WO1986000662A1 - Ameliorations apportees aux machines a piston - Google Patents

Ameliorations apportees aux machines a piston Download PDF

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Publication number
WO1986000662A1
WO1986000662A1 PCT/GB1985/000315 GB8500315W WO8600662A1 WO 1986000662 A1 WO1986000662 A1 WO 1986000662A1 GB 8500315 W GB8500315 W GB 8500315W WO 8600662 A1 WO8600662 A1 WO 8600662A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
cylinder
axis
ring member
machine
Prior art date
Application number
PCT/GB1985/000315
Other languages
English (en)
Inventor
Russell John Searle
Original Assignee
Russell John Searle
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 Russell John Searle filed Critical Russell John Searle
Publication of WO1986000662A1 publication Critical patent/WO1986000662A1/fr

Links

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
    • F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/0082—Details
    • F01B3/0085—Pistons
    • 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
    • F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/0032—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • 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
    • F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/0032—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F01B3/0076—Connection between cylinder barrel and inclined swash plate

Definitions

  • This invention relates to piston machines of the kind in which an assembly of cylinders is arranged equidistantly around a first axis of rotation and a co-operating assembly of corresponding pistons is arranged equidistantly around a second axis of rotation that is fixedly or variably inclined to the first axis of rotation.
  • Piston machines of this known kind can function either as pumps or motors and examples thereof are described in GB-A-1511232 and other prior documents.
  • each piston is formed with a groove that accommodates a piston ring exhibiting an outer part-spherical surface whose diameter is substantially equal to that of the co-operating cylinder, the ring being movable laterally in the groove to enable it to be displaced rectilinearly in the cylinder whereas the piston which carries it follows an arcuate curvilinear path.
  • a piston machine in which an assembly of cylinders is arranged equi-distantly around a first axis of rotation and an assembly of corresponding pistons is arranged equi-distantly around a second axis of rotation that is fixedly or variably inclined to the first axis of rotation , each piston comprising a ring member that is displaceable laterally of the piston itself to enable that ring member to move substantially rectilinearly of the corresponding cylinder whilst the piston itself moves through a curved path relative thereto, characterised in that the working volume defined by each piston and corresponding cylinder communicates via an open end of that cylinder or via a passage through the piston itself, with a surface relative to which the piston or the cylinder is movable during the use of the machine, whereby, during such use, positive or negative fluid pressure on that piston or cylinder is at least partially transferred to said surface.
  • Figure 1 is a somewhat diagrammatic sectional view of a piston machine in accordance with the invention which could be used as either a pump or as a motor, and
  • Figure 2 is a somewhat diagrammatic sectional side elevation illustrating one piston, its co-operating cyli'nder and adjacent parts of an alternative piston machine constructed in accordance with the invention.
  • an assembly of cylinders in the form of a cylinder block 1 is rotatably mounted around a first axis x that is defined by a spigot 2 formed centrally of an angularly displaceable but non-rotatable carrier 3.
  • the assembly of cylinders in the cylinder block 1 comprises a plurality of those cylinders that are spaced by equal distances from the first axis x and that are equi-angularly spaced apart from one another considered rotationally around that axis x.
  • a plurality of pistons 4 whose number is equal to that of the cylinders in the block 1 have their base ends fixedly secured to a rotor 5 that is integral with, or fixedly secured to, a shaft 6 which is rotatable, together with the pistons 4, around a second axis v chat is both co-planar with, and usually, for operation, non-perpendicularl inclined co , th first axis x.
  • a housing 7 surrounds the cylinder block 1, the assembly of pistons 4, the rotor 5 and part of the shaft 6, bearings 8 rotatably mounting the shaft 6 in the housing 7 so that the left hand end of that shaft 6, as seen in Figure 1, projects from the housing 7 to be driven, if the piston machine is a pump, or to provide drive if the piston machine is a motor.
  • Each piston 4 has a body formed with a broad circumscribing groove in which a ring member 4A is received.
  • the ring member 4A is " in the shape of a thick equatorial slice of spherical external curvature and always makes sealing contact with the interior of the corresponding straight-sided cy.linder 1, during operation, even though each piston 4, as a whole, moves through a curvilinear path relative to that cylinder 1. This is possible because the diameter of the groove in the piston body is significantly less than is the internal diameter of the ring member 4A thus allowing said ring member 4A to move laterally in that groove.
  • the resilient element 4B may be a layer of a resilient elastomeric material or a resiliently constructed ring.
  • the resilient elements 4B considerably reduce, if not entirely eliminate, the shock loading which takes place during the periodic take-up of drive torque by each piston 4 in turn.
  • at least one of the ring members 4A is always in drive-transmitting contact with its piston 4 via the respective resilient element 4B.
  • banana port 10 is in communication with an inlet or outlet duct 13 that serves for the inlet or outlet of a fluid to, or fluid from, the working volumes defined between the successive pistons 4 and corresponding cylinders depending upon whether the piston machine is used as a motor or as a pump.
  • each cylinder is in open communication with an annular surface 14 of the angularly displaceable but non-rotatable carrier 3, such communication being by way of a frusto-conically tapered or, alternatively, stepped, portion 15 of the cylinder concerned.
  • each piston 4 and corresponding cylinder are movable relative to this surface 14 during the use of the machine and consequently, during such use, a major portion of any positive or negative pressure i.n the cylinder is transferred to said surface 14.
  • the axes x and y_ intersect at a point 16 and external means which is not illustrated is employable to displace the carrier 3 angularly, but not rotatably, about an axis which contains the point 16 and that is perpendicular tc the plane of Figure 1, the cylinder block 1 which is rotatably mounted on the carrier 3 having its plane of rotation similarly moved by any angular displacement of the carrier 3.
  • Such aisolacement changes the inclination of the first axis x to that of the second axis y_ and thus enables the working or swept volumes defined by the pistons 4 and their co-operating cylinders to be varied between a maximum value and a minimum value of non-displacement when, in a central position ⁇ the axis x coincides with the axis v.
  • Angular displacement in the opposite direction is possible so that the effective rotation of the piston machine may be reversed.
  • a single composite piston 17A and a co-operating single cylinder 18 are illustrated, the composite piston 17A comprising a larger cup member that is indicated 17 and a co-operating smaller cup member 21 which together surround a principally spherical ball 19 at one end of a tubular piston rod 20.
  • Each piston 17A also comprises a surrounding straight-sided ring member 24 which is a close axially slidable fit in the co-operating straight-sided cylinder 18.
  • the ring member 24 has an end wall in which a central aperture 25 is formed and that, towards its opposite end and around the piston rod 20, a thrust washer 22, whose external diameter is the same as the internal diameter of the ring member 24, is maintained in position by an internal circlip 23 whose external edge is entered in a groove in the internal surface of the member 24.
  • the cup members 17 and 21 of the single composite piston are trapped between the end wall of the casing 24 and one side of the thrust washer 22 but have a common external diameter which is significantly less than the internal diameter of the ring member 24 thus allowing them to snift laterallv msid tne rin ⁇ member 24.
  • the amount of clearance is sufficient to enable the external surfaces of the ring members 24 to move laterally of the corresponding balls 19 to the extent required to allow for the rectilinear movements of the ring members 24 in the cylinders 18 as compared with the curvilinear movements of the cup members 17 and 21 that surround the balls 19.
  • the cylindrical outer surfaces of the cup members 17 and 21 are provided with a resilient element 29 considerably to reduce, if not entirely eliminate, the shock loading which would otherwise take place due to the periodic take-up of drive torque by each piston in turn.
  • At any instant during operation at least one r-ing member 24 is in drive-transmitting contact with its piston via the respective resilient element 29 which latter may be a resilient elastomeric layer or a resiliently constructed ring.
  • Each cylinder 18 has a closed end which provides a surface 26 that is in communication with the working volume defined by that cylinder 18 and the co-operating composite piston and that working volume (which is shown in the position illustrated in Figure 2 as being at a minimum) also communicates via the central aperture 25 in the ring member 24 with a tubular passage through the piston rod which passage is designated 27 in Figure 2. As in the embodiment of Figure 1 of the drawings, this passage 27 periodically communicates, when the machine is in use, with ducts for the supply of fluid to, and the exhaust of fluid from, the working volume defined by each cylinder 18 and the corresponding composite piston 17A.
  • each piston rod 20 could be solid and means could be provided for the supply and exhaust of fluid through ports in the end walls of the cylinders 18 and through a surrounding non-rotatable block or housing 28. It will be apparent that each composite piston and corresponding cylinder 18 communicate via an ooen end of that cylinder (as iust 1 described) , or via the passage 27 through the composite piston 17A itself, with the surface 26 relative to which both the composite piston 17A and the cylinder 18 are movable during the use of the machine, whereby, during 5 such use, thrust reaction on at least the composite piston 17A is largely transferred to said surface 26.

Landscapes

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

Abstract

Machine à piston du genre où un assemblage (1) de cylindres est disposé de manière équidistante autour d'un premier axe de rotation (x) et un assemblage de pistons correspondant (4) est disposé de manière équidistante autour d'un second axe de rotation (y) qui est fixe ou est incliné de manière variable par rapport au premier axe de rotation (x), chaque piston (4) comprenant une bague (4A) pouvant se déplacer latéralement par rapport au piston lui-même pour que la bague (4A) puisse de déplacer sensiblement de manière rectiligne par rapport au cylindre correspondant tandis que le piston lui-même se déplace sur un chemin courbe par rapport à celui-ci. Chaque cylindre (1) communique, via une portion conique ou étagée (15) de celui-ci, avec une surface annulaire (14) d'un dispositif de support non rotatif (3) de l'assemblage (1) de cylindres de sorte que, lorsqu'une pression positive ou négative existe dans le volume de travail défini par chaque cylindre (1) et chaque piston correspondant (4), la réaction de poussée est largement transférée sur la surface annulaire (14) du dispositif de support (3). Chaque piston (4) possède un passage (11) traversant qui communique de manière répétée, pendant l'utilisation de la machine, avec les conduits d'admission et de sortie (13) au moyen de lumières en forme de banane (10) aménagées dans la surface d'étanchéité (9) entre un rotor (5) qui porte les pistons (4) et une enceinte (7) de la machine. Des éléments résilients (4B) sont interposés entre les bagues (4A) et les pistons eux-mêmes qu'ils entourent pour empêcher les chocs périodiques se produisant lors du fonctionnement.
PCT/GB1985/000315 1984-07-12 1985-07-12 Ameliorations apportees aux machines a piston WO1986000662A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8417816 1984-07-12
GB848417816A GB8417816D0 (en) 1984-07-12 1984-07-12 Piston machines

Publications (1)

Publication Number Publication Date
WO1986000662A1 true WO1986000662A1 (fr) 1986-01-30

Family

ID=10563804

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1985/000315 WO1986000662A1 (fr) 1984-07-12 1985-07-12 Ameliorations apportees aux machines a piston

Country Status (3)

Country Link
EP (1) EP0189452A1 (fr)
GB (1) GB8417816D0 (fr)
WO (1) WO1986000662A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994010443A1 (fr) * 1992-10-30 1994-05-11 Felice Pecorari Machine volumetrique pour fluides equipee de pistons sans bielles
GB2278649A (en) * 1993-05-20 1994-12-07 Wolfhart Willimczik Rotary piston machines
US5636561A (en) * 1992-10-30 1997-06-10 Felice Pecorari Volumetric fluid machine equipped with pistons without connecting rods
WO2007009811A2 (fr) * 2005-07-21 2007-01-25 Brueninghaus Hydromatik Gmbh Moteur a pistons hydrostatique fonctionnant selon le principe de la coupelle flottante presentant une surface d'appui contre une plaque support
WO2007014709A1 (fr) * 2005-08-04 2007-02-08 Bosch Rexroth Ag Machine a pistons axiaux
US20100018495A1 (en) * 2006-12-29 2010-01-28 Yau Cheung Kwok Gyroscopic Rotary Engine
WO2014191654A1 (fr) * 2013-05-30 2014-12-04 Technoboost Procédé et dispositif de contrôle/commande d'un module hydraulique pour véhicule hybride
EP3150852A1 (fr) * 2015-10-01 2017-04-05 Volvo Car Corporation Bague d'étanchéité, un agencement de cylindre et ensemble de moteur/de pompage
EP3246565A1 (fr) * 2016-05-19 2017-11-22 Innas B.V. Dispositif hydraulique
US10830221B2 (en) 2016-05-19 2020-11-10 Innas Bv Hydraulic device, a method of manufacturing a hydraulic device and a group of hydraulic devices
US10914172B2 (en) 2016-05-19 2021-02-09 Innas Bv Hydraulic device
DE102020116656A1 (de) 2020-06-24 2021-12-30 MOOG Gesellschaft mit beschränkter Haftung Axialkolbenmaschine mit einem abschnittsweise kugelförmigen Dichtring

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1511232A (en) * 1922-03-30 1924-10-14 Howard J Murray Clutch-ring synchronizing device
US1761259A (en) * 1928-09-27 1930-06-03 Carl Edward Pump or engine
FR1408719A (fr) * 1964-02-07 1965-08-20 Pompe ou moteur volumétrique à débit réglable
US3233555A (en) * 1962-08-16 1966-02-08 Gunnar A Wahlmark Variable displacement fluid device
US3331288A (en) * 1965-01-07 1967-07-18 Int Harvester Co Piston machine
US3333577A (en) * 1964-03-25 1967-08-01 Mongitore Pietro Rotary engine
US3648567A (en) * 1970-07-06 1972-03-14 Gen Motors Corp Variable displacement axial pump or motor
GB1309746A (en) * 1969-04-11 1973-03-14 Clerk R C Axial piston rotary barrel type hydraulic pumps or motors

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1511232A (en) * 1922-03-30 1924-10-14 Howard J Murray Clutch-ring synchronizing device
US1761259A (en) * 1928-09-27 1930-06-03 Carl Edward Pump or engine
US3233555A (en) * 1962-08-16 1966-02-08 Gunnar A Wahlmark Variable displacement fluid device
FR1408719A (fr) * 1964-02-07 1965-08-20 Pompe ou moteur volumétrique à débit réglable
US3333577A (en) * 1964-03-25 1967-08-01 Mongitore Pietro Rotary engine
US3331288A (en) * 1965-01-07 1967-07-18 Int Harvester Co Piston machine
GB1309746A (en) * 1969-04-11 1973-03-14 Clerk R C Axial piston rotary barrel type hydraulic pumps or motors
US3648567A (en) * 1970-07-06 1972-03-14 Gen Motors Corp Variable displacement axial pump or motor

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994010443A1 (fr) * 1992-10-30 1994-05-11 Felice Pecorari Machine volumetrique pour fluides equipee de pistons sans bielles
WO1994010442A1 (fr) * 1992-10-30 1994-05-11 Felice Pecorari Machine volumetrique pour fluides equipee de pistons sans bielles
US5636561A (en) * 1992-10-30 1997-06-10 Felice Pecorari Volumetric fluid machine equipped with pistons without connecting rods
GB2278649A (en) * 1993-05-20 1994-12-07 Wolfhart Willimczik Rotary piston machines
GB2278649B (en) * 1993-05-20 1997-12-17 Wolfhart Willimczik Rotary piston machines with a bearingless power train and stressless sliding parts
WO2007009811A2 (fr) * 2005-07-21 2007-01-25 Brueninghaus Hydromatik Gmbh Moteur a pistons hydrostatique fonctionnant selon le principe de la coupelle flottante presentant une surface d'appui contre une plaque support
WO2007009811A3 (fr) * 2005-07-21 2007-11-22 Brueninghaus Hydromatik Gmbh Moteur a pistons hydrostatique fonctionnant selon le principe de la coupelle flottante presentant une surface d'appui contre une plaque support
WO2007014709A1 (fr) * 2005-08-04 2007-02-08 Bosch Rexroth Ag Machine a pistons axiaux
US20100018495A1 (en) * 2006-12-29 2010-01-28 Yau Cheung Kwok Gyroscopic Rotary Engine
US8297239B2 (en) * 2006-12-29 2012-10-30 Yau Cheung Kwok Gyroscopic rotary engine
WO2014191654A1 (fr) * 2013-05-30 2014-12-04 Technoboost Procédé et dispositif de contrôle/commande d'un module hydraulique pour véhicule hybride
FR3006273A1 (fr) * 2013-05-30 2014-12-05 Technoboost Procede et dispositif de controle/commande d'un module hydraulique pour vehicule hybride
EP3150852A1 (fr) * 2015-10-01 2017-04-05 Volvo Car Corporation Bague d'étanchéité, un agencement de cylindre et ensemble de moteur/de pompage
EP3246565A1 (fr) * 2016-05-19 2017-11-22 Innas B.V. Dispositif hydraulique
WO2017198720A1 (fr) * 2016-05-19 2017-11-23 Innas Bv Dispositif hydraulique
CN109154284A (zh) * 2016-05-19 2019-01-04 伊纳斯有限公司 一种液压装置
US10830221B2 (en) 2016-05-19 2020-11-10 Innas Bv Hydraulic device, a method of manufacturing a hydraulic device and a group of hydraulic devices
US10914172B2 (en) 2016-05-19 2021-02-09 Innas Bv Hydraulic device
US11067067B2 (en) 2016-05-19 2021-07-20 Innas Bv Hydraulic device
DE102020116656A1 (de) 2020-06-24 2021-12-30 MOOG Gesellschaft mit beschränkter Haftung Axialkolbenmaschine mit einem abschnittsweise kugelförmigen Dichtring

Also Published As

Publication number Publication date
EP0189452A1 (fr) 1986-08-06
GB8417816D0 (en) 1984-08-15

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