EP0315133A1 - Rotor à filer - Google Patents

Rotor à filer Download PDF

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Publication number
EP0315133A1
EP0315133A1 EP88118225A EP88118225A EP0315133A1 EP 0315133 A1 EP0315133 A1 EP 0315133A1 EP 88118225 A EP88118225 A EP 88118225A EP 88118225 A EP88118225 A EP 88118225A EP 0315133 A1 EP0315133 A1 EP 0315133A1
Authority
EP
European Patent Office
Prior art keywords
blind hole
shaft
spinning rotor
spinning
rotor according
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.)
Withdrawn
Application number
EP88118225A
Other languages
German (de)
English (en)
Inventor
Mojmir Rndr Ing. Kladensky
Martin Dipl.-Ing. Pirko
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.)
Elitex Zavody Textilniho
Elitex Koncern Textilniho Strojirenstvi
Original Assignee
Elitex Zavody Textilniho
Elitex Koncern Textilniho Strojirenstvi
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 Elitex Zavody Textilniho, Elitex Koncern Textilniho Strojirenstvi filed Critical Elitex Zavody Textilniho
Publication of EP0315133A1 publication Critical patent/EP0315133A1/fr
Withdrawn legal-status Critical Current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
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
    • D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor
    • D01H4/10—Rotors

Definitions

  • the invention relates to a spinning rotor for open-end spinning machines.
  • the spinning rotors which are mounted in roller bearings or in pairs of rolling rollers, reach 90,000 rpm during operation with the usual service life of the bearings.
  • a further increase in the rotor speed is hampered by vibrations, which are associated with the fact that the rotor shafts reach the range of the third critical speeds.
  • Critical speeds are shaft speeds at which the undamped shaft starts to vibrate with subsequent destruction. If the wave z. B. is damped by the use of a bearing bush, which is itself stored in a rubber bushing, or the like, the critical vibration conditions are avoided.
  • the occurring vibrations of the shaft but reduce the service life of the rolling bearings or the contact surface of the rolling rollers and the corresponding parts of the shaft surface. For these reasons, the operating speed of the rotor shaft must be at a safe distance below the critical speed mentioned, even if the rotors are dynamically balanced.
  • the object of the invention is to provide a spinning rotor in which the range of the third critical speeds is adjusted substantially upwards and which can also be operated at increased speeds above 100,000 rpm without impairing the service life of the shaft bearing.
  • the rotor shaft has at least one axial blind hole, at least on the side of its drive part that comes into contact with the drive belt means, the depth of which can be one to ten times the shaft diameter, this axial blind hole possibly having different cross sections have and possibly can also pass into a passage opening provided over the entire length of the shaft, the diameter of which is only small in comparison with that of the axial blind hole.
  • the solution according to the invention which substantially increases the range of the critical speeds, also enables the dynamic balancing of the rotor shaft by removing the material from the inside of the axial blind hole, so that the outer surface of the shaft is in no way impaired.
  • the spinning unit of an open-end spinning machine contains a spinning rotor, which consists of a shaft 1 and a head part 2, in which the spinning process takes place.
  • the free end section of the shaft 1 forms a drive part 3, which for this purpose is usually tangentially touched or partially wrapped with a drive belt 4.
  • the shaft 1 is supported in a multi-row bearing bush 5 sealed at the end, the two sets of balls of which run in annular grooves in the rotor shaft 1.
  • the bearing bush 5 is held in two elastic bushes 6, with which the entire rotor system is fastened in the body 7 of the spinning unit. Between the bearing bush 5 and the bushes 6 there is also a sleeve which extends beyond the bearing bush 5 and surrounds a thickened transition between the shaft 1 and the head 2 with play.
  • the shaft 1 is on the side of its drive part 3 provided with an axial blind hole 8, the depth of which can be one to ten times the shaft diameter.
  • the central blind hole can have different cross sections, namely through shoulders and / or (not shown) through a conical shape, the cone tip being directed towards the head part 2 of the rotor, possibly also having a different curvature.
  • the diameter of the blind hole 8 in the individual sections can be 0.2 to 0.95 of the shaft diameter.
  • a through-going axial bore 9 can be provided in the rotor shaft 1, the diameter of which may be substantially smaller than the diameter of the axial blind hole 8, which is also provided in the shaft 1 in this case is so that the effect pursued by the invention is retained.
  • the function of the axial blind hole 8 consists in relieving in particular the drive part 3 of the rotor shaft 1, the dynamic properties of the rotor shaft 1 being modified in such a way that the lower limit of their critical speeds increases.
  • the axial blind hole 8 can also be used for balancing the shaft 1 by removing material from its wall.
  • the blind hole 8 is partially or completely made of a material with a different specific weight fills in the z. B. can have damping properties against vibrations and prevents the ingress of dust into the blind hole 8 and through the narrow longitudinal bore 9 in the rotor head 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP88118225A 1987-11-04 1988-11-02 Rotor à filer Withdrawn EP0315133A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CS877891A CS265584B1 (en) 1987-11-04 1987-11-04 Rotor for spinning of a open-end spinning machine
CS7891/87 1987-11-04

Publications (1)

Publication Number Publication Date
EP0315133A1 true EP0315133A1 (fr) 1989-05-10

Family

ID=5428830

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88118225A Withdrawn EP0315133A1 (fr) 1987-11-04 1988-11-02 Rotor à filer

Country Status (2)

Country Link
EP (1) EP0315133A1 (fr)
CS (1) CS265584B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4009374A1 (de) * 1990-03-23 1991-09-26 Schlafhorst & Co W Spinnrotor fuer eine offen-end-spinnvorrichtung
CN113486560A (zh) * 2021-07-20 2021-10-08 中国科学院工程热物理研究所 一种发动机中心拉杆转子-支承系统动力学设计方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1200264A (en) * 1968-04-19 1970-07-29 Vnii Legkogo 1 Textilnogo Mash A twisting and forming device for break spinning
FR2202961A1 (en) * 1972-10-13 1974-05-10 Alsacienne Constr Meca Open end spinning device having spinning cup - to which fibres are fed through an annular channel defined by a centre body mounted in a duct
DE2405499A1 (de) * 1973-02-05 1974-08-15 Daiwa Spinning Co Ltd Bremsvorrichtung fuer die spinnturbine einer offen-end-spinneinheit
FR2348394A1 (fr) * 1976-04-13 1977-11-10 Heidenhain Gmbh Dr Johannes Palier a coussin d'air pour pieces tournant a grande vitesse
DE2748389A1 (de) * 1977-10-28 1979-05-03 Skf Kugellagerfabriken Gmbh Lagerung fuer spinnrotoren fuer offen- end-spinnvorrichtungen
DE3417705A1 (de) * 1983-04-16 1985-11-14 Fritz 7347 Bad Überkingen Stahlecker Oe-rotorspinnmaschine mit einer vielzahl von spinnaggregaten

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1200264A (en) * 1968-04-19 1970-07-29 Vnii Legkogo 1 Textilnogo Mash A twisting and forming device for break spinning
FR2202961A1 (en) * 1972-10-13 1974-05-10 Alsacienne Constr Meca Open end spinning device having spinning cup - to which fibres are fed through an annular channel defined by a centre body mounted in a duct
DE2405499A1 (de) * 1973-02-05 1974-08-15 Daiwa Spinning Co Ltd Bremsvorrichtung fuer die spinnturbine einer offen-end-spinneinheit
FR2348394A1 (fr) * 1976-04-13 1977-11-10 Heidenhain Gmbh Dr Johannes Palier a coussin d'air pour pieces tournant a grande vitesse
DE2748389A1 (de) * 1977-10-28 1979-05-03 Skf Kugellagerfabriken Gmbh Lagerung fuer spinnrotoren fuer offen- end-spinnvorrichtungen
DE3417705A1 (de) * 1983-04-16 1985-11-14 Fritz 7347 Bad Überkingen Stahlecker Oe-rotorspinnmaschine mit einer vielzahl von spinnaggregaten

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 8, no. 178 (C-238) 161 16 August 1984, & JP-A-59 076560 (TOSHIBA K.K.) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4009374A1 (de) * 1990-03-23 1991-09-26 Schlafhorst & Co W Spinnrotor fuer eine offen-end-spinnvorrichtung
CN113486560A (zh) * 2021-07-20 2021-10-08 中国科学院工程热物理研究所 一种发动机中心拉杆转子-支承系统动力学设计方法
CN113486560B (zh) * 2021-07-20 2022-07-26 中国科学院工程热物理研究所 一种发动机中心拉杆转子-支承系统动力学设计方法

Also Published As

Publication number Publication date
CS789187A1 (en) 1989-02-10
CS265584B1 (en) 1989-10-13

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