EP4033017A1 - Floating spinning ring bearing - Google Patents

Abstract

The invention relates to a spinning ring bearing, in particular for a ring spinning or ring twisting machine, with a spinning ring and a spinning ring support ring which are arranged coaxially to a spindle axis and with the spinning ring being arranged in a floating manner at a vertical distance above the spinning ring support ring. In order to provide a spinning ring bearing and a spinning machine with a spinning ring bearing that enables simple and reliable positioning of the floating spinning ring, it is provided that the spinning ring support ring has a guide ring arranged coaxially and at a distance from a spinning ring peripheral surface.

Description

• einem Spinnring und einem Spinnringstützring, die koaxial zu einer Spindelachse angeordnet sind, wobei der Spinnring schwebend vertikal beabstandet oberhalb des Spinnringstützrings angeordnet ist.

The invention relates to a spinning machine, in particular a ring spinning or ring twisting machine for producing a yarn, with a spinning ring bearing for the coaxial arrangement of a spinning ring relative to a spindle axis and a spinning ring bearing, in particular for a ring spinning or ring twisting machine

• a spin ring and a spin ring support ring coaxial with a spindle axis, the spin ring being suspended vertically spaced above the spin ring support ring.

Spinning ring bearings of the type mentioned above and spinning machines with such spinning ring bearings are, for example, from the EP 3 231 904 A1 known. In order to solve the known problem of friction on ring spinning machines with ring traveler systems, in which the ring traveler is destroyed with increasing spindle speed due to the heat generated by the friction between the yarn and the ring traveler, it is already known that the ring traveler can be dispensed with entirely and the spinning ring provided for guiding the yarn on the outside, to be arranged floating contactlessly in a magnetic field. The omission of a conventional ring traveler system makes it possible to operate the spinning machines at spindle speeds that are significantly higher than the speeds of known ring traveler systems. There is no limitation of the spindle speed due to the friction conditions between the ring traveler and the yarn to be produced.

However, known systems for the floating mounting of the spinning rings in a magnetic field have the disadvantage that they can only be produced with great effort due to the necessary use of nitrogen-cooled superconductors due to the cooling required and are hardly suitable for industrial operation, e.g. also because significant amounts of energy are required to produce and store the liquid nitrogen required for cooling. In addition, there is the problem with the known systems for floating mounting of the spinning rings that these are insufficient in the radial direction, i. H. are aligned perpendicular to the spindle axis direction opposite to the yarn tube.

Proceeding from this, the object of the invention is to provide a spinning ring bearing and a spinning machine with a spinning ring bearing that has a simple and reliable Positioning of the floating spinning ring allowed.

The invention solves the problem by a spinning ring bearing with the features of claim 1 and by a spinning machine with the features of claim 10. Advantageous developments of the spinning ring bearing are specified in the dependent claims 2 to 9.

The spinning ring bearing according to the invention has a spinning ring which is arranged coaxially to a spindle axis and whose outer spinning ring peripheral surface is designed to guide a yarn to be wound up on a yarn tube. The yarn is guided past the peripheral surface of the spinning ring along the underside of the spinning ring to the yarn tube, which extends through a central opening in the spinning ring. The spinning ring is held in suspension above the spinning ring support ring and is therefore supported without contact. In the context of the application, terms such as "above" and "below" refer to the operating position of the spinning ring bearing on a spinning machine, with the functional principle of the spinning ring bearing being based on the non-contact bearing created between the spinning ring and the support ring, e.g. created by an air cushion , counteracts the weight of the spinning ring and keeps it suspended.

Characteristic of the spinning ring bearing according to the invention is a guide ring arranged coaxially and at a distance from a peripheral surface of the spinning ring. The guide ring is therefore at least partially - arranged coaxially to the spinning ring - viewed in the direction of the spindle axis - and provides a support surface that can be brought into engagement with the spinning ring peripheral surface via its inner surface, whereby the spinning ring can be moved in the radial direction, i. H. perpendicular to the spindle axis, is held and guided in its position. The distance between the peripheral surface of the spinning ring and the guide ring in the form of an air gap ensures reliable guidance of the yarn along the peripheral surface of the spinning ring during the spinning process.

In cooperation with the guide ring, which can be connected to the support ring, formed in one piece with it, but also arranged at a distance from it, the spinning ring peripheral surface thus ensures mechanical guidance and thus stable and simple mounting of the spinning ring in the radial direction compared to one on a spindle arranged twine tube. The bearing is particularly simple and stable and can be produced particularly inexpensively. The spinning ring bearing thus allows particularly high Spindle speeds, as a result of which a particularly high productivity of a spinning machine equipped with a spinning ring bearing according to the invention can be achieved. The spinning ring itself does not rotate or only rotates at a speed that is significantly lower than the spindle speed around the spindle axis.

The configuration of the spinning ring bearing for the floating arrangement of the spinning ring can in principle be freely selected. For example, the spinning ring bearing can be designed in such a way that the spinning ring is positioned in a floating manner relative to the spinning ring support ring via an air cushion generated by compressed air. According to a particularly advantageous embodiment of the invention, however, it is provided that the spinning ring, which is formed, for example, from a volatile, permanently magnetizable or non-magnetizable material, is arranged vertically above the spinning ring support ring in the direction of the spindle axis via a magnetic field.

The magnetic field generated between the spinning ring support ring and the spinning ring causes a holding force that opposes the weight of the spinning ring and causes the spinning ring to float in its position of use. The use of a magnetic field represents a particularly convenient configuration for the non-contact mounting of the spinning ring relative to the spinning ring support ring, which can also be produced particularly inexpensively.

To ensure reliable mounting of the spinning ring in the radial direction, it is already sufficient if the guide ring is arranged coaxially with the spinning ring, at least in sections, starting from the spinning ring support ring. Accordingly, the spinning ring support ring together with the guide ring forms a cup-like guide, with the spinning ring being guided in the axial direction via the magnetic field advantageously provided between the spinning ring and the spinning ring support ring and in the radial direction via a section of an inner surface of the spinning ring support ring and the spinning ring peripheral surface.

According to a particularly advantageous embodiment of the invention, however, it is provided that the guide ring extends from the spinning ring support ring to an area above the spinning ring. According to this embodiment of the invention, the inner surface of the guide ring facing the peripheral surface of the spinning ring extends, starting from the spinning ring support ring, in the direction of the spindle axis to an area above the upper edge of the spinning ring. This embodiment of the invention ensures particularly reliable radial guidance of the spinning ring within the guide ring, with the inner surface of the guide ring also providing additional guidance for the yarn produced in the manner of a balloon limiter sleeve. Like the inner surface of a balloon limiter sleeve, the inner surface of the guide ring supports the yarn on the section between, for example, a drafting system outlet and the spinning ring and thus ensures reliable support of the centrifugal forces acting on the yarn during the spinning process.

The advantageously provided magnetic field between the spinning ring support ring and the spinning ring can basically be generated in any way. For example, the use of electromagnets is conceivable here, by means of which u. depending on the adjustable current, the distance between the spinning ring and the spinning ring support ring is adjustable. According to a particularly advantageous embodiment of the invention, however, it is provided that the spinning ring and the spinning ring support ring have permanent magnets arranged opposite one another in the direction of the spindle axis and arranged in a repelling manner.

According to this embodiment of the invention, permanent magnets are arranged on the spinning ring support ring and the spinning ring, preferably on the facing surfaces of the spinning ring and spinning ring support ring, in such a way that matching poles face each other. The resulting repulsion between the permanent magnets generates a magnetic field that counteracts the weight of the spinning ring, so that it can be held in suspension relative to the spinning ring support ring. The use of permanent magnets is characterized in that they allow a particularly simple and cost-effective production of a magnetic field that separates the spinning ring from the spinning ring support ring. Compared to the use of electromagnets, the use of permanent magnets also has the advantage that there is no need for a complex control and cable feed to the electromagnets.

The configuration of the permanent magnets and their arrangement on the spinning ring and the spinning ring support ring can in principle be freely selected. For example, there is the possibility of attaching individual magnets to the spinning ring and the spinning ring support ring over a matching circumference coaxially to the spindle axis, which ensure reliable axial spacing of the spinning ring relative to the spinning ring support ring. There is also the option of using the permanent magnets on the spinning ring support ring and the spinning ring to arrange deviating circumferences, so that the magnetic field generated between the permanent magnets also applies a radial force component to the spinning ring, whereby it can also be positioned in the radial direction via the magnetic field.

According to a particularly advantageous embodiment of the invention, however, it is provided that the spinning ring and the spinning ring support ring each have a ring permanent magnet arranged coaxially to the spindle axis and opposite in the direction of the spindle axis, which are aligned to repel one another. The use of ring permanent magnets ensures in a particularly reliable manner a permanently constant magnetic field between the spinning ring and the spinning ring support ring and thus ensures a particularly precise positioning of the spinning ring above the spinning ring support ring.

According to a further embodiment of the invention, it is provided that the spinning ring and the guide ring have permanent magnets arranged opposite one another perpendicularly to the spindle axis and aligned in a repelling manner. According to this embodiment of the invention, in addition to the magnetic field positioning the spinning ring in the direction of the spindle axis relative to the spinning ring support ring, another magnetic field acting in the radial direction is generated between the spinning ring and the guide ring. H. leads in the radial direction relative to the spindle axis and is thus spaced apart with its spinning ring peripheral surface relative to the inner surface of the guide ring. This embodiment of the invention thus makes it possible in a particularly reliable manner to arrange the spinning ring with its spinning ring peripheral surface at a permanent distance from the inner surface of the spinning ring support ring, so that the yarn to be guided through between the spinning ring peripheral surface and the guide ring is then guided particularly reliably along the underside of the spinning ring to the yarn tube. The supplementary magnetic field ensures that the spinning ring and guide ring are reliably spaced apart. It is particularly advantageously provided that the spinning ring and the guide ring each have a ring permanent magnet which is arranged coaxially to the spindle axis and is arranged opposite one another perpendicularly to the spindle axis and which are arranged repelling one another. The use of ring permanent magnets both on the guide ring and on the spinning ring ensures a particularly reliable radial guidance of the spinning ring during the spinning operation.

According to a particularly advantageous embodiment of the invention, it is provided that the radial distance between the spinning ring and the guide ring is 0.05 mm to 5 mm, preferably 0.25 mm is up to 1.5 mm. After the yarn is guided on the outside of the spinning ring and then reaches the sleeve between the spinning ring support ring and the spinning ring, the spinning ring tends to tilt due to the thread tension of the yarn. Since spinning may be impossible in a tilted constellation, it may be necessary to prevent a corresponding tilting. This can be achieved via the advantageously described use of permanent magnets on the spinning ring and the guide ring which are arranged opposite one another perpendicularly to the spindle axis and are oriented in a repelling manner. In addition or as an alternative, the advantageously provided particularly small difference in diameter between the outer surface of the spinning ring and the inner surface of the guide ring may only ensure slight tilting, with the spinning ring possibly being supported at two diagonally opposite points on the inner surface of the guide ring. Since the yarn rotates in the guide ring and there is enough space between the spinning ring and the guide ring apart from the aforementioned support points, the yarn can move there and is not clamped, so that a reliable spinning process can be additionally ensured.

In order to ensure a corresponding diagonal support of the spinning ring relative to the guide ring in a particularly reliable manner in the event of the spinning ring tilting, a particularly advantageous embodiment of the invention provides that the diagonal diameter of the spinning ring is larger than the diameter of the guide ring. According to this embodiment of the invention, the diagonal diameter of the spinning ring, namely the diameter with which the spinning ring is supported on the guide ring at two diagonally opposite points, is larger than the diameter of the guide ring. This configuration ensures in a particularly reliable manner that, if the spinning ring tilts, it rests against the inside of the guide ring, so that the spinning process continues in a particularly reliable manner even if tilting occurs.

The invention also achieves the object by means of a spinning machine, in particular a ring spinning or ring twisting machine for producing a yarn, with a spinning ring bearing for the coaxial arrangement of the spinning ring with respect to the spindle axis, the spinning ring bearing being designed in the manner described above according to the invention or developed further.

The spinning machine according to the invention can be due to the use of the above described according to the invention or further developed spinning ring bearing produce particularly easily and inexpensively. The spinning ring bearing allows the spinning machine to be operated at particularly high spindle speeds, as a result of which a spinning machine can be operated with particularly high productivity.

Fig. 1

eine schematische Darstellung einer ersten Ausführungsform einer Spinnringlagerung mit einem senkrecht zu einer Spindelachse ausgerichteten Spinnring;

Fig. 2

eine schematische Darstellung der Spinnringlagerung von Figur 1 mit einem verkippten Spinnring;

Fig. 3

eine schematische Darstellung einer zweiten Ausführungsform einer Spinnringlagerung mit einem senkrecht zur Spindelachse ausgerichteten Spinnring;

Fig. 4

eine schematische Darstellung der Spinnringlagerung von Figur 3 mit verkipptem Spinnring;

Fig. 5

eine schematische Darstellung einer dritten Ausführungsform einer Spinnringlagerung mit vertikal zur Spindelachse ausgerichteten Spinnring und

Fig. 6

eine schematische Darstellung der Spinnringlagerung von Figur 5 mit verkipptem Spinnring.

Embodiments of the invention are explained below with reference to the drawings. In the drawings show:

1

a schematic representation of a first embodiment of a spinning ring bearing with a spinning ring aligned perpendicular to a spindle axis;

2

a schematic representation of the spinning ring bearing of figure 1 with a tilted spinning ring;

3

a schematic representation of a second embodiment of a spinning ring bearing with a spinning ring aligned perpendicularly to the spindle axis;

4

a schematic representation of the spinning ring bearing of figure 3 with tilted spinning ring;

figure 5

a schematic representation of a third embodiment of a spinning ring bearing with the spinning ring aligned vertically to the spindle axis and

6

a schematic representation of the spinning ring bearing of figure 5 with tilted spinning ring.

In the figures 1 and 2 a first embodiment of a spinning ring bearing 1a is shown. The spinning ring bearing 1a has a guide ring 4a connected in one piece to a spinning ring support ring 3, which adjoins the spinning ring support ring 3 in an outer region and extends in the direction of the spindle axis 7, so that the spinning ring support ring 3 and the guide ring 4a form a pot-like receptacle. within which a spinning ring 2a is arranged coaxially to the spindle axis 7. For spacing the spinning ring 2a in the vertical direction, i.e. in the direction of the spindle axis above the spinning ring support ring 3, permanent magnets 8, 9 are arranged on the spinning ring support ring 3 and vertically opposite on the spinning ring 2a in such a way that a magnetic field with a repelling effect is generated between them, which the vertically acting weight of the spinning ring 2a counteracts and thus keeps the spinning ring 2a in relation to the spinning ring support ring 3 in suspension.

Perpendicular to the spindle axis 7, ie in the radial direction, the inner surface of the guide ring 4a forms a guide surface for the spinning ring peripheral surface of the spinning ring 2a, so that the guide ring 4a forms a mechanical guide for the spinning ring 2a in the radial direction. The distance between the peripheral surface of the spinning ring and the inner surface of the guide ring 4a is dimensioned such that a yarn 12 can be reliably guided past the peripheral surface of the spinning ring and between the spinning ring 2a and the spinning ring support ring 3 and then reliably wound onto a yarn tube 5 as a yarn winding 6. The radial distance between the peripheral surface of the spinning ring and the inner surface of the guide ring 2a is dimensioned in such a way that at least the yarn to be spun fits through, even if, as in figure 2 shown, the spinning ring 2a is tilted relative to the spindle axis 7, with a sufficient space for the yarn 12 possibly remaining due to a small difference in diameter between the outer surface of the spinning ring and the inner surface of the guide ring 4a.

In the Figures 3 and 4 Another example of a spinning ring bearing 1b is shown. In contrast to the one in the figures 1 and 2 Spinning ring bearing 1a shown are viewed in the vertical direction to the spindle axis 7 opposite to the guide ring 4b and the spinning ring peripheral surface arranged permanent magnets 10, 11, which generate a repelling magnetic field between the guide ring 4b and the spinning ring 2b. A magnetic field is thus generated via the permanent magnets 10, 11, which aligns the spinning ring 2b in the radial direction, ie perpendicular to the spindle axis 7 with respect to the spindle axis 7. The distance between the peripheral surface of the spinning ring 2b and the inner surface of the guide ring 4b is analogous to that in figure 1 and 2 illustrated embodiment dimensioned such that even with an in figure 4 illustrated tilted state of the spinning ring 2b, a reliable spinning process is ensured after sufficient space remains between the spinning ring 2b and the guide ring 4b in the tilted state, into which the yarn 12 can escape.

In the figures 5 and 6 Another embodiment of a spinning ring bearing 1c is shown, which differs from that shown in FIGS figures 1 and 2 Spinning ring bearing 1a shown differs in that the guide ring 4c extends from the spinning ring support ring 3 to an area above an upper edge of the spinning ring 2a. In the area above the spinning ring 2a, the inner surface of the guide ring 4c also serves as a guide for the yarn 12 figures 5 and 6 illustrated embodiment is the distance between the inner surface of the guide ring 4c and the peripheral surface of the spinning ring Spinning ring 2a dimensioned in such a way that even in the tilted, in figure 6 State shown, a sufficiently large space for the yarn 12 remains, so that it can be reliably wound as a yarn winding 6 on the yarn sleeve 5 during the spinning process.

Reference List

1a, 1b, 1c

spinning ring storage

2a, 2b

spinning ring

3

spinning ring support ring

4a, 4b, 4c

guide ring

5

yarn tube

6

yarn winding

7

spindle axis

8th

permanent magnet

9

permanent magnet

10

permanent magnet

11

permanent magnet

12

yarn

Claims (10)

Spinning ring bearing (1a, 1b, 1c), in particular for a ring spinning or ring twisting machine - a spinning ring (2a, 2b) and a spinning ring support ring (3) which are arranged coaxially to a spindle axis (7), the spinning ring (2a, 2b) being arranged in a floating manner at a vertical distance above the spinning ring support ring (3), marked by
a guide ring (4a, 4b, 4c) arranged coaxially and spaced from a peripheral surface of the spinning ring. Spinning ring bearing (1a, 1b, 1c) according to Claim 1, characterized in that the spinning ring (2a, 2b) is arranged in the direction of the spindle axis at a vertical distance above the spinning ring support ring (3) via a magnetic field. Spinning ring bearing (1a, 1b, 1c) according to Claim 1 or 2, characterized in that the guide ring (4a, 4b, 4c) extends from the spinning ring support ring (3) to an area above the spinning ring (2a, 2b). Spinning ring bearing (1a, 1b, 1c) according to one or more of the preceding claims, characterized in that the spinning ring (2a, 2b) and the spinning ring support ring (3) have permanent magnets (8, 9) arranged opposite one another in the direction of the spindle axis and aligned in a repelling manner. Spinning ring bearing (1a, 1b, 1c) according to one or more of the preceding claims, characterized in that the spinning ring (2a, 2b) and the spinning ring support ring (3) each have a ring permanent magnet ( 8, 9) oriented in a repelling manner. Spinning ring bearing (1a, 1b, 1c) according to one or more of the preceding claims, characterized in that the spinning ring (2b) and the guide ring (4a, 4b, 4c) have permanent magnets (10 , 11). Spinning ring bearing (1a, 1b, 1c) according to one or more of the preceding claims, characterized in that the spinning ring (2b) and the guide ring (4a, 4b, 4c) each have a coaxial to the spindle axis (7) and perpendicular to the spindle axis (7) oppositely arranged ring permanent magnets (10, 11) which are aligned to repel one another. Spinning ring bearing (1a, 1b, 1c) according to one or more of the preceding claims, characterized in that the radial distance between the spinning ring (2a, 2b) and the guide ring (4a, 4b, 4c) is preferably 0.05 mm to 5 mm is 0.25 mm to 1.5 mm. Spinning ring bearing (1a, 1b, 1c) according to one or more of the preceding claims, characterized in that the diagonal diameter of the spinning ring (2a, 2b) is larger than the inner diameter of the guide ring (4a, 4b, 4c). Spinning machine, in particular ring spinning or ring twisting machine for producing a yarn (12), with a spinning ring bearing (1a, 1b, 1c) for the coaxial arrangement of a spinning ring (2a, 2b) relative to a spindle axis (7),
characterized in that
the spinning ring bearing (1a, 1b, 1c) is designed according to one or more of claims 1 to 9.

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