EP0443195A1 - Abrasion-resistant cladding for the roller surfaces of roller machines, in particular high-pressure roller presses - Google Patents
Abrasion-resistant cladding for the roller surfaces of roller machines, in particular high-pressure roller presses Download PDFInfo
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- EP0443195A1 EP0443195A1 EP90125365A EP90125365A EP0443195A1 EP 0443195 A1 EP0443195 A1 EP 0443195A1 EP 90125365 A EP90125365 A EP 90125365A EP 90125365 A EP90125365 A EP 90125365A EP 0443195 A1 EP0443195 A1 EP 0443195A1
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- roller
- profiles
- pockets
- stud bolts
- armor according
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/30—Shape or construction of rollers
- B02C4/305—Wear resistant rollers
Definitions
- the invention relates to a wear-resistant surface armor for the rollers of roller machines, in particular high-pressure roller presses for pressure comminution of granular material, with a multiplicity of outwardly projecting profiles attached to the roller surface at a distance from one another.
- roller crushers and roller mills In the case of roller crushers and roller mills, brittle ground material is drawn into the roller gap, through which the two rotatably mounted counter-rotating rollers are separated from one another, where it is subjected to pressure reduction.
- material bed comminution in the nip of a high-pressure roller press in which the individual particles of the ground material drawn into the nip by friction in a material bed, ie. H. are crushed in a material bed compressed between the two roller surfaces when an extremely high pressure is applied (EP-PS 0 084 383). It is understood that the roller surfaces are subjected to extremely high stress and wear.
- the closed hard outer shell of the armored roller shells can be overstressed by the formation of pressure islands in the roller gap filled with the material to be pressed, with high local point loads on the rollers; Surface cracks can lead to crack propagation in the roller body and / or with a soft underlayer, the welded-on hard profile parts can be squeezed out to the side.
- the risk that the welded profiled welding beads projecting outward may at least partially break out at high point loads is also not excluded.
- the invention is based, for the rollers of roller machines, in particular of high-pressure roller presses for pressure comminution of granular goods, an armor that is simple to manufacture, wear-resistant and capable of being pulled in to create, which, despite profiling and therefore good retraction capacity, has a long service life with a minimized risk of cracking even at high point loads.
- the multiplicity of profiles attached to the roller surface protrude outward from the roller surface with such a great height and are so closely spaced from one another that the gaps or pockets between the profiles during operation of the roller press are filled with one and the same compressed fine-grained material, which remains in the gaps or pockets during the roller revolutions, i.e. the profiles are able to hold the material pressed in between them.
- the compressed fine-grained material remaining in the gaps or pockets between the roller surface profiles during the roller revolutions can consist of the material to be comminuted by means of material bed comminution in the roller gap of the roller press, which material is stored in these gaps or pockets at the start of the roller press operation and remains there .
- the spaces or pockets between the profiles of the roller surface can also be filled in advance with a foreign compressed fine-grained material, for example in the building materials area.
- a suitable binder can also be used to increase the adhesion of the materials.
- the good pull-in capacity of the press rolls can be increased if neighboring profiles have different heights.
- the profiles attached to the roll surface can consist of strips which are arranged in the roll axial direction or at an angle of 0 to 90 ° thereto.
- the profiles can also be made from a multitude of protruding from the roller surface preferably welded studs exist, which are advantageously arranged in a grid pattern on the roller surface such that the distance between adjacent studs is always approximately the same, both in the same row of studs and to adjacent rows of studs.
- the distance between the adjacent studs is chosen so large that the compressed material remains in the spaces or pockets between the studs during the rotation of the rollers and forms the actual (autogenous) wear protection.
- This roller surface armoring according to the invention with the hard, wear-resistant nub bolts distributed in the shape of an hedgehog over the roller surface is also able to withstand point-like peak loads, such as can also occur during material bed comminution in the area of the narrowest roller gap of a high-pressure roller press, without destroying the nub bolts To drain the environment as crack-free as possible in the roller base body, which results in the high durability of the roller armor according to the invention.
- Fig. 1 shows a top view schematically a two-roll machine, for. B. high-pressure roller press for material bed comminution of granular goods, which from above via a feed hopper, not shown the nip between the fixed roller (10) and the loose roller (11) is fed.
- a plurality of outwardly projecting profile strips (12, 13, 14) are welded onto the surface of the driven rollers (10, 11) which rotate in opposite directions and which are arranged so as to be distributed in a grid pattern.
- the profile strips could also be arranged on the roll surface in the direction of the roll axis, in a V-shape and the like.
- a plurality of approximately equal spaces or pockets (15) are formed, which due to the high pressure in the narrowest nip fill up after a short period of operation with the granular material under pressure, which due to the comparatively Small distance between the adjacent profiles (13, 14) preferably less than 40 mm and a profile height preferably greater than 5 mm remains in the pockets (15) during the roller revolutions.
- Fig. 2 different shapes of profile strips (13, 14) are shown enlarged in cross section.
- the cross section of the profile strips (16 and 19) is rectangular, the profile strips (17, 18 and 20) trapezoidal, and the profile strip shown on the far right has a circumferential groove (21) on its circumference, so that this embodiment is in operation the roller press not only the spaces or pockets between the individual profile strips with the compressed fine-grained material fill out, but also the recess (21).
- the profile strips (19, 20, 21) are welded, soldered, glued or the like onto the roller surface (22)
- the profile strips (16, 17, 18) are anchored in the material of the roller surface (22), e.g. B. by a dovetail groove connection (23).
- All profile strips (16 to 21) have in common that they consist of a hard metallic alloy material, which allows the formation of sharp edges that would not be achievable by build-up welding beads. In this way, the profile strips with their sharp edges are in a very good position to permanently hold the fine-grained good material that is embedded or pressed in between the profile strips as wear protection for the roller surface (22). This applies particularly to the profile strip (18 / with its undercuts.
- the adjacent profile strips (24, 25, 26, 27, 28) can have different heights in order to increase the good pull-in capacity of the press rolls.
- the compressed fine-grained material (29, 30) embedded in the spaces or pockets between the profile strips (24 to 28) during operation of the roller press can be clearly seen, which forms the autogenous wear protection.
- good material (29, 30) can subsequently be reintroduced by simple pressing for the purpose of repairing or regenerating the rollers.
- a plurality of is on the surface of the rollers (31, 32) welded out protruding stud bolts (33).
- the stud bolts (33) are advantageously welded in a grid pattern in such a way that the stud bolt rows (34, 35) applied along the roll surface lines are each offset from one another with a gap.
- the distance between adjacent stud bolts both in the same stud stud row and to adjacent stud stud rows can always be approximately the same size, so that between the individual stud studs approximately uniform and equally large gaps or pockets (36) are formed, which are formed during the operation of the roller press , ie fill granular goods with good material when carrying out the material bed comminution, the size of these spaces or pockets (36) being dimensioned so large that the material good during the entire rotation of the rollers (31, 32) for the purpose of autogenous wear protection in these pockets (36) remains.
- Fig. 5 shows an enlarged detail of the vertical section through the stud bolt (33) of Fig. 4 in the welded state.
- the lower layer of the studded stud (33) and all other studded studs as well as the profiled strips can consist of an annular bandage (37) applied to the base body of the roll and / or of at least one layer of welded-on weld beads lying next to one another.
- the material of the lower layer (37) is selected so that the stud bolts (33) or profile strips can be welded on well or can be applied using other joining techniques.
- the stud bolts themselves can have a cylindrical, have a frustoconical or pyramidal configuration.
- the material of the hard wear-resistant profile strips of Figures 1 to 3 and the stud bolts (33) of Figures 4 and 5 can be made of a metallic alloy with hard materials in the structure, for. B. carbides and / or special carbides exist and / or high carbon and / or high chromium.
- the profile strips of Figures 1 to 3 and also the stud bolts (33) of Figures 4 and 5 can also consist of hard ceramic material, cemented carbide or the like.
- the material of the profile strips or stud bolts after welding advantageously has a core hardness of more than 52 HRC (Rockwell C hardness test).
- the profile strips of Figures 1 to 3 and the stud bolts (33) of Figures 4 and 5 have a height of at least about 5 mm, z. B. 10 mm, and a thickness (diameter) of at least about 8 mm, e.g. B. 15 mm, on, with a roll diameter of at least 500 mm.
- the invention can be used particularly well for the surface armouring of rollers of high-pressure roller presses for material bed comminution or pressure treatment of ores, including ores containing diamond, which are particularly abrasive goods.
- the durability of the roller armor according to the invention is high even with such abrasive goods, because only the radially outer surfaces of the profile strips or stud bolts are subject to wear, while the other areas of the roller surface and the profiles applied to them are affected by the self-constructed wear protection layer consisting of compressed good material are protected against wear.
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Drying Of Solid Materials (AREA)
- Press Drives And Press Lines (AREA)
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
- Glanulating (AREA)
- Formation And Processing Of Food Products (AREA)
Abstract
Description
Die Erfindung betrifft eine verschleißfeste Oberflächenpanzerung für die Walzen von Walzenmaschinen, insbesondere von Hochdruck-Walzenpressen zur Druckzerkleinerung körnigen Gutes, mit einer Vielzahl von an der Walzenoberfläche mit Abstand voneinander angebrachten nach außen vorstehenden Profilen.The invention relates to a wear-resistant surface armor for the rollers of roller machines, in particular high-pressure roller presses for pressure comminution of granular material, with a multiplicity of outwardly projecting profiles attached to the roller surface at a distance from one another.
Bei Walzenbrechern und Walzenmühlen wird sprödes Mahlgut in den Walzenspalt, durch den die beiden drehbar gelagerten gegenläufig rotierbaren Walzen voneinander getrennt sind, eingezogen und dort einer Druckzerkleinerung unterworfen. Bekannt ist auch die sogenannte Gutbettzerkleinerung im Walzenspalt einer Hochdruck-Walzenpresse, bei der die einzelnen Partikel des durch Reibung in den Walzenspalt eingezogenen Mahlgutes in einem Gutbett, d. h. in einer zwischen den beiden Walzenoberflächen zusammengedrückten Materialschüttung bei Anwendung eines extrem hohen Druckes gegenseitig zerquetscht werden (EP-PS 0 084 383). Es versteht sich, daß dabei die Walzenoberflächen einer außerordentlich hohen Beanspruchung und einem hohen Verschleiß ausgesetzt sind. Es ist daher bekannt, die Walzenoberflächen dadurch zu panzern, indem man auf den Walzengrundkörper aus nebeneinanderliegenden aufgeschweißten Schweißraupen bestehende Schweißlagen aus harten metallischen Werkstoffen aufschweißt, oder indem man auf den Walzengrundkörper einen einteiligen oder mehrteiligen verschleißfesten Mantel aus gegossenem oder gewalztem Werkstoff aufbringt. Bei einer aufgeschweißten Walzenpanzerung wird diese durch zeitaufwendiges Auftragsschweißen von in der Regel nebeneinanderliegenden Ringlagen oder durch eine endlose spiralförmige Aufschweißung aufgebaut.In the case of roller crushers and roller mills, brittle ground material is drawn into the roller gap, through which the two rotatably mounted counter-rotating rollers are separated from one another, where it is subjected to pressure reduction. Also known is the so-called material bed comminution in the nip of a high-pressure roller press, in which the individual particles of the ground material drawn into the nip by friction in a material bed, ie. H. are crushed in a material bed compressed between the two roller surfaces when an extremely high pressure is applied (EP-PS 0 084 383). It is understood that the roller surfaces are subjected to extremely high stress and wear. It is therefore known to armor the roller surfaces by welding welding layers of hard metallic materials consisting of welded beads lying side by side onto the roller base body, or by applying a one-piece or multi-part wear-resistant jacket made of cast or rolled material to the roller base body. In the case of a welded-on roller armor, this is built up by time-consuming deposition welding of ring layers which are generally adjacent to one another or by an endless spiral welding.
Um das Guteinzugsvermögen der Pressenwalzen, die das Gut durch Reibung in den Walzenspalt einziehen und verdichten müssen, zu verbessern, ist es bekannt, den gepanzerten Walzenmantel auf seiner geschlossenen harten zylindrischen Oberfläche in einem zusätzlichen Fertigungsschritt mit einer Vielzahl vorspringender Profile in Gestalt von z. B. V-förmig angeordneter Schweißraupen zu versehen (EP-PS 0 084 383 Seite 5 vorletzter Absatz). Es hat sich aber bei der Gutbettzerkleinerung besonders abrasiver Güter wie Erze gezeigt, daß beim Betrieb der Walzenpresse die Gefahr nicht ausgeschlossen ist, daß die Walzenoberfläche durch Entstehung muldenförmiger Auswaschungen bzw. Ausgrabungen in den Bereichen zwischen den mit Abstand voneinander aufgeschweißten Profilierungs-Schweißraupen verhältnismäßig schnell verschleißt, weil immer neues zu zerkleinerndes Gutmaterial in die Zwischenräume zwischen den aufgeschweißten Profilierungs-Schweißraupen hineingepreßt wird und sich dort eingräbt. Durch Druckinsel-Bildung im mit zu pressendem Gutmaterial gefüllten Walzenspalt mit hoher örtlicher Punktbelastung der Walzen kann die geschlossene harte Außenschale der gepanzerten Walzenmäntel überbeansprucht werden; Oberflächenrisse können zur Rißfortschreitung in den Walzengrundkörper führen und/oder bei einer weichen Unterschicht können die aufgeschweißten harten Profilteile seitlich weggequetscht werden. Dabei ist auch die Gefahr nicht ausgeschlossen, daß bei hoher Punktbelastung die nach außen vorspringenden aufgeschweißten Profilierungs-Schweißraupen wenigstens teilweise ausbrechen können.In order to improve the good pulling-in capacity of the press rolls, which have to pull and compress the good by friction into the roll gap, it is known to insert the armored roll shell on its closed, hard cylindrical surface an additional manufacturing step with a variety of protruding profiles in the form of z. B. V-shaped welding beads to be provided (EP-PS 0 084 383 page 5 penultimate paragraph). However, it has been shown in the case of material bed comminution of particularly abrasive goods such as ores that the operation of the roller press does not preclude the risk that the roller surface will wear out relatively quickly as a result of trough-shaped washouts or excavations in the areas between the profiled welding beads welded on at a distance from one another , because new material to be shredded is pressed into the spaces between the welded profiling weld beads and digs in there. The closed hard outer shell of the armored roller shells can be overstressed by the formation of pressure islands in the roller gap filled with the material to be pressed, with high local point loads on the rollers; Surface cracks can lead to crack propagation in the roller body and / or with a soft underlayer, the welded-on hard profile parts can be squeezed out to the side. The risk that the welded profiled welding beads projecting outward may at least partially break out at high point loads is also not excluded.
Der Erfindung liegt die Aufgabe zugrunde, für die Walzen von Walzenmaschinen, insbesondere von Hochdruck-Walzenpressen zur Druckzerkleinerung körnigen Gutes, eine fertigungstechnisch einfache, verschleißfeste und einzugsleistungsfähige Panzerung zu schaffen, die trotz Profilierung und daher guten Guteinzugsvermögens auch bei hoher Punktbelastung ein hohes Standzeitvermögen mit minimierter Rißbildungsgefahr aufweist.The invention is based, for the rollers of roller machines, in particular of high-pressure roller presses for pressure comminution of granular goods, an armor that is simple to manufacture, wear-resistant and capable of being pulled in to create, which, despite profiling and therefore good retraction capacity, has a long service life with a minimized risk of cracking even at high point loads.
Diese Aufgabe wird gemäß der Erfindung mit den Maßnahmen des Kennzeichnungsteiles des Anspruchs 1 gelöst. Vorteilhafte Ausbildungen sind in den Unteransprüchen angegeben.This object is achieved according to the invention with the measures of the characterizing part of claim 1. Advantageous designs are specified in the subclaims.
Charakteristisch für die erfindungsgemäße Walzenpanzerung ist, daß die Vielzahl von an der Walzenoberfläche angebrachten Profilen mit einer so großen Höhe nach außen von der Walzenoberfläche vorstehen und mit einem so engen Abstand voneinander angeordnet sind, daß im Betrieb der Walzenpresse die Zwischenräume bzw. Taschen zwischen den Profilen mit ein und demselben zusammengepreßtem feinkörnigem Gut ausgefüllt sind, welches während der Walzenumdrehungen in den Zwischenräumen bzw. Taschen liegenbleibt, d h. die Profile sind in der Lage, das zwischen ihnen eingepreßte Gut festzuhalten. Das während der Walzenumdrehungen in den Zwischenräumen bzw. Taschen zwischen den Walzenoberflächen-Profilen verbleibende zusammengepreßte feinkörnige Gut kann aus dem im Walzenspalt der Walzenpresse durch Gutbettzerkleinerung zu zerkleinernden Gut selbst bestehen, welches sich zu Beginn des Walzenpressenbetriebes in diese Zwischenräume bzw. Taschen einlagert und dort liegenbleibt. Die Zwischenräume bzw. Taschen zwischen den Profilen der Walzenoberfläche können aber auch vorab mit einem fremden zusammengepreßten feinkörnigen Gut ausgefüllt werden, im Baustoffbereich z. B. mit einem Zementklinker/Gips-Gemisch oder im Erzbereich z. B. mit hochverschleißfestem Keramikmaterial, welches in den Zwischenräumen bzw. Taschen verbleibt. Zum noch sichereren Festhalten der zusammengepreßten feinkörnigen verschleißfesten Materialien in den Zwischenräumen bzw. Taschen zwischen den Walzenoberflächen-Profilen kann auch ein geeignetes Bindemittel zwecks Erhöhung der Haftung der Materialien zur Anwendung kommen. In jedem Fall bildet das in die Zwischenräume bzw. Taschen zwischen den Profilen hineingepreßte und dort verbleibende Gutmaterial einen idealen (autogenen) Verschleißschutz, wogegen die eingangs beschriebenen bisherigen Oberflächenpanzerungen von Walzen einem ständigen neuen Abrieb bzw. Verschleiß unter Bildung der unerwünschten Oberflächenauswaschungen ausgesetzt gewesen sind.It is characteristic of the roller armor according to the invention that the multiplicity of profiles attached to the roller surface protrude outward from the roller surface with such a great height and are so closely spaced from one another that the gaps or pockets between the profiles during operation of the roller press are filled with one and the same compressed fine-grained material, which remains in the gaps or pockets during the roller revolutions, i.e. the profiles are able to hold the material pressed in between them. The compressed fine-grained material remaining in the gaps or pockets between the roller surface profiles during the roller revolutions can consist of the material to be comminuted by means of material bed comminution in the roller gap of the roller press, which material is stored in these gaps or pockets at the start of the roller press operation and remains there . The spaces or pockets between the profiles of the roller surface can also be filled in advance with a foreign compressed fine-grained material, for example in the building materials area. B. with a cement clinker / gypsum mixture or in the ore area z. B. with highly wear-resistant ceramic material, which remains in the spaces or pockets. To hold the compressed fine-grained wear-resistant materials in the interstices or pockets between the roller surface profiles even more securely, a suitable binder can also be used to increase the adhesion of the materials. In any case, the good material pressed into the interstices or pockets between the profiles and remaining there forms an ideal (autogenous) wear protection, whereas the previously described surface armouring of rollers has been exposed to constant new abrasion or wear, with the formation of the undesirable surface washout.
Auch nach Gutmaterialfüllung der Zwischenräume bzw. Taschen zwischen den an der Walzenoberfläche befestigten Profilen, deren Abstand voneinander vorzugsweise kleiner 40 mm und deren Höhe mit Vorteil größer 5 mm betragen, können deren Enden noch deutlich hervorstehen, so daß das Guteinzugsvermögen der erfindungsgemäß gepanzerten Walzenoberflächen hoch bleibt. Dabei kann das Guteinzugsvermögen der Pressenwalzen noch gesteigert werden, wenn benachbarte Profile eine unterschiedliche Höhe aufweisen.Even after good material filling of the spaces or pockets between the profiles fastened to the roller surface, the distance from one another preferably less than 40 mm and the height advantageously greater than 5 mm, their ends can still protrude significantly, so that the good retraction capacity of the roller surfaces armored according to the invention remains high . The good pull-in capacity of the press rolls can be increased if neighboring profiles have different heights.
Die an der Walzenoberfläche angebrachten Profile können aus Leisten bestehen, die in walzenaxialer Richtung oder in einem Winkel von 0 bis 90° dazu angeordnet sind. Die Profile können aber auch aus einer Vielzahl von von der Walzenoberfläche vorspringenden vorzugsweise angeschweißten Noppenbolzen bestehen, welche auf der Walzenoberfläche mit Vorteil gittermusterförmig verteilt angeordnet sind derart, daß der Abstand benachbarter Noppenbolzen sowohl in derselben Noppenbolzenreihe als auch zu benachbarten Noppenbolzenreihen immer etwa gleich groß ist. Auch bei dieser Lösung wird der Abstand zwischen den benachbarten Noppenpbolzen jeweils so groß gewählt, daß das zusammengepreßte Gutmaterial während der Umdrehung der Walzen in den Zwischenräumen bzw. Taschen zwischen den Noppenbolzen verbleibt und den eigentlichen (autogenen) Verschleißschutz bildet. Diese erfindungsgemäße Walzen-Oberflächenpanzerung mit den igelförmig über die Walzenoberfläche verteilten harten verschleißfesten Noppenbolzen ist auch in der Lage, punktförmige Spitzenbelastungen, wie sie gerade auch bei der Gutbettzerkleinerung im Bereich des engsten Walzenspaltes einer Hochdruck-Walzenpresse auftreten können, über die vorstehenden Noppenbolzen ohne Zerstörung ihres Umfeldes möglichst rißfrei in den Walzengrundkörper abzuleiten, wodurch sich das hohe Standzeitvermögen der erfindungsgemäßen Walzenpanzerung ergibt.The profiles attached to the roll surface can consist of strips which are arranged in the roll axial direction or at an angle of 0 to 90 ° thereto. However, the profiles can also be made from a multitude of protruding from the roller surface preferably welded studs exist, which are advantageously arranged in a grid pattern on the roller surface such that the distance between adjacent studs is always approximately the same, both in the same row of studs and to adjacent rows of studs. In this solution, too, the distance between the adjacent studs is chosen so large that the compressed material remains in the spaces or pockets between the studs during the rotation of the rollers and forms the actual (autogenous) wear protection. This roller surface armoring according to the invention with the hard, wear-resistant nub bolts distributed in the shape of an hedgehog over the roller surface is also able to withstand point-like peak loads, such as can also occur during material bed comminution in the area of the narrowest roller gap of a high-pressure roller press, without destroying the nub bolts To drain the environment as crack-free as possible in the roller base body, which results in the high durability of the roller armor according to the invention.
Sollten während des Betriebes der Hochdruck-Walzenpresse einzelne Profilleisten oder Noppenbolzen wegbrechen, obwohl diese unter anderem durch das in den Zwischenräumen bzw. Taschen zwischen den Profilleisten bzw. Noppenbolzen eingelagerte Gutmaterial davor geschützt sind, so ist eine einfache Wiederinstandsetzung begrenzter zerstörter Oberflächen der erfindungsgemäßen Walzenpanzerung durch Aufschweißen neuer Profilleisten bzw. Noppenbolzen ohne weiteres in kurzer Zeit möglich. Diese Wiederinstandsetzung ist wesentlich einfacher und kostengünstiger als die bisher notwendig gewesene Ausbesserung ganzer Partien ausgebrochener bzw. ausgewaschener zusammenhängender Panzerungsflächen.Should individual profile strips or stud bolts break away during operation of the high-pressure roller press, even though these are protected from them by the material stored in the spaces or pockets between the profile strips or stud bolts, simple repair of limited destroyed surfaces of the roller armor according to the invention is possible Welding new profile strips or stud bolts easily possible in a short time. This repair is much easier and less expensive than the previously necessary repair of entire parts of broken or washed out connected armor surfaces.
Die Erfindung und deren weitere Merkmale und Vorteile werden anhand der in den Figuren schematisch dargestellten Ausführungsbeispiele näher erläutert.The invention and its further features and advantages are explained in more detail with reference to the exemplary embodiments shown schematically in the figures.
Es zeigt:
- Fig. 1
- die Draufsicht auf die beiden Walzen einer Zweiwalzenmaschine z. B. Hochdruck-Walzenpresse mit einer ersten Ausführungsform der erfindungsgemäßen Oberflächenpanzerung;
- Fig. 2
- schematisch im Querschnitt verschiedene Formen von an der Walzenoberfläche angebrachten Profilleisten;
- Fig. 3
- an der Walzenoberfläche mit Abstand voneinander angebrachte Profilleisten mit unterschiedlicher Profilhöhe;
- Fig. 4
- die Draufsicht auf die beiden Walzen einer Hochdruck-Walzenpresse mit einer anderen Ausführungsform der erfindungsgemäßen Oberflächenpanzerung mit aufgeschweißten Noppenbolzen, und
- Fig. 5
- ausschnittsweise vergrößert den Vertikalschnitt durch einen Noppenbolzen der Fig. 4.
- Fig. 1
- the top view of the two rolls of a two-roll machine z. B. high-pressure roller press with a first embodiment of the surface armoring according to the invention;
- Fig. 2
- schematically in cross section different shapes of profile strips attached to the roller surface;
- Fig. 3
- on the roller surface spaced profile strips with different profile height;
- Fig. 4
- the top view of the two rollers of a high-pressure roller press with another embodiment of the surface armor according to the invention with welded stud bolts, and
- Fig. 5
- 4 shows a section of the vertical section through a stud bolt of FIG. 4.
Fig. 1 zeigt in Draufsicht schematisch eine Zweiwalzenmaschine, z. B. Hochdruck-Walzenpresse zur Gutbettzerkleinerung körnigen Gutes, welches von oben über einen nicht dargestellten Gutaufgabeschacht dem Walzenspalt zwischen der Festwalze (10) und der Loswalze (11) zugeführt wird. Auf die Oberfläche der angetriebenen gegenläufig drehbaren Walzen (10, 11) ist eine Vielzahl von nach außen vorstehenden Profilleisten (12, 13, 14) aufgeschweißt, welche sich kreuzend gittermusterförmig verteilt angeordnet sind. Die Profilleisten könnten auch in walzenaxialer Richtung, in V-Form und dergleichen auf der Walzenoberfläche angeordnet sein. Zwischen den Profilleisten (13, 14) wird eine Vielzahl von etwa gleich großen Zwischenräumen bzw. Taschen (15) gebildet, die sich infolge des hohen Preßdruckes im Bereich des engsten Walzenspaltes bereits nach kurzer Betriebszeit mit dem druckbeanspruchten körnigen Gut füllen, welches aufgrund des vergleichsweise kleinen Abstandes der benachbarten Profile (13, 14) vorzugsweise kleiner 40 mm und einer Profilhöhe vorzugsweise größer 5 mm während der Walzenumdrehungen in den Taschen (15) verbleibt. Das in die Taschen (15) eingelagerte und dort verbleibende zusammengepreßte feinkörnige Gutmaterial bildet einen idealen autogenen Verschleißschutz für die gesamte Walzenoberfläche.Fig. 1 shows a top view schematically a two-roll machine, for. B. high-pressure roller press for material bed comminution of granular goods, which from above via a feed hopper, not shown the nip between the fixed roller (10) and the loose roller (11) is fed. A plurality of outwardly projecting profile strips (12, 13, 14) are welded onto the surface of the driven rollers (10, 11) which rotate in opposite directions and which are arranged so as to be distributed in a grid pattern. The profile strips could also be arranged on the roll surface in the direction of the roll axis, in a V-shape and the like. Between the profile strips (13, 14) a plurality of approximately equal spaces or pockets (15) are formed, which due to the high pressure in the narrowest nip fill up after a short period of operation with the granular material under pressure, which due to the comparatively Small distance between the adjacent profiles (13, 14) preferably less than 40 mm and a profile height preferably greater than 5 mm remains in the pockets (15) during the roller revolutions. The compressed fine-grained material stored in the pockets (15) and remaining there forms an ideal autogenous wear protection for the entire roller surface.
In Fig. 2 sind im Querschnitt vergrößert verschiedene Formen von Profilleisten (13, 14) dargestellt. So ist der Querschnitt der Profilleisten (16 und 19) rechteckig, der Profilleisten (17, 18 und 20) trapezförmig, und die ganz rechts dargestellte Profilleiste weist an ihrem Umfang eine umlaufende Nut (21) auf, so daß sich bei dieser Ausführungsform im Betrieb der Walzenpresse nicht nur die Zwischenräume bzw. Taschen zwischen den einzelnen Profilleisten mit dem zusammengepreßten feinkörnigen Gut ausfüllen, sondern auch noch die Ausnehmung (21) dazu. Während die Profilleisten (19, 20, 21) auf die Walzenoberfläche (22) aufgeschweißt, aufgelötet, aufgeklebt oder dergleichen sind, sind die Profilleisten (16, 17, 18) im Material der Walzenoberfläche (22) verankert, z. B. durch eine Schwalbenschwanz-Nutverbindung (23). Alle Profilleisten (16 bis 21) haben gemeinsam, daß sie aus einem harten metallischen Legierungswerkstoff bestehen, welcher die Ausbildung scharfer Kanten zuläßt, die durch Auftragsschweißraupen nicht erzielbar wären. Auf diese Weise sind die Profilleisten mit ihren scharfen Kanten sehr gut in der Lage, das zwischen den Profilleisten eingelagerte bzw. eingepreßte feinkörnige Gutmaterial dauerhaft als Verschleißschutz für die Walzenoberfläche (22) festzuhalten. Dies gilt besonders für die Profilleiste (18/ mit ihren Hinterschneidungen.In Fig. 2 different shapes of profile strips (13, 14) are shown enlarged in cross section. The cross section of the profile strips (16 and 19) is rectangular, the profile strips (17, 18 and 20) trapezoidal, and the profile strip shown on the far right has a circumferential groove (21) on its circumference, so that this embodiment is in operation the roller press not only the spaces or pockets between the individual profile strips with the compressed fine-grained material fill out, but also the recess (21). While the profile strips (19, 20, 21) are welded, soldered, glued or the like onto the roller surface (22), the profile strips (16, 17, 18) are anchored in the material of the roller surface (22), e.g. B. by a dovetail groove connection (23). All profile strips (16 to 21) have in common that they consist of a hard metallic alloy material, which allows the formation of sharp edges that would not be achievable by build-up welding beads. In this way, the profile strips with their sharp edges are in a very good position to permanently hold the fine-grained good material that is embedded or pressed in between the profile strips as wear protection for the roller surface (22). This applies particularly to the profile strip (18 / with its undercuts.
Wie aus Fig. 3 hervorgeht, können zur Steigerung des Guteinzugsvermögens der Pressenwalzen die benachbarten Profilleisten (24, 25, 26, 27, 28) eine unterschiedliche Höhe aufweisen. Deutlich ist das im Betrieb der Walzenpresse in die Zwischenräume bzw. Taschen zwischen den Profilleisten (24 bis 28) eingelagerte zusammengepreßte feinkörnige Gut (29, 30) zu sehen, welches den autogenen Verschleißschutz bildet. Im Verschleißfall kann Gutmaterial (29, 30) nachträglich wieder durch einfaches Verpressen zum Zwecke der Reparatur bzw. Regenerierung der Walzen eingebracht werden.As can be seen from FIG. 3, the adjacent profile strips (24, 25, 26, 27, 28) can have different heights in order to increase the good pull-in capacity of the press rolls. The compressed fine-grained material (29, 30) embedded in the spaces or pockets between the profile strips (24 to 28) during operation of the roller press can be clearly seen, which forms the autogenous wear protection. In the event of wear, good material (29, 30) can subsequently be reintroduced by simple pressing for the purpose of repairing or regenerating the rollers.
Nach dem Ausführungsbeispiel der Fig. 4 ist auf die Oberfläche der Walzen (31, 32) eine Vielzahl von nach außen vorspringenden Noppenbolzen (33) aufgeschweißt. Die Noppenbolzen (33) sind in einem Gittermuster mit Vorteil derart aufgeschweißt, daß die längs Walzenmantellinien aufgebrachten Noppenbolzenreihen (34, 35) jeweils auf Lücke zueinander versetzt angeordnet sind. Dabei kann der Abstand benachbarter Noppenbolzen sowohl in derselben Noppenbolzenreihe als auch zu benachbarten Noppenbolzenreihen immer etwa gleich groß sein, so daß zwischen den einzelnen Noppenbolzen etwa gleichförmige und untereinander gleich große Zwischenräume bzw. Taschen (36) gebildet sind, die sich während des Betriebes der Walzenpresse, d. h. bei Durchführung der Gutbettzerkleinerung körnigen Gutes mit Gutmaterial füllen, wobei die Größe dieser Zwischenräume bzw. Taschen (36) so groß bemessen ist, daß das Gutmaterial während der gesamten Umdrehung der Walzen (31, 32) zum Zwecke des autogenen Verschleißschutzes in diesen Taschen (36) liegenbleibt.According to the embodiment of FIG. 4, a plurality of is on the surface of the rollers (31, 32) welded out protruding stud bolts (33). The stud bolts (33) are advantageously welded in a grid pattern in such a way that the stud bolt rows (34, 35) applied along the roll surface lines are each offset from one another with a gap. The distance between adjacent stud bolts both in the same stud stud row and to adjacent stud stud rows can always be approximately the same size, so that between the individual stud studs approximately uniform and equally large gaps or pockets (36) are formed, which are formed during the operation of the roller press , ie fill granular goods with good material when carrying out the material bed comminution, the size of these spaces or pockets (36) being dimensioned so large that the material good during the entire rotation of the rollers (31, 32) for the purpose of autogenous wear protection in these pockets (36) remains.
Fig. 5 zeigt ausschnittsweise vergrößert den Vertikalschnitt durch den Noppenbolzen (33) der Fig. 4 im aufgeschweißten Zustand. Die Unterschicht des Noppenbolzen (33) sowie aller übrigen Noppenbolzen sowie auch der Profilleisten kann aus einer auf den Walzengrundkörper aufgebrachten Ringbandage (37) und/oder aus mindestens einer Lage nebeneinanderliegender aufgeschweißter Schweißraupen bestehen. Auf jeden Fall ist das Material der Unterschicht (37) so gewählt, daß sich die Noppenbolzen (33) oder auch Profilleisten gut aufschweißen oder mittels anderer Verbindungstechniken aufbringen lassen. Die Noppenbolzen selbst können eine zylindrische, kegelstumpfförmige oder auch pyramidenförmige Konfiguration haben.Fig. 5 shows an enlarged detail of the vertical section through the stud bolt (33) of Fig. 4 in the welded state. The lower layer of the studded stud (33) and all other studded studs as well as the profiled strips can consist of an annular bandage (37) applied to the base body of the roll and / or of at least one layer of welded-on weld beads lying next to one another. In any case, the material of the lower layer (37) is selected so that the stud bolts (33) or profile strips can be welded on well or can be applied using other joining techniques. The stud bolts themselves can have a cylindrical, have a frustoconical or pyramidal configuration.
Der Werkstoff der harten verschleißbeständigen Profilleisten der Figuren 1 bis 3 sowie der Noppenbolzen (33) der Figuren 4 und 5 kann aus einer metallischen Legierung mit Hartstoffen im Gefüge, z. B. Karbiden und/oder Sonderkarbiden bestehen und/oder hochkohlenstoff- und/oder hochchromhaltig sein. Die Profilleisten der Figuren 1 bis 3 sowie auch die Noppenbolzen (33) der Figuren 4 und 5 können auch aus hartem Keramikmaterial, Sinterhartmetall oder dergleichen bestehen. Jedenfalls weist der Werkstoff der Profilleisten bzw. Noppenbolzen nach dem Aufschweißen mit Vorteil eine Kernhärte von mehr als 52 HRC (Härteprüfung nach Rockwell C) auf. Mit Vorteil weisen die Profilleisten der Figuren 1 bis 3 sowie die Noppenbolzen (33) der Figuren 4 und 5 eine Höhe von wenigstens etwa 5 mm, z. B. 10 mm, und eine Dicke (Durchmesser) von wenigstens etwa 8 mm, z. B. 15 mm, auf, bei einem Walzendurchmesser von wenigstens 500 mm.The material of the hard wear-resistant profile strips of Figures 1 to 3 and the stud bolts (33) of Figures 4 and 5 can be made of a metallic alloy with hard materials in the structure, for. B. carbides and / or special carbides exist and / or high carbon and / or high chromium. The profile strips of Figures 1 to 3 and also the stud bolts (33) of Figures 4 and 5 can also consist of hard ceramic material, cemented carbide or the like. In any case, the material of the profile strips or stud bolts after welding advantageously has a core hardness of more than 52 HRC (Rockwell C hardness test). Advantageously, the profile strips of Figures 1 to 3 and the stud bolts (33) of Figures 4 and 5 have a height of at least about 5 mm, z. B. 10 mm, and a thickness (diameter) of at least about 8 mm, e.g. B. 15 mm, on, with a roll diameter of at least 500 mm.
Die Erfindung ist besonders gut anwendbar zur Oberflächenpanzerung von Walzen von Hochdruck-Walzenpressen zur Gutbettzerkleinerung bzw. Druckbehandlung von Erzen, auch diamanthaltigen Erzen, welche besonders abrasive Güter darstellen. Das Standzeitvermögen der erfindungsgemäßen Walzenpanzerung ist auch bei solchen abrasiven Gütern hoch, weil nur die radial außenliegenden Flächen der Profilleisten bzw. Noppenbolzen einem Verschleiß unterliegen, während die übrigen Bereiche der Walzenoberfläche sowie der darauf aufgebrachten Profile durch die von selbst aufgebaute aus zusammengepreßtem Gutmaterial bestehenden Verschleißschutzschicht vor Verschleiß geschützt sind.The invention can be used particularly well for the surface armouring of rollers of high-pressure roller presses for material bed comminution or pressure treatment of ores, including ores containing diamond, which are particularly abrasive goods. The durability of the roller armor according to the invention is high even with such abrasive goods, because only the radially outer surfaces of the profile strips or stud bolts are subject to wear, while the other areas of the roller surface and the profiles applied to them are affected by the self-constructed wear protection layer consisting of compressed good material are protected against wear.
Claims (10)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4005553 | 1990-02-22 | ||
| DE4005553 | 1990-02-22 | ||
| DE4036040 | 1990-11-13 | ||
| DE4036040A DE4036040C2 (en) | 1990-02-22 | 1990-11-13 | Wear-resistant surface armor for the rollers of roller machines, especially high-pressure roller presses |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0443195A1 true EP0443195A1 (en) | 1991-08-28 |
| EP0443195B1 EP0443195B1 (en) | 1995-08-30 |
| EP0443195B2 EP0443195B2 (en) | 2000-04-05 |
Family
ID=25890409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90125365A Expired - Lifetime EP0443195B2 (en) | 1990-02-22 | 1990-12-22 | Abrasion-resistant cladding for the roller surfaces of roller machines, in particular high-pressure roller presses |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5203513A (en) |
| EP (1) | EP0443195B2 (en) |
| JP (1) | JP3176643B2 (en) |
| AT (1) | ATE127038T1 (en) |
| DE (2) | DE4036040C2 (en) |
| DK (1) | DK0443195T4 (en) |
| ES (1) | ES2076287T3 (en) |
| ZA (1) | ZA911281B (en) |
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- 1990-11-13 DE DE4036040A patent/DE4036040C2/en not_active Revoked
- 1990-12-22 DK DK90125365T patent/DK0443195T4/en active
- 1990-12-22 AT AT90125365T patent/ATE127038T1/en not_active IP Right Cessation
- 1990-12-22 DE DE59009586T patent/DE59009586D1/en not_active Expired - Fee Related
- 1990-12-22 EP EP90125365A patent/EP0443195B2/en not_active Expired - Lifetime
- 1990-12-22 ES ES90125365T patent/ES2076287T3/en not_active Expired - Lifetime
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1991
- 1991-02-20 US US07/657,992 patent/US5203513A/en not_active Expired - Lifetime
- 1991-02-21 ZA ZA911281A patent/ZA911281B/en unknown
- 1991-02-22 JP JP02887291A patent/JP3176643B2/en not_active Expired - Fee Related
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0578239A2 (en) * | 1992-07-09 | 1994-01-12 | Klöckner-Humboldt-Deutz Aktiengesellschaft | Wear-resistant roller to be used in double roll crushers, in particular high-pressure roller crushers |
| EP0578239A3 (en) * | 1992-07-09 | 1994-04-27 | Kloeckner Humboldt Deutz Ag | |
| EP0634217A1 (en) * | 1993-07-17 | 1995-01-18 | Klöckner-Humboldt-Deutz Aktiengesellschaft | Wear-resistant surface coating for rollers of high pressure roller mills and procedure for the production of such a coating |
| DE4324074A1 (en) * | 1993-07-17 | 1995-01-19 | Kloeckner Humboldt Deutz Ag | Wear-resistant surface armor for the rollers of high-pressure roller presses and method for building such a roller armor |
| US5601520A (en) * | 1993-07-17 | 1997-02-11 | Klockner-Humboldt-Deutz Ag | Wear-resistant hard-surfacing for the rolls of high-pressure roll presses |
| DE4422699A1 (en) * | 1994-06-29 | 1996-01-04 | Kloeckner Humboldt Deutz Ag | Roll for high=pressure roll press |
| EP0699479A1 (en) | 1994-09-05 | 1996-03-06 | Klöckner-Humboldt-Deutz Aktiengesellschaft | Wear resistant surface coating for rollers of high pressure roller mills for pressure milling of granular material |
| DE4431563A1 (en) * | 1994-09-05 | 1996-03-07 | Kloeckner Humboldt Deutz Ag | Wear-resistant surface armor for the rollers of high-pressure roller presses for pressure reduction of granular goods (documents for P 44 44 337.4 given) |
| EP0901828A1 (en) | 1997-09-02 | 1999-03-17 | KHD Humboldt-Wedag AG | Method and plant for closed circuit grinding of friable material |
| WO2014173877A3 (en) * | 2013-04-23 | 2014-12-24 | Thyssenkrupp Industrial Solutions Ag | Device for comminuting abrasive materials |
| US20160101425A1 (en) * | 2013-04-23 | 2016-04-14 | Thyssenkrupp Industrial Solutions Ag | Device for comminuting abrasive materials |
| RU2650906C2 (en) * | 2013-04-23 | 2018-04-18 | Тиссенкрупп Индастриал Солюшнз Аг | Device for comminuting abrasive materials |
| EP3088085A1 (en) | 2015-04-29 | 2016-11-02 | Takraf GmbH | Side sealing protection for the roller in a roller press |
| EP3088084A1 (en) | 2015-04-29 | 2016-11-02 | Takraf GmbH | Hard element for grid armoring for a roller press, method for producing the same, and roller for a roller press |
| DE102015207922A1 (en) | 2015-04-29 | 2016-11-03 | Takraf Gmbh | Hard body as grid armor for a roller press, method for its production, and role for a roller press |
| DE102015207927A1 (en) | 2015-04-29 | 2016-11-03 | Takraf Gmbh | Side wear protection for the role of a roller press |
| RU210365U1 (en) * | 2021-12-13 | 2022-04-14 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Липецкий государственный технический университет" (ЛГТУ) | Four Roll Crusher Roll |
| RU210515U1 (en) * | 2022-01-12 | 2022-04-19 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Липецкий государственный технический университет" (ЛГТУ) | Four Roll Crusher Roll |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE127038T1 (en) | 1995-09-15 |
| DE4036040C2 (en) | 2000-11-23 |
| ZA911281B (en) | 1991-11-27 |
| EP0443195B2 (en) | 2000-04-05 |
| ES2076287T3 (en) | 1995-11-01 |
| JP3176643B2 (en) | 2001-06-18 |
| EP0443195B1 (en) | 1995-08-30 |
| JPH05131154A (en) | 1993-05-28 |
| DE59009586D1 (en) | 1995-10-05 |
| DE4036040A1 (en) | 1991-08-29 |
| DK0443195T4 (en) | 2000-07-17 |
| DK0443195T3 (en) | 1995-09-25 |
| US5203513A (en) | 1993-04-20 |
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