EP0664155B1 - Agitateur - Google Patents

Agitateur Download PDF

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Publication number
EP0664155B1
EP0664155B1 EP95100723A EP95100723A EP0664155B1 EP 0664155 B1 EP0664155 B1 EP 0664155B1 EP 95100723 A EP95100723 A EP 95100723A EP 95100723 A EP95100723 A EP 95100723A EP 0664155 B1 EP0664155 B1 EP 0664155B1
Authority
EP
European Patent Office
Prior art keywords
stirring element
element according
angle
blade
range
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 - Lifetime
Application number
EP95100723A
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German (de)
English (en)
Other versions
EP0664155A1 (fr
Inventor
Hans Jürgen Dipl.-Ing. Weiss
Peter Dipl.-Ing. Forschner
Rainer Dr. Dipl.-Ing. Krebs
Reinhard Dr. Dipl.-Ing. Geisler
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.)
EKATO Ruehr und Mischtechnik GmbH
Original Assignee
EKATO Ruehr und Mischtechnik 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 EKATO Ruehr und Mischtechnik GmbH filed Critical EKATO Ruehr und Mischtechnik GmbH
Publication of EP0664155A1 publication Critical patent/EP0664155A1/fr
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Publication of EP0664155B1 publication Critical patent/EP0664155B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/113—Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller

Definitions

  • the invention relates to a stirrer for stirring in particular low and medium viscosity liquids, with one attachment on an agitator shaft and an inner main blade and one with this connected outer side sheet.
  • the main sheet of the Ruhrorgans is on the inside (at the end facing away from the side sheet) attached to an agitator shaft and the side sheet is attached outside.
  • Ruhr organs with stirring blades are known, their blade width is constant or tapers towards the tip of the leaf.
  • a mixing element is known, the impeller of each a single leaf, which one is pointed outwards has tapered leaf shape.
  • Propeller stirrers are also known Stirring blades with symmetrical, hanging or trailing Leaf shapes.
  • the disadvantage here is the high cost of materials and also difficult to manufacture.
  • the axial speeds are also distributed more or less evenly in the discharge area.
  • Other well-known agitators, according to the point of view Wing theory are made, a short circuit flow do not avoid and are therefore limited in their efficiency.
  • EP-A-0 542 713 describes a method and an apparatus for Mixing of fluids is known.
  • a mixer is used, which has a first partial flow mainly in the longitudinal extent of the container as moving Column or a so-called central flow around the container axis around and creates a second partial flow that is opposite is directed, surrounding the columnar central flow and a so-called edge flow forms.
  • the shape the mixing organs set such that their force effects on the fluid to form a columnar central flow and contribute to an annular edge flow.
  • a Shovel shape selected with the blade area facing away from the agitator shaft in axial section an angle to that of the agitator shaft facing sheet area forms, and that of the agitator shaft facing leaf area at an angle to the plane of rotation of the Agitator is employed.
  • the two leaf areas are from a uniform basic body with constant axial Width formed, for example, by appropriate folds.
  • mixing element described, which a Shovel or a blade, the tip of which in one to Container axis is mainly inclined to the parallel plane To give fluid a radial-peripheral flow direction.
  • the the mixing element facing the container bottom thus gives the fluid a preferred radially directed flow component in the mixing container.
  • the invention is based on the object Mitigation of the difficulties outlined above Stirring device to provide a high hydraulic Efficiency.
  • this is a Ruhrorgan according to the claim 1 specified.
  • the angle ⁇ 0 is preferably in the range from approximately -25 ° to approximately + 25 ° and the angle of attack ⁇ 0 is preferably in the range from approximately 15 ° to approximately 29 °.
  • the main blade is advantageously bent along a radial line or a line running at an acute angle ⁇ to it by an angle ⁇ 1 relative to the first section of the main blade, which is set at the angle of attack ⁇ 0 .
  • the bent section of the main sheet can expediently be followed by further sections, each of which is bent relative to the previous section by an angle ⁇ 2 or ⁇ 3 .
  • angles ⁇ 1 , ⁇ 2 and ⁇ 3 are preferably in the range from approximately 7 ° to approximately 19 °.
  • the main blade is at least partially curved in the tangential section, it being possible for further curved sections of different curvature to adjoin a flat section set at the angle of incidence ⁇ 0 to the plane of rotation.
  • the ratio of the radii of these bulges to the outside diameter the stirrer is preferably in the range of about 0.15 to about 0.8.
  • the side sheet in the axial section simply or repeatedly kinked or arched.
  • the bulge can have multiple sections Include different radii, the ratio of these Radii to the outside diameter of the stirrer preferably in Range is from about 0.1 to about 0.8.
  • the line connecting the main sheet and the side sheet can expediently form an angle of approximately 70 ° to approximately 95 ° form the radial centerline of the main blade, while the tangential centerline of the side sheet preferably about one Angles from 60 ° to 110 ° to the radial center line of the main blade can form.
  • the outer edge or outer contour is advantageous of the side sheet adapted to the circulating line of the stirring element or runs along this orbit.
  • FIG. 1 has, for example, a hub 12 as Attachment to a stirrer shaft, not shown, and a radial seen inner main sheet 14 and an outer side sheet 16.
  • Das Main blade 14 can be welded directly to the hub 12 or without an additional fastener, for example in the form of a spar connected to the hub 18.
  • the side leaf 16 is firmly connected to the main sheet 14, e.g. by welding, or both blades 14, 16 are formed in one piece, e.g. cast or formed from a flat piece of sheet metal.
  • the thickness of the two stirring blades 14, 16 can be of the same design or that outer sheet 16 can be made with reduced sheet thickness.
  • the two stirring blades 14, 16 have a common front edge 20, which in the illustrated embodiment is parallel to one radial line R runs through the center of the as Attachment serving hub 12 goes.
  • a connecting line 22 between the main sheet 14 and the side sheet 16 extends at an angle ⁇ 1 to this radial line R.
  • the essentially tangential center line M of the side sheet 16 forms an angle ⁇ 2 to the radial line R.
  • the angle ⁇ 1 is in the range from approximately 70 ° to approximately 95 °, while the angle ⁇ 2 is in the range from approximately 60 ° to approximately 110 °.
  • the ratio of the tangential length l n of the side blade 16 to the outer diameter d 2 of the stirring element 10 is in the range from about 0.15 to about 0.4.
  • the ratio of the diameter d 6 of the connecting line 22 between the main and side sheets 14 and 16 to the outer diameter d 2 of the stirring element 10 is in the range from about 0.25 to about 0.45.
  • the main blade 14 tapers radially from inside out, its corners pointed or can be rounded.
  • the side sheet 16 is on the front and rounded rear corner, and particularly its outer edge or outer contour 60 is on the circumferential line of the stirring element 10 adapted or follows this orbit.
  • 2a, 2b and 2c show different shapes of the main sheet 14 in a tangential section A-A of FIG. 1 or 3.
  • the main sheet 16 consists of three sections 24, 26 and 28, according to FIG. 2b, from four sections 24, 26, 28 and 30.
  • the first section 24 is set at an angle ⁇ 0 to the plane of rotation of the stirring element 10 of approximately 15 ° to approximately 29 °.
  • Section 24 is followed by at least one further section 26, possibly further sections 28, 30.
  • the section 26 is bent relative to the section 24 by an angle ⁇ 1 downward (away from the plane of rotation) along a line which runs parallel or at an acute angle ( ⁇ in FIG. 3) to the radial line R.
  • Section 26 can be followed by a further section 28, which is bent relative to section 26 by an angle ⁇ 2 downward (away from the plane of rotation) along a line which is parallel (FIG. 1) or at an acute angle ( ⁇ in Fig. 3) to the radial R.
  • section 28 is followed by a further corresponding section 30, which is bent downward at an angle ⁇ 3 relative to section 28.
  • angles ⁇ 1 , ⁇ 2 and ⁇ 3 are in the range from approximately 7 ° to approximately 19 °.
  • the main sheet 14 thus comprises several sections 24 to 30, the increasingly stronger relative to the rotating plane of the agitator (Fig. 1) or are kinked at an acute angle ( ⁇ in FIG. 3), the kink lines being parallel to the radial line R.
  • the main sheet 14 can Section A-A but also be arched with a uniform curvature or with curved sections with different radii or for example in the form of Combinations of curved and kinked sections.
  • FIG. 2c shows an embodiment in which the first section 24 is flat and, as in FIGS. 2a and 2b, is set at the angle of rotation ⁇ 0 with respect to the plane of rotation of the stirring element 10.
  • section 24 is adjoined by sections 32, 34, 36 which are curved one after the other with radii R1, R2 and R3, the individual sections tangentially into one another or with an angle ⁇ 1 in the range of approximately 7 ° pass to about 19 ° (Fig. 2a and 2b).
  • the variants of the main sheet shown in FIGS. 2a to 2c can also in the embodiment variants according to FIGS. 3 to 6 be provided.
  • the ratio of the radii R1, R2 and R3 to the outer diameter d 2 of the stirring element 10 is in the range from about 0.15 to about 0.8.
  • FIG. 3 and 3a show an embodiment in which the lines 38, along which the main sheet 14 is kinked or arched, run at an acute angle ⁇ to the radial line R.
  • the Lines 38 advantageously run parallel to each other and the innermost line 38, which is closest to radial line R, preferably starts from the corner point 62 at which the trailing edge of the main sheet 14 and the side sheet 16 bump into each other.
  • the angle ⁇ can range, for example, from about 5 ° to about 30 °, preferably from about 10 ° to about 23 °.
  • Fig. 3a shows a section of an arched leaf shape through the Main sheet 14 along line A-A of FIG. 3.
  • the main blade 14 can consist of a flat section 24, which is set at an angle ⁇ 0 to the plane of rotation of the stirring element 10.
  • the section 24 can then, for example, be followed by further flat sections 26, 28, 30 at the angles ⁇ 1 , ⁇ 2 and ⁇ 3 or further curved sections with the radii R1, R2, R3 in accordance with the embodiment according to FIG. 2c.
  • 4a, 4b and 4c show an axial section along the Line B-B of FIG. 3 or FIG. 1
  • the side sheet 16 is preferably bent upwards at an angle ⁇ 0 to the main sheet 14 (based on the stirred tank, not shown).
  • the side sheet 16 can, however, also be bent downwards by the angle ⁇ 0 in the direction of the bottom of the stirred tank relative to the main sheet 14, as shown at 52.
  • the angle ⁇ 0 is preferably in the range from approximately -25 ° to + 25 °.
  • the side sheet 16 comprises three sections 40, 42 and 44 (with other sections can be provided).
  • Sections 40, 42 and 44 are flat in themselves and the inner section 40 forms with the main blade 14 the angle ⁇ 0 already mentioned.
  • Section 40 is adjoined by section 42, which is bent relative to section 40 by an angle ⁇ 1 .
  • the section 44 adjoining the section 42 to the outside is bent relative to the section 42 by an angle ⁇ 2 .
  • the fold lines between the sections 40 and 42 and between the sections 42 and 44 preferably run parallel to the center line M of the side sheet 16, which in turn, as already stated, includes the angle ⁇ 2 with the radial line R (FIG. 1).
  • the widths of the individual sections 40, 42 and 44 as well as the widths of the sections 24, 26, 28 and 30 can be designed differently.
  • the kink angles ⁇ 1 , ⁇ 2 etc. between the individual sections 40, 42 and 44 are in the range from 0 to approximately 15 °.
  • the sections 40, 42 and 44 are increasingly bent upwards, based on the stirred tank, not shown. However, as shown at 54, they can also be bent downwards towards the bottom of the stirred tank.
  • FIG. 4c shows an embodiment in which the side sheet 16 is arched in axial section.
  • the curvature can be even, but here is preferably the side sheet 16 of several sections with different curvature, i.e. different radii, with the main blade 14 connects first curved section 46 with a radius R1 which is followed by a second curved section 48 with the radius R2, and this in turn is followed by a third section 50 with the Radius R3. (Other sections may vary connect.)
  • the ratio of the radii R1, R2 and R3 to the outer diameter d 2 of the stirring element 10 is preferably in the range from about 0.1 to about 0.8.
  • embodiments can also be provided for combinations of kinked and arched sections available.
  • the variants shown in Figures 4a to 4c of the side sheet 16 can also in the embodiments shown further including Fig. 1 and in connection with 2a to 2c are provided.
  • Fig. 5 shows a variant of the stirring element according to Fig. 1, in which a slot 58 between the main sheet 14 and the side sheet 16 trained, i.e. the two stirring blades are only one Part of the tangential width of the main sheet 14 with each other connected.
  • Fig. 6 also shows a variant of the stirring element 10, at which the main blade 14 only on the spar 18 (but not directly on the hub 12) and the edges of the main blade 14 rounded and the transition between the main sheet 14 and the side sheet 16 is rounded.
  • a broken line is alternatively a square one in FIG. 6 Design variant of an outer contour of a stirrer with Main sheet and side sheet shown as an example. Same or Similar variants can also be used for the others Embodiments of the stirring elements shown as well as combinations partially rounded and partially angular.
  • the stirrer according to the invention can have multiple blades, in particular be double-winged.
  • the ratio of the outside diameter of the agitator to the inside diameter of the agitator at about 0.2 to about 0.7. Funding is preferably given in axial direction, with the agitator according to the invention Short-circuit currents are largely suppressed, which is the pressure side results in a broadened axial profile, and by a expresses significantly increased efficiency.
  • the agitator will preferred for low-viscosity and medium-viscosity single or multi-phase liquids used in round or rectangular Containers that have a diameter of about 0.5 m to about 20 m and more can have. If necessary, can also on a stirrer shaft several stirring elements can be arranged one above the other.
  • the rotary movement of the stirrer according to the invention can in the agitated liquid is a highly concentrated axial jet are preferably generated in the direction of the container bottom, which means that the contents of the container are thoroughly mixed is guaranteed.
  • the stirring element according to the invention can be made of any metallic Materials or plastic exist. It can be surface treated be, e.g. sandblasted, polished, clothed, coated, rubberized or enamelled. It can be with or without baffles can be used in the stirred tank and it can be centric, eccentric or be installed at an angle in the stirred tank.
  • the invention provides a stirring element for stirring e.g. low-viscosity and medium-viscosity liquids.
  • the Stirrer comprises an inner main blade and an outer side blade, which are both connected.
  • the main sheet is preferably bent down with respect to the agitator plane or arched while the side sheet preferably in relation to the level of the agitator is kinked or curved.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)

Claims (19)

  1. Agitateur destiné à agiter, en particulier, des fluides de viscosité faible ou moyenne, comportant une fixation sur un arbre d'agitation (12), ainsi qu'une feuille principale interne (14) et une feuille latérale externe (16) qui lui est reliée, l'agitateur présentant, en outre, les caractéristiques suivantes:
    (a) en coupe axiale, la feuille latérale (16) fait un angle (δ0) avec la feuille principale (14),
    (b) la feuille principale (14) est ajustée pour faire un angle (δ0) avec le plan de rotation de l'agitateur (10),
    (c) pour le mouvement axial préférentiel, la longueur tangentielle (ln) de la feuille latérale (16) est supérieure à la largeur de la feuille principale (14) à la transition des feuilles principale et latérale,
    (d) le rapport de la longueur tangentielle (ln) de la feuille latérale (16) au diamètre externe (d2) de l'agitateur (10) est dans une plage qui va de 0,15 environ à 0,4 environ, et
    (e) la feuille principale (14) et la feuille latérale (14) ont ensemble un bord avant commun (20).
  2. Agitateur suivant la revendication 1, caractérisé en ce que l'angle de réglage (γ0) est dans une plage qui va de 15° environ à 29° environ.
  3. Agitateur suivant la revendication 1 ou 2, caractérisé en ce que l'angle (δ0) est dans une plage qui va de -25° environ à +25° environ.
  4. Agitateur suivant une des revendications 1 à 3, caractérisé en ce que la feuille principale (14) est, le long d'une ligne (38) qui est parallèle ou qui fait un angle aigu (ε) avec une ligne radiale (R) de la feuille principale (14), décalée d'un angle (γ1) par rapport à une première' partie (24) de la feuille principale (14) qui fait l'angle de réglage (γ0) avec le plan de rotation de l'agitateur.
  5. Agitateur suivant la revendication 4, caractérisé en ce qu'à la partie décalée (26) de la feuille principale (14), sont reliées d'autres parties (28, 30) qui sont respectivement, par rapport à la partie précédente, décalées d'angles (γ2 ou γ3) le long de lignes de pli (38), parallèles et écartées l'une de l'autre.
  6. Agitateur suivant la revendication 4 ou 5, caractérisé en ce que les angles (γ1, γ2 et γ3) sont dans une plage qui va de 7° environ à 19° environ.
  7. Agitateur suivant l'une des revendications 1 à 6, caractérisé en ce que la feuille principale (14) est, en coupe tangentielle, fabriquée au moins partiellement pliée.
  8. Agitateur suivant l'une des revendications précédentes, caractérisé en ce qu'à une partie (24) plane réglée à l'angle de réglage (γ0) avec le plan de rotation, sont reliées au moins une et, de préférence, plusieurs sections pliées (32, 34, 36) avec les rayons (R1, R2 et R3).
  9. Agitateur suivant la revendication 8, caractérisé en ce que le rapport des rayons (R1, R2 et R3) au diamètre externe (d2) est dans une plage qui va de 0,15 environ à 0,8 environ.
  10. Agitateur suivant la revendication 1, caractérisé en ce qu'à une première partie (40) de la feuille latérale (16) qui fait l'angle (δ0) avec la feuille principale (14), sont reliées au moins une et, de préférence, plusieurs autres parties (42, 44) qui, par rapport à la partie précédente, sont pliées d'un angle (δ1 ou δ2) le long de lignes parallèles espacées dans le sens radial, ces lignes étant, de préférence, parallèles à la ligne du milieu (M) de la feuille latérale (16) qui fait un angle (β2) avec la ligne radiale (R) de la feuille principale (14).
  11. Agitateur suivant la revendication 10, caractérisé en ce que les angles ( 1 et 2) sont dans une plage qui va de 0 environ à 15° environ.
  12. Agitateur suivant la revendication 10 ou 11, caractérisé en ce que l'angle (β2) est dans une plage qui va de 60° environ à 110° environ.
  13. Agitateur suivant l'une des revendications précédentes, caractérisé en ce que la feuille latérale (16) est, en coupe axiale, fabriquée au moins partiellement pliée.
  14. Agitateur suivant la revendication 13, caractérisé en ce que la feuille latérale (16) est formée de plusieurs parties (46, 48, 50) de pliures différentes avec des rayons (R1, R2 et R3).
  15. Agitateur suivant la revendication 14, caractérisé en ce que le rapport des rayons (R1, R2 et R3) au diamètre externe (d2) de l'agitateur est dans une plage qui va de 0,1 environ à 0,8 environ.
  16. Agitateur suivant l'une des revendications précédentes, caractérisé en ce que la ligne de liaison (22) entre la feuille principale (14) et la feuille latérale (16) fait, par rapport à la ligne radiale (R), un angle (β1) qui est dans une plage qui va de 70° environ à 95° environ.
  17. Agitateur suivant l'une des revendications précédentes, caractérisé en ce que le bord externe (60) de la feuille latérale (16) est adapté à la ligne de circulation de l'agitateur (10).
  18. Agitateur suivant l'une des revendications précédentes, caractérisé en ce que le rapport du diamètre (d6) de la feuille principale (14) au diamètre externe (d2) de l'agitateur (10) est dans une plage qui va de 0,25 environ à 0,45 environ.
  19. Agitateur suivant l'une des revendications précédentes, caractérisé en ce que le rapport du diamètre externe (d2) de l'agitateur (10) au diamètre interne du récipient d'agitation est dans une plage qui va de 0,02 environ à 0,7 environ.
EP95100723A 1994-01-20 1995-01-19 Agitateur Expired - Lifetime EP0664155B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4401596 1994-01-20
DE4401596A DE4401596A1 (de) 1994-01-20 1994-01-20 Rührorgan

Publications (2)

Publication Number Publication Date
EP0664155A1 EP0664155A1 (fr) 1995-07-26
EP0664155B1 true EP0664155B1 (fr) 1998-06-10

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EP95100723A Expired - Lifetime EP0664155B1 (fr) 1994-01-20 1995-01-19 Agitateur

Country Status (6)

Country Link
US (1) US5595475A (fr)
EP (1) EP0664155B1 (fr)
JP (1) JPH07308559A (fr)
DE (2) DE4401596A1 (fr)
NO (1) NO950198L (fr)
RU (1) RU95100778A (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19709818B4 (de) * 1997-03-10 2007-09-27 Wilo Ag Tauchrührwerk
DE19720120C2 (de) * 1997-05-14 2001-03-01 Hoesch & Soehne Eberhard Rührorgan
US6334705B1 (en) 1998-10-01 2002-01-01 General Signal Corporation Fluid mixing impellers with shear generating venturi
US6634784B2 (en) * 2001-08-17 2003-10-21 Spx Corporation Mixing impeller device and method
DE10321350B4 (de) * 2003-05-13 2005-04-21 Lurgi Ag Mischvorrichtung
US20050281676A1 (en) * 2004-06-16 2005-12-22 Egolf Thomas A Multi-hedral rotary wing
US7246998B2 (en) * 2004-11-18 2007-07-24 Sikorsky Aircraft Corporation Mission replaceable rotor blade tip section
DE202006007423U1 (de) * 2006-05-09 2007-09-13 EKATO Rühr- und Mischtechnik GmbH Rührorgan
BRPI0808066B1 (pt) * 2007-02-19 2018-10-09 Invent Umwelt & Verfahrenstech agitador horizontal para a produção de um fluxo em um tanque de depuração e dispositivo compreendendo agitador horizontal
FI123826B (en) * 2012-02-20 2013-11-15 Outotec Oyj Axial flow propeller blade and axial flow propeller
US9248420B2 (en) 2013-12-16 2016-02-02 Pall Corporation High turndown impeller
ES2860465T3 (es) * 2014-04-04 2021-10-05 Milton Roy Europe Móvil de agitación
DE102014110542A1 (de) * 2014-07-25 2016-01-28 EKATO Rühr- und Mischtechnik GmbH Rührorganvorrichtung
BR112017002273B1 (pt) 2014-08-13 2022-05-03 Versalis S.P.A. Rotor, dispositivo de agitação, método para preparar lâmina de rotor formada ou lâmina de estator formada de aerofólio e método para preparar o aerofólio formado da lâmina de rotor ou lâmina de estator
DE102015121513A1 (de) * 2015-12-10 2017-06-14 EKATO Rühr- und Mischtechnik GmbH Rührvorrichtung
DE102016115046A1 (de) * 2016-08-12 2018-02-15 EKATO Rühr- und Mischtechnik GmbH Rührvorrichtung und Verfahren

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2193686A (en) * 1938-10-24 1940-03-12 Frederick L Craddock Mixing apparatus
DE1503704C3 (de) * 1966-12-30 1972-03-23 Arthur Pfeiffer Hochvakuumtechnik Gmbh, 6330 Wetzlar Schaufelkranz fuer ein lauf und oder leitrad einer turbomolekularpumpe
FR1600744A (fr) * 1968-12-11 1970-07-27
US4142837A (en) * 1977-11-11 1979-03-06 United Technologies Corporation Helicopter blade
AT386321B (de) * 1986-01-16 1988-08-10 Philips Nv Mischwerkzeug fuer eine speiseeismaschine
GB9022281D0 (en) * 1990-10-13 1991-02-20 Westland Helicopters Helicopter rotor blades
GB9023141D0 (en) * 1990-10-24 1991-07-10 Westland Helicopters Helicopter rotor blades
GB9112835D0 (en) * 1991-06-14 1992-05-27 Westland Helicopters Helicopter rotor blades
FI96184C (fi) * 1991-11-12 1996-05-27 Ahlstroem Oy Menetelmä ja laite fluidien sekoittamiseksi
FR2692809B1 (fr) * 1992-06-30 1994-11-25 Guerin Sa Pierre Agitateur rotatif à hélice.
US5320494A (en) * 1992-12-22 1994-06-14 United Technologies Corporation Helicopter rotor blade having a replaceable anhedral tip

Also Published As

Publication number Publication date
NO950198D0 (no) 1995-01-19
DE4401596A1 (de) 1995-07-27
US5595475A (en) 1997-01-21
NO950198L (no) 1995-07-21
JPH07308559A (ja) 1995-11-28
RU95100778A (ru) 1996-10-27
EP0664155A1 (fr) 1995-07-26
DE59502445D1 (de) 1998-07-16

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