EP3126669B1 - Hydraulische vorrichtung mit einem zusätzlichen schubabschnitt - Google Patents

Hydraulische vorrichtung mit einem zusätzlichen schubabschnitt Download PDF

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Publication number
EP3126669B1
EP3126669B1 EP15713886.8A EP15713886A EP3126669B1 EP 3126669 B1 EP3126669 B1 EP 3126669B1 EP 15713886 A EP15713886 A EP 15713886A EP 3126669 B1 EP3126669 B1 EP 3126669B1
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EP
European Patent Office
Prior art keywords
cylinder block
valve
shaft
additional section
assembly
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.)
Active
Application number
EP15713886.8A
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English (en)
French (fr)
Other versions
EP3126669A1 (de
Inventor
Clément Philippe RECOURA
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.)
Poclain Hydraulics Industrie
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Poclain Hydraulics Industrie
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Application filed by Poclain Hydraulics Industrie filed Critical Poclain Hydraulics Industrie
Publication of EP3126669A1 publication Critical patent/EP3126669A1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/22—Reciprocating-piston liquid engines with movable cylinders or cylinder
    • F03C1/223—Reciprocating-piston liquid engines with movable cylinders or cylinder having cylinders in star or fan arrangement, the connection of the pistons with an actuated element being at the inner ends of the cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/003—Reciprocating-piston liquid engines controlling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/10—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary
    • F04B1/113—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the inner ends of the cylinders
    • F04B1/1133—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the inner ends of the cylinders with rotary cylinder blocks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control

Definitions

  • the present invention relates to the field of hydraulic apparatus.
  • it relates to the associated means for enabling the coupling of such hydraulic devices.
  • a hydraulic apparatus 1 comprises a shaft 2, a cam 3 typically a multilobe cam, a cylinder block 4, an ice or distribution assembly 5 comprising a distributor 51 and a distributor cover 52, and a housing 6.
  • the cylinder block 4 is placed inside the ring forming the cam 3. It defines a plurality of cylinders 41 oriented radially with respect to an axis XX 'of rotation (see FIG. Figures 1a and 1b ) and opening on the outer peripheral face of the cylinder block 4 facing the cam 3.
  • a piston 42 is mounted to slide radially respectively in each of the cylinders 41. Each piston 42 bears on the radially inner surface of the cam 3.
  • the cylinder block 4 has a central bore through which it can be engaged on the end of the shaft 2 of the hydraulic apparatus 1.
  • the ice or dispensing assembly 50 is formed of a distributor 51 and a distributor cover 52 which are adapted to controllably apply a fluid under pressure successively to each of the pistons 42, more precisely in the internal chamber of the cylinders 41 adjacent to the pistons, so that the successive support of the pistons 42 on the lobes of the cam 3 causes the relative rotation of the cylinder block 4 and elements which are linked to it with respect to the cam 3.
  • the distributor 51 is rotatable along an axis collinear with X-X ', which is the axis of the shaft 2.
  • the ice or dispensing assembly 50 includes two chambers 511, 521 and 512, 522 receiving a fluid under high or low pressure depending on the mode of operation of the apparatus.
  • Hydraulic devices having a disengagement mechanism and push clutch, thus allowing a freewheel configuration, ie the hydraulic apparatus 1 operates without pressure (the pistons 42 therefore do not move back and forth at contact of the cam 3) and a working configuration, ie a configuration in which the hydraulic apparatus operates with a pressure and a fluid flow rate, the pistons 42 reciprocating in contact with the cam.
  • the dispensing assembly 50 supplies the cylinder block 4 with fluids under pressure. The seal between said cylinder block 4 and said dispensing assembly 50 is permitted without a seal thanks to a permanent contact between the two.
  • the distributor 51 then comes to press against the cylinder block 4 and thus allow the cylinder block 4 to engage the shaft 2.
  • the high pressure is between 400 and 500 bar typically.
  • the chambers 511, 521, and 512, 522 comprise two grooves 511 and 512 at the interface between the distributor 51 and the cover 52 for conveying the fluid, which cooperate with two complementary grooves 521 and 522 arranged in the dispenser cover 52 to form chambers or channels.
  • each channel can be low or high pressure and is adapted to be respectively connected to a hydraulic supply circuit 71, 72 (see figures 3a and 3b ).
  • Each circuit can be low or high pressure depending on the mode of operation.
  • the grooves 511 and 512 made in the distributor 51 each have a lateral wall on the side in the direction of the cylinder block 4. As mentioned above, the supply of fluid under low or high pressure will tend to move the distributor 51 towards the block. cylinders 4 under the effect of the force resulting from the pressure applied to these side walls.
  • the level of engagement of the cylinder block 4 on the shaft 2 depends directly on the pressure, said pressure being itself correlated to the torque of the apparatus 1.
  • the pressure applied to engage the cylinder block 4 on the shaft 2 is therefore not constant, which is not desirable for a clutch.
  • the feeding is provided by a pump 7 said pump booster, which ensures a minimum pressurization of the hydraulic circuits 71, 72.
  • the gavage pressure is of the order of the low pressure, that is to say typically about ten bars.
  • the objective is therefore to provide a new device for improving the engagement of the cylinder block 4 on the shaft 2.
  • the present invention aims to propose a system that does not have such disadvantages.
  • Another object of the invention relates to a hydraulic apparatus comprising a distribution assembly as previously described, said assembly allowing in particular the engagement of said cylinder block on said shaft.
  • FIG 2a shows a partial sectional view of a hydraulic apparatus and a dispensing assembly according to one embodiment of the invention.
  • the axis of rotation XX 'of the hydraulic apparatus and a radial axis YY' are represented on the Figures 2a and 2b .
  • the elements common with the state of the art previously described have the same names and alphanumeric references.
  • one of the embodiments of the clutch system consists in translational engagement of the cylinder block 4 on the shaft 2.
  • a distribution plane 53 is defined between the distributor 51 and the cylinder block 4, corresponding to the faces of the distributor 51 and the cylinder block 4 adapted to be brought into contact with one another.
  • the sealing is ensured by the particular configuration of the grooves 511 and 512 which ensures a self-maintenance between the cylinder block 4 the distributor 51.
  • the distributor cover 52 is typically fixed and integral with the casing 6 and in particular fixed in translation along the axis X-X '. Alternatively, the distributor cover 52 can form a single piece with the housing 6.
  • An additional section 54 is added between the distributor 51 and the cover 52.
  • This additional section 54 is a volume in which a fluid under pressure can circulate.
  • a first inner wall 541 of said additional section is constituted by the distributor 51 and a second inner wall 542 is constituted by the cover 52.
  • the surface of the first wall 541 is substantially perpendicular to the shaft 2 and is the largest possible.
  • the additional section 54 is preferably located wholly or partly radially outwardly of the channels 511, 521 and 512, 522 along the Y-axis Y '. Indeed, since the assembly is generally cylindrical in revolution about the axis X-X ', the further the additional section 54 is located radially, the greater the area of the first wall 541 of the additional section 54 may be important .
  • the additional section is preferably longitudinally located between the cylinder block 4 and the two chambers 511, 521, 512, 522.
  • Sealing means 543 are also provided, such as seals, for sealing the additional section 54 for receiving a fluid under pressure.
  • the additional section 54 is S-shaped or Z-shaped. Such a shape makes it possible to optimize the volume gain and makes it possible to house gaskets 543 by axial sliding.
  • the additional section 54 is rectilinear.
  • the additional section 54 is intended to be supplied with a pressurized fluid via a feed channel 55 positioned in the dispenser cover. Thanks to the surface of the first wall 541, the pressurized fluid exerts a collinear force to the axis XX 'on the distributor 51.
  • the distributor 51 being in contact with the cylinder block 4 by the contact surface 53, the force is transmitted to the cylinder block 4 which engages on the shaft 2.
  • the additional section is supplied by the lower pressure of the two hydraulic supply circuits 71, 72.
  • the two hydraulic circuits 71, 72 can be low or high pressure depending on the operating mode of the apparatus hydraulic 1.
  • the two hydraulic supply circuits 71, 72 are connected to a selector 9, said selector 9 being connected to the additional section 54 via the supply channel 55.
  • the selector 9 is adapted to select the lowest pressure between both circuits hydraulic feed 71, 72.
  • the inputs of the selector 9 are connected to the two hydraulic circuits 71, 72 which can each be high and low pressure.
  • the output of the selector 9 is connected to the supply channel 55.
  • the selector 9 is an open-center selector: in fact, in particular at the start of the hydraulic apparatus, the two hydraulic circuits 71, 72 are put to a feeding pressure by the pump 7 called the booster pump, schematically represented ( figures 3a and 3b ) as a hydraulic pump.
  • the pressures in the two hydraulic circuits 71, 72 being at this time almost equivalent, the selector 9 open center will supply the additional section 54 from the start of the hydraulic device 1.
  • the supply duct 55 connects the selector 9 to the additional section 54.
  • said supply duct 55 is advantageously all or part at least in another plane than the additional section 54 (duct). feed 55 shown dotted on the figure 2b ).
  • the additional section 54 is directly supplied by the booster pump 7 via the supply channel 55.
  • the hydraulic devices 1 concerned are typically radial pistons 42 and multilobe cam 3.
  • the pistons 42 are kept in contact with the cam 3 by thrust springs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Claims (11)

  1. Verteilerbaugruppe (50) einer hydraulischen Radialkolbenvorrichtung (1), wobei die Vorrichtung einen Zylinderblock (4) umfasst, der durch Translation in eine Welle (2) eingreifen kann, wobei die Baugruppe (50) umfasst:
    - einen Verteiler (51), der sich mit dem Zylinderblock (4) in Kontakt befindet,
    - einen Verteilerdeckel (52),
    - eine erste (541) und eine zweite (542) Kammer, die jeweils von einem ersten (511, 521) und einem zweiten (512, 522) Volumen definiert werden, die an der Grenzfläche zwischen dem Verteiler (51) und dem Verteilerdeckel (52) liegen, und für die Druckfluide bestimmt sind, die die Umwandlung von mechanischer Arbeit in Druck ermöglichen,
    wobei die Baugruppe (50) dadurch gekennzeichnet ist, dass sie einen zusätzlichen Abschnitt (54) umfasst, der von einem dritten Volumen (541, 542) definiert wird, das an der Grenzfläche zwischen dem Verteiler (51) und dem Verteilerdeckel (52) liegt, wobei der Abschnitt (54) dazu bestimmt ist, ein Druckfluid aufzunehmen, um das Eingreifen des Zylinderblocks (4) in die Welle (2) zu ermöglichen.
  2. Verteilerbaugruppe (50) nach Anspruch 1, wobei der zusätzliche Abschnitt (54) ganz oder zum Teil radial außerhalb der ersten (511, 521) und zweiten (512, 522) Kammer liegt, sodass die Oberfläche des zusätzlichen Abschnitts (54) größer ist.
  3. Verteilerbaugruppe (50) nach einem der Ansprüche 1 bis 2, wobei die Versorgung des zusätzlichen Abschnitts (54) durch Auswahl zwischen dem niedrigsten Druck zwischen den zwei Drücken erfolgt, die sich auf die erste (511, 521) und zweite (512, 522) Kammer beziehen.
  4. Verteilerbaugruppe (50) nach dem vorstehenden Anspruch, wobei die Verteilerbaugruppe einen Niederdruckwähler (9) mit offener Mitte umfasst, der dafür geeignet ist, die Auswahl zwischen dem niedrigsten Druck zwischen den zwei Drücken vorzunehmen, die sich auf die erste (511, 521) und zweite (512, 522) Kammer beziehen.
  5. Verteilerbaugruppe (50) nach einem der vorstehenden Ansprüche, wobei der zusätzliche Abschnitt (54) nicht radial geradlinig, sondern typischerweise S- oder Z-förmig ist, um das Volumen und die Dichtigkeit zu optimieren.
  6. Hydraulische Vorrichtung (1), umfassend ein Gehäuse (6), einen Zylinderbrock (4) und eine Welle (2), in die der Zylinderbrock (4) geeignet ist, durch Längstranslation einzugreifen, dadurch gekennzeichnet, dass sie weiter eine Baugruppe (50) nach einem der vorstehenden Ansprüche umfasst, wobei die Baugruppe (50) insbesondere das Eingreifen des Zylinderblocks (4) in die Welle (2) ermöglicht.
  7. Hydraulische Vorrichtung (1) nach dem vorstehenden Anspruch, wobei der Verteilerdeckel (52) und das Gehäuse (6) fest miteinander verbunden sind oder ein einziges Stück bilden.
  8. Hydraulische Vorrichtung (1) nach dem vorstehenden Anspruch, wobei das Eingreifen des Zylinderblocks (4) in die Welle (2) Teil eines Ein- und Ausrücksystems ist.
  9. Hydraulische Vorrichtung (1) nach einem der Ansprüche 6 bis 8, wobei die Vorrichtung (1) mit Radialkolben (42) und Mehrfachnocke (3) ist.
  10. Hydraulische Vorrichtung (1) nach dem vorstehenden Anspruch, wobei die Kolben (42) durch Schubfedern mit der Nocke (3) in Kontakt gehalten werden.
  11. Eingriffsverfahren eines Zylinderblocks (4) einer hydraulischen Vorrichtung (1) in eine Welle (2) mithilfe einer Verteilerbaugruppe nach einem der Ansprüche 1 bis 8, wobei:
    a. der zusätzliche Abschnitt (54) durch ein Fluid mit Druck beaufschlagt wird,
    b. der Verteiler (51) im Anschluss an die Druckbeaufschlagung durch ein Fluid des zusätzlichen Abschnitts (54) belastet wird,
    c. der Verteiler (51) den Zylinderblock (4) für das Eingreifen des Zylinderblocks (4) in die Welle (2) durch Kontakt belastet.
EP15713886.8A 2014-04-02 2015-04-01 Hydraulische vorrichtung mit einem zusätzlichen schubabschnitt Active EP3126669B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1452924A FR3019594B1 (fr) 2014-04-02 2014-04-02 Section additionnelle de poussee
PCT/EP2015/057182 WO2015150456A1 (fr) 2014-04-02 2015-04-01 Appareil hydraulique avec section additionnelle de poussee

Publications (2)

Publication Number Publication Date
EP3126669A1 EP3126669A1 (de) 2017-02-08
EP3126669B1 true EP3126669B1 (de) 2019-08-21

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EP15713886.8A Active EP3126669B1 (de) 2014-04-02 2015-04-01 Hydraulische vorrichtung mit einem zusätzlichen schubabschnitt

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US (1) US10527022B2 (de)
EP (1) EP3126669B1 (de)
FR (1) FR3019594B1 (de)
WO (1) WO2015150456A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3045734B1 (fr) 2015-12-21 2020-01-03 Poclain Hydraulics Industrie Machine hydraulique a pistons radiaux comprenant un ressort d'activation d'embrayage
FR3050773B1 (fr) 2016-04-28 2018-05-11 Poclain Hydraulics Industrie Machine hydraulique debrayable et vehicule equipe d'une telle machine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2611816B1 (fr) * 1987-02-25 1989-07-13 Poclain Hydraulics Sa Mecanisme a fluide sous pression, moteur ou pompe, a plusieurs cylindrees
FR2651836B1 (fr) * 1989-09-14 1994-06-10 Poclain Hydraulics Sa Mecanisme, moteur ou pompe, a pistons supportant des rouleaux d'appui desdits pistons sur une came.
FR2892775B1 (fr) * 2005-10-27 2010-11-05 Poclain Hydraulics Ind Moteur hydraulique a pistons radiaux avec refroidissement du bloc-cylindres
FR2955903B1 (fr) * 2010-02-01 2012-03-16 Poclain Hydraulics Ind Sous-ensemble formant hydrobase pour moteurs hydrauliques et procede d'assemblage

Non-Patent Citations (1)

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Also Published As

Publication number Publication date
FR3019594B1 (fr) 2016-04-08
FR3019594A1 (fr) 2015-10-09
US10527022B2 (en) 2020-01-07
EP3126669A1 (de) 2017-02-08
US20170022965A1 (en) 2017-01-26
WO2015150456A1 (fr) 2015-10-08

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