JP4221227B2 - Godet - Google Patents

Description

  The present invention relates to a godet for guiding, heating and transporting a yarn of the type described in the superordinate conception of claim 1.

  This type of godet is known from EP 0 707 719 A1.

  This known godet has a godet peripheral wall that is rotatably supported, and one or many yarns are guided on the outer peripheral surface of the godet peripheral wall. The godet peripheral wall is formed in a hollow cylindrical shape, and is supported by a protruding support body through a number of magnet bearings. A heating device for heating the godet peripheral wall is disposed next to the magnet bearing in an annular chamber formed between the support and the godet peripheral wall. Such an arrangement basically has the disadvantage that the function of the godet is significantly disturbed. Since the godet peripheral wall is only heated inadequately in the region of the magnet bearing, the thread or threads are guided in the central area of the godet peripheral wall in order to heat-treat the thread or threads. Thereby, a very long protruding godet is required in order to process, for example, ten yarns extending parallel to each other which are guided by a large number of windings through the godet peripheral wall. However, this places excessive demands on the bearing section of the godet wall.

  Therefore, the object of the present invention is to improve the godet of the type described at the beginning, so that the godet peripheral wall can be heated uniformly without seriously affecting the magnetic bearing of the godet peripheral wall. Is to provide things.

  According to the invention, this problem has been solved by a godet having the features described in claim 1.

  Advantageous embodiments of the invention are described in the dependent claims.

The present invention is characterized in that the bearing region of the godet peripheral wall can be directly heated. According to the present invention, the possibility is provided that the coil support can be arranged up to the end of the godet peripheral wall. For this purpose, the coil of the heating device and at least one bearing pole winding of the magnet bearing are configured in the support so that the magnetic flux of the coil at least partially covers the bearing pole winding. Thereby, in the reference plane of the godet peripheral wall, at least two or many magnetic fluxes that overlap, overlap or cross each other are generated. The first magnetic flux is generated by a coil support having a coil of the heating device, which is hereinafter referred to as thermal flux. This flux is Godet Tsu preparative inner peripheral wall, causing a induction heating the godet wall directly. The second magnetic flux is generated by the bearing pole winding of the magnet bearing and is used to form a magnetic bearing force that supports the godet peripheral wall. In this case, the two magnetic fluxes act in the same direction radially outward in the godet peripheral wall, or act radially outward and inward in opposite directions. Since the minimum air gap can be adjusted by the advantageous overlap of the magnetic flux extending in the axial direction, in the radial direction or in both directions, heating with less loss of the godet wall is possible in the bearing plane.

  In a very compact structural form with a small structural space in the godet peripheral wall, in order to enable heating and support of the godet peripheral wall, according to an advantageous embodiment of the invention, the coil and the bearing pole winding are axial They are arranged side by side. However, the coil and the bearing pole winding may be arranged one above the other. Such a configuration according to the invention is particularly advantageous in the direction of reverse action of the magnetic flux, for example to magnetically support a shaft connected to the godet peripheral wall.

  In a particularly advantageous embodiment, a receiving part is formed by the coil support for receiving at least one or a number of bearing pole windings of the magnet bearing. This provides the possibility of creating bearing flux in the thermal flux so that the flux does not affect each other.

  On the one hand, in order to achieve a heat flux that is as low as possible and unobstructed, up to the desired location of the godet wall (to be heated), and on the other hand it accepts one or many bearing pole windings. In order to be able to do this, according to an advantageous embodiment of the invention, the coil support is provided with two legs protruding radially until just before the inside of the godet peripheral wall for guiding the thermal flux. It has been proposed to form with the provided cross-sectional shape. In this case, the coil and the bearing pole winding are arranged side by side between the legs.

  Receiving the bearing pole windings of the magnet bearing in the molded coil support can basically be performed in two ways. In a first variant formed by the advantageous embodiment of the invention as defined in claim 5, the bearing pole windings and the coils are arranged axially side by side in the coil support. For this purpose, the coil support is configured in a U-shape with two legs of the same length that end directly in front of the godet peripheral wall with a small gap. In this case, the bearing magnetic flux generated by the bearing pole winding is directly guided in the godet peripheral wall. In this case, the bearing pole winding is surrounded by the thermal magnetic flux. The coil and the bearing pole winding are held in the groove bottom of the coil support.

  In order to avoid the influence of heat fluxes and bearing magnetic fluxes that are generated in some cases, according to an advantageous embodiment as claimed in claim 6, a thin metal plate (Bleching) is assigned to the bearing pole winding. Is fixed inside the godet wall. As a result, the bearing pole winding and the sheet metal work together to guide the bearing flux directly. The magnetic flux is further divided by the shielding means between the metal thin plate and the godet peripheral wall. Another advantage of the embodiment as claimed in claim 6 is that the bearing losses caused, for example, by magnetisation reversal are significantly reduced, thereby producing a small braking moment in the magnet bearing.

  In a second basic variant embodiment for receiving the bearing pole winding, the godet is constructed in accordance with the embodiment as claimed in claim 7. For this purpose, the legs of the coil support are configured with different lengths, so that the coil is arranged in the coil support and the bearing pole windings are arranged in the axial direction outside the coil support. Yes. In this embodiment, the bearing pole winding acts inward and thus acts against the magnetic field produced by the coil. In order to guide the bearing magnetic flux, the boss connected to the godet peripheral wall is located facing the bearing pole winding, so that a bearing gap is formed between the boss and the bearing pole winding.

  In order to reduce the heat loss in the godet peripheral wall at the free end, and thus make the entire length of the godet peripheral wall available for yarn winding, according to an advantageous embodiment as claimed in claim 8, The coil support is a free end of the support, and has a leg protruding in the radial direction just before the inside of the godet peripheral wall and a leg for guiding the thermal magnetic flux protruding in the axial direction just before the inside of the end wall. ing. This heats the edge region of the end wall.

  According to a particularly advantageous embodiment of the invention as set forth in claim 9, magnetic stray losses between the coil and the bearing pole winding or the coil support and the bearing pole winding, or losses during feeding are avoided. It is done. For this purpose, the bearing pole winding has an insulating part which acts on the coil support and / or the coil.

  The superimposition of the magnetic flux can be performed regardless of the direction of the magnetic flux flow of the magnetic flux. Thereby, the extreme parts of the bearing pole windings are arranged facing each other in the axial direction or facing each other in the radial direction.

  The godet is advantageously characterized in that if the coil support is configured rotationally symmetrical to receive one or many coils and extends around the entire circumference of the support. It is comprised. In this case, a large number of bearing pole windings are received by the coil support, and the bearing pole windings are arranged at different angles in the bearing plane. Thereby, all bearing pole windings of the magnet bearing can advantageously be incorporated into the coil support.

  In order to be able to use as much as possible the thread winding length of the godet peripheral wall for thermally treating the yarn, according to an advantageous embodiment, the godet peripheral wall is at the free end of the support. It is supported by the arranged magnetic bearing and by the clamped end of the support. In this case, a coil support comprising at least one coil is provided at each end of the support, which additionally supports one or more bearing pole windings of a magnet bearing. Accept. Thereby, the bearing pole peripheral wall of the magnet bearing can be heated into the end region without affecting the bearing.

  In this case, the bearing pole winding of the magnet bearing formed at the free end of the support is advantageously arranged with its extreme inward in the radial direction, so that the extreme of the bearing pole winding A bearing gap is formed between the godet and the boss connected to the peripheral wall.

  On the other hand, the bearing pole winding of the magnet bearing formed at the clamped end of the support is preferably radially outward, with a bearing gap between the godet peripheral wall and the extreme part of the bearing pole winding. Arranged to form. Thereby, the hollow bearing stability of the godet peripheral wall is obtained.

  In a particularly advantageous embodiment of the invention as defined in claim 15, a sensor is assigned to each bearing pole winding for determining the position of the godet peripheral wall and thus for monitoring the bearing gap. Thereby, the bearing pole windings can be controlled individually or in groups by the control device.

  In order to receive the axial force, the godet peripheral wall is supported by an additional axial bearing (axial bearing). However, the axial bearing may be formed by a rolling bearing in the axial or radial construction format.

  In order to guarantee emergency travel of the godet peripheral wall, at least one gripping bearing (Fanglager) is provided, which gripping bearing is connected as a contactless radial bearing (radial bearing) or elastically during normal operation It may be configured as a radial bearing.

  An embodiment of a godet according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic longitudinal sectional view of a first embodiment of a godet according to the present invention,
2 is a cross-sectional view taken along line AA of the godet shown in FIG.
3 and 4 are schematic cross-sectional views of the front end of the inventive godet according to two alternative embodiments,
FIG. 5 is a schematic cross-sectional view of a godet of the present invention according to another embodiment,
6 is a cross-sectional view taken along line AA of the embodiment shown in FIG.

  1 and 2 schematically show a first embodiment of a godet according to the invention. FIG. 1 shows a section of the godet that is important to the invention in a cross-sectional view parallel to and extending through the axis of rotation of the godet, and FIG. 2 shows the rotation of the godet. A schematic cross-sectional view perpendicular to the axis is shown. Thus, unless otherwise limited, the following description applies to the two drawings.

  The embodiment of the godet of the present invention has a godet peripheral wall 1, and this godet peripheral wall 1 is connected to a drive shaft 3 extending inside the godet peripheral wall 1 through an end wall 2 so as not to be relatively rotatable. Yes. For this purpose, a fastening element 7 for fixing the godet peripheral wall 1 is provided at the end of the drive shaft 3. The drive shaft 3 is connected to a drive device (not shown) at the end opposite to the tightening element 7. In this case, for example, an electric motor is provided as a driving device.

  The godet peripheral wall 1 is supported on the protruding support 4 by two magnet bearings 6.1 and 6.2 acting in the radial direction. The support 4 is formed in a hollow cylindrical shape and extends in the godet peripheral wall 1 to a position immediately before the end wall 2. On the side opposite to the hollow cylindrical end wall 2, the support 4 is fixed to a machine frame (not shown) via a collar 5.

  A heating device 8 is disposed in an annular chamber formed between the godet peripheral wall 1 and the support 4. The heating device 8 has a large number of coil supports 9.1 to 9.4, and these coil supports are fixed to the support in the circumferential direction and the longitudinal direction. Each of the coil supports 9.1 to 9.4 supports one coil 10. For this purpose, the windings of the coils 10 are inserted into a large number of coil supports 9 arranged in series around the outer peripheral surface of the support 4 or into a rotationally symmetrical coil support 9. . The coil 10 is connected to the energy supply unit 26.

  In order to receive the magnet bearings 6.1 and 6.2, the coil supports 9.1 and 9.4 are connected to the free end of the support 4 and the clamped end of the support 4 respectively. The bearing pole winding 11 of the magnet bearing 6 is embedded in the receiving portion 16. For this purpose, the coil support 9.1 arranged at the free end of the support 4 is configured in a U-shape. The coil support 9.1 is fixed to the support 4 by this shape provision. The leg 14 of the coil support body 9.1 protrudes upward in the radial direction, and ends with a short interval before the inside of the godet peripheral wall 1. In this case, the coil support 9.1 is configured in a segment shape, and therefore the coil support 9.1 extends over a slight angular range of the outer peripheral surface of the support 4. However, the coil support 9.1 is configured to be rotationally symmetric and may extend over the entire outer peripheral surface of the support 4. Between the legs 14.1 and 14.2 of the coil support 9.1, the coil 10.1 and the bearing pole winding 11.1 are arranged side by side in the coil support 9.1. . The bearing pole windings 11 of the magnet bearing 6 are each composed of one pole element, and one or a plurality of field windings are held in the pole element. In the bearing pole winding 11, the extreme portion 12 projects in parallel to the legs 14.1 and 14.2 until just before the inside of the godet peripheral wall 1. A bearing gap 17 is formed between the inside of the godet peripheral wall 1 and the extreme portion 12. A metal thin plate 13 is embedded in the godet peripheral wall 1 in the region of the extreme part 12, and this metal thin plate 13 faces the extreme part 12 of the bearing pole winding 11.1.

  The magnet bearing 6.1 has a large number of bearing pole windings 11.1 to 11.4, which are arranged 90 ° apart from each other in the bearing plane and are respectively coiled. It is held in the support body 9.1. FIG. 1 shows bearing pole windings 11.1 and 11.3, which are facing each other in the support 4. FIG. 2 shows a total of four bearing pole windings 11.1 to 11.4 of the magnet bearing 6.1.

  The magnet bearing 6.2 arranged at the end fastened to the opposite side of the support 4 is configured in the same way as the magnet bearing 6.1. Therefore, the above description is referred to for the description of the magnet bearing 6.2. The bearing pole windings 11.1 to 11.4 of the magnet bearing 6.2 are arranged next to the coil 10.4. Two separate coil supports 9.2 and 9.3 are arranged on the outer periphery of the support 4 between the coil supports 9.1 and 9.4 at each end of the support 4. . Each coil support 9.2 and 9.3 is wound with one coil 10.2 and 10.3, respectively. The coil supports 9.1, 9.2, 9.3 and 9.4 are each formed from a number of individual segments, which are arranged on the support one after the other in the circumferential direction. . However, a configuration is also possible in which the coil supports 9.1, 9.2, 9.3 and 9.4 are each manufactured from one component and arranged on the support 4 as a ring.

  A large number of sensors 19.1 to 19.4 are assigned to each of the magnet bearings 6.1 and 6.2. Each sensor 19 is configured as a spacer sensor in order to detect the position of the godet peripheral wall 1. For this purpose, the free end of the sensor 19 is arranged at a short distance from the inside of the godet peripheral wall. The sensors 19.1 to 19.4 of the magnet bearings 6.1 and 6.2 are connected to the control device 18 by signal lines. The control unit 18 is connected to the bearing pole windings 11.1 to 11.4 of the magnet bearings 6.1 and 6.2 via the energy supply unit 26.

  As shown in FIG. 1, the diameter of the collar 5 of the support 4 is larger than the diameter of the godet peripheral wall 1. The collar 5 of the support body 4 has an annular groove 21 facing the godet peripheral wall 1, and the groove 21 receives the axial bearing 23. The axial bearing 23 is configured as a magnet bearing acting in the axial direction, and this magnet bearing forms an axial bearing gap 25 together with the end face side 22 of the godet 1.

  Two emergency running bearings 24.1 and 24.2 are formed between the drive shaft 3 and the support 4 inside the support 4 and spaced from each other. Thereby, reliable start-up or emergency running of the godet peripheral wall 1 independent of the magnet bearing is ensured. For example, a godet bearing or a rolling bearing is used as the emergency bearing.

  The embodiment of the godet according to the invention shown in FIGS. 1 and 2 is used for feeding, heat treating and drawing yarns. In this case, the coil 10 of the heating device 8 is supplied with power via the energy supply unit 26, so that a closed magnetic flux, referred to as thermal magnetic flux, is passed through the coil supports 9.1 to 9.4 into the legs 14. Between the coil support 9 and the godet peripheral wall 1. This magnetic flux induces an eddy current in the rotating godet peripheral wall, and this eddy current heats the godet peripheral wall. A large number of heating zones are formed by using a large number of coils arranged one after the other in the axial direction, and one temperature sensor (not shown) is assigned to each of these heating zones for temperature control. Has been. Thereby, the surface of the godet peripheral wall 1 is uniformly heated over the entire coating surface.

  In the coil supports 9.1 and 9.4, another magnetic flux for generating magnetic bearing force is provided by the magnet pole windings 11.1 to 11.4 of the magnet bearings 6.1 and 6.2, respectively. Is formed. For this purpose, power is supplied to the excitation windings of the bearing pole windings 11.1 to 11.4 via the energy supply unit 26. In this way, another magnetic flux called a bearing magnetic flux is supplied through the extreme portion 12 and the metal thin plates 13.1 and 13.2 to which the godet peripheral wall 1 belongs. In this case, a bearing magnetic flux is generated for generating a magnetic bearing force in the thermal magnetic flux.

  During operation, the actual position of the godet 1 is measured by the sensor 19 in the region of the bearing plane of the magnet bearings 6.1 and 6.2 and the measured value is supplied to the control unit 18. From this measured value, the position of the godet peripheral wall in the respective bearing plane is detected by the control unit, and depending on the desired correction of this position, the bearing pole windings 11.1 of the magnet bearings 6.1 and 6.2. Each excitation winding of ~ 11.4 is controlled. Thereby, substantially the same bearing gap 17 is formed between the pole 12 of the bearing pole winding 11 and the metal thin plate 13.

  In order to avoid undesirably heating the thin metal plate 13 in the godet peripheral wall 1, an insulator can be provided between the thin metal plate and the godet peripheral wall. In this case, the insulator can be made of non-metal or plastic, for example.

  Similarly, an insulating layer may be provided between the bearing electrode windings 11.1 to 11.4, the coil 10.1 or 10.4, and the coil supports 9.1 and 9.4. Thereby, a magnetic or electrical separation is obtained between the winding of the heating device and the winding of the magnet bearing.

  Another embodiment of a godet according to the present invention is shown in partial cross-section in FIG. The embodiment shown in FIG. 3 is almost the same as the embodiment shown in FIGS. Therefore, only the main differences between these embodiments will be described below.

  The godet peripheral wall 1 is rotatably supported on the support body 4 by magnet bearings 6.1 and 6.2. The magnet bearing 6.2 at the tightened end of the support 4 is configured in the same way as in the previous embodiment. In this case, the bearing pole windings 11.1 to 11.4 are received in a coil support 9.4 configured in a U-shape.

  The magnet bearing 6.1 at the free end of the support 4 is configured with a bearing pole winding 11, and the extreme part 12 of this bearing pole winding 11 protrudes inward in the radial direction. In this case, a bearing gap 28 is formed between the extreme portion 12 and the boss 27. The boss 27 is firmly coupled to the end wall 2 of the godet peripheral wall 1 and enters the inside of the godet peripheral wall 1. The boss 27 is penetrated by the drive shaft 3 and is firmly connected to the drive shaft 3 via the tightening element 7.

  Bearing pole windings 11.1 and 11.1-11.4 (not shown) are fixed in the receiving part 16 of the coil support 9.1. The coil support 9.1 has one side forming an outwardly open U-shaped receiving part for the coil 10.1, and the other side forming an annular receiving part inside the coil support 9.1. So that it is molded. The coil support 9.1 thereby has a long leg 14.1 which defines the coil receiving part and a short leg 14.2 which defines the receiving part 16 of the bearing pole winding 11.1. . As a result, the bottom of the groove of the coil support 9.1 has a stepped protrusion, so that the coil 10.1 is adjacent to the bearing pole winding 11.1 arranged inside the coil support 9.1. In contact with the outside of the coil support 9.1.

  During operation, a thermal magnetic flux is generated by the coil 10.1 and the coil support 9.1, which is guided by the godet peripheral wall 1 via the legs 14.1 and 14.2. In this case, the godet peripheral wall 1 is heated by the induced current until just before the end wall 2.

  For the bearing, the bearing pole windings 11.1 and the remaining bearing pole windings of the magnet bearing 6.1, which are evenly distributed over the outer circumference of the coil support, are respectively connected to the extremes 12 and the bosses 27. Bearing magnetic flux is generated between them. Accordingly, the thermal magnetic flux acts on the godet peripheral wall 1 outward, and the bearing magnetic flux for supporting the godet peripheral wall 1 acts on the boss 27 inward. Thereby, the possibility to avoid the magnetic fields affecting each other is provided.

  Another embodiment incorporating a bearing pole winding 11 of a magnet bearing with a coil support 9 of the heating device 8 is shown in FIG. In this case, the molded coil support 9.1 is fixed to the peripheral surface of the support 4 at the free end of the support 4. The coil support 9.1 has a long leg 14.1 at the free end facing the end wall 2 and a second short leg 14.2 spaced axially. The groove bottom of the coil support 9.1 is provided with a diameter step between the legs 14.1 and 14.2, so that on the one hand a receiving part for the coil 10 is formed and on the other hand a magnet. A receiving part for the bearing pole winding 11 of the bearing 6 is formed. A free leg of the support 4 is arranged between the receiving part 16 of the coil support 9 and the bearing pole winding 11. This provides further isolation and insulation between the heating device windings and the magnet bearing windings. The bearing pole winding 11 forms one bearing gap 28 together with the boss 27 as described in the embodiment shown in FIG.

  The magnet bearing 6.2 at the tightened end of the support 4 is configured in the same way as in the previous embodiment. In the region between the coil supports 9.1 and 9.4, another coil support segment, not shown here, is provided, these coil support segments being wound in the axial direction It has many coils. Since these coils are distributed non-uniformly or evenly on the peripheral surface of the support, induction heating of the godet peripheral wall 1 is possible.

  The particular embodiment of the magnet bearings 6.1 and 6.2 shown in the embodiment of FIGS. 3 and 4 makes it possible to support the godet peripheral wall particularly firmly. The position of the godet peripheral wall in the region that is not directly heated is detected by the bearing gap located inside the bearing pole winding and the boss 27. Thereby, it is possible to use a particularly simple spacer sensor with low durability against temperature.

  However, this configuration is also suitable for directly supporting the drive shaft 3 with a magnet bearing. In this case, a bearing gap is formed between the extreme portion of the bearing pole winding 11 and the drive shaft 3.

  Another embodiment incorporating a magnet pole winding 11 of a magnet bearing with a coil support 9 of the heating device 8 is shown in FIGS. FIG. 5 shows a part of the longitudinal sectional view of the godet, and FIG. 6 shows a part of the transverse sectional view of the godet. In this case, the molded coil support 9 at the free end of the support 4 is fixed to the peripheral surface of the support 4. The coil support 9 has the end of the leg 14.1 at the free end facing the end wall 2, and has the second leg 14.2 with an axial spacing therebetween. The groove bottom of the coil support 9 has a diameter step between the end of the leg 14.1 and the second leg 14.2, so that on the one hand a receiving part for the coil 10 is formed. On the other hand, a receiving part for the bearing pole winding 11 of the magnet bearing 6 is formed. The bearing pole winding 11 has two extreme parts 12, which are opposed in the radial direction. Thereby, a bearing magnetic flux having a circumferential magnetic flux flow is generated, whereby this bearing magnetic flux extends perpendicular to the thermal magnetic flux. The extreme portion 12 of the bearing pole winding 11 forms a bearing gap 28 together with the boss 27 as described in the embodiment shown in FIG. With the configuration of the coil support 9 as shown in FIG. 5, the thermal flux is guided in the axial direction between the legs 14.1 and 14.2. In this case, since the edge region of the end wall 2 is directly transferred to the godet peripheral wall 1, the edge region of the end wall 2 is heated. Since the godet peripheral wall 1 is uniformly heated to the end, the entire length of the godet peripheral wall 1 is provided for winding the yarn.

  The invention is not limited to the embodiment of the godet according to the invention shown in FIGS. Basically, the support 4 may be configured as a shaft provided with a notch for receiving a bearing pole element or a coil support on the outer peripheral surface. A rotatable godet peripheral wall is guided by the outer peripheral surface of the shaft. The configuration of the magnet bearing 6 need not be changed. What is important in this case is that the incorporation and superposition of the bearing pole winding with the heating device winding is such that the heating device coil support receives the bearing pole winding next to the heating coil. .

  In this case, only individual bearing pole windings may be incorporated into the coil support. When using a magnet bearing in which the bearing pole winding is divided into a number of bearing windings, it is not necessary to place each bearing pole winding on one coil support. This is particularly the case when the coil support is not configured rotationally symmetrical and is therefore attached to the support in a segmented manner with a spacing in the circumferential direction.

  Similarly, a shaft coupled to the godet can be supported magnetically. In this case, the bearing pole winding is arranged on the lower side in the radial direction of the heating coil in order to reliably heat the godet peripheral wall in the bearing plane.

1 is a schematic longitudinal sectional view of a first embodiment of a godet according to the present invention. It is a cross-sectional view along the AA line of the godet shown in FIG. It is a schematic sectional drawing of the front-end part of the godet of this invention by another Example. It is a schematic sectional drawing of the front-end part of the godet of this invention by another Example. FIG. 4 is a schematic cross-sectional view of a godet according to another embodiment of the present invention. It is a cross-sectional view along the AA line of the embodiment shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Godet peripheral wall 2 End wall 3 Drive shaft 4 Support body 5 Collar 6 Magnet bearing 7 Tightening element 8 Heating device 9 Coil support body 10 Coil 11 Bearing pole winding 12 Extreme part 13 Metal thin plate 14 Leg 15 Insulating layer 16 Receiving part 17 Bearing Gap 18 Control device 19 Sensor 20 Thread 21 Groove 22 End wall 23 Axial bearing 24 Emergency running bearing 25 Bearing gap 26 Energy supply unit 27 Boss 28 Bearing gap

Claims (17)

A godet for guiding, heating and supplying a yarn, which has a drivable hollow cylindrical godet peripheral wall (1), and can guide the yarn on the outer peripheral surface of the godet, A cantilevered support (4) is provided, in which the godet peripheral wall (1) acts in the radial direction with a number of bearing pole windings (11). At least one coil which is rotatably supported by two magnet bearings (6) and is provided with a heating device (8), the heating device (8) comprising a coil (10) in a support (4) A closed magnetic flux having a support (9) for inductively heating the godet peripheral wall (1) between the godet peripheral wall (1) and a coil support (9) comprising a coil (10) (Thermal flux) can be generated In and of the format are those,
At least one bearing pole windings of the coil (10) and the magnet bearings (6) of the heating device (8) (11), the heat flux magnet pole winding the godet peripheral wall (1) in the region (11) at least in so that partially guide, characterized in that attached to the support (4), the godet.   The godet according to claim 1, wherein the coil (10) and the bearing pole winding (11) are arranged side by side in the axial direction on the support (4) or above and below each other.   The coil support (9) forms a receptacle for at least one bearing pole winding (11) so that a bearing flux is generated by the bearing pole winding (11) in the thermal flux. The godet according to claim 1 or 2, wherein   The coil support (9) is formed in a cross-sectional shape with two legs (14.1, 14.2) protruding radially until just before the inside of the godet peripheral wall (1) for guiding the thermal flux. 4. A godet according to claim 3, wherein the coil (10) and the bearing pole winding (11) are arranged side by side between the legs (14.1, 14.2).   The legs (14, 1.14.2) of the coil support (9) configured in a U-shape are configured with the same length, and the coil (10) and the bearing pole winding (11) are the coil support. The bearing pole winding (11) and the godet peripheral wall (1) are arranged side by side in (9) and cooperate to guide the bearing magnetic flux. Godet.   A metal thin plate (13) is assigned to the bearing pole winding (11), the metal thin plate (13) is fixed inside the godet peripheral wall (1), and the bearing pole winding is used to guide the bearing magnetic flux. A godet according to claim 5, wherein the godet is adapted to cooperate with the   The legs (14.1, 14.2) of the coil support (9) are configured with different lengths, and the coil (10) is inside the coil support (9) and the bearing pole winding (11). Are arranged side by side on the outside of the coil support (9), and the bearing pole winding (11) and the boss (27) connected to the godet peripheral wall (1) cooperate to guide the bearing magnetic flux. The godet of claim 4, which works.   The coil support (9) is a free end of the support (4), a leg (14.2) projecting radially until just before the inside of the godet peripheral wall (1), and just before the inside of the end wall (2) A godet according to any one of claims 4 to 7, comprising a leg (14.1) for guiding the thermal magnetic flux protruding in the axial direction.   The godet according to any one of claims 4 to 8, wherein the bearing pole winding (11) has a coil support (9) and / or an insulating layer (15) for the coil.   The bearing pole winding (11) has two extremes (12) that are spaced apart from each other, these extremes (12) facing each other axially or radially, The godet according to any one of claims 1 to 9.   A number of bearing pole windings (11.1 to 11.4) can be received by the coil support (9.1), and the bearing pole windings (11.1 to 11.4) The godet according to any one of claims 1 to 10, wherein the godets are arranged at an angle to each other.   The godet peripheral wall (1) is supported by two magnetic bearings (6.1, 6.2) acting in the radial direction, one of the magnet bearings (6.1) being the free end of the support (4) And the other magnet bearing (6.2) is arranged at the clamped end of the support (4), and each of the magnet bearings (6) has one or more bearing pole windings ( 12. Godet according to any one of the preceding claims, wherein 11) is received by a coil support (9) attached to the end of the support (4).   The bearing pole winding (11) of the magnet bearing (6.1) formed on the free end of the support (4) is connected to the extreme part (12) of the bearing pole winding (11) and the godet peripheral wall (1). 13. Godet according to claim 12, wherein the godet is arranged radially inward with the extremes (12) so that the connected bosses (27) form a bearing gap (28).   The bearing pole winding (11) of the magnet bearing (6.2) formed at the tightened end of the support (4) is a bearing between the bearing pole winding (11) and the godet peripheral wall (1). 14. A godet according to claim 12 or 13, which is arranged radially outward with the extremes (12) so that a gap (17) is formed.   15. A sensor (19) is assigned to each bearing pole winding (10), each bearing pole winding (10) being individually controllable by a control device (18). The godet according to any one of the above.   The godet peripheral wall (1) is supported by an additional axial bearing (23), the axial bearing (23) being formed by a magnetic bearing acting in the axial direction. The stated godet.   17. At least one gripping bearing is provided, the gripping bearing being configured as a contactless radial bearing (24) or as an elastically clamped radial bearing. The godet described in the paragraph.

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