EP0425626A1 - Walzenmühle. - Google Patents

Walzenmühle.

Info

Publication number
EP0425626A1
EP0425626A1 EP90907016A EP90907016A EP0425626A1 EP 0425626 A1 EP0425626 A1 EP 0425626A1 EP 90907016 A EP90907016 A EP 90907016A EP 90907016 A EP90907016 A EP 90907016A EP 0425626 A1 EP0425626 A1 EP 0425626A1
Authority
EP
European Patent Office
Prior art keywords
pulley
roller
shaft
teeth
axis
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
EP90907016A
Other languages
English (en)
French (fr)
Other versions
EP0425626B1 (de
Inventor
Ferruccio Ginelli
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.)
Ocrim SpA
Original Assignee
Ocrim SpA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11168760&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0425626(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ocrim SpA filed Critical Ocrim SpA
Priority to AT90907016T priority Critical patent/ATE96342T1/de
Publication of EP0425626A1 publication Critical patent/EP0425626A1/de
Application granted granted Critical
Publication of EP0425626B1 publication Critical patent/EP0425626B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B02C4/42—Driving mechanisms; Roller speed control

Definitions

  • the present invention relates to a roller mill device for the grinding or refining of granular agricultural food materials.
  • a roller mill which uses at least one pair of fluted or smooth milling rollers which rotate at mutually different angular speeds.
  • Roller mills which use one or two pairs of rollers, generally two pairs, in which the rollers rotate in opposite directions at mutually different speeds, are well-known.
  • the use of different speeds between the two rollers has in fact long ago been found to be particularly effective in the effect of grinding or refining cereals and the like.
  • a pair of gears each supported rigidly to the shaft of one of the two rollers, is generally used to motorize a pair of grinding rollers and to simultaneously set their relative speed.
  • the pair of rollers wears down with use, so that in order to keep constant the grinding gap between the surfaces of the two rollers the distance of the axes of the rollers must be adjusted. In practice the axes of the shafts of the rollers must be moved progressively closer as the surfaces of the rollers wear.
  • the center distance between the grinding rollers is not constant but decreases progressively entails a particularly configuration of the pair of gears supported by the shafts of the rollers in order to avoid the need to change the gears every time the center distance between the rollers is to be adjusted.
  • the pair of gears used has particularly long teeth so that the coupling between the gears may be "loose” on the new mill, whereas the coupling between the gears becomes increasingly “tighter” and the teeth of the two gears interpenetrate to an increasing depth as the center distance between the rollers decreases.
  • gears with the particular described configuration are extremely noisy and contribute to the forming of hearing damages (hypacusia) and often raise noise levels above the values set by specific laws for operators assigned to these machines. Said gears furthermore require adequate lubrication, are subject to rapid wear and are difficult to find, when they are to be replaced, due to their particular configuration.
  • a belt transmission, stretched between two pulleys each of which is mounted at a shaft of one of the two rollers has been proposed in three variations.
  • the belt is kept under tension by two other transmission pulleys.
  • the assembly constituted by the belt and the total of four pulleys is so bulky that it cannot be contained in the normal useful space of a normal mill, so that this solution is not likely to enjoy actual industrial development.
  • the belt is kept under tension by a single transmission pulley.
  • This solution does have small and practically acceptable dimensions, but in practice only a small part of the useful power of the mill can be transmitted, and the mill therefore operates at minimum capacity. If the transmitted power is increased to the values normally used with gear transmission, the belt wears out rapidly and burns.
  • the roller which rotates faster is driven directly by the motive power and its shaft supports a first pulley which has a set of teeth with grooves which are parallel to the axis of the roller's shaft.
  • the shaft of the roller which rotates slower supports a second pulley which has a set of teeth with grooves which are perpendicular to the axis of the roller's shaft.
  • the aim of the present invention is to overcome the above disadvantages by providing a roller mill which does not entail the presence of noisy gears and allows to transmit all the useful power to the mill without using lubricants.
  • Another object of the invention is to provide a mill wherein maintenance, adjustment of the center distance between the rollers and replacement of spare parts are particularly economical and simple.
  • the device which comprises: at least one pair of fluted or smooth milling rollers which rotate at mutually different speeds, the roller which rotates faster being driven directly by the motive power, and is characterized in that: the shaft of said roller which rotates faster supports a first pulley which has a set of teeth with grooves perpendicular to the axis of the shaft of the roller; the shaft of the roller which rotates slower supports a second pulley which has a set of teeth with grooves parallel to the axis of the shaft of the roller; the belt stretched between said pulleys is kept under tension by a third transmission pulley which is adjustable in position.
  • figure 1 is a perspective side view of the device according to the invention
  • figure 2 is a perspective view of the pulleys of figure 1.
  • the device according to the invention comprises a pair of milling rollers and preferably two pairs of fluted or smooth rollers which rotate at mutually different speeds.
  • the rollers are not directly visible in the figures, but the shafts 11, 12 of the first pair of rollers and the shafts 13, 14 of the second pair of rollers are shown.
  • the roller supported by the shaft 12, which rotates faster is driven directly by the motive power by means of a pulley or a gear, not illustrated in the drawing.
  • the shaft of the roller which rotates faster supports a first pulley 15 which has a set of teeth with grooves 16 which are perpendicular to the axis of the shaft 12 of the roller.
  • the shaft 11 of the roller which rotates slower supports a second pulley 17 which has a set of teeth with grooves 18 which are parallel to the axis of the shaft 11 of the roller.
  • the belt 19 which is stretched between the pulleys 15 and 17 is kept under tension by a third transmission pulley 20.
  • the position of the third pulley 20 with respect to the position of the other two pulleys 15 and 17 can be adjusted so as to easily control the tension of the belt 19.
  • the third pulley 20 has a set of teeth with grooves 21 perpendicular to its axis 22.
  • the center distance between the first pulley 15 and the second pulley 17 is comprised between 210 mm and 310 mm.
  • the center distance between the second pulley 17 and the third pulley 20 is comprised between 230 mm and 300 mm.
  • the ratio between the rp rate of the first pulley 15 and the rpm rate of the second pulley 17 is comprised between 1.1 and 3.5.
  • the belt 19 has a set of teeth which matches the grooves of the pulleys which it is to engage; in particular, once the belt 19 is mounted on the pulleys 15, 17 and 20, the internal set of teeth is perpendicular to the axes of the pulleys, whereas the outer set of teeth is parallel to the axes of the pulleys.
  • the device according to the invention allows to achieve the intended aim and objects and in particular allows quiet operation and the transmission of all the useful power of the mill for long periods of time without requiring particular maintenance .

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Massaging Devices (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Ceramic Capacitors (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
EP90907016A 1989-05-19 1990-05-12 Walzenmühle Expired - Lifetime EP0425626B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90907016T ATE96342T1 (de) 1989-05-19 1990-05-12 Walzenmuehle.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8920558A IT1230778B (it) 1989-05-19 1989-05-19 Dispositivo a laminatoio
IT2055889 1989-05-19

Publications (2)

Publication Number Publication Date
EP0425626A1 true EP0425626A1 (de) 1991-05-08
EP0425626B1 EP0425626B1 (de) 1993-10-27

Family

ID=11168760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90907016A Expired - Lifetime EP0425626B1 (de) 1989-05-19 1990-05-12 Walzenmühle

Country Status (8)

Country Link
EP (1) EP0425626B1 (de)
AT (1) ATE96342T1 (de)
AU (1) AU5645990A (de)
DE (1) DE69004213T2 (de)
DK (1) DK0425626T3 (de)
ES (1) ES2048491T3 (de)
IT (1) IT1230778B (de)
WO (1) WO1990014165A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19753958A1 (de) * 1997-12-05 1999-06-10 Buehler Ag Walzenstuhl
JP4692794B2 (ja) * 2000-06-07 2011-06-01 株式会社サタケ 脱ぷ装置
EP3380245B1 (de) * 2015-11-26 2022-08-17 Omas Srl Walzenmühle mit direktantriebsmotoren
ITUB20156031A1 (it) * 2015-11-30 2017-05-30 Omas Srl Laminatoio con motori a trascinamento diretto migliorato e metodo di funzionamento del laminatoio
EP3401017B1 (de) 2017-05-09 2019-08-28 Bühler AG Futter- und lebensmittelwalzenmühle mit einem getriebe
IT202100012893A1 (it) * 2021-05-19 2022-11-19 V Project S R L Macchina per la macinazione di prodotti alimentari
TR2021013915A2 (tr) * 2021-09-04 2021-09-21 Degirmencioglu Makina Sanayi Ve Ticaret Ltd Sirketi Tahıl öğütme makinesi

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB542044A (en) * 1940-07-29 1941-12-23 Thomas Robinson & Son Ltd Improvements relating to roller mills for cereal grain
GB541583A (en) * 1940-07-29 1941-12-02 Thomas Robinson & Son Ltd Improvements relating to the drives of the rolls of roller mills
US3151491A (en) * 1958-08-04 1964-10-06 Us Rubber Co Belt and belt-pulley drive
IT8320736V0 (it) * 1983-02-08 1983-02-08 Berga Cereali Spa Laminatoio per macinazione di cereali con rulli ad interasse variabile.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9014165A1 *

Also Published As

Publication number Publication date
DE69004213T2 (de) 1994-05-05
WO1990014165A1 (en) 1990-11-29
DE69004213D1 (de) 1993-12-02
AU5645990A (en) 1990-12-18
EP0425626B1 (de) 1993-10-27
IT1230778B (it) 1991-10-29
ES2048491T3 (es) 1994-03-16
IT8920558A0 (it) 1989-05-19
ATE96342T1 (de) 1993-11-15
DK0425626T3 (da) 1994-03-07

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