EP0217020B1 - Machine à piston rotatif à axe interne - Google Patents

Machine à piston rotatif à axe interne Download PDF

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Publication number
EP0217020B1
EP0217020B1 EP86109614A EP86109614A EP0217020B1 EP 0217020 B1 EP0217020 B1 EP 0217020B1 EP 86109614 A EP86109614 A EP 86109614A EP 86109614 A EP86109614 A EP 86109614A EP 0217020 B1 EP0217020 B1 EP 0217020B1
Authority
EP
European Patent Office
Prior art keywords
external rotor
side walls
radially
engagement
casting
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
Application number
EP86109614A
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German (de)
English (en)
Other versions
EP0217020A1 (fr
Inventor
Otto Kraic
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
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT86109614T priority Critical patent/ATE42991T1/de
Publication of EP0217020A1 publication Critical patent/EP0217020A1/fr
Application granted granted Critical
Publication of EP0217020B1 publication Critical patent/EP0217020B1/fr
Expired 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/101—Permanent cores

Definitions

  • the invention relates to an internal-axis rotary piston machine, the external and internal rotors of which can be rotated about geometrical axes running through their center of gravity and parallel to one another with an integer ratio of different uniform angular velocities. which adjoins a radially outer region with surfaces which are parallel to one another or form an extension to the outside, and the engagement spaces in the axial direction are delimited by surfaces of side walls running perpendicular to the axis.
  • Machines of this type are known in numerous embodiments.
  • a machine with a speed ratio between external and internal rotor of 2: 1 is known for example from EP-A 0 087 747.
  • Machines in which this speed ratio is 3: 2 and 4: 3 are shown in the unpublished DE-3 432 915. Due to the mounting of their two rotors about axes running through their center of gravity, such machines are suitable for very high rotational speeds, so that they can be carried out with small dimensions for high throughput.
  • the pressure level that can be achieved when used as a compressor depends heavily on the precision of manufacture. Likewise, efficiency when used as a gas flow powered machine, i.e. as a driver, depends on the precision of the manufacture or on the accuracy of the mutual intervention of the runners.
  • the invention has for its object to find a machine of the type mentioned, the rotor can be executed at relatively low manufacturing costs so that there are particularly tight sealing gaps between them and the machine efficiency is particularly high accordingly.
  • This object is achieved in that a radially outer part of the side walls of the outer rotor is formed in one piece therewith and at least one body fastened to an axial end of the outer rotor forms the radially inner part of these side walls, this body with a circular shape Axis of the outer rotor concentric recess sealingly encloses a stationary sealing body which limits the radially inner space of the machine in the axial direction and through which the shaft of the inner rotor is passed.
  • the invention also relates to a method for producing a machine according to the invention and a casting mold for carrying out this method according to claims 6 and 7.
  • the surfaces delimiting the engagement spaces in the circumferential direction are already fixed to one another due to the manufacture and can be axially parallel or with precise alignment relative with the accuracy achievable in the casting process produce each other so that the inner rotor can engage in these engagement spaces with particularly narrow sealing gaps.
  • Fig. 1 illustrates the general principle of operation of an internal-axis rotary piston machine known per se. Its two rotors 2, 3 rotate about stationary geometric axes 5, 6, which are at a distance from one another, relative to the machine housing 4. The arrangement is comparable to an internally toothed gear with a ratio of the number of teeth of 3: 2 and consequently a speed ratio of 2: 3. The individual phases of the relative movement between the outer rotor 2 and the inner rotor 3 are shown in FIG. 3 of the aforementioned DE-A 3 432 915.
  • the machine housing 4 With its circular-cylindrical inner surface with a small gap distance, the machine housing 4 encloses the outer surface 8 of the sector-shaped peripheral parts 9, 10, 11, which is circular in cross-section, so that these control the inlet and outlet openings 12, 13 of the machine housing.
  • outer rotor 2 Since the outer rotor 2 has to enclose the fixed shaft journals 14, 15, which are arranged offset to its axis 5, its side parts 16, 17, which connect its peripheral parts 9, 10, 11, enclose a sufficiently large circular opening 18. This opening is closed by a sealing body 19 or 20 which is firmly connected to the machine housing 4 and through which the respective shaft journal 14, 15 is guided.
  • One of the shaft journals 14 of the inner rotor 3 carries a toothed wheel 22 which meshes with a hollow toothed wheel 23 fastened to the outer rotor 2, although such a drive connection can also be avoided due to the intermeshing engagement between the two rotors 2, 3.
  • Both runners 2, 3 are supported by ball bearings 25, 25 ', 26 for the shaft journals 14, 15 of the inner rotor 3 or by ball bearings 27, 28 for each hub part 29, 30 of the outer rotor 2, which are located on the sealing bodies 19 on both sides , 20 support directly or via a bearing block 32 connected to them.
  • the diameter of the one enclosed by the side parts 16, 17 becomes Opening 18 and thus the outside diameter of the sealing bodies 19, 20 in this area are chosen to be as small as possible and at most so large that they do not extend over the sector-shaped peripheral parts 9, 10, 11.
  • the sealing between the side parts 16, 17 rotating with the outer rotor 2 and the fixed sealing bodies 19, 20 can be carried out by simple radial seals 40, 41, and a sealing gap lying in said radial plane is created between the side surfaces of the sector-shaped peripheral parts 9, 10, 11 of the outer rotor 2 and surfaces parallel to it, delimiting the engagement spaces 33, 34, 35, of the sealing bodies 19, 20 are avoided.
  • the outer rotor 2 of a machine consists of a cast part 54 and two hub bodies 55, 56 fastened to it laterally.
  • the cast part 54 comprises the sector-shaped peripheral parts 9, 10, 11 and side parts 16, 17 connecting them, of which three pairs are consequently present .
  • Their shape is an arc of a circle, with a width in the radial direction that is smaller than the largest dimension of the sector-shaped peripheral parts 9, 10, 11 in the radial direction. Consequently, the rounded portions 50, 51, 52 of the peripheral parts 9, 10, 11 are located within a circle which is concentric with the axis 5 of the outer rotor 2 and runs along the radially inner boundary edges 58, 59, 60 of the circular-shaped side parts 16, 17.
  • the radial seal 40, 41 is not overlapped by the peripheral parts 9, 10, 11, or is located within a circle tangent to the roundings 50, 51, 52, which coincides with the opening 18 according to FIG. 1, an inner, axially engages protruding edge 62, 63 (FIG. 6) of the hub body 55, 56 or a ring 64 inserted between the casting 54 and the respective hub body 55 'in the radial direction between the side parts 16, 17 of the outer rotor 2 and the sealing body 19, 20 and thus encloses the opening 18 so that the radial seal 40, 41 is located between this edge 62, 63 of the hub body, or the inserted ring 64 (FIG. 4) and the sealing body 19, 20.
  • the configuration of the outer rotor 2 can best be seen in the illustrations in FIGS. 2, 3 and 4. 4 shows in its right part an embodiment with an inserted ring 64, which could also be provided on the opposite side of the external rotor.
  • the external rotor 2 described has the essential advantage of being inexpensive and very dimensionally producible in a casting mold, which is shown in simplified form in FIG. 5. Because the side parts 16, 17 forming part of the same cast part 54 are located radially outward than the roundings 50, 51, 52 forming the undercuts, the latter can be formed by an inner molded part 66, and the finished cast part 54 can be shown in FIG Pull off this molded part 66 in the axial direction or the molded part 66 can be pulled out of the cast part 54 in the axial direction.
  • the side wall parts 16, 17, which would prevent an axial demolding movement, are shaped by radially movable mold slides 67, 68, 69.
  • the surfaces 70 lying against one another when the mold is closed can also run flat instead of in an arc shape.
  • the inner molded part 66 has a circular circumferential collar, through which the circular arc-shaped inner boundary edge 58, 59, 60 of the side parts 16, 17 is formed, which continues into a circumferential angular groove 72, 73 (FIG. 6).
  • This angular groove 72, 73 is provided for the engagement of the edge 62, 63 of the hub body 55, 56 and extends somt past the ends of the peripheral parts 9, 10, 11, as indicated in FIG. 2 by the broken line 74.
  • the mold slides 67, 68, 69 and the inner mold part 66 thus form three mold cavities 80, 81, 82 which are connected at their ends to form the side parts 16, 17 of the outer rotor 2 .
  • the molded parts are metallic and allow a high degree of shape accuracy and surface quality of the cast part 54, so that it does not have to be machined.
  • the outer rotor 2 can have different shapes in deviation from the exemplary embodiment shown.
  • the engagement spaces 33-35 can also be delimited by planes 85-86 which run outwards or which curve outwards instead of by planar and mutually parallel surfaces 44-49, as is indicated in FIG. 3 by dashed lines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Sealing Devices (AREA)
  • Reciprocating Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Hydraulic Motors (AREA)
  • Centrifugal Separators (AREA)
  • Soil Working Implements (AREA)
  • Vehicle Body Suspensions (AREA)

Claims (7)

1. Machine à piston rotatif à axe interne avec un rotor extérieur et un rotor intérieur qui sont enfermés dans un carter commun (4) présentant sur son pourtour un canal d'admission et un canal d'échappement (12, 13) et qui créent des enceintes de travail, ayant des volumes variables, qui sont rendues étanches les unes par rapport aux autres par le roulement et/ou le glissement, à leur séparation, de zones de surface variables des rotors (2, 3), tandis que des surfaces (44-49) limitant, sur la périphérie, des enceintes de travail (33-35) du rotor extérieur (2) forment vers l'intérieur un élargissement (50-52), que ces enceintes de travail (33-35) sont délimités, dans le sens axial, par des parois latérales (16, 17, 62-64) et que des moyeaux (29, 30) sont prévus sur ces parois latérales, caractérisée en ce qu'une partie extérieure radialement (16, 17) des parois latérales du rotor extérieur (2) forme une seule pièce (54) avec les pièces de travail (9-11) délimitant suivant la périphérie les enceintes de travail (33-35) et qu'au moins un corps (62-64) fixé à une extrémité axiale du rotor extérieur (2) forme la pièce intérieure radialement de ces parois latérales (16, 17, 62-64), étant donné que ce corps (62-64) enveloppe, en assurant l'étanchéité, un corps fixe d'étanchéité (19, 20) avec un évidement circulaire (18) concentrique à l'axe (5) du rotor extérieur (2), corps fixe qui limite, dans la direction axiale, le volume intérieur radialement de la machine et au travers duquel traverse l'arbre (14, 15) du rotor intérieur (3).
2. Machine suivant la revendication 1, caractérisée en ce que la partie intérieure radialement des parois latérales (16, 17, 62-64) du rotor extérieur (2) est formée par une couronne (62, 63) située, dans la direction axiale, à distance d'un élément de moyeu (55, 56) solidaire du rotor extérieur (2).
3. Machine suivant la revendication 1, caractérisée en ce que la partie intérieure radialement des parois latérales (16, 17, 62-64) du rotor extérieur (2) est formée d'un anneau (64) qui est maintenu entre les pièces périphériques (9, 10, 11) séparant les unes des autres, sur leur périphérie, les enceintes de travail (33-35) et un corps (55') fixé latéralement sur le rotor extérieur (2).
4. Machine suivant la revendication 1, caractérisée en ce que les surfaces délimitant, sur leur périphérie, les enceintes de travail (33-35) se raccordent par paires (45, 46; 47, 48; 49, 44) par l'intermédiaire d'un arrondi (50-52) formant élargissement.
5. Machine suivant la revendication 4, caractérisée en ce que les arrondis (50-52) se raccordent radialement vers l'extérieur à des surfaces planes (44-49), la partie intérieure radialement (62-64) des parois latérales (16, 17, 62-64) s'étendant radialement vers l'extérieur au moins jusqu'au point de raccordement entre les arrondis (50-52) et les surfaces planes (44-49).
6. Procédé de fabrication de la machine suivant la revendication 1, caractérisé en ce qu'au moins le rotor extérieur (2) est fabiqué comme pièce de fonderie (54), les enceintes de travail (33-35) du rotor extérieur (2) étant formées au moyen de pièces de moule (67-69) mobiles radialement et de zones extérieures d'une pièce de moule intérieure (66) pouvant se déplacer axialement par rapport à la pièce de fonderie (54) et l'évidement, rendant possible le déplacement axial de la pièce de fonderie (54) par rapport à la pièce de moule intérieure (66), étant réduit en fixant un corps (62-64) sur la pièce de fonderie (54).
7. Moule de fonderie pour l'exécution du procédé suivant la revendication 6, caractérisé par une pièce de moule intérieure (66) dont l'axe longitudinal coïncide avec l'axe (5) de la pièce de fonderie (54) à fabriquer et qui présente sur son pourtour des évidements en forme de canaux, pour réaliser la zone intérieure radialement des enceintes de travail (33-35) de la pièce de fonderie (54), zone présentant la contre-dépouille (50-52), et par des coulisses de moulage (67-69) pour réaliser la zone extérieure radialement de ces enceintes de travail (33-35).
EP86109614A 1985-08-31 1986-07-14 Machine à piston rotatif à axe interne Expired EP0217020B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86109614T ATE42991T1 (de) 1985-08-31 1986-07-14 Innenachsige drehkolbenmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3741/85 1985-08-31
CH3741/85A CH667491A5 (de) 1985-08-31 1985-08-31 Innenachsige drehkolbenmaschine.

Publications (2)

Publication Number Publication Date
EP0217020A1 EP0217020A1 (fr) 1987-04-08
EP0217020B1 true EP0217020B1 (fr) 1989-05-10

Family

ID=4262498

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86109614A Expired EP0217020B1 (fr) 1985-08-31 1986-07-14 Machine à piston rotatif à axe interne

Country Status (7)

Country Link
US (1) US4850831A (fr)
EP (1) EP0217020B1 (fr)
JP (1) JPS6291601A (fr)
AT (1) ATE42991T1 (fr)
CH (1) CH667491A5 (fr)
DE (1) DE3663278D1 (fr)
ES (1) ES2001217A6 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2283441C1 (ru) * 2005-09-30 2006-09-10 Иван Соломонович Пятов Трохоидная роторная машина (варианты)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US724994A (en) * 1900-10-26 1903-04-07 Cooley Epicycloidal Engine Dev Company Rotary fluid-engine.
DE325849C (de) * 1917-03-03 1920-09-21 Emil Ludwig Zahnradpumpe, bei welcher ein Stirnrad mit einem innen verzahnten Hohlrad zusammenarbeitet
US1787543A (en) * 1929-01-03 1931-01-06 Nichols Thomas Winter Rotary compressor
US2053919A (en) * 1932-07-30 1936-09-08 Gulf Research Development Co Rotary pump
US2539044A (en) * 1945-08-27 1951-01-23 Gulf Research Development Co Fluid separation apparatus
US2458958A (en) * 1947-04-30 1949-01-11 Gulf Research Development Co Internal gear pump and compressor
FR1504705A (fr) * 1966-10-24 1967-12-08 Système volumétrique à couple d'engrenages conjugués
CH664193A5 (de) * 1982-03-03 1988-02-15 Wankel Felix Abgasbetriebener rotationskolbenlader.

Also Published As

Publication number Publication date
EP0217020A1 (fr) 1987-04-08
CH667491A5 (de) 1988-10-14
ES2001217A6 (es) 1988-05-01
JPS6291601A (ja) 1987-04-27
US4850831A (en) 1989-07-25
ATE42991T1 (de) 1989-05-15
DE3663278D1 (en) 1989-06-15

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