US20020088674A1 - Brake for an open-end spinning rotor - Google Patents

Brake for an open-end spinning rotor Download PDF

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Publication number
US20020088674A1
US20020088674A1 US10/041,421 US4142102A US2002088674A1 US 20020088674 A1 US20020088674 A1 US 20020088674A1 US 4142102 A US4142102 A US 4142102A US 2002088674 A1 US2002088674 A1 US 2002088674A1
Authority
US
United States
Prior art keywords
brake
rotor
open
brake lining
lining
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.)
Abandoned
Application number
US10/041,421
Other languages
English (en)
Inventor
Heinz-Georg Wassenhoven
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.)
Oerlikon Textile GmbH and Co KG
Original Assignee
W Schlafhorst AG and Co
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 W Schlafhorst AG and Co filed Critical W Schlafhorst AG and Co
Assigned to W. SCHLAFHORST AG & CO. reassignment W. SCHLAFHORST AG & CO. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WASSENHOVEN, HEINZ-GEORG
Publication of US20020088674A1 publication Critical patent/US20020088674A1/en
Abandoned 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
    • D01H4/12—Rotor bearings; Arrangements for driving or stopping
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/02—Spinning or twisting arrangements for imparting permanent twist
    • D01H7/04—Spindles
    • D01H7/22—Braking arrangements

Definitions

  • the present invention relates generally to brakes for open-end spinning rotors and, more particularly, to such a brake for a spinning rotor which rotates at a high speed in a rotor housing and is rotatably supported by its rotor shaft in the bearing nip of a support-disk bearing and wherein the brake comprises at least one brake lever having a brake lining that can be placed on the rotor shaft upon actuation of the brake.
  • Open-end rotor spinning devices of the above-indicated type with braking devices that act on the rotor shaft of the spinning means are known in various embodiments and have long been known in the state of the art.
  • German Patent Disclosure DE 36 30 256 A1 discloses a brake for an open-end spinning rotor wherein the brake comprises a brake lever, having a brake lining, that can be adjusted from below against the rotor shaft and wherein the brake comprises two press pads with cheeks similar to brake linings which pads act from above on the rotor shaft.
  • the cheeks of the press pads have a different coefficient of friction than the brake lining arranged on the brake lever.
  • German Patent Disclosure DE 38 20 328 C2 teaches a rotor brake with tong arms arranged with specular symmetry. Each of the tong arms comprises an asbestos-free brake lining on the end. When the brake is actuated, the brake linings are placed on the rotor shaft at the same time, bringing the spinning rotor rotating at a high speed during the spinning operation to a standstill.
  • Such smooth brake linings have a significantly adverse effect on the operation of the brake since they result in distinctly longer braking times and a measurable loss of efficiency of the entire open-end spinning machine.
  • the service units of the spinning-start carriage as well as the open-end spinning device could experience significant damage.
  • brake linings consisting of a carbon fiber composite material have the disadvantage of being relatively more expensive.
  • the present invention addresses this objective by providing a brake for an open-end spinning rotor that rotates at a high speed in a rotor housing and is rotatably supported by a rotor shaft in a bearing nip of a support-disk bearing.
  • the brake comprises at least one brake lever having a brake lining manufactured from sintered bronze. The brake lever can be placed on the rotor shaft upon actuation of the brake.
  • brake lining of sintered bronze has the advantage that such a material is extremely resistant to temperature changes and also exhibits a very high wear resistance. Since brake linings of sintered bronze are, in addition, considerably more economical to manufacture than brake linings of carbon-containing material. Such brake linings have the advantages of the known brake linings without their disadvantages. For example, surface changes do not occur in brake linings of sintered bronze, even after a rather long run time, so that it is assured that the rotor brakes of the open-end spinning machine have a uniformly high braking action over their entire service life at a reasonable cost.
  • the brake linings can preferably be fixed via a screw bolt and a fastening nut in a readily replaceable manner to the associated brake levers so that when needed a worn brake lining can be removed simply by loosening the screw bolt without problems and replacing it with a new brake lining.
  • the brake lining has a downward-opening fastening slot into which a centering extension of the fastening nut fits in the assembled state. That is, the brake lining can be simply drawn up by the brake lever for replacement after the screw bolt has been loosened, during which the screw bolt and the fastening nut remain in their assembled state. The assembly of the new brake lining proceeds just as simply. In this instance, the brake lining is lowered with its fastening slot from above, over the screw bolt, and the centering extension of the fastening nut and the screw bolt is subsequently retightened.
  • FIG. 1 is a schematic view of an open-end rotor spinning device with a tong-like rotor brake as well as with brake linings detachably arranged on the brake levers and manufactured from sintered bronze.
  • FIG. 2 is an enlarged view of a brake lever with a brake lining in accordance with the present invention.
  • FIG. 3 is a front view of a brake lining with fastening nut in accordance with the present invention.
  • FIG. 4 is a side view of the brake lining according to FIG. 3.
  • the open-end rotor spinning device 1 shown in FIG. 1 is equipped with a known spinning means, a so-called spinning rotor (not shown in detail), which is rotatably supported by its rotor shaft 2 in bearing nip 3 of support disk bearing 4 .
  • Such a support disk bearing typically comprises two support disk pairs with front and rear support disks 7 connected via shaft 5 in such a manner as to rotate in unison, which shaft is rotatably supported in roller bearings 6 such as ball bearings.
  • rotor brake 8 is in the form of a tong having arms which can be positioned on rotor shaft 2 .
  • the tong arms of rotor brake 8 are designed as brake levers 9 , 10 that are supported in pivot shafts 11 , 12 in such a manner that they can rotate in a limited manner and are urged by an interposed spring element 25 into an open non-braking position.
  • brake levers 9 , 10 each have a bearing 13 on the end.
  • Brake lining 16 manufactured from sintered bronze is fastened in a replaceable manner to these bearings 13 via screw bolt 14 and fastening nut 26 .
  • Brake levers 9 , 10 each have sliding surface 18 on their end opposite brake lining 16 . Sliding surfaces converge toward one another in the assembled state.
  • roller-like pressure element 19 contacts sliding surfaces 18 , which element 19 is mounted so that it can shift in direction B and at the same time move brake levers 9 , 10 counter to the force of spring element 25 in a braking direction toward contact with the rotor shaft 2 .
  • Pressure element 19 is preferably fixed between the side walls of U-shaped actuating lever 20 which is mounted in a manner such that it can rotate in a limited manner about pivot axis 21 .
  • leaf spring 22 is fastened to actuating lever 20 and comprises catch ring 23 on its end.
  • An actuating linkage (not shown) contacts this catch ring 23 , which linkage is loaded in case of service by a movable service unit, a so-called spinning-start carriage, that automatically supplies the open-end rotor spinning devices.
  • brake lining 16 is essentially rectangular when viewed from the front and the comers are rounded off. Moreover, downwardly-opening fastening slot 15 is located on the bottom of brake lining 16 , as shown in FIG. 4. Fastening nut 26 engages with its centering extension 17 into this fastening slot 15 in the assembled state. That is, brake lining 16 can be fixed in a non-positive manner on brake levers 9 , 10 by screw bolts 14 and associated fastening nut 26 and can therefore be readily removed from the particular bearing 13 if required and replaced by a new brake lining 16 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Braking Arrangements (AREA)
US10/041,421 2001-01-08 2002-01-08 Brake for an open-end spinning rotor Abandoned US20020088674A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10100524A DE10100524A1 (de) 2001-01-08 2001-01-08 Bremse für einen Offenend-Spinnrotor
DE10100524.5 2001-01-08

Publications (1)

Publication Number Publication Date
US20020088674A1 true US20020088674A1 (en) 2002-07-11

Family

ID=7669956

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/041,421 Abandoned US20020088674A1 (en) 2001-01-08 2002-01-08 Brake for an open-end spinning rotor

Country Status (5)

Country Link
US (1) US20020088674A1 (cs)
EP (1) EP1221501B1 (cs)
CZ (1) CZ200244A3 (cs)
DE (2) DE10100524A1 (cs)
TR (1) TR200400860T4 (cs)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10760359B2 (en) 2018-07-11 2020-09-01 Weatherford Technology Holdings, Llc Wellbore tong
US11377915B2 (en) 2019-02-13 2022-07-05 Weatherford Technology Holdings, Llc Wellbore tong
US11572746B2 (en) 2019-10-18 2023-02-07 Weatherford Technology Holdings Llc Rotary gripping apparatus for a power tong
US11629561B2 (en) 2020-02-03 2023-04-18 Weatherford Technology Holdings, LLC. Brakes for a tong

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4443666A1 (de) * 1994-12-08 1996-06-20 Sinterstahl Gmbh Synchronring mit Reibfläche aus Sinterbronze
DE19618261A1 (de) * 1996-05-07 1997-11-13 Stahlecker Fritz Bremse für einen OE-Spinnrotor
DE19735973A1 (de) * 1997-08-19 1999-02-25 Schlafhorst & Co W Bremse für einen Offenend-Spinnrotor
DE19802655A1 (de) * 1998-01-24 1999-07-29 Schlafhorst & Co W Bremse für einen Offenend-Spinnrotor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10760359B2 (en) 2018-07-11 2020-09-01 Weatherford Technology Holdings, Llc Wellbore tong
US11377915B2 (en) 2019-02-13 2022-07-05 Weatherford Technology Holdings, Llc Wellbore tong
US11572746B2 (en) 2019-10-18 2023-02-07 Weatherford Technology Holdings Llc Rotary gripping apparatus for a power tong
US11629561B2 (en) 2020-02-03 2023-04-18 Weatherford Technology Holdings, LLC. Brakes for a tong
US11939824B2 (en) 2020-02-03 2024-03-26 Weatherford Technology Holdings, Llc Brakes for a tong

Also Published As

Publication number Publication date
DE10100524A1 (de) 2002-07-11
EP1221501A1 (de) 2002-07-10
CZ200244A3 (cs) 2002-08-14
EP1221501B1 (de) 2004-04-07
TR200400860T4 (tr) 2004-06-21
DE50101900D1 (de) 2004-05-13

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Legal Events

Date Code Title Description
AS Assignment

Owner name: W. SCHLAFHORST AG & CO., GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WASSENHOVEN, HEINZ-GEORG;REEL/FRAME:012477/0455

Effective date: 20011207

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION