EP1557562B1 - Verteilervorrichtung für einen hydraulischen Radialkolbenmotor - Google Patents

Verteilervorrichtung für einen hydraulischen Radialkolbenmotor Download PDF

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Publication number
EP1557562B1
EP1557562B1 EP04468002A EP04468002A EP1557562B1 EP 1557562 B1 EP1557562 B1 EP 1557562B1 EP 04468002 A EP04468002 A EP 04468002A EP 04468002 A EP04468002 A EP 04468002A EP 1557562 B1 EP1557562 B1 EP 1557562B1
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EP
European Patent Office
Prior art keywords
distribution
outline
piston block
piston
annular
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
EP04468002A
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English (en)
French (fr)
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EP1557562A1 (de
Inventor
Jurij Manfreda
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.)
MANFREDA, MARIJA
MANFREDA, SIMON
PERAT, ERICA
Original Assignee
Manfreda Marija
Manfreda Simon
Perat Erica
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Publication date
Application filed by Manfreda Marija, Manfreda Simon, Perat Erica filed Critical Manfreda Marija
Priority to AT04468002T priority Critical patent/ATE434129T1/de
Priority to DE602004021554T priority patent/DE602004021554D1/de
Priority to EP04468002A priority patent/EP1557562B1/de
Publication of EP1557562A1 publication Critical patent/EP1557562A1/de
Application granted granted Critical
Publication of EP1557562B1 publication Critical patent/EP1557562B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F03C1/02—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
    • F03C1/0444—Particularities relating to the distribution members to plate-like distribution members

Definitions

  • the present invention refers to a distribution system for a piston hydraulic engine, in particularly for an engine with a rotating piston block, said engine comprising a distribution body with distribution channels, and a block with pistons and feeding channels arranged coaxially to the distribution body.
  • a distributor with hydraulic engines is common for all pistons, therefore, the piston position must alternate with regard to the distributor, or vice versa.
  • the circular distributor is placed coaxially with the engine axis where it rotates, whereas the piston block remains stationary.
  • Such a solution is disclosed in DE 19 653 591 C1 .
  • the drawback of said solution is wear and tear of the mutually cooperating distributor surfaces, resulting in an increased gap and leakage between channels and from the distributor into the housing, which increases with the power of three of the gap width.
  • said solution does not provide a hollow shaft design of a hydraulic engine.
  • US 4,522,110 Another solution is disclosed in US 4,522,110 .
  • the latter comprises distribution plates being associated in a pressure-tight manner with the facing ends of a distribution body and piston block, respectively.
  • the body and the piston block comprise distribution channels.
  • At the inner end of each distribution channel in the body there is a bore in which there is mounted an annular spacer which is pressed against the distribution plate by spring and by the pressure medium acting on the inner end surface of said spacer.
  • a solution requires fine machining of the bore for the annular spacer and spring, respectively. Fine machining is also required in order to achieve a smooth axial movement of the distribution plate within the seat thereof in the facing end of the body where the distribution plate is mounted.
  • a hydraulic engine comprising a distributor is known from the publication of the patent application DE 44 05 123 .
  • the separation of the sliding surfaces is solved by means of different combinations of contact, sealing, and resilient elements by means of which the fluid pressure is also applied to the rear of the distributor.
  • a constantly moving gap is achieved therewith, while the stationary gap increases due to wear, resulting in the seals preloading.
  • the object as set above is solved by a distribution system in accordance to claim 1, in that on the facing ends of the distribution body and the piston block, respectively, annular spacers are inserted in a pressure-tight manner into each mouth of the distribution channels and feeding channels, respectively. Said annular spacers being provided, equally radially spaced, in the distribution body and piston block, respectively.
  • annular distribution plate being associated in a pressure-tight manner with the distribution body and piston block, respectively
  • the distribution body is formed on its opposite end with a plurality of radially spaced blind holes wherein compression springs are arranged which are loaded in the axial direction by means of a pressure plate attached to the housing.
  • annular spacers are inserted in a pressure-tight manner into each mouth of the distribution channels being provided, equally radially spaced, in the distribution body and piston block, respectively, said annular spacers being covered and held by means of an annular distribution plate.
  • the latter is associated in a pressure-tight manner with the distribution body and piston block, respectively, and projects in an axial direction, when installed, above the surface of the distribution body and the piston block, respectively.
  • Each distribution plate is formed with distribution apertures, the radial position thereof is equal to the radial position of the annular spacers in the mouth of each distribution channels.
  • the outline of each distribution aperture, at least in one of the distribution plates, is selected to be a circle, square, rectangle or trapezium, preferably an annular segment.
  • one of the distribution plates preferably the distribution plate being associated with the distribution body, is made of a wear-resistant material.
  • the pistons and the piston block therewith wears more than the distribution body. Therefore, it has been proven that when the piston block has sufficient wear and requires replacing, the less resistant distribution plate attached to the piston block is replaced simultaneously.
  • the distribution plates and the annular spacers are connected in a pressure-tight manner both mutually as well as with the distribution body and the piston block, respectively. Connection can be completed by means of soldering, gluing or similar. Both the distribution plates as well as the annular spacers can be manufactured by means of punching, sintering, die casting or similar convenient method.
  • a piston hydraulic engine consist of a two-part housing 1a,1b joined face to face and a cam ring 2 arranged between the two halves of the housing 1a, 1b, where each contact surface between the housing and the cam ring 2 is appropriately sealed against leakage of hydraulic fluid.
  • a cylindrical distribution body 3 is arranged in the first half of the housing 1a, said body 3 being in a manner known per se separated from the housing 1a by means of a plurality of sealing elements 4.
  • Said housing 1a is formed on the inner surface thereof being in contact with the distribution body 3 with annular chambers 5, 6 intended for feeding and discharge, respectively, hydraulic fluid, said chambers being arranged between each pair of the sealing elements 4.
  • the first chamber 5 is a high-pressure feeding chamber
  • the second chamber 6 is a low-pressure discharge chamber. If it is required to change the direction of rotation, the pressure only needs to be switched in each of the chambers, so that the high-pressure chamber becomes the low-pressure chamber and vice versa.
  • the distribution body 3 is secured against rotation relatively to the housing 1a in a manner known per se and therefore not shown in detail.
  • the distribution body 3 is in its radial edge area and on the side facing the piston block formed with a plurality of distribution channels 7, 7' being equally spaced on the circumference of said body and extending parallel to the axis of the body 3, said channels being alternately connected to the high-pressure feeding chamber 5 and the low-pressure discharge chamber 6 provided in the housing 1a of the hydraulic engine. Said connection of the channels and annular chambers is carried out by means of transversal channels 8, 8'. The total number of said channels is always even and corresponds to double the cam lobes of the cam ring 2, said lobes cooperate with the pistons of the hydraulic engine.
  • each distribution channel 7, 7' facing the piston block is closed with an annular spacer 9 comprising a through-hole 9', the outline thereof on the feeding side, i.e. the side facing each channel, is adapted to the outline of the channel 7, 7', while the outline of the through-hole 9' on the discharge side, i.e. the side averted from each channel, is selected in a manner that the coefficient of the fluid resistance is as low as possible.
  • the outline of the through-hole 9' on the discharge side can be a circle, a square, a rectangle or a trapezium, preferably an annular segment, as it is shown in Fig. 2, Fig. 3 and Fig. 4 .
  • the annular spacers 9 are covered and held with an annular distribution plate 10 associated with the distribution body 3 and, when installed, projecting in an axial direction above the surface of the body 3.
  • Said distribution plate 10 is formed with distribution apertures 11 the radial position thereof is equal to the radial position of the through-hole 9' of each annular spacer 9, where the outline of each distribution aperture 11 is identical to the outline of the through-hole 9' at the discharge side of each annular spacer 9, so that the through-holes 9' and the distribution apertures 11 entirely coincide.
  • the distribution body 3 is formed on its opposite end with a plurality of radially spaced blind holes wherein compression springs 12 are arranged. The latter are loaded in the axial direction by means of a pressure plate 13 attached to the housing 1a.
  • each piston 15 is continuously in contact with the cam ring 2 via a roller 16.
  • the piston block 14 on the side facing the distribution body 3 is provided with a plurality of feeding channels 17 equally spaced on the circumference of said body and parallel to the axis of piston block 14, said channels being located at the same radial distance as are the channels 7, 7' in the distribution body 3.
  • the number of the feeding channels 17 equals the number of the pistons 15 in the block 14.
  • each channel 17 facing the distribution body 3 ends in an annular spacer 18 comprising a through-hole 18' the outline thereof at the discharging side, i.e. the side being averted from each channel, is adapted to the outline of the channel 17, while the outline of the through-hole 18' at the feeding side thereof, i.e. the side facing each channel, is selected in a manner that the coefficient of the fluid resistance is as low as possible.
  • the outline of said through-hole on the feeding side can be a circle, a square, a rectangle or a trapezium, preferably an annular segment, as it is provided with the through-holes 9' in the annular spacers 9 in the distribution body 3.
  • the annular spacers 18 are covered and held by means of a distribution plate 19 being associated with the piston block 14 and projecting, when installed, in an axial direction above the surface of the block 14.
  • Said distribution plate 19 is formed with distribution apertures 20 the radial position thereof equaling the radial position of the through-hole 18' of each annular spacer 18, the outline of each distribution aperture 20 is identical to the outline of the through-hole 18' at the feeding side of each annular spacer 18, so that the through-holes 18' and the distribution apertures 20 entirely coincide.
  • the above mentioned pressure plate 13 which presses a plurality of springs arranged in the distribution body 3 continuously provides load in the axial direction of the hydraulic engine resulting in the distribution plate 10 on the distribution body 3 being permanently pressed against the distribution plate 19 on the piston block 14, regardless of the wear and tear of the two distribution plates or the pressure of the hydraulic fluid.
  • the distribution plates 10, 19 as well as the apertures 11, 20 could be produced by means of punching, sintering, or die casting, depending on the material used, since the present invention facilitates the use of arbitrary materials.
  • Another embodiment of the distribution system is possible according to the present invention, where only distribution plates are employed, without annular spacers. Dimensions of the distribution apertures in each distribution plate can be optionally modified and the same applies to the channels. Such embodiment allows an increase in the allowable rotational frequency and decreasing of the hydraulic loss, respectively.
  • the distribution plate which is less resistant against the wear and tear is installed on the piston block, thus it can be replaced quickly and simply, if necessary, together with the piston block.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Hydraulic Motors (AREA)

Claims (8)

  1. Verteilungssystem für einen hydraulischen Kolbenmotor, insbesondere für einen Motor mit einem rotierenden Kolbenblock, wobei dieser Motor umfasst: einen Verteilungskörper mit Verteilungskanälen und einen Block mit Kolben und Zuführungskanälen, die koaxial zu dem Verteilungskörper angeordnet sind, wobei Verteilungsplatten in einer druckdichten Weise jeweils mit den Stirnenden eines Verteilungskörpers und eines Kolbenblocks verbunden sind, wobei die Verteilungsplatten, wenn sie installiert sind, jeweils in eine axiale Richtung über die Oberfläche des Verteilungskörpers und des Kolbenblocks vorstehen, wobei beide Verteilungsplatten mit Verteilungsöffnungen ausgebildet sind, die radiale Position der Verteilungsöffnungen jeweils der radialen Position der Verteilungskanäle in dem Verteilungskörper und der radialen Position der Zuführungskanäle in dem Kolbenblock gleicht und wobei die Verteilungsöffnungen jeweils mit den Verteilungskanälen und den Zuführungskanälen zusammenfallen, wobei der Umriss jeder Verteilungsöffnung in wenigstens einer der Verteilungsplatten (10, 19) derart ausgewählt ist, dass er ein Kreis, ein Quadrat, ein Rechteck, ein Trapez, bevorzugt ein ringförmiger Abschnitt ist, dadurch gekennzeichnet, dass auf den Stirnenden des Verteilungskörpers (3) und des Kolbenblocks jeweils ringförmige Abstandshalter (9; 18) in einer luftdichten Weise jeweils in jede Mündung der Verteilungskanäle (7, 7') und der Zuführungskanäle (17) eingesetzt sind, welche jeweils gleichmäßig radial beabstandet in dem Verteilungskörper (3) und dem Kolbenblock (14) bereitgestellt sind, wobei die ringförmigen Abstandshalter (9; 18) mit Hilfe einer ringförmigen Verteilungsplatte (10; 19) bedeckt sind und gehalten werden, die jeweils in einer druckdichten Weise mit dem Verteilungskörper (3) und dem Kolbenblock (14) verbunden ist und, wenn sie installiert ist, in der axialen Richtung jeweils über die Oberfläche des Verteilungskörpers (3) und des Kolbenblockes (14) vorsteht, und dass der Verteilungskörper auf seinem entgegengesetzten Ende mit einer Vielzahl radial beabstandeter blinder Löcher ausgebildet ist, in denen Druckfedern (12) angeordnet sind, die mittels einer an dem Gehäuse (1a) angebrachten Druckplatte (13) in die axiale Richtung gespannt sind.
  2. Verteilungssystem für einen hydraulischen Kolbenmotor nach Anspruch 1, dadurch gekennzeichnet, dass eine der Verteilungsplatten (10, 19), vorzugsweise die mit dem Verteilungskörper (3) verbundene Verteilungsplatte (10), aus einem Material gefertigt ist, das widerstandsfähiger gegen Abnutzung und Abriss ist als die Verteilungsplatte (19), die mit dem Kolbenblock (14) verbunden ist.
  3. Verteilungssystem für einen hydraulischen Kolbenmotor nach Anspruch 1 und 2, dadurch gekennzeichnet, dass jeder ringförmige Abstandhalter (9), der mit dem Verteilungskörper (3) verbunden ist, ein Durchgangsloch (9') umfasst, dessen Umriss auf der Zuführungsseite an den Umriss jedes Verteilungskanals (7, 7') in dem Verteilungskörper (3) angepasst ist und dass jeder ringförmige Abstandshalter (18), der mit dem Kolbenblock (14) verbunden ist, ein Durchgangsloch (18') umfasst, dessen Umriss auf der Ausstoßseite an den Umriss des Zuführungskanals (17) in dem Kolbenblock (14) angepasst ist.
  4. Verteilungssystem für einen hydraulischen Kolbenmotor nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Umriss des Durchgangslochs (9') in dem ringförmigen Abstandshalter (9) auf der Ausstoßseite und der Umriss des Durchgangslochs (18) in dem ringförmigen Abstandshalter (18) auf der Zuführungsseite an den Umriss der Öffnungen in jeder der Verteilungsplatten (10, 19) angepasst ist.
  5. Verteilungssystem für einen hydraulischen Kolbenmotor nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Verteilungsplatte (10) mit Verteilungsöffnungen (11) ausgebildet ist, deren radiale Position der radialen Position des Durchgangslochs (9') jedes ringförmigen Abstandshalters (9) gleicht, wobei der Umriss jedes Durchgangslochs (9') auf der Ausstoßseite jedes ringförmigen Abstandshalters (9) identisch zu dem Umriss der Verteilungsöffnung (11) ist, so dass die Durchgangslöcher (9') des ringförmigen Abstandshalters (9) und der Verteilungsöffnung (11) der Platte (10) vollständig zusammenfallen.
  6. Verteilungssystem für einen hydraulischen Kolbenmotor nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Verteilungsplatte (19) mit Verteilungsöffnungen (20) ausgebildet ist, deren radiale Position gleich der radialen Position des Durchgangslochs (18') in dem ringförmigen Abstandshalter (18) ist, wobei der Umriss jedes Durchgangslochs (18') auf der Zuführungsseite jedes ringförmigen Abstandshalters (18) identisch zu dem Umriss der Verteilungsöffnung (20) ist, so dass die Durchgangslöcher (18') des ringförmigen Abstandshalters (18) und der Verteilungsöffnung (20) der Platte (19) vollständig zusammenfallen.
  7. Verteilungssystem für einen hydraulischen Kolbenmotor nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Verteilungsplatten (10; 19) mittels Leimen bzw. Kleben, Löten oder ähnlichem in einer druckdichten Weise jeweils mit dem Verteilungskörper (3) und dem Kolbenblock (14) verbunden sind.
  8. Verteilungssystem für einen hydraulischen Kolbenmotor nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die ringförmigen Abstandshalter (9; 18) in einer druckdichten Weise jeweils mittels Leimen, Löten und ähnlichem mit dem Verteilungskörper (3) und dem Kolbenblock (14) ebenso wie mit der Verteilungsplatte (10; 19) verbunden sind.
EP04468002A 2004-01-23 2004-01-23 Verteilervorrichtung für einen hydraulischen Radialkolbenmotor Expired - Lifetime EP1557562B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT04468002T ATE434129T1 (de) 2004-01-23 2004-01-23 Verteilervorrichtung für einen hydraulischen radialkolbenmotor
DE602004021554T DE602004021554D1 (de) 2004-01-23 2004-01-23 Verteilervorrichtung für einen hydraulischen Radialkolbenmotor
EP04468002A EP1557562B1 (de) 2004-01-23 2004-01-23 Verteilervorrichtung für einen hydraulischen Radialkolbenmotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04468002A EP1557562B1 (de) 2004-01-23 2004-01-23 Verteilervorrichtung für einen hydraulischen Radialkolbenmotor

Publications (2)

Publication Number Publication Date
EP1557562A1 EP1557562A1 (de) 2005-07-27
EP1557562B1 true EP1557562B1 (de) 2009-06-17

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ID=34626580

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04468002A Expired - Lifetime EP1557562B1 (de) 2004-01-23 2004-01-23 Verteilervorrichtung für einen hydraulischen Radialkolbenmotor

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EP (1) EP1557562B1 (de)
AT (1) ATE434129T1 (de)
DE (1) DE602004021554D1 (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1319986A (fr) * 1962-04-20 1963-03-01 Angus George Co Ltd Perfectionnement aux pompes et moteurs hydrauliques
JPS4820082Y1 (de) * 1970-09-24 1973-06-09
SE456517B (sv) * 1982-09-08 1988-10-10 Hegglund & Soner Ab Hydraulisk radialkolvmotor
FR2701736B1 (fr) * 1993-02-19 1995-05-19 Poclain Hydraulics Sa Mécanisme à fluide sous pression comportant des plots tubulaires, tel qu'un moteur ou une pompe hydraulique.
DE19653591C1 (de) * 1996-12-20 1998-01-15 Korea Mach & Materials Inst Fluidverteilungsapparat für hydraulische Kolbenpumpen oder -motoren
FI109230B (fi) * 1999-12-08 2002-06-14 Metso Hydraulics Oy Radiaalimäntähydraulimoottori

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Publication number Publication date
ATE434129T1 (de) 2009-07-15
EP1557562A1 (de) 2005-07-27
DE602004021554D1 (de) 2009-07-30

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