EP2902110A1 - Dispositif de broyage de matières solides ou des suspensions présentant des teneurs en matières solides et procédé de démarrage d'un processus de broyage d'un dispositif de broyage - Google Patents

Dispositif de broyage de matières solides ou des suspensions présentant des teneurs en matières solides et procédé de démarrage d'un processus de broyage d'un dispositif de broyage Download PDF

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Publication number
EP2902110A1
EP2902110A1 EP15000096.6A EP15000096A EP2902110A1 EP 2902110 A1 EP2902110 A1 EP 2902110A1 EP 15000096 A EP15000096 A EP 15000096A EP 2902110 A1 EP2902110 A1 EP 2902110A1
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EP
European Patent Office
Prior art keywords
drive shaft
stirring
stirring elements
elements
grinding
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
Application number
EP15000096.6A
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German (de)
English (en)
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EP2902110B1 (fr
Inventor
Arne Götzel
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Netzsch Feinmahltechnik GmbH
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Netzsch Feinmahltechnik GmbH
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Publication of EP2902110A1 publication Critical patent/EP2902110A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
    • B02C17/163—Stirring means

Definitions

  • the present invention relates to a device for the crushing of solids or suspensions with solids fractions and to a method for starting a comminuting process of a grinding device.
  • Grinding devices for solids or ball mills are designed for comminuting solids for certain degrees of fineness and generally comprise a rotating grinding chamber in which a plurality of grinding media or grinding balls for comminuting the respective solid are arranged.
  • the mills or the grinding chamber of the respective ball mill are filled by a central opening in one of the end walls.
  • the discharge depends on the design and takes place, for example, through slots in the grinding chamber wall at the end of the mill, the grinding bodies being retained due to their increased maximum cross-sectional diameter in relation to the slots and remaining in the grinding chamber or in the grinding container.
  • Agitator ball mills consist of a vertically or horizontally arranged, usually approximately cylindrical grinding container, which is filled depending on the particular grinding process in practice to 70% - 90% with grinding media or with grinding balls.
  • the grinding container is usually stationary and not rotatably mounted in such Rlickwerkskugelmühlen.
  • an agitator is arranged in the grinding container and moved in rotation over a drive shaft.
  • regrind is continuously pumped through the grinding chamber.
  • the suspended solids are crushed or dispersed by impact and shear forces between the grinding media.
  • At the discharge of the mill continues to be a separation of regrind and grinding media by means of a suitable separation system.
  • Agitator ball mills known from the prior art are capable of carrying mineral fillers in dry form to crush.
  • solid fractions in suspensions can be comminuted by means of stirred ball mills.
  • Such a stirred ball mill shows, for example, the patent application DE 10 2010 056 287 A1 .
  • the agitator ball mill disclosed in the DE specification comprises a grinding container and a stirring shaft rotating therein, on which a plurality of grinding elements are arranged. Between the grinding elements several additional elements are arranged, which should support the milling process or the comminution process of solids. According to the DE patent application, the additional elements are designed as rods.
  • the agitator shaft is connected to a motor for rotary operation.
  • a drive shaft which has to absorb high torque at the beginning and is thus exposed to high torsion, in practice during multiple operation after some time to tend to fatigue, so that methods and devices would be desirable, which allow longer use of the drive shaft.
  • the object of the invention is therefore to provide an apparatus and a method which do not have at least some of the disadvantages known from the prior art.
  • the invention relates to a device for comminution of solids or suspensions with solid fractions.
  • the device is designed in preferred embodiments as agitator ball mill and comprises a grinding container with a plurality of recorded in the grinding container grinding media.
  • such a device can be used for the comminution of solids or suspensions with solids content in the food industry, in the field of chemistry and / or in the field of pharmacy. It is also conceivable that solids are comminuted via the device or by means of the method according to the invention, which are formed by minerals.
  • the grinding container may have a cylindrical shape and be positioned, for example, vertically or horizontally. With regard to shaping, positioning and volume, numerous known possibilities can be envisaged for the person skilled in the art, so that this is not explicitly discussed.
  • the grinding container is preferably stationary and non-rotating and in this case oriented horizontally or horizontally.
  • the grinding container for this purpose may have corresponding openings.
  • the grinding media may usefully be designed as grinding balls and, taking into account the solid to be comminuted, have different diameters in various embodiments.
  • the device comprises a drive shaft extending into the milling container at the end face and a plurality of stirring elements positioned in the grinding container and rotatingly movable by the drive shaft.
  • the drive shaft can pass through a lid of the grinding container and is usefully brought into connection with a motor.
  • the engine and the drive shaft may optionally be interposed with a gear with one or more gear ratios.
  • the drive shaft rotates or rotates the plurality of stirring elements relative to the grinding container.
  • the plurality of stirring elements may be formed for example by rods, blades or the like.
  • the stirring elements are formed at least partially via stirring discs which are described in more detail below.
  • the stirring elements may be positioned along the longitudinal axis of the drive shaft, so that the longitudinal axis of the drive shaft is formed as a rotation axis for the plurality of stirring elements. It is also conceivable that a plurality of stirring elements or all stirring elements extend radially away from the drive shaft and in the direction of the grinding container, optionally via projections described in greater detail below.
  • a rotational play or a degree of freedom is formed between at least one of the several stirring elements and the drive shaft, which rotational play allows a coaxial and limited relative rotational movement of the at least one stirring element to the drive shaft.
  • All the stirring elements and the drive shaft can thus rotate with a common rotation about a common longitudinal axis or the longitudinal axis of the drive shaft.
  • the at least one of the plurality of stirring elements can be moved relative to the drive shaft and limited to rotate about the longitudinal axis of the drive shaft.
  • a device according to the invention for processing solids is started, the result is first a rotating movement of the drive shaft, wherein the at least one stirring element is not moved together with the drive shaft due to the rotational play.
  • the stirring element rests unmoved in the grinding container, so that a breakaway torque, which must be taken at the start of the crushing process of the drive shaft, compared to a continuously rotatable Connection of all stirring elements with the drive shaft is made smaller.
  • a torque peak or the maximum torque to be absorbed via the drive shaft can be reduced in an embodiment of a device according to the invention and by means of a method according to the invention.
  • the entire device is thus also installable in places with low space capacity.
  • the device can have a reduced energy consumption compared to devices for comminution already known from the prior art. Also, the method described in more detail below has the advantages described.
  • the transmission thus has to absorb less load, simplified transmissions can be used, resulting in economic advantages and an increased service life of the respective transmission. Even with gearboxes, the corresponding dimensioning can be reduced, which is why the device according to the invention is characterized by a compact design.
  • drive shafts with smaller dimensions or with reduced cross-sectional diameter can be used, which are cheaper to buy and can be characterized by a lower mass and a reduced space requirement.
  • the coaxial relative rotational movement of the at least one stirring element to the drive shaft or the rotational play is limited according to the invention. If a device according to the invention for processing of solids is started, this results-as already mentioned above-in a rotating movement of the drive shaft, wherein the at least one stirring element starts at the beginning Rotation due to the rotational play is not rotated together with the drive shaft.
  • the drive shaft has assumed a specific relative position or a specific relative rotational position with respect to the at least one stirring element, then during the further rotation the at least one stirring element is moved in rotation together with the drive shaft and via the drive shaft.
  • the relative position of the at least one stirring element and the drive shaft is maintained from jointly rotating movement.
  • a mechanical coupling between the at least one stirring element and the drive shaft can take place.
  • the rotational frequency of the at least one stirring element is identical to the rotational frequency of the drive shaft.
  • the rotating movement of the drive shaft and the rotating stirring via the drive shaft stirring elements is stopped. Subsequently, at least one of the stirring elements can be decoupled from the drive shaft and moved relative to the drive shaft via the previously described rotational play. If a comminution process is restarted, then the stirring element is initially not coupled to the drive shaft. The breakaway torque is formed reduced compared to a continuous coupling of all the stirring elements with the drive shaft. If the drive shaft driven in rotation, it can continue to rotate from a rotational movement of the drive shaft by less than 360 °, a coupling of at least one stirring element with the drive shaft.
  • the drive shaft can be stopped for this purpose after the initiation of a rotating movement of all the stirring elements and, subsequently, be rotated in the reverse direction of rotation. After stopping the drive shaft, the grinder can be taken out of service for a certain time, wherein the drive shaft is not moved. If a new comminution process is to be started, the drive shaft can be rotated in the reverse direction.
  • a rotational play between the drive shaft and the at least one stirring element can thus be formed independently of the respective direction of rotation of the drive shaft between the drive shaft and the at least one stirring element.
  • the breakaway torque for the drive shaft due to the initially not formed coupling between the drive shaft and the at least one stirring element is formed reduced even when restarting or re-starting a crushing process with the reverse direction of rotation of the drive shaft.
  • the coupling between the respective stirring element and the drive shaft is released manually. It may also be that the device is brought into operative connection with a restoring device, which solves the coupling of one or more stirring element with the drive shaft after completion of a crushing process and moves the or the respective stirring elements in the region of the limited rotational play relative to the drive shaft.
  • a rotational play is formed, in preferred embodiments, however, between a plurality, for example, three or more than three stirring elements, and the drive shaft is formed a rotational play to reduce the breakaway torque accordingly and of the already mentioned benefits to make extensive use.
  • the at least one of the plurality of stirring elements has only a certain degree of freedom relative to the drive shaft via the rotational play, while further relative movements of the at least one stirring element to the drive shaft, for example in the axial direction, are prevented.
  • the relative position of the at least one stirring element to the drive shaft in the longitudinal direction of the drive shaft is predetermined or fixed.
  • one or more driver elements are brought into operative connection with the at least one stirring element and the drive shaft coupled to the at least one stirring element for common rotation to the drive shaft at a predefined relative rotational position of the drive shaft to at least one stirring element.
  • the term "couple” must here be understood broadly, so that any possibilities can be provided in various embodiments, in which the at least one stirring elements right and / or left-handed by the drive shaft and together with the drive shaft is coaxially movable.
  • embodiments have proven in which via the coupling between the at least one stirring element and the drive shaft, a positive and / or positive connection between the at least one stirring element and the drive shaft is made.
  • At least one of the plurality of stirring elements is brought without rotational play firmly connected to the drive shaft.
  • a relative rotational movement between the drive shaft and this stirring element is not possible throughout.
  • the at least one stirring element, which is brought without rotation play firmly connected to the drive shaft sit on the drive shaft and secured by screw and / or clamping and / or welding and / or other connections to the drive shaft.
  • the grinding bodies or grinding balls arranged in the grinding container can thus already be moved by the at least one stirring element which is fixedly connected to the drive shaft.
  • the movement of the grinding balls has the effect of reducing the breakaway torque acting on the drive shaft during the subsequent coupling of one or more further stirring elements to the drive shaft.
  • the moment transmitted by the at least one stirring element when coupled to the drive shaft is reduced, since the grinding bodies or grinding balls are at least partly already moved.
  • at least one stirring element or exactly one stirring element is non-rotatably in rotation or without rotational play with the drive shaft in connection.
  • stirring elements which are brought without rotation play firmly connected to the drive shaft, combined to form a module and can be fixed releasably to a front-side flange portion of the drive shaft. Since no relative movement to the shaft is possible between the drive shaft and the stirring elements without rotational play, if the device comprises a plurality of stirring elements without rotational play, relative movements between the individual stirring elements are prevented without rotational play.
  • the module via screw or the like at a front end of the drive shaft to be releasably connected to the drive shaft.
  • more and at least two such stirring elements are present, which are firmly connected to the drive shaft without rotational play.
  • the at least two such stirring elements may be arranged adjacent along the longitudinal axis of the drive shaft and connected to the drive shaft or coupled to the drive shaft.
  • the at least two such stirring elements may each have projections for the purpose of movement of grinding bodies and ground material with rotating movement of the respective stirring elements, wherein the projections of the stirring elements are aligned with each other.
  • At least one of the stirring elements is designed as a stirring disc, which in each case has a plurality of projections pointing away from the drive shaft.
  • the at least one stirring element, between which and the drive shaft, a rotational play is formed be designed as a stirring disc and having a plurality of the drive shaft facing away from projections.
  • the projections of the several stirring elements or stirring disks can be oriented in alignment with each other after the coupling of the several stirring elements or stirring disks with the drive shaft.
  • stirring elements are present, which are firmly connected to the drive shaft without rotational play, the projections of the stirring discs with rotational play to the projections of the stirring discs can be aligned with each other without rotation in a common rotation or rotation.
  • all stirring elements designed as agitating disks may each comprise a plurality of projections pointing away from the drive shaft, with the projections being formed when the at least one stirring element is coupled for common rotation on the drive shaft all of the stirring elements formed as stirring discs are aligned with each other.
  • a rotational play is formed, which allows a coaxial and limited relative rotational movement of the plurality of stirring elements to the drive shaft, wherein at least two of these stirring elements are independently rotatably movable.
  • one or more first stirring elements can first be coupled to the drive shaft and then one or more second stirring elements can be coupled to the drive shaft.
  • a successive coupling may be useful in order to reduce the respective maximum torque which acts on the drive shaft when the stirring elements are coupled.
  • one or more stirring elements themselves each form one or more drivers, via which drivers they initiate a rotational movement of one or more further stirring elements, which form a rotational play relative to the drive shaft, after their incipient rotational movement.
  • the one or more stirring elements which in each case form one or more drivers, can be connected to the drive shaft in a rotationally fixed manner in a continuous manner and / or form a rotational play with respect to the drive shaft.
  • the groove can in this case be introduced parallel to the axis of rotation of the drive shaft in the drive shaft. If the at least two stirring elements, which are combined via a drive rod oriented parallel to the drive shaft, not coupled to the drive shaft and the drive shaft can be moved relative to the at least two stirring elements in the context of rotational play, as well as the Mit supportivestab is moved relative to the drive shaft and can in this case in preferred embodiments with the drive shaft in surface contact.
  • the Mit livelystab can immerse in the corresponding groove of the drive shaft, so that the at least two stirring elements resulting from the drive shaft rotatably coupled or rotatably connected are. Accordingly, when coupling a positive connection between the respective Mitauerstab and the drive shaft may be formed.
  • a plurality of first stirring elements are combined via at least one first Mitschstab and a plurality of second stirring elements are summarized via at least one second Mit resumestab, wherein the plurality of first stirring elements and the plurality of second stirring elements during a rotational movement of the drive shaft by less than 360 ° successively via the respective Mit resumestabes be coupled to the drive shaft.
  • the drive shaft forms a groove in which after coupling a plurality of driver rods are arranged parallel to the longitudinal axis of the drive shaft.
  • the drive shaft can form an identical number of grooves corresponding to the number of entrainment bars corresponding to the respective entrainment bars.
  • the drive rods associated with the respective stirring element (s) may at least approximately simultaneously be immersed in their respective corresponding groove or disposed in their respective corresponding groove.
  • the drive shaft is connected to at least one and preferably two drivers extending away from the drive shaft, which are guided against a respective associated stop of the stirring element at a certain relative rotational position of the at least one stirring element to the drive shaft. If two such drivers are present, they may be formed in one piece. The at least two drivers can point radially away from the drive shaft. If the at least one driver extending away from the drive shaft comes into surface contact with the stop of the stirring element, a coupling between the drive shaft and the stirring element can be formed and the respective stirring element can be driven in rotation by the drive shaft during its further rotational movement.
  • the at least one driver extending away from the drive shaft is held detachably on the drive shaft, for example via a connection with a feather key.
  • the at least one driver extending away from the drive shaft is fixed to the drive shaft, for example via non-positive and / or positive connections, provided that a rotationally fixed connection between the at least one driver and the drive shaft can be ensured.
  • a rotational play is formed, wherein the plurality of stirring elements rotatably connected to each other. If the at least one of the drive shaft weg grude driver is guided against the respective associated stop of one of the plurality of stirring elements, all rotatably interconnected stirring elements via the drive shaft or via the at least one extending away from the drive shaft driver can be moved in rotation.
  • one or more stirring elements to be moved in rotation over the driver extending away from the drive shaft and for one or more stirring elements themselves, as already described above, to have their own drivers via which the one or more stirring elements arrive after their beginning Rotational movement, a rotational movement of one or more other stirring elements, which form a rotational play relative to the drive shaft, initiate.
  • each stirring element, between which and the drive shaft, a rotational play is formed at least one own driver for non-rotatable coupling with the drive shaft is assigned.
  • the invention further relates to a method for starting a comminution process of solids or suspensions with solid fractions of a grinding device.
  • the grinding apparatus for implementing the method according to the invention comprises a grinding container having a plurality of grinding bodies received in the grinding container, at least one drive shaft extending into the milling container at the end side and a plurality of stirring elements positioned in the grinding container and rotatingly movable by the drive shaft. About the rotating movement of the stirring elements via the grinding media or via grinding balls the respective ground material is crushed by impact and shear forces.
  • a rotating movement of at least one stirring element via one of the rotational movement of the drive shaft resulting and the incipient rotational movement of the drive shaft temporally downstream coupling between the at least one stirring element and the drive shaft initiated.
  • a non-positive and / or positive connection between the at least one stirring element and the drive shaft can be produced.
  • At least one stirring element Since the rotating movement of at least one stirring element is arranged downstream of the incipient rotational movement of the drive shaft, a breakaway torque, which acts on the drive shaft when the rotational movement begins, can be reduced. If the at least one stirring element is moved via the drive shaft, the at least one stirring element and the drive shaft rotate coaxially.
  • At least one of the plurality of stirring elements is fixedly connected to the drive shaft and is rotatably moved together with the drive shaft at the beginning of rotational movement of the drive shaft.
  • a plurality of stirring elements are fixedly connected to the drive shaft and are rotated at the beginning of rotational movement of the drive shaft at the same time by the drive shaft in rotation.
  • the rotating movement of at least two stirring elements is introduced successively and in each case temporally after the beginning of the rotational movement of the drive shaft.
  • the rotational movements of more than two, for example three or four, stirring elements can be initiated successively and chronologically after the rotational movement of the drive shaft has begun.
  • a plurality of stirring elements are combined whose rotational movement is initiated at the same time and after the beginning of rotational movement of the drive shaft via a rotating coupling between the plurality of stirring elements and the drive shaft.
  • a plurality of first stirring elements and a plurality of second stirring elements may be combined.
  • the rotating movement of the first plurality of stirring elements can be initiated at the same time and after the beginning of rotational movement of the drive shaft, while subsequently the rotating movement of several second stirring elements is initiated at the same time.
  • several stirring elements can be combined to form further groups, for example a plurality of third and fourth stirring elements, wherein the rotational movements of the groups are initiated in succession.
  • projections of the plurality of stirring elements extend in the direction away from the drive shaft, wherein after initiation of rotational movement of all stirring elements, the projections of at least two stirring elements are aligned with each other.
  • At least one of the plurality of stirring elements is fixedly connected to the drive shaft and is rotatably moved together with the drive shaft at the beginning of rotational movement of the drive shaft.
  • the stirring element fixedly connected to the drive shaft may in this case have projections which preferably point radially away from the drive shaft and optionally in the direction of an inner wall of the grinding container. If another stirring element is coupled to the drive shaft in terms of time after the beginning of the rotational movement, its projections can be oriented in alignment with the projections of the stirring element fixedly connected to the drive shaft.
  • the drive shaft is stopped in time after initiation of a rotating movement of all the stirring elements and, subsequently, is rotated in the reverse direction of rotation.
  • the coupling between the at least one stirring element and the drive shaft can be temporarily released and subsequently produced from the rotational movement in the reverse direction as a result. If the coupling is restored, the at least one stirring element is rotated in the reverse direction together with the drive shaft.
  • the drive shaft is subsequently moved in the reverse direction of rotation until the coupling between the at least one stirring element and the drive shaft is canceled. After canceled coupling between the at least a stirring element and the drive shaft, the drive shaft can in turn be rotated in the first or in the previous direction of rotation.
  • FIG. 1 shows a schematic perspective view of an embodiment of a device according to the invention 1.
  • the device 1 is provided for the crushing processing of solids or suspensions with solid fractions and in the present case as agitator ball mill 2 is formed.
  • the solids which are comminuted by means of the device 1 may be formed, for example, by minerals.
  • the grinding container 5 is immovable or stored stationary and can frontally optionally via a in FIG. 1 unrecognizable container bottom and container lid have.
  • Reference numeral 4 refers to a part of a drive shaft, which via an intermediate gear with a for clarity in the figures This patent is not shown in the present application motor. Since the grinding container 5 is immovably mounted or formed stationary, the drive shaft 4 rotates relative to the grinding container. 5
  • first stirring elements 3 to 3c as well as a plurality of second stirring elements 6 to 6d are shown, which are rotatable in a plurality of first stirring elements 3 to 3c and which a plurality of second stirring elements 6 to 6d are rotatable via the drive shaft 4 or about the longitudinal axis L of the drive shaft 4.
  • first stirring elements 3 to 3c are each designed as a stirring disk
  • second stirring elements 6 to 6d are combined to form a module 20 and connected to one another in a torque-proof manner.
  • the stirring elements 3 to 3c designed as stirring disks also form a module 10.
  • Both the first stirring elements 3 to 3c and the second stirring elements 6 to 6d comprise for movement of the grinding balls arranged in the grinding chamber 5 and the ground material respectively projections 7 to 7c and 9 to 9d, which projections 7 to 7c and 9 to 9d with rotating movement of first stirring elements 3 to 3c and the second stirring elements 6 to 6d via the drive shaft 4 have an aligned orientation to each other and point radially away from the drive shaft 4 in the direction of an inner wall of the grinding container 5.
  • the geometric configuration of the projections 7 to 7c and 9 to 9d shown in the figures of the present patent application is to be understood as an example only.
  • the projections 7 to 7c and / or the projections 9 to 9d have further shapes and in this case be formed for example by rods and / or blades.
  • the number of the first stirring elements 3 to 3c and the second stirring elements 6 to 6d was chosen only by way of example.
  • the longitudinal axis L of the drive shaft 4 is also formed as a rotation axis for the stirring elements 3 to 3c and 6 to 6d.
  • the second stirring elements 6 to 6d are non-rotatably connected with each other and with the drive shaft 4, so that at an incipient rotational movement of the drive shaft 4 and startup of the device 1, the second stirring elements 6 to 6d are already rotated synchronously with the drive shaft 4.
  • Load peaks which would act on the drive shaft 4 with continuous solid coupling of all stirring elements 3 to 3c and 6 to 6d, are formed reduced in the device 1, whereby a lower torsion of the drive shaft 4 and a longer life is associated.
  • the rotational play or the degree of freedom between the first stirring elements 3 to 3c and the drive shaft 4 is limited in the device 1. If a rotational movement of the drive shaft 4 is initiated, then the stirring elements 3 to 3c are initially not rotationally fixedly coupled to the drive shaft 4 in order to be able to correspondingly reduce the breakaway torque of the drive shaft 4 when the rotational movement begins.
  • the drive shaft 4 assumes a certain relative rotational position to the first stirring elements 3 to 3c, in which the first stirring elements 3 to 3c with the Drive shaft 4 is coupled and rotatably connected to the drive shaft 4 in combination.
  • FIG. 1 shows a first embodiment, such as such a coupling or such a rotationally fixed connection between the first stirring elements 3 to 3c and the drive shaft 4 at certain relative rotational position of the drive shaft 4 can be made to the first stirring elements 3 to 3c.
  • two driver rods 12 and 12a which summarize the first stirring elements 3 to 3c and interconnect non-rotatably with each other, can be seen.
  • the first stirring elements 3 to 3c are combined to form a module 10, so that a relative rotational movement of the stirring elements 3 to 3c to each other by means of the driving rods 12 and 12a is prevented.
  • the relative position of the first stirring elements 3 to 3c along the longitudinal axis L of the drive shaft 4 is fixedly determined via the driver rods 12 and 12a, so that the stirring elements 3 to 3c have no further degrees of freedom with respect to the drive shaft 4 in addition to the rotational play.
  • the driver rods 12 and 12a dip into corresponding grooves of the drive shaft 4 and couple the stirring elements 3 to 3c to the drive shaft 4 via positive locking FIG. 1 the drive shaft 4 itself forms the grooves for coupling the first stirring elements 3 to 3c.
  • aids are placed on the drive shaft 4, which form the grooves and rotatably connected to the drive shaft in connection.
  • the first stirring elements 3 to 3c are moved in synchronism with the drive shaft 4.
  • the relative rotational position of the drive shaft 4 to the first stirring elements 3 to 3c is continuously maintained from the coupling of the first stirring elements 3 to 3c via the driving rods 12 and 12a.
  • the driver rods 12 and 12a are slidably brought into surface contact with the outer lateral surface of the drive shaft 4 at relative rotational movement of the drive shaft 4 to the first stirring elements 3 to 3c on the outer circumferential surface of the drive shaft 4 along.
  • both driver rods 12 and 12a with relative rotational movement of the drive shaft 4 to the first stirring elements 3 to 3c, at least approximately simultaneously enter their respective assigned groove.
  • a course of the grooves, which in FIG. 1 are introduced into the drive shaft 4, is here parallel to the longitudinal axis L of the drive shaft 4 oriented.
  • the grooves have a longitudinal extent parallel to the axis of rotation L, which corresponds in terms of their dimensioning at least one longitudinal extent of the respective associated Mithoraes 12 and 12a.
  • the number of grooves is formed corresponding to the number of entrainment bars 12 and 12a, respectively.
  • FIG. 1 illustrated embodiment represents only one way to reduce the acting on the drive shaft 4 breakaway torque can.
  • additional modules each formed from one or more stirring elements, are present, wherein the coupling of the individual module for common rotational movement to the drive shaft 4 takes place in successive steps.
  • FIG. 1 illustrated coupling via the driving rods 12 and 12a to understand only by way of example, so that there are other ways to make use of the inventive idea waiving the Mit lovedstäbe 12 and 12a use.
  • non-positive and / or positive connections are suitable for establishing a coupling between the stirring elements 3 to 3c and the drive shaft 4 in terms of time after the beginning of the rotational movement of the drive shaft 4.
  • first stirring elements 3 to 3c are rotatable relative to each other, wherein a coupling of the first stirring elements 3 to 3c with the drive shaft 4 takes place at least proportionally in successive steps.
  • FIG. 2 shows a schematic perspective view of the embodiment FIG. 1 with clarification of further details.
  • the grinding container 5 is in FIG. 2 not shown for reasons of clarity.
  • Conceivable are other embodiments in which the module 20 via alternative connections or in which the second stirring elements 6 to 6d individually with the drive shaft 4 continuously rotatably and without rotation brought into connection.
  • the second stirring elements 6 to 6d rotatably seated on the drive shaft 4.
  • driver rods 12 and 12a are in communication with the drive shaft 4 and the first stirring elements 3 to 3c form corresponding corresponding grooves. In the course of a rotational movement of the drive shaft 4, the driver rods 12 and 12a can then dip into the corresponding grooves of the stirring elements 3 to 3c.
  • the first stirring elements 3 to 3c are already coupled to the drive shaft 4, so that the projections 7 to 7c are oriented in alignment with the projections 9 to 9d.
  • the first stirring elements 3 to 3c can be moved about the longitudinal axis L relative to the drive shaft 4.
  • the second stirring elements 6 to 6d are non-rotatably connected to the drive shaft 4 in connection and thus can not be moved in rotation relative to the drive shaft 4.
  • the first stirring elements 3 to 3c are initially decoupled from the drive shaft 4 when the rotational movement of the drive shaft 4 begins.
  • the driver rods 12 and 12a again dive into their respective associated groove, resulting in a rotationally fixed coupling of the first stirring elements 3 to 3c with the drive shaft 4.
  • the rotationally fixed coupling is further temporally downstream of the incipient rotational movement of the drive shaft 4, so that the torque acting on the drive shaft 4 at the beginning of rotational movement of the drive shaft 4 with respect to a continuous non-rotatable connection of all stirring elements 3 to 3c and 6 to 6d with the drive shaft 4 is formed reduced ,
  • FIG. 3 shows a cross section through a further embodiment of a device according to the invention 1.
  • FIG. 3 clarifies FIG. 3 another way the first stirring elements 3 to 3c temporally after the beginning of rotational movement of the drive shaft 4 to couple with the drive shaft 4.
  • FIG. 3 Furthermore, a first stirring element 3 and a second stirring element 6. Next, the projections 9 of the second stirring element 6. Due to the cross-sectional position, the projections 7 and 7 to 7c of the first stirring element 3 in FIG. 3 not recognizable.
  • the drivers 13 and 13a are integrally formed and connected via a feather key 15 rotatably connected to the drive shaft 4. Further embodiments are conceivable in which a non-positive and / or positive connection for the rotationally fixed coupling of the drivers 13 and 13a is provided with the drive shaft 4.
  • the first stirring element 3 has two stops 17 and 17a, against which the drivers 13 and 13a are guided during rotational movement of the drive shaft 4. When the drivers 13 and 13a come into contact, the first stirring element 3 is coupled to the drive shaft 4 and, together with the drive shaft 4, is moved coaxially in rotation.
  • the first stirring element 3 has its own drivers 14 and 14 '. If the first stirring element 3 is moved in rotation by the drive shaft 4 by a coupling via the drivers 13 and 13a, the own drivers 14 and 14 'come into contact with at least one other of the stirring elements 3a to 3c in the course of the rotational movement of the first stirring element 3. from which a rotating movement of the or the respective further stirring elements 3a to 3c is initiated.
  • each of the stirring elements 3 to 3c, between which and the drive shaft 4 a rotational play is formed one or more own drivers 14 and 14 'are assigned, so that the rotating movement of all of the stirring elements 3 to 3c is initiated in succession. It is conceivable here that the drive shaft 4 performs a rotational movement by more than 360 ° until all of the stirring elements 3 to 3c coupled to the drive shaft 4 are in communication and are rotated via the drive shaft 4.
  • the drive shaft 4 stopped at the end of a grinding process and then be moved in rotation in the reverse direction of rotation.
  • the coupling between the stirring elements 3 to 3c is hereby temporarily released.
  • the breakaway torque of the drive shaft 4 is thus formed at the beginning of rotational movement in the reverse direction also reduced.
  • the coupling of the stirring elements 3 to 3c with the drive shaft 4 can be subsequently restored from the rotational movement in the reverse direction of rotation resulting and the incipient rotational movement of the drive shaft 4 in the reverse direction of rotation.
  • each of the first stirring elements 3 to 3c is assigned at least one driver 13 or 13a. It may also be that the drivers 13 and 13a are designed for the rotationally fixed coupling of all of the first stirring elements 3 to 3c with the drive shaft 4.
  • the drive shaft 4 may optionally have a high rotational frequency
  • embodiments have proven in which the drivers 13th or 13a and / or the stops 17 or 17a an elastic damping element (not shown) is assigned. If the respective first stirring element 3 to 3c is moved in rotation via the drive shaft 4, the drivers 13 or 13a and the respectively associated stop 17 or 17 may be interposed between the elastic damping element.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Accessories For Mixers (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Crushing And Grinding (AREA)
EP15000096.6A 2014-01-30 2015-01-15 Dispositif de broyage de matières solides ou des suspensions présentant des teneurs en matières solides et procédé de démarrage d'un processus de broyage d'un dispositif de broyage Active EP2902110B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014101165.1A DE102014101165A1 (de) 2014-01-30 2014-01-30 Vorrichtung zum zerkleinernden bearbeiten von feststoffen oder suspensionen mit feststoffanteilen und verfahren zum starten eines zerkleinerungsprozesses einer mahlvorrichtung

Publications (2)

Publication Number Publication Date
EP2902110A1 true EP2902110A1 (fr) 2015-08-05
EP2902110B1 EP2902110B1 (fr) 2017-03-29

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EP15000096.6A Active EP2902110B1 (fr) 2014-01-30 2015-01-15 Dispositif de broyage de matières solides ou des suspensions présentant des teneurs en matières solides et procédé de démarrage d'un processus de broyage d'un dispositif de broyage

Country Status (4)

Country Link
EP (1) EP2902110B1 (fr)
CN (1) CN104815728B (fr)
BR (1) BR102015001666B1 (fr)
DE (1) DE102014101165A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108499665A (zh) * 2018-04-09 2018-09-07 中际山河科技有限责任公司 一种研磨机
DE102022122868A1 (de) 2022-09-08 2024-03-14 Netzsch-Feinmahltechnik Gmbh Rührwerksmühle mit besonderen mitnehmern

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE589796C (de) * 1931-11-23 1933-12-14 Axel Larsen Mahlvorrichtung fuer trockenes oder nasses Mahlgut
DE1211905B (de) * 1964-02-26 1966-03-03 Draiswerke Ges Mit Beschraenkt Ruehrwerksmuehle zum Herstellen von Feststoffdispersionen
DE102010056287A1 (de) 2010-12-24 2012-06-28 Netzsch-Feinmahltechnik Gmbh Rührwerkskugelmühle mit Aktivrührwerk

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2631623C2 (de) * 1976-07-14 1985-06-13 Draiswerke Gmbh, 6800 Mannheim Rührwerksmühle
CN2587509Y (zh) * 2002-12-19 2003-11-26 中国地质科学院郑州矿产综合利用研究所 新型超细搅拌磨
NZ545960A (en) * 2006-03-15 2008-04-30 Environmental Decontamination Milling apparatus
DE102010053484A1 (de) * 2010-12-04 2012-06-06 Netzsch-Feinmahltechnik Gmbh Dynamisches Element für die Trenneinrichtung einer Rührwerkskugelmühle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE589796C (de) * 1931-11-23 1933-12-14 Axel Larsen Mahlvorrichtung fuer trockenes oder nasses Mahlgut
DE1211905B (de) * 1964-02-26 1966-03-03 Draiswerke Ges Mit Beschraenkt Ruehrwerksmuehle zum Herstellen von Feststoffdispersionen
DE102010056287A1 (de) 2010-12-24 2012-06-28 Netzsch-Feinmahltechnik Gmbh Rührwerkskugelmühle mit Aktivrührwerk

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CN104815728B (zh) 2017-06-06
EP2902110B1 (fr) 2017-03-29
DE102014101165A1 (de) 2015-07-30
CN104815728A (zh) 2015-08-05
BR102015001666B1 (pt) 2021-05-25
BR102015001666A2 (pt) 2016-03-08

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