US3746233A - Air-supported thread overrun roller - Google Patents

Air-supported thread overrun roller Download PDF

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Publication number
US3746233A
US3746233A US00269457A US26945772A US3746233A US 3746233 A US3746233 A US 3746233A US 00269457 A US00269457 A US 00269457A US 26945772 A US26945772 A US 26945772A US 3746233 A US3746233 A US 3746233A
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US
United States
Prior art keywords
roller
air
shell
segment
thread
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
US00269457A
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English (en)
Inventor
P Illg
B Schimmel
K Bauer
M Mayer
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 Barmag AG
Original Assignee
Barmag Barmer Maschinenfabrik 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 Barmag Barmer Maschinenfabrik AG filed Critical Barmag Barmer Maschinenfabrik AG
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Publication of US3746233A publication Critical patent/US3746233A/en
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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
    • 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
    • D02J1/225—Mechanical characteristics of stretching apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/14—Pulleys, rollers, or rotary bars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
    • F16C32/0681—Construction or mounting aspects of hydrostatic bearings, for exclusively rotary movement, related to the direction of load
    • F16C32/0696—Construction or mounting aspects of hydrostatic bearings, for exclusively rotary movement, related to the direction of load for both radial and axial load
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • an air-supported thread overrun roller of tubular shell construction rotatably carried on a hollow shaft segment of enlarged diameter having radial openings to direct compressed air into a small annular bearing gap, thereby providing an air-cushioned bearing for the shell, an annular face plate partly enclosing each end of the tubular shell and containing a plurality of air outlet channels extending approximately parallel to the shell and obliquely to the shell axis of rotation.
  • the thread overrun roller is especially useful in the high speed transport of threads, yarns or the like in stretching, twisting and other textile processing operations.
  • the invention relates generally to an air-supported or air-cushioned thread overrun roller, in which a tubular roller shell is turnably carried on an axle which has an axial air feed channel and, in the bearing zone of the roller shell, also has radial openings through which the compressed air passes into the bearing gap between the axle and the inner wall of the roller shell.
  • thread overrun rollers one generally means those rollers on a textile machine or apparatus which are driven by the running thread itself.
  • air-supported thread overrun rollers which are suited especially for use in thread treatment devices for synthetic threads, for example, for heated stretching or drawing, heat fixing and the like.
  • compressed air is supplied through a fixed pivot pin or axle and then passes through the porous structure of a sintered metal sleeve surrounding the axle into the bearing gap.
  • very high turning rates of the driven roller for example on the order of 30,000 rpm or more
  • such revolving rollers are no longer capable of meeting the requirements of textile machines operating at such high thread running speeds.
  • One object of the present invention is to provide an air-supported overrun roller for use in textile apparatus in such a way that the thread or yarn is relieved of undesirable tension, especially during the initial application of the thread, by providing means for accelerating the overrun roller in the starting phase. Moreover, it is also an object of the invention to achieve a stabilization of the axial position of the rotating roller member driven by the running thread. Yet another object of the invention is to provide means to control and/or vary the air pressure supplied to the overrun roller in order to obtain a more efficient and effective operation.
  • an air-supported thread overrun roller which comprises a hollow tubular roller shell adapted to be rotatably driven by a transported thread, axle means to carry said roller shell including a shaft segment having an inlet conduit for compressed air extending axially into said roller shell and a hollow cylindrical segment of enlarged diameter connected to said shaft segment so as to extend axially between the two ends of said roller shell and to provide a compressed air chamber fitting concentrically within said roller shell with a small annular bearing gap therebetween, the cylindrical wall of said enlarged segment having radial openings to release compressed air into said bearing gap, and an annular face plate on said roller shell at either end thereof with the inner diameter of the face plate being smaller than the outer diameter of said enlarged axle segment, each face plate having a plurality of air outlet channels approximately parallel to the roller shell and extending obliquely to the axis of rotation of the shell, said channels being arranged at regular intervals on a circle concentric to the
  • This particular structure of the thread overrun roller and its air-cushioned bearing means has the consequence that the air emerging laterally from the circumferential or narrow annular bearing gap thereupon flows obliquely to the axis of rotation through the airoutlet channels or openings ofthe face plates. in this escape of the compressed air, it undergoes such a deflection that an active force component arises preferably in tangential direction at the roller circumference, thereby yielding a positive drive moment for the roller completely apart from the drive imparted by the running thread.
  • the compressed air advantageously exerts two functions simultaneously.
  • the compressed air In addition to its basic function of assuring a very nearly frictionless suspension or air-cushioning of the roller shell, especially in the initial starting of the machine, the compressed air also has the function of providing a major or even substantial portion of the total drive force for rotating the roller shell. Accordingly, the constituent of the total acceleration moment to be contributed by the running thread is now only very slight so that the danger of thread breakage is virtually completely eliminated, even for threads having a fine denier or yarn size. The time required for initially applying or starting the overrun of the thread, moreover, is thereby considerably shortened.
  • a preferred feature of the invention resides in providing a structure wherein the diameter of the circle on which the oblique airoutlet channels lie or upon which these channels are centered cross-sectionally is equal to or very nearly equal to the mean diameter of the bearing gap between the axle and the inner wall of the roller shell. Furthermore, it is advantageous for the axle enlargement in the bearing zone of the roller shell to exhibit axially directed openings through its end walls, the compressed air passing through these openings into a gap space between the inner side of the face plates of the roller shell and the outwardly facing surfaces of the end walls of the enlarged segment of the axle.
  • this preferred construction prevents any suction formation between the face plates of the roller shell and the enlarged axle, and an air stream is generated radially in the small circular end gap spaces so as to ensure a full stabilization of the axial position of the roller shell.
  • an especially advantageous and preferred embodiment is one in which the air outlet channels in each annular face plate follow a curved path, such that these channels and their intervening bridges, lands or fillets are curved in scoop form in the manner of the blades of an axial turbine.
  • FIG. 1 is a longitudinal section through the axis of rotation of the thread overrun roller
  • FIG. 2 is a partial plan view taken from FIG. 1 to show partially sectioned end zones of the thread overrun roller;
  • FIG. 3 is a perspective view of another embodiment of a thread overrun roller with part of one end broken open;
  • FIG. 4 is a schematic representation of means for supplying and controlling the pressure of the air introduced into the pressure chamber of the thread overrun roller.
  • the fixed axle or shaft mounted in the frame 1 of a textile machine or thread treating apparatus is enlarged in diameter along one segment located in the bearing zone inside the roller as compared with respect to its adjoining segment or segments protruding axially from the roller, so that a pressure chamber 2 is provided into which there issues the compressed air feed conduit 3.
  • the radial bores 4 lead into a small annular bearing gap 5 formed between the enlarged segment 6 of the fixed axle l and the inner wall of the rotatably positioned tubular roller shell 7.
  • a number of axial bores 16 which also lead compressed air out of the pressure chamber 2 at either enclosed end.
  • Face plates 8 and 9 are permanently joined at each end to the roller shell 7 and have axial central bores 10 and 11 to accommodate theprotruding segment of a fixed axle l at one or both ends.
  • the air outlet channels 12 and 13 in these face plates run parallel to the outer circumferential surface of the roller shell 7 and according to FIG. 1 are schematically shown as being parallel to the axis of rotation but in fact, according to the plan view of FIG. 2, these outlet channels extend obliquely to the axis of rotation..
  • the lands, bridges or fillets 15 left between the air outlet channels 14 are constructed along curved lines in scoop or vanelike form in the fashion of the blades of an axial turbine. Through this construction, the force component of the compressed air acting in axial direction to the circumference of the roller is increased.
  • rollers can be carried by means of a radial air suspension.
  • the compressed air is conducted through the feed conduit 3 of fixed axle 1 into the pressure chamber 2.
  • Another non-illustrated embodiment of the invention can include fixed axles that protrude from each end of the roller and are secured on both sides to the machine frame.
  • the compressed air supplied to the pressure chamber 2 can emerge both through the radially directed bores 4 and also through the axially directed bores 16.
  • the air emerging through the bores 4 forms an air layer between the axle segment 6 and the roller shell 7, this air layer flowing in both circumferential and axial direction.
  • This layer thereby acts as a cushion exerting a radial outward force evenly around the entire circumference to maintain the shell 7 in a balanced concentric position on the enlarged axle 6.
  • the air emerging from this layer in the bearing gap 5 then flows obliquely out of the roller through the air outlet openings or channels l2, 13 or 14.
  • the component of recoil force generated by the obliquely emerging air i.e. a recoil force active in tangential direction to the circumference of the roller shell, drives the roller in the direction of arrow D.
  • the direction of the emerging air is indicated by arrows L.
  • This second air layer formed in the gap space 5' at each end of the axle segment 6 is in a plane perpendicular to the axis of rotation and is preferably somewhat narrower than the bearing gap 5 and/or provided with fewer openings 16 compared to radial openings 4 so that most of the compressed air flows axially out through the channels 12.
  • both concentric centering and axial positioning tend to be self-balancing in this roller device.
  • FIG. 4 there is schematically represented one example of means for the supply of compressed air under controlled conditions.
  • the box or vessel 17 can be any source of compressed air, for example, a compressed air main such as is commonly installed in most plants.
  • the hollow feed line of axle l fixed to frame 1' is connected over the branched lines 18 and 19 and the line T-section 20 with the compressed air source 17.
  • a pressure adjusting valve 21 and also a cut-off valve 22.
  • the compressed air line 19 also has a pressure adjusting valve 23 and a cut-off valve 24.
  • the pressure adjusting valve 21 can be set at that pressure required during the initial starting or accelerating phase, for example at a pressure of 6 atmospheres gauge.
  • the pressure adjusting valve 23 can be set at the pressure required for normal running operation, for example at one atmosphere gauge.
  • the blocking valve 22 is open and the cut-off valve 24 is closed.
  • the cut-off valve 22 is closed while the cut-off valve 24 is opened.
  • the operation of the cut-off valves can be carried out by hand or also electrically or pneumatically in conventional manner. Instead of the two cut-off valves 22 and 24, one can also use a single multi-path valve, e.g. alternating between two supply lines.
  • FIG. 4 further indicates a thread monitor device 25 with a thread sensor 26 by which the operation of the cut-off valves 22 and 24 can be automatically brought about over electric or pneumatic lines 28, 29 and 30 in response to the presence or absence of the thread 27 in contact with the sensor arm or feeler 26.
  • the operation of such valves can also depend upon thread tension changing the exact position of the sensor 26 as suggested by the broken line position 26.
  • More sophisticated pressure control means for adjusting the pressure inv response to thread tension can also be easily adapted to the illustrated thread overrun roller. The use of such control arrangements brings about a considerable saving in compressed air and a corresponding saving in electric power.
  • the thread overrun roller of the invention is thus useful as a driven roller of various known types, eg as a separator roller, a thread deflection or guide roller and alone or in combination with other rollers or guide means.
  • the air outlet channels located in the end face plates of the tubular roller shell, preferably axially adjacent to the inner circumference of the shell, are of particular value in quickly accelerating the rotational speed of the shell when the thread or yarn is first applied thereto so as to practically eliminate thread breakage.
  • the new air-supported thread overrun rollers of the invention are easily constructed and readily installed by means of their fixed axle or carrying shaft on the frames or by supplemental supports on existing textile machinery. Many variations are possible within the intended scope of this invention.
  • An air-supported thread overrun roller in textile apparatus comprising:
  • axle means to carry said roller shell including a shaft segment having an inlet conduit for compressed air extending axially into said roller shell and a hollow cylindrical segment of enlarged diameter connected to said shaft segment so as to extend axially between the two ends of said roller shell and to provide a compressed air chamber fitting concentrically within said roller shell with a small annular bearing gap therebetween, the cylindrical wall of said enlarged segment having radial openings to release compressed air into said bearing gap; and
  • each-face plate having a plurality of air outlet channels approximately parallel to the roller shell and extending obliquely to the axis of rotation of the shell, said channels being arranged at regular intervals on a circle concentric to the axis of rotation of the shell.
  • a roller as claimed in claim 1 including a plurality of axial openings in the end walls of the hollow cylindrical segment of said axle to release compressed air into a gap space between each end wall and the adjacent annular face plate of the roller shell.
  • a roller as claimed in claim 1 including means to control the air pressure in said pressure chamber formed by said enlarged axle segment.
  • a roller as claimed in claim 5 including at least two pressure lines connected to said pressure chamber to supply air at different pressures and means to selectively switch said pressure chamber to each of said pressure lines.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US00269457A 1971-07-09 1972-07-06 Air-supported thread overrun roller Expired - Lifetime US3746233A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2134247A DE2134247A1 (de) 1971-07-09 1971-07-09 Luftgelagerte fadenueberlaufrolle

Publications (1)

Publication Number Publication Date
US3746233A true US3746233A (en) 1973-07-17

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ID=5813155

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Application Number Title Priority Date Filing Date
US00269457A Expired - Lifetime US3746233A (en) 1971-07-09 1972-07-06 Air-supported thread overrun roller

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US (1) US3746233A (OSRAM)
DE (1) DE2134247A1 (OSRAM)
FR (1) FR2145976A5 (OSRAM)
GB (1) GB1344782A (OSRAM)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951474A (en) * 1974-03-08 1976-04-20 The Garrett Corporation Intershaft foil bearing
US3977590A (en) * 1975-03-19 1976-08-31 Electronic Engineering Company Of California Cooled roller
US3994193A (en) * 1973-10-01 1976-11-30 Domtar Limited Air bearing slitter
US4098115A (en) * 1976-01-14 1978-07-04 Bayer Aktiengesellschaft Yarn tension measuring device
US5224641A (en) * 1990-08-23 1993-07-06 Storage Technology Corporation Air bearing for tape drive
US5246155A (en) * 1991-05-28 1993-09-21 Koenig & Bauer Aktiengesellschaft Air supported web guide roller with end seal covers
US5575142A (en) * 1990-09-21 1996-11-19 Barmag Ag Method of automatically servicing winding apparatus in multi-station textile machines
EP0686781A3 (de) * 1994-05-10 1996-11-20 Gross Heinz Dr Ing Rolle zur Unterstützung, Umlenkung oder zum Transport von Materialien
WO2000061481A1 (en) * 1999-04-09 2000-10-19 Martin Automatic Inc. Improved web-handling roller
EP1207315A1 (en) * 2000-11-15 2002-05-22 Westwind Air Bearings Limited Air bearing
US20030114283A1 (en) * 2001-12-05 2003-06-19 Georg Kaluza Guide roller for a stamping machine
WO2006092237A1 (de) * 2005-03-01 2006-09-08 Oerlikon Textile Gmbh & Co. Kg Aufspulmaschine
WO2013098680A1 (en) * 2011-12-29 2013-07-04 Lakshmi Machine Works Ltd. An improved sliver guide arrangement in a textile machine
ES2429241R1 (es) * 2012-04-20 2014-03-14 Universidade Da Coruña Cojinete de levitación fluídica.
CN116292630A (zh) * 2023-04-04 2023-06-23 中国工程物理研究院机械制造工艺研究所 一种全狭缝节流静压气体支承径向止推轴承

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129065B (en) * 1982-10-27 1985-11-13 Kodak Ltd Fluid bearing idler roller
DE3939004A1 (de) * 1989-11-25 1991-05-29 Kugelfischer G Schaefer & Co Luftgelagerte verlegerolle

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3063041A (en) * 1958-08-19 1962-11-06 Ibm High speed reaction drum

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3063041A (en) * 1958-08-19 1962-11-06 Ibm High speed reaction drum

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994193A (en) * 1973-10-01 1976-11-30 Domtar Limited Air bearing slitter
US3951474A (en) * 1974-03-08 1976-04-20 The Garrett Corporation Intershaft foil bearing
US3977590A (en) * 1975-03-19 1976-08-31 Electronic Engineering Company Of California Cooled roller
US4098115A (en) * 1976-01-14 1978-07-04 Bayer Aktiengesellschaft Yarn tension measuring device
US5224641A (en) * 1990-08-23 1993-07-06 Storage Technology Corporation Air bearing for tape drive
US5575142A (en) * 1990-09-21 1996-11-19 Barmag Ag Method of automatically servicing winding apparatus in multi-station textile machines
US5246155A (en) * 1991-05-28 1993-09-21 Koenig & Bauer Aktiengesellschaft Air supported web guide roller with end seal covers
EP0686781A3 (de) * 1994-05-10 1996-11-20 Gross Heinz Dr Ing Rolle zur Unterstützung, Umlenkung oder zum Transport von Materialien
WO2000061481A1 (en) * 1999-04-09 2000-10-19 Martin Automatic Inc. Improved web-handling roller
US6641513B1 (en) * 1999-04-09 2003-11-04 Martin Automatic Inc. Web-handling roller
EP1207315A1 (en) * 2000-11-15 2002-05-22 Westwind Air Bearings Limited Air bearing
US20030114283A1 (en) * 2001-12-05 2003-06-19 Georg Kaluza Guide roller for a stamping machine
EP1318017A3 (de) * 2001-12-05 2004-09-22 Leonhard Kurz GmbH & Co. KG Umlenkrolle für eine Prägemaschine
US7097604B2 (en) 2001-12-05 2006-08-29 Leonard Kurz Gmbh & Co.,Kg Guide roller for a stamping machine
WO2006092237A1 (de) * 2005-03-01 2006-09-08 Oerlikon Textile Gmbh & Co. Kg Aufspulmaschine
CN101128377B (zh) * 2005-03-01 2011-07-20 欧瑞康纺织有限及两合公司 络筒机
WO2013098680A1 (en) * 2011-12-29 2013-07-04 Lakshmi Machine Works Ltd. An improved sliver guide arrangement in a textile machine
ES2429241R1 (es) * 2012-04-20 2014-03-14 Universidade Da Coruña Cojinete de levitación fluídica.
CN116292630A (zh) * 2023-04-04 2023-06-23 中国工程物理研究院机械制造工艺研究所 一种全狭缝节流静压气体支承径向止推轴承

Also Published As

Publication number Publication date
DE2134247A1 (de) 1973-01-18
FR2145976A5 (OSRAM) 1973-02-23
GB1344782A (en) 1974-01-23

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