EP0607853A2 - Broyeur à cylindres avec un guide du produit à chaque fin des cylindres - Google Patents

Broyeur à cylindres avec un guide du produit à chaque fin des cylindres Download PDF

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Publication number
EP0607853A2
EP0607853A2 EP94100344A EP94100344A EP0607853A2 EP 0607853 A2 EP0607853 A2 EP 0607853A2 EP 94100344 A EP94100344 A EP 94100344A EP 94100344 A EP94100344 A EP 94100344A EP 0607853 A2 EP0607853 A2 EP 0607853A2
Authority
EP
European Patent Office
Prior art keywords
guide surface
guide
product
rolling mill
operating position
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.)
Granted
Application number
EP94100344A
Other languages
German (de)
English (en)
Other versions
EP0607853B1 (fr
EP0607853A3 (fr
Inventor
Wilhelm Fetzer
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.)
Buehler AG
Original Assignee
Buehler 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 Buehler AG filed Critical Buehler AG
Publication of EP0607853A2 publication Critical patent/EP0607853A2/fr
Publication of EP0607853A3 publication Critical patent/EP0607853A3/fr
Application granted granted Critical
Publication of EP0607853B1 publication Critical patent/EP0607853B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B02C4/286—Feeding devices

Definitions

  • the invention relates to a rolling mill, in particular a flaking mill according to the preamble of the first claim.
  • Rolling mills of the prior art which were already state of the art for EP 271 828, were built in such a way that the rolls had no bevels at their ends and were adjacent with the end faces of the rolls tightly against the end walls of the rolling mill, so that the product up to could flow to the end walls of the rolling mill, with the result that the aforementioned tubers or other coarse parts at the ends of the rolls were kept in motion until they had reached a size due to wear, which allowed them to be drawn into the grinding gap.
  • these parts are even larger than the granulation of the product, ie the deformation forces are higher and thus the surface load on the rollers. Such loads can damage the rollers, especially if this occurs at the end of the roller. The consequences are broken roller ends.
  • EP 271 828 already proposed to provide a chamfer on the roller ends, which is adjoined by a guide surface and prevents the above-mentioned coarse parts in the channel formed by the chamfer at the ends of the Unprocessed rollers can get past the rollers.
  • FIG. 1 shows a rolling mill 1 with a pair of rollers consisting of rollers 2 and 3 (see FIGS. 3 and 4), of which only roller 2 can be seen in FIG. 1.
  • These rollers rotate about an axis of rotation 5 and are rotatably mounted in bearing supports 6, and are driven by means of a drive disk 7 (only one shown) or a drive disk and an overdrive (not shown).
  • the product to be processed by the rollers e.g. Grains or granules, e.g. must be flaked, are fed by a feed roller 8, which in turn receives the product from the product distributor 9.
  • the product is fed into the rolling mill and thus into the product distributor 9 by a product feed 10, e.g. a mechanical feed.
  • a product feed 10 e.g. a mechanical feed.
  • rollers 2 and 3 have bevels 43 on the end faces which, as shown in FIGS. 3 and 4, result in a channel with an opening angle ⁇ of 60 ° -100 °, preferably 90 °, through which product unprocessed on the end sides could, if not an inventive Rocker arm 11 would close the aforementioned passage with a guide surface 12.
  • the rocker arm 11 is pivotably mounted in a pivot bearing 13.
  • a cylinder-piston unit 16 which is connected on the piston side by means of a pivot axis 15 to the rocker arm 11 and on the cylinder side by means of a pivot bearing 17 to a stationary housing part 18, develops the force to press the rocker arm 11 against a stop 20, which is part of a stationary product guide 19 .
  • the guide surface 12 lies exactly such that the aforementioned channel forming the angle ⁇ is closed up to the aforementioned desired passage, but without directly touching the roller ends.
  • the cylinder-piston unit 16 is a single-acting cylinder with a compression spring 21, which generates the force by means of which the rocker arm 11 is pressed against the stop 20.
  • the product guide 19 is channel-shaped and ensures that product which reaches the end face of the rollers 2 and 3 is guided back into the grinding gap by means of the guide surface 12.
  • a stationary end wall 22 is provided, which is part of a housing which surrounds the rollers.
  • an inclined guide 23 is provided, to which a rotary valve 24, the function of which will be described later, is connected.
  • the rotary flap 24 is rotatably mounted in the bearing body 45 by means of a pivot shaft 25 (FIGS. 1a, b), which in turn are embedded in the inclined guide 23.
  • the pivoting of the flap 24 takes place, as shown in FIG. 5, by means of a pivot lever 26 connected to the shaft 25, which pivotally connected to a cylinder-piston unit 27, which in turn is pivotably mounted in a stationary housing part 28.
  • product guides 19 and rocker arms 11 are arranged on both sides of the end faces of the rollers 2 and 3 with everything that belongs to them as described above. The same applies to the rotary flap 24.
  • rotary flap 24 is closed with solid lines and shown open with dashed lines. Product which flows through the opened rotary flap 24 when the rocker arm 11 is pivoted downward is collected in a collecting element 46 which is located below the rotary flap 24.
  • Figure 2 shows on the left hand side, looking at Figure 2, i.e. 1, insofar as a variant of the rocker arm 11 of FIG. 1, as here a rocker arm 11.1 with a guide surface 12.1 and a product guide 19.1 form a fixed part, which cannot be pivoted in a stationary manner but as a whole by means of a pivot bearing 37 is arranged on a stationary housing part 38.
  • the drive means of the rocker arm 11.1 and the product guide 19.1 is a cylinder-piston unit 16.1, which is arranged on the product guide 19.1 by means of a pivot axis 15.1, and on a stationary housing part 39 by means of a pivot bearing 17.1, which is why the same characteristics from FIG. 1 only have been given an index 1.
  • the guide surface 41 is part of a guide roller 40 which is rotatably arranged on the rocker arm 11.2 and has the same function as the guide surfaces 12 and. 12.1.
  • the rocker arm 11.2 has a product guide 19.2, which has the same function as the product guide 19.1 on the left-hand side of FIG. 2.
  • the rocker arm 11.2, including the product guide 19.2, is pivotably mounted in the stationary housing part 38 by means of a pivot bearing 37.1.
  • the rocker arm 11.2 including the guide roller 40 is surrounded by a cover part 44, which has the function of preventing product behind the rocker arm and thus past the grinding gap 4 past the end face of the rollers 2 and 3 in the collecting funnel 29 can reach unprocessed.
  • FIG. 5 shows an enlarged view of the right half of the rolling mill shown in FIG. 1, in which here a control 33 is shown schematically, which controls the cylinders via a valve 34 and a pressure line 47 connecting the valve 34 to the cylinder-piston unit 16
  • Piston unit 16 controls that the compression spring 21 is compressed and the rocker arm 11 is pivoted in the counterclockwise direction, so that the channel formed with the angle ⁇ is opened for a predetermined short time until the material accumulated on the guide surface 12 after can reach down towards the rotary flap 24.
  • the rotary flap 24 is opened, so that the aforementioned material released by the guide surface 12 can reach the collecting element 46.
  • a cylinder-piston unit 27 is pressurized via a valve 35 connected to the control 33 by means of a pressure line 48 in such a way that a spring 30 located in the cylinder-piston unit 27 is compressed, as a result of which the rotary flap 24 moves counterclockwise pivoted, ie is opened.
  • the cylinder-piston unit 27 is pivotably arranged on a stationary housing part 28.
  • the guide surface 12 or 12.1 can be provided either as with full lines or as drawn with dash-dotted lines, which means that the end of the guide surface 12 or 12.1 directed towards the rollers 2, 3 is at a distance h from that in one of the axes 5 containing the imaginary plane has the narrowest gap between the rollers 2 and 3.
  • the different effects of the two positions of the guide surface 12 and 12.1 will be explained later in connection with the explanations of FIGS. 7 and 7a.
  • the controller 33 can be provided so that the rocker arm 11 together with the rotary flap 24 with a predetermined cycle, i.e. predetermined time interval is opened, or a clock 36 can be provided, by means of which the clock is variably set.
  • Another embodiment consists in equipping the cylinder-piston unit in such a way that the movement of the piston is measured, for example according to a system from a Sacol company with a hundred micron displacement transducer, so that there is one on the guide surface 12 Part that is much heavier than the product and is also located on the guide surface 12, causes an albeit minimal displacement of the piston of the cylinder-piston unit 16 and realizes this movement by the measuring system and feeds it as a signal to the controller 33, which thereby causes the rocker arm 11 to open.
  • a further embodiment consists in that the guide surface 12 or 12.1 is to be provided with a strain gauge (not shown) which detects any, albeit minimal, deflection of the guide surface, which, however, is outside a predetermined tolerance range, and thereby also a signal to the controller 33 in order to cause the aforementioned opening of the toggle lifter 11 or 11.1.
  • a strain gauge not shown
  • Fig. 6 shows a variant of the arrangement of Fig. 5, in that the pivot lever 26 is pivoted by means of a knee joint 49, wherein a pivot lever 51 of the knee joint 49 is pivotally connected to the pivot lever 26 and on the other hand a pivot lever 50 of the knee joint 49 is fixed the pivot axis 15 is connected.
  • FIGS. 7 and 7a are intended to show how coarse contaminants which do not fit into the narrowest gap the rollers are retracted.
  • a coarse impurity is identified by 53, and from FIG. 7 it can be seen that due to the position of the coarse impurity 53 in the nip, a pull-in angle ⁇ arises which is due to the tangents at the contact lines or contact points of the coarse impurities the rollers is formed.
  • the coarse impurity 53 is in a lower position, with a view of FIG. 7, in which a draft angle is established which, as from FIG. 7 can be seen, is smaller than the feed angle ⁇ .
  • the distance h shown in FIGS. 5 and 6 is selected empirically so that a coarse impurity which rests on the guide surface 12.1 has an indentation angle which is small enough to prevent friction between the coarse impurity 53 and the surfaces 43 to generate which is large enough to use this force to bend a resilient rocker arm 11.3 shown in FIGS. 8 and 8a downwards, so that the coarse contamination can fall into the area below the rollers 2 and 3.
  • the rocker arm is moved by force means as shown in FIGS. 1 to 6, the coarse impurity 53 only reaches the aforementioned area below the rollers 2 and 3 when the rocker arm 11 or 11.1 or 11.2 is folded down.
  • the resilient rocker arm 11.3 is provided with a plate part 52 which is fixedly connected to a product guide 19.3, which in turn is arranged stationary.
  • the Rocker arm 11.3 lies on the side walls of the product guide 19.3 with an empirically defined, predetermined pretension and closes the product guide in the lower part until - as mentioned above - a rough contamination 53 overcomes the spring force of the rocker arm 11.3.
  • the angle ⁇ entered in FIG. 8a represents the guide angle of all rocker arms 11 to 11.3, and can be selected empirically, for example between 30 and 80 °, preferably between 45 and 60 °.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Metal Rolling (AREA)
EP94100344A 1993-01-20 1994-01-12 Broyeur à cylindres avec un guide du produit à chaque fin des cylindres Expired - Lifetime EP0607853B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH15993 1993-01-20
CH159/93 1993-01-20

Publications (3)

Publication Number Publication Date
EP0607853A2 true EP0607853A2 (fr) 1994-07-27
EP0607853A3 EP0607853A3 (fr) 1995-01-11
EP0607853B1 EP0607853B1 (fr) 1999-04-28

Family

ID=4180604

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94100344A Expired - Lifetime EP0607853B1 (fr) 1993-01-20 1994-01-12 Broyeur à cylindres avec un guide du produit à chaque fin des cylindres

Country Status (3)

Country Link
US (1) US5386946A (fr)
EP (1) EP0607853B1 (fr)
DE (1) DE59408152D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022174957A1 (fr) * 2021-02-16 2022-08-25 Maschinenfabrik Köppern Gmbh & Co. Kg Presse à rouleaux haute pression

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5823452A (en) * 1997-05-05 1998-10-20 Ballew; Russell Flaker mill
US7473169B2 (en) * 2007-02-28 2009-01-06 Cnh America Llc Adjustable axial rotor discharge deflector
US20100243963A1 (en) * 2009-03-31 2010-09-30 Integrated Photovoltaics, Incorporated Doping and milling of granular silicon

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE25350C (de) * C. SCHLICKEYSEN in Berlin SO., Wassergasse 17 u. 18 Verschlufsklappe an konischen oder cylindrischen Thon- und Feinwalzwerken zur Entfernung von Steinen
DE2900922A1 (de) * 1979-01-11 1980-07-17 Bauermeister Hermann Maschf Quetschwalzwerk, insbesondere zum flockieren von oelsaatbruch
EP0271828A2 (fr) * 1986-12-17 1988-06-22 Gebrueder Buehler Ag Maschinenfabrik Broyeur à cylindres et procédé pour l'alimentation de matières granuleuses

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US315897A (en) * 1885-04-14 brewer
US1961291A (en) * 1933-01-20 1934-06-05 Gen Printing Ink Corp Grinding mill
US2063363A (en) * 1933-02-04 1936-12-08 Charles P Brasington Grinding mill
US2060868A (en) * 1935-02-19 1936-11-17 J M Lehmann Company Inc Side shield raising device for roller mill hoppers
US2808215A (en) * 1955-03-03 1957-10-01 Buehler Ag Geb Sealing shields for roller mills
US4839494A (en) * 1988-06-03 1989-06-13 Ntronix, Inc. Electromagnetic container sealing apparatus
US5054701A (en) * 1989-06-20 1991-10-08 Fives-Cail Babcock Milling process and apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE25350C (de) * C. SCHLICKEYSEN in Berlin SO., Wassergasse 17 u. 18 Verschlufsklappe an konischen oder cylindrischen Thon- und Feinwalzwerken zur Entfernung von Steinen
DE2900922A1 (de) * 1979-01-11 1980-07-17 Bauermeister Hermann Maschf Quetschwalzwerk, insbesondere zum flockieren von oelsaatbruch
EP0271828A2 (fr) * 1986-12-17 1988-06-22 Gebrueder Buehler Ag Maschinenfabrik Broyeur à cylindres et procédé pour l'alimentation de matières granuleuses

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022174957A1 (fr) * 2021-02-16 2022-08-25 Maschinenfabrik Köppern Gmbh & Co. Kg Presse à rouleaux haute pression

Also Published As

Publication number Publication date
EP0607853B1 (fr) 1999-04-28
EP0607853A3 (fr) 1995-01-11
US5386946A (en) 1995-02-07
DE59408152D1 (de) 1999-06-02

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