WO2014123719A1 - Embrayage à friction de fluide - Google Patents

Embrayage à friction de fluide Download PDF

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Publication number
WO2014123719A1
WO2014123719A1 PCT/US2014/013315 US2014013315W WO2014123719A1 WO 2014123719 A1 WO2014123719 A1 WO 2014123719A1 US 2014013315 W US2014013315 W US 2014013315W WO 2014123719 A1 WO2014123719 A1 WO 2014123719A1
Authority
WO
WIPO (PCT)
Prior art keywords
friction clutch
housing
fluid
fluid friction
oil
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.)
Ceased
Application number
PCT/US2014/013315
Other languages
English (en)
Inventor
Thomas Buchholz
Frank Gerber
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.)
BorgWarner Inc
Original Assignee
BorgWarner Inc
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 BorgWarner Inc filed Critical BorgWarner Inc
Publication of WO2014123719A1 publication Critical patent/WO2014123719A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D35/00—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion
    • F16D35/02—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part
    • F16D35/021—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part actuated by valves
    • F16D35/022—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part actuated by valves the valve being actuated by a bimetallic strip
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D35/00—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion
    • F16D35/02—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part
    • F16D35/021—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part actuated by valves
    • F16D35/024—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part actuated by valves the valve being actuated electrically, e.g. by an electromagnet
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/02—Overheat protection, i.e. means for protection against overheating
    • F16D2300/021—Cooling features not provided for in group F16D13/72 or F16D25/123, e.g. heat transfer details
    • F16D2300/0214—Oil or fluid cooling

Definitions

  • the invention relates to a fluid friction clutch in accordance with the preamble of claim 1.
  • a fluid friction clutch of this type is known from EP 1 731 787 Bl, the content of disclosure of which is hereby made the content of disclosure of the present application by explicit reference.
  • an oil cooler improves the slip heat capacity with the aid of a cooling circuit which runs through the housing parallel to the main fluid circuit which connects the working chamber and the reservoir chamber.
  • This additional fluid circuit serves exclusively for the purpose of cooling the fluid, in particular oil, but has no function at all relating to the emptying of the working chamber.
  • the arrangement and/or position of the oil-cooler delivery pump causes said oil-cooler delivery pump to operate only when the system is situated in the range of medium slip heat, with the result that no further idling losses of the fluid friction clutch according to the invention are produced.
  • the oil cooler is preferably arranged in the cover of the housing.
  • the clutch performance can be improved further by virtue of the fact that a recirculating pump is provided which rotates at secondary or primary speed and strips off clutch fluid on account of its arrangement between the clutch plate and housing.
  • fig. 1 A shows a sectional illustration of a fluid friction clutch according to the invention from a first viewing direction
  • fig. IB shows a perspective, sectioned illustration of the fluid friction clutch according to fig. 1A
  • figs. 1C-1E show illustrations of an alternative embodiment of the fluid friction clutch according to the invention.
  • fig. 2 A shows an illustration, corresponding to fig. 1A, of the fluid friction clutch from a second viewing direction
  • fig. 2B shows an illustration, corresponding to fig. IB, of the fluid friction clutch from the viewing direction according to fig. 2 A,
  • fig. 3 shows a perspective plan view of the fluid friction clutch without housing cover
  • fig. 4 shows a partial illustration, corresponding to fig. 3, of the fluid friction clutch
  • fig. 5 shows a partial illustration, corresponding to fig. 4, of another region of the fluid friction clutch
  • fig. 6 shows a detailed illustration of a valve element which is shown in fig. 5
  • fig. 7 shows a first embodiment of a hydraulic circuit diagram for the fluid friction clutch according to the invention.
  • fig. 8 shows an illustration, corresponding to fig. 3, of a second embodiment of the hydraulic circuit diagram for the fluid friction clutch according to the invention.
  • Fig. 1A shows a sectional illustration of a fluid friction clutch 1 according to the invention which has a housing which is usually constructed from a housing body 2 and a cover 3.
  • a clutch plate 4 which can be rotated with respect to the housing 2, 3 is arranged in the housing 2, 3.
  • the clutch plate 4 which can be rotated with respect to the housing 2, 3 is arranged in a rotationally fixed manner at one end 5 of a shaft 6 which is mounted centrally within the housing 2, 3.
  • a drivable active element 7 which is shown diagrammatically in a slightly simplified form and can be configured, for example, as a fan wheel is fixed on the housing 2, 3.
  • a working chamber 9 is arranged between the housing 2, 3 and the clutch plate 4, which working chamber 9 has working gaps 15, as can be seen from fig. 1A, which make a transmission of torque possible on account of a shearing action on the clutch fluid which is fed to the working chamber 9.
  • a reservoir chamber 10 is provided for said clutch fluid, a feed channel 11a, l ib leading from the reservoir chamber 10 to the working chamber 9 and therefore forming the supply.
  • a return pump system or a recirculating pump 16 which serves to return clutch fluid from the working chamber 9 to the reservoir chamber 10.
  • Said recirculating pump is either formed by the centrifugal force which is produced and pumps fluid to the reservoir chamber 10 to the outside in order to evacuate the working chamber 9.
  • a separate component in the form of an active recirculating pump as is indicated diagrammatically in the hydraulic diagram of figs. 7 and 8, which acts via shearing force.
  • the fluid friction clutch 1 has a stationary clutch part 13 which can be rotated with respect to the housing 2, 3 and is preferably configured as a magnet, in particular an electromagnet.
  • an inner reservoir 18 is provided, furthermore, which is connected via the feed channel 11 to the reservoir chamber 10.
  • the valve 17 is connected into the feed channel 11a, l ib, and the reservoir chamber 10 is arranged so as to lie on the outside, as results in detail from figs. 1 A to 2B.
  • a non-return valve 19 is provided which is arranged between the valve 17 and the reservoir 18.
  • Said non-return valve 19 can be, for example, a small tube which protrudes beyond the fluid level into the reservoir 18.
  • a return valve 20 is provided which is operatively connected to the valve 17 and opens and closes a return channel 23 to the reservoir chamber 10.
  • the valve 17 which is preferably configured as a multiway valve has a valve element 24 which has a through bore 25 and a fluid inlet recess 26 for introducing fluid into the working chamber 9, which results above all from fig. 5 and the detailed illustration of fig. 6.
  • the actuator 27 can also be moved by a bimetallic strip (not shown) instead of the armature and the magnet.
  • the reservoir chamber 10 is provided on the secondary side of the fluid friction clutch 1 and the inner chamber 18 is provided on the primary side of the fluid friction clutch 1.
  • the fluid friction clutch 1 has a return bore 30 for pressure relief which connects the feed channel or feed channel section 11a via a further fluid inlet opening (not shown) of the valve 17 to the reservoir chamber 10.
  • no inner volume is provided, with the result that the oil is not conveyed back via the inner reservoir.
  • This embodiment of the fluid friction clutch 1 according to the invention can be used in relatively small clutch designs which do not require an inner volume, since the drag moments are low in said designs.
  • Figs. 1C to IE show a further embodiment of a fluid friction clutch 1 according to the invention. All components which correspond to those of figs. 1A and IB are labeled with the same designations, with the result that reference can be made to their description above.
  • the embodiment according to figs. 1C to IE is distinguished by the provision of an oil cooler 31.
  • the oil cooler 31 is arranged in the housing 2, 3, the illustration which is selected in figs. 1C to IE showing a particularly preferred embodiment, in which the oil cooler 31 is arranged in the cover 3.
  • the oil cooler 31 has first of all an oil-cooler delivery pump 32 which can be rotated with the housing, with the cover 3 in the case of the example, relative to the clutch plate 4, adjacently to which the oil-cooler delivery pump 32 is arranged, as results from figs. 1C to IE.
  • the oil-cooler delivery pump is arranged in the reservoir chamber 10.
  • the oil cooler 31 has an oil feed channel 33.
  • a first end 33 A of said oil feed channel is flow-connected to the oil-cooler delivery pump 32.
  • a second end 33B of the oil feed channel 33 is flow-connected to a first end 34A of an oil cooling channel 34.
  • said oil cooling channel 34 extends at least substantially transversely with respect to the longitudinal axis L of the fluid friction clutch 1 and runs through the entire cover 3 in this transverse direction in the case of the example which is shown.
  • the second end 34B of the oil cooling channel 34 is again flow-connected to the reservoir chamber 10.
  • this further flow connection to the reservoir chamber 10 is brought about via a feed channel 35 which adjoins the second end 34B.
  • the fluid circuit which is formed by the oil-cooler delivery pump 32, the oil feed channel 33 and the oil cooling channel 34 is formed parallel to the main actuation fluid circuit which connects the working chamber 9 and the reservoir chamber 10 to one another and has been explained using the preceding embodiment.
  • the oil cooler 31 acts only in the medium slip heat range of the fluid friction clutch 1 according to the invention, since the fluid or the oil can only reach the delivery pump 32 at all in this range, since there is a sufficient quantity of oil in the reservoir chamber 10 in this operating state in order to supply the delivery pump 32 with oil.
  • the oil-cooler delivery pump 32 pumps hot oil into the oil cooling channel 34, from which cooled oil is conveyed back into the working chamber 9.
  • Active element for example, im

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

La présente invention concerne un embrayage à friction de fluide (1) ayant un carter (2, 3) ; ayant une plaque d'embrayage (4) pouvant tourner par rapport au carter (2, 3) et disposée de façon à pouvoir tourner au niveau d'une extrémité (5) d'un arbre (6) fixé de façon centrale à l'intérieur du carter (2, 3) ; ayant une chambre de travail (9) entre le carter (2, 3) et la plaque d'embrayage (4) ; ayant une chambre de réservoir (10) pour le fluide d'embrayage ; et ayant un canal d'alimentation (11a, 11b) allant de la chambre de réservoir (10) à la chambre de travail (9), caractérisé par la présence d'un refroidisseur d'huile (31) comprenant les parties suivantes : une pompe de distribution de refroidisseur d'huile (32) pouvant tourner avec le carter (2, 3) par rapport à la plaque d'embrayage (4) et un canal d'admission d'huile (33) relié par écoulement, avec une extrémité (33A), à la pompe de distribution de refroidisseur d'huile (32) et, avec l'autre extrémité (33B), à une première extrémité (34A) d'un canal de refroidissement d'huile (34) s'étendant à travers le carter (2, 3), au moins essentiellement transversalement par rapport à son axe longitudinal (L) et dont les extrémités (34A et 34B) sont reliées par écoulement à la chambre de réservoir (10).
PCT/US2014/013315 2013-02-06 2014-01-28 Embrayage à friction de fluide Ceased WO2014123719A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013002186 2013-02-06
DE102013002186.3 2013-02-06

Publications (1)

Publication Number Publication Date
WO2014123719A1 true WO2014123719A1 (fr) 2014-08-14

Family

ID=51300046

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2014/013315 Ceased WO2014123719A1 (fr) 2013-02-06 2014-01-28 Embrayage à friction de fluide

Country Status (1)

Country Link
WO (1) WO2014123719A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021232034A1 (fr) 2020-05-14 2021-11-18 Horton, Inc. Système de commande de soupape pour embrayage à friction visqueux

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5992594A (en) * 1997-12-04 1999-11-30 Behr Gmbh & Co. Fluid friction clutch
US20090084650A1 (en) * 2005-07-29 2009-04-02 Horton, Inc. Electromagnetically Actuated Viscous Clutch
US20090127051A1 (en) * 2005-06-09 2009-05-21 Thomas Buchholz Fluid Friction Clutch
US7581627B2 (en) * 2006-05-18 2009-09-01 Behr America Viscous clutch with controlled drain back
WO2012024497A2 (fr) * 2010-08-19 2012-02-23 Horton, Inc. Ensemble de soupape d'embrayage visqueux

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5992594A (en) * 1997-12-04 1999-11-30 Behr Gmbh & Co. Fluid friction clutch
US20090127051A1 (en) * 2005-06-09 2009-05-21 Thomas Buchholz Fluid Friction Clutch
US20090084650A1 (en) * 2005-07-29 2009-04-02 Horton, Inc. Electromagnetically Actuated Viscous Clutch
US7581627B2 (en) * 2006-05-18 2009-09-01 Behr America Viscous clutch with controlled drain back
WO2012024497A2 (fr) * 2010-08-19 2012-02-23 Horton, Inc. Ensemble de soupape d'embrayage visqueux

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021232034A1 (fr) 2020-05-14 2021-11-18 Horton, Inc. Système de commande de soupape pour embrayage à friction visqueux
CN115516224A (zh) * 2020-05-14 2022-12-23 霍顿公司 用于粘滞摩擦离合器的阀控制系统
KR20230011933A (ko) * 2020-05-14 2023-01-25 호르톤 인코포레이티드 점성 마찰 클러치용 밸브 제어 시스템
EP4121666A4 (fr) * 2020-05-14 2024-04-17 Horton, Inc. Système de commande de soupape pour embrayage à friction visqueux
KR102810716B1 (ko) 2020-05-14 2025-05-21 호르톤 인코포레이티드 점성 마찰 클러치용 밸브 제어 시스템
CN115516224B (zh) * 2020-05-14 2025-10-17 霍顿公司 用于粘滞摩擦离合器的阀控制系统
AU2021271263B2 (en) * 2020-05-14 2025-10-23 Horton, Inc. Valve control system for viscous friction clutch

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