EP1387957B1 - Machine a pistons elevateurs dotee d'une articulation - Google Patents

Machine a pistons elevateurs dotee d'une articulation Download PDF

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Publication number
EP1387957B1
EP1387957B1 EP02742856A EP02742856A EP1387957B1 EP 1387957 B1 EP1387957 B1 EP 1387957B1 EP 02742856 A EP02742856 A EP 02742856A EP 02742856 A EP02742856 A EP 02742856A EP 1387957 B1 EP1387957 B1 EP 1387957B1
Authority
EP
European Patent Office
Prior art keywords
piston
machine shaft
sliding
swash plate
sub
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
EP02742856A
Other languages
German (de)
English (en)
Other versions
EP1387957A1 (fr
Inventor
Roland Cäsar
Peter Kuhn
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.)
Obrist Engineering GmbH
Mercedes Benz Group AG
Original Assignee
Obrist Engineering GmbH
DaimlerChrysler 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
Application filed by Obrist Engineering GmbH, DaimlerChrysler AG filed Critical Obrist Engineering GmbH
Publication of EP1387957A1 publication Critical patent/EP1387957A1/fr
Application granted granted Critical
Publication of EP1387957B1 publication Critical patent/EP1387957B1/fr
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
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • 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
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
    • F04B27/0878—Pistons
    • 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
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
    • F04B27/0878—Pistons
    • F04B27/0886—Piston shoes

Definitions

  • the invention relates to a reciprocating engine according to the preamble of claim 1.
  • a power transmission center is provided, which is arranged in extension of the respectively associated piston axis and forms the geometric center of the spherical sliding surfaces of the sliding blocks.
  • Machine shaft, driver, swivel disk and the joint assemblies and are arranged in a so-called drive chamber, in the gaseous working fluid of the reciprocating engine is present at a certain pressure.
  • the delivery volume and thus the stroke of the piston and the inclination of the swash plate relative to the machine shaft are dependent on the pressure ratio between the suction side and pressure side of the piston or depending on the pressures in the cylinders on the one hand and in the drive chamber on the other.
  • JP 05-306678 A is a reciprocating engine with a machine shaft which has a plurality of equally spaced around the machine shaft around the piston, wherein the pistons are articulated via a respective hinge assembly of a swash plate.
  • the joint arrangements each have sections of spherical receptacles in which spaced-apart sliding elements are provided with ball-shaped sliding surfaces.
  • the object of the invention is in contrast to provide a reciprocating engine with improved performance and higher performance.
  • a reciprocating piston engine is characterized in that a first sliding element has a first spherical section-shaped sliding surface with a first geometric center and a second sliding member having a second spherical portion sliding surface with a second geometric center, wherein first and second center are spaced from each other.
  • This arrangement is preferably just relaxed and possibly executed with play when the swash plate with the machine shaft includes a right angle and thus is in a "neutral position" in which no piston stroke is generated.
  • the radius of the recording is approximately the radius of the sliding surfaces.
  • the reciprocating engine according to the invention is characterized in that the first geometric center is arranged offset from the second geometric center in the direction of rotation on the cylinder jacket. This results in a reduction of a present in the neutral position game at a pivoting of the swash plate in a first direction and an increase of the game at a pivoting of the swash plate in the opposite direction.
  • the joint arrangement is associated with an approximately lying on the cylinder jacket of the piston axes power transmission center, which is positioned with respect to the direction of rotation of the swash plate in front of the associated piston axis.
  • the power transmission center is a geometric location at which the power transmission between the swash plate and the respective piston takes place in an idealized manner.
  • the force transmission center is the pivot point of the joint assembly and possibly the common center of several sliding or rolling elements.
  • the position of the power transmission center should be moved against the direction of rotation of the swash plate in front of the piston axis, so that the force exerted on the piston due to the inclined arrangement of the swash plate rotation or tilting moment and corresponding support forces are reduced to a piston guide.
  • Fig. 1 is a longitudinal section through a reciprocating engine 1 is shown in the form of a refrigerant compressor for a motor vehicle air conditioning.
  • the reciprocating piston engine 1 has a plurality of pistons 4 arranged in a machine housing 3. All piston axes 12 are at a fixed distance from the axis of rotation 11, i. geometrically arranged on a cylinder jacket (not shown) around the machine shaft 2 and aligned parallel to the axis of rotation 11 of the machine shaft.
  • the pistons 4 are guided in cylindrical bushings 10 (piston guides) in which cylindrical compression chambers 13 are formed (compare FIGS. 2 to 4).
  • the pistons 4 separate the compression chambers 13 from a so-called drive chamber 14 ("crankcase").
  • the rotational movement of the machine shaft is converted into a translational movement of the piston 4.
  • a sliding body is guided in the form of a sliding sleeve 9.
  • a sliding sleeve 9 On the sliding sleeve 9, in turn, a preferably annular swash plate 5 is mounted, wherein the swash plate 5 together with the sliding sleeve 9 in the direction of the axis of rotation 11 is displaceable.
  • two short pins are mounted on both sides, which define a transverse to the axis of rotation 11 of the machine shaft aligned hinge axis 8, about which the swash plate 5 is pivotable.
  • a driver 7 is fixed in a recess 2a of the machine shaft 2, a driver 7 is fixed.
  • the driver 7 protrudes approximately at right angles from the machine shaft and engages with a spherical articulation section in a radially open receptacle 15 on the part of the swash plate (see Fig. 2). Since the driver 7 is fixed to the machine shaft, a pivoting of the swash plate about the hinge axis 8 is coupled to the displacement of the sliding sleeve 9. About the driver 7, the rotation of the machine shaft 2 is transmitted to the swash plate during operation of the reciprocating piston (rotational movement in the direction of the arrow w).
  • Perpendicular to the hinge axis 8 is defined by the axis of rotation 11 main center plane which separates a suction side of a pressure side of the reciprocating engine.
  • the main center plane rotates with the machine shaft.
  • the swash plate 5 is encompassed at its periphery in the region of each piston 4 by a hinge assembly 6 which slides over the swash plate when it carries out its rotational movement w. With an inclination of the swash plate 5 relative to the machine shaft 2, causes the swash plate in the course of its rotation, the piston located on the pressure side to a compression movement and lying on the suction side of the piston to a suction movement.
  • Fig. 2 is a simplified schematic diagram for power transmission between the machine shaft 2 and piston 4 is shown.
  • FIGS. 3 and 4 show a view in the radial direction from the machine shaft 2 to the outside again, the swivel disk 5 moving in the direction of the arrow w in FIG. 3 showing a suction stroke of the piston 4 (arrow s) and in Fig. 4 causes a compression stroke of the piston 4 (arrow v).
  • the joint assembly 6 has a receptacle with two identical, approximately spherical guide and sliding surfaces 6a, in which two spherical cap-shaped sliding elements 16, 17 are mounted.
  • the recording and the sliding elements 16, 17 is associated with a common geometric center M, which also forms a power transmission center K of the joint assembly 6.
  • the sliding surfaces 6a of the receptacle and the spherical surfaces of the sliding elements 16, 17 have the same radius and the same curvature.
  • the sliding elements 16, 17 sit with a small clearance on the swash plate 5.
  • the power transmission center K is positioned counter to the direction of rotation w in front of the piston axis 12 of the associated piston 4 on the cylinder jacket containing all piston axes.
  • the distance of the power transmission center M to the piston axis 12 is preferably 10% to 20% of the piston stroke.
  • the force application point K s for the suction stroke is thus further away from the piston 4 and the piston guide 10 than the power transmission center K of the joint assembly, while the force application point K v for the compression stroke closer to the piston 4th is located as the power transmission center K of the joint assembly.
  • the same applies to the supporting forces A s and A v which are approximately equal in a preferred embodiment.
  • FIG. 6 A second embodiment of the hinge arrangement 6 according to the invention is shown in FIG.
  • the joint arrangement 6 has a receptacle with two spherical sliding / guide surfaces 6a, 6b, in which a first sliding element 18 with a spherical segment-shaped sliding surface 18a and a second sliding element 19 with a spherical segment-shaped sliding surface 19a are mounted.
  • the first sliding element 18 is arranged on the side facing the associated piston, the second sliding element 19 on the side facing away from the piston side of the swash plate 5, so that the swash plate 5 is encompassed by the sliding elements 18, 19.
  • the geometric center M 1 of the first sliding element 18 is arranged between the median plane 5 a of the swash plate 5 and the piston (not shown), while the geometric center M 2 of the second sliding element 19 lies on the median plane 5 a.
  • the power transmission center of the joint assembly 6 is in the state of bias between the two geometric centers M 1 , M 2 , so that the force is introduced into the piston (relative to arrangements with a power transmission center on the center plane 5 a) generally closer to the piston guide and a smaller overturning moment is exerted on the piston.
  • the geometric Midpoints M 1 , M 2 are arranged approximately mirror-symmetrically with respect to the center plane 5a and the power transmission center on the center plane 5a.
  • FIG. 6 A third embodiment of the joint arrangement 6 according to the invention is shown in FIG.
  • the hinge assembly 6 comprises two sliding members 20, 21 corresponding to those in the previously described embodiments.
  • the sliding elements 20, 21 each have ball-section-shaped sliding surfaces 20a, 21a, which slide in a receptacle 6c, 6d.
  • the sliding surfaces 20a, 21a have geometric centers M 3 , M 4 , which lie approximately on the center plane 5a of the swash plate 5 and the other on the cylinder jacket, on which all piston axes 12 (see Fig. 1 to 3) of the reciprocating engine are positioned.
  • the geometric center M 3 of the closer lying on the piston guide slide 20 is seen in the direction of rotation of the swash plate (arrow w) behind the center M 4 of the opposite sliding element 21.
  • a joint arrangement of a piston is provided, the sliding blocks having spherical portion sliding surfaces positioned their centers according to a combination of the present in the aforementioned embodiments features in front of the associated piston axis, spaced apart in a direction parallel to the piston axis and / or in the rotational direction the swash plate are offset from each other.
  • reciprocating engines can be designed which can withstand substantially greater dynamic loads in the region of the power transmission between the swivel disk and the piston with essentially the same dimensions as compared with reciprocating engines of the prior art. At the same time there are reduced or evened balance of power in the area of the piston guides and on the joint arrangements. This results in higher performance with a smoother running and lower operating noise.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Confectionery (AREA)
  • Compressor (AREA)

Claims (3)

  1. Machine à pistons élévateurs, notamment un compresseur de liquide frigorifique (1) destiné à une climatisation de véhicule automobile, comprenant
    - un arbre de machine (2),
    - plusieurs pistons (4) dont les axes sont disposés sur un corps de cylindre autour de l'arbre de machine et à même distance dudit arbre,
    - un disque pivotant (5), notamment en forme de couronne, entraîné par l'arbre de machine (2), ledit disque venant en prise sur le piston par l'intermédiaire d'une articulation (6),
    - l'articulation comportant un logement qui est au moins partiellement de forme sphérique, logement dans lequel
    - est disposé de manière mobile un élément coulissant ou roulant au moins, agencé en face du piston affecté et en face du disque pivotant,
    - un premier élément coulissant (18, 20) comportant une première surface de glissement (18a, 20a) en forme de segment sphérique avec un premier centre géométrique (M1, M3) et
    - un deuxième élément coulissant (19, 21) comportant une deuxième surface de glissement (19a, 21a) en forme de segment sphérique avec un deuxième centre géométrique (M2, M4), le premier centre et le deuxième centre étant disposés à distance l'un par rapport à l'autre,
    caractérisée en ce que
    - le premier centre géométrique (M1) étant disposé sur le côté du plan médian (5a) du disque pivotant se trouvant en face du guidage du piston et le deuxième centre géométrique (M2) se trouvant approximativement sur le plan médian (5a) du disque pivotant ou également sur le côté du plan médian (5a) du disque pivotant se trouvant en face du guidage du piston.
  2. Machine à pistons élévateurs selon la revendication 1, caractérisée en ce que
    - le premier centre géométrique (M3) est disposé de manière décalée par rapport au deuxième centre géométrique (M4) sur le corps de cylindre, vu dans le sens de rotation (w).
  3. Machine à pistons élévateurs selon la revendication 1 ou 2, caractérisée en ce que
    - un centre de transfert des forces (K) est affecté à l'articulation (6), ledit centre se trouvant approximativement sur le corps de cylindre des axes de piston et
    - étant positionné devant l'axe de piston (12) associé, vu dans le sens de rotation du disque pivotant (5).
EP02742856A 2001-05-16 2002-03-14 Machine a pistons elevateurs dotee d'une articulation Expired - Lifetime EP1387957B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10124034 2001-05-16
DE10124034A DE10124034A1 (de) 2001-05-16 2001-05-16 Hubkolbenmaschine mit einer Gelenkanordnung
PCT/EP2002/002828 WO2002093011A1 (fr) 2001-05-16 2002-03-14 Machine a pistons elevateurs dotee d'une articulation

Publications (2)

Publication Number Publication Date
EP1387957A1 EP1387957A1 (fr) 2004-02-11
EP1387957B1 true EP1387957B1 (fr) 2007-07-25

Family

ID=7685136

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02742856A Expired - Lifetime EP1387957B1 (fr) 2001-05-16 2002-03-14 Machine a pistons elevateurs dotee d'une articulation

Country Status (8)

Country Link
US (1) US7201566B2 (fr)
EP (1) EP1387957B1 (fr)
JP (1) JP4137646B2 (fr)
KR (1) KR100871262B1 (fr)
CN (1) CN1298997C (fr)
AT (1) ATE368180T1 (fr)
DE (2) DE10124034A1 (fr)
WO (1) WO2002093011A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7874914B2 (en) * 1996-12-30 2011-01-25 Igt System and method for communicating game session information
DE102005018102A1 (de) 2005-04-19 2005-11-03 Zexel Valeo Compressor Europe Gmbh Axialkolbenverdichter
DE102005021029A1 (de) * 2005-05-06 2006-11-09 Linde Ag Axialkolbenmaschine in Schrägscheibenbauweise mit Lagerung des Zylinderblocks auf einem Tragzapfen
US7802512B2 (en) * 2007-02-07 2010-09-28 Doowon Technical College Assembly structure of drive shaft and swash plate in swash plate type compressor
DE102010052508A1 (de) * 2010-11-26 2012-05-31 Daimler Ag Abwärmenutzungsvorrichtung

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4512175A (en) * 1980-03-28 1985-04-23 Taiho Kogyo Co., Ltd. Swash plate type compressor shoe and manufacturing method therefor
JPS60175783A (ja) * 1984-02-21 1985-09-09 Sanden Corp 容量可変型斜板式圧縮機
US4683803A (en) * 1986-01-13 1987-08-04 General Motors Corporation Swash plate compressor having integral shoe and ball
JPS6334372U (fr) * 1986-08-25 1988-03-05
US5228841A (en) * 1991-03-28 1993-07-20 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Variable capacity single headed piston swash plate type compressor having piston abrasion preventing means
JP3033341B2 (ja) * 1992-04-30 2000-04-17 株式会社豊田自動織機製作所 斜板式圧縮機
JPH06346840A (ja) * 1993-06-08 1994-12-20 Toyota Autom Loom Works Ltd ウェーブカム式圧縮機
TW353705B (en) * 1995-06-05 1999-03-01 Toyoda Automatic Loom Works Reciprocating piston compressor
JPH09105379A (ja) * 1995-10-11 1997-04-22 Zexel Corp 可変容量型斜板式圧縮機
DE19749727C2 (de) * 1997-11-11 2001-03-08 Obrist Engineering Gmbh Lusten Hubkolbenmaschine mit Schwenkscheibengetriebe
JP4149056B2 (ja) * 1998-12-10 2008-09-10 Ｎｔｎ株式会社 斜板式コンプレッサの軸受装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN1509375A (zh) 2004-06-30
KR20040012840A (ko) 2004-02-11
ATE368180T1 (de) 2007-08-15
JP2005509102A (ja) 2005-04-07
EP1387957A1 (fr) 2004-02-11
US7201566B2 (en) 2007-04-10
KR100871262B1 (ko) 2008-11-28
WO2002093011A1 (fr) 2002-11-21
US20040120831A1 (en) 2004-06-24
CN1298997C (zh) 2007-02-07
DE10124034A1 (de) 2002-11-21
DE50210554D1 (de) 2007-09-06
JP4137646B2 (ja) 2008-08-20

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