EP1387957A1 - Machine a pistons elevateurs dotee d'une articulation - Google Patents

Machine a pistons elevateurs dotee d'une articulation

Info

Publication number
EP1387957A1
EP1387957A1 EP02742856A EP02742856A EP1387957A1 EP 1387957 A1 EP1387957 A1 EP 1387957A1 EP 02742856 A EP02742856 A EP 02742856A EP 02742856 A EP02742856 A EP 02742856A EP 1387957 A1 EP1387957 A1 EP 1387957A1
Authority
EP
European Patent Office
Prior art keywords
piston
center
swivel plate
geometric center
joint arrangement
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.)
Granted
Application number
EP02742856A
Other languages
German (de)
English (en)
Other versions
EP1387957B1 (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

Links

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 piston machine according to the preamble of claim 1.
  • a generic piston engine comprises a machine housing in which a plurality of pistons are arranged in a circular arrangement around a rotating drive shaft.
  • the drive force is transmitted from the drive shaft via a driver to an annular swivel disk and from this in turn via a joint arrangement to the pistons which are translationally displaceable parallel to the machine shaft.
  • the swivel plate is pivotally mounted on the one hand on a sliding sleeve fastened linearly to the machine shaft; on the other hand, it slides along the joint arrangement, which surrounds the swivel plate with two spherical cap-shaped sliding blocks.
  • a center of force transmission is provided in the joint arrangement, which is arranged in the extension of the associated piston axis and forms the geometric center of the spherical sliding surfaces of the sliding blocks.
  • Machine shaft, driver, swivel plate and the joint arrangements and are arranged in a so-called drive room, in which the working medium of the reciprocating piston machine is at a certain pressure.
  • the delivery volume and thus the stroke of the pistons and the inclination of the swivel plate with respect to the machine shaft depend on the pressure ratio between the suction side and the pressure side of the pistons or accordingly on the pressures in the cylinders on the one hand and in the drive chamber on the other.
  • the object of the invention is to provide a reciprocating piston machine with improved operating behavior and higher performance.
  • the reciprocating piston machine according to the invention is characterized by an articulated arrangement to which a force transmission center approximately on the cylinder jacket of the piston axes is assigned, which is positioned in front of the associated piston axis with respect to the direction of rotation of the swivel plate.
  • the center of power transmission is a geometric location where the power transmission between the swivel plate and the respective piston takes place in an idealized manner. Furthermore, the center of force transmission represents the pivot point of the joint arrangement and possibly the common center of several sliding or rolling elements. By shifting the center of force transmission on the cylinder jacket defined by the piston axes, the introduction of force into the corresponding piston can be influenced.
  • the position of the center of force transmission should be shifted against the direction of rotation of the swivel plate in front of the piston axis, so that the torque or tilting moment exerted on the piston because of the inclined arrangement of the swivel plate and corresponding support forces on a piston guide are reduced.
  • the joint arrangement has a first sliding element with a first spherical-segment-shaped sliding surface and a second sliding element with a second spherical-segment-shaped sliding surface, the sliding surfaces having a common geometric center, which is aligned with the center of force transmission Joint arrangement approximately coincides.
  • the center of force transmission can be located approximately on the center plane of the swivel plate or between the center plane of the swivel plate and the piston guide
  • the reciprocating piston machine according to the invention is alternatively characterized in that a first sliding element has a first spherical segment-shaped sliding surface with a first geometric center and a second sliding element has a second spherical segment-shaped sliding surface with a second geometric center, the first and second center points being arranged at a distance from one another.
  • This arrangement is preferably relaxed and, if necessary, implemented with play if the swivel disk forms a right angle with the machine shaft and is therefore in a “neutral position” in which no piston stroke is generated.
  • the radius of the receptacle is approximately that Radius of the sliding surfaces
  • the first geometric center is arranged on a side of the center plane of the swivel plate facing the piston guide and the second geometric center is arranged on a side of the center plane of the swivel plate facing away from the piston guide.
  • the arrangement is preferably designed symmetrically with respect to the center plane of the swivel plate in the neutral position. This results in a uniform reduction of an existing game and / or a uniform bracing of the Sliding elements in the event of any deviation of the swashplate from the neutral position.
  • the first geometric center is arranged on the side of the center plane of the swivel plate facing the piston guide and the second geometric center is arranged approximately on the center plane of the swivel plate or likewise on the side of the center plane of the swivel plate facing the piston guide.
  • the first geometric center is offset on the cylinder jacket in the direction of rotation relative to the second geometric center. This results in a reduction in a play present in the neutral position when the swivel plate is pivoted in a first direction and an increase in the play when the swivel plate is pivoted in the opposite direction.
  • FIG. 1 shows a longitudinal section through a reciprocating piston machine according to the invention
  • FIG. 2 is a schematic diagram of the function of the reciprocating piston machine according to FIG. 1, 3 and 4 schematic diagrams for the function of a first
  • Fig. 5 is a schematic diagram of the function of a second ⁇ embodiment of the joint arrangement
  • Fig. 6 is a schematic diagram of the function of a third embodiment of the joint arrangement.
  • the reciprocating piston machine 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.e. 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 liners 10 (piston guides) in which cylindrical compression spaces 13 are formed (cf. 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 pistons 4 by means of a power transmission arrangement which is explained in more detail below.
  • a sliding body in the form of a sliding sleeve 9 is guided on the machine shaft 2.
  • a preferably circular swivel disk 5 is in turn mounted on the sliding sleeve 9, the swivel disk 5 being displaceable together with the sliding sleeve 9 in the direction of the axis of rotation 11.
  • On the sliding sleeve 9 two short pins are attached on both sides, which define a hinge axis 8 oriented transversely to the axis of rotation 11 of the machine shaft, about which the swivel plate 5 can be pivoted.
  • a driver 7 is fixed in a recess 2a of the machine shaft 2.
  • the driver 7 protrudes approximately at a right angle from the machine shaft and engages with a spherical articulation section in a radially open receptacle 15 on the swivel plate side (see FIG. 2). Since the driver 7 is fixed on the machine shaft, pivoting of the swivel plate about the hinge axis 8 is coupled to displacement of the sliding sleeve 9. When the reciprocating piston machine is operating, the rotation of the machine shaft 2 is transmitted to the swivel plate via the driver 7 (rotary movement in the direction of the arrow w).
  • the main median plane rotates with the machine shaft.
  • the swivel plate 5 is encompassed on its periphery in the region of each piston 4 by a joint arrangement 6 which slides over the swivel plate when it executes its rotational movement w.
  • the swivel plate 5 When the swivel plate 5 is inclined relative to the machine shaft 2, the swivel plate causes the pistons on the pressure side to move in compression and the pistons on the suction side to move in the course of their rotation.
  • 2 shows a simplified schematic diagram for power transmission between the machine shaft 2 and the piston 4.
  • FIGS. 3 and 4 show a view in the radial direction from the machine shaft 2 to the outside, the swivel plate 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 arrangement 6 has a receptacle with two identical, approximately spherical guide and sliding surfaces ⁇ a, in which two spherical cap-shaped sliding elements 16, 17 are mounted.
  • the receptacle and the sliding elements 16, 17 are assigned a common geometric center point M, which at the same time forms a center of force transmission K of the joint arrangement 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 are seated on the swivel plate 5 with little play.
  • the center of force transmission K is positioned against the direction of rotation w in front of the piston axis 12 of the associated piston 4 on the cylinder jacket containing all the piston axes.
  • the distance between the center of force transmission M and the piston axis 12 is preferably 10% to 20% of the piston stroke.
  • the force introduction point K s for the suction stroke is therefore further away from the piston 4 and from the piston guide 10 than the force transmission center K of the joint arrangement, while the force introduction point K v for the compression stroke is closer to the piston 4 lies as the center of power transmission K of the joint arrangement.
  • the same applies to the support forces A s and A v which are approximately the same size in a preferred embodiment.
  • FIG. 5 A second exemplary embodiment of the joint arrangement 6 according to the invention is shown in FIG. 5.
  • the joint arrangement 6 has a receptacle with two spherical sliding / guiding 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 slide element 18 is arranged on the side facing the associated piston
  • the second slide element 19 is arranged on the side of the swivel plate 5 facing away from the piston, so that the swivel plate 5 is encompassed by the slide elements 18, 19.
  • the geometric center Mi of the first sliding element 18 is arranged between the central plane 5a of the swivel plate 5 and the piston (not shown), while the geometric center M 2 of the second sliding element 19 lies on the central plane 5a. This results in different radii of curvature for the same angular mobility Sliding surfaces 18a and 19a, the smaller radius being provided in the sliding element 18 arranged on the side of the piston guide.
  • the joint arrangement is braced in the no-load state
  • This preload is compensated for by the fact that the joint arrangement 6 is bent up by forces occurring during operation of the reciprocating piston engine, ideally the static preload and the dynamic operating forces on the joint arrangement neutralize in the load state.
  • the center of force of the joint arrangement 6 is in the state of the prestress between the two geometric centers M x , M 2 , so that the force introduction into the piston (compared to arrangements with a center of force transmission on the central plane 5a) is generally closer to the piston guide and a smaller tilting moment is exerted on the piston.
  • the geometric center M x , M 2 so that the force introduction into the piston (compared to arrangements with a center of force transmission on the central plane 5a) is generally closer to the piston guide and a smaller tilting moment is exerted on the piston.
  • reciprocating piston machines can be designed which, with essentially the same dimensions as reciprocating piston machines according to the prior art, can withstand higher dynamic loads in the area of power transmission between the swash plate and the piston. At the same time, there are reduced or more uniform force relationships in the area of the piston guides and on the joint arrangements. This results in higher performance with 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)

Abstract

Machine à pistons élévateurs, en particulier compresseur frigorifique (1) pour l'installation de conditionnement d'air d'une automobile, qui comporte un arbre (2), plusieurs pistons (4) dont les axes sont placés, avec le même écart par rapport à l'arbre, sur le corps du cylindre situé autour de l'arbre, et un anneau pivotant (5) entraîné par l'arbre (2) et fixé au piston par l'intermédiaire d'une articulation (6). Ladite articulation possède un évidement au moins partiellement sphérique dans lequel est placé mobile au moins un élément coulissant par rapport au piston associé et à l'anneau pivotant. Selon la présente invention, un point médian de transmission de force (K) se trouvant approximativement sur le corps de cylindre des axes de piston est associé à l'articulation (6), ledit point étant placé avant l'axe (12) de piston associé, par rapport au sens de rotation de l'anneau pivotant (5). La présente invention concerne également l'utilisation de ladite machine dans des compresseurs frigorifiques pour automobiles.
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 true EP1387957A1 (fr) 2004-02-11
EP1387957B1 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
See references of WO02093011A1 *

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
US7201566B2 (en) 2007-04-10
KR100871262B1 (ko) 2008-11-28
WO2002093011A1 (fr) 2002-11-21
US20040120831A1 (en) 2004-06-24
EP1387957B1 (fr) 2007-07-25
CN1298997C (zh) 2007-02-07
DE10124034A1 (de) 2002-11-21
DE50210554D1 (de) 2007-09-06
JP4137646B2 (ja) 2008-08-20

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