DE102011117925A1 - Guiding roller for guiding thread within textile machine or melt spinning process, has roller bearing with outer guiding ring, where inner support ring and multiple rolling bodies are arranged between two rings - Google Patents

Abstract

The guiding roller has a roller bearing (1) with an outer guiding ring (2). An inner support ring (3) and multiple rolling bodies (4) are arranged between the two rings. A circumferential guiding groove (6) is formed on an outer periphery of the guiding ring.

Description

The invention relates to a guide roller for guiding a thread in a textile machine or melt spinning process according to the preamble of claim 1.

A generic leadership role is for example from the DE 42 25 690 A1 known.

The known guide roller has a pot-shaped guide casing, which is rotatably supported by a roller bearing on an axle. Here, a thread is guided on the circumference of the guide casing with contact.

Such guide rollers are usually held freely rotating on an axle carrier in order to divert the running thread between treatment units within a textile machine or a melt spinning process. Here, the drive of the guide roller takes place exclusively by the thread and the thread friction. In that regard, there is a desire to design the leadership role as low mass as possible, that the drive energy to be generated by the thread and thus the yarn friction is minimized. In the known leadership role in addition to the rolling bearing friction in addition to take into account the inertia of the guide shell.

From the DE 1 979 730 Furthermore, a leadership role is known, in which the guide shell is mounted directly on a plurality of juxtaposed rolling elements on an axle. This can indeed reduce the masses of the leadership to be accelerated, but with the disadvantage that no commercial rolling bearings are used. Due to unavoidable manufacturing tolerances between the axle carrier and the guide casing of the guide roller, increased frictional conditions occur during the bearing of the guide casing.

It is an object of the invention to provide a leadership role of the type mentioned, which is designed particularly low mass and low friction. In order to be able to lead a thread with as little thread friction as possible without slippage, even at higher speeds.

This object is achieved in that on the outer circumference of the guide ring, a circumferential Fadenführungsnut is formed.

Advantageous developments of the invention are defined by the features and feature combinations of the respective subclaims.

The invention is characterized in that commercially available rolling bearings can be used to guide the thread in the broadest sense. Here, the outer circumference of the guide ring of the roller bearing is previously designed such that a secure thread guide is possible. For this purpose, the guide ring on a circumferential Fadenführungsnut. There is thus the possibility that the precise production methods required for the production of low-friction rolling element pairings, which are known for roller bearings, can also be used advantageously for the guide roller. The guide roller is thus particularly suitable for being able to guide even threads with fine titers and relatively low angles of wrap slip.

In particular, in the management of synthetic multifilament yarns, the development of the invention is preferably used, in which the guide ring in the region of the guide groove has a wear-resistant thread contact surface. This makes it possible to avoid premature signs of wear on the circumference of the guide ring even at very high operating times.

It is proposed to form the thread contact surface of the yarn guide by a ceramic insert on the circumference of the guide ring or by a ceramic material of the guide ring. The formation of the guide ring made of a ceramic material also favors a further reduction in inertia.

In principle, however, it is also possible to form the thread contact surface of the yarn guide groove by a surface coating on the circumference of the guide ring.

The holder of the guide roller is carried out according to an advantageous embodiment of the invention such that the retaining ring of the rolling bearing has an inner fitting opening for receiving an axle carrier. The retaining ring can be so form-fitting or non-positively arranged rotationally fixed to the axle.

In order to keep the friction conditions between the rolling elements and the guide ring and the retaining ring constant, annular sealing plates are provided on both end faces of the rolling bearing, which produce an encapsulation of the rolling elements. Thus, in particular, the volatile components of the thread, which occur in the vicinity of the guide roller, keep away from the rolling elements.

The safety in the operation of such guide rollers is ensured in particular by the development of the invention, in which on one of the end faces of the bearing a cup-shaped housing is arranged, which covers the guide ring and which in the region of Thread guide groove has a thread opening. This creates a shielding of the rotating parts from the environment.

Depending on the wrap of the thread, the thread opening can be formed over an angular range of 60 to 200 °.

In practical use, especially the variant has proven in the leadership role, in which the guide ring, the retaining ring and the rolling elements are each formed of a ceramic material. This allowed high speeds in the range of above 10,000 U / min. be realized in the usual operating hours for textile machines or melt spinning processes.

In order to guide a plurality of threads simultaneously in a guide roller, the variant of the guide roller is preferably used, in which a plurality of mutually parallel Fadenführungsnuten are formed on the circumference of the guide ring. For this purpose, single-row or multi-row rolling bearings can be used. Especially with a larger number of threads, multi-row roller bearings are preferably used.

The guide roller according to the invention is explained in more detail below with reference to some embodiments with reference to the accompanying figures.

They show:

1 schematically a cross-sectional view of a first embodiment of the guide roller according to the invention

2 schematically a combined cross-sectional and side view of another embodiment of the guide roller according to the invention

3 schematically a cross section of another embodiment of the guide roller according to the invention

In 1 is a cross-sectional view of a first embodiment of the guide roller according to the invention shown schematically. The guide roller has a rolling bearing 1 on top of an inner retaining ring 3 , several rolling elements 4 and an outer guide ring 2 is formed. Thus, the guide ring 2 and the retaining ring 3 relative to each other by the rolling elements 4 rotatable. The guide ring 2 facing the inner retaining ring 3 a greater thickness. At the outer circumference of the guide ring 2 is a circumferential Fadenführungsnut 6 educated. The thread guide groove 6 is executed in this embodiment with a circular groove bottom. In principle, however, other common groove shapes such as a U-shape or a V-shape are possible. The groove bottom of Fadenführungsnut 6 form the thread contact surface 13 , on the surface of a thread is feasible. The thread contact surface 13 is designed wear-resistant. In this embodiment, the guide ring 2 made of a ceramic material, so that the full ceramic of the guide ring 2 the required wear protection of the thread contact surface 13 represents.

Next to the guide ring 2 are also the rolling elements 4 as well as the retaining ring 3 formed in this embodiment in each case by a ceramic material. This makes it possible to form very powerful rolling bearings.

For holding the retaining ring 3 a passport opening 8th on, which can be pushed directly onto an axle carrier (not shown here). The retaining ring 3 can be connected to the axle beam in a force-locking or positive-locking manner.

The rolling elements 4 be on the circumference of the retaining ring 3 over a bearing cage 5 kept at a predetermined distance from each other.

At both ends of the retaining ring 3 and the guide ring 2 are several sealing plates 7.1 and 7.2 arranged. The sealing plates 7.1 and 7.2 essentially extend between the inner retaining ring 3 and the outer guide ring 2 so as to encapsulate the rolling elements 4 to build. This prevents undesired penetration of foreign bodies such as fluff or other volatile constituents of the threads.

This in 1 illustrated embodiment is thus particularly suitable to take thread guides in a textile machine or a melt spinning process. Here, the thread can be without slippage even at relatively low tensile forces on the thread contact surfaces 13 the thread guide groove 6 to lead.

In 2 a further embodiment of the guide roller according to the invention is shown schematically in a combination of a cross-sectional view and a side view. In 2 the guide roller in the lower half of the picture is shown in a cross-sectional view and in the upper half of the picture in a side view.

This in 2 illustrated embodiment is essentially identical to the embodiment according to 1 , so that only the differences are explained below and otherwise referred to the above description.

At the in 2 illustrated embodiment is the rolling bearing 1 over the retaining ring 3 on the axle carrier 9 held. The axle carrier 9 penetrates the passport opening 8th of the retaining ring 3 and carries on a projecting end of a cup-shaped housing 10 , The housing 10 is formed such that the outer guide ring 2 as well as the housing 10 facing end face of the rolling bearing 1 completely shielded from the environment. In the area of the thread guide groove 6 shows the case 10 a thread opening 11 on. The thread opening 11 extends in the radial direction parallel to the Fadenführungsnut 6 , Wherein, depending on the thread guide wish the thread opening 11 extends over an angular range of 60-200 °. This in 2 illustrated embodiment thus represents a high level of security to the environment. The rotating guide ring 2 the guide roller is from the stationary housing 10 safely covered.

In 3 a further embodiment of the guide roller according to the invention is shown schematically in a cross-sectional view. In this embodiment, the guide ring carries 2 on the circumference two circumferential Fadenführungsnuten 6.1 and 6.2 , The thread guide grooves 6.1 and 6.2 are in a mission 12 formed, the non-positively or positively with the guide ring 2 connected is. The use 12 is preferably formed of a ceramic material, so that the respective thread contact surfaces 13 the thread guide grooves 6.1 and 6.2 have a high wear resistance.

The rolling bearing 1 is formed in two rows in this embodiment. These are between the guide ring 2 and the retaining ring 3 two rows of several rolling elements 4 arranged side by side. In that regard, the in 3 illustrated embodiment also on commercial rolling bearings whose guide ring 2 for receiving the Fadenführungsnuten 6.1 and 6.2 is specially designed. The rolling elements 4 are over a bearing cage 5 held and are above the sealing plates 7.1 and 7.2 in the space between the guide ring 2 and the retaining ring 3 capsuled.

At the in 1 to 3 illustrated embodiment of the guide rollers according to the invention, the wear-resistant thread contact surfaces in the yarn guide groove can also be advantageously produced by a coating. In that regard, metallic materials for the formation of the guide ring 2 and the retaining ring 3 possible.

LIST OF REFERENCE NUMBERS

1

roller bearing

2

guide ring

3

retaining ring

4

rolling elements

5

bearing cage

6, 6.1, 6.2

yarn guide groove

7.1, 7.2

sealing plate

8th

pass opening

9

axle

10

casing

11

thread hole

12

commitment

13

Thread contact surface

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 4225690 A1 [0002]
• DE1979730 [0005]

Claims (10)

Guide roller for guiding a thread within a textile machine or a melt spinning process with at least one rolling bearing ( 1 ) consisting of an outer guide ring ( 2 ), an inner retaining ring ( 3 ) and several between the two rings ( 2 . 3 ) arranged rolling elements ( 4 ), characterized in that on the outer circumference of the guide ring ( 2 ) a circumferential thread guide groove ( 6 ) is trained. Guide roller according to claim 1, characterized in that the guide ring ( 2 ) in the region of the thread guide groove ( 6 ) a wear-resistant thread contact surface ( 13 ) having. Guide roller according to claim 2, characterized in that the thread contact surface of the yarn guide groove is formed by a ceramic insert on the circumference of the guide ring or by a ceramic material of the guide ring. Guide roller according to claim 2, characterized in that the thread contact surface ( 13 ) of the thread guide groove ( 6 ) by a surface coating on the circumference of the guide ring ( 2 ) is formed. Guide roller according to one of claims 1 to 4, characterized in that the retaining ring ( 3 ) an inner fitting opening ( 8th ) for receiving an axle carrier ( 9 ) having. Guide roller according to one of claims 1 to 5, characterized in that at both end faces of the rolling bearing ( 1 ) each have a sealing plate ( 7.1 . 7.2 ) between the guide ring ( 2 ) and the retaining ring ( 3 ), which annular sealing plates ( 7.1 . 7.2 ) an encapsulation of the rolling elements ( 4 ) form. Guide roller according to one of claims 1 to 6, characterized in that on the end faces of the rolling bearing ( 1 ) a cup-shaped housing ( 10 ) is arranged, which the guide ring ( 2 ) and which in the region of the thread guide groove ( 6 ) a thread opening ( 11 ) having. Guide roller according to claim 7, characterized in that the thread opening ( 11 ) over an angular range of at least 100 ° above the Fadenführungsnut ( 6 ). Guide roller according to one of the preceding claims, characterized in that the guide ring ( 2 ), the retaining ring ( 3 ) and the rolling elements ( 4 ) are each formed of a ceramic material. Guide roller according to one of claims 1 to 9, characterized in that on the circumference of the guide ring ( 2 ) a plurality of mutually parallel yarn guide grooves ( 6.1 . 6.2 ) are formed.

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