EP3044355B1 - Suction drum having a seal - Google Patents

Suction drum having a seal Download PDF

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Publication number
EP3044355B1
EP3044355B1 EP14777148.9A EP14777148A EP3044355B1 EP 3044355 B1 EP3044355 B1 EP 3044355B1 EP 14777148 A EP14777148 A EP 14777148A EP 3044355 B1 EP3044355 B1 EP 3044355B1
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EP
European Patent Office
Prior art keywords
suction drum
face
suction
drive element
projection
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Active
Application number
EP14777148.9A
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German (de)
French (fr)
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EP3044355A1 (en
Inventor
Ludek Malina
Robert Nägeli
Gabriel Schneider
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP3044355A1 publication Critical patent/EP3044355A1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/72—Fibre-condensing guides

Definitions

  • the invention relates to a rotatably mounted suction drum of a device for compacting a fiber material on a spinning machine with an annular drive element, which in operating position with a portion of its inner surface on a portion of a circular peripheral surface of a coaxially to a rotational axis of the suction drum and on an end face the suction drum attached approach rests.
  • a device for compacting a fiber material is described on a spinning machine, which is intended for retrofitting to a conventional drafting device of a spinning machine.
  • the device is arranged downstream of the drafting unit of the spinning machine and serves to compact (compact) a fiber material discharged from the drafting unit.
  • the compacted fiber material after passing through a nip, is fed to a swirl-generating device.
  • the swirl-generating device consists of z. Example, in a ring spinning machine from a rotor which rotates on a ring, wherein the yarn produced is wound on a rotating sleeve.
  • the in the WO 2012068692 A1 described compression device has for use on the usual twin drafting of ring spinning machines on two acted upon with suction, driven and rotating suction drums, which are axially parallel and at a distance to each other rotatably mounted on a support.
  • the carrier has a suction channel connected to a vacuum source, which is connected to the interior of the suction drums via corresponding inserts.
  • the inserts are provided with correspondingly shaped suction slots, whereby a corresponding air flow is generated at the periphery of the respective suction drum in a compression region.
  • CH705843 refers to a suction device for two adjacent to each other drafting units of a spinning machine with a manifold and two, starting from the manifold, extending in the opposite direction suction tubes whose outwardly directed openings directed against the output from the respective drafting unit yarn, wherein their the opposite ends of the openings open, each with an inner opening in the common manifold.
  • the outwardly directed openings of the suction show in the opposite direction and the opening into the manifold openings of the suction tubes face each other coaxially.
  • the suction drums are each assigned an annular drive element in the form of a friction wheel, which rests under the action of a compressive load with its circular inner surface partially on the circular peripheral surface of a arranged on the end face of the respective suction drum approach.
  • the rotational movement of the driven over the outer circumference friction wheel is transmitted via friction on the peripheral surface of the neck, which is connected to the suction drum.
  • the friction wheel is driven by a frictional engagement of the driven lower output roller of the drafting system.
  • the friction wheel is held in the axial direction on the approach in its position, wherein in the operating position between the end face of the suction drum and the friction wheel, an axial gap exists.
  • individual fibers can be released from the fiber material to be compacted and deposited on the circumference of the suction drum. These fibers can move in the direction of the end face of the suction drum and thereby pass into the axial gap between the end face of the suction drum and the friction wheel.
  • the movement of the fibers can be generated, for example, by the rotation of the suction drum or the air flow generated during the rotation of the suction drum. In this case, there is a risk that fibers that reach the axial gap, move to the outer periphery of the approach and attach to this.
  • the invention is therefore the object of the suction drum of a device for compressing a fiber material on a spinning machine in conjunction with the drive element form such that fibers that come off during the compression process of the fiber material to be compacted, not in the region of the outer periphery of the front of Suction drum arranged approach deposit.
  • the suction drum according to the invention can be used on a compacting device, which is permanently installed following the respective drafting system, or which is provided for retrofitting to a conventional drafting device.
  • a labyrinth-type seal is to be understood as meaning a preferably non-contact seal which is achieved by the intermeshing of molded elements.
  • the elevation and the recess cooperate in such a way that the opposing sealing surfaces, the inner surfaces of the recess and the outer surfaces of the elevation, form a narrow sealing gap.
  • the sealing gap acts as a barrier against fibers which detach from the fiber material during the compression process and enter the axial gap between the suction drum and the drive element. The fibers bounce in the axial gap against the increase and are slowed down by this. Due to the labyrinth-like seal the fibers is forced to change direction by which a passing of the sealing gap is almost impossible.
  • the compression device can be operated without major maintenance.
  • a plurality of circumferential elevations are arranged on the end face of the suction drum and the drive element accordingly has on the side facing the end face of the suction drum a plurality of circumferential recesses into which engage the increases.
  • the at least one increase in the suction drum has a height of 1-5 mm, wherein the height represents the axial extent of the increase starting from the end face of the suction drum in the direction of the approach.
  • the end faces of the suction drum and of the drive element have a spacing of 0.1-0.5 mm. With a narrow gap is achieved that only a small proportion of the detached fibers can get into the gap. In the case of a further gap, it is possible for fibers located in the gap to be able to separate themselves by virtue of the rotation of the suction drum.
  • the at least one elevation forms a step-shaped shoulder between the peripheral surface of the attachment and the end face of the suction drum, so that the shoulder extends from the rotation axis in the radial direction from the outer circumference of the attachment.
  • the outer diameter of the heel is advantageously between 50-75% of the outer diameter of the suction drum.
  • the surface of the shoulder directed radially outward from the axis of rotation is arranged at an angle of 5-45 ° to the axis of rotation, so that the outer diameter of the shoulder decreases steadily towards the end face of the suction drum. Due to the cone-shaped configuration of the paragraph formed between the peripheral surface of the paragraph and the front side of the suction drum a recess in which the fibers can settle. Experiments have shown that this further enhances the sealing effect.
  • the drive element is rotationally symmetrical, so that the at least one recess is present on both side surfaces of the drive element. An incorrect assembly of the drive element is thereby avoided.
  • FIG. 1 shows a schematic side view of a spinning station 1 a spinning machine (ring spinning machine) with a drafting unit 2, which is provided with an input roller pair 3, 4, a middle roller pair 5, 6 and a pair of output rollers 7, 8.
  • a respective straps 10, 11 are guided, which are each held around a cage not shown in detail in its illustrated position.
  • the upper rollers 4, 6, 8 of said pairs of rollers are designed as pressure rollers, which are rotatably mounted on the axes 4a, 6a, 8a on a pivotally mounted pressure arm 9.
  • the pressure arm 9 is pivotally mounted about an axis 12 and, as shown schematically, acted upon by a spring element F.
  • the roller pairs 3, 5, 7 are, as indicated schematically, connected to a drive A.
  • the driven lower rollers 3, 5, 7, the pressure rollers 4, 6, 8, and the belt 11 are driven via the belt 10 via friction.
  • the peripheral speed of the driven roller 5 is slightly higher than the peripheral speed of the driven roller 3, so that the drafting unit 2 supplied fiber material in the form of a sliver L between the input roller pair 3.4 and the middle roller pair 5, 6 is subjected to a pre-delay.
  • the main distortion of the fiber L arises between the middle roller pair 5, 6 and the pair of output rollers 7, 8, wherein the output roller 7 has a substantially higher peripheral speed than the center roller 5.
  • FIG. 2 View X after Fig. 1
  • a pressure arm 9 is assigned to two adjacent drafting unit units 2 (twin drafting system). Since these are the same or partially mirror-inverted elements of the adjacent drafting unit 2, or compacting devices VM, the same reference numerals are used for these parts.
  • the spinning machine has a pivotally mounted compacting device VM for compacting a fiber material V discharged from the drafting unit 2.
  • the compacting device VM is subsequently attached to the drafting device 2.
  • the compression device VM has two suction air acted upon, driven and rotating suction drums 14, which are axially parallel and spaced apart on a support 16 rotatably mounted.
  • the carrier 16 has a suction channel SK connected to a vacuum source SP, which is connected to the interior of the suction drums 14 via corresponding inserts 15.
  • the compacting device VM is in the WO 2012068692 A1 described in detail.
  • the drawn out of the output roller pair 7, 8 stretched fiber material V is deflected downward and enters the region of a suction zone SZ a subsequent suction drum 14.
  • the respective suction drum 14 is provided with extending on its circumference perforations or openings ⁇ .
  • a stationary mounted suction insert 15 is arranged in each case. As schematic FIG. 2 can be seen, the respective suction insert 15 are held by not shown in detail holding means of the carrier 16 in its installed stationary position.
  • the respective suction insert 15 has a suction slot S (in a partial region of its circumference). Fig.2 ), which extends substantially over the suction zone SZ.
  • the respective suction drum 14 is rotatably mounted on a shaft 17 in the region of its outer end via a bearing K.
  • a locking ring 18 is mounted on the shaft 17, which prevents the axial displacement of the suction drum 14 during operation.
  • the shaft 17 is fixed in a receptacle 19 of the carrier 16.
  • the shaft 17 has a somewhat larger diameter in the region of the receptacle 19, while the ends of the shaft 17, which extend from this receptacle to both sides, have a tapered diameter and serve to accommodate the respective bearings K.
  • the respective suction drum 14 has on its end face 35, that is, at the end pointing away from the carrier 16, in each case an annular projection 13 with the outer diameter D1.
  • On a portion of the outer circumference AU of the projection 13 is a portion of the inner surface IF of an annular drive member 20, wherein the inside diameter of this inner surface IF has a diameter D2.
  • the drive element 20 is designed as a friction wheel.
  • the respective suction drum 14 is in a working position in which the outer circumference U of the drive element 20 rests on a correspondingly applied pressure load on the outer circumference of the driven output roller 7.
  • the drive element 20 is driven by friction from the roller 7 in a first gear stage.
  • the friction wheel 20 likewise transmits the drive in a second gear stage to the annular shoulder 13 of the suction drum 14 via friction. This occurs at the point where the inner surface IF with the inner diameter D2 of the friction wheel 20 and the outer circumference AU of the projection 13 with the outer diameter Touch D1 or lie on top of each other.
  • the annular drive element is provided on its outer circumference with a toothing in the Engaging with a toothing of the output roller 7, wherein the drive element has a clear width with an inner surface IF, which rests on the flat outer surface AU of the projection 13, as in the example of FIG. 2 will be shown. That is, the first gear stage has a positive drive connection in this embodiment, while the second gear stage takes place via a frictional engagement.
  • FIG. 2 in the region of the annular projection 13, a cover cap 21 is fixed, which projects beyond the inside diameter D2 of the friction wheel 20 with its outer diameter.
  • the end cap 21 is provided with an annular projection 40 which projects into the inside width of the annular projection 13 of the suction drum 14.
  • the outer dimension of the annular projection 40 is chosen so that it is in the in FIG. 2 shown position exerts a clamping action within the clear width of the neck 13.
  • the annular cap 40 may be provided with additional outwardly projecting cams, which engage for fixing the end cap 21 in circumferential recesses within the clear width of the projection 13.
  • individual fibers can be separated from the fiber material V to be compacted and deposited on the circumference 38 of the suction drum 14. These fibers can move in the direction of the end face 35 of the suction drum 14 and thereby reach into the axial gap between the end face 35 of the suction drum 14 and the friction wheel 20.
  • the movement of the fibers can be generated, for example, by the rotation of the suction drum 14 or the air flow arising during the rotation of the suction drum 14. In this case, there is a risk that fibers that reach the axial gap, move up to the outer circumference AU of the neck 13 and attach to this.
  • FIG. 2 It can be seen that 17, two suction drums 14 of adjacent spinning stations are rotatably mounted on the, fixed to the carrier 16 shaft 17.
  • the suction drums 14 are arranged with a respective friction wheel 20 in mirror image with respect to the carrier 16.
  • a pinch roller 23 is provided for each of the suction drums 14, which rests on a pressure load on the respective suction drum 14 and forms a nip line P with this.
  • the respective pinch roller 23 is rotatably mounted on an axle 22 which is fixed to a bearing element 25 which is connected via screws 27 with a spring element 26.
  • the spring element 26, via which a pressing force of the pinch roller 23 is generated in the direction of the suction drum 14, is fastened to the carrier 16 via the screws 27, which are shown schematically.
  • the nip P at the same time forms a so-called "rotation blocking gap", from which the fiber material in the conveying direction FS in the form of a compressed yarn FK is supplied under rotation distribution of a ring spinning device 1 shown schematically.
  • a suction channel SK which has an opening S2 on the inner surface of the end piece of the carrier 16 and a further opening S1, which is arranged in the region of the receptacle 19 and communicates with the interior 29 of the respective suction insert 15.
  • the opening S2 is in the working position of an opening SR of the suction pipe 41 opposite, whereby the interior of the suction pipe 41 is connected to the suction channel SK.
  • FIG. 1 can be seen, the suction pipe 41 via one or more connecting channels 42 with a central main channel 43rd connected.
  • This channel 43 is connected to a vacuum source SP in connection, which can be controlled via a control unit ST.
  • a suction pipe 30 is fastened on both sides of the support 16, whose respective opening 31, which faces the support 16, is fastened to the Channel SK is connected.
  • the end of the respective suction tube 30 projecting outwards from the support 16 is closed.
  • an opening 32 is mounted, which points in the direction of the pulled-down yarn FK. Ie.
  • the end of the further supplied yarn, or yarn is supplied via the respective suction tube 30 under the action of the negative pressure generated via the vacuum source SP via the suction channel SK to the suction tube 30, which this via the channels or 42 for further Transfer to a collection point to the main channel 43 outputs.
  • FIG. 3 is an enlarged partial view Y after Fig. 2 an embodiment of an inventive suction drum 14 with drive element 20 shown.
  • the suction drum 14 has on its end face 35 on an annular elevation 36.
  • the elevation 36 runs coaxially with the projection 13 of the suction drum 14 and is arranged at a radial distance from the axis of rotation (A1) to the outer circumference AU of the projection 13.
  • the elevation 36 has a height H of 1-5mm.
  • the height H extends in the axial direction to the suction drum 14.
  • the drive element 20 has on its end face 35 of the suction drum 14 directed end face 46 an annular recess 37, into which the elevation 36 protrudes.
  • the elevation 36 and the depression 37 act together in such a way that the sealing surfaces lying opposite one another in the axial and radial directions form a narrow sealing gap DS.
  • the sealing gap DS (labyrinth seal) acts as a barrier against fibers which have detached during the compression process from the fiber material to be compacted V and in the axial gap A between the end face 35 of the suction drum 14 and the end face 46 of the drive element 20 passes. The fibers bounce in the axial gap A against the elevation 36 and are thereby braked. Due to the labyrinthine Seal the fibers is forced to change direction by which a passing of the sealing gap DS is made difficult.
  • the suction drum 14 has an anodized coating and is provided with running on its circumference perforations, or openings ⁇ .
  • the openings ⁇ form a single-row hole pattern.
  • a stationary mounted suction insert 15 is arranged, which has a suction slot S on a portion of its circumference.
  • the absorbent insert 15 is not shown in detail holding means on a support 16 (FIG. Fig.2 ) held in its installed stationary position.
  • the suction drum 14 is rotatably mounted in the region of its outer end via a bearing K on a shaft 17, wherein the bearing K abuts against a stop 34 of the suction drum 14 and is mounted from the outer end of the suction drum 14.
  • a locking ring 18 is mounted on the shaft 17, which prevents the axial displacement of the suction drum 14 during operation. It is also possible that the suction drum 14 is rotatably mounted on the shaft 17 and the shaft 17 is rotatably mounted.
  • a transparent end cap 21 is fixed, which with its outer diameter, the clear width D2 of the friction wheel 20th surmounted.
  • the end cap 21 is provided with an annular projection 40 which projects into the inside width of the annular projection 13 of the suction drum 14.
  • the annular top 40 is provided with additional outwardly projecting cams, which engage in the circumferential width of the neck 13 for fixing the end cap 21 in circumferential recesses.
  • FIG. 4 a further embodiment of a suction drum 14 according to the invention with drive element 20 is shown.
  • the suction drum 14 is as in the previous embodiment ( Figure 3 ) is mounted on a shaft 17 in the region of its outer end via a bearing K.
  • a locking ring 18 is mounted on the shaft 17, which prevents the axial displacement of the suction drum 14 during operation.
  • the suction drum 14 is provided with running on its circumference 38 perforations, or openings ⁇ .
  • a stationary mounted suction insert 15 is arranged, which has a suction slot S on a portion of its circumference.
  • the absorbent insert 15 is not shown in detail holding means on a support 16 (FIG. Fig.2 ) held in its installed stationary position.
  • the suction drum 14 between the outer circumference AU of the projection 13 and the end face 35 of the suction drum 14 has a stepped shoulder 36.
  • the surface 39 of the shoulder 36 directed radially outward from the axis of rotation A1 is designed to be conical, so that the external diameter DE (FIG. Figure 5 ) of paragraph 36 to the end face 35 of the suction drum 14 towards steadily decreases.
  • the friction wheel 20 is rotationally symmetrical and has on its two sides an annular groove 37,45 which extends radially outwardly from the inner surface IF of the friction wheel 20.
  • the groove 37, 45 is adapted to receive the shoulder 36. Due to the rotationally symmetrical design of the friction wheel 20 incorrect assembly of the friction wheel 20 is avoided
  • a cover cap 21 is fixed, which protrudes with its outer diameter into the groove 45 of the friction wheel 20.
  • the end cap 21 with an annular projection 40th provided, which projects into the clear width of the annular projection 13 of the suction drum 14.
  • the axial gap A is between 0.1-0.5mm.
  • a narrow sealing gap DS sets. The sealing gap DS prevents fibers which pass from the periphery 38 of the suction drum 14 into the gap A to move to the outer circumference AU of the projection 13 and settle there.
  • FIG. 5 View Z from Figure 4
  • the shoulder 36 of the suction drum 14 is shown enlarged.
  • the radially outwardly directed surface 39 of the shoulder 36 from the axis of rotation A1 is arranged at an angle b of 5-45 ° to the axis of rotation A1, in such a way that the outer diameter DE of the shoulder 36 decreases steadily towards the end face 35 of the suction drum 14.
  • the serrated configuration of the shoulder 36 is formed between the surface 39 of the shoulder 36 and the end face 35 of the suction drum 14 has a recess 44. In the recess 44, fibers can settle, from the periphery 38 of the suction drum 14 in the gap A (FIG. Figure 4 ) reach.
  • the height H of paragraph 36 is between 1-5mm.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Description

Die Erfindung bezieht sich auf eine drehbar gelagerte Saugtrommel einer Vorrichtung zum Verdichten eines Fasergutes an einer Spinnmaschine mit einem ringförmigen Antriebselement, welches in Betriebsstellung mit einem Teilbereich seiner Innenfläche auf einem Teilbereich einer kreisförmigen Umfangsfläche eines, koaxial zu einer Drehachse der Saugtrommel verlaufenden und an einer Stirnseite der Saugtrommel angebrachten Ansatzes aufliegt.The invention relates to a rotatably mounted suction drum of a device for compacting a fiber material on a spinning machine with an annular drive element, which in operating position with a portion of its inner surface on a portion of a circular peripheral surface of a coaxially to a rotational axis of the suction drum and on an end face the suction drum attached approach rests.

In der WO 2012068692 A1 ist eine Vorrichtung zum Verdichten eines Fasergutes an einer Spinnmaschine beschrieben, welche für den nachträglichen Anbau an eine konventionelle Streckwerkseinrichtung einer Spinnmaschine vorgesehen ist. Die Vorrichtung ist dabei der Streckwerkseinheit der Spinnmaschine nachgeordnet und dient dazu, ein von der Streckwerkseinheit abgegebenes Fasergut zu verdichten (kompaktieren). Im Anschluss an die Verdichtungsvorrichtung wird das verdichtete Fasergut, nach Passieren einer Klemmstelle, einer Drallerzeugungsvorrichtung zugeführt. Die Drallerzeugungsvorrichtung besteht dabei z. B. bei einer Ringspinnmaschine aus einem Läufer, der auf einem Ring umläuft, wobei das erzeugte Garn auf eine rotierende Hülse aufgewickelt wird.In the WO 2012068692 A1 a device for compacting a fiber material is described on a spinning machine, which is intended for retrofitting to a conventional drafting device of a spinning machine. The device is arranged downstream of the drafting unit of the spinning machine and serves to compact (compact) a fiber material discharged from the drafting unit. Subsequent to the compacting device, the compacted fiber material, after passing through a nip, is fed to a swirl-generating device. The swirl-generating device consists of z. Example, in a ring spinning machine from a rotor which rotates on a ring, wherein the yarn produced is wound on a rotating sleeve.

Die in der WO 2012068692 A1 beschriebene Verdichtungsvorrichtung weist für den Einsatz an den üblichen Zwillingsstreckwerken an Ringspinnmaschinen zwei mit Saugluft beaufschlagte, angetriebene und umlaufende Saugtrommeln auf, welche achsparallel und im Abstand zueinander auf einem Träger drehbar gelagert sind. Damit sind zwei Saugtrommeln als Einheit (Modul) einem Zwillingsstreckwerk zugeordnet. Der Träger weist einen an eine Unterdruckquelle angeschlossenen Saugkanal auf, der mit dem Innenraum der Saugtrommeln über entsprechende Einsätze verbunden ist. Die Einsätze sind dabei mit entsprechend geformten Saugschlitzen versehen, wodurch eine entsprechende Luftströmung an der Peripherie der jeweiligen Saugtrommel in einem Verdichtungsbereich erzeugt wird. Durch diese Luftströmung, welche im Wesentlichen quer zur Transportrichtung des Fasergutes ausgerichtet ist, werden abstehende Fasern in das Fasergut mit eingebunden.The in the WO 2012068692 A1 described compression device has for use on the usual twin drafting of ring spinning machines on two acted upon with suction, driven and rotating suction drums, which are axially parallel and at a distance to each other rotatably mounted on a support. This means that two suction drums are assigned as a unit (module) to a twin drafting system. The carrier has a suction channel connected to a vacuum source, which is connected to the interior of the suction drums via corresponding inserts. The inserts are provided with correspondingly shaped suction slots, whereby a corresponding air flow is generated at the periphery of the respective suction drum in a compression region. By this air flow, which is aligned substantially transversely to the transport direction of the fiber material, protruding fibers are involved in the fiber material.

CH705843 bezieht sich auf eine Absaugvorrichtung für zwei benachbart zueinander angeordnete Streckwerkseinheiten einer Spinnmaschine mit einem Sammelrohr und zwei, ausgehend vom Sammelrohr, in entgegen gesetzter Richtung verlaufenden Absaugrohren, deren nach aussen gerichteten Öffnungen gegen das, von der jeweiligen Streckwerkseinheit abgegebene Garn gerichtet ist, wobei ihre, den aussen liegenden Öffnungen gegenüberliegenden Enden mit jeweils einer innen liegenden Öffnung in das gemeinsame Sammelrohr münden. Um bekannte Absaugvorrichtungen in der Herstellung zu vereinfachen und um Verstopfungen zu vermeiden, wird vorgeschlagen, dass die nach aussen gerichteten Öffnungen der Absaugrohre in entgegen gesetzter Richtung zeigen und die, in das Sammelrohr mündenden Öffnungen der Absaugrohre einander koaxial gegenüberstehen. CH705843 refers to a suction device for two adjacent to each other drafting units of a spinning machine with a manifold and two, starting from the manifold, extending in the opposite direction suction tubes whose outwardly directed openings directed against the output from the respective drafting unit yarn, wherein their the opposite ends of the openings open, each with an inner opening in the common manifold. In order to simplify known suction in the manufacture and to avoid blockages, it is proposed that the outwardly directed openings of the suction show in the opposite direction and the opening into the manifold openings of the suction tubes face each other coaxially.

Den Saugtrommeln ist jeweils ein ringförmiges Antriebselement in Form eines Reibrades zugeordnet, das unter Einwirkung einer Druckbelastung mit seiner kreisförmigen Innenfläche teilweise auf der kreisförmigen Umfangsfläche eines an der Stirnseite der jeweiligen Saugtrommel angeordneten Ansatzes aufliegt. Dabei wird die Drehbewegung des über den Aussenumfang angetriebenen Reibrades über Friktion auf die Umfangsfläche des Ansatzes übertragen, welcher mit der Saugtrommel verbunden ist. Das Reibrad wird über einen Reibschluss von der angetriebenen unteren Ausgangswalze des Streckwerks angetrieben. Durch eine am Ende des Ansatzes befestigte Abschlusskappe wird das Reibrad in axialer Richtung auf dem Ansatz in seiner Position gehalten, wobei in Betriebsstellung zwischen der Stirnseite der Saugtrommel und dem Reibrad ein axialer Spalt besteht.The suction drums are each assigned an annular drive element in the form of a friction wheel, which rests under the action of a compressive load with its circular inner surface partially on the circular peripheral surface of a arranged on the end face of the respective suction drum approach. The rotational movement of the driven over the outer circumference friction wheel is transmitted via friction on the peripheral surface of the neck, which is connected to the suction drum. The friction wheel is driven by a frictional engagement of the driven lower output roller of the drafting system. By attached to the end of the approach end cap, the friction wheel is held in the axial direction on the approach in its position, wherein in the operating position between the end face of the suction drum and the friction wheel, an axial gap exists.

Während des Verdichtungsvorgangs können sich einzelne Fasern vom zu verdichtenden Fasergut lösen und am Umfang der Saugtrommel ablagern. Diese Fasern können sich in Richtung der Stirnseite der Saugtrommel fortbewegen und dabei in den axialen Spalt zwischen der Stirnseite der Saugtrommel und dem Reibrad gelangen. Die Bewegung der Fasern kann z.B durch die Rotation der Saugtrommel erzeugt werden oder die bei der Rotation der Saugtrommel entstehende Luftströmung. Hierbei besteht die Gefahr, dass Fasern, die in den axialen Spalt gelangen, sich bis an den Aussenumfang des Ansatzes fortbewegen und an diesem festsetzen. Dies hat zur Folge, dass die Innenfläche des Reibrades nicht mehr in direktem Kontakt mit dem Aussenumfang des Ansatzes steht, wodurch eine kontinuierliche Übertragung des Antriebsmoments vom Reibrad auf die Saugtrommel nicht mehr gewährleistet ist. Als Folge ändert sich das Geschwindigkeitsverhältnis zwischen der Saugtrommel und der unteren Ausgangswalze des Streckwerks. Hierdurch wird das zu verdichtende Fasergut im Verdichtungsbereich gestaucht, was sich negativ auf die Qualität der Verdichtung des Fasergutes auswirkt. Es besteht daher die Notwendigkeit, das Antriebselement nach einer bestimmten Laufzeit der Verdichtungsvorrichtung von der Saugtrommel zu entfernen und den Aussenumfang des Ansatzes von den angesammelten Fasern zu befreien. Dies ist mit einem hohen Wartungsaufwand und hohen Stillstandzeiten der Spinnmaschine verbunden.During the compression process, individual fibers can be released from the fiber material to be compacted and deposited on the circumference of the suction drum. These fibers can move in the direction of the end face of the suction drum and thereby pass into the axial gap between the end face of the suction drum and the friction wheel. The movement of the fibers can be generated, for example, by the rotation of the suction drum or the air flow generated during the rotation of the suction drum. In this case, there is a risk that fibers that reach the axial gap, move to the outer periphery of the approach and attach to this. This has the consequence that the inner surface of the friction wheel is no longer in direct contact with the outer circumference of the neck, whereby a continuous transmission of the drive torque from the friction wheel on the suction drum is no longer guaranteed. As a result, the speed ratio between the suction drum and the lower output roller of the drafting system changes. As a result, the fiber material to be compressed is compressed in the compression region, which has a negative effect on the quality of the compaction of the fiber material. There is therefore a need to remove the drive element after a certain period of the compacting device of the suction drum and to free the outer periphery of the approach of the accumulated fibers. This is associated with a high maintenance and high downtime of the spinning machine.

Der Erfindung liegt somit die Aufgabe zugrunde die Saugtrommel einer Vorrichtung zum Verdichten eines Fasergutes an einer Spinnmaschine in Verbindung mit dem Antriebselement derart auszubilden, dass Fasern, die sich während des Verdichtungsvorgangs vom zu verdichtenden Fasergut ablösen, nicht im Bereich des Aussenumfangs des an der Stirnseite der Saugtrommel angeordneten Ansatzes ablagern.
Die erfindungsgemässe Saugtrommel kann an einer Verdichtungsvorrichtung zum Einsatz kommen, welche im Anschluss an das jeweilige Streckwerk fest installiert ist, oder welche für den nachträglichen Anbau an eine konventionelle Streckwerkseinrichtung vorgesehen ist. Im Rahmen der vorliegenden Erfindung ist unter einer labyrinthartigen Dichtung eine vorzugsweise berührungslose Abdichtung zu verstehen, welche durch ein Ineinandergreifen von Formelementen erreicht wird.The invention is therefore the object of the suction drum of a device for compressing a fiber material on a spinning machine in conjunction with the drive element form such that fibers that come off during the compression process of the fiber material to be compacted, not in the region of the outer periphery of the front of Suction drum arranged approach deposit.
The suction drum according to the invention can be used on a compacting device, which is permanently installed following the respective drafting system, or which is provided for retrofitting to a conventional drafting device. In the context of the present invention, a labyrinth-type seal is to be understood as meaning a preferably non-contact seal which is achieved by the intermeshing of molded elements.

Die Aufgabe wird durch die Merkmale von Anspruch 1 gelöst.The object is solved by the features of claim 1.

Die Erhöhung und die Vertiefung wirken derart zusammen, dass die einander gegenüberliegenden Dichtungsflächen, die Innenflächen der Vertiefung und die Aussenflächen der Erhöhung, einen engen Dichtspalt bilden. Der Dichtspalt wirkt als Barriere gegen Fasern, die sich während des Verdichtungsvorgangs vom Fasergut ablösen und in den axialen Spalt zwischen der Saugtrommel und dem Antriebselement gelangen. Die Fasern prallen im axialen Spalt gegen die Erhöhung und werden durch diese abgebremst. Aufgrund der labyrinthartigen Dichtung wird den Fasern ein Richtungswechsel auf erzwungen, durch welchen ein Passieren des Dichtspalts fast unmöglich wird.The elevation and the recess cooperate in such a way that the opposing sealing surfaces, the inner surfaces of the recess and the outer surfaces of the elevation, form a narrow sealing gap. The sealing gap acts as a barrier against fibers which detach from the fiber material during the compression process and enter the axial gap between the suction drum and the drive element. The fibers bounce in the axial gap against the increase and are slowed down by this. Due to the labyrinth-like seal the fibers is forced to change direction by which a passing of the sealing gap is almost impossible.

Durch das Zusammenwirken der Erhöhung und der Vertiefung gelingt es, den Faserfluss im axialen Spalt zwischen der Saugtrommel und dem Antriebselement zu kontrollieren. Es wird somit vermieden, dass Fasern bis an den Aussenumfang des an der Stirnseite der Saugtrommel angeordneten Ansatzes fliessen und sich dort ablagern. Hierdurch ist gewährleistet, dass während des Betriebs der Verdichtungsvorrichtung die Innenfläche des Antriebselements in direktem Kontakt mit dem Aussenumfang des Ansatzes der Saugtrommel steht. Eine kontinuierliche Übertragung des Antriebsmoments vom Antriebselement auf die Saugtrommel ist somit sichergestellt. Im Unterschied zum Stand der Technik kann die Verdichtungsvorrichtung dadurch ohne grösseren Wartungsaufwand betrieben werden. Um die Abdichtung noch zu verstärken, ist es zudem möglich, dass an der Stirnseite der Saugtrommel mehrere umlaufende Erhöhungen angeordnet sind und das Antriebselement dementsprechend an der zur Stirnseite der Saugtrommel gerichteten Seite mehrere umlaufende Vertiefungen aufweist, in welche die Erhöhungen eingreifen.Through the interaction of the increase and the depression, it is possible to control the fiber flow in the axial gap between the suction drum and the drive element. It is thus avoided that fibers flow to the outer periphery of the arranged on the front side of the suction drum approach and settle there. This ensures that during operation of the compacting device, the inner surface of the drive element is in direct contact with the outer circumference of the approach of the suction drum. A continuous transmission of the drive torque from the drive element to the suction drum is thus ensured. In contrast to the prior art, the compression device can be operated without major maintenance. To reinforce the seal even more, it is also possible that a plurality of circumferential elevations are arranged on the end face of the suction drum and the drive element accordingly has on the side facing the end face of the suction drum a plurality of circumferential recesses into which engage the increases.

Als vorteilhaft hat es sich erwiesen, wenn die wenigstens eine Erhöhung der Saugtrommel eine Höhe von 1-5mm aufweist, wobei die Höhe die axiale Erstreckung der Erhöhung ausgehend von der Stirnseite der Saugtrommel in Richtung des Ansatzes darstellt. Versuche haben ergeben, dass bei einer Höhe der Erhöhung in diesem Bereich eine hohe Dichtwirkung erzielt wird.It has proven to be advantageous if the at least one increase in the suction drum has a height of 1-5 mm, wherein the height represents the axial extent of the increase starting from the end face of the suction drum in the direction of the approach. Experiments have shown that at a level of increase in this area a high sealing effect is achieved.

Zudem ist es von Vorteil, wenn ausserhalb der Erhöhung und der Vertiefung die Stirnseiten der Saugtrommel und des Antriebselements einen Abstand von 0.1-0.5mm aufweisen. Mit einem engen Spalt wird erreicht, dass lediglich ein geringer Anteil der abgelösten Fasern in den Spalt gelangen kann. Bei einem weiteren Spalt besteht die Möglichkeit, dass sich im Spalt befindende Fasern durch die Rotation der Saugtrommel eigenständig lösen können.In addition, it is advantageous if, outside the elevation and the depression, the end faces of the suction drum and of the drive element have a spacing of 0.1-0.5 mm. With a narrow gap is achieved that only a small proportion of the detached fibers can get into the gap. In the case of a further gap, it is possible for fibers located in the gap to be able to separate themselves by virtue of the rotation of the suction drum.

Auch ist es vorteilhaft, wenn die wenigstens eine Erhöhung einen stufenförmigen Absatz zwischen der Umfangsfläche des Ansatzes und der Stirnseite der Saugtrommel bildet, so dass sich der Absatz von der Drehachse in radialer Richtung vom Aussenumfang des Ansatzes erstreckt. Der Aussendurchmesser des Absatzes beträgt dabei vorteilhafterweise zwischen 50-75% des Aussendurchmessers der Saugtrommel. Versuche haben ergeben, dass mittels des stufenförmigen Absatzes eine hohe Dichtwirkung erzielt wird. Zudem ist eine Saugtrommel mit einem stufenförmigen Absatz einfach und somit kostengünstig herstellbar.It is also advantageous if the at least one elevation forms a step-shaped shoulder between the peripheral surface of the attachment and the end face of the suction drum, so that the shoulder extends from the rotation axis in the radial direction from the outer circumference of the attachment. The outer diameter of the heel is advantageously between 50-75% of the outer diameter of the suction drum. Experiments have shown that a high sealing effect is achieved by means of the step-shaped shoulder. In addition, a suction drum with a stepped heel is simple and thus inexpensive to produce.

Von Vorteil ist es auch, wenn die von der Drehachse aus radial nach aussen gerichtete Fläche des Absatzes unter einem Winkel von 5-45° zur Drehachse angeordnet ist, so dass der Aussendurchmesser des Absatzes zur Stirnseite der Saugtrommel hin stetig abnimmt. Durch die konusförmige Ausgestaltung des Absatzes entsteht zwischen der Umfangsfläche des Absatzes und der Stirnseite der Saugtrommel eine Vertiefung, in welcher sich die Fasern absetzen können. Versuche haben ergeben, dass hierdurch die Dichtwirkung weiter verstärkt wird.It is also advantageous if the surface of the shoulder directed radially outward from the axis of rotation is arranged at an angle of 5-45 ° to the axis of rotation, so that the outer diameter of the shoulder decreases steadily towards the end face of the suction drum. Due to the cone-shaped configuration of the paragraph formed between the peripheral surface of the paragraph and the front side of the suction drum a recess in which the fibers can settle. Experiments have shown that this further enhances the sealing effect.

Schliesslich ist es von Vorteil, wenn das Antriebselement rotationssymmetrisch ausgebildet ist, so dass die wenigstens eine Vertiefung an beiden Seitenflächen des Antriebselements vorhanden ist. Eine Fehlmontage des Antriebselements wird hierdurch vermieden.Finally, it is advantageous if the drive element is rotationally symmetrical, so that the at least one recess is present on both side surfaces of the drive element. An incorrect assembly of the drive element is thereby avoided.

Die Erfindung wird anhand nachfolgender Ausführungsbeispiele näher gezeigt und beschrieben. Es zeigen:

Fig.1
eine schematische Seitenansicht einer Spinnstelle einer Ringspinnmaschine mit einer Streckwerkseinheit und einer anschliessenden Verdichtungsvorrichtung,
Fig.2
eine vergrösserte Teilansicht X nach Fig.1 mit zwei nebeneinander liegenden Streckwerkseinheiten und zwei drehbar gelagerten Saugtrommeln einer an einem Träger befestigten Verdichtungsvorrichtung,
Fig. 3
eine vergrösserte Teilansicht Y nach Fig. 2 einer erfindungsgemäss ausgebildeten Saugtrommel und Antriebselement,
Fig. 4
eine weitere Ausführungsform einer erfindungsgemässen Saugtrommel und Antriebselement entsprechend Fig.3,
Fig. 5
eine vergrösserte Teilansicht Z nach Fig. 4.
The invention will be shown and described in more detail by means of subsequent embodiments. Show it:
Fig.1
a schematic side view of a spinning station of a ring spinning machine with a drafting unit and a subsequent compacting device,
Fig.2
an enlarged partial view X after Fig.1 with two adjacent drafting units and two rotatably mounted suction drums of a compacting device attached to a carrier,
Fig. 3
an enlarged partial view Y after Fig. 2 a suction drum and drive element designed according to the invention,
Fig. 4
a further embodiment of an inventive suction drum and drive element accordingly Figure 3 .
Fig. 5
an enlarged partial view Z after Fig. 4 ,

Figur 1 zeigt eine schematische Seitenansicht einer Spinnstelle 1 einer Spinnmaschine (Ringspinnmaschine) mit einer Streckwerkseinheit 2, welche mit einem Eingangswalzenpaar 3, 4, einem Mittelwalzenpaar 5, 6 und einem Ausgangswalzenpaar 7, 8 versehen ist. Um die Mittelwalzen 5, 6 ist jeweils ein Riemchen 10, 11 geführt, die jeweils um einen nicht näher gezeigten Käfig in ihrer dargestellten Lage gehalten werden. Die oberen Walzen 4, 6, 8 der genannten Walzenpaare sind als Druckwalzen ausgeführt, welche über die Achsen 4a, 6a, 8a an einem schwenkbar gelagerten Druckarm 9 drehbeweglich gelagert sind. Der Druckarm 9 ist um eine Achse 12 schwenkbar gelagert und wird, wie schematisch dargestellt, über ein Federelement F beaufschlagt. Über die schematisch gezeigte Federbelastung werden die Walzen 4, 6, 8 gegen die unteren Walzen 3, 5 und 7 der Walzenpaare gedrückt. Die Walzenpaare 3, 5, 7 sind, wie schematisch angedeutet, mit einem Antrieb A verbunden. Über die angetriebenen Unterwalzen 3, 5, 7 werden die Druckwalzen 4, 6, 8, bzw. das Riemchen 11 über das Riemchen 10 über Friktion angetrieben. Die Umfangsgeschwindigkeit der angetriebenen Walze 5 ist etwas höher als die Umfangsgeschwindigkeit der angetriebenen Walze 3, sodass das, der Streckwerkeinheit 2 zugeführte Fasergut in Form einer Lunte L zwischen dem Eingangswalzenpaar 3,4 und dem Mittenwalzenpaar 5, 6 einem Vorverzug unterworfen wird. Der Hauptverzug des Fasergutes L entsteht zwischen dem Mittenwalzenpaar 5, 6 und dem Ausgangswalzenpaar 7, 8, wobei die Ausgangswalze 7 eine wesentlich höhere Umfangsgeschwindigkeit als die Mittenwalze 5 aufweist. FIG. 1 shows a schematic side view of a spinning station 1 a spinning machine (ring spinning machine) with a drafting unit 2, which is provided with an input roller pair 3, 4, a middle roller pair 5, 6 and a pair of output rollers 7, 8. To the center rollers 5, 6, a respective straps 10, 11 are guided, which are each held around a cage not shown in detail in its illustrated position. The upper rollers 4, 6, 8 of said pairs of rollers are designed as pressure rollers, which are rotatably mounted on the axes 4a, 6a, 8a on a pivotally mounted pressure arm 9. The pressure arm 9 is pivotally mounted about an axis 12 and, as shown schematically, acted upon by a spring element F. About the spring load shown schematically, the rollers 4, 6, 8 pressed against the lower rollers 3, 5 and 7 of the roller pairs. The roller pairs 3, 5, 7 are, as indicated schematically, connected to a drive A. About the driven lower rollers 3, 5, 7, the pressure rollers 4, 6, 8, and the belt 11 are driven via the belt 10 via friction. The peripheral speed of the driven roller 5 is slightly higher than the peripheral speed of the driven roller 3, so that the drafting unit 2 supplied fiber material in the form of a sliver L between the input roller pair 3.4 and the middle roller pair 5, 6 is subjected to a pre-delay. The main distortion of the fiber L arises between the middle roller pair 5, 6 and the pair of output rollers 7, 8, wherein the output roller 7 has a substantially higher peripheral speed than the center roller 5.

Wie aus Figur 2 (Ansicht X nach Fig. 1) zu entnehmen ist, ist ein Druckarm 9 zwei benachbarten Streckwerkseinheiten 2 (Zwillingsstreckwerk) zugeordnet. Da es sich um die gleichen, bzw. teilweise spiegelbildlich angeordneten Elemente der benachbarten Streckwerkseinheiten 2, bzw. Verdichtungsvorrichtungen VM handelt, werden für diese Teile die gleichen Bezugszeichen verwendet.How out FIG. 2 (View X after Fig. 1 ), a pressure arm 9 is assigned to two adjacent drafting unit units 2 (twin drafting system). Since these are the same or partially mirror-inverted elements of the adjacent drafting unit 2, or compacting devices VM, the same reference numerals are used for these parts.

Im Anschluss an die Streckwerkseinheit 2 weisst die Spinnmaschine eine schwenkbar gelagerte Verdichtungsvorrichtung VM zum Verdichten eines von der Streckwerkseinheit 2 abgegebenen Fasergutes V auf. Die Verdichtungsvorrichtung VM ist dabei nachträglich an die Streckwerkseinrichtung 2 angebaut. Die Verdichtungsvorrichtung VM weist zwei mit Saugluft beaufschlagte, angetriebene und umlaufende Saugtrommeln 14 auf, welche achsparallel und im Abstand zueinander auf einem Träger 16 drehbar gelagert sind. Der Träger 16 weist einen an eine Unterdruckquelle SP angeschlossenen Saugkanal SK auf, der mit dem Innenraum der Saugtrommeln 14 über entsprechende Einsätze 15 verbunden ist. Die Verdichtungsvorrichtung VM ist in der WO 2012068692 A1 detailliert beschrieben.Subsequent to the drafting unit 2, the spinning machine has a pivotally mounted compacting device VM for compacting a fiber material V discharged from the drafting unit 2. The compacting device VM is subsequently attached to the drafting device 2. The compression device VM has two suction air acted upon, driven and rotating suction drums 14, which are axially parallel and spaced apart on a support 16 rotatably mounted. The carrier 16 has a suction channel SK connected to a vacuum source SP, which is connected to the interior of the suction drums 14 via corresponding inserts 15. The compacting device VM is in the WO 2012068692 A1 described in detail.

Das von dem Ausgangswalzenpaar 7, 8 abgegebene verstreckte Fasergut V wird nach unten abgelenkt und gelangt in den Bereich einer Saugzone SZ einer nachfolgenden Saugtrommel 14. Die jeweilige Saugtrommel 14 ist mit auf ihrem Umfang verlaufenden Perforationen, bzw. Öffnungen Ö versehen. Innerhalb der drehbar gelagerten Saugtrommel 14 ist jeweils ein stationär gelagerter Saugeinsatz 15 angeordnet. Wie schematisch aus Figur 2 zu entnehmen, kann der jeweilige Saugeinsatz 15 über nicht näher gezeigte Haltemittel von dem Träger 16 in seiner eingebauten stationären Lage gehalten werden.The drawn out of the output roller pair 7, 8 stretched fiber material V is deflected downward and enters the region of a suction zone SZ a subsequent suction drum 14. The respective suction drum 14 is provided with extending on its circumference perforations or openings Ö. Within the rotatably mounted suction drum 14, a stationary mounted suction insert 15 is arranged in each case. As schematic FIG. 2 can be seen, the respective suction insert 15 are held by not shown in detail holding means of the carrier 16 in its installed stationary position.

Wie schematisch angedeutet, weist der jeweilige Saugeinsatz 15 auf einem Teilbereich seines Umfanges einen Saugschlitz S (Fig.2) auf, der sich im Wesentlichen über die Saugzone SZ erstreckt. Die jeweilige Saugtrommel 14 ist im Bereich ihres äusseren Endes über ein Lager K auf einer Welle 17 drehbar gelagert. Zur axialen Fixierung der Saugtrommel 14 auf der Welle 17 ist auf der Welle 17 ein Sicherungsring 18 angebracht, der das axiale Verschieben der Saugtrommel 14 während des Betriebes unterbindet.As indicated schematically, the respective suction insert 15 has a suction slot S (in a partial region of its circumference). Fig.2 ), which extends substantially over the suction zone SZ. The respective suction drum 14 is rotatably mounted on a shaft 17 in the region of its outer end via a bearing K. For axial fixation of the suction drum 14 on the shaft 17, a locking ring 18 is mounted on the shaft 17, which prevents the axial displacement of the suction drum 14 during operation.

Die Welle 17 ist in einer Aufnahme 19 des Trägers 16 befestigt. Die Welle 17 weist im Bereich der Aufnahme 19 einen etwas grösseren Durchmesser auf, während die, von dieser Aufnahme nach beiden Seiten sich erstreckenden Enden der Welle 17 einen verjüngten Durchmesser aufweisen und zur Aufnahme der jeweiligen Lager K dienen. Die jeweilige Saugtrommel 14 weist an ihrer Stirnseite 35, d.h an dem vom Träger 16 wegzeigenden Ende, jeweils einen ringförmigen Ansatz 13 auf mit dem Aussendurchmesser D1. Auf einem Teilbereich des Aussenumfanges AU des Ansatzes 13 liegt ein Teilbereich der Innenfläche IF eines ringförmigen Antriebelements 20 auf, wobei die lichte Weite dieser Innenfläche IF einen Durchmesser D2 aufweist. Das Antriebselement 20 ist als ein Reibrad ausgeführt.The shaft 17 is fixed in a receptacle 19 of the carrier 16. The shaft 17 has a somewhat larger diameter in the region of the receptacle 19, while the ends of the shaft 17, which extend from this receptacle to both sides, have a tapered diameter and serve to accommodate the respective bearings K. The respective suction drum 14 has on its end face 35, that is, at the end pointing away from the carrier 16, in each case an annular projection 13 with the outer diameter D1. On a portion of the outer circumference AU of the projection 13 is a portion of the inner surface IF of an annular drive member 20, wherein the inside diameter of this inner surface IF has a diameter D2. The drive element 20 is designed as a friction wheel.

In der in Figur 2 gezeigten Lage befindet sich die jeweilige Saugtrommel 14 in einer Arbeitsposition, in welcher der Aussenumfang U des Antriebelementes 20 über eine entsprechend aufgebrachte Druckbelastung auf dem Aussenumfang der angetriebenen Ausgangswalze 7 aufliegt. D. h. das Antriebselement 20 wird über Friktion von der Walze 7 in einer ersten Getriebestufe angetrieben. Ebenfalls über Friktion überträgt das Reibrad 20 den Antrieb in einer zweiten Getriebestufe auf den ringförmigen Ansatz 13 der Saugtrommel 14. Dies erfolgt an der Stelle, wo sich die Innenfläche IF mit dem Innendurchmesser D2 des Reibrades 20 und der Aussenumfang AU des Ansatzes 13 mit dem Aussendurchmesser D1 berühren bzw. aufeinander liegen.In the in FIG. 2 shown position, the respective suction drum 14 is in a working position in which the outer circumference U of the drive element 20 rests on a correspondingly applied pressure load on the outer circumference of the driven output roller 7. Ie. the drive element 20 is driven by friction from the roller 7 in a first gear stage. The friction wheel 20 likewise transmits the drive in a second gear stage to the annular shoulder 13 of the suction drum 14 via friction. This occurs at the point where the inner surface IF with the inner diameter D2 of the friction wheel 20 and the outer circumference AU of the projection 13 with the outer diameter Touch D1 or lie on top of each other.

Es ist auch eine Ausführungsvariante (nicht gezeigt) möglich, wobei das ringförmige Antriebselement auf seinem Aussenumfang mit einer Verzahnung versehen ist, die im Eingriff mit einer Verzahnung der Ausgangswalze 7 steht, wobei das Antriebselement eine lichte Weite mit einer Innenfläche IF aufweist, die auf der ebenen Aussenfläche AU des Ansatzes 13 aufliegt, wie im Beispiel der Figur 2 gezeigt wird. D.h. die erste Getriebestufe weist in dieser Ausführung eine formschlüssige Antriebsverbindung auf, während die zweite Getriebestufe über einen Reibschluss erfolgt.It is also a variant (not shown) possible, wherein the annular drive element is provided on its outer circumference with a toothing in the Engaging with a toothing of the output roller 7, wherein the drive element has a clear width with an inner surface IF, which rests on the flat outer surface AU of the projection 13, as in the example of FIG. 2 will be shown. That is, the first gear stage has a positive drive connection in this embodiment, while the second gear stage takes place via a frictional engagement.

Wie aus Figur 2 zu entnehmen, ist im Bereich des ringförmigen Ansatzes 13 eine Abschlusskappe 21 befestigt, welche mit ihrem Aussendurchmesser die lichte Weite D2 des Reibrades 20 überragt. Die Abschlusskappe 21 ist dabei mit einem ringförmigen Ansatz 40 versehen, der in die lichte Weite des ringförmigen Ansatzes 13 der Saugtrommel 14 hineinragt. Die Aussenabmessung des ringförmigen Ansatzes 40 ist dabei so gewählt, dass er in der in Figur 2 gezeigten Lage eine Klemmwirkung innerhalb der lichten Weite des Ansatzes 13 ausübt. Wie schematisch dargestellt, kann der ringförmige Aufsatz 40 mit zusätzlichen nach aussen ragenden Nocken versehen sein, welche zur Fixierung der Abschlusskappe 21 in umlaufende Vertiefungen innerhalb der lichten Weite des Ansatzes 13 eingreifen. Durch die Abschlusskappe 21 wird das Reibrad 20 in axialer Richtung auf dem Ansatz 13 in seiner Position gehalten, wobei in Betriebsstellung zwischen der Stirnseite 35 der Saugtrommel 14 und dem Antriebselement 20 ein axialer Spalt besteht.How out FIG. 2 can be seen, in the region of the annular projection 13, a cover cap 21 is fixed, which projects beyond the inside diameter D2 of the friction wheel 20 with its outer diameter. The end cap 21 is provided with an annular projection 40 which projects into the inside width of the annular projection 13 of the suction drum 14. The outer dimension of the annular projection 40 is chosen so that it is in the in FIG. 2 shown position exerts a clamping action within the clear width of the neck 13. As shown schematically, the annular cap 40 may be provided with additional outwardly projecting cams, which engage for fixing the end cap 21 in circumferential recesses within the clear width of the projection 13. By the end cap 21, the friction wheel 20 is held in the axial direction on the neck 13 in its position, wherein in the operating position between the end face 35 of the suction drum 14 and the drive member 20, an axial gap.

Während des Verdichtungsvorgangs können sich einzelne Fasern vom zu verdichtenden Fasergut V lösen und am Umfang 38 der Saugtrommel 14 ablagern. Diese Fasern können sich in Richtung der Stirnseite 35 der Saugtrommel 14 fortbewegen und dabei in den axialen Spalt zwischen der Stirnseite 35 der Saugtrommel 14 und dem Reibrad 20 gelangen. Die Bewegung der Fasern kann z.B durch die Rotation der Saugtrommel 14 oder die bei der Rotation der Saugtrommel 14 entstehende Luftströmung erzeugt werden. Hierbei besteht die Gefahr, dass Fasern, die in den axialen Spalt gelangen, sich bis an den Aussenumfang AU des Ansatzes 13 fortbewegen und an diesem festsetzen. Dies hat zur Folge, dass die Innenfläche IF des Reibrades 20 nicht mehr in direktem Kontakt mit dem Aussenumfang AU des Ansatzes 13 steht, wodurch eine kontinuierliche Übertragung des Antriebsmoments vom Reibrad 20 auf die Saugtrommel 14 nicht mehr gewährleistet ist. Als Folge ändert sich das Geschwindigkeitsverhältnis zwischen der Saugtrommel 14 und der unteren Ausgangswalze 7 des Streckwerks 2. Hierdurch wird das zu verdichtende Fasergut V im Verdichtungsbereich SZ gestaucht, was sich negativ auf die Qualität der Verdichtung des Fasergutes V auswirkt. Es besteht daher die Notwendigkeit, das Reibrad 20 nach einer bestimmten Laufzeit der Verdichtungsvorrichtung VM von der Saugtrommel 14 zu entfernen und den Aussenumfang AU des Ansatzes 13 von den angesammelten Fasern zu befreien. Dies ist mit einem hohen Wartungsaufwand und hohen Stillstandzeiten der Spinnmaschine verbunden.During the compression process, individual fibers can be separated from the fiber material V to be compacted and deposited on the circumference 38 of the suction drum 14. These fibers can move in the direction of the end face 35 of the suction drum 14 and thereby reach into the axial gap between the end face 35 of the suction drum 14 and the friction wheel 20. The movement of the fibers can be generated, for example, by the rotation of the suction drum 14 or the air flow arising during the rotation of the suction drum 14. In this case, there is a risk that fibers that reach the axial gap, move up to the outer circumference AU of the neck 13 and attach to this. This has the consequence that the inner surface IF of the friction wheel 20 is no longer in direct contact with the outer circumference AU of the projection 13, whereby a continuous transmission of the drive torque from the friction wheel 20 to the suction drum 14 is no longer guaranteed. As a result, the speed ratio between changes As a result, the fiber material to be compacted V is compressed in the compression region SZ, which adversely affects the quality of the compression of the fiber material V. There is therefore a need to remove the friction wheel 20 after a certain period of the compacting device VM of the suction drum 14 and to free the outer circumference AU of the neck 13 of the accumulated fibers. This is associated with a high maintenance and high downtime of the spinning machine.

Aus Figur 2 ist zu entnehmen, dass auf der, am Träger 16 befestigten Welle 17 zwei Saugtrommeln 14 benachbarter Spinnstellen drehbar gelagert sind. Dabei sind die Saugtrommeln 14 mit einem jeweiligen Reibrad 20 spiegelbildlich in Bezug auf den Träger 16 angeordnet.Out FIG. 2 It can be seen that 17, two suction drums 14 of adjacent spinning stations are rotatably mounted on the, fixed to the carrier 16 shaft 17. The suction drums 14 are arranged with a respective friction wheel 20 in mirror image with respect to the carrier 16.

Im Anschluss an die Saugzone SZ ist für jede der Saugtrommeln 14 eine Klemmwalze 23 vorgesehen, die über eine Druckbelastung auf der jeweiligen Saugtrommel 14 aufliegt und mit dieser eine Klemmlinie P bildet. Dabei ist die jeweilige Klemmwalze 23 auf einer Achse 22 drehbar gelagert, welche an einem Lagerelement 25 befestigt ist, das über Schrauben 27 mit einem Federelement 26 verbunden ist. Das Federelement 26, über welches eine Anpresskraft der Klemmwalze 23 in Richtung der Saugtrommel 14 erzeugt wird, ist über die schematisch dargestellten Schrauben 27 am Träger 16 befestigt. Die Klemmlinie P bildet gleichzeitig einen so genannten "Drehsperrungsspalt", von welchem das Fasergut in der Förderrichtung FS in Form eines komprimierten Garnes FK unter Drehungserteilung einer schematisch gezeigten Ringspinneinrichtung 1 zugeführt wird.Subsequent to the suction zone SZ a pinch roller 23 is provided for each of the suction drums 14, which rests on a pressure load on the respective suction drum 14 and forms a nip line P with this. In this case, the respective pinch roller 23 is rotatably mounted on an axle 22 which is fixed to a bearing element 25 which is connected via screws 27 with a spring element 26. The spring element 26, via which a pressing force of the pinch roller 23 is generated in the direction of the suction drum 14, is fastened to the carrier 16 via the screws 27, which are shown schematically. The nip P at the same time forms a so-called "rotation blocking gap", from which the fiber material in the conveying direction FS in the form of a compressed yarn FK is supplied under rotation distribution of a ring spinning device 1 shown schematically.

Innerhalb des Trägers 16 verläuft ein Saugkanal SK, der eine Öffnung S2 auf der Innenfläche des Endstückes des Trägers 16 aufweist und eine weitere Öffnung S1, welche im Bereich der Aufnahme 19 angeordnet ist und mit dem Innenraum 29 des jeweiligen Saugeinsatzes 15 in Verbindung steht. Die Öffnung S2 steht in der Arbeitsposition einer Öffnung SR des Saugrohres 41 gegenüber, wodurch der Innenraum des Saugrohres 41 mit dem Saugkanal SK verbunden ist. Wie aus Figur 1 zu entnehmen, ist das Saugrohr 41 über ein oder mehrere Verbindungskanäle 42 mit einem zentralen Hauptkanal 43 verbunden. Dieser Kanal 43 steht mit einer Unterdruckquelle SP in Verbindung, welche über eine Steuereinheit ST angesteuert werden kann.Within the carrier 16 extends a suction channel SK, which has an opening S2 on the inner surface of the end piece of the carrier 16 and a further opening S1, which is arranged in the region of the receptacle 19 and communicates with the interior 29 of the respective suction insert 15. The opening S2 is in the working position of an opening SR of the suction pipe 41 opposite, whereby the interior of the suction pipe 41 is connected to the suction channel SK. How out FIG. 1 can be seen, the suction pipe 41 via one or more connecting channels 42 with a central main channel 43rd connected. This channel 43 is connected to a vacuum source SP in connection, which can be controlled via a control unit ST.

Um bei einem Fadenbruch zwischen der Klemmlinie P und der Spule 33 das weiterhin über den Klemmpunkt P gelieferte Garn FK absaugen zu können, ist beidseitig des Trägers 16 jeweils ein Absaugrohr 30 befestigt, deren jeweilige Öffnung 31, welche dem Träger 16 zugewandt ist, mit dem Kanal SK verbunden ist. Das vom Träger16 ausgesehen nach aussen ragende Ende des jeweiligen Absaugrohres 30 ist geschlossen. Auf einem Teilbereich des Umfanges des jeweiligen Absaugrohres 30 ist eine Öffnung 32 angebracht, welche in Richtung des nach unten abgezogenen Garnes FK zeigt. D. h. bei einem auftretenden Fadenbruch wird das Ende des weiterhin gelieferten Fadens, bzw. Garnes, über das jeweilige Absaugrohr 30 unter der Einwirkung des über die Unterdruckquelle SP erzeugten Unterdrucks über den Saugkanal SK dem Absaugrohr 30 zugeführt, welcher diesen über den oder die Kanäle 42 zur weiteren Abführung an eine Sammelstelle an den Hauptkanal 43 abgibt.In order to be able to extract the yarn FK delivered further via the clamping point P in the event of a yarn break between the nip line P and the bobbin 33, a suction pipe 30 is fastened on both sides of the support 16, whose respective opening 31, which faces the support 16, is fastened to the Channel SK is connected. The end of the respective suction tube 30 projecting outwards from the support 16 is closed. On a portion of the circumference of the respective suction pipe 30, an opening 32 is mounted, which points in the direction of the pulled-down yarn FK. Ie. in the event of yarn breakage, the end of the further supplied yarn, or yarn, is supplied via the respective suction tube 30 under the action of the negative pressure generated via the vacuum source SP via the suction channel SK to the suction tube 30, which this via the channels or 42 for further Transfer to a collection point to the main channel 43 outputs.

In Figur 3 ist eine vergrösserte Teilansicht Y nach Fig. 2 eines Ausführungsbeispiels einer erfindungsgemässen Saugtrommel 14 mit Antriebselement 20 abgebildet. Die Saugtrommel 14 weist an ihrer Stirnseite 35 eine ringförmige Erhöhung 36 auf. Die Erhöhung 36 verläuft koaxial zum Ansatz 13 der Saugtrommel 14 und ist von der Drehachse (A1) gesehen in einem radialen Abstand zum Aussenumfang AU des Ansatzes 13 angeordnet. Die Erhöhung 36 weist eine Höhe H von 1-5mm auf. Die Höhe H erstreckt sich dabei in axialer Richtung zur Saugtrommel 14. Umgekehrt hat das Antriebselement 20 an seiner zur Stirnseite 35 der Saugtrommel 14 gerichteten Stirnseite 46 eine ringförmige Vertiefung 37, in welche die Erhöhung 36 hineinragt. Die Erhöhung 36 und die Vertiefung 37 wirken dabei derart zusammen, dass die in axialer und radialer Richtung einander gegenüberliegenden Dichtungsflächen einen engen Dichtspalt DS bilden. Der Dichtspalt DS (Labyrinthdichtung) wirkt als Barriere gegen Fasern, die sich während des Verdichtungsvorgangs vom zu verdichtenden Fasergut V abgelöst haben und in den axialen Spalt A zwischen der Stirnseite 35 der Saugtrommel 14 und der Stirnseite 46 des Antriebselement 20 gelangt sind. Die Fasern prallen im axialen Spalt A gegen die Erhöhung 36 und werden dadurch abgebremst. Aufgrund der labyrinthartigen Dichtung wird den Fasern ein Richtungswechsel auf erzwungen, durch welchen ein Passieren des Dichtspalts DS erschwert wird.In FIG. 3 is an enlarged partial view Y after Fig. 2 an embodiment of an inventive suction drum 14 with drive element 20 shown. The suction drum 14 has on its end face 35 on an annular elevation 36. The elevation 36 runs coaxially with the projection 13 of the suction drum 14 and is arranged at a radial distance from the axis of rotation (A1) to the outer circumference AU of the projection 13. The elevation 36 has a height H of 1-5mm. The height H extends in the axial direction to the suction drum 14. Conversely, the drive element 20 has on its end face 35 of the suction drum 14 directed end face 46 an annular recess 37, into which the elevation 36 protrudes. The elevation 36 and the depression 37 act together in such a way that the sealing surfaces lying opposite one another in the axial and radial directions form a narrow sealing gap DS. The sealing gap DS (labyrinth seal) acts as a barrier against fibers which have detached during the compression process from the fiber material to be compacted V and in the axial gap A between the end face 35 of the suction drum 14 and the end face 46 of the drive element 20 passes. The fibers bounce in the axial gap A against the elevation 36 and are thereby braked. Due to the labyrinthine Seal the fibers is forced to change direction by which a passing of the sealing gap DS is made difficult.

Im Unterschied zum Stand der Technik (Fig. 2) gelingt es durch das Zusammenwirken der ringförmigen Erhöhung 36 und der ringförmigen Vertiefung 37, den Faserfluss im axialen Spalt A zu kontrollieren. Bei einem grösseren Spalt A, z.B von 0.5mm, können sich im Spalt A befindende Fasern, auch wieder nach Aussen in Richtung zur Umfangsfläche 38 der Saugtrommel 14 bewegen. Es wird somit vermieden, dass Fasern bis an den Aussenumfang AU des Ansatzes 13 gelangen und sich dort ablagern. Hierdurch ist gewährleistet, dass während des Betriebs der Verdichtungsvorrichtung VM die Innenfläche IF des Antriebselements 20 in direktem Kontakt mit dem Aussenumfang AU des Ansatzes 13 steht. Eine kontinuierliche Übertragung des Antriebsmoments vom Antriebselement 20 auf die Saugtrommel 14 ist somit sichergestellt. Im Unterschied zum Stand der Technik kann die Verdichtungsvorrichtung VM dadurch ohne grösseren Wartungsaufwand betrieben werden.In contrast to the prior art ( Fig. 2 ) it is possible by the interaction of the annular elevation 36 and the annular recess 37 to control the fiber flow in the axial gap A. With a larger gap A, for example of 0.5 mm, fibers located in the gap A can also move outwards in the direction of the circumferential surface 38 of the suction drum 14. It is thus avoided that fibers reach the outer circumference AU of the projection 13 and deposit there. This ensures that the inner surface IF of the drive element 20 is in direct contact with the outer circumference AU of the projection 13 during operation of the compacting device VM. A continuous transmission of the drive torque from the drive element 20 to the suction drum 14 is thus ensured. In contrast to the prior art, the compacting device VM can thereby be operated without major maintenance.

Die Saugtrommel 14 weist eine eloxierte Beschichtung auf und ist mit auf ihrem Umfang verlaufenden Perforationen, bzw. Öffnungen Ö versehen. Die Öffnungen Ö bilden ein einreihiges Lochbild. Im Innenraum 28 der Saugtrommel 14 ist ein stationär gelagerter Saugeinsatz 15 angeordnet, welcher auf einem Teilbereich seines Umfanges einen Saugschlitz S aufweist. Der Saugeinsatz 15 ist über nicht näher gezeigte Haltemittel an einem Träger 16 (Fig.2) in seiner eingebauten stationären Lage gehalten. Die Saugtrommel 14 ist im Bereich ihres äusseren Endes über ein Lager K auf einer Welle 17 drehbar gelagert, wobei das Lager K an einem Anschlag 34 der Saugtrommel 14 anliegt und vom äusseren Ende der Saugtrommel 14 montiert ist. Zur axialen Fixierung der Saugtrommel 14 auf der Welle 17 ist auf der Welle 17 ein Sicherungsring 18 angebracht, der das axiale Verschieben der Saugtrommel 14 während des Betriebes unterbindet. Auch ist es möglich, dass die Saugtrommel 14 drehfest auf der Welle 17 befestigt ist und die Welle 17 drehbar gelagert ist.The suction drum 14 has an anodized coating and is provided with running on its circumference perforations, or openings Ö. The openings Ö form a single-row hole pattern. In the interior 28 of the suction drum 14, a stationary mounted suction insert 15 is arranged, which has a suction slot S on a portion of its circumference. The absorbent insert 15 is not shown in detail holding means on a support 16 (FIG. Fig.2 ) held in its installed stationary position. The suction drum 14 is rotatably mounted in the region of its outer end via a bearing K on a shaft 17, wherein the bearing K abuts against a stop 34 of the suction drum 14 and is mounted from the outer end of the suction drum 14. For axial fixation of the suction drum 14 on the shaft 17, a locking ring 18 is mounted on the shaft 17, which prevents the axial displacement of the suction drum 14 during operation. It is also possible that the suction drum 14 is rotatably mounted on the shaft 17 and the shaft 17 is rotatably mounted.

Im Bereich des ringförmigen Ansatzes 13 ist eine transparente Abschlusskappe 21 befestigt, welche mit ihrem Aussendurchmesser die lichte Weite D2 des Reibrades 20 überragt. Die Abschlusskappe 21 ist dabei mit einem ringförmigen Ansatz 40 versehen, der in die lichte Weite des ringförmigen Ansatzes 13 der Saugtrommel 14 hineinragt. Der ringförmige Aufsatz 40 ist mit zusätzlichen nach aussen ragenden Nocken versehen, welche zur Fixierung der Abschlusskappe 21 in umlaufende Vertiefungen innerhalb der lichten Weite des Ansatzes 13 eingreifen.In the region of the annular projection 13, a transparent end cap 21 is fixed, which with its outer diameter, the clear width D2 of the friction wheel 20th surmounted. The end cap 21 is provided with an annular projection 40 which projects into the inside width of the annular projection 13 of the suction drum 14. The annular top 40 is provided with additional outwardly projecting cams, which engage in the circumferential width of the neck 13 for fixing the end cap 21 in circumferential recesses.

In Figur 4 ist eine weitere Ausführungsform einer erfindungsgemässen Saugtrommel 14 mit Antriebselement 20 dargestellt. Die Saugtrommel 14 ist dabei wie im vorherigen Ausführungsbeispiel (Fig.3) im Bereich ihres äusseren Endes über ein Lager K auf einer Welle 17 gelagert. Zur axialen Fixierung der Saugtrommel 14 auf der Welle 17 ist auf der Welle 17 ein Sicherungsring 18 angebracht, der das axiale Verschieben der Saugtrommel 14 während des Betriebes unterbindet. Die Saugtrommel 14 ist mit auf ihrem Umfang 38 verlaufenden Perforationen, bzw. Öffnungen Ö versehen. Im Innenraum 28 der Saugtrommel 14 ist ein stationär gelagerter Saugeinsatz 15 angeordnet, welcher auf einem Teilbereich seines Umfanges einen Saugschlitz S aufweist. Der Saugeinsatz 15 ist über nicht näher gezeigte Haltemittel an einem Träger 16 (Fig.2) in seiner eingebauten stationären Lage gehalten.In FIG. 4 a further embodiment of a suction drum 14 according to the invention with drive element 20 is shown. The suction drum 14 is as in the previous embodiment ( Figure 3 ) is mounted on a shaft 17 in the region of its outer end via a bearing K. For axial fixation of the suction drum 14 on the shaft 17, a locking ring 18 is mounted on the shaft 17, which prevents the axial displacement of the suction drum 14 during operation. The suction drum 14 is provided with running on its circumference 38 perforations, or openings Ö. In the interior 28 of the suction drum 14, a stationary mounted suction insert 15 is arranged, which has a suction slot S on a portion of its circumference. The absorbent insert 15 is not shown in detail holding means on a support 16 (FIG. Fig.2 ) held in its installed stationary position.

Im Unterschied zum Ausführungsbeispiel in Fig.3 weist die Saugtrommel 14 zwischen dem Aussenumfang AU des Ansatzes 13 und der Stirnseite 35 der Saugtrommel 14 einen stufenförmigen Absatz 36 auf. Die von der Drehachse A1 radial nach aussen gerichtete Fläche 39 des Absatzes 36 ist dabei konusförmig ausgeführt, so dass der Aussendurchmesser DE (Fig.5) des Absatzes 36 zur Stirnseite 35 der Saugtrommel 14 hin stetig abnimmt. Das Reibrad 20 ist rotationssymmetrisch ausgebildet und weist an seinen beiden Seiten eine ringförmige Nut 37,45 auf, welche sich von der Innenfläche IF des Reibrads 20 radial nach aussen erstreckt. Die Nut 37, 45 ist passend zur Aufnahme des Absatzes 36 ausgebildet. Durch die rotationssymmetrische Ausbildung des Reibrads 20 wird eine Fehlmontage des Reibrads 20 vermiedenIn contrast to the embodiment in Figure 3 the suction drum 14 between the outer circumference AU of the projection 13 and the end face 35 of the suction drum 14 has a stepped shoulder 36. The surface 39 of the shoulder 36 directed radially outward from the axis of rotation A1 is designed to be conical, so that the external diameter DE (FIG. Figure 5 ) of paragraph 36 to the end face 35 of the suction drum 14 towards steadily decreases. The friction wheel 20 is rotationally symmetrical and has on its two sides an annular groove 37,45 which extends radially outwardly from the inner surface IF of the friction wheel 20. The groove 37, 45 is adapted to receive the shoulder 36. Due to the rotationally symmetrical design of the friction wheel 20 incorrect assembly of the friction wheel 20 is avoided

Im Bereich des ringförmigen Ansatzes 13 ist eine Abschlusskappe 21 befestigt, die mit ihrem Aussendurchmesser in die Nut 45 des Reibrades 20 hineinragt. Wie auch im Ausführungsbeispiel in Fig. 3 ist die Abschlusskappe 21 mit einem ringförmigen Ansatz 40 versehen, der in die lichte Weite des ringförmigen Ansatzes 13 der Saugtrommel 14 hineinragt. Durch die Abschlusskappe 21 wird das Reibrad 20 in axialer Richtung auf dem ringförmigen Ansatz 13 in seiner Position gehalten, wobei sich in Betriebsstellung ausserhalb des Absatzes und der Vertiefung ein axialer Spalt A bildet. Der axiale Spalt A beträgt zwischen 0.1-0.5mm. Im Bereich der Dichtung, wo der Absatz 36 und die Nut 37 zusammenwirken, stellt sich ein enger Dichtspalt DS ein. Durch den Dichtspalt DS wird verhindert, dass sich Fasern, die vom Umfang 38 der Saugtrommel 14 in den Spalt A gelangen, bis an den Aussenumfang AU des Ansatzes 13 fortbewegen und dort absetzen.In the region of the annular projection 13, a cover cap 21 is fixed, which protrudes with its outer diameter into the groove 45 of the friction wheel 20. As in the embodiment in Fig. 3 is the end cap 21 with an annular projection 40th provided, which projects into the clear width of the annular projection 13 of the suction drum 14. By the end cap 21, the friction wheel 20 is held in the axial direction on the annular projection 13 in its position, with an axial gap A forms in the operating position outside the heel and the recess. The axial gap A is between 0.1-0.5mm. In the region of the seal, where the shoulder 36 and the groove 37 cooperate, a narrow sealing gap DS sets. The sealing gap DS prevents fibers which pass from the periphery 38 of the suction drum 14 into the gap A to move to the outer circumference AU of the projection 13 and settle there.

In Figur 5 (Ansicht Z von Fig.4) ist der Absatz 36 der Saugtrommel 14 vergrössert dargestellt. Die von der Drehachse A1 radial nach aussen gerichtete Fläche 39 des Absatzes 36 ist unter einem Winkel b von 5-45° zur Drehachse A1 angeordnet und zwar derart, dass der Aussendurchmesser DE des Absatzes 36 zur Stirnseite 35 der Saugtrommel 14 hin stetig abnimmt. Durch die zackenförmige Ausgestaltung des Absatzes 36 entsteht zwischen der Fläche 39 des Absatzes 36 und der Stirnseite 35 der Saugtrommel 14 eine Vertiefung 44. In der Vertiefung 44 können sich Fasern absetzen, die vom Umfang 38 der Saugtrommel 14 in den Spalt A (Fig.4) gelangen. Aufgrund der Vertiefung 44 kann verhindert werden, dass Fasern sich bis in den Bereich des Aussenumfanges AU des Ansatzes 13 fortbewegen. Der maximale Aussendurchmesser DE des Absatzes 36 beträgt zwischen 50-75% des Aussendurchmessers DS der Saugtrommel 14 (DE=0.5-0.75 DS). Die Höhe H des Absatzes 36 beträgt zwischen 1-5mm.In FIG. 5 (View Z from Figure 4 ), the shoulder 36 of the suction drum 14 is shown enlarged. The radially outwardly directed surface 39 of the shoulder 36 from the axis of rotation A1 is arranged at an angle b of 5-45 ° to the axis of rotation A1, in such a way that the outer diameter DE of the shoulder 36 decreases steadily towards the end face 35 of the suction drum 14. By the serrated configuration of the shoulder 36 is formed between the surface 39 of the shoulder 36 and the end face 35 of the suction drum 14 has a recess 44. In the recess 44, fibers can settle, from the periphery 38 of the suction drum 14 in the gap A (FIG. Figure 4 ) reach. Due to the depression 44, fibers can be prevented from moving into the region of the outer circumference AU of the projection 13. The maximum outer diameter DE of paragraph 36 is between 50-75% of the outer diameter DS of the suction drum 14 (DE = 0.5-0.75 DS). The height H of paragraph 36 is between 1-5mm.

Claims (9)

  1. A device (VM) for compacting a fiber material (V) on a spinning machine with a rotatably supported suction drum (14) and an annular drive element (20) which, in the operating position, rests via a portion of its inner surface (IF) on a portion of a circular peripheral surface (AU) of a projection (13) which extends coaxial to an axis of rotation (A1) of the suction drum (14) and is mounted on an end face (35) of the suction drum (14), and a gap (A) between the end face (35) of the suction drum (14) and side (46) the drive element (20) directed towards the end face (35), characterized in that the suction drum (14), on the end face (35) having the projection (13), comprises at least one peripheral elevation (36) and the drive element (20) on the side (46) directed toward the end face (35) of the suction drum (14) comprises at least one peripheral recess (37), wherein the at least one elevation (36) protrudes into the at least one recess (37) and the elevation (36) and the recess (37) together form a labyrinth seal, so that the gap (A) functions as a barrier against fibers that move in the direction of the circular peripheral circumference (AU) of the projection (13) of the suction drum (14).
  2. The device (VM) according to claim 1, characterized in that at the end face (35) of the suction drum (14) multiple peripheral elevations (36) are disposed and the drive element (20) has on the side (46) directed toward the end face (35) of the suction drum (14) therefore has multiple peripheral recesses (37), into which recesses the elevations (36) engage.
  3. The device (VW) according to claim 1 or 2, characterized in that the at least one elevation (36) of the suction drum (14) has a height (H) of 1-5mm.
  4. The device (VW) according to one of the claims 1 to 3, characterized in that, outside of the elevation (36) and the recess (37), the end faces (35, 46) of the suction drum (14) and the drive element (20) have a spacing (A) of 0.1-0.5mm.
  5. The device (VW) according to any one of claims 1 to 4, characterized in that the at least one elevation (36) has a step-shaped projection between the peripheral surface (AU) of the projection (13) and the end face (35) of the suction drum (14).
  6. The device (VW) according to claim 5, characterized in that the drive element (29) has on both sides an annular groove (37, 45), which extends radially outward from the inner surface (IF) of the drive element (20) and which is designed to match the receptacle of the projection (36).
  7. The device (VW) according to claim 5 or 6, characterized in that the surface (39) of the projection (36) directed radially outward from the axis of rotation (A1) is disposed at an angle (b) of 5-45° with respect to the axis of rotation (A1), and the outer diameter (DE) of the projection (36) constantly decreases toward the end face (35) of the suction drum (14).
  8. The device (VW) according to any one of claims 1 to 7, characterized in that the drive element (20) is rotationally symmetrical.
  9. A spinning machine comprising a device (VM) for compacting a fiber material (V) according to any of the claims 1 to 8.
EP14777148.9A 2013-09-13 2014-09-01 Suction drum having a seal Active EP3044355B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01572/13A CH708518A1 (en) 2013-09-13 2013-09-13 Suction drum of a device for compressing a fiber material with a seal.
PCT/IB2014/001657 WO2015036821A1 (en) 2013-09-13 2014-09-01 Suction drum having a seal

Publications (2)

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EP3044355A1 EP3044355A1 (en) 2016-07-20
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EP14777148.9A Active EP3044355B1 (en) 2013-09-13 2014-09-01 Suction drum having a seal

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US (1) US10132011B2 (en)
EP (1) EP3044355B1 (en)
JP (1) JP6479018B2 (en)
CN (1) CN205662643U (en)
CH (1) CH708518A1 (en)
TR (1) TR201901714T4 (en)
WO (1) WO2015036821A1 (en)

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CH709312A1 (en) * 2014-02-27 2015-08-28 Rieter Ag Maschf Compacting device with suction drum.
CH711549A1 (en) * 2015-09-18 2017-03-31 Rieter Ag Maschf Cleaning device for a compacting device.
US11129906B1 (en) 2016-12-07 2021-09-28 David Gordon Bermudes Chimeric protein toxins for expression by therapeutic bacteria
USD1010028S1 (en) 2017-06-22 2024-01-02 Boost Treadmills, LLC Unweighting exercise treadmill
DE102019115218A1 (en) * 2019-06-05 2020-12-10 Maschinenfabrik Rieter Ag Compaction device for a drafting system of a spinning machine and spinning machine
US11872433B2 (en) 2020-12-01 2024-01-16 Boost Treadmills, LLC Unweighting enclosure, system and method for an exercise device
US11883713B2 (en) 2021-10-12 2024-01-30 Boost Treadmills, LLC DAP system control and related devices and methods

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Also Published As

Publication number Publication date
EP3044355A1 (en) 2016-07-20
US10132011B2 (en) 2018-11-20
JP6479018B2 (en) 2019-03-06
TR201901714T4 (en) 2019-03-21
US20160222553A1 (en) 2016-08-04
CN205662643U (en) 2016-10-26
JP2016534249A (en) 2016-11-04
WO2015036821A1 (en) 2015-03-19
CH708518A1 (en) 2015-03-13

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