EP0072504A2 - Broyeur à cylindres pour le broyage de matières fluides - Google Patents

Broyeur à cylindres pour le broyage de matières fluides Download PDF

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Publication number
EP0072504A2
EP0072504A2 EP82107084A EP82107084A EP0072504A2 EP 0072504 A2 EP0072504 A2 EP 0072504A2 EP 82107084 A EP82107084 A EP 82107084A EP 82107084 A EP82107084 A EP 82107084A EP 0072504 A2 EP0072504 A2 EP 0072504A2
Authority
EP
European Patent Office
Prior art keywords
rolling mill
gap
mill according
bearings
rollers
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.)
Withdrawn
Application number
EP82107084A
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German (de)
English (en)
Other versions
EP0072504A3 (fr
Inventor
Gmbh Draiswerke
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.)
Draiswerke GmbH
Original Assignee
Draiswerke 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
Application filed by Draiswerke GmbH filed Critical Draiswerke GmbH
Publication of EP0072504A2 publication Critical patent/EP0072504A2/fr
Publication of EP0072504A3 publication Critical patent/EP0072504A3/fr
Withdrawn legal-status Critical Current

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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
    • B02C4/32—Adjusting, applying pressure to, or controlling the distance between, milling members

Definitions

  • the invention relates to a rolling mill for comminuting liquid substances according to the preamble of claim 1.
  • the desired size reduction can be wet or dry size reduction.
  • Liquid substances are understood to be flowable or free-flowing or pasteous substances, the latter being no longer flowable in the borderline case.
  • Another problem is that it is not possible to keep the width of the gap constant during operation with the rolling mills for rubbing and shearing goods, for example for the fine grinding of paste-like color masses, these being gap widths in the range from below 5 0 pm.
  • Such an exact gap width setting over a longer operating period and over the full length of the gap is, however, fundamentally desirable, since if this requirement is met, a gap could be set to the maximum width based on the requirements of the material to be treated, which in turn also leads to an increase of the roller speeds while reducing the required roller lengths, which would also make it possible to achieve a higher throughput overall.
  • the invention is therefore based on the object of designing a rolling mill of the generic type in such a way that the width of the gap can be set exactly and this setting can be kept exactly even over longer operating times.
  • the essence of the invention lies in the fact that the gap width control takes place by using a longitudinal expansion of an otherwise pre-stressed system.
  • This can be realized according to claim 1 by the fact that the distance of the bearings which are assigned to one another in pairs can be changed continuously or discontinuously during operation, whereby either the gap widths are continuously changed according to the requirements of the operation or - in the reverse direction - continuously again at a predetermined value Alternatively or also cumulatively, this gap width adjustment can be carried out by changing the diameter of at least one roller also continuously or discontinuously.
  • the distance adjustment of the bearings associated with one another can be carried out by the measures according to claims 3 and 4, claim 5 specifying the possibility of an operating variable-dependent control or regulation.
  • the claims 6 to 8 specify measures how the most important company sizes can be recorded.
  • Claim lo indicates how the distance adjustment of the bearings is solved in a structurally simplest manner.
  • Claim 11 teaches a very simple way to change the diameter of at least one roller for gap width adjustment.
  • a two-roll mill which thus has two rolls 1, 2.
  • These two cylindrical rollers 1, 2 are rotatably mounted with bearing pins 3 located at their respective ends in corresponding bearings 4, 5, which are arranged in bearing blocks 6, 6 'and 7, 7'.
  • the bearing blocks 6, 7 and 6 ', 7' are accommodated in stands 8, each of which is surrounded by a housing 9 or 10.
  • the bearing blocks 6, 6 'of one roller 1 are fixed, ie immovably arranged in the respective stand 8, while the other bearing blocks 7, 7' of the other roller 2 are arranged displaceably in the respective stand 8. They can be moved parallel to the plane that is spanned by the axes of rotation 12, 13 of the rollers 1, 2 in accordance with the directional arrow 11.
  • the bearing blocks 7, 7 'of the roller 2 are supported by means of so-called needles 14, that is to say by means of cylindrical rollers of small diameter of 1 to 2 mm which are long in relation to their diameter, on corresponding guide surfaces 15 in the stand 8.
  • the bearing of the one roller 2 is thus designed as a so-called sliding bearing. It is thus possible to move the rollers 1, 2 by moving the bearing blocks 7, 7 'accordingly. form a gap and change its size.
  • the oppositely directed drive of the parallel arranged rollers 1, 2 is carried out in accordance with the direction of rotation arrows 16, 17 arranged by means of the larger housing 1 0 electric motor 18 1.
  • the two rollers are connected via a belt drive 19 to a roller in a rotationally fixed by means of gears 2o same diameter coupled with each other, so that when the one roller 1 is driven, the other roller is driven at the same speed but in the opposite direction of rotation 17.
  • bearing blocks 6, 7 and 6 ', 7' which are assigned to one another in pairs, are each of identical design, so that it is sufficient for the following description to describe the bearing blocks 6, 7 with bearings 4, 5, which are shown more clearly in FIG. 1.
  • These bearing blocks 6, 7 are connected to one another by means of tie rods 21, 22 which run parallel to the plane spanned by the two axes of rotation 12, 13 and perpendicular to the axes of rotation 12, 13, that is to say in the direction of displacement 11. They are each arranged symmetrically to this plane spanned by the axes of rotation 12, 13, that is to say at the same distance from the axes of rotation 12, 13.
  • Means are provided between the bearing blocks 6, 7, which are assigned to one another in pairs, in order to exert distance adjusting forces acting thereon in the direction 11, as a result of which the width of a gap 25 between the rollers 1, 2 can be adjusted.
  • These devices can be a special design of the tie rods 21 or 22.
  • the tie rods 21 and 22 are provided in their central region between the holding pins 24 with a cylindrical cavity 26 into which a pressure oil connection 27 opens. When this cavity 26 is pressurized with pressure oil, the tie rod 21, 22 is stretched depending on the pressure of the pressure oil, i. H. extended.
  • a cavity 26 is arranged in the tie rod 21 or 22 in the same way, in which an electric heater 28 is arranged.
  • the cavity 26 is otherwise also filled with an oil, which serves as heat transfer to the outer wall 29 of the part of the tie rod 21 or 22 delimiting the cavity 26.
  • one of the applications of the length-adjustable tie rods 21, 22 is shown schematically.
  • a material to be treated on the rolling mill is introduced between the rollers 1, 2 from above.
  • the width of the gap 25 is generally less than 0.1 mm. If, on the basis of a normal value of the temperature of the material to be treated, the temperature of the material to be added rises, the temperature of the rollers 1, 2 thus rises, with the result that the distance between their axes of rotation 12, 13 is the same Width of the gap 25 becomes smaller.
  • a temperature sensor 3o is arranged above the roller gap, which measures the temperature of the material being fed and emits a corresponding signal to a control or regulating device 31.
  • This device 31 controls the change in length of the tie rods 21 and 22 accordingly, in this embodiment the tie rods in the heatable embodiment according to FIG. 3 are expediently used. So is the control device has a heating and elongation of the tie rod which leads to an A usurschieben the bearing 4.5 and thus an enlargement of the gap 25, or a non-heating, that is, a cooling and contraction while reducing the roll gap 25 triggered.
  • the width of the gap 25 between the rollers 1 and 2 not only changes due to operational reasons, but - as indicated in FIG. 5 - changes differently along its length, then further measures can be provided.
  • Such differences in the parallelism of the roll surfaces delimiting the gap 25 lead to the fact that in the two end regions of the gap 25 different amounts of the material to be treated are carried through per unit of time, which is indicated by the amounts M 1 and M 2 , where M applies in the present case 1 > M 2 .
  • a throughput measuring device 32 is arranged below the gap 25 in each of the two end regions of the rollers 1, and the part of the treated material passing through the gap 25 is fed into the funnel 33 through a funnel 33 whose width is precisely defined becomes.
  • This good is in the throughput measuring device 32 in the usual way measured, this device can contain, for example, a belt scale in a known manner or - for liquid goods - can be designed as an oval wheel counter. From this throughput measuring device, a signal corresponding to the throughput is then sent to the control or regulating device 31, from which the tie rods 21, 22 of a pair of bearing blocks 6, 7 are then given. In this case, the tie rod pairs 21, 22 of each pair of bearing blocks 6, 7 or 6 ', 7' are controlled separately, so that in this way the parallelism of the gap 25 can be maintained over its full length.
  • g 32 may also be a Mahlfös measuring device are provided 32 ', which detects the particle size of the treated material, with significant deviations of the particle size in a hopper 33 are compared to the other hopper 33ein measure for the non-parallelism of the gap 25th It should be emphasized here that the deviations in the gap width of the gap 25 are deviations in the range of a few hundredths of a millimeter which are to be compensated for.
  • Such grinding fineness measuring devices are commercially available and, for example, in the Weinmann article in the magazine POWDER METALLURGY INTERNATIONAL Vol. Lo, No. 2/1978.
  • FIG. 7 also shows an application example in which the material to be treated between the rollers 1, 2 is fed continuously from a container 35 to the rollers 1, 2 by means of a pump 34.
  • the material treated in the gap 25 is drawn off and pumped back into the container 35 by means of a pump 36. Since in this way the material to be treated is treated several times between the rollers 1, 2 in the gap 25, the gap 25 is made narrower as a function of time.
  • the control device 31 operates in a time-dependent manner.
  • rollers 1, 2 can be tempered.
  • the rollers 1, 2 are hollow.
  • a feed line 39 for bath fluid protrudes into its inner cavity 37 through a channel 38 in the bearing journal 3 and has nozzles 40 arranged at a distance from one another along its length and directed essentially upwards.
  • a temperature sensor 41 is arranged, which is connected to a control device 43 for a thermostat by means of a line 42, which is also led out through the channel 38 into the bearing journal 3 44 is connected.
  • the channel 38 in the journal 3 leads to a return line 45 for bath fluid, which leads to the thermostat 44.
  • a flow line 46 in turn leads via a valve 47 to the supply line 39.
  • the valve 47 is also controlled by the control unit 43.
  • the heat transfer liquid is sprayed through the nozzles 4o against the respective inner side of the roller 1 or 2 above and otherwise fills the cavity 37 of the roller 1 or 2 about half because the Longitudinal axis 12 extending channel 38 only extends to just below the axis.
  • the excess amount flows through this channel 38
  • Temperature control medium to the return line 45 and from there to the thermostat 44, where it is reheated and returned via the valve 47. To keep the temperature of the roller 1 or 2 constant and then to keep its diameter constant, this simple temperature control described is sufficient.
  • a throughput measuring device 32 or a fineness measuring device 32 ' is arranged below the nip 25 and - as described above - emits a signal to the control device 43 in the event of deviations from the predetermined target value, then depending on the deviation changes the temperature to which the bath liquid in the thermostat 44 is heated. If the grinding fineness measuring device 32 'indicates a too large particle size or the throughput measuring device 32 shows a too high throughput, this means that the gap 25 is too large with the consequence that the diameter of the roller must be increased. The flow temperature of the temperature control medium is therefore increased. If the throughput or the particle size becomes too small, the gap must be enlarged; the diameter of the roller 1 or 2 must therefore be reduced.
  • a clamping device 48 is arranged in the simplest manner between the bearing blocks 6, 7, which is generally a very compact, hydraulically actuatable cylinder-piston drive.
  • the tensioning device is arranged where tie rods 21, 22 are provided, in the plane of these tie rods, so that no bending moments are exerted on the rollers 1, 2.
  • such tensioning devices 48 are each arranged in the common main-center plane of the rollers 1, 2.
  • tensioning device 48 is only shown in FIG. 1.
  • rollers 1, 2 instead of driving the rollers 1, 2 with the same peripheral speed, it is of course also possible, in practice, to drive the two rollers with different peripheral speeds, so that a differential speed between the rollers 1, 2 occurs in the nip 25.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
EP82107084A 1981-08-14 1982-08-05 Broyeur à cylindres pour le broyage de matières fluides Withdrawn EP0072504A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813132210 DE3132210A1 (de) 1981-08-14 1981-08-14 "walzwerk zum zerkleinern von fluessigen stoffen"
DE3132210 1981-08-14

Publications (2)

Publication Number Publication Date
EP0072504A2 true EP0072504A2 (fr) 1983-02-23
EP0072504A3 EP0072504A3 (fr) 1984-09-05

Family

ID=6139348

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107084A Withdrawn EP0072504A3 (fr) 1981-08-14 1982-08-05 Broyeur à cylindres pour le broyage de matières fluides

Country Status (3)

Country Link
EP (1) EP0072504A3 (fr)
JP (1) JPS5836648A (fr)
DE (1) DE3132210A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT412483B (de) * 2003-03-26 2005-03-25 Andritz Ag Maschf Verfahren und vorrichtung zur mahlung von faserstoffen
WO2013034669A1 (fr) 2011-09-09 2013-03-14 Bühler AG Rouleau
WO2012152951A3 (fr) * 2011-05-12 2013-06-06 Bühler AG Dispositif et procédé pour broyer des particules dans un matériau coulant
CN107649234A (zh) * 2017-10-13 2018-02-02 徐州东南钢铁工业有限公司 一种破碎机破碎粒径自动调节装置及方法
CN115043177A (zh) * 2022-06-28 2022-09-13 杭州富丽达热电有限公司 一种精确计量煤炭输送系统

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62213853A (ja) * 1986-03-14 1987-09-19 株式会社　サタケ 粉砕機の粉砕度自動調節装置
JPH0422041U (fr) * 1990-06-18 1992-02-24
CN102458253B (zh) * 2009-05-15 2014-12-10 葛兰素史密斯克莱有限责任公司 使用热成像仪控制制造过程

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2610801A (en) * 1949-03-12 1952-09-16 Edmund E Edmiston Roller mill
FR2131692A5 (fr) * 1971-03-29 1972-11-10 Procter & Gamble
DE2449344A1 (de) * 1974-10-17 1976-04-22 Ver Flugtechnische Werke Oelmahlwerk mit einer automatischen stelleinrichtung
GB2074761A (en) * 1980-04-30 1981-11-04 Buehler Ag Geb Control of roll gap

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB514933A (en) * 1938-11-22 1939-11-21 Heinz Gehle A method for the production of uniform milling products
GB935363A (en) * 1959-11-02 1963-08-28 Emilio Cavalieri Improved refining machine particularly for chocolate and like substances
GB1010768A (en) * 1963-05-02 1965-11-24 Rose Downs & Thompson Ltd Rolling equipment
DE1507583A1 (de) * 1966-08-26 1969-07-24 F B Lehmann Gmbh Einrichtung zum Regeln des Walzenspaltes von Walzwerken fuer pasten- oder teigartiges Mahlgut

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2610801A (en) * 1949-03-12 1952-09-16 Edmund E Edmiston Roller mill
FR2131692A5 (fr) * 1971-03-29 1972-11-10 Procter & Gamble
DE2449344A1 (de) * 1974-10-17 1976-04-22 Ver Flugtechnische Werke Oelmahlwerk mit einer automatischen stelleinrichtung
GB2074761A (en) * 1980-04-30 1981-11-04 Buehler Ag Geb Control of roll gap

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT412483B (de) * 2003-03-26 2005-03-25 Andritz Ag Maschf Verfahren und vorrichtung zur mahlung von faserstoffen
WO2012152951A3 (fr) * 2011-05-12 2013-06-06 Bühler AG Dispositif et procédé pour broyer des particules dans un matériau coulant
CN103547372A (zh) * 2011-05-12 2014-01-29 布勒股份公司 用于粉碎可流动物料中的颗粒的装置和方法
CN103547372B (zh) * 2011-05-12 2016-11-09 布勒股份公司 用于粉碎可流动物料中的颗粒的装置和方法
RU2603727C2 (ru) * 2011-05-12 2016-11-27 Бюлер Аг Устройство и способ измельчения частиц в текучем материале
US10159985B2 (en) 2011-05-12 2018-12-25 Bühler AG Device and method for comminuting particles in liquid material
WO2013034669A1 (fr) 2011-09-09 2013-03-14 Bühler AG Rouleau
CN103917103A (zh) * 2011-09-09 2014-07-09 布勒股份公司 辊
RU2604606C2 (ru) * 2011-09-09 2016-12-10 Бюлер Аг Валок
CN107649234A (zh) * 2017-10-13 2018-02-02 徐州东南钢铁工业有限公司 一种破碎机破碎粒径自动调节装置及方法
CN107649234B (zh) * 2017-10-13 2019-05-07 徐州东南钢铁工业有限公司 一种破碎机破碎粒径自动调节装置及方法
CN115043177A (zh) * 2022-06-28 2022-09-13 杭州富丽达热电有限公司 一种精确计量煤炭输送系统

Also Published As

Publication number Publication date
EP0072504A3 (fr) 1984-09-05
JPS5836648A (ja) 1983-03-03
DE3132210A1 (de) 1983-03-03

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