EP0454618B1 - Ensemble de cylindres d'étirage - Google Patents

Ensemble de cylindres d'étirage Download PDF

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Publication number
EP0454618B1
EP0454618B1 EP91810204A EP91810204A EP0454618B1 EP 0454618 B1 EP0454618 B1 EP 0454618B1 EP 91810204 A EP91810204 A EP 91810204A EP 91810204 A EP91810204 A EP 91810204A EP 0454618 B1 EP0454618 B1 EP 0454618B1
Authority
EP
European Patent Office
Prior art keywords
galette
drive motor
circulation space
roller unit
stretch roller
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.)
Expired - Lifetime
Application number
EP91810204A
Other languages
German (de)
English (en)
Other versions
EP0454618A1 (fr
Inventor
Vittorino Arnosti
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0454618A1 publication Critical patent/EP0454618A1/fr
Application granted granted Critical
Publication of EP0454618B1 publication Critical patent/EP0454618B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
    • D02J13/005—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass by contact with at least one rotating roll
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/224—Selection or control of the temperature during stretching

Definitions

  • the present invention relates to a draw roll unit for draw-bobbin, spinning-draw-winder and draw-twisting machines with an inductively heatable godet according to the preamble of claim 1, see e.g. EP-A-0 349 829.
  • the draw rollers are mostly driven by their own electric drive motor. Sparks can jump both in the motor and in the stretching roller, also called godet, within which windings for inductive heating are arranged. Simultaneously with the stretching process, it is common and often necessary to apply preparation agents to the yarn to be stretched. These preparation agents usually contain a proportion of volatile, easily flammable solvents. During the stretching process on the hot godet surface, the volatile, flammable parts of the preparation can evaporate from the yarn and together with the room air form a flammable, possibly explosive mixture that can be ignited by sparking in the stretch roller unit or in the drive motor.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims, solves the problem of creating a stretching roller unit which can be used in potentially explosive areas.
  • it is possible to flood the stretching roller unit with an incombustible gas without changing its dimensions Need to become.
  • This enables interchangeability with the conventional units.
  • This goal is achieved in that the incombustible gas is introduced into the fixed, drive-side part of the unit and runs through one or more circulation spaces from the drive side through the drive motor and / or the stretching roller and sweeps over all unit parts that may be subject to sparking.
  • the small cross section of the annular gap between the godet surface and the housing means that a constant overpressure can be maintained in the latter even with a very small amount of gas supplied to the unit.
  • the small amount of gas required has no influence on the temperature at the godet surface;
  • the gas flowing through increases the cooling in the drive motor.
  • the cooling for the stator part of the electric motor takes place independently of the flow through the central part of the unit.
  • the engine cooling which requires a large amount of air, can be done with room air, since no sparks can occur in the cooling area.
  • No sealant is required between the stationary and rotating parts for the access of the protective gas, since the supply takes place in the housing enclosing the motor and / or the godet.
  • there are no high demands on the tightness of this housing since small losses can be borne by the low overpressure required within the circulation space. The low overpressure is sufficient because the gas only has to prevent the entry of oxygen from the environment.
  • the two figures show a longitudinal section through a stretching roller unit, in which all parts that are not essential to the invention are omitted or only shown schematically.
  • the stretching roller unit 1 according to the invention according to FIG. 1 is rigidly or elastically fastened on a bearing frame 5 in the area of the drive motor 3.
  • the shaft 7 of the drive motor 3 projects beyond the motor housing 23 and carries on one side a first bearing 11 and on the other side a second bearing 13 and the stretching roller or godet 15. The latter is pushed onto the conical end 17 of the shaft 7 and with it screwed.
  • the rotor 19 is shown between the two bearings 11 and 13.
  • the stator 21, the motor housing 23 and the cooling fins 25 are visible outside the rotor 19.
  • Connected to the motor 3 is a housing 27 which receives the electrical transmission elements and which is closed on the back by a screwed-on terminal housing 29.
  • a supply line 31 for supplying gas is let into the terminal housing 29.
  • the cup-shaped godet 15 completely encloses the end 33 of the shaft 7.
  • the sleeve 37 has an inductor flange 39 on the drive motor side.
  • a cover collar 41 the bore diameter of which is only slightly larger than the outer diameter of the godet 15, which penetrates the cover collar 41, is attached to the drive motor 3.
  • the cover collar 41 is preferably made of a softer material than the godet 15, so that when the unit 1 runs in during commissioning when the cover collar 41 touches the godet surface 43, the latter is not damaged and a minimal annular gap 45 can be generated.
  • the shaft 7 is penetrated by an axial bore 47.
  • This bore 47 receives the feeds for the temperature probes 49 installed in the godet 15 for the temperature improvement of the godet surface 43.
  • the signals of the rotating probes 49 are transmitted to the fixed electronics 51 without contact in the housing 27.
  • a cover 53 in the form of a hollow cylinder jacket extends from the housing 27 over the motor housing 23 and encloses all parts of the motor 3 and the electronics 51 underneath.
  • a cooling air supply connection 55 connects the ventilation space 57 formed by the cover 53 and the surface of the motor housing 23 and the housing 27. The air exits from ventilation space 57 in area Y (arrow 58).
  • the feed line 31 in the terminal housing 29 forms the entrance to a circulation space 59 which begins in the terminal housing 29 and ends at the annular gap 45.
  • the circulation space 59 comprises the entire area of the electronics 51, in which the signal is transferred from rotating to stationary parts, and the pressure monitor 71, and extends further, partly in bores 52, partly through slots into the drive motor 3.
  • the circulation space 59 extends further to the area of the bearing 13. After a slight narrowing due to recesses and / or one or more bores 61, the circulation space 59 continues within the godet 15, first in a disk-shaped space running radially inward 63 to the shaft 7.
  • the space 59 extends as an annular gap 65 along the shaft end 33 to the end face 67 of the godet 15.
  • the circulation space 59 is again disk-shaped and then sits radially outside in a cylindrical gap 69 in the direction of the drive side and ends at the gap 45 between de r godet surface 43 and the cover collar 41.
  • the described circulation space 59 forms a closed jacket around all possible spark sources present on the stretching roller assembly 1.
  • the parts of the electronics 51 could be arranged in a rotating / fixed manner outside the circulation space 59 in a separate, locked space.
  • this would require a large number of openings to be sealed airtight.
  • It would also be possible to manufacture the spark-generating elements in an explosion-proof design. However, this causes many times higher costs.
  • nitrogen, clean air or another non-combustible gas is introduced into the circulation space 59 through the feed line 31. This fills up the entire space described above and flushes it out until it emerges outwards into the space along the gap 45 or, if a corresponding connecting line is provided, into a space outside the installation site of the unit. Due to the small width of the annular gap 45, a pressure can already be built up in the interior of the circulation space 59 by a small quantity supplied at the beginning, and thus the access of any explosive or combustible gas from the environment to spark-generating parts inside the unit 1 can be reliably prevented.
  • non-flammable gas is used for a predetermined time, for example three minutes, before start-up let in.
  • the mode of operation can be determined using one or more pressure gauges that are connected to the circulation space the rinse during the stretching process by continuously monitoring the overpressure.
  • Room air can be introduced through the air supply connection 55, even if it contains flammable gases, and the drive motor 3 can be cooled.
  • the rinsing, which is supplied through line 31, can be obtained from a bottle or from the atmosphere outside the working space of the stretching roller unit 1.
  • FIG. 2 shows such a stretching roller assembly, which has two separate circulation spaces for the drive motor 103 and the stretching roller 115.
  • a bearing with the two bearings 111 and 113 is located in the center.
  • the drive motor 103 is arranged on the left side of the bearing and the godet 115 on the right side.
  • gas is fed into the circulation space 159 through the line 131. At the other end of engine 103, the gas can escape again through a gap 145.
  • Gas is fed through a line 180 into a circulation space 183 in the godet 115 and can leave the godet 115 again through a gap 181.
  • the two feed lines 131 and 180 and the two outlet areas 145 and 181 can in each case be connected to a common feed or discharge line (no illustration).

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)

Claims (5)

  1. Ensemble de rouleaux d'étirage (1; 101) pour des étireuses- bobineuses, fileuses-étireuses-bobineuses et étireuses-retordeuses avec un galet (15; 115) chauffé par induction, et un moteur électrique d'entraînement (3; 103) pour le galet (15; 115) avec un arbre (7; 107) transmettant le mouvement de rotation du moteur d'entraînement (3; 103) au galet (15; 115), arbre qui est maintenu d'une manière rotative par au moins deux paliers (11, 13; 111, 113),
    caractérisé par le fait que
    le moteur d'entraînement (3; 103), les amenées transmettant le courant pour le moteur (3; 103) et le galet (15; 115) ainsi que les composants électroniques pour la surveillance de la température du galet et les enroulements d'induction (35; 135) pour le chauffage du galet (15; 115) sont entourés par une chambre de circulation (59; 159, 183), et que la chambre de circulation (59; 159, 183) peut être balayée par un gaz.
  2. Ensemble de rouleaux d'étirage selon revendication 1,
    caractérisé par le fait que
    la chambre de circulation (59; 159, 183) s'étend radialement vers l'extérieur, sur le côté frontal de l'enroulement d'induction (35; 135) du galet (15; 115), et sous la surface du galet, dans une fente (69; 169), dans la direction allant vers le moteur d'entraînement (3; 103).
  3. Ensemble de rouleaux d'étirage selon revendication 2,
    caractérisé par le fait que
    la chambre de circulation (59; 159, 183) est reliée avec l'atmosphère, par l'extrémité du galet (15; 115) du côté du moteur d'entraînement.
  4. Ensemble de rouleaux d'étirage selon revendication 3,
    caractérisé par le fait que
    la liaison de la chambre de circulation (59; 159, 183) avec l'atmosphère est réalisée par un espace de forme annulaire (45; 181) situé entre la surface (43; 143) du galet et un collet fixe de recouvrement (41; 141).
  5. Ensemble de rouleaux d'étirage selon l'une des revendications 1 à 4,
    caractérisé par le fait que
    le moteur d'entraînement (3) et le galet (15) possèdent une chambre de circulation (59) commune et les reliant entre eux, ou bien que le moteur d'entraînement (103) et le galet (115) possèdent deux chambres de circulation (159, 183) pour le gaz, indépendantes l'une de l'autre, avec une alimentation commune ou séparée (31; 131).
EP91810204A 1990-04-26 1991-03-22 Ensemble de cylindres d'étirage Expired - Lifetime EP0454618B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH143390 1990-04-26
CH1433/90 1990-04-26

Publications (2)

Publication Number Publication Date
EP0454618A1 EP0454618A1 (fr) 1991-10-30
EP0454618B1 true EP0454618B1 (fr) 1994-05-18

Family

ID=4210350

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810204A Expired - Lifetime EP0454618B1 (fr) 1990-04-26 1991-03-22 Ensemble de cylindres d'étirage

Country Status (4)

Country Link
US (1) US5324905A (fr)
EP (1) EP0454618B1 (fr)
JP (1) JPH04228643A (fr)
DE (1) DE59101640D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101617075B (zh) * 2007-02-16 2011-03-16 欧瑞康纺织有限及两合公司 导丝辊
DE102019134639A1 (de) * 2019-12-17 2021-06-17 Stc Spinnzwirn Gmbh Galette

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5763859A (en) * 1993-06-04 1998-06-09 Maschinenfabrik Rieter Ag Induction heating draw roller with vibration damping
KR100461685B1 (ko) * 1996-07-01 2005-07-07 바마크 악티엔게젤샤프트 사의안내및주행을위한고데트장치
DE19726258C2 (de) * 1996-07-01 2001-10-04 Barmag Barmer Maschf Galetteneinheit zum Führen und Fördern eines Fadens
CH692954A5 (de) * 1997-11-28 2002-12-31 Barmag Barmer Maschf Galette zum Fördern und Führen eines laufenden synthetischen Fadens.
DE19980953D2 (de) * 1998-05-28 2000-07-13 Barmag Barmer Maschf Galette zum Führen, Erwärmen und Fördern eines Fadens
DE19843990C1 (de) * 1998-09-25 1999-08-19 Dienes Apparatebau Gmbh Integriertes Galettenaggregat
JP5269546B2 (ja) * 2008-10-30 2013-08-21 株式会社ブリヂストン 導電性ローラ
CN105543985B (zh) * 2016-01-29 2017-10-10 佛山轻子精密测控技术有限公司 间隙可调的静电纺丝喷头及阵列式纺丝系统
DE102017009256A1 (de) * 2017-10-05 2019-04-11 Rpe Technologies Gmbh Garnbehandlungsvorrichtung

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1018863A (fr) * 1949-04-06 1953-01-14 Westinghouse Electric Corp Machine dynamo-électrique anti-déflagrante
US2761941A (en) * 1953-06-01 1956-09-04 Ardichvili Georges Roller temperature modifying apparatus
US3602746A (en) * 1970-03-23 1971-08-31 John C St Clair Motor-generator with hollow plastic rotor rotating in high pressure chamber
US3879594A (en) * 1972-09-29 1975-04-22 Terence Graham Shillito Temperature measurement and control of rotating surfaces
CH573992A5 (fr) * 1973-11-02 1976-03-31 Rieter Ag Maschf
DE2647540C2 (de) * 1976-10-21 1978-10-12 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Induktiv-beheizbare Galette
DE3033482C2 (de) * 1980-09-05 1983-06-23 Kleinewefers Gmbh, 4150 Krefeld Walze mit elektromagnetischer Heizung
DE3147829A1 (de) * 1981-12-03 1983-06-16 Robert Bosch Gmbh, 7000 Stuttgart Elektrische kollektormaschine, insbesondere als antriebsmotor fuer fahrzeuge
SE457183B (sv) * 1984-10-05 1988-12-05 Asea Ab Synkronmaskin
EP0235505B1 (fr) * 1986-03-03 1990-07-18 TEIJIN SEIKI CO. Ltd. Dispositif de refroidissement de palier pour un cylindre chauffant
DE58909654D1 (de) * 1988-06-30 1996-05-23 Rieter Ag Maschf Galette mit breitem Drehzahlbereich

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101617075B (zh) * 2007-02-16 2011-03-16 欧瑞康纺织有限及两合公司 导丝辊
DE102019134639A1 (de) * 2019-12-17 2021-06-17 Stc Spinnzwirn Gmbh Galette
WO2021123941A1 (fr) 2019-12-17 2021-06-24 Stc Spinnzwirn Gmbh Guide-fils de filage
DE102019134639B4 (de) 2019-12-17 2021-07-29 Stc Spinnzwirn Gmbh Galette

Also Published As

Publication number Publication date
EP0454618A1 (fr) 1991-10-30
US5324905A (en) 1994-06-28
JPH04228643A (ja) 1992-08-18
DE59101640D1 (de) 1994-06-23

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