WO2005011910A1 - Passage tournant pour lubrification minimale - Google Patents

Passage tournant pour lubrification minimale Download PDF

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Publication number
WO2005011910A1
WO2005011910A1 PCT/EP2004/008019 EP2004008019W WO2005011910A1 WO 2005011910 A1 WO2005011910 A1 WO 2005011910A1 EP 2004008019 W EP2004008019 W EP 2004008019W WO 2005011910 A1 WO2005011910 A1 WO 2005011910A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
rotor
gas
feed device
cavity
Prior art date
Application number
PCT/EP2004/008019
Other languages
German (de)
English (en)
Inventor
Eberhard Grimm
Original Assignee
Deublin Gmbh
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 Deublin Gmbh filed Critical Deublin Gmbh
Priority to DE212004000027U priority Critical patent/DE212004000027U1/de
Publication of WO2005011910A1 publication Critical patent/WO2005011910A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/10—Arrangements for cooling or lubricating tools or work
    • B23Q11/1015—Arrangements for cooling or lubricating tools or work by supplying a cutting liquid through the spindle
    • B23Q11/103—Rotary joints specially adapted for feeding the cutting liquid to the spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/10—Arrangements for cooling or lubricating tools or work
    • B23Q11/1038—Arrangements for cooling or lubricating tools or work using cutting liquids with special characteristics, e.g. flow rate, quality
    • B23Q11/1046—Arrangements for cooling or lubricating tools or work using cutting liquids with special characteristics, e.g. flow rate, quality using a minimal quantity of lubricant
    • 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
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/02—Sliding-contact bearings
    • F16C29/025—Hydrostatic or aerostatic
    • 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
    • F16C32/0603—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 supported by a gas cushion, e.g. an air cushion
    • F16C32/0614—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 supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings
    • F16C32/0618—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 supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings via porous material
    • 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
    • F16N—LUBRICATING
    • F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
    • F16N7/12—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with feed by capillary action, e.g. by wicks
    • 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
    • F16N—LUBRICATING
    • F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
    • F16N7/30—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated the oil being fed or carried along by another fluid
    • F16N7/32—Mist lubrication
    • 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
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/39—General buildup of machine tools, e.g. spindles, slides, actuators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the invention relates to a feed device for minimum quantity lubrication for a rapidly rotating spindle or shaft.
  • Rapidly rotating spindles have a speed of the order of 9,000 to 30,000 or even 40,000 rpm.
  • Metering devices for dispensing small amounts of lubricant are known.
  • the invention therefore has to do with a rotary union for minimal quantity lubrication.
  • a rotating union is characterized by a fixed or stationary and a rotating part of the device, which must be sealed against each other. At very high speeds of the device part special bearings with labyrinth sealing effect are often used, which is expensive.
  • a rotary unit with a shrunk-on graphite seal is known from EP 0 388 118 A2.
  • Rotary unions in connection with a lubrication system are also known from other publications (DE 196 30 929 C2, DE 198 20 362 AI, DE 197 51 834 AI, DE 196 32 472 AI, DE 38 44 662 AI, DE 296 09 023 Ul), where there is no gas storage.
  • Gas bearings for fast rotating shafts are known per se.
  • DE 196 37 598 C2 shows two aerostatic bearings, each consisting of a graphite bearing body and an overpressed aluminum bushing, each of which is supplied with compressed air that is sealed by O-rings. A rotating union is not provided.
  • Another gas bearing JP 11-303 870 A) uses porous graphite and glassy carbon to form the bearing body to which compressed air is supplied. There is no rotary feedthrough, especially no feed device for minimal quantity lubrication for a rapidly rotating spindle.
  • the invention has for its object to provide a feed device for minimum quantity lubrication for a rapidly rotating spindle or shaft, which requires little technical effort.
  • the feed device represents a rotary feedthrough for the lubricating flow, which is provided by a metering device is delivered and delivers this minimal lubricating flow to the inside of a shaft or spindle, from where the lubricating flow arrives at its destination.
  • a bearing housing is provided with connections for a gaseous medium, usually compressed air, and for a fluid lubricant, usually oil.
  • the bearing housing has a bearing bore that defines a bearing axis along which a rotating lubrication lance extends, which is constructed from a rotor with a dispensing tube for the lubricant.
  • a bearing sits in the bearing bore to support the rotating rotor.
  • This bearing contains a gas bearing body, usually made of porous carbon (graphite), to which the gaseous medium is supplied in order to create an air or gas cushion between the gas bearing body and the rotor.
  • a gas bearing body usually made of porous carbon (graphite)
  • the gas cushion is able to carry the rotor with its donor tube in a floating or floating manner.
  • the air or gas cushion forms a gas barrier, which seals the inside of the rotating union from the outside, ie the
  • the porous gas bearing body is acted on via a distribution groove.
  • the air or the gas flows through the pores of the gas bearing body into the bearing gap between the gas bearing body and the outer circumference of the rotor. Gas / air that escapes from the upholstery sometimes gets inside the
  • the fluid lubricant is fed to the feed device along the bearing axis into a cavity of the rotor, and An elastomer bushing is provided for sealing purposes, which delimits the lubricant connection from the bearing area with the gas cushion.
  • the supply device expediently has, as a connection for gaseous medium, a control channel for the air cushion and a compressed air connection for an air channel into the interior of the spindle.
  • the compressed air connection serves to create a carrier flow for supplied lubricant, so that the metered minimum amount of lubricant can reach its intended lubrication point.
  • the compressed air can also reach the air cushion via the gas bearing body or porous carbon body, in particular also because the distribution groove can be helical and is connected to the inside of the bearing housing, where the compressed air connection also opens. If the lubricant inlet and the compressed air connection are operated intermittently, there are times when the spindle rotates but there is no oil lubrication, which is why it is called a dry-running cycle. The control channel has been created for the case of such a dry running cycle, so that regardless of the compressed air connection, air is available for the air cushion on which the rotor floats or hovers.
  • the dispenser tube could run empty; In order to avoid this, a check valve is arranged at the feed end of the donor tube.
  • the dispensing tube extends between the rotor and the inside of the spindle to the point at which the lubricant is to be dispensed.
  • At the end of the dispenser tube inside the spindle there is an oil droplet dispenser or atomizer nozzle which releases the lubricant into the air flow that flows through the supplied compressed air is generated. Since the compressed air first arrives in the device-fixed bearing housing, but is supposed to flow through the rapidly rotating spindle, a seal between the device-fixed part and the rotating part is necessary.
  • the sealing technology is freely selectable, however two sealing rings sliding on each other are preferred.
  • FIG. 1 shows a longitudinal section through the feed device
  • FIG. 2 shows a view according to arrow A on the feed device
  • FIG. 3 shows a detail according to section B-B in FIG. 1.
  • the main parts of the feed device are a bearing housing 1, a rotor 2, a bearing 3 and a sealing device 4 between the feed device and a rapidly rotating spindle 5, which means any rapidly rotating machine part.
  • the overall arrangement is essentially symmetrical to the axis of rotation 6-6.
  • the bearing housing 1 encloses a cavity 10 and comprises a bearing plate 11 and a tubular bearing body 12.
  • the bearing plate 11 has a bearing bore 13 which receives the bearing 3, a compressed air connection 14, a compressed air control channel 15 and a lubricant connection 16.
  • the lubricant connection 16 is surrounded by an assembly area 17 (FIG. 2), to which the metering device for minimum quantity lubrication is fastened, which can be of a known construction.
  • the tubular bearing body 12 has a receiving bore 18 for the end of the spindle 5 and for the Sealing device 4.
  • the two housing parts 11, 12 are screwed together in a sealing manner.
  • a relief channel 19 leads out of the area of the bearing bore 13.
  • the rotor 2 comprises a hardened and ground sleeve 21 and a donor tube 22, which enclose an axial cavity 20.
  • a check valve 23 which allows lubricant to enter the cavity 20, but allows the return flow to it
  • Lubricant connection 16 blocks.
  • Tool holder and tool have a delivery channel for oil-air mixture in order to bring this to the machining point.
  • the axial displacement of the rotor 2 is limited by a star 26, which is soldered to the donor tube 22 and is seated in a cavity 50 of the spindle 5. Vibrations of the donor tube 22 are prevented by support inserts 27.
  • the bearing 3 comprises a gas bearing body 31 made of porous carbon and an elastomer bushing 32. Between the outer circumference of the gas bearing body 31 and the bearing bore 13, a helical distribution channel 33 extends, which is fed by the compressed air control channel 15 with compressed air which passes through the pores of the Gas bearing body in the intermediate region between the gas bearing body 31 and sleeve 21 pushes in to form an air cushion 34 there.
  • the air cushion 34 is on the one hand with the interior 10 of the
  • the air cushion 34 thus forms a lock or sealing device for the interior 10 of the feed device.
  • the sealing device 4 is provided, which has a displaceable, otherwise device-fixed support sleeve 41 and a support sleeve 42 rotating with the spindle 5, at the ends of which opposing sealing rings 43, 44 are arranged.
  • the carrier sleeve 41 is sealed on the outer circumference by means of an annular seal 45 and the carrier sleeve 42 is sealed by means of cord rings 46.
  • Pins 47 fastened in the receiving bore 18 form a radial stop for the carrier sleeve 41, so that the latter can move axially, but cannot rotate against the housing 1.
  • a spring 48 urges the carrier sleeve 41 into an axial stop position, which is shown on the right in FIG. 1 and in which a drainage path to a relief channel 49 is open. It is also possible to dispense with the outflow position of the sealing rings 43, 44 and to keep the sealing rings constantly pressed against one another (for example by using tension springs instead of the compression spring 48).
  • the device operates as follows: To build up the air cushion 34, in particular during a dry-running cycle, the compressed air control line 15 is acted on, so that compressed air is supplied to the outer circumference of the porous carbon body 31, which is distributed through the distribution channel 33 and through the pores of the carbon body into the space between the barrel body 21 and the carbon body 31 to build up the air cushion 34 thereon, on which the rotor 2, which rotates together with the spindle 5, floats or floats.
  • lubricant is pumped via a connection device 16 into the interior 20 of the rotor 2, and at the same time compressed air is supplied to the connection 14, which passes through the interior 10 of the device flows along the tube 22 and carries atomized lubricant as a mist with the nozzle 25.
  • the compressed air supplied has 4 to 6 bar, ie a compressed air blast forms, which leads to the sleeve 41 assuming its sealing position shown on the left in FIG. 1, in which the sealing rings 43 and 44 slide onto one another and thus seal.
  • the spring 48 brings about the position of the sealing rings 43/44 shown on the right in the drawing, so that residual air can then flow away via the relief duct 49.
  • the oil channel 16 is sealed by means of the elastomer seal 32, which represents a gap seal, but by means of the supplied oil or the like
  • Lubricant is permanently lubricated. The mixing of the two media, air and oil, in the area of the cushion 34 is avoided in that excess media are discharged to the atmosphere via the relief channel 19.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Dispersion Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

L'invention concerne un dispositif d'amenée d'une quantité minimale de lubrifiant pour une broche entraînée en rotation rapide, sous forme d'un passage tournant. Un boîtier de palier (1) présente des raccords (14, 15, 16) pour un fluide gazeux et pour un lubrifiant fluide, ainsi qu'un alésage du roulement (13) définissant un axe de palier (6). Un rotor (2) muni d'un tube distributeur (22) pour le lubrifiant, est monté mobile en rotation dans un palier (3) prenant appui dans l'alésage de roulement (13). Le palier (3) renferme un corps de coussinet (31) à couche de gaz, présentant une entrée (15, 33) pour le fluide gazeux, de manière à obtenir un matelas gazeux (34) entre le corps de coussinet (31) et le rotor (2), servant en même temps de moyen d'étanchéité pour l'intérieur du palier (10).
PCT/EP2004/008019 2003-08-01 2004-07-17 Passage tournant pour lubrification minimale WO2005011910A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE212004000027U DE212004000027U1 (de) 2003-08-01 2004-07-17 Drehdurchführung für Minimalmengenschmierung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20311890U DE20311890U1 (de) 2003-08-01 2003-08-01 Drehdurchführung für Minimalmengenschmierung
DE20311890.1 2003-08-01

Publications (1)

Publication Number Publication Date
WO2005011910A1 true WO2005011910A1 (fr) 2005-02-10

Family

ID=33521657

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/008019 WO2005011910A1 (fr) 2003-08-01 2004-07-17 Passage tournant pour lubrification minimale

Country Status (2)

Country Link
DE (1) DE20311890U1 (fr)
WO (1) WO2005011910A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006122743A1 (fr) * 2005-05-18 2006-11-23 Zf Friedrichschafen Ag Machine-outil comprenant un passage tournant entre une sortie de transmission et une broche
CN109571062A (zh) * 2018-10-26 2019-04-05 广州市昊志机电股份有限公司 一种小孔-多孔质节流组合式气浮主轴

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVI20060293A1 (it) * 2006-10-03 2008-04-04 Saccardo Elettromeccanica Srl Dispositivo atto ad addurre un fluido ad un utensile rotante e relativi testa porta utensile, mandarino ed elettromandrino
DE202009017656U1 (de) * 2009-12-28 2011-05-12 Aygün, Hakki Hochdruck-Minimalmengen-Schmiersystem
CN111779904B (zh) * 2020-06-04 2021-09-28 山东恒旺集团有限公司 一种挖掘机转动用液压旋转接头

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5669636A (en) * 1995-08-01 1997-09-23 Deublin Company Floating seal assembly for a bearingless coolant union having air rotation capability
US5800068A (en) * 1996-09-16 1998-09-01 Wanger; Gerhard Spindle for gas bearing of a rapidly rotating tool
DE19815134A1 (de) * 1998-04-01 1999-10-14 Bielomatik Leuze & Co Spindelkopf für Werkzeugmaschinen o. dgl.
JPH11303870A (ja) * 1998-04-17 1999-11-02 Ntn Corp 多孔質気体軸受及びこれを用いたスピンドル装置

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Publication number Priority date Publication date Assignee Title
DE3844662A1 (de) * 1988-11-11 1990-05-23 Ott Maschinentechnik Sicherung einer hohlwellenlagerung
US4928997A (en) * 1989-03-13 1990-05-29 Deublin Company Rotating union with carbon graphite labyrinthine seal
AT687U1 (de) * 1995-05-30 1996-03-25 Deublin Gmbh Anordnung zur einführung von druckmedien insbesondere in achsen oder wellen
JP2687110B2 (ja) * 1995-08-30 1997-12-08 ホーコス株式会社 工作機械の主軸装置
DE19538762C1 (de) * 1995-10-18 1997-04-10 Hueller Hille Gmbh Verfahren zur Kühlung und Schmierung eines spanend arbeitenden, rotierenden Werkzeuges mit geometrisch definierter Schneide und/oder des Werkstückes im Bearbeitungsbereich u. Bearbeitungsspindel zur Durchführung des Verfahrens
JPH10230434A (ja) * 1997-02-21 1998-09-02 Gat G Fuer Antriebstechnik Mbh 回転する機械部分に流体混合物を供給するための方法及び装置
DE19820362A1 (de) * 1998-05-07 1999-11-18 Gat Gmbh Vorrichtung zum Überführen eines Fluids
DE19835339A1 (de) * 1998-08-05 2000-02-17 Alfred Jaeger Luftlager, insbesondere für die Welle einer Motorspindel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5669636A (en) * 1995-08-01 1997-09-23 Deublin Company Floating seal assembly for a bearingless coolant union having air rotation capability
US5800068A (en) * 1996-09-16 1998-09-01 Wanger; Gerhard Spindle for gas bearing of a rapidly rotating tool
DE19815134A1 (de) * 1998-04-01 1999-10-14 Bielomatik Leuze & Co Spindelkopf für Werkzeugmaschinen o. dgl.
JPH11303870A (ja) * 1998-04-17 1999-11-02 Ntn Corp 多孔質気体軸受及びこれを用いたスピンドル装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 02 29 February 2000 (2000-02-29) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006122743A1 (fr) * 2005-05-18 2006-11-23 Zf Friedrichschafen Ag Machine-outil comprenant un passage tournant entre une sortie de transmission et une broche
US8016707B2 (en) 2005-05-18 2011-09-13 Zf Friedrichshafen Ag Machine tool comprising a rotary transmission leadthrough between the driven gear and the spindle
CN109571062A (zh) * 2018-10-26 2019-04-05 广州市昊志机电股份有限公司 一种小孔-多孔质节流组合式气浮主轴

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