EP0169517B1 - Fliehkraft-Rührapparat - Google Patents

Fliehkraft-Rührapparat Download PDF

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Publication number
EP0169517B1
EP0169517B1 EP85109086A EP85109086A EP0169517B1 EP 0169517 B1 EP0169517 B1 EP 0169517B1 EP 85109086 A EP85109086 A EP 85109086A EP 85109086 A EP85109086 A EP 85109086A EP 0169517 B1 EP0169517 B1 EP 0169517B1
Authority
EP
European Patent Office
Prior art keywords
centrifugal mixer
mixer according
stirring plates
treatment
stirring
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
Application number
EP85109086A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0169517A3 (en
EP0169517A2 (de
Inventor
Paul Prof. Dr.-Ing. Schmidt
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.)
Dr-Ing Manfrid Dreher & Co KG GmbH
Original Assignee
Dr-Ing Manfrid Dreher & Co KG 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 Dr-Ing Manfrid Dreher & Co KG GmbH filed Critical Dr-Ing Manfrid Dreher & Co KG GmbH
Priority to AT85109086T priority Critical patent/ATE37313T1/de
Publication of EP0169517A2 publication Critical patent/EP0169517A2/de
Publication of EP0169517A3 publication Critical patent/EP0169517A3/de
Application granted granted Critical
Publication of EP0169517B1 publication Critical patent/EP0169517B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/10—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
    • B24B31/108—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work involving a sectioned bowl, one part of which, e.g. its wall, is stationary and the other part of which is moved, e.g. rotated

Definitions

  • the invention relates to a centrifugal mixer according to the preamble of claim 1.
  • Such an agitator is known for example from DE-A1-3 320 891.
  • the apparatus is based on the principle of the so-called "surface grinding", with the aid of which surface polishing of workpieces and comminution, granulation or agglomeration of particles can be carried out.
  • Typical of the process of surface grinding is the constant circulation and mixing of a bed of particles or workpieces under predominantly shear stress, which is often noticeable in a rolling of the treated particles or workpieces.
  • Treatment agents for example polishing agents or polishing bodies, can also be added, in particular when tumbling workpieces.
  • their shape changes towards greater spherical similarity.
  • the particle size decreases during vibratory grinding and crushing, usually during granulation or agglomeration.
  • a centrifugal mixer according to the preamble of claim 1 is known from US-A-4 385 472.
  • this apparatus has only a single opening, which is both an inlet and a discharge opening and must be kept closed during operation.
  • Centrifugal stirrers are particularly cheap. They consist of a cylindrical vessel with a rotating stirring tool, usually in the form of a stirring plate on the bottom of the vessel.
  • the bulk material to be treated executes a toroidal movement in it. This is characterized by the Froude number, which is defined as the ratio of centrifugal to gravitational acceleration. It is of the order of about 10 to 100.
  • the specific volume output is very important for the processes. The aim is to achieve the highest possible values, around 100 KW / m 3 .
  • centrifugal agitators can only be operated in batches, only have a low specific volume capacity and are subject to high wear in agitating tools with a convex profile.
  • Batch operation is understood to mean that the apparatus has to be filled with the bulk material in a cumbersome and time-consuming manner, usually manually, before the start of the treatment and emptied again after the end of the treatment.
  • continuous operation with, in particular, automatic input and output of the goods to be treated has not been possible.
  • the material to be treated can be input continuously or in batches and can be continuously withdrawn after passing through the apparatus comprising several stirring plates.
  • the quality and intensity of the treatment can be controlled by changing the number of stirring stations passing through, by changing the speed and direction of rotation of the stirring plates and by adjusting the cross-section and the level of the overflow openings accordingly.
  • the side by side arrangement of several work vessels with stirring plates allows the required dwell time of the treated material to be set accordingly in the treatment stations lying next to one another.
  • FIG. 1 shows a frame or a base frame 1, on which a total of 5 stirring plates 2 are rotatably mounted next to one another.
  • pot-shaped or cylindrical working vessels 3 are arranged around the stirring plate 2, in which the particles or workpieces 4 to be treated are in the form of a bed.
  • the individual working vessels 3 are, as indicated schematically in FIG. 2, connected to one another by constrictions or constrictions 8 in the form of overflow openings.
  • the bed is introduced into the stirrer at an input opening A on the first working vessel 3 and, after completion of the treatment, into one on the last working vessel provided delivery opening B deducted.
  • the discharge can preferably also take place in the direction of the dashed arrow B, that is to say in the direction in which the bulk material flows through the individual working vessels 3.
  • a motor 5 drives the individual stirring plates 2 via a belt or a chain 6.
  • a known device 7, for. B. a screw spindle allows to change the setting of the stirrer with respect to the horizontal, so that the direction of flow of the bulk material over the individual stirrer plate can be inclined slightly downwards with the assistance of gravity.
  • the axes of rotation of the individual stirring plates are provided with the reference number 9.
  • FIG. 3 shows in detail a constriction 8 forming the overflow opening between two working vessels 3.
  • the overflow opening has a width b at this point.
  • the diameter of the working vessel is D
  • the center distance of two stirring plates is a
  • the height of the working vessels 3 is designated H ( Figure 1).
  • the number of stirring plates 2 can be between 5 and 15, preferably between 8 and 12.
  • the drive of the stirring plate can be designed as a group drive by means of a single motor 5 or as an individual drive by means of several electric motors from below or above.
  • FIGS. 4 to 7 show different stirring plates, the working surface of which is not convex in the circumferential direction, that is to say concave or hollow.
  • the spatial shapes of the work surfaces are, as is also apparent from FIGS. 4 to 9, not rotationally symmetrical with respect to the axis of rotation 9.
  • the working surface of the stirring plate 2 is an oblique truncated cone in FIG. 4, an elliptical truncated cone in FIG. 5, a truncated pyramid in FIG. 6 and an arena in FIG. 7.
  • work surfaces that are rotationally symmetrical to the axis of rotation 9 are also suitable.
  • a total of twelve working vessels 3 with stirring plates 2 are arranged one behind the other in FIG ° is offset. In this way, input opening A and output opening B are conveniently next to one another and the arrangement is overall space-saving.
  • FIG. 9 schematically shows an overflow opening 11 arranged at a constriction between two adjacent working vessels 3.
  • the lower edge of the opening 11, that is to say the relative height of the overflow opening can be closed by a first diaphragm 12 which can be moved up and down in the direction of the double arrow C. the neighboring stirring plate can be changed.
  • the opening cross section of the overflow opening 11 can be changed by means of a diaphragm 13 which can be displaced in the direction of the arrow D.
  • the same can be done with the aid of a diaphragm 15 pivotably mounted at 14 in the direction of arrow E.
  • the dwell time of the bulk material in the stirrer can be set in the desired manner by appropriately setting the opening cross section.
  • successive stirring plates 2 each have opposite directions of rotation without or with a speed difference. It is achieved in this way that the bulk material is subjected to uniform shearing stress as it passes through the working vessels 3.
  • stirring plates 2 have the same directions of rotation without or with a speed difference. For some bulk goods, a temporary impact from impact is advisable. This is achieved by such an embodiment.
  • the working surface of the stirring plate 2 is not convex in the circumferential direction and is not designed as a rotating body with respect to the axis of rotation 9. As a result, a positive transmission of the torque from the stirring plate to the bed is achieved without the need for convex parts subject to wear.
  • the working vessels 3 are designed as a straight or annular channel (FIG. 8).
  • the channel common to all stirring plates 2 has a constricted overflow opening 11 between two stirring plates. Restricted means that the diameter of the overflow opening 11 is smaller than the diameter D of the working vessel and the height H.
  • the narrowed overflow openings between the individual working vessels finally enable control of the bulk material passing through in such a way that the material between the individual stirring plates is essentially uniform and forward without any return flow
  • the overflow opening 11 (FIG. 9) need not be limited by straight edges. The limitation could also be done by curved edges so that the overflow opening is round or oval.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Crushing And Grinding (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP85109086A 1984-07-26 1985-07-20 Fliehkraft-Rührapparat Expired EP0169517B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85109086T ATE37313T1 (de) 1984-07-26 1985-07-20 Fliehkraft-ruehrapparat.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3427568 1984-07-26
DE19843427568 DE3427568A1 (de) 1984-07-26 1984-07-26 Ruehrapparat

Publications (3)

Publication Number Publication Date
EP0169517A2 EP0169517A2 (de) 1986-01-29
EP0169517A3 EP0169517A3 (en) 1986-12-03
EP0169517B1 true EP0169517B1 (de) 1988-09-21

Family

ID=6241631

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85109086A Expired EP0169517B1 (de) 1984-07-26 1985-07-20 Fliehkraft-Rührapparat

Country Status (5)

Country Link
US (1) US4747695A (ja)
EP (1) EP0169517B1 (ja)
JP (1) JPS61109661A (ja)
AT (1) ATE37313T1 (ja)
DE (2) DE3427568A1 (ja)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5401206A (en) * 1993-10-25 1995-03-28 Rosemont Industries, Inc. Vibratory finishing machine having a tub with elongated troughs
DE19615065A1 (de) * 1996-04-17 1997-10-23 Walter Kasanmascheff Vorrichtung und Verfahren zum Anreichern von Flüssigkeiten
DE19639582C2 (de) * 1996-09-26 1998-10-01 Braun Ag Küchenmaschine
AU9229198A (en) * 1997-09-12 1999-03-29 Board Of Trustees Of The Leland Stanford Junior University Flow-through microcentrifuge
US6306658B1 (en) * 1998-08-13 2001-10-23 Symyx Technologies Parallel reactor with internal sensing
KR200258626Y1 (ko) * 1999-06-30 2001-12-28 윤청목 쥬스추출기와 겸용 사용되게 한 믹서
WO2002043542A2 (en) * 2000-11-29 2002-06-06 Koninklijke Philips Electronics N.V. Kitchen appliance
KR100717702B1 (ko) * 2002-11-29 2007-05-11 신토 브레이터 가부시키가이샤 배럴 연마 방법 및 배럴 연마 장치
CN102728260A (zh) * 2012-06-15 2012-10-17 东华大学 一种集成式搅拌装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1358251A (en) * 1917-05-26 1920-11-09 Fletcher Works Inc Silver-burnishing apparatus
US1605596A (en) * 1923-05-17 1926-11-02 Wilfred F Langelier Process of clarifying turbid water or other liquids
US2845936A (en) * 1955-05-09 1958-08-05 Hercules Powder Co Ltd Countercurrent contacting apparatus
US3054230A (en) * 1959-03-13 1962-09-18 Denver Equip Co Sand scrubber
FR2050199A1 (en) * 1969-06-16 1971-04-02 Griffon Henri Continuous food emulsifier
US3981693A (en) * 1973-11-12 1976-09-21 Roto-Finish Company Finishing apparatus
US4385472A (en) * 1981-02-26 1983-05-31 Roto-Finish Company, Inc. Unitary multiple centrifugal finishing apparatus
DE3320891A1 (de) * 1983-06-09 1984-12-13 Rösler Gleitschlifftechnik, Maschinenbau und technische Keramik GmbH, 8623 Staffelstein Fliehkraft-gleitschliffanlage

Also Published As

Publication number Publication date
DE3565062D1 (en) 1988-10-27
DE3427568A1 (de) 1986-02-06
ATE37313T1 (de) 1988-10-15
US4747695A (en) 1988-05-31
EP0169517A3 (en) 1986-12-03
EP0169517A2 (de) 1986-01-29
JPS61109661A (ja) 1986-05-28

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