EP2408955B1 - Open-ended spinning device - Google Patents

Abstract

The invention relates to an open-ended spinning device having a rotor housing to which a vacuum can be applied, in which a spinning rotor spins at a high speed during spinning operation and that can be closed by a pivotally supported cover element comprising a receptacle for a replaceable channel plate adapter. According to the invention, the channel plate adapter (18) comprises a perimeter sealing surface (31) contacting the rotor housing (2) when the cover element (7) is closed and having mounting elements (30, 38) disposed on the back side thereof corresponding to associated mounting means (21, 41) in the area of the cover element (7) in the installed state of the channel plate adapter (18).

Description

The invention relates to an open-end spinning device according to the preamble of claim 1.

Such open-end spinning devices are widely used in the textile industry and are known in numerous embodiments, the various embodiments of which are in part described in detail in the patent literature.

The DE 43 34 485 A1 describes, for example, an open-end spinning device with a pivotally mounted cover element, which has an annular groove for inserting a lip seal element and an open in the direction of the rotor housing receptacle with conical contact surfaces for a channel plate adapter.

When the open-end spinning device is closed, the cover element rests against the rotor housing with the lip sealing element and seals it from the front.

In a recording of the cover element, by means of bolts, pass through the corresponding through holes in the cover element, the channel plate adapter interchangeable fixed.

For angular alignment of the channel plate adapter within the receptacle, a cylindrical pin is provided, which is embedded in a bore of the cover element and corresponds with a corresponding fitting bore on the back of the channel plate adapter.

A disadvantage of this known open-end spinning device is especially the somewhat complicated type of attachment of the channel plate adapter.

That is, in a batch change, in which, for example, all spinning rotors of an open-end rotor spinning machine and thus all channel plate adapter are replaced, always at each of the numerous workstations of the textile machine initially awkward, the two bolts are unscrewed, which is relatively time consuming.

Attempts have therefore already been made in the past to replace this somewhat cumbersome and time-consuming fastening method of a channel plate adapter by the use of a spring-loaded arresting means which fixes the channel plate adapter in the receptacle easily releasably.

Also in the DE 195 24 837 B4 described open-end spinning device has a pivotally mounted lid member for closing the rotor housing during the spinning operation, wherein the lid member in addition to the well-known lip seal member also has a receptacle for a channel plate adapter.

The channel plate adapter is locked in this recording by means of a bar spring so that the channel plate adapter can be removed if necessary by bending back the bar spring quickly and easily.

That is, the rod spring fixed to the cover element grasps for locking the channel plate adapter in a Tangentialnut, which is incorporated in the conical contact surface of the bearing body of the channel plate adapter.

In practice, however, has shown that such a method of attachment is only partially suitable to ensure an easily removable in case of need, but during the spinning operation but proper fit of the channel plate adapter. The eccentric application of force of the locking means may for example lead to tilting of the conical bearing body of the channel plate adapter in the receptacle of the lid member, with the result that problems with incoming false air occur at the respective open-end spinning device, which leads in particular to a strong contamination of the relevant cover element.

By the DE 196 17 527 A1 , the DE 197 29 192 A1 or the DE 198 36 073 A1 Furthermore, open-end spinning devices are known in which, when fixing the channel plate adapter in a corresponding receptacle of a cover element, it is avoided that the associated fastening element acts on one side.

The DE 196 17 527 A1 concerns, for example, an open-end spinning device in which the channel plate adapter is fixed in the installed state both positively and positively in a receptacle of the lid member.

As a non-positive fastening means a magnetic coupling is provided in this case, while the positive connection via a centrally arranged threaded connection.

In the DE 198 36 073 A1 a comparable open-end spinning device is described. However, the channel plate adapter is fixed purely magnetically in the associated receptacle of the cover element and, if necessary, can be pressed out of the receptacle by means of a special mechanical punch.

Although the two open-end spinning devices described above are relatively expensive to produce, even with these devices, the problem of incoming false air could not be satisfactorily solved.

Such open-end spinning devices have therefore found no input into practice.

A widely used in practice open-end spinning device is in the DE 197 29 192 A1 described.

Also in these known open-end spinning devices, the rotor housing vacuum-pressurized during the spinning operation is closed by a pivotally mounted cover element, which has a lip seal element arranged in an annular groove and an opening in the direction of the rotor housing for a channel plate adapter.

The associated channel plate adapter has on its back on a central extension, which is equipped with outwardly projecting abutments for a fastener.

In the installed state of the channel plate adapter, the rear projection penetrates a corresponding hole in the receptacle of the lid member and is acted upon by a fastener arranged on the cover element so that the conical bearing body of the channel plate adapter is uniformly or almost evenly pulled into the receptacle of the cover element, the bearing surfaces correspondingly conical are formed.

The in the DE 197 29 192 A1 Although open-end spinning devices described are relatively widespread, as indicated above, but also have the disadvantage that not always a sufficient seal between the channel plate adapter and the associated receptacle in the cover member can be ensured, with the result that through the hole for the rear extension of the channel plate adapter can enter false air.

That is, even with these known open-end spinning devices contamination in the area of the cover elements can not always be reliably avoided.

Finally, through the DE 10 2006 060 500 A1 Open-end spinning devices are known in which the lid element equipped with a lip sealing element is equipped with a central bearing opening for a channel plate adapter.

The bearing opening in the cover element is designed so that the channel plate adapter can be installed from the outside.

That is, the channel plate adapter can be inserted even with the spinning device in the bearing bore and fixed there by a special locking element.

This special locking element is limited pivotally mounted about a horizontal axis and corresponds to two laterally arranged on the channel plate adapter lugs.

As with the open-end spinning devices described above, the occurrence of false air currents can hardly be prevented in this known spinning device.

Based on the aforementioned prior art, the present invention seeks to develop a low-cost open-end spinning device in which a channel plate adapter is not only reliable and easily replaceable when needed in a recording of the lid member, but also ensures that it can not come to the emergence of false air currents and the associated contamination in the region of the cover element when the cover element is closed.

This object is achieved by a device as described in claim 1.

Advantageous embodiments of the invention are the subject of the dependent claims.

A channel plate adapter which has a circumferential sealing surface abutting the rotor housing when the cover element is closed and is equipped with attachment projections arranged on the rear side, which in the installed state of the channel plate adapter correspond with associated fastening means in the region of the receptacle of the cover element, not only has the advantage that the channel plate adapter due to evenly introduced pressure force can be exactly fixed in the receptacle of the cover element, but the circumferential sealing surface of the channel plate adapter also ensures that can reach from the rotor housing no negative pressure in the area behind the channel plate adapter. That is, by the voltage applied to the rotor housing, circumferential sealing surface the generation of harmful false air flows and thus the emergence of excessive contamination in the region of the cover element is reliably prevented.

In an advantageous embodiment described in claim 2, the fastening elements of the channel plate adapter are designed as lugs, which can be acted upon by a multipoint locking arranged on the cover element.

Such a multi-point lock allows a secure, positive fixing of the channel plate adapter in the receptacle of the lid member.

Such multi-point locking is particularly advantageous if it is designed as a three-point lock as described in claim 3.

The use of such a three-point locking not only ensures that the channel plate adapter when needed can be easily and quickly switched on and / or replaced, but also ensures that the bearing body of the channel plate adapter on its entire contact surface with a Almost uniform contact pressure rests against the bearing surfaces of the receptacle of the cover element.

As described in the subclaims 4-8, it is provided in an advantageous embodiment that the multi-point lock has a limited rotatably mounted on the lid member locking ring which is defined in a channel plate adapter insertion position or in a channel plate adapter locking position positioned.

The locking ring is formed as a cross-sectionally U-shaped component having a rear mounting flange in the installed state and a front mounted clamping flange.

By means of a fixable on the lid member fixing ring of the locking ring is so movably adjustable that the locking ring on the one hand safely positioned in a set working position on the other hand but also easily between a Kanalplattenadapter receiving position, which allows the insertion or removal of a channel plate adapter, and a channel plate adapter -Arretierungsstellung in which an inserted channel plate adapter is set correctly and safely in the recording of the cover element, can be adjusted.

For removing a channel plate adapter from the receptacle of the cover element, the locking ring of multipoint locking can be positioned by a locking knob arranged on the knob, for example, in the so-called Kanalplattenadapter receiving position in which the incorporated into the clamping flange recesses are positioned just above the projections of a channel plate adapter located in the recording ,

The channel plate adapter can be easily removed upwards in this working position of the locking ring. Just as easily a new channel plate adapter can be inserted into the receptacle of the cover element in this working position of the locking ring.

The channel plate adapter is inserted in such a case with its lugs through the recesses of the locking ring in the multi-point lock. Subsequently, by turning the locking ring into the channel plate adapter locking position, the channel plate adapter is reliably fixed in the receptacle of the cover element.

That is, the fixation of the channel plate adapter via the equipped with recesses clamping flange of Arretierungsringes that engages over the rear side lugs on the channel plate adapter in the channel plate adapter locking position of the multi-point locking.

Overall, the multi-point lock described is a problem-free and quickly detachable, during operation very secure locking device for a channel plate adapter.

However, as described in claims 9 and 10 further described, the channel plate adapter in the receptacle of the lid member can also be fixed non-positively.

In such a case, the fastening elements of the channel plate adapter are preferably designed as permanent magnet inserts, which are defined in bores of the bearing body of the channel plate adapter.

These permanent magnet inserts correspond in the installed state of the channel plate adapter with associated permanent magnet inserts, which are embedded in corresponding holes in the receptacle of the cover element.

In an advantageous embodiment, each channel plate adapter has at least two such permanent magnet inserts.

The set in the Kanalplattenadaptern and the cover elements permanent magnet inserts that are magnetically aligned so that each opposing poles face each other, ensure that the channel plate adapter is always fixed with a sufficiently high tensile force in the recording of the lid member.

As described in claim 11, it is also provided in an advantageous embodiment that the fastening elements of the channel plate adapter are covered as far as possible during the spinning operation through the front of the channel plate adapter or protected behind the limited by the sealing surface front of the channel plate adapter.

In this way it is reliably avoided that the fastening elements of the channel plate adapter can be contaminated during the spinning operation by fiber fly or the like.

According to claim 12, during the spinning operation on the rotor housing adjacent sealing surface of the channel plate adapter has a diameter which extends slightly beyond the contour of the cover element.

This means, if necessary, the channel plate adapter can be easily grasped at the protruding edge of the sealing surface and taken to release the fasteners and / or for removing the channel plate adapter from the receptacle of the lid member.

As set forth in claim 13, the facing in the installed state of the channel plate adapter to the spinning rotor front of the channel plate adapter preferably has a sealing surface, a transition surface and a tower-like attachment.

That is, the channel plate adapter has a pneumatically favorable front surface, which ensures that it can lead to either the occurrence of unwanted false air currents or the creation of harmful air turbulence within the rotor housing.

Further details of the invention are shown in an embodiment shown below with reference to the drawings.

Fig. 1

in Seitenansicht eine Offenend-Spinnvorrichtung, mit einem in einer Aufnahme eines Deckelelementes angeordneten Kanalplattenadapter, wobei der Kanalplattenadapter eine umlaufende Dichtfläche aufweist, mit der er während des Spinnbetriebes am Rotorgehäuse der Offenend-Spinnvorrichtung anliegt,

Fig. 2

eine erste Befestigungsart für einen in Fig.1 dargestellten Kanalplattenadapter,

Fig. 3

eine Draufsicht auf den Arretierungsring der in Fig.2 dargestellten Dreipunktverriegelung,

Fig. 4

eine Draufsicht auf den Fixierring der Dreipunktverriegelung,

Fig. 5

einen Kanalplattenadapter mit als Ansätzen ausgebildeten Befestigungselementen, in Rückansicht,

Fig. 6

eine Dreipunktverriegelung in der Kanalplattenadapter-Einlegestellung,

Fig. 7

eine Dreipunktverriegelung in der Kanalplattenadapter-Arretierungsstellung,

Fig. 8

die weitere Befestigungsart für einen in Fig.1 dargestellten Kanalplattenadapter,

Fig. 9

einen Kanalplattenadapter mit als Permanentmagneteinsätzen ausgebildeten Befestigungselementen, in Rückansicht.

Show it:

Fig. 1

in side view, an open-end spinning device, with a arranged in a receptacle of a cover element channel plate adapter, wherein the channel plate adapter has a circumferential sealing surface, with which it rests during the spinning operation on the rotor housing of the open-end spinning device,

Fig. 2

a first attachment for a in Fig.1 illustrated channel plate adapter,

Fig. 3

a plan view of the locking ring of Fig.2 illustrated three-point lock,

Fig. 4

a top view of the fixing ring of the three-point lock,

Fig. 5

a channel plate adapter with fasteners designed as lugs, in rear view,

Fig. 6

a three-point lock in the channel plate adapter insertion position,

Fig. 7

a three-point lock in the channel plate adapter lock position,

Fig. 8

the further attachment for a in Fig.1 illustrated channel plate adapter,

Fig. 9

a channel plate adapter with trained as a permanent magnet inserts fasteners, in rear view.

In the Fig. 1 Open-end spinning device 1 shown a rotor spinning machine has a rotor housing 2, in which rotates the rotor cup of a spinning rotor 3 at high speed during spinning operation.

In the illustrated embodiment, the spinning rotor 3, which is supported with its rotor shaft in a support disk bearing 4 and positioned in the axial direction by a rotor end side arranged thrust bearing 17, driven by a machine-tangential belt 5.

The rotor housing 2, which is open towards the front, is sealed during the spinning operation by a channel plate adapter 18, which is arranged in a special receptacle 33 in a cover element 7, which is pivotably mounted about a pivot axis 16. The rotor housing 2 is connected via a pneumatic line 6 to a (not shown) vacuum source which provides the necessary vacuum during the spinning process. The cover element 7 is also equipped with a sliver-opening device 8, which consists essentially of a rotatably mounted in an opening roller housing 14 opening roller 9 and a sliver pick-up cylinder 10 shown schematically.

The opening roller 9 is for example driven by a tangential belt 12, while the drive of the Faserbandeinzugzylinders 10 takes place either via a machine-length drive shaft or via an electric single drive 15.

The working opening of the opening roller housing 14 in which the opening roller 9 rotates is, as usual, pneumatically connected continuously to the rotor housing 2 via a fiber guide channel 11.

That is, the individual fibers combed out of the opening roller 9 from a (not shown) original fiber tape can be pneumatically fed to the so-called fiber slide surface of the spinning rotor 3 during the spinning operation via the fiber guide channel 11.

As already indicated above, the cover element 7 has a receptacle 33 for fixing a channel plate adapter 18.

The central axis 42 of this preferably designed as a cylindrical recess and the rotor housing 2 towards open receptacle 33 is closed lid element 7 at the level of the spinning rotor. 3

In the receptacle 33 is a channel plate adapter 18 can be used with its bearing body 34, which is easily replaceable when needed.

The channel plate adapter 18 is positioned with its preferably cylindrical bearing body 34 in the receptacle 33 angularly and by means of, for example, in the Figures 2 and 8th shown fasteners 30, 21 and 38, 41 securely fixed.

The fasteners 30, 21 and 38, 41, which operate either positive or non-positive, are described below with reference to the Figures 2 - 9 explained in more detail.

The channel plate adapter 18 itself has, as usual, a central through-hole 13 for a thread withdrawal nozzle 19, wherein in the yarn withdrawal direction to the yarn withdrawal 19 a thread withdrawal tube 20 is connected.

In addition, such a channel plate adapter 18 has the output-side channel section 37 of the fiber guide channel 11. The front side 32 of the channel plate adapter 18 according to the invention consists of a circumferential sealing surface 31 abutting the rotor housing 2 of the open-end spinning device 1 during spinning operation, a transition surface 35 and a tower-like attachment 36 positioned at least partially within the spinning rotor 3 during the spinning operation.

The diameter D of the sealing surface 31 is selected so that the channel plate adapter 18 projects beyond the outer contour of the cover element 7 by the dimension a.

This means that when changing a channel plate adapter 18, in particular when removing a channel plate adapter, it can be easily grasped at the edge projecting by the dimension a and taken from the receptacle 33 of the cover element 7.

In Fig.2 a first type of attachment for such a channel plate adapter 18 is shown, wherein the channel plate adapter 18 is fixed by means of positive engagement in the receptacle 33 of the cover element 7.

That is, the channel plate adapter 18 is fixed in the receptacle 33 of the lid member 7 by means of a multi-point lock, which is formed in the embodiment as a three-point latch 21.

In the Fig.2 illustrated three-point lock 21 consists essentially of a U-shaped locking ring 22 and a fixable on the lid member 7 fixing ring 23rd

The locking ring 22 has a rear mounted mounting flange 24 in the installed state and a front arranged, slightly narrower clamping flange 25 which is equipped with recesses 26.

As in particular from the Figures 2 and 3 further apparent, the locking ring 22 also has a manually operable knob 27th

The fixing ring 23, the, as out Figure 4 can be seen, holes 28 for bolts 29 or the like. Exceeded in the installed state partially the mounting flange 24 of the locking ring 22 and presses the locking ring 22 while against the cover member 7 that the locking ring 22 remains securely positioned in its respective adjusted working position.

However, the locking ring 22 can be adjusted manually at any time by means of the knob 27, if necessary.

That is, the locking ring 22 can be used either in the in Fig. 6 illustrated channel plate adapter receiving position I or in the in Figure 7 shown channel plate adapter locking position II are pivoted.

How out Figure 5 can be seen, showing a channel plate adapter 18 in rear view, the channel plate adapter 18 is equipped with rear fasteners in the form of lugs 30, which correspond in the assembled state with the clamping flange 25 of the locking ring 22.

This means that when the locking ring 22 of the three-point lock 21 in the in Figure 6 shown channel plate adapter receiving position I is the recesses 26 of the clamping ring 25 are positioned so that a channel plate adapter 18 with its lugs 30 can be easily inserted into the three-point latch 21.

During the subsequent pivoting of the locking ring 22 of the three-point lock 21 in the in Figure 7 illustrated channel plate adapter locking position II covers the clamping flange 25, the lugs 30 of the channel plate adapter 18 sets thereby securely fixing the channel plate adapter 18 in the receptacle 33 of the cover element 7.

As usual, each channel plate adapter 18 also has a centering device 50, which ensures that the channel plate adapter 18 in the installed state is always aligned with an angle in the receptacle 33.

Such a known centering device 50 is in Fig.2 shown.

The centering device 50 shown as an exemplary embodiment consists for example of a cylinder pin 46 arranged on the channel plate adapter 18 and a fitting bore 47 incorporated in the receptacle 33 of the cover element 7.

The cylinder pin 46 is in a blind hole 45, which is arranged on the back in the bearing body 34 of the channel plate adapter 18, fixed.

In the proper installed state of the channel plate adapter 18, the cylinder pin 46 grips into the fitting bore 47, which ensures an angle-accurate, proper alignment of the channel plate adapter 18 in the receptacle 33.

The FIGS. 8 and 9 show a further, alternative fastening for fixing a channel plate adapter 18 in a receptacle 33 of a cover element. 7

However, the channel plate adapter 18 is not fixed in a form-fitting manner by a multi-point lock, but is positively locked by a magnetic coupling device. That is, in the bearing body 34 of the channel plate adapter 18 holes 40 are incorporated on the back, in which permanent magnet inserts 38, which have a predetermined magnetic pole orientation, can be fixed.

The permanent magnet inserts 38 correspond in the installed state of the channel plate adapter 18 with permanent magnet inserts 41 in the holes 39 in the receptacle 33 of the cover element. 7 are fixed and aligned with respect to their magnetic polarity in opposite directions to the permanent magnet inserts 38.

That is, the permanent magnet inserts 38, 41 have a magnetic orientation that ensures that between the permanent magnet inserts 38, 41 a high magnetic tensile force is given.

Although in Figure 8 not shown for reasons of clarity, also have the non-positively fixable in a receptacle 33 channel plate adapter 18 to a centering device 50, which ensures that the channel plate adapter 18 is positioned angularly aligned in its mounting position in the receptacle 33.

That is, even in these equipped with permanent magnet inserts 38 Kanalplattenadaptern 18, for example, in a blind hole 45, which is inserted from behind into the bearing body 34 of the channel plate adapter 18, a cylindrical pin 46 is fixed, which in the installed state with a corresponding fitting bore 47 in the receptacle 33 of Cover element 7 corresponds.

As explained above in connection with the channel plate adapters, which can be fixed by a multi-point interlocking positively in a receptacle of the cover element, also have the channel plate adapter, which are fixed non-positively in the receptacle 33 of the lid member 7, via a rotating, during the spinning operation on the rotor housing 2 fitting sealing surface 31st

In other words, these channel plate adapters 18 also have a front side 32 facing the spinning rotor 3, with a sealing surface 31, a transition surface 35 and a tower-like attachment 36.

The sealing surface 31 of the channel plate adapter 18 here also has a diameter D which extends beyond the outer contour of the cover element 7 by the dimension a.

This means that both in channel plate adapters 18 with positive fastening elements 30, 21 and channel plate adapters 18 with non-positive fasteners 38, 41, the fasteners are covered during spinning by the front 32 of the channel plate adapter 18 and the channel plate adapter due to the protruding edge in case of need well tangible.

Claims (13)

1. Open-end spinning device with a negative pressure-loadable rotor housing, in which a spinning rotor revolves at high speed during spinning operation and which can be closed by a pivotably mounted cover element, which has a receiver for a replaceable channel plate adapter, characterised in that the channel plate adapter (18) has a peripheral sealing face (31) resting on the rotor housing (2) when the cover element (7) is closed and is equipped with fastening elements (30, 38) arranged at the rear, which correspond with associated fastening means (21, 41) in the region of the cover element (7) in the installed state of the channel plate adapter (18).
2. Open-end spinning device according to claim 1, characterised in that the fastening elements are configured as attachment pieces (30), which can be loaded by a multi-point lock (21) arranged on the cover element (7) and allow proper fixing of the channel plate adapter (18) in the receiver (33) of the cover element (7).
3. Open-end spinning device according to claim 2, characterised in that the multi-point lock is configured as a three-point lock (21).
4. Open-end spinning device according to claim 2, characterised in that the multi-point lock (21) has a pivotably mounted locking ring (22), which can be positioned in a defined manner in a channel plate adapter insertion position (I) or in a channel plate adapter locking position (II).
5. Open-end spinning device according to claim 4, characterised in that the locking ring (22) is configured as a component which is u-shaped in cross section and has a fastening flange (24) and a clamping flange (25).
6. Open-end spinning device according to claim 5, characterised in that the clamping flange (25) of the locking ring (22) is equipped with recesses (26), by means of which the channel plate adapter (18) can be inserted by its attachment pieces into the multi-point lock.
7. Open-end spinning device according to claim 5, characterised in that the locking ring (22) is moveably adjustable by a fixing ring (23), which can be fixed on the cover element (7), in such a way that the locking ring (22) can be adjusted in a defined manner between the channel plate adapter insertion position (I) and the channel plate adapter locking position (II).
8. Open-end spinning device according to claim 4, characterised in that the locking ring (22) has an adjusting knob (27) for manual actuation of the multi-point lock (21).
9. Open-end spinning device according to claim 1, characterised in that the fastening elements are configured as permanent magnet inserts (38), which are fixed in bores (40) of the bearing body (34) of the channel plate adapter (18) and which correspond, in the installed state of the channel plate adapter (18), with permanent magnet inserts (41), which are arranged in bores (39) in the receiver (33) of the cover element (7).
10. Open-end spinning device according to claim 9, characterised in that the channel plate adapter (18) has at least two permanent magnet inserts (38).
11. Open-end spinning device according to claim 1, characterised in that the fastening elements (30, 38) of the channel plate adapter (18) are covered by the front side (32) of the channel plate adapter (18) during spinning operation.
12. Open-end spinning device according to claim 1, characterised in that the sealing face (31) of the channel plate adapter (18) resting on the rotor housing (2) during spinning operation has a diameter (D), which extends beyond the outer contour of the cover element (7) by the amount (a).
13. Open-end spinning device according to claim 1, characterised in that the front side (32) of the channel plate adapter (18) pointing to the spinning rotor (3) in the installed state of the channel plate adapter (18) consists of the sealing face (31), a transition face (35) and a tower-like attachment (36).

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