EP0298315B1 - Rotationskolben-Verdrängungsarbeitsmaschine - Google Patents

Rotationskolben-Verdrängungsarbeitsmaschine Download PDF

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Publication number
EP0298315B1
EP0298315B1 EP88110070A EP88110070A EP0298315B1 EP 0298315 B1 EP0298315 B1 EP 0298315B1 EP 88110070 A EP88110070 A EP 88110070A EP 88110070 A EP88110070 A EP 88110070A EP 0298315 B1 EP0298315 B1 EP 0298315B1
Authority
EP
European Patent Office
Prior art keywords
groove
sealing strip
displacement body
spiral
tube
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 - Lifetime
Application number
EP88110070A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0298315A1 (de
Inventor
Josef Perevuznik
Fritz Spinnler
Jürg Weber
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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 BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Priority to AT88110070T priority Critical patent/ATE60405T1/de
Publication of EP0298315A1 publication Critical patent/EP0298315A1/de
Application granted granted Critical
Publication of EP0298315B1 publication Critical patent/EP0298315B1/de
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
    • F01C19/00—Sealing arrangements in rotary-piston machines or engines
    • F01C19/08—Axially-movable sealings for working fluids

Definitions

  • the invention relates to a rotary piston displacement machine for compressible media, with at least one conveying space delimited by spiral, circumferential walls axially extending from a side wall, which leads from an inlet to an outlet, and with a spiral-shaped displacer projecting into the conveying space, with respect to is mounted on the conveying space for executing a circular twist-free movement and the center of which is eccentrically offset relative to the center of the peripheral walls such that the displacement body always touches both the outer and the inner peripheral wall of the conveying space at at least one progressive contact point, which touches the Side wall bordering end faces of the displacer are provided with a groove in which a sealing strip made of elastic and slidable material is inserted, and wherein between the bottom of the groove and the underside of the sealing strip e is arranged in the spring element.
  • EP-A-0 124 114 discloses the use of a hose made of an elastic material to form a spring element in a rotary displacement machine. In this solution, however, the element does not form the base for an elastic sealing strip, but at the same time exercises the function of the necessary sealing element.
  • a displacement machine of the type mentioned is known from US 3,994,636.
  • the displacer is provided with a groove on its end face; the seat is for a sealing strip lying therein.
  • This sealing strip consists of an elastic, slidable material and is dimensioned such that it can be moved axially and slightly radially within the groove. It is underlaid by a force-exerting spring element, which is a metallic spring band with a U-shaped cross section.
  • the design of the groove is limited. If, for example, the displacer only has a total thickness of 4 mm, the groove width can be a maximum of 2 mm.
  • the design mentioned has two shortcomings: On the one hand, the spring element must, if it is to cover the entire Nutresp. Extend sealing length, mechanically pre-bent to adapt to the spiral course of the groove; On the other hand, the achievable spring travel is extraordinarily small, as can be seen in the rest of FIG. 8 of said document; This has an unfavorable effect on the constancy of the contact pressure due to the spring characteristics.
  • the invention is therefore based on the object to provide a soft spring element in a rotary piston displacement machine of the type mentioned, which also allows easy handling, and with its spring force a safe and flawless sealing of the work spaces is guaranteed over longer operating times.
  • the advantage of the invention is to be seen in particular in the fact that the multi-part hose, which is easy to produce, can follow any radius of curvature in the intended bending plane without twisting, and that it can withstand temperatures of up to 150 ° C. without further ado.
  • This rear channel space can be connected to the pressure side of the displacement machine and is intended to provide a uniform pressurization of the sealing strips from the rear and thus a uniform contact of the sealing strips even with increasing wear.
  • the sealing strips must also fit very tightly on the sides so that the pressure does not escape from the rear area into the work area.
  • the machine shown is shown for the sake of simplicity with only one delivery chamber 6 and only one displacer 1. It goes without saying, however, that the displacer can have a whole system of spirals in the same plane, each of which, for example, can convey a common outlet 3 from its own inlet 2.
  • the disk-shaped displacer is designated as a whole by 1.
  • Spiral displacement bodies 5 are arranged on both sides of the disk 4. These engage in a delivery chamber 6 of the fixed housing 7.
  • the conveying space 6 is, for example, incorporated into the housing 7 in the manner of a spiral slot. It extends from an inlet 2 arranged on the outer circumference of the spiral in the housing to an outlet 3 arranged inside the housing. It has essentially parallel circumferential walls 8, 9 which are arranged at a constant distance from one another and which, like the displacement body, has a spiral of more than 360 ° include.
  • the displacement body 5 is held between these peripheral walls 8, 9. Its curvature is dimensioned so that it touches the inner and outer peripheral walls in several places.
  • the center 10 of the displacement body 5 is offset eccentrically with respect to the center 11 of the delivery chamber 6.
  • the eccentric drive of the disk-shaped rotor having the displacement body 5 results in a circular movement of each of the points of the displacement body, this circular movement being limited by the peripheral walls of the delivery chamber.
  • crescent-shaped work spaces 12 enclosing the working medium result on both sides of the displacer body, which are advanced by the eccentric drive of the displacer body through the delivery space in the direction of the outlet. The volume of these working spaces is reduced and the pressure of the working fluid increases accordingly.
  • the displacement bodies are now provided on the end face with a circumferential groove 13, in which an elastic sealing strip 14 made of slidable material lies.
  • this groove 13 has a rectangular shape and receives the likewise rectangular sealing strip 14.
  • the cross-section of the sealing strip is approximately 1.8x2.3 mm with a groove width of approximately 2 mm. With parallel walls, this ensures both axial (outward) and slightly radial displaceability of the sealing strip.
  • the sealing strip should protrude about 0.4 mm over the edge of the end face during normal operation, the corresponding groove depth results from the sealing strip height remaining in the groove plus the space required for the force-exerting spring element.
  • a particular advantage is the property that the hose can easily follow any curve.
  • the choice of wall thickness is a simple means to set the required spring force.
  • the spring according to the invention is particularly effective even with greater abrasion of the sealing strip 14, since - starting from the compressed state, in which it has a height of twice the wall thickness - it is able to relax to its full diameter with an approximately constant spring force .
  • the groove 13 has on the pressure side, i.e. at the outlet end of the spiral, an outlet part that either extends beyond the area of the sealing strip or by which the sealing strip is shorter than the groove.
  • the hose is open so that the inside of the machine is pressurized with the final pressure.
  • a uniform contact of the sealing strip over the entire length thereof is achieved on the side surface 20. So that the pressurization inside the hose but at the other hose end does not lead to a constant loss of working fluid, the end on the inlet side is closed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Sealing Devices (AREA)
  • Actuator (AREA)
  • Reciprocating Pumps (AREA)
EP88110070A 1987-07-10 1988-06-24 Rotationskolben-Verdrängungsarbeitsmaschine Expired - Lifetime EP0298315B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88110070T ATE60405T1 (de) 1987-07-10 1988-06-24 Rotationskolben-verdraengungsarbeitsmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2638/87A CH673135A5 (enrdf_load_html_response) 1987-07-10 1987-07-10
CH2638/87 1987-07-10

Publications (2)

Publication Number Publication Date
EP0298315A1 EP0298315A1 (de) 1989-01-11
EP0298315B1 true EP0298315B1 (de) 1991-01-23

Family

ID=4238260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88110070A Expired - Lifetime EP0298315B1 (de) 1987-07-10 1988-06-24 Rotationskolben-Verdrängungsarbeitsmaschine

Country Status (7)

Country Link
US (1) US4883413A (enrdf_load_html_response)
EP (1) EP0298315B1 (enrdf_load_html_response)
JP (1) JPS6424192A (enrdf_load_html_response)
AT (1) ATE60405T1 (enrdf_load_html_response)
BR (1) BR8803459A (enrdf_load_html_response)
CH (1) CH673135A5 (enrdf_load_html_response)
DE (1) DE3861635D1 (enrdf_load_html_response)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02145686U (enrdf_load_html_response) * 1989-05-12 1990-12-11
US5014603A (en) * 1989-11-02 1991-05-14 Allied-Signal Inc. Hydraulic actuator having frangible or deformable components
EP0807759B1 (en) * 1990-02-13 2001-07-04 Anest Iwata Corporation Scroll-type fluid machinery
US5258046A (en) * 1991-02-13 1993-11-02 Iwata Air Compressor Mfg. Co., Ltd. Scroll-type fluid machinery with seals for the discharge port and wraps
JP2930269B2 (ja) * 1991-06-26 1999-08-03 アネスト岩田株式会社 スクロール流体機械
US5470083A (en) * 1991-09-16 1995-11-28 Unicraft Oy Seal assembly with a hard seal layer actuated through a silicone layer
EP0597804B1 (de) * 1992-11-07 1995-05-10 AGINFOR AG für industrielle Forschung Verdrängermaschine nach dem Spiralprinzip
US5366358A (en) * 1993-01-27 1994-11-22 Grenci Charles A Oil free scroll vacuum pump
WO1995021329A1 (en) * 1994-02-01 1995-08-10 Charles Grenci Improved oil free scroll vacuum pump
US6126422A (en) * 1997-10-24 2000-10-03 American Standard Inc. Tip seal for scroll type compressor and manufacturing method therefor
US6068459A (en) 1998-02-19 2000-05-30 Varian, Inc. Tip seal for scroll-type vacuum pump
WO2000006906A1 (en) 1998-07-30 2000-02-10 Varian, Inc. Scroll-type vacuum pump
CA2325752A1 (en) * 2000-06-01 2001-12-01 Michael V. Kazakis Oiless rotary scroll air compressor tipseal assembly
WO2010050163A1 (ja) * 2008-10-27 2010-05-06 パナソニック株式会社 密閉型圧縮機
JP5228812B2 (ja) * 2008-11-06 2013-07-03 パナソニック株式会社 密閉型圧縮機
KR20110101495A (ko) * 2010-03-08 2011-09-16 엘지전자 주식회사 압축기 및 이를 적용한 냉동기기
JP6622527B2 (ja) * 2015-09-10 2019-12-18 アネスト岩田株式会社 スクロール流体機械

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2832618A (en) * 1956-01-03 1958-04-29 North American Aviation Inc Transpiration cooled seal
GB908116A (en) * 1957-11-09 1962-10-17 Bird Instr Ltd Improvements in or relating to rotary pumps and motors
US3226126A (en) * 1963-01-30 1965-12-28 Robert B Plate Self-adjusting packing assembly
US3464707A (en) * 1966-09-29 1969-09-02 Int Harvester Co Piston oil control ring assembly
CH586348A5 (enrdf_load_html_response) * 1975-02-07 1977-03-31 Aginfor Ag
US3994636A (en) * 1975-03-24 1976-11-30 Arthur D. Little, Inc. Axial compliance means with radial sealing for scroll-type apparatus
US4082484A (en) * 1977-01-24 1978-04-04 Arthur D. Little, Inc. Scroll-type apparatus with fixed throw crank drive mechanism
DE2753336C3 (de) * 1977-11-30 1981-02-26 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Dichtungsanordnung zur gegenseitigen Abdichtung von konzentrisch zueinander angeordneten und in axialer Richtung relativ zueinander bewegbaren Teilen
US4192152A (en) * 1978-04-14 1980-03-11 Arthur D. Little, Inc. Scroll-type fluid displacement apparatus with peripheral drive
DE3140512A1 (de) * 1981-10-13 1983-04-21 Fa. Jos. L. Meyer, 2990 Papenburg Verdraengermaschine
KR860001681Y1 (en) * 1983-04-29 1986-07-25 Mitsubishi Electric Corp Scroll type compressor
US4564343A (en) * 1983-07-30 1986-01-14 Mitsubishi Denki Kabushiki Kaisha Scroll compressor having improved sealing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Technik-Lexikon Werkstoffe und Werkstoffprüfung Grundlagen, Band 4, Rowohlt Taschenbuch Verlag GmbH, 1971, Seite 673 *

Also Published As

Publication number Publication date
DE3861635D1 (de) 1991-02-28
EP0298315A1 (de) 1989-01-11
JPS6424192A (en) 1989-01-26
BR8803459A (pt) 1989-01-31
CH673135A5 (enrdf_load_html_response) 1990-02-15
ATE60405T1 (de) 1991-02-15
US4883413A (en) 1989-11-28

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