Rieter Ingolstadt Spinnereimaschinenbau Ag

Manfred Knabel

Edmund Schuller

Erich Bock

Josef Breitenhuber

Gallus Lindner

An open-end spinning device () with a spinning rotor () whose shaft end () is supported by an aerostatic axial bearing () with an air gap () located between a bearing plate () of the axial bearing () and the shaft end (). The aerostatic axial bearing () comprises a bearing plate () and a throttle device () made from a porous graphite material placed before the bearing plate (). The throttle device () is an stamped pressed, tablet-shaped molding with largely homogenous porosity. In a process for manufacturing an aerostatic axial bearing () for a spinning rotor () of an open-end spinning device (), a throttle device () made from a porous graphite material is placed before the axial bearing (). The throttle device () is stamped pressed in a press tool as a tablet-shaped molding.

Open-end spinning device with an aerostatic axial bearing for a spinning rotor, an aerostatic axial bearing and a process for manufacturing an aerostatic axial bearing

To improve the known step bearings for the support of open-end spinning rotors, it is proposed to design the bearing body with a machine-side support and a rest for the spinning rotor. According to the invention, a flat bearing surface constituting one end of the bearing body is provided as the rest for the spinning rotor. The flat bearing surface is preferably designed as a bearing plate of an aerostatic step bearing capable of being subjected to compressed air.

Step bearing for axial support of an open-end spinning rotor

Proposed is a support disk bearing for an open-end spinning rotor. The support disk possesses a body, which, on its circumferential surface, is designed to receive a cover layer. The cover layer is comprised of rubber, in particular nitrile rubber (NBR). In an advantageously favorable formulation, the cover layer contains an additive for the reduction of its electrical resistance.

Support disk for a support disk bearing for spin rotors

The present invention concerns a procedure for the reworking of a open-end spinning apparatus for a spin rotor, which is carried in the V-notch between support disks and is supported by a ball axial thrust bearing. Where the reworking is concerned, the bearing block of the open-end spinning apparatus is dismounted, the ball axial thrust bearing is removed from the bearing block and in accord with the invention, is replaced by an aerostatic bearing in the bearing block.

Procedure and an apparatus for the reworking of open-end rotor spinning apparatuses

An open-end spinning apparatus has a spin rotor ( ) which, by means of its shaft ( ) is supported by support plates ( ), wherein as an abutment for the axially directed force on the spin rotor ( ), an aerostatic axial bearing ( ) is provided. The bearing surface ( ) of the spin rotor ( ) operates together with a bearing plate ( ) of the axial bearing ( ). The bearing surface ( ) or the bearing plate ( ) are comprised of a construction material of polyimide. Advantageously, the polyimide is combined with an additive, namely graphite, for instance.

Bearing composition for a open-end spin rotor

For a bearing arrangement of an open-end spin rotor, which is rotatably set in the &ldquo;V&rdquo; between circumferential rims of support disks, one or more of the support disks (,), which bear the open-end spin rotor, has a circumferential cleaning groove (,). The cleaning groove (,) can be a self closing, endless groove, which runs over the contact surface of the support disk (,), wherein it generally does not run parallel to the edges of the support disk (,). Such a meandering groove formulation of the support disk circumference assures that no deposits of impurities can accumulate on the rotor shaft.

Bearing arrangement with cooling groove for an open-end spin rotor using support disks

For an aerostatic bearing (6) of an open-end spinning rotor, in which the bearing material consists of a wearable material, a wear indicator (9) is provided on the bearing plate (601) of the axial bearing (6) so that the state of wear of the axial bearing (6) can be checked by simple optical inspection. The wear indicator (9) can be integrated into the running surface (610) and be made e.g. in the form of a blind bore (91), so that the presence of the bore indicates that the wear lies still within the admissible limits.

Aerostatic bearing for open-end spinning device

An aerostatic axial bearing (6) of an open-end spinning machine in which the bearing plate (601) of the axial bearing (6) is made of a permeable material, has a bearing plate (601) provided with one or several air channels (605), the task of which is to convey the air closer to the bearing gap (630) before it goes through the permeable bearing plate material. Thereby, the utilization of an additional choke can be avoided. Furthermore the mechanical properties of the holder bearing plate (601) are improved.

Bearing for an open-end spinning device

An open-end spinning device with a spinning rotor is supported by a shaft in a bearing arrangement. An axially rearwardly directed force is exerted on the rotor shaft in operation of the spinning device. The end of the rotor shaft bears against an aerostatic bearing which includes a bearing surface oppositely facing the end of the rotor shaft made of a carbon material. The rotor shaft has a bearing surface defined on the end thereof opposite the aerostatic bearing which is made at least in part of a carbide material.

Bearing arrangement for an open-end spinning device

Bearing arrangement for an open-end spinning machine has a bearing block attached to bearing supports defined on the machine frame. A seat is defined in the bearing block for receipt of an axial bearing. An intermediate support structure member is removably attached to the bearing block and supporting ring bearings. The intermediate support structure is removable from the bearing block with the supporting ring bearings while the bearing block remains attached to the machine frame through bearing supports.

Bearing arrangement for an open-end spinning rotor

An open-end spinning device has a spinning rotor with a rotor pot defining a fiber collection groove therein. A rotor shaft is provided having a diameter between 5.5 mm and 9 mm. Pairs of rotatable supporting rings supported on axles define a nip therebetween. The rotor shaft is rotatably supported in the nip. The supporting rings have a diameter between 62 mm and 82 mm. A thrust imparting device imparts an axial thrust to the rotor shaft in the direction opposite the rotor pot. A non-contacting axial bearing is disposed opposite the free end of the rotor shaft for absorbing the axial thrust without contacting the rotor shaft. The axial thrust imparting device generates an axial thrust between 1N and 7N on the rotor shaft. A driving device contacts the rotor shaft for rotatably driving the rotor and has a contact pressure with the rotor shaft from between 8N and 39N.

The spinning rotor of an open-end spinning device is supported by means of a rotor shaft in the nip of at least one pair of supporting disks and can be driven by means of a tangential belt. A change-over device with a pressure roller is provided to press the tangential belt against the rotor shaft and a rotor brake which can be brought into action alternatively is provided. The change-over device is connected to a control lever which can be controlled as a function of the position of an actuator connected to a spinning station cover. The control lever is provided with an actuating arm. By opening the spinning station cover completely, a sufficient clearance can be produced between the actuator and the control lever so that the rotor brake can be deactivated through action exerted on the actuating arm of the control lever by means of the change-over lever on the one hand without allowing on the other hand the pressure roller to be yet actuated. The control lever can be made in several segments, with a first lever segment being connected to the change-over device and interacting with the actuator of the spinning station cover, while a second lever segment is provided with the actuating arm and interacts with the first lever segment.

Open-end spinning device

An open-end spinning machine having a spinning rotor attached to a shaft is provided wherein the shaft of the spinning rotor is driven by driving means. The shaft of the spinning rotor is held in the nips of pairs of rearward and forward supporting disks. During spinning operations, an axial force is generated in the axial direction of the free end of the rotor shaft. The open-end spinning device further comprises a radial support surrounding at least a portion of the circumference of the rotor shaft and disposed at least in part in the area between the free end of the shaft and the area of the shaft acted upon by the rearward pair of disks.

Guide for the shaft of an open-end spinning rotor

An open-end spinning machine having a spinning rotor attached to a shaft is provided wherein the shaft of the spinning rotor is driven by a driving device. The shaft of the spinning rotor is held in the nips of pairs of rearward and forward supporting disks. During spinning operations, an axial force is generated in the axial direction of the free end of the rotor shaft. The open-end spinning device further comprises a radial support surrounding at least a portion of the circumference of the rotor shaft and disposed at least in part in the area between the free end of the shaft and the area of the shaft acted upon by the rearward pair of disks.

Growing community of inventors

Ingolstadt, Germany

Manfred Knabel