EP0494581A2 - Machine à pistons rotatifs - Google Patents

Machine à pistons rotatifs Download PDF

Info

Publication number
EP0494581A2
EP0494581A2 EP91810934A EP91810934A EP0494581A2 EP 0494581 A2 EP0494581 A2 EP 0494581A2 EP 91810934 A EP91810934 A EP 91810934A EP 91810934 A EP91810934 A EP 91810934A EP 0494581 A2 EP0494581 A2 EP 0494581A2
Authority
EP
European Patent Office
Prior art keywords
elevation
housing
rotary piston
piston machine
rib
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
EP91810934A
Other languages
German (de)
English (en)
Other versions
EP0494581B1 (fr
EP0494581A3 (en
Inventor
Peter Kuhn
Frank Obrist
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.)
TES WANKEL TECHNISCHE FORSCHUNGS- und ENTWICKLUNGSSTELLE LINDAU GmbH
Original Assignee
TES WANKEL TECHNISCHE FORSCHUNGS- und ENTWICKLUNGSSTELLE LINDAU GmbH
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 TES WANKEL TECHNISCHE FORSCHUNGS- und ENTWICKLUNGSSTELLE LINDAU GmbH filed Critical TES WANKEL TECHNISCHE FORSCHUNGS- und ENTWICKLUNGSSTELLE LINDAU GmbH
Publication of EP0494581A2 publication Critical patent/EP0494581A2/fr
Publication of EP0494581A3 publication Critical patent/EP0494581A3/de
Application granted granted Critical
Publication of EP0494581B1 publication Critical patent/EP0494581B1/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
    • F01C19/00—Sealing arrangements in rotary-piston machines or engines
    • F01C19/02—Radially-movable sealings for working fluids

Definitions

  • the invention relates to a rotary piston machine with rotors enclosed in a common housing and rotatable about fixedly arranged axes, surfaces of the outer circumference of at least one of the rotors executing their orbital movement around one of the axes with a gap-forming distance along at least one cylindrical inner surface of the housing.
  • the rotor takes on a larger diameter under the influence of centrifugal force and the operating temperature, and that the housing suffers from heat distortion.
  • the sealing gap design aims at the fact that at the highest speed and most unfavorable temperature distribution there is a residual gap at all points which is just necessary to avoid the risk of large-area contact and consequent seizing of the rotor at the very high speeds that occur for example, 40 m / s and more, to be avoided with certainty
  • the invention has for its object to improve the sealing of the peripheral surface of a rotor against the housing inner surface in a machine of the type mentioned so that the machine can be produced with relatively little effort, that the smallest possible sealing gap width is realized and that the risk of seizing the rotor is eliminated.
  • the object is achieved in that at least one rib-like elevation formed from the housing material is provided on the inner surface of the housing, so that a sealing gap is formed between this elevation and the peripheral surface of the rotor, and that this sealing gap before the machine is started up for the first time is designed to be narrower than would be possible for non-contact operation in the entire speed and temperature range.
  • the peripheral surface of the barrel approaches the tip of the rib-like elevation with increasing speed and rotor temperature and finally wears away from its material due to wear and tear.
  • the rib-like elevation therefore only assumes its final shape and height when the machine runs in. In this way it is ensured that the rib-like elevation is never lower than is absolutely necessary for the runner to run freely.
  • a rib-like elevation can be produced in a simple manner by cold forming, in that a groove is formed on the inside surface of the housing by stamping by means of a knife-shaped punch or by rolling in by means of a roller which is acute-angled in cross section, so that it is displaced as plastic on one or both sides of the groove arises.
  • the inner-axis rotary piston machine shown in Figs. 1 and 2 e.g. for the compression of gaseous media, is known in its mode of operation from DE-B-34 32 915 (US-A-4,714, 417).
  • Their inner rotor 1 and outer rotor 2 rotate about the axes 4, 5 which are fixed relative to the machine housing 3, so that the peripheral surfaces of both rotors 1, 2 move on circular paths, as the phase diagrams in FIG.
  • the circumferential surfaces 8, 9, 10 of the outer rotor 2 which are shaped according to a circular cylinder surface, move at a constant, gap-forming, small distance along changing regions of the circular cylindrical inner surface 14 of the housing 3.
  • the rib-like elevations 11, 16, which are essential to the invention, are provided in certain areas of the cylindrical inner surface 14 of the housing 3. They are not visible due to the representation scale in Fig. 1 and 2.
  • FIG. 3 shows an enlarged detail from FIG. 2 in the region of the gap between the peripheral surface 9 of the outer rotor 2 and the inner surface 14 of the housing 3 with two of the rib-like elevations 11 according to the invention on both sides of a rolled-in groove 12 when the machine is new.
  • the elevations 11 or the groove 12 run over the entire axial extent of the outer rotor 2 shown in FIG. 1.
  • FIG. 4 shows the same enlarged detail as FIG. 3, but in the state of greatest approximation, due to centrifugal force and thermal expansion, of the peripheral surface 9 of the outer rotor 2 on the inner surface 14 of the housing 3 or on the rib-like elevations 11.
  • the dashed lines 13 illustrate the very small volume of material removed by wear until the condition shown is reached.
  • FIG. 5 again shows the same enlarged detail as FIG. 3, but in the state of average approximation of the peripheral surface 9 of the outer rotor 2 to the elevation 11.
  • the sealing gap between the peripheral surface 9 and the elevations 11 is no further than it is for the freewheeling of the outer rotor 2 in the housing 3 taking into account all operating conditions is absolutely necessary.
  • the width of the sealing gap is therefore the smallest possible.
  • FIG. 6 shows a view of the cylindrical inner surface 14 of the housing 3, which is unwound in the plane, with the suction space 6 and the pressure space 7.
  • the respective connections are indicated by arcs, the direction of flow by arrows.
  • Figures 7, 8 and 9 illustrate how the sealing gap-forming elevations are created by material displacement by the one or two grooves squeezed out material forms a bulge-like bulge of the groove edges.
  • FIG. 7 shows, for example, the formation of the groove 12 shown in FIG. 3 with the rib-like elevations 11 on both sides by rolling in by means of a roller 15.
  • FIG. 8 shows the formation of a single rib-like elevation 16 on one side of a groove 17 by rolling in with an obliquely arranged correspondingly profiled roller 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)
EP91810934A 1990-12-28 1991-12-02 Machine à pistons rotatifs Expired - Lifetime EP0494581B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4139/90 1990-12-28
CH4139/90A CH682587A5 (de) 1990-12-28 1990-12-28 Rotationskolbenmaschine.

Publications (3)

Publication Number Publication Date
EP0494581A2 true EP0494581A2 (fr) 1992-07-15
EP0494581A3 EP0494581A3 (en) 1992-08-26
EP0494581B1 EP0494581B1 (fr) 1995-03-22

Family

ID=4270546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810934A Expired - Lifetime EP0494581B1 (fr) 1990-12-28 1991-12-02 Machine à pistons rotatifs

Country Status (5)

Country Link
US (1) US5147194A (fr)
EP (1) EP0494581B1 (fr)
JP (1) JPH05118281A (fr)
CH (1) CH682587A5 (fr)
DE (1) DE59105005D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH685450A5 (de) * 1992-04-01 1995-07-14 Lindau Tech Forsch & Entw Gmbh Innenachsige Drehkolbenmaschine.

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE547826C (de) * 1928-07-27 1932-04-07 Expl Des Procedes Maurice Lebl Zahnradverdichter
DE556181C (de) * 1930-03-18 1932-08-09 Hugo Grasse Zahnradmaschine mit Inneneingriff, insbesondere als Geblaese
US1993721A (en) * 1934-01-11 1935-03-05 Gulf Res & Dev Corp Packing
US2902980A (en) * 1956-04-26 1959-09-08 Elmer G Barrett Rotary motor and radial sliding vane therefor
FR1278136A (fr) * 1960-10-27 1961-12-08 Machine volumétrique à capacités engrenantes
US3652191A (en) * 1970-06-22 1972-03-28 Trw Inc Compressor
JPS5851286A (ja) * 1981-09-22 1983-03-25 Kayaba Ind Co Ltd ギヤポンプの歯先シ−ル機構
DE3219757A1 (de) * 1982-05-26 1983-12-01 Volkswagenwerk Ag, 3180 Wolfsburg Dichtungsanordnung
CH664423A5 (de) * 1984-06-12 1988-02-29 Wankel Felix Innenachsige drehkolbenmaschine.
US4717322A (en) * 1986-08-01 1988-01-05 Toyota Jidosha Kabushiki Kaisha Roots-type fluid machine
DE3735433C2 (de) * 1986-10-28 1996-02-29 Volkswagen Ag Verdrängermaschine für kompressible Medien
DE3721978A1 (de) * 1987-07-03 1989-01-12 Pierburg Gmbh Drehkolbenmaschine

Also Published As

Publication number Publication date
JPH05118281A (ja) 1993-05-14
DE59105005D1 (de) 1995-04-27
EP0494581B1 (fr) 1995-03-22
US5147194A (en) 1992-09-15
CH682587A5 (de) 1993-10-15
EP0494581A3 (en) 1992-08-26

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