EP1191133B1 - Method and Device for renovating open-end spinning machine - Google Patents

Description

The present application relates to a reprocessing method of open-end spinning devices. Open-end rotor spinning devices from Open-end rotor spinning machines, e.g. currently from the manufacturer W. Schlafhorst AG & Co. and Rieter Ingolstadt Spinnereimaschinenbau AG essentially consist of a large number of spinning units and a variety of devices for winding the spun Thread. Such a spinning unit has a spinning rotor as the spinning organ, which is rotated by a drive means. Of great importance is how the spinning rotor is stored.

The bearing of the rotor shaft is divided into radial and one axial bearing. With the radial bearing the spinning rotor is in one Wedge gap added by support disks. The axial bearing and thereby caused support during the operation of the spinning rotor this axial thrust is carried out on a thrust bearing. Until a few years ago Years ago the axial bearing on the machines of the two above mentioned manufacturers, and thus with a substantial part of such Spinning machines, made with a ball on which the rotor shaft supported. The rotor shaft rotates the ball. The necessary lubrication of the ball takes place with the help of a Lubricant.

However, such axial bearings of the rotor shaft have the disadvantage that that in order to enable the important rotation of the ball, special requirements to be placed on the lubrication. In the majority of cases therefore lubricate these balls with an oil bath or an oil-containing medium. In addition to the not always guaranteed rotation of the ball and thus the This type of axial rotor bearing carries the risk of high wear the further disadvantage that the lubricant by the vibrations and high speeds of the rotor shaft exits the axial bearing and Spinning machine or the spinning device dirty. By oiling up the storage area causes fine dust and fibers of the Deposit and fix the spinning process on the machine. This can lead to the known disadvantages in thread formation. Dissolving Dirt can get into the fiber material to be spun get there and lead to impurities and irregularities.

In addition, these bearings have the disadvantage that they require a lot of maintenance must be operated. This is definitely in regular Intervals cleaning the spinning machine and also a check the lubrication condition of the thrust bearing, on this occasion Often, lubricant is topped up, which takes up more time elevated.

The disadvantages of spinning machines with such open-end spinning rotors to eliminate, the prior art has a different kind axial rotor bearing developed, in which the axial bearing of the spinning rotor done without a bullet and also on lubricant, which is the fibers contaminated, can do without. This bearing is from EP 0 435 016 A2 known.

After the introduction of such pneumatically operated axial bearings, which not only avoid the disadvantages described above, but where the Structure of the storage is so simple that in addition an exchange this storage can be carried out particularly easily, are in State of the art attempts have become known to these modern bearings to be replaced by simplified ball thrust bearings. It becomes theirs Installation of the improved structure of the pneumatic axial bearing used and the ball thrust bearing simply in the inclusion of this modern Axial bearings used. A reduced version of the known, Axial ball bearings lubricated with oily lubricants the holder for the modern pneumatic axial bearings inserted. This way of deconstruction to storage with a conventional one System were the advantages achieved by modern axial bearings eliminated to replace them with devices that are traditional Axial bearings were simulated. This type of storage has but also due to the design, lubrication using an oil-containing medium. Instead of adapting outdated bearings to the latest technology, on the contrary, the prior art has, surprisingly modern axial bearings dismantled.

The object of the present invention is by a suitable method to enable the many thousands of spinning devices still in operation, with lubrication of the rotor using oil-containing media, can be worked up without great effort so that they meet the requirements, which are now placed on open-end spinning devices, can fulfill without the complete spinning device or machine must be replaced. The investment in modernization is kept small and remains limited to the crucial components.

The present object is achieved according to the invention of claim 1 solved.

Due to the advantageous refurbishment of an open-end spinning device according to the method of claim 1 is advantageously achieved that also open-end spinning machines with a ball thrust bearing already on the market easily inexpensive and quick, instead of being replaced, be refurbished and returned to the production process can be. Refurbishing requires only a small amount Time and low financial expense compared to replacing the Open-end rotor spinning devices or the complete open-end rotor spinning machine through new spinning devices or a new modern one Open-end spinning machine.

Refurbished open-end rotor spinning machines have essentially same advantages in terms of storage properties Open-end spinning rotors like the open-end rotor spinning machines with the known one pneumatic axial bearing already included in new condition for the spinning rotor. The bearing block is all that is needed for reprocessing the open-end rotor spinning device to be refurbished be, which then easily located on the pedestal Thrust bearing can be separated and according to the invention by a Thrust bearing bracket can be replaced with a pneumatic thrust bearing. This can advantageously be accelerated in that, for example section by section the corresponding parts of the rotor bearings the open-end spinning machine to be reprocessed expanded and refurbished while the remaining sections of the spinning machine remain in operation. Another advantageous method involves working up already Bearings kept ready after the expansion of the original Bearings to be installed immediately, so that only a very short interruption of production arises. The original that was removed Bearings can then be refurbished at any point to be subsequently also step by step to replace the original bearings.

This takes place in an advantageous development of the method according to the invention Separating the axial bearing from the bearing block by machining, for example by sawing or milling or advantageously by non-cutting Cutting, for example using a laser or an electron beam. This ensures that an interface is cheap and fast arises, which can be processed immediately. This is advantageously done in a further process step. This creates, for example flat surface with a low roughness, which is advantageous as a counter surface acts for a mating surface, thereby adjusting the thrust bearing bracket on the bearing block is improved.

The ball thrust bearing is advantageously separated such that the plane in which the separation takes place parallel to the plane in which the support disks lie, i.e. by the pair of support disks near the rotor or the pair of support disks is formed at the shaft end. The separation can be advantageous between the two levels of the two pairs of support disks mentioned above lie. An advantageously designed dividing line can thereby be achieved be that this breaks in its course and also perpendicular to the levels of the support disks described above.

The thrust bearing bracket is advantageously designed with a corresponding mating surface, so that the separating surface is advantageous for adjusting the bearing bracket is suitable on the bearing block, especially if it is processed accordingly is. In a further advantageous development of the method, the Partition surface with a fastener for fastening the bearing bracket fitted. This advantageously ensures that the fastening of the bearing bracket can be done easily and quickly and precisely. In The fastener is a particularly favorable design as a bore formed, which are also particularly advantageously provided with a thread can be. This fixes the bearing bracket to the bearing block particularly easy and safe possible, e.g. by means of screws.

The storage is advantageously achieved that an inexpensive storage is formed, the bearing block of which benefits the original storage for example the radial mounting of the spinning rotor by means of support disks retains and at the same time the advantages of a pneumatic axial bearing of the Spinning rotor united. For this purpose, the thrust bearing bracket is also advantageous a receptacle for a bearing surface of a pneumatic axial bearing. By forming a fitting surface for the allocation of the storage area to the spinning rotor is achieved that no further measures for Adjusting the bearing surface of the thrust bearing to the spinning rotor are required in any case, no change in the angular position of the bearing surface in the Cause relationship to the axis of the rotor shaft.

In the storage, the separating surface and the mating surface are at the same time designed to ensure in connection with the thrust bearing carrier, that no adjustments are required that the bearing surface in the axial direction of the spinning rotor. This is particularly cheap because of it Time to set can be saved, and moreover for that No special knowledge is required for maintenance personnel. The The separating surface has been machined and forms a centering and positioning surface the bearing plate of the thrust bearing to the rotor shaft, which with the bearing should be stored. The separating surface optionally has centering means for the Centering or alignment of the bearing bracket on the bearing block, e.g. dowels or mounting holes for this. As a result, when installing the Axial bearing bracket with the help of the arranged centering a quick and secure centering of the bearing bracket on the bearing block. This facilitates and accelerates the assembly of the Storage and thus the reprocessing of the open-end rotor spinning device.

The invention is illustrated below with the aid of drawings described.

Figur 1

eine Lagerung einer Offenend-Rotorspinnvorrichtung mit einem Kugelaxiallager vor der Wiederaufarbeitung;

Figur 2

die wiederaufgearbeitete Lagerung nach Fig. 1, nach der Montage des Axiallagerträgers für ein aerostatisches Axiallager;

Figur 3

das Kugelaxiallager von Figur 1 im Schnitt;

Figur 4

den Axiallagerträger von Figur 2 in perspektivischer Darstellung.

Show it:

Figure 1

a storage of an open-end rotor spinning device with a ball thrust bearing before reprocessing;

Figure 2

the refurbished bearing of Figure 1, after the assembly of the thrust bearing carrier for an aerostatic thrust bearing.

Figure 3

the ball thrust bearing of Figure 1 in section;

Figure 4

the axial bearing bracket of Figure 2 in perspective.

Figure 1 in connection with Figure 3 shows a bearing of an open-end rotor spinning device according to the prior art with a ball thrust bearing 13 before reprocessing. The storage 10 consists of a Bearing bracket 11 on which the support disks 12 and the ball thrust bearing 13 are arranged. Such storage is for example from DE 41 21 387 A1, compare FIG. 2. When storing Figure 1 the support disks 12 are arranged in pairs so that they have two wedge gaps Form 121, in which the rotor shaft is mounted. At his the ball thrust bearing 13 opposite end of the rotor shaft 14 carries the open-end spinning rotor 140. About a drive means, not shown, which in the state of the Technology is usually designed as a tangential belt, the spinning rotor 140 driven via the rotor shaft 14 and set in rotation. Two each Support disks 12 are connected to one another via an axis 15 and via the axis 15 is mounted in support disc bearings 16. The support disc bearings 16. are recorded in semicircular images 17. About a bracket 18 are the support disc bearings 16 in the receptacles 17 of the bearing block 11 pushed in and held. The bracket 18 is on the bearing block 11 held. The axes 15 of the support disks 12 are skewed to one another arranged so that the one supported in the wedge gaps 121 over the support disks Rotor shaft experiences an axial thrust, which it against as a ball thrust bearing 13 trained axial bearing 10 presses.

The ball thrust bearing 13 has a chamber 19, which has a cover 20 is closed. Inside the chamber 19 there is a ball 5 in height of the rotor shaft 14 against which it rests. The ball 5 in turn supports on the side facing away from the rotor shaft 14 at a depth stop 21, which picks up the ball in the manner of a spherical cap. The depth stop 21 can be adjusted with a fixing screw 22, which means the mother 220 is countered.

The ball thrust bearing 13 has a cover 20 for lubricating the ball 5 opposite receptacle 3 for lubricant 31, to support serves to rotate the ball. The lubricant 31 is passed over a wick 32 brought up to the ball K.

The bearing block 11 is via fastening screws 23 on the frame 24, here only shown schematically, attached to the spinning machine. For refurbishing the open-end spinning device, the bearing block 11 must first from the spinning machine and thus also from the spinning device by loosening the fastening screws 23 are removed or removed. Is to it cheap to shut down the drive means, not shown, so that the bearing block 11 with the support disks 12 and the ball thrust bearing 13 from the Spinning machine can be expanded. Before that, the Spinning rotor 140 with its rotor shaft 14 removed from the bearing 10. After the storage 10 has been removed, for the sake of simplicity Support disks 12 removed from the bracket 11 after the clamp 18 has been released, so that the further steps on the bracket 11 performed more easily can be.

Next, to reprocess the open-end spinning device, to remove the ball thrust bearing 13 from the bearing block 11. this happens by separating the ball thrust bearing 13, for example by sawing, along one of the dividing lines A to E shown by way of example, where the left and right sides of the bracket 11 are the same or different Can have cutting lines (A, B, C, D, E). By detaching the ball thrust bearing 13 is formed along the cutting lines (A to E) Partition surface 3 to which the axial bearing carrier 4 with a receptacle for Bearing surface of a pneumatic axial bearing (see Figure 2) adds.

The bearing 10 from FIG. 2 is a refurbished bearing 10 according to FIG the invention. The bearing 10 consists of a bearing block 11 Bearing 10 with a ball thrust bearing 13, as shown in Figures 1 and 3 is. By separating the ball thrust bearing 13 (see FIG. 1) is the Partition surface 25 free, so that according to the invention an axial bearing carrier 4 arranged for a bearing surface 41 of a pneumatic axial bearing 42 can be. The separating surface 25 is in the exemplary embodiment in FIG. 2 after cutting off the ball thrust bearing, so that the Partition surface 3 forms a flat smooth surface on which the thrust bearing bracket 4 seamlessly creates with its mating surface 45. Machining the interface 25 is in the embodiment of Figure 2 by machining, i.e. here by milling. The interface receives through machining an assignment to the storage of the support discs and indirectly thereby also to the rotor shaft mounted on the support disks. The interface thereby becomes a stop surface (counter surface) for the mating surface 45 the axial bearing bracket 4.

The separating surface 25, in the embodiment of Figure 2 in two each Sub-surfaces arranged to the left and right of the wedge gap of the bearing block 11 is formed, has two fastening means 440, which in FIG Dashed lines are shown. The fastener 44 is made each from a hole through which a screw shaft extends extends into the thrust bearing bracket 4. The thrust bearing bracket 4 lies with his Mating surface 45 on the parting surface 3 of the bearing block 11. Meeting area 25 and mating surface 45 are designed so that the Bearing surface 41 of the pneumatic axial bearing 42 after assembly of the Axial bearing bracket 4 in relation to the other bearing elements, and in particular the free end of the rotor shaft 14 is in the correct position. When mounting the thrust bearing bracket 4 is in the receptacle 46 for that Thrust bearing 42 introduced a mounting void, which specifies the position in which the mating surface 45 together with the separating surface 43 through the fastening means 44 must be attached to each other. For axial adjustment, that is, in relation to the end of the red shaft of the pneumatic Axial bearing 42, the receptacle 46 is designed in the form of a clamping fist, so that the pneumatic thrust bearing 42 in the correct axial position can be attached to the thrust bearing bracket 4 with the clamping screw 47. The thrust bearing bracket itself has two fastening centers 44 it is particularly advantageously possible to do this even with a bearing block use, in which the fasteners are designed differently.

Figure 3 shows the ball thrust bearing of Figure 1 in section. The rotor shaft 14 lies in operation on the ball 5, which forms a depth stop 21 for it, on. The ball 5 is in turn supported on the fixing screw 22, which means the nut 220 is countered and thus fixed in rotation. To lubricate the Ball is arranged below this, a receptacle 3 for lubricant 31. The lubricant 31 is oil, which by means of a wick 32, the ball 5 touched, on the surface of which is applied. The chamber 19 of the ball thrust bearing 13, which is located above the receptacle 3, is pushed upwards completed the lid 20. By opening chamber 19 the rotor shaft protrudes into it, being surrounded by an enclosure 33 to prevent lubricant from escaping.

As an alternative to the type of separation shown in FIGS. 1 and 2 of the ball thrust bearing, this is also possible in that from the ball thrust bearing 13 first the ball 5 is removed and then in the area the chamber 19 an axial bearing carrier with a receptacle for the pneumatic Thrust bearing is arranged. For this purpose, the enclosure 33 must be separated as well as the ball holder 51, which increases the mobility of the ball 5 restricted in the ball thrust bearing, be removed. At the by severing The separating surface 300 that arises from the enclosure 33 is then located correspondingly Mating surface 45 of a correspondingly designed thrust bearing bracket 4 (not shown).

In a further design option for the separation of the ball thrust bearing the interior of the chamber 19 is milled cylindrical and on the thereby an annular separating surface 300, for example an annular thrust bearing carrier 4 (not shown) used the bearing surface of a pneumatic Axial bearing accommodates. The parting surfaces of the different embodiments the separation of the ball thrust bearing are to be fulfilled to design their function as explained in Figures 1 and 2.

FIG. 4 shows the axial bearing carrier as used in the storage of FIG. 2 is. The thrust bearing bracket has left and right of the thrust bearing 42 a mating surface 45 with which it is reworked on the parting surface Storage is positioned. Order with different bearing blocks, For example, be used by various spinning machine models to be able to, the thrust bearing 4 of Figure 4 each has two fasteners 44. The one shown above is a blind hole formed, which is provided with a thread, the lower as Through hole through which then for attachment a Screw is screwed into the matching machined bearing block can. Other types of mounting are also possible as long as they are one ensure secure attachment. In addition to using the hole as a fastener, this can also be used for the exact positioning of the Axial bearing bracket can be used. For example, a dowel pin be arranged in the bore, the one machined accordingly Interface of a reconditioned bearing block cooperates.

For fastening the pneumatic thrust bearing 42 to the thrust bearing bracket 4 this has a receptacle 46, which is designed in the form of a clamping fist is. The sleeve-shaped axial bearing is screwed 460 42 attached with its bearing plate 41 to the thrust bearing bracket. Because of the advantageous Design of the thrust bearing 42 and receptacle 46 can the bearing plate simply viewed in the axial direction with respect to the rotor shaft, be positioned. In operation, the thrust bearing is over that of the bearing plate 41 opposite side via a feed line (not shown) with compressed air provided. In addition to the described embodiments for separating and remodeling the storage is also possible.

Claims (12)

1. Method for reprocessing an open-end spinning device with a spinning motor mounted by protected discs (12) in the tapered gap (121) such that the protective discs (12) are mounted and held in a bearing bracket (11), which also bears a thrust bearing (13) that features a retaining fixture for a ball as well as a receptacle (3) for a lubricant, characterized such that the bearing bracket (11) is removed from the open-end spinning device, the thrust bearing (13) is separated from the bearing bracket (11), a thrust bearing carrier (4) for an aerostatic thrust bearing (42) featuring a bearing face (41) is subsequently arranged on the bearing bracket (11), that the thrust bearing carrier (4) is aligned and secured on the bearing bracket (11) and the thrust bearing (42) is adjusted with respect to the rotor shaft (14), which is taken up by the protective discs, at least partly by the mounting arrangement of the thrust bearing carrier (4) on the bearing bracket (11) such that the parting face (25) and the locating surface (45) on the thrust bearing carrier (4) determine the allocation of the bearing face (41) of the thrust bearing with respect to the spinning rotor, and the bearing bracket (11, 4) is subsequently installed in an open-end spinning device.
2. Method in accordance with Patent Claim 1, characterized such that separation at the bearing bracket (11) takes place at least partly in one plane that runs parallel to the plane, in which the protective discs (12) are mounted.
3. Method in accordance with Patent Claim 1 or 2, characterized such that separation takes place between the two planes formed by the two pairs of protective discs (12).
4. Method in accordance with one or several of the Patent Claims 1 to 3, characterized such that separation takes place at least partly vertical with respect to the plane in which the protective discs (12) are mounted.
5. Method in accordance with one or several of the Patent Claims 1 to 4, characterized such that separation takes place at least partly by drilling or milling mainly vertical or mainly parallel with respect to the plane of the protective discs (12).
6. Method in accordance with one or several of the Patent Claims 1 to 5, characterized such that separation of the thrust bearing from the bearing bracket (11, 4) takes place by metal-cutting machining or a non-metal removal cutting process.
7. Method accordance with one or several of the Patent Claims 1 to 6, characterized such that the parting face on the bearing bracket (11, 4) is machined.
8. Method in accordance with one or several of the Patent Claims 1 to 7, characterized such that the parting face forms an opposite surface for the purpose of adjusting the bearing carrier on the bearing bracket (11, 4).
9. Method in accordance with one or several of the Patent Claims 1 to 8, characterized such that the parting face is equipped with a fixture for mounting the bearing carrier.
10. Method in accordance with Patent Claim 9, characterized such that the fixture is designed as a hole.
11. Method in accordance with Patent Claims 10, characterized such that the hole has a thread.
12. Method in accordance with one or several of the Patent Claims 1 to 11, characterized such that the axial bearing carrier is mounted in a positive lock arrangement.

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