EP0845196B1 - Galette for heating a running synthetic thread - Google Patents
Galette for heating a running synthetic thread Download PDFInfo
- Publication number
- EP0845196B1 EP0845196B1 EP97928210A EP97928210A EP0845196B1 EP 0845196 B1 EP0845196 B1 EP 0845196B1 EP 97928210 A EP97928210 A EP 97928210A EP 97928210 A EP97928210 A EP 97928210A EP 0845196 B1 EP0845196 B1 EP 0845196B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- godet
- carrier
- coil support
- transformer sheets
- primary windings
- 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.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/14—Tools, e.g. nozzles, rollers, calenders
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/14—Tools, e.g. nozzles, rollers, calenders
- H05B6/145—Heated rollers
-
- 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
Definitions
- the invention relates to a godet for heating a running synthetic Thread according to the preamble of claim 1.
- Such godets are known.
- US 3,508,024 is a godet for Heating a running thread is described which is more than two axially successively arranged stationary primary windings and one magnetically conductive godet sheath, which is concentric with the primary windings is rotatably mounted and which with the primary windings a narrow radial gap inductively connected to generate secondary currents is.
- the carrier of the primary windings is made of several layers Transformer sheets built up perpendicular to the axis of the coil carrier are attached.
- the primary windings are activated by means of a respective control circuit operated with an AC adjustable frequency, wherein the primary windings are enclosed in a resonant circuit, which on the set frequency is tuned. Via appropriate circuit breakers the resonant circuit is in cooperation with assigned temperature controllers depending on the measured temperature at the godet jacket or can be switched off.
- a similar godet is described in GB 989,349, in which one Primary winding on a concentric in a hollow cylindrical godet jacket arranged round beam is attached.
- the laminated iron sheets are arranged so that ring-shaped, radial concentric air gaps are formed to the godet axis of rotation.
- Another advantage is that commercially available cutting tape cores for Recording the windings can be used. That simplifies the Manufacturing process and reduces costs.
- the one between neighboring The gap forming the cutting tape cores leads to a very small stray field, that has no influence on the electricity generated and thus the temperature in the Has a godet.
- the surface shape of the groove base over which the carrier on the Coil carrier is arranged simplifies assembly.
- Thin transformer sheets required for high-frequency use can also be used up to a thickness of 0.01 mm can be used. Because the depth of penetration of the magnetic flux decreases with increasing frequency and the conduction of the magnetic flux, however, only on the surface takes place, such thin sheets are appropriate to the power loss to keep as low as possible.
- FIG. 1 In the case of an inductively heated godet shown in FIG. 1, several are axial Carrier 3 located on a coil carrier 5, each with a primary winding 1 provided.
- a godet casing 2 by means of a cone arrangement 7 clamped on a spindle 9 mounted in two bearings 8.
- the bearings 8 are supported on a fixed receiving body 11.
- the godet casing 2 is essentially U-shaped in cross section and has a central opening on its end wall 2a, which is from an im substantially cylindrical inward projection 13 is limited which has an inner cone 7 which is a cone of the spindle 9 fits.
- There is a thread on the free end of the spindle 9 which a nut 10 to fix the godet 2 on the Spindle 9 is attachable.
- From the receiving body 11 extends in Shape of a hollow cylinder a coil carrier 5 over the spindle 9 almost to End wall 2a of the godet casing 2.
- On the coil carrier 5 are in axial Direction of several carriers 3 one behind the other on the circumference of the coil carrier 5 arranged.
- the carriers 3 each have a groove base 3a and at a distance mutually arranged legs 3b, so that a U-shaped annular space is formed, which serves to receive the primary winding 1.
- the Legs 3b extend to just before the inner surface of the godet casing 2.
- Two adjacent legs 3b form with this inner lateral surface each have a defined radial gap 4 corresponding to the leg width Dimension.
- a corresponding control device (not shown) is used in the Carriers 3 arranged primary windings 1 separately controllable, so that a substantially constant temperature along the outer surface of the Godet casing 2 can be achieved.
- the rotating godet jacket 2 Via the annular gap 4 between the legs 3b and the inner surface of the godet casing 2, which is magnetic is conductive, the rotating godet jacket 2 is magnetically coupled, so that a voltage is induced in the godet jacket that one Current flow.
- the current flow in the godet jacket along the circumference has, due to the electrical resistance of the godet material, heating.
- By switching the coil voltage on and off the temperature in the godet jacket can be adjusted.
- To loss of performance especially when using high-frequency, for example 2 kHz and above are the transformer plates in the Groove base arranged so that they lie radially one above the other.
- FIG. 2 shows a locally enlarged sectional view of the groove base 3a, in which the transformer plates radially one above the other in the area of the groove base are stacked.
- the carrier 3 and 5 show a preferred exemplary embodiment, after the carrier 3 are formed so that the layered transformer sheets Are stacked in a U-shape into so-called cutting tape cores, i.e. the transformer plates are in the radial direction and not - as is generally known - Layered in the axial direction.
- the bobbin 5 On the circumference of the bobbin 5 are a plurality of U-shaped slit band cores 3 arranged in segments to form a plurality. The on the circumference of the bobbin in the circumferential direction without clearance mutually arranged segment-shaped cutting tape cores 3 thus form a winding support for a primary winding.
- the advantage of using of cut tape cores 3 is that the magnetic flux to the outside towards, in particular also towards the coil carrier 5, is shielded so that none Stray field can step out.
- the layered transformer sheets are used for this Stacked in a U-shape. This also creates an optimal magnetic flux enabled that does not have to cross any boundary layers.
- transformer sheets which are arranged one behind the other in the axial direction are at high-frequency application with, for example, 2 kHz thicker boundary layers causes, which lead to a considerable increase in resistance.
- the Surface of the groove base 3a, on which the step belt core 3 on the carrier 5 is either substantially flat or the surface of the Carrier 5 adapted and touches the surface of the carrier 5. The winding takes place in the circumferential direction.
- the free ends of the legs 3b of the cutting tape cores are rounded so that there is between the godet 2 and the free end of the legs 3b a substantially constant Radial gap 4 forms.
- the between adjacent cutting core 3 Forming gap 14 leads to a very small stray field that none Influence on the electricity generated and thus the temperature in the godet jacket 2 has.
- the core of the adjacent primary windings can be cut in this way offset from each other that axially around the width of the Form leg 3b delimited column 14.
- the groove base 3a of the carrier 3 is a hollow cylinder made of several transformer sheets stacked in the radial direction.
- the legs 3b of the wearer 3 have a plurality of axially stacked annular transformer plates. The between The radial stray field guided in the groove base 3a and the legs 3b is very large low, which is why no influence on the generated electricity and thus on the Temperature in the godet jacket 2 is present.
- FIG. 4B Another preferred exemplary embodiment is shown in FIG. 4B, in which the carrier 3 from separate legs 3b and a separate Groove base 3a exists.
- the groove base 3a of the carrier 3 is a hollow cylinder from several transformer sheets stacked in the radial direction.
- the legs 3b of the cutting tape core 3 have a plurality of stacked annular transformer sheets on.
- the axial between the groove base 3a and the legs 3b Stray field is very small, which has no effect on the electricity generated and so that it has the temperature in the godet casing 2.
- FIG. 4C Another preferred exemplary embodiment is shown in FIG. 4C, in which the carrier 3 from separate legs 3b and a separate Groove base 3a exists.
- the groove base 3a of the cutting tape core 3 is a Hollow cylinder made of several transformer sheets stacked in the radial direction.
- the Legs 3b of the carrier 3 have a plurality of stacked annular transformer sheets on. That guided between the groove base 3a and the legs 3b oblique stray field is very small, which is why no influence on the generated Current and thus the temperature in the godet jacket 2 is present.
- a shape of the leg 3b is shown, both with the The arrangement in FIG. 4A and also the arrangement in FIG. 4B can be combined is.
- the leg 3b is stacked from a plurality of annular transformer sheets. This arrangement is particularly low loss, since the radial gap 4 between the leg 3b and the godet casing 2 all the way around is carried out essentially constant. The stray magnetic flux is very low.
- FIG. 7 another form of the leg 3b is shown, both with the arrangement in FIG. 4A as well as the arrangement in FIG. 4B can be combined in which each ring-shaped transformer sheet is a star-shaped one Has outer edge.
- the transformer plates are stacked axially so that the star-shaped ones Outer edges are aligned axially one after the other.
- Fig. 8 is a possible attachment of the carrier 3 on the coil carrier 5, in which, for example, the cutting band cores are formed Carrier 3 each with at least one screw 6 on the coil carrier 5 the godet 2 are attached.
- U-shaped layered transformer sheets in particular Cut tape cores also have the advantage that those for high-frequency Application required thin sheets up to 0.01 mm can be. Since the depth of penetration of the magnetic flux with increasing frequency decreases and the power of the magnetic flux but only on the surface. are such thin sheets required in order to keep the power losses lower.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- General Induction Heating (AREA)
- Resistance Heating (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Description
Die Erfindung betrifft eine Galette zum Erhitzen eines laufenden synthetischen
Fadens gemäß Oberbegriff von Anspruch 1.The invention relates to a godet for heating a running synthetic
Thread according to the preamble of
Derartige Galetten sind bekannt. In der US 3,508,024 ist eine Galette zum Erhitzen eines laufenden Fadens beschrieben, welche mehr als zwei axial nacheinander angeordnete ortsfeste Primärwicklungen und einen magnetisch leitenden Galettenmantel aufweist, welcher konzentrisch zu den Primärwicklungen drehbar gelagert ist und welcher mit den Primärwicklungen über einen engen radialen Spalt zur Erzeugung von Sekundärströmen induktiv verbunden ist. Der Träger der Primärwicklungen ist aus mehreren geschichteten Trafoblechen aufgebaut, die senkrecht zu der Achse des Spulenträgers angebracht sind. Mittels jeweils einer Ansteuerschaltung werden die Primärwicklungen mit einem Wechselstrom einstellbarer Frequenz betrieben, wobei die Primärwicklungen in einen Schwingkreis eingeschlossen sind, welcher auf die eingestellte Frequenz abgestimmt ist. Über entsprechende Leistungsschalter in Zusammenarbeit mit zugeordneten Temperaturreglern ist der Schwingkreis in Abhängigkeit von der gemessenen Temperatur am Galettenmantel zu- bzw. abschaltbar.Such godets are known. In US 3,508,024 is a godet for Heating a running thread is described which is more than two axially successively arranged stationary primary windings and one magnetically conductive godet sheath, which is concentric with the primary windings is rotatably mounted and which with the primary windings a narrow radial gap inductively connected to generate secondary currents is. The carrier of the primary windings is made of several layers Transformer sheets built up perpendicular to the axis of the coil carrier are attached. The primary windings are activated by means of a respective control circuit operated with an AC adjustable frequency, wherein the primary windings are enclosed in a resonant circuit, which on the set frequency is tuned. Via appropriate circuit breakers the resonant circuit is in cooperation with assigned temperature controllers depending on the measured temperature at the godet jacket or can be switched off.
Eine ähnliche Galette ist in der GB 989,349 beschrieben, bei welcher eine Primärwicklung auf einem in einem hohlzylindrischen Galettenmantel konzentrisch angeordneten Rundträger befestigt ist. Wie in der US 3,508,024 sind alle ebenen Trafobleche des Trägers der Primärwicklung in axialer Richtung auf dem Spulenträger geschichtet. Bezüglich der Innenfläche des Galettenmantels sind die lamellierten Eisenbleche so angeordnet, daß ringförmige, zur Galettendrehachse radiale konzentrische Luftspalte gebildet werden.A similar godet is described in GB 989,349, in which one Primary winding on a concentric in a hollow cylindrical godet jacket arranged round beam is attached. As in US 3,508,024 all flat transformer sheets of the primary winding carrier in the axial direction layered on the bobbin. Regarding the inner surface of the godet casing the laminated iron sheets are arranged so that ring-shaped, radial concentric air gaps are formed to the godet axis of rotation.
Generell tritt bei derartigen beheizten Galetten das Problem auf, daß der Verlust des magnetischen Flusses nach außen, insbesondere zum Spulenträger hin ziemlich groß ist, da alle ebenen Trafobleche des Trägers der Primärwicklungen in axialer Richtung auf dem Spulenträger geschichtet sind. Auch ist der Magnetfluß in dem so kontruierten Träger nicht optimal, weil Grenzschichten durch axial hintereinander gefügte Trafobleche gebildet sind. Um diese Grenzschichten zu überwinden, wird eine bestimmte Energie benötigt, was einen Leistungsverlust verursacht. Insbesondere bei hochfrequenter Anwendung mit zum Beispiel 2 kHz und mehr erhöht sich der Leistungverlust wegen stärkerer Grenzschichten dramatisch.In general, the problem arises with such heated godets that the Loss of magnetic flux to the outside, especially to the coil carrier is quite large since all flat transformer plates of the primary winding support are layered in the axial direction on the coil carrier. Also the magnetic flux in the thus designed carrier is not optimal because of boundary layers are formed by transformer plates joined axially one behind the other. Around Overcoming these boundary layers requires a certain amount of energy which causes a loss of performance. Especially with high frequency For example, application with 2 kHz and more increases the power loss dramatically because of thicker boundary layers.
Es ist deshalb Aufgabe der Erfindung, eine heizbare Galette der oben umrissenen Art zu schaffen, welche einen optimalen Magnetfluß in der Galette durch Verhinderung eines Streufeldes innerhalb des Galettenmantels, insbesondere in dem Bereich der Nutgründe des Trägers und durch Verringerung des durch Grenzschichten verursachten Leistungsverlustes ermöglicht.It is therefore an object of the invention to provide a heatable godet of the above outlined type to create an optimal magnetic flux in the Godet by preventing a stray field within the godet casing, especially in the area of the wearer's groove bases and by reduction the loss of performance caused by boundary layers.
Diese Aufgabe wird durch eine Galette mit den Merkmalen gemäß Anspruch 1 gelöst. Zweckmäßige Weiterbildungen sind in den abhängigen Ansprüchen definiert.This task is performed by a godet with the features according to claim 1 solved. Appropriate developments are in the dependent claims Are defined.
Da der magnetische Fluß, insbesondere zum Spulenträger hin, abgeschirmt ist, wird verhindert, daß ein Streufeld nach außen treten kann. Damit wird zusätzlich ein optimaler Magnetfluß ermöglicht, der keine Grenzschichten überwinden muß und nicht zu beheizende Abschnitte wirksam abschirmt. Because the magnetic flux, especially towards the coil carrier, is shielded is prevented that a stray field can escape to the outside. So that will In addition, an optimal magnetic flux enables no boundary layers must overcome and effectively shields sections not to be heated.
Die besondere Konstruktion und Anordnung der Trafobleche gewährleisten ein besseres Erhitzen des Galettenmantels, weil das Streufeld innerhalb der Galette erheblich verringert ist.Ensure the special construction and arrangement of the transformer sheets better heating of the godet, because the stray field inside the Galette is significantly reduced.
Ein weiterer Vorteil liegt darin, daß handelsübliche Schnittbandkerne zur Aufnahme der Wicklungen verwendet werden können. Das vereinfacht den Herstellungsprozeß und reduziert die Kosten. Der sich zwischen benachbarten Schnittbandkernen bildende Spalt führt nur zu einem sehr geringen Streufeld, das keinen Einfluß auf den erzeugten Strom und damit die Temperatur im Galettenmantel hat.Another advantage is that commercially available cutting tape cores for Recording the windings can be used. That simplifies the Manufacturing process and reduces costs. The one between neighboring The gap forming the cutting tape cores leads to a very small stray field, that has no influence on the electricity generated and thus the temperature in the Has a godet.
Die Oberflächenform des Nutgrundes, über welche der Träger auf dem Spulenträger angeordnet ist, vereinfacht die Montage.The surface shape of the groove base over which the carrier on the Coil carrier is arranged, simplifies assembly.
Auch können für die hochfrequente Anwendung erforderliche dünne Trafobleche bis zu einer Dicke von 0,01 mm eingesetzt werden. Da die Eindringtiefe des magnetischen Flusses mit zunehmender Frequenz abnimmt und die Leitung des magnetischen Flusses jedoch ausschließlich an der Oberfläche erfolgt, sind derart dünne Bleche zweckmäßig, um die Verlustleistung möglichst gering zu halten.Thin transformer sheets required for high-frequency use can also be used up to a thickness of 0.01 mm can be used. Because the depth of penetration of the magnetic flux decreases with increasing frequency and the conduction of the magnetic flux, however, only on the surface takes place, such thin sheets are appropriate to the power loss to keep as low as possible.
Weitere Vorteile, Merkmale und Anwendungsmöglichkeiten der Erfindung werden nun anhand eines Ausführungsbeispiels unter Bezugnahme auf die beigefügten Zeichnungen näher erläutert. Es zeigen:
- Fig. 1
- eine Schnittansicht durch eine induktiv beheizte Galette;
- Fig. 2
- eine vergrößerte Darstellung des Nutgrunds gemäß Bereich A in Fig. 1;
- Fig. 3
- eine Ausführungsform des Trägers gemäß Bereich B in Fig. 1, der mehrere U-förmig ineinander gestapelte Trafobleche aufweist;
- Fig. 4A, 4B und 4C
- weitere Ausführungsformen des Schnittbandkerns gemäß Bereich B in Fig. 1, der aus separaten Schenkeln und einem separaten Nutgrund besteht;
- Fig. 5
- eine Schnittansicht durch die Galette gemäß Fig. 1, wobei die Anordnung von mehreren segmentartigen Schnittbandkernen auf dem Umfang des Trägers gezeigt ist;
- Fig. 6
- eine Schnittansicht durch die Galette gemäß Fig. 1, und Fig. 4A
oder 4B oder 4C, wobei ein ringförmiger
separater Schenkel 3b dargestellt ist; - Fig. 7
- eine Schnittansicht ähnlich Fig. 6, wobei jedoch der
dargestellte Schenkel 3b sternförmig ausgebildet ist; und - Fig. 8
- eine Teilansicht, wobei die Befestigung des Schnittbandkerns auf dem Träger gezeigt ist.
- Fig. 1
- a sectional view through an inductively heated godet;
- Fig. 2
- an enlarged view of the groove base according to area A in Fig. 1;
- Fig. 3
- an embodiment of the carrier according to area B in Figure 1, which has a plurality of U-shaped stacked transformer sheets.
- Figures 4A, 4B and 4C
- further embodiments of the cutting tape core according to area B in FIG. 1, which consists of separate legs and a separate groove base;
- Fig. 5
- a sectional view through the godet of Figure 1, showing the arrangement of a plurality of segment-like tape cores on the circumference of the carrier.
- Fig. 6
- 2 shows a sectional view through the godet according to FIG. 1 and FIG. 4A or 4B or 4C, an annular
separate leg 3b being shown; - Fig. 7
- a sectional view similar to Figure 6, but with the
leg 3b shown is star-shaped; and - Fig. 8
- a partial view, wherein the attachment of the cutting tape core is shown on the carrier.
Bei einer in Fig. 1 gezeigten induktiv beheizten Galette sind mehrere axial
auf einem Spulenträger 5 befindliche Träger 3 mit jeweils einer Primärwicklung
1 vorgesehen. Dabei ist ein Galettenmantel 2 mittels einer Konusanordnung
7 auf einer in zwei Lagern 8 gelagerten Spindel 9 aufgespannt.
Die Lager 8 sind an einem feststehenden Aufnahmekörper 11 abgestützt. Der
Galettenmantel 2 ist im Querschnitt im wesentlichen U-förmig ausgebildet
und besitzt an seiner Stirnwand 2a eine mittige Öffnung, die von einem im
wesentlichen zylindrischen einwärts gerichteten Ansatz 13 begrenzt ist,
welcher einen Innenkonus 7 aufweist, welcher zu einem Konus der Spindel
9 paßt. An dem freien Ende der Spindel 9 befindet sich ein Gewinde, auf
welchem eine Mutter 10 zur Festlegung des Galettenmantels 2 auf der
Spindel 9 befestigbar ist. Von dem Aufnahmekörper 11 erstreckt sich in
Form eines Hohlzylinders ein Spulenträger 5 über die Spindel 9 fast bis zur
Stirnwand 2a des Galettenmantels 2. Auf dem Spulenträger 5 sind in axialer
Richtung mehrere Träger 3 hintereinander am Umfang des Spulenträgers 5
angeordnet. Die Träger 3 weisen jeweils einen Nutgrund 3a und in Abstand
voneinander angeordnete Schenkel 3b auf, so daß ein U-förmiger Ringraum
gebildet wird, welcher zur Aufnahme der Primärwicklung 1 dient. Die
Schenkel 3b erstrecken sich bis kurz vor der Innenfläche des Galettenmantels
2. Zwei benachbarte Schenkel 3b bilden mit dieser inneren Mantelfläche
jeweils einen definierten Radialspalt 4 einer der Schenkelbreite entsprechenden
Abmessung.In the case of an inductively heated godet shown in FIG. 1, several are
Über eine entsprechende Steuereinrichtung (nicht gezeigt) sind die in den
Trägern 3 angeordneten Primärwicklungen 1 separat steuerbar, so daß eine
im wesentlichen konstante Temperatur längs der äußeren Oberfläche des
Galettenmantels 2 erzielbar ist. Über die Ringspalte 4 zwischen den Schenkel
3b und der inneren Mantelfläche des Galettenmantels 2, welcher magnetisch
leitend ist, ist der rotierende Galettenmantel 2 magnetisch gekoppelt,
so daß eine Spannung in dem Galettenmantel induziert wird, der einen
Stromfluß zur Folge hat. Der Stromfluß im Galettenmantel längs des Umfangs
hat, bedingt durch den elektrischen Widerstand des Galettenmaterials,
eine Erwärmung zur Folge. Durch gezieltes Zu- und Abschalten der Spulenspannung
kann somit die Temperatur im Galettenmantel eingestellt werden.
Um Leistungsverluste insbesondere bei hochfrequenter Anwendung von beispielsweise
2 kHz und darüber zu verhindern, sind die Trafobleche im
Nutgrund so angeordnet, daß sie radial übereinander liegen. A corresponding control device (not shown) is used in the
In Fig. 2 ist eine lokal vergrößerte Schnittansicht des Nutgrunds 3a dargestellt,
in welcher die Trafobleche im Bereich des Nutgrunds radial übereinander
gestapelt sind.2 shows a locally enlarged sectional view of the
In Fig. 3 und Fig. 5 ist ein bevorzugtes Ausführungsbeispiel dargestellt,
nach dem die Träger 3 so gebildet sind, daß die geschichteten Trafobleche
U-förmig ineinander zu sogenannten Schnittbandkernen gestapelt sind, d.h.,
die Trafobleche sind in radialer Richtung und nicht - wie allgemein bekannt
- in axialer Richtung geschichtet. Auf dem Umfang des Spulenträgers 5 sind
mehrere U-förmigen Schittbandkerne 3 segmentförmig zu mehreren angeordnet.
Die am Umfang des Spulenträgers in Umfangsrichtung ohne Abstand
zueinander angeordneten segmentförmigen Schnittbandkerne 3 bilden somit
einen Wicklungsträger für eine Primärwicklung. Der Vorteil der Verwendung
von Schnittbandkernen 3 liegt darin, daß der magnetische Fluß nach außen
hin, insbesondere auch zum Spulenträger 5 hin, abgeschirmt ist, so daß kein
Streufeld nach außen treten kann. Hierzu sind die geschichteten Trafobleche
U-förmig ineinander gestapelt. Damit wird zusätzlich ein optimaler Magnetfluß
ermöglicht, der keine Grenzschichten überwinden muß. Bei Trafoblechen,
die in axialer Richtung hintereinander angeordnet sind, werden bei
hochfrequenter Anwendung mit zum Beispiel 2 kHz stärkere Grenzschichten
verursacht, die zu einer erheblichen Erhöhung des Widerstandes führen. Die
Oberfläche des Nutgrunds 3a, auf den der Schittbandkern 3 auf dem Träger
5 angeordnet ist, ist entweder im wesentlichen eben oder der Oberfläche des
Trägers 5 angepaßt und berührt die Oberfläche des Trägers 5. Die Wicklung
erfolgt in Umfangsrichtung. Die freien Enden der Schenkel 3b der Schnittbandkerne
sind derart abgerundet, so daß sich zwischen dem Galettenmantel
2 und dem freien Ende der Schenkel 3b ein im wesentlichen konstanter
Radialspalt 4 ausbildet. Der sich zwischen benachbarten Schnittbandkernen 3
bildende Spalt 14 führt nur zu einem sehr geringen Streufeld, das keinen
Einfluß auf den erzeugten Strom und damit die Temperatur im Galettenmantel
2 hat. Um die durch das Streufeld verursachten Verluste zu minimieren,
können die Schnittbandkerne der benachbarten Primärwicklungen derart
versetzt zueinander angeordnet werden, daß sich axial um die Breite der
Schenkel 3b begrenzte Spalte 14 ausbilden.3 and 5 show a preferred exemplary embodiment,
after the
In Fig. 4A ist ein bevorzugtes Ausführungsbeispiel dargestellt, in welchem
der Träger 3 aus separaten Schenkeln 3b und einem separaten Nutgrund 3a
besteht. Der Nutgrund 3a des Trägers 3 ist ein Hohlzylinder aus mehreren
in radialer Richtung gestapelten Trafoblechen. Die Schenkel 3b des Trägers
3 weisen mehrere axial gestapelte ringförmige Trafobleche auf. Das zwischen
dem Nutgrund 3a und den Schenkeln 3b geführte radiale Streufeld ist sehr
gering, weshalb kein Einfluß auf den erzeugten Strom und damit auf die
Temperatur in dem Galettenmantel 2 vorhanden ist.4A shows a preferred embodiment, in which
the
In Fig. 4B ist ein anderes bevorzugtes Ausführungsbeispiel dargestellt, in
welchem der Träger 3 aus separaten Schenkeln 3b und einem separaten
Nutgrund 3a besteht. Der Nutgrund 3a des Trägers 3 ist ein Hohlzylinder
aus mehreren in radialer Richtung gestapelten Trafoblechen. Die Schenkel 3b
des Schnittbandkerns 3 weisen mehrere gestapelte ringförmige Trafobleche
auf. Das zwischen dem Nutgrund 3a und den Schenkeln 3b geführte axiale
Streufeld ist sehr gering, was keinen Einfluß auf den erzeugten Strom und
damit auf die Temperatur in dem Galettenmantel 2 hat.Another preferred exemplary embodiment is shown in FIG. 4B, in
which the
In Fig. 4C ist ein anderes bevorzugtes Ausführungsbeispiel dargestellt, in
welchem der Träger 3 aus separaten Schenkeln 3b und einem separaten
Nutgrund 3a besteht. Der Nutgrund 3a des Schnittbandkerns 3 ist ein
Hohlzylinder aus mehreren in radialer Richtung gestapelten Trafoblechen. Die
Schenkel 3b des Trägers 3 weisen mehrere gestapelte ringförmige Trafobleche
auf. Das zwischen dem Nutgrund 3a und den Schenkeln 3b geführte
schräge Streufeld ist sehr gering, weshalb kein Einfluß auf den erzeugten
Strom und damit auf die Temperatur in dem Galettenmantel 2 vorliegt.Another preferred exemplary embodiment is shown in FIG. 4C, in
which the
In Fig. 6 ist eine Form des Schenkels 3b gezeigt, die sowohl mit der
Anordnung in Fig. 4A als auch mit der Anordnung in Fig. 4B kombinierbar
ist. Der Schenkel 3b ist aus mehreren ringförmigen Trafoblechen gestapelt.
Diese Anordnung ist besonders verlustarm, da der Radialspalt 4 zwischen
dem Schenkel 3b und dem Galettenmantel 2 ohne Unterbrechungen umlaufend
im wesentlichen konstant ausgeführt ist. Der magnetische Streufluß
ist dabei sehr gering.In Fig. 6 a shape of the
In Fig. 7 ist eine andere Form des Schenkels 3b gezeigt, die sowohl mit
der Anordnung in Fig. 4A als auch mit der Anordnung in Fig. 4B kombinierbar
ist, in welcher jedes ringförmige Trafoblech einen sternförmigen
Außenrand aufweist. Die Trafobleche sind so axial gestapelt, daß die sternfömigen
Außenränder axial nacheinander ausgerichtet sind.In Fig. 7 another form of the
In Fig. 8 ist eine mögliche Befestigung des Trägers 3 auf dem Spulenträger
5 dargestellt, in welcher beispielsweise die als Schnittbandkerne ausgebildeten
Träger 3 jeweils mit zumindest einer Schraube 6 auf dem Spulenträger 5
der Galette 2 befestigt sind.In Fig. 8 is a possible attachment of the
Die Anwendungen von U-förmig geschichteten Trafoblechen insbesondere der Schnittbandkernen besitzen des weiteren den Vorteil, daß die für die hochfrequente Anwendung erforderlichen dünnen Bleche bis zu 0,01 mm eingesetzt werden können. Da die Eindringtiefe des magnetischen Flusses mit zunehmender Frequenz abnimmt und die Leistung des magnetischen Flusses jedoch ausschließlich an der Oberfläche erfolgt. sind derart dünne Bleche erforderlich, um die Leistungsverluste geringer zu halten.The applications of U-shaped layered transformer sheets, in particular Cut tape cores also have the advantage that those for high-frequency Application required thin sheets up to 0.01 mm can be. Since the depth of penetration of the magnetic flux with increasing frequency decreases and the power of the magnetic flux but only on the surface. are such thin sheets required in order to keep the power losses lower.
Claims (12)
- Godet for heating an advancing synthetic filament yarn, the godet comprising a plurality of stationary primary windings (1) and with respect thereto a magnetically conductive, rotatably supported godet jacket (2), each of the primary windings (I) being wound on at least one U-shaped carrier (3) consisting of a plurality of transformer sheets, the U-shaped carriers being arranged concentric with godet jacket (2), one following the other on a coil support (5), and the godet jacket (2) being coupled via side walls (3b) of carrier (3) with the primary windings (1) respectively via a defined radial clearance (4) for generating induced currents, wherein the carrier (3) is constructed such that its transformer sheets overlie one another radially in the region of a channel bottom (3a) and are aligned in axial direction of the coil support (5), and that its transformer sheets axially follow one another in the region of side walls (3b) and are aligned in radial direction of the coil support (5), characterized in that the carrier (3) comprises a plurality of transformer sheets stacked into one another in U-shape.
- Godet as defined in claim 1, characterized in that the carrier (3) comprises separate side walls (3b) and a separate channel bottom (3a).
- Godet as in claim 2, characterized in that the separate channel bottom (3a) is a hollow cylinder consisting of a plurality of transformer sheets stacked in radial direction.
- Godet as defined in claim 2, characterized in that each separate side wall (3b) comprises a plurality of axially stacked, annular transformer sheets.
- Godet as defined in claim 2, characterized in that each separate side wall (3b) comprises a plurality of axially stacked, star-shaped transformer sheets.
- Godet as defined in claim 1, characterized in that a plurality of carriers (3) is arranged in the form of segments over the circumference of the coil support (5), so as to receive one of the primary windings (1).
- Godet as defined in claim 6, characterized in that the channel bottom (3a) of the segment-shaped carriers (3) is substantially flat and contacts the surface of coil carrier (5).
- Godet as defined in claim 6 or 7, characterized in that the side walls (3b) of the segment-shaped carriers (3) are made arcuate at their free ends, so that a substantially constant radial clearance (4) results between the carrier (3) and the godet jacket (2).
- Godet as defined in claim 6, characterized in that the outer surface of the channel bottom (3a) above which the carrier (3) is arranged on coil support (5) is adapted to the surface of the coil support (5).
- Godet as defined in one of claims 6-9, characterized in that the segment-shaped carriers (3) of adjacent primary windings (1) are arranged over the circumference of coil support (5) offset from one another in the axial direction of coil support (5).
- Godet as defined in one of claims 1-10, characterized in that each of the carriers (3) is mounted on the coil support (5) by means of at least one screw (6).
- Godet as defined in one of claims 1-11, characterized in that the transformer sheets have a thickness as small as 0.01mm.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19624266 | 1996-06-18 | ||
| DE19624266 | 1996-06-18 | ||
| PCT/EP1997/003121 WO1997049265A1 (en) | 1996-06-18 | 1997-06-16 | Galette for heating a running synthetic thread |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0845196A1 EP0845196A1 (en) | 1998-06-03 |
| EP0845196B1 true EP0845196B1 (en) | 2002-11-27 |
| EP0845196B2 EP0845196B2 (en) | 2011-07-06 |
Family
ID=7797255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97928210A Expired - Lifetime EP0845196B2 (en) | 1996-06-18 | 1997-06-16 | Galette for heating a running synthetic thread |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5970592A (en) |
| EP (1) | EP0845196B2 (en) |
| KR (1) | KR100446346B1 (en) |
| CN (1) | CN1135908C (en) |
| DE (1) | DE59708815D1 (en) |
| TW (1) | TW354339B (en) |
| WO (1) | WO1997049265A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1614783A1 (en) * | 2004-07-06 | 2006-01-11 | Schärer Schweiter Mettler AG | Inductor core for a heatable galette |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7105784B2 (en) * | 2003-03-24 | 2006-09-12 | Kabushiki Kaisha Toshiba | Fixing device |
| US6861627B2 (en) * | 2003-03-26 | 2005-03-01 | Kabushiki Kaisha Toshiba | Induction heat fixing device |
| EP1805358B1 (en) * | 2004-10-14 | 2011-03-23 | Oerlikon Textile GmbH & Co. KG | Galette for guiding, heating and transporting a thread |
| PL2020160T3 (en) * | 2006-04-24 | 2018-01-31 | Inductoheat Inc | Electric induction heat treatment of an end of tubular material |
| CN101431884B (en) * | 2008-12-11 | 2013-03-20 | 马嘉惠 | Electromagnetic shielding device matched with radio frequency focusing heating mechanism |
| CN115198419B (en) * | 2022-08-12 | 2023-09-26 | 昆山联滔电子有限公司 | Braided wire hot press |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB858855A (en) * | 1956-05-15 | 1961-01-18 | Wild Barfield Electr Furnaces | Induction heated rotary rollers |
| NL283604A (en) * | 1961-09-26 | 1900-01-01 | ||
| GB1121860A (en) * | 1964-11-21 | 1968-07-31 | Tokushu Denki Kabushiki Kaisha | A heating rotary drum apparatus |
| BE716725A (en) * | 1965-12-03 | 1968-12-02 | ||
| US3412229A (en) * | 1966-10-20 | 1968-11-19 | Cameron Brown Capital Corp | Electric heating means |
| RO55797A (en) * | 1967-08-16 | 1974-01-03 | ||
| DE1660235C3 (en) * | 1967-08-16 | 1980-06-26 | Barmag Barmer Maschinenfabrik Ag, 5600 Wuppertal | Induction heatable galette |
| US3448233A (en) * | 1967-09-26 | 1969-06-03 | Pillar Corp | Induction heating assembly |
| US3508024A (en) * | 1968-06-17 | 1970-04-21 | Gen Electric | Dual inductance induction heater |
| BE736709A (en) * | 1968-10-24 | 1969-12-31 | ||
| US3562472A (en) † | 1969-08-20 | 1971-02-09 | Gen Electric | Induction heater for rotating godet |
| GB1319318A (en) * | 1970-07-01 | 1973-06-06 | Platt International Ltd | Inductively heatable roller having a temperature sensor |
| JPS6139394A (en) * | 1984-07-30 | 1986-02-25 | トクデン株式会社 | 3-phase annular laminated core leg type rotary roller |
| US5159166A (en) * | 1988-06-30 | 1992-10-27 | Rieter Machine Works, Ltd. | Drawroll unit |
| DE58909654D1 (en) * | 1988-06-30 | 1996-05-23 | Rieter Ag Maschf | Wide speed range godet |
| DE59202786D1 (en) * | 1991-04-27 | 1995-08-10 | Barmag Barmer Maschf | Galette for heating a running thread. |
| DE4339903A1 (en) * | 1992-12-03 | 1994-06-09 | Barmag Barmer Maschf | Induction heated conical godet roller for yarn - has cylindrical induction coil core with varying length projections on inside of shell |
| CH690599A5 (en) * | 1994-11-10 | 2000-10-31 | Barmag Barmer Maschf | Galette for heating and conveying threads. |
-
1997
- 1997-06-16 EP EP97928210A patent/EP0845196B2/en not_active Expired - Lifetime
- 1997-06-16 CN CNB971907315A patent/CN1135908C/en not_active Expired - Fee Related
- 1997-06-16 KR KR10-1998-0700959A patent/KR100446346B1/en not_active IP Right Cessation
- 1997-06-16 WO PCT/EP1997/003121 patent/WO1997049265A1/en active IP Right Grant
- 1997-06-16 DE DE59708815T patent/DE59708815D1/en not_active Expired - Lifetime
- 1997-06-16 US US09/011,848 patent/US5970592A/en not_active Expired - Fee Related
- 1997-06-18 TW TW086108517A patent/TW354339B/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1614783A1 (en) * | 2004-07-06 | 2006-01-11 | Schärer Schweiter Mettler AG | Inductor core for a heatable galette |
| US7170386B2 (en) | 2004-07-06 | 2007-01-30 | Schärer Schweiter Mettler Ag | Inductor core for heatable godet roll |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1997049265A1 (en) | 1997-12-24 |
| DE59708815D1 (en) | 2003-01-09 |
| EP0845196A1 (en) | 1998-06-03 |
| EP0845196B2 (en) | 2011-07-06 |
| TW354339B (en) | 1999-03-11 |
| KR100446346B1 (en) | 2004-10-14 |
| CN1135908C (en) | 2004-01-21 |
| US5970592A (en) | 1999-10-26 |
| CN1196864A (en) | 1998-10-21 |
| KR19990036291A (en) | 1999-05-25 |
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