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EP1272735B1 - Machine a piston radiaux - Google Patents

Machine a piston radiaux Download PDF

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Publication number
EP1272735B1
EP1272735B1 EP01927816A EP01927816A EP1272735B1 EP 1272735 B1 EP1272735 B1 EP 1272735B1 EP 01927816 A EP01927816 A EP 01927816A EP 01927816 A EP01927816 A EP 01927816A EP 1272735 B1 EP1272735 B1 EP 1272735B1
Authority
EP
European Patent Office
Prior art keywords
sections
radial piston
piston machine
control
accordance
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
EP01927816A
Other languages
German (de)
English (en)
Other versions
EP1272735A1 (fr
Inventor
Chris Shrive
Sinclair SUC Design Ltd. Cunningham
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.)
Bosch Rexroth AG
Original Assignee
Bosch Rexroth AG
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 claimed from DE10033264A external-priority patent/DE10033264A1/de
Application filed by Bosch Rexroth AG filed Critical Bosch Rexroth AG
Publication of EP1272735A1 publication Critical patent/EP1272735A1/fr
Application granted granted Critical
Publication of EP1272735B1 publication Critical patent/EP1272735B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B13/00—Reciprocating-piston machines or engines with rotating cylinders in order to obtain the reciprocating-piston motion
    • F01B13/04—Reciprocating-piston machines or engines with rotating cylinders in order to obtain the reciprocating-piston motion with more than one cylinder
    • F01B13/06—Reciprocating-piston machines or engines with rotating cylinders in order to obtain the reciprocating-piston motion with more than one cylinder in star arrangement
    • F01B13/061—Reciprocating-piston machines or engines with rotating cylinders in order to obtain the reciprocating-piston motion with more than one cylinder in star arrangement the connection of the pistons with the actuated or actuating element being at the outer ends of the cylinders
    • 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
    • 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
    • F04B1/047—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the outer ends of the cylinders

Definitions

  • the invention relates to a radial piston machine according to the preamble of claim 1.
  • a radial piston machine is known from DE 40 049 32 C2 known in which a cylinder block with a variety of in the radial direction arranged cylinder spaces rotatable in is housed in a housing. There is one in each cylinder space Piston guided, its protruding from the cylinder block End portion is supported on a cam ring. This lifting ring has a variety of control cams that are used in the Rotation of the cylinder block is a radial displacement of the Piston takes place.
  • Inlet and return channels designed for pressure medium designed for pressure medium, alternately with tax breaks in the cylinder block can be brought into overlap via which the pressure medium supply and discharge to and from the cylinder rooms controllable is.
  • the invention is based on the object to create a radial piston machine with minimal Flow losses and minimal manufacturing effort is producible.
  • the end face sections of tax breakthroughs or muzzle cross sections in the cylinder block of the Radial piston machine formed by two holes are therefore with curved end faces executed, with the end faces in the radial direction inner or outer peripheral surface sections be understood.
  • Such curved end faces are much easier than those from the EP 0 263 218 A1 known straight end face sections produce so that the manufacturing Effort is minimized.
  • Such a tax cross section is due to the extension of the tax breakthrough in the radial direction adaptable without increasing it the width (transverse to the radial direction).
  • the radius of curvature of the radially inner end face section is preferably less than that of the radially outer end face section executed.
  • the manufacture of the breakthroughs is particularly simple, if the two holes overlap each other so that the Breakthroughs simply by making the two holes can be executed and then an approximately eight-shaped Have cross-section.
  • the curved end faces are connected to each other via tangential surfaces. at the intersection lies at different radii of curvature of the two tangential surfaces in the axis of symmetry of the radially inwardly tapering control cross section lies.
  • Manufacturing is particularly simple if the geometry the control breakthroughs on the cylinder block and of the mouth cross sections on the housing are chosen identically is. As mentioned above, it is preferred that the mouth cross-sections and the tax breakthroughs are executed with zero overlap with each other, so that the fastest possible opening and closing of the connection to the cylinder rooms is guaranteed.
  • FIG. 1 shows a greatly simplified sectional view a radial piston engine 1, which works on the multi-stroke principle is constructed.
  • This radial piston motor 1 has one Housing 2, on which a cam ring 4 is screwed.
  • An output shaft 6 is mounted within the housing 2, which has an external toothing with a rotor trained cylinder block 8 is connected.
  • eight cylinder bores 10 formed in which a piston 12 is guided radially displaceable.
  • a cylinder space 16 can be fed into the pressure medium.
  • To the end portion of each piston distant from the cylinder space 16 12 is a roller 18 which is supported during the rotational movement of the cylinder block 8 on a cam 20 of the lifting ring 4.
  • control cam 20 with 6 radially projecting control cams 22 executed.
  • the pistons 12 are radially inward Moved towards their dead center.
  • Between two adjacent control cams 22 are each a valley 24 trained so that the piston 12 in the apex of the Valleys 24 are at their outer dead center, in which the Cylinder space has its maximum volume.
  • Each of the cylinder spaces 16 is one in the cylinder block 8 trained tax breakthrough 26 assigned by the pressure medium supplied depending on the piston position or is dissipated.
  • eight control breakthroughs according to the number of pistons 26 distributed on a pitch circle around the circumference.
  • Control housing 30 which is covered by the cylinder block 8 is only dashed with its inner and outer circumference shown.
  • inlet and drain channels 32, 34 formed in the Representation according to Figure 1 also only dashed are indicated.
  • control cams 22 each have six inlet channels 32 and six drain channels 34, which alternately evenly a pitch circle are distributed, the diameter of which of the pitch circle of the control cross sections 26 corresponds.
  • FIG. 1 it should be noted that that the 45 ° to the horizontal or vertical muzzle cross sections of the inlet and outlet channels 32, 34 by those shown with a solid line Tax breakthroughs 26 are covered.
  • the inlet channels are open to a first ring channel, the radially between the control housing 30 and is the housing 2 and with an inlet connection on Housing 2 is connected, and the drain channels 34 are open to a second ring channel that extends axially to the first Ring channel spaced, also radially between the Control housing 30 and the housing 2 is located and with a Drain connection on the housing 2 is connected.
  • Such the mouth cross sections training control disks are easier can be manufactured as bores or cutouts in the housing 2 or in the cylinder block 8.
  • FIGS. 2 and 3 show the geometric relationships of a control breakthrough 26 and the associated opening cross section of an inlet and an outlet channel 32, 34.
  • the mouth cross-sections 36, 38 of the channels 32 and 34 as well as the control openings 26 are designed with an identical geometry, which is described with reference to FIG. 3.
  • the end face sections 40, 42 arranged diametrically to one another in the radial direction are each designed with a radius of curvature r 2 or r 1 , the radius of curvature r 2 of the radially outer end face section 40 being greater than the radius of curvature r 1 of the radially inner end face section.
  • both end faces 40, 42 can be designed with identical radii r.
  • Such a breakthrough 26 (32, 34) is extreme easy to manufacture because, for example, the two end face sections 42, 40 formed by bores and then the tangential surfaces 44, 46 can be manufactured by milling or the like.
  • the Geometries and the distance between two neighboring cross sections 36, 38 selected such that in the illustrated Relative position in between is a tax breakthrough 26 can be arranged with zero coverage.
  • the side surfaces 44, 46 are in this relative position of the control breakthrough 26 in the axial direction the adjacent side faces of the adjacent mouth cross sections 36, 38 arranged. That is, the one in this Relative position is neither a pressure medium supply nor a pressure medium discharge to or from the assigned Cylinder chamber 16.
  • FIG. 4 shows a simplified exemplary embodiment, in which the production outlay for the control breakthroughs 26 or the mouth cross sections 36, 38 is further minimized compared to the previously described exemplary embodiment.
  • the end face sections 40, 42 are formed by two bores with the radius r 1 and r 2 , similarly to the above-described exemplary embodiment.
  • the axial distance d between the two bores is less than the sum r 1 + r 2 , so that the two bores overlap one another.
  • the result is an approximately eight-shaped mouth cross section, the inwardly projecting side surfaces not being reworked as in the exemplary embodiment described above.
  • the simplified manufacture is purchased with a slower opening and closing of the inlet and outlet channels 32, 34.
  • the overlap of the two holes requires that the distance d is smaller than the dimension 2 r 1 (2 r 2 ).
  • This variant can be produced, for example, in a simple manner by drilling, with no reclamping of the drill as in the exemplary embodiment shown in FIG. 4 being necessary.
  • the distance d between the two bore centers is greater than the sum of the two radii 2 r 1 (2 r 2 ), so that there is no overlap area.
  • the two bore sections are then connected, as in the embodiment shown in FIG. 3, by tangentially extending side surfaces 44, 46, so that there is practically an elongated hole whose width is equal to the diameter r 1 .
  • the control breakthroughs 26 are therefore not tapered in the radial direction.
  • cross sections described above also by processing methods other than Drilling, such as milling, wire EDM or EDM getting produced.
  • the area of the opening cross-sections can be determined by suitable Choice of the distance d between the end face sections adapted to different requirements be, the or the hole diameter practical remain unchanged so that zero coverage is guaranteed is.
  • a radial piston machine with several, radial pistons guided in a cylinder space, the cylinder rooms via control breakthroughs with inlet or drainage channels for pressure medium can be connected.
  • the mouth cross-sections of the tax breakthroughs and the Inlet and outlet channels are with curved end face sections Mistake.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Claims (8)

  1. Machine à pistons radiaux comprenant un bloc-cylindres (8) logé dans un carter (2) dans lequel sont logés une multitude de pistons (12) conduits dans des chambres de cylindre (16) et appuyés contre une bague de levage (4), et comprenant une multitude de passages de commande (26) côté bloc-cylindres, qui pour commander l'alimentation et l'évacuation peuvent être mis en recouvrement avec des sections transversales d'embouchures (36, 38) des canaux d'alimentation et d'évacuation (32, 34) côté carter, les passages de commande (26) et/ou les sections transversales d'embouchures (36, 38) présentant des zones de faces frontales (40, 42) cintrées et une étendue longitudinale plus grande que transversale à celles-ci, caractérisée en ce que les zones de face frontale (40, 42) sont formées par deux perçages.
  2. Machine à pistons radiaux selon la revendication 1, le rayon de courbure central (r2) de la zone de face frontale (40) radialement extérieure étant supérieur à celui de la zone de face frontale (42) intérieure.
  3. Machine à pistons radiaux selon la revendication 1 ou 2, les points centraux de courbure étant éloignés les uns des autres de moins que la somme de rayons de courbure (r1 + r2) des perçages.
  4. Machine à pistons radiaux selon l'une quelconque des revendications précédentes, les zones de face frontale (40, 42) étant reliées les unes aux autres par des faces latérales (44, 46) s'étendent de manière sensiblement tangentielle à celles-ci.
  5. Machine à pistons radiaux selon l'une quelconque des revendications 1 à 3, les passages de commande (26) et/ou les sections transversales d'embouchure (36, 38) n'étant formés que par deux perçages.
  6. Machine à pistons radiaux selon l'une quelconque des revendications précédentes, la géométrie des passages de commande (26) et des sections transversales d'embouchure (36, 38) étant identique.
  7. Machine à pistons radiaux selon l'une quelconque des revendications précédentes, les passages de commande (26) et/ou les sections transversales d'embouchure (36, 38) étant respectivement formés sur un disque de commande qui est fixé côté frontal au bloc-cylindres (8) ou au carter (2).
  8. Machine à pistons radiaux selon l'une quelconque des revendications précédentes, les passages de commande (26) et les sections transversales d'embouchure (36, 38) étant conçus sans recouvrement.
EP01927816A 2000-04-11 2001-03-27 Machine a piston radiaux Expired - Lifetime EP1272735B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10017951 2000-04-11
DE10017951 2000-04-11
DE10033264A DE10033264A1 (de) 2000-04-11 2000-07-10 Radialkolbenmaschine
DE10033264 2000-07-10
PCT/EP2001/003480 WO2001077495A1 (fr) 2000-04-11 2001-03-27 Machine a piston radiaux

Publications (2)

Publication Number Publication Date
EP1272735A1 EP1272735A1 (fr) 2003-01-08
EP1272735B1 true EP1272735B1 (fr) 2004-11-10

Family

ID=26005271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01927816A Expired - Lifetime EP1272735B1 (fr) 2000-04-11 2001-03-27 Machine a piston radiaux

Country Status (3)

Country Link
US (1) US6843162B2 (fr)
EP (1) EP1272735B1 (fr)
WO (1) WO2001077495A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2892775B1 (fr) * 2005-10-27 2010-11-05 Poclain Hydraulics Ind Moteur hydraulique a pistons radiaux avec refroidissement du bloc-cylindres
CA2804091C (fr) * 2010-07-06 2015-10-13 Larry Sydney Oliver Ampuero Moteur a combustion interne
US8997627B2 (en) * 2011-04-29 2015-04-07 Paul Michael Passarelli Thermal engine with an improved valve system
FR3030645B1 (fr) * 2014-12-17 2019-10-11 Poclain Hydraulics Industrie Appareil hydraulique a pistons radiaux
CN105508166B (zh) * 2016-01-26 2018-02-06 机械科学研究总院 动外壳式空气弹簧径向柱塞泵
CN112576469B (zh) * 2020-11-16 2022-12-16 中国航发西安动力控制科技有限公司 内曲线径向柱塞马达的柱塞滚柱

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE263218C (fr) *
DE900530C (de) 1951-06-30 1953-12-28 Heinrich Ebert Dr Ing Steuerspiegel fuer die Kolbentrommel hydraulischer Axialkolbenmaschinen mit ungerader Kolbenanzahl
FR1594838A (fr) * 1967-11-23 1970-06-08
US3511131A (en) * 1968-06-24 1970-05-12 Deere & Co Hydraulic motor
DE2444040A1 (de) 1974-09-14 1976-04-01 Danfoss As Radialkolbenmaschine
DE3434350A1 (de) 1984-09-19 1986-03-27 A. Friedr. Flender Gmbh & Co Kg, 4290 Bocholt Hydrostatische radialkolbenmaschine
FR2587761B1 (fr) * 1985-09-20 1988-01-15 Poclain Hydraulics Sa Mecanisme hydraulique comportant des glace et contre-glace de distribution du fluide
FR2588616B1 (fr) * 1985-10-16 1988-01-08 Poclain Hydraulics Sa Mecanisme, moteur a pompe, a au moins deux cylindrees actives distinctes.
DE3668038D1 (de) * 1986-10-08 1990-02-08 Poclain Hydraulics Sa Fluessigkeitsmechanismus mit fluidverteilscheibe und gegenscheibe.
FI104014B (fi) * 1994-05-18 1999-10-29 Valmet Voimansiirto Oy Radiaalimäntähydraulimoottori ja menetelmä radiaalihydraulimoottorin säätämiseksi
SE506582C2 (sv) * 1996-04-03 1998-01-12 Kesol Production Ab Anordning vid en radialkolvmotor av rotationstyp

Also Published As

Publication number Publication date
US20030159578A1 (en) 2003-08-28
US6843162B2 (en) 2005-01-18
WO2001077495A1 (fr) 2001-10-18
EP1272735A1 (fr) 2003-01-08

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