere Rotorblätter zum Umwälzen einer in dem Behälter enthaltenen Stoffsuspension und zum Zerkleinern von in der Stoffsuspension enthaltenem Papiermaterial aufweist, wobei an einer in Rotationsrichtung des Rotors gesehen führenden Vorderfläche jedes Rotorblattes ein Verschleißschutz lösbar befestigt ist. Ferner betrifft die Erfindung einen Verschleißschutz nach dem Oberbegriff des Anspruches 6 zum Schutz eines Rotorblattes an einem Rotor einer Papierstoffaufbereitungsmaschine.The invention relates to a rotor for a stock preparation machine, which is arranged in a container of the stock preparation machine and a plurality of rotor blades for circulating one in the container contained stock suspension and for crushing in the stock suspension Contained paper material, with one in the direction of rotation seen from the rotor leading front surface of each rotor blade wear protection is releasably attached. The invention further relates to a Wear protection according to the preamble of claim 6 for the protection of a Rotor blade on a rotor of a stock preparation machine.

Es ist ein Rotor für eine Papierstoffaufbereitungsmaschine bekannt, bei dem an der in Rotationsrichtung des Rotors gesehen führenden Vorderfläche jedes Rotorblattes durch Aufschweißen verschleißfesten Materials ein Verschleißschutz aufgebracht ist. It is a rotor for a stock preparation machine known, at which in the direction of rotation seen from the rotor leading front surface of each rotor blade wear protection by welding wear-resistant material is applied.

Die WO 98/49 389 beschreibt einen Pulper mit einem in einem Behälter drehbar antreibbaren Rotor. Der Rotor weist eine Schraubenwendel zum Umwälzen der Stoffsuspension im Behälter auf, wobei an der Unterseite der Schraubenwendel mit gleichem Abstand zueinander mehrere radial nach außen abstehende Rotorblätter angeformt sind. An der in Rotationsrichtung des Rotors gesehen führenden Vorderfläche jedes Rotorblattes ist ein Verschleißschutz lösbar befestigt.WO 98/49 389 describes a pulper with one in a container rotatably drivable rotor. The rotor has a helical screw Circulating the stock suspension in the container, taking on the bottom the helix with the same distance from each other several radially rotor blades projecting outwards are formed. On the in the direction of rotation seen from the rotor leading front surface of each rotor blade wear protection releasably attached.

Aus der GB 5018 A.D.1914 ist ein Rotor für eine Papierstoffaufbereitungsmaschine bekannt, der zwei bzw. drei radial nach außen abstehende Rotorblätter aufweist. An dem freien Ende jedes Rotorblattes ist ein Verschleißschutz aus einem verschleißfesten Material durch Schrauben, Nieten, Zapfen oder ähnliches lösbar befestigt.From GB 5018 A.D. 1914 is a rotor for a stock preparation machine known, the two or three radially outwardly projecting rotor blades having. Wear protection is provided at the free end of each rotor blade made of a wear-resistant material by screws, rivets, Pin or the like releasably attached.

Die BE 1 010 118 beschreibt gleichfalls einen für eine Papierstoffaufbereitungsmaschine verwendbaren Rotor mit mehreren Rotorblättern, die jeweils einen bogenförmigen Verlauf mit in Richtung des jeweiligen freien Endes abnehmenden Querschnitts besitzen, wobei an jedem Rotorblatt ein bogenförmig verlaufender Verschleißschutz lösbar befestigt ist.BE 1 010 118 also describes one for a stock preparation machine usable rotor with multiple blades that each with an arcuate course in the direction of the respective free End of decreasing cross-section, with one on each rotor blade arcuate wear protection is releasably attached.

Aus der EP 328 500 A2 ist ein Rotor für eine Papierstoffaufbereitungsmaschine bekannt, an dessen radial nach außen von seiner Nabe abstehenden Rotorblättern jeweils ein Verschleißschutz lösbar befestigt ist, wobei an der in Rotationsrichtung gesehen führenden Vorderfläche jedes Verschleißschutzes Formelemente ausgebildet sind. EP 328 500 A2 describes a rotor for a stock preparation machine known, on the radially outwardly projecting from its hub Each rotor blade is attached to a wear protection, whereby on the front surface of each wear protection, as seen in the direction of rotation Form elements are formed.

Es ist Aufgabe der Erfindung, einen Rotor für eine Papierstoffaufbereitungsmaschine bzw. einen Verschleißschutz zum Schutz von Rotorblättern anzugeben, bei dem bzw. durch dessen Verwendung das Rotorblatt über einen vergleichsweise langen Zeitraum vor Verschleiß geschützt ist.It is an object of the invention to provide a rotor for a stock preparation machine or wear protection to protect rotor blades specify the rotor blade in or by its use is protected against wear over a comparatively long period of time.

Diese Aufgabe wird durch einen Rotor mit den Merkmalen nach Anspruch 1 gelöst. Ferner wird die Aufgabe durch einen Verschleißschutz für einen Rotor einer Papierstoffaufbereitungsmaschine mit den Merkmalen nach Anspruch 6 gelöst. This object is achieved by a rotor with the features of claim 1 solved. Furthermore, the task is by wear protection for one Rotor of a paper preparation machine with the features according to Claim 6 solved.

Bei der Erfindung kann, sobald die Rotorblätter des Rotors nicht mehr in ausreichendem Maße die Stoffsuspension im Behälter umwälzen oder das in der Stoffsuspension enthaltene Papiermaterial nicht mehr ausreichend zerkleinert wird, der an jedem Rotorblatt befestigte Verschleißschutz auf einfache Weise ausgebaut und durch einen neuwertigen Verschleißschutz ersetzt werden. Dadurch kann auf die derzeit üblichen aufwendigen Schweißarbeiten an den Rotorblättern verzichtet werden, durch die das Werkstoffgefüge der Rotorblätter nachteilig beeinflußt wird. Ferner sind die Kanten am Verschleißschutz bereits vor dem Einbau entsprechend vorbearbeitet, so daß ein zeitaufwendiges Zuschleifen der Kanten am Rotor entfällt. Des weiteren ist es möglich, durch Verwendung eines entsprechend gestalteten Verschleißschutzes gezielt die hydraulische Wirkung des Rotorblattes zu beeinflussen, um beispielsweise die Strömungsbewegungen innerhalb der Stoffsuspension zu verändern oder die Zerkleinerungswirkung des Rotors zu verstärken bzw. zu verringern. Auf diese Weise ist es möglich, die Papierstoffaufbereitungsmaschine ohne großen Aufwand an unterschiedliche Betriebsbedingungen anzupassen, ohne daß ein Austauschen von Rotoren mit unterschiedlich gestalteten Rotorblättern erforderlich ist. In the invention, as soon as the rotor blades of the rotor are no longer in sufficiently circulate the stock suspension in the container or that Paper material contained in the stock suspension is no longer sufficient is shredded, the wear protection attached to each rotor blade easily expanded and with a new wear protection be replaced. This can be expensive on the currently usual Welding work on the rotor blades can be dispensed with, through which the Material structure of the rotor blades is adversely affected. Furthermore are the edges on the wear protection accordingly before installation pre-processed so that a time-consuming grinding of the edges on the rotor eliminated. Furthermore, it is possible to use one accordingly designed wear protection specifically the hydraulic effect of the To influence the rotor blade, for example the flow movements change within the stock suspension or the crushing effect to increase or decrease the rotor. That way it is possible to use the stock preparation machine with little effort to adapt to different operating conditions without a Replacing rotors with differently designed rotor blades is required.

Da der Verschleißschutz mit seinen Seitenkanten zumindest teilweise über die die Vorderfläche des Rotorblattes begrenzende Kontur hinausragt, sind insbesondere die Kanten des Rotorblattes durch den Verschleißschutz geschützt, so daß die Rotorblätter durch die Verwendung des erfindungsgemäß gestalteten Verschleißschutzes verglichen mit den in herkömmlicherweise vor Verschleiß geschützten Rotorblättern über einen längeren Zeitraum einsatzbereit sind. Because the wear protection with its side edges at least partially extends beyond the contour delimiting the front surface of the rotor blade, are the edges of the rotor blade due to the wear protection protected so that the rotor blades through the use the wear protection designed according to the invention compared to that in conventionally protected against wear rotor blades over a are ready for use for a longer period of time.

Vorteilhafte Weiterbildungen der Erfindung sind in der Beschreibung, den Zeichnungen sowie den Unteransprüchen angegeben.Advantageous developments of the invention are in the description, the Drawings and the subclaims specified.

So wird bei einer bevorzugten Ausführungsform des Rotors vorgeschlagen, zumindest einen Teilabschnitt der Vorderfläche des jeweiligen Rotorblattes, der vom freien Ende des Rotorblattes ausgeht, vollständig mit dem Verschleißschutz zu bedecken. Dadurch wird sichergestellt, daß insbesondere der vom freien Ende des Rotorblattes ausgehende Teilabschnit des Rotorblattes, der, verglichen mit den Abschnitten geringeren radialen Abstandes zur Rotationsachse des Rotors, aufgrund der höheren Umfangsgeschwindigkeit entsprechend höheren Belastungen ausgesetzt ist, ausreichend vor Verschleiß geschützt wird.In a preferred embodiment of the rotor, it is proposed that at least a portion of the front surface of the respective rotor blade, that starts from the free end of the rotor blade, completely with the Cover wear protection. This ensures that in particular the partial section starting from the free end of the rotor blade of the rotor blade, which is smaller compared to the radial sections Distance to the axis of rotation of the rotor due to the higher peripheral speed is exposed to correspondingly higher loads, is adequately protected against wear.

Zum Befestigen des Verschleißschutzes wird vorzugsweise eine betriebssichere Schraubenverbindung eingesetzt. Zu diesem Zweck ist bei einer bevorzugten Ausführungsform des Verschleißschutzes an dessen der Vorderfläche des Rotorblattes zugewandten Rückseite mindestens ein Schraubenbolzen vorgesehen, der am Rotorblatt durch eine vorzugsweise selbsthemmende Mutter verschraubbar ist. Durch Verwendung einer Schraubverbindung ist ein sehr schneller und einfacher Austausch des Verschleißschutzes möglich. Zusätzlich kann an der Rückseite des Verschleißschutzes ein Zentrierstift oder eine Paßfeder vorgesehen sein, der bzw. die in einer am Rotorblatt ausgebildeten Bohrung bzw. Nut aufgenommen wird, wodurch die während des Betriebes am Verschleißschutz anreifenden Radial-, Schub- und/oder Scherkräfte aufgenommen werden. To attach the wear protection is preferably a reliable Screw connection used. For this purpose, one is preferred Embodiment of wear protection on the front surface of the rotor blade facing back at least one Bolt provided, which is preferably on the rotor blade by a self-locking nut can be screwed. By using a Screw connection is a very quick and easy exchange of the Wear protection possible. Additionally, wear protection can be found on the back a centering pin or a key may be provided, the or received in a bore or groove formed on the rotor blade is what the wear protection during operation attacking radial, shear and / or shear forces are absorbed.

Alternativ kann der Zentrierstift auch am Rotorblatt befestigt und in einer Bohrung am Verschlußschutz aufgenommen sein.Alternatively, the centering pin can also be attached to the rotor blade and in one Drill hole on the lock protection must be included.

Des weiteren wird vorgeschlagen, an zumindest einer der Seitenkanten des Verschleißschutzes mehrere Aussparungen auszubilden, mit denen die Umwälzbewegungen in der Stoffsuspension während der Rotation des Rotors gezielt beeinflußt werden können.It is also proposed that at least one of the side edges of the wear protection to form several recesses with which the circulating movements in the stock suspension during the rotation of the Rotors can be influenced in a targeted manner.

Nachfolgend wird die Erfindung anhand von vier Ausführungsbeispielen unter Bezugnahme auf die Zeichnungen näher erläutert. Darin zeigen:

Fig. 1
eine Draufsicht auf ein erstes Ausführungsbeispiel eines Rotors für eine Papierstoffaufbereitungsmaschine, bei dem an jedem Rotorblatt ein Verschleißschutz vorgesehen ist;
Fig. 2
eine Seitenansicht des Rotors nach Fig. 1 in teilweise geschnittener Darstellung;
Fig. 3
einen Ausschnitt auf eine Draufsicht eines zweiten Ausführungsbeispieles eines Rotors;
Fig. 4
eine Schnittansicht eines Rotorblattes des Rotors nach Fig. 3 entlang der Schnittlinie A-A in Fig. 3 mit daran befestigtem Verschleißschutz;
Fig. 5
einen Ausschnitt auf eine Draufsicht eines dritten Ausführungsbeispieles eines Rotors;
Fig. 6
eine Schnittansicht eines Rotorblattes des Rotors nach Fig. 5 entlang der Schnittlinie B-B in Fig. 5 mit daran befestigtem Verschleißschutz;
Fig. 7
eine Seitenansicht des Rotorblattes nach Fig. 6; und
Fig. 8
eine perspektivische Darstellung eines vierten Ausführungsbeispieles eines Rotors für eine Papierstoffaufbereitungsmaschine.
The invention is explained in more detail below using four exemplary embodiments with reference to the drawings. In it show:
Fig. 1
a plan view of a first embodiment of a rotor for a stock preparation machine, in which wear protection is provided on each rotor blade;
Fig. 2
a side view of the rotor of Figure 1 in a partially sectioned representation.
Fig. 3
a detail of a plan view of a second embodiment of a rotor;
Fig. 4
a sectional view of a rotor blade of the rotor of Figure 3 along the section line AA in Figure 3 with attached wear protection.
Fig. 5
a detail of a plan view of a third embodiment of a rotor;
Fig. 6
a sectional view of a rotor blade of the rotor of Figure 5 along the section line BB in Figure 5 with attached wear protection.
Fig. 7
a side view of the rotor blade of FIG. 6; and
Fig. 8
a perspective view of a fourth embodiment of a rotor for a stock preparation machine.

Fig. 1 zeigt in Draufsicht ein erstes Ausführungsbeispiel eines Rotors 10 für eine Papierstoffaufbereitungsmaschine (nicht dargestellt), wie beispielsweise einen Stoffauflöser, einen Pulper, ein Fiberizer oder ähnliches. Der Rotor 10 weist einen rotationssymmetrischen Grundkörper 12 auf, der durch eine entsprechend gestaltete Wellen-Naben-Verbindung mit der Antriebswelle eines elektrischen Antriebes (nicht dargestellt) der Papierstoffaufbereitungsmaschine verbunden ist. Der Rotor 10 ist innerhalb eines Behälters (nicht dargestellt) der Papierstoffaufbereitungsmaschine angeordnet.1 shows a top view of a first exemplary embodiment of a rotor 10 for a stock preparation machine (not shown), such as a pulper, a pulper, a fiberizer or the like. The rotor 10 has a rotationally symmetrical base body 12, by a correspondingly designed shaft-hub connection with the Drive shaft of an electric drive (not shown) of the stock preparation machine connected is. The rotor 10 is within one Container (not shown) of the stock preparation machine.

Am Grundkörper 12 sind gleichmäßig über dessen Umfang verteilt insgesamt acht identisch ausgebildete Rotorblätter 14 befestigt. Jedes Rotorblatt 14 ist als Platte ausgebildet und hat die Form eines ungleichschenkligen Trapezes. Wie Fig. 2 zeigt, ist das Rotorblatt 14 dabei so am Grundkörper 12 befestigt, daß es mit seiner Flachseite in einer parallel zur Rotationsachse des Rotors 10 verlaufenden Ebene angeordnet ist und in tangentialer Richtung zum Grundkörper 12 verlaufend, mit seiner längeren der beiden parallel zueinander verlaufenden Seitenkanten am Grundkörper verschweißt ist. Zwischen jeweils benachbarten Rotorblättern 14 ist eine etwa dreieckförmige Stützplatte 16 vorgesehen, die in einer lotrecht zur Rotationsachse des Rotors 10 verlaufenden Ebene angeordnet ist. Die Stützplatte 16 ist mit einer ihrer Seitenkanten an der in Rotationsrichtung 18 des Rotors 10 gesehen (in Fig. 1 entgegen dem Uhrzeigersinn) führenden Vorderfläche 20 des jeweils nachfolgenden Rotorblattes 14 sowie der Mantelfläche des Grundkörpers 12 verschweißt. Die Stützplatte 16 ist dabei so angeordnet, daß sie mit ihrer längsten Seitenkante an der in Rotationsrichtung 18 gesehen nachfolgenden rückwärtigen Fläche 22 des vorgeordneten Rotorblattes 14 anliegt und das Rotorblatt 14 stützt.On the base body 12 are distributed evenly over its circumference as a whole eight identically designed rotor blades 14 attached. Every rotor blade 14 is designed as a plate and has the shape of an unequal leg Trapezium. As shown in FIG. 2, the rotor blade 14 is on the base body 12 attached that it with its flat side in a parallel to the axis of rotation of the rotor 10 extending plane is arranged and in tangential Running towards the base body 12, with its longer one of the two parallel side edges on the base body is welded. Is between adjacent rotor blades 14 an approximately triangular support plate 16 is provided, which in a perpendicular is arranged to the axis of rotation of the rotor 10 extending plane. The Support plate 16 is with one of its side edges on the in the direction of rotation 18 of the rotor 10 seen (counterclockwise in Fig. 1) leading Front surface 20 of the subsequent rotor blade 14 and the Shell surface of the base body 12 welded. The support plate 16 is there arranged so that with its longest side edge on the in the direction of rotation 18 seen subsequent rear surface 22 of the upstream Rotor blade 14 rests and supports the rotor blade 14.

An jedem Rotorblatt 14 sind insgesamt drei Durchgangsbohrungen 24, 26 und 28 ausgebildet, die zwischen der Vorderfläche 20 und der rückwärtigen Fläche 22 des Rotorblattes 14 verlaufen. Wie Fig. 2 zeigt, sind die Durchgangsbohrungen 24, 26 und 28 gleichmäßig zueinander beabstandet, wobei die Symmetrieachsen der beiden Durchgangsbohrungen 24 und 26 mit geringerem radialen Abstand zum Grundkörper 12 in einer gemeinsamen lotrecht zur Rotationsachse des Rotors 10 verlaufenden Ebene angeordnet sind. Die dritte Durchgangsbohrung 28 nahe dem freien Ende 30 des Rotorblattes 14 ist versetzt zu dieser Symmetrieebene, mittig zwischen einer oberen Seitenkante 32 und einer unteren Seitenkante 34 des Rotorblattes 14 angeordnet, wie Fig. 2 zeigt. Jeder Durchgangsbohrung 24, 26 und 28 ist ferner eine Hülse 36, 38 bzw. 40 zugeordnet, die an der rückwärtigen Fläche 22 des Rotorblattes 14 verschweißt ist und mit ihrer Durchgangsöffnung zur jeweiligen Durchgangsbohrung 24, 26 bzw. 28 fluchtet. There are a total of three through bores 24, 26 on each rotor blade 14 and 28 formed between the front surface 20 and the rear surface Surface 22 of the rotor blade 14 run. As shown in Fig. 2, the Through holes 24, 26 and 28 evenly spaced from each other, the axes of symmetry of the two through holes 24 and 26 with a smaller radial distance to the base body 12 in a common plane perpendicular to the axis of rotation of the rotor 10 are arranged. The third through hole 28 near the free end 30 of the rotor blade 14 is offset from this plane of symmetry, in the middle between an upper side edge 32 and a lower side edge 34 of the Rotor blade 14 arranged as shown in FIG. 2. Any through hole 24, 26 and 28 is also assigned a sleeve 36, 38 and 40, respectively, on the rear surface 22 of the rotor blade 14 is welded and with it Through opening to the respective through hole 24, 26 or 28 flees.

An der Vorderfläche 20 jedes Rotorblattes 14 ist ein Verschleißschutz 42 aus einem besonders verschleißfesten Werkstoff, vorzugsweise einem nichtrostenden, legierten Edelstahl, wie beispielsweise einem Chrom-Nickel-Molybdän-Stahl, befestigt. Wie Fig. 2 zeigt, entspricht die Form des Verschleißschutzes 42 in etwa der Form des Rotorblattes 14, wobei der Verschleißschutz 42 so bemessen ist, daß er über das freie Ende 30 und die beiden Seitenkanten 32 und 34 des jeweiligen Rotorblattes 14 hinausragt. An der der Vorderfläche 20 des Rotorblattes 14 abgewandten Vorderseite 44 des Verschleißschutzes 42 ist ein in die Seitenkanten des Verschleißschutzes 42 teilweise übergehender, erhabener Rand 46 ausgebildet, der in Fig. 2 durch eine Kreuzschraffur angedeutet ist. Wie in Fig. 1 dargestellt, ist der erhabene Rand 46 mit einer Fase versehen, so daß der Verschleißschutz 42 an seinen Seitenkanten abgeschrägt ist.Wear protection 42 is provided on the front surface 20 of each rotor blade 14 made of a particularly wear-resistant material, preferably one stainless, alloyed stainless steel, such as a chrome-nickel-molybdenum steel, attached. 2 shows, the shape of the Wear protection 42 in approximately the shape of the rotor blade 14, the Wear protection 42 is dimensioned so that it over the free end 30 and the two side edges 32 and 34 of the respective rotor blade 14 protrude. On the front surface facing away from the front surface 20 of the rotor blade 14 44 of the wear protection 42 is one in the side edges of the wear protection 42 partially merging, raised edge 46 formed, which is indicated in Fig. 2 by cross hatching. As in Fig. 1 shown, the raised edge 46 is provided with a chamfer so that the Wear protection 42 is chamfered on its side edges.

Von der der Vorderfläche 20 des Rotorblattes 14 zugewandten Rückseite 48 jedes Verschleißschutzes 42 stehen drei Schraubenbolzen 50, 52 und 54 ab, von denen jeder in einer am Verschleißschutz 42 ausgebildeten Bohrung aufgenommen und in dieser verschweißt ist. Jeder Schraubenbolzen 50, 52 bzw. 54 des Verschleißschutzes 42 ragt durch eine der Durchgangsbohrungen 24, 26 bzw. 28 sowie die dieser zugeordneten Hülse 36, 38 bzw. 40. An dem aus der Hülse 36, 38 bzw. 40 hervorstehenden Schraubenbolzen 50, 52, bzw. 54 ist eine Mutter 56, 58 bzw. 60 verschraubt, mit der der Verschleißschutz 42 lösbar am jeweiligen Rotorblatt 14 befestigt ist. Um ein Lösen der Muttern 56, 58 bzw. 60 während der Rotation des Rotors 10 zu vermeiden, werden im vorliegenden Fall selbsthemmende Muttern verwendet. Anstelle selbsthemmender Muttern können auch andere Sicherungen verwendet werden, die ein Lösen der Schraubverbindungen verhindern. So eignen sich beispielsweise Federringe, Sicherungsbleche mit Lappen, die umgebogen werden, oder Kronenmuttern, die durch Splinte gesichert sind.From the rear face facing the front surface 20 of the rotor blade 14 48 of each wear protection 42 are three bolts 50, 52 and 54, each of which is designed in a wear protection 42 Bore recorded and welded in this. Each bolt 50, 52 and 54 of the wear protection 42 protrudes through one of the Through bores 24, 26 and 28 and the sleeve assigned to them 36, 38 or 40. On the protruding from the sleeve 36, 38 or 40 Bolt 50, 52 or 54 is a nut 56, 58 or 60 screwed, with the wear protection 42 releasably on the respective rotor blade 14 is attached. To loosen the nuts 56, 58 and 60 during the To avoid rotation of the rotor 10 are in the present case self-locking nuts used. Instead of self-locking nuts other fuses can also be used that prevent the Prevent screw connections. For example, spring washers are suitable Tab washers with rags that are bent over or crown nuts, which are secured by split pins.

Zum Durchmischen der Stoffsuspension im Behälter der Papierstoffaufbereitungsmaschine wird der Rotor 10 mit Hilfe des elektrischen Antriebes in Drehung versetzt. Dabei erzeugen die Rotorblätter 14 mit den daran befestigten Verschleißschutzen 42 sowohl in Richtung der Rotationsachse des Rotors 10 als auch in radialer Richtung bezüglich der Rotationsachse der Rotors 10 Strömungsbewegungen, durch die die Stoffsuspension durchmischt wird. Eventuell in der Stoffsuspension enthaltenes Papiermaterial oder auch in die Stoffsuspension eingeworfene Papierballen werden gleichzeitig von den an jedem Verschleißschutz 42 ausgebildeten Kanten zerkleinert. Durch die feinverteilten Fasern in der Stoffsuspension sind die Verschleißschutze 42 hohem Verschleiß ausgesetzt, wobei die Kanten jedes Verschleißschutzes 42 nach und nach abgerundet werden. Dadurch nimmt sowohl die Umwälzwirkung als auch die Zerkleinerungswirkung des Rotors 10 ab, so daß ab einem gewissen Zeitpunkt ein Austausch der Verschleißschutze 42 notwendig wird. Zu diesem Zweck wird der Rotor 10 angehalten, der Behälter entleert und die alten Verschleißschutze 42 durch Lösen der Muttern 56, 58 und 60 von den Rotorblättern 14 gelöst und durch neue Verschleißschutze 42 ersetzt, die anschließend wieder mit den Rotorblättern 14 verschraubt werden.For mixing the stock suspension in the container of the stock preparation machine the rotor 10 with the help of the electric drive spun. The rotor blades 14 produce with them attached wear protection 42 both in the direction of the axis of rotation of the rotor 10 and in the radial direction with respect to the axis of rotation the rotor 10 flow movements through which the stock suspension is mixed. Any paper material contained in the stock suspension or even bales of paper thrown into the stock suspension at the same time from those formed on each wear protection 42 Edges crushed. Due to the finely divided fibers in the stock suspension the wear protection 42 are exposed to high wear, the Edges of each wear protection 42 are gradually rounded off. As a result, both the circulation effect and the crushing effect decrease of the rotor 10, so that at some point an exchange wear protection 42 becomes necessary. For this purpose the rotor 10 stopped, the container emptied and the old wear protectors 42 by loosening the nuts 56, 58 and 60 from the rotor blades 14 solved and replaced by new wear protection 42, which then are screwed back to the rotor blades 14.

In den Fig. 3 und 4 ist ein zweites Ausführungsbeispiel eines Rotors 70 dargestellt. Bei diesem zweiten Ausführungsbeispiel wird der Rotor 70 in einer Papierstoffaufbereitungsmaschine (nicht dargestellt) eingesetzt, deren Behälter (nicht dargestellt) ein Sieb (nicht dargestellt) aufweist, durch das die Stoffsuspension aus dem Behälter strömt. Der Rotor 70 ist in unmittelbarer Nähe des Siebes angeordnet und hat neben seiner üblichen Funktion die Stoffsuspension im Behälter umzuwälzen und mitschwimmende Papierbestandteile zu zerkleinern, zusätzlich die Funktion eines Räumers und soll das Sieb von Verstopfungen freihalten.3 and 4 is a second embodiment of a rotor 70 shown. In this second embodiment, the rotor 70 in a stock preparation machine (not shown) used, the Containers (not shown) has a sieve (not shown) through that the stock suspension flows out of the container. The rotor 70 is in the immediate vicinity Arranged near the sieve and has next to its usual Function to circulate the stock suspension in the tank and floating Shred paper components, also the function of a Räumers and should keep the sieve free of blockages.

Der Rotor 70, von dem in Fig. 3 nur ein Ausschnitt dargestellt ist, weist einen rotationssymmetrischen Grundkörper 72 auf, der drehfest mit der Welle eines elektrischen Antriebes (nicht dargestellt) verbunden ist. Am Umfang des Grundkörpers 72 sind mehrere gleichmäßig zueinander beabstandete Rotorblätter 74 befestigt. Jedes Rotorblatt 74 hat einen Befestigungsabschnitt 76 (vgl. Fig. 4), mit dem es am Grundkörper 72 beispielsweise durch Schrauben befestigt ist. Der Befestigungsabschnitt 76 geht in einen Rotorblattabschnitt 78 über, der in einer etwa lotrecht zur Rotationsachse des Rotors 70 verlaufenden Ebene liegt und eine etwa dreieckige Form aufweist, dessen in Fig. 3 links dargestelltes freies Ende 80 stumpf ausläuft.The rotor 70, of which only a section is shown in FIG. 3, has a rotationally symmetrical base body 72 which rotatably with the An electric drive shaft (not shown) is connected. At the The circumference of the base body 72 is a plurality which are evenly spaced from one another Rotor blades 74 attached. Each rotor blade 74 has an attachment portion 76 (cf. FIG. 4) with which it is, for example, on the base body 72 is attached by screws. The attachment portion 76 goes in a rotor blade section 78 which is approximately perpendicular to the axis of rotation of the rotor 70 extending plane and an approximately triangular Has shape, the free end 80 shown in Fig. 3 blunt expires.

Der Rotorblattabschnitt 78 ist so relativ zum Grundkörper 72 angeordnet, daß eine in Rotationsrichtung 82 des Rotors 70 gesehen, nachfolgende rückwärtige Fläche 84 des Rotorblattes 74 bezogen auf die Rotationsachse des Rotors 70 radial verläuft, während eine in Rotationsrichtung 82 des Rotors 70 gesehen führende Vorderfläche 86 des Rotorblattes 74 schräg bezüglich des Grundköpers 72 verläuft.The rotor blade section 78 is arranged relative to the base body 72, that seen in the direction of rotation 82 of the rotor 70, subsequent rear surface 84 of the rotor blade 74 with respect to the axis of rotation of the rotor 70 runs radially, while one in the direction of rotation 82 of the Rotor 70 seen leading front surface 86 of the rotor blade 74 obliquely runs with respect to the base body 72.

In der Vorderfläche 86 sind mit gleichem Abstand zueinander drei Bohrungen 88, 90 und 92 ausgebildet, die rechtwinklig zur rückwärtigen Fläche 84 des Rotorblattes 74 verlaufen. Dabei sind die beiden Bohrungen 88 und 90 mit geringerem radialen Abstand zur Rotationsachse des Rotors 70 als Sacklöcher ausgebildet, während die am entferntesten zur Rotationsachse des Rotors 70 ausgebildete Bohrung 92 als Durchgangsbohrung ausgebildet ist und an der rückwärtigen Fläche 84 des Rotorblattes 74 in einer Ausnehmung 94 endet.In the front surface 86 there are three holes at the same distance from one another 88, 90 and 92 formed, which are perpendicular to the rear surface 84 of the rotor blade 74 extend. The two bores are 88 and 90 with a smaller radial distance from the axis of rotation of the rotor 70 formed as blind holes, while the farthest from the axis of rotation of the rotor 70 formed bore 92 as a through bore is formed and on the rear surface 84 of the rotor blade 74 in a recess 94 ends.

Wie Fig. 4 weiter zeigt, weist der Rotorblattabschnitt 78 eine im wesentlichen rechteckige Querschnittsform auf und geht in Richtung seines freien Endes 80 in einen Endabschnitt 96 über, dessen Querschnitt kontinuierlich zunimmt und der in Richtung der dem Behälterboden zugewandten Unterseite des Rotorblattes 74 abgeschrägt verläuft, wobei der radiale Abstand der Stirnseite des freien Endes 80 bezüglich der Rotationsachse kontinuierlich abnimmt.As FIG. 4 further shows, the rotor blade section 78 essentially has a rectangular cross-sectional shape and goes towards its free End 80 into an end section 96, the cross section of which is continuous increases and towards the bottom of the container Underside of the rotor blade 74 runs beveled, the radial distance the face of the free end 80 with respect to the axis of rotation decreases continuously.

An der Vorderfläche 86 des Rotorblattes 74 ist ein plattenförmiger Verschleißschutz 98 befestigt, dessen Kontur im wesentlichen der Querschnittsform des Rotorblattabschnittes 78 und des Endabschnittes 96 des Rotorblattes 74 entspricht. Der Verschleißschutz 98 ist so bemessen, daß er mit seiner Kontur über die die Vorderfläche 86 des Rotorblattes 74 begrenzende Kontur hinausragt, wobei seine Stirnseite parallel zur Stirnseite des Endabschnittes 96 verläuft (vgl. Fig. 3).A plate-shaped wear protection is on the front surface 86 of the rotor blade 74 98 attached, the contour of which is essentially the cross-sectional shape of the rotor blade section 78 and the end section 96 of the Rotor blade 74 corresponds. Wear protection 98 is dimensioned such that it with its contour over the front surface 86 of the rotor blade 74 delimiting Contour protrudes, with its face parallel to the face of the end section 96 runs (see FIG. 3).

Zum Befestigen des Verschleißschutzes 98 an der Vorderfläche 86 des Rotorblattes 74 stehen von der der Vorderfläche 86 zugewandten Rückseite 100 des Verschleißschutzes 98 zwei Zapfen 102 und 104 sowie ein Schraubenbolzen 106 ab. Die Zapfen 102 und 104 sowie der Schraubenbolzen 106 sind in am Verschlußschutz 98 ausgebildete Bohrungen aufgenommen und in diesen verschweißt. Wie Fig. 3 zeigt, verlaufen die beiden Zapfen 102 und 104 sowie der Schraubenbolzen 106 geneigt zur Rückseite 100 des Verschleißschutzes 98. Der Neigungswinkel der Zapfen 102 und 104 sowie des Schraubenbolzens 106 bezüglich der Rückseite 100 entspricht dem Winkel, mit dem die Vorderfläche 86 des Rotorblattes 74 bezüglich der rückwärtigen Fläche 84 des Rotorblattes 74 verläuft.To attach the wear protection 98 to the front surface 86 of the The rotor blade 74 stands from the rear face facing the front face 86 100 of wear protection 98 two pins 102 and 104 and one Bolt 106 off. Pins 102 and 104 and the bolt 106 are received in bores formed on the lock protection 98 and welded into it. 3 shows, the two run Pins 102 and 104 and the bolt 106 inclined to Back 100 of wear protection 98. The angle of inclination of the pins 102 and 104 and the bolt 106 with respect to the rear 100 corresponds to the angle at which the front surface 86 of the rotor blade 74 extends with respect to the rear surface 84 of the rotor blade 74.

Die beiden Zapfen 102 und 104 sind in den Sacklöchern 88 und 90 aufgenommen. Der Schraubenbolzen 106 ragt durch die Durchgangsbohrung 92 in die Ausnehmung 94. Auf den in die Ausnehmung 94 ragenden Abschnitt des Schraubenbolzens 106 ist eine Mutter 108 aufgeschraubt. Im vorliegenden Fall wird als Mutter 108 eine selbsthemmende Mutter verwendet, um ein Lösen der Schraubverbindung zu verhindern. Auch in diesem Fall kann anstelle einer selbsthemmenden Mutter eine der oben beschriebenen Sicherungen für Schraubverbindungen verwendet werden.The two pins 102 and 104 are received in the blind holes 88 and 90. The bolt 106 protrudes through the through hole 92 into the recess 94. On the section projecting into the recess 94 of the bolt 106, a nut 108 is screwed on. in the In the present case, a self-locking nut is used as nut 108, to prevent loosening of the screw connection. Also in this Fall can be one of the above instead of a self-locking nut Fuses for screw connections are used.

Wie beim ersten Ausführungsbeispiel wird der Rotor 70 zum Umwälzen der im Behälter der Papierstoffaufbereitungsmaschine enthaltenen Stoffsuspension verwendet. Dabei verhindert der aus einem besonders verschleißfesten Material gefertigte Verschleißschutz 98, daß die Vorderfläche 86 des Rotorblattes 74 durch die Partikel in der Stoffsuspension nach und nach abgetragen wird. Sobald der Verschleißschutz 98 nicht mehr die erwünschte Umwälzbewegung sowie das Zerkleinern der in der Stoffsuspension enthaltenen Papiermaterialien und das Freihalten des Siebes des Behälters gewährleistet, wird der Verschleißschutz 98 ausgetauscht. Zu diesem Zweck muß bei stehendem Rotor 70 nur die Mutter 108 des jeweiligen Verschleißschutzes 98 gelöst, der alte Verschleißschutz 98 entfernt und durch einen neuen Verschleißschutz ersetzt werden, der anschließend wieder mit Hilfe der Mutter 108 fest mit dem Rotorblatt 74 verbunden wird. As in the first embodiment, the rotor 70 becomes circulating the stock suspension contained in the stock of the stock preparation machine used. This prevents from a particularly wear-resistant Material made wear protection 98 that the front surface 86 of the rotor blade 74 by and through the particles in the stock suspension after is removed. As soon as the wear protection 98 is no longer the desired one Circulation and crushing in the stock suspension contained paper materials and keeping the strainer of the container clear guaranteed, the wear protection 98 is replaced. To this Purpose when the rotor 70 is stationary, only the nut 108 of the respective Wear protection 98 released, the old wear protection 98 removed and be replaced by a new wear protection, which then again firmly connected to the rotor blade 74 with the aid of the nut 108 becomes.

Die Fig. 5 bis 7 zeigen ein drittes Ausführungsbeispiel eines Rotors 110 für eine Papierstoffaufbereitungsmaschine. Der Aufbau des Rotors 110 entspricht im wesentlichen dem Aufbau des im zweiten Ausführungsbeispiel beschriebenen Rotors 70. Der Rotor 110 unterscheidet sich gegenüber dem Rotor 70 dadurch, daß anstelle zweier Sacklöcher und einer Durchgangsbohrung im Rotorblatt 112 zwei Durchgangsbohrungen 114 und 116 ausgebildet sind, während die dritte Bohrung mit geringstem radialen Abstand zur Rotationsachse des Rotors 110 als Sackloch 118 ausgebildet ist. Die beiden Durchgangsbohrungen 114 und 116 enden jeweils in einer an der rückwärtigen Fläche 120 des Rotorblattes 112 ausgebildeten Ausnehmung 122 bzw. 124.5 to 7 show a third exemplary embodiment of a rotor 110 for a stock preparation machine. The structure of the rotor 110 corresponds essentially to the structure of that in the second embodiment described rotor 70. The rotor 110 differs from the rotor 70 in that instead of two blind holes and one Through hole in the rotor blade 112 two through holes 114 and 116 are formed while the third bore is least radial Distance to the axis of rotation of the rotor 110 is formed as a blind hole 118 is. The two through holes 114 and 116 each end in a formed on the rear surface 120 of the rotor blade 112 Recess 122 or 124.

Ein weiterer Unterschied zwischen den beiden Rotoren 70 und 110 besteht in dem verwendeten Verschleißschutz 126. Der Verschleißschutz 126 des dritten Ausführungsbeispieles hat an seiner Rückseite 128 einen Zapfen 130 sowie zwei Schraubenbolzen 132 und 134, die jeweils in einer Bohrung am Verschleißschutz 126 aufgenommen und in dieser verschweißt sind. Bei am Rotorblatt 112 montiertem Verschleißschutz 126 ist der Zapfen 130 in Sackloch 118 aufgenommen, während die beiden Schraubenbolzen 132 und 134 durch die beiden Durchgangsbohrungen 114 und 116 in die beiden Ausnehmungen 122 und 124 ragen. An dem in die Ausnehmung 122 bzw. 124 ragenden Abschnitt jedes Schraubenbolzens 132 und 134 ist eine selbsthemmende Mutter 136 bzw. 138 verschraubt, die ein Lösen des Verschleißschutzes 126 vom Rotorblatt 112 verhindert. Another difference between the two rotors 70 and 110 is in the wear protection used 126. The wear protection 126 of the third exemplary embodiment has a 128 on its rear side Pin 130 and two bolts 132 and 134, each in one Bore on wear protection 126 added and welded in this are. With wear protection 126 mounted on the rotor blade 112 the pin 130 received in blind hole 118 while the two Bolts 132 and 134 through the two through holes 114 and 116 protrude into the two recesses 122 and 124. On the in the recess 122 and 124 protruding portion of each bolt 132 and 134 a self-locking nut 136 or 138 is screwed, a release of the wear protection 126 from the rotor blade 112 prevented.

Wie Fig. 6 zeigt, ist der Verschleißschutz 126 plattenförmig, wobei seine am freien Ende 140 des Rotorblattes 112 angeordnete Stirnseite 142 entsprechend dem Verlauf des freien Endes 140 des Rotorblattes 112 gestaltet ist und in Richtung der dem Behälterboden zugewandten Unterseite des Rotorblattes 112 so abgeschrägt verläuft, daß der radiale Abstand der Stirnseite 142 des Verschleißschutzes 126 bezüglich der Rotationsachse des Rotors 110 abnimmt. Die Stirnseite 142 des Verschleißschutzes ist ferner so abgeschrägt, daß sie parallel zum freien Ende 140 des Rotorblattes 112 verläuft (vgl. Fig. 5). Wie Fig. 5 weiter zeigt, ragt der Verschleißschutz 126 über die Oberseite 144 des Rotorblattes 112 weit hinaus, wobei das Maß, mit dem der Verschleißschutz 126 über das Rotorblatt 112 hinausragt, in etwa der zweieinhalbfachen Querschnittsabmessung des Rotorblattabschnittes 146 des Rotorblattes 112, parallel zur Rotationsachse des Rotors 110 gesehen, entspricht.As shown in FIG. 6, the wear protection 126 is plate-shaped, with its End face 142 arranged at the free end 140 of the rotor blade 112 accordingly the course of the free end 140 of the rotor blade 112 is and in the direction of the bottom facing the container bottom of the rotor blade 112 is tapered so that the radial distance of the Face 142 of wear protection 126 with respect to the axis of rotation of the rotor 110 decreases. The end face 142 of the wear protection is further bevelled so that they are parallel to the free end 140 of the rotor blade 112 runs (see FIG. 5). 5 further shows, the wear protection protrudes 126 far beyond the top 144 of the rotor blade 112, the degree to which the wear protection 126 over the rotor blade 112 protrudes, approximately two and a half times the cross-sectional dimension of the rotor blade section 146 of the rotor blade 112, parallel to the Rotation axis of the rotor 110 seen corresponds.

Mittig zur mittleren Bohrung 116 ist über dieser ein Stützelement 148 an der Rückseite 128 des Verschleißschutzes 126 verschweißt. Mit Hilfe des im Querschnitt L-förmigen Stützelementes 148 stützt sich der Verschleißschutz 126 zusätzlich an der Oberseite 144 des Rotorblattes 112 ab, wie Fig. 7 zeigt, wodurch die Schraubenverbindungen zwischen den Schraubenbolzen 132 und 134 und den Muttern 136 und 138 entlastet werden. Des weiteren sind an der oberen Kante des Verschleißschutzes 126 mehrere identisch gestaltete Aussparungen 150 mit gleichbleibendem Abstand zueinander ausgebildet. Mit Hilfe der Aussparungen 150 kann die Umwälzbewegung der Stoffsuspension im Behälter der Papierstoffaufbereitungsmaschine beeinfluß werden. Anstelle rechteckig gestalteter Aussparungen können auch Aussparungen in Form von Dreiecken, Vielecken, Halbkreisen, Ovalen oder ähnlichen Gestaltungsformen an der oberen Seitenkante des Verschleißschutzes 126 ausgebildet sein.A support element 148 is centered on the central bore 116 the back 128 of the wear protection 126 welded. With the help of the wear protection is supported in the cross-section L-shaped support element 148 126 additionally on the top 144 of the rotor blade 112, as Fig. 7 shows what the screw connections between the bolts 132 and 134 and the nuts 136 and 138 are relieved. Furthermore, there are several on the upper edge of wear protection 126 Identically designed recesses 150 with a constant distance trained to each other. With the aid of the recesses 150, the circulating movement the stock suspension in the container of the stock preparation machine be influenced. Instead of rectangular cutouts can also have cutouts in the form of triangles, polygons, Semicircles, ovals or similar designs on the top Side edge of the wear protection 126 may be formed.

Auch bei dem in den Fig. 5 bis 7 dargestellten dritten Ausführungsbeispiel kann der Verschleißschutz 126 problemlos innerhalb kürzester Zeit durch Lösen der beiden Muttern 136 und 138 entfernt und durch einen neuen identischen oder anders gestalteten Verschleißschutz ersetzt werden, der anschließend wieder durch die Muttern 136 und 138 am Rotorblatt 112 befestigt wird.Also in the third embodiment shown in FIGS. 5 to 7 wear protection 126 can pass through in no time at all Loosen the two nuts 136 and 138 away and replace with a new one identical or differently designed wear protection are replaced, the then again through the nuts 136 and 138 on the rotor blade 112 is attached.

Fig. 8 zeigt ein viertes Ausführungsbeispiel eines Rotors 160 zur Verwendung in einer Papierstoffaufbereitungsmaschine. Bei diesem Rotor 160 sind am Grundkörper 162 insgesamt neun identisch ausgebildete Rotorblätter 164 gleichmäßig am Umfang des Grundkörpers 162 befestigt. Die Rotorblätter 164 sind mit ihren Flachseiten in einer lotrecht zur Rotationsachse des Rotors 160 verlaufenden Ebene angeordnet. Jedes Rotorblatt 164 hat einen bogenförmigen Verlauf mit in Richtung des jeweiligen freien Endes 166 abnehmenden Querschnitt.8 shows a fourth embodiment of a rotor 160 for use in a stock preparation machine. With this rotor 160 there are a total of nine identically designed rotor blades on the base body 162 164 evenly attached to the circumference of the base body 162. The The flat sides of rotor blades 164 are perpendicular to the axis of rotation of the rotor 160 extending plane. Every rotor blade 164 has an arcuate course with in the direction of the respective free end 166 decreasing cross section.

An der in Rotationsrichtung 168 des Rotors 160 gesehen führenden Vorderfläche 170 jedes Rotorblattes 164 ist ein Verschleißschutz 172 befestigt, der nahezu die gesamte Vorderfläche des jeweiligen Rotorblattes 164 bedeckt. Dabei bildet die in Rotationsrichtung 168 des Rotors 160 gesehen führende Vorderseite 174 jedes Verschleißschutzes 172 eine rechtwinklig zur Rotationsebene des Rotors 160 verlaufende Fläche.On the front surface seen in the direction of rotation 168 of the rotor 160 170 of each rotor blade 164 a wear protection 172 is attached, almost the entire front surface of the respective rotor blade 164 covered. This forms the 160 viewed in the direction of rotation 168 of the rotor leading front 174 of each wear protector 172 a right angle surface extending to the plane of rotation of the rotor 160.

Alternativ ist es auch möglich, die Vorderseite 174 so zu gestalten, daß sie unter einem Winkel geneigt zur Rotationsebene des Rotors 160 verläuft, wodurch je nach Verlauf der Vorderseite 174 während der Drehung des Rotors 160 eine Saugwirkung oder eine Druckwirkung bezüglich des Bodens bzw. des Siebes des Behälters der Papierstoffaufbereitungsmaschine erzeugt wird. Ist die Vorderfläche 174 zum Boden bzw. Sieb des Behälters unter einem spitzen Winkel geneigt, wird die Stoffsuspension vom Boden weggefördert bzw. gesogen. Verläuft die Vorderfläche 174 dagegen unter einem stumpfen Winkel geneigt bezüglich des Bodens bzw. Siebes des Behälters, wird die Stoffsuspension in Richtung des Bodens bzw. Siebes gedrückt.Alternatively, it is also possible to design the front 174 so that it is inclined at an angle to the plane of rotation of the rotor 160, whereby depending on the course of the front 174 during the rotation of the Rotor 160 a suction or a pressure effect on the ground or the sieve of the container of the stock preparation machine is produced. Is the front surface 174 to the bottom or sieve of the container The fabric suspension is inclined at an acute angle from the floor promoted or sucked. In contrast, the front surface 174 runs below an obtuse angle inclined to the bottom or sieve of the container, the stock suspension is pressed in the direction of the bottom or sieve.

Der Verschleißschutz 172 hat im Querschnitt eine in etwa U-förmige oder L-förmige Form und ist auf das jeweilige Rotorblatt 164 aufgesteckt, wobei eine auslaufende Nase 176 des jeweiligen Verschleißschutzes 172 im Nabenbereich nahe dem Grundkörper 162 freibeweglich in einer Führung (nicht dargestellt) ruht. Zum Befestigen des Verschleißschutzes 172 am Rotorblatt 164 sind nahe dem freien Ende 166 des Rotorblattes 164 zwei parallel zur Rotationsachse des Rotors 160 verlaufende Gewinde (nicht dargestellt) ausgebildet. Am oberen Schenkel des U-förmigen Verschleißschutzes 172 sind zwei Bohrungen ausgebildet, die bei montiertem Verschleißschutz 172 zu den an dem Rotorblatt 164 ausgebildeten Gewinden ausgerichtet sind. Mit Hilfe zweier Schrauben 178 und 180 ist der Verschleißschutz 172 am Rotorblatt 164 befestigt.The wear protection 172 has an approximately U-shaped cross section or L-shaped shape and is attached to the respective rotor blade 164, wherein a leaking nose 176 of the respective wear protection 172 in the hub area near the base body 162 freely movable in a guide (not shown) rests. To attach the wear protection 172 on Rotor blade 164 is two near free end 166 of rotor blade 164 Threads running parallel to the axis of rotation of the rotor 160 (not shown) trained. On the upper leg of the U-shaped wear protection 172 two holes are formed with the wear protection installed 172 to the threads formed on the rotor blade 164 are aligned. With the help of two screws 178 and 180 the wear protection 172 attached to the rotor blade 164.

In dem dargestellten vierten Ausführungsbeispiel entspricht der Verlauf des Verschleißschutzes 172 dem bogenförmigen Verlauf des Rotorblattes 164. Anstelle eines bogenförmigen Verlaufes ist es auch denkbar, Rotorblätter am Rotor vorzusehen, die S-förmig oder sichelförmig verlaufen. In the fourth exemplary embodiment shown, the course corresponds wear protection 172 the arcuate course of the rotor blade 164. Instead of an arcuate course, it is also conceivable for rotor blades to be provided on the rotor, which are S-shaped or crescent-shaped.

Zum Schutz der Rotorblätter werden in diesem Fall entsprechend S-förmig bzw. sichelförmig gestaltete Verschleißschutze verwendet.In this case, to protect the rotor blades, they are S-shaped or crescent-shaped wear protection used.

Bei den beschriebenen Ausführungsbeispielen wurden Rotoren für Papierstoffaufbereitungsmaschinen beschrieben, die zum Umwälzen der Stoffsuspension ausschließlich mit Rotorblättern versehen sind, die in einer gemeinsamen Ebene angeordnet sind. Des weiteren ist es denkbar, Rotoren zu verwenden, die in verschiedenen Ebenen angeordnete Rotorblätter aufweisen, oder an deren Grundkörper zusätzlich eine vorzugsweise kegelförmige Schraubenwendel befestigt ist, deren Schraubenachse mit der Rotationsachse des Rotors zusammenfällt und mit der das Strömungsverhalten der Stoffsuspension im Behälter der Papierstoffaufbereitungsmaschine beeinflußt werden kann. In the described exemplary embodiments, rotors have been used for paper preparation machines described that to circulate the stock suspension are only provided with rotor blades that are in one common level are arranged. It is also conceivable to use rotors to use the rotor blades arranged in different levels have, or on the base body additionally a preferably conical Screw coil is attached, the screw axis with the Rotation axis of the rotor coincides and with which the flow behavior the stock suspension in the container of the stock preparation machine can be influenced.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Rotorrotor
1212
Grundkörperbody
1414
Rotorblätterrotor blades
1616
Stützplattesupport plate
1818
Rotationsrichtungdirection of rotation
2020
Vorderflächefront surface
2222
rückwärtige Flächerear surface
2424
DurchgangsbohrungThrough Hole
2626
DurchgangsbohrungThrough Hole
2828
DurchgangsbohrungThrough Hole
3030
freies Endefree end
3232
obere Seitenkanteupper side edge
3434
untere Seitenkantelower side edge
3636
Hülseshell
3838
Hülseshell
4040
Hülseshell
4242
Verschleißschutzwear protection
4444
Vorderseitefront
4646
Randedge
4848
Rückseiteback
5050
Schraubenbolzenbolt
5252
Schraubenbolzenbolt
5454
Schraubenbolzenbolt
5656
Muttermother
5858
Mutter mother
6060
Muttermother
7070
Rotorrotor
7272
Grundkörperbody
7474
Rotorblätterrotor blades
7676
Befestigungsabschnittattachment section
7878
RotorblattabschnittRotor blade section
8080
freies Endefree end
8282
Rotationsrichtungdirection of rotation
8484
rückwärtige Flächerear surface
8686
Vorderflächefront surface
8888
Sacklochblind
9090
Sacklochblind
9292
DurchgangsbohrungThrough Hole
9494
Ausnehmungrecess
9696
Endabschnittend
9898
Verschleißschutzwear protection
100100
Rückseiteback
102102
Zapfenspigot
104104
Zapfenspigot
106106
Schraubenbolzenbolt
108108
Muttermother
110110
Rotorrotor
112112
Rotorblätterrotor blades
114114
DurchgangsbohrungThrough Hole
116116
DurchgangsbohrungThrough Hole
118118
Sackloch blind
120120
rückwärtige Flächerear surface
122122
Ausnehmungrecess
124124
Ausnehmungrecess
126126
Verschleißschutzwear protection
128128
Rückseiteback
130130
Zapfenspigot
132132
Schraubenbolzenbolt
134134
Schraubenbolzenbolt
136136
Muttermother
138138
Muttermother
140140
freies Endefree end
142142
Stirnseitefront
144144
Oberseitetop
146146
RotorblattabschnittRotor blade section
148148
Stützelementsupport element
150150
Aussparungenrecesses
160160
Rotorrotor
162162
Grundkörperbody
164164
Rotorblätterrotor blades
166166
freies Endefree end
168168
Rotationsrichtungdirection of rotation
170170
Vorderflächefront surface
172172
Verschleißschutzwear protection
174174
Vorderseitefront
176176
Nasenose
178178
Schraubescrew
180180
Schraubescrew

Claims (14)

  1. A rotor for a stock preparation machine which is arranged in a container of the stock preparation machine and which has a plurality of rotor blades (14, 74; 112; 164) for the circulation of a stock suspension contained in the container and for the comminution of paper material contained in the stock suspension, wherein a wear protector (42; 98; 126; 172) is releasably secured to a leading front surface (20; 86; 170) of each rotor blade (14; 74; 112; 164) as seen in the direction of rotation (18; 82; 168) of the rotor (10; 70; 110; 160), characterised in that the side edges of the wear protector (42; 98; 126; 172) secured to the rotor blade (14; 74; 112; 164) project at least partly over a contour bounding the front surface (20; 86; 168) of the rotor blade (14; 74; 112; 164).
  2. A rotor in accordance with claim 1, characterised in that at least one part section of the front surface (20; 86; 168) of each rotor blade (14; 74; 112; 164) starting at the free end (30; 80; 140; 166) of the rotor blade (14; 74; 112; 164) is completely covered by the wear protector (42; 98; 126; 172).
  3. A rotor in accordance with claim 1 or claim 2, characterised in that the wear protector (42; 98; 126; 172) secured to the rotor blade (14; 74; 112; 164) projects at its one end over the free end (30; 80; 166) of the rotor blade (14; 74; 112; 164) in the radial direction seen with respect to the axis of rotation of the rotor (10; 70; 110; 160).
  4. A rotor in accordance with claim 3, characterised in that the one end of the wear protector (42; 98; 126; 172) projecting over the free end (30; 80; 140; 166) of the respective rotor blade (14; 74; 112; 164) extends in the direction of the lower side of the rotor blade (14; 74; 112; 164) confronting the container base in such an inclined manner that the radial spacing of the end with respect to the rotation axis of the rotor (10; 70; 110; 160) reduces.
  5. A rotor in accordance with any of claims 1 to 4, characterised in that at least one bolt (50, 52, 54; 106; 132, 134) projects from a rear side of the wear protector (42; 98; 126) contacting the front surface (20; 86) of the rotor blade (14; 74; 112) for the securing of the wear protector (42; 98; 126) to the respective rotor blade (14; 74; 112), said bolt protruding through a passage opening (24, 26, 28; 92; 114, 116) formed in the rotor blade (14; 74; 112) and being screwed to a rear surface (22; 84; 120) of the rotor blade (14; 74; 112) remote from the front surface (20; 86) with the aid of a nut, preferably a self-locking nut, (56, 58, 60; 108; 136; 138).
  6. Wear protector for the protection of a rotor blade at a rotor (10; 70; 110; 160) arranged in a container of a stock preparation machine, whose rotor blades (14; 74; 112; 164) serve for the circulation of a stock suspension contained in the container and for the comminution of paper material contained in the stock suspension, wherein the wear protector (42; 98; 126; 172) is releasably secured to the leading front surface (20; 86; 170) of the rotor blade (14; 74; 112; 164) to be protected as seen in the direction of rotation (18; 82; 168) of the rotor (10; 70; 110; 160), characterised in that the wear protector (42; 98; 126; 172) is dimensioned such that its side edges project at least partly over a contour bounding the front surface (20; 86; 168) of the rotor blade (14; 74, 11; 164) in the state secured to the rotor blade (14; 74; 11; 164).
  7. Wear protector in accordance with claim 6, characterised in that, for the releasable securing, at least one bolt (50, 52, 54; 106, 132, 134) projects from a rear side (40, 100; 128) of the wear protector (42; 98; 126) confronting the front surface (20; 86) of the rotor blade (14; 74; 112), said bolt being capable of being screwed to the rotor blade (14; 74; 112) by a nut, preferably by a self-locking nut, (56, 58, 60; 108; 136, 138).
  8. Wear protector in accordance with claim 6 or claim 7, characterised in that at least one centring pin (102, 104; 130) projecting from a rear side (100; 128) of the wear protector (98; 126) confronting the front surface (86) of the rotor blade (74; 112) or from the front surface (86) of the rotor blade (74; 112) is receivable in a bore (88, 90; 118) formed at the rotor blade (74; 112) or at the wear protector (98; 126) respectively.
  9. Wear protector in accordance with claim 6, claim 7 or claim 8, characterised in that a front side (44) of the wear protector (42) remote from the front surface (20) of the rotor blade (14) has an projecting rim (46) which merges into edges forming the contour of the front side (44).
  10. Wear protector in accordance with any one of claims 6 to 9, characterised in that the contour of a front side (44) of the wear protector (42) remote from the front surface (20) of the rotor blade (14) is provided at least in part with a chamfer.
  11. Wear protector in accordance with any one of claims 6 to 10, characterised in that at least one of the side edges of the wear protector (126) has a plurality of recesses (150) to influence the circulation movement of the stock suspension.
  12. Wear protector in accordance with any one of claims 6 to 11, characterised in that at least one support element (148) projects from a rear side (128) of the wear protector (126) confronting the front surface of the rotor blade (112), said support element being supported at an upper side (144) of the rotor blade (112) remote from the container base with the wear protector (126) installed.
  13. Wear protector in accordance with any one of claims 6 to 12, characterised in that the front side of the wear protector (42; 98; 126; 172) extends in an inclined manner at an angle to the container base of the stock preparation machine in the installed state.
  14. Wear protector in accordance with any one of claims 6 to 13, characterised in that the wear protector (42; 98; 126; 172) is formed from a wear-resistant material, preferably a non rusting, alloyed stainless steel.
EP19990104475 1999-03-05 1999-03-05 Rotor with wear protector for a pulper Expired - Lifetime EP1036877B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59901791T DE59901791D1 (en) 1999-03-05 1999-03-05 Rotor with wear protection for a pulper
EP19990104475 EP1036877B1 (en) 1999-03-05 1999-03-05 Rotor with wear protector for a pulper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19990104475 EP1036877B1 (en) 1999-03-05 1999-03-05 Rotor with wear protector for a pulper

Publications (2)

Publication Number Publication Date
EP1036877A1 EP1036877A1 (en) 2000-09-20
EP1036877B1 true EP1036877B1 (en) 2002-06-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (2)

Country Link
EP (1) EP1036877B1 (en)
DE (1) DE59901791D1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2513609A1 (en) * 2003-01-16 2004-08-05 Kadant Black Clawson Inc. Improved pulper rotor and assembly
DE102009012236A1 (en) 2009-03-07 2010-09-09 Voith Patent Gmbh Rotor for use in container of e.g. pulper, has wear protection unit detachably attached to leading front surface of rotor blade, where wear protection unit is made in two parts and rotor blade is designed as plate
DE102011082976A1 (en) 2011-09-19 2013-03-21 Günter Betz Device for breaking up (shredding, shredding, dissolving, processing) of waste paper and pulp in a pulper (pulper)
CN111424450B (en) * 2020-04-10 2022-06-17 郑州磊展科技造纸机械有限公司 High-concentration hydraulic pulper with sieve plate
CN112958237B (en) * 2021-01-29 2022-06-07 福建省明辉机械制造有限公司 Assembled wood pulp rubbing crusher

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191405018A (en) * 1914-02-26 1914-09-17 Robert Joseph Marx Improvements applicable to Pulping Engines and the like.
FI78934C (en) * 1988-02-10 1989-10-10 Sunds Defibrator Jylha Oy ANORDNING FOER DESTRUKTION AV PAPPER, KARTONG ELLER DYLIKA.
BE1010118A3 (en) * 1996-04-05 1998-01-06 Magotteaux Int Mixer propeller
SE509293C2 (en) * 1997-04-29 1999-01-11 Cellwood Machinery Ab Device at mass solver

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DE59901791D1 (en) 2002-07-25

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