EP3127614A2 - Broyeur a cylindres ayant un mode de fonctionnement couper/couper et mode de fonctionnement dos/dos - Google Patents

Broyeur a cylindres ayant un mode de fonctionnement couper/couper et mode de fonctionnement dos/dos Download PDF

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Publication number
EP3127614A2
EP3127614A2 EP16182798.5A EP16182798A EP3127614A2 EP 3127614 A2 EP3127614 A2 EP 3127614A2 EP 16182798 A EP16182798 A EP 16182798A EP 3127614 A2 EP3127614 A2 EP 3127614A2
Authority
EP
European Patent Office
Prior art keywords
roller
electric machine
roller mill
corrugating
speed
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
EP16182798.5A
Other languages
German (de)
English (en)
Other versions
EP3127614B2 (fr
EP3127614B1 (fr
EP3127614A3 (fr
Inventor
Franz Schmid
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.)
Ing Stefan Kastenmueller GmbH
Original Assignee
Ing Stefan Kastenmueller GmbH
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
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Application filed by Ing Stefan Kastenmueller GmbH filed Critical Ing Stefan Kastenmueller GmbH
Priority to PL16182798T priority Critical patent/PL3127614T5/pl
Publication of EP3127614A2 publication Critical patent/EP3127614A2/fr
Publication of EP3127614A3 publication Critical patent/EP3127614A3/fr
Application granted granted Critical
Publication of EP3127614B1 publication Critical patent/EP3127614B1/fr
Publication of EP3127614B2 publication Critical patent/EP3127614B2/fr
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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
    • B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
    • B02C4/08—Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C9/00—Other milling methods or mills specially adapted for grain
    • B02C9/02—Cutting or splitting grain

Definitions

  • the invention relates to a roll mill having a first corrugating roll having a plurality of first corrugated edges and first corrugation ridges, and a second corrugating roll having a plurality of second corrugated edges and second corrugation ridges, the roll mill being configured to be in one or more cutting edges.
  • Cutting mode in which the first cutting edges and the second cutting edges are approached to each other, or in a back-to-back mode in which the first back and the second backs are mutually approximated to be operated.
  • Such roll mills are used in mills for grinding millbase of vegetable origin, for example for milling cereals (for example wheat, barley, rye, oats, spelled) or other products (for example corn, manioc, cocoa beans, coffee beans, nuts).
  • a back-to-back and a cutting-edge operation mode (RR and SS operation modes, respectively) will be described with reference to FIG. 1a and FIG. 1b briefly explained below.
  • a first roller (front roller) 12 and a second roller (rear roller) 14 are each rotatably mounted about its axis of rotation, wherein the two axes of rotation parallel to each other and between the two rollers 12, 14, there is a gap 13 for receiving the ground material.
  • the lateral surface of the front roller 12 is provided with a plurality of ridges, each ridge having a cutting surface 32 and a back surface 34.
  • the Riffelschen are each aligned approximately tangentially to the lateral surface of the front roller 12.
  • the corrugated edges 32 are approximately perpendicular to the mantle surface of the front roller 12. The same applies mutatis mutandis to the corrugated edges 36 and Riffelschreiben 38 of the rear roller 14.
  • the two rollers are driven so that they rotate at opposite rotational speeds. This has the effect that the corrugations of the front roller 12 and the corrugations of the rear roller 14 in the region of the gap 13 in the transport direction of the material to be ground (for example, from top to bottom) move.
  • the roller As a front roller, the roller is referred to, in which the rear surface of each corrugation in the direction of movement of the corrugated considered is upstream of the cutting surface of the corrugated in question. That is, in the front roller always first enters the rear surface and then the cutting surface of the corrugated in the gap 13 a. In other words, in the front roller, the back surface of a corrugation is at the front in the direction of movement and the cutting surface of the corrugation is at the rear. In the case of the rear roller, on the other hand, the cutting surface of a corrugation lies in the direction of movement at the front and the rear surface of the corrugation lies behind. In other words, the serrated blades 32 of the front roller 12 are respectively turned backward, while the serrated blades 36 of the rear roller 14 are respectively turned forward.
  • a change from an RR mode to an SS mode can be achieved in two different ways.
  • One way is to cause the rear roller 14 to rotate faster than the front roller 14 in the SS mode.
  • This is in Figure 1 b illustrates where the rear roller 14 rotates, for example, three times as fast as the front roller 12.
  • Such a change in speeds is usually not easy to do with today conventional roll mills, since the front and the rear roller of a common motor on a common transmission to be driven.
  • the transmission usually has no or only a few adjustment options.
  • the speed ratio between the rear and front rollers is fixed.
  • the switch from RR to SS mode succeeds by taking the two rollers 12, 14 out of their respective bearings with the engine stopped, then turning them 180 ° around their respective suitable transverse axis and returning them to their rotated position each storage used to be stored.
  • the front roller 12 becomes the new rear roller 12
  • the rear roller 14 becomes the new front roller 14.
  • This object is achieved in that the change takes place during operation by a change in the rotational speed of the first corrugating roll and / or a change in the rotational speed of the second corrugating roll.
  • the drive mechanism of the roller mill is designed so that the rotational speed of the first corrugating roll and / or the rotational speed of the second corrugating roll during operation, that is, while both rollers rotate normally, is possible.
  • the roller mill comprises a gear by means of which the rotational speed of the first corrugating roller and / or the rotational speed of the second corrugating roller can be changed.
  • the roller mill comprises a first electric machine for driving the first corrugating roller and a second electric machine for driving the second corrugating roller.
  • a first electric machine for driving the first corrugating roller
  • a second electric machine for driving the second corrugating roller.
  • the first electric machine and the second electric machine have different nominal powers. For example, for many applications (for example, milling grain), it may be sufficient if the electric machine for driving the rear roller has a lower rated power than the electric machine for driving the front roller.
  • the ratio of the rated power of the two electric machines can be, for example, in the range between 1: 1.2 and 1: 5. Preferably, it is in the range of 1: 2 to 1: 4. This achieves a good compromise between manufacturing costs on the one hand and versatility in use on the other hand.
  • the electric machine has the higher rated power that drives the front corrugating roll.
  • the front is Roll the faster of the two corrugating rolls.
  • the rear roller is the faster, but in the SS mode for driving the rear roller is a relatively low performance, since in SS mode typically relatively low speeds are selected.
  • the first electric machine is associated with a first frequency converter and the second electric machine with a second frequency converter.
  • the first electric machine can be connected to an electrical voltage source via the first frequency converter.
  • the second electric machine can be connected to a second voltage source via the second frequency converter.
  • the first and the second electric machine are connected via the respective frequency converter in each case to the same voltage source, for example to a private or public power grid.
  • the voltage source may be an AC voltage source or a DC voltage source.
  • the frequency of the voltage supplied by the AC voltage source may be, for example, between 20 Hz and 100 Hz.
  • Power grids generally supply an AC voltage with an effective voltage of 110 V (for example in the USA) or 220 V (for example in Europe);
  • the first and the second frequency converter are suitable for connection to such an AC voltage network.
  • the output frequency of the respective frequency converter and thus the speed of the first or second electric machine can be controlled by controlling the first or second frequency.
  • the speed of the first or second electric machine is identical to the frequency of the output voltage (output frequency) of the first and second frequency converter.
  • a first or a second control unit may be provided for controlling the first or second frequency converter.
  • the frequency of the output voltage of the first or second frequency converter can be adjusted by means of the first or second control unit.
  • the first and second control units preferably have an operating unit, for example in the form of a rotary knob, for setting the desired output frequency.
  • the first and second control units may have a common housing.
  • one of the two electrical machines can operate as a motor and the other as a generator.
  • This case can occur when the faster of the two rollers slower due to traction and / or frictional engagement drives so strongly over the material to be ground between the two rollers that the slower roller provides a net electrical power, which flows for example in the power grid or directly back into the electric machine of the faster roller.
  • the slower roller is driven in part by its associated electrical machine and the remainder by frictional engagement and / or frictional engagement with the faster roller.
  • the energy generated by the electric machine operated as a generator is at least partially used for driving the electric motor operated as a motor. This can be realized, for example, by coupling the first electric machine and the second electric machine to one another via a power coupler.
  • the first corrugating roll and the second corrugating roll have the same roll diameter.
  • the roller mill is equally suitable for the R-R mode as the S-S mode.
  • the first and the second corrugating roll are identical. This simplifies the manufacture, maintenance and, if necessary, repair of the roller mill.
  • the ratio of the speed of the first roller and the speed of the second roller in the range of 7: 1 and 1: 4.5 is variable. This range is considered to be sufficiently large to meet the common requirements for different millbase and different required properties of the produced meal or flour.
  • the variation of the rotational speed of the first corrugating roll and / or the change of the rotational speed of the second corrugating roll can cause a stepless change of a differential speed and a corrugated action. This is achieved, for example, by providing a continuously variable first or second operating unit for adjusting the rotational speed of the first corrugating roller and / or for adjusting the rotational speed of the second corrugating roller.
  • FIG. 2 12 schematically shows an example of a roller mill 10 having a first corrugating roll (first roll) 12 and a second corrugating roll (second roll) 14.
  • the first roll 12 has a plurality of first corrugated cutting edges 32 and first corrugation ridges 34.
  • the second roller 14 has a plurality of second corrugated edges 36 and second corrugation ridges 38.
  • the roller mill 10 is adapted to be operated either in a cutting-edge mode or in a back-to-back mode. In the SS mode, the first cutting edges 32 and the second cutting edges 36 are approximated to each other. In the RR mode, the first spines 34 and the second spines 38 are approximated to each other.
  • a change between the SS mode and the RR mode can be done during operation by changing the speed of the first roller 12 and / or by changing the speed of the second roller 14.
  • the first roller 12 as a front roller and the second roller 14 operated as a rear roller.
  • the roller mill 10 comprises a first electric machine 16 and a second electric machine 18.
  • the first roller 12 is mechanically and / or electromagnetically coupled or couplable to the first electric machine 16, so that the first electric machine has a torque (in the example parallel to the first electric machine) Y-axis, which is perpendicular to the plane of the drawing) on the first roller 12 can exercise to cause a rotation of the first roller 12 about its axis of rotation (in the example parallel to the Y-axis).
  • the second electric machine 18 is mechanically or electromagnetically coupled or coupleable to the second roller 14 and is capable of exerting a torque (in the example parallel to the Y-axis) on the second roller 14 to cause rotation of the second roller 14 second roller 14 about its axis of rotation (in the example parallel to the Y-axis) to effect.
  • the first roller 12 and the second roller 14 are operated in opposite directions. That is, the rotational speed vector of the second roller 14 is opposite to the rotational speed vector of the first roller 12.
  • the rotational speed vector of the first roller 12 points toward the Y direction (out of the plane of the drawing) while the rotational speed vector of the second roller 14 points in the positive Y direction (into the plane of the drawing).
  • the two electric machines 16, 18 may each be, for example, an AC, a three-phase or a DC motor.
  • the maximum power (or rated power) of the first electric machine 16 is higher than the maximum power or the rated power of the second electric machine 18. Further, the maximum speed or the rated speed of the first electric machine 16 is higher than the maximum speed or the rated speed of the first electric machine second electric machine 18.
  • the maximum power and / or the maximum speed of the first machine 16 is usually required in the RR mode.
  • the maximum power and / or the maximum speed of the second electric machine 18 is usually required in the SS mode and is less than the maximum required by the first machine 16 power or speed.
  • the first electric machine 16 has a rated power of 7.5 kW and a maximum speed of 1000 rpm
  • the second electric machine 18 has a rated power of 2.2 kW and a maximum speed of 200 rpm.
  • the first electric machine 16 is connected or connectable via a first frequency converter 20 to a voltage source 26, for example an AC power source.
  • the second electric machine 18 is connected or connectable to the voltage source 26 via a second frequency converter 22.
  • the voltage source 26 may be, for example, a connection point to an extended power supply network.
  • the voltage source 26 may provide, for example, an AC voltage of 220 V and 50 Hz.
  • Each of the two frequency converters 20, 22 uses the input voltage applied at its voltage input (for example, the supply voltage supplied by the voltage source 26) to provide an output voltage with suitable voltage at its voltage output (which is connected to the first and second electric machines 16, 18, respectively) RMS value and suitable frequency.
  • the first frequency converter 20 thus supplies the first electric machine 16 with an alternating voltage having a first frequency F1.
  • the second frequency converter 22 supplies the second electric machine 18, an AC voltage having a second frequency F2.
  • the roller mill 10 further comprises a first control unit 40 for setting the output frequency F1 generated by the first frequency converter 20 and a second control unit 42 for setting the output frequency F2 generated by the second frequency converter 22.
  • the first control unit 40 and the second control unit 42 may each be mechanically, electrically, electromagnetically or electromechanically coupled to the corresponding first and second frequency converter 20, 22, respectively.
  • the two controllers 40, 42 may each include a user interface and / or a computer interface 44 and 46, respectively, to allow a user or computer to set the output frequencies F1 and F2 of the frequency converters 20, 22.
  • the first frequency converter 20 and the first electric machine 16 connected to it have, in a simplest embodiment, a transmission ratio of 1: 1.
  • the output voltage of the first frequency converter 20 with frequency F1 generates a corresponding rotation of the first roller 12 at the same frequency, that is, rotational speed, F1.
  • the rotational speeds D1 and D2 of the first and second rollers 12, 14 can be adjusted individually, in particular during operation, that is, while the rollers 12, 14 rotate and while they from the frequency converters 20, 22 with Be supplied with energy. In particular, it is possible in this way to change from an S-S mode (in which D2> D1) to an R-R mode (in which D1> D2) and vice versa during operation.
  • the faster rotating roll transfers energy to the mill base (for example, grain) through mechanical contact with the slower rotating roll slower roller and thus drives it partially or even completely.
  • the electric machine of the slower roller behaves as an electric generator.
  • the generator-behaving electric machine either the first electric machine 16 or the second electric machine 18
  • a power coupler 24 is provided, which electrically couples the two frequency converters 20, 22 together and thus returns the generated electrical energy to the frequency converter (20 or 22) of the faster rotating drum (12 or 14).
  • the voltage source 26 is thus relieved.
  • a suitable power coupler is offered for example by the company Eaton (formerly Moeller). When using the power coupler 24, the rotational speeds of the two rollers 12, 14 can be changed almost arbitrarily and independently, without losing energy to a greater extent.
  • the rollers 12, 14 are driven by the respective electric machine 16 or 18 via a first gear 17 and a second gear 19, respectively.
  • the two transmissions 17 and 19 can each be a transmission with a fixed (that is, not adjustable) gear ratio, since the rotational speeds of the first and second electric machines 16, 18 can be varied. On manual transmission can be dispensed without taking any significant disadvantages in purchasing.
  • the flowchart in FIG. 4 illustrates a method 200 for operating a rolling mill, for example, the rolling mill 10 from FIG. 2 .
  • a first phase 202 the rolling mill is operated in an RR mode. That is, the front roller rotates faster than the rear roller (D1 ⁇ D2).
  • the front roller speed D1 is reduced and the rear roller speed D2 is increased. This can be done during operation by reducing the speed of the first electric machine and increasing the speed of the second electric machine.
  • the rear roller rotates faster than the front roller. That is, D1 ⁇ D2.
  • the rolling mill is now operated in an SS mode.
  • a subsequent phase 208 the speed D1 of the first roller is increased again and the speed D2 of the second roller is reduced again.
  • this succeeds similarly as in phase 204 by increasing the speed of the first electric machine and reducing the speed of the second electric machine.
  • the rolling mill is again in an RR mode.
  • Possibilities of a fine-step or continuous speed adjustment of both corrugating rollers are represented by individual adjustment of the rotational frequencies of the two electric machines.
  • a mode for gently grinding wheat in RR mode during ongoing production into one SS mode with intensive grinding work for example for the milling of rye, to be transferred.
  • the translations can be infinitely adjusted during operation via potentiometers or by the specification of recipe-based fixed frequencies. This means that fixed programmed ratios can be stored, which are automatically changed when selecting a recipe (for example, when switching from wheat to rye), for example from a computer via the interfaces 42, 46 (see FIG. 2 ).

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Control Of Multiple Motors (AREA)
  • Crushing And Grinding (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP16182798.5A 2015-08-05 2016-08-04 Broyeur a cylindres ayant un mode de fonctionnement couper/couper et mode de fonctionnement dos/dos Active EP3127614B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16182798T PL3127614T5 (pl) 2015-08-05 2016-08-04 Młyn walcowy z trybem pracy ostrza-ostrza i trybem pracy grzbiety-grzbiety

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015010157.9A DE102015010157A1 (de) 2015-08-05 2015-08-05 Walzenstuhl mit Schneiden-Schneiden-Betriebsart und Rücken-Rücken-Betriebsart

Publications (4)

Publication Number Publication Date
EP3127614A2 true EP3127614A2 (fr) 2017-02-08
EP3127614A3 EP3127614A3 (fr) 2017-04-12
EP3127614B1 EP3127614B1 (fr) 2018-04-18
EP3127614B2 EP3127614B2 (fr) 2020-11-18

Family

ID=56571249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16182798.5A Active EP3127614B2 (fr) 2015-08-05 2016-08-04 Broyeur a cylindres ayant un mode de fonctionnement couper/couper et mode de fonctionnement dos/dos

Country Status (4)

Country Link
EP (1) EP3127614B2 (fr)
DE (1) DE102015010157A1 (fr)
HU (1) HUE038226T2 (fr)
PL (1) PL3127614T5 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108787005A (zh) * 2018-07-03 2018-11-13 山东永平再生资源股份有限公司 废旧物料粉碎机
CN109062134A (zh) * 2018-09-20 2018-12-21 安徽马钢设备检修有限公司 一种新型四辊破碎电控系统及控制方法
CN118320907A (zh) * 2024-04-29 2024-07-12 上海重衡冶金工程技术有限公司 一种金属材料快速粉碎装置

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
DE174199C (fr)
GB261753A (en) 1926-11-17 1927-12-01 Richard Schermann Improvements relating to the fine grinding of corn
DE678825C (de) 1938-05-29 1939-07-26 Otto Moog Dr Ing Verfahren und Vorrichtung zum Einstellen von Walzenstuehlen mit stufenlos regelbaren UEbersetzungen
DE859558C (de) 1949-06-04 1952-12-15 Miag Vertriebs Gmbh Verbindungstrieb fuer die Walzenpaare von Walzenstuehlen
DE824290C (de) 1949-11-26 1951-12-10 Zuendapp Werke G M B H Mahlanlage zum Schroten und Vermahlen von Getreide und Getreideprodukten
DE1033995B (de) 1953-12-05 1958-07-10 Ludwig Schoeffel Mehrwalzenmisch- und -reibmaschine
WO2009068921A1 (fr) 2007-11-26 2009-06-04 Kertesz Andras Broyeur cylindrique à grande vitesse
WO2009067828A1 (fr) 2007-11-27 2009-06-04 Bühler AG Broyeur à cylindres
DE102007061668A1 (de) 2007-12-18 2009-06-25 Bühler AG Walzenstuhl
US8113447B1 (en) 2009-11-05 2012-02-14 Cereal Enterprises, Inc. Corn milling process
US9486806B1 (en) 2011-04-01 2016-11-08 Claas Saulgau Gmbh System and method for processing crop materials into livestock feed and the product thereof

Non-Patent Citations (1)

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Title
None

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108787005A (zh) * 2018-07-03 2018-11-13 山东永平再生资源股份有限公司 废旧物料粉碎机
CN109062134A (zh) * 2018-09-20 2018-12-21 安徽马钢设备检修有限公司 一种新型四辊破碎电控系统及控制方法
CN118320907A (zh) * 2024-04-29 2024-07-12 上海重衡冶金工程技术有限公司 一种金属材料快速粉碎装置

Also Published As

Publication number Publication date
HUE038226T2 (hu) 2018-10-29
EP3127614B2 (fr) 2020-11-18
PL3127614T3 (pl) 2018-09-28
EP3127614B1 (fr) 2018-04-18
EP3127614A3 (fr) 2017-04-12
PL3127614T5 (pl) 2021-08-30
DE102015010157A1 (de) 2017-02-09

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