EP3192582A1 - Tool for a mixing device and mixing device - Google Patents
Tool for a mixing device and mixing device Download PDFInfo
- Publication number
- EP3192582A1 EP3192582A1 EP16205611.3A EP16205611A EP3192582A1 EP 3192582 A1 EP3192582 A1 EP 3192582A1 EP 16205611 A EP16205611 A EP 16205611A EP 3192582 A1 EP3192582 A1 EP 3192582A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool
- rotation
- axis
- blade
- rotary shaft
- 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
- 238000002156 mixing Methods 0.000 title claims abstract description 41
- 239000000203 mixture Substances 0.000 claims abstract description 43
- 239000007787 solid Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 10
- 238000005496 tempering Methods 0.000 claims description 10
- 239000000654 additive Substances 0.000 description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 230000000996 additive effect Effects 0.000 description 14
- 238000004891 communication Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 239000013590 bulk material Substances 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 235000012820 baking ingredients and mixes Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000013529 heat transfer fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000013598 vector Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
- B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
- B01F23/23314—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements through a hollow stirrer element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/70—Pre-treatment of the materials to be mixed
- B01F23/702—Cooling materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/70—Pre-treatment of the materials to be mixed
- B01F23/711—Heating materials, e.g. melting
-
- 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
- B01F27/1123—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades sickle-shaped, i.e. curved in at least one direction
-
- 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
- B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
- B01F27/191—Stirrers with two or more mixing elements mounted in sequence on the same axis with similar elements
-
- 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
- B01F27/21—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
- B01F27/2122—Hollow shafts
Definitions
- the invention relates to a tool, in particular for comminuting and / or mixing of mixed material, for a mixing device with a container for receiving the mixed material, wherein the tool rotates in the container in a first rotational direction about an axis of rotation to crush the mix and / or and wherein the tool comprises a rotary shaft having at least one tool blade extending radially outward from the rotary shaft, forming a front end in the first rotational direction and a rear side in a direction opposite to the first rotational direction.
- the invention further relates to a mixing device with a corresponding tool.
- Generic tools are used in mixing devices to mix or bulk material or bulk material, for example, dry and / or moistened solids to comminute and / or.
- An essential requirement for such mixing devices is a sufficient mixing action to ensure good homogeneity of the mixture.
- the term mix can be a combination of different substances, especially solids such as baking mixes.
- a single solid such as e.g. Flour being processed by the blender.
- additives such as gases, liquids and / or solids combinations thereof are introduced into the mix. This may be e.g. to be preservative, colorant, dye, etc. or even just air.
- Mixing devices known from the prior art have a container rotatably mounted about a vertical axis for receiving the mixed material with an upper opening. Through the opening of the container is loaded with mix.
- a mixing tool for example a rotatable mixing shaft with at least one helix, protrudes from above through the opening obliquely to the vertical axis of the container into it and rotates. The tool moves through the mix and mixes the substances, so that they are processed to a homogeneous mass. At appropriate speed not only a mixing takes place, but the tool additionally comminutes the mix.
- Such devices are typically used separately and are known by the term chopper or comminution tool. In particular, the front side of the tool blades ensures a comminution of the mixed material by this hits the mix at high speed.
- a batch mixer for mixing dry or wet solids with liquid addition is described.
- a rotating around the container longitudinal axis mixing tool is mounted, which transports the mix along the container wall upwards.
- a rotatably driven by an electric motor hollow shaft is arranged, which projects into the interior of the container. From the hollow shaft extending radially outward each cutting rotors, which serve to avoid lumps in the mix.
- the in the DE 24 25 727 C3 described mixing device has in the bottom region a vortex device having a plurality of stirring members, which extend radially from the axis of rotation of the vortex device to the outside.
- the stirring members are angled at their outer end, wherein they bend upwards or downwards.
- Nozzles for introducing additives are arranged below the stirring members on an injection pipe.
- the object of the present invention is to improve the degree of efficiency of such a tool and a mixing device.
- the end face in a plane perpendicular to the axis of rotation has an outwardly curved contour and the rear side in a plane perpendicular to the axis of rotation an inwardly curved Kontor, and the tool blade has at least one nozzle for supplying additives or gases, liquids and / or Solids.
- the first direction of rotation designates the direction of rotation of the tool intended for the operation of a mixing device.
- the feeding of additives through the nozzles, in combination with the tool blades, causes additional mixing and uniform distribution of the additives.
- the plane perpendicular to the axis of rotation designates the plane on which the axis of rotation is vertical.
- the axis of rotation is in each case perpendicular to the plane spanning the plane and lying perpendicular to each other vectors.
- the corresponding viewing direction along the axis of rotation may be referred to as the plan view of the plane.
- the front side may also be referred to as a front edge of the tool blade in the rotational direction and the rear side in the direction of rotation as a rear edge of the tool blade.
- the tool blade In the direction of rotation provided for the operation of the radially outwardly extending portion of the tool blade forms the intersecting end of the mix, in particular end face.
- the end face is the material flow, which flows along the tool blade, facing and therefore can also be referred to as windward side.
- the rear or so-called rear side refers to the side that is oriented opposite to the direction of rotation. This corresponds to the lee side of the tool blade and can form a rear surface accordingly.
- the tool blade moves around the axis of rotation in a plane to which the axis of rotation of the shaft is orthogonal.
- the end face can have an arcuate cross section or an arcuate contour in a viewing direction along the axis of rotation (plan view) and thereby extend radially outwards, thereby approximating a first axis, along which the tool blade extends radially outwards, such that a outwardly convex or convex contour forms.
- the rear side extends arcuately radially outwardly and approaches the first axis. However, the rear side has an inwardly curved, concave shape or contour.
- the surface portion of the end face may be greater than the area proportion of the rear side of the total area of the front and rear sides.
- the rotary shaft and the tool blade can have at least one passage for additives to the at least one nozzle, so that additives can be passed through the rotary shaft and the tool blade from the nozzle into the mix.
- the rotary shaft may be formed as a hollow shaft or hollow lance for carrying out appropriate media or designed as a hollow shaft and receive a pipe or a pipe.
- the passage for the additives has at least one opening which is connected to the passage in the tool blade.
- the nozzles may be formed in the form of holes, openings or the like in the tool blade.
- the tool according to the invention can be used as a mixing tool to mix the mix.
- the tool can be used as a comminuting tool to comminute the mix and thus improve the mixing result.
- the invention makes it possible to advantageously integrate the functions of a mixer and a comminution tool into a tool.
- the tool can be used in addition to a mixing helix, but also as an alternative to the mixing helix.
- the tool is rotatably mounted, preferably in a lid closing the opening of the container and driven in rotation by a suitable drive, such as an electric motor.
- a suitable drive such as an electric motor.
- the tool blade or the tool blades are preferably arranged on a lower, that is to say on the end of the shaft projecting into the container.
- the tool blade may have an outer contour surrounding the blade, which extends radially outward from the shaft like a wing.
- the tool blade can also have a directed in a first direction of the axis of rotation flat underside and directed in the opposite direction flat top.
- the sides may be defined by an edge, e.g. on the front and rear side, be separated from each other, wherein the edge may extend parallel to the axis of rotation and / or perpendicular to the top or bottom of the tool blade.
- the edges can also be inclined, e.g. as cutting edges, be formed.
- the tool blade has a circumference that extends along the edge of the tool blade.
- the tool blade can end in the plan view in the radial direction or radially outward in a blunt outer portion.
- the outer portion may be configured to interconnect the rear and front sides.
- the outer section provides improved flow conditions, resulting in particularly strong and stable vortex configurations that provide additional mixing of the mix.
- the mix does not strike the front edge of the tool blade as on the front side, but the outer area of the tool blade is drawn past the mix and draws a circular track through the mix.
- the tool blade has a plurality of nozzles which are arranged such that at least a number of the nozzles have a different distance from the axis of rotation of the rotary shaft.
- a plurality of nozzles may be distributed along the circumferential edge of the tool blade such that at least a number of the nozzles have a different distance from the axis of rotation of the rotary shaft.
- the mixture hits the outer surface of the tool blade at a much higher speed on the end face, as in the vicinity of the central or rotational axis.
- the acceleration of the additives within the tool blade in the vicinity of the axis of rotation is less than on the outer circumference of the tool blade.
- the pressure at which the liquid exits the nozzle is varied.
- the centrifugal force causes the additive to be thrown outward in the tool blade, causing it to experience high acceleration and thereby leak out of the nozzles at high pressure.
- a further embodiment of the invention provides that the tool blade has a number of nozzles at least on the front side and / or on the rear side.
- the blunt outer portion also has at least one nozzle.
- the nozzles are distributed in the circumferential direction of the tool blade along the edge surrounding the tool blade.
- a further embodiment of the invention provides that the tool is perpendicular in a first direction or along a first axis extends radially outward to the axis of rotation and that with increasing distance in the first direction from the axis of rotation of the radial distance between the end face and the axis of rotation is greater than the radial distance between the rear side and the axis of rotation.
- a reference point on the axis in the first direction can be selected, on which the respective point of the front side or the rear side is projected vertically in plan view.
- the tool has two in the plane perpendicular to the axis of rotation opposite tool blades. These are then preferably combined in a tool element or form a tool element. It has been found to be particularly advantageous if the two tool blades are at least partially integrally connected to each other.
- the tool element may comprise at least one component which forms a portion of the first tool blade and a portion of the second tool blade.
- the tool element may include a planar top member and a planar bottom member, wherein the top member and the bottom member each form a portion of the first and second tool blades.
- at least two tool blades are combined in a tool element and formed in one piece.
- the tool element may comprise an upper side member and a lower side member, which are interconnected by a peripheral edge.
- the invention also includes tool elements with more than two tool blades, for example three tool blades which are distributed at constant angular intervals around the rotary shaft.
- the outwardly curved end faces of a first tool blade and a second tool blade may be diametrically opposed with respect to the axis of rotation.
- the tool element is shaped such that the outer contour of the first tool blade leaf substantially corresponds to a point mirroring of the second tool blade through the axis of rotation.
- a further embodiment of the invention provides that a plurality of tool elements or tool blades arranged one behind the other, preferably evenly distributed, are provided on the rotary shaft in the direction of the axis of rotation.
- adjacent or immediately adjacent tool elements or tool blades are arranged angularly offset in the direction of the axis of rotation, which amplifies the Verwirbelungs bin in the vertical direction.
- the angular offset arrangement ensures that, for example, the turbulence generated on the leeward side is carried upwards in a vertical direction by the turbulences of the adjacent rotational blade following in the direction of rotation.
- the planar upper side member and the planar lower side member are spaced from each other and preferably arranged parallel to each other and connected by a flat outer contour, eg the front and rear side, or the peripheral edge, so that between the top and the lower side or the upper side component and the lower side component forms a cavity.
- a flat outer contour eg the front and rear side, or the peripheral edge
- the passage for the additives in the hollow shaft may communicate with the cavity, so that additives introduced into the rotating shaft may be ejected through the nozzles.
- the cavity then serves as a passage for the additives. It proves to be advantageous if, as described above, the top member and the bottom component are each part of two opposing tool blades. As a result, production costs can be saved and the assembly is considerably simplified.
- the tool comprises a temperature control device, preferably arranged in the rotary shaft, for tempering, ie for cooling and / or heating, the additives.
- the tempering device may have an inflow and an outflow for a tempering agent, e.g. have a heat transfer fluid such as cooling water.
- a tempering agent e.g. have a heat transfer fluid such as cooling water.
- the tool comprises at least two bushings and / or conduits provided in the hollow rotary shaft, such as pipes or the like, which extend in the axial direction of the rotary shaft, preferably parallel to the feedthrough for the additives and are connected to one another such that a temperature control can be pumped through the lines in the manner of a circuit.
- the tempering device has a passage for the passage or passage of temperature control, wherein the implementation of the additives is at least partially disposed in the passage for the tempering.
- Efficient temperature control is achieved in particular when the hollow rotary shaft is designed as a tube, in particular for the inflow of the temperature control means, so that, for example, the inflowing temperature control medium flows in the intermediate space between the feedthrough for the additives and the hollow rotary shaft.
- one or more lines or pipes extending parallel to the passage for the additives may be provided, in the lower part of the rotary shaft with the space between the passage for the additives and the rotary shaft, so the inflow, in communication and form a circumferential channel.
- the bushings On the side facing away from the tool blade or the tool blades side of the rotary shaft, the bushings may have corresponding connections for feeding and discharging for the tempering.
- a heat exchanger or the like can be connected to close the temperature control loop.
- the terminals may e.g. be provided in the form of radial rotary inlets that allow the supply of fluids into rotating leads.
- axial rotary joints To connect the bushing for the additives are axial rotary joints, which are connected to the upper end of the rotary shaft. Suitable rotary inlet are, for example, rotary entrances of DEUBLIN GmbH from Hofheim-Wallau, Germany.
- spacers may be provided between the pipes and an inner wall of the rotary shaft and / or between the pipes and the outer wall of the passage for the additives.
- the feedthrough for the additives is preferably arranged centrally in the hollow rotary shaft, so that the rotational axis of the feedthrough coincides with the rotational axis of the rotary shaft.
- a mixing device for mixing mixed material comprising a tool with the features described herein.
- a mixing device may, in particular, have a container, which is preferably mounted rotatably about a vertical axis, for receiving the mixed material. It proves to be particularly advantageous when the tool is rotatably mounted in a lid covering a container opening, so that the tool can be removed from the container together with the lid, and wherein the tool can be inserted into the container when the lid is placed over the container whose opening is positioned (so-called mixer bell).
- the mixing device may further comprise a mixing tool, such as a mixing helix or the like, wherein the mixing tool transports the mix by rotation substantially along a container wall of the container upwards and mixed.
- the tool or its shaft can basically have the connections described above for connecting a source of additives, such as gases, liquids or solids. These can be introduced by means of a pump or other suitable device for introducing the additives into the hollow shaft.
- the presentation in the FIG. 1 corresponds to a viewing direction along the axis of rotation 2 provided for the tool 1 shown.
- the illustrated plan view corresponds to a plane which runs perpendicular to the axis of rotation 2. Shown is the cross section of the tool 1 in this plane.
- the tool 1 comprises a shaft 3 with a hollow inner section 4. In operation, the tool 1 is rotated about the rotation axis 2 in a first direction of rotation 5.
- the tool 1 comprises a tool element 6 fastened to the shaft 3 with two mutually opposite tool blades 7 and 8.
- the first tool blade 7 extends radially outwardly in a first direction along the axis of rotation 2, as viewed in FIG. 1 illustrated X-axis.
- the second tool blade 8 extends along the X-axis in the opposite Direction.
- the tool 1 can be used as a mixer or as a chopper. In particular, in this case, you can call the tool blades as Zerhackerrance.
- the tool blades 7, 8 each have a wing-like contour.
- the tool blades 7, 8 each form an end face 9 facing the direction of rotation, while they each form a rear side 10 in the direction away from the direction of rotation 5.
- the end faces 9 are each formed as flat end faces and the rear sides 10 are formed as flat rear surfaces which extend in a direction parallel to the axis of rotation.
- the front side 9 is shaped so that it has an outwardly curved contour in the illustrated plan view. That means it's convex.
- the rear side 10 is shaped so that it has an inwardly curved contour, that is concave.
- the front side 9 and the rear side 10 are each connected by a blunt outer portion 11.
- the tool blade 7 or 8 ends in each case in this blunt outer portion 11, so that the tool blade 7, 8 has the shape of a truncated wing.
- the end faces 9 of the tool blades 7 and 8 are relative to the axis of rotation 2 diametrically opposite. The same applies to the rear sides 10 of the tool blades 7 and 8.
- the outer contour of the tool element 6 is such that the outer contour of the second tool blade 8 is formed by a point reflection of the outer contour of the first tool blade 7 through the rotation axis 2.
- a reference point 12 on the X-axis Shown is a reference point 12 on the X-axis. Also drawn is a reference line extending through this reference point 12 parallel to the Y-axis (dash-dot line). With increasing distance of this reference line from the axis of rotation 2 along the X-axis, a point intersecting this reference line on the face 9 is located radially farther from the axis of rotation 2 than a reference line intersecting point on the tail side 10. In the example shown, therefore, the radial Distance 13 of the end face 9 greater than the radial distance 14 of the rear side 10th
- FIG. 2 shows the flow conditions on the tool 1 and the tool element 6 when it is immersed in a mix, for example. Solids or a pasty mass, and rotates about the axis of rotation 2 in the direction of rotation 5.
- the curved shapes of the front and rear sides 9, 10 create areas along which the mix flows at different flow rates. Since the end face 9 is relatively flat and elongated radially outwards, high flow velocities at the end face 9, combined with a laminar flow, result. On the rear side 10, however, results in a very turbulent flow pattern with vortex formations in the mix. The flow velocity here is comparatively low compared to the front side.
- the different speeds result from the fact that the outwardly curved longer path at the end face 9 must be covered by the medium surrounding the rotating tool blade in the same time as at the inwardly curved rear-side sections 10 of the tool blade, where the inwardly curved edges Cause turbulence.
- the different speeds create stalls that lead to turbulent flows.
- the change from laminar to turbulent flows, the internal friction between these multiphase flows, and especially the pressure difference between the windward and leeward sides between the two areas cause additional mixing and a uniform distribution of the mix.
- FIG. 3 illustrated embodiment differs from the embodiment in the FIGS. 1 and 2 in that three tool elements 17, 18 and 19 are provided at the end of the rotary shaft 3, each also comprising two opposite tool blades 17a, 17b, 18a, 18b, 19a, 19b.
- the tool blade 19b is opposite to the tool blade 19a and therefore not visible.
- the rotary shaft 3 rotates in operation about the rotation axis 2 in the direction of rotation. 5
- the uppermost tool element 17 is aligned parallel to the lower tool element 19 with respect to the rotation axis 2.
- the central tool element 18 is arranged angularly offset with respect to the upper tool element 17 and the lower tool element 19. This also results in the vertical direction, i. in the direction of the axis of rotation 2, between the tool elements 17, 18 and 19 each turbulent flows 16, which also provide for mixing in the vertical direction.
- the uppermost tool element 17 comprises a planar upper side component 17c and an equally shaped lower side component 17d, which are arranged parallel to each other at a distance and by the peripheral edge, which inter alia Front and rear sides 9, 10 forms, connected to each other, so that in the interior of the tool blade 17a, 17b and the tool member 17 forms a cavity.
- the tool blades 17a and 17b share a common upper side member 17c and a common lower side member 17d, so that the tool blades 17a and 17b are partially formed integrally.
- a plurality of nozzles 20 are formed for introducing additives into the mix.
- the nozzles 20 communicate with the cavity of the respective tool blade, the cavity also being in communication with a passage in the shaft 3.
- additives such as. Gases, liquids or solids or combinations thereof can be passed through the nozzle 20 and introduced into the mix.
- FIG. 4 shows in a sectional view a tool 1 according to a further embodiment of the invention.
- the structure of the tool elements corresponds to that of the tool elements FIG. 3 ,
- tool blades 7.8 are provided.
- the rotary shaft 3 is formed here as a hollow shaft and has in its interior a passage 21 in the form of a conduit which communicates with the nozzles 20 of the tool blades 7, 8 at the lower end of the rotary shaft 3.
- Inside the rotary shaft 3 is a passage 22 for introducing or supplying a tempering (temperature control water) is provided.
- the feedthrough 22 is referred to as an inflow feedthrough.
- the temperature control water passage 22 is formed by the hollow inner portion 4 of the rotary shaft 3 with the additive feed passage 21 disposed inside the inner portion 4 so that a temperature control water flowing through the inner portion 4 is the passage 21 lapped for the additive.
- two lines 23 are further ( FIG. 6 ), which are also arranged in the passage for the temperature control water, but provide for the outflow of the temperature control water. These are referred to as drainage bushings.
- a holder 24 At the upper end of a holder 24 is arranged, with which the tool 1 can be attached to a mixer cover or the like. Also, a drive 25 for rotationally driving the rotary shaft 3 is provided.
- FIG. 5 shows the upper portion of the tool 1 from the FIG. 4 in the sectional view, but rotated by 90 ° about the axis of rotation.
- a supply 26 and a connection for the temperature control water is provided in the upper region of the rotary shaft 3.
- the temperature control water can be introduced into the inner portion 4 and the inflow passage 22 so that it flows in the interior space between the inside of the rotary shaft 3 and the additive feedthrough 21.
- the additive feedthrough 21 is arranged centrally in the rotary shaft 3 in the form of a tube.
- FIG. 6 is the lower portion of the tool 1 from the FIG. 4 shown.
- the additive passage 21 is in each case with the hollow interior spaces of the individual tool elements or tool blades in conjunction, which by curved arrows is indicated.
- the additive enters the interior of the tool blades 7, 8 and is introduced through the nozzles 20 in the mix, the shape of the tool blades 7, 8 as explained above, which causes advantageous Verwirbelungs bine.
- the additives reach the tool blades 7, 8, they are tempered by the temperature control water in the passage 22.
- the tempering may consist of cooling or heating of the additives.
- the passages 23 serving as a drain for the temperature control water are arranged in the form of conduits. These drain passages 23 are arranged on opposite sides of the additive passage 21. In the lower region, the discharge passages 23 have an opening 27, which communicate with the inlet passage 22 for the temperature control water. By means of the outflow passages 23, the temperature control water can thus be sucked off after passing through the inner section 4 in the lower region of the tool 1 and pumped upwards.
- the openings 27 protrude in the lower region of the tool 1 in a circumferential annular channel.
- 23 spacers 28 are provided between the inner wall of the rotary shaft 3 and the drain passages, which ensure the secure fit of the discharge passages 23 in the rotating rotary shaft 3.
- FIG. 7 shows the upper portion of the tool 1 from the FIG. 4 ,
- the drain passages 23 end in a drain 29, with a radial rotary inlet.
- the temperature control water is taken from the drain passages 23 and can be supplied to a heat exchanger, not shown, or another receptacle for the outflowing temperature control water.
- This heat exchanger not shown, can Also with the supply 26 for the inflow passage for the temperature control water are in communication, so that a temperature control circuit can be established.
- At the upper end of the rotary shaft 3 there is also an axial rotary inlet 30, via which the additives or the additive can be introduced into the additive passages 21, which is indicated by a downward arrow.
- FIG. 8 is again the lower portion of the tool 1 from the FIG. 4 shown in a viewing direction along the axis of rotation. Marked are the openings 27, which open into a circulation channel 31.
- This circulation channel 31 is in communication with the inner portion 4 and the inflow passage 22, so that even with rotation of the openings 27 always an optimal outflow of the temperature control water is guaranteed.
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- Chemical Kinetics & Catalysis (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
Die Erfindung betrifft ein Werkzeug (1) fĂ¼r eine Mischvorrichtung mit einem Behälter zur Aufnahme von Mischgut, in dem das Werkzeug (1) in einer ersten Drehrichtung (5) um eine Rotationsachse (2) rotiert, um das Mischgut zu zerkleinern und/oder zu mischen. Eine Drehwelle (3) mit wenigstens einem sich von der Drehwelle (3) radial nach auĂŸen erstreckenden Werkzeugblatt (7, 8, 17a, 17b, 18a, 18b, 19a, 19b) bildet in der ersten Drehrichtung (5) eine Stirnseite (9) mit in einer Ebene senkrecht zur Rotationsachse (2) nach auĂŸen gewölbter Kontur und in entgegengesetzter Richtung eine Heckseite (10) mit in einer Ebene senkrecht zur Rotationsachse (2) nach innen gewölbter Kontor aus. Das Werkzeugblatt (7, 8, 17a, 17b, 18a, 18b, 19a, 19b) weist wenigstens eine DĂ¼se (20) zum ZufĂ¼hren von Gasen, FlĂ¼ssigkeiten und/oder Feststoffen auf. Ferner betrifft die Erfindung eine Mischvorrichtung mit einem entsprechenden Werkzeug. The invention relates to a tool (1) for a mixing device with a container for holding mixed material, in which the tool (1) rotates about a rotation axis (2) in a first direction of rotation (5) in order to comminute and / or close the mixture Mix. A rotary shaft (3) with at least one tool blade (7, 8, 17a, 17b, 18a, 18b, 19a, 19b) extending radially outward from the rotary shaft (3) forms an end face (9) in the first direction of rotation (5). with in a plane perpendicular to the axis of rotation (2) outwardly curved contour and in the opposite direction a rear side (10) in a plane perpendicular to the axis of rotation (2) inwardly arched Kontor from. The tool blade (7, 8, 17a, 17b, 18a, 18b, 19a, 19b) has at least one nozzle (20) for supplying gases, liquids and / or solids. Furthermore, the invention relates to a mixing device with a corresponding tool.
Description
Die Erfindung betrifft ein Werkzeug, insbesondere zum Zerkleinern und/oder Mischen von Mischgut, fĂ¼r eine Mischvorrichtung mit einem Behälter zur Aufnahme des Mischguts, wobei das Werkzeug in dem Behälter in einer ersten Drehrichtung um eine Rotationsachse rotiert, um das Mischgut zu zerkleinern und/oder zu mischen, und wobei das Werkzeug eine Drehwelle mit wenigstens einem sich von der Drehwelle radial nach auĂŸen erstreckenden Werkzeugblatt aufweist, das in der ersten Drehrichtung eine Stirnseite und in einer der ersten Drehrichtung entgegengesetzten Richtung eine Heckseite ausbildet. Die Erfindung betrifft ferner eine Mischvorrichtung mit einem entsprechenden Werkzeug.The invention relates to a tool, in particular for comminuting and / or mixing of mixed material, for a mixing device with a container for receiving the mixed material, wherein the tool rotates in the container in a first rotational direction about an axis of rotation to crush the mix and / or and wherein the tool comprises a rotary shaft having at least one tool blade extending radially outward from the rotary shaft, forming a front end in the first rotational direction and a rear side in a direction opposite to the first rotational direction. The invention further relates to a mixing device with a corresponding tool.
GattungsgemĂ¤ĂŸe Werkzeuge werden in Mischvorrichtungen eingesetzt, um Mischgut oder SchĂ¼ttgut, beispielsweise trockene und/oder angefeuchtete Feststoffe zu durchmischen und/oder zu zerkleinern. Eine wesentliche Anforderung an solche Mischvorrichtungen ist eine ausreichende Mischwirkung, um eine gute Homogenität der Mischung zu gewährleisten. Der Begriff Mischgut kann eine Kombination verschiedener Stoffe, insbesondere Feststoffe wie Backmischungen kennzeichnen. Im Sinne der Erfindung fällt darunter aber auch ein einzelner Feststoff, wie z.B. Mehl, der durch die Mischvorrichtung bearbeitet wird. In einer Verarbeitungsstufe werden Zusatzstoffe (Additive) wie Gase, FlĂ¼ssigkeiten und/oder Feststoffen Kombinationen derselben in das Mischgut eingebracht. Hierbei kann es sich z.B. um Konservierungsmittel, Farbmittel, Farbstoff usw. oder auch nur um Luft handeln.Generic tools are used in mixing devices to mix or bulk material or bulk material, for example, dry and / or moistened solids to comminute and / or. An essential requirement for such mixing devices is a sufficient mixing action to ensure good homogeneity of the mixture. The term mix can be a combination of different substances, especially solids such as baking mixes. However, within the meaning of the invention, a single solid, such as e.g. Flour being processed by the blender. In a processing stage, additives (additives) such as gases, liquids and / or solids combinations thereof are introduced into the mix. This may be e.g. to be preservative, colorant, dye, etc. or even just air.
Aus dem Stand der Technik bekannte Mischvorrichtungen weisen einen um eine Hochachse drehbar gelagerten Behälter zur Aufnahme des Mischguts mit einer oberen Ă–ffnung auf. Durch die Ă–ffnung wird der Behälter mit Mischgut beladen. Ein Mischwerkzeug, z.B. eine drehbare Mischwelle mit wenigstens einer Wendel, ragt von oben durch die Ă–ffnung schräg zur Hochachse des Behälters in diesen hinein und rotiert. Das Werkzeug fährt durch das Mischgut und durchmischt die Stoffe, so dass diese zu einer homogenen Masse verarbeitet werden. Bei entsprechender Drehzahl findet nicht nur eine Durchmischung statt, sondern das Werkzeug zerkleinert das Mischgut zusätzlich. Solche Vorrichtungen werden in der Regel separat eingesetzt und sind unter dem Begriff Zerhacker oder Zerkleinerungswerkzeug bekannt. Dabei sorgt insbesondere die Stirnseite der Werkzeugblätter fĂ¼r eine Zerkleinerung des Mischgutes, indem diese mit hoher Geschwindigkeit auf das Mischgut trifft.Mixing devices known from the prior art have a container rotatably mounted about a vertical axis for receiving the mixed material with an upper opening. Through the opening of the container is loaded with mix. A mixing tool, for example a rotatable mixing shaft with at least one helix, protrudes from above through the opening obliquely to the vertical axis of the container into it and rotates. The tool moves through the mix and mixes the substances, so that they are processed to a homogeneous mass. At appropriate speed not only a mixing takes place, but the tool additionally comminutes the mix. Such devices are typically used separately and are known by the term chopper or comminution tool. In particular, the front side of the tool blades ensures a comminution of the mixed material by this hits the mix at high speed.
Aus der
Die in der
Bekannt ist, dass der Effizienz der durch das Mischgut fahrenden Werkzeuge gewisse Grenzen gesetzt sind, weil oftmals eine ungenĂ¼gende Materialbewegung des Mischguts stattfindet, so dass das Mischgut nicht zu einer homogenen Masse verarbeitet oder zerkleinert werden kann. Das hat auch zur Folge, dass die Additive nicht effizient in das Mischgut eingebracht werden können.It is known that the efficiency of moving through the mix tools certain limits are set, because often an insufficient material movement of the mix takes place, so that the mix is not a homogeneous Mass can be processed or shredded. This also means that the additives can not be efficiently introduced into the mix.
Aufgabe der vorliegenden Erfindung ist es, den Effizienzgrad eines derartigen Werkzeugs und einer Mischvorrichtung zu verbessern.The object of the present invention is to improve the degree of efficiency of such a tool and a mixing device.
Diese Aufgabe wird durch ein Werkzeug mit den Merkmalen des Anspruchs 1 und durch eine Mischvorrichtung mit den Merkmalen des Anspruchs 15 gelöst.This object is achieved by a tool having the features of
ErfindungsgemĂ¤ĂŸ weist die Stirnseite in einer Ebene senkrecht zur Rotationsachse eine nach auĂŸen gewölbte Kontur und die Heckseite in einer Ebene senkrecht zur Rotationsachse eine nach innen gewölbte Kontor auf, und das Werkzeugblatt weist wenigstens eine DĂ¼se zum ZufĂ¼hren von Additiven bzw. Gasen, FlĂ¼ssigkeiten und/oder Feststoffen auf.According to the invention, the end face in a plane perpendicular to the axis of rotation has an outwardly curved contour and the rear side in a plane perpendicular to the axis of rotation an inwardly curved Kontor, and the tool blade has at least one nozzle for supplying additives or gases, liquids and / or Solids.
Durch die besondere Kontur des Werkzeugblattes kommt es zu Geschwindigkeitsdifferenzen zwischen den Strömungen an Stirn- und Heckseite, wodurch im Bereich der Stirn- und Heckseite laminare und turbulente Strömungsverhältnissen im Mischgut hervorgerufen werden. Dadurch wird das Mischgut aufgewirbelt, besser vermischt und kann auch besser zerkleinert werden. Die erste Drehrichtung bezeichnet dabei die fĂ¼r den Betrieb einer Mischvorrichtung vorgesehene Drehrichtung des Werkzeugs. Durch die erfindungsgemĂ¤ĂŸe Blattgeometrie und die Möglichkeit, Additive wie Gase, FlĂ¼ssigkeiten oder Feststoffe oder Kombinationen dieser Stoffe während der Rotation aus dem Werkzeugblatt in das Mischgut einzubringen, wird das Ergebnis des Arbeitsprozesses maĂŸgeblich verbessert, weil die DĂ¼se unmittelbar in den Verwirbelungsbereichen eingesetzt ist. Das ZufĂ¼hren von Additiven Ă¼ber die DĂ¼sen bewirkt in Kombination mit den Werkzeugblättern eine zusätzliche Durchmischung und ein gleichmĂ¤ĂŸiges Verteilen der Additive.Due to the special contour of the tool blade, there are differences in speed between the flows at the front and rear sides, which causes laminar and turbulent flow conditions in the mix in the area of the front and rear sides. As a result, the mix is whirled up, mixed better and can also be better crushed. The first direction of rotation designates the direction of rotation of the tool intended for the operation of a mixing device. The sheet geometry according to the invention and the possibility of introducing additives such as gases, liquids or solids or combinations of these substances during rotation from the tool blade into the mix, the result of the working process is significantly improved because the nozzle is used directly in the Verwirbelungsbereichen. The feeding of additives through the nozzles, in combination with the tool blades, causes additional mixing and uniform distribution of the additives.
Die Ebene, die senkrecht zur Rotationsachse liegt, bezeichnet die Ebene, auf der die Rotationsachse senkrecht steht. Mit anderen Worten, die Rotationsachse liegt jeweils senkrecht zu den die Ebene aufspannenden und senkrecht zu einander liegenden Vektoren. Die entsprechende Blickrichtung entlang der Rotationsachse kann als die Draufsicht auf die Ebene bezeichnet werden. Die Stirnseite kann in Rotationsrichtung auch als eine vordere Kante des Werkzeugblattes und die Heckseite in Rotationsrichtung als eine hintere Kante des Werkzeugblattes bezeichnet werden.The plane perpendicular to the axis of rotation designates the plane on which the axis of rotation is vertical. In other words, the axis of rotation is in each case perpendicular to the plane spanning the plane and lying perpendicular to each other vectors. The corresponding viewing direction along the axis of rotation may be referred to as the plan view of the plane. The front side may also be referred to as a front edge of the tool blade in the rotational direction and the rear side in the direction of rotation as a rear edge of the tool blade.
In der fĂ¼r den Betrieb vorgesehenen Rotationsrichtung bildet der sich radial nach auĂŸen erstreckende Abschnitt des Werkzeugblatts die durch das Mischgut schneidende Stirnseite, insbesondere Stirnfläche aus. Die Stirnseite ist der Materialströmung, die an dem Werkzeugblatt entlang flieĂŸt, zugewandt und kann daher auch als Luv-Seite bezeichnet werden. Die RĂ¼ckseite oder so genannte Heckseite bezeichnet die Seite, die entgegengesetzt der Rotationsrichtung orientiert ist. Diese entspricht der Lee-Seite des Werkzeugblattes und kann entsprechend eine Heckfläche ausbilden. Das Werkzeugblatt bewegt sich um die Rotationsachse herum in einer Ebene, zu der die Rotationsachse der Welle orthogonal liegt.In the direction of rotation provided for the operation of the radially outwardly extending portion of the tool blade forms the intersecting end of the mix, in particular end face. The end face is the material flow, which flows along the tool blade, facing and therefore can also be referred to as windward side. The rear or so-called rear side refers to the side that is oriented opposite to the direction of rotation. This corresponds to the lee side of the tool blade and can form a rear surface accordingly. The tool blade moves around the axis of rotation in a plane to which the axis of rotation of the shaft is orthogonal.
Die Stirnseite kann in einer Blickrichtung entlang der Rotationsachse (Draufsicht) einen bogenförmigen Querschnitt bzw. eine bogenförmige Kontur aufweisen und sich dabei radial nach auĂŸen erstrecken und dabei einer ersten Achse, entlang welcher sich das Werkzeugblatt radial nach auĂŸen erstreckt, so annähern, dass sich eine nach auĂŸen gewölbte bzw. konvexe Kontur ausbildet. Auch die Heckseite erstreckt sich bogenförmig radial nach auĂŸen und nähert sich der ersten Achse an. Allerdings weist die Heckseite eine nach innen gewölbte, konkave Form bzw. Kontur auf.The end face can have an arcuate cross section or an arcuate contour in a viewing direction along the axis of rotation (plan view) and thereby extend radially outwards, thereby approximating a first axis, along which the tool blade extends radially outwards, such that a outwardly convex or convex contour forms. The rear side extends arcuately radially outwardly and approaches the first axis. However, the rear side has an inwardly curved, concave shape or contour.
ErfindungsgemĂ¤ĂŸ kann der Flächenanteil der Stirnfläche grĂ¶ĂŸer sein als der Flächenanteil der Heckseite an der Gesamtfläche der Stirn- und Heckseiten.According to the invention, the surface portion of the end face may be greater than the area proportion of the rear side of the total area of the front and rear sides.
ErfindungsgemĂ¤ĂŸ können die Drehwelle und das Werkzeugblatt wenigstens eine DurchfĂ¼hrung fĂ¼r Additive zu der wenigstens einen DĂ¼se aufweisen, so dass Additive durch die Drehwelle und das Werkzeugblatt aus der DĂ¼se in das Mischgut geleitet werden können. Zu diesem Zweck kann die Drehwelle als Hohlwelle bzw. Hohllanze zur DurchfĂ¼hrung entsprechender Medien ausgebildet sein oder als Hohlwelle gestaltet sein und ein Rohr oder eine Leitung aufnehmen. Die DurchfĂ¼hrung fĂ¼r die Additive weist wenigstens eine Ă–ffnung auf, die mit der DurchfĂ¼hrung in dem Werkzeugblatt verbunden ist. Die DĂ¼sen können in Form von Bohrungen, Ă–ffnungen oder dergleichen in dem Werkzeugblatt ausgebildet sein.According to the invention, the rotary shaft and the tool blade can have at least one passage for additives to the at least one nozzle, so that additives can be passed through the rotary shaft and the tool blade from the nozzle into the mix. For this purpose, the rotary shaft may be formed as a hollow shaft or hollow lance for carrying out appropriate media or designed as a hollow shaft and receive a pipe or a pipe. The passage for the additives has at least one opening which is connected to the passage in the tool blade. The nozzles may be formed in the form of holes, openings or the like in the tool blade.
Das erfindungsgemĂ¤ĂŸe Werkzeug kann als Mischwerkzeug eingesetzt werden, um das Mischgut zu durchmischen. Alternativ oder zusätzlich kann das Werkzeug als Zerkleinerungswerkzeug verwendet werden, um das Mischgut zu zerkleinern und damit das Mischergebnis zu verbessern. Die Erfindung ermöglicht es, die Funktionen eines Mischers und eines Zerkleinerungswerkzeugs vorteilhaft in ein Werkzeug zu integrieren. So kann das Werkzeug in Ergänzung zu einer Mischwendel, aber auch als Alternative zu der Mischwendel verwendet werden.The tool according to the invention can be used as a mixing tool to mix the mix. Alternatively or additionally, the tool can be used as a comminuting tool to comminute the mix and thus improve the mixing result. The invention makes it possible to advantageously integrate the functions of a mixer and a comminution tool into a tool. Thus, the tool can be used in addition to a mixing helix, but also as an alternative to the mixing helix.
Das Werkzeug ist drehbar gelagert, vorzugsweise in einem die Ă–ffnung des Behälters verschlieĂŸenden Deckel und durch einen geeigneten Antrieb, wie einen Elektromotor, rotatorisch angetrieben werden. Das Werkzeugblatt bzw. die Werkzeugblätter sind vorzugsweise an einem unteren, das heiĂŸt an dem in den Behälter hineinragenden Ende der Welle angeordnet.The tool is rotatably mounted, preferably in a lid closing the opening of the container and driven in rotation by a suitable drive, such as an electric motor. The tool blade or the tool blades are preferably arranged on a lower, that is to say on the end of the shaft projecting into the container.
In einer Draufsicht in Richtung der Rotationsachse kann das Werkzeugblatt eine das Blatt umlaufende AuĂŸenkontur aufweisen, die sich ähnlich einem FlĂ¼gel radial nach auĂŸen von der Welle erstreckt. Das Werkzeugblatt kann auĂŸerdem eine in eine erste Richtung der Rotationsachse gerichtete flächige Unterseite sowie eine in die entgegengesetzte Richtung gerichtete flächige Oberseite aufweisen. Die Seiten können durch eine Kante, z.B. an Stirn- und Heckseite, voneinander getrennt sein, wobei sich die Kante parallel zur Rotationsachse und/oder senkrecht zur Ober- bzw. Unterseite des Werkzeugblattes erstrecken kann. Die Kanten können aber auch schräg, z.B. als Schneidkanten, ausgebildet sein. In der Draufsicht weist das Werkzeugblatt einen Umfang auf, der sich entlang der Kante des Werkzeugblattes erstreckt.In a plan view in the direction of the axis of rotation, the tool blade may have an outer contour surrounding the blade, which extends radially outward from the shaft like a wing. The tool blade can also have a directed in a first direction of the axis of rotation flat underside and directed in the opposite direction flat top. The sides may be defined by an edge, e.g. on the front and rear side, be separated from each other, wherein the edge may extend parallel to the axis of rotation and / or perpendicular to the top or bottom of the tool blade. The edges can also be inclined, e.g. as cutting edges, be formed. In plan view, the tool blade has a circumference that extends along the edge of the tool blade.
Nach einer weiteren AusfĂ¼hrungsform der Erfindung kann das Werkzeugblatt in der Draufsicht in radialer Richtung bzw. radial auĂŸen in einem stumpfen AuĂŸenabschnitt enden. Der AuĂŸenabschnitt kann so gestaltet sein, dass er die Heck-und die Stirnseite miteinander verbindet. Der AuĂŸenabschnitt sorgt fĂ¼r verbesserte Strömungsbedingungen, so dass besonders starke und stabile Wirbelkonfigurationen entstehen, die fĂ¼r eine zusätzliche Vermischung des Mischgutes sorgen. Im Bereich des stumpfen AuĂŸenabschnittes trifft das Mischgut nicht wie auf der Stirnseite frontal auf die Vorderkante des Werkzeugblattes, sondern der AuĂŸenbereich des Werkzeugblattes wird am Mischgut vorbeigezogen und zieht eine kreisförmige Spur durch das Mischgut.According to a further embodiment of the invention, the tool blade can end in the plan view in the radial direction or radially outward in a blunt outer portion. The outer portion may be configured to interconnect the rear and front sides. The outer section provides improved flow conditions, resulting in particularly strong and stable vortex configurations that provide additional mixing of the mix. In the area of the blunt outer portion, the mix does not strike the front edge of the tool blade as on the front side, but the outer area of the tool blade is drawn past the mix and draws a circular track through the mix.
Vorzugsweise weist das Werkzeugblatt mehrere DĂ¼sen auf, die derart angeordnet sind, dass zumindest eine Anzahl der DĂ¼sen einen unterschiedlichen Abstand zu der Rotationsachse der Drehwelle aufweist. So können mehrere DĂ¼sen entlang der umlaufenden Kante des Werkzeugblattes derart verteilt sein, dass zumindest eine Anzahl der DĂ¼sen einen unterschiedlichen Abstand zu der Rotationsachse der Drehwelle aufweist. Zum Einen nimmt mit zunehmendem Abstand von der Mittelachse die Umfangsgeschwindigkeit des Werkzeugblattes zu, so dass die Schlagwirkung auf das Mischgut mit höherer Geschwindigkeit erfolgen kann. Mit anderen Worten, das Mischgut trifft im AuĂŸenbereich des Werkzeugblattes mit deutlich höherer Geschwindigkeit auf die Stirnfläche, als in der Nähe der Mittel- bzw. Rotationsachse. Gleichzeitig ist auch die Beschleunigung der Additive innerhalb des Werkzeugblattes in der Nähe der Rotationsachse geringer als am AuĂŸenumfang des Werkzeugblattes. Somit wird der Druck, mit dem die FlĂ¼ssigkeit aus der DĂ¼se tritt, variiert.Preferably, the tool blade has a plurality of nozzles which are arranged such that at least a number of the nozzles have a different distance from the axis of rotation of the rotary shaft. Thus, a plurality of nozzles may be distributed along the circumferential edge of the tool blade such that at least a number of the nozzles have a different distance from the axis of rotation of the rotary shaft. On the one hand increases with increasing distance from the central axis of the peripheral speed of the tool blade, so that the impact on the mix can be done at a higher speed. In other words, the mixture hits the outer surface of the tool blade at a much higher speed on the end face, as in the vicinity of the central or rotational axis. At the same time, the acceleration of the additives within the tool blade in the vicinity of the axis of rotation is less than on the outer circumference of the tool blade. Thus, the pressure at which the liquid exits the nozzle is varied.
Wird das Werkzeug als Zerhacker eingesetzt, indem es bei hoher Drehzahl gefahren wird, bewirkt die Zentrifugalkraft, dass das Additiv im Werkzeugblatt nach auĂŸen geschleudert wird, wodurch es eine hohe Beschleunigung erfährt und dadurch mit hohem Druck aus den DĂ¼sen austreten kann.When the tool is used as a chopper by being driven at high speed, the centrifugal force causes the additive to be thrown outward in the tool blade, causing it to experience high acceleration and thereby leak out of the nozzles at high pressure.
Eine weitere AusfĂ¼hrungsform der Erfindung sieht vor, dass das Werkzeugblatt zumindest an der Stirnseite und/oder an der Heckseite eine Anzahl von DĂ¼sen aufweist. Vorzugsweise weist auch der stumpfe AuĂŸenabschnitt zumindest eine DĂ¼se auf. Die DĂ¼sen sind in Umfangsrichtung des Werkzeugblattes entlang der das Werkzeugblatt umgebenden Kante verteilt. Indem das Additiv an der Stirn-und an der Heckseite in das Mischgut eingebracht wird, kommt es zu besonders vorteilhaften Effekten in diesen Bereichen. An der Stirnseite tritt das SchĂ¼tt- und/oder Mischgut mit hoher Geschwindigkeit auf die Vorderkante des Werkzeugblattes und auf die DĂ¼sen. Bei entsprechender Rotationsgeschwindigkeit zerplatzt das Mischgut und fächert den austretenden Additivstrom weiter auf, so dass die Verteilung der Additive verbessert wird. An der Heckseite bilden sich Verwirbelungen des SchĂ¼tt- und/oder Mischgutes, die sich mit dem nahezu ungestört austretenden Additivstrom vermischen.A further embodiment of the invention provides that the tool blade has a number of nozzles at least on the front side and / or on the rear side. Preferably, the blunt outer portion also has at least one nozzle. The nozzles are distributed in the circumferential direction of the tool blade along the edge surrounding the tool blade. By introducing the additive into the mix at the front and at the rear, particularly advantageous effects occur in these areas. At the front side, the bulk material and / or mix enters the leading edge of the tool blade and the nozzles at high speed. At the appropriate rotational speed, the mixture bursts and fanning the exiting flow of additive further, so that the distribution of the additives is improved. At the rear side, turbulence of the bulk and / or mixed material is formed, which mixes with the almost undisturbed emerging additive flow.
Um die Geschwindigkeitsdifferenzen zwischen der Stirnseite und der Heckseite zu erhöhen, sieht eine weitere AusfĂ¼hrungsform der Erfindung vor, dass sich das Werkzeug in einer ersten Richtung bzw. entlang einer ersten Achse senkrecht zur Drehachse radial nach auĂŸen erstreckt und dass mit zunehmendem Abstand in der ersten Richtung von der Rotationsachse der radiale Abstand zwischen der Stirnseite und der Rotationsachse grĂ¶ĂŸer ist als der radiale Abstand zwischen der Heckseite und der Rotationsachse. Dabei kann jeweils ein Bezugspunkt auf der Achse in der ersten Richtung gewählt werden, auf den der jeweilige Punkt der Stirnseite bzw. der Heckseite in der Draufsicht senkrecht projiziert wird.In order to increase the speed differences between the front side and the rear side, a further embodiment of the invention provides that the tool is perpendicular in a first direction or along a first axis extends radially outward to the axis of rotation and that with increasing distance in the first direction from the axis of rotation of the radial distance between the end face and the axis of rotation is greater than the radial distance between the rear side and the axis of rotation. In this case, in each case a reference point on the axis in the first direction can be selected, on which the respective point of the front side or the rear side is projected vertically in plan view.
Vorzugsweise weist das Werkzeug zwei in der Ebene senkrecht zur Rotationsachse gegenĂ¼berliegende Werkzeugblätter auf. Diese sind dann vorzugsweise in einem Werkzeugelement zusammengefasst oder bilden ein Werkzeugelement. Es hat sich als besonders vorteilhaft herausgestellt, wenn die beiden Werkzeugblätter zumindest teilweise integral miteinander verbunden sind. Zu diesem Zweck kann das Werkzeugelement zumindest ein Bauteil aufweisen, das einen Abschnitt des ersten Werkzeugblattes und einen Abschnitt des zweiten Werkzeugblattes ausbildet. Zum Beispiel kann das Werkzeugelement ein flächiges Oberseitenbauteil und ein flächiges Unterseitenbauteil aufweisen, wobei das Oberseitenbauteil und das Unterseitenbauteil jeweils einen Abschnitt des ersten und des zweiten Werkzeugblattes ausbilden. Nach einer weiteren AusfĂ¼hrungsform sind wenigstens zwei Werkzeugblätter in einem Werkzeugelement zusammengefasst und einstĂ¼ckig ausgebildet. Zu diesem Zweck kann das Werkzeugelement ein Oberseitenbauteil und ein Unterseitenbauteil aufweisen, die durch eine umlaufende Kante miteinander verbunden sind. Vom Erfindungsgedanken umfasst sind auch Werkzeugelemente mit mehr als zwei Werkzeugblättern, so zum Beispiels drei Werkzeugblätter, die in konstanten Winkelabständen um die Drehwelle herum verteilt sind.Preferably, the tool has two in the plane perpendicular to the axis of rotation opposite tool blades. These are then preferably combined in a tool element or form a tool element. It has been found to be particularly advantageous if the two tool blades are at least partially integrally connected to each other. For this purpose, the tool element may comprise at least one component which forms a portion of the first tool blade and a portion of the second tool blade. For example, the tool element may include a planar top member and a planar bottom member, wherein the top member and the bottom member each form a portion of the first and second tool blades. According to another embodiment, at least two tool blades are combined in a tool element and formed in one piece. For this purpose, the tool element may comprise an upper side member and a lower side member, which are interconnected by a peripheral edge. The invention also includes tool elements with more than two tool blades, for example three tool blades which are distributed at constant angular intervals around the rotary shaft.
Um die Verwirbelungen zu verstärken, können die nach auĂŸen gewölbten Stirnseiten eines ersten Werkzeugblatts und eines zweiten Werkzeugblatts in Bezug auf die Rotationsachse diametral gegenĂ¼berliegen. Das Gleiche gilt fĂ¼r die nach innen gewölbten Heckseitenabschnitte. Das bedeutet, dass das Werkzeugelement so geformt ist, dass die AuĂŸenkontur des ersten Werkzeugblattblattes im Wesentlichen einer Punktspiegelung des zweiten Werkzeugblattes durch die Rotationsachse entspricht.To reinforce the turbulences, the outwardly curved end faces of a first tool blade and a second tool blade may be diametrically opposed with respect to the axis of rotation. The same goes for the after inside arched tail sections. This means that the tool element is shaped such that the outer contour of the first tool blade leaf substantially corresponds to a point mirroring of the second tool blade through the axis of rotation.
Um effiziente Verwirbelungen und turbulente Strömungen in einer Richtung entlang der Rotationsachse der Drehwelle zu erzielen, sieht eine weitere AusfĂ¼hrungsform der Erfindung vor, dass an der Drehwelle in Richtung der Rotationsachse mehrere Werkzeugelemente oder Werkzeugblätter hintereinander angeordnet, vorzugsweise gleichmĂ¤ĂŸig verteilt, vorgesehen sind.In order to achieve efficient turbulence and turbulent flows in one direction along the axis of rotation of the rotary shaft, a further embodiment of the invention provides that a plurality of tool elements or tool blades arranged one behind the other, preferably evenly distributed, are provided on the rotary shaft in the direction of the axis of rotation.
In WeiterfĂ¼hrung dieses Erfindungsgedankens sind in Richtung der Rotationsachse nebeneinander liegende bzw. unmittelbar benachbarte Werkzeugelemente oder Werkzeugblätter winkelversetzt angeordnet, was den Verwirbelungseffekt in vertikaler Richtung verstärkt. Durch die winkelversetzte Anordnung wird sichergestellt, dass beispielsweise die auf der Leeseite erzeugten Verwirbelungen durch die Verwirbelungen des in Rotationsrichtung nachfolgenden benachbarten Rotationsblatts in vertikaler Richtung nach oben getragen werden.In continuation of this inventive concept adjacent or immediately adjacent tool elements or tool blades are arranged angularly offset in the direction of the axis of rotation, which amplifies the Verwirbelungseffekt in the vertical direction. The angular offset arrangement ensures that, for example, the turbulence generated on the leeward side is carried upwards in a vertical direction by the turbulences of the adjacent rotational blade following in the direction of rotation.
Nach einer weiteren AusfĂ¼hrungsform der Erfindung sind das flächige Oberseitenbauteil und das flächige Unterseitenbauteil beabstandet voneinander und vorzugsweise parallel zueinander angeordnet und durch eine flächige AuĂŸenkontur, z.B. der Stirn- und Heckseite, bzw. der umlaufenden Kante, miteinander verbunden, so dass sich zwischen der Oberseite und der Unterseite bzw. dem Oberseitenbauteil und dem Unterseitenbauteil ein Hohlraum ausbildet. In der AuĂŸenkontur können mehrere DĂ¼sen vorgesehen sein. Ferner kann die DurchfĂ¼hrung fĂ¼r die Additive in der Hohlwelle mit dem Hohlraum in Verbindung stehen, so dass in die Drehwelle eingeleitete Additive durch die DĂ¼sen ausgestoĂŸen werden können. Der Hohlraum dient dann als DurchfĂ¼hrung fĂ¼r die Additive. Es erweist sich als vorteilhaft, wenn, wie oben beschrieben, das Oberseitenbauteil und das Unterseitenbauteil jeweils Bestandteil zweier gegenĂ¼berliegender Werkzeugblätter sind. Dadurch lassen sich Produktionskosten einsparen und die Montage ist erheblich vereinfacht.According to a further embodiment of the invention, the planar upper side member and the planar lower side member are spaced from each other and preferably arranged parallel to each other and connected by a flat outer contour, eg the front and rear side, or the peripheral edge, so that between the top and the lower side or the upper side component and the lower side component forms a cavity. In the outer contour, a plurality of nozzles may be provided. Further, the passage for the additives in the hollow shaft may communicate with the cavity, so that additives introduced into the rotating shaft may be ejected through the nozzles. The cavity then serves as a passage for the additives. It proves to be advantageous if, as described above, the top member and the bottom component are each part of two opposing tool blades. As a result, production costs can be saved and the assembly is considerably simplified.
Nach einer weiteren AusfĂ¼hrungsform umfasst das Werkzeug eine vorzugsweise in der Drehwelle angeordnete Temperiervorrichtung zum Temperieren, also zum KĂ¼hlen und/oder Erwärmen, der Additive. Die Temperiervorrichtung kann einen Zufluss und einen Abfluss fĂ¼r ein Temperierungsmittel z.B. eine TemperierflĂ¼ssigkeit wie KĂ¼hlwasser aufweisen. So ist es beispielsweise möglich, die Temperiervorrichtung in einen Temperaturregelkreislauf einzubinden, indem man den Zufluss und den Abfluss mit einem Wärmetauscher oder dergleichen verbindet.According to a further embodiment, the tool comprises a temperature control device, preferably arranged in the rotary shaft, for tempering, ie for cooling and / or heating, the additives. The tempering device may have an inflow and an outflow for a tempering agent, e.g. have a heat transfer fluid such as cooling water. For example, it is possible to integrate the temperature control device in a temperature control circuit by connecting the inflow and the outflow with a heat exchanger or the like.
Nach einer weiteren AusfĂ¼hrungsform der Erfindung umfasst das Werkzeug wenigstens zwei in der hohlen Drehwelle vorgesehene DurchfĂ¼hrungen und/oder Leitungen, wie Rohre oder dergleichen, die sich in axialer Richtung der Drehwelle, vorzugsweise parallel zur DurchfĂ¼hrung fĂ¼r die Additive erstrecken und miteinander derart verbunden sind, dass eine TemperierflĂ¼ssigkeit nach Art eines Kreislaufs durch die Leitungen gepumpt werden kann.According to a further embodiment of the invention, the tool comprises at least two bushings and / or conduits provided in the hollow rotary shaft, such as pipes or the like, which extend in the axial direction of the rotary shaft, preferably parallel to the feedthrough for the additives and are connected to one another such that a temperature control can be pumped through the lines in the manner of a circuit.
Nach einer weiteren AusfĂ¼hrungsform ist vorgesehen, dass die Temperiervorrichtung eine DurchfĂ¼hrung zum DurchfĂ¼hren oder Durchleiten von Temperierungsmittel aufweist, wobei die DurchfĂ¼hrung fĂ¼r die Additive zumindest teilweise in der DurchfĂ¼hrung fĂ¼r die Temperierungsmittel angeordnet ist. Eine effiziente Temperierung wird insbesondere dann erzielt, wenn die hohle Drehwelle als Rohr, insbesondere fĂ¼r den Zufluss des Temperierungsmittels, ausgebildet ist, so dass z.B. das zuflieĂŸende Temperierungsmittel im Zwischenraum zwischen der DurchfĂ¼hrung fĂ¼r die Additive und der hohlen Drehwelle flieĂŸt. Zum AbfĂ¼hren des Temperierungsmittel können ein oder mehrere sich parallel zur DurchfĂ¼hrung fĂ¼r die Additive erstreckende Leitungen oder Rohre vorgesehen sein, die im unteren Bereich der Drehwelle mit dem Zwischenraum zwischen der DurchfĂ¼hrung fĂ¼r die Additive und der Drehwelle, also dem Zufluss, in Verbindung stehen und einen umlaufenden Kanal bilden.According to a further embodiment, it is provided that the tempering device has a passage for the passage or passage of temperature control, wherein the implementation of the additives is at least partially disposed in the passage for the tempering. Efficient temperature control is achieved in particular when the hollow rotary shaft is designed as a tube, in particular for the inflow of the temperature control means, so that, for example, the inflowing temperature control medium flows in the intermediate space between the feedthrough for the additives and the hollow rotary shaft. For discharging the tempering means, one or more lines or pipes extending parallel to the passage for the additives may be provided, in the lower part of the rotary shaft with the space between the passage for the additives and the rotary shaft, so the inflow, in communication and form a circumferential channel.
Auf der dem Werkzeugblatt oder den Werkzeugblättern abgewandten Seite der Drehwelle können die DurchfĂ¼hrungen entsprechende AnschlĂ¼sse zum Zu- und AbfĂ¼hren fĂ¼r die Temperierungsmittel aufweisen. An die AnschlĂ¼sse kann ein Wärmetauscher oder dergleichen angeschlossen werden, um den TemperaturRegelkreis zu schlieĂŸen. Im unteren Bereich der Drehwelle stehen der Zufluss und der Abfluss miteinander in Verbindung. Die AnschlĂ¼sse können z.B. in Form von radialen DreheinfĂ¼hrungen vorgesehen sein, die die ZufĂ¼hrung von FlĂ¼ssigkeiten in rotierende Zuleitungen ermöglichen. Zum AnschlieĂŸen der DurchfĂ¼hrung fĂ¼r die Additive eignen sich axiale DreheinfĂ¼hrungen, die an das obere Ende der Drehwelle angeschlossen werden. Geeignete DreheinfĂ¼hrung sind beispielsweise DreheinfĂ¼hrungen der DEUBLIN GmbH aus Hofheim-Wallau, Deutschland.On the side facing away from the tool blade or the tool blades side of the rotary shaft, the bushings may have corresponding connections for feeding and discharging for the tempering. To the terminals, a heat exchanger or the like can be connected to close the temperature control loop. In the lower part of the rotary shaft, the inflow and outflow communicate with each other. The terminals may e.g. be provided in the form of radial rotary inlets that allow the supply of fluids into rotating leads. To connect the bushing for the additives are axial rotary joints, which are connected to the upper end of the rotary shaft. Suitable rotary inlet are, for example, rotary entrances of DEUBLIN GmbH from Hofheim-Wallau, Germany.
Um Leitungen oder Rohre fĂ¼r den Zu- oder Abfluss optimal zu platzieren und Bewegungen innerhalb der Drehwelle zu unterbinden, können Abstandshalter zwischen den Leitungen und einer Innenwand der Drehwelle und/oder zwischen den Leitungen und der AuĂŸenwand der DurchfĂ¼hrung fĂ¼r die Additive vorgesehen sein. Vorzugsweise ist die DurchfĂ¼hrung fĂ¼r die Additive zentral in der hohlen Drehwelle angeordnet, so dass die Rotationsachse der DurchfĂ¼hrung mit der Rotationsachse der Drehwelle zusammenfällt.In order to optimally place pipes or pipes for the inflow or outflow and to prevent movements within the rotary shaft, spacers may be provided between the pipes and an inner wall of the rotary shaft and / or between the pipes and the outer wall of the passage for the additives. The feedthrough for the additives is preferably arranged centrally in the hollow rotary shaft, so that the rotational axis of the feedthrough coincides with the rotational axis of the rotary shaft.
Die der Erfindung zugrunde liegende Aufgabe wird ferner durch eine Mischvorrichtung zum Mischen von Mischgut gelöst, die ein Werkzeug mit den hierin beschriebenen Merkmalen umfasst. Eine derartige Mischvorrichtung kann insbesondere einen vorzugsweise drehbar um eine Hochachse gelagerten Behälter zur Aufnahme des Mischguts vorweisen. Als besonders vorteilhaft erweist es sich, wenn das Werkzeug in einem eine Behälteröffnung abdeckbaren Deckel drehend gelagert ist, so dass das Werkzeug zusammen mit dem Deckel von dem Behälter entfernt werden kann und wobei das Werkzeug in den Behälter eingefĂ¼hrt werden kann, wenn der Deckel auf den Behälter aufgesetzt bzw. Ă¼ber dessen Ă–ffnung positioniert wird (sogenannte Mischerglocke). Die Mischvorrichtung kann ferner ein Mischwerkzeug, wie bspw. eine Mischwendel oder dergleichen, vorweisen, wobei das Mischwerkzeug das Mischgut durch Rotation im Wesentlichen entlang einer Behälterwand des Behälters nach oben transportiert und durchmischt. Das Werkzeug bzw. dessen Welle kann grundsätzlich die oben beschriebenen AnschlĂ¼sse zum AnschlieĂŸen einer Quelle fĂ¼r Additive, wie Gase, FlĂ¼ssigkeiten oder Feststoffen vorweisen. Diese können mittels einer Pumpe oder einer anderen geeigneten Vorrichtung zum Einbringen der Additive in die Hohlwelle eingefĂ¼hrt werden.The object underlying the invention is further achieved by a mixing device for mixing mixed material comprising a tool with the features described herein. Such a mixing device may, in particular, have a container, which is preferably mounted rotatably about a vertical axis, for receiving the mixed material. It proves to be particularly advantageous when the tool is rotatably mounted in a lid covering a container opening, so that the tool can be removed from the container together with the lid, and wherein the tool can be inserted into the container when the lid is placed over the container whose opening is positioned (so-called mixer bell). The mixing device may further comprise a mixing tool, such as a mixing helix or the like, wherein the mixing tool transports the mix by rotation substantially along a container wall of the container upwards and mixed. The tool or its shaft can basically have the connections described above for connecting a source of additives, such as gases, liquids or solids. These can be introduced by means of a pump or other suitable device for introducing the additives into the hollow shaft.
Weiterbildungen, Vorteile und Anwendungsmöglichkeiten der Erfindung ergeben sich auch aus der nachfolgenden Beschreibung von AusfĂ¼hrungsbeispielen und den Zeichnungen. Dabei bilden alle beschriebenen und/oder bildlich dargestellten Merkmale fĂ¼r sich oder in beliebiger Kombination den Gegenstand der Erfindung, auch unabhängig von ihrer Zusammenfassung in den AnsprĂ¼chen oder deren RĂ¼ckbezĂ¼gen.Further developments, advantages and applications of the invention will become apparent from the following description of exemplary embodiments and the drawings. All described and / or illustrated features alone or in any combination form the subject matter of the invention, regardless of their summary in the claims or their back references.
Es zeigen:
- Fig. 1
- in einer Draufsicht in einer Blickrichtung entlang einer Rotationsachse ein Werkzeug nach einer ersten AusfĂ¼hrungsform der Erfindung;
- Fig. 2
- das Werkzeug aus
Fig. 1 mit schematisch dargestellten Strömungsverhältnissen; - Fig. 3
- ein Werkzeug gemĂ¤ĂŸ einer weiteren AusfĂ¼hrungsform der Erfindung in einer perspektivischen Ansicht; und
- Fig. 4
- in einer Schnittansicht ein Werkzeug nach einer weiteren AusfĂ¼hrungsform der Erfindung;
- Fig. 5
- in einer Schnittansicht einen oberen Abschnitts des Werkzeugs aus
Figur 4 ; - Fig. 6
- in einer Schnittansicht einen unteren Abschnitts des Werkzeugs aus
Figur 4 ; - Fig. 7
- in einer Schnittansicht einen oberen Abschnitts des Werkzeugs aus
Figur 4 ; und - Fig. 8
- in einer Draufsicht den unteren Abschnitt des Werkzeugs aus
Figur 4 .
- Fig. 1
- in a plan view in a viewing direction along a rotation axis, a tool according to a first embodiment of the invention;
- Fig. 2
- the tool off
Fig. 1 with schematically shown flow conditions; - Fig. 3
- a tool according to another embodiment of the invention in a perspective view; and
- Fig. 4
- in a sectional view of a tool according to another embodiment of the invention;
- Fig. 5
- in a sectional view of an upper portion of the tool
FIG. 4 ; - Fig. 6
- in a sectional view of a lower portion of the tool
FIG. 4 ; - Fig. 7
- in a sectional view of an upper portion of the tool
FIG. 4 ; and - Fig. 8
- in a plan view of the lower portion of the tool
FIG. 4 ,
Die Darstellung in der
Das Werkzeug 1 umfasst ein an der Welle 3 befestigtes Werkzeugelement 6 mit zwei sich gegenĂ¼berliegenden Werkzeugblättern 7 und 8. Das erste Werkzeugblatt 7 erstreckt sich ausgehend von der Rotationsachse 2 radial nach auĂŸen in einer ersten Richtung entlang der in der
Wie die in der
Die Stirnseite 9 ist so geformt, dass sie in der dargestellten Draufsicht eine nach auĂŸen gewölbte Kontur aufweist. Das bedeutet, sie ist konvex geformt. Dagegen ist die Heckseite 10 so geformt, dass sie eine nach innen gewölbte Kontur aufweist, also konkav geformt ist.The
Die Stirnseite 9 und die Heckseite 10 sind jeweils durch einen stumpfen AuĂŸenabschnitt 11 miteinander verbunden. Das Werkzeugblatt 7 bzw. 8 endet jeweils in diesem stumpfen AuĂŸenabschnitt 11, so dass das Werkzeugblatt 7, 8 die Form eines abgestumpften FlĂ¼gels aufweist.The
Die Stirnseiten 9 der Werkzeugblätter 7 und 8 stehen sich bezogen auf die Rotationsachse 2 diametral gegenĂ¼ber. Das Gleiche trifft auf die Heckseiten 10 der Werkzeugblätter 7 und 8 zu. Tatsächlich ist die AuĂŸenkontur des Werkzeugelements 6 derart, dass die AuĂŸenkontur des zweiten Werkzeugblattes 8 durch eine Punktspiegelung der AuĂŸenkontur des ersten Werkzeugblattes 7 durch die Rotationsachse 2 gebildet wird.The end faces 9 of the
Eingezeichnet ist ein Bezugspunkt 12 auf der X-Achse. Eingezeichnet ist auch eine durch diesen Bezugspunkt 12 parallel zur Y-Achse verlaufende Bezugslinie (Strich-Punkt-Linie). Mit zunehmendem Abstand dieser Bezugslinie von der Rotationsachse 2 entlang der X-Achse, liegt ein diese Bezugslinie schneidender Punkt auf der Stirnseite 9 radial weiter entfernt von der Drehachse 2 als ein die Bezugslinie schneidender Punkt auf der Heckseite 10. Im dargestellten Beispiel ist daher der radiale Abstand 13 der Stirnseite 9 grĂ¶ĂŸer als der radiale Abstand 14 der Heckseite 10.Shown is a
Die
Die gewölbten Formen der Stirn- und Heckseiten 9, 10 erzeugen Bereiche, entlang derer das Mischgut mit unterschiedlichen Strömungsgeschwindigkeiten strömt. Da die Stirnseite 9 radial nach auĂŸen hin relativ flach und langgezogen ist, ergeben sich hohe Strömungsgeschwindigkeiten an der Stirnseite 9, kombiniert mit einer laminaren Strömung. An der Heckseite 10 ergibt sich dagegen ein sehr turbulentes Strömungsbild mit Wirbelbildungen im Mischgut. Die Strömungsgeschwindigkeit hier ist im Vergleich zur Stirnseite vergleichsweise niedrig. Die unterschiedlichen Geschwindigkeiten resultieren daraus, dass die nach auĂŸen gewölbte längere Wegstrecke an der Stirnseite 9 von dem das rotierende Werkzeugblatt umgebende Medium in der gleichen Zeit zurĂ¼ckgelegt werden muss, wie an den nach innen gewölbten heckseitigen Abschnitten 10 des Werkzeugblattes, wo die nach innen gewölbten Kanten Verwirbelungen verursachen. Durch die unterschiedlichen Geschwindigkeiten entstehen Strömungsabrisse, die zu turbulenten Strömungen fĂ¼hren. Der Wechsel von laminaren zu turbulenten Strömungen, die inneren Reibungen zwischen diesen Mehrphasenströmungen und insbesondere der Druckunterschied zwischen der Luv- und der Leeseite zwischen den beiden Gebieten bewirken eine zusätzliche Durchmischung und ein gleichmĂ¤ĂŸiges Verteilen des Mischguts.The curved shapes of the front and
Wie in der Figur eingezeichnet ist, entstehen in Bereichen entlang der Stirnseiten 9 die laminaren Strömungen 15 mit hoher Geschwindigkeit. Im Bereich der Heckseiten 10 entsteht aufgrund der niedrigeren Strömungsgeschwindigkeiten ein turbulentes Strömungsbild mit Wirbelbildungen 16. Diese Strömungen bewirken eine hohe Durchmischung des Mischgutes.As shown in the figure, arise in areas along the end faces 9, the laminar flows 15 at high speed. In the area of the
Die in der
Das oberste Werkzeugelement 17 ist in Bezug auf die Rotationsachse 2 parallel zum unteren Werkzeugelement 19 ausgerichtet. Dagegen ist das mittlere Werkzeugelement 18 in Bezug auf das obere Werkzeugelement 17 und das untere Werkzeugelement 19 winkelversetzt angeordnet. Dadurch entstehen auch in vertikaler Richtung, d.h. in Richtung der Rotationsachse 2, zwischen den Werkzeugelementen 17, 18 und 19 jeweils turbulente Strömungen 16, die auch fĂ¼r eine Durchmischung in vertikaler Richtung sorgen.The
Beispielhaft sei am obersten Werkzeugelement 17 der Aufbau der Werkzeugelemente 17, 18, 19 bzw. der Werkzeugblätter erläutert. Das oberste Werkzeugelement 17 umfasst ein flächiges Oberseitenbauteil 17c und ein gleichermaĂŸen geformtes Unterseitenbauteil 17d, die parallel zueinander in einem Abstand angeordnet sind und durch die umlaufende Kante, die unter anderem die Stirn- und Heckseiten 9, 10 ausbildet, miteinander verbunden, so dass sich im Inneren des Werkzeugblattes 17a, 17b bzw. des Werkzeugelements 17 ein Hohlraum ausbildet. Die Werkzeugblätter 17a und 17b teilen sich ein gemeinsames Oberseitenbauteil 17c und ein gemeinsames Unterseitenbauteil 17d, so dass die Werkzeugblätter 17a und 17b teilweise integral ausgebildet sind.By way of example, the structure of the
An den Stirnseiten 9 und an den Heckseiten 10, wie auch jeweils am stumpfen AuĂŸenabschnitt 11 der Werkzeugblätter 17a, 17b, 18a, 18b, 19a, 19b sind mehrere DĂ¼sen 20 zum Einbringen von Additiven in das Mischgut ausgebildet. Die DĂ¼sen 20 stehen mit dem Hohlraum des jeweiligen Werkzeugblattes in Verbindung, wobei der Hohlraum auch mit einer DurchfĂ¼hrung in der Welle 3 in Verbindung steht. Durch die DurchfĂ¼hrung und den Hohlraum können Additive, wie bspw. Gase, FlĂ¼ssigkeiten oder Feststoffe oder Kombinationen davon durch die DĂ¼sen 20 geleitet und so in das Mischgut eingebracht werden.At the end faces 9 and at the
Durch die Rotation des Werkzeugs 1 entstehen durch die Werkzeugelemente 17, 18 und 19 turbulente Strömungsverhältnisse 16, die auch zu inneren Reibungen zwischen diesen Mehrphasenströmungen fĂ¼hren. Es entstehen Druckschwankungen zwischen den Gebieten laminarer Strömung und turbulenter Strömung, die eine zusätzliche Durchmischung bewirken. Infolge dessen werden Additive gleichmĂ¤ĂŸig verteilt. Das Einbringen von Additiven sorgt auch fĂ¼r eine Auflockerung des Mischgutes und unterstĂ¼tzt die Vermischung positiv.As a result of the rotation of the
Die
Im Innenabschnitt 4 der Drehwelle 3 sind ferner zwei Leitungen 23 (
Die
In der
Wie die
Die
In der
- 11
- WerkzeugTool
- 22
- Rotationsachseaxis of rotation
- 33
- Drehwellerotary shaft
- 44
- Innenabschnittinner portion
- 55
- Drehrichtungdirection of rotation
- 66
- Werkzeugelementtool element
- 77
- Werkzeugblatttool blade
- 88th
- Werkzeugblatttool blade
- 99
- Stirnseitefront
- 1010
- Heckseiterear side
- 1111
- stumpfer AuĂŸenabschnittdull outer section
- 1212
- Bezugspunktreference point
- 1313
- radialer Abstandradial distance
- 1414
- radialer Abstandradial distance
- 1515
- laminare Strömunglaminar flow
- 1616
- turbulente Strömungturbulent flow
- 1717
- Werkzeugelementtool element
- 17a17a
- Werkzeugblatttool blade
- 17b17b
- Werkzeugblatttool blade
- 17c17c
- OberseitenbauteilTop part
- 17d17d
- UnterseitenbauteilUnderside members
- 1818
- Werkzeugelementtool element
- 18a18a
- Werkzeugblatttool blade
- 18b18b
- Werkzeugblatttool blade
- 1919
- Werkzeugelementtool element
- 19a19a
- Werkzeugblatttool blade
- 19b19b
- Werkzeugblatttool blade
- 2020
- DĂ¼sejet
- 2121
- DurchfĂ¼hrung fĂ¼r AdditivCarrying out for additive
- 2222
- DurchfĂ¼hrung fĂ¼r Temperaturregelwasser (Zufluss)Feedthrough for temperature control water (inflow)
- 2323
- DurchfĂ¼hrung fĂ¼r Temperaturregelwasser (Abfluss)Passage for temperature control water (drain)
- 2424
- Halterungbracket
- 2525
- rotatorischer Antriebrotary drive
- 2626
- ZufĂ¼hrungenadditions
- 2727
- Ă–ffnungenopenings
- 2828
- Abstandshalterspacer
- 2929
- Abflussoutflow
- 3030
- axiale DreheinfĂ¼hrungaxial rotary inlet
- 3131
- Umlaufkanalcirculation channel
Claims (15)
dadurch gekennzeichnet, dass die Stirnseite (9) in einer Ebene senkrecht zur Rotationsachse (2) eine nach auĂŸen gewölbte Kontur und die Heckseite (10) in einer Ebene senkrecht zur Rotationsachse (2) eine nach innen gewölbte Kontor aufweist; und
dass das Werkzeugblatt (7, 8, 17a, 17b, 18a, 18b, 19a, 19b) wenigstens eine DĂ¼se (20) zum ZufĂ¼hren von Gasen, FlĂ¼ssigkeiten und/oder Feststoffen aufweist.Tool (1) for a mixing device with a container for receiving mixed material, in which the tool (1) rotates about a rotation axis (2) in a first direction of rotation (5) in order to comminute and / or mix the mixture Tool (1) a rotary shaft (3) with at least one of the rotary shaft (3) radially outwardly extending tool blade (7, 8, 17a, 17b, 18a, 18b, 19a, 19b), wherein the tool blade (7, 8 , 17a, 17b, 18a, 18b, 19a, 19b) in the first direction of rotation (5) forms a front side (9) and in a direction opposite to the first direction of rotation (5) a rear side (10);
characterized in that the end face (9) in a plane perpendicular to the axis of rotation (2) has an outwardly curved contour and the rear side (10) in a plane perpendicular to the axis of rotation (2) has an inwardly arched Kontor; and
in that the tool blade (7, 8, 17a, 17b, 18a, 18b, 19a, 19b) has at least one nozzle (20) for supplying gases, liquids and / or solids.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016100147.3A DE102016100147A1 (en) | 2016-01-05 | 2016-01-05 | Tool for a mixing device and mixing device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3192582A1 true EP3192582A1 (en) | 2017-07-19 |
EP3192582B1 EP3192582B1 (en) | 2020-02-26 |
Family
ID=57614186
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16205611.3A Active EP3192582B1 (en) | 2016-01-05 | 2016-12-21 | Tool for a mixing device, mixing device comprising the tool and use of the tool |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3192582B1 (en) |
DE (1) | DE102016100147A1 (en) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3734471A (en) * | 1970-11-24 | 1973-05-22 | Draiswerke Gmbh | Device for continuous mixing of solids with liquids |
DE2425727C3 (en) | 1973-06-15 | 1982-02-04 | Nautamix Patent Ag, Zug | Device for treating substances, in particular for mixing granular, powdery, pasty and / or liquid masses |
DE4104621A1 (en) * | 1991-02-15 | 1992-08-20 | Abs Pumpen Ag | Propeller for stirring, mixing or pumping fluids - comprises blades fitted with pipes via which gas or powder can be mixed with fluid being agitated |
JPH0538423A (en) * | 1991-06-26 | 1993-02-19 | Shoshu Kin | Gas dissolution device |
DE9412503U1 (en) * | 1994-08-03 | 1994-11-24 | Wrobel Jan | Device for gassing and stirring liquids |
DE19723325C1 (en) | 1997-06-04 | 1999-01-28 | Alhard Ruberg | Batch mixer |
DE19857775A1 (en) * | 1998-12-04 | 2000-06-08 | Ver Energiewerke Ag | Enclosed paddle mixer has sparge arms used for both bulk solids drying and hydration operations |
US20090110559A1 (en) * | 2007-10-25 | 2009-04-30 | Midan Industries Ltd. | Submersible mixing propeller |
-
2016
- 2016-01-05 DE DE102016100147.3A patent/DE102016100147A1/en not_active Ceased
- 2016-12-21 EP EP16205611.3A patent/EP3192582B1/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3734471A (en) * | 1970-11-24 | 1973-05-22 | Draiswerke Gmbh | Device for continuous mixing of solids with liquids |
DE2425727C3 (en) | 1973-06-15 | 1982-02-04 | Nautamix Patent Ag, Zug | Device for treating substances, in particular for mixing granular, powdery, pasty and / or liquid masses |
DE4104621A1 (en) * | 1991-02-15 | 1992-08-20 | Abs Pumpen Ag | Propeller for stirring, mixing or pumping fluids - comprises blades fitted with pipes via which gas or powder can be mixed with fluid being agitated |
JPH0538423A (en) * | 1991-06-26 | 1993-02-19 | Shoshu Kin | Gas dissolution device |
DE9412503U1 (en) * | 1994-08-03 | 1994-11-24 | Wrobel Jan | Device for gassing and stirring liquids |
DE19723325C1 (en) | 1997-06-04 | 1999-01-28 | Alhard Ruberg | Batch mixer |
DE19857775A1 (en) * | 1998-12-04 | 2000-06-08 | Ver Energiewerke Ag | Enclosed paddle mixer has sparge arms used for both bulk solids drying and hydration operations |
US20090110559A1 (en) * | 2007-10-25 | 2009-04-30 | Midan Industries Ltd. | Submersible mixing propeller |
Also Published As
Publication number | Publication date |
---|---|
DE102016100147A1 (en) | 2017-07-06 |
EP3192582B1 (en) | 2020-02-26 |
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