Spinning Rotor for an Open-End Spinning Machine having a Friction-Enhancing Lining Made of an Elastomeric Material, and Open-End Spinning Machine

Abstract

A spinning rotor for an open-end spinning device includes a rotor shaft, via which the spinning rotor is driven with the aid of a belt. A contact area is on the rotor shaft for engagement with the belt. A friction coefficient-increasing lining made of an elastomeric material is applied along at least part of the contact area.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a spinning rotor for an open-end spinning device, comprising a rotor shaft, via which the spinning rotor is driven with the aid of a belt, in particular, a tangential belt. The rotor shaft includes a contact area for the belt.BACKGROUND[0002]With respect to spinning rotors of open-end spinning machines, it has been common for a long time to drive these spinning rotors with the aid of a tangential belt which rests against the shaft of the spinning rotor. The spinning rotors are usually mounted on support disks in this case. The belt is generally pressed against the rotor shaft in this case with the aid of an additional drive roller in order to reduce the slip between the belt and the rotor shaft. In this case, it can also be provided to change the contact pressure of the pressure roller in order, for example, to provide for a faster ramp-up of the spinning rotors or to enable an adaptation to different spinning materials or...

AI Technical Summary

Benefits of technology

[0010]Moreover, it is advantageous when the lining has a lining thickness of at most 1 mm, preferably at most 0.75 mm and, particularly preferably, at most 0.5 mm. The flexing work in the rotor drive and, therefore, the energy consumption, can be further reduced as a result.

[0011]Moreover, it is advantageous when the at least one recess is designed as at least one circumferential groove. In the simplest variant, the circumferential groove can be designed as a rectangular groove in this case, into which the plastic material has been introduced, in particular, via vulcanization. The lining is subjected to only slight wear as a result. In this case, it is also advantageous when the lining thickness is at most 1 mm, preferably at most 0.75 mm and, particularly preferably, at most 0.5 mm. The depth of the recess can be limited as a result and a weakening of the spinning rotor, which would reduce its characteristic frequency and result in undesirable oscillations during operation, can be avoided as a result. In this embodiment as well, the lining can be continuously applied or in the form of interspaced strips or rings.

[0012]In order to provide a preferably smooth outer surface of the rotor shaft and, therefore, a preferably planar support surface for the belt, it is furthermore advantageous when the rotor shaft, including the introduced lining, is ground. As a result, the force transmission between the belt and the rotor shaft can be improved and wear of the belt and of the rotor shaft can be reduced.

[0013]It is particularly advantageous when the lining is made of nitrile rubber or of hydrogenated acrylonitrile butadiene rubber. This not only has the friction and damping properties which are favorable for the operation of the spinning rotor, but is also antistatic, and so trash deposits in the area of the lining can be avoided. A close fit of the belt on the rotor shaft and, therefore, good force transmission between the belt and the rotor are further enhanced as a result. It is also conceivable, however, that the lining is made of a polyurethane elastomer or a natural rubber. These also have a favorable friction coefficient with respect to the drive belt and therefore provide for an energy-saving and low-wear operation of the open-end spinning device.

[0014]It is also advantageous when the rotor shaft is made of a metal, in particular, an aluminum material or a steel material. The heat, which still forms in the lining due to the flexing work between the belt and the lining, can be dissipated in a particularly favorable way as a result.

[0015]Such a spinning rotor comprising a rotor shaft which is provided with a friction coefficient-increasing material in its contact area can be utilized particularly advantageously for the energy-saving and low-maintenance operation of an open-end spinning device. Therefore, protection for an open-end spinning device comprising such a spinning rotor is also claimed.

Problems solved by technology

Due to the slip between the belt and the rotor shaft, wear can occur on the belt as well as the spinning rotor, however, despite the pressure roller.

Due to a wear of the belt, however, there may nevertheless be an insufficient force transmission between the belt and the rotor shaft, and so the spinning rotors can only be accelerated very slowly or may never even reach their operating speed.

This results in increased flexing work in the lining of the support disks, which results in considerable energy consumption in the area of the rotor bearing.

Images