EP2018958A2 - Cooling system for a rotary tablet press - Google Patents

Cooling system for a rotary tablet press Download PDF

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Publication number
EP2018958A2
EP2018958A2 EP08012570A EP08012570A EP2018958A2 EP 2018958 A2 EP2018958 A2 EP 2018958A2 EP 08012570 A EP08012570 A EP 08012570A EP 08012570 A EP08012570 A EP 08012570A EP 2018958 A2 EP2018958 A2 EP 2018958A2
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EP
European Patent Office
Prior art keywords
housing
cooling system
rotor
cooling
heat exchanger
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Granted
Application number
EP08012570A
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German (de)
French (fr)
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EP2018958A3 (en
EP2018958B1 (en
Inventor
Harald Römer
Ingo Schmidt
Werner Seifert
Peter Lüneburg
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Fette GmbH
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Fette GmbH
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Application filed by Fette GmbH filed Critical Fette GmbH
Publication of EP2018958A2 publication Critical patent/EP2018958A2/en
Publication of EP2018958A3 publication Critical patent/EP2018958A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/08—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with moulds carried by a turntable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/34—Heating or cooling presses or parts thereof

Definitions

  • the invention relates to a cooling system for a rotary tablet press according to the preamble of patent claim 1.
  • a plant for the production of tablets include in addition to the usual rotary press other parts and peripheral aggregates.
  • the essential electrical and electronic components and components for the control and regulation of the main drive of the press and the servo drives in the press are combined in a control cabinet, which is usually connected via a cable to the tablet press.
  • the electrical components in particular the power units and the machine computer, heat up during operation, and it is necessary to provide sufficient cooling to limit the heating.
  • the heating of these parts heated naturally also the operating range of the entire system, and the lower the loss of heat is kept in the cabinet and the more effective the heat dissipation from the cabinet, the higher the ambient temperature can be. The availability of the entire system therefore increases with the control of the heat loss.
  • a cabinet for a tablet press which is attached to the lower part of a press housing.
  • a ventilation channel On the outside of the closed cabinet housing a ventilation channel is arranged, the inner wall of a Wall portion of the housing is formed.
  • the ventilation duct is assigned a fan which conveys outside air via at least one inlet opening into the ventilation duct, wherein the air escapes via at least one outlet opening.
  • a second fan is arranged, which circulates the air inside the housing, so that it at least partially along the inside of the housing wall sweeps along, which limits the ventilation duct.
  • the invention has for its object to provide a cooling system for a rotary tablet press, which is also near the rotor attached electric drive motor allows effective cooling.
  • a chiller is arranged within the housing, the evaporator is part of a first heat exchanger, the other part is arranged in a cooling circuit for the drive motor.
  • a fan is arranged, which sucks in cooling air via an air inlet opening in the housing and emits via an air outlet opening in the housing, wherein the cooling air is in heat exchange with the condenser of the refrigerator.
  • the heat from the drive motor can be effectively removed so that it does not come to an undesirable heating of the die plate.
  • the invention enables cooling with means which are arranged inside the housing. Externally mounted fans or flanged cooling units are not required.
  • water is provided as the coolant in the cooling circuit.
  • the suction opening in the bottom and the air outlet opening in the ceiling of the housing arranged. These openings are preferably close to a side wall of the housing.
  • the cooling system according to the invention is particularly advantageous in the case of a drive motor integrated in the rotor, the rotor being connected in a rotationally fixed manner to the rotor and the stator lying in the interior of the rotor.
  • the coolant lines can then be easily connected to the cooling system in the stator of the electric motor.
  • the condenser of the refrigerator is cooled in the cooling system according to the invention with room air. Therefore, an embodiment of the invention provides that the condenser / heat exchanger in the upper region of the housing and the fan is arranged upstream of the condenser / heat exchanger.
  • the refrigerator is arranged in a relatively elongated arrangement near a side wall of the housing and thus accommodated to save space.
  • the channel regions which are traversed by room air, according to a further embodiment of the invention preferably have a so-called nano-coating. This prevents settling of impurities on the channel walls, so that expensive cleaning arrangements or the like can be omitted.
  • a second heat exchanger is arranged in the housing, through which the coolant flows, and a second fan generates a cooling air flow via the heat exchanger, which is directed into the housing, for example, in order to sufficiently cool the housing atmosphere and thus parts of the tablet press. It is also conceivable to install the second heat exchanger on the wall of a control cabinet outside the press housing, wherein the coolant lines must of course also be led to the outside.
  • control cabinet is also arranged below the rotor in the housing. Since, according to the invention, the drive motor is arranged close to below the rotor or in the rotor itself, there is sufficient space for the placement of the control cabinet at the lower end of the housing. Since the control cabinet or the parts taken up by it are also to be cooled, according to one embodiment of the invention, the interior of the cabinet flows through the cooling air flow of the second fan.
  • the rotor with the drive can be arranged within a process housing which is closed relative to the housing, into which coolant lines are led into or out of the latter.
  • a temperature control device associated with the chiller which is connected to a temperature sensor in or on the rotor and / or a sensor in the housing.
  • the cooling system is integrated into the tablet press and does not require any outdoor units or fans mounted on the outside of the case, flanged units or the like. The vents, when attached to the bottom and top of the enclosure, remain invisible.
  • a heating of the die plate is prevented, wherein the temperature ranges can be adjusted via the user interface on a control computer.
  • the cooling air for the chiller is separated from the air within the housing.
  • the cooling of the drive motor and thus also the cooling of the die plate on the one hand and the process space on the other hand takes place with the coolant of the same circuit.
  • the temperature of the coolant can, as mentioned, be preselected by controlling the chiller.
  • the heat is released via a heat exchanger to the ambient air.
  • An advantage of the cooling system according to the invention is that the waste heat is compressed ready for removal and is at a low Entropiemul. Since additional devices are eliminated, no additional connecting cables are needed, so that the space requirement is minimal. Nevertheless, it is possible to maintain and clean the parts of the cooling system according to the invention via maintenance openings in the housing.
  • Fig. 1 is a cuboid housing 10 indicated for a rotary tablet press. It stands on feet 12 and thus slightly above the ground.
  • a rotor 14 is indicated with die plate 16 of a rotary press, not shown, which is mounted in a suitable machine frame (not shown). Parts of the rotor are above a process housing 18 below and above over which einhaust the process space of the press, so that production dust does not escape to the outside. It is understood that up and down a corresponding seal is provided.
  • the drive motor is integrated in the rotor 14 as shown in FIG DE 10 2004 040 163 A1 is disclosed.
  • the stator of the motor is also up and down beyond the process housing 18.
  • a control cabinet 20 which contains all the electronic and electrical components including a machine computer for the operation of the Doppelrundsleyrpresse. These parts are known per se and should therefore not be further enumerated.
  • a chiller In an elongated, extending from the bottom to the ceiling of the housing 10 housing 22, a chiller is housed. It has an evaporator 24, a compressor 26, a condenser 28 and a throttle 30. These are the usual parts of a compression refrigeration cycle, as is well known.
  • the evaporator 24 is part of a heat exchanger, the other part 34 forms part of a cooling circuit.
  • the cooling circuit is composed of a cooling system of the stator of the motor, not shown, which communicates via lines 36 and 38 with the heat exchanger part 34 and another heat exchanger 40 in connection.
  • the heat exchanger 40 is mounted on the outer wall of the cabinet 20 with a fan 42 associated therewith.
  • Another fan 44 is located in the housing 22, which sucks air via a lower intake opening 48 via a channel 46.
  • the channel 46 is formed between the housing 22 and the associated housing wall.
  • the air flow 50 sucked in by the fan 44 passes via the condenser 28 of the chiller to an upper exhaust air opening 52. The cooling of the condenser 28 thus takes place through room air.
  • the cooling of the drive motor (not shown) and the die plate 16 is carried out with a coolant in the described cooling circuit, which is preferably water.
  • the coolant flows through the heat exchanger 40, optionally assisted by a pump, and the fan 42 generates an air flow 56 within the housing 10, which is also cooled by the heat exchanger 40 and thus cools the atmosphere in the housing 10 and thus the process housing 18.
  • Fig. 2 In the block diagram after Fig. 2 are those parts already in Fig. 1 are shown, provided with the same reference numerals. Also shown are drive motors 60, 62 and 64 for the compressor 26 and the fans 44 and 42. They are controlled by a control device 66 which communicates with sensors 68 and 70.
  • the sensor 68 measures the temperature in the region of the die plate 16 or within the rotor 14.
  • the sensor 70 measures the temperature within the housing 10 or the process housing 18.
  • the control device 66 is in communication with an operating computer, not shown, for example via a radio link. In a suitable manner, a desired value for the temperature of the die plate or in the housings 10 or 18 is predetermined in the control device 66. By a suitable control of the chiller and the fan 42, 44 is ensured that the set temperature is reached and maintained.

Abstract

The system has a rotor powered by an electrical driving motor. A refrigerator is arranged within a closed housing (10), where an evaporator (24) of the refrigerator forms a part of a heat exchanger. Another heat exchanger part (34) is arranged in a coolant circuit of the motor. A fan (44) is arranged in the housing in a channel (22) opposite to an inner housing. Cool air is absorbed by an air inlet opening (48) and delivered by an air outlet opening (52) of the housing. The cool air stays in heat exchanged with a condenser (28) of the refrigerator.

Description

Die Erfindung bezieht sich auf ein Kühlsystem für eine Rundläufertablettenpresse nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a cooling system for a rotary tablet press according to the preamble of patent claim 1.

Zu einer Anlage zur Herstellung von Tabletten gehören neben der üblichen Rundläuferpresse weitere Teile und periphere Aggregate. Die wesentlichen elektrischen und elektronischen Komponenten und Bauteile für die Steuerung und Regelung des Hauptantriebs der Presse und der Servoantriebe in der Presse sind in einem Schaltschrank zusammengefaßt, der zumeist über ein Kabel mit der Tablettenpresse verbunden ist.To a plant for the production of tablets include in addition to the usual rotary press other parts and peripheral aggregates. The essential electrical and electronic components and components for the control and regulation of the main drive of the press and the servo drives in the press are combined in a control cabinet, which is usually connected via a cable to the tablet press.

Die elektrischen Komponenten, insbesondere die Leistungseinheiten und der Maschinenrechner erwärmen sich im Betrieb, und es ist erforderlich, für eine ausreichende Kühlung zu sorgen, um die Erwärmung zu begrenzen. Die Erwärmung dieser Teile erwärmt naturgemäß auch den Betriebsbereich der Gesamtanlage, und je geringer die Verlustwärme im Schaltschrank gehalten wird und je effektiver die Wärmeableitung aus dem Schaltschrank erfolgt, um so höher kann die Umgebungstemperatur sein. Die Verfügbarkeit der Gesamtanlage steigt daher mit der Beherrschung der Verlustwärme.The electrical components, in particular the power units and the machine computer, heat up during operation, and it is necessary to provide sufficient cooling to limit the heating. The heating of these parts heated naturally also the operating range of the entire system, and the lower the loss of heat is kept in the cabinet and the more effective the heat dissipation from the cabinet, the higher the ambient temperature can be. The availability of the entire system therefore increases with the control of the heat loss.

Aus DE 103 21 022 B4 ist ein Schaltschrank für eine Tablettenpresse bekannt geworden, der an dem unteren Teil eines Pressengehäuses angebracht ist. An der Außenseite des geschlossenen Schaltschrankgehäuses ist ein Belüftungskanal angeordnet, dessen Innenwand von einem Wandabschnitt des Gehäuses gebildet ist. Dem Belüftungskanal ist ein Lüfter zugeordnet, der Außenluft über mindestens eine Eintrittsöffnung in den Belüftungskanal fördert, wobei die Luft über mindestens eine Austrittsöffnung entweicht. Im Inneren des Schaltschrankgehäuses ist ein zweiter Lüfter angeordnet, der die Luft im Gehäuseinneren umwälzt, so daß sie zumindest teilweise an der Innenseite der Gehäusewand entlang streicht, die den Belüftungskanal begrenzt.Out DE 103 21 022 B4 For example, a cabinet for a tablet press has been disclosed, which is attached to the lower part of a press housing. On the outside of the closed cabinet housing a ventilation channel is arranged, the inner wall of a Wall portion of the housing is formed. The ventilation duct is assigned a fan which conveys outside air via at least one inlet opening into the ventilation duct, wherein the air escapes via at least one outlet opening. Inside the cabinet housing a second fan is arranged, which circulates the air inside the housing, so that it at least partially along the inside of the housing wall sweeps along, which limits the ventilation duct.

Aus DE 10 2004 040 163 A1 ist eine Rundläufertablettenpresse bekannt geworden, bei der der Läufer eines elektrischen Antriebsmotors drehfest auf der Rotorwelle angeordnet ist. Der Läufer ist unmittelbar unterhalb des Rotors auf der Rotorwelle angeordnet. Aus diesem Stand der Technik ist ferner bekannt, den Läufer des Antriebsmotors in den Pressenrotor zu integrieren, wobei der Läufer den Motorständer umgibt. Beide Antriebsanordnungen haben den Vorteil, daß eine außerordentlich kompakte Bauweise erzielt werden kann. Dadurch, daß der Motor relativ nahe den Matrizen in der Matrizenscheibe angeordnet ist, überträgt sich die im Motor entwickelte Wärme auch auf die Matrizenscheibe. Normalerweise wird jedoch gefordert, daß die Matrizenscheibe im Bereich der Matrizen eine maximale Temperatur nicht überschreiten darf, die relativ niedrig ist.Out DE 10 2004 040 163 A1 is a rotary tablet press has become known in which the rotor of an electric drive motor is rotatably mounted on the rotor shaft. The rotor is arranged directly below the rotor on the rotor shaft. From this prior art is also known to integrate the rotor of the drive motor in the press rotor, wherein the rotor surrounds the motor stator. Both drive arrangements have the advantage that an extremely compact design can be achieved. The fact that the motor is arranged relatively close to the matrices in the die plate, the heat developed in the engine also transfers to the die plate. Normally, however, it is required that the die plate in the area of the dies should not exceed a maximum temperature which is relatively low.

Der Erfindung liegt die Aufgabe zugrunde, ein Kühlsystem für eine Rundläufertablettenpresse zu schaffen, die auch bei nahe dem Rotor angebrachtem elektrischen Antriebsmotor eine wirksame Kühlung ermöglicht.The invention has for its object to provide a cooling system for a rotary tablet press, which is also near the rotor attached electric drive motor allows effective cooling.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst.This object is solved by the features of patent claim 1.

Bei dem erfindungsgemäßen Kühlsystem ist innerhalb des Gehäuses eine Kältemaschine angeordnet, deren Verdampfer ein Teil eines ersten Wärmetauschers ist, dessen anderer Teil in einem Kühlkreislauf für den Antriebsmotor angeordnet ist. In einem Kanal innerhalb des Gehäuses ist ein Lüfter angeordnet, der Kühlluft über eine Lufteintrittsöffnung im Gehäuse ansaugt und über eine Luftaustrittsöffnung im Gehäuse abgibt, wobei die Kühlluft im Wärmeaustausch mit dem Kondensator der Kältemaschine steht.In the cooling system according to the invention, a chiller is arranged within the housing, the evaporator is part of a first heat exchanger, the other part is arranged in a cooling circuit for the drive motor. In a channel within the housing, a fan is arranged, which sucks in cooling air via an air inlet opening in the housing and emits via an air outlet opening in the housing, wherein the cooling air is in heat exchange with the condenser of the refrigerator.

Mit Hilfe der erfindungsgemäßen Maßnahme kann die Wärme vom Antriebsmotor wirksam entfernt werden, damit es nicht zu einer unerwünschten Erwärmung der Matrizenscheibe kommt. Die Erfindung ermöglicht eine Kühlung mit Mitteln, die im Gehäuseinneren angeordnet sind. Außen angesetzte Lüfter oder angeflanschte Kühlgeräte sind nicht erforderlich.With the help of the measure according to the invention, the heat from the drive motor can be effectively removed so that it does not come to an undesirable heating of the die plate. The invention enables cooling with means which are arranged inside the housing. Externally mounted fans or flanged cooling units are not required.

Nach einer Ausgestaltung der Erfindung ist als Kühlmittel im Kühlkreislauf Wasser vorgesehen.According to one embodiment of the invention, water is provided as the coolant in the cooling circuit.

Nach einer weiteren Ausgestaltung der Erfindung ist die Ansaugöffnung im Boden und die Luftaustrittsöffnung in der Decke des Gehäuses angeordnet. Diese Öffnungen liegen vorzugsweise nahe einer Seitenwand des Gehäuses.According to a further embodiment of the invention, the suction opening in the bottom and the air outlet opening in the ceiling of the housing arranged. These openings are preferably close to a side wall of the housing.

Besonders vorteilhaft ist das erfindungsgemäße Kühlsystem bei einem in den Rotor integrierten Antriebsmotor, wobei der Läufer drehfest mit dem Rotor verbunden ist und der Ständer im Inneren des Läufers liegt. Die Kühlmittelleitungen können dann ohne weiteres mit dem Kühlsystem im Ständer des Elektromotors verbunden werden.The cooling system according to the invention is particularly advantageous in the case of a drive motor integrated in the rotor, the rotor being connected in a rotationally fixed manner to the rotor and the stator lying in the interior of the rotor. The coolant lines can then be easily connected to the cooling system in the stator of the electric motor.

Der Kondensator der Kältemaschine wird bei dem erfindungsgemäßen Kühlsystem mit Raumluft gekühlt. Daher sieht eine Ausgestaltung der Erfindung vor, daß der Kondensator/Wärmetauscher im oberen Bereich des Gehäuses und der Lüfter aufströmseitig vom Kondensator/Wärmetauscher angeordnet ist. Somit ist die Kältemaschine in relativ langgestreckter Anordnung nahe einer Seitenwand des Gehäuses angeordnet und somit platzsparend untergebracht.The condenser of the refrigerator is cooled in the cooling system according to the invention with room air. Therefore, an embodiment of the invention provides that the condenser / heat exchanger in the upper region of the housing and the fan is arranged upstream of the condenser / heat exchanger. Thus, the refrigerator is arranged in a relatively elongated arrangement near a side wall of the housing and thus accommodated to save space.

Die Kanalbereiche, die von Raumluft durchströmt sind, weisen nach einer weiteren Ausgestaltung der Erfindung vorzugsweise eine sogenannte Nanobeschichtung auf. Diese verhindert ein Absetzen von Verunreinigungen an den Kanalwänden, so daß aufwendige Reinigungsvorkehrungen oder dergleichen fortfallen können.The channel regions which are traversed by room air, according to a further embodiment of the invention preferably have a so-called nano-coating. This prevents settling of impurities on the channel walls, so that expensive cleaning arrangements or the like can be omitted.

Nach einer weiteren Ausgestaltung der Erfindung ist im Gehäuse ein zweiter Wärmetauscher angeordnet, durch den das Kühlmittel strömt, und ein zweiter Lüfter erzeugt einen Kühlluftstrom über den Wärmetauscher, der z.B. in das Gehäuse hinein gerichtet ist, um die Gehäuseatmosphäre und damit Teile der Tablettenpresse ausreichend zu kühlen. Es ist auch denkbar, den zweiten Wärme-austauscher an der Wand eines Schaltschranks außerhalb des Pressengehäuses anzubringen, wobei die Kühlmittelleitungen naturgemäß ebenfalls nach außen geführt werden müssen.According to a further embodiment of the invention, a second heat exchanger is arranged in the housing, through which the coolant flows, and a second fan generates a cooling air flow via the heat exchanger, which is directed into the housing, for example, in order to sufficiently cool the housing atmosphere and thus parts of the tablet press. It is also conceivable to install the second heat exchanger on the wall of a control cabinet outside the press housing, wherein the coolant lines must of course also be led to the outside.

Erfindungsgemäß ist es von besonderem Vorteil, wenn auch der Schaltschrank unterhalb des Rotors im Gehäuse angeordnet ist. Da erfindungsgemäß der Antriebsmotor nahe unterhalb des Rotors oder im Rotor selbst angeordnet ist, ist ausreichend Raum für die Plazierung des Schaltschranks am unteren Ende des Gehäuses vorhanden. Da der Schaltschrank bzw. die von ihm aufgenommenen Teile ebenfalls zu kühlen sind, wird nach einer Ausgestaltung der Erfindung das Innere des Schaltschranks vom Kühlluftstrom des zweiten Lüfters durchströmt.According to the invention, it is particularly advantageous if the control cabinet is also arranged below the rotor in the housing. Since, according to the invention, the drive motor is arranged close to below the rotor or in the rotor itself, there is sufficient space for the placement of the control cabinet at the lower end of the housing. Since the control cabinet or the parts taken up by it are also to be cooled, according to one embodiment of the invention, the interior of the cabinet flows through the cooling air flow of the second fan.

Der Rotor mit dem Antrieb kann nach einer weiteren Ausgestaltung der Erfindung innerhalb eines gegenüber dem Gehäuse abgeschlossenen Prozessgehäuses ange-ordnet sein, in das Kühlmittelleitungen hinein bzw. aus diesem heraus geführt sind.According to a further embodiment of the invention, the rotor with the drive can be arranged within a process housing which is closed relative to the housing, into which coolant lines are led into or out of the latter.

Schließlich kann nach einer weiteren Ausgestaltung der Erfindung der Kältemaschine eine Temperaturregelvorrichtung zugeordnet werden, die mit einem Temperatursensor im oder am Rotor und/oder einem Sensor im Gehäuse verbunden ist. Somit kann in der Rundläuferpresse die Wärme geregelt und kontrolliert abgeführt werden. Das Kühlsystem ist in die Tablettenpresse integriert und erfordert keine Außengeräte oder außen an das Gehäuse angesetzte Lüfter, angeflanschte Geräte oder dergleichen. Die Lüftungsöffnungen, wenn sie unten und oben am Gehäuse angebracht sind, bleiben unsichtbar.Finally, according to a further embodiment of the invention, a temperature control device associated with the chiller, which is connected to a temperature sensor in or on the rotor and / or a sensor in the housing. Thus, in the rotary press the heat is controlled and discharged in a controlled manner. The cooling system is integrated into the tablet press and does not require any outdoor units or fans mounted on the outside of the case, flanged units or the like. The vents, when attached to the bottom and top of the enclosure, remain invisible.

Bei der Erfindung wird eine Erwärmung der Matrizenscheibe verhindert, wobei die Temperaturbereiche über die Bedienoberfläche an einem Bedienrechner eingestellt werden können. Die Kühlluft für die Kältemaschine wird von der Luft innerhalb des Gehäuses getrennt. Die Kühlung des Antriebsmotors und damit auch die Kühlung der Matrizenscheibe einerseits und des Prozessraums andererseits erfolgt mit dem Kühlmittel des gleichen Kreislaufs. Die Temperatur des Kühlmittels kann, wie erwähnt, durch Regelung der Kältemaschine vorgewählt werden. Die Wärmeabgabe erfolgt über einen Wärmeaustauscher an die Umgebungsluft.In the invention, a heating of the die plate is prevented, wherein the temperature ranges can be adjusted via the user interface on a control computer. The cooling air for the chiller is separated from the air within the housing. The cooling of the drive motor and thus also the cooling of the die plate on the one hand and the process space on the other hand takes place with the coolant of the same circuit. The temperature of the coolant can, as mentioned, be preselected by controlling the chiller. The heat is released via a heat exchanger to the ambient air.

Vorteilhaft beim erfindungsgemäßen Kühlsystem ist, daß die Abwärme komprimiert zur Abführung bereitsteht und sich auf einem niedrigen Entropieniveau befindet. Da Zusatzgeräte entfallen, werden auch keine zusätzlichen Verbindungsleitungen benötigt, wodurch der Platzbedarf minimal ist. Gleichwohl besteht die Möglichkeit, die Teile des erfindungsgemäßen Kühlsystems über Wartungsöffnungen im Gehäuse zu warten und zu reinigen.An advantage of the cooling system according to the invention is that the waste heat is compressed ready for removal and is at a low Entropieniveau. Since additional devices are eliminated, no additional connecting cables are needed, so that the space requirement is minimal. Nevertheless, it is possible to maintain and clean the parts of the cooling system according to the invention via maintenance openings in the housing.

Wenn vor- und nachstehend von einer Tablettenpresse gesprochen wird, meint dies allgemeine Rundläuferpressen zur Herstellung von Preßlingen aus Pulvermaterial.When referring to a tablet press, above and below, this refers to general rotary presses for the production of compacts of powdered material.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand von Zeichnungen näher erläutert.

Fig. 1
zeigt schematisch den Aufbau eines erfindungsgemäßen Kühlsystems im Gehäuse einer Tablettenpresse.
Fig. 2
zeigt das Blockschaltbild des Kühlsystems nach Fig. 1.
An embodiment of the invention will be explained in more detail with reference to drawings.
Fig. 1
schematically shows the structure of a cooling system according to the invention in the housing of a tablet press.
Fig. 2
shows the block diagram of the cooling system after Fig. 1 ,

In Fig. 1 ist ein quaderförmiges Gehäuse 10 für eine Rundläufertablettenpresse angedeutet. Es steht auf Füßen 12 und somit etwas oberhalb des Untergrundes. Im Gehäuse 10 ist ein Rotor 14 mit Matrizenscheibe 16 einer nicht weiter dargestellten Rundläuferpresse angedeutet, die in einem geeigneten Maschinengestell gelagert ist (nicht gezeigt). Teile des Rotors stehen über ein Prozeßgehäuse 18 unten und oben über, das den Prozeßraum der Presse einhaust, damit Produktionsstaub nicht nach außen gelangt. Es versteht sich, daß nach oben und unten eine entsprechende Abdichtung vorgesehen ist.In Fig. 1 is a cuboid housing 10 indicated for a rotary tablet press. It stands on feet 12 and thus slightly above the ground. In the housing 10, a rotor 14 is indicated with die plate 16 of a rotary press, not shown, which is mounted in a suitable machine frame (not shown). Parts of the rotor are above a process housing 18 below and above over which einhaust the process space of the press, so that production dust does not escape to the outside. It is understood that up and down a corresponding seal is provided.

Der Antriebsmotor ist in den Rotor 14 integriert, wie dies in DE 10 2004 040 163 A1 offenbart ist. Der Stator des Motors steht ebenfalls nach oben und unten über das Prozeßgehäuse 18 hinaus.The drive motor is integrated in the rotor 14 as shown in FIG DE 10 2004 040 163 A1 is disclosed. The stator of the motor is also up and down beyond the process housing 18.

Auf dem Boden des Gehäuses 10 ist ein Schaltschrank 20 angeordnet, der alle elektronischen und elektrischen Bauteile einschließlich eines Maschinenrechners für den Betrieb der Doppelrundläuferpresse enthält. Diese Teile sind an sich bekannt und sollen daher nicht weiter aufgezählt werden.On the bottom of the housing 10, a control cabinet 20 is arranged, which contains all the electronic and electrical components including a machine computer for the operation of the Doppelrundläuferpresse. These parts are known per se and should therefore not be further enumerated.

In einem länglichen, sich vom Boden bis zur Decke des Gehäuses 10 erstreckenden Gehäuse 22 ist eine Kältemaschine untergebracht. Sie weist einen Verdampfer 24, einen Kompressor 26, einen Kondensator 28 und eine Drossel 30 auf. Es handelt sich hierbei um die üblichen Teile eines Kompressionskältekreislaufs, wie er allgemein bekannt ist. Der Verdampfer 24 ist Teil eines Wärmetauschers, dessen anderer Teil 34 Abschnitt eines Kühlkreislaufs bildet. Der Kühlkreislauf setzt sich zusammen aus einem Kühlsystem des Stators des nicht gezeigten Motors, der über Leitungen 36 bzw. 38 mit dem Wärmetauscherteil 34 und einem weiteren Wärmetauscher 40 in Verbindung steht. Der Wärmetauscher 40 ist an der Außenwand des Schaltschranks 20 angebracht, wobei ihm ein Lüfter 42 zugeordnet ist.In an elongated, extending from the bottom to the ceiling of the housing 10 housing 22, a chiller is housed. It has an evaporator 24, a compressor 26, a condenser 28 and a throttle 30. These are the usual parts of a compression refrigeration cycle, as is well known. The evaporator 24 is part of a heat exchanger, the other part 34 forms part of a cooling circuit. The cooling circuit is composed of a cooling system of the stator of the motor, not shown, which communicates via lines 36 and 38 with the heat exchanger part 34 and another heat exchanger 40 in connection. The heat exchanger 40 is mounted on the outer wall of the cabinet 20 with a fan 42 associated therewith.

Ein weiterer Lüfter 44 befindet sich im Gehäuse 22, der über einen Kanal 46 Luft über eine untere Ansaugöffnung 48 ansaugt. Der Kanal 46 ist zwischen dem Gehäuse 22 und der zugeordneten Gehäusewand ausgebildet. Der vom Lüfter 44 angesaugte Luftstrom 50 gelangt über den Kondensator 28 der Kältemaschine zu einer oberen Abluftöffnung 52. Die Kühlung des Kondensators 28 erfolgt mithin durch Raumluft.Another fan 44 is located in the housing 22, which sucks air via a lower intake opening 48 via a channel 46. The channel 46 is formed between the housing 22 and the associated housing wall. The air flow 50 sucked in by the fan 44 passes via the condenser 28 of the chiller to an upper exhaust air opening 52. The cooling of the condenser 28 thus takes place through room air.

Die Kühlung des Antriebsmotors (nicht gezeigt) und der Matrizenscheibe 16 erfolgt mit einem Kühlmittel in dem beschriebenen Kühlkreislauf, das vorzugsweise Wasser ist. Das Kühlmittel strömt - gegebenenfalls durch eine Pumpe unterstützt - durch den Wärmeaustauscher 40, und der Lüfter 42 erzeugt eine Luftströmung 56 innerhalb des Gehäuses 10, die durch den Wärmetauscher 40 ebenfalls gekühlt ist und mithin die Atmosphäre im Gehäuse 10 und damit das Prozeßgehäuse 18 kühlt.The cooling of the drive motor (not shown) and the die plate 16 is carried out with a coolant in the described cooling circuit, which is preferably water. The coolant flows through the heat exchanger 40, optionally assisted by a pump, and the fan 42 generates an air flow 56 within the housing 10, which is also cooled by the heat exchanger 40 and thus cools the atmosphere in the housing 10 and thus the process housing 18.

Im Blockschaltbild nach Fig. 2 sind diejenigen Teile, die bereits in Fig. 1 gezeigt sind, mit gleichen Bezugszeichen versehen. Zusätzlich eingezeichnet sind Antriebsmotoren 60, 62 und 64 für den Kompressor 26 und die Lüfter 44 und 42. Sie werden von einer Regelvorrichtung 66 gesteuert, die mit Sensoren 68 und 70 in Verbindung steht. Der Sensor 68 mißt die Temperatur im Bereich der Matrizenscheibe 16 bzw. innerhalb des Rotors 14. Der Sensor 70 mißt die Temperatur innerhalb des Gehäuses 10 oder das Prozeßgehäuse 18. Die Regelvorrichtung 66 steht in Verbindung mit einem nicht gezeigten Bedienrechner, beispielsweise über eine Funkstrecke. In geeigneter Weise wird in die Regelvorrichtung 66 ein Sollwert für die Temperatur der Matrizenscheibe oder in den Gehäusen 10 bzw. 18 vorgegeben. Durch eine geeignete Regelung der Kältemaschine und der Lüfter 42, 44 wird dafür gesorgt, daß die eingestellte Temperatur erreicht und aufrechterhalten wird.In the block diagram after Fig. 2 are those parts already in Fig. 1 are shown, provided with the same reference numerals. Also shown are drive motors 60, 62 and 64 for the compressor 26 and the fans 44 and 42. They are controlled by a control device 66 which communicates with sensors 68 and 70. The sensor 68 measures the temperature in the region of the die plate 16 or within the rotor 14. The sensor 70 measures the temperature within the housing 10 or the process housing 18. The control device 66 is in communication with an operating computer, not shown, for example via a radio link. In a suitable manner, a desired value for the temperature of the die plate or in the housings 10 or 18 is predetermined in the control device 66. By a suitable control of the chiller and the fan 42, 44 is ensured that the set temperature is reached and maintained.

Claims (11)

Kühlsystem für eine Rundläufertablettenpresse bei der ein Rotor von einem elektrischen Antriebsmotor angetrieben ist und Rotor und Antriebsmotor in einem geschlossenen Gehäuse angeordnet sind und einem Schaltschrank für den Antriebsmotor und weitere Aggregate im Gehäuse, dadurch gekennzeichnet, daß innerhalb des Gehäuses (10) eine Kältemaschine angeordnet ist, deren Verdampfer (24) Teil eines ersten Wärmetauschers ist, dessen anderer Teil (34) in einem Kühlmittelkreislauf für den Antriebsmotor angeordnet ist, in einem gegenüber dem Gehäuseinneren abgeschlossenen Kanal (22) im Gehäuse (10) ein Lüfter (44) angeordnet ist, der Kühlluft über eine Lufteintrittsöffnung (48) des Gehäuses (10) ansaugt und über eine Luftaustrittsöffnung (52) des Gehäuses (10) abgibt, wobei die Kühlluft im Wärmeaustausch mit einem Kondensator (28) der Kältemaschine steht.Cooling system for a rotary tablet press in which a rotor is driven by an electric drive motor and rotor and drive motor are arranged in a closed housing and a cabinet for the drive motor and other units in the housing, characterized in that within the housing (10) a chiller is arranged whose evaporator (24) is part of a first heat exchanger, the other part (34) of which is arranged in a coolant circuit for the drive motor, a fan (44) is arranged in the housing (10) in a closed passage (22) in relation to the housing interior, the cooling air via an air inlet opening (48) of the housing (10) sucks and via an air outlet opening (52) of the housing (10) emits, wherein the cooling air is in heat exchange with a condenser (28) of the chiller. Kühlsystem nach Anspruch 1, dadurch gekennzeichnet, daß als Kühlmittel Wasser vorgesehen ist.Cooling system according to claim 1, characterized in that water is provided as the coolant. Kühlsystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Ansaugöffnung (48) im Boden und die Luftaustrittsöffnung (52) in der Decke des Gehäuses (10) angeordnet ist.Cooling system according to claim 1 or 2, characterized in that the suction opening (48) in the bottom and the air outlet opening (52) in the ceiling of the housing (10) is arranged. Kühlsystem nach Anspruch 3, dadurch gekennzeichnet, daß die Öffnungen (48, 52) nahe einer Seitenwand des Gehäuses liegen.Cooling system according to claim 3, characterized in that the openings (48, 52) are located near a side wall of the housing. Kühlsystem nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Kühlmittelkreislauf über den innen liegenden Motorständer eines in den Rotor (14) integrierten Antriebsmotors verläuft, wobei der Läufer mit dem Rotor (14) in Drehverbindung steht.Cooling system according to one of claims 1 to 4, characterized in that the coolant circuit extends over the inner motor stator of a drive motor integrated in the rotor (14), wherein the rotor is in rotary connection with the rotor (14). Kühlsystem nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Kondensator/Wärmeaustauscher (28) im oberen Bereich des Gehäuses (10) und der Lüfter (44) aufströmseitig vom Kondensator/Wärmeaustauscher (28) angeordnet ist.Cooling system according to one of claims 1 to 5, characterized in that the condenser / heat exchanger (28) in the upper region of the housing (10) and the fan (44) is arranged upstream of the condenser / heat exchanger (28). Kühlsystem nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Kanal und der von der Kühlluft beaufschlagte Teil des Kondensators (28) eine Nanobeschichtung aufweisen.Cooling system according to one of claims 1 to 6, characterized in that the duct and the part of the condenser (28) acted upon by the cooling air have a nano-coating. Kühlsystem nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß im Gehäuse (10) ein weiterer Wärmetauscher (40) angeordnet ist, durch den das Kühlmittel strömt und ein zweiter Lüfter (42) dem Wärmetauscher (40) zugeordnet ist, der einen Kühlluftstrom im Gehäuse (10) erzeugt.Cooling system according to one of claims 1 to 7, characterized in that in the housing (10), a further heat exchanger (40) is arranged, through which the coolant flows and a second fan (42) is associated with the heat exchanger (40) having a cooling air flow generated in the housing (10). Kühlsystem nach Anspruch 4 und 8, dadurch gekennzeichnet, daß ein Schaltschrank (20) unterhalb des Rotors (14) im Gehäuse (10) angeordnet oder das Innere des Schaltschranks (20) vom Kühlluftstrom des zweiten Lüfters (42) durchströmt ist.Cooling system according to Claims 4 and 8, characterized in that a control cabinet (20) is arranged below the rotor (14) in the housing (10) or the interior of the control cabinet (20) is flowed through by the cooling air flow of the second fan (42). Kühlsystem nach einem der Ansprüche 4 bis 9, dadurch gekennzeichnet, daß der Rotor (14) mit Antrieb im Wesentlichen abgedichtet innerhalb eines gegenüber dem Gehäuse (10) abgeschlossenen Prozessgehäuses (18) angeordnet ist, wobei die Kühlmittelleitungen (36, 38) in den Stator des Antriebsmotors hinein bzw. aus diesem heraus geführt sind.Cooling system according to one of claims 4 to 9, characterized in that the rotor (14) with drive substantially sealed within a relative to the housing (10) closed process housing (18) is arranged, wherein the coolant lines (36, 38) in the stator the drive motor in and out of this are out. Kühlsystem nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß der Kältemaschine eine Temperaturregelvorrichtung (66) zugeordnet ist, die mit einem Temperatursensor (68) im oder am Rotor (14) und/oder einem Sensor (70) im Gehäuse (10, 18) verbunden ist.Cooling system according to one of claims 1 to 10, characterized in that the cooling machine is associated with a temperature control device (66) which is connected to a temperature sensor (68) in or on the rotor (14) and / or a sensor (70) in the housing (10, 18) is connected.
EP08012570.1A 2007-07-24 2008-07-11 Rotary tablet press with a cooling system Not-in-force EP2018958B1 (en)

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DE102007034360.6A DE102007034360C5 (en) 2007-07-24 2007-07-24 Cooling system for a rotary tablet press

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US20090027854A1 (en) 2009-01-29
DE102007034360C5 (en) 2014-06-18
US7881058B2 (en) 2011-02-01
DE102007034360B4 (en) 2009-09-10
DE102007034360A1 (en) 2009-01-29
EP2018958A3 (en) 2012-01-04
EP2018958B1 (en) 2014-01-15

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