EP0988887A1 - Homogenisator mit Schutzvorrichtung auf dem Rotor - Google Patents
Homogenisator mit Schutzvorrichtung auf dem Rotor Download PDFInfo
- Publication number
- EP0988887A1 EP0988887A1 EP98116036A EP98116036A EP0988887A1 EP 0988887 A1 EP0988887 A1 EP 0988887A1 EP 98116036 A EP98116036 A EP 98116036A EP 98116036 A EP98116036 A EP 98116036A EP 0988887 A1 EP0988887 A1 EP 0988887A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- openings
- toothing
- homogenizer
- rotor
- stator
- 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
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
- B01F27/271—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator
Definitions
- the invention relates to a homogenizer for homogenizing flowable materials, with a rotor and a stator, the have teeth which are concentric with one another.
- Homogenizers are among others in pharmaceutical, cosmetic, chemical and food industries for manufacturing of creams, ointments, pastes, mayonnaises and similar products used. They are usually at the bottom of a mixing container arranged in which the substances are mixed and homogenized become.
- the homogenizer is often used as a rotor-stator dispersing machine trained, but can also be a so-called Circulating agitator to achieve a better pumping effect his.
- a generic homogenizer is, for example, out DE 195 37 303 A1 known.
- Homogenizers usually work at high speeds. If hard foreign bodies in the mixture to be processed, in particular Metal parts are included, these can be from the homogenizer be sucked in and damage or destroy it. This is particularly problematic when in the Product to be manufactured powder, pigments or other solids should be mixed in, as these are often metallic Foreign bodies included. It is also possible that in the mixing plant loosen screws, nuts and the like and fall into the homogenizer.
- the present invention has for its object a To create a homogenizer of the type mentioned that one Protection against damage or destruction by hard Has foreign bodies, this protection the homogenizer performance does not reduce or at least insignificantly.
- the invention solves this problem in that the rotor is radial a protective toothing on the inside of the first stator toothing with openings one to be kept to the minimum size Foreign objects adapted clear width.
- the homogenizer has one rotor and one Stator on which rotates relative to each other can be moved.
- the stator is preferably stationary and the rotor is rotatable, but this is within the scope of the invention not mandatory. Possibly. the stator (e.g. counter to the rotor). The only thing that matters is that rotor and stator rotate relative to each other can to the homogenization and described in more detail below To achieve dispersing effect.
- the rotor and stator have teeth that are concentric with one another on.
- toothing denotes any openings in a circumferential wall of the rotor or Stator through which the mix in the homogenizer operation in the radial direction penetrates to the outside.
- Such an interlocking can create individual openings in an otherwise closed, in have circumferential wall, but often the toothing formed by a on a peripheral portion a plurality of rotor or stator arranged by itself axially extending teeth, the baffles for the homogenized material exhibit. So far in the claims and the description the terms “axial” or "radial” are used, the axial direction is always through the axis of rotation of the rotor Are defined.
- the technical effect of the concentric gears is the following: that in the usually axial inlet of the homogenizer flowing in is mixed from the radial innermost rotor teeth detected and at a peripheral speed according to the peripheral speed of this Gearing applied. Supported by the centrifugal force (if necessary through separate pump blades in the rotor or the pumping action the gear surfaces) the material is thrown outwards and hits the with high kinetic energy then the following stator teeth. The kinetic energy of the Good is converted into a dispersing effect. Radially outside from this first stator toothing further rotor and connect stator gears if necessary.
- homogenizer can exert its dispersing effect, he needs at least one rotor and one stator toothing. As explained below, this rotor toothing can also be formed by the protective toothing.
- homogenizers each two (possibly also have several) rotor and stator teeth, which are arranged concentrically to each other.
- This protective toothing prevents that in the homogenizer Foreign bodies entering radially outward onto the first stator toothing be thrown and the homogenizer to destroy.
- the foreign bodies are removed from the protective toothing caught and remain in the rotor, they can be cleaned of the homogenizer can be removed.
- the clear width of the openings this protective toothing must not be larger than that minimal size of possible foreign bodies whose passage through the interlocking rotor / stator gears one still want to prevent.
- the largest clear width of the openings of the Protective teeth are often in the range 1 to 5 mm, preferably 2 to 4 mm. It is usually sufficient that Clear width to be dimensioned so that metallic foreign bodies from the size of a screw or nut of thread size M3 be prevented from passing through.
- the protective toothing according to the invention brings about not a reduction in performance, on the contrary an increase in performance of the homogenizer.
- the openings of the protective toothing contain wall sections running in the axial direction or Wall surfaces.
- the openings of the protective teeth be rectangular, with two opposite sides of the rectangle run in the axial direction.
- This in the axial direction running wall surfaces can with the first stator teeth include an angle that is between 0 and 90 °, preferably between 0 and 60 °, more preferably between 0 and is 40 °.
- An angle of 0 ° means that at a corresponding Rotary position of the rotor and stator to each other Walls of protective toothing and first stator toothing aligned, i.e. lie in one plane.
- the intermeshing rotor and stator teeth have depending on the size of the homogenizer axial height of a few centimeters or more. It is therefore preferred that the protective toothing in the axial direction seen at least two, preferably at least three has openings arranged one above the other.
- a particularly good dispersing effect is obtained and delivery rate of a homogenizer according to the invention, when facing each axial row of openings the rows adjacent in the circumferential direction of the protective toothing is arranged offset from openings in the axial direction.
- the axial displacement is preferably an amount that half the sum of the axial clear width of an opening and axial thickness of an opening separating two openings in the axial direction Corresponds to web. This means that the Separator between two axially arranged openings at the axial height of the center of an opening in Adjacent row of openings runs circumferentially (see also Fig. 3).
- the homogenizer according to the invention has one with a hub 2 provided shaft 1 by one in the drawing Drive, not shown, is driven. With wave 1 a rotor 3 rotation test is connected.
- the rotor 3 has two rotor teeth 4 and 5 concentric with each other.
- At the inner rotor toothing 4 is the one according to the invention Protective toothing.
- the homogenizer housing 6 With the homogenizer housing 6 the stator is connected, the two concentric to each other Stator teeth 7, 8 has.
- One connected to the stator Stator cover 9 covers the rotor 3 on its outer circumference from and simultaneously forms the inlet designated 10 of the homogenizer.
- the Process of the homogenizer forms. It is with a drain nozzle 12 connected.
- the homogenizer according to the invention is in an opening on the bottom one used at 13 arranged mixing container.
- annular channel 14 is provided, which the drain 11 with the Product space of the mixing container 13 connects.
- Outlet 11 of the homogenizer At low pressure in Outlet 11 of the homogenizer is the sealing ring 16 sealing and the material to be homogenized is conveyed through the nozzle 12.
- FIG. 2 It can be seen in Fig. 2 that radially inward from the first, i.e. radially innermost stator 7 the inventive Protective toothing 4 is arranged.
- This protective toothing is formed as a ring, into which (e.g. by means of a laser) Openings of the desired size are cut.
- the stator gears 7, 8 and the radially outer toothing 5 are formed by rows of axially extending ones individual teeth, as from the synopsis of FIGS. 1 and 2 can be seen.
- Fig. 3 it can be seen that adjacent axial rows of openings 19 of the protective toothing 4 are arranged offset to one another in the axial direction (cf. for example, the rows labeled 20 and 21). This offset Arrangement of the rows of openings is preferred according to the invention, but not absolutely necessary.
- Fig. 2 it can be seen that the axially extending wall surfaces 22 of the rotor teeth 5 and 23, 24 of the stator teeth 7, 8 run exactly in the radial direction, i.e. parallel to the axial plane indicated at 25.
- these wall surfaces 22, 23, 24 also relative to the radial direction be inclined to a higher pumping and / or dispersing effect to achieve.
- the wall surfaces 26 running in the axial direction are the protective toothing 4 with respect to the radial direction (or Axial plane) inclined by an angle ⁇ indicated at 27 arranged.
- the following table shows the increase in performance achieved by the protective toothing according to the invention compared to a conventional homogenizer which has no facilities for protection against foreign body entry.
- the experiments were carried out with concentrated aqueous sorbitol solution (70% by weight sorbitol, 30% by weight water).
- the table shows the factors around which the delivery rate of a homogenizer according to the invention different operating conditions compared to a conventional one Homogenizer (shown in Fig. 4) increased.
- the conventional one Homogenizer has no protective teeth on which Pump wing 18 closes the first one radially on the outside Stator teeth 7 on. You can see that on average the output increased by about a third.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Rotary Pumps (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
Description
- Fig. 1
- einen teilweisen Querschnitt durch einen erfindungsgemäßen Homogenisator;
- Fig. 2
- einen Axialschnitt durch Rotor und Stator;
- Fig. 3
- eine Ansicht des Schutzverzahnungsringes senkrecht zu dessen Axialebene;
- Fig. 4
- eine Ansicht wie Fig. 2 eines Homogenisators des Standes der Technik.
Umfangsgeschwindigkeit der Rotoraußenkante [m/s] | Leistungserhöhung gegenüber einem herkömmlichen Homogenisator bei einem Innendruck im Mischbehälter von | ||
1.000 mbar | 400 mbar | 200 mbar | |
11,15 | 1,42 | 1,36 | 1,46 |
16,72 | 1,57 | 1,74 | 1,64 |
20,07 | 1,43 | 1,48 | 1,49 |
23,42 | 1,35 | 1,42 | 1,36 |
25,39 | 1,31 | 1,39 | 1,31 |
26,76 | 1,23 | 1,48 | 1,18 |
31 | 1,24 | 1,33 | 1,02 |
Claims (7)
- Homogenisator zum Homogenisieren fließfähiger Stoffe, mit einem Rotor (3) und einem Stator, die zueinander konzentrische Verzahnungen (4,5,7,8) aufweisen, dadurch gekennzeichnet, daß der Rotor (3) radial innen von der ersten Statorverzahnung (7) eine Schutzverzahnung (4) mit Öffnungen (19) einer an die minimale Größe abzuhaltender Fremdkörper angepaßten lichten Weite aufweist.
- Homogenisator nach Anspruch 1, dadurch gekennzeichnet, daß die Öffnungen (19) der Schutzverzahnung (4) in Axialrichtung verlaufende Wandflächen (26) aufweisen.
- Homogenisator nach Anspruch 2, dadurch gekennzeichnet, daß diese Wandflächen (26) mit axial verlaufenden Wandflächen (23) der ersten Statorverzahnung einen Winkel einschließen, der zwischen 0° und 90°, vorzugsweise zwischen 0° und 60°, weiter vorzugsweise zwischen 0° und 40° liegt.
- Homogenisator nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die Öffnungen (19) der Schutzverzahnung (4) rechteckig sind.
- Homogenisator nach Anspruch 5, dadurch gekennzeichnet, daß die Schutzverzahnung (4) in Axialrichtung gesehen wenigstens zwei, vorzugsweise wenigstens drei übereinander angeordnete Öffnungen (19) aufweist.
- Homogenisator nach Anspruch 6, dadurch gekennzeichnet, daß jede axiale Reihe (20) von Öffnungen (19) gegenüber den in Umfangsrichtung der Schutzverzahnung benachbarten Reihen (21) von Öffnungen (19) in Axialrichtung versetzt angeordnet ist.
- Homogenisator nach Anspruch 7, dadurch gekennzeichnet, daß die axiale Versetzung um ein Maß erfolgt, das der Hälfte der Summe aus axialer lichter Weite einer Öffnung (19) und axialer Dicke eines zwei Öffnungen (19) in Axialrichtung trennenden Steges entspricht.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59807124T DE59807124D1 (de) | 1998-08-25 | 1998-08-25 | Homogenisator mit Schutzvorrichtung auf dem Rotor |
DE29822149U DE29822149U1 (de) | 1998-08-25 | 1998-08-25 | Homogenisator mit Schutzverzahnung |
EP98116036A EP0988887B1 (de) | 1998-08-25 | 1998-08-25 | Homogenisator mit Schutzvorrichtung auf dem Rotor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98116036A EP0988887B1 (de) | 1998-08-25 | 1998-08-25 | Homogenisator mit Schutzvorrichtung auf dem Rotor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0988887A1 true EP0988887A1 (de) | 2000-03-29 |
EP0988887B1 EP0988887B1 (de) | 2003-02-05 |
Family
ID=8232512
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98116036A Expired - Lifetime EP0988887B1 (de) | 1998-08-25 | 1998-08-25 | Homogenisator mit Schutzvorrichtung auf dem Rotor |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0988887B1 (de) |
DE (2) | DE59807124D1 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1155733A1 (de) * | 2000-05-19 | 2001-11-21 | Vakumix Rühr- und Homogenisiertechnik Aktiengesellschaft | Homogenisator zur Herstellung fliessfähiger Stoffe |
US7325966B2 (en) | 2003-05-09 | 2008-02-05 | Ika-Werke Gmbh & Co. Kg | Device for dispersion and/or homogenization |
WO2008107493A1 (en) * | 2007-10-12 | 2008-09-12 | S.P.C.M. Sa | Installation for the flocculation of sludge loaded with suspended matter, method using the installation |
EP2529829A1 (de) | 2011-06-01 | 2012-12-05 | Vakumix Rühr- und Homogenisiertechnik Aktiengesellschaft | Dispergierrotor zum Homogenisieren fließfähiger Medien |
JPWO2013027650A1 (ja) * | 2011-08-19 | 2015-03-19 | 株式会社明治 | 微粒化装置 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20002920U1 (de) | 2000-02-18 | 2000-04-20 | Schröder & Boos Misch- und Anlagentechnik GmbH & Co. KG, 27578 Bremerhaven | Homogenisator |
DE102014116242A1 (de) * | 2014-11-07 | 2016-05-12 | Uts Biogastechnik Gmbh | Rühreinrichtung für einen Fermenter einer Biogasanlage |
WO2024100447A2 (de) * | 2022-11-07 | 2024-05-16 | Frymakoruma Ag | Homogenisator sowie vakuumprozessanlage und verfahren damit |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB638966A (en) * | 1948-07-21 | 1950-06-21 | Raolo Benvenuto Giusti | Improvements in or relating to mixing and homogenising apparatus |
DE821200C (de) * | 1948-10-02 | 1951-11-15 | Hans Kotthoff | Ruehrvorrichtung |
DE1034149B (de) * | 1955-05-07 | 1958-07-17 | Hans Kotthoff | Kreiselmischer mit einem fest angeordneten, das Schleuderrad konzentrisch umgebendenWiderstands-Elementenkranz |
DE1040513B (de) * | 1953-09-07 | 1958-10-09 | Wilhelm Schmitz | Misch- und Emulgiervorrichtung fuer Fluessigkeiten |
US3285331A (en) * | 1964-05-21 | 1966-11-15 | Bratland Arthur | Combined mixing and homogenising apparatus |
DE2335773A1 (de) * | 1972-07-13 | 1974-01-31 | Silverson Machines Ltd | Mischvorrichtung |
EP0290033A1 (de) * | 1987-05-08 | 1988-11-09 | A. BERENTS GMBH & CO. KG | Homogenisator für die Herstellung fliessfähiger Produkte |
EP0760254A1 (de) * | 1995-08-29 | 1997-03-05 | Vakumix Rühr- und Homogenisiertechnik Aktiengesellschaft | Vorrichtung zum Homogenisieren fliessfähiger Stoffe |
-
1998
- 1998-08-25 EP EP98116036A patent/EP0988887B1/de not_active Expired - Lifetime
- 1998-08-25 DE DE59807124T patent/DE59807124D1/de not_active Expired - Lifetime
- 1998-08-25 DE DE29822149U patent/DE29822149U1/de not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB638966A (en) * | 1948-07-21 | 1950-06-21 | Raolo Benvenuto Giusti | Improvements in or relating to mixing and homogenising apparatus |
DE821200C (de) * | 1948-10-02 | 1951-11-15 | Hans Kotthoff | Ruehrvorrichtung |
DE1040513B (de) * | 1953-09-07 | 1958-10-09 | Wilhelm Schmitz | Misch- und Emulgiervorrichtung fuer Fluessigkeiten |
DE1034149B (de) * | 1955-05-07 | 1958-07-17 | Hans Kotthoff | Kreiselmischer mit einem fest angeordneten, das Schleuderrad konzentrisch umgebendenWiderstands-Elementenkranz |
US3285331A (en) * | 1964-05-21 | 1966-11-15 | Bratland Arthur | Combined mixing and homogenising apparatus |
DE2335773A1 (de) * | 1972-07-13 | 1974-01-31 | Silverson Machines Ltd | Mischvorrichtung |
EP0290033A1 (de) * | 1987-05-08 | 1988-11-09 | A. BERENTS GMBH & CO. KG | Homogenisator für die Herstellung fliessfähiger Produkte |
EP0760254A1 (de) * | 1995-08-29 | 1997-03-05 | Vakumix Rühr- und Homogenisiertechnik Aktiengesellschaft | Vorrichtung zum Homogenisieren fliessfähiger Stoffe |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1155733A1 (de) * | 2000-05-19 | 2001-11-21 | Vakumix Rühr- und Homogenisiertechnik Aktiengesellschaft | Homogenisator zur Herstellung fliessfähiger Stoffe |
US7325966B2 (en) | 2003-05-09 | 2008-02-05 | Ika-Werke Gmbh & Co. Kg | Device for dispersion and/or homogenization |
WO2008107493A1 (en) * | 2007-10-12 | 2008-09-12 | S.P.C.M. Sa | Installation for the flocculation of sludge loaded with suspended matter, method using the installation |
FR2922123A1 (fr) * | 2007-10-12 | 2009-04-17 | S P C M Sa Sa | Installation pour la floculation de boues chargees de matieres en suspension, procede mettant en oeuvre l'installation |
US8057684B2 (en) | 2007-10-12 | 2011-11-15 | S.P.C.M. Sa | Installation for the flocculation of sludge loaded with suspended matter, method using the installation |
EP2529829A1 (de) | 2011-06-01 | 2012-12-05 | Vakumix Rühr- und Homogenisiertechnik Aktiengesellschaft | Dispergierrotor zum Homogenisieren fließfähiger Medien |
US9452396B2 (en) | 2011-06-01 | 2016-09-27 | Netzsch Vakumix Gmbh | Rotor for homogenizing flowable media |
JPWO2013027650A1 (ja) * | 2011-08-19 | 2015-03-19 | 株式会社明治 | 微粒化装置 |
EP2745920A4 (de) * | 2011-08-19 | 2015-07-29 | Meiji Co Ltd | Zerstäubungsvorrichtung |
JP2018065128A (ja) * | 2011-08-19 | 2018-04-26 | 株式会社明治 | 微粒化装置 |
Also Published As
Publication number | Publication date |
---|---|
DE59807124D1 (de) | 2003-03-13 |
DE29822149U1 (de) | 1999-04-08 |
EP0988887B1 (de) | 2003-02-05 |
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