WO2018086822A1 - Circuit hydrodynamique - Google Patents

Circuit hydrodynamique Download PDF

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Publication number
WO2018086822A1
WO2018086822A1 PCT/EP2017/076273 EP2017076273W WO2018086822A1 WO 2018086822 A1 WO2018086822 A1 WO 2018086822A1 EP 2017076273 W EP2017076273 W EP 2017076273W WO 2018086822 A1 WO2018086822 A1 WO 2018086822A1
Authority
WO
WIPO (PCT)
Prior art keywords
oil
valve
line
working space
shut
Prior art date
Application number
PCT/EP2017/076273
Other languages
German (de)
English (en)
Inventor
Rolf Brockmann
Mike Ludwig
Original Assignee
Voith Patent 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 Voith Patent Gmbh filed Critical Voith Patent Gmbh
Publication of WO2018086822A1 publication Critical patent/WO2018086822A1/fr

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
    • F16D33/00—Rotary fluid couplings or clutches of the hydrokinetic type
    • F16D33/06—Rotary fluid couplings or clutches of the hydrokinetic type controlled by changing the amount of liquid in the working circuit
    • F16D33/16—Rotary fluid couplings or clutches of the hydrokinetic type controlled by changing the amount of liquid in the working circuit by means arranged externally of the coupling or clutch
    • 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
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • 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
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • F16D2048/0209—Control by fluid pressure characterised by fluid valves having control pistons, e.g. spools
    • 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
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • F16D2048/0218—Reservoirs for clutch control systems; Details thereof
    • 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
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • F16D2048/0221—Valves for clutch control systems; Details thereof
    • 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
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • F16D2048/0257—Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
    • 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
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • F16D2048/0257—Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
    • F16D2048/0266—Actively controlled valves between pressure source and actuation cylinder
    • 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
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • F16D2048/0257—Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
    • F16D2048/0269—Single valve for switching between fluid supply to actuation cylinder or draining to the sump

Definitions

  • the invention relates to a hydrodynamic gear unit comprising a primary bladed impeller and a secondary bladed impeller, which are designed such that the two wheels are rotatably mounted and form a working space can be filled with oil, in which by forming a flow torque from the one impeller on the Other impeller can be transferred, further comprising an oil circuit with an oil reservoir, a supply line and a drain line, wherein the working space can be supplied via the supply line with oil and wherein the drain line oil can be removed from the working space.
  • Such hydrodynamic gear units are known for example as turbo couplings or as a retarder or as a converter.
  • the working space In order to control the torque transmission, the working space must be controlled filled with oil and emptied.
  • an emptying valve is provided in the drain line or in a connecting line between drain line and oil reservoir in the prior art.
  • DE 102004015706 A1 a hydrodynamic coupling is described, which can be emptied via an emptying valve in an additional connecting line between drain line and oil reservoir.
  • the disadvantage is that the time for emptying with such an arrangement is relatively long and that an additional line is necessary.
  • the object of the invention is now to develop such a transmission unit so that the emptying is faster and easier.
  • the object of the device is achieved by a gear unit according to claim 1. Further advantageous features of the embodiment according to the invention, which additionally improve the device, can be found in the corresponding subclaims.
  • the transmission unit according to the invention is characterized in that there is a shut-off valve in the supply line is that, and that the drain line and the supply line are connected to each other so that oil can circulate from the working space without having to be guided through the oil reservoir, wherein a control device is provided which is designed so that the shut-off valve is closed when The oil should be emptied from the working space in the oil reservoir.
  • shut-off valve between the connection point of the drain line is positioned with the supply line and the working space. This guarantees trouble-free emptying without the need for an additional line or valve.
  • the main advantage of the solution according to the invention is that is prevented by the closed shut-off valve in the supply line during the emptying process that further oil from the line and from the oil circuit is sucked by the rotation of the primary impeller in the working space.
  • the rotation also forces the oil out of the working space into the drainage pipe to the oil reservoir.
  • the work space is emptied much faster than it is possible via a commonly used additional line with quick drain valve on the drain side. In addition, this creates a short closed cycle.
  • Oil is understood here to mean any operating fluid, which can also be, for example, coolant or water.
  • the process is referred to, in which the empty or only partially filled working space is filled further and the amount of oil in the oil circuit is increased by additional oil from the oil reservoir.
  • the process is referred to, in which the level is reduced in the working space and oil is discharged from the oil circuit into the oil reservoir.
  • a fast emptying is particularly necessary if the braking effect of the retarder is no longer needed after use. This can be a existing brake element that fixes the secondary impeller, be spared. If the hydrodynamic gear unit is used as a clutch before a subsequent automated manual transmission, it is also advantageous if the hydrodynamic clutch can be emptied again as quickly as possible after the upshift to relieve the friction elements in the transmission.
  • a heat exchanger is present in the drain line and the oil circuit is designed so that the oil flows through the heat exchanger when emptying the working space.
  • the heat exchanger is necessary in order to dissipate the heat generated during operation from the circulation.
  • the heat exchanger must be bypassed during emptying and the oil is discharged directly into the oil reservoir via an additional line, which is released by the emptying valve.
  • a common riser is present, which connects both the supply line and the drain line - ie the closed circuit - with the oil reservoir.
  • a common riser is present, which connects both the supply line and the drain line - ie the closed circuit - with the oil reservoir.
  • the supply line and the drain line in the region of the primary Lauftrades open into the working space, in particular so that the supply line in the radially inner region of the working space, ie approximately on the inner circumference and the drain line in the radially outer region of the working space opens at the outer periphery.
  • the pumping action is used by the rotation of the primary impeller for emptying and also for the oil circulation in a closed circuit.
  • the oil reservoir is designed so that the oil in an air pressure (py) can be impressed so that oil is pressed into the oil circuit.
  • the air pressure py determines the amount of oil in the oil circuit and thus the level in the working area. This makes it possible to regulate the function of the gear unit well.
  • the primary impeller is rotatably connected to an input shaft and the secondary impeller rotatably connected via a freewheel with an output shaft in a rotational direction.
  • a clutch is preferably present, which can connect the input shaft and the output shaft in the closed state.
  • the hydrodynamic gear unit in the load path can be bypassed when it is not needed - for example, when the starting or shifting process has been completed.
  • the transmission unit may be designed as a start-up clutch-retarder unit for a vehicle. Where there is a brake element that can lock the secondary impeller on the housing. Especially with such arrangements, a fast emptying is important.
  • shut-off valve In order to control the shut-off valve as well as possible and quickly, it is preferably designed as a pneumatically actuated valve.
  • the shut-off valve is designed with a valve piston which has at least two, spaced one behind the other with spaced seals for separating oil and air.
  • the valve piston can be moved quickly and yet ensure a safe separation of air and oil.
  • the sealing effect is better and the valve piston still easy to move, so that the shut-off valve can close very quickly.
  • gaskets are: O-ring, radial shaft seal, quadring or piston ring.
  • the shut-off valve preferably has a cylinder liner or a valve housing, which encloses the valve piston and a Has oil discharge opening which is arranged so that it is closed and when the shut-off valve between the two seals.
  • the oil outlet opening is connected via a leakage line with the oil reservoir, so the leakage oil remains in the oil circuit. Furthermore, it is advantageous to carry out the shut-off valve with a valve piston which is wholly or at least predominantly made of plastic, and in particular has a piston surface made of plastic. The low weight allows the piston to move faster and also easier and cheaper to manufacture.
  • FIG.1 Schematic representation of a transmission unit according to the invention with oil circuit
  • FIG. 2 Schematic of another transmission unit according to the invention as a start-up clutch retarder unit for a vehicle
  • 1 shows a hydrodynamic transmission unit 1 which can be used, for example, as a clutch, in particular as a starting clutch for a vehicle.
  • the primary impeller 2 and the secondary impeller 3 form an approximately toroidal working space in which blades are arranged in the respective impellers so that when filled with oil torque can be transmitted from one to the other impeller.
  • the oil is supplied via the feed line 4 and the oil discharge via the drain line 5.
  • oil is forced out of the oil reservoir 7 via the riser 6 and the feed line 4 into the working space.
  • a pressure py is applied to the compressed air line 9, which acts on the oil sump in the oil reservoir 7.
  • the oil circulates through the closed circuit between inlet line 4 and outlet line 5 and is cooled in the heat exchanger 8.
  • the quick-stop valve 20 is pneumatically actuated via the compressed air line 22 so that it closes. This prevents that further oil is sucked from the line 4 and passes into the working space by the rotation effect of the impeller. Due to the rotation, the oil is simultaneously removed from the working space via the drain line 5 and the riser 6 into the oil reservoir. Thus, a fast and reliable emptying is possible even at higher speeds of the wheels.
  • FIG. 2 shows a structural sketch for a hydrodynamic transmission unit according to the invention, which is designed as a start-up clutch retarder unit.
  • the existing oil circuit is not shown here and can for example be designed as in the embodiment in Figure 1.
  • the primary impeller 2 is rotatably connected to the input shaft 14.
  • the secondary impeller 3 is connected via a freewheel with the output shaft 15.
  • the freewheel locks a rotational direction, so that there is a rotationally fixed connection, and releases the other direction of rotation, so that shaft and impeller can rotate independently of each other.
  • a coupling 1 1 and a torsion damper 13 is provided.
  • the clutch 1 1 serves as a lock-up clutch and connects input shaft 14 and output shaft 15, bypassing the hydrodynamic unit.
  • a brake element 10 is provided that the secondary impeller 3 can lock on the housing 16.
  • an automated manual transmission is usually present on the output side, which is not shown here. On the input side there is a connection to the drive motor.
  • the valve piston 23 has inter alia a piston surface 23a and a sealing surface 23b.
  • the sealing surface 23b closes the valve in the closed state; in the illustrated embodiment, it is conical.
  • the valve piston 23 is preferably made of plastic. Alternatively, only the sealing surface 23b may be made of plastic. This is particularly advantageous over the known valve piston made of steel or other metal with a rubberized sealing plate, as it is easier and cheaper to manufacture.
  • the piston 23 has two seals 24 and 25.
  • the two seals 24,25 are designed as round seals and spaced from each other, arranged one behind the other on the valve piston 23. They separate the air and the oil side particularly effectively.
  • the cylinder liner 27 serves as a valve housing. It has an oil discharge opening 26 which is positioned so that it always in the valve mounted in both the closed position and in the open position between the two seals 24, 25 is located. As a result, oil that has penetrated past the seal 24, be discharged without it can get on the air side. In operation, a leakage line is preferably connected to the oil outlet bore 26, which discharges the leakage oil into the oil reservoir.
  • the inventive design of the check valve 20 a reliable sealing effect can be achieved with good mobility of the piston 23 at the same time. Thus, a particularly good media separation between the oil side and air side can be realized on the shut-off valve.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • General Details Of Gearings (AREA)

Abstract

L'invention concerne une unité de transmission hydrodynamique (1) comprenant une roue mobile à aubes (2) primaire et une roue mobile à aubes (3) secondaire qui sont conçues de telle sorte que les deux roues mobiles (2, 3) sont montées de manière rotative et forment une chambre de travail pouvant être remplie d'huile, chambre de travail dans laquelle, par formation d'un écoulement, un couple peut être transmis d'une roue mobile à l'autre roue mobile, comprenant en outre un circuit d'huile comportant un réservoir d'huile (7), une conduite d'alimentation (4) et une conduite d'évacuation (5), la chambre de travail pouvant être alimentée en huile par le biais de la conduite d'alimentation (4) et de l'huile pouvant être évacuée de la chambre de travail par le biais de la conduite d'évacuation (5), une soupape d'arrêt (20) étant située dans la conduite d'alimentation (4), et la conduite d'évacuation (5) et la conduite d'alimentation (4) étant reliées l'une à l'autre de telle sorte que de l'huile puisse circuler à partir de la chambre de travail sans devoir être guidée à travers le réservoir d'huile (7) ; la soupape d'arrêt (20) étant positionnée entre la chambre de travail et le point de liaison de la conduite d'évacuation (5) à la conduite d'alimentation (4), et un dispositif de commande étant prévu, lequel est conçu de telle sorte que la soupape d'arrêt (20) est fermée lorsque l'huile doit être purgée hors de la chambre de travail dans le réservoir d'huile (7).
PCT/EP2017/076273 2016-11-14 2017-10-16 Circuit hydrodynamique WO2018086822A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016121720.4 2016-11-14
DE102016121720.4A DE102016121720A1 (de) 2016-11-14 2016-11-14 Hydrodynamischer Kreislauf

Publications (1)

Publication Number Publication Date
WO2018086822A1 true WO2018086822A1 (fr) 2018-05-17

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ID=60201534

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/076273 WO2018086822A1 (fr) 2016-11-14 2017-10-16 Circuit hydrodynamique

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Country Link
DE (1) DE102016121720A1 (fr)
WO (1) WO2018086822A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111318847A (zh) * 2020-03-25 2020-06-23 荆门诺恒科技有限公司 一种航空发动机实验滑车及焊接工艺

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1117635B (de) * 1954-07-28 1961-11-23 Voith Gmbh J M Verfahren zum Betrieb einer Hilfsmaschine, vorzugsweise eines Bremsluftkompressors, bei Antriebsanlagen mit Brennkraftmaschine, insbesondere in Schienentriebfahrzeugen, sowie Einrichtung zum Durchfuehren des Verfahrens
EP1217352A1 (fr) * 2000-12-20 2002-06-26 ABBPATENT GmbH Procédé et dispositif pour déterminer la fuite d'un joint de queue de soupape
DE10317405A1 (de) * 2003-04-15 2004-11-04 Daimlerchrysler Ag Kupplungsvorrichtung
DE102004015706A1 (de) 2004-03-29 2005-10-27 Voith Turbo Gmbh & Co. Kg Hydrodynamische Baueinheit und Verfahren zur Beschleunigung des Befüllvorganges einer hydrodynamischen Baueinheit
WO2006075938A1 (fr) * 2005-01-14 2006-07-20 Volvo Lastvagnar Ab Actionneur d'embrayage de vehicule
WO2016124380A1 (fr) * 2015-02-04 2016-08-11 Voith Patent Gmbh Circuit de fluide de travail d'une machine hydrodynamique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE509655C2 (sv) * 1994-02-11 1999-02-22 Luk Getriebe Systeme Gmbh Hydrodynamisk vridmomentomvanlare
DE10046830A1 (de) * 2000-08-30 2002-03-28 Voith Turbo Kg Hydrodynamisches Bauelement
DE102006050759A1 (de) * 2006-10-27 2008-05-08 Voith Turbo Gmbh & Co. Kg Verfahren zur Steuerung einer hydrodynamischen Kupplung in einer Anfahreinheit in einem Kraftfahrzeugantriebsstrang
DE102008034974B4 (de) * 2008-07-25 2016-09-01 Voith Patent Gmbh Verfahren zum Einstellen der Leistungsübertragung einer hydrodynamischen Maschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1117635B (de) * 1954-07-28 1961-11-23 Voith Gmbh J M Verfahren zum Betrieb einer Hilfsmaschine, vorzugsweise eines Bremsluftkompressors, bei Antriebsanlagen mit Brennkraftmaschine, insbesondere in Schienentriebfahrzeugen, sowie Einrichtung zum Durchfuehren des Verfahrens
EP1217352A1 (fr) * 2000-12-20 2002-06-26 ABBPATENT GmbH Procédé et dispositif pour déterminer la fuite d'un joint de queue de soupape
DE10317405A1 (de) * 2003-04-15 2004-11-04 Daimlerchrysler Ag Kupplungsvorrichtung
DE102004015706A1 (de) 2004-03-29 2005-10-27 Voith Turbo Gmbh & Co. Kg Hydrodynamische Baueinheit und Verfahren zur Beschleunigung des Befüllvorganges einer hydrodynamischen Baueinheit
WO2006075938A1 (fr) * 2005-01-14 2006-07-20 Volvo Lastvagnar Ab Actionneur d'embrayage de vehicule
WO2016124380A1 (fr) * 2015-02-04 2016-08-11 Voith Patent Gmbh Circuit de fluide de travail d'une machine hydrodynamique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111318847A (zh) * 2020-03-25 2020-06-23 荆门诺恒科技有限公司 一种航空发动机实验滑车及焊接工艺
CN111318847B (zh) * 2020-03-25 2021-06-29 荆门诺恒科技有限公司 一种航空发动机实验滑车及焊接工艺

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