EP0294609B1 - Roller mill - Google Patents

Roller mill Download PDF

Info

Publication number
EP0294609B1
EP0294609B1 EP88107638A EP88107638A EP0294609B1 EP 0294609 B1 EP0294609 B1 EP 0294609B1 EP 88107638 A EP88107638 A EP 88107638A EP 88107638 A EP88107638 A EP 88107638A EP 0294609 B1 EP0294609 B1 EP 0294609B1
Authority
EP
European Patent Office
Prior art keywords
roller
mill
grinding
casing
carrier
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
EP88107638A
Other languages
German (de)
French (fr)
Other versions
EP0294609A2 (en
EP0294609A3 (en
Inventor
Heinrich Dipl.-Ing. Henne
Ludger Ing.Grad. Lohnherr
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Krupp Polysius AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Krupp Polysius AG filed Critical Krupp Polysius AG
Publication of EP0294609A2 publication Critical patent/EP0294609A2/en
Publication of EP0294609A3 publication Critical patent/EP0294609A3/en
Application granted granted Critical
Publication of EP0294609B1 publication Critical patent/EP0294609B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/007Mills with rollers pressed against a rotary horizontal disc
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C2015/002Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier

Definitions

  • the invention relates to a roller mill according to the preamble of claim 1.
  • a roller mill of the type required in the preamble of claim 1 is known from EP-A-68 681 or US-A-974,180.
  • AT-B-49 174 discloses a mixing and grinding machine for grinding paints, lacquer, core sand, clay and the like, and for extracting oils and fats from the basic materials.
  • two rollers move on axes, which are guided on the one hand on columns in movable bearings and on the other hand are held in a truss piece.
  • the mixing and rubbing effect is created on the one hand by an eccentrically rotating grinding table and on the other hand by an additional shifting of the rollers to the right and left with each grinding table revolution.
  • roller mills are particularly well suited for the preparation of samples (e.g. laboratory samples), for the grinding of coal, coke, etc., for small furnaces and for other smaller grinding capacities, such as in the chemical industry.
  • the invention is therefore based on the object to provide a roller mill, in particular for smaller throughputs, of the type required in the preamble of claim 1, which is structurally relatively simple but very robust and features a structure that is less prone to failure and can be manufactured at relatively low costs.
  • roller mill according to the invention also referred to as a spring roller mill
  • This roller mill contains a mill housing 1 with a vertical axis 1 a, constructed approximately in the usual way, it being possible for this mill housing 1 to be stiffened on the outside by a type of support frame or support frame construction 2.
  • the roller mill is fixed and anchored with its mill housing 1 and the support frame 2 on a suitable foundation or a corresponding foundation frame 3.
  • a grinding plate 4 Arranged within the mill housing 1 is a grinding plate 4, which has an annular grinding path 5 on its upper side in a conventional manner and is supported on its underside by a rotatingly driven hub 6, which in turn is rotatably fixed to the upper end of the output shaft 7 of a mill drive gear 8 is attached (screwed on), which can be driven in a suitable manner, for example by an electric motor (not shown).
  • the substantially horizontally oriented grinding table 4 is thus driven in rotation during operation of the roller mill via the gear 8 and the hub 6 about the vertical housing axis 1 a, the grinding path 5 being coaxial revolves around the housing axis 1a.
  • two grinding rolls 9, 10, which are of essentially the same and conventional design, roll off and are adapted to the cross-section of the grinding track 5 on their outer circumferential side (cf. FIG. 2).
  • the two grinding rollers 9, 10 are assigned diametrically opposite areas of the grinding track 5.
  • the two grinding rollers 9, 10 are freely rotatable about their own axes 11 and 12 and essentially stationary, but are spring-mounted in the vertical direction relative to the grinding plate 4 by a common roller carrier 13.
  • the feed ground material is fed in a conventional manner centrally via a feed nozzle 14 and finished, sufficiently comminuted ground material can be removed via the outer edge of the grinding plate 4 and that this roller mill - as in solid lines shown - as a pure crushing mill or - as supplemented by a dot-dash line in FIG. 1 - as a roller mill with an immediately constructed (static or dynamic) wind sifter 15, which wind sifter is in pneumatic conveying connection with the outer peripheral region of the grinding plate 4, as is known per se is.
  • the two coaxial grinding rollers 9, 10 are rigidly connected to one another by their axes 11 and 12 and are also rigidly connected to the roller carrier 13.
  • the roller carrier 13 passes through the mill housing 1 diametrically above the grinding table 4, wherein it has a spherical cap-shaped design 16 at its one, first end 13a, with which this first End 13a is mounted in a spherical joint plain bearing shell 17, which in turn is supported by at least one spring assembly, preferably by a plurality of spring assemblies 18 in a bearing housing 19 in the manner of a shock absorber.
  • the bearing housing 19 is expediently attached (for example screwed on) to the outside of the mill housing 1 and vertically adjustable to compensate for wear.
  • the opposite second end 13b of the roller carrier 13 is guided out of the mill housing 1 in a sealed manner and is vertically movable and adjustable and is also preferably resiliently supported on the foundation frame 3 via a pull rod 20.
  • the pull rod 20 is assigned a pressure medium cylinder, preferably a hydraulic cylinder 21, which serves both for the vertical adjustability of the second roller carrier end 13b and as a spring element therefor. It goes without saying that the drawbar can also be adjusted mechanically can be, and it can be associated with a conventional mechanical spring device.
  • this second roller carrier end 13b can be sealed by an elastic seal 23 in the region of the housing leadthrough.
  • the outermost section of the second roller carrier end 13b is - as shown in FIGS. 3 and 4 - spherical cap-shaped (at 13b '), this outermost section likewise being mounted in a second ball-joint slide bearing shell 24 which is provided at the upper end of the pull rod 20 .
  • the roller carrier 13 which is formed separately in this case, is - as can be seen particularly in FIG. 3 - arranged essentially at right angles to the common (essentially horizontal) geometric axis 25 of the two grinding rollers 9, 10.
  • This grinding roller carrier 13 is designed in the region of the vertical housing axis 1a with an approximately frame-like central part 13c in such a way that a central, vertical material passage opening 26 results.
  • both grinding roller axes 11, 12 are rigidly attached to opposite (preferably flattened) outer sides of the frame-like roller carrier middle part 13c, i.e. they can be flange-mounted or directly cast on there.
  • the material passage opening 26 formed by the frame-like central part 13c offers the advantage that material to be ground supplied via the feed nozzle 14 can be supplied exactly in the middle onto the grinding plate (and a distributor plate or the like present there).
  • the two grinding rollers 9, 10 are preferably mounted on their associated axes 11, 12 via roller bearings 27, as is indicated purely schematically in FIG. 3 for the grinding roller 9.
  • These roller bearings 27 preferably have long-term grease lubrication with special roller bearing grease. While lubricating oil is used in the high-performance roller mills described above for various reasons (e.g. because of the relatively high price for special roller bearing grease), the relatively small amount of grease required for the grinding rollers 9, 10 allows the use of the special roller bearing grease, in this case also on the sealing air sealing, which is otherwise customary, can be dispensed with. An easy one Relubrication of the roller bearings 27 is easily possible via a conventional relubrication hole in the axis.
  • FIGS. 5 and 6 While a particularly preferred embodiment of the roller mill according to the invention has been explained with reference to FIGS. 1 to 4, some particularly simple training options for the roller mill will be discussed below with reference to FIGS. 5 and 6 based on the illustration in FIG. For the sake of simplicity, these further exemplary embodiments are illustrated in FIGS. 5 and 6 only in a very simplified manner in the plan, parts which are essentially the same are provided with the same reference numerals as in the previous example, so that their further explanation can be omitted.
  • FIG. 5 initially illustrates only one embodiment variant, in particular for the formation of the roller carrier 30.
  • roller carrier 30 for both grinding rollers 9, 10, which runs at right angles to the geometric grinding roller axis 25.
  • a continuous, common grinding roller axis 31 is provided for both grinding rollers 9, 10, which crosses the roller carrier 30 and is rigidly connected to it at the crossing point 32, preferably welded with the aid of additional insert pieces 33 or screwed.
  • the two ends of this grinding roller carrier can be configured and supported in the same way, as is illustrated and described in particular with reference to FIGS. 3 and 4.
  • the two grinding rollers 9, 10 roll within the mill housing 1 essentially in the same way on the grinding table grinding track 5 as in the first exemplary embodiment.
  • the two grinding rollers 9, 10 are freely rotatably mounted on a continuous, common grinding roller axis 40, which at the same time also forms the roller carrier.
  • This roller support grinding roller axis 40 can then in turn be formed and supported or supported at its outer ends in exactly the same way as is illustrated and described in the first exemplary embodiment and in particular with reference to FIGS. 3 and 4.
  • roller mill With the roller mill according to the invention, adequate damping of the grinding impacts (via grinding rollers, roller carriers and the resilient bearings at their ends) is thus ensured in any case. It can also be provided that the bearing supports for the roller carrier ends are slightly adjusted by a corresponding adjustment device when the level changes due to wear of the grinding rollers on their circumference or on the grinding plate can be what can be achieved for example by spindle devices or the like.
  • FIG. 7 finally shows a variant of the roller mill described with reference to FIGS. 1 to 4. Since this embodiment variant is constructed in the same way in most construction elements, as explained in detail above with reference to FIGS. 1 to 4, the same parts of this exemplary embodiment can be provided with the same reference symbols in FIG. 7, so that they are not described again in detail .
  • the roller mill according to FIG. 7 again contains a mill housing 1 with a vertical axis 1a, a support frame 2 firmly mounted on a foundation frame 3, the grinding table 4 driven in the same way, and grinding rollers 9, 10 rolling thereon, with rigidly connected axes 11, 12 and also a rigidly connected roller carrier 13 '.
  • This roller carrier 13 ' is essentially of the same design as in the first example according to FIGS. 1 to 4, but in the present case is guided out of the mill housing 1 in a sealed manner at its two opposite ends 13a and 13b.
  • the first roller carrier end 13'a - in a modification of the first example - at the upper end 28a of a simple support rod 28 articulated, the lower end 28b of which is articulated on the mill foundation (foundation frame 3).
  • the joints at the upper end 28a and at the lower end 28b of this support rod 28 can be designed as simple joints, for example in the form of claw joints or the like with joint pins.
  • the second roller carrier end 13'b is preferably in turn formed and supported in exactly the same manner as was explained in detail above in particular with reference to FIGS. 3 and 4, ie this second roller carrier end 13'b is due to the spherical bushing 22 led out of the mill housing 1 and reliably sealed in the area of this housing bushing by the elastic seal 23.
  • Such an elastic seal 23 can also be provided, if necessary, on the opposite side of the housing for the sealed passage of the first roller support end 13'a.
  • This embodiment variant according to FIG. 7 can also be used to construct somewhat larger roller mill designs in a particularly advantageous manner in order to introduce the forces occurring from both ends of the roller carrier 13 'directly into the foundation (foundation frame 3). While here the support rod 28 can be made essentially rigid (possibly mechanically somewhat adjustable), the second roller carrier end 13'b is in turn supported by the vertically spring-movable, adjustable pull rod 20.

Description

Die Erfindung betrifft eine Rollenmühle entsprechend dem Oberbegriff des Patentanspruches 1.The invention relates to a roller mill according to the preamble of claim 1.

Eine Rollenmühle der im Oberbegriff des Anspruches 1 vorausgesetzten Art ist durch die EP-A-68 681 oder die US-A-974,180 bekannt.A roller mill of the type required in the preamble of claim 1 is known from EP-A-68 681 or US-A-974,180.

Ferner ist durch die AT-B-49 174 eine Misch- und Verreibungsmaschine zum Verreiben von Farben, Lack, Kernsand, Lehm und dgl. sowie zur Gewinnung von Ölen und Fetten aus den Grundstoffen bekannt. Hierbei bewegen sich zwei Rollen auf Achsen, die einerseits an Säulen in verschiebbaren Lagern geführt sind und andererseits in einem Traversenstück gehalten werden. Die Misch- und Verreibungswirkung entsteht zum einen durch einen exzentrisch rotierenden Mahlteller und zum anderen durch ein zusätzliches Verschieben der Rollen nach rechts und links mit jeder Mahltellerumdrehung.Furthermore, AT-B-49 174 discloses a mixing and grinding machine for grinding paints, lacquer, core sand, clay and the like, and for extracting oils and fats from the basic materials. Here, two rollers move on axes, which are guided on the one hand on columns in movable bearings and on the other hand are held in a truss piece. The mixing and rubbing effect is created on the one hand by an eccentrically rotating grinding table and on the other hand by an additional shifting of the rollers to the right and left with each grinding table revolution.

Rollenmühlen eignen sich aufgrund ihrer Zerkleinerungsarbeit auch besonders gut für die Aufbereitung von Proben (z.B. Laborproben), für die Vermahlung von Kohle, Koks usw., für Kleinfeuerungen sowie für andere kleinere Vermahlungsleistungen, wie etwa in der chemischen Industrie.Due to their shredding work, roller mills are particularly well suited for the preparation of samples (e.g. laboratory samples), for the grinding of coal, coke, etc., for small furnaces and for other smaller grinding capacities, such as in the chemical industry.

Der Erfindung liegt daher die Aufgabe zugrunde, eine insbesondere für kleinere Durchsatzleistungen bestimmte Rollenmühle der im Oberbegriff des Anspruches 1 vorausgesetzten Art zu schaffen, die sich durch einen konstruktiv verhältnismäßig einfachen, jedoch sehr robusten und wenig störanfälligen Aufbau auszeichnet und dabei mit relativ niedrigen Kosten hergestellt werden kann.The invention is therefore based on the object to provide a roller mill, in particular for smaller throughputs, of the type required in the preamble of claim 1, which is structurally relatively simple but very robust and features a structure that is less prone to failure and can be manufactured at relatively low costs.

Diese Aufgabe wird erfindungsgemäß durch das kennzeichnende Merkmal des Anspruches 1 gelöst.This object is achieved by the characterizing feature of claim 1.

Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous refinements and developments of the invention are the subject of the dependent claims.

Die Erfindung sei nachfolgend anhand der Zeichnung näher erläutert. In dieser z.T. recht schematisch gehaltenen Zeichnung zeigen

Fig.1
eine Vertikalansicht einer ersten Ausführungsform der erfindungsgemäßen Rollenmühle,
Fig.2
eine gegenüber Fig.1 um etwa 90° gedrehte Vertikalschnittansicht der Rollenmühle,
Fig.3
eine Grundrißansicht etwa entlang der Schnittlinie III-III in Fig.1 (in vergrößertem Maßstab),
Fig.4
einen im vergrößerten Maßstab dargestellten Ausschnitt der Fig.1, insbesondere zur Erläuterung der Anordnung des Rollenträgers,
Fig.5 und 6
stark vereinfachte, schematische Grundrißdarstellungen (ähnlich Fig.3) von zwei anderen Ausführungsformen zur Halterung der Mahlrollen,
Fig.7
eine Vertikalschnittansicht einer anderen Ausführungsvariante.
The invention is explained in more detail below with reference to the drawing. Show in this drawing, which is kept quite schematic
Fig. 1
2 shows a vertical view of a first embodiment of the roller mill according to the invention,
Fig. 2
2 shows a vertical sectional view of the roller mill rotated by approximately 90 ° compared to FIG. 1,
Fig. 3
a plan view approximately along the section line III-III in Figure 1 (on an enlarged scale),
Fig. 4
2 shows a section of FIG. 1 shown on an enlarged scale, in particular to explain the arrangement of the roller carrier,
Fig. 5 and 6
highly simplified, schematic floor plans (similar to FIG. 3) of two other embodiments for holding the grinding rollers,
Fig. 7
a vertical sectional view of another embodiment.

Anhand der Fig.1 und 2 sei zunächst der allgemeine Aufbau der erfindungsgemäßen Rollenmühle (auch als Federrollenmühle bezeichnet) erläutert.1 and 2, the general structure of the roller mill according to the invention (also referred to as a spring roller mill) will first be explained.

Diese Rollenmühle enthält ein etwa in üblicher Weise aufgebautes Mühlengehäuse 1 mit vertikaler Achse 1a, wobei dieses Mühlengehäuse 1 auf seiner Außenseite durch eine Art Stützrahmen bzw. Stützrahmenkonstruktion 2 versteift sein kann. Die Rollenmühle ist mit ihrem Mühlengehäuse 1 und dem Stützrahmen 2 auf einem geeigneten Fundament bzw. einem entsprechenden Fundamentrahmen 3 fest aufgestellt und verankert.This roller mill contains a mill housing 1 with a vertical axis 1 a, constructed approximately in the usual way, it being possible for this mill housing 1 to be stiffened on the outside by a type of support frame or support frame construction 2. The roller mill is fixed and anchored with its mill housing 1 and the support frame 2 on a suitable foundation or a corresponding foundation frame 3.

Innerhalb des Mühlengehäuses 1 ist ein Mahlteller 4 angeordnet, der an seiner Oberseite in üblicher Weise eine kreisringförmige Mahlbahn 5 aufweist und über seine Unterseite von einer drehend angetriebenen Nabe 6 getragen wird, die ihrerseits drehfest auf das obere Ende der Abtriebswelle 7 eines Mühlenantriebs-Getriebes 8 aufgesetzt (aufgeschraubt) ist, das in geeigneter Weise beispielsweise von einem Elektromotor (nicht dargestellt) angetrieben werden kann. Der im wesentlichen horizontal ausgerichtete Mahlteller 4 wird somit während des Betriebes der Rollenmühle über das Getriebe 8 und die Nabe 6 um die vertikale Gehäuseachse 1a drehend angetrieben, wobei die Mahlbahn 5 koaxial zur Gehäuseachse 1a umläuft.Arranged within the mill housing 1 is a grinding plate 4, which has an annular grinding path 5 on its upper side in a conventional manner and is supported on its underside by a rotatingly driven hub 6, which in turn is rotatably fixed to the upper end of the output shaft 7 of a mill drive gear 8 is attached (screwed on), which can be driven in a suitable manner, for example by an electric motor (not shown). The substantially horizontally oriented grinding table 4 is thus driven in rotation during operation of the roller mill via the gear 8 and the hub 6 about the vertical housing axis 1 a, the grinding path 5 being coaxial revolves around the housing axis 1a.

Auf der Mahlbahn 5 des Mahltellers 4 rollen zwei im wesentlichen gleichartig und in herkömmlicher Weise ausgeführte Mahlrollen 9, 10 ab, die an ihrer Außenumfangsseite dem Querschnitt der Mahlbahn 5 angepaßt sind (vgl. Fig. 2). Die beiden Mahlrollen 9, 10 sind sich diametral gegenüberliegenden Bereichen der Mahlbahn 5 zugeordnet.On the grinding track 5 of the grinding table 4, two grinding rolls 9, 10, which are of essentially the same and conventional design, roll off and are adapted to the cross-section of the grinding track 5 on their outer circumferential side (cf. FIG. 2). The two grinding rollers 9, 10 are assigned diametrically opposite areas of the grinding track 5.

Des weiteren sind die beiden Mahlrollen 9, 10 um ihre eigene Achse 11 bzw. 12 frei drehbeweglich sowie im wesentlichen stationär, jedoch gegenüber dem Mahlteller 4 in vertikaler Richtung federbeweglich von einem gemeinsamen Rollenträger 13 gehaltert.Furthermore, the two grinding rollers 9, 10 are freely rotatable about their own axes 11 and 12 and essentially stationary, but are spring-mounted in the vertical direction relative to the grinding plate 4 by a common roller carrier 13.

Zum allgemeinen Aufbau der Rollenmühle sowie zu ihrer Betriebsweise sei noch hinzugefügt, daß das Aufgabemahlgut in herkömmlicher Weise zentral über einen Aufgabestutzen 14 zugeführt und fertiges, ausreichend zerkleinertes Mahlgut über den Außenrand des Mahltellers 4 abgeführt werden kann und daß ferner diese Rollenmühle - wie in ausgezogenen Linien dargestellt - als reine Zerkleinerungsmühle oder - wie in Fig.1 strichpunktiert ergänzt - als Rollenmühle mit unmittelbar aufgebautem (statischen oder dynamischen) Windsichter 15 ausgeführt sein kann, wobei dieser Windsichter mit dem Außenumfangsbereich des Mahltellers 4 in pneumatischer Förderverbindung steht, wie es an sich bekannt ist.For the general structure of the roller mill and its mode of operation, it should also be added that the feed ground material is fed in a conventional manner centrally via a feed nozzle 14 and finished, sufficiently comminuted ground material can be removed via the outer edge of the grinding plate 4 and that this roller mill - as in solid lines shown - as a pure crushing mill or - as supplemented by a dot-dash line in FIG. 1 - as a roller mill with an immediately constructed (static or dynamic) wind sifter 15, which wind sifter is in pneumatic conveying connection with the outer peripheral region of the grinding plate 4, as is known per se is.

Bei dieser erfindungsgemäßen Rollenmühle, die vor allem für relativ kleine Durchsatzleistungen bestimmt ist, sind die beiden koaxial zueinander ausgerichteten Mahlrollen 9, 10 durch ihre Achse 11 bzw. 12 starr miteinander sowie ebenfalls starr mit dem Rollenträger 13 verbunden. Wie sich aus Fig.1 und insbesondere aus den Fig.3 und 4 ersehen läßt, durchquert der Rollenträger 13 das Mühlengehäuse 1 oberhalb des Mahltellers 4 diametral, wobei er an seinem einen, ersten Ende 13a eine kugelkalottenförmige Ausbildung 16 aufweist, mit der dieses erste Ende 13a in einer Kugelgelenk-Gleitlagerschale 17 gelagert ist, die ihrerseits durch wenigstens ein Federpaket, vor!o zugsweise durch mehrere Federpakete 18 in einem Lagergehäuse 19 nach Art eines Stoßdämpfers abgestützt ist. Das Lagergehäuse 19 ist zweckmäßig an der Außenseite des Mühlengehäuses 1 angebaut (z.B. angeschraubt) und zum Ausgleich von Verschleiß vertikal verstellbar. Das entgegengesetzte zweite Ende 13b des Rollenträgers 13 ist abgedichtet aus dem Mühlengehäuse 1 herausgeführt und vertikal beweglich und einstellbar sowie vorzugsweise ebenfalls federnd über eine Zugstange 20 auf dem Fundamentrahmen 3 abgestützt. Der Zugstange 20 ist in diesem ersten Beispiel ein Druckmittelzylinder, vorzugsweise ein Hydraulikzylinder 21 zugeordnet, der sowohl der vertikalen Einstellbarkeit des zweiten Rollenträgerendes 13b als auch als Federelement dafür dient. Es versteht sich von selbst, daß die Zugstange auch mechanisch einstellbar sein kann, und ihr dabei eine übliche mechanische Federeinrichtung zugeordnet sein kann.In this roller mill according to the invention, which is primarily intended for relatively small throughputs, the two coaxial grinding rollers 9, 10 are rigidly connected to one another by their axes 11 and 12 and are also rigidly connected to the roller carrier 13. As can be seen from FIG. 1 and in particular from FIGS. 3 and 4, the roller carrier 13 passes through the mill housing 1 diametrically above the grinding table 4, wherein it has a spherical cap-shaped design 16 at its one, first end 13a, with which this first End 13a is mounted in a spherical joint plain bearing shell 17, which in turn is supported by at least one spring assembly, preferably by a plurality of spring assemblies 18 in a bearing housing 19 in the manner of a shock absorber. The bearing housing 19 is expediently attached (for example screwed on) to the outside of the mill housing 1 and vertically adjustable to compensate for wear. The opposite second end 13b of the roller carrier 13 is guided out of the mill housing 1 in a sealed manner and is vertically movable and adjustable and is also preferably resiliently supported on the foundation frame 3 via a pull rod 20. In this first example, the pull rod 20 is assigned a pressure medium cylinder, preferably a hydraulic cylinder 21, which serves both for the vertical adjustability of the second roller carrier end 13b and as a spring element therefor. It goes without saying that the drawbar can also be adjusted mechanically can be, and it can be associated with a conventional mechanical spring device.

Wie sich aus Fig.3 ersehen läßt, kann es zweckmäßig sein, das zweite Ende 13b des Rollenträgers 13 vertikal beweglich durch eine balige Durchführung 22 hindurch aus dem Mühlengehäuse 1 herauszuführen. Zusätzlich oder alternativ kann gemäß Fig.4 dieses zweite Rollenträgerende 13b im Bereich der Gehäusedurchführung durch eine elastische Abdichtung 23 abgedichtet sein.As can be seen from FIG. 3, it may be expedient to lead the second end 13b of the roller carrier 13 out of the mill housing 1 so that it can move vertically through a bellows passage 22. Additionally or alternatively, according to FIG. 4, this second roller carrier end 13b can be sealed by an elastic seal 23 in the region of the housing leadthrough.

Auch der äußerste Abschnitt des zweiten Rollenträgerendes 13b ist - wie Fig.3 und 4 zeigen -kugelkalottenförmig ausgebildet (bei 13b′), wobei dieser äußerste Abschnitt ebenfalls in einer zweiten Kugelgelenk-Gleitlagerschale 24 gelagert ist, die am oberen Ende der Zugstange 20 vorgesehen ist.The outermost section of the second roller carrier end 13b is - as shown in FIGS. 3 and 4 - spherical cap-shaped (at 13b '), this outermost section likewise being mounted in a second ball-joint slide bearing shell 24 which is provided at the upper end of the pull rod 20 .

Der in diesem Falle gesondert ausgebildete Rollenträger 13 ist - wie besonders in Fig.3 zu erkennen ist - im wesentlichen rechtwinklig zur gemeinsamen (im wesentlichen horizontalen) geometrischen Achse 25 der beiden Mahlrollen 9, 10 verlaufend angeordnet. Dieser Mahlrollenträger 13 ist dabei im Bereich der vertikalen Gehäuseachse 1a mit etwa rahmenartigem Mittelteil 13c derart ausgeführt, daß sich eine zentrale, vertikale Gutdurchgangsöffnung 26 ergibt.The roller carrier 13, which is formed separately in this case, is - as can be seen particularly in FIG. 3 - arranged essentially at right angles to the common (essentially horizontal) geometric axis 25 of the two grinding rollers 9, 10. This grinding roller carrier 13 is designed in the region of the vertical housing axis 1a with an approximately frame-like central part 13c in such a way that a central, vertical material passage opening 26 results.

Für jede Mahlrolle 9, 10 ist in entsprechender Anpassung eine relativ kurze, stummelartige Mahlrollenachse 11, 12 vorgesehen. Hierbei sind beide Mahlrollenachsen 11, 12 an gegenüberliegenden (vorzugsweise abgeflachten) Außenseiten des rahmenartigen Rollenträger-Mittelteiles 13c starr angebracht, d.h. sie können dort fest angeflanscht oder direkt angegossen sein. Die durch den rahmenartigen Mittelteil 13c gebildete Gutdurchgangsöffnung 26 bietet den Vorteil, daß über den Aufgabestutzen 14 zugeführtes Mahlgut genau in der Mitte auf den Mahlteller (und eine dort vorhandene Verteilerplatte oder dergleichen) zugeführt werden kann.For each grinding roller 9, 10, a relatively short, stubby grinding roller axis 11, 12 is provided in a corresponding adaptation. Here, both grinding roller axes 11, 12 are rigidly attached to opposite (preferably flattened) outer sides of the frame-like roller carrier middle part 13c, i.e. they can be flange-mounted or directly cast on there. The material passage opening 26 formed by the frame-like central part 13c offers the advantage that material to be ground supplied via the feed nozzle 14 can be supplied exactly in the middle onto the grinding plate (and a distributor plate or the like present there).

Die beiden Mahlrollen 9, 10 sind vorzugsweise über Rollenlager 27 auf ihrer zugehörigen Achse 11, 12 gelagert, wie es in Fig.3 bei der Mahlrolle 9 rein schematisch angedeutet ist. Diese Rollenlager 27 besitzen vorzugsweise eine Langzeit-Fettschmierung mit Spezialwälzlagerfett. Während nämlich bei den eingangs beschriebenen Rollenmühlen großer Leistung aus verschiedenen Gründen (z.B. wegen des verhältnismäßig hohen Preises für Spezialwälzlagerfett) Schmieröl verwendet wird, erlaubt die relativ kleine erforderliche Fettmenge bei den Mahlrollen 9, 10 die Verwendung des Spezialwälzlagerfettes, wobei in diesem Falle auch auf die sonst übliche Sperrluft-Abdichtung verzichtet werden kann. Eine einfache Nachschmierung der Rollenlager 27 ist über eine übliche Nachschmierbohrung in der Achse ohne weiteres möglich.The two grinding rollers 9, 10 are preferably mounted on their associated axes 11, 12 via roller bearings 27, as is indicated purely schematically in FIG. 3 for the grinding roller 9. These roller bearings 27 preferably have long-term grease lubrication with special roller bearing grease. While lubricating oil is used in the high-performance roller mills described above for various reasons (e.g. because of the relatively high price for special roller bearing grease), the relatively small amount of grease required for the grinding rollers 9, 10 allows the use of the special roller bearing grease, in this case also on the sealing air sealing, which is otherwise customary, can be dispensed with. An easy one Relubrication of the roller bearings 27 is easily possible via a conventional relubrication hole in the axis.

Während anhand der Fig.1 bis 4 eine besonders bevorzugte Ausführungsform der erfindungsgemäßen Rollenmühle erläutert worden ist, sei nachfolgend anhand der Fig.5 und 6 in Anlehnung an die Darstellung der Fig.3 noch auf einige besonders einfache Ausbildungsmöglichkeiten der Rollenmühle eingegangen. Der Einfachheit halber seien diese weiteren Ausführungsbeispiele in den Fig.5 und 6 nur ganz stark vereinfacht im Grundriß veranschaulicht, wobei im wesentlichen gleichartige Teile mit denselben Bezugszeichen wie im vorhergehenden Beispiel versehen sind, so daß deren nochmalige Erläuterung unterbleiben kann.While a particularly preferred embodiment of the roller mill according to the invention has been explained with reference to FIGS. 1 to 4, some particularly simple training options for the roller mill will be discussed below with reference to FIGS. 5 and 6 based on the illustration in FIG. For the sake of simplicity, these further exemplary embodiments are illustrated in FIGS. 5 and 6 only in a very simplified manner in the plan, parts which are essentially the same are provided with the same reference numerals as in the previous example, so that their further explanation can be omitted.

Fig.5 veranschaulicht zunächst nur eine Ausführungsvariante insbesondere für die Ausbildung des Rollenträgers 30. Auch in diesem Falle ist für beide Mahlrollen 9, 10 ein gesondert ausgebildeter Rollenträger 30 vorhanden, der rechtwinklig zur geometrischen Mahlrollenachse 25 verläuft. In diesem Falle (Fig.5) ist für beide Mahlrollen 9, 10 eine durchgehende, gemeinsame Mahlrollenachse 31 vorgesehen, die den Rollenträger 30 kreuzt und mit diesem an der Kreuzungsstelle 32 starr verbunden, vorzugsweise unter Zuhilfenahme zusätzlicher Einsatzstücke 33 verschweißt oder verschraubt ist. Die beiden Enden dieses Mahlrollenträgers können gleichartig ausgebildet und gelagert sein, wie es insbesondere anhand der Fig.3 und 4 veranschaulicht und beschrieben ist.5 initially illustrates only one embodiment variant, in particular for the formation of the roller carrier 30. Also in this case there is a separately designed roller carrier 30 for both grinding rollers 9, 10, which runs at right angles to the geometric grinding roller axis 25. In this case (FIG. 5), a continuous, common grinding roller axis 31 is provided for both grinding rollers 9, 10, which crosses the roller carrier 30 and is rigidly connected to it at the crossing point 32, preferably welded with the aid of additional insert pieces 33 or screwed. The two ends of this grinding roller carrier can be configured and supported in the same way, as is illustrated and described in particular with reference to FIGS. 3 and 4.

Im Beispiel der Fig.6 rollen die beiden Mahlrollen 9, 10 innerhalb des Mühlengehäuses 1 im wesentlichen gleichartig auf der Mahlteller-Mahlbahn 5 ab wie beim ersten Ausführungsbeispiel. In diesem Falle (Fig.6) sind die beiden Mahlrollen 9, 10 jedoch auf einer durchgehenden, gemeinsamen Mahlrollenachse 40 frei drehbar gelagert, die gleichzeitig auch den Rollenträger bildet. Diese Rollenträger-Mahlrollenachse 40 kann dann wiederum in genau derselben Weise an ihren äußeren Enden ausgebildet und gelagert bzw. abgestützt sein, wie es im ersten Ausführungsbeispiel und insbesondere anhand der Fig.3 und 4 veranschaulicht und beschrieben ist.In the example in FIG. 6, the two grinding rollers 9, 10 roll within the mill housing 1 essentially in the same way on the grinding table grinding track 5 as in the first exemplary embodiment. In this case (FIG. 6), however, the two grinding rollers 9, 10 are freely rotatably mounted on a continuous, common grinding roller axis 40, which at the same time also forms the roller carrier. This roller support grinding roller axis 40 can then in turn be formed and supported or supported at its outer ends in exactly the same way as is illustrated and described in the first exemplary embodiment and in particular with reference to FIGS. 3 and 4.

Bei der erfindungsgemäßen Rollenmühle ist somit in jedem Falle eine ausreichende Dämpfung der Mahlstöße (über Mahlrollen, Rollenträger und den federnden Lagerungen an ihren Enden) gewährleistet. Hierbei kann außerdem noch vorgesehen werden, daß die Lagerabstützungen für die Rollenträgerenden bei einer Niveauänderung infolge von Verschleiß der Mahlrollen an ihrem Umfang oder des Mahltellers über eine entsprechende Justiereinrichtung leicht nachgestellt werden können, was beispielsweise durch Spindeleinrichtungen oder dergleichen erzielt werden kann.With the roller mill according to the invention, adequate damping of the grinding impacts (via grinding rollers, roller carriers and the resilient bearings at their ends) is thus ensured in any case. It can also be provided that the bearing supports for the roller carrier ends are slightly adjusted by a corresponding adjustment device when the level changes due to wear of the grinding rollers on their circumference or on the grinding plate can be what can be achieved for example by spindle devices or the like.

Fig. 7 zeigt schließlich noch eine Ausführungsvariante der anhand der Fig. 1 bis 4 beschriebenen Rollenmühle. Da diese Ausführungsvariante in den meisten Konstruktionselementen gleichartig aufgebaut ist, wie es zuvor anhand dieser Fig. 1 bis 4 im einzelnen erläutert ist, können gleiche Teile dieses Ausführungsbeispieles in Fig. 7 mit denselben Bezugszeichen versehen werden, so daß sie nicht nochmals im einzelnen beschrieben werden.FIG. 7 finally shows a variant of the roller mill described with reference to FIGS. 1 to 4. Since this embodiment variant is constructed in the same way in most construction elements, as explained in detail above with reference to FIGS. 1 to 4, the same parts of this exemplary embodiment can be provided with the same reference symbols in FIG. 7, so that they are not described again in detail .

Dementsprechend enhält die Rollenmühle gemäß Fig. 7 wiederum ein Mühlengehäuse 1 mit vertikaler Achse 1a, einen auf einem Fundamentrahmen 3 fest aufgebauten Stützrahmen 2, den in gleicher Weise drehend angetriebenen Mahlteller 4, darauf abrollende Mahlrollen 9, 10, mit starr miteinander verbundenen Achsen 11, 12 sowie einem ebenfalls starr damit verbundenen Rollenträger 13′.Correspondingly, the roller mill according to FIG. 7 again contains a mill housing 1 with a vertical axis 1a, a support frame 2 firmly mounted on a foundation frame 3, the grinding table 4 driven in the same way, and grinding rollers 9, 10 rolling thereon, with rigidly connected axes 11, 12 and also a rigidly connected roller carrier 13 '.

Dieser Rollenträger 13′ ist zwar im wesentlichen gleichartig ausgebildet wie im ersten Beispiel gemäß Fig.1 bis 4, ist aber im vorliegenden Falle an seinen beiden entgegengesetzten Enden 13a und 13b abgedichtet aus dem Mühlengehäuse 1 herausgeführt. Hierbei ist das erste Rollenträgerende 13′a - in Abänderung des ersten Beispieles -am oberen Ende 28a einer einfachen Abstützstange 28 gelenkig gehaltert, deren unteres Ende 28b gelenkig am Mühlenfundament (Fundamentrahmen 3) abgestützt ist. Die Gelenke am oberen Ende 28a und am unteren Ende 28b dieser Abstützstange 28 können als einfache Gelenke, beispielsweise in Form von Klauengelenken oder dergleichen mit Gelenkzapfen ausgeführt sein. Dagegen ist das zweite Rollenträgerende 13′b vorzugsweise wiederum in genau der gleichen Weise ausgebildet und abgestützt, wie es insbesondere anhand der Fig. 3 und 4 weiter oben im einzelnen erläutert worden ist, d. h. dieses zweite Rollenträgerende 13′b ist durch die ballige Durchführung 22 aus dem Mühlengehäuse 1 herausgeführt und im Bereich dieser Gehäusedurchführung durch die elastische Abdichtung 23 zuverlässig abgedichtet. Eine solche elastische Abdichtung 23 kann im übrigen im Bedarfsfalle auch auf der gegenüberliegenden Gehäuseseite zum abgedichteten Hindurchführen des ersten Rollenträgerendes 13′a vorgesehen sein.This roller carrier 13 'is essentially of the same design as in the first example according to FIGS. 1 to 4, but in the present case is guided out of the mill housing 1 in a sealed manner at its two opposite ends 13a and 13b. Here, the first roller carrier end 13'a - in a modification of the first example - at the upper end 28a of a simple support rod 28 articulated, the lower end 28b of which is articulated on the mill foundation (foundation frame 3). The joints at the upper end 28a and at the lower end 28b of this support rod 28 can be designed as simple joints, for example in the form of claw joints or the like with joint pins. In contrast, the second roller carrier end 13'b is preferably in turn formed and supported in exactly the same manner as was explained in detail above in particular with reference to FIGS. 3 and 4, ie this second roller carrier end 13'b is due to the spherical bushing 22 led out of the mill housing 1 and reliably sealed in the area of this housing bushing by the elastic seal 23. Such an elastic seal 23 can also be provided, if necessary, on the opposite side of the housing for the sealed passage of the first roller support end 13'a.

Durch diese Ausführungsvariante gemäß Fig. 7 können in vorteilhafter Weise auch etwas größere Rollenmühlen-Ausführungen konstruktiv besonders günstig ausgeführt sein, um die auftretenden Kräfte von beiden Enden des Rollenträgers 13′ direkt in das Fundament (Fundamentrahmen 3) einzuleiten. Während hierbei die Abstützstange 28 im wesentlichen starr (gegebenenfalls mechanisch etwas einstellbar) ausgeführt sein kann, erfolgt die Abstützung des zweiten Rollenträgerendes 13′b wiederum durch die vertikal federbewegliche, einstellbare Zugstange 20.This embodiment variant according to FIG. 7 can also be used to construct somewhat larger roller mill designs in a particularly advantageous manner in order to introduce the forces occurring from both ends of the roller carrier 13 'directly into the foundation (foundation frame 3). While here the support rod 28 can be made essentially rigid (possibly mechanically somewhat adjustable), the second roller carrier end 13'b is in turn supported by the vertically spring-movable, adjustable pull rod 20.

Bereits bei der Erläuterung des ersten Ausführungsbeispieles ist zum allgemeinen Aufbau der Rollenmühle darauf hingewiesen worden, daß unmittelbar auf das Mühlengehäuse 1 ein geeigneter (statischer oder dynamischer) Windsichter 15 aufgebaut sein kann. Dies ist auch im Falle der Fig. 7 der Fall, in der der Winsichter 15 in ausgezogenen Linien dargestellt ist. Bei dieser Art Rollenmühle mit aufgebautem Windsichter ist dann zweckmäßig der Außenumfang des Mahltellers 4 von einer ringförmigen Sicht- und Transportluftzuführung 29 umgeben, an die eine diese Sichtluft- und Transportluft (Pfeile 29b) heranführende Luftleitung (29a) in an sich bekannter Weise angeschlossen ist. Hierbei steht dann der Windsichter 15 mit der Luftzuführung 29 im Außenumfangsbereich des Mahltellers 4 in pneumatischer Förderverbindung, wie es durch die gestrichelten Pfeile 29b angedeutet ist.Already in the explanation of the first embodiment has been pointed out to the general structure of the roller mill that a suitable (static or dynamic) wind sifter 15 can be built directly on the mill housing 1. This is also the case in FIG. 7, in which the winch sifter 15 is shown in solid lines. In this type of roller mill with a built-in air classifier, the outer circumference of the grinding plate 4 is then appropriately surrounded by an annular view and transport air supply 29, to which an air line (29a) leading this view air and transport air (arrows 29b) is connected in a manner known per se. In this case, the air classifier 15 is in a pneumatic conveying connection with the air supply 29 in the outer peripheral region of the grinding plate 4, as is indicated by the dashed arrows 29b.

Claims (15)

  1. Roller mill, containing
    a) a mill casing (1) with a vertical axis (1a),
    b) a grinding table (4) which is arranged inside the mill casing, has a circular grinding track (5), is rotatable about the vertical casing axis and is supported on its underside by a collar (6) which is driven in rotary motion,
    c) two diametrically opposed grinding rollers (9, 10) which roll on the grinding table (4), are freely rotatably movable about their own spindles (11, 12, 31, 40) and substantially stationary, but are retained by a roller carrier (13, 13') so as to be vertically resiliently movable with respect to the grinding table (4),
    d) the two grinding rollers (9, 10) which are aligned coaxially with respect to one another being connected by their spindles (11, 12, 31, 40) rigidly to one another and to the roller carrier (13, 13');


    characterised by the following features:
    e) the roller carrier (13, 13') which passes diametrally through the mill casing (1) above the grinding table (4) is led out of the mill casing (1) and sealed at at least one end (13b, 13'b) and is supported so as to be vertically movable and adjustable.
  2. Roller mill as claimed in claim 1, characterised in that the roller carrier (13, 30, 40) is mounted flexibly and resiliently at its first end (13a) on the mill casing (1) and on its diametrically opposite second end (13b) is led out of the mill casing and sealed and supported.
  3. Roller mill as claimed in claim 2, characterised in that the first end (13a) of the roller casing (13) is constructed like a spherical segment and is mounted in a ball joint plain bearing race which in its turn is supported by at least one set of springs (18) in a bearing housing (19).
  4. Roller mill as claimed in claim 1, characterised in that at least one end (13b, 13'b) of the roller carrier (13, 13') is led through a convex passage (22) out of the mill casing (1) and in the region of this casing passage is sealed by an elastic seal (23).
  5. Roller mill as claimed in claim 4, characterised in that the outermost section of the end (13b, 13'b) of the roller casing led out of the mill housing (1) is supported by a ball joint bearing (13b', 24) on the upper end of an adjustable sprung pull rod (20) the lower end of which can be anchored on the mill base (30.
  6. Roller mill as claimed in claim 5, characterised in that the pull rod is mechanically adjustable.
  7. Roller mill as claimed in claim 5, characterised in that a pressure medium cylinder (21) is associated with the pull rod (20) as an adjustment and spring element.
  8. Roller mill as claimed in claim 1, characterised in that the two grinding rollers (9, 10) are mounted so as to be freely rotatable on a continuous common grinding roller spindle (40) which at the same time forms the roller carrier.
  9. Roller mill as claimed in claim 1, characterised in that the separately constructed roller carrier (13, 30) runs at right angles to the grinding roller spindle (25).
  10. Roller mill as claimed in claim 9, characterised in that a continuous common grinding roller spindle (31) which crosses the roller carrier (30) and is rigidly connected thereto at the crossing point (32) is provided for both grinding rollers (9, 10).
  11. Roller mill as claimed in claim 9, characterised in that the roller carrier (13) is constructed like a frame in the region of the vertical casing axis (1a) and has a central vertical opening (26) for the material to pass through, a short stump-like grinding roller spindle (11, 12) is provided for each grinding roller (9, 10), and both grinding roller spindles (11, 12) are rigidly mounted on opposing outer faces of the frame-like central part (13c) of the roller carrier.
  12. Roller mill as claimed in claim 1, characterised in that the grinding rollers (9, 10) are mounted via roller bearings (27) on their appertaining spindles (11, 12) and the roller bearings have a long-term grease lubrication with special roller bearing grease.
  13. Roller mill as claimed in claim 1, characterised in that the grinding table collar (6) is placed so as to be fixed against rotation on the upper end of the drive shaft of a mill drive gear (8).
  14. Roller mill as claimed in claim 4, characterised in that the roller carrier (13') is led out of the mill casing (1) and sealed at both its opposing ends (13'a, 13'b), its first end (13'a) being flexibly retained on the upper end (28a) of a simple stay rod (28) the lower end (28b) of which is flexibly supported on the mill bedplate (3), whilst the second end (13'b) of the roller carrier is led out of the mill casing via the convex passage (22) and the elastic seal (23).
  15. Roller mill as claimed in claim 1, characterised in that the outer periphery of the grinding table (4) is surrounded by an annular sifting and transport air supply (28) connected to an air pipe (29a), and an air separator (15) which is in pneumatic conveying connection with the air supply (29) is built directly onto the mill casing (1).
EP88107638A 1987-06-04 1988-05-11 Roller mill Expired - Lifetime EP0294609B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3718781 1987-06-04
DE19873718781 DE3718781A1 (en) 1987-06-04 1987-06-04 ROLL MILL

Publications (3)

Publication Number Publication Date
EP0294609A2 EP0294609A2 (en) 1988-12-14
EP0294609A3 EP0294609A3 (en) 1989-11-29
EP0294609B1 true EP0294609B1 (en) 1992-01-02

Family

ID=6329082

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88107638A Expired - Lifetime EP0294609B1 (en) 1987-06-04 1988-05-11 Roller mill

Country Status (3)

Country Link
US (1) US4909450A (en)
EP (1) EP0294609B1 (en)
DE (2) DE3718781A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5039021A (en) * 1990-04-23 1991-08-13 Foster Wheeler Energy Corporation Pulverizing mill having external loading arm mehcanism
DE4209459A1 (en) * 1992-03-24 1993-09-30 Krupp Polysius Ag Roller mill
DE4209458A1 (en) * 1992-03-24 1993-09-30 Krupp Polysius Ag Roll grinding mill for coal, cement etc. - with roll supports able to rotate in two mutually perpendicular planes thereby reducing radial vibration during grinding process
US6213415B1 (en) 1999-09-13 2001-04-10 W.R. Grace & Co.-Conn. Process for improving grinding of cement clinker in mills employing rollers
CA2398266C (en) * 2000-01-28 2009-02-03 Pacific Edge Holdings Pty. Ltd. Process for upgrading low rank carbonaceous material
GB2420992B (en) * 2004-04-19 2008-05-21 William Graham Bell Industrial apparatus
DE102004042316B4 (en) * 2004-09-01 2008-11-20 Siemens Ag Spindle bearing device
DE102008010652B3 (en) * 2008-02-22 2009-11-05 Polysius Ag Power transmission system and roller mill
WO2010055437A1 (en) * 2008-11-13 2010-05-20 Flsmidth A/S A roller mill for grinding particulate material
US20110272512A1 (en) * 2009-01-30 2011-11-10 Flsmidth A/S Roller Mill
DE102011014592A1 (en) 2011-03-21 2012-09-27 Loesche Gmbh roller mill
US10758912B1 (en) * 2019-04-11 2020-09-01 Gene P. Guthmiller Material processing system

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US563145A (en) * 1896-06-30 duffield
US522982A (en) * 1894-07-17 aordon
DE233990C (en) *
DE134384C (en) * 1901-04-23 1902-08-28
US974180A (en) * 1909-07-13 1910-11-01 Raymond C Penfield Dry-pan.
AT49174B (en) * 1910-03-07 1911-07-25 Vulkan Koeln Ag Mixing and triturating machine.
FR430377A (en) * 1910-06-11 1911-10-14 Michel David Mortar mixer
GB1507010A (en) * 1976-07-27 1978-04-12 Smidth & Co As F L Roller mill
US4072276A (en) * 1977-04-07 1978-02-07 Foster Wheeler Energy Corporation Pulverizer with caster roller assembly
GB2100617A (en) * 1981-06-26 1983-01-06 Smidth & Co As F L Edge-runner mill
GB2118457B (en) * 1982-04-13 1985-05-22 Smidth & Co As F L Edge runner mills
CH658801A5 (en) * 1982-10-29 1986-12-15 Maag Zahnraeder & Maschinen Ag ROLL BOWL MILL.
GB2193115A (en) * 1986-08-01 1988-02-03 Smidth & Co As F L Roller mill

Also Published As

Publication number Publication date
DE3718781A1 (en) 1988-12-15
EP0294609A2 (en) 1988-12-14
DE3867320D1 (en) 1992-02-13
EP0294609A3 (en) 1989-11-29
US4909450A (en) 1990-03-20

Similar Documents

Publication Publication Date Title
EP0294609B1 (en) Roller mill
DE2721706A1 (en) CARDAN JOINT AND JOINT CROSS FOR IT
DE3313959C2 (en) Tube mill for grinding natural and artificial raw materials, especially for the cement industry
DE3815218A1 (en) AIRFLOW MACHINE
DE19511054C2 (en) Drive for a folding knife in a folding drum
EP0658379B1 (en) Roller mill
DE3409710A1 (en) Roller mill
DE3323718C2 (en)
DE102013017134A1 (en) Device for processing pourable feed
DE10144974B4 (en) Roll stand for rolling rod or tubular material
EP0256147A1 (en) Disc mill
DE2831142A1 (en) DEFLECTION ADJUSTING ROLLER
DE2245134A1 (en) SWIVEL JOINT FOR HARSH OPERATING CONDITIONS
EP1321180A2 (en) Internal mixer
EP2999542A1 (en) Grinding roller
DE1965263B2 (en) SEALING DEVICE ON A CONTINUOUSLY WORKING DEWATERING PRESS
DE1802400A1 (en) Gyro crusher
DE3641334C2 (en) Crushing drum
DE3049080A1 (en) Paper making pressure roller - has swivel bearings at ends to allow bend adjustment
DE2918199A1 (en) CENTRAL MOTION TRANSMISSION UNIT FOR BICYCLES
DE2914156A1 (en) Roller-type clay mill - has setting roller supported by bearings in eccentric washers in bearing housings
DE106932C (en)
DE2327213A1 (en) DEVICE FOR CONVERTING A ROTATING MOTION INTO A STRAIGHT MOVEMENT DUE TO A ROLLING PROCESS ON A THREADED SPINDLE, CALLED ROLLING SPINDLE
DE2736437C3 (en) Lubricating device for adjacent crank pin bearings of the crankshaft of a cold pilger rolling mill
DE6947529U (en) CENTRIFUGAL RING ROLLER MILL.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE ES FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE ES FR GB IT

RHK1 Main classification (correction)

Ipc: B02C 15/14

17P Request for examination filed

Effective date: 19900116

17Q First examination report despatched

Effective date: 19910611

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19920102

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19920102

Ref country code: FR

Effective date: 19920102

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3867320

Country of ref document: DE

Date of ref document: 19920213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19920511

EN Fr: translation not filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19920511

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19930202