EP0158064B1 - 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
EP0158064B1
EP0158064B1 EP85101947A EP85101947A EP0158064B1 EP 0158064 B1 EP0158064 B1 EP 0158064B1 EP 85101947 A EP85101947 A EP 85101947A EP 85101947 A EP85101947 A EP 85101947A EP 0158064 B1 EP0158064 B1 EP 0158064B1
Authority
EP
European Patent Office
Prior art keywords
sealing
sealing strip
face
axial
displacement 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.)
Expired
Application number
EP85101947A
Other languages
German (de)
English (en)
Other versions
EP0158064A3 (en
EP0158064A2 (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 sealing strip 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 engages in each displacement chamber and engages in it and which is held on a disk-shaped rotor which can be driven eccentrically with respect to the housing .
  • spiral sealing strips are provided, each of which is held at 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 held axially resiliently 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.
  • 1 denotes a spiral displacement body of a displacement machine designed as a spiral compressor, 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.
  • Cross-sectional design have that they can deform elastically within certain limits under axial load, which is applied here for the purpose of pressing the sealing strip 3 against the sealing surface 5 during installation.
  • the resilience of the sealing strip 3 is achieved through a targeted shaping.
  • the sealing strip 3 has on its end face facing away from the sealing surface 5 and dipping into the groove 4 a plurality of bending sections 6 lying one behind the other in the longitudinal direction, which have the shape of scale-like lamellae, which are produced by axial and over the groove during a peeling process wide continuous incisions 7 have arisen.
  • These slats 6 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 6 and by the depth and width of the incisions 7.
  • the end face of these slats 6 can be rounded.
  • the sealing strip 3 can preferably consist of a filled plastic with good dry-running properties, for example of a mixture of Teflon and bronze. Regardless of the sealing strip material used, the plastic expansion limit must not be exceeded, so that the deformation remains in the elastic range.
  • the spring deflection 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, always a sufficient pressure of the sealing strip 3 on the sealing surface 5 is maintained. On the other hand, the spring travel of the sealing strip must not be so great that the gap width "s" becomes 0.
  • sealing strips according to the invention gives them their own elasticity, by means of which additional resilient components which place the sealing strip under axial tension can be dispensed with. In addition, 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)

Claims (2)

1. Segment (3) d'étanchéité, destiné à obturer les interstices axiaux formés entre les composants - carter fixe (2), rotor tournant (1) - d'une machine volumétrique pour fluides compressibles, le segment (3) d'étanchéité étant logé dans une gorge axiale (4) d'un des composants et étant appliqué axialement élastiquement contre une surface d'étanchéité placée sur le côté frontal de l'autre composant, le segment d'étanchéité ayant par ailleurs une forme qui admet une déformation élastique de celui-ci sous l'effet d'une contrainte axiale résultant du montage, caractérisé par le fait que sur le côté frontal du segment (3) d'étanchéité qui est opposé à la face (5) d'étanchéité, se trouve une série de pattes lamellaires flexibles (6) disposées les unes derrière les autres dans le sens de la longueur du segment (3) d'étanchéité, qui sont créées par des entailles axiales (7) traversant le segment (3) d'étanchéité dans toute sa largeur.
2. Segment d'étanchéité selon la revendication 1, caractérisé par le fait que les extrémités frontales des pattes lamellaires flexibles (6) sont arrondies.
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 EP0158064A2 (fr) 1985-10-16
EP0158064A3 EP0158064A3 (en) 1987-05-06
EP0158064B1 true 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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102844525A (zh) * 2010-01-15 2012-12-26 约马-综合技术有限公司 叶轮泵

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60243301A (ja) * 1984-05-18 1985-12-03 Mitsubishi Electric Corp スクロール流体機械及びその流体機械の組立て方法
DE4339527C1 (de) * 1993-11-19 1995-02-16 Freudenberg Carl Fa Dichtungsanordnung
JP2001132672A (ja) * 1999-11-04 2001-05-18 Honda Motor Co Ltd ベーン式流体機械
CN103089649B (zh) * 2012-10-30 2016-05-18 徐建涛 罗茨式蒸汽压缩机转子

Family Cites Families (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
CH385404A (fr) * 1962-08-30 1964-12-15 Linder Rene Machine volumétrique
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
AT368563B (de) * 1980-03-25 1982-10-25 Escher Wyss Ag Hydrostatisches stuetzelement, insbesondere fuer eine durchbiegungseinstellwalze zur druckbehandlung von materialbahnen, insbesondere papierbahnen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102844525A (zh) * 2010-01-15 2012-12-26 约马-综合技术有限公司 叶轮泵

Also Published As

Publication number Publication date
DE3575007D1 (de) 1990-02-01
EP0158064A3 (en) 1987-05-06
EP0158064A2 (fr) 1985-10-16

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