EP0661099B1 - Milling roller - Google Patents
Milling roller Download PDFInfo
- Publication number
- EP0661099B1 EP0661099B1 EP94118707A EP94118707A EP0661099B1 EP 0661099 B1 EP0661099 B1 EP 0661099B1 EP 94118707 A EP94118707 A EP 94118707A EP 94118707 A EP94118707 A EP 94118707A EP 0661099 B1 EP0661099 B1 EP 0661099B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- breaking
- jacket
- grinding
- roller jacket
- 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
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Classifications
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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
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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
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/004—Shape or construction of rollers or balls
- B02C15/005—Rollers or balls of composite construction
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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
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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
- B02C4/42—Driving mechanisms; Roller speed control
Definitions
- the invention relates to a grinding roller for roller mills, roller mills or smoothing mills according to the preamble of the claim 1 and a manufacturing method for such Grinding roller.
- Known grinding rollers for roller or roller mills have in usually a radially inner body and one radially outer roller body.
- the concept of radial inner body includes in this context also a base coat that attaches to the body can be.
- the radially outer roller body must be highly wear-resistant be. This is usually caused by extremely hard, but at the same time materials that are very sensitive to brittle fracture achieved that are shed. In many cases these materials are also subjected to a special heat treatment subjected.
- roller mill with grinding rollers the roller shell of individual segments is composed in DE 38 33 614 A1. Serve to fix the segments Clamping plates that cover the end faces of the segments completely cover and flush with the outer peripheral surface complete the segments.
- the invention has for its object to provide a grinding roller and a method for producing a grinding roller, which has a particularly long service life and a low risk of repair and can be produced with particularly little effort and thus inexpensive.
- the object is achieved according to the invention by the characterizing features of claim 1 and with respect of the manufacturing process by the characteristic Features of claim 14 solved.
- a basic idea of the invention is the manufacturing-related Advantages of a one-piece roll shell, which as a radially outer roller body a radially inner base body or on a base jacket the base body is arranged and fastened, with the advantages of a segmented operation to connect manufactured roller shell and under Avoiding the manufacturing costs of a segmented manufactured roll shell a one-piece, first to produce roll shell that can be segmented in the milling process.
- a one-piece roll shell for example a chilled cast iron ring, with the aid of a holding device fixable on a radially inner base body.
- a holding device fixable on a radially inner base body.
- the segmentable roll shell in particular a brittle material, such as Ni-hard, ceramic or chrome chilled cast iron or similar hard material chosen without measurable elongation at break.
- the one-piece manufactured roll portion is still such with a Holding device on the radially inner base body attached that the optionally formed roll shell break segments are also securely attached and a smooth one Operation is guaranteed.
- the Roller jacket When a casting material with extremely high wear resistance and is used without residual elasticity, the Roller jacket exactly and precisely on one or more Break predetermined breaking points and become a broken or torn chilled cast iron ring or to a segmented Be roll shell. Once roll shell break segments are formed are, the residual voltages are almost completely off the structure eliminated. Because of a clamp bracket a falling of the fracture segments and thereby Consequential damage such as a shutdown, repairs or the like avoided.
- Another advantage is that it is much harder and more wear-resistant cast materials can be used and that there is a risk of an uncontrolled break of a one-piece roller jacket a total damage to the roller jacket itself and consequential damage to other grinding rollers falling fragments arise, largely excluded is.
- the cost-effective production is also advantageous the grinding roller according to the invention or the roller shell, which is first cast as a one-piece chilled iron ring and an inner, preferably circular cylindrical outer surface and an outer surface with rolling or grinding surface having.
- the one-piece chilled cast iron ring can be used without interruption the joining surface can be rotated. Because the cut surface Tungsten carbide or ceramic inserts can be used throughout be used so that one for segmented Single-segment machining necessary for roller shells can be omitted. This makes it extremely simple and inexpensive manufacture of the roll shell and the grinding roller possible.
- Inner notches on the are preferred as predetermined breaking points ground inside surface, which with appropriate Radial outward stress up to the grinding or rolling surface break and roll shell fracture segments with complementary Form fracture surfaces. Because the roll shell break segments by a holding device, in particular by a Clamping and holding device, are held in a reliable manner, can be achieved with a particularly simple means Fractional segmentation of the milling process without adverse effects Downtimes and maintenance work continued will.
- a holding device comprises in an appropriate training a detachably arranged on an end face of the grinding roller Clamping ring made with a screw connection with a claw ring, which on the opposite Shaped on the radially inner base body is a clamp bracket of both the one-piece roll shell as well as the roll shell break segments formed guaranteed.
- the clamping ring is expedient in the case of a grinding roller for roller mills on the inner facing the mill axis Arranged end face and formed in several parts to a simple and easily accessible fastening of the roller shell on one swung out of the mill housing, for example To enable roller base body.
- the clamping ring consists of individual clamping pieces, each assigned to a possible roll shell break segment are causing a segment to loosen and fall off is prevented. All clamping pieces have shapes on that in complementary recesses of the intervene in segmentable roller jacket.
- the molded, one-piece claw ring is with a rotation lock provided by a fixation in the circumferential direction takes place and a turning of the roll shell break segments regardless of the radially inner body can be prevented.
- a particularly simple and effective anti-rotation device is achieved with cams that are radial and axial from the claw ring stand out and in cam recordings of the segmentable Intervene in the roller jacket.
- the predetermined breaking points which on the inner lateral surface as Internal notches and possibly also on the outer surface are formed as outer notches, expediently suffice over the entire axial width of the respective Lateral surface and up to the adjacent end faces of the Roll shell.
- At a distance from the preferred 10 - 20 mm deep and 5 mm wide inner notches are the recesses of the Fastening areas of the roller shell arranged to a secure fastening and holding of the roll shell break segments to ensure.
- Figure 1 is a grinding roller for a roller mill in the area a radially outer roller body 5 is shown, the on a radially inner base 3 of the grinding roller is attached.
- a radially outer roller body 5 is a one-piece manufactured under certain operating conditions in Fracture-breaking roller jacket 7 provided the over a circular cylindrical inner surface 15 bears against the base body 3 and reliable is fixed. With such a disposition over a assembly play is necessary.
- segmentable roll shell 7 which is cast as a chill ring and then in a particularly simple and inexpensive The process has been turned, has an outer, surface plane Shell surface 11 with a rolling or grinding surface 9, which in the installed state almost parallel to a grinding plate (not shown) is arranged.
- a holding device 20 which has a clamping ring 22 with a Includes hammer screw 27, both holds the one piece Roll shell 7 produced as well as if necessary resulting roll shell break segments and clamps them elastically against a claw ring 24 which is radially on the opposite Face of the radially inner Base body 3 is formed.
- the one from individual clamps existing clamping ring 22 has approximately V-shaped positive Formations 23 on that in complementary negative Recesses 13 of a fastening area 16 of the roll shell 7 intervene.
- Opposite educated Recesses 17 in an end fastening area 14 of the segmentable roll shell 7 are used for Receiving the claw ring 24.
- the recesses 13, 17 in End faces 6, 4 of the roll shell 7 are each in one defined radial distance from the inner notches 12 ground predetermined breaking points 10 are formed.
- a cam 31 is used together with a cam receptacle 18 as a rotation lock or to fix the roll shell break segments in the circumferential direction, as in particular from the Top view according to arrow A in Figure 2 emerges.
- a resilient or elastic clamping bracket is advantageous the segmentable roll shell 7 or the roll shell break segments, by a disc spring 26 and a Nut 28 in the clamping ring 22 is accessible.
Landscapes
- Food Science & Technology (AREA)
- Engineering & Computer Science (AREA)
- Crushing And Grinding (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Crushing And Pulverization Processes (AREA)
- Adjustment And Processing Of Grains (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Turning (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Polarising Elements (AREA)
Abstract
Description
Die Erfindung betrifft eine Mahlwalze für Wälzmühlen, Walzenmühlen oder Glättwalzwerke gemäß Oberbegriff des Anspruchs 1 sowie ein Herstellungsverfahren für eine derartige Mahlwalze.The invention relates to a grinding roller for roller mills, roller mills or smoothing mills according to the preamble of the claim 1 and a manufacturing method for such Grinding roller.
Bekannte Mahlwalzen für Wälz- oder Walzenmühlen weisen in der Regel einen radial innenliegenden Grundkörper und einen radial außenliegenden Walzenkörper auf. Der Begriff des radial innenliegenden Grundkörpers umfaßt in diesem Zusammenhang auch einen Basismantel, der auf dem Grundkörper befestigt sein kann.Known grinding rollers for roller or roller mills have in usually a radially inner body and one radially outer roller body. The concept of radial inner body includes in this context also a base coat that attaches to the body can be.
An dem radial außenliegenen Walzenkörper ist eine Abrollfläche ausgebildet, welche eine mit einem rotierenden Mahlteller oder einer weiteren Mahlwalze zusammenwirkende Mahlfläche bildet.There is a rolling surface on the radially outer roller body trained which one with a rotating Interacting grinding plate or another grinding roller Grinding surface forms.
Der radial außenliegende Walzenkörper muß hochverschleißfest sein. Dies wird üblicherweise durch extrem harte, aber gleichzeitig stark sprödbruchempfindliche Werkstoffe erreicht, die vergossen werden. In vielen Fällen werden diese Werkstoffe zusätzlich einer speziellen Wärmebehandlung unterzogen.The radially outer roller body must be highly wear-resistant be. This is usually caused by extremely hard, but at the same time materials that are very sensitive to brittle fracture achieved that are shed. In many cases these materials are also subjected to a special heat treatment subjected.
Aus der US-A 4,232,834 sind derartige Mahlwalzen einer Walzenmühle beschrieben. Als radial außenliegender Walzenkörper ist ein Walzenmantel mit Hilfe einer Halteeinrichtung an dem radial innenliegenden Grundkörper befestigt. From US-A 4,232,834 such grinding rollers are one Roller mill described. As a radially outer roller body is a roll shell with the help of a holding device attached to the radially inner base body.
Es hat sich jedoch gezeigt, daß aus diesen Werkstoffen hergestellte Walzenkörper stark bruchgefährdet sind. Wesentliche Ursachen dafür sind interne Gußspannungen durch ungleichmäßiges Abkühlen von außen nach innen, Gefügespannungen aufgrund von unkontrollierten Wärmebehandlungen, Aufkeil- bzw. Schrumpfspannungen durch mechanisches Fügen über konische Klemmsitze und auftretende Biegebeanspruchung bei Fügung über zylindrische Sitze mit notwendigem Montagespiel. Weitere Einflußfaktoren sind rasch schwankende Temperaturen während des Mahlprozesses und Arbeitsspannungen, insbesondere bei Mahlgut, welches hohe spezifische Mahldrücke erfordert, wie z.B. bei Zement, Schlacke und beim Vorschroten von Zement. In der Regel wirken mehrere der angeführten Faktoren zusammen.However, it has been shown that made from these materials Roller bodies are very likely to break. Essentials The causes for this are internal casting tensions due to uneven Cooling from the outside in, structural tensions due to uncontrolled heat treatments, Wedge or shrinkage stresses due to mechanical joining via conical clamp seats and occurring bending stress when fitting over cylindrical seats with necessary assembly play. Other influencing factors are rapidly fluctuating Temperatures during the grinding process and working voltages, especially for regrind, which has high specific Grinding pressures required, e.g. for cement, slag and for Regulating cement. As a rule, several of the listed act Factors together.
Es ist bekannt, zur Vermeidung von Brüchen und daraus resultierenden Sekundärschäden, wie z.B. durch herabfallende Bruchteile verursachte Folgeschäden, segmentierte radial außenliegende Walzenkörper einzusetzen.It is known to avoid breakages and resulting ones Secondary damage, e.g. by falling down Fractions caused consequential damage, segmented radially use external roller body.
Eine Walzenmühle mit Mahlwalzen, deren Walzenmantel aus einzelnen Segmenten zusammengesetzt ist, ist in der DE 38 33 614 A1 beschrieben. Zur Fixierung der Segmente dienen Klemmplatten, welche die Stirnseiten der Segmente vollständig abdecken und bündig mit der äußeren Umfangsfläche der Segmente abschließen.A roller mill with grinding rollers, the roller shell of individual segments is composed in DE 38 33 614 A1. Serve to fix the segments Clamping plates that cover the end faces of the segments completely cover and flush with the outer peripheral surface complete the segments.
Nachteilig ist dabei die kostenintensive Herstellung derartig segmentierter Walzenkörper. Da jedes einzelne Segment für sich sowohl bezüglich seiner Auflagefläche als auch hinsichtlich seiner beiden Kontaktflächen zu den Nachbarsegmenten mit höchster Genauigkeit bearbeitet werden muß, wirkt sich der erforderliche Zeitaufwand nachteilig auf die Herstellungskosten aus.The disadvantage is the cost-intensive production of such segmented roller body. Because every single segment for itself both in terms of its contact surface and in terms of its two contact surfaces to the neighboring segments must be processed with the highest accuracy, the time required adversely affects Manufacturing costs.
Der Erfindung liegt die Aufgabe zugrunde, eine Mahlwalze und ein Verfahren zur Herstellung einer Mahlwalze zu schaffen, welche besonders hohe Standzeiten und ein geringes Reparaturrisiko aufweist und mit einem besonders geringen Aufwand und somit kostengünstig hergestellt werden kann.The invention has for its object to provide a grinding roller and a method for producing a grinding roller, which has a particularly long service life and a low risk of repair and can be produced with particularly little effort and thus inexpensive.
Bezüglich der Mahlwalze wird die Aufgabe erfindungsgemäß
durch die kennzeichnenden Merkmale des Anspruchs 1 und bezüglich
des Herstellungsverfahrens durch die kennzeichnenden
Merkmale des Anspruchs 14 gelöst.With regard to the grinding roller, the object is achieved according to the invention
by the characterizing features of claim 1 and with respect
of the manufacturing process by the characteristic
Features of
Zweckmäßige und vorteilhafte Ausgestaltungen sind in der Figurenbeschreibung und in den Unteransprüchen beschrieben.Appropriate and advantageous refinements are in the Description of the figures and described in the subclaims.
Ein Grundgedanke der Erfindung ist es, die herstellungsbedingten Vorteile eines einteilig hergestellten Walzenmantels, welcher als radial außenliegender Walzenkörper auf einem radial innenliegenden Grundkörper bzw. auf einem Basismantel des Grundkörpers angeordnet und befestigt wird, mit den sich im Betrieb erweisenden Vorteilen eines segmentiert hergestellten Walzenmantels zu verbinden und unter Vermeidung der herstellungsbedingten Kosten eines segmentiert hergestellten Walzenmantels einen einteiligen, erst im Mahlprozeß segmentierbaren Walzenmantel herzustellen.A basic idea of the invention is the manufacturing-related Advantages of a one-piece roll shell, which as a radially outer roller body a radially inner base body or on a base jacket the base body is arranged and fastened, with the advantages of a segmented operation to connect manufactured roller shell and under Avoiding the manufacturing costs of a segmented manufactured roll shell a one-piece, first to produce roll shell that can be segmented in the milling process.
Erfindungsgemäß ist ein einteilig hergestellter Walzenmantel, beispielsweise ein Hartgußring, mit Hilfe einer Halteeinrichtung an einem radial innenliegenden Grundkörper fixierbar. Um nach der Herstellung des einteiligen Walzenmantels und dessen Befestigung auf dem Grundkörper zu einem segmentierten, relativ bruchsicheren Walzenmantel zu gelangen, sind Sollbruchstellen in dem einteilig hergestellten Walzenmantel eingearbeitet, die an definierten und während der Konstruktion einer Mahlwalze bereits vorgegebenen Stellen eingearbeitet, insbesondere eingeschliffen werden. An diesen Sollbruchstellen, die bevorzugt als Sollbruchkerben und quer zur Abrollrichtung einer Mahlwalze bzw. achsparallel zu einer Mahlwalzenachse eingebracht sind, wird der einteilig hergestellte Walzenmantel gezielt an einer oder an mehreren Stellen in radialer Richtung brechen und paßgenaue Walzenmantel-Bruchsegmente bilden, wenn die Mahlwalze bzw. der Walzenmantel einer entsprechenden Beanspruchung ausgesetst ist und innere bzw. von außen eingetragene Spannungen die Bruchfestigkeit des verwendeten Materials überschreiten. Gemäß der Erfindung wird als Material für den segmentierbaren Walzenmantel insbesondere ein Sprödmaterial, wie Ni-hard, Keramik oder Chrom-Hartguß oder ähnliches Hartmaterial ohne meßbare Bruchdehnung gewählt. Der einteilig hergestellte Walzenmanteil wird weiterhin derart mit einer Halteeinrichtung an dem radial innenliegenden Grundkörper befestigt, daß die gegebenenfalls gebildeten Walzenmantel-Bruchsegmente ebenfalls sicher befestigt sind und ein reibungsloser Betriebsablauf gewährleistet ist.According to the invention is a one-piece roll shell, for example a chilled cast iron ring, with the aid of a holding device fixable on a radially inner base body. In order after the manufacture of the one-piece roll shell and its attachment to the base body into one to get segmented, relatively unbreakable roller jacket, are predetermined breaking points in the one-piece Roll jacket incorporated, which at defined and during the construction of a grinding roller already predetermined places incorporated, especially ground in. On these predetermined breaking points, which are preferred as predetermined breaking notches and transverse to the rolling direction of a grinding roller or axially parallel are introduced to a grinding roller axis, the one-piece roll jacket targeted at one or break in several places in the radial direction and fit precisely Roll shell breakage segments form when the grinding roll or the roll shell of a corresponding load is exposed and internal or external tensions exceed the breaking strength of the material used. According to the invention is used as a material for the segmentable roll shell, in particular a brittle material, such as Ni-hard, ceramic or chrome chilled cast iron or similar hard material chosen without measurable elongation at break. The one-piece manufactured roll portion is still such with a Holding device on the radially inner base body attached that the optionally formed roll shell break segments are also securely attached and a smooth one Operation is guaranteed.
Wenn ein Gußmaterial mit einer extrem hohen Verschleißfestigkeit und ohne Restelastizität eingesetzt wird, wird der Walzenmantel exakt und paßgenau an einer oder mehreren Sollbruchstellen brechen und zu einem durchgebrochenen oder durchgerissenen Hartgußring oder zu einem segmentierten Walzenmantel werden. Sobald Walzenmantel-Bruchsegmente gebildet sind, sind die Restspannungen nahezu vollständig aus dem Gefüge eliminiert. Aufgrund einer Klemmhalterung wird ein Herunterfallen der Bruchsegmente und dadurch bedingte Folgeschäden wie ein Betriebsstillstand, Reparaturen oder dergleichen vermieden.When a casting material with extremely high wear resistance and is used without residual elasticity, the Roller jacket exactly and precisely on one or more Break predetermined breaking points and become a broken or torn chilled cast iron ring or to a segmented Be roll shell. Once roll shell break segments are formed are, the residual voltages are almost completely off the structure eliminated. Because of a clamp bracket a falling of the fracture segments and thereby Consequential damage such as a shutdown, repairs or the like avoided.
Ein weiterer Vorteil besteht darin, daß wesentlich härtere und verschleißfestere Gußwerkstoffe verwendet werden können und daß die Gefahr, daß durch einen unkontrollierten Bruch eines einteiligen Walzenmantels ein Totalschaden am Walzenmantel selbst und Folgeschäden an weiteren Mahlwalzen durch abgefallende Bruchstücke entstehen, weitgehend ausgeschlossen ist.Another advantage is that it is much harder and more wear-resistant cast materials can be used and that there is a risk of an uncontrolled break of a one-piece roller jacket a total damage to the roller jacket itself and consequential damage to other grinding rollers falling fragments arise, largely excluded is.
Weiterhin vorteilhaft ist die kostengünstige Herstellung der erfindungsgemäßen Mahlwalze bzw. des Walzenmantels, welcher zunächst als einteiliger Hartgußring gegossen wird und eine innere, bevorzugt kreiszylindrische Mantelfläche sowie eine äußere Mantelfläche mit Abroll- bzw. Mahlfläche aufweist. Der einteilige Hartgußring kann ohne Unterbrechung der Fügefläche gedreht werden. Da die Schnittfläche durchgehend gestaltet ist, können Hartmetall- oder Keramikschneidplatten eingesetzt werden, so daß eine für segmentierte Walzenmäntel notwendige Einzelsegmentbearbeitung entfallen kann. Dadurch wird eine äußerst einfache und kostengünstige Herstellung des Walzenmantels und der Mahlwalze möglich.The cost-effective production is also advantageous the grinding roller according to the invention or the roller shell, which is first cast as a one-piece chilled iron ring and an inner, preferably circular cylindrical outer surface and an outer surface with rolling or grinding surface having. The one-piece chilled cast iron ring can be used without interruption the joining surface can be rotated. Because the cut surface Tungsten carbide or ceramic inserts can be used throughout be used so that one for segmented Single-segment machining necessary for roller shells can be omitted. This makes it extremely simple and inexpensive manufacture of the roll shell and the grinding roller possible.
Als Sollbruchstellen werden bevorzugt Innenkerben an der inneren Mantelfläche eingeschliffen, die bei entsprechender Beanspruchung nach radial außen bis zur Mahl- bzw. Abrollfläche brechen und Walzenmantel-Bruchsegmente mit komplementären Bruchflächen bilden. Da die Walzenmantel-Bruchsegmente durch eine Halteeinrichtung, insbesondere durch eine Klemm- und Halteeinrichtung, betriebssicher gehalten sind, kann nach einer mit besonders einfachen Mitteln erreichbaren Bruchsegmentierung der Mahlprozeß ohne nachteilige Stillstandszeiten und Instandhaltungsarbeiten fortgesetzt werden.Inner notches on the are preferred as predetermined breaking points ground inside surface, which with appropriate Radial outward stress up to the grinding or rolling surface break and roll shell fracture segments with complementary Form fracture surfaces. Because the roll shell break segments by a holding device, in particular by a Clamping and holding device, are held in a reliable manner, can be achieved with a particularly simple means Fractional segmentation of the milling process without adverse effects Downtimes and maintenance work continued will.
Eine Halteeinrichtung umfaßt in einer zweckmäßigen Ausbildung einen lösbar an einer Stirnseite der Mahlwalze angeordneten Klemmring, der mit Hilfe einer Schraubverbindung mit einem Klauenring, welcher an der gegenüberliegenden Stirnseite an dem radial innenliegenden Grundkörper angeformt ist, eine Klemmhalterung sowohl des einteiligen Walzenmantels als auch der gebildeten Walzenmantel-Bruchsegmente gewährleistet.A holding device comprises in an appropriate training a detachably arranged on an end face of the grinding roller Clamping ring made with a screw connection with a claw ring, which on the opposite Shaped on the radially inner base body is a clamp bracket of both the one-piece roll shell as well as the roll shell break segments formed guaranteed.
Zweckmäßigerweise ist der Klemmring bei einer Mahlwalze für Wälzmühlen an der zur Mühlenachse gerichteten, inneren Stirnseite angeordnet und mehrteilig ausgebildet, um eine einfache und leicht zugängliche Befestigung des Walzenmantels an einem beispielsweise aus dem Mühlengehäuse geschwenkten Walzen-Grundkörper zu ermöglichen.The clamping ring is expedient in the case of a grinding roller for roller mills on the inner facing the mill axis Arranged end face and formed in several parts to a simple and easily accessible fastening of the roller shell on one swung out of the mill housing, for example To enable roller base body.
Der Klemmring besteht aus einzelnen Klemmstücken, die jeweils einem möglichen Walzenmantel-Bruchsegment zugeordnet sind, wodurch ein Lösen und Herunterfallen eines Segmentes verhindert wird. Alle Klemmstücke weisen Ausformungen auf, die in komplementär ausgebildete Ausnehmungen des segmentierbaren Walzenmantels eingreifen.The clamping ring consists of individual clamping pieces, each assigned to a possible roll shell break segment are causing a segment to loosen and fall off is prevented. All clamping pieces have shapes on that in complementary recesses of the intervene in segmentable roller jacket.
Der angeformte, einstückige Klauenring ist mit einer Drehsicherung versehen, durch die eine Fixierung in Umfangsrichtung erfolgt und ein Mitdrehen der Walzenmantel-Bruchsegmente unabhängig vom radial innenliegenden Grundkörper verhindert werden kann.The molded, one-piece claw ring is with a rotation lock provided by a fixation in the circumferential direction takes place and a turning of the roll shell break segments regardless of the radially inner body can be prevented.
Eine besonders einfache und wirkungsvolle Drehsicherung wird mit Nocken erreicht, die radial und axial vom Klauenring abstehen und in Nockenaufnahmen des segmentierbaren Walzenmantels eingreifen.A particularly simple and effective anti-rotation device is achieved with cams that are radial and axial from the claw ring stand out and in cam recordings of the segmentable Intervene in the roller jacket.
Eine vorteilhafte elastische Klemmhalterung, welche die Spannungen des Walzenprozesses kompensiert, kann mit einer federnd gelagerten Hammerschraube erreicht werden, die jeweils im Bereich eines möglichen Walzenmantel-Bruchsegmentes ein Klemmstück des Klemmringes mit dem Klauenring verbindet und dabei durch den radial innenliegenden Grundkörper geführt ist. An advantageous elastic clamp that the Tensions in the rolling process can be compensated with a spring-loaded hammer screw can be reached, each in the area of a possible roll shell break segment connects a clamping piece of the clamping ring with the claw ring and through the radially inner body is led.
Es ist sinnvoll, die Hammerschraube im Bereich des Klemmringes mit einer Mutter und einer untergelegten Tellerfeder zu sichern.It makes sense to use the hammer screw in the area of the clamping ring with a nut and an underlying disc spring to secure.
Die Sollbruchstellen, die an der inneren Mantelfläche als Innenkerben und gegebenenfalls auch an der äußeren Mantelfläche als Außenkerben ausgebildet sind, reichen zweckmäßigerweise über die gesamte axiale Breite der jeweiligen Mantelfläche und bis zu den angrenzenden Stirnseiten des Walzenmantels. Im Abstand von den bevorzugt 10 - 20 mm tiefen und 5 mm breiten Innenkerben sind die Ausnehmungen der Befestigungsbereiche des Walzenmantels angeordnet, um eine sichere Befestigung und Halterung der Walzenmantel-Bruchsegmente zu gewährleisten.The predetermined breaking points, which on the inner lateral surface as Internal notches and possibly also on the outer surface are formed as outer notches, expediently suffice over the entire axial width of the respective Lateral surface and up to the adjacent end faces of the Roll shell. At a distance from the preferred 10 - 20 mm deep and 5 mm wide inner notches are the recesses of the Fastening areas of the roller shell arranged to a secure fastening and holding of the roll shell break segments to ensure.
Wenn die äußere Mantelfläche eines Walzenmantels mit Sollbruchstellen versehen ist, führen Spannungen und eine entsprechende Beanspruchung zu radial nach innen gerichteten Bruchflächen und zur Bildung von Walzenmantel-Bruchsegmenten.If the outer surface of a roll shell with predetermined breaking points is provided, lead tensions and a corresponding Strain too radially inward Fracture surfaces and to form roller jacket fracture segments.
Die Erfindung wird nachstehend anhand einer Zeichnung weiter beschrieben; in dieser zeigen
- Fig. 1
- einen Ausschnitt eines Axialschnittes einer erfindungsgemäßen Mahlwalze im Bereich des segmentierbaren Walzenmantels und
- Fig. 2
- eine Ansicht gemäß Pfeil A in Figur 1.
- Fig. 1
- a section of an axial section of a grinding roller according to the invention in the region of the segmentable roller shell and
- Fig. 2
- a view according to arrow A in Figure 1.
In Figur 1 ist eine Mahlwalze für eine Wälzmühle im Bereich
eines radial außenliegenden Walzenkörpers 5 dargestellt,
der an einem radial innenliegenden Grundkörper 3 der Mahlwalze
befestigt ist. In Figure 1 is a grinding roller for a roller mill in the area
a radially
Als radial außenliegender Walzenkörper 5 ist ein einteilig
hergestellter, unter bestimmten Betriebsbedingungen in
Bruchsegmente brechender Walzenmantel 7 vorgesehen, der
über eine kreiszylindrisch ausgebildete, innere Mantelfläche
15 an dem Grundkörper 3 anliegt und betriebssicher
fixiert ist. Bei einer derartigen Fügung über einen
zylindrischen Sitz ist ein Montagespiel notwendig. Der
segmentierbare Walzenmantel 7, der als Hartgußring gegossen
und danach in einem besonders einfachen und kostengünstigen
Verfahren drehbearbeitet wurde, weist eine äußere, oberflächenebene
Mantelfläche 11 mit einer Abroll- bzw. Mahlfläche
9 auf, die im eingebauten Zustand nahezu parallel zu
einem Mahlteller (nicht dargestellt) angeordnet ist.As a radially
In dem Ausführungsbeispiel gemäß Figur 1 sind Sollbruchstellen
10 an der inneren Mantelfläche 15 als Innenkerben
12 und an der äußeren Mantelfläche 11 als Außenkerben 19
nahezu quer zur Abrollrichtung gemäß Pfeil I ausgebildet.
Bevorzugt wird ein Walzenmantel mit Innenkerben 12, welche
mit vorbestimmten, radial bis zu der Mahlfläche 9 verlaufenden
Bruchkanten zu Walzenmantel-Bruchsegmenten führen
können, so daß die den Bruch verursachenden Spannungen
nicht mehr vorhanden sind.In the exemplary embodiment according to FIG. 1 there are predetermined
Eine Halteeinrichtung 20, welche einen Klemmring 22 mit einer
Hammerschraube 27 umfaßt, hält sowohl den einteilig
hergestellten Walzenmantel 7 als auch die gegebenenfalls
entstehenden Walzenmantel-Bruchsegmente und klemmt sie elastisch
gegen einen Klauenring 24, der radial an der gegenüberliegenden
Stirnseite des radial innenliegenden
Grundkörpers 3 ausgebildet ist. Der aus einzelnen Klemmstücken
bestehende Klemmring 22 weist etwa V-förmige positive
Ausformungen 23 auf, die in komplementäre negative
Ausnehmungen 13 eines Befestigungsbereiches 16 des Walzenmantels
7 eingreifen. Entgegengesetzt ausgebildete
Ausnehmungen 17 in einem stirnseitigen Befestigungsbereich
14 des segmentierbaren Walzenmantels 7 dienen zur
Aufnahme des Klauenrings 24. Die Ausnehmungen 13, 17 in
Stirnseiten 6, 4 des Walzenmantels 7 sind jeweils in einem
definierten radialen Abstand von den als Innenkerben
12 eingeschliffenen Sollbruchstellen 10 ausgebildet.A
Eine Nocke 31 dient zusammen mit einer Nockenaufnahme 18
als Drehsicherung bzw. zur Fixierung der Walzenmantel-Bruchsegmente
in Umfangsrichtung, wie insbesondere aus der
Draufsicht gemäß Pfeil A in Figur 2 hervorgeht.A
Vorteilhaft ist eine federnde bzw. elastische Klemmhalterung
des segmentierbaren Walzenmantels 7 bzw. der Walzenmantel-Bruchsegmente,
die durch eine Tellerfeder 26 und eine
Mutter 28 im Klemmring 22 erreichbar ist.A resilient or elastic clamping bracket is advantageous
the segmentable roll shell 7 or the roll shell break segments,
by a
Claims (14)
- Grinding roller for roller mills, rolling mills or planishing mills having a radially inner basic body (3) and a radially outer roller body (5), which is formed as one-piece roller jacket (7) with a rolling surface or grinding surface (9) and which is made from a much harder and more wear-resistant material than the radially inner basic body (3), and a holding device (20) for fixing the one-piece roller jacket (7) to the radially inner basic body (3),
characterized inthat the roller jacket (7) manufactured in one piece is provided with rated breaking points (10) for a possible breaking segmentation,that in the case of a breaking segmentation of the roller jacket (7) manufactured in one piece breaking segments predetermined by the rated breaking points (10) are formed, and which have radially running complementary breaking surfaces,that the breaking segments predetermined by the rated breaking points (10) form the roller jacket (7) and are held in operationally safe manner by the holding device (20). - Grinding roller according to claim 1,
characterized inthat the rated breaking points (10) are formed transvers to the rolling direction of the grinding roller and run between the end faces (4, 6) of the segmentable roller jacket (7), andthat for holding the segmentable roller jacket (7) or roller jacket breaking segments fixing areas (14, 16) are provided on the end faces (4, 6) and which are positively and/or non-positively connected to the holding device (20). - Grinding roller according to claim 1 or 2,
characterized inthat the segmentable roller jacket (7) manufactured in one piece is constructed as a circular cylinder, as a frustum or with a rounded circumferential surface, which engages with a circular cylindrical face as the inner circumferential surface (15) on the radially inner basic body (3), andthat the rated breaking points (10) are formed in the area of the inner circumferential surface (15) and/or in the area of the outer circumferential surface (11) having the grinding surface (9). - Grinding roller accroding to one of the claims 1 to 3,
characterized inthat a chilled cast metal ring is provided as the roller jacket (7),that as rated breaking points (20) inner notches (12) are ground on the inner circumferential surface (15) and which in the case of stresses break accompanied by formation of roller jacket breaking segments with radial and complementary breaking faces, andthat the roller jacket breaking segments are held in operationally safe manner on their fixing areas (14, 16) by a clamping ring (22) as the holding device (20) cooperating with a guide ring (24) of the radially inner basic body (3). - Grinding roller according to claim 4,
characterized inthat the clamping ring (22) is constructed in multi-parts and has shapes (23), which engage in complementary recesses (13) of the segementable roller jacket (7), andthat a holding and clamping of the resulting roller jacket breaking segments are brought about by the clamping ring (22) connected to the facing guide ring (24). - Grinding roller according to claim 5,
characterized inthat the clamping ring (22) comprises individual clamping portions andthat with each clamping portion is associated a grinding roller breaking segment predetermined by the rated breaking points (10). - Grinding roller according to claim 5,
characterized inthat each clamping portion of the clamping ring (22) is connected with the aid of a T-head bolt (27) to the guide ring (24), the T-head bolt (27) being guided parallel to the grinding roller axis through the radially inner basic body (3) and being elastically mounted on at least one side. - Grinding roller according to one of the preceding claims,
characterized inthat the holding device (20) has a rotation prevention means (29) so as to prevent a concomitant rotation of the segmentable roller jacket (7) or roller jacket breaking segments. - Grinding roller according to claim 8,
characterized inthat as rotation prevention means are provided cams (31), which project axially and/or radially from the guide ring (24) and engage in cam receptacles (18), which are formed in the fixing area (14) of the segmentable roller jacket (7). - Grinding roller according to one of the preceding claims 5 to 9,
characterized inthat the shapes (23) of the multipart clamping ring (22) and of the guide ring (24) have an approximately V-shaped cross-section, andthat the complementary constructed recesses (13, 17) of the fixing areas (14, 16) of the segmentable roller jacket (7) are at a clearly defined spacing from the inner circumferential surface (15) and from the inner notches (12) worked as rated breaking points (10). - Grinding roller according to one of the preceding claims,
characterized inthat the inner notches (15) in the form of rated breaking points (10) and/or the outer notches (19) formed on the grinding surface (9) have a width of approximately 5 mm and a depth of 10 to 20 mm. - Grinding roller according to one of the preceding claims,
characterized inthat the rated breaking points (10) have a constant depth and/or width over their entire axial length. - Grinding roller according to one of the preceding claims,
characterized inthat the segmentable roller jacket (7) manufactured in one piece is made from a brittle material, particularly a ceramic material, chromium chilled cast metal, Ni-hard material or a similar hard material without a measurable elongation at break. - Method for the manufacture of a grinding roller according to claim 1,
characterized inthat a one-piece chilled cast metal ring is cast with an inner and an outer circumferential surface, that the outer circumferential surface is turned as a single, surface-plane face,that at least on the inner circumferential surface are formed roughly axially parallel rated breaking points, through which complementary breaking faces are formed on roller jacket breaking segments, after fixing the one-piece roller jacket to a radially inner basic body and in the case of a corresponding stressing radially directed, andthat the segmentable roller jacket manufactured in one piece as well as the roller jacket breaking segments predetermined by the rated breaking points are held in operationally safe manner by a clamping and holding device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4400090 | 1994-01-04 | ||
| DE4400090A DE4400090C1 (en) | 1994-01-04 | 1994-01-04 | Grinding roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0661099A1 EP0661099A1 (en) | 1995-07-05 |
| EP0661099B1 true EP0661099B1 (en) | 1998-08-05 |
Family
ID=6507443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94118707A Expired - Lifetime EP0661099B1 (en) | 1994-01-04 | 1994-11-28 | Milling roller |
Country Status (17)
| Country | Link |
|---|---|
| US (1) | US5513812A (en) |
| EP (1) | EP0661099B1 (en) |
| JP (1) | JPH07214475A (en) |
| KR (1) | KR950023445A (en) |
| CN (1) | CN1044869C (en) |
| AT (1) | ATE169241T1 (en) |
| AU (1) | AU678646B2 (en) |
| BR (1) | BR9500015A (en) |
| CA (1) | CA2138217A1 (en) |
| DE (2) | DE4400090C1 (en) |
| DK (1) | DK0661099T3 (en) |
| ES (1) | ES2121134T3 (en) |
| MY (1) | MY131723A (en) |
| PH (1) | PH30719A (en) |
| TR (1) | TR28452A (en) |
| TW (1) | TW312632B (en) |
| ZA (1) | ZA949680B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102228849A (en) * | 2011-07-22 | 2011-11-02 | 成都利君实业股份有限公司 | Roller of cement finish grinding roller press |
| JP6578110B2 (en) * | 2015-03-05 | 2019-09-18 | 三菱日立パワーシステムズ株式会社 | Crushing roller and crusher |
| CN118320936B (en) * | 2024-06-17 | 2024-08-30 | 山东硕源工业装备集团有限公司 | Medium-speed pulverizer grinding roller with compound roller shell |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE240338C (en) * | ||||
| US2294098A (en) * | 1941-05-10 | 1942-08-25 | Elmer C Stromer | Renewable shell for crusher rolls |
| FI45876C (en) * | 1970-08-12 | 1972-10-10 | Yhtyneet Paperitehtaat Oy | Device for attaching wood grinding stone |
| US3969062A (en) * | 1975-07-22 | 1976-07-13 | K. R. Komarek, Inc. | Briquetting roll having removable mold segments |
| DE2742678C2 (en) * | 1977-09-22 | 1987-02-19 | Deutsche Babcock Ag, 4200 Oberhausen | Grinding roller |
| US4232834A (en) * | 1979-08-13 | 1980-11-11 | Minneapolis Electric Steel Castings Company | Roll crusher |
| SU1666178A1 (en) * | 1986-03-03 | 1991-07-30 | Научно-Производственное Объединение По Технологии Машиностроения "Цниитмаш" | Medium-speed roller mill |
| DE3833614A1 (en) * | 1988-10-03 | 1990-04-05 | Krupp Polysius Ag | Roller mill |
| DE3836322A1 (en) * | 1988-10-25 | 1990-04-26 | Kloeckner Humboldt Deutz Ag | Crushing rolls |
| DE3915320A1 (en) * | 1989-05-10 | 1990-11-15 | Krupp Polysius Ag | GRINDING ROLLER |
-
1994
- 1994-01-04 DE DE4400090A patent/DE4400090C1/en not_active Expired - Fee Related
- 1994-05-13 US US08/242,392 patent/US5513812A/en not_active Expired - Fee Related
- 1994-11-28 DE DE59406611T patent/DE59406611D1/en not_active Expired - Fee Related
- 1994-11-28 EP EP94118707A patent/EP0661099B1/en not_active Expired - Lifetime
- 1994-11-28 DK DK94118707T patent/DK0661099T3/en active
- 1994-11-28 ES ES94118707T patent/ES2121134T3/en not_active Expired - Lifetime
- 1994-11-28 AT AT94118707T patent/ATE169241T1/en not_active IP Right Cessation
- 1994-11-30 TW TW083111132A patent/TW312632B/zh active
- 1994-12-02 PH PH49491A patent/PH30719A/en unknown
- 1994-12-06 ZA ZA949680A patent/ZA949680B/en unknown
- 1994-12-09 MY MYPI94003298A patent/MY131723A/en unknown
- 1994-12-15 CA CA002138217A patent/CA2138217A1/en not_active Abandoned
- 1994-12-19 TR TR01324/94A patent/TR28452A/en unknown
- 1994-12-28 KR KR1019940037833A patent/KR950023445A/en not_active Application Discontinuation
- 1994-12-29 JP JP6338572A patent/JPH07214475A/en active Pending
-
1995
- 1995-01-03 BR BR9500015A patent/BR9500015A/en not_active IP Right Cessation
- 1995-01-03 AU AU10016/95A patent/AU678646B2/en not_active Ceased
- 1995-01-04 CN CN95100524A patent/CN1044869C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| TR28452A (en) | 1996-07-01 |
| MY131723A (en) | 2007-08-30 |
| BR9500015A (en) | 1995-10-03 |
| DE59406611D1 (en) | 1998-09-10 |
| US5513812A (en) | 1996-05-07 |
| ZA949680B (en) | 1995-08-15 |
| CN1044869C (en) | 1999-09-01 |
| TW312632B (en) | 1997-08-11 |
| AU1001695A (en) | 1995-07-13 |
| CN1118281A (en) | 1996-03-13 |
| AU678646B2 (en) | 1997-06-05 |
| KR950023445A (en) | 1995-08-18 |
| CA2138217A1 (en) | 1995-07-05 |
| ES2121134T3 (en) | 1998-11-16 |
| DE4400090C1 (en) | 1995-04-20 |
| DK0661099T3 (en) | 1999-05-03 |
| EP0661099A1 (en) | 1995-07-05 |
| PH30719A (en) | 1997-10-02 |
| ATE169241T1 (en) | 1998-08-15 |
| JPH07214475A (en) | 1995-08-15 |
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