EP0305576B1 - Agitateur pour une machine à mélanger industrielle - Google Patents

Agitateur pour une machine à mélanger industrielle Download PDF

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Publication number
EP0305576B1
EP0305576B1 EP87112895A EP87112895A EP0305576B1 EP 0305576 B1 EP0305576 B1 EP 0305576B1 EP 87112895 A EP87112895 A EP 87112895A EP 87112895 A EP87112895 A EP 87112895A EP 0305576 B1 EP0305576 B1 EP 0305576B1
Authority
EP
European Patent Office
Prior art keywords
stirring
stirring wing
tool according
parts
impeller
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
EP87112895A
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German (de)
English (en)
Other versions
EP0305576A1 (fr
Inventor
Dieter Kupka
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.)
Baukooperation GmbH
Original Assignee
Baukooperation 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 Baukooperation GmbH filed Critical Baukooperation GmbH
Priority to EP87112895A priority Critical patent/EP0305576B1/fr
Priority to AT87112895T priority patent/ATE71560T1/de
Priority to DE8787112895T priority patent/DE3776145D1/de
Publication of EP0305576A1 publication Critical patent/EP0305576A1/fr
Application granted granted Critical
Publication of EP0305576B1 publication Critical patent/EP0305576B1/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
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades

Definitions

  • the invention relates to a stirring tool for an industrial mixing or stirring machine, comprising a shaft which can be rotated by a motor and at least two stirring blades attached thereto, each stirring blade consisting of at least two parts.
  • a stirring tool is known (EP-A-0 140 024).
  • Stirring tools of this type are used for mixing and stirring in pourable, in particular liquid and pasty media, as well as for emulsifying and dispersing.
  • Stirring tools for laminar stirring and mixing systems include frame stirrers, anchor, grid and finger stirrers.
  • Stirring tools for turbulent stirring and mixing systems include propeller, turbine, disc, basket (or cyclone), bar and / or cross bar stirrers.
  • the type of mixing tool used depends on the objective of the mixing or mixing process. For example, a gentle or intensive mixing, which is gentle on the product, or rapid heat transfer or sedimentation-preventing stirring action and the aforementioned dispersion or the homogenization of solid or liquid additives in a carrier fluid may be required.
  • the invention has for its object to provide a stirring tool of the type mentioned that can be quickly and easily adapted to a variety of different uses and conditions.
  • the invention provides a stirring tool that can be easily adapted to the requirements by adjusting its impeller parts or by exchanging them with other impeller parts. It is thus possible to achieve a wide range of adaptation to the respective task with one and the same stirring blades, so that the necessary storage of stirring tools can be reduced accordingly.
  • the invention makes use of the knowledge that the displacement capacity and thus the process-related effect of each stirring element is due to the stirring tool surface projecting into the stirring product is determined. When using a planar stirring tool, it is thus possible to change this projected stirring blade surface by changing the angle of attack. This results not only in a change in the power consumption on the stirring tool shaft, but also in a change in the flow effects caused by the rotation of the stirring tool in the material to be stirred.
  • This adjustment of the agitator blades can be done in a much shorter time than a complete exchange of agitators. It is thus possible to adapt the shape of the stirring tool to the respective needs to a much finer extent than can be achieved by exchanging stirring tools if a reasonable effort is adhered to.
  • impeller parts are designed so that the blade width decreases in the radial direction from the inside to the outside, so that on the one hand such a blade can be optimally dimensioned from the point of view of strength, and on the other hand the different linear circulation speeds depending on the radius are taken into account.
  • the lower orbital velocity in the vicinity of the orbital axis requires a larger effective projected area in order to achieve the same flow effect in the material to be stirred than a larger orbiting radius.
  • the stirring tool therefore offers a larger area near the axis of rotation than far from the axis of rotation.
  • variable angle adjustment of the impeller parts makes it easy to change the power consumption and displacement efficiency in fluid media.
  • each agitator blade also allows the flow conditions in the radially outer area to be set independently of those in the radially inner area, since according to the invention the individual parts of an agitator blade can be rotated independently of one another and can be fixed in the selected positions.
  • the impellers are essentially flat structures with essentially flat surfaces, but the invention also provides special impeller parts which are provided, for example, with a Venturi nozzle or with ribs running obliquely parallel to one another.
  • Intensive radial flow components and shear forces in the agitated material can be achieved by means of inclined ribs, which are attached to the wings, these ribs running obliquely to a circumferential radius, with the flow radially outwards, radially inwards, angled upwards or downwards depending on the angular position can be performed, again depending on the inclination of the agitator blade part carrying these ribs against the circumferential plane.
  • agitator blades are arranged one above the other in several stages, the flow effects in a container equipped with the agitator tool can be influenced in a special way by suitable selection of the settings of the agitator blade parts.
  • Flow patterns of various types can be set therein, in particular also countercurrents, which lead to particularly intensive mixing.
  • a radially inwardly directed flow component can be imparted to the material to be stirred in one stage, while a radially outwardly directed flow component is generated in the adjacent stage.
  • flow components can also be generated parallel to the axis of the shaft of the stirring tool, which run opposite to the axis near the axis near the axis.
  • the invention enables the mixing tool to be optimally adapted to a given motor power or rated speed of the drive motor, i.e. adjust the stirrer if necessary, taking into account a possibly not reached optimum of the stirring action, so that just the nominal power or the nominal speed of the drive motor for the stirrer is achieved.
  • the invention makes it possible, if necessary, to approach this position of the agitator blade parts of the agitating tool, which can achieve such conditions on the drive shaft, by experiment.
  • Fig. 1 shows a partial representation of an agitator tool and can thereby fully recognize the inventive design of an impeller.
  • only one impeller 100 is shown attached to a drive shaft 0 in a rotationally fixed manner, while a second impeller, which is rotationally symmetrical to the first impeller 100 and is at the same axial height, is only indicated.
  • the impeller 100 consists in the present case of three parts 10, 20 and 30, which in seen in the radial direction are arranged one behind the other.
  • the first, radially inner impeller part 10 is connected in a rotationally fixed manner to the drive shaft 0 by means of a bush 40.
  • the second, middle impeller part 20 is attached to the radially outer end of the first impeller part 10.
  • the third, radially outer impeller part 30 is attached to the radially outer end of the second impeller part 20.
  • the three agitator blade parts 10, 20, 30 are designed as flat, blade-like plates which extend essentially in the radial direction. All connections of the impeller parts with the socket 40 or with one another are designed such that the impeller parts are freely rotatable, each with a radius to the drive shaft 0 as the axis of rotation, and can be fixed in their rotational positions. Details of this will be discussed later.
  • Fig. 1 it can be seen from an upper edge visible on the impeller part 10 and a lower edge visible on the impeller parts 20 that these impeller parts are inclined in opposite directions to a plane in which the impeller 100 rotates, while the outer impeller part 30 transversely to the direction of the Orbital movement around the axis of the drive shaft 0.
  • a sleeve 11 which extends radially with respect to the circumferential axis of the drive shaft 0, is welded to the radially inner end of the first impeller part 10, which is inserted into a corresponding recess formed longitudinally in the impeller part 10 and welded at the edges thereof is.
  • the impeller part 10 is provided with an approximately circular opening 12. The inner end of the sleeve 11 protrudes into this opening 12.
  • the first agitator blade part 10 is provided with two bores 13 one behind the other in the radial direction with respect to the axis of the drive shaft 0, which serve to fasten a connecting element 50.
  • the bush 40 is mounted on the drive shaft 0 in a rotationally fixed manner by means of a wedge 41.
  • Other anti-rotation devices such as slot wedge connections, clamping screws screwed through the bushing 40 and the like, can also be used.
  • the bushing 40 carries a plurality of radially extending connecting pins 42 which are evenly distributed in the circumferential direction, one of which is shown in FIG. 2.
  • the connecting pin 42 has a collar 43 which is integrally connected to it and by means of which the connecting pin 42 is fastened to the socket 40 by welding.
  • the sleeve 11 of the first impeller part 10 is pushed onto the pin 42. Your free, i.e. end pointing away from the impeller part 10 is supported on the collar 43.
  • the pin 42 carries at its free end a threaded portion 44 onto which a nut 45 is screwed, with the aid of which the impeller part 10 is thus fastened to the bush 40.
  • the nut 45 is accessible for a suitable tool due to the opening 12 in the impeller part 10.
  • the width of the impeller part 10 decreases from the inside to the outside. This takes into account the various speeds at which the impeller part 10 strikes the material to be treated.
  • FIG. 3 shows the middle impeller part 20 from FIG. 1 in a side view. This is designed essentially in the same way as the first impeller part 10, but its dimensions may be smaller, as shown in FIG. 1.
  • the details of the second impeller part 20, which correspond to those of the impeller part 10 of FIG. 1, are provided with reference numerals increased by 10 and need not be explained again.
  • FIG. 3 also shows the connecting element 50, with which the first and second impeller parts 10 and 20 are connected to one another.
  • the connecting element 50 has a forked shaft 51 and a connecting pin 52. At the transition between the forked shaft 51 and the pin 52, the connecting element 50 carries a collar 53 formed integrally with it. At the free end of the pin 52, a threaded section 54 is formed.
  • the sleeve 21 of the second impeller part 20 is pushed onto the pin 52 and secured there in a rotationally fixed manner by means of a nut 55 screwed onto the threaded section 54.
  • the second impeller part 20 can be rotated on the pin 52 and fixed by tightening the nut 55 in any selected position.
  • the impeller part 20 has two bores 23, which are used to attach a connecting element 60 for connecting the third, outer impeller part 30.
  • FIG. 4 shows the third, outer impeller part 30 in a top view (FIG. 4a) and in a lateral section (FIG. 4b).
  • FIG. 4b also shows the type of attachment to the middle impeller part 20, which corresponds entirely to the type of attachment of the middle impeller part 20 to the first impeller part 10.
  • the third, outer impeller part 30 is relatively short in the radial direction in comparison to the other impeller parts 10 and 20, but is relatively wide for this. It carries on both sides approximately perpendicular to the surface extension of this impeller part 30, blades 34 extending parallel to one another, which begin at the radially outer edge and extend obliquely over about a third of the radial extent of the impeller part 30. These blades 34 are intended to produce a special shearing action in the material to be treated and to promote emulsification processes. The angle that the blades form with the wing axis is 30 to 60 °.
  • the third impeller part 30 is fastened to the second impeller part 20 by means of the connecting element 60 already mentioned, which is completely the same as the connecting element 50 and, like that, allows the rotary positions of the third impeller part 30 to be freely selected with respect to the second impeller part 20.
  • the details of the connector 60, those of the connector 50 correspond to reference numerals increased by 10, which therefore speak for themselves, so that a repetition of the explanation can be omitted.
  • the forked shaft 61 sandwiches the second impeller part 20 between them.
  • the shaft 61 is provided with two bores 66 which are aligned with the bores in the second impeller part 20. Screw bolts 67 are screwed through these holes.
  • FIG. 5 shows an alternative embodiment of an impeller part 70 which can be used as a radially external part and which is essentially characterized by a Venturi nozzle 74.
  • This impeller part consists of a plate 70 ′ which, in the manner of the impeller parts described above, carries a sleeve 71 for attachment to a connecting element 60 in the manner already explained, which ends in an opening 72.
  • the aforementioned Venturi nozzle 74 is welded to this plate 70 'at the end facing away from the sleeve 71.
  • the Venturi nozzle 74 consists of two trapezoidal side plates 75, one of which is welded to the plate 70 ', and two cover plates 76 connecting the two side plates 75 to one another, which converge and form a funnel-shaped inlet, as in Fig. 5 in the two Sectional views to the right of the side view is shown.
  • the direction of flow of the material into the Venturi nozzle 74 when the stirring tool rotates is indicated in the sectional views in FIG. 5 by arrows.
  • the impeller part 70 can be rotated on the connecting element 60 and fixed in any rotational position.
  • the right sectional view in FIG. 5 shows a position in which the Venturi nozzle 74 is rotated by an angle ⁇ with respect to the sectional view shown to the left thereof.
  • this Venturi nozzle When circulating in fluid media, this Venturi nozzle causes it to compress as it passes through the nozzle, depending on the speed of movement of the Venturi nozzle in the medium. Depending on the angular position, the achievable stirring intensities can be set. This affects not only the compression within the nozzle but also the flow around the nozzle.
  • the ram jet effect of the Venturi nozzle causes compression of the stirred medium and thus a high flow velocity of the same in the nozzle, in contrast to the areas of the medium to be stirred which are not covered by the Venturi nozzle, as a result of which homogenization processes can be accelerated.
  • Fig. 6 shows a side view and a top view of two rotationally symmetrical outer agitator blade parts 80, in which agitator blades 80 'approximately trapezoidal shape with Venturi nozzles 84 are integrally combined.
  • the Venturi nozzles 84 are arranged in a rotationally symmetrical manner with respect to the axis, which is only shown schematically here, so that they each have the same effects when circulating through the agitated material. It is understood that in this case, too, the impeller parts 80 can be brought into any angular positions and can be fixed in them. The facilities required for this need not be explained again.
  • Fig. 7 shows a perspective view as a detail of the end of an impeller part 80 from Fig. 6. It can be seen that in the region of the free end of the plate 80 'a breakthrough is formed in which a Venturi nozzle 84 is used, the structure of which 5 is completely the same, which is why a more detailed explanation can be dispensed with here.
  • the Venturi nozzle 84 is preferably fixed in the cutout in the plate 80 'by welding.
  • FIG. 8 shows in a rotationally symmetrical arrangement with respect to the axis of the drive shaft 0 shown only schematically, two outer impeller parts 90, which are designed as flat, to the free end narrowing plates 90 '. These plates 90 'are each provided at the radially outer end with a central incision S, which extends in the example shown over about 25% of the length of each plate 90'.
  • the flags 94 and 95 lying on both sides of this incision S are crossed in opposite directions, i.e. bent out of the plane in which the remaining portion of the plate 90 'extends.
  • FIG. 8a shows the representation from the side, while FIG. 8b shows an end view from which the different directions of entanglement of the flags 94 and 95 can be clearly seen.
  • FIG. 8b also shows that one impeller part 90 has an opposite position to the other impeller part with respect to a circumferential plane around the axis of the drive shaft 0.
  • the stirring tool is extremely versatile and can be largely adapted to the respective needs.
  • the amount of stirring tools or stirring tool parts to be kept can be considerably reduced.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)

Claims (10)

  1. Agitateur pour une machine à mélanger ou à agiter industrielle, comprenant un arbre (0), agencé de façon à pouvoir être entraîné en rotation par un moteur, et au moins deux palettes d'agitation (100) fixées sur cet arbre, chaque palette d'agitation (100) étant constituée d'au moins deux parties (10, 20, 30, 70, 80, 90), caractérisé en ce que, parmi les parties qui sont au moins au nombre de deux, la partie intérieure de palette d'agitation (10) est fixée, à l'une de ses extrémités, intérieure, sur l'arbre (0) d'une manière amovible et réglable en position et en ce que l'autre partie de palette d'agitation (20), extérieure, est fixée d'une manière amovible et réglable en position sur l'autre extrémité, extérieure, de la partie intérieure de palette d'agitation (10).
  2. Agitateur suivant la revendication 1, caractérisé en ce que chaque partie intérieure de palette d'agitation (10) est emboîtée sur un doigt (42) s'étendant suivant la direction radiale à partir d'un manchon (40) qui la porte et qui est emboîté sur l'arbre (0) et est rendu solidaire de ce dernier d'une manière fixe en rotation.
  3. Agitateur suivant la revendication 2, caractérisé en ce que chaque partie extérieure de palette d'agitation (20 ; 30 ; 70 ; 80 ; 90) est emboîtée sur un doigt (52 ; 62) qui est fixé à l'extrémité extérieure de la partie intérieure de palette d'agitation associée et qui, de là, s'étend d'une manière pratiquement radiale vers l'extérieur.
  4. Agitateur suivant l'une des revendications 2 et 3, caractérisé en ce que chaque partie de palette d'agitation comporte une douille (11 ; 21 ; 31 ; 71), destinée à recevoir le doigt (42 ; 52 ; 62), et, dans la zone extrême de cette douille, une ouverture (12 ; 22 ; 32 ; 72) et en ce que les doigts comportent, au moins à leur extrémité libre, un filetage extérieur (44 ; 54 ; 64) sur lequel est vissé un écrou (45 ; 55 ; 65) serré sur la douille associée.
  5. Agitateur suivant l'une des revendications 3 et 4, caractérisé an ce qu'à leur extrémité tournée vers la partie intérieure de palette d'agitation, les doigts portant les parties extérieures de palette d'agitation sont à deux branches (51 ; 61) et en ce que les branches prennent appui sur la partie intérieure de palette d'agitation de part et d'autre de celle-ci et y sont fixées au moyen de boulons (67).
  6. Agitateur suivant l'une des revendications précédentes, caractérisé en ce que l'une des parties de palette d'agitation (70 ; 80) porte une buse de Venturi (74 ; 84) dont l'ouverture est disposée transversalement à la direction de déplacement de la partie de palette d'agitation lors de la rotation de l'arbre (0).
  7. Agitateur suivant l'une des revendications précédentes, caractérisé en ce que l'une des parties de palette d'agitation (30) porte plusieurs ailettes (34) s'étendant parallèlement entre elles et orientées suivant un angle compris entre 30° et 60° par rapport à l'axe de la palette.
  8. Agitateur suivant l'une des revendications précédentes, caractérisé en ce que les parties de palette d'agitation (10 ; 20 ; 80 ; 90) présentent, au moins dans une zone partielle, une étendue à deux dimensions, en rétrécissant de l'intérieur vers l'extérieur suivant la direction radiale.
  9. Agitateur suivant l'une des revendications précédentes, caractérisé en ce que la partie extérieure de palette d'agitation (90) de chaque palette d'agitation (100) présente une étendue à deux dimensions et est entaillée (S), suivant la direction radiale, dans sa zone d'extrémité, et en ce que les talons (94, 95) de cette partie de palette d'agitation (90) qui sont séparés l'un de l'autre par l'entaille (S) présentent un vrillage dans des sens opposés l'un à l'autre.
  10. Agitateur suivant l'une des revendications 2 à 8, caractérisé en ce que plus de deux doigts (42) sont fixés sur le manchon (40) suivant une répartition angulaire régulière.
EP87112895A 1987-09-03 1987-09-03 Agitateur pour une machine à mélanger industrielle Expired - Lifetime EP0305576B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP87112895A EP0305576B1 (fr) 1987-09-03 1987-09-03 Agitateur pour une machine à mélanger industrielle
AT87112895T ATE71560T1 (de) 1987-09-03 1987-09-03 Ruehrwerkzeug fuer eine industrielle misch- oder ruehrmaschine.
DE8787112895T DE3776145D1 (de) 1987-09-03 1987-09-03 Ruehrwerkzeug fuer eine industrielle misch- oder ruehrmaschine.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87112895A EP0305576B1 (fr) 1987-09-03 1987-09-03 Agitateur pour une machine à mélanger industrielle

Publications (2)

Publication Number Publication Date
EP0305576A1 EP0305576A1 (fr) 1989-03-08
EP0305576B1 true EP0305576B1 (fr) 1992-01-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP87112895A Expired - Lifetime EP0305576B1 (fr) 1987-09-03 1987-09-03 Agitateur pour une machine à mélanger industrielle

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EP (1) EP0305576B1 (fr)
AT (1) ATE71560T1 (fr)
DE (1) DE3776145D1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0794008B2 (ja) * 1990-11-21 1995-10-11 鹿島建設株式会社 混練装置及び混練方法
EP0487310B1 (fr) * 1990-11-21 1997-01-29 Kajima Corporation Dispositif et procédé de mélange
JPH0741614B2 (ja) * 1990-11-21 1995-05-10 鹿島建設株式会社 混練装置及び混練方法
DE19711019A1 (de) * 1997-03-17 1998-09-24 Basf Ag Rührer mit variabel einstellbaren Rührorganen für Polymerisationsreaktoren
US6796707B2 (en) 2002-02-26 2004-09-28 Spx Corporation Dual direction mixing impeller and method
DE102008005018B3 (de) * 2008-01-17 2009-03-12 INOTEC GmbH Transport- und Fördersysteme Rührorgan und Rührwerk zum Mischen und/oder Homogenisieren strömungsfähiger Medien
CN109395627A (zh) * 2018-11-09 2019-03-01 洛阳双瑞金属复合材料有限公司 一种可调节搅拌角度的搅拌扇叶
CN114307367B (zh) * 2022-01-18 2023-06-09 郴州市金信材料科技有限公司 一种用于生产高纯度三氧化二锑的制备装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB749327A (en) * 1953-12-18 1956-05-23 Osborne Engineers Ltd Improvements in rotary agitators
AT265214B (de) * 1964-12-29 1968-10-10 Erich Karl Todtenhaupt Vorrichtung zur Herstellung gleichmäßiger Dispersionen
DE1507894A1 (de) * 1966-09-20 1969-04-10 Ludwig Hunkel Mischer fuer Schuettgut
DE2557979C2 (de) * 1975-12-22 1986-09-18 EKATO Industrieanlagen Verwaltungsgesellschaft mbH u. Co, 7860 Schopfheim Interferenzstrom-Rührvorrichtung
DE3332069A1 (de) * 1983-09-06 1985-03-21 Hoechst Ag Ruehrer fuer wandnahes ruehren

Also Published As

Publication number Publication date
EP0305576A1 (fr) 1989-03-08
ATE71560T1 (de) 1992-02-15
DE3776145D1 (de) 1992-02-27

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