EP0270917B1 - Palier élastique pour excentrique de machine à déplacement positif - Google Patents

Palier élastique pour excentrique de machine à déplacement positif Download PDF

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Publication number
EP0270917B1
EP0270917B1 EP87117346A EP87117346A EP0270917B1 EP 0270917 B1 EP0270917 B1 EP 0270917B1 EP 87117346 A EP87117346 A EP 87117346A EP 87117346 A EP87117346 A EP 87117346A EP 0270917 B1 EP0270917 B1 EP 0270917B1
Authority
EP
European Patent Office
Prior art keywords
bearing
displacer
rubber
ring
eccentric
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
EP87117346A
Other languages
German (de)
English (en)
Other versions
EP0270917A2 (fr
EP0270917A3 (en
Inventor
Hans Paul Maier
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.)
Agintec AG
Original Assignee
Agintec 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 Agintec AG filed Critical Agintec AG
Publication of EP0270917A2 publication Critical patent/EP0270917A2/fr
Publication of EP0270917A3 publication Critical patent/EP0270917A3/de
Application granted granted Critical
Publication of EP0270917B1 publication Critical patent/EP0270917B1/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
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/008—Driving elements, brakes, couplings, transmissions specially adapted for rotary or oscillating-piston machines or engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C17/00—Arrangements for drive of co-operating members, e.g. for rotary piston and casing
    • F01C17/06—Arrangements for drive of co-operating members, e.g. for rotary piston and casing using cranks, universal joints or similar elements
    • F01C17/063—Arrangements for drive of co-operating members, e.g. for rotary piston and casing using cranks, universal joints or similar elements with only rolling movement

Definitions

  • the invention relates to an eccentrically and elastically designed mounting of a displacer executing a circular translational movement in an displacement machine around an eccentric.
  • the drive shaft of the displacer is designed as a crankshaft, on the crank pin of which a sleeve is pushed which carries an elastic ring made of rubber or an elastomer with a central bore. This elastic ring sits in an adapted front recess of the displacer.
  • Two anti-rotation devices are provided for the displacer, each having a crank mounted in a sleeve in the housing, the crank pin of which is connected to the displacer in the same way as the crank pin of the drive shaft.
  • a displacement machine designed as a rotary piston machine can e.g. see DE-OS 22 30 773.
  • the displacer (piston) executes a circular (translational) movement around an eccentric.
  • eccentric shafts in a machining or built version have to be produced in a costly manner.
  • Displacement machines designed as pumps repeatedly result in problems with the design and tolerance of the eccentric shafts of the displacement bearings.
  • Displacers for pumps can be formed axially on one side or double-sided in such machines, so that there is in itself the possibility of supporting the displacers in a resilient manner both radially and axially. In this way, depending on the choice of the spring characteristics, the pressure ranges for such pumps can be set.
  • Such pressure-limited positive displacement pumps partly have the characteristics of flow pumps without the disadvantages such as lack of self-priming ability, cavitation problems with throttled pipe cross sections and the like of turbomachines.
  • CH-PS 555 476 discloses a displacement machine with a curved displacer, which is rotatably mounted on an eccentric coupled to a rotatably mounted drive shaft and is guided through it to perform a circular movement in a correspondingly curved displacement chamber with an inlet and an outlet .
  • the displacer can be deflected against the action of an elastic force from the contact position with the wall of the displacement chamber along lines of contact parallel to the axes of curvature.
  • a metallic spring element which acts as an energy store, is provided to generate the elastic force.
  • the spring element can be formed by the displacer formed as a leaf spring bent about a bending axis parallel to the axis of the circular movement.
  • the spring element can also be formed by an elastically deflectable wobble rod which; is articulated at one end to the displacer and is mounted between its ends in a ball joint whose center lies on the axis of rotation of the drive shaft.
  • DE-OS 26 03 462 discloses a positive displacement machine for compressible media.
  • the displacer describes a circular translational movement around an eccentric track.
  • it is essential to provide an anti-rotation device for the displacer, since otherwise the displacer would immediately suffer mechanical damage if the rotation movement was slight even in addition to the circular movement.
  • Eccentric shafts of costly construction or machined production are also used for these displacement machines, the displacer also being able to be axially sprung and additionally supported with an integrated anti-rotation device.
  • a known anti-rotation lock comprises a plurality of balls, each loaded by compression springs, which execute a slight eccentric movement in correspondingly designed pans.
  • DE-OS 35 38 522 discloses an anti-rotation device with spring-elastic play compensation for the displacer of a displacement machine.
  • the training is comparable to that of DE-OS 28 31 179.
  • the invention has for its object to construct the above-described storage of a displacer so that it can be manufactured more cost-effectively.
  • the displacer has a rotatably mounted in it, the eccentric bearing disc in which an eccentric to an outer bearing surface forming the bearing surface is arranged a recess for the rotationally fixed reception of a shaft, the space between the bearing shell and Recess with a rubber-elastic material, such as. B. rubber, is filled to produce a radial elasticity.
  • a rubber-elastic material such as. B. rubber
  • DE-OS 22 25 327 it is in a displacement machine designed as a vacuum pump with a circular translational movement around an eccentric displacer known to drive the displacer via three eccentrics acting on its circumference, each rotating in a ball bearing and each formed by an eccentrically fixed socket on the drive shaft.
  • the eccentric bearings are not designed to be elastic, so that there is no generic embodiment in which the problems resulting from an elastic displacement bearing cannot arise.
  • GB-A-533 960 discloses, as a shock absorber for the suspension of vehicle parts, a disc which consists of an outer ring, an inner ring which is arranged eccentrically thereto and a rubber material which fills the space between the two rings.
  • This shock absorber disc should be mounted so that the inner ring rests on the largest rubber cross-section in the direction of the compressive force acting on it. With e.g. The disk should be mounted so that the inner ring is offset by the eccentricity.
  • DE-A-25 18 150 discloses an eccentric shaft, preferably intended for radial and rotary piston machines, consisting of an essentially cylindrical shaft with an eccentric cooperating with the piston.
  • the eccentric shaft consists of an outer ring body, a shaft penetrating the ring body and a connecting element connecting both parts.
  • the connecting element can be designed as an injection molded part, which is produced by injection between the ring body and the shaft and is made of plastic, as a result of which a certain elasticity is introduced into the transmission of the eccentric shaft.
  • the bearing disk according to the invention since it is already possible to impart different spring characteristics to a plastic by means of electron beam crosslinking, it would be possible to form the bearing disk according to the invention in one piece.
  • the outer bearing jacket is a bearing ring, into which a bush forming the aforementioned recess is vulcanized.
  • the bearing ring can preferably be the inner ring of a rolling bearing.
  • a specific spring characteristic can be achieved by specifically arranged and designed cross-sectional weakenings (notches, beads and / or channels or the like) in the elastic material.
  • the bearing disc according to the invention is simple to manufacture, quick and easy to assemble, reliable in operation but economical in maintenance. Tests have shown that the elastic bearings according to the invention not only achieve the specified operating pressures perfectly, but that, in particular in multi-shaft machines, the tolerances of the individual machine parts are compensated properly.
  • a bearing which is not only elastic in the radial direction but also in the axial direction is characterized in accordance with the invention in that the bearing ring and / or the bushing covers or covers a portion of the end faces of the elastic material with a collar.
  • the object on which the invention is based can also be achieved in accordance with an alternative solution in connection with the features mentioned at the outset in that the displacer has a bearing disc which is rotatably mounted in it and forms the eccentric and in which a recess is formed eccentrically to an outer bearing surface which forms the bearing surface the inclusion of a pin or the like. is arranged, wherein the bearing disk consists of two cover disks sandwiching between them a layer of elastic material.
  • the displacer is elastically supported in the axial direction.
  • This embodiment can be used in particular as a reliable anti-rotation device, which can also be produced particularly inexpensively.
  • FIG. 1 shows a bearing disc 3, in which a recess 5 for receiving a shaft, not shown, is arranged eccentrically to the outer bearing jacket 4.
  • the material 7 filling the space between the bearing jacket 4 and the recess 5 is designed to be rubber-elastic.
  • the outer bearing jacket 4 is formed by a bearing ring 8, into which a bush 9 forming the said recess 5 is vulcanized.
  • Figures 3 and 4 show that the bearing ring 8 also be the inner ring of a roller bearing 10.
  • the inner diameter of the bearing ring 4 is a multiple of that of the bushing 9.
  • the bearing disk 3 has spring-elastic properties exclusively in the radial direction.
  • both the bearing ring 8 and the bushing 9 can each have a portion of the end faces of the rubber-elastic material 7 with a collar 11 or 12 cover.
  • the spring-elastic path in the radial direction is determined by the radial distance 15 between the collar 11 and the bushing 9 or by the radial distance 16 between the collar 12 and the bearing ring 8. In the exemplary embodiment, this radial spring travel is relatively short; Figure 7 shows that the resilient design is greater in the axial direction. This results from the axial distance between the aforementioned collars 11 and 12 and from the elasticity of the rubber-elastic material 7.
  • the radial distances 15, 16 between the collar 11 and the bushing 9 or the collar 12 and the bearing ring 8 can be different from the rubber-elastic one Material 7 filled out or left out of this material.
  • the bearing disc 3 according to FIGS. 8 and 9 has spring-elastic properties only in the axial direction.
  • the bearing disk 3 consists of two cover disks 14, which sandwich a layer of rubber-elastic material 7 between them.
  • a recess 5 for receiving a pin or the like is arranged eccentrically to the outer bearing jacket 4.
  • FIG. 9 shows that the rubber-elastic material 7 is arched somewhat radially inwards between the two cover disks 14 both in the area of the bearing casing 4 and in the area of the recess 5.
  • FIG. 11 shows a cross section through a displacement machine and reveals a displacer 1 which carries out a translational movement about an eccentric a with respect to a displacement chamber or a displacement housing 2.
  • the displacer 1 is driven in a conventional manner via an eccentric shaft 6.
  • a bearing disk 3 according to FIGS. 1 to 6 can be used for the eccentric bearing of the displacer.
  • FIGS. 10 and 11 also show an anti-rotation device for the displacer 1.
  • This anti-rotation device is formed by a bearing disk 3 according to FIGS. 8 and 9, that is to say a bearing disk which is designed to be spring-elastic only in the axial direction.
  • a pin 13 engages in the recess 5 arranged eccentrically to the outer bearing jacket 4 by the dimension a.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Support Of The Bearing (AREA)
  • Soil Working Implements (AREA)

Claims (7)

1. Montage excentrique et élastique d'un actionneur (1) produisant dans une machine d'actionnement un mouvement de translation giratoire autour d'un excentrique, caractérisé en ce que l'actionneur (1) comporte un disque d'appui (3) qui constitue l'excentrique, qui est monté de manière rotative dans ledit actionneur, et dans lequel est ménagé, excentriquement par rapport à une enveloppe extérieure d'appui (4) constituant la surface de portée, un évidement (5) destiné à recevoir sans possibilité de rotation relative un arbre (6), l'espace intermédiaire compris entre l'enveloppe d'appui (4) et l'évidement (5) étant rempli d'un matériau élastique (7), tel que par exemple du caoutchouc, pour produire une élasticité radiale.
2. Montage conforme à la revendication 1, caractérisé en ce que l'enveloppe extérieure d'appui (4) est une bague d'appui (8) dans laquelle est vulcanisé un manchon (9) constituant ledit évidement (5).
3. Montage conforme à la revendication 2, caractérisé en ce que la bague d'appui (8) est la bague intérieure d'un roulement (10).
4. Montage conforme à l'une des revendications 2 ou 3, caractérisé en ce que le diamètre intérieur de la bague d'appui (8) est un multiple de celui du manchon (9).
5. Montage conforme à l'une des revendications précédentes, caractérisé en ce que, pour obtenir une caractéristique d'élasticité déterminée, il est prévu dans le matériau élastique (7), comme éléments transversaux d'affaiblissement, des rainures, des moulures et/ou des canaux ou analogue.
6. Montage conforme à l'une des revendications 2 à 5, caractérisé en ce que la bague d'appui (8) et/ou le manchon (9) recouvre ou recouvrent au moyen d'une collerette (11, 12) une région partielle des faces frontales du matériau élastique (7).
7. Montage conforme à la revendication 1, caractérisé par un dispositif anti-rotation pour l'actionneur (1), ce dispositif étant constitué par un disque d'appui (3) dans lequel est ménagé, excentriquement par rapport à l'enveloppe extérieure d'appui (4), un évidement destiné à recevoir une broche (13) ou analogue, le disque d'appui (3) étant constitué par deux disques de recouvrement (14) qui entourent entre eux en sandwich une couche de matériau élastique (7).
EP87117346A 1986-12-10 1987-11-25 Palier élastique pour excentrique de machine à déplacement positif Expired - Lifetime EP0270917B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3642116 1986-12-10
DE19863642116 DE3642116A1 (de) 1986-12-10 1986-12-10 Federelastische exzenterlagerung fuer verdraengermaschinen

Publications (3)

Publication Number Publication Date
EP0270917A2 EP0270917A2 (fr) 1988-06-15
EP0270917A3 EP0270917A3 (en) 1988-09-14
EP0270917B1 true EP0270917B1 (fr) 1991-12-11

Family

ID=6315843

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87117346A Expired - Lifetime EP0270917B1 (fr) 1986-12-10 1987-11-25 Palier élastique pour excentrique de machine à déplacement positif

Country Status (3)

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EP (1) EP0270917B1 (fr)
DE (2) DE3642116A1 (fr)
ES (1) ES2026887T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3729319C2 (de) * 1987-09-02 1995-11-16 Bock Gmbh & Co Kaeltemaschinen Spiralverdichter
JPH03138472A (ja) * 1989-10-20 1991-06-12 Tokico Ltd スクロール式流体機械
DE4116827C2 (de) * 1990-05-30 2002-10-17 Volkswagen Ag Exzenterantrieb mit einer eine elastische Bettung aufweisenden Lageranordnung
US5201645A (en) * 1992-07-20 1993-04-13 Ford Motor Company Compliant device for a scroll-type compressor
FR3027972B1 (fr) * 2014-10-30 2019-09-20 Valeo Japan Co., Ltd. Compresseur, notamment pour vehicule automobile

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH453005A (fr) * 1967-03-03 1968-05-31 Mefina Sa Manivelle, notamment pour machine à coudre

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB533960A (en) * 1938-09-01 1941-02-25 Zd Y Ringhoffer Tatra As Improvements in resilient members for the attachment of various components of motor vehicles
US2475247A (en) * 1944-05-22 1949-07-05 Mikulasek John Planetary piston fluid displacement mechanism
CH253005A (de) * 1945-11-29 1948-02-15 Otto Herfeld & Co Lauffleck für Schuhe.
NL7111824A (fr) * 1970-09-18 1973-03-01
FR2153129B2 (fr) * 1971-06-01 1974-01-04 Vulliez Paul
DE2518150A1 (de) * 1975-04-24 1976-11-04 Fichtel & Sachs Ag Exzenterwelle
DE2831179A1 (de) * 1978-07-15 1980-01-24 Leybold Heraeus Gmbh & Co Kg Verdraengermaschine nach dem spiralprinzip
DE3538522C2 (de) * 1985-06-04 1994-05-19 Volkswagen Ag Exzenterantrieb für eine Drehmasse

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH453005A (fr) * 1967-03-03 1968-05-31 Mefina Sa Manivelle, notamment pour machine à coudre

Also Published As

Publication number Publication date
EP0270917A2 (fr) 1988-06-15
DE3642116C2 (fr) 1989-12-21
DE3642116A1 (de) 1988-06-23
ES2026887T3 (es) 1992-05-16
DE3775187D1 (de) 1992-01-23
EP0270917A3 (en) 1988-09-14

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