EP1933984B1 - Kugelmühle mit detektion des betriebszustands - Google Patents

Kugelmühle mit detektion des betriebszustands Download PDF

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Publication number
EP1933984B1
EP1933984B1 EP06806054A EP06806054A EP1933984B1 EP 1933984 B1 EP1933984 B1 EP 1933984B1 EP 06806054 A EP06806054 A EP 06806054A EP 06806054 A EP06806054 A EP 06806054A EP 1933984 B1 EP1933984 B1 EP 1933984B1
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EP
European Patent Office
Prior art keywords
ball mill
grinding
receptacle means
control device
receptacle
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.)
Active
Application number
EP06806054A
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German (de)
English (en)
French (fr)
Other versions
EP1933984A1 (de
Inventor
Markus Bund
Wolfgang Mutter
Gerhard BÄR
Egbert Huwer
Hermann Michel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fritsch GmbH
Original Assignee
Fritsch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE202005015896U external-priority patent/DE202005015896U1/de
Priority claimed from DE200620006747 external-priority patent/DE202006006747U1/de
Application filed by Fritsch GmbH filed Critical Fritsch GmbH
Publication of EP1933984A1 publication Critical patent/EP1933984A1/de
Application granted granted Critical
Publication of EP1933984B1 publication Critical patent/EP1933984B1/de
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Classifications

    • 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
    • B02C17/04—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 with unperforated container
    • B02C17/08—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 with unperforated container with containers performing a planetary movement

Definitions

  • the invention relates to a ball mill, in particular a planetary or centrifugal ball mill on a laboratory scale, as this example, from the document DE-A-197 12005 is known.
  • centrifugal ball mills grinding bowls are arranged eccentrically to a drive axis and move on a circular path. The rotation of a grinding bowl around its own axis is prevented in centrifugal ball mills.
  • planetary ball mills are based on producing a combined orbital and rotary motion for grinding bowls. As a result of the rotation of the grinding bowls, a centrifugal force directed radially outwards is exerted on the grinding stock.
  • the drive of the grinding bowl in a planetary ball mill causes an absolute rotational movement of the grinding bowl about its own axis, the planetary axis, so that in a planetary ball mill compared to a centrifugal ball mill a significantly larger, further centrifugal component is generated. This is superimposed on the centrifugal component, which is generated by the circulation of the grinding bowls about the center axis. Finally, the Coriolis effect is also effective. These three forces result in the planetary ball mill a resulting force field to which the grinding balls and the ground material are exposed.
  • the different forces due to the rotational movements of various components of a centrifugal ball mill or planetary ball mill must be coordinated with each other for safe use of the ball mill.
  • the grinding vessel must be kept in a defined, predetermined position relative to the axes of rotation.
  • the grinding jar is not in the correct position, even if it seems to be properly inserted into the receiving device for the operator. This case can already occur, for example, by a slight tilting or a not quite complete insertion of the grinding vessel.
  • insufficient attachment of the grinding vessel in the receiving device may result in that the grinding vessel in the receiving device, in particular during operation of the mill, is held in a position which is not the correct position for the grinding vessel. Then imbalances can occur as a result of incorrect positioning of a grinding vessel. When operating the ball mill with an incorrectly positioned grinding vessel then there is the danger that the ball mill, in particular the grinding tools and / or the storage of the receiving device is damaged.
  • the ball mill should in particular only be able to be operated when the grinding jars are correctly inserted into the respective receiving device.
  • the invention provides a ball mill, in particular a planetary or centrifugal ball mill on a laboratory scale with a housing, a support device, the is rotatably mounted on the housing about a center axis, at least one receiving device for at least one grinding vessel which is rotatably supported about a receiving axis to the carrier device and is carried by this about the center axis, a drive for the carrier device, a drive for the receiving device at least one with grinding balls refillable grinding vessel comprising a grinding bowl and a lid for releasably closing the grinding bowl, wherein the grinding bowl is held in the receiving device when it is inserted into the receiving device, wherein by the complete insertion of the grinding vessel in the receiving device, an operating state is defined, in which the mill can be operated as intended with a grinding device rotating about the center axis and a grinding vessel rotating about the receiving axis in the receiving device, and with a detection device for identifying the operating state the detection device comprises a trigger, which assumes a release state in response to the
  • the invention relates in particular to mills on a laboratory scale. This means that the outer dimensions of the support device for the diameter in the range between 10 cm and 2 m and for the height in the range between 4 cm and 1 m move. Volumes for the grinding bowls can be in the range between 5 ml and 2 l, in particular between 12 ml and 1 l, in particular up to 500 ml.
  • the receiving device is preferably arranged in the carrier device, which is closed at the top by the cover, substantially sunk.
  • the grinding jar is positioned over the receiving device in the carrier device. That is, the grinding vessel is preferably arranged in the carrier device substantially sunk.
  • the support device with the receiving device sunk therein and the milling vessel also recessed in the carrier device is designed pot-shaped according to the invention.
  • the invention thus provides a ball mill, in which the grinding jars can be arranged in a carrier device such that a total of a flat, even disc-shaped body rotates about the center axis.
  • the bottom plate is rigidly connected to the cover plate.
  • the Carrier device may also have a jacket element, in particular an annular jacket element.
  • the jacket element can rigidly connect the bottom plate to the upper cover plate.
  • the detection device is preferably mounted outside the carrier device outside the range of movable parts, so that the movement of the rotating parts can not falsify the detection of the grinding vessel in the receiving device.
  • the control device can be arranged below the carrier device.
  • the ball mill according to the invention for this purpose has a spaced from the bottom plate to form a gap adjacent housing portion, wherein the release position of the trigger is located in the intermediate space and the control device is attached to the housing portion.
  • the trigger is movably mounted and is dependent on the insertion of the grinding vessel in the receiving device positioned.
  • the trigger assumes a release position corresponding to the release position when the grinding vessel is fully inserted into the receiving device.
  • the position of the trigger is therefore reliably coupled in a simple manner with the position of the grinding vessel in the receiving device.
  • the receiving device comprises in a preferred embodiment of the invention at least one movably mounted display pin, which indicates the position of the grinding vessel in the receiving device.
  • the indicator pin assumes a first position when the grinding jar is not fully inserted in the receiving device. If the grinding jar is then completely inserted into the receiving device, the display pin assumes a second position, which corresponds to the release state of the grinding jar in the receiving device.
  • the display pin is mounted coaxially to the receiving axis.
  • the indicator pin is at a constant radial distance from the center axis.
  • the indicator pin therefore passes through the same radial path around the center axis at each gear ratio. On this radial path can thus be advantageously selected a position from which the position of the display pin is read to control the state of the grinding vessel in the receiving device.
  • the ball mill comprises an ejector for ejecting the grinding vessel from the receiving device.
  • the ejector is used as a display pin.
  • the ejector takes a first position until the grinding vessel comes into contact with the ejector when inserted into the receiving device. After the grinding vessel has come into contact with the ejector in its first position, the ejector is moved during further insertion with the grinding vessel with. The ejector assumes a second position when the grinding jar is fully inserted into the receiving device. The second position corresponds to the release state of the grinding vessel in the receiving device.
  • an ejector is advantageous to remove the grinding vessel from the receiving device can.
  • the ejector can perform a dual function of ejecting the grinding vessel and indicating the position of the grinding vessel in the receiving device so that the position of the grinding vessel is external is detectable. This can advantageously be saved additional components.
  • a preferred embodiment of the detection device according to the invention is that the trigger and the control device form a non-contact switch, which is reliable, although a part of the switch with the rotating support device is moved and the other part is stationary, since the switch without mechanical contact can close both parts.
  • control device according to the invention thereby has a low susceptibility to wear and dirt.
  • the non-contact switch can be designed in particular as a magnetic switch.
  • the trigger comprises at least one magnet and the control device comprises at least one Hall sensor.
  • the Hall sensor has a spatial sensitivity range in its environment in which it responds to the magnet.
  • the release position of the trigger is defined in the sensitivity range of the Hall sensor, so that the release state is detected by the introduction of the magnet in the sensitivity range of the Hall sensor.
  • the display pin in particular acting as a display pin ejector carries the magnet.
  • the arrangement of magnet as a trigger and control device with Hall sensor is advantageously particularly insensitive to other components or dirt in the sensitivity range of the Hall sensor and therefore particularly robust.
  • a further detection device can be realized in a simple manner in that the trigger is a light barrier and the control device, a transmitter which emits light during operation, and a receiver which receives the light emitted by the transmitter, so that between the transmitter and receiver, a light barrier arises, includes.
  • the release position of the trigger is defined between transmitter and receiver in the field of the light barrier, so that the release state is detected by the interruption of the light barrier by the trigger in its release position.
  • the display pin in particular, acting as a display pin ejector of the photoelectric interrupter.
  • control device has a signaling device for generating and / or emitting a particular digital signal of the control device in response to detecting the release state.
  • the signaling device makes it possible to pass on the information about the state of the grinding vessel used in the receiving device for use in the operation of the mill.
  • the ball mill according to the invention comprises in an advantageous development of a control device for controlling at least the drive of the support device in response to the signal of the control device.
  • the control device receives a signal from the signaling device, from which it detects whether the grinding vessel is completely inserted into the receiving device.
  • the control device cooperates with the drive of at least the carrier device such that the mill is only driven with the power intended for grinding when the grinding vessel assumes its target position in the receiving device.
  • the invention can advantageously be used for ball mills with any number of receiving devices or grinding jars.
  • the mill can have a plurality of receiving devices, in particular arranged at the same angular distance between the individual receiving devices.
  • the mill according to the invention may comprise at least two receiving devices.
  • the recording devices can each other in a straight Number of receiving devices, for example, be arranged diametrically opposite in the carrier device.
  • Three receiving devices can be arranged, for example offset by 120 ° to each other.
  • the invention also relates to a mill with a receiving device and a counterweight, as described for example in the patent DE 197 12 905 C2 the applicant is described.
  • the ball mill has at least two receiving devices and with the carrier device co-rotating coding means for each of the receiving devices.
  • the coding means make it possible to identify each of the recording devices.
  • the ball mill with the plurality of receiving devices comprises a fixed decoding device with decoding means corresponding to the coding means. With the decoding device, the recording devices are detected in each case for themselves. Thus, a distinction can be made between the at least two grinding vessels and thus the position of each grinding vessel in its receiving device can be interrogated individually. The information on whether each of the grinding jars is fully inserted into its receiving device, is forwarded to the control device.
  • the invention provides that the coding means each comprise at least one magnet which is in a unique position with respect to the Recording device is mounted, and the decoding device has at least two Hall sensors as decoding means. A first of the at least two Hall sensors is positioned corresponding to the magnet of one of the recording devices and a second of the at least two Hall sensors is positioned corresponding to the magnet of another recording device.
  • the ball mill according to the invention can be operated with a drive power of 0.2 kW to 20 kW.
  • the rotational speed for the rotation of the carrier about the center axis may be as high as 3000 1 / min at input speeds ranging from 50 1 / min to 100 1 / min. Values of up to 6000 rpm can be selected relative to the carrier device for the rotational speed of the receiving device during its rotation about the receiving axis.
  • FIG. 1 In the representation of the ball mill according to the invention in FIG. 1 is an eruption of a housing 8 to see on which the support device 1 is rotatably mounted about a center axis 15.
  • the ball mill further has a drive 17 for the carrier device.
  • a motor drives a V-belt, which meshes with the bottom disk 6 of the carrier device 1.
  • the ball mill has a drive 27 for receiving devices 2, via which the receiving devices can be set in rotation around the receiving axes 25.
  • a toothed belt via appropriately sized pinion transmits the rotation of the carrier device on the receiving devices 2, wherein an over- or reduction can take place.
  • in the context of the invention in principle also the possibility of reversing the direction of rotation.
  • the carrier device 1 further comprises a cover plate 4 and a jacket element which closes the carrier device 1 laterally outwards.
  • the cover is a solid plate, which has a thickness of about 20 mm and is made of metal.
  • the heavy round cover fulfills next to the upper end of the support device and the function of a flywheel, which absorbs deviations of each given at a time value for the torque of the average torque, which is determined by integrating the total torque over a circuit, so that the Nonuniformity of the rotational movement remains as low as possible.
  • the housing 8 In the sectional view according to FIG. 2 the housing 8, the jacket element and the motor with the drive for the V-belt are not shown.
  • the otherwise massive cover 4 has openings through which receiving devices 2 are sunk into the interior of the support device 1 in.
  • the grinding vessel 5 is also sunk through such openings in the cover 4 into the interior of the support device 1, wherein the grinding vessel 5 is inserted into the receiving device 2.
  • each grinding vessel 5 has reached the lowest possible position in its receiving device 2 by lowering the grinding vessel into the receiving device. This is his target position.
  • the target position of the grinding vessel 5 corresponds to the operating state of the ball mill. In operation, the grinding jars are properly inserted into the receiving devices and the ball mill can be operated as intended, in operation, the carrier device 1 about the center axis 15 and the receiving devices 2 with the grinding jars 5 each rotate about a receiving axis 25.
  • the ball mill has a detection device, which allows to determine whether or when a grinding jar 5 assumes its target position in the receiving device 2.
  • Each receiving device 2 comprises a display pin 28, which is mounted with respect to the receiving axis 25 coaxial with the receiving device 2 and the grinding vessel 5.
  • the indicator pin 28 is in contact with the grinding jar 5 in the receiving device 2.
  • the axial position of the indicating pin 28 with respect to the receiving axis 25 is variable depending on the position of the grinding jar 5 in the receiving device 2 with respect to the receiving axis 25. That is Grinding jar 5 completely inserted into the receiving device 2, the display pin 28 assumes a defined lowest position.
  • the indicator pin 28 carries a magnet 310, which acts as a trigger for the detection device.
  • the magnet 310 is brought to a release position when the indicator pin 28 assumes its lowest position.
  • the magnet 310 is in its release position, this can be detected, so that the detection of the release position takes place and the operation of the mill can be triggered.
  • a first revolution of the carrier device is performed around the center axis at a low speed compared to the operating speed at the start of the ball mill. In this initialization run is checked for the recording device, whether the grinding vessel is positioned correctly.
  • the detection device further comprises a control device 320.
  • the control device 320 is attached to a housing region 82, which is spaced from the bottom plate 6 by a gap 86.
  • the Control device 320 has a sensitivity range, wherein the control device detects the trigger 310 in the initialization run in its release position as soon as the trigger 310 is in the sensitivity range of the control device 320.
  • the distance between control device 320 and trigger 310 is at most 2 cm, so that the ball mill with detection device has a very compact design.
  • the distance between controller 320 and trigger 310 may vary depending on the embodiment of the detection device. For example, if magnets and Hall sensors are used, the distance is determined by the field strength. The distance between control device 320 and trigger 310 may then be, for example, less than 5 mm, in particular 2 mm.
  • the indicator pin 28 carries a trigger 310 for the detection device 300.
  • the trigger is located in the sensitivity range 322 of the control device 320.
  • the illustration is intended to illustrate the operation and is not reproduced to scale.
  • the control device 320 includes in the embodiment shown a Hall sensor, the trigger is a magnet.
  • the control device could also have a light barrier, which defines a sensitivity range of the control device 320.
  • the display pin itself may be the trigger, which is arranged so that it interrupts the light barrier as soon as the grinding jar 5 reaches its target position in the receiving device 2 and so that the display pin 28 has brought into the lowest possible position relative to the receiving device 2.
  • a detection device with light barrier and breaker is easy to implement, but also prone to contamination in the sensitivity range.
  • a detection device with Hall sensor and magnet offers the advantage of being dirt-resistant.
  • the control device here the Hall sensor 320, detects the trigger, in this case the magnet 310, when it is located in the spatial sensitivity region 322 of the control device and thus assumes its release position.
  • the Hall sensor 320 cooperates with a signaling device 325, which generates a digital signal, in particular during the initialization run in response to the position of the magnet 310. If the magnet 310 in the sensitivity range 322 of the Hall sensor 320 assumes the release position of the trigger, a signal "YES" is generated. As long as the trigger does not assume the release position, a signal "NO" is generated.
  • connections shown in the figures for the signal transmission between the control device 320, the signaling device 325, the control device 150 and the drive 17 may be wired or wireless connections.
  • the control device 320 cooperates with a control device 150, which controls at least the drive 17 of the carrier device 1 in response to the signal.
  • the ball mill is only with the Power driven when the control device receives the signal "YES" from the signaling device 325, that is, when the control device 320 has detected the release state of the trigger 310, the grinding vessel 5 is thus fully inserted into the receiving device 2. The ball mill is thus driven only in its operating state with the operating speed.
  • FIG. 4 the insertion of the grinding vessel 5 into the receiving device 2 and the associated positioning of the trigger 310 is shown in greater detail.
  • FIGS. 4A, 4B and 4C show FIG. 2 Corresponding representations of the receiving device 2 in different stages of the insertion of the grinding bowl 5 in the receiving device 2. The illustration serves to illustrate the operation in particular the sensitivity range, this is therefore reproduced enlarged.
  • the grinding bowl 5 is inserted into the receiving device 2 and rotated about its longitudinal axis until guide means, here formed as grooves on the grinding vessel 5 and set screws on the receiving device 2, "find each other, so that upon further lowering of the grinding vessel 5 in the receiving device 2 the Grinding vessel 5 is moved substantially exclusively vertically downwards.
  • guide means here formed as grooves on the grinding vessel 5 and set screws on the receiving device 2
  • the receiving device 2 comprises a display pin 28, which carries at its lower end a magnet as a trigger 310 for the detection device.
  • the indicator pin 28 is held in an opening in the receiving device so that its upper end in Course of insertion with the bottom of the grinding vessel 5 comes into contact. After the upper end of the indicator pin 28 has come into contact with the bottom of the grinding jar 5, the display pin 28 is moved in accordance with the progressive lowering of the grinding jar 5 corresponding to lowering of the grinding jar 5 in the receiving device 2, until finally its lower end with the Magnet as a trigger 310 emerges from the receiving device.
  • the movement of the trigger 310 allows the opening and closing of a contact, which in the example shown here is the contact of a non-contact switch in the form of a magnetic switch.
  • the movement of the trigger 310 is coupled to the movement of the indicator pin 28.
  • the movement of the indicating pin 28 is in turn coupled to the movement of the grinding jar 5 in the receiving device.
  • the indicator pin 28 mediates the movement of the grinding vessel to the detection device.
  • the coupling of the movements is set in the example shown so that the lowest possible position of the shutter closes the contact of the switch.
  • the reverse version is also possible after which a switch is opened in the lowest possible position of the release.
  • the trigger 310 enters the sensitivity range 322 of the control device 320 (in FIG FIG. 4 not shown) and thereby closes the contact of the switch formed by the control device 320 and the trigger 310 of the detection device.
  • FIGS. 4A, 4B and 4C The movement of the grinding vessel 5 in the receiving device 2 with progressive insertion is in the FIGS. 4A, 4B and 4C emphasized by the block arrows A and B, wherein the arrow A, the increasing lowering of the grinding vessel compared to the beginning of insertion ( FIG. 4A ) when reaching an intermediate position ( FIG. 4B ) and the arrow B the entire lowering until reaching the target position ( FIG. 4C ) of the grinding vessel illustrated.
  • FIG. 4B the arrangement is shown in a setting with open locking means. Due to the weight of the grinding vessel 5, this lowers compared to the in FIG. 4A shown position further into the receiving device 2 (see arrow A). The grinding jar 5 may then first descend so far down until its bottom is seated on the display pin 28. In this intermediate position, the grinding vessel 5 sits on the display pin 28, without its rest position (see FIG. 4A ) to change significantly.
  • the operator By depressing the grinding vessel 5, the operator can now lower the grinding vessel 5 further in the receiving device 2. For this purpose, the operator can exert pressure on the grinding vessel 5 and thus move it further down into the receiving device 2.
  • FIG. 4C the target position of the grinding vessel 5 is shown in the receiving device 2.
  • the grinding vessel In its target position, the grinding vessel is locked by the locking means in the receiving device.
  • the display pin 28 is opposite to in the FIGS. 4A and 4B shown, not fully inserted position of the grinding vessel 5 further drove all the way down (see arrow B).
  • the magnet as a trigger 310 for the detection device 300 enters the sensitivity range 322 of the Hall sensor as a control device 320, so that a resistance change is generated, which is detected as closing of the magnetic switch. In this way, the detection device recognizes, in particular in the initialization run, the assumption of the target position of the grinding vessel 5 when it is completely inserted into the receiving device 2.
  • the display pin 28 exercises in the in the FIGS. 4A to 4C illustrated embodiment of the invention at the same time the function of an ejector for the grinding vessel 5 from.
  • a spring which is relaxed without the grinding jar used and the display pin as the ejector 28 axially biased when the grinding jar 5 is inserted into the receiving device 2.
  • the indicator pin comprises as ejector a re-entrant shoulder against which an end of the spring 280 rests.
  • the other end of the spring 280 is supported against the receiving device.
  • the receiving device 2 is relative to the axial movement of the indicator pin 28 and the grinding vessel 5 fixed.
  • the spring 280 is tensioned in the release state when the grinding vessel 5 is fully inserted into the receiving device 2 and pushes the ejector 28 down with its bottom.
  • the prestressed spring relaxes so that the indicator pin 28 is moved upwards. Since the indicator pin 28 is in contact with it via the bottom of the grinding jar 5, it guides the grinding jar 5 in the receiving device 2 upwards from its target position when it moves upwards due to the relaxing spring. As a result, the insertion of the grinding vessel 5 is reversed; the display pin 28 driven by the relaxing spring acts as an ejector and ejects the grinding jar out of the receiving device.
  • the term "ejection” in this context means to bring the grinding vessel into a position that allows the user to remove the grinding vessel from the receiving device.
  • the trigger in the "ejected" position, the trigger is not within the sensitivity range of the controller.
  • the spring 280 pushes the grinding jar 5 out of the receiving device 2.
  • this functionality can also be used for ball mills with previous design.
  • grinding jars are fixed non-positively by bracing by means of spindle systems.
  • a spring is used with a corresponding to the necessary clamping pressure spring constant.
  • This can be realized with correspondingly strong springs, for example disc springs.
  • the ejector is to match, for example, plate-shaped, formed.
  • the necessary clamping pressure is the pressure at which the grinding jar is held securely in the receiving device during operation of the ball mill.
  • the grinding jar is then locked in the receiving device, it is ensured that at least the necessary clamping pressure is applied. As long as this is not applied, the grinding vessel can not be used against the resistance of the spring. However, as soon as the grinding jar is positively clamped and completely inserted, it can be ensured that the grinding jar is held with sufficient force when the detection device recognizes the grinding jar as being correctly inserted.
  • the ball mill can have several, for example, two receiving devices. Then it must be ensured that in each of the receiving devices, the respective grinding vessel 5 is fully inserted. The ball mill reaches its operating state only when all grinding jars have reached their target positions in the relevant recording devices.
  • a first revolution of the carrier device about the center axis is performed at a low speed compared to the operating speed.
  • each cradle is identified. If the ball mill comprises, for example, two pick-up devices, they will have one Decoding device identifies both recording devices in the initialization round.
  • co-rotating coding means for the respective recording device and a fixed decoding device are provided with the carrier device 1. With the decoding device, the coding means are detected and the information contained is read out.
  • FIG. 5 a corresponding embodiment is shown schematically.
  • the ball mill has a carrier device 1.
  • a first receiving device 201 rotates about the center axis 15 with the carrier device 1.
  • first coding means 211 are mounted adjacent to the first receiving device 201.
  • the coding means 211 are in this example designed as a magnet arrangement with a plurality of magnets, which are arranged in particular at different radii. In the embodiment shown, two magnets are provided for this purpose.
  • the ball mill comprises a decoding device 210, which cooperates with the control device 150.
  • a decoding device 210 which cooperates with the control device 150.
  • FIG. 5 the connection between the decoder 210 and the controller 150 is shown.
  • the connections between the further devices and the control device 150 are not shown in these figures.
  • the decoding device 210 is arranged stationarily in the ball mill, for example under the carrier disk.
  • the decoding device 210 has decoding means 220.
  • the decoding means 220 are designed in particular as a Hall sensor arrangement, which corresponds to the magnet arrangement. In the embodiment shown, three Hall sensors are provided, which are arranged on different radii corresponding to the magnets.
  • the magnets are respectively detected by means of the associated Hall sensor. From the signals of the corresponding Hall sensors, the first recording device 201 is detected.
  • FIGS. 6A and 6B a carrier device 1 with two receiving devices 201, 202 is shown.
  • FIG. 6A shows the carrier device 1 in a first position.
  • the carrier device 1 in a second position, which is shifted from the first position by half a revolution of the carrier device.
  • a first receiving device 201 and a second receiving device 202 rotate about the center axis 15 with the carrier device 1.
  • Markings 11 for the rotational position of the carrier device are attached to the carrier device 1 at a constant radial distance from the center axis 15.
  • the markers 11 are magnets in the example shown.
  • the distance between adjacent magnets 11 is constant for all markings.
  • the magnets 11 detected sequentially. These detection events are counted and summed up. When the total number of magnets 11 has been detected, one revolution is completed.
  • first coding means 211 are attached to the carrier device 1 adjacent to the first receiving device 201. Adjacent to the second receiving device 202, second coding means 212 are attached to the carrier device 1.
  • the first and second coding means are in this example designed as a magnet arrangement with two magnets 211, 212 each, which are arranged at different radii.
  • the ball mill includes a decoder 210 (not shown) having Hall sensors 220 as decoding means.
  • a holder 221 for the decoding means 220 is shown.
  • the holder 221 is formed as a plate having two openings which serve to attach the holder 221 in the ball mill.
  • On the plate three Hall sensors 220 are arranged.
  • visible side of the bracket 221 is in their - in the FIGS. 6A and 6B shown - installed state of the carrier device 1 facing.
  • the arrangement of the Hall sensors 220 corresponds to the arrangement of the magnets 211, 212.
  • Three Hall sensors 220 are arranged on a holder 221 for the decoding means.
  • the bracket 221 is in the FIGS. 6A and 6B shown partially broken away, so that the positioning of the Hall sensors 220 is shown in the phase in which they are connected to the magnets 212 (FIG. FIG. 6A ) or 211 ( FIG. 6B ) can work together to the second receiving device 202 (FIG. FIG. 6A ) or the first receiving device 201 (FIG. FIG. 6B ) to identify.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP06806054A 2005-10-07 2006-10-05 Kugelmühle mit detektion des betriebszustands Active EP1933984B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE202005015896U DE202005015896U1 (de) 2005-10-07 2005-10-07 Kugelmühle mit Rastmittel
DE200620006747 DE202006006747U1 (de) 2006-04-24 2006-04-24 Kugelmühle mit Detektion des Betriebszustands
PCT/EP2006/009642 WO2007042202A1 (de) 2005-10-07 2006-10-05 Kugelmühle mit detektion des betriebszustands

Publications (2)

Publication Number Publication Date
EP1933984A1 EP1933984A1 (de) 2008-06-25
EP1933984B1 true EP1933984B1 (de) 2009-12-16

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EP06806054A Active EP1933984B1 (de) 2005-10-07 2006-10-05 Kugelmühle mit detektion des betriebszustands

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EP (1) EP1933984B1 (enrdf_load_stackoverflow)
DE (1) DE502006005686D1 (enrdf_load_stackoverflow)
WO (1) WO2007042202A1 (enrdf_load_stackoverflow)

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ITRM20070364A1 (it) * 2007-06-27 2008-12-28 Assing S P A Nuovo mulino industriale ad attrito per produrre nanomateriali attraverso processi meccanochimici
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