EP0218016B1 - Machine à piston rotatif à axe interne - Google Patents

Machine à piston rotatif à axe interne Download PDF

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Publication number
EP0218016B1
EP0218016B1 EP86109611A EP86109611A EP0218016B1 EP 0218016 B1 EP0218016 B1 EP 0218016B1 EP 86109611 A EP86109611 A EP 86109611A EP 86109611 A EP86109611 A EP 86109611A EP 0218016 B1 EP0218016 B1 EP 0218016B1
Authority
EP
European Patent Office
Prior art keywords
parts
engagement
reinforcing
external rotor
machine according
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
EP86109611A
Other languages
German (de)
English (en)
Other versions
EP0218016A1 (fr
Inventor
Felix Dr. H.C. Wankel
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT86109611T priority Critical patent/ATE49625T1/de
Publication of EP0218016A1 publication Critical patent/EP0218016A1/fr
Application granted granted Critical
Publication of EP0218016B1 publication Critical patent/EP0218016B1/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
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • 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
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/08—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
    • F01C1/10—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F01C1/103—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • 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
    • F01C21/08—Rotary pistons
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/21—Utilizing thermal characteristic, e.g., expansion or contraction, etc.
    • Y10T403/217—Members having different coefficients of expansion

Definitions

  • the invention relates to an internal-axis rotary lobe machine according to the preamble of patent claim 1.
  • internal-axis rotary lobe machines have the further advantage that the external rotor can valve-control the inlet and outlet channels of the machine by moving its circumferential surfaces along the inner surface of the housing at a slight gap-forming distance.
  • Relatively large flow cross sections are possible. Accordingly, such machines are per se for very high rotational speeds of e.g. Suitable for 40,000 to 50,000 rpm, but due to the resulting deflection of the engaging parts of the outer rotor, known constructions only allow an axially short construction of the machine and large sealing gaps taking into account changes in shape in order to prevent the outer rotor from tarnishing on the inside surface of the housing.
  • the throughput of the known machines is correspondingly low, and large or wide sealing gaps lead to poor efficiency.
  • changes in shape due to thermal expansion also have a disadvantageous effect, since these too must be taken into account by means of sufficiently wide sealing gaps.
  • the invention has for its object to avoid the above-mentioned disadvantages and to find a rotary piston machine which, with a high throughput volume and compact design, enables high rotational speeds with narrow sealing gaps and thus an improved efficiency.
  • This object is achieved on the basis of the features of the characterizing part of patent claim 1.
  • the machine shown has a speed ratio between the outer rotor 2 and the inside. inner rotor 3 of 2: 3, so that three engagement parts 2a, 2b, 2c are provided on the outer rotor and two engagement parts 3a, 3b on the inner rotor.
  • the machine housing 1 has on its periphery an inlet duct 4 and an outlet duct 5, which are sealed off from one another by the passage near the sealing gap on the outer peripheral surface 7 of the engagement parts 2a, 2b, 2c along part 8 of the inner surface of the housing. It is necessary that the sealing gap extending along this surface part 8 of the housing 1 is longer in the circumferential direction than an engagement space or working space 9 between the engagement parts 2a, 2b, 2c.
  • this sealing gap can be made much narrower without increasing the frictional losses on this surface part 8 and between the rotors 2, 3.
  • the runners 2, 3 are supported by roller bearings 10, 11 which are supported on side plates 12, 13 of the housing 1. Because of the distance a between the geometrical axes 14, 15, the inner roller bearing 11 of the inner rotor 3 has a radially offset position within the surrounding outer roller bearing 10 of the outer rotor 2.
  • hubs 19, 18 are provided on its side parts integrally formed, which include the roller bearings 10.
  • part of one of these hubs 20 forms a hollow gear 21, with which a spur gear 22 meshes, which is placed on the shaft 23 of the inner rotor 3.
  • the side parts 17, 18 of the outer rotor 2 connect its three engagement parts 2a, 2b, 2c to one another and thereby seal the working spaces 9 of the machine in the axial direction together with a sealing body 25, 26, which is firmly connected to the housing side plates 12, 13.
  • these side parts 17, 18 of the outer rotor 2 have the form of circular rings, each of which has a radial seal 27, 28 radially on the outside and radially on the inside.
  • the side parts 17, 18 of the outer rotor can be cast in one piece with the engagement parts 2a, 2b, 2c or can also be cast subsequently with them, e.g. be connected by screws or other connecting means.
  • the reinforcing parts 31, 32 and 33 to 36 consist of tension screws which extend through obliquely directed bores 37, 38 which extend into the side parts 17, 18.
  • the screw head 39 is anchored on the engagement part 2a, 2b, 2c and the nut 41 belonging to the screw on the side part 17, 18 or vice versa.
  • the clamping screws 31, 32 and 33 to 36 are made of high-strength steel and are under substantial prestress by tightening the screw nuts 40 with the appropriate torque.
  • the modulus of elasticity of the tensioning screws is considerably higher than that of the material of the engagement parts 2a, 2b, 2c.
  • FIG. 3 shows the arrangement of weights 44 which are screwed onto the central region of the tensioning screws 33, 34, 35, 36 or otherwise fastened there and which, under the influence of the centrifugal force, deflect the tensioning screws and thus increase their tensile stress as a function of the rotational speed .
  • the clamping screws 31, 32; 33 to 36 can furthermore consist of a material with a lower thermal expansion than the surrounding material of the engagement parts 2a, 2b, 2c, so that they also counteract thermal expansion of the engagement parts in an improved manner.
  • pressure rods 37, 38 are provided as reinforcing parts, which are enclosed in the material of the engagement parts 2a, 2b, 2c in the casting process. They also have a much higher modulus of elasticity, but due to their arrangement directed obliquely from radially inwards to the central region 40, they are subjected to pressure and bending by reinforcing the engaging parts in a vault-like manner. In order to counteract a greater deflection of the engagement parts 2a, 2b, 2c under the influence of the centrifugal force when heated, these pressure rods 37, 38 have a higher thermal expansion than the surrounding material of the engagement parts 2a, 2b, 2c.
  • the reinforcing part 39 is completely enclosed in the material of the respective engagement part 2a, 2b, 2c. It consists of an arc radially extending over the central region 40 of the engagement part 2a, 2b, 2c, e.g. made of multi-fiber steel wire or other multi-fiber strand material with a much higher modulus of elasticity than that of the surrounding material. Due to the outward arc shape, the reinforcement member 39 is on train. claimed. The tensile forces are transmitted to rings 46, 47 which are laterally enclosed in the engagement part 2a, 2b, 2c and with which the ends 48, 49 of the arcuate reinforcing part 39 are welded.
  • the engagement parts 2a, 2b, 2c are connected in one piece to the side parts 17, 18 of the outer rotor 2 and include the rings 46, 47, to which the reinforcement parts 39 are each fastened.
  • Annular hub parts, which also engage in the cutouts 50, 51, are subsequently attached to these side parts.
  • This external rotor can for example be made of plastic or a plastic molding compound instead of metal. Different materials can also be selected for the reinforcement parts in accordance with the strength requirements or for manufacturing reasons.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Centrifugal Separators (AREA)
  • Steroid Compounds (AREA)
  • Toys (AREA)
  • X-Ray Techniques (AREA)
  • Soil Working Implements (AREA)
  • Vehicle Body Suspensions (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Rotary Pumps (AREA)

Claims (14)

1. Machine à piston rotatif à axe interne comportant un rotor externe (2) et un rotor interne (3), entourés d'un carter (1) commun, présentant à sa périphérie un canal d'admission (4) et un canal d'échappement (5), tandis que les rotors (2, 3) forment, par leur contact d'engrènement réciproque, des enceintes de travail (9) de volume variable qui sont rendus étanches, par le roulement et le glissement, constituant l'interstice d'étanchéité, des surfaces des rotors (2, 3) l'une sur l'autre et sur la surface interne (a) du carter, et tandis que les pièces d'engrènement (2a, 2b, 2c) du rotor externe 2 sont disposés à axes parallèles entre leurs pièces latérales (17, 18), sur lesquelles est monté le rotor externe (2) au moyen de paliers (10) entourant l'arbre (23) du rotor interne (3), caractérisée en ce que, dans chacune des pièces d'engrènement (2a, 2b, 2c) du rotor externe (2) est insérée au moins une pièces de renfort (31, 32; 33 à 36; 37, 38; 39) de forme allongée, qui s'étend de la zone médiane axialement (40) de la pièces d'engrènement (2a, 2b, 2c) dans la direction des pièces latérales (17, 18) et réalise un angle aigu avec l'axe longitudinal de la pièce d'engrènement (2a, 2b, 2c).
2. Machine suivant la revendication 1, caractérisée en ce qu'au moins deux pièces de renfort (31, 32; 33, 34; 35, 36; 37, 38) disposées symétriquement par paire, en s'écartant l'une de l'autre, en formant un angle obtus, s'étendent de la zone médiane (40) des pièces d'engrènement (2a, 2b, 2c) jusqu'aux pièces latérales (17, 18) du rotor externe (2).
3. Machine suivant la revendication 2, caractérisée en ce que les pièces de renfort (31, 32; 33-36) sont mises en pré-tension et sont ancrées à une extrémité (39) dans la zone médiane d'une pièce d'engrènement (2a, 2b, 2c) et à l'autre extrémité (41) à une pièce latérale (17, 18) du rotor externe (2), tandis que l'ancrage sur la pièce latérale (17, 18) est disposée plus près de l'axe (14) du rotor externe (2) que l'ancrage dans la zone médiane (40).
4. Machine suivant la revendication 3, caractérisée en ce que les pièces de renfort (31, 32; 33-36) sont des vis de traction qui sont placées dans des forations (37, 38) des pièces d'engrènement (2a, 2b, 2c).
5. Machine suivant la revendication 3 ou 4, caractérisée en ce que, sur les pièces de renfort (33-36), en leur zone médiane, est fixé un poids (44), tandis qu'une foration pour les recevoir, enfermant la pièce de renfort et le poids, a un diamètre plus grand que celui du poids (44), de telle façon que la pièce de renfort peut fléchir sous l'effet de la force centrifuge.
6. Machine suivant la revendication 1 ou 2, caractérisée en ce que les pièces de renfort (39) ou les pièces de renfort (37, 38) sont coulées dans chacune des pièces d'engrènement (2a, 2b, 2c), de telle façon qu'elles forment un composite avec le matériau de la pièce de renfort.
7. Machine suivant la revendication 6, caractérisée en ce que les pièces de renfort (37, 38) sont des barres travaillant à la compression, dont l'extrémité intérieure dans la direction radiale est disposée dans la zone médiane axialement (40) de la pièce d'engrènement (2a, 2b, 2c) et qui s'étendent obliquement radialement vers l'extérieur, en direction des pièces latérales (17, 18) du rotor externe (2).
8. Machine suivant la revendication 6, caractérisée en ce que la pièce de renfort (39) est courbée radialement vers l'extérieur en formant un arc et s'étend à travers la pièce d'engrènement (2a, 2b, 2c) de l'une des pièces latérale (17) à l'autre pièce latérale (18) du rotor externe (2).
9. Machine suivant la revendication 8, caractérisée en ce que, dans chacune des pièces latérales (17, 18) du rotor externe (2), est incluse une bague (46, 47), sur laquelle est chaque fois fixée une des extrémités de la pièce de renfort (39) en forme d'arc.
10. Machine suivant l'une quelconque des revendications 1 à 9, caractérisée en ce que plusieurs pièces de renfort (31, 32; 33-36, 37, 38; 39) sont prévues l'une contre l'autre suivant la direction radiale, dans les pièces d'engrènement (2a, 2b, 2c) du rotor externe (2).
11. Machine suivant l'une quelconque des revendications 1 à 10, caractérisée en ce que les pièces de renfort (31, 32; 33-36, 37, 38; 39) présentent un module d'élasticité plus élevé que le matériau environnant des pièces d'engrènement (2a, 2b, 2c).
12. Machine suivant l'une quelconque des revendications 1 à 11, caractérisée en ce que les pièces de renfort (31, 32; 33-36; 37, 38; 39) présentent un autre coefficient de dilatation calorifique que le matériau des pièces d'engrènement (2a, 2b, 2c), de telle façon qu'elles ont pour effet, dans le cas d'un échauffement, de faire fléchir radialement vers l'intérieur la pièce d'engrènement correspondante.
13. Machine suivant l'une quelconque des revendications 1 à 12, caractérisée en ce que les pièces latérales (17, 18) du rotor externe (2) sont reliées aux pièces d'engrènement (2a, 2b, 2c) par l'intermédiaire des pièces de renfort (31, 32; 33-36).
14. Machine suivant l'une quelconque des revendications 1 à 13, caractérisée en ce que les pièces d'engrènement (2a, 2b, 2c) sont réalisés sous la forme de corps creux, les pièces de renfort (33-36; 37, 38) étant disposées au travers d'une entretoise médiane (43) des pièces d'engrènement.
EP86109611A 1985-09-20 1986-07-14 Machine à piston rotatif à axe interne Expired - Lifetime EP0218016B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86109611T ATE49625T1 (de) 1985-09-20 1986-07-14 Innenachsige drehkolbenmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4091/85A CH668289A5 (de) 1985-09-20 1985-09-20 Innenachsige drehkolbenmaschine.
CH4091/85 1985-09-20

Publications (2)

Publication Number Publication Date
EP0218016A1 EP0218016A1 (fr) 1987-04-15
EP0218016B1 true EP0218016B1 (fr) 1990-01-17

Family

ID=4269655

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86109611A Expired - Lifetime EP0218016B1 (fr) 1985-09-20 1986-07-14 Machine à piston rotatif à axe interne

Country Status (7)

Country Link
US (1) US4735561A (fr)
EP (1) EP0218016B1 (fr)
JP (1) JPH079162B2 (fr)
AT (1) ATE49625T1 (fr)
CH (1) CH668289A5 (fr)
DE (1) DE3668344D1 (fr)
ES (1) ES2001535A6 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3700954A1 (de) * 1987-01-15 1988-07-28 Pierburg Gmbh Drehkolbenmaschine
FR2631488B1 (fr) * 1988-05-10 1990-07-27 Thomson Hybrides Microondes Circuit integre hyperfrequence de type planar, comportant au moins un composant mesa, et son procede de fabrication

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2053919A (en) * 1932-07-30 1936-09-08 Gulf Research Development Co Rotary pump
US3121341A (en) * 1960-05-25 1964-02-18 Francis A Hill Gears with rigid molded surfaces
FR1263024A (fr) * 1960-07-22 1961-06-05 Borsig Ag Machine à pistons rotatifs, comportant des pistons rotatifs disposes excentriquement l'un dans l'autre et engrenant entre eux, le piston rotatif extérieur étant composé de plusieurs éléments
US3139835A (en) * 1962-08-15 1964-07-07 Davey Compressor Co Rotary pump or motor
US4324536A (en) * 1980-02-28 1982-04-13 Caterpillar Tractor Co. Link-coupled rotor assembly

Also Published As

Publication number Publication date
ATE49625T1 (de) 1990-02-15
CH668289A5 (de) 1988-12-15
DE3668344D1 (de) 1990-02-22
JPH079162B2 (ja) 1995-02-01
JPS6291603A (ja) 1987-04-27
US4735561A (en) 1988-04-05
ES2001535A6 (es) 1988-06-01
EP0218016A1 (fr) 1987-04-15

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