• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a godet unit (1) with a cylindrical heatable godet casing (2) made of a ferromagnetic and electrically conductive material having a thickness (D) and an outer circumferential surface (21) for heating and guiding at least one thread (14) or band ( 15) and surrounds an interior (22) in which a rotatable drive shaft (5) is centrally arranged, on which the godet casing (2) is fastened with an outer end face (7), and with a fixed induction coil arrangement (3) between the Drive shaft (5) and the godet casing (2) on a bobbin (4), wherein the bobbin (4) consists of non-electrically conductive and non-ferromagnetic material, preferably glass, and concentric with the drive shaft (5) and the godet casing (2 ) and wherein substantially no ferromagnetic material is present in the interior space (22). The induction coil arrangement (3) is spaced from the godet casing (2) by an outer annular gap (R2) and has an inner annular gap (R1) from the drive shaft (5), the inner annular gap (R1) being larger than the outer (R2). , preferably more than twice as large, in particular more than five times as large. The drive shaft (5) has at least in the interior (22) of the godet casing (2) on a good electrical conductive coating (6), in particular in the form of an aluminum tube. The invention is suitable as a cost-effective and lightweight replacement for previously used inductive Galettenheizungen with magnetic field-conducting internals in the interior of the godet shell (2).
    公开号:CH710793A2
    申请号:CH00039/16
    申请日:2016-01-11
    公开日:2016-08-31
    发明作者:Baader Uwe
    申请人:Ritter Elektronik Gmbh；
    IPC主号:
    专利说明:

    The present invention relates to a godet unit with a cylindrical godet casing, which is heated by means of a fixed induction coil assembly. Heatable godets are used in the textile industry for heating and guiding at least one thread or ribbon. Typically, godet mats rotate at a peripheral speed of up to 8,000 meters per minute [m / min]. There are known in the art various systems for heating Galettenmänteln, on the one hand can be done from the outside heating, but on the other hand preferably takes place heating by means in the interior of the godet shell. DE 19 540 905 A1 describes such an arrangement in which a fixed induction coil in the interior of a godet casing can induce electrical currents in the godet casing, which heat up the godet casing. The arrangement from which the present invention is based also describes how temperature readings from the rotating godet casing can be transmitted outwardly to a fixed configuration.
    There are numerous other embodiments for the inductive heating of a godet casing by arranged in the interior of the godet casing induction coils. All have in common that previously ferromagnetic materials, preferably in the form of laminated sheets or ferrites, are used to direct the magnetic flux of the induction coil as completely as possible in the godet shell. This requires a considerable amount of material and makes the inductive heating arrangement relatively difficult and expensive. However, this has been considered necessary to avoid heating of the drive shaft and other components of the godet assembly and to make the heating of the godet shell as effective as possible.
    The object of the present invention is to make an inductive heating arrangement inside a godet shell easier and cheaper, without significantly increasing the losses.
    To solve this problem, a godet unit according to the independent claim 1. Advantageous embodiments, which can be used individually or in a technically meaningful way, are described in the dependent claims.
    A galette unit according to the invention has a cylindrical heatable godet casing made of a ferromagnetic and electrically conductive material, which has a thickness and an outer peripheral surface for heating and guiding at least one thread or belt and surrounds an inner space in which a rotatable drive shaft is centrally arranged, on the godet shell is fixed with an outer end face, and with a fixed induction coil assembly between the drive shaft and the godet shell on a bobbin, wherein the bobbin of non-electrically conductive and non-ferromagnetic material and is arranged concentrically to the drive shaft and the godet shell, and wherein essentially no ferromagnetic material is present in the interior, with the exception of the drive shaft, if this is ferromagnetic.
    The coil assembly according to the present invention is a so-called "coreless" or "ironless" arrangement, which means that there are no internals conducting the magnetic fields inside the godet casing. Surprisingly, it has been shown that the omission of the magnetic field-conducting internals does not lead to a serious increase in the losses and also not to a massive heating of other structural parts than the godet shell. In fact, according to the invention, a bobbin for example made of plastic can be used, whereby the entire induction coil assembly has significantly less weight than in the prior art. Surprisingly, however, glass has also proved to be a suitable material. Glass tubes can be produced cost-effectively and are much more temperature-resistant than most plastic parts, so that glass can be used even at very high temperatures inside the godet. Advantageously, glass types are used, especially for use at high temperatures of z. B. 100 to 200 or even 300 ° C were developed. Glass has not hitherto been considered as a material for components inside galettes because the person skilled in the art considered the different thermal expansion coefficients of metal and glass to be a hindrance. The coil support is actually fixed only on one side or can be elastically clamped so that it can stretch in the axial direction independently of the other components. The coil carrier also only needs to carry the coil, since this is well balanced, so that there are no additional loads for a glass tube even at high speeds. Moreover, the cost of a substantially cylindrical glass bobbin is significantly lower than the cost of materials and assembly when using laminated transformer sheets. It turns out that even a very uniform inductive heating of the godet casing can be achieved without the use of magnetic field conducting devices. According to the present invention, preference is given to using an induction coil arrangement which has at least one coil running concentrically around the drive shaft and which can be connected to an AC source of predeterminable frequency and / or current intensity.
    The basic arrangement of a solenoid and its supply from an AC power source are known in principle from the prior art. Although the omission of ferromagnetic cores leads to a slightly lower inductance, but this can be compensated by appropriate modification of the AC power source or by increasing the frequency. The present invention therefore requires only minor changes to known power and control devices.
    The losses can be kept particularly low when the induction coil assembly is spaced with an outer annular gap of the godet casing, which is significantly smaller than an inner annular gap with which the induction coil assembly is spaced from the drive shaft. The magnetic field density in the interior of the coil is thereby relatively low, while the outer magnetic field of the coil assembly concentrates in the godet casing. Preferably, the inner annular gap is at least twice as large, in particular more than five times as large as the outer annular gap.
    In a preferred embodiment of the invention, the drive shaft, at least in the interior of the godet casing on a good electrical conductive coating, in particular aluminum.
    This can be done for example by attaching an aluminum tube with a thickness of 0.1-3 mm, which is pushed over the drive shaft. Since the drive shaft generally consists of electrically conductive material, in particular even of ferromagnetic material, the magnetic field inside the coil arrangement would also generate currents in the drive shaft and heat them up. Although this would only be the case to a lesser extent because of the size of the inner annular gap, it is nevertheless undesirable. An electrically good conductive coating, as it can be achieved for example by an aluminum tube or a copper tube forms superficial eddy currents due to the low electrical resistance, which counteract the magnetic field generating them and thus almost displace it from the range of the drive shaft. Although the surface warms up, but to a much lesser extent than would otherwise heat up the entire drive shaft.
    According to the invention, the coil assembly in order to fulfill its task, designed so that in the one or more coil (s) flowing alternating current generates a magnetic alternating field which penetrates into the godet and there induces electrical currents that heat the godet shell ,
    In principle, all known for this purpose coil arrangements according to the invention can be used without ferromagnetic material in the interior of the godet shell, but are particularly suitable for a cylinder or more successively arranged cylindrical coils for this purpose.
    Due to the lighter design of the bobbin, the present invention is also suitable for very long godets, with an axial length of up to 1,500 mm or even higher. Also with respect to the outside diameter, the coil arrangement sets no limits, so that outside diameter of up to 500 mm and above can be achieved.
    As known in principle from the prior art, also in the present invention, a temperature control can be carried out by measuring the temperature in the godet casing by means of at least one temperature sensor, which is connected to a control device for controlling the AC power source of the induction coil assembly.
    It should be noted that in a preferred embodiment of the invention, the outer end face of the godet, which connects the godet casing with the drive shaft, consists of ferromagnetic material. As a result, the hub is advantageously heated. At the same time, this prevents stray magnetic fields from occurring outside the godet arrangement.
    An embodiment of the invention, to which the invention is not limited, is explained schematically below with reference to the drawing. Show it:<Tb> FIG. 1 <SEP> a schematic longitudinal section through a galette unit according to the invention,<Tb> FIG. 2: <SEP> a cross section along the line II-II through Fig. 1,<Tb> FIG. 3: <SEP> a typical magnetic field profile in a godet arrangement according to FIG. 1,<Tb> FIG. 4: <SEP> the typical eddy currents in a godet arrangement according to the invention according to FIG. 2, and FIG<Tb> FIG. 5: <SEP> An attachment of a glass tube as a coil carrier.
    1 and 2 show in longitudinal section and in cross section in a partially schematic arrangement of an inventive godet assembly 1 with a godet 2 with a thickness D. The godet 2 is connected to an outer end face 7 with a drive shaft 5, the concentrically in the interior 22 of the godet shell 2 extends. The drive shaft 5 is surrounded by an aluminum tube 6 at least within the inner space 22, wherein the aluminum tube 6 has a layer thickness d of 0.1-3 mm. Also concentric with the jacket 2, a coil carrier 4, preferably a glass tube, is arranged in the interior 22, which carries a cylindrical induction coil arrangement 3, in particular in the form of a continuous cylindrical coil. The induction coil assembly 3 is spaced from the godet casing 2 by an outer annular gap R2 and by an inner annular gap R1 of the drive shaft 5. The expansion of the coil support 4 and the thickness of the aluminum tube 6 are included in the size of the inner annular gap R1. It is important that the bobbin 4 is not made of ferromagnetic material and is not electrically conductive and the interior 22 otherwise contains no ferromagnetic materials, except possibly the drive shaft 5. It is therefore practically a coreless or ironless coil arrangement. The power supply of the induction coil 3 via a power supply 8, which is powered by an AC power source 9. If regulation of the temperature of the godet casing 2 is desired, which is usually the case, arrangements known from the prior art can be used. For this purpose, for example, at least one temperature sensor 10 may be arranged in the godet casing 2, which is connected via a non-contact signal transmission 11 to a control device 12 which regulates the alternating current source 9. The signal line 11, since it has to transmit measured values from a rotating device, can either pass through the drive axis and be guided to sliding contacts or a wireless connection can be used. The entire godet unit 1 is typically attached to a support structure 13. In this case, the drive shaft 5 can be rotatably mounted in a suitable bearing 14, while the bobbin 4 is mounted on one side stationary on the support structure 13. Due to the reduced weight and the simpler structure of the bobbin 4 and the induction coil assembly 3, the present invention is also suitable for godet units 1 with a large axial length L, for example, 1500 mm or more and for small or large outer diameter A, up to a magnitude of 500 mm and above. The godet casing 2 has an outer peripheral surface 21, which is suitable for heating and guiding at least one thread 15 or band 16. Very often, a plurality of threads and / or a thread are guided in multiple wrapping on a godet 2.
    3 and 4 illustrate the magnetic and electrical properties of the godet unit 1 according to the invention. In principle, a typical inner and outer magnetic field is formed around a cylindrical induction coil arrangement 3, but this magnetic field is concentrated outside in the godet casing 2, while it is largely displaced by the action of the aluminum tube 6 from the drive shaft 5 inside. This leads to the indicated in Fig. 4 by rings and arrows current flows II in the aluminum tube 6,12 in the godet 2, 13 in the induction coil assembly 3, which of course also change their direction with alternating magnetic field. A flowing in the induction coil 3 current 13 generates a flowing in the opposite direction ring current 12 in godet casing 2 and a small also flowing in the opposite direction of current II in the aluminum tube 4. To a very large extent, the energy of the magnetic field can therefore be used to heat the godet 2 ,
    A preferred way of attaching a glass tube as a coil support 4 is shown in Fig. 5 and is to attach the glass tube 4 with tie rods 17 between the support structure 13 and one of the support structure 13 axially opposite flange plate 18. The elongation of the glass tube can be compensated for by the elongation of the tie rods 17 and by embedding one end of the glass tube 4 in a heat-resistant silicone-lined groove 19 or a centric seat on the flange side. This type of holder also ensures the centering at the same time, the silicone can compensate for differences in diameter during thermal expansion. Advantageously, the tie rods 17, held and tightened by nuts 20, are also made of electrically and magnetically nonconductive material.
    The present invention is therefore suitable as a replacement for previously used inductive Galettenheizungen with magnetic field-conducting internals in the interior of the godet shell. Coil carriers made of plastic are cheaper and easier than previously known arrangements with laminated ferromagnetic sheets, so that even galette units with a large axial length or large diameter can be equipped particularly well with novel heating devices.
    LIST OF REFERENCE NUMBERS
    [0021]<Tb> 1 <September> galette<Tb> 2 <September> godet<Tb> 3 <September> inductor<tb> 4 <SEP> Coil carrier, glass tube<Tb> 5 <September> Drive Shaft<Tb> 6 <September> coating / aluminum tube<tb> 7 <SEP> outer face<Tb> 8 <September> power supply<Tb> 9 <September> AC power source<Tb> 10 <September> Temperature Sensor<Tb> 11 <September> Signal Transmission<Tb> 12 <September> regulator<Tb> 13 <September> support structure<Tb> 14 <September> Storage<Tb> 15 <September> thread<Tb> 16 <September> Band<Tb> 17 <September> tie rod<Tb> 18 <September> flange<tb> 19 <SEP> Silicone-lined groove<Tb> 20 <September> retaining nut<tb> 21 <SEP> Outer peripheral surface of the godet mantle<tb> 22 <SEP> Interior of the godet mantle<Tb> <September><tb> D <SEP> Thickness of godet mantle<tb> d <SEP> thickness of the coating / aluminum tube<tb> R1 <SEP> inner annular gap<tb> R2 <SEP> outer annular gap<tb> L <SEP> axial length of the godet mantle<tb> A <SEP> Outer diameter of godet mantle<tb> I1 <SEP> induced current in the aluminum tube<tb> I2 <SEP> induced current in the godet shell<tb> I3 <SEP> Current in the induction coil assembly<Tb> M <September> magnetic field
    权利要求:
    Claims (10)
    [1]
    1. godet unit (1) with a cylindrical heatable godet casing (2) made of a ferromagnetic and electrically conductive material having a thickness (D) and an outer peripheral surface (21) for heating and guiding at least one thread (14) or band (15) and an interior (22) surrounds, in which a rotatable drive shaft (5) is centrally arranged, on which the godet casing (2) with an outer end face (7) is fixed, and with a fixed induction coil assembly (3) between the drive shaft (5 ) and the godet casing (2) on a bobbin (4), wherein the bobbin (4) consists of non-electrically conductive and non-ferromagnetic material and concentric with the drive shaft (5) and the godet casing (2) is arranged and wherein substantially no ferromagnetic material in the interior (22) is present.
    [2]
    2. godet unit (1) according to claim 1, wherein the induction coil assembly (3) has at least one concentrically about the drive shaft (5) extending coil (3) which is connectable to an AC power source (9) of predetermined frequency and wherein the coil carrier (4). preferably made of glass.
    [3]
    3. godet unit (1) according to claim 1 or 2, wherein the induction coil assembly (3) having an outer annular gap (R2) of the godet casing (2) is spaced and with an inner annular gap (R1) of the drive shaft (5) and wherein the inner annular gap (R1) is greater than the outer (R2), preferably more than twice as large, in particular more than five times as large.
    [4]
    4. godet unit (1) according to any one of the preceding claims, wherein the drive shaft (5) at least in the interior (22) of the godet shell (2) has a good electrical conductivity coating (6), in particular of aluminum or copper.
    [5]
    5. godet unit (1) according to claim 4, wherein the coating (6) is an aluminum tube having a thickness (d) of 0.1 to 3 mm.
    [6]
    6. godet unit (1) according to any one of the preceding claims, wherein the coil assembly (3) is designed so that in the one or more coil (s) flowing alternating current generates an alternating magnetic field which penetrates into the godet casing (2) and there electrical Induced eddy currents that heat the godet shell (2).
    [7]
    7. godet unit (1) according to any one of the preceding claims, wherein the godet casing (2) has an axial length (L) of 100 to 1500 mm.
    [8]
    8. godet unit (1) according to one of the preceding claims, wherein the godet casing (2) has an outer diameter (A) of 100 to 500 mm.
    [9]
    9. godet unit (1) according to any one of the preceding claims, wherein at least one temperature sensor (10) in or on the godet casing (2) is arranged, which is connected to a control device (12) for controlling the AC power source (9) of the induction coil assembly (3) ,
    [10]
    10. godet unit (1) according to any one of the preceding claims, wherein the outer end face 7 is made of ferromagnetic material and has a thickness similar to the thickness (D) of the godet casing (2).
    类似技术:
    公开号 | 公开日 | 专利标题
    CH710793A2|2016-08-31|Galette with an induction coil assembly for heating without magnetic flux conducting internals.
    DE3033482C2|1983-06-23|Electromagnetic heating roller
    DE19964550B4|2007-12-13|Method and device for clamping tools
    DE1660330A1|1970-03-19|Heating device
    DE102005061670B4|2008-08-07|Method for inductive heating of a workpiece
    DE2450647A1|1975-05-07|HEATABLE STRETCH ROLLER
    EP1805358B1|2011-03-23|Galette for guiding, heating and transporting a thread
    DE1248187B|1967-08-24|Heating device for heating a continuous yarn or thread in continuously operating textile machines
    DE19854034A1|2000-05-18|Induction heating for thermo rolls
    CH502445A|1971-01-31|Heated rotary yarn godet - with specially located temperature-sensing probe
    DE2234301A1|1973-02-01|HEATED ROLL
    DE1565149B2|1970-10-01|Electrically heated heating drum
    DE1948525C3|1975-09-25|Inductively heated godet for textile machines or the like
    DE1660235A1|1972-03-23|Induction heatable godet
    DE1235498B|1967-03-02|Method and device for twisting endless threads or bundles of threads
    EP0854216B1|2002-05-22|Roller for transporting, guiding and heating a travelling synthetic yarn
    DE19538261C2|1998-08-20|Induction heated godet
    EP1416772A1|2004-05-06|Inductively heated roller
    DE2248887A1|1973-04-12|STRETCH ROLL FOR DRAFT PULLEY, DRAFT WINDING AND SPINNING DRAFT WINDING MACHINES
    DE102017126837A1|2018-05-24|Electrically heated godet and method for electrically heating a godet
    DE1151724B|1963-07-18|Rotating drying cylinder with electric heating for paper webs or the like.
    DE3816618C2|1990-05-10|
    DE1038671B|1958-09-11|Adjustable device for heating rotating rollers made of ferromagnetic material
    DE1957110C3|1984-09-13|Stretching roller
    DE963174C|1957-05-02|Induction heating coil
    同族专利:
    公开号 | 公开日
    CH710793B1|2020-02-28|
    DE102015108635A1|2016-08-25|
    CN105908318A|2016-08-31|
    CN105908318B|2020-02-07|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CH690599A5|1994-11-10|2000-10-31|Barmag Barmer Maschf|Galette for heating and conveying threads.|
    DE19610763A1|1996-03-19|1997-09-25|Zinser Textilmaschinen Gmbh|Heated godet for heating synthetic threads|
    US6255633B1|1999-12-28|2001-07-03|Toshiba Tec Kabushiki Kaisha|Fixing device using induction heating|
    EP1416772A1|2002-11-04|2004-05-06|Schärer Schweiter Mettler AG|Inductively heated roller|
    DE102010046898A1|2010-09-29|2012-03-29|Oerlikon Textile Gmbh & Co. Kg|Galette|
    CN103313452B|2013-05-30|2015-11-18|上海杜纳斯机电设备有限公司|A kind of carbon nano-fiber electromagnetic induction heating roller arrangement|CN108076547B|2016-11-18|2021-08-20|佛山市顺德区美的电热电器制造有限公司|Electromagnetic heating system and zero-crossing detection device and method thereof|
    CN108076543B|2016-11-18|2021-08-20|佛山市顺德区美的电热电器制造有限公司|Electromagnetic heating system and zero-crossing detection device and method thereof|
    DE102017126837A1|2016-11-23|2018-05-24|Ritter Elektronik Gmbh|Electrically heated godet and method for electrically heating a godet|
    CN111194577B|2017-10-17|2022-02-22|日本Tmt机械株式会社|Induction heating roller and spinning stretching device|
    EP3758444A4|2018-02-23|2021-11-24|TMT Machinery, Inc.|Induction heating roller and spun yarn take-up machine|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102015102377|2015-02-19|
    DE102015108635.2A|DE102015108635A1|2015-02-19|2015-06-01|Galetteneinheit with an induction coil assembly for heating without magnetic flux conductive internals|
    [返回顶部]