EP3190292A1 - Verteilvorrichtung für eine hydraulische maschine, und mit einer solchen vorrichtung ausgestattete hydraulische maschine - Google Patents

Verteilvorrichtung für eine hydraulische maschine, und mit einer solchen vorrichtung ausgestattete hydraulische maschine Download PDF

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Publication number
EP3190292A1
EP3190292A1 EP16197607.1A EP16197607A EP3190292A1 EP 3190292 A1 EP3190292 A1 EP 3190292A1 EP 16197607 A EP16197607 A EP 16197607A EP 3190292 A1 EP3190292 A1 EP 3190292A1
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EP
European Patent Office
Prior art keywords
distribution
distributor
bore
ducts
groove
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.)
Granted
Application number
EP16197607.1A
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English (en)
French (fr)
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EP3190292B1 (de
Inventor
Dominique Costaz
Loic BONNARD
Julien Viard
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Poclain Hydraulics Industrie
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Poclain Hydraulics Industrie
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Publication of EP3190292A1 publication Critical patent/EP3190292A1/de
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Publication of EP3190292B1 publication Critical patent/EP3190292B1/de
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Classifications

    • 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
    • F04B1/0404—Details or component parts
    • F04B1/0452—Distribution members, e.g. valves
    • 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
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/0447—Controlling
    • F03C1/0457—Controlling by changing the effective piston stroke
    • 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
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/0403—Details, component parts specially adapted of such engines
    • F03C1/0435—Particularities relating to the distribution members
    • 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
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/0403—Details, component parts specially adapted of such engines
    • F03C1/0415—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
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/0447—Controlling
    • F03C1/045—Controlling by using a valve in a system with several pump or motor chambers, wherein the flow path through the chambers can be changed, e.g. series-parallel
    • 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
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/047—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement the pistons co-operating with an actuated element at the outer ends of the cylinders
    • F03C1/0472—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement the pistons co-operating with an actuated element at the outer ends of the cylinders with cam-actuated distribution members
    • 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
    • F04B1/06—Control
    • F04B1/063—Control by using a valve in a system with several pumping chambers wherein the flow-path through the chambers can be changed, e.g. between series and parallel flow
    • 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
    • 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
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2035—Cylinder barrels
    • 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
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2064—Housings
    • 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
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/22—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons

Definitions

  • the present disclosure relates to a dispensing device for a hydraulic machine comprising a distributor which has distribution ducts opening into a radial dispensing face, as well as a counter-dispenser, one of the elements constituted by the distributor and by the counterpart -dispenser being fitted into the other of said elements, such that said elements have respective axial faces facing between which are provided a first and a second main enclosure, the device comprising means for selecting the cubic capacity able to define at least three separate operating displacements, selectively connecting the distribution ducts with a first or a second main duct, supply or exhaust via the main speakers.
  • the counter-distributor is a fixed part in rotation, through which the fluid passes, in particular for the supply or the exhaust, before reaching the distributor, which distributes this fluid between the different distribution ducts, which are in communication one after the other with the cylinders of the cylinder block of the hydraulic machine.
  • the counter-distributor is a housing part; for example, for a rotary crankcase and fixed cylinder block machine, the counter-distributor is a fixed core.
  • the document EP 0 284 460 discloses a pressurized fluid mechanism, motor or pump, having three displacement cylinders and whose distributor, which is an internal distributor, has a radial distribution face.
  • This mechanism comprises two displacement selectors, each arranged in the housing portion of the dispensing device and can be controlled separately.
  • This mechanism is satisfactory, but it has two disadvantages.
  • its radial size is important since it requires to be able to accommodate two drawers of displacement selection in two different bores, formed in the housing part of the dispensing device.
  • it requires a very specific distributor and counter-distributor, which must be specially provided for this mechanism, without being able either to be used as such for mechanisms having a single displacement or two displacements. .
  • the document FR 2 127 268 also discloses a hydraulic mechanism having three displacement cylinders.
  • a displacement selection device is disposed in the distributor, which is an internal distributor.
  • This mechanism comprises a drawer that can adopt three positions: a first position obtained by supplying fluid to a first control chamber, a second position obtained by feeding another control chamber opposite to the first, and a third position obtained without powering the chambers of command, but under the effect of a return spring.
  • This mechanism partially overcomes the problem previously mentioned since the displacement selection device is disposed in the internal distributor.
  • the geometry of the displacement drawer of the cubic capacity is complex.
  • the geometry of the distribution ducts made in the internal distributor is complex, so that these ducts open close to each other in the different regions of the bore in which moves the single cylinder selection drawer .
  • the distribution face is an outer axial face of the inner distributor, the latter being inserted as a core inside the cylinder block. Due to the complexity of the geometry of the distribution ducts, this mechanism does not seem compatible with a distributor having a radial distribution face. Consequently, this mechanism also requires a large radial space and, in fact, it can only be used for axial distribution face technology, which has certain disadvantages, particularly in terms of sealing between the axial distribution face and the axial face. communicating the cylinder block into which the cylinder ducts open to be placed in communication with the distribution ducts.
  • the invention relates to a dispensing device for a hydraulic machine comprising a distributor which has distribution ducts opening into a radial distribution face, and a counter-distributor, one of the elements constituted by the distributor and the counter distributor being fitted into the other of said elements, so that said elements have respective opposite axial faces between which are provided a first and a second main enclosure, the device comprising means for selecting the displacement capable of defining at least three distinct operating displacements, by selectively connecting the distribution ducts with a first or a second main duct, supply or exhaust, via the main speakers; in this device, the means for selecting the displacement comprise a first and a second slide disposed one after the other in a bore of one of the elements constituted by the distributor and the counter-distributor, bore which are connected to the main speakers and at least a portion of the distribution ducts, the drawers being configured to adopt at least three distinct configurations establishing different connections between the main ducts and the distribution ducts via the main speakers
  • two drawers are arranged in the same bore of the distributor or counter-distributor.
  • Each of these two drawers can itself be relatively small, and their respective orders are easy.
  • the part (counter-distributor or distributor) other than that in which this bore is formed, is not affected by the capacity selection means, so that one can use the same part "standard” for different types of hydraulic machines, with several displacements or not.
  • this device is compatible with a dispenser type "ice” in which the distribution face is radial, and is therefore in axial abutment against the communication face of the cylinder block, so as to ensure the desired seal. This device can therefore be used in hydraulic machines remaining radially compact, and for controlled production costs, while ensuring the required reliability.
  • the bore is axially arranged and the drawers are axially displaceable to define said distinct configurations.
  • the bore is formed in that of the elements constituted by the distributor and the counter-distributor which is fitted into the other of said elements.
  • the bore is central.
  • the internal distributor may generally have a symmetry of revolution about its axis, which is the axis of rotation of the rotor of the hydraulic machine equipped with the device.
  • the device comprises a spring disposed between the facing faces of the two drawers to permanently solicit a relative movement of the drawers, in particular a movement between the drawers from one another, and control means for controlling selectively a controlled displacement of each drawer in the opposite direction in the direction of said relative movement for the drawer in question.
  • the spring is disposed in an area of the bore connected to a leak return duct.
  • the device comprises a stop adapted to cooperate with the drawer in question, to limit the movement of this drawer in said opposite direction regardless of the position of the other drawer.
  • the considered displacements of the two drawers can be completely independent and one can obtain four relative positions, and thus four displacement cylinders, as will be indicated in the following.
  • control means comprise a first control chamber for the first spool and a second control chamber for the second spool, said control chambers being adapted to be supplied with fluid to selectively control said controlled displacement of each spool.
  • the hydraulic control means of the movements of the drawers may thus comprise only a first chamber associated with the first slide and a second chamber associated with the second slide, without requiring other hydraulic control chambers.
  • control chambers are arranged at the respective ends of the drawers opposite the spring.
  • the dispenser is fitted into the counter distributor which forms a housing part of the device.
  • the distributor then forms an internal distributor.
  • first and second drawers are respectively disposed in a first and a second section of the bore which each have a first distribution groove connected to the first main enclosure and a second distribution groove connected to the second main enclosure; the first and second sections of the bore each have a connecting groove adapted to be connected to one or other of the first and second distribution grooves of the section considered according to the position of the slide located in said section; and, among the distribution ducts, separate groups of distribution ducts are respectively connected to the connecting grooves and the distribution grooves.
  • the distributor is fixed in rotation, the bore is formed in the distributor, the first distribution grooves are interconnected by a first drilling of the distributor and the second distribution grooves are interconnected by a second drilling of the distributor.
  • the counter-distributor may be a standard part, suitable both for machines having more displacement than machines with a single displacement.
  • the distributor is fixed in rotation, the bore is formed in a housing part in which the distributor is fitted, and the first distribution grooves are interconnected by a first drilling of said housing portion and the second grooves of distribution are interconnected by a second drilling of said housing portion.
  • the distributor that may be a standard part, suitable both for machines having more displacement than machines with a single displacement.
  • first and second drawers are respectively disposed in a first and a second section of the bore which each have a first distribution groove connected to the first main conduit and a second distribution groove connected to the second main conduit, the first and second second sections of the bore each have a connecting groove adapted to be connected to one or the other of the first and second distribution grooves of the section considered according to the position of the slide located in said section and, among the distribution ducts separate groups of distribution ducts are respectively connected to the connecting grooves and the distribution grooves.
  • the distributor is rotatable, the bore is formed in the counter-distributor, which is fitted into the dispenser, the first distribution grooves are interconnected by a first hole of the counter-distributor connected to the first main conduit and the second The distribution grooves are interconnected by a second bore of the counter-distributor connected to the second main duct.
  • a first and a second secondary enclosure formed between the axial faces facing the distributor and the counter-distributor, are respectively connected to the first and the second connecting groove.
  • the connecting groove is located between the first and second distribution grooves, and each of the first and second drawers has a communication groove for communicating the connecting groove with the first or the second distribution groove according to the position of the drawer.
  • said distribution ducts are connected to the second main duct.
  • the aforementioned connections to the first and / or second main duct can be performed via the main speakers.
  • the distribution ducts of the second groups primary, secondary and tertiary are interconnected, regardless of the configuration of the drawers.
  • the distribution ducts of the first primary group are connected to the first distribution groove of at least one of the first and second sections of the bore
  • the distribution ducts of the second primary, secondary and tertiary groups are connected to the second distribution groove of at least one of the first and second sections of the bore
  • the distribution ducts of the first tertiary group are connected to the connecting groove of the first section
  • the distribution ducts of the first secondary group are connected to the connecting groove of the second section.
  • the distribution ducts of the first primary group comprise at least one duct opening into the first distribution groove of the first section of the bore and at least one duct opening into the first distribution groove of the second section of the bore
  • / or the distribution ducts of the second primary, secondary and tertiary groups comprise at least one duct opening into the second distribution groove of the first section of the bore and at least one duct opening into the second distribution groove of the second section of the bore.
  • the geometry of the distribution ducts in the internal distributor can be simplified since distribution ducts can open into different areas of the bore while having, as a function of the movements of the drawers, the same fluidic connections.
  • the hydraulic machine represented on the figure 1 is of the fixed casing and rotary cylinder block type. This is a hydraulic machine, motor or pump, with radial pistons.
  • This machine comprises a fixed housing in three parts 2A, 2B and 2C, assembled by screws 3.
  • a corrugated reaction cam 4 is formed on the part 2B of the housing.
  • the machine comprises a cylinder block 6 which is mounted in relative rotation about an axis 10 with respect to the cam 4 and which comprises a plurality of radial cylinders 12, which can be supplied with fluid under pressure and inside. of which are mounted sliding radial pistons 14.
  • the cylinder block 6 rotates a shaft 5 which cooperates with it by splines 7.
  • This shaft carries an outlet flange 9.
  • the machine further comprises a fluid distributor 16 which is secured to the housing with respect to the rotation about the axis 10.
  • the dispensing device comprises this distributor 16, which is in this case an internal distributor, and the housing portion 2C, in which is housed the internal distributor.
  • This crankcase portion 2C which is also referred to as a "dispensing cover”, forms a counter-dispenser within the meaning of this disclosure.
  • This part 2C can be of a block having a bell-shaped shape, or being closed at its axial end opposite to the cylinder block, by an attached plate.
  • the internal distributor 16 has a radial distribution face 16A, perpendicular to the axis 10, into which outlets distribution channels.
  • the internal distributor 16 also has an outer axial face 16B, which has a first main groove 18 and a second main groove 20, which serve respectively to supply and exhaust the fluid, or vice versa. It will be considered in the following that, in the preferred direction of operation of the engine, the groove 18 is a feed groove and the groove 20 is an exhaust groove.
  • the internal axial face 2C 'of the distribution cover 2C which faces the external axial face 16B of the distributor, has main grooves 18' and 20 'respectively facing the grooves 18 and 20.
  • grooves 18' and 20 communicating with main supply or exhaust pipes, respectively 1 and 2, which are drilled in the wall of the distribution cover 2C.
  • the grooves 18 'and 20' are the only grooves of the distribution cover 2C serving to supply or exhaust the fluid vis-à-vis the cylinders.
  • the dispensing cover is of standard type and, insofar as the displacement selector is disposed in the internal fluid distributor as will be seen later, it is not necessary that the distribution cover or the external axial face of the internal distributor has other main grooves to ensure the supply or the exhaust of the cylinders.
  • the capacity selection means comprises an axial bore 22, in this case a central bore relative to the axis 10, and two drawers, respectively 24 and 26, disposed in this bore.
  • This displacement selector also comprises a spring 28 disposed between the drawers 24 and 26.
  • the opposite faces of the drawers 24 and 26 have the recesses, respectively 24A and 26A, in which the opposite ends of the spring 28 are housed.
  • the spring 28 constantly urges a relative movement of the drawers. In the present case, it is a compression spring which is constantly tending to move the two drawers apart by tending to move the drawer 24 in the direction F2 and move the drawer 26 in the direction F1.
  • Distribution ducts are formed in the internal distributor 16.
  • Each distribution duct has an end that opens into the distribution face 16A for, during the relative rotation of the cylinder block and the cam, to be put into communication with a cylinder duct 32.
  • Each distribution duct is also connected, either directly or via the displacement selector, to one of the main grooves 18 and 20 to be connected to the supply or the exhaust.
  • the first and second sections of the bore 22 in which are respectively arranged the first slide 24 and the second slide 26 each have a first distribution groove, respectively 24D1 and 26D1 which is permanently connected to the first groove main 18 and therefore the first main duct 1, and a second distribution groove respectively 24D2 and 26D2 which is permanently connected to the second main groove 20 and therefore to the second main duct 2.
  • the figure 1 shows a bore 25, which is formed in the inner distributor 16 and connects the distribution grooves 24D1 and 26D1.
  • the first and second sections of the bore 22 in which the drawers 20 and 24 are respectively arranged each further have a connecting groove, respectively 24L and 26L which, for each section, is capable of being connected to one or the other. other first and second distribution grooves according to the position of the drawer 26.
  • the control means of the displacement selector comprise a first control chamber 34 for the first slide 24 and a second control chamber 36 for the second slide 26. These chambers are supplied with fluid by control ducts, respectively for the chamber. 34, and 37 for the chamber 36. These pilot ducts are formed by holes in the internal distributor 16, and open into grooves, respectively 35A and 37A, the distribution cover 2C. This cover itself has holes, respectively 35B and 37B, which open into these grooves to communicate with the control ducts 35 and 37.
  • the holes 35B and 37B are connected to valves (not shown) to be selectively connected to a source of pressurized fluid, for example booster fluid, or to a tank without overpressure, so as to feed the control chambers or to let them purge.
  • Seals are disposed between the outer axial face 16B of the inner distributor and the inner axial face 2C 'of the distribution lid, on either side of the grooves 35A, 20/20', 18/18 'and 37A previously mentioned.
  • these axial faces have shoulders, also arranged between joints, such as the shoulder e, to balance the axial thrust forces of the inner distributor on the cylinder block, the spaces formed between two opposite shoulders that can be fed in pushing fluid.
  • the control chambers 34 and 36 are arranged at the respective ends of the drawers. More specifically, the chamber 34 is delimited between the end 24B of the slide 24 opposite the cavity 24A and a cover 22A which is attached to the internal distributor so as to close the bore 22.
  • the chamber 36 is disposed between the end 26B of the slide 26 opposite the cavity 26A and the opposite end 22B of the bore which is closed by a bottom portion 16 'of the inner distributor. This bottom portion 16 'may be formed by an attached cover or a wall in one piece with the body of the inner distributor 16.
  • the cover 22A is disposed on the side of the distributor which is close to the block. cylinders.
  • the connecting groove 24L of the first section of the bore 22 is situated between the distribution grooves 24D1 and 24D2 of this section, just as the connection groove 26L of the second section is located between the distribution grooves 26D1 and 26D2 of this section. section.
  • the external axial peripheries of the drawers 24 and 26 have communication grooves. More specifically, the outer periphery of the slide 24 has a communication groove 24C which, depending on the position of this slide, communicates between them the grooves 24L and 24D1 by isolating them from the groove 24D2 ( figure 1 ) or makes the grooves 24L and 24D2 communicate with one another by isolating them from the groove 24D1 ( figures 2 and 3 ).
  • the outer periphery of the slide 26 has a communication groove 26C which, according to the position of the slide 26, makes the grooves 26D1 and 26L communicate with each other by isolating them from the groove 26D2 ( figures 1 and 2 ) or makes the grooves 26D2 and 26L communicate with each other by isolating them from the groove 26D1 ( figure 3 ).
  • the zone of the bore 22 in which the spring 28 is arranged between the drawers 24 and 26, is connected to a leak return duct 38 which opens into the radial face 16A of the internal distributor 16 and communicates with the internal space of the housing to reduce the leaks to a tank without overpressure.
  • the internal distributor has a radial bore 38 ', which extends between the aforementioned region of the bore and the duct 38, which is oriented axially.
  • the first spool 24 has moved in the direction F1, away from the cover 22A and towards the opposite end 22B of the bore 22.
  • the spool 26 is also in its extreme position towards this end 22B of the bore, since the chamber 36 is not supplied with fluid.
  • a thrust is exerted on the slide 26, via a direct cooperation between the drawers or via the force exerted by the spring 28.
  • the grooves 24D1 and 24L communicate with each other
  • the grooves 26D1 and 26L communicate with each other and these four grooves communicate with the first main groove 18, while the grooves 24D2 and 26D2 communicate with the second main groove 20.
  • the grooves 26D1 and 26L communicate with each other and, like the groove 24D1, they communicate with the first main groove 18, while the grooves 24D2 and 24L communicate with each other and, like the groove 26D2, they communicate with the second main throat 20.
  • the distribution ducts of the first primary group are all connected either to the groove 24D1 or to the groove 26D1, while the distribution ducts of the second primary group are all connected either to the groove 24D2 or the groove 26D2 . It may be interesting, however, for some of the distribution ducts of the first primary group to be connected to the groove 24D1 (like the conduit 30) while the remaining part is connected to the groove 26D1. Similarly, it may be interesting that some of the distribution ducts of the second primary group are connected to the groove 24D2 while the remaining portion is connected to the groove 26D2.
  • the distribution ducts of the first secondary group can all be connected to the groove 26L, while the distribution ducts of the second secondary group can all be connected to either the groove 24D2 or the groove 26D2 (or are distributed between connected ducts to the groove 24D2 and ducts connected to the groove 26D2).
  • the distribution ducts of the first tertiary group can all, like the conduit 31, be connected to the groove 24L, while the distribution ducts of the second tertiary group are all connected either to the groove 24D2, or to the groove 26D2 (or are distributed between conduits connected to the groove 24D2 and ducts connected to the groove 26D2).
  • the distribution ducts of the second primary, secondary and tertiary groups are all permanently connected to each other, and to the second main groove 20; the distribution ducts of the first tertiary group are also connected to this groove 20 when the third machine M3 is inactive ( figures 2 and 5 ); the distribution ducts of the first secondary group are also connected to this groove 20 when the machine M2 is inactive ( figures 3 , 6 and 7 ).
  • This machine therefore has a preferred direction of operation, in which the main groove 20 is connected to the fluid outlet.
  • FIGS 4 to 7 show an embodiment in which the supply of a control chamber 34 or 36 solicits the displacement of the corresponding drawer, 24 or 26, without causing the displacement of the other drawer.
  • the same references are used as on the Figures 1 to 3 .
  • This embodiment differs from that of Figures 1 to 3 in that, for each drawer, an abutment limits the movement of the drawer during the supply of the corresponding control chamber.
  • the slide 24 has a shoulder 44 located in this case towards its end 24B.
  • this shoulder 44 abuts against an abutment surface 44 'located on a surface of the bore 22; in this case this surface is formed at the free end of this bore located in the distribution face 16A.
  • the slide 26 has a shoulder 46, located towards its end 26B and which, when the control chamber 36 is supplied with fluid, abuts against an abutment surface 46 'formed in the wall of the bore 22.
  • the displacement selector is capable of adopting four different configurations, corresponding to four separate displacements.
  • the figure 4 shows the first configuration, which corresponds to that of the figure 1 , the chamber 34 being supplied with fluid and the slide 24 is thus moved in the direction F1, while the slide 26 remains towards the bottom 22B of the bore, the control chamber 36 is not fed.
  • the slide 24 has moved in the direction F1 until its shoulder 44 has come into abutment against the surface 44 'of the bore.
  • the communication between the different gorges is then the same as on the figure 1 , so that the three sub-machines M1, M2 and M3 mentioned above are active.
  • the configuration represented on the figure 5 corresponds to that of the figure 2 none of the two control chambers 34 and 36 being supplied with fluid, and the two drawers being respectively pushed towards the cover 22A and towards the bottom 26B of the bore.
  • the communication between the different gorges is then the same as on the figure 2 , so that only the sub-machines M1 and M2 are active.
  • the configuration of the figure 6 corresponds to that of the figure 3 , the two drawers being in their extreme positions in the direction of the arrow F2, only the chamber 36 being fed. In its movement in the direction F2, the slide 26 has stopped by the abutment of its shoulder 46 against the abutment surface 46 '. The communication between the different gorges is the same on the figure 3 , so that only the sub-machine M1 is active.
  • the figure 7 illustrates the additional configuration that can be obtained thanks to the presence of the stops, according to which the two chambers 34 and 36 are supplied with fluid, so that the slide 24 has moved in the direction F1 until the abutment of the shoulder 44 against the surface 44 ', and that the slide 26 has moved in the direction F2 until the abutment of the shoulder 46' against the surface 46.
  • the fluidic connections of the grooves 24D1, 24L and 24D2 of the first section of the bore are the same as on the figure 1
  • the fluidic connections of the grooves 26D1, 26L and 26D2 are the same as on the figure 3 .
  • the grooves 24D1 and 24L communicate with each other while being isolated from the groove 24D2, and the grooves 26D2 and 26L communicate with each other while being isolated from the groove 26D1.
  • the sub-machines M1 and M3 are active while the sub-machine M2 is inactive.
  • the distribution ducts of the first primary and tertiary groups are connected to the groove 18
  • the distribution ducts of the second primary and tertiary groups are connected to the groove 20
  • the distribution ducts of the first and second secondary groups are interconnected, being in this case also connected to the second groove 20.
  • the machine of the figure 8 is of the rotary cylinder block and fixed housing type; its internal distributor 116 is fitted into the counter-distributor 102C, which forms part of the housing 2A, 2B and 102C.
  • the machine of the figure 8 its displacement selector disposed in the portion 102C of the housing and not in its internal distributor 116 which, in this case, is hollow.
  • the axial recess 115 of the distributor 116 may for example be used to house a brake shaft (not shown).
  • the displacement selector is housed in a bore 122 of the part 2C of the housing which, for this purpose, may have a radial extension.
  • the bore 122 is offset relative to the axis 10 of the machine.
  • the bore 122, the two drawers 124 and 126, and the spring 128 of the displacement selector are similar to the bore 22, the drawers 24 and 26 and the spring 28 of the Figures 1 to 3 . Stops similar to those described with reference to Figures 4 to 7 can also be planned.
  • the distribution grooves and connecting grooves 124D2, 124L, 124D1, 126D2, 126L and 124D1 are organized as the grooves 24D2, 24L, 2D1, 26D2, 26L and 26D1 of the preceding figures.
  • the area of the bore 122 between the drawers 124 and 126 is connected to a leak return duct, for example by a radial bore of which we see the primer 138 '.
  • the control chambers 134 and 136 are arranged like the control chambers 34 and 36 and, as they are fed by control ducts, respectively 135 and 137.
  • a first main enclosure 118 which is connected to the first main conduit 1, is formed between the inner axial face 102C 'of the counter-distributor 102C and the outer axial face 116B of the distributor 116, which are opposite.
  • a second main enclosure 120 which is connected to the second main conduit 2, is also formed between these axial faces 102C 'and 116B opposite.
  • the distribution grooves 124D1 and 126D1 are permanently connected to the first main enclosure 118, and the distribution grooves 124D2 and 126D2 are connected permanently to the second main speaker 120.
  • the main speakers 118 and 120 are defined by respective grooves of the axial face 102C 'and the axial face 116B, which are in register.
  • the distribution grooves 124D2 and 126D1 are respectively connected to the main speakers 120 and 118 by radial bores, respectively 121 and 119, against the distributor 102C;
  • the distribution groove 124D1 is connected by a hole P1 of the counter-distributor to a buffer chamber ET1, which is formed between the faces 102C 'and 116B and is connected to the chamber 118 by a first connection hole L1 of the counter-distributor ;
  • the distribution groove 126D2 is connected by a bore P2 of the counter-distributor to a buffer chamber ET2, which is formed between the faces 102C 'and 116B and is connected to the chamber 120 by a second connection bore L2 of the counterpart distributor.
  • first distribution grooves 124D1 and 126D1 are interconnected by the first connection bore L1 of the counter-distributor formed by the housing portion 102C, and the second distribution grooves 124D2 and 126D2 are interconnected by the second bore L2 of this housing part.
  • the first connecting groove 124L is connected by a hole PL1 of the counter-distributor to a first secondary enclosure ES1 formed between the faces 102C 'and 116B
  • the second connecting groove 126L is connected by a hole PL2 of the counter-distributor to a second secondary speaker ES2 formed between the faces 102C 'and 116B.
  • the distribution ducts like the duct 131 ', open in the radial distribution face 116A of the distributor 116 and are connected, in groups, to the enclosures 118, 120 (and possibly ET1, ET2), ES1 and ES2 which come to be described.
  • FIG 9 shows an exemplary embodiment for a machine having a non-rotating cylinder block and a rotary housing, the distributor being also rotatable.
  • the figure 9 is a partial section. It only shows the essential elements for understanding.
  • the cylinder block 206 has radial cylinders 212 in which are mounted pistons 214 movable radially back and forth against the cam 204, itself formed in a housing portion 202B.
  • the fluid distributor and the displacement selector are housed in a housing portion 202C.
  • the distributor 216 is secured in rotation with this housing portion 202C by any appropriate means, for example by a connection 205 of the Oldham seal between radial faces facing the distributor 216 and the housing portion 202C.
  • the counter-distributor 217 is fitted into the distributor 216 and thus forms a core which, like the cylinder block, is non-rotating.
  • the internal axial face 216B of the distributor 216 is facing the outer axial face 217 'of the counter-distributor 217 and rotates relative thereto.
  • the bore 222 of the displacement selector is formed in the counter-distributor 217; this bore is in this case centered on the axis of rotation of the machine (that is to say, the axis of rotation of the distributor and the housing of the machine).
  • Bore 222 has distribution grooves and connecting grooves 224D2, 224L, 224D1, 226D2, 226L and 224D1, which are respectively organized as grooves 24D2, 24L, 2D1, 26D2, 26L and 26D1 described with reference to FIGS. Figures 1 to 3 .
  • Drawers 224 and 226, as well as a spring 228, respectively similar to the drawers 24, 26 and the spring 28, are arranged in the bore 222.
  • Control chambers 234 and 236, arranged as the control chambers 34 and 36 are, as they, fed by control conduits, respectively 235 and 237.
  • the first distribution grooves 224D1 and 226D1 are permanently connected to each other (by a hole 1 'of the counter-distributor) and to the first main pipe 1, while the second distribution grooves 224D2 and 226D2 are permanently interconnected (by a bore 2 'of the counter-distributor) and the second main duct 2. Furthermore, the first distribution groove 226D1 is connected to a first main enclosure 218, by a bore of the counter-distributor schematized by an arrow in the figure. Similarly, the second distribution groove 224D2 is connected to a second main enclosure 220 by bores of the counter-distributor schematized by an arrow. The first main enclosure 218 is thus permanently connected to the first main duct 1 and the first distribution grooves, while the second main enclosure 220 is permanently connected to the second main duct 2 and the second distribution grooves.
  • the first connection groove 224L is connected to a first secondary enclosure ES1 and the second connecting groove 226L is connected to a second secondary enclosure ES2, these secondary enclosures being provided between the facing axial faces 217 'and 216B.
  • the distribution ducts open into the radial distribution face 216A of the distributor 216 and are connected in groups to the enclosures 218, 220, ES1 and ES2.
  • connection of the distributor to the main ducts is therefore performed via a core 217 "of the machine which forms a stator and passes inside the cylinder block, for example if the machine is a drive motor of a wheel, its housing can form a part of the hub of the wheel, and this core 217 "may be the rocket of the wheel.Also, the pilot ducts 235 and 237 that serve to the supply of control chambers 234 and 236 pass in this case by this core 217 ".
  • the distribution grooves 224D1 and 224D2 can be selectively connected to the connecting groove 224L by a communication groove 224C of the slide 224, just as the distribution grooves 226D1 and 226D2 can be selectively connected to the groove link 226L by a communication groove 226C of the drawer 226; the respective positions of these drawers are controlled by the control chambers 234 and 236, being further noted that the drawers may have stops of the type described in reference to Figures 4 to 7 to be able to adopt four relative positions.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Hydraulic Motors (AREA)
EP16197607.1A 2015-11-10 2016-11-07 Verteilvorrichtung für eine hydraulische maschine, und mit einer solchen vorrichtung ausgestattete hydraulische maschine Active EP3190292B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1560767A FR3043433B1 (fr) 2015-11-10 2015-11-10 Dispositif de distribution pour une machine hydraulique et machine hydraulique equipee d'un tel dispositif

Publications (2)

Publication Number Publication Date
EP3190292A1 true EP3190292A1 (de) 2017-07-12
EP3190292B1 EP3190292B1 (de) 2018-10-31

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EP16197607.1A Active EP3190292B1 (de) 2015-11-10 2016-11-07 Verteilvorrichtung für eine hydraulische maschine, und mit einer solchen vorrichtung ausgestattete hydraulische maschine

Country Status (4)

Country Link
US (1) US10690109B2 (de)
EP (1) EP3190292B1 (de)
CN (1) CN107061136B (de)
FR (1) FR3043433B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3080576B1 (fr) * 2018-04-25 2022-05-13 Poclain Hydraulics Ind Agencement hydraulique pour une roue directrice d'un vehicule
FR3135305A1 (fr) * 2022-05-06 2023-11-10 Poclain Hydraulics Industrie Machine hydraulique munie d’un tiroir de changement de sens

Citations (4)

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EP0284460A1 (de) 1987-02-25 1988-09-28 POCLAIN HYDRAULICS Société Anonyme de droit français Druckflüssigkeitsmechanismus, Pumpe oder Motor mit mehreren Verdrängungsvolumen
GB2253658A (en) * 1991-03-04 1992-09-16 Poclain Hydraulics Sa Assembly of a pressurized fluid motor with multiple cubic capacities and of a brake associated therewith

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US3139109A (en) * 1961-03-13 1964-06-30 Erich Herion Valve control system
US3536089A (en) * 1967-05-16 1970-10-27 Westinghouse Air Brake Co Electric to fluid pressure transducer
US3621760A (en) * 1969-06-02 1971-11-23 Robert W Goode Universal power unit
FR2236132B1 (de) * 1973-07-03 1983-11-18 Messier Hispano Sa
DE2735559C2 (de) * 1977-08-06 1986-10-30 Robert Bosch Gmbh, 7000 Stuttgart Elektrohydraulisches Steuergerät für ein hydraulisch angetriebenes Arbeitsgerät
JPS5676704A (en) * 1979-11-27 1981-06-24 Uchida Yuatsu Kiki Kogyo Kk Change-over valve with flow collecting and dividing function
DE3331582A1 (de) * 1983-09-01 1985-03-21 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart 4/3-wegeventil
SU1638358A1 (ru) * 1987-03-31 1991-03-30 Институт горного дела им.А.А.Скочинского Ступенчато регулируемый радиально-поршневой гидромотор
FR2637944B1 (fr) * 1988-10-19 1991-01-25 Poclain Hydraulics Sa Mecanisme a fluide sous pression a deux cylindrees et circuit ferme en faisant application
JPH073220B2 (ja) * 1989-04-29 1995-01-18 株式会社島津製作所 ポンプ／モータの容量制御機構
FR2951798B1 (fr) * 2009-10-22 2011-12-09 Poclain Hydraulics Ind Dispositif de transmission hydrostatique permettant un freinage ameliore
JP5256545B2 (ja) * 2010-02-10 2013-08-07 Ｓｍｃ株式会社 減圧切換弁
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FR2127268A5 (de) 1971-03-02 1972-10-13 Poclain Sa
FR2481755A1 (fr) * 1980-04-30 1981-11-06 Poclain Hydraulics Sa Moteur a fluide sous pression muni d'un dispositif de selection de sa vitesse de rotation
EP0284460A1 (de) 1987-02-25 1988-09-28 POCLAIN HYDRAULICS Société Anonyme de droit français Druckflüssigkeitsmechanismus, Pumpe oder Motor mit mehreren Verdrängungsvolumen
GB2253658A (en) * 1991-03-04 1992-09-16 Poclain Hydraulics Sa Assembly of a pressurized fluid motor with multiple cubic capacities and of a brake associated therewith

Also Published As

Publication number Publication date
US20170130693A1 (en) 2017-05-11
US10690109B2 (en) 2020-06-23
EP3190292B1 (de) 2018-10-31
CN107061136B (zh) 2020-04-03
CN107061136A (zh) 2017-08-18
FR3043433B1 (fr) 2017-12-08
FR3043433A1 (fr) 2017-05-12

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