EP0451669A1 - Machine à déplacement positif pour des fluides compressibles - Google Patents

Machine à déplacement positif pour des fluides compressibles Download PDF

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Publication number
EP0451669A1
EP0451669A1 EP91105196A EP91105196A EP0451669A1 EP 0451669 A1 EP0451669 A1 EP 0451669A1 EP 91105196 A EP91105196 A EP 91105196A EP 91105196 A EP91105196 A EP 91105196A EP 0451669 A1 EP0451669 A1 EP 0451669A1
Authority
EP
European Patent Office
Prior art keywords
displacement
displacer
chamber
application
machine
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.)
Ceased
Application number
EP91105196A
Other languages
German (de)
English (en)
Inventor
Otto Schäfer
Claus Müller
Lothar Mertens
Andreas Börstler
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.)
Volkswagen AG
Original Assignee
Volkswagen 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 Volkswagen AG filed Critical Volkswagen AG
Publication of EP0451669A1 publication Critical patent/EP0451669A1/fr
Ceased 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
    • F01C19/00—Sealing arrangements in rotary-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
    • 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

Definitions

  • the invention relates to a displacement machine for compressible media according to the preamble of claim 1, and a method for producing the displacement machine.
  • a generic displacement machine is known, for example, from DE-OS 31 41 525.
  • displacement machines of this type a rotor provided with spiral displacement bodies is moved in a housing also provided with spiral displacement chambers in such a way that approximately crescent-shaped work spaces are created. These move from the inlet of the displacement chamber to the outlet, their volume constantly being reduced and the pressure of the working medium being increased accordingly.
  • displacement machines have proven themselves in practice, in which the curvature of the displacement chamber and displacement body is dimensioned such that no contact occurs between them during operation, but a minimal radial residual gap remains. The dimensioning of the width of this sealing gap is problematic.
  • a fairly generous residual gap is easy to manufacture, but affects the delivery rate of the displacement machine. A very small remaining gap reverses these conditions exactly, so it is much more difficult to manufacture and results in a good delivery rate.
  • DE-OS 26 39 174 which is not of the generic type, discloses a displacement machine, the displacement body of which rotates in contact with the displacement chamber in the housing.
  • the contacting walls are provided with a self-lubricating layer for an effective radial seal.
  • the application of such self-lubricating layers is very complex because the raw material required for this must first be cut before the finished material can be glued in a further manufacturing step.
  • the invention has for its object to provide an effective seal between the individual work spaces for generic displacement machines, which enables a more cost-effective production of the displacement machine while increasing the degree of delivery.
  • the effect of the displacement machine is advantageously used for the distribution of the application mass.
  • Excess application mass is conveyed through the displacement machine itself from its inlet to the outlet and thus ensures a uniform distribution of the application mass over the entire circumference of the spiral walls.
  • the displacement chamber 3 is also a spiral, tongue or band-like displacement body 8 is held, the curvature of which is dimensioned such that it almost touches the inner and outer peripheral walls 6, 7 of the displacement chamber 3 in the embodiment shown in the drawing twice.
  • This displacement body 8 is now guided, for example, by attachment to an eccentrically drivable disk, not shown here, such that each of its points executes a circular movement delimited by the peripheral walls of the displacement chamber 3 when it is driven in the direction indicated by arrow 9.
  • the contour of this circular movement is indicated in the drawing by the circle 10, the point 11 entered in the circle each indicating a marked position of the driving eccentric.
  • an application mass 14 is preferably to be used which is oil, fuel and exhaust gas resistant.
  • the application mass 14 not only serves for radial sealing, but is also suitable for sealing the axial sealing gaps - not shown in the drawing - between the displacer body 8 and the displacer chamber 3.
  • the application mass 14 can, however, also be used in the axial seal in combination with sealing strips, also not shown in the drawing, which are arranged, for example, on the front edge of the displacer body 8 and which preferably touch the opposite wall of the displacer chamber 3 under an elastic prestress.
  • the application mass 14 acts as lubrication and thus ensures a uniformly good sealing effect over long operating times, because the wear of the sealing strips is considerably reduced.
  • the application mass 14 can be applied to individual displacement machines by hand, for example by brushing the walls in question with a brush.
  • a coating process that can be automated at low cost is desirable.
  • the already assembled displacement machine 1 at the inlet 4 can be completely filled with application mass while simultaneously moving the displacement body 8.
  • the displacer body 8 is then moved on until the excess application mass is conveyed out of the displacer 1.
  • a coating of the displacer 8 and of the housing 2 with a spray device is also easily automated.
  • the application compound must first be provided with a solvent so that it becomes sprayable. After the coating, the solvent then evaporates, so that the coating composition then adheres to the walls in a manner that prevents bleeding, even when the displacement machine 1 is in operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Coating Apparatus (AREA)
EP91105196A 1990-04-05 1991-04-02 Machine à déplacement positif pour des fluides compressibles Ceased EP0451669A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4010983 1990-04-05
DE4010983 1990-04-05

Publications (1)

Publication Number Publication Date
EP0451669A1 true EP0451669A1 (fr) 1991-10-16

Family

ID=6403807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91105196A Ceased EP0451669A1 (fr) 1990-04-05 1991-04-02 Machine à déplacement positif pour des fluides compressibles

Country Status (1)

Country Link
EP (1) EP0451669A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994012792A1 (fr) * 1992-12-03 1994-06-09 Europäische Atomgemeinschaft (Euratom) Procede et dispositif de reduction de l'ecartement entre une piece statique et une piece mobile

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2093317A5 (en) * 1970-06-10 1972-01-28 Hall Thermotank Int Ltd Compressor shaft seal - comprising a thixotropic grease resistant to refrigerants
GB1289473A (fr) * 1968-09-23 1972-09-20

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1289473A (fr) * 1968-09-23 1972-09-20
FR2093317A5 (en) * 1970-06-10 1972-01-28 Hall Thermotank Int Ltd Compressor shaft seal - comprising a thixotropic grease resistant to refrigerants

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 12, no. 464 (M-771)[3311] 06 Dezember 1988; & JP-A-63 186 980 (MATSUSHITA ELECTRIC WORKS) 02 August 1988, *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994012792A1 (fr) * 1992-12-03 1994-06-09 Europäische Atomgemeinschaft (Euratom) Procede et dispositif de reduction de l'ecartement entre une piece statique et une piece mobile
US5611659A (en) * 1992-12-03 1997-03-18 Europaische Atomgemeinschaft (Euratom) Method and a device for reducing the gap between a static part and a movable part

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