EP2673471B1 - Élément d'étanchéité pour machine à piston rotatif - Google Patents

Élément d'étanchéité pour machine à piston rotatif Download PDF

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Publication number
EP2673471B1
EP2673471B1 EP12700992.6A EP12700992A EP2673471B1 EP 2673471 B1 EP2673471 B1 EP 2673471B1 EP 12700992 A EP12700992 A EP 12700992A EP 2673471 B1 EP2673471 B1 EP 2673471B1
Authority
EP
European Patent Office
Prior art keywords
sealing
sealing part
rotary piston
piston machine
channel
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.)
Active
Application number
EP12700992.6A
Other languages
German (de)
English (en)
Other versions
EP2673471A2 (fr
Inventor
Heinz Raubacher
Uwe Koch
Marko VOIGT
Markus Alber
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.)
RAUBACHER, HEINZ
Original Assignee
Individual
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
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Publication of EP2673471A2 publication Critical patent/EP2673471A2/fr
Application granted granted Critical
Publication of EP2673471B1 publication Critical patent/EP2673471B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B31/00—Component parts, details, or accessories not provided for in, or of interest apart from, other groups
    • 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
    • F01C19/005—Structure and composition of sealing elements such as sealing strips, sealing rings and the like; Coating of these elements
    • 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
    • F01C19/10—Sealings for working fluids between radially and axially movable parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/003—Sealings for working fluid between radially and axially moving parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0034—Sealing arrangements in rotary-piston machines or pumps for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • F04C15/0038—Shaft sealings specially adapted for rotary-piston machines or pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/008—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • F04C27/009—Shaft sealings specially adapted for pumps
    • 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
    • F01C1/02—Rotary-piston machines or engines of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F01C1/063—Rotary-piston machines or engines of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents with coaxially-mounted members having continuously-changing circumferential spacing between them
    • 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
    • F01C9/00—Oscillating-piston machines or engines
    • F01C9/002—Oscillating-piston machines or engines the piston oscillating around a fixed axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/04—PTFE [PolyTetraFluorEthylene]

Definitions

  • the channel formed in the second sealing part can be undercut in such a way that the bottom region of the channel widens in the direction of the radial sealing surface of the first sealing part.
  • the thickness of the elastic material between the channel and the first sealing part is reduced in the radial direction and the contact pressure of the radial sealing surface as a result of the pressurization of the channel is increased.
  • the channel formed in the second sealing part is open to the first sealing part.
  • the hydraulic fluid introduced into the channel comes into direct contact with the first sealing part, in particular with an area of the first sealing part having the axial sealing surface, so that the force transmission is particularly effective.
  • the channel cannot be open to the outside along the entire circumference of the sealing element, since otherwise the second sealing part would lose its structural integrity.
  • one or more openings are therefore provided in the second sealing part, which preferably run in the axial direction through the second sealing part and end in the channel.
  • the Figure 2 shows a section of a rotary piston machine 12 according to the invention, the two sealing elements 10 according to FIG figure 1 includes.
  • the structure and function of such a rotary piston machine are detailed in FIG DE 10 2007 001 021 A1 described.
  • the sealing element 10 comprises a first sealing part 14 and a second sealing part 16, which are both designed to be rotationally symmetrical with respect to the axis of rotation.
  • the first sealing part 14 forms a dynamic area and the second sealing part 16 forms a static area of the two-piece sealing element 10.
  • the first sealing part 14 comprises a radial area 18 with a radial sealing surface 20 and an axial area 22 with an axial sealing surface 24.
  • the radial sealing surface 20 and the axial sealing surface 24 abut one another along an edge 26, the edge 26 being annular or circular arc-shaped .
  • the second sealing part 16 is offset radially inward with respect to the radial area 18 and axially offset with respect to the axial area 22.
  • the axial sealing surfaces 24 of the two sealing elements 10 are each oriented towards opposite surfaces 28 of a lever 30.
  • the lever 30 is an essentially circular traction sheave, which on the one hand has a piston 32 and on the other hand has an in the Figure 2 Rotary body not shown (eg a shaft) is firmly connected.
  • the piston 32 is movably supported in an annular channel 34, and the lever 30 is guided in an annular gap 36, which is introduced into the wall 38 of the annular channel 32, so that it can rotate about the axis of rotation.
  • a channel 42 is formed in the second sealing part 16 and extends along the entire circumference of the sealing element 10.
  • the channel 42 is closed to the first sealing part 14 and continuously open to the outside.
  • the channel 42 is acted upon by the pressurized hydraulic fluid via one or more fluid feeds 43 in the wall 38.
  • force is transmitted to the axial area 22 of the first sealing part 14 (and to a lesser extent also to the radial area 18), so that the inclination of the axial sealing surface 24 is increasingly canceled and finally the entire axial sealing surface 24 on the surface 28 of the lever 30 is applied.
  • the sealing effect of the sealing element 10 according to the invention thus increases in accordance with the pressure of the hydraulic fluid to be sealed in the annular channel 34 of the rotary piston machine 12.
  • the sealing elements 10 are received in corresponding recesses 44 of the wall 38 of the annular channel 34 and held there in a form-fitting and / or force-fitting manner.
  • the sealing elements 10 are glued into the recesses 44, e.g. by means of a polyurethane glue.
  • the radial sealing surface 20 of the sealing element 50 has a smaller expansion in the axial direction, i.e. the radial sealing surface 20 is smaller.
  • the channel 42 is undercut in the second sealing part 16, i.e. the bottom area 52 of the channel 42 has an expansion 54 in the radial direction outward.
  • the Figure 4 shows a third embodiment of a sealing element, which is designated as a whole with 60.
  • the sealing element 60 also corresponds to the sealing element 10 according to the first exemplary embodiment, apart from the differences in structure described below.
  • the channel 42 is closed towards the outside along the circumference of the second sealing part 16.
  • the fluid is introduced into the channel 42 via one or more bores 64, which run in the axial direction through the second sealing part 16 and the steel profile 62.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sealing Devices (AREA)
  • General Details Of Gearings (AREA)

Claims (13)

  1. Machine à piston rotatif (12) avec au moins un canal annulaire (34) courbé le long d'un arc de cercle au moins partiel, dans lequel un piston (32) est monté mobile, et une fente annulaire (36) ménagée dans la paroi (38) du canal annulaire (34), dans laquelle un levier (30) pouvant tourner autour d'un axe de rotation coaxial avec le canal annulaire (34) est guidé,
    dans laquelle la machine à piston rotatif (12) comprend au moins deux éléments d'étanchéité (10 ; 50 ; 60) destinés à étanchéifier le levier (30), qui sont logés dans des évidements (44) correspondants de la paroi (38) du canal annulaire (34),
    caractérisée en ce que les éléments d'étanchéité (10 ; 50 ; 60) comprennent respectivement une première partie d'étanchéité (14), qui forme une zone dynamique, et une deuxième partie d'étanchéité (16), qui forme une zone statique,
    - dans laquelle la zone dynamique (14) présente une surface d'étanchéité axiale (24), qui est tournée vers la fente annulaire (36) et délimite celle-ci, et une surface d'étanchéité radiale (20), qui est tournée vers l'intérieur du canal annulaire (34) et délimite celui-ci ;
    - dans laquelle la surface d'étanchéité axiale (24) et la surface d'étanchéité radiale (20) se touchent le long d'un bord (26) annulaire ou en forme d'arc de cercle, lequel s'étend le long d'une périphérie extérieure du levier ;
    - dans laquelle la deuxième partie d'étanchéité (16) est décalée radialement vers l'intérieur par rapport à la surface d'étanchéité radiale (20) et axialement par rapport à la surface d'étanchéité axiale (24) ; et
    - dans laquelle la zone statique (16) sert à fixer l'élément d'étanchéité (10 ; 50 ; 60) sur la machine à piston rotatif (12), et dans laquelle un canal (42), qui est soumis à l'effet d'un fluide, est réalisé dans la zone statique (16), de sorte que le fluide transmet une force sur la surface d'étanchéité axiale (24),
    de sorte que les surfaces d'étanchéité axiales (24) de deux éléments d'étanchéité (10 ; 50 ; 60) sont orientées respectivement en direction des surfaces (28) opposées du levier (30) et les surfaces d'étanchéité radiales (20) des éléments d'étanchéité (10 ; 50 ; 60) sont orientées en direction de l'intérieur du canal annulaire (34), et une section des surfaces d'étanchéité radiales (20) s'applique contre le piston (32).
  2. Machine à piston rotatif (12) selon la revendication 1, dans laquelle la première partie d'étanchéité (14) est formée d'un fluoropolymère, qui n'est pas un élastomère.
  3. Machine à piston rotatif (12) selon la revendication 2 ou 3, dans laquelle la deuxième partie d'étanchéité (16) est formée d'un élastomère.
  4. Machine à piston rotatif (12) selon l'une quelconque des revendications précédentes, dans laquelle la surface d'étanchéité axiale (24) de la première partie d'étanchéité (14) est inclinée par rapport à un plan perpendiculaire à l'axe de rotation.
  5. Machine à piston rotatif (12) selon l'une quelconque des revendications 2 à 4, dans laquelle le fluoropolymère comprend un PTFE homopolymère ou un copolymère de tétrafluoroéthylène avec au moins un co-monomère.
  6. Machine à piston rotatif (12) selon l'une quelconque des revendications 3 à 5, dans laquelle l'élastomère comprend un élastomère thermoplastique, en particulier un polyuréthane.
  7. Machine à piston rotatif (12) selon l'une quelconque des revendications 1 à 6, dans laquelle la première et la deuxième partie d'étanchéité (14, 16) sont reliées l'une à l'autre par liaison de matières.
  8. Machine à piston rotatif (12) selon la revendication 7, dans laquelle la deuxième partie d'étanchéité (16) est fondue sur la première partie d'étanchéité (14).
  9. Machine à piston rotatif (12) selon la revendication 7, dans laquelle la première et la deuxième partie d'étanchéité (14, 16) sont fabriquées par coextrusion du fluoropolymère et de l'élastomère.
  10. Machine à piston rotatif (12) selon l'une quelconque des revendications 1 à 9, dans laquelle le canal (42) formé dans la deuxième partie d'étanchéité (16) est fermé en direction de la première partie d'étanchéité (14).
  11. Machine à piston rotatif (12) selon l'une quelconque des revendications 1 à 9, dans laquelle le canal (42) formé dans la deuxième partie d'étanchéité (16) est ouvert en direction de la première partie d'étanchéité (14).
  12. Machine à piston rotatif (12) selon la revendication 11, dans laquelle le canal (42) est délimité par un profilé métallique (62) en forme de cuvette en section transversale, ouvert en direction de la première partie d'étanchéité (14).
  13. Machine à piston rotatif (12) selon l'une quelconque des revendications précédentes, dans laquelle les éléments d'étanchéité (10 ; 50 ; 60) sont collés dans les évidements (44).
EP12700992.6A 2011-02-10 2012-01-25 Élément d'étanchéité pour machine à piston rotatif Active EP2673471B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011003934A DE102011003934A1 (de) 2011-02-10 2011-02-10 Dichtungselement für Kreiskolbenmaschine
PCT/EP2012/051076 WO2012107279A2 (fr) 2011-02-10 2012-01-25 Élément d'étanchéité pour machine à piston rotatif

Publications (2)

Publication Number Publication Date
EP2673471A2 EP2673471A2 (fr) 2013-12-18
EP2673471B1 true EP2673471B1 (fr) 2020-09-02

Family

ID=45529107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12700992.6A Active EP2673471B1 (fr) 2011-02-10 2012-01-25 Élément d'étanchéité pour machine à piston rotatif

Country Status (5)

Country Link
US (1) US9074475B2 (fr)
EP (1) EP2673471B1 (fr)
CN (1) CN103502573B (fr)
DE (1) DE102011003934A1 (fr)
WO (1) WO2012107279A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800004699A1 (it) * 2018-04-19 2019-10-19 Guarnizione d'emergenza
DE102019112796A1 (de) * 2019-05-15 2020-11-19 HR Flurfördergeräte GmbH Kreiskolbenmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3825272A (en) * 1971-05-19 1974-07-23 Townsend Engineering Co Face seal for food processing equipment
JPS564061U (fr) * 1979-06-22 1981-01-14
US5055015A (en) * 1988-05-23 1991-10-08 Atsugi Motor Parts Company, Limited Seal structure for rotary body and vane-type rotary compressor employing the same
US6290235B1 (en) * 1997-07-02 2001-09-18 Parker-Hannifin Corporation Sealing system for a reciprocating shaft
EP2530364A1 (fr) * 2010-01-26 2012-12-05 NOK Corporation Dispositif d'étanchéité, et dispositif de type pompe utilisant celui-ci

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1328410A (en) * 1915-09-07 1920-01-20 Howard L Weed Rotary engine
US1476784A (en) * 1920-01-02 1923-12-11 Weed Differential Rotary Motor Rotary internal-combustion engine
US1944875A (en) * 1926-02-26 1934-01-30 Bullington Motors Sealing means for annular cylinder engines
GB591781A (en) * 1943-08-05 1947-08-28 Richard Lee Snyder Improvements in or relating to rotary internal combustion engines
US2997318A (en) * 1957-08-01 1961-08-22 Parker Hannifin Corp Sealing rings for rods and shafts
US3829106A (en) * 1972-12-04 1974-08-13 Crane Packing Co High pressure lip seal
US4560174A (en) * 1983-12-02 1985-12-24 Berco S.P.A. Multi lip seal
CN1051777A (zh) * 1989-10-04 1991-05-29 尤贝尔机械有限公司 旋转活塞式机器的密封装置
DE4333047C1 (de) * 1993-09-29 1994-10-27 Freudenberg Carl Fa Dichtungsanordnung
US6737165B1 (en) 1998-08-06 2004-05-18 Omlidon Technologies Llc Melt-processible poly(tetrafluoroethylene)
US20060145426A1 (en) * 2004-12-30 2006-07-06 Schroeder Gary W Rotary seal
US8029714B2 (en) * 2005-09-12 2011-10-04 Federal-Mogul World Wide, Inc. Radial seal and method of making
DE102007001021B4 (de) 2007-01-02 2010-11-18 Heinz Raubacher Kreiskolbenmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3825272A (en) * 1971-05-19 1974-07-23 Townsend Engineering Co Face seal for food processing equipment
JPS564061U (fr) * 1979-06-22 1981-01-14
US5055015A (en) * 1988-05-23 1991-10-08 Atsugi Motor Parts Company, Limited Seal structure for rotary body and vane-type rotary compressor employing the same
US6290235B1 (en) * 1997-07-02 2001-09-18 Parker-Hannifin Corporation Sealing system for a reciprocating shaft
EP2530364A1 (fr) * 2010-01-26 2012-12-05 NOK Corporation Dispositif d'étanchéité, et dispositif de type pompe utilisant celui-ci

Also Published As

Publication number Publication date
US20130319222A1 (en) 2013-12-05
CN103502573A (zh) 2014-01-08
CN103502573B (zh) 2016-08-10
EP2673471A2 (fr) 2013-12-18
WO2012107279A3 (fr) 2013-07-25
DE102011003934A1 (de) 2012-08-16
US9074475B2 (en) 2015-07-07
WO2012107279A2 (fr) 2012-08-16

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