EP0263218B1 - Flüssigkeitsmechanismus mit Fluidverteilscheibe und Gegenscheibe - Google Patents

Flüssigkeitsmechanismus mit Fluidverteilscheibe und Gegenscheibe Download PDF

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Publication number
EP0263218B1
EP0263218B1 EP19860402228 EP86402228A EP0263218B1 EP 0263218 B1 EP0263218 B1 EP 0263218B1 EP 19860402228 EP19860402228 EP 19860402228 EP 86402228 A EP86402228 A EP 86402228A EP 0263218 B1 EP0263218 B1 EP 0263218B1
Authority
EP
European Patent Office
Prior art keywords
orifices
orifice
communication
face
cylinder
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.)
Expired - Lifetime
Application number
EP19860402228
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English (en)
French (fr)
Other versions
EP0263218A1 (de
Inventor
Louis Bernard Bigo
Marc Lucien Perot
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 France SA
Original Assignee
Poclain Hydraulics France SA
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
Priority to FR8513968A priority Critical patent/FR2587761B1/fr
Application filed by Poclain Hydraulics France SA filed Critical Poclain Hydraulics France SA
Priority to DE8686402228T priority patent/DE3668038D1/de
Priority to EP19860402228 priority patent/EP0263218B1/de
Publication of EP0263218A1 publication Critical patent/EP0263218A1/de
Application granted granted Critical
Publication of EP0263218B1 publication Critical patent/EP0263218B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04B1/0465—Distribution members, e.g. valves plate-like

Definitions

  • Known pressurized fluid motors in particular hydraulic motors, include fluid distribution glasses to their successive cylinders and, sometimes, distribution counter-windows.
  • the latter have essentially been provided as wearing parts enabling the initial operating characteristics of the mechanism to be preserved, even after a long period of operation.
  • FR-A 2 533 965 represents a mechanism comprising such a dispensing glass and FR-A 2 426 801 describes a mechanism further comprising a distribution counter-glass constituting a wearing part.
  • the invention relates to such mechanisms, therefore being relative to a hydraulic mechanism, motor or pump, consisting of a cylinder block associated with a face for communication with the outside, a plurality of cylinders formed in the cylinder block , inside each of which slides a piston, each cylinder being connected to said communication face associated with the cylinder block by a cylinder duct opening into this communication face by a cylinder orifice, a cam with respect to which the cylinder block is rotatably mounted, on the surface of which the pistons are capable of being supported and which comprises a plurality of undulations, a distribution glass integral in rotation with the cam, associated with a communication face comprising as many pairs of orifices that there are undulations, the first orifice of a pair of orifices being capable of being placed in communication with a first enclosure containing a fluid under pressure, the second orifice of said pair of orifices being capable of being placed in communication with a second enclosure without pressure and being disposed between the first orifice of said pair and the
  • the shapes of the orifices of the communication face associated with the cylinder block are complementary to those of the first and second orifices of the communication face associated with the distribution glass, the area of an orifice of the face communication associated with the cylinder block being substantially equal to that of the space delimited, on the one hand, between the two said circles, and, on the other hand, between the first and second orifices of a pair of orifices the communication face associated with the distribution glass, to the operating clearance allowing said succession, for an orifice of the communication face associated with the cylinder block, of the communication with a first orifice, of the isolation from the first and second orifices and the communication with said second orifice of a pair of orifices of the communication face associated with the dispensing glass.
  • the object of the invention is completely distinct from the search for a solution to the problems of maintaining initial operating characteristics in service: it is, with or without distribution counter-windows, to allow the realization of a mechanism having the transverse dimensions (in a plane perpendicular to the axis of rotation of the rotor) as small as possible.
  • the minimum distance separating the neighboring edges of two successive orifices of the dispensing glass had to be greater than the corresponding dimension of the orifice (of a cylinder) capable of being placed between the two said orifices of distribution ice.
  • the invention by proposing the adoption of the aforementioned particular provision, allows a reduction in the value of this minimum distance and therefore allows the production of more compact mechanisms than those previously known.
  • the main advantage which is obtained by adoption of the provisions in accordance with the invention resides in the possibility of arranging the centers of the orifices of cylinders on a circle of radius smaller than those of the corresponding circles of the previously known mechanisms and, consequently, of being able to produce more compact, lighter and less expensive mechanisms.
  • the invention applies, in particular, to hydraulic mechanisms, such as those described in FR-A 2 504 987 and FR-A 2 533 965.
  • the flat face 18 of the dispensing glass 17 bears on the flat face 16 of the cylinder block 9.
  • All the orifices 33 on the face 16 are circular and identical, and are centered on the same circle of axis 7, therefore tangent to two concentric circles 34 (outer circle and 35 (inner circle), being also, angularly, regularly spaced.
  • the orifices 23 and 24 of the face 18 of the dispensing glass 17 are also angularly regularly spaced and shaped as lunules tangent to two concentric circles of axis 7, exterior 34a and interior 35a, of radii equal to those of circles 34 and 35, respectively.
  • Any lunula 23 is spaced of the following 24 and so on, so as to leave between two successive lunules a surface slightly greater than that corresponding to an orifice 33 on the face 16, so that during the rotation of the cylinder block 9, by comparison t to the distribution window 17, each orifice 33 on the face 16 of the cylinder block, successively, ie first in complete communication only with an orifice 23 on the face 18 of the dispensing glass, then, disposed between an orifice 23 and the following orifice 24, is then isolated both from these two orifices 23 and 24 and, finally, either complete communication only with said port 24, and so on.
  • the orifices 33 are circular, the orifices 23 and 24 having the shape of lunules
  • the inventive idea is to ensure that the shapes of the orifices 23 and 24, d on the one hand, orifices 33, on the other hand, are complementary so that an orifice 33 disposed between an orifice 23 and an orifice 24 can be isolated simultaneously from one and the other of these two orifices, all by filling as much as possible the space between the circles 34 and 35 (or 34a and 35a) and the two said orifices 23, 24, to the nearest clearance allowing satisfactory hydraulic switching of the communication of an orifice 33 with an orifice 23 , then the isolation of the orifice 33 from the two said orifices 23 and 24, then finally the communication of this orifice 33 with the orifice 24.
  • Figures 5, 6 and 7 show precisely an alternative embodiment in which the flat face 18 of the dispensing glass 17 is also in direct contact with the flat face 16 of the cylinder block 9, the orifices 23, 24 of the glass 18 having the circular shape, and the orifices 33 of the face 16 having the shape of lunules, complementary to the circular shapes of said orifices 23, 24, as has just been explained above.
  • the circular shape of a hole is often related to the method of obtaining this hole by drilling.
  • the shape of a lunule hole is less usual and is often, as regards the holes made in a solid part, obtained by molding in foundry.
  • the distribution counter-glass 36 integral in rotation with the distribution glass 17, is provided.
  • the distribution glass 17 and the counter glass 36 are secured in rotation to the casing 1 by a securing means 25 similar to that shown in FR-A 2 533 965.
  • the faces 16 and 18 of 9 and 17, respectively, are plane , perpendicular to the axis 7, and the counter-glass 36 is a thin piece (3 mm for example), also delimited by two plane faces 37, 38, perpendicular to the axis 7.
  • the plane face 37 is in support on the flat face 16 of the cylinder block 9 with respect to which it is capable of sliding; the flat face 38 is supported on the flat face 18 of the distribution glass 17.
  • the distribution counter-glass 36 has through holes 39, 40 of constant sections, in the form of lunules, and which correspond to the holes 23, 24 distribution glass 17, superimposed on said holes 23, 24, without completely covering them (see FIG. 11). Furthermore, the shape of these holes 39, 40 is complementary to that of the holes 33 of the face 16 of the cylinder block 9, the qualifier "complementary" having the same meaning as that specified above with reference to FIGS. 3 and 4
  • the holes 39, 40 are contained between two circles 34b, 35b centered on the axis 7, of the same radius as the circles 34, 35, respectively.
  • FIGS. 12 to 15 A variant of the embodiment of FIGS. 8 to 11 is shown in FIGS. 12 to 15.
  • a distribution counter-glass 43 is made integral in rotation with the cylinder block 9, by means of screws 41, the glass of distribution remaining integral in rotation with the casing 1 by the securing means 25. It is a thin piece (of the order of 3 mm), delimited by two plane faces 44, 45 perpendicular to the axis 7, which are resting on the faces 16 of the cylinder block 9 and 18 of the distribution glass 17, respectively.
  • This distribution window 43 has through holes 42 in a number equal to that of the orifices 33 of the cylinder block 9. The holes 42 correspond to the orifices 33, are superposed thereon, without completely covering them (see FIG.
  • the counter-windows 36 and 43 are pieces of small thicknesses which make it possible to obtain the through holes which they comprise in a simple and inexpensive manner, even when the shapes of these holes are not trivial ( lunules with two concavities, or substantially trapezoidal): laser cutting, or stamping, are suitable for this machining.
  • the "complementarity" of the shapes of the orifices capable of being successively placed in communication with one another, then isolated from one another, such as the orifices 33 of the cylinder block and the orifices 23, 24 of the dispensing glass 17 of the embodiment of FIGS. 1 to 4, allows, with circles 34, 35 of determined diameters, to have between these two circles more orifices 23, 24 in the form of lunules with parts narrowed central, that if these holes 23, 24 were circular, of course of the same sections as these lunules in order to be able to convey the same flow in both configurations.
  • the diameters of the circles 34, 35 are, in the provisions adopting orifices in the form of lunules, smaller than when these orifices are circular.
  • the mechanisms according to the invention can be more compact, therefore lighter and less costly, than those known previously.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Motors (AREA)

Claims (4)

1. Flüssigkeitsmechanismus, Motor oder Pumpe, der aufgebaut ist aus
- einem Zylinderblock (9), der mit einer Fläche (16) zur Verbindung mit der Umgebung verbunden ist.
- einer Mehrzahl von Zylindern (11), die in dem Zylinderblock vorgesehen sind, wobei im Inneren eines jeden Zylinders ein Kolben (12) gleitet und wobei jeder Zylinder mit der mit dem Zylinderblock verbundenen Verbindungsfläche über eine Zylinderleitung (32) verbunden ist, die über eine Zylinderöffnung (33) in die Verbindungsfläche mündet,
- einer Nocke (4), in bezug auf die der Zylinder block drehbar angebracht ist, auf deren Oberfläche sich die Kolben geeignet abstützen (13) und die eine Mehrzahl von Welligkeiten aufweist,
- einer Verteilscheibe (17), die sich zusammen mit der Nocke dreht (25), die mit einer Verbindungsfläche (18) verbunden ist, welche ebenso viele Öffnungspaare (23, 24) wie Welligkeiten aufweist, wobei mit der ersten Öffnung (23) eines Öffnungspaares eine Verbindung mit einem ersten, eine unter Druck befindliche Flüssigkeit enthaltenden Raum (30) hergestellt werden kann, wobei mit der zweiten Öffnung (24) des Öffnungspaares eine Verbindung mit einem zweiten, drucklosen Raum (31) hergestellt werden kann, wobei die zweite Offnung (24) zwischen der ersten Öffnung (23) des Paares und der ersten Öffnung (23) des folgenden Paares angeordnet ist und wobei nacheinander mit jeder Öffnung des Zylinders (33) im Verlauf der Drehung des Zylinderblocks in bezug auf die Nocke mit der ersten Öffnung (23) eines Öffnungspaares eine Verbindung hergestellt werden kann, daraufhin diese Öffnung (33) von der ersten Öffnung (23) und der zweiten Öffnung (24) der Öffnungspaares getrennt werden kann, indem sie zwischen der ersten und der zweiten Öffnung angeordnet wird, und schließlich mit der Öffnung (33) und der zweiten Öffnung (24) des Öffnungspaares eine Verbindung hergestellt werden kann, wobei die mit dem Zylinderblock (9) und der Verteilscheibe (17) verbundenen Verbindungsflächen (16, 18) außerdem eben, senkrecht zur Drehachse und in direktem gegenseitigem Kontakt sind, wobei die Öffnungen der mit dem Zylinderblock (33) verbundenen Verbindungsfläche und die ersten (23) und zweiten (24) Öffnungen der mit der Verteilscheibe (17) verbundenen Verbindungsflächen alle zwischen zwei konzentrischen Kreisen (34: 35; 34a, 35a) münden, dadurch gekennzeichnet, daß die Formen der Öffnungen der mit dem Zylinderblock (33) verbundenen Verbindungsfläche komplementär sind zu den Formen der ersten (23) und zweiten (24) Öffnungen der mit der Verteilscheibe (17) verbundenen Verbindungsfläche, die Querschnittsfläche einer Öffnung der mit dem Zylinderblock verbundenen Verbindungsfläche genau gleich derjenigen des Raumes, der einerseits durch die zwei Kreise (34, 35) und andererseits durch die ersten (23) und zweiten (24) Öffnungen eines Öffnungspaares der mit der Verteilscheibe (17) verbundenen Verbindungsfläche begrenzt wird, ist, so daß im Betrieb für eine Öffnung in der mit dem Zylinderblock verbundenen . Verbindungsfläche der genannte Ablauf ermöglicht wird, nämlich die Verbindung mit einer ersten Öffnung, die Trennung von den ersten und zweiten Öffnungen und die Verbindung mit der zweiten Öffnung eines Öffnungspaares der mit der Verteilscheibe verbundenen Verbindungsfläche.
2. Flüssigkeitsmechanismus gemäß Anspruch 1, dadurch gekennzeichnet , daß die mit dem Zylinderblock (9) verbundene Verbindungsfläche (45) zu einer Gegenscheibe (43) gehört, die sich zusammen mit dem Zylinderblock (9) dreht (41).
3. Flüssigkeitsmechanismus gemäß einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß die mit der Verteilscheibe (17) verbundene Verbindungsfläche (37) zu einer Gegenverteilscheibe (17) gehört, die sich zusammen mit der Verteilscheibe (17) dreht (25).
4. Flüssigkeitsmechanismus gemäß einem der Ansprüche 2 und 3, dadurch gekennzeichnet, daß eine Gegenscheibe (36; 43) von einem von Durchlaßöffnungen (39, 40; 42) durchstoßenen, dünnen Teil aufgebaut wird, in dem die Durchlaßöffnungen durch Ausstanzungen konstanten Querschnitts von einer Verbindungsfläche zur anderen Verbin- . dungsfläche der Gegenscheibe gewonnen werden.
EP19860402228 1985-09-20 1986-10-08 Flüssigkeitsmechanismus mit Fluidverteilscheibe und Gegenscheibe Expired - Lifetime EP0263218B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR8513968A FR2587761B1 (fr) 1985-09-20 1985-09-20 Mecanisme hydraulique comportant des glace et contre-glace de distribution du fluide
DE8686402228T DE3668038D1 (de) 1986-10-08 1986-10-08 Fluessigkeitsmechanismus mit fluidverteilscheibe und gegenscheibe.
EP19860402228 EP0263218B1 (de) 1986-10-08 1986-10-08 Flüssigkeitsmechanismus mit Fluidverteilscheibe und Gegenscheibe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19860402228 EP0263218B1 (de) 1986-10-08 1986-10-08 Flüssigkeitsmechanismus mit Fluidverteilscheibe und Gegenscheibe

Publications (2)

Publication Number Publication Date
EP0263218A1 EP0263218A1 (de) 1988-04-13
EP0263218B1 true EP0263218B1 (de) 1990-01-03

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EP19860402228 Expired - Lifetime EP0263218B1 (de) 1985-09-20 1986-10-08 Flüssigkeitsmechanismus mit Fluidverteilscheibe und Gegenscheibe

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EP (1) EP0263218B1 (de)
DE (1) DE3668038D1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3011045A1 (fr) * 2013-09-25 2015-03-27 Vianney Rabhi Bague d'etancheite pour distributeur de pompe hydraulique

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2679963B1 (fr) * 1991-08-01 1993-11-12 Poclain Hydraulics Mecanisme a fluide sous pression muni d'enceintes d'equilibrage particulieres.
DE4134582A1 (de) * 1991-10-19 1993-04-22 Bosch Gmbh Robert Radialkolbenmaschine
DE4337508A1 (de) * 1993-11-03 1995-05-04 Rexroth Mannesmann Gmbh Radialkolbenmotor als Einschubmotor
WO2001077495A1 (de) * 2000-04-11 2001-10-18 Mannesmann Rexroth Ag Radialkolbenmaschine
DE10033264A1 (de) * 2000-04-11 2001-10-18 Mannesmann Rexroth Ag Radialkolbenmaschine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2504987B1 (fr) * 1981-05-04 1986-04-18 Poclain Hydraulics Sa Mecanisme a fluide sous pression comportant des galets de reaction portes par des pistons
FR2533965B1 (fr) * 1982-09-30 1986-12-26 Poclain Hydraulics Sa Mecanisme a fluide sous pression, moteur ou pompe
FR2587761B1 (fr) * 1985-09-20 1988-01-15 Poclain Hydraulics Sa Mecanisme hydraulique comportant des glace et contre-glace de distribution du fluide

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3011045A1 (fr) * 2013-09-25 2015-03-27 Vianney Rabhi Bague d'etancheite pour distributeur de pompe hydraulique
WO2015044571A1 (fr) * 2013-09-25 2015-04-02 Vianney Rabhi Bague d'étanchéité pour distributeur de pompe hydraulique
AU2014326490B2 (en) * 2013-09-25 2018-01-25 Vianney Rabhi Sealing ring for a hydraulic pump distributor

Also Published As

Publication number Publication date
EP0263218A1 (de) 1988-04-13
DE3668038D1 (de) 1990-02-08

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