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EP2551388A2 - Compaction sensor for a spinning machine - Google Patents

Compaction sensor for a spinning machine Download PDF

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Publication number
EP2551388A2
EP2551388A2 EP12004341A EP12004341A EP2551388A2 EP 2551388 A2 EP2551388 A2 EP 2551388A2 EP 12004341 A EP12004341 A EP 12004341A EP 12004341 A EP12004341 A EP 12004341A EP 2551388 A2 EP2551388 A2 EP 2551388A2
Authority
EP
European Patent Office
Prior art keywords
support tube
suction
section
region
suction device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12004341A
Other languages
German (de)
French (fr)
Other versions
EP2551388B1 (en
EP2551388A3 (en
Inventor
Gabriel Schneider
Robert Nägeli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
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Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP2551388A2 publication Critical patent/EP2551388A2/en
Publication of EP2551388A3 publication Critical patent/EP2551388A3/en
Application granted granted Critical
Publication of EP2551388B1 publication Critical patent/EP2551388B1/en
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Classifications

    • 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 suction device for the compressed air of at least one suction unit for the aerodynamic compression of a fiber material according to the preamble of claim 1.
  • a device wherein the suction element in the region of the bearing point "floating" is mounted to compensate for tolerances between a stationary mounted, a support tube exhibiting suction and a subsequent, attached to the machine frame bearing point.
  • the suction element is in communication with compression elements (suction units).
  • compression elements suction units.
  • the tolerances occurring are compensated by the use of an elastic bearing.
  • a rubber-elastic bearing part is proposed, over which massive deviations in the position to each other (in particular in the longitudinal direction of the spinning machine) are compensated between the suction element and the bearing.
  • the invention thus has the object of eliminating the disadvantages of known solutions wherein the requirement for compensation of tolerances in the dimensional positioning between a stationary suction unit and a subsequent bearing point for a support tube connected to the suction unit is still guaranteed.
  • the support tube is designed in two parts and, which opens into the bearing element second portion of the support tube on which, fixedly connected to the suction member first portion of the support tube is pivotally mounted in a horizontal plane about a pivot axis.
  • the compensation of tolerances within the positioning can be done directly over the pivot axis of the two-part support tube and a long rubber-elastic guide in the bearing part can be omitted. That is, the guide surfaces, over which the air is guided within the suction can be performed as smooth and non-adherent surfaces, whereby an adhesion of fibers is avoided within the suction device.
  • the first section of the support tube protrudes with its free end into the second section of the support tube in the region of the pivotable attachment, thus creating an overlap between the end of the first and second sections of the support tube and the first and second sections of the support tube have an elliptical cross-section in the region of the overlap.
  • a horizontal mobility of the pivot point can be done by the elliptical cross-section.
  • first portion of the support tube in the region of the overlap on the upper and lower outer surface each having a vertically oriented axis which for pivotally mounting the second portion of the support tube in, attached to the end and aligned in the direction of the first portion of the support tube Protruding unilaterally open recesses. This also allows for easy assembly and disassembly of the two-part support tube.
  • the first section of the support tube in the region of the overlap with the second section of the support tube is provided with a circumferential seal on the outer circumference.
  • the seal consists of a, on the outer circumference of the first portion of the support tube circumferential sealing lip, which is integrally connected to the first portion of the support tube. This ensures a cost-effective production and at the same time an optimal and secure seal in the area of this pivot point.
  • FIG. 1 shows a schematic side view of a spinning station 1 a spinning machine (ring spinning machine) with one of two adjacent drafting units 2 of a cylinder drafting 2z.
  • the drafting units 2 are each provided with an input roller pair 3, a middle roller pair 4 and a pair of output rollers 5.
  • To each of the center rollers of the middle roller pair a strap is guided, which are each held around a cage not shown in detail in its illustrated position.
  • the upper rollers of said pairs of rollers 3 to 5 are designed as pressure rollers which are rotatably mounted on the axes of a pivotally mounted pressure arm (not shown).
  • the lower rollers of the roller pairs 3, 4, 5 are connected to a drive, not shown.
  • individual drives, as well as other forms of drive can be used.
  • the peripheral speed of the roller pairs 4 is slightly higher than the peripheral speed of the roller pairs 3, so that the, the drafting unit 2 supplied fiber in the form of a sliver L between the pair of input rollers 3 and the middle roller pair 4 is subjected to a pre-delay.
  • the main distortion of the fiber material L is formed between the middle roller pair 4 and the output roller pair 5, the output roller pair 5 having a substantially higher peripheral speed than the middle roller pair 4.
  • the output roller pair 5 is equipped in the present example with a compression device VV.
  • the compression device VV consists of a suction drum 6, which is driven via an axis 8.
  • the suction drum 6 is associated with a pressure roller 9, which forms with her a nip P1.
  • a pinch roller 7 also called a rotation locking roller
  • a pinch roller 7 is mounted, which rests on the circumference of the suction roller 6 (or 6a) and together with this forms a nip P ( Fig.1 ).
  • a suction zone Z in which the fiber material V discharged from the clamping point P1 is compressed by the action of a suction air. This compaction process is well known and has already been described in previous publications. It is therefore not discussed here in detail. Above the suction zone, a cover 13 is attached, which serves to guide the air during the compression process.
  • the compressed yarn G delivered downwards via the clamping point P on the pinch roller 7 is fed via a yarn guide 43 to a ring spinning device shown schematically.
  • This is provided with a ring 39 and a rotor 40, wherein the yarn G is wound onto a sleeve 41 to form a coil 42 (Kops).
  • the ring 39 is attached to a ring frame 44 which performs an up and down movement during the spinning process.
  • suction units 10, 10a are arranged within the suction drums, which in particular from the enlarged view X (after FIG. 1 ) in FIG. 2 can be seen.
  • the suction unit 10 of the suction drum 6 has a suction slot (suction opening) 11, which faces the area on the inside of the suction drum 6, in which the openings OE are arranged on the circumference of the suction drum 6.
  • the suction slot 11 is connected to a suction channel 12 mounted inside the suction unit 10, which opens into an outlet opening O1 of a flange F1, which is attached to the suction unit 10.
  • a further suction drum 6a is mounted on the shaft 8, in which a suction unit 10a mounted in mirror image with respect to the suction unit 10 is provided.
  • the suction unit 10a also has a suction slot 11, which opens into a suction channel 12.
  • the outlet opening 02 of the suction channel 12 is located in a flange F2, which is connected to the suction unit 10a. Since the suction units are substantially the same (except for the mirror-image embodiment), the same reference numerals have been used in part.
  • the outlet openings O1, O2 of the respective flanges F1, F2 face an inlet opening O of a support tube 22, which is fastened to a suction element 15.
  • the flap 17 has a latch 28, which in the in FIG. 1 shown closed position engages in a recess not shown in detail a guide 16, which is attached to the suction element 15.
  • the support tube 22 consists of a, fixedly connected to the suction member 15 first portion 23 on which in the region of a cover Ü a second portion 24 of the support tube is pivotally mounted.
  • the second portion 24 can be pivoted about an approximately vertically oriented pivot axis 25 in a horizontal plane E.
  • the free end S1 of the first pipe section 23 and the end S2 of the second pipe section 24 each have an elliptical cross section Q, Q1 on, such. B. from the sectional view AA (according to FIG. 3 ) from the FIG. 3a can be seen.
  • a circumferential seal D At a small distance s to the end of the pipe section 23 extends a circumferential seal D at a constant distance.
  • the seal D is arranged between the outer circumference D1 of the pipe section 23 and the inner circumference D2 of the pipe section 24.
  • At the end S1 of the pipe section 23 is centrally and opposite each mounted a pivot axis 25, via which via a recess 27, the end S2 of the pipe section 24 is pushed.
  • the recess 27 is dimensioned so that an automatic release from the assembled position shown is not possible.
  • the end S1 of the pipe section 23, in the radial direction to the pivot axis 25, provided with a radius R1.
  • the pipe section 23 tapers in the region of the pivoting plane E toward the end by the radius R1.
  • the end S2 of the pipe section 24 is provided in the region of the cover Ü with an inner circumference D2, which tapers in the pivoting plane E by the radius R2.
  • the second end S2 of the pipe section 24 of the support tube 22 is provided with a circular cross-section and with a flange 32 which engages in the locking position in a recess 33 of a bearing element 30.
  • this bearing element 30 is Also mounted another tube 34, the other end via a coupling 35 opens into a central suction channel 37, which is connected to a vacuum source UP.
  • a semicircular insertion EF is provided, which has a tapering in the direction of the bearing element 30 conical inner surface.
  • the bearing element 30, which is usually formed as an elastic rubber element, has a circumferential groove 36, via which it is attached to a machine frame MR.
  • the distance m between the end S3 of the pipe section 24 and the subsequent pipe 34 can now be kept to a minimum, especially since the use of a split suction pipe 22 no tolerance compensation must be made in the region of the bearing element. This ensures that the fiber material entrained with the suction air is guided essentially over non-adhering, smooth inner surfaces of the suction device. As a result, on the one hand reduces the risk of contamination within the extraction system and on the other hand generates an extension of the maintenance intervals.

Landscapes

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

Abstract

The apparatus has circulating compression elements i.e. suction drums (6, 6a), guided over a compression zone. A suction element (15) is directly or indirectly connected to a suction channel (12) of suction units (10, 10a) at an end (E1) such that the suction units is held by a holding unit i.e. flap (17). A supporting tube (22) is rigidly connected at another end (E2) of the suction element. A portion (24) of the tube is pivotally mounted at another portion (23) of the tube in a horizontal plane around a pivotal axis (25), where the latter portion is fixedly connected to the suction element.

Description

Die Erfindung bezieht sich auf eine Absaugvorrichtung für die Verdichtungsluft von wenigstens einer Saugeinheit zur aerodynamischen Verdichtung eines Fasergutes nach dem Oberbegriff des Patentanspruches 1.The invention relates to a suction device for the compressed air of at least one suction unit for the aerodynamic compression of a fiber material according to the preamble of claim 1.

Aus der DE 101 45 444 A1 ist eine Vorrichtung bekannt, wobei zum Ausgleich von Toleranzen zwischen einem stationär angebrachten, ein Tragrohr aufweisendes Saugelement und einer nachfolgenden, am Maschinengestell angebrachten Lagerstelle, das Saugelement im Bereich der Lagerstelle "schwimmend" angebracht ist. Das Saugelement steht dabei mit Verdichtungselementen (Saugeinheiten) in Verbindung. Bei der gezeigten Lösung werden die auftretenden Toleranzen (durch Fertigung, Erwärmung der Maschine im Betrieb, usw.) durch den Einsatz einer elastischen Lagerung ausgeglichen. Dabei wird ein gummielastisches Lagerteil vorgeschlagen, über welches masslichen Abweichungen in der Position zueinander (insbesondere in Längsrichtung der Spinnmaschine) zwischen dem Saugelement und der Lagerstelle ausgeglichen werden. Als nachteilig in der Verwendung von solchen gummielastischen Teilen hat sich herausgestellt, dass sich Faserteile, welche mit der Luftströmung mitgeführt werden, an den Innenflächen dieser Teile anhaften können. Damit wird die Verschmutzungsgefahr an diesen Stellen erheblich erhöht. Das führt dazu, dass diese kritischen Stellen öfters gereinigt werden müssen, um Störungen an den Verdichtungsstellen durch einen zu geringen Unterdruck zu vermeiden.From the DE 101 45 444 A1 a device is known, wherein the suction element in the region of the bearing point "floating" is mounted to compensate for tolerances between a stationary mounted, a support tube exhibiting suction and a subsequent, attached to the machine frame bearing point. The suction element is in communication with compression elements (suction units). In the solution shown, the tolerances occurring (by manufacturing, heating of the machine during operation, etc.) are compensated by the use of an elastic bearing. In this case, a rubber-elastic bearing part is proposed, over which massive deviations in the position to each other (in particular in the longitudinal direction of the spinning machine) are compensated between the suction element and the bearing. A disadvantage in the use of such rubber-elastic parts has been found that fiber parts, which are carried along with the air flow, can adhere to the inner surfaces of these parts. This considerably increases the risk of contamination at these points. As a result, these critical points must be cleaned more often to avoid disturbances at the compression points by too low a vacuum.

Der Erfindung stellt sich somit die Aufgabe die Nachteile bekannter Lösungen zu beseitigen wobei die Forderung zum Ausgleich von Toleranzen in der masslichen Positionierung zwischen einer stationären Saugeinheit und einer nachfolgenden Lagerstelle für ein mit der Saugeinheit verbundenes Tragrohr nach wie vor gewährleistet wird.The invention thus has the object of eliminating the disadvantages of known solutions wherein the requirement for compensation of tolerances in the dimensional positioning between a stationary suction unit and a subsequent bearing point for a support tube connected to the suction unit is still guaranteed.

Diese Aufgabe wird dadurch gelöst, indem vorgeschlagen wird, dass das Tragrohr zweigeteilt ausgeführt ist und der, in das Lagerelement mündende zweite Abschnitt des Tragrohres an dem, fest mit dem Saugelement verbundenen ersten Abschnitt des Tragrohres in einer horizontalen Ebene um eine Schwenkachse schwenkbar befestigt ist.This object is achieved by proposing that the support tube is designed in two parts and, which opens into the bearing element second portion of the support tube on which, fixedly connected to the suction member first portion of the support tube is pivotally mounted in a horizontal plane about a pivot axis.

Damit kann der Ausgleich der Toleranzen innerhalb der Positionierung direkt über die Schwenkachse des zweigeteilten Tragrohres erfolgen und auf eine lange gummielastische Führung im Lagerteil kann verzichtet werden. Das heisst die Führungsflächen, über welche die Luft innerhalb der Absaugung geführt wird, kann als glatte und Faserhaftfreie Flächen ausgeführt werden, wodurch eine Anhaftung von Fasern innerhalb der Absaugvorrichtung vermieden wird.Thus, the compensation of tolerances within the positioning can be done directly over the pivot axis of the two-part support tube and a long rubber-elastic guide in the bearing part can be omitted. That is, the guide surfaces, over which the air is guided within the suction can be performed as smooth and non-adherent surfaces, whereby an adhesion of fibers is avoided within the suction device.

Des Weiteren wird vorgeschlagen, dass der erste Abschnitt des Tragrohres mit seinem freien Ende in den zweiten Abschnitt des Tragrohres im Bereich der schwenkbaren Befestigung hineinragt und damit eine Überdeckung zwischen dem Ende des ersten und zweiten Abschnittes des Tragrohres erzeugt und der erste und zweite Abschnitt des Tragrohres im Bereich der Überdeckung einen ellipsenförmigen Querschnitt aufweisen. Damit kann ein störungsfreier Übergang vom ersten zum zweiten Abschnitt des Tragrohres erzielt werden, wobei durch den ellipsenförmigen Querschnitt eine horizontale Beweglichkeit der Schwenkstelle erfolgen kann.Furthermore, it is proposed that the first section of the support tube protrudes with its free end into the second section of the support tube in the region of the pivotable attachment, thus creating an overlap between the end of the first and second sections of the support tube and the first and second sections of the support tube have an elliptical cross-section in the region of the overlap. In order for a trouble-free transition from the first to the second portion of the support tube can be achieved, with a horizontal mobility of the pivot point can be done by the elliptical cross-section.

Vorteilhaft ist, wenn der erste Abschnitt des Tragrohres im Bereich der Überdeckung auf der oberen und unteren Aussenfläche jeweils eine vertikal ausgerichtete Achse aufweist, welche zur schwenkbaren Lagerung des zweiten Abschnittes des Tragrohres in, an dessen Ende angebrachte und in Richtung des ersten Abschnittes des Tragrohres ausgerichtete einseitig offene Ausnehmungen ragen. Damit wird auch eine einfache Montage und Demontage des zweigeteilten Tragrohres ermöglicht.It is advantageous if the first portion of the support tube in the region of the overlap on the upper and lower outer surface each having a vertically oriented axis which for pivotally mounting the second portion of the support tube in, attached to the end and aligned in the direction of the first portion of the support tube Protruding unilaterally open recesses. This also allows for easy assembly and disassembly of the two-part support tube.

Um die Übergangsstelle der beiden Rohrabschnitte gegen die Umgebung abzuschotten, wird vorgeschlagen, dass der erste Abschnitt des Tragrohres im Bereich der Überdeckung mit dem zweiten Abschnitt des Tragrohres mit einer, auf dem Aussenumfang umlaufender Dichtung versehen ist.In order to seal off the transition point of the two pipe sections against the environment, it is proposed that the first section of the support tube in the region of the overlap with the second section of the support tube is provided with a circumferential seal on the outer circumference.

Aus fertigungstechnischen Gesichtspunkten ist es vorteilhaft, wenn die Dichtung aus einer, am Aussenumfang des ersten Abschnittes des Tragrohres umlaufenden Dichtlippe besteht, welche einstückig mit dem ersten Abschnitt des Tragrohrs verbunden ist. Dadurch wird eine kostengünstige Herstellung und gleichzeitig eine optimale und sichere Abdichtung im Bereich dieser Schwenkstelle gewährleistet.From a manufacturing point of view, it is advantageous if the seal consists of a, on the outer circumference of the first portion of the support tube circumferential sealing lip, which is integrally connected to the first portion of the support tube. This ensures a cost-effective production and at the same time an optimal and secure seal in the area of this pivot point.

Zur Anpassung der Schwenkstelle zur Erzielung einer, in jeder Schwenkstellung gewährleisteten Abdichtung zwischen den beiden Rohrabschnitten wird weiter vorgeschlagen, dass - in bezug auf die Schwenkachse - im Bereich der Überdeckung dieTo adapt the pivot point to achieve a guaranteed in each pivot position seal between the two pipe sections is further proposed that - with respect to the pivot axis - in the overlap the

Aussenkontur des ersten Abschnittes des Tragrohres und die Innenkontur des zweiten Abschnittes (des Tragrohres bogenförmig in einem Radius zur Schwenkachse verläuft. Damit wird die gleichmässige und sichere Anlage der Dichtung auf der Innenfläche des zweiten Rohrabschnittes in jeder Schwenkstellung gewährleistet.The outer contour of the first section of the support tube and the inner contour of the second section (of the support tube arcuately in a radius to the pivot axis.) Thus, the uniform and secure engagement of the seal on the inner surface of the second pipe section is guaranteed in each pivot position.

Um das zweigeteilte Tragrohr einfach in einer nachfolgenden Kupplungsstelle ankuppeln zu können, wird vorgeschlagen, dass der lichte Querschnitt des zweiten Abschnittes des Tragrohres ausgehend vom Bereich der Überdeckung bis zu seinem freien Ende von einem ellipsenförmigen Querschnitt in einen kreisförmig verkleinerten Querschnitt ändert.To be able to simply couple the split support tube in a subsequent coupling point, it is proposed that the clear cross section of the second portion of the support tube from an area of overlap to its free end of an elliptical cross section changes into a circular reduced cross-section.

Weitere Vorteile der Erfindung werden in nachfolgenden Ausführungsbeispielen näher beschrieben und aufgezeigt.Further advantages of the invention are described in more detail in subsequent embodiments and shown.

Es zeigen:

Fig.1
eine schematische Seitenansicht einer Spinnstelle einer Ringspinnmaschine mit einer Streckwerkseinheit mit einer Verdichtungsvorrichtung und einem erfindungsgemäss ausgebildeten zweiteiligen Tragrohr.
Fig.2
eine vergrösserte Teilansicht X nach Fig.2 mit zwei nebeneinander liegenden Verdichtungsvorrichtungen eines Zylinderstreckwerks.
Fig.3
eine vergrösserte dargestellte Schwenkstelle des zweigeteilten Tragrohres nach Fig.2.
Fig.3a
eine Schnittdarstellung A-A nach Fig.3
Show it:
Fig.1
a schematic side view of a spinning station of a ring spinning machine with a drafting unit with a compression device and an inventively designed two-piece support tube.
Fig.2
an enlarged partial view X after Fig.2 with two adjacent compression devices of a cylinder drafting system.
Figure 3
an enlarged illustrated pivot point of the two-part support tube after Fig.2 ,
3a
a sectional view AA after Figure 3

Figur 1 zeigt eine schematische Seitenansicht einer Spinnstelle 1 einer Spinnmaschine (Ringspinnmaschine) mit einer, von zwei nebeneinander liegenden Streckwerkseinheiten 2 eines Zylinderstreckwerkes 2z. Die Streckwerkseinheiten 2 sind jeweils mit einem Eingangswalzenpaar 3, einem Mittelwalzenpaar 4 und einem Ausgangswalzenpaar 5 versehen. Um die Mittelwalzen des Mittelwalzenpaares ist jeweils ein Riemchen geführt, die jeweils um einen nicht näher gezeigten Käfig in ihrer dargestellten Lage gehalten werden. Die oberen Walzen der genannten Walzenpaare 3 bis 5 sind als Druckwalzen ausgeführt, welche über die Achsen an einem schwenkbar gelagerten Druckarm (nicht gezeigt) drehbeweglich gelagert sind. FIG. 1 shows a schematic side view of a spinning station 1 a spinning machine (ring spinning machine) with one of two adjacent drafting units 2 of a cylinder drafting 2z. The drafting units 2 are each provided with an input roller pair 3, a middle roller pair 4 and a pair of output rollers 5. To each of the center rollers of the middle roller pair a strap is guided, which are each held around a cage not shown in detail in its illustrated position. The upper rollers of said pairs of rollers 3 to 5 are designed as pressure rollers which are rotatably mounted on the axes of a pivotally mounted pressure arm (not shown).

Die unteren Walzen der Walzenpaare 3, 4, 5 sind, mit einem nicht gezeigten Antrieb verbunden. Dabei können Einzelantriebe, wie auch andere Antriebsformen (Zahnräder, Zahnriemen, usw.) eingesetzt werden. Über die angetriebenen Unterwalzen werden die Druckwalzen, bzw. deren Riemchen über Friktion angetrieben. Die Umfangsgeschwindigkeit der Walzenpaare 4 ist etwas höher als die Umfangsgeschwindigkeit der Walzenpaare 3, sodass das, der Streckwerkeinheit 2 zugeführte Fasergut in Form einer Lunte L zwischen dem Eingangswalzenpaar 3 und dem Mittenwalzenpaar 4 einem Vorverzug unterworfen wird. Der Hauptverzug des Fasergutes L entsteht zwischen dem Mittenwalzenpaar 4 und dem Ausgangswalzenpaar 5, wobei das Ausgangswalzenpaar 5 eine wesentlich höhere Umfangsgeschwindigkeit als das Mittelwalzenpaar 4 aufweist. Das Ausgangswalzenpaar 5 ist im vorliegenden Beispiel mit einer Verdichtungsvorrichtung VV ausgestattet.The lower rollers of the roller pairs 3, 4, 5 are connected to a drive, not shown. In this case, individual drives, as well as other forms of drive (gears, timing belts, etc.) can be used. About the driven lower rollers, the pressure rollers, and their straps are driven by friction. The peripheral speed of the roller pairs 4 is slightly higher than the peripheral speed of the roller pairs 3, so that the, the drafting unit 2 supplied fiber in the form of a sliver L between the pair of input rollers 3 and the middle roller pair 4 is subjected to a pre-delay. The main distortion of the fiber material L is formed between the middle roller pair 4 and the output roller pair 5, the output roller pair 5 having a substantially higher peripheral speed than the middle roller pair 4. The output roller pair 5 is equipped in the present example with a compression device VV.

Die Verdichtungsvorrichtung VV besteht dabei aus einer Saugtrommel 6, welche über eine Achse 8 angetrieben wird. Der Saugtrommel 6 ist eine Druckwalze 9 zugeordnet, welche mit ihr eine Klemmstelle P1 bildet. Wie schematisch aus der vergrösserten Darstellung der Figur 2 zu entnehmen, ist die Saugtrommel 6 und die, zu ihr achsparallel zugeordnete Saugtrommel 6a mit auf ihrem Umfang angeordneten Öffnungen OE versehen. Im Anschluss an die Druckwalze 9 ist eine Klemmwalze 7 (auch Drehungssperrwalze genannt) angebracht, welche auf dem Umfang der Saugwalze 6 (bzw. 6a) aufliegt und zusammen mit dieser eine Klemmstelle P bildet (Fig.1). Zwischen den Klemmstellen P1 und P befindet sich eine Saugzone Z, in welcher das von der Klemmstelle P1 abgegebene Fasergut V durch die Einwirkung einer Saugluft verdichtet wird. Dieser Verdichtungsvorgang ist allgemein bekannt und auch schon in früheren Veröffentlichungen beschrieben worden. Es wird deshalb hier nicht näher darauf eingegangen. Oberhalb der Saugzone ist eine Abdeckung 13 angebracht, die zur Luftführung beim Verdichtungsprozess dient.The compression device VV consists of a suction drum 6, which is driven via an axis 8. The suction drum 6 is associated with a pressure roller 9, which forms with her a nip P1. As schematically from the enlarged view of FIG. 2 can be seen, the suction drum 6 and, associated with it axially parallel suction drum 6a provided with arranged on its circumference openings OE. Following the pressure roller 9, a pinch roller 7 (also called a rotation locking roller) is mounted, which rests on the circumference of the suction roller 6 (or 6a) and together with this forms a nip P ( Fig.1 ). Between the clamping points P1 and P there is a suction zone Z, in which the fiber material V discharged from the clamping point P1 is compressed by the action of a suction air. This compaction process is well known and has already been described in previous publications. It is therefore not discussed here in detail. Above the suction zone, a cover 13 is attached, which serves to guide the air during the compression process.

Das über die Klemmstelle P an der Klemmwalze 7 nach unten abgegebene, verdichtete Garn G wird über einen Fadenführer 43 einer schematisch gezeigten Ringspinneinrichtung zugeführt. Diese ist mit einem Ring 39 und einem Läufer 40 versehen, wobei das Garn G auf eine Hülse 41 zur Bildung einer Spule 42 (Kops) aufgewickelt wird. Der Ring 39 ist an einem Ringrahmen 44 befestigt, welcher während dem Spinnprozess eine Auf-und Abbewegung durchführt.The compressed yarn G delivered downwards via the clamping point P on the pinch roller 7 is fed via a yarn guide 43 to a ring spinning device shown schematically. This is provided with a ring 39 and a rotor 40, wherein the yarn G is wound onto a sleeve 41 to form a coil 42 (Kops). The ring 39 is attached to a ring frame 44 which performs an up and down movement during the spinning process.

Zur Erzeugung einer Saugluft im Bereich der Verdichtungszone Z der jeweiligen Saugtrommel 6, 6a sind innerhalb der Saugtrommeln Saugeinheiten 10, 10a angeordnet, was insbesondere aus der vergrösserten Ansicht X (nach Figur 1) in Figur 2 zu entnehmen ist. Aus Übersichtlichkeitsgründen wurde in Fig.2 auf die Darstellung des Eingangswalzenpaares 3 und des Mittelwalzenpaares 4, sowie der Druckwalze 9 und der Klemmwalze 7 verzichtet. Die Saugeinheit 10 der Saugtrommel 6 weist einen Saugschlitz (Saugöffnung) 11 auf, welcher auf der Innenseite der Saugtrommel 6 dem Bereich gegenüber steht, in welchem die Öffnungen OE auf dem Umfang der Saugtrommel 6 angeordnet sind.To generate a suction air in the region of the compression zone Z of the respective suction drum 6, 6a suction units 10, 10a are arranged within the suction drums, which in particular from the enlarged view X (after FIG. 1 ) in FIG. 2 can be seen. For clarity was in Fig.2 to the representation of the pair of input rollers 3 and the middle roller pair 4, and the pressure roller 9 and the pinch roller 7 omitted. The suction unit 10 of the suction drum 6 has a suction slot (suction opening) 11, which faces the area on the inside of the suction drum 6, in which the openings OE are arranged on the circumference of the suction drum 6.

Der Saugschlitz 11 ist mit einem innerhalb der Saugeinheit 10 angebrachten Saugkanal 12 verbunden, der in einer Ausgangsöffnung O1 eines Flansches F1 mündet, welcher an der Saugeinheit 10 angebracht ist. Koaxial zur Saugtrommel 6 ist auf der Welle 8 eine weitere Saugtrommel 6a angebracht, in welcher eine spiegelbildlich zur Saugeinheit 10 angebrachte Saugeinheit 10a vorgesehen ist. Die Saugeinheit 10a weist dabei ebenfalls einen Saugschlitz 11 auf, welcher in einen Saugkanal 12 mündet. Die Ausgangsöffnung 02 des Saugkanals 12 befindet sich in einem Flansch F2, welcher mit der Saugeinheit 10a verbunden ist. Da die Saugeinheiten im wesentlichen gleich sind (bis auf die spiegelbildliche Ausführung), wurden teilweise die gleichen Bezugszeichen verwendet.The suction slot 11 is connected to a suction channel 12 mounted inside the suction unit 10, which opens into an outlet opening O1 of a flange F1, which is attached to the suction unit 10. Coaxial with the suction drum 6, a further suction drum 6a is mounted on the shaft 8, in which a suction unit 10a mounted in mirror image with respect to the suction unit 10 is provided. The suction unit 10a also has a suction slot 11, which opens into a suction channel 12. The outlet opening 02 of the suction channel 12 is located in a flange F2, which is connected to the suction unit 10a. Since the suction units are substantially the same (except for the mirror-image embodiment), the same reference numerals have been used in part.

Die Ausgangsöffnungen O1, 02 der jeweiligen Flansche F1, F2 liegen einer Eingangsöffnung O eines Tragrohres 22 gegenüber, welches an einem Saugelement 15 befestigt ist. Um die beiden Saugeinheiten 10, 10a in ihrer in Figur 2 gezeigten Betriebslage zu halten, werden die Flansche F1, F2 über eine um Schwenkachsen 18 schwenkbar gelagerte Klappe 17 fixiert. Die Klappe 17 weist einen Riegel 28 auf, welcher in der in Figur 1 gezeigten geschlossenen Lage in eine nicht näher gezeigte Ausnehmung einer Führung 16 eingreift, welche am Saugelement 15 befestigt ist.The outlet openings O1, O2 of the respective flanges F1, F2 face an inlet opening O of a support tube 22, which is fastened to a suction element 15. To the two suction units 10, 10a in their in FIG. 2 To keep shown operating position, the flanges F1, F2 are fixed via a pivotally mounted about pivot 18 flap 17. The flap 17 has a latch 28, which in the in FIG. 1 shown closed position engages in a recess not shown in detail a guide 16, which is attached to the suction element 15.

Das Tragrohr 22 besteht aus einem, fest mit dem Saugelement 15 verbundenen ersten Abschnitt 23, auf welchem im Bereich einer Überdeckung Ü ein zweiter Abschnitt 24 des Tragrohres schwenkbar angeordnet ist. Dabei kann der zweite Abschnitt 24 um eine etwa vertikal ausgerichtete Schwenkachse 25 in einer horizontalen Ebene E verschwenkt werden. Wie aus der vergrösserten Darstellung in Figur 3 zu entnehmen, übergreift der zweite Rohrabschnitt 24 mit seinem Innenumfang D2 den Aussenumfang D1 des ersten Rohrabschnittes 23. Im Bereich der Überdeckung Ü mit dem Überdeckungsmass d weist das freie Ende S1 des ersten Rohrabschnittes 23 und das Ende S2 des zweiten Rohrabschnittes 24 jeweils einen elliptischen Querschnitt Q, Q1 auf, wie z. B. aus der Schnittdarstellung A-A (nach Figur 3) aus der Figur 3a zu entnehmen ist. In geringem Abstand s zum Ende des Rohrabschnittes 23 verläuft eine umlaufende Dichtung D in einem gleich bleibenden Abstand. Die Dichtung D ist zwischen dem Aussenumfang D1 des Rohrabschnittes 23 und dem Innenumfang D2 des Rohrabschnittes 24 angeordnet. Am Ende S1 des Rohrabschnittes 23 ist mittig und gegenüberliegend jeweils eine Schwenkachse 25 befestigt, über welche über eine Aussparung 27 das Ende S2 des Rohrabschnittes 24 geschoben ist. Die Aussparung 27 ist dabei so dimensioniert, sodass ein selbsttätiges Lösen aus der gezeigten montierten Stellung nicht möglich ist.The support tube 22 consists of a, fixedly connected to the suction member 15 first portion 23 on which in the region of a cover Ü a second portion 24 of the support tube is pivotally mounted. In this case, the second portion 24 can be pivoted about an approximately vertically oriented pivot axis 25 in a horizontal plane E. As from the enlarged view in FIG. 3 In the region of the overlap Ü with the overlap dimension d, the free end S1 of the first pipe section 23 and the end S2 of the second pipe section 24 each have an elliptical cross section Q, Q1 on, such. B. from the sectional view AA (according to FIG. 3 ) from the FIG. 3a can be seen. At a small distance s to the end of the pipe section 23 extends a circumferential seal D at a constant distance. The seal D is arranged between the outer circumference D1 of the pipe section 23 and the inner circumference D2 of the pipe section 24. At the end S1 of the pipe section 23 is centrally and opposite each mounted a pivot axis 25, via which via a recess 27, the end S2 of the pipe section 24 is pushed. The recess 27 is dimensioned so that an automatic release from the assembled position shown is not possible.

Um eine Schwenkbewegung des Rohrabschnittes 24 um die Achse 25 zu ermöglichen, ist das Ende S1 des Rohrabschnittes 23, in radialer Richtung zur Schwenkachse 25, mit einem Radius R1 versehen. D. h. der Rohrabschnitt 23 verjüngt sich im Bereich der Schwenkebene E zum Ende hin um den Radius R1. Ebenso ist auch das Ende S2 des Rohrabschnittes 24 im Bereich der Überdeckung Ü mit einem Innenumfang D2 versehen, welcher sich in der Schwenkebene E um den Radius R2 verjüngt. Damit wird das Ausweichen des zweiten Rohrabschnittes um einen Winkel a um die Schwenkachse 25 gewährleistet, wobei die Dichtung D bei jeder Schwenkstellung gleichmässig in Anlage an dem Innenumfang D2 verbleibt. Somit können über diese Schwenkstelle Toleranzen in der Positionierung ausgeglichen werden, welche zwischen der Verdichtungseinrichtung und einer nachfolgenden Kupplungsstelle für das Tragrohr auftreten können. Das zweite Ende S2 des Rohrabschnittes 24 des Tragrohres 22 ist mit einem kreisförmigen Querschnitt und mit einem Flansch 32 versehen, welcher in Verriegelungsstellung in eine Ausnehmung 33 eines Lagerelementes 30 eingreift. In diesem Lagerelement 30 ist auch ein weiteres Rohr 34 gelagert, dessen anderes Ende über eine Kupplung 35 in einen zentralen Absaugkanal 37 mündet, welcher mit einer Unterdruckquelle UP verbunden ist. Um bei der Montage des Tragrohres 22 dieses ohne Probleme in die Ausnehmung 33 des Lagerelementes 30 zu überführen, ist eine halbkreisförmige Einführhilfe EF vorgesehen, welche eine in Richtung des Lagerelementes 30 verjüngende konische Innenfläche aufweist. Das Lagerelement 30, das in der Regel als elastisches Gummielement ausgebildet ist, weist eine umlaufende Nut 36 auf, über welche es an einem Maschinenrahmen MR befestigt ist. Der Abstand m zwischen dem Ende S3 des Rohrabschnittes 24 und dem nachfolgenden Rohr 34 kann jetzt auf einem Minimum gehalten werden, zumal durch die Verwendung eines geteilten Absaugrohres 22 kein Toleranzausgleich mehr im Bereich des Lagerelementes erfolgen muss. Damit wird gewährleistet, dass das mit der Absaugluft mitgeführte Fasergut im wesentlichen über nicht anhaftende, glatte Innenflächen der Absaugeinrichtung geführt wird. Dadurch wird einerseits die Verschmutzungsgefahr innerhalb des Absaugsystems verringert und andererseits eine Verlängerung der Wartungsintervalle erzeugt.In order to allow a pivoting movement of the pipe section 24 about the axis 25, the end S1 of the pipe section 23, in the radial direction to the pivot axis 25, provided with a radius R1. Ie. the pipe section 23 tapers in the region of the pivoting plane E toward the end by the radius R1. Likewise, the end S2 of the pipe section 24 is provided in the region of the cover Ü with an inner circumference D2, which tapers in the pivoting plane E by the radius R2. Thus, the deflection of the second pipe section is ensured by an angle a about the pivot axis 25, wherein the seal D remains evenly in contact with the inner circumference D2 at each pivot position. Thus tolerances in the positioning can be compensated for this pivot point, which can occur between the compression device and a subsequent coupling point for the support tube. The second end S2 of the pipe section 24 of the support tube 22 is provided with a circular cross-section and with a flange 32 which engages in the locking position in a recess 33 of a bearing element 30. In this bearing element 30 is Also mounted another tube 34, the other end via a coupling 35 opens into a central suction channel 37, which is connected to a vacuum source UP. In order to transfer this without problems in the recess 33 of the bearing element 30 during assembly of the support tube 22, a semicircular insertion EF is provided, which has a tapering in the direction of the bearing element 30 conical inner surface. The bearing element 30, which is usually formed as an elastic rubber element, has a circumferential groove 36, via which it is attached to a machine frame MR. The distance m between the end S3 of the pipe section 24 and the subsequent pipe 34 can now be kept to a minimum, especially since the use of a split suction pipe 22 no tolerance compensation must be made in the region of the bearing element. This ensures that the fiber material entrained with the suction air is guided essentially over non-adhering, smooth inner surfaces of the suction device. As a result, on the one hand reduces the risk of contamination within the extraction system and on the other hand generates an extension of the maintenance intervals.

Claims (8)

Absaugvorrichtung für die Verdichtungsluft von wenigstens einer Saugeinheit (10, 10a) zur aerodynamischen Verdichtung eines Fasergutes (V), das über eine Saugzone (Z) eines, mit Perforationen (Ö) versehenen, umlaufenden Verdichtungselementes (6, 6a) geführt wird, wobei die Saugeinheit (10, 10a) mit einer Saugöffnung (11) versehen ist, die mit einem in der Saugeinheit integrierten Saugkanal (12) verbunden ist und mit einem Saugelement (15), welches an einem ersten Ende (E1) direkt oder indirekt mit dem Saugkanal (15) der Saugeinheit (10, 10a) verbunden ist und Führungen (16) und Haltemittel (17) aufweist über welche die wenigstens eine Saugeinheit (10, 10a) gehalten wird und an einem zweiten Ende (E2) ein, starr mit dem Saugelement (15) verbundenes Tragrohr (22) aufweist, welches in ein gummielastisches Lagerelement (30) mündet, das über ein weiteres Rohr (34) mit einem zentralen Absaugkanal (37) in Verbindung steht, dadurch gekennzeichnet, dass das Tragrohr (22) zweigeteilt ausgeführt ist und der, in das Lagerelement (30) mündende zweite Abschnitt (24) des Tragrohres (22) an dem, fest mit dem Saugelement (15) verbundenen ersten Abschnitt (23) des Tragrohres (22) in einer horizontalen Ebene (E) um eine Schwenkachse (25) schwenkbar befestigt ist.Suction device for the compressed air of at least one suction unit (10, 10a) for the aerodynamic compression of a fiber material (V), which over a suction zone (Z) of a perforated with (O), circumferential compression element (6, 6a) is guided, wherein the Suction unit (10, 10a) is provided with a suction opening (11) which is connected to a suction channel integrated in the suction unit (12) and with a suction element (15) which at a first end (E1) directly or indirectly with the suction channel (15) the suction unit (10, 10a) is connected and guides (16) and holding means (17) via which the at least one suction unit (10, 10a) is held and at a second end (E2), rigid with the suction element (15) connected support tube (22) which opens into a rubber-elastic bearing element (30) which communicates via a further tube (34) with a central suction channel (37), characterized in that the support tube (22) in two parts au is led and the, in the bearing element (30) opening second portion (24) of the support tube (22) on the, fixed to the suction member (15) connected to the first portion (23) of the support tube (22) in a horizontal plane (E) is pivotally mounted about a pivot axis (25). Absaugvorrichtung nach Anspruch 1, dadurch gekennzeichnet, der erste Abschnitt (23) des Tragrohres (22) mit seinem freien Ende in den zweiten Abschnitt (24) des Tragrohres im Bereich der schwenkbaren Befestigung hineinragt und damit eine Überdeckung (Ü) zwischen dem Ende des ersten und zweiten Abschnittes des Tragrohres (22) erzeugt und der erste und zweite Abschnitt (23, 24) des Tragrohres im Bereich der Überdeckung (Ü) einen ellipsenförmigen Querschnitt (Q, Q1) aufweisen.Suction device according to claim 1, characterized in that the first section (23) of the support tube (22) protrudes with its free end into the second section (24) of the support tube in the region of the pivotable attachment and thus an overlap (Ü) between the end of the first and second portion of the support tube (22) and the first and second portions (23, 24) of the support tube in the region of the cover (Ü) have an elliptical cross-section (Q, Q1). Absaugvorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass der erste Abschnitt (23) des Tragrohres (22) im Bereich der Überdeckung (Ü) auf der oberen und unteren Aussenfläche jeweils eine vertikal ausgerichtete Achse (25) aufweisen, welche zur schwenkbaren Lagerung des zweiten Abschnittes (24) des Tragrohres (22) in an dessen Ende angebrachte und in Richtung des ersten Abschnittes (23) des Tragrohres ausgerichtete einseitig offene Ausnehmungen (27) ragen.Suction device according to claim 2, characterized in that the first portion (23) of the support tube (22) in the region of the overlap (Ü) on the upper and lower outer surface each having a vertically oriented axis (25), which for pivotally mounting the second portion (24) of the support tube (22) mounted in the end and in the direction of the first portion (23) the support tube aligned unilaterally open recesses (27) protrude. Absaugvorrichtung nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass der erste Abschnitt (23) des Tragrohres (22) im Bereich der Überdeckung (Ü) mit dem zweiten Abschnitt (24) des Tragrohres mit einer, auf dem Aussenumfang umlaufender Dichtung (D) versehen ist.Suction device according to one of claims 1 to 2, characterized in that the first portion (23) of the support tube (22) in the region of the overlap (Ü) with the second portion (24) of the support tube with a, on the outer circumference circumferential seal (D ) is provided. Absaugvorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Dichtung aus einer, am Aussenumfang des ersten Abschnittes (23) des Tragrohres (22) umlaufenden Dichtlippe (D) besteht, welche einstückig mit dem ersten Abschnitt (23) des Tragrohrs (22) verbunden ist.Suction device according to claim 4, characterized in that the seal consists of a, on the outer circumference of the first portion (23) of the support tube (22) encircling sealing lip (D), which is integrally connected to the first portion (23) of the support tube (22) , Absaugvorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass - in bezug auf die Schwenkachse - im Bereich der Überdeckung (Ü) die Aussenkontur (AK) des ersten Abschnittes des Tragrohres (22) und die Innenkontur (IK) des zweiten Abschnittes (24) des Tragrohres (22) bogenförmig in einem Radius (R1, R2) zur Schwenkachse (25) verläuft.Suction device according to one of claims 1 to 5, characterized in that - in relation to the pivot axis - in the region of the overlap (Ü) the outer contour (AK) of the first section of the support tube (22) and the inner contour (IK) of the second section ( 24) of the support tube (22) arcuately in a radius (R1, R2) to the pivot axis (25). Absaugvorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass der lichte Querschnitt des zweiten Abschnittes (24) des Tragrohres (22) ausgehend vom Bereich der Überdeckung (Ü) bis zu seinem freien Ende von einem ellipsenförmigen Querschnitt (Q1) in einen kreisförmig verkleinerten Querschnitt (K1) ändert.Suction device according to claim 6, characterized in that the clear cross-section of the second section (24) of the support tube (22) starting from the region of the cover (Ü) to its free end of an elliptical cross-section (Q1) in a circular reduced cross-section (K1 ) changes. Tragrohr einer Absaugvorrichtung zur Verwendung nach einem der Ansprüche 1 bis 7.Support tube of a suction device for use according to one of claims 1 to 7.
EP12004341.9A 2011-07-25 2012-06-07 Compaction sensor for a spinning machine Active EP2551388B1 (en)

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CH01243/11A CH705309A1 (en) 2011-07-25 2011-07-25 Suction device for the compression air a suction unit for aerodynamic compression of a fiber material.

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EP2551388B1 (en) 2016-04-13
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JP2013023807A (en) 2013-02-04
JP6037695B2 (en) 2016-12-07

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