DE2035209B

DE2035209B - Drive roller to drive a magnetically mounted rotating tube

Info

Publication number: DE2035209B
Authority: DE
Inventors: Hans Peter 7000 Stuttgart; Kaiser Ernst 7054 Korb Langer
Original assignee: SKF Kugellagerfabriken GmbH
Current assignee: SKF GmbH

Description

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Es zeigt F i g. 1 ein Ausführungsbeispiel einer Falschdrallvorrichtung, die mit Antriebsrollen ausgestattet ist, die erfindungsgemäß ausgebildete Reibbeläge aufweisen, in der Draufsicht gesehen, F i g. 2 einen Längsschnitt der Vorrichtung gemäß F i g. 1, entlang der Linie 2-2 der F i g. 1, An exemplary embodiment of the invention is shown in the drawing. It shows F i g. 1 shows an embodiment of a false twist device, which with Is equipped with drive rollers that have friction linings designed according to the invention, seen in plan view, F i g. 2 shows a longitudinal section of the device according to FIG G. 1, taken along line 2-2 of FIG. 1,

F i g. 3 einen durch einen strichpunktierten Kreis angedeuteten Ausschnitt der F i g. 2, in wesentlich größerem Maßstab als diese Figur, F i g. 4 in Ansicht die Oberfläche eines Reibbelages der Antriebsrollen der Vorrichtung in abgewickeltem Zustand. F i g. 3 a section indicated by a dash-dotted circle the F i g. 2, on a much larger scale than this figure, FIG. 4 in view the surface of a friction lining of the drive rollers of the device in unwound Status.

In den F i g. 1 und 2 ist eine bei der Herstellung von Kräuselgarnen verwendbare Texturiervorrichtung dargestellt, mit welcher einem synthetischen Faden mit durch das Spinnverfahren bedingter und für viele Anwendungen unerwünschter glatter Struktur, beispielsweise einem mehrfibrilligen Polyamidgarn, nach dem sogenannten Falschdrallverfahren ein Falschdraht erteilt wird, welcher dem Faden, gegebenenfalls nach Fixierung durch Wärmeeinwirkung, eine schraubenförmig gekräuselte Struktur verleiht, die dem Garn hohe Elastizität, starke Bauschigkeit und gutes Wärmeisolationsvermögen gibt. In the F i g. 1 and 2 is one in the manufacture of crimped yarns usable texturing device shown, with which a synthetic thread with smoother due to the spinning process and undesirable for many applications Structure, for example a multi-fibril polyamide yarn, according to the so-called False twist method a false twist is given, which the thread, if necessary after fixation by the action of heat, a helically curled structure which gives the yarn high elasticity, strong bulk and good thermal insulation properties are.

Hierzu durchläuft der Faden ein rasch rotierendes Drehröhrchen 10, das an einem Ende in einer Querbohrung einen Stift trägt, um den der zu kräuselnde Faden herumläuft. Das Drehröhrchen 10 wird von zwei Antriebsrollen 12, 14 angetrieben, die mit sehr hohen Drehzahlen umlaufen. Das Durchmesserverhältnis zwischen dem Drehröhrchen 10 und den Antriebsrollen 12, 14 liegt etwa in dem Bereich von 1:12 bzw. 1:19, so daß das Drehröhrchen mit hoher Geschwindigkeit rotiert. Die Antriebsrollen weisen jeweils an ihren Stirnenden durch Flansche gebildete Antriebsscheiben 16, 18 auf, die an ihrem Umfang einen Reibbelag 20 tragen. Derselbe ist aus einem elastisch nachgiebigen Material, insbesondere aus Kunststoff. An den Reibbelägen liegt das Drehröhrchen mit Umfangsteilen zur Mitnahme an. Die Antriebsrollen sind auf Wellen 22 bzw. 24 befestigt, die in Lagern 26 bzw. 28 gelagert und auf der anderen Seite der Lager mit Antriebswirteln 30 bzw. 32 versehen sind. Die Lager sind in einen Träger 34 eingeschraubt, der in nicht dargestellter Weise in der Texturiermaschine befestigt ist. Der Antriebswirtel 30 wird von einem hier ebenfalls nicht dargestellten umlaufenden Äntriebsriemen angetrieben, so daß die mit ihm über die Welle 22 verbundene Antriebsrolle mit der erforderlichen Drehzahl umläuft. An Stelle des Antriebswirtels 30 kann auch der Antriebswirtel 32 von dem Antriebsriemen angetrieben werden. In diesem Falle läuft dann die Antriebsrolle 14 um, und die Antriebsrolle 12 wird von dem Drehröhrchen 10 durch Reibung mitgenommen. For this purpose, the thread runs through a rapidly rotating rotating tube 10, which carries a pin in a transverse hole at one end, around which the one to be crimped Thread running around. The rotating tube 10 is driven by two drive rollers 12, 14, which rotate at very high speeds. The diameter ratio between the rotating tube 10 and the drive rollers 12, 14 is approximately in the range of 1:12 and 1:19, see above that the rotating tube rotates at high speed. The drive rollers point drive disks 16, 18 formed by flanges at their front ends, which wear a friction lining 20 on their circumference. The same is elastic from one Resilient material, especially made of plastic. This is due to the friction linings Rotary tubes with peripheral parts to take with you. The drive rollers are on shafts 22 and 24 attached, which are stored in bearings 26 and 28, respectively, and on the other side the bearings are provided with drive whorls 30 and 32, respectively. The camps are in one Carrier 34 screwed in, in a manner not shown in the texturing machine is attached. The drive wharve 30 is also not shown here by one revolving drive belt driven so that the connected to it via the shaft 22 The drive roller rotates at the required speed. Instead of Drive whirl 30, the drive wharve 32 can also be driven by the drive belt. In In this case, the drive roller 14 then rotates, and the drive roller 12 is of the rotating tube 10 taken along by friction.

Das Drehröhrchen 10 weist einen als Hohlzylinder ausgebildeten Schaft36 auf, der teilweise aus ferromagnetischem Material besteht. Die Vorrichtung verfügt in an sich bekannter Weise über mindestens einen nicht näher dargestellten Magnet, der als Permanentmagnet ausgebildet ist und mit dessen Hilfe das Drehröhrchen 10 zwischen den vier jeweils einen Reibbelag 20 aufweisenden Flanschen 16 bzw. 18 derart schwebend gehalten ist, daß dasselbe in den Spalt zwischen jeweils zwei der Flansche hineingezogen und somit an deren Belag zum Antrieb angepreßt wird. The rotating tube 10 has a shaft 36 designed as a hollow cylinder which partly consists of ferromagnetic material. The device has in a manner known per se via at least one magnet, not shown in detail, which is designed as a permanent magnet and with the help of which the rotary tube 10 between the four flanges 16 and 18 each having a friction lining 20 is held floating that the same in the gap between two of the flanges pulled in and thus pressed against the covering for the drive.

Die Reibbeläge 20 der einzelnen Flansche der Antriebsrollen sind an ihrer äußeren Umfangsfläche verhältnismäßig rauh ausgebildet. Eine derartige Oberflächenbeschaffenheit der Reibbeläge .gewährleistet einen störungsfreien Lauf des Drehröhrchens, was bewirkt wird durch einen besonders intensiven Antriebskraftschluß zwischen den Flanschen und dem Drehröhrchen, so daß ein Schlupf zwischen der getriebenen Antriebsrolle und dem Drehröhrchen bzw. The friction linings 20 of the individual flanges of the drive rollers are formed relatively rough on their outer circumferential surface. Such a one The surface quality of the friction linings ensures trouble-free operation of the rotating tube, which is caused by a particularly intensive drive force connection between the flanges and the rotating tube, so that a slip between the driven Drive roller and the rotating tube or

zwischen diesem und der mitgenommenen Antriebsrolle zumindest weitgehend ausgeschaltet und so sichergestellt ist, daß unterschiedliche Antriebsmomente nicht mehr störend wirksam werden können.between this and the driven drive roller at least largely switched off and so it is ensured that different drive torques do not can be more disruptive.

Aus F i g. 3 ist in extrem starker Vergrößerung die Oberflächenstruktur des Reibbelages im Querschnitt und in F i g. 4 in der Ansicht gezeigt. Es ist zu ersehen, daß die Oberflächenrauhigkeit durch Vertiefungen 38 bzw. Erhöhungen 40 gebildet ist, die in der Ansicht gemäß F i g. 4 der Außenumfangsfläche der Reibbeläge beispielsweise ein kreppartiges Aussehen verleihen, d.h., die Erhöhungen40 verlaufen ungleichförmig und haben beispielsweise die Gestalt von Schlieren. Wesentlich ist hierbei, daß die Erhöhungen 40 in gleichmäßiger Höhe am Umfang enden, so daß eine sichere Anlage des Drehröhrchens über die gesamte Mantellänge der Reibbeläge gewährleistet ist.From Fig. 3 is the surface structure in extremely high magnification of the friction lining in cross section and in FIG. 4 shown in the view. It's closed see that the surface roughness by depressions 38 or elevations 40 is formed, which in the view according to F i g. 4 of the outer peripheral surface of the friction linings for example, give a crepe-like appearance, i.e. the elevations40 are smooth irregular and have the shape of streaks, for example. Is essential here that the elevations 40 end at a uniform height on the circumference, so that a Safe installation of the rotary tube is guaranteed over the entire length of the friction linings is.

Claims

Claims: 1. Drive roller for driving a magnetically mounted Rotary tube of a false twist device, with one on the circumference of the drive roller provided friction lining made of plastic, d a -characterized in that the friction lining (20) has a roughness of 30 to 100, preferably 75 ll.

2. Drive roller according to claim 1, characterized in that the Roughness of the friction lining (20) form a uniform profile.

3. Drive roller according to claim 2, characterized in that the Profile is formed by a knurl, a cross knurl or a cord tool.

4. Drive roller according to claim 2, characterized in that the Profile ~ is cast on the circumference of the friction lining (20).

5. Drive roller according to claim 1, characterized in that the Surface of the friction lining (20) has a crepe-like appearance.

6. Drive roller according to claim 2, characterized in that the the profile forming recesses (38) cut into the outer circumferential surface are.

The invention relates to a drive roller for driving a magnetically mounted rotating tube of a false twist device, with one provided on the circumference Plastic friction lining.

In the case of false twist devices, the barrel of the rotating tube, the usually rotates at very high speeds, of particular importance. To a To achieve optimum smoothness, you had to use the circumferential surfaces of the Drive rollers of the device provided friction linings on which the rotary tube is applied under pressure under the action of a magnetic force, by grinding or precision turning designed as finely as possible. Despite the special surface quality that the friction linings was awarded on their peripheral surfaces, could in many cases be the desired The smooth running of the rotating tube cannot be achieved; rather, there had to be walking disorders be accepted, which is caused by a continuous, in the axial direction of the rotary tube occurring up and down with a small amplitude, through strong hopping or also expressed by brief buzzing after long breaks in the quiet run. These running disorders, especially the high speeds already mentioned for Faden disturbing weight could not be eliminated by one the entire bearing unit of the device as well as the rotating tube are precisely balanced has. Despite these measures, it was repeatedly found in test runs that that the running properties of the tested devices are always approximately 20 minutes test run deteriorated, i.e. i.e. after this time the rotating tube began the main thing is to hop.

Due to the fact that the running disorders only after a set a certain operating time, it was obviously suspected that the Running malfunctions of the rotating tube caused by the storage of the drive rollers where it was assumed that the high-speed roller drive takes place Bearing heating and the resulting change in bearing clearance and viscosity of the lubricant make the difference. Through extensive experiments However, no confirmation can be found for this assumption, rather it turned out that, seen from the barrel of the rotating tube, no conclusions about the existing one Bearing play and can be drawn on the condition of the bearings. It was in this Connection found that even with relatively poor storage of the Drive rollers and a rotating tube flawlessly even with a relatively large bearing play can run.

In continuing the experiments it was finally found that only the surface quality of the circumferential surface of the one pulled onto the drive rollers Friction linings determine the running behavior of the rotating tube. Realizing this could by the invention an optimal solution in the effort to reduce the running problems of the Turn off rotary tubes of false twist devices, to be found, and the Invention is that to solve the task at hand, the friction lining a Has a roughness of 30 to 100, preferably 75 p. This measure brings about the - extraordinarily high peripheral speed of the drive rollers a reliable one Entrainment of the rotating tube, so that the possibility of slippage between the the latter and the drive rollers at least almost turned off and thereby a Stabilization is achieved in the operating position of the rotary tube. Another The main advantage of the invention is that it is due to the achievable quiet rotating tube is possible, the same with much higher speeds to drive, and so a suitable surface structure of the friction linings is an increase in speed of at least 30 01, possible.

Experiments have shown that when using friction linings designed according to the invention on drive rollers, the bearing of which is obvious is bad or partially destroyed, despite these shortcomings, the rotary tube does not have any Shows running disorders.

Conveniently, the friction lining will be designed so that its roughness has a uniform profile. The same can be done with a knurl, a cross knurl or a cord tool can be formed. However, the profile can also be adjusted on the perimeter of the Be cast on the friction lining. In the latter case can be particularly advantageous Create drive conditions of the rotary tube when the surface of the friction lining has a crepe-like appearance. The das'Profil forming depressions can be in the Outer circumferential surface be cut, which can be seen, for example, by sub-center Turning off the circumferential surface of the friction lining can be produced in a simple manner.