GALETTE

Description

[0001] The present invention relates to a godet, which has a godet drive motor, a motor bearing, a rotatably mounted drive shaft, driven or drivable by the godet drive motor, arranged centrally on the godet and aligned in the axial direction of the godet, wherein a rotor of the godet drive motor is fastened to a circumferential region of the drive shaft, a godet casing connected to the drive shaft, a godet casing heating enclosed by the godet casing and at least one cooling means.

[0002] A godet of this type is a driven, rotating roller used in the textile industry, particularly in spinning mills, for filament production. At least one thread, at least one fiber, or at least one ribbon is guided along the heated outer surface of the godet. In practice, several godets arranged at different levels and offset from one another and operating at different speeds are usually combined to form a draw-roll unit. Godet shells typically rotate at a peripheral speed of up to 5,000 meters per minute.

[0003] Heating the godet is essential for filament production. The cylindrical godet shell is heated from the inside by the godet shell heater, usually designed as an induction heater, which allows moisture to be removed from the thread, fiber, or ribbon guided along the godet shell.

[0004] The temperature of the godet is typically measured by at least one thermal sensor and transmitted to a godet control system using a measured value transmitter.

[0005] The godet roll shell is rotated by means of the godet drive motor. For this purpose, it is common practice in the prior art, as described, for example, in document DE 10 2014 006 854 A1, to provide a hub at one end of the godet roll shell, which is firmly connected to a drive shaft end projecting from a bearing housing. The godet drive motor, designed as an electric motor and coupled to the drive shaft at its bearing end, is integrated into the bearing housing.

[0006] However, the high temperatures used in godet heating are a technical disadvantage for the godet drive motor, the godet bearing components and the measuring transmitter.

[0007] Due to the physical separation of the godet drive motor from the hot godet shell in the prior art, the godet drive motor, which runs warm even during operation, does not become even hotter and can be suitably cooled using a cooling device. The cooling devices for godet drive motors described in EP 0 424 867 A1 and EP 0 454 618 B1 use cooling air. Air cooling can be supported by an externally driven fan.

[0008] However, the use of cooling fluid for motor cooling is also particularly advantageous. It is known to house the godet drive motor and bearing components in a water-cooled housing located away from the godet heating system.

[0009] In the document EP 1 126 061 A2, in which the godet drive motor is also provided away from the godet heating system, the bearing components of the godet, by which the drive shaft of the godet is rotatably supported, are cooled by means of a combination of air and steam cooling.

[0010] In the conventional godets, the transmitter used is also located away from the godet heater. It is typically air-cooled.

[0011] However, these designs also result in disadvantages, such as a large overall length of the godet with a comparatively small effective range, which leads to considerable space requirements, especially in the case of set godets, as well as large mechanical loads and the associated premature wear of the bearing elements for the godet shell if the godet shell bearing is arranged away from the godet heating system.

[0012] Furthermore, if different tempering systems are used to cool the individual components of the godet, several energy sources are required, which in turn leads to increased space requirements and increased maintenance and service costs.

[0013] The document DE 199 02 315 A1 describes a godet unit with a stationary support. The support has an axle and a hollow cylindrical bearing end adjoining the axle. A stator runs around the axle. A rotor is provided around the stator and is attached to an open end of a pot-shaped godet shell enclosing the axle and the bearing end. The godet shell is attached by its end wall to a shaft, which is rotatably mounted inside the bearing end by means of bearings. A heating device for heating the godet shell is arranged around the bearing end. The heating device is provided at an axial distance from the stator and the rotor. The godet unit has no cooling system.

[0014] The document DE 198 43 990 C1 discloses a godet unit with a shaft, around whose first end a rotor is provided, around which a stator is provided, and at whose second end a hub is attached, which connects a godet shell of the godet unit to the shaft. An induction heater for heating the godet shell is provided near the godet shell. The induction heater is positioned at a distance from the rotor and the stator. The motor and the induction heater are separated from each other by a supporting flange. A cooling block is attached to a motor housing enclosing the motor, from which cooling channels extend toward the motor and the induction heater.

[0015] It is therefore the object of the present invention to propose a godet that requires less space and is less prone to wear than the solutions known in the prior art.

[0016] This object is achieved by a godet which has a godet drive motor, a motor bearing, a rotatably mounted drive shaft, which is driven or drivable by the godet drive motor, is arranged centrally on the godet and is aligned in the axial direction of the godet, wherein a rotor of the godet drive motor is fastened to a circumferential region of the drive shaft, a godet shell connected to the drive shaft, a godet shell heater enclosed by the godet shell and at least one cooling means, wherein at least a part of the godet drive motor, the motor bearing and at least one fluid channel of the cooling means are arranged in a section of a region of the godet enclosed by the godet shell, in which the godet shell heater is also arranged, wherein the godet drive motor is arranged in the same axial region of the godet as the godet shell heater.

[0017] Preferably, the entire godet drive motor is arranged in the area of ​​the godet which is cooled by the at least one cooling fluid channel and enclosed by the godet shell, in which the godet shell heating is also arranged.

[0018] The present invention thus departs from the prior art, which always attempted to position the godet drive motor as far away as possible from the godet jacket heater to prevent additional heating of the godet drive motor, which already heats up considerably during operation, by the godet jacket heater. In complete contrast to the prior art, in the godet according to the invention, at least part of the godet drive motor, preferably the entire godet drive motor, is even arranged in a region of the godet heated by the godet jacket heater.

[0019] Thus, the godet drive motor is no longer located at one end of the godet shell surrounding the godet shell heater, as in the prior art. Instead, the inventive arrangement of the godet drive motor within the godet shell and the godet shell heater saves space. This saved space can be used, for example, to shorten the overall length of the godet when space is limited, but also to increase the effective area of ​​the godet when space remains the same.

[0020] In the godet according to the invention, motor cooling is achieved by a fluid cooling system with at least one fluid channel, which runs between the godet drive motor and the godet jacket heater. The fluid cooling primarily dissipates the waste heat from the godet drive motor, as it is located in close proximity to the motor. One or more fluid channels can be formed in the material of the support.

[0021] The fluid cooling system also dissipates heat from the motor bearing and preferably from a godet's transducer. In the present invention, it is a unified temperature control system that extends over the godet drive motor, the motor bearing, and preferably the godet's transducer, and is located in a region within the godet shell and the godet shell heater.

[0022] The godet according to the invention is designed such that the bearing for the godet drive motor is also located in the area of ​​the godet enclosed by the godet shell, i.e., in an area where the load on the godet occurs. Thus, there is no lever arm that increases the resulting force on this bearing. In the present invention, the motor bearing also serves as the godet shell bearing.

[0023] In a preferred embodiment of the godet according to the invention, the at least one part of the godet drive motor and the at least one part of the motor bearing are arranged in an interior space of a carrier, wherein the at least one fluid channel between the godet drive motor and the godet jacket heater runs through the material of the carrier.

[0024] Since, according to the invention, the godet drive motor is located in a region of the godet where the godet jacket heater is also located, in this embodiment of the invention, in which the godet drive motor is located in an interior space of the support, the godet jacket heater is arranged around at least a portion of the support. This portion of the support at least partially shields the godet drive motor from the heat radiation of the godet jacket heater.

[0025] The carrier forms a stable support for the fluid cooling and thus physically and thermally separates the godet drive motor from the godet jacket heating.

[0026] The at least one fluid channel can be integrated into the carrier in such a way that the fluid cooling extends at least over a length of the carrier so that the godet drive motor, the motor and godet shell bearings, corresponding sealing components and a measured value transmitter of the godet are cooled by the same fluid cooling.

[0027] The carrier does not rotate. Electrical connecting cables to the godet drive motor can be conveniently routed into the interior of the carrier. The stator of the godet drive motor can be securely mounted inside the carrier. This means the position of the godet drive motor can be securely fixed. Furthermore, the carrier provides additional stabilization of the godet and protects the godet drive motor and the motor bearings. This arrangement also saves space.

[0028] Preferably, the support is rotationally symmetrical. The cylindrical interior of the support then easily accommodates the godet drive motor and the motor mount. The rotationally symmetrical shape of the support is adapted to the shape of the godet. However, in other embodiments of the present invention, the support can be plate-shaped or curved, for example.

[0029] The carrier can be formed in one piece or from several layers and / or components.

[0030] In an advantageous embodiment of the present invention, the cooling system comprises a coiled tube with adjacently arranged flow and return lines for a cooling fluid. Due to the coiled design of the tube forming the at least one fluid channel, the cooling fluid can be guided around the entire circumference of the godet drive motor. The coiled tube forms a closed cooling circuit with flow and return connections at one beginning and a deflection at one end of the coil. Along the coiled tube's course, the flow is located next to the return, ensuring uniform cooling.

[0031] It is also advantageous if the flow and return of the coiled pipe are at the same distance from each other.

[0032] It has proven particularly advantageous if the supply and return lines of the cooling system are located next to one another in the same cylindrical plane of the support and / or if the supply and return lines of the cooling system are located next to one another in relatively stepped planes of the support and / or if the supply and return lines of the cooling system are located on a conical surface plane of the support. This means that the supply line is directly next to the return line on the same diameter and / or the supply and return lines are located on offset diameter steps and / or the supply and return lines converge or diverge conically. This results in a particularly slim cooling system that is adapted to the other dimensions of the godet, allowing the godet to be designed compactly overall.

[0033] Preferably, the coiled tube is a steel tube cast into the material of the support. The steel tube has a long service life and good thermal conductivity, thus providing advantageous cooling permanently and with virtually no maintenance.

[0034] In further developments of the godet according to the invention, at least one additional coil, in which a medium other than the cooling fluid is conveyed, runs parallel to the coiled cooling tube in the material and / or on an inner wall of the support. With the help of the additional coil, lubricant, for example, can be conveyed to individual components of the godet, such as the bearings.

[0035] Preferably, the support is made of metallic and / or mineral material. A support made of metal, such as aluminum or cast iron, exhibits particularly good thermal conductivity, allowing the temperature of the heated godet drive motor to be dissipated particularly effectively. Alternatively, the support can be made of a plastic with good thermal conductivity.

[0036] A mineral carrier material, on the other hand, can be used to at least partially thermally decouple the godet drive motor from the godet jacket heater by means of the carrier. To ensure effective heat dissipation of the waste heat from the godet drive motor through the fluid cooling integrated into the carrier, it is advantageous in this embodiment if the fluid cooling is provided closer to the godet drive motor than to the godet jacket heater and / or if a good heat exchanger, such as a metal sleeve or metal coating, is provided at least on the side of the carrier facing the godet drive motor.

[0037] The support is preferably designed to have a support insert that is recessed into the area of ​​the godet enclosed by the godet shell, and a support attachment on which the godet shell rests. This allows the godet shell, with the godet shell heater provided therein, to be advantageously slipped over the support insert, and this structure to be placed onto the support attachment.

[0038] Thus, the godet shell heater can be placed on the support, with the material of the support providing thermal decoupling, so that the cooling system integrated into the support only slightly cools the godet shell heater. Furthermore, with this design, the godet shell heater can be formed separately and electrically contacted, and subsequently integrated into the godet, particularly in the space between the godet shell and the support.

[0039] In addition or alternatively to fluid cooling, air cooling can also be provided by at least one air channel formed in the material of the carrier and / or on an inner wall of the carrier.

[0040] In an advantageous embodiment of the invention, a gap is established between the godet shell heater and the support by at least one spacer, which contains air. The spacer(s) preferably consists of at least one material with poor thermal conductivity. For example, two Teflon rings, spaced apart from one another, can serve as spacers, such as a slip-on, on the support, on which the godet shell heater rests.

[0041] The air between the godet shell heater and the support is a poor heat conductor. This means that the support absorbs less heat from the godet shell heater and can thus better dissipate heat from the godet drive motor. Furthermore, more of the heat generated by the godet shell heater can be transferred to the godet shell.

[0042] In a further embodiment of the invention, additional cooling is achieved by mounting a fan impeller on the drive shaft within the support, which rotates with the drive shaft. The fan impeller protects the godet drive motor and bearing components of the godet from heat generated by heat conduction from the godet casing via the drive shaft. The fan impeller is located below the support, in which the fluid cooling system is integrated. The rotation of the fan impeller creates air turbulence between the fluid cooling system and the drive shaft, thus reducing heat conduction via the drive shaft. The fan impeller can also be located below the fluid cooling system.

[0043] One or more temperature sensors are preferably arranged inside the godet, for example, in the godet casing. The connecting cables of the temperature sensors run at one end of the drive shaft in a measurement transmitter designed as a rotary transformer, via which the measured temperature signals can be transmitted, for example, to an external control and / or evaluation unit of the godet.

[0044] In an expedient embodiment of the present invention, the measured value transmitter has a rotatable part which is fastened to the drive shaft and a fixed part which is fastened in the carrier, wherein between the rotatable part and the fixed part of the measured value transmitter there is an air gap via which a signal is transmitted.

[0045] The invention is described in more detail below with reference to exemplary embodiments and associated figures, without being limited to these.

[0046] Showing: Figure 1 schematically shows a longitudinal section through an embodiment of a godet according to the invention; Figure 2 schematically shows a perspective top view of a support of an embodiment of the godet according to the invention; and Figure 3 schematically shows a perspective view of a cooling coil of an embodiment of the godet according to the invention.

[0047] Figure 1 is a sectional side view of an embodiment of a godet 1 according to the invention.

[0048] The godet 1 has a drive shaft 5 in the center, aligned in the axial direction R of the godet 1. The drive shaft 5 is rotatably mounted.

[0049] The drive shaft 5 is driven by, or can be driven by, a godet drive motor 2 of the godet 1. For this purpose, a rotor 21 of the godet drive motor 2 is attached to a circumferential area of ​​the drive shaft 5, in a region of the drive shaft 5, i.e., not at its end. Accordingly, the drive shaft 5 can rotate with the rotor 21 and is securely held in position.

[0050] The godet drive motor 2 is mounted by means of a motor bearing 4 sitting on the drive shaft 5.

[0051] In the embodiment shown, the motor bearing 4 has a first bearing 41 in front of the rotor 21 of the godet drive motor 2 and a second bearing 42 behind it in the longitudinal direction of the godet 1. The first bearing 41 and the second bearing 42 are each ball bearings in the embodiment shown. The bearings 41, 42 support both the rotor 21 of the godet drive motor 2 and the godet casing 7 with the drive shaft 5.

[0052] A godet casing 7 of the godet 1 is connected to the drive shaft 5. During operation of the godet 1, at least one thread, at least one fiber, and / or at least one ribbon is guided along the outer circumference of the godet casing 7. The at least one thread, the at least one fiber, and / or the at least one ribbon wraps around the godet casing 7.

[0053] The godet shell 7 is cylindrical. A godet shell heater 8 is arranged on an inner side of the godet shell 7, which heats the godet shell 7 during operation of the godet 1. The godet shell 7 encloses the godet shell heater 8 in a front area B of the godet 1. This means that the godet shell 7 sits directly above the godet shell heater 8.

[0054] In the illustrated embodiment, the godet shell heater 8 is an induction heater. Specifically, the illustrated embodiment uses a four-zone heater. This allows different areas of the godet 1 to be heated differently. Alternatively, the godet shell heater 8 can also have only one zone or a different number of zones.

[0055] The godet drive motor 2 is arranged in a section A of the godet 1, which is part of the area B of the godet 1 enclosed by the godet shell 7. Thus, the godet drive motor 2 is arranged in the same axial area of ​​the godet 1 as the godet shell heater 8.

[0056] The second bearing 42 of the motor bearing 4 is also arranged in the area B of the godet 1 enclosed by the godet casing 7 and thus directly in the area of ​​the occurring load.

[0057] In the illustrated embodiment, the motor bearing 4 is also the godet sleeve bearing.

[0058] The godet drive motor 2 and the motor bearing 4 are arranged in the interior of a support 9 of the godet 1. In the illustrated embodiment, the support 9 is rotationally symmetrical.

[0059] A stator 22 of the godet drive motor 2 is attached to an inner wall of the support 9. The godet drive motor 2, together with its two bearings, is located inside the godet casing 7.

[0060] The godet jacket heater 8 is located above the support 9 and around a support insert 91.

[0061] The rotor 21 of the godet drive motor 2 is held on the drive shaft 5 by inner rings of the ball bearings 41, 42. The stator 22 of the godet drive motor 2 is held in a support bushing by outer rings of the ball bearings 41, 42.

[0062] The support 9 has an annular cross-section, meaning it is hollow inside so that the godet drive motor 2 can be accommodated within it. In the embodiment shown, the support 9 is made of aluminum.

[0063] The carrier 9 has a carrier insert 91 with a smaller outer cross-section and a carrier attachment 92 with a larger outer cross-section.

[0064] The support insert 91 has a length C. It is arranged in a region of the godet 1 that is enclosed by the godet shell 7, with the support insert 91 being provided around the drive shaft 5. The support insert 91 is located between the godet drive motor 2 and the godet shell heater 8.

[0065] In the illustrated embodiment, two Teflon rings 15, 16 are mounted on the support 9 at a distance from each other, creating a gap between the support 9 and the godet jacket heater 8. Air 14 is located at this gap.

[0066] The support attachment 92 is located on the front side of the godet shell 7 and thus in the area not enclosed by the godet shell 7.

[0067] In the illustrated embodiment, a motor cooling system is integrated as a fluid cooling system 3 into the material of the carrier 9, i.e., into the cylinder wall of the carrier 9. The fluid cooling system 3 extends almost over the entire longitudinal extent of the carrier 9. This means that, in the illustrated embodiment, the fluid cooling system 3 is provided both in the carrier insert 91 and in the carrier attachment 92. The fluid cooling system 3 is therefore always provided in a region of the carrier 9 located between the godet drive motor 2 and the godet jacket heater 8.

[0068] The fluid cooling 3, as well as the godet drive motor 2 and the motor bearing 4, is thus located in an area enclosed by the godet casing 7.

[0069] In the embodiment shown, the fluid cooling 3 is a water cooling system which is supplied with water via a water connection 31 which leads into the godet 1 at a region remote from the godet shell 7.

[0070] By means of the support insert 91 running between the godet drive motor 2 and the godet jacket heater 8, the godet drive motor 2 is at least partially shielded from the heat radiation of the godet jacket heater 8 and is additionally cooled by the fluid cooling 3 running in the material of the support insert 91.

[0071] The carrier 9 is shown in a perspective top view in Figure 2 The support insert 91 is cylindrical and has a smaller diameter than the support attachment 92. The support attachment 92 adjoins the support insert 91.

[0072] The fluid cooling 3 is in the embodiment shown by a, for example, in Figure 3shown cooling coil 30 is formed.

[0073] The cooling coil 30 comprises a coiled tube with a supply line 31 and a return line 32 for a cooling fluid. In the embodiment shown, the supply line 31 and the return line 32 are located next to each other, being equidistant from each other along the coiled tube's spiral. Connections for the supply line 31 and the return line 32 are provided at the beginning of the coiled tube. At one end 33 of the coiled tube, it is deflected so that the supply line 31 and the return line 32 are connected to each other.

[0074] The supply line 31 and the return line 32 of the cooling system are located next to each other in the same cylindrical plane of the support 9.

[0075] In the embodiment shown, the coiled tube is a steel tube that is cast into the material of the support 9.

[0076] In other embodiments of the present invention, not shown, at least one further coil, in which a medium other than the cooling fluid is guided, can run parallel to the coiled cooling tube in the material and / or on an inner wall of the carrier 9.

[0077] Thermocouples 81 are provided in or beneath the godet casing 7. The connecting cables of the thermocouples 81 are connected to a transducer 80. In the illustrated embodiment, the transducer 80 has a rotatable part 82, which is attached to the drive shaft 5, and a stationary part 84, which is attached to the carrier 9. An air gap 83, through which signal transmission takes place, exists between the rotatable part 82 and the stationary part 84 of the transducer 80.

[0078] On the drive shaft 5, at one end of the carrier 9, but still within the carrier 9, there is a fan wheel 12 which rotates with the drive shaft 5.

[0079] A seal 13 is arranged on the drive shaft 5 between the bearing 42 and the fan wheel 12.

Claims

1. Godet (1) comprising a godet drive motor (2), a motor bearing (4), a rotatably mounted drive shaft (5) driven or drivable by the godet drive motor (2), arranged centrally on the godet (1) and aligned in the axial direction of the godet (1), wherein a rotor (21) of the godet drive motor (2) is fastened to a circumferential region of the drive shaft (5), a godet coat (7) connected to the drive shaft (5), a godet coat heater (8) enclosed by the godet coat (7), and at least one cooling means, characterized in that at least a part of the godet drive motor (2), of the motor bearing (4), and of at least one fluid channel of the cooling means are arranged in a section (C) of a region (B) of the godet (1) enclosed by the godet coat (7), where the godet coat heater (8) is also arranged, wherein the godet drive motor (2) is arranged in the same axial region of the godet (1) as the godet coat heater (8).

2. Godet according to claim 1, characterized in that the at least one part of the godet drive motor (2) and of the motor bearing (4) are arranged in an interior of a carrier (9) and the at least one fluid channel between the godet drive motor (2) and the godet coat heater (8) runs through the material of the carrier (9).

3. Godet according to one of the preceding claims, characterized in that the cooling means comprises a coiled tube with a forward flow line (31) and a return flow line (32) arranged next to one another for a cooling fluid.

4. Godet according to claim 3, characterized in that the forward flow line (31) and the return flow line (32) lie on the same diameter in the material and / or on an inner wall of the carrier (9), and / or that the forward flow line (31) and the return flow line (32) lie on diameter steps offset to one another in the material and / or on an inner wall of the carrier (9), and / or that the forward flow line (31) and the return flow line (32) lie in the material and / or on an inner wall of the carrier (9) running conically together or away from one another.

5. Godet according to claim 3 or 4, characterized in that the coiled tube is a steel tube cast into the material of the carrier (9).

6. Godet according to one of claims 3 to 5, characterized in that parallel to the coiled tube of the cooling means at least one further coil, in which a medium other than the cooling fluid is guided, runs in the material and / or on an inner wall of the carrier (9).

7. Godet according to one of claims 2 or 4 to 6, characterized in that the carrier (9) is made of metallic and / or mineral material.

8. Godet according to one of claims 2 or 4 to 7, characterized in that the carrier (9) comprises a carrier insert (91) which is recessed into the region (B) of the godet (1) enclosed by the godet coat (7), and a carrier attachment (92) on which the godet coat (7) sits.

9. Godet according to claim 8, characterized in that a distance in which air (14) is located is created between the godet coat heater (8) and the carrier (9) by at least one spacer (15, 16).

10. Godet according to one of claims 2 or 4 to 9, characterized in that a fan wheel (12) is seated on the drive shaft (5), inside the carrier (9), which fan wheel (12) rotates with the drive shaft (5).