EP0454618A1 - Drafting roller unit - Google Patents

Drafting roller unit Download PDF

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Publication number
EP0454618A1
EP0454618A1 EP91810204A EP91810204A EP0454618A1 EP 0454618 A1 EP0454618 A1 EP 0454618A1 EP 91810204 A EP91810204 A EP 91810204A EP 91810204 A EP91810204 A EP 91810204A EP 0454618 A1 EP0454618 A1 EP 0454618A1
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EP
European Patent Office
Prior art keywords
godet
drive motor
circulation space
roller unit
stretching roller
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
EP91810204A
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German (de)
French (fr)
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EP0454618B1 (en
Inventor
Vittorino Arnosti
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP0454618A1 publication Critical patent/EP0454618A1/en
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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
    • D02J13/005—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass by contact with at least one rotating roll
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/224—Selection or control of the temperature during stretching

Definitions

  • the present invention relates to a draw roll unit for draw-bobbin, spinning-draw-winder and draw-twisting machines with an inductively heatable godet according to the preamble of claim 1.
  • the draw rollers are mostly driven by their own electric drive motor. Sparks can jump both in the motor and in the stretching roller, also called godet, within which windings for inductive heating are arranged. Simultaneously with the stretching process, it is common and often necessary to apply preparation agents to the yarn to be stretched. These preparation agents usually contain a proportion of volatile, easily flammable solvents. During the stretching process on the hot godet surface, the volatile, flammable parts of the preparation can evaporate from the yarn and together with the room air form a flammable, possibly explosive mixture that can be ignited by sparking in the stretch roller unit or in the drive motor.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims, solves the problem of creating a stretching roller unit which can be used in potentially explosive areas.
  • it is possible to flood the stretching roller unit with an incombustible gas without changing its dimensions Need to become.
  • This enables interchangeability with conventional units.
  • This goal is achieved in that the incombustible gas is introduced into the fixed, drive-side part of the unit and runs through one or more circulation spaces from the drive side through the drive motor and / or the stretching roller and sweeps over all unit parts that may come into being due to sparking.
  • the small cross-section of the annular gap between the godet surface and the housing means that a constant overpressure can be maintained in the latter even with a very small amount of gas supplied to the unit.
  • the small amount of gas required has no influence on the temperature at the godet surface;
  • the gas flowing through increases the cooling in the drive motor.
  • the cooling for the stator part of the electric motor takes place independently of the flow through the central part of the unit.
  • the engine cooling which requires a large amount of air, can be done with room air, since no sparks can occur in the cooling area.
  • No sealant is required between standing and rotating parts for the access of the protective gas, since the supply takes place in the housing enclosing the motor and / or the godet.
  • there are no high demands on the tightness of this housing since small losses can be borne by the low overpressure required within the circulation space. The low overpressure is sufficient because the gas only has to prevent the entry of oxygen from the environment.
  • the two figures show a longitudinal section through a stretching roller unit, in which all parts that are not essential to the invention are omitted or only shown schematically.
  • the stretching roller unit 1 according to the invention according to FIG. 1 is fixed rigidly or elastically in the area of the drive motor 3 on a bearing frame 5.
  • the shaft 7 of the drive motor 3 projects beyond the motor housing 23 and carries on one side a first bearing 11 and on the other side a second bearing 13 and the stretching roller or godet 15. The latter is pushed onto the conical end 17 of the shaft 7 and with it screwed.
  • the rotor 19 is shown between the two bearings 11 and 13.
  • the stator 21, the motor housing 23 and the cooling fins 25 are visible outside the rotor 19.
  • a housing 27 Connected to the motor 3 is a housing 27 which receives the electrical transmission elements and which is closed on the back by a screwed-on terminal housing 29.
  • a supply line 31 for supplying gas is let into the terminal housing 29.
  • the cup-shaped godet 15 completely encloses the end 33 of the shaft 7.
  • the sleeve 37 has an inductor flange 39 on the drive motor side.
  • a cover collar 41 the bore diameter of which is only slightly larger than the outer diameter of the godet 15, which penetrates the cover collar 41, is attached to the drive motor 3.
  • the cover collar 41 is preferably made of a softer material than the godet 15, so that when the unit 1 runs in during commissioning when the cover collar 41 touches the godet surface 43, the latter is not damaged and a minimal annular gap 45 can be generated.
  • the shaft 7 is penetrated by an axial bore 47.
  • This bore 47 receives the feeds for the temperature probes 49 installed in the godet 15 for the temperature improvement of the godet surface 43.
  • the signals of the rotating probes 49 are transmitted to the fixed electronics 51 without contact in the housing 27.
  • a cover 53 in the form of a hollow cylinder jacket extends from the housing 27 over the motor housing 23 and encloses all the underlying parts of the motor 3 and the electronics 51.
  • a cooling air supply connection 55 connects the ventilation space 57 formed by the cover 53 and the surface of the motor housing 23 and the housing 27. The air exits from ventilation space 57 in area Y (arrow 58).
  • the feed line 31 in the terminal housing 29 forms the entrance to a circulation space 59 which begins in the terminal housing 29 and ends at the annular gap 45.
  • the circulation space 59 comprises the entire area of the electronics 51, in which the signal is transferred from rotating to stationary parts, and the pressure monitor 71, and extends further, partly in bores 52, partly through slots into the drive motor 3.
  • the circulation space 59 extends further to the area of the bearing 13. After a slight narrowing due to recesses and / or one or more bores 61, the circulation space 59 continues within the godet 15, first in a disk-shaped space running radially inward 63 to the shaft 7.
  • the space 59 extends as an annular gap 65 along the shaft end 33 to the end face 67 of the godet 15.
  • the circulation space 59 is again disk-shaped and then sits radially outside in a cylindrical gap 69 in the direction of the drive side and ends at the gap 45 between de r godet surface 43 and the cover collar 41.
  • the described circulation space 59 forms a closed jacket around all possible spark sources present on the stretching roller assembly 1.
  • the parts of the electronics 51 could be arranged in a rotating / fixed manner outside the circulation space 59 in a separate closed space.
  • non-flammable gas is used for a predetermined time, for example three minutes, before start-up let in.
  • the mode of operation can be determined using one or more pressure gauges that are connected to the circulation space the rinse during the stretching process by continuously monitoring the overpressure.
  • Room air can be introduced through the air supply connection 55, even if it contains flammable gases, and the drive motor 3 can be cooled.
  • the rinse, which is supplied through line 31, can be obtained from a bottle or from the atmosphere outside the working area of the stretching roller unit 1.
  • FIG. 2 apparently shows such a stretching roller unit, which has two separate circulation spaces for the drive motor 103 and the stretching roller 115.
  • a bearing with the two bearings 111 and 113 is located in the center.
  • the drive motor 103 is arranged on the left side of the bearing and the godet 115 on the right side.
  • gas is fed into the circulation space 159 through the line 131. At the other end of engine 103, the gas can escape again through a gap 145.
  • Gas is fed through a line 180 into a circulation space 183 in the godet 115 and can leave the godet 115 again through a gap 181.
  • the two feed lines 131 and 180 as well as the two outlet areas 145 and 181 can each be connected to a common feed or drain line (no illustration).

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)

Abstract

The drafting-roller unit (1) has a circulation space (59) which completely surrounds all the spark-generating elements of the unit. In the galette (15), the circulation space (59) initially guides the scavenging gas into an annular space along the shaft (7) to the bottom (67) of the galette (15) and from there back between the winding stack (35) of the induction winding (35) under the galette surface (43). A gap (45) of minimum width between the galette surface (43) and a covering collar (41) supporting the galette (15) and the stationary parts of the unit form the outlet orifice for the scavenging gas.

Description

Die vorliegende Erfindung bezieht sich auf ein Streckrollenaggregat für Streckspul-, Spinnstreckspul- und Streckzwirnmaschinen mit einer induktiv beheizbaren Galette gemäss Oberbegriff des Patentanspruches 1.The present invention relates to a draw roll unit for draw-bobbin, spinning-draw-winder and draw-twisting machines with an inductively heatable godet according to the preamble of claim 1.

Bei den Streckspul-, Spinnstreckspul- und Streckzwirnmaschinen werden die Streckrollen meistens von einem eigenen elektrischen Antriebsmotor angetrieben. Sowohl im Motor als auch in der Streckrolle, auch Galette genannt, innerhalb welcher Wicklungen für eine Induktivheizung angeordnet sind, können Funken springen.
Gleichzeitig mit dem Streckvorgang ist es üblich und oft nötig, auf das zu verstreckende Garn Präparationsmittel aufzubringen. Diese Präparationsmittel enthalten meistens einen Anteil von leichtflüchtigen, leicht brennbaren Lösungsmitteln. Während des Streckvorganges auf der heissen Galettenoberfläche können die leichtflüchtigen, brennbaren Anteile der Präparationsmittel aus dem Garn verdunsten und zusammen mit der Raumluft ein brennbares, allenfalls explosives Gemisch bilden, das durch Funkenbildung im Streckrollenaggregat oder im Antriebsmotor entzündet werden kann.In the draw-bobbin, spinning-draw-bobbin and draw-twisting machines, the draw rollers are mostly driven by their own electric drive motor. Sparks can jump both in the motor and in the stretching roller, also called godet, within which windings for inductive heating are arranged.
Simultaneously with the stretching process, it is common and often necessary to apply preparation agents to the yarn to be stretched. These preparation agents usually contain a proportion of volatile, easily flammable solvents. During the stretching process on the hot godet surface, the volatile, flammable parts of the preparation can evaporate from the yarn and together with the room air form a flammable, possibly explosive mixture that can be ignited by sparking in the stretch roller unit or in the drive motor.

Um die Explosisionsgefahr zu verhindern, ist es denkbar, anstelle eines gewöhnlichen Antriebsmotors eine im Handel erhältliche explosionsgeschützte Ausführung für den Antrieb der Streckrolle zu verwenden. Solche explosionsgeschützte Antriebsmotoren sind wesentlich teurer als ungeschützte und verursachen zudem infolge grösserer Abmessungen Raumprobleme, wenn sie nachträglich in bestehende Streckspulmaschinen eingebaut werden müssen. Im weiteren müssen dann auch sämtliche Ueberwachungseleinente explosionsgeschützt hergestellt und für die Streckrolle ein vom Motor unabhängiger Explosionsschutz gewährleistet sein.To prevent the risk of explosion, it is conceivable to use a commercially available explosion-proof version for driving the stretching roller instead of a conventional drive motor. Such explosion-proof drive motors are much more expensive than unprotected ones and, due to their larger dimensions, also cause space problems if they have to be retrofitted into existing stretch winding machines. Furthermore, all monitoring elements must then be manufactured in an explosion-proof manner and explosion protection independent of the motor must be guaranteed for the stretching roller.

Hier will die Erfindung Abhilfe schaffen.
Die Erfindung, wie sie in den Ansprüchen gekennzeichnet ist, löst die Aufgabe, ein Streckrollenaggregat zu schaffen, welches in explosionsgefährdeten Räumen verwendet werden kann.
Es gelingt mit der erfindungsgemässen Ausbildung, das Streckrollenaggregat mit einem unbrennbaren Gas zu durchfluten, ohne dass dessen Abmessungen verändert werden müssen. Dies ermöglicht eine Austauschbarkeit mit den herkömmlichen Aggregaten.
Erreicht wird dieses Ziel dadurch, dass das unbrennbare Gas am feststehenden, antriebsseitigen Teil des Aggregates in dieses eingebracht und durch einen oder mehrere Zirkulationsräume von der Antriebsseite durch den Antriebsmotor und/oder die Streckrolle hindurch verläuft und sämtliche durch eine Funkenbildung in Frage kommende Aggregatteile überstreicht. Der geringe Querschnitt des Ringspaltes zwischen der Galettenoberfläche und dem Gehäuse bewirkt, dass bereits bei einer sehr kleinen, dem Aggregat zugeführten Gasmenge im letzteren ein konstanter Ueberdruck aufrechterhalten werden kann. Die geringe notwendige Gasmenge hat keinen Einfluss auf die Temperatur an der Galettenoberfläche; im Antriebsmotor erhöht das durchfliessende Gas zusätzlich die Kühlung. Die Kühlung für den Statorteil des Elektromotors erfolgt unabhängig von der Durchflutung des zentralen Teiles des Aggregates. Die eine hohe Luftmenge erforderlich machende Motorkühlung kann mit Raumluft erfolgen, da im Kühlbereich keine Funken entstehen können.
Von der Gasspülung können nicht nur die Wicklung des Elektromotors und jene der Induktionsheizung erfasst werden, sondern es ist gleichzeitig und ohne wesentlichen Mehraufwand möglich, auch sämtliche Steuerorgane innerhalb eines einzigen oder in nach Aggregatsteilen aufgeteilten Zirkulationsraumes unterzubringen. Für den Zutritt des Schutzgases sind keine Dichtungsmittel zwischen stehenden und rotierenden Teilen notwendig, da die Zufuhr in das den Motor und/oder die Galette einschliessende Gehäuse erfolgt. Auch sind an die Dichtigkeit dieses Gehäuses keine hohen Anforderungen zu stellen, da durch den geringen notwendigen Ueberdruck innerhalb des Zirkulationsraumes kleine Verluste tragbar sind. Der geringe Überdruck reicht aus, weil das Gas nur den Zutritt von Sauerstoff aus der Umgebung zu verhindern hat.The invention seeks to remedy this.
The invention, as characterized in the claims, solves the problem of creating a stretching roller unit which can be used in potentially explosive areas.
With the design according to the invention, it is possible to flood the stretching roller unit with an incombustible gas without changing its dimensions Need to become. This enables interchangeability with conventional units.
This goal is achieved in that the incombustible gas is introduced into the fixed, drive-side part of the unit and runs through one or more circulation spaces from the drive side through the drive motor and / or the stretching roller and sweeps over all unit parts that may come into being due to sparking. The small cross-section of the annular gap between the godet surface and the housing means that a constant overpressure can be maintained in the latter even with a very small amount of gas supplied to the unit. The small amount of gas required has no influence on the temperature at the godet surface; The gas flowing through increases the cooling in the drive motor. The cooling for the stator part of the electric motor takes place independently of the flow through the central part of the unit. The engine cooling, which requires a large amount of air, can be done with room air, since no sparks can occur in the cooling area.
Not only can the winding of the electric motor and that of the induction heating be detected by the gas purging, but it is also possible at the same time and without significant additional effort to accommodate all of the control elements within a single or in a circulation space divided into unit parts. No sealant is required between standing and rotating parts for the access of the protective gas, since the supply takes place in the housing enclosing the motor and / or the godet. Also, there are no high demands on the tightness of this housing, since small losses can be borne by the low overpressure required within the circulation space. The low overpressure is sufficient because the gas only has to prevent the entry of oxygen from the environment.

Die Erfindung wird anhand zweier bevorzugter Ausführungsformen näher beschrieben.
Es zeigen

  • Figur 1 einen Querschnitt durch ein Streckrollenaggregat mit einem gemeinsamen Zirkuationsraum und
  • Figur 2 einen Querschnitt durch ein Streckrollenaggregat mit getrennten Zirkulationsräumen für die einzelnen Aggregatsteile
The invention is described in more detail using two preferred embodiments.
Show it
  • 1 shows a cross section through a stretching roller unit with a common circulation space and
  • Figure 2 shows a cross section through a stretching roller unit with separate circulation spaces for the individual unit parts

Die beiden Figuren zeigen einen Längsschnitt durch ein Streckrollenaggregat, bei dem alle für die Erfindung nicht wesentlichen Teile weggelassen oder nur schematisch dargestellt sind. Das erfindungsgemässe Streckrollenaggregate 1 nach Figur 1 ist im Bereich des Antriebsmotors 3 auf einem Lagerrahmen 5 starr oder elastisch befestigt. Die Welle 7 des Antriebsmotors 3 überragt das Motorgehäuse 23 und trägt auf der einen Seite ein erstes Lager 11 und auf der anderen Seite ein zweites Lager 13 sowie die Streckrolle oder Galette 15. Letztere ist auf das konische Ende 17 der Welle 7 aufgeschoben und mit dieser verschraubt. Zwischen den beiden Lagern 11 und 13, ist der Rotor 19 dargestellt. Ausserhalb des Rotors 19 sind der Stator 21, das Motorgehäuse 23 und die Kühlrippen 25 sichtbar.
Mit dem Motor 3 verbunden ist ein die elektrischen Uebertragungsorgane aufnehmendes Gehäuse 27, das auf der Rückseite durch ein aufgeschraubtes Klemmengehäuse 29 verschlossen ist. Im Klemmengehäuse 29 ist eine Zuleitung 31 zum Zuführen von Gas eingelassen.
Die becherförmig ausgebildete Galette 15 umschliesst das Ende 33 der Welle 7 vollständig. Im Innern der Galette 15 ist das Paket der Induktionswicklungen 35, welche von einer feststehenden, mit dem Antriebsmotor 3 verschraubten, zylindrischen Hülse 37 getragen werden, sichtbar. Die Hülse 37 weist antriebsmotorseitig einen Induktorflansch 39 auf. Ein Abdeckkragen 41, dessen Bohrungsdurchmesser nur geringfügig grösser ist als der Aussendurchmesser der Galette 15, die den Abdeckkragen 41 durchdringt, ist am Antriebsmotor 3 befestigt. Vorzugsweise ist der Abdeckkragen 41 aus einem weicheren Material hergestellt als die Galette 15, damit beim Einlaufen des Aggregates 1 bei der Inbetriebnahme bei Berührung des Abdeckkragens 41 durch die Galettenobefläche 43 die letztere nicht beschädigt und ein minimaler Ringspalt 45 erzeugbar ist.The two figures show a longitudinal section through a stretching roller unit, in which all parts that are not essential to the invention are omitted or only shown schematically. The stretching roller unit 1 according to the invention according to FIG. 1 is fixed rigidly or elastically in the area of the drive motor 3 on a bearing frame 5. The shaft 7 of the drive motor 3 projects beyond the motor housing 23 and carries on one side a first bearing 11 and on the other side a second bearing 13 and the stretching roller or godet 15. The latter is pushed onto the conical end 17 of the shaft 7 and with it screwed. The rotor 19 is shown between the two bearings 11 and 13. The stator 21, the motor housing 23 and the cooling fins 25 are visible outside the rotor 19.
Connected to the motor 3 is a housing 27 which receives the electrical transmission elements and which is closed on the back by a screwed-on terminal housing 29. A supply line 31 for supplying gas is let into the terminal housing 29.
The cup-shaped godet 15 completely encloses the end 33 of the shaft 7. Inside the godet 15, the package of induction windings 35, which are carried by a fixed cylindrical sleeve 37 screwed to the drive motor 3, is visible. The sleeve 37 has an inductor flange 39 on the drive motor side. A cover collar 41, the bore diameter of which is only slightly larger than the outer diameter of the godet 15, which penetrates the cover collar 41, is attached to the drive motor 3. The cover collar 41 is preferably made of a softer material than the godet 15, so that when the unit 1 runs in during commissioning when the cover collar 41 touches the godet surface 43, the latter is not damaged and a minimal annular gap 45 can be generated.

Die Welle 7 wird von einer axialen Bohrung 47 durchdrungen. Diese Bohrung 47 nimmt die Zuführungen für die in der Galette 15 eingebauten Temperatursonden 49 für die Temperaturinessung der Galettenobefläche 43 auf. Die Signalübergabe der mitdrehenden Sonden 49 an die feststehende Elektronik 51 erfolgt berührungsfrei im Gehäuse 27.The shaft 7 is penetrated by an axial bore 47. This bore 47 receives the feeds for the temperature probes 49 installed in the godet 15 for the temperature improvement of the godet surface 43. The signals of the rotating probes 49 are transmitted to the fixed electronics 51 without contact in the housing 27.

Vom Gehäuse 27 führt eine hohlzylindermantelförmige Abdeckung 53 über das Motorgehäuse 23 und umschliesst sämtliche darunterliegende Teile des Motors 3 und der Elektronik 51. Ein Kühlluft-Zufuhrstutzen 55 verbindet den durch die Abdeckung 53 und die Oberfläche des Motorgehäuses 23 sowie des Gehäuses 27 gebildeten Lüftungsraum 57. Der Luftaustritt aus dem Lüftungsraum 57 erfolgt im Bereich Y (Pfeil 58).A cover 53 in the form of a hollow cylinder jacket extends from the housing 27 over the motor housing 23 and encloses all the underlying parts of the motor 3 and the electronics 51. A cooling air supply connection 55 connects the ventilation space 57 formed by the cover 53 and the surface of the motor housing 23 and the housing 27. The air exits from ventilation space 57 in area Y (arrow 58).

Die Zuleitung 31 im Klemmengehäuse 29 bildet den Eingang zu einem im Klemmengehäuse 29 beginnenden und am Ringspalt 45 endenden Zirkulationsraum 59. Beginnend am Boden des Klemmengehäuses 29 umfasst der Zirkulationsraum 59 den gesamten Bereich der Elektronik 51, in welchem die Signalübergabe von drehenden zu feststehenden Teilen erfolgt sowie der Drucküberwachung 71 und zieht sich weiter, teils in Bohrungen 52, teils durch Schlitze hinein in den Antriebsmotor 3. Durch einen ringförmigen Raum zwischen dem Stator 21 und dem Motorgehäuse 23 zieht sich der Zirkulationsraum 59 weiter zum Bereich des Lagers 13. Nach einer leichten Verengung durch Aussparungen und/oder eine oder mehrere Bohrungen 61 setzt sich der Zirkulationsraum 59 fort innerhalb der Galette 15, und zwar zuerst radial nach innen verlaufend in einen scheibenförmigen Raum 63 bis hin zur Welle 7. Von dort erstreckt sich der Raum 59 als Ringspalt 65 entlang dem Wellenende 33 zur Stirnseite 67 der Galette 15. Im Bereich des Wellenendes 17 ist der Zirkulationsraum 59 wieder scheibenförmig ausgebildet und setzt sich radial ausserhalb dann in einem zylindrischen Spalt 69 in Richtung auf die Antriebsseite fort und endet beim Spalt 45 zwischen der Galettenoberfläche 43 und dem Abdeckkragen 41. Der beschriebene Zirkulationsraum 59 bildet einen geschlossenen Mantel um sämtliche am Streckrollenaggregat 1 vorhandenen möglichen Funkenquellen.The feed line 31 in the terminal housing 29 forms the entrance to a circulation space 59 which begins in the terminal housing 29 and ends at the annular gap 45. Starting at the bottom of the terminal housing 29, the circulation space 59 comprises the entire area of the electronics 51, in which the signal is transferred from rotating to stationary parts, and the pressure monitor 71, and extends further, partly in bores 52, partly through slots into the drive motor 3. Through an annular space between the stator 21 and the Motor housing 23, the circulation space 59 extends further to the area of the bearing 13. After a slight narrowing due to recesses and / or one or more bores 61, the circulation space 59 continues within the godet 15, first in a disk-shaped space running radially inward 63 to the shaft 7. From there, the space 59 extends as an annular gap 65 along the shaft end 33 to the end face 67 of the godet 15. In the region of the shaft end 17, the circulation space 59 is again disk-shaped and then sits radially outside in a cylindrical gap 69 in the direction of the drive side and ends at the gap 45 between de r godet surface 43 and the cover collar 41. The described circulation space 59 forms a closed jacket around all possible spark sources present on the stretching roller assembly 1.

Selbstverständlich könnten die Teile der Elektronik 51 mit Ausnahme der Uebertragungsstellen rotierend/feststehend ausserhalb des Zirkulationsraumes 59 in einem separaten verschlossenen Raum angeordnet sein. Dies würde aber eine Vielzahl von luftdicht zu verschliessende Durchbrüche bedingen. Es bestünde auch die Möglichkeit, die funkenerzeugenden Elemente in explosionsgeschützter Bauweise herzustellen. Dies verursacht jedoch um ein Vielfaches höhere Kosten.Of course, with the exception of the transmission points, the parts of the electronics 51 could be arranged in a rotating / fixed manner outside the circulation space 59 in a separate closed space. However, this would require a large number of openings to be sealed airtight. It would also be possible to manufacture the spark-generating elements in an explosion-proof design. However, this causes many times higher costs.

Während des Betriebes des Streckrollenaggregates 1 wird durch die Zuleitung 31 Stickstoff, saubere Luft oder ein anderes nicht brennbares Gas in den Zirkulationsraum 59 eingeleitet. Dieses füllt den gesamten oben beschriebenen Raum auf und durchspült diesen, bis es entlang dem Spalt 45 nach aussen in den Raum austritt oder, falls eine entsprechende Verbindungsleitung vorgesehen wird, in einen Raum ausserhalb des Aufstellungsortes des Aggregates. Durch die geringe Breite des Ringspaltes 45 kann bereits durch eine kleine eingangs zugeführte Menge im Innern des Zirkulationsraumes 59 ein Druck aufgebaut werden und so der Zutritt von allenfalls explosivem oder brennbarem Gas aus der Umgebung zu funkenerzeugenden Teilen im Innern des Aggregates 1 sicher verhindert werden. Damit nach einem Stillstand oder einer Erstinbetriebnahme das im Innern befindliche, bei der Herstellung oder beim Stillstand eindiffundierte Gas, dessen Zusammensetzung unbekannt ist, aus dem Zirkulationsraum 59 sicher entfernt werden kann, wird jeweils vor Inbetriebnahme während einer vorgebbaren Zeit, z.B. drei Minuten, unbrennbares Gas eingelassen. Mittels eines oder mehrerer Manometer, die mit dem Zirkulationsraum in Verbindung stehen, kann die Funktionsweise der Spülung während des Streckprozesses durch Messung des Ueberdruckes kontinuierlich überwacht werden.During operation of the stretching roller assembly 1, nitrogen, clean air or another non-combustible gas is introduced into the circulation space 59 through the feed line 31. This fills up the entire space described above and flushes it out until it emerges outwards into the space along the gap 45 or, if a corresponding connecting line is provided, into a space outside the installation site of the unit. Due to the small width of the annular gap 45, a pressure can be built up in the interior of the circulation space 59 even with a small quantity supplied at the beginning, and thus the access of any explosive or flammable gas from the environment to spark-generating parts inside the unit 1 can be reliably prevented. So that after a standstill or initial start-up, the gas inside, diffused during manufacture or during standstill, the composition of which is unknown, can be safely removed from the circulation space 59, non-flammable gas is used for a predetermined time, for example three minutes, before start-up let in. The mode of operation can be determined using one or more pressure gauges that are connected to the circulation space the rinse during the stretching process by continuously monitoring the overpressure.

Durch den Luftzufuhrstutzen 55 kann Raumluft, auch wenn diese feuergefährliche Gase enthält, eingeführt und der Antriebsmotor 3 gekühlt werden.
Die Spülung, welche durch die Leitung 31 zugeführt wird, kann aus einer Flasche oder aus der Atmosphäre ausserhalb des Arbeitsraumes des Streckrollenaggregates 1 bezogen werden.Room air can be introduced through the air supply connection 55, even if it contains flammable gases, and the drive motor 3 can be cooled.
The rinse, which is supplied through line 31, can be obtained from a bottle or from the atmosphere outside the working area of the stretching roller unit 1.

Selbstverständlich könnte anstelle eines einzigen, das gesamte Aggregat umspülenden Zirkulationsraumes 59 auch eine Aufteilung in mehrere, separat gespeiste Abschnitte, z.B. Antriebsmotor und Galette, vorgesehen werden. Figur 2 zeigt scheinatisch ein solches Streckrollenaggregat, das zwei getrennte Zirkulationsräume für den Antriebsmotor 103 und die Streckrolle 115 aufweist. Im Zentrum befindet sich eine Lagerung mit den zwei Lagern 111 und 113. Auf der linken Seite der Lagerung ist der Antriebsmotor 103 und auf der rechten Seite die Galette 115 angeordnet. Analog zum Beispiel gemäss Figur 1 wird Gas durch die Leitung 131 in den Zirkulationsraum 159 eingespiesen. Am anderen Ende des Motors 103 kann das Gas durch einen Spalt 145 wieder austreten.
Durch eine Leitung 180 wird Gas in einen Zirkulationsraum 183 in der Gallette 115 eingespeist und kann durch einen Spalt 181 die Galette 115 wieder verlassen. Die beiden Speiseleitungen 131 und 180 sowie die beiden Austrittsbereiche 145 und 181 können jweils an eine gemeinsamen Speise- bzw. Abzugsleitung angeschlossen sein (keine Abb.)Of course, instead of a single circulation space 59 washing around the entire unit, a division into a plurality of separately fed sections, for example drive motor and godet, could also be provided. FIG. 2 apparently shows such a stretching roller unit, which has two separate circulation spaces for the drive motor 103 and the stretching roller 115. A bearing with the two bearings 111 and 113 is located in the center. The drive motor 103 is arranged on the left side of the bearing and the godet 115 on the right side. Analogously to the example according to FIG. 1, gas is fed into the circulation space 159 through the line 131. At the other end of engine 103, the gas can escape again through a gap 145.
Gas is fed through a line 180 into a circulation space 183 in the godet 115 and can leave the godet 115 again through a gap 181. The two feed lines 131 and 180 as well as the two outlet areas 145 and 181 can each be connected to a common feed or drain line (no illustration).

Claims (5)

Streckrollenaggregat (1,101) für Streckspul-, Spinnstreckspul- und Streckzwirnmaschinen mit einer induktiv beheizbaren Galette (15,115) und einem elektrischen Antriebsmotor (3,103) für die Galette (15,115) mit einer die Drehbewegung des Antriebsmotors (3,103) auf die Galette (15,115) übertragenden Welle (7,107), welche in wenigstens zwei Lagern (11,13;111,113) drehbar gelagert ist, dadurch gekennzeichnet, dass der Antriebsmotor (3,103), die stromübertragenden Zuführungen für den Motor (3,103) und die Galette (15,115) sowie die elektronischen Komponenten zur Ueberwachung der Galettentemperatur und die Induktionswicklungen (35,135) zur Beheizung der Galette ( 15, 115) von einem Zirkulationsraum (59, 159, 183) umgeben sind, und dass der Zirkulationsraum (59,159,183) mit einem Gas spülbar ist.Stretching roller unit (1,101) for drawn-winding, spinning-stretch-wound and drawn-twisting machines with an inductively heatable godet (15,115) and an electric drive motor (3,103) for the godet (15,115) with a shaft which transmits the rotary motion of the drive motor (3,103) to the godet (15,115) (7,107), which is rotatably mounted in at least two bearings (11,13; 111,113), characterized in that the drive motor (3,103), the current-transmitting feeds for the motor (3,103) and the godet (15,115) and the electronic components for Monitoring the godet temperature and the induction windings (35, 135) for heating the godet (15, 115) are surrounded by a circulation space (59, 159, 183), and that the circulation space (59, 159, 183) can be flushed with a gas. Streckrollenaggregat nach Anspruch 1, dadurch gekennzeichnet, dass sich der Zirkulationsraum (59, 159, 183) an der Stirnseite der Induktionswicklung (35,135) der Galette (15,115) radial nach aussen und unter der Galettenoberfläche in einem Spalt (69,169) in Richtung zum Antriebsmotor (3,103) erstreckt.Stretching roller unit according to Claim 1, characterized in that the circulation space (59, 159, 183) on the end face of the induction winding (35, 135) of the godet (15, 115) radially outwards and under the godet surface in a gap (69, 169) in the direction of the drive motor ( 3,103). Streckrollenaggregat nach Anspruch 2, dadurch gekennzeichnet, dass der Zirkulationsraum (59,159,183) am antriebsmotorseitigen Ende der Galette (15,115) mit der Atmosphäre verbunden ist.Stretching roller unit according to Claim 2, characterized in that the circulation space (59, 159, 183) is connected to the atmosphere at the end of the godet (15, 115) on the drive motor side. Streckrollenaggregat nach Anspruch 3, dadurch gekennzeichnet, dass die Verbindung des Zirkulationsraumes (59,159,183) mit der Atmosphäre aus einem Ringspalt (45,181) zwischen der Galettenoberfläche (43,143) und einem feststehenden Abdeckkragen (41,141) besteht.Stretching roller unit according to claim 3, characterized in that the connection of the circulation space (59, 159, 183) to the atmosphere consists of an annular gap (45, 181) between the godet surface (43, 143) and a fixed cover collar (41, 141). Streckrollenaggregat nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Antriebsmotor (3) und die Galette (15) einen gemeinsamen miteinander verbundenen Zirkulationsraum (59) aufweisen oder dass der Antriebsmotor (103) und die Galette ( 115) zwei voneinander unabhängige Zirkulationsräume (159,183) für das Gas mit gemeinsamer oder separater Speisung (31, 131) aufweisen.Stretching roller unit according to one of claims 1 to 4, characterized in that the drive motor (3) and the godet (15) have a common interconnected circulation space (59) or that the drive motor (103) and the godet (115) have two independent circulation spaces (159,183) for the gas with common or separate feed (31, 131).
EP91810204A 1990-04-26 1991-03-22 Drafting roller unit Expired - Lifetime EP0454618B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1433/90 1990-04-26
CH143390 1990-04-26

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EP0454618B1 EP0454618B1 (en) 1994-05-18

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EP91810204A Expired - Lifetime EP0454618B1 (en) 1990-04-26 1991-03-22 Drafting roller unit

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EP (1) EP0454618B1 (en)
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DE (1) DE59101640D1 (en)

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WO2008098996A1 (en) * 2007-02-16 2008-08-21 Oerlikon Textile Gmbh & Co. Kg Galette
CN105543985A (en) * 2016-01-29 2016-05-04 佛山轻子精密测控技术有限公司 Gap-adjustable electrostatic-spinning nozzle and array-type spinning system

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CH692954A5 (en) * 1997-11-28 2002-12-31 Barmag Barmer Maschf Galette for conveying and guiding a running synthetic thread.
CN1272153A (en) * 1998-05-28 2000-11-01 巴马格股份公司 Godet roll for guiding, heating and conveying thread
DE19843990C1 (en) * 1998-09-25 1999-08-19 Dienes Apparatebau Gmbh Heated godet roller assembly for processing synthetic filaments and yarns
JP5269546B2 (en) * 2008-10-30 2013-08-21 株式会社ブリヂストン Conductive roller
DE102017009256A1 (en) * 2017-10-05 2019-04-11 Rpe Technologies Gmbh yarn treating
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US5763859A (en) * 1993-06-04 1998-06-09 Maschinenfabrik Rieter Ag Induction heating draw roller with vibration damping
WO2008098996A1 (en) * 2007-02-16 2008-08-21 Oerlikon Textile Gmbh & Co. Kg Galette
CN105543985A (en) * 2016-01-29 2016-05-04 佛山轻子精密测控技术有限公司 Gap-adjustable electrostatic-spinning nozzle and array-type spinning system

Also Published As

Publication number Publication date
EP0454618B1 (en) 1994-05-18
US5324905A (en) 1994-06-28
JPH04228643A (en) 1992-08-18
DE59101640D1 (en) 1994-06-23

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