EP0158064A2 - Etanchéité pour machine à déplacement positif pour fluides compressibles - Google Patents

Etanchéité pour machine à déplacement positif pour fluides compressibles Download PDF

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Publication number
EP0158064A2
EP0158064A2 EP85101947A EP85101947A EP0158064A2 EP 0158064 A2 EP0158064 A2 EP 0158064A2 EP 85101947 A EP85101947 A EP 85101947A EP 85101947 A EP85101947 A EP 85101947A EP 0158064 A2 EP0158064 A2 EP 0158064A2
Authority
EP
European Patent Office
Prior art keywords
sealing strip
sealing
seal according
axial
section
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
EP85101947A
Other languages
German (de)
English (en)
Other versions
EP0158064A3 (en
EP0158064B1 (fr
Inventor
Klaus Dieter Dr. Emmenthal
Otto Schäfer
Claus Müller
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 EP0158064A2 publication Critical patent/EP0158064A2/fr
Publication of EP0158064A3 publication Critical patent/EP0158064A3/de
Application granted granted Critical
Publication of EP0158064B1 publication Critical patent/EP0158064B1/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
    • F01C19/00—Sealing arrangements in rotary-piston machines or engines
    • F01C19/08—Axially-movable sealings for working fluids

Definitions

  • the invention relates to a seal for sealing the axial gaps formed between the fixed housing and the rotating rotor of a positive displacement machine for compressible media according to the preamble of patent claim 1.
  • Known displacement machines for compressible media have at least one displacement chamber which is arranged in a fixed housing and is designed in the manner of a spiral-shaped slot, and each has a displacement body which is associated with and engaging in this, likewise in the form of a spiral, and which is mounted on a disk-shaped rotor which can be driven eccentrically relative to the housing is held.
  • spiral sealing strips are provided, each of which is held on the front edge of one component and pressed against a sealing surface arranged on the front side of the other component.
  • these sealing strips are axially resilient in longitudinal grooves on the end faces of the spiral components.
  • the spring action is formed by an elastomeric, cord-shaped element arranged in the base of the longitudinal groove.
  • Such Round cords have a tendency to settle after some time, so that the elastic spring effect is no longer present.
  • the installation of metallic springs in wave form or the like is provided instead of such elastomeric round cords.
  • the sealing strip is resiliently loaded as uniformly as possible over its entire length and that the characteristics of these springs are set such that they are only elastic in a first area, but then go from a certain spring travel to block to exclude the possibility of tarnishing of one component on the other.
  • the object underlying the invention is therefore to provide a seal for a positive displacement machine for compressible media, which avoids the disadvantages of the known designs as far as possible and which does not require the use of special spring elements.
  • the required elasticity of the sealing strip is thus achieved solely by the shape of the sealing strip, for example by specifically designing its cross section in such a way that it deforms elastically under the action of the axial load generated during installation.
  • a desired, advantageous spring characteristic of the sealing element can be set in particular by providing tapering on the end face and recesses on the end face and / or on the long sides of the cross section of the sealing strip, taking into account the material properties and taking into account the permissible surface pressure.
  • a spiral displacement body of a displacement machine designed as a spiral compressor is indicated, which on its axial end face has a longitudinal groove 4 for receiving a sealing strip 3, which is pressed resiliently against the sealing surface 5 of a fixed housing, for example at the base of a displacement chamber becomes.
  • the resilience of the sealing strip 3 is achieved through a targeted shaping.
  • recesses 6 are made on one of the end faces of the sealing strip 3, here on the end face lying in the bottom of the groove 4 of the rotor 1, so that the cross section under axial load is essential in this area is reduced. This reduction in cross-section leads to an increase in the stresses in the component, so that the component deforms elastically.
  • the recesses must be defined in such a way that, taking into account the material properties of the sealing strip, which can preferably consist of a filled plastic with good dry running properties, for example a mixture of Teflon and bronze, the plastic elongation limit of the material is not exceeded, so that the deformation remains in the elastic range.
  • the spring travel given by the elastic deformation must be so large that even taking into account the manufacturing tolerances given in the manufacture of the rotor 1 and the housing 2, which change the width of the axial gap "s" between the rotor 1 and the housing 2 , sufficient pressure of the sealing strip 3 on the sealing surface 5 is always maintained.
  • the spring travel of the sealing strip must not be so great that the gap width "s" becomes 0.
  • the desired elasticity of the sealing strip 3 ' is achieved through recesses 7 on the longitudinal sides of the sealing strip cross-section, the recesses being arranged on both longitudinal sides and opposite one another.
  • the recesses 7 are chosen to be semicircular here, but can also have any other shape.
  • the sealing strip 3 is T-shaped in cross section, so that it rests with a relatively wide contact surface on the sealing surface 5 of the housing 2.
  • recesses 8 are provided, which are triangular here, but not directly opposite, but offset from each other.
  • the elastic deformability of the sealing strip 3 ′′ in the axial direction is achieved in principle by a bending section in the form of a hook-shaped or lip-shaped cross-sectional taper 9, which in turn is attached here to the end face of the sealing strip facing away from the sealing surface 5 but can also be provided on the opposite side.
  • the bending section 9 is bent, the sealing strip 3 "'dipping deeper into the groove 4 of the rotor 1.
  • the maximum immersion depth which must in any case be smaller than the gap width s, in order to prevent a direct run-up of the end face of the rotor 1 on the sealing surface 5 of the housing 2, is achieved when the bending section 9 on the, for example, inclined contact surface 10 comes to the plant.
  • the dimensions of the hook-shaped or lip-shaped bending section 9 must be selected so that it also fits maximum axial load does not hit the side walls of the groove 4.
  • FIGS. 5 and 6 showing a cross section and FIG. 6 a side view of the sealing strip 3 ' v .
  • This sealing strip 3 ' v has on its end face facing away from the sealing surface 5 and immersing in the groove 4, a plurality of bending sections 11 lying one behind the other in the longitudinal direction, which have the shape of scale-like lamellae which are produced by incisions which are produced during a peeling process and which are continuous over the groove width 12 have arisen.
  • These slats 11 deflect transversely under axial load and thus also result in a spring action, the characteristics of which are determined by the width and cross section of the slats 11 and by the depth and width of the incisions 12.
  • the end face of these slats can be rounded, as shown in FIG. 5.
  • the shape or cross-sectional design of the sealing strips is selected or dimensioned such that, based on a permissible surface pressure and taking into account the material properties of the sealing strip, an elastic deformability is achieved, which at least also does not get into the plastic area compensates for the manufacturing tolerances to be taken into account during the manufacture of the components.
  • These recesses can be taken into account directly in the manufacture of the sealing strips in the form of a strand or can be produced by a simple machining process and therefore do not require any special and additional effort. Due to the inherent elasticity of the sealing strips achieved with the aid of these recesses, additional resilient components which place the sealing strip under axial tension are made unnecessary and the assembly of the sealing strips is considerably simplified.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sealing Devices (AREA)
EP85101947A 1984-03-23 1985-02-22 Etanchéité pour machine à déplacement positif pour fluides compressibles Expired EP0158064B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3410735 1984-03-23
DE3410735 1984-03-23

Publications (3)

Publication Number Publication Date
EP0158064A2 true EP0158064A2 (fr) 1985-10-16
EP0158064A3 EP0158064A3 (en) 1987-05-06
EP0158064B1 EP0158064B1 (fr) 1989-12-27

Family

ID=6231425

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85101947A Expired EP0158064B1 (fr) 1984-03-23 1985-02-22 Etanchéité pour machine à déplacement positif pour fluides compressibles

Country Status (2)

Country Link
EP (1) EP0158064B1 (fr)
DE (1) DE3575007D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0165714A2 (fr) * 1984-05-18 1985-12-27 Mitsubishi Denki Kabushiki Kaisha Appareil à volutes imbriquées et son procédé d'assemblage
EP0656462A1 (fr) * 1993-11-19 1995-06-07 Firma Carl Freudenberg Dispositif d'étanchéité
EP1229247A1 (fr) * 1999-11-04 2002-08-07 Honda Giken Kogyo Kabushiki Kaisha Machine a aube pour fluides
CN103089649A (zh) * 2012-10-30 2013-05-08 徐建涛 罗茨式蒸汽压缩机转子

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010000947B4 (de) * 2010-01-15 2015-09-10 Joma-Polytec Gmbh Flügelzellenpumpe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1105299A (fr) * 1954-05-25 1955-11-29 Seringues Ind Soc D Expl Des Joint perfectionné pour éléments coulissants
GB989588A (en) * 1962-08-30 1965-04-22 Rene Linder Rotary fluid delivering machine
DE2107203B1 (de) * 1971-02-16 1972-04-27 Praedifa Jaeger Kg Dichtungsring aus elastischem werkstoff
DE2133476A1 (de) * 1971-07-06 1973-01-25 Merkel Asbest & Gummiwerke Dichtring
US4192152A (en) * 1978-04-14 1980-03-11 Arthur D. Little, Inc. Scroll-type fluid displacement apparatus with peripheral drive
GB2072800A (en) * 1980-03-25 1981-10-07 Escher Wyss Ltd Hydrostatic bearing

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1105299A (fr) * 1954-05-25 1955-11-29 Seringues Ind Soc D Expl Des Joint perfectionné pour éléments coulissants
GB989588A (en) * 1962-08-30 1965-04-22 Rene Linder Rotary fluid delivering machine
DE2107203B1 (de) * 1971-02-16 1972-04-27 Praedifa Jaeger Kg Dichtungsring aus elastischem werkstoff
DE2133476A1 (de) * 1971-07-06 1973-01-25 Merkel Asbest & Gummiwerke Dichtring
US4192152A (en) * 1978-04-14 1980-03-11 Arthur D. Little, Inc. Scroll-type fluid displacement apparatus with peripheral drive
GB2072800A (en) * 1980-03-25 1981-10-07 Escher Wyss Ltd Hydrostatic bearing

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0165714A2 (fr) * 1984-05-18 1985-12-27 Mitsubishi Denki Kabushiki Kaisha Appareil à volutes imbriquées et son procédé d'assemblage
EP0165714B1 (fr) * 1984-05-18 1990-03-28 Mitsubishi Denki Kabushiki Kaisha Appareil à volutes imbriquées et son procédé d'assemblage
EP0656462A1 (fr) * 1993-11-19 1995-06-07 Firma Carl Freudenberg Dispositif d'étanchéité
EP1229247A1 (fr) * 1999-11-04 2002-08-07 Honda Giken Kogyo Kabushiki Kaisha Machine a aube pour fluides
US6688865B1 (en) * 1999-11-04 2004-02-10 Honda Giken Kogyo Kabushiki Kaisha Vane type fluid machinery having a deformable seal portion on the vane
EP1229247A4 (fr) * 1999-11-04 2004-05-26 Honda Motor Co Ltd Machine a aube pour fluides
CN103089649A (zh) * 2012-10-30 2013-05-08 徐建涛 罗茨式蒸汽压缩机转子
CN103089649B (zh) * 2012-10-30 2016-05-18 徐建涛 罗茨式蒸汽压缩机转子

Also Published As

Publication number Publication date
DE3575007D1 (de) 1990-02-01
EP0158064A3 (en) 1987-05-06
EP0158064B1 (fr) 1989-12-27

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