EP0856638B1 - Machine à pistons radiaux réglable - Google Patents

Machine à pistons radiaux réglable Download PDF

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Publication number
EP0856638B1
EP0856638B1 EP97120962A EP97120962A EP0856638B1 EP 0856638 B1 EP0856638 B1 EP 0856638B1 EP 97120962 A EP97120962 A EP 97120962A EP 97120962 A EP97120962 A EP 97120962A EP 0856638 B1 EP0856638 B1 EP 0856638B1
Authority
EP
European Patent Office
Prior art keywords
piston machine
rotor
radial
engine
lifting ring
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
EP97120962A
Other languages
German (de)
English (en)
Other versions
EP0856638A1 (fr
Inventor
Wilhelm Dworak
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.)
Moog GmbH
Original Assignee
Moog GmbH
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
Application filed by Moog GmbH filed Critical Moog GmbH
Publication of EP0856638A1 publication Critical patent/EP0856638A1/fr
Application granted granted Critical
Publication of EP0856638B1 publication Critical patent/EP0856638B1/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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
    • F04B49/123—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members by changing the eccentricity of one element relative to another element
    • F04B49/128—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members by changing the eccentricity of one element relative to another element by changing the eccentricity of the cylinders, e.g. by moving a cylinder block
    • 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
    • F04B1/07—Control by varying the relative eccentricity between two members, e.g. a cam and a drive shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/10—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary
    • F04B1/107—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders
    • F04B1/1071—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders with rotary cylinder blocks

Definitions

  • the invention relates to an adjustable radial piston machine (Pump or motor) according to the Genus of claim 1.
  • Such radial piston machines are for example from the DE-A-3 433 289 is already known.
  • This Radial piston machine has an engine that by a rotatable rotor with radially arranged Working cylinders is formed. Are in the working cylinders Pistons movably guided on a cam ring, which the Support the rotor.
  • the cam ring is for adjustment the radial piston machine guided in the housing in a linearly movable manner and acts for this with a hydraulically loaded Piston / cylinder unit together. With appropriate Actuation of the piston / cylinder unit are between the cam ring and the rotor space and thus changed the operating parameters of the radial piston machine.
  • the disadvantage here is that the working cylinders generated during operation of the radial piston machine hydraulic forces on the rotor are not in balance are located. As a result, the bearing of the rotor with its Frictional force that affects mechanical efficiency the radial piston machine deteriorated. Furthermore leads the frictional force to a temperature load or to a Wear, which in extreme cases for eating or mechanical destruction of the engine components.
  • the adjustable radial piston machine with the characterizing features of claim 1 has a rotor on which the attacking hydraulic forces keep the balance. As a result, almost no frictional force is generated at the bearing point of the rotor, which improves the mechanical efficiency of the radial piston machine. Furthermore, thermal stress and wear on the engine of the radial piston machine are largely avoided.
  • a cam ring which is arranged concentrically to the rotor and which is pivotally mounted about its axis of symmetry for its adjustment. The pivoting movement is controlled by a piston / cylinder unit, which is arranged transversely to the cam ring, which makes the radial piston machine much narrower. Such a pivoting movement of the cam ring divides a rotor revolution into two successive working strokes for the working cylinders, so that the swallowing or delivery volume of the radial piston machine is doubled with unchanged size.
  • Figure 1 shows this in a simplified representation adjustable engine of an inventive Radial piston machine in longitudinal section
  • Figure 2 is a Cross-section of the engine along section line II-II shown schematically in FIG.
  • FIG. 1 shows a simplified representation of the engine 10 of a radial piston machine in longitudinal section, the illustration of a housing of the radial piston machine, in the interior of which the engine 10 is normally arranged, has been omitted for the sake of simplicity.
  • One of the essential assemblies of the engine 10 is a rotor 11, which has continuous radial bores which form cylinders 12.
  • the rotor 11 has an even number of cylinders 12, but this is not absolutely necessary.
  • Working pistons 13 are movably guided in the cylinders 12.
  • the rotor 11 is rotatably supported with its hub 14 on a control pin 15, which is arranged in a manner not shown in the stationary manner in the housing of the radial piston machine.
  • inlet and outlet channels 16 are formed, which end in circumferential control slots 17a-d.
  • These upstream and downstream control slots 17a-d arranged alternately one behind the other in the area of the bearing point of the rotor 11 interact with and control the rotating cylinders 12.
  • the rotor 11 is driven or driven via a shaft (not shown) on the housing which is connected to the rotor 11 by a clutch 18 in a rotationally fixed manner.
  • a centrifugal force acting on the working piston 13 due to the rotary movement of the rotor 11 causes the working piston 13 to rest against a cam ring 19 with its ends facing away from the control pin 15.
  • the cam ring 19 is arranged concentrically with the rotor 11 and surrounds it circumferentially.
  • the cam ring 19 has on its outer circumference two radially projecting bearing pins 20 (FIG. 2) which are arranged in the direction of a transverse axis Q, which is also an axis of symmetry of the cam ring 19.
  • These journals 20 permit a pivoting movement of the lifting ring 19 about the transverse axis Q, the maximum pivoting angle W of which is matched to the diameter of the working piston 13 by the width of the lifting ring 19 such that it is preferably approximately twice the diameter of the working piston 13 , is limited.
  • the instantaneous swivel angle W depends on the current operating conditions of the radial piston machine and is regulated by an adjusting device 22 arranged axially in the housing.
  • this adjusting device 22 can be controlled mechanically, electromechanically, pneumatically or hydraulically and, as the actuating element, has a tappet 23 which acts on the end face of the circumferential cross section of the cam ring 19.
  • the lifting ring 19 is reset by a spring device (not shown), which at the same time ensures that the lifting ring 19 rests securely on the tappet 23 of the adjusting device 22.
  • FIG. 2 shows the engine 10 described above in a cross section, on the basis of which the mode of operation of the radial piston machine is explained below.
  • the inner wall of the cam ring 19 from the rotor 11 has a distance A which is dependent on the instantaneous angle of rotation of the rotor 11 and which changes periodically in the course of a rotor revolution ,
  • the distance A assumes minimum values and in the direction of the vertical axis H running perpendicular to the transverse axis Q maximum values. Accordingly, the working piston 13 is forced two periodic strokes during a rotor revolution, each of which extends over 180 degrees. The maximum stroke of these stroke movements is determined by the size of the swivel angle W.
  • the two identical lifting movements per revolution of the rotor 11 have their inner reversal points in the direction of the transverse axis Q and their outer reversal points in the direction of the vertical axis H.
  • the cylinders 12 are coupled to an inlet or outlet channel 16 via the control slots 17a-d in coordination with the direction of movement of their working pistons 13.
  • the control slots 17a-d were arranged on the control pin 15 in such a way that two opposing cylinders 12 are each subjected to the same pressure level. Partitions 24 between the control slots 17a-d, together with the hub 14 of the rotor 11, serve for the sealing separation between the inlet and outlet channels 16.
  • the lifting movements of the working piston 13 thus allow a pressure medium flow from the inlet to the outlet channel 16 or vice versa, during which pressure energy is given or removed from the pressure medium depending on the operating mode of the radial piston machine as a pump or motor and converted into a drive torque.
  • the dimension of the displaced pressure medium depends on the current operating conditions of the radial piston machine and can be regulated via the swivel angle W of the lifting ring 19 (FIG. 1). Since two opposing cylinders 12 are always subjected to an identical pressure level during their stroke movements, the hydraulic forces generated on the rotor 11 have the same amount, but opposite directions of action. The rotor 11 thus rotates in a force-balanced manner on the control pin 15, so that frictional forces which promote wear and reduce efficiency are avoided.

Landscapes

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

Claims (6)

  1. Machine à pistons radiaux réglable (pompe ou moteur) comprenant :
    un boítier recevant un mécanisme (10) composé d'un rotor (11) solidaire en rotation d'un arbre dépassant vers l'extérieur, et percé de cylindres (12) disposés radialement, dans lesquels coulissent des pistons de travail (13),
    un tourillon de commande (15) monté fixe sur lequel peut tourner le rotor, ce tourillon comportant chaque fois au moins un canal d'amenée et un canal de sortie (16) débouchant dans des rainures de commande (17a-d),
    un anneau de course (19) entourant le rotor (11) concentriquement, sur lequel s'appuient les pistons de travail (13) et qui coopère avec un dispositif de réglage (22), pour régler la machine,
    caractérisée en ce que
    l'anneau de course (19) est monté de manière à pouvoir basculer autour d'un de ses axes de symétrie (Q, H).
  2. Machine à pistons radiaux (pompe ou moteur) selon la revendication 1,
    caractérisée en ce que
    l'anneau de course (19) basculant présente à sa périphérie des pivots de palier (20), disposés face à face.
  3. Machine selon l'une quelconque des revendications 1 ou 2,
    caractérisée en ce que
    le dispositif de réglage (22) agissant sur l'anneau de course (19) est monté parallèlement à l'axe de l'anneau (19) et agit sur la face frontale de l'anneau (19).
  4. Machine selon la revendication 3,
    caractérisée en ce que
    la commande du dispositif de réglage (22) est mécanique, électromécanique, pneumatique ou hydraulique.
  5. Machine selon l'une quelconque des revendications 1 à 4,
    caractérisée en ce que
    le rotor (11) de la machine à pistons radiaux comporte en particulier un nombre pair de cylindres (12) présentant entre eux le même espacement angulaire, les cylindres opposés (12) deux à deux fonctionnant avec un niveau identique de pression quand le rotor (11) tourne.
  6. Machine selon l'une quelconque des revendications 1 à 5,
    caractérisée en ce que
    le tourillon de commande (15) de la machine à pistons radiaux comporte des paires de canaux d'amenée et de sortie (16) se succédant alternativement dans la direction de rotation du rotor (11).
EP97120962A 1997-01-29 1997-11-28 Machine à pistons radiaux réglable Expired - Lifetime EP0856638B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19703155A DE19703155C2 (de) 1997-01-29 1997-01-29 Verstellbare Radialkolbenmaschine
DE19703155 1997-01-29

Publications (2)

Publication Number Publication Date
EP0856638A1 EP0856638A1 (fr) 1998-08-05
EP0856638B1 true EP0856638B1 (fr) 2002-07-17

Family

ID=7818651

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97120962A Expired - Lifetime EP0856638B1 (fr) 1997-01-29 1997-11-28 Machine à pistons radiaux réglable

Country Status (3)

Country Link
US (1) US5878648A (fr)
EP (1) EP0856638B1 (fr)
DE (2) DE19703155C2 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19843120C1 (de) * 1998-09-21 1999-12-30 Bosch Gmbh Robert Verstellbare Radialkolbenmaschine
US6916158B2 (en) * 2003-04-30 2005-07-12 Actuant Corporation Radial piston pump
CN101048594A (zh) * 2004-10-28 2007-10-03 诺信公司 旋转泵
GB0508107D0 (en) * 2005-04-22 2005-06-01 Univ Liverpool A pump
US7444989B2 (en) * 2006-11-27 2008-11-04 Caterpillar Inc. Opposed pumping load high pressure common rail fuel pump
GB2456809A (en) * 2008-01-24 2009-07-29 Tom Oswald Compressor
DE102009054876A1 (de) * 2009-12-17 2011-06-22 ZF Friedrichshafen AG, 88046 Verfahren zur Bestimmung des Schluckvolumens einer Radialkolbenmaschine
NL2004121C2 (en) * 2010-01-20 2011-07-21 Ceratec Ceramic Bearings B V Dispensing system and method for dispensing a fluid.
NL2024476B1 (en) * 2019-12-17 2021-09-02 Delft Offshore Turbine B V Turbine and multi piston pump

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE659943C (de) * 1934-05-22 1939-01-19 Elek K Benedek Dr Sternkolbenpumpe
GB1408861A (en) * 1971-12-23 1975-10-08 Lucas Industries Ltd Rotary hydraulic machines
DE3433289A1 (de) * 1984-09-11 1986-03-20 Rudolf 7031 Holzgerlingen Bock Hydraulische radialkolbenmaschine
JPS61142373A (ja) * 1984-12-13 1986-06-30 Nippon Denso Co Ltd 可変容量ポンプ
GB2254373A (en) * 1991-04-03 1992-10-07 Echarren Uzabel Ricardo Rotary cylinder i.c.engine,pump or compressor.
DE4143152C2 (de) * 1991-12-28 2001-08-23 Bosch Gmbh Robert Radialkolbenmaschine
US5651301A (en) * 1994-12-13 1997-07-29 Unipat Aktiengessellschaft Hydrostatic piston machines

Also Published As

Publication number Publication date
US5878648A (en) 1999-03-09
EP0856638A1 (fr) 1998-08-05
DE19703155A1 (de) 1998-07-30
DE19703155C2 (de) 1999-01-07
DE59707727D1 (de) 2002-08-22

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