EP4299808A1 - Section de régulation, procédé de fonctionnement d'une section de régulation ainsi que procédé de rééquipement d'une section de régulation - Google Patents

Section de régulation, procédé de fonctionnement d'une section de régulation ainsi que procédé de rééquipement d'une section de régulation Download PDF

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Publication number
EP4299808A1
EP4299808A1 EP23182368.3A EP23182368A EP4299808A1 EP 4299808 A1 EP4299808 A1 EP 4299808A1 EP 23182368 A EP23182368 A EP 23182368A EP 4299808 A1 EP4299808 A1 EP 4299808A1
Authority
EP
European Patent Office
Prior art keywords
speed
regulating
motor
main
roller combination
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.)
Pending
Application number
EP23182368.3A
Other languages
German (de)
English (en)
Inventor
Dietmar Greis
Holm Göhler
Daniel Schmolke
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.)
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 EP4299808A1 publication Critical patent/EP4299808A1/fr
Pending legal-status Critical Current

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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
    • D01H5/32—Regulating or varying draft
    • D01H5/38—Regulating or varying draft in response to irregularities in material ; Measuring irregularities
    • D01H5/42—Regulating or varying draft in response to irregularities in material ; Measuring irregularities employing electrical time-delay devices
    • 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
    • D01H5/32—Regulating or varying draft
    • 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
    • D01H5/22—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by rollers only

Definitions

  • the present invention relates to a regulating line with a drafting system which has a plurality of roller combinations arranged one behind the other for drawing a nonwoven fabric to be processed, and with a drive unit for driving the plurality of roller combinations, the drive unit comprising: a main motor for driving at a constant speed at least a first roller combination with a main speed , and a regulating motor for regulating the speed of at least a second roller combination, wherein by regulating the speed of the second roller combination can be changed from a basic speed that is dependent on the main speed to a regulating speed that is independent of the main speed, and so the distortion of the fiber fleece can be adjusted.
  • the invention further relates to a method for operating a regulating section and a method for converting a regulating section.
  • a regulating section which has a main motor for driving at least two roller combinations and a regulating motor for superimposed driving of at least one of the roller combinations.
  • a differential gear which is connected on the one hand to the main motor and on the other hand to the regulating motor, a basic speed of the main motor can be superimposed by the regulating motor.
  • the differential gear is very maintenance-intensive and very susceptible to repairs, especially as the operating time increases.
  • the main motor and/or regulating motor used here can only be maintained or replaced with a very high level of technical effort.
  • the object of the present invention is to eliminate the disadvantages known from the prior art.
  • the task is solved by a regulating section, a method for operating a regulating section and a method for converting a regulating section with the features of the independent patent claims.
  • What is proposed is a regulating section with a drafting system which has several roller combinations arranged one behind the other for drawing a nonwoven fabric to be processed and a drive unit for driving the several roller combinations.
  • Pairs of rollers consisting of two rollers and/or arrangements of three rollers are usually used as roller combinations.
  • the drafting system usually has three roller combinations, which can be referred to as an input roller combination, a middle roller combination and an output roller combination.
  • a plurality of slivers enter the input roller combination, in which the fiber fleece to be processed is formed by pressing the incoming slivers together.
  • the fiber fleece is then drawn in the drafting system, with the input roller combination and the middle roller combination usually forming a pre-draft field.
  • the middle roller combination and the output roller combination usually form a main draft field.
  • the drive unit comprises a main motor for driving at least a first roller combination at a constant speed at a main speed. Furthermore, the drive unit comprises a regulating motor for regulating the speed of at least one second roller combination, wherein by regulating the speed of the second roller combination can be changed from a basic speed that is dependent on the main speed to a regulating speed that is independent of the main speed, and the distortion of the fiber fleece can thus be adjusted.
  • the main motor drives the output roller combination so that it is operated at a constant speed or at a constant delivery speed.
  • the regulating motor drives preferably the input roller combination and/or the middle roller combination.
  • the regulating motor is designed to be independent of the main motor and, based on an electrical signal dependent on the main speed, drives the second roller combination at the regulating speed independently of the main motor.
  • drive-independent is that the rotational movement of the regulating motor is mechanically independent of the main motor.
  • the respective output elements of the regulating motor and the main motor are designed to rotate independently of one another.
  • the basic speed of the regulating motor depends directly on the main speed of the main motor.
  • the electrical signal which depends on the main speed, is passed on directly or indirectly from the main motor to the regulating motor. Based on this electrical signal, the regulating motor is driven at the regulating speed, whereby the regulating speed can differ from the basic speed.
  • the main motor drives the at least one first roller combination at the constant main speed.
  • the basic speed of the regulating motor is based on the main speed of the main motor. If the regulating motor drives the at least one second roller arrangement at the basic speed, the regulating section is operated with a predefined delay. In order to change the distortion in the drafting system, the basic speed can be replaced by a variable regulating speed.
  • the regulating motor drives the second roller arrangement based on the electrical signal dependent on the main speed, there is no mechanical transmission of the speed, for example through belt drives. necessary. A complicated drive unit with a differential gear can therefore be omitted.
  • the electrical signal can also be manipulated very easily to adapt and/or change the regulating speed and/or the basic speed.
  • the drive unit has a speed sensor for recording the speed of the at least one first roller combination and/or the main motor.
  • the speed sensor can thus detect the main speed of the first roller combination directly on the first roller combination and/or calculate it using the speed of the main motor. This allows the main speed to be determined very easily and precisely.
  • an existing speed sensor can be reused and/or the speed sensor can simply be attached later.
  • the drive unit has at least one translation unit for translating the speed recorded by the speed sensor into the basic speed of the second roller combination.
  • the recorded speed can, as already described above, be the main speed and/or the speed of the main motor.
  • the transmission unit translates the recorded speed with a constant transmission ratio, so that the basic speed formed from this is directly dependent on the main speed.
  • the translation unit can alternatively be integrated in the speed sensor so that it outputs the basic speed as an electrical signal.
  • the basic speed of several second roller combinations, such as an input roller combination and an output roller combination can differ from one another.
  • translation elements and/or belt drives can be used to translate the speeds.
  • the regulating section comprises a pair of sensing rollers for detecting the thickness of at least one sliver entering the drafting system.
  • the pair of feeler rollers is connected upstream of the input roller combination, so that the thickness of the at least one incoming sliver can be determined before a fiber fleece is formed from it.
  • the regulating section comprises a specification unit which is in electrical operative connection with the pair of feeler rollers and specifies a superposition speed and/or determines it from the thickness of the at least one sliver.
  • the drafting system is adjusted based on the thickness of the incoming slivers.
  • the default unit can be used to determine the superposition speed from the thickness measured by the pair of feeler rollers, which is necessary to superimpose the basic speed of the regulating motor in order to obtain a uniform or the desired distortion of the fiber fleece.
  • the drive unit has a control unit for calculating the regulating speed and/or for controlling the regulating motor.
  • the control unit preferably adds the basic speed output by the translation unit with the superposition speed output by the default unit.
  • the control unit is in operative connection with a quality sensor connected downstream of the drafting system, so that the stretched sliver is checked for quality before it is placed in the can.
  • the regulating speed can be adjusted based on the quality of the stretched sliver.
  • the drive unit has at least one transmission line for transmitting the electrical signal between the regulating motor, the main motor, the speed sensor, the translation unit, the pair of feeler rollers, the specification unit and / or the control unit.
  • the transmission line can be used for signal transmission of the electrical signal. It is also conceivable that the signal transmission takes place using a transmitter/receiver unit, so that the electrical signal is transmitted wirelessly or by radio.
  • control unit is in electrical operative connection with the specification unit, the translation unit and/or the regulating motor in such a way that the regulating speed is calculated from the superposition speed and the basic speed and/or is transmitted to the regulating motor as an electrical signal.
  • the main motor is designed as an asynchronous motor and/or the regulating motor as a reluctance motor.
  • the main motor as an asynchronous motor has the advantage that it keeps the speed almost constant. It also has a very robust structure and is inexpensive to manufacture.
  • the regulating motor as a reluctance motor in particular as a synchronous reluctance motor, has the advantage that it has a simple and uncomplicated structure and can therefore be operated very reliably and cost-effectively.
  • the synchronous reluctance motor is preferably operated with a frequency converter, which is arranged, for example, in the control unit. This allows a very high level of efficiency to be achieved.
  • a method for operating a regulating system is proposed.
  • a fiber fleece to be processed is drawn using a drafting system that includes several roller combinations arranged one behind the other and the several roller combinations are driven by a drive unit.
  • a main motor of the drive unit drives at least a first roller combination at a main speed.
  • a regulating motor of the drive unit regulates the speed of at least a second roller combination, thereby regulating the speed of the second Roller combination is changed from a basic speed that is dependent on the main speed to a regulating speed that is independent of the main speed and the distortion of the fiber fleece is thus adjusted.
  • the regulating motor drives the second roller combination at the regulating speed, independent of the main motor, based on an electrical signal that is dependent on the main speed.
  • the regulating motor drives the second roller arrangement based on the electrical signal dependent on the main speed, no mechanical transmission of the speed is necessary.
  • a differential gear is no longer required in the drive unit. This eliminates the need to mechanically pass on the speed from the main motor to the second roller combination.
  • the electrical signal can be manipulated very easily to adapt and/or change the regulating speed and/or the basic speed.
  • the regulating section in this changeover process includes a drafting system which has several roller combinations arranged one behind the other for drawing a nonwoven fabric to be processed.
  • the regulating section includes a drive unit for driving the multiple roller combinations.
  • the drive unit comprises a main motor for driving at least a first roller combination at a constant speed at a main speed.
  • the drive unit further comprises a differential gear for transmitting the speed of the main motor to at least one second roller combination, so that a basic speed of the second Roller combination depends on the main speed of the first roller combination.
  • the drive unit comprises a superposition motor for superimposing the basic speed with a superimposition speed by means of the differential gear, so that the speed of the at least one second roller combination can be changed from the basic speed to a regulating speed by superimposing and so the distortion of the fiber fleece can be adjusted.
  • the differential gear is preferably designed as a planetary gear, which enables three-shaft operation.
  • the differential gear has a first drive element that is driven by the main motor.
  • a second drive element of the differential gear is driven by the superposition motor.
  • the at least one second roller combination can be driven by means of an output element of the differential gear.
  • the differential gear is removed from the drive unit and the superposition motor is replaced with a regulating motor that is independent of the main motor, whereby the regulating motor, after installation in the regulating section, drives the second roller combination independently of the main motor at the regulating speed based on an electrical signal dependent on the main speed.
  • the mechanical differential gear which is susceptible to repairs, can be removed.
  • the regulating motor then drives the second roller combination mechanically independently of the main motor, which is why superimposition of the speeds is no longer necessary. This leads to lower-maintenance operation of the regulating system after the conversion.
  • the regulating section is designed according to the previous description after the conversion, whereby the features mentioned can be present individually or in any combination. It is also advantageous if at least one drive element and/or output element of the differential gear is reused as a translation element of the regulating motor.
  • the drive elements here are understood to be elements of the differential gear that was removed during conversion, on which the main motor and/or the superposition motor drives the differential gear. Such drive elements can be, for example, drive shafts and/or drive pulleys. Such drive elements are often connected to the superposition motor and/or to the main motor by means of belt drives.
  • An output element is to be understood as an element which connects the differential gear with the second roller combination and drives it.
  • an additional belt drive can be provided to translate the speed.
  • the at least one drive element and/or output element can be designed to set or adjust the translation. Different sizes of the at least one drive element and/or output element can lead to different speeds of the second roller combination. This may be necessary, for example, when changing the material of the sliver or slivers to adjust the main draft and/or the pre-draft. This setting of the main delay and/or the preliminary delay is independent of the regulation and therefore represents a permanent change in the delay.
  • a translation element of the regulating motor is to be understood as an element that is pushed directly onto the regulating motor or arranged indirectly between the regulating motor and the at least one second roller combination, so that the translation element can translate the speed towards the second roller combination.
  • a mechanical or electromagnetic brake of the drive unit is removed.
  • the brake is usually used to brake the superposition motor so that the at least one second roller combination is operated at its base speed. Since the superposition motor is removed, the brake is no longer needed and the speed control can be done electrically. For this purpose, the control unit is used to regulate the speed. This means that the brake can be used to save another wear-and-tear device (in addition to the differential gear).
  • FIG. 1 shows a schematic representation of a regulating section 1 according to the prior art.
  • the regulating section 1 one or more supplied slivers 2 are evened out and stretched in a known manner and then placed in a can, not shown here.
  • the slivers 2 are fed to a drafting system 4 via a pair of feeler rollers 3. It is also possible for the slivers 2 to be compressed into a sliver 2 by means of a compressor, not shown here, before being fed to the pair of feeler rollers 3.
  • the drafting system 4 includes several in a row arranged roller combinations 6, 6 ', 6".
  • the roller combinations 6, 6', 6" are designed to distort a fiber fleece 7 formed from the at least one sliver 2.
  • roller combinations 6, 6', 6" can be designed as roller pairs with two rollers or as a roller combination with three rollers.
  • three roller combinations 6, 6', 6" are in the form of an input roller combination 6, a middle roller combination 6' and one Output roller combination 6" available.
  • the input roller combination 6 and the middle roller combination 6 ' form a pre-draft field.
  • the middle roller combination 6' and the output roller combination 6" form a main draft field. All roller combinations 6, 6', 6" are driven by a drive unit 8.
  • the output roller combination 6" is driven as the first roller combination 6" at a constant speed by a main motor 9 of the drive unit 8.
  • the output roller combination 6" rotates at a constant main speed.
  • the input roller combination 6 and the middle roller combination 6' are each designed as a second roller combination 6, 6' and are regulated.
  • the exemplary embodiment is the Figure 1 around the regulating section 1 according to the prior art, in which a differential gear 10 transmits the speed of the output roller combination 6" to the input roller combination 6 and to the middle roller combination 6', so that a basic speed of the input roller combination 6 and the middle roller combination 6' depends on the main speed of the output roller combination 6" depends.
  • the differential gear 10 can be designed, for example, as a planetary gear.
  • the differential gear 10 has a first drive element 11 second drive element 12 and an output element 13.
  • a constant speed is introduced into the main motor 9.
  • a superimposed speed can be introduced by a superimposed motor 14.
  • the regulating speed is therefore essentially the sum of the basic speed and the superimposed speed.
  • Different speeds can be achieved through different drive shafts of the roller combinations 6, 6', 6", whereby the basic speed and/or the regulating speed of the regulated roller combinations 6, 6' can differ from one another. Additional transmission stages and/or belt drives can also be added to the individual roller combinations 6, 6', 6", which means the speeds can differ.
  • the distortion of the fiber fleece 7 can be adjusted or changed.
  • the main distortion in particular changes from the middle roller combination 6 'to the output roller combination 6".
  • the thickness of the incoming slivers 2 is detected by the pair of feeler rollers 3.
  • the pair of feeler rollers 3 is in electrical operative connection with a specification unit 15, which sets the superposition speed for the superposition motor 14 and/or determined from the thickness of the sliver 2.
  • the specification unit 15 is also in electrical operative connection with the superposition motor 14.
  • the drive unit 8 has a brake 16 in the area of the differential gear 10 or between the differential gear 10 and the superposition motor 14, which can in particular completely brake the superposition motor 14 and/or the second drive element 12. In this way, the current speed of the input roller combination 6 and the middle roller combination 6 'can be braked down to the basic speed as quickly as possible.
  • the representation of the drive unit 8 is the Figure 1 and also the following one Figure 2 are highly simplified models.
  • FIG 2 shows a schematic representation of a regulating section 1 according to the invention.
  • the differential gear 10 was removed and the superposition motor 14 was replaced with a regulating motor 17 that is independent of the main motor 9, so that the regulating motor 17 controls the input roller combination 6 and the middle roller combination 6 'independently based on an electrical signal 18 dependent on the main speed from the main motor 9 drives at the regulating speed.
  • the regulating motor 17 is preferably designed as a reluctance motor.
  • the main motor 9 is preferably designed as an asynchronous motor, so that it is driven at a constant speed.
  • a speed sensor 19 for recording the speed of the main motor 9 and/or the output roller combination 6".
  • the speed sensor 19 is in electrical operative connection with a translation unit 20, for example by means of transmission lines, which translates the recorded speed into the basic speed of the input roller combination 6 and / or the middle roller combination 6 'or into the speed of the regulating motor 17 required for this.
  • the drive unit 8 of the regulating section 1 according to the invention in the exemplary embodiment shown has the Figure 2 a control unit 21, which can calculate or control the regulating speed of the regulating motor 17.
  • the control unit 21 is in electrical operative connection with the specification unit 15, the translation unit 20 and the regulating motor 17.
  • the control unit 21 thus calculates the regulating speed based on the basic speed from the translation unit 20 and the superposition speed from the specification unit 15.
  • the default unit 15 is preferably reused by the regulating section 1 according to the prior art.
  • the regulating section 1 according to the state of the art ( Figure 1 ) to the regulating section 1 according to the invention ( Figure 2 ) is preferably reused at least one of the drive elements 11, 12 and / or the output elements 13 of the differential gear 10 in the regulating motor 17 as a translation element 22.
  • the translation element 22 translates the speed of the regulating motor 17, so that the input roller combination 6 and the middle roller combination 6 'are driven at the regulating speed.
  • the regulating speed of the input roller combination 6 and the middle roller combination 6' can also differ from one another in the exemplary embodiment in FIG.
  • the second drive element 12 of the differential gear 10 was reused as a translation element 22 of the regulating motor 17.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP23182368.3A 2022-07-01 2023-06-29 Section de régulation, procédé de fonctionnement d'une section de régulation ainsi que procédé de rééquipement d'une section de régulation Pending EP4299808A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022116504.3A DE102022116504A1 (de) 2022-07-01 2022-07-01 Regulierstrecke, Verfahren zum Betreiben einer Regulierstrecke sowie Verfahren zum Umrüsten einer Regulierstrecke

Publications (1)

Publication Number Publication Date
EP4299808A1 true EP4299808A1 (fr) 2024-01-03

Family

ID=87060394

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23182368.3A Pending EP4299808A1 (fr) 2022-07-01 2023-06-29 Section de régulation, procédé de fonctionnement d'une section de régulation ainsi que procédé de rééquipement d'une section de régulation

Country Status (5)

Country Link
US (1) US20240003064A1 (fr)
EP (1) EP4299808A1 (fr)
CN (1) CN117328177A (fr)
BR (1) BR102023013267A2 (fr)
DE (1) DE102022116504A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08120528A (ja) * 1994-10-24 1996-05-14 Toyota Autom Loom Works Ltd 紡機の始動方法及び始動制御装置
WO1999011847A1 (fr) * 1997-09-01 1999-03-11 Maschinenfabrik Rieter Ag Banc d'etirage regule
EP2149628A1 (fr) 2008-07-30 2010-02-03 Rieter Ingolstadt GmbH Régulateur d'étirage doté d'un frein électrique et procédé de rééquipement d'un régulateur d'étirage pour un fonctionnement nécessitant peu d'entretien

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3150784A1 (de) 1981-12-22 1983-06-30 Zinser Textilmaschinen Gmbh, 7333 Ebersbach Strecke oder dergleichen
DE4012551C1 (fr) 1990-04-19 1991-06-27 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt, De
DE19925271B4 (de) 1999-06-02 2012-07-12 Trützschler GmbH & Co Kommanditgesellschaft Streckwerk für eine Spinnereimaschine, insbesondere eine Regulierstrecke für Baumwolle, Chemiefasern u. dgl.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08120528A (ja) * 1994-10-24 1996-05-14 Toyota Autom Loom Works Ltd 紡機の始動方法及び始動制御装置
WO1999011847A1 (fr) * 1997-09-01 1999-03-11 Maschinenfabrik Rieter Ag Banc d'etirage regule
EP2149628A1 (fr) 2008-07-30 2010-02-03 Rieter Ingolstadt GmbH Régulateur d'étirage doté d'un frein électrique et procédé de rééquipement d'un régulateur d'étirage pour un fonctionnement nécessitant peu d'entretien

Also Published As

Publication number Publication date
BR102023013267A2 (pt) 2024-01-16
CN117328177A (zh) 2024-01-02
US20240003064A1 (en) 2024-01-04
DE102022116504A1 (de) 2024-01-04

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