EP0597804B1 - Machine de déplacement de fluide du type à spirale' - Google Patents

Machine de déplacement de fluide du type à spirale' Download PDF

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Publication number
EP0597804B1
EP0597804B1 EP93810745A EP93810745A EP0597804B1 EP 0597804 B1 EP0597804 B1 EP 0597804B1 EP 93810745 A EP93810745 A EP 93810745A EP 93810745 A EP93810745 A EP 93810745A EP 0597804 B1 EP0597804 B1 EP 0597804B1
Authority
EP
European Patent Office
Prior art keywords
groove
spiral
sealing strip
delivery space
displacement
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
EP93810745A
Other languages
German (de)
English (en)
Other versions
EP0597804A1 (fr
Inventor
Gregor Jetzer
Roland Kolb
Fritz Spinnler
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.)
Aginfor AG
Original Assignee
Aginfor AG fuer industrielle Forschung
Aginfor 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 Aginfor AG fuer industrielle Forschung, Aginfor AG filed Critical Aginfor AG fuer industrielle Forschung
Publication of EP0597804A1 publication Critical patent/EP0597804A1/fr
Application granted granted Critical
Publication of EP0597804B1 publication Critical patent/EP0597804B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F04C27/005—Axial sealings for working fluid

Definitions

  • the invention relates to a displacement machine for compressible media with at least one spiral-shaped delivery chamber arranged in a fixed housing and a spiral displacement body assigned to the delivery chamber; the end faces of the displacement body which adjoin a side wall of the delivery space are provided with a groove in which a sealing strip made of elastic and slidable material lies.
  • Displacement machines of the spiral type are known from DE-C-26 03 462.
  • a compressor constructed according to this principle is characterized by an almost pulsation-free conveyance of the gaseous working medium, for example consisting of air or an air-fuel mixture, and could therefore also be used with advantage for charging purposes of internal combustion engines.
  • the gaseous working medium for example consisting of air or an air-fuel mixture
  • a plurality of approximately crescent-shaped working spaces are trapped along the displacement chamber between the spiral-shaped displacement body and the two peripheral walls of the displacement chamber, which work spaces move from the inlet through the displacement chamber to the outlet.
  • their volume decreases increasingly with a corresponding increase in the working fluid pressure.
  • the seal between the working spaces above and below the displacer is of crucial importance.
  • 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.
  • the sealing strip is underlaid by a force-exerting spring element.
  • the groove ensures perfect lateral guidance of the sealing strip inserted therein.
  • the sealing strip is positioned in the longitudinal direction of the groove through the ends of the groove worked into the spiral walls. The positioning carried out in this way satisfies the loads which occur during operation on the sealing strips inserted in the housings.
  • the sealing strip is sufficiently "caught".
  • acceleration forces occur during operation of the spiral machine, which are caused by the circular movement of the displacer.
  • These loads have a circular direction of action on the sealing strips; i.e. relative to the sealing strip, the inertial forces do not act on the sealing strip in one direction, but rather in the plane of the sealing strip groove. Accordingly, the reaction forces on the sealing strips also change their direction.
  • the transverse component can be applied well through the side walls of the groove; the longitudinal component of the reaction forces moves the sealing strip back and forth in the groove, the ends of the groove forming the stop for the relative movement.
  • reaction forces described increase, in particular the longitudinal guide of the sealing strips described and corresponding to the prior art no longer satisfies the reaction forces that occur.
  • the constantly changing longitudinal component of the on the reaction force acting on the sealing strip leads to a back and forth movement of the sealing strip in the groove, which can result in increased wear of the sealing strip or the walls of the groove.
  • the invention is therefore based on the object of designing the groove in the case of a rotary piston displacement machine of the type mentioned at the outset with regard to better longitudinal guidance of the sealing strip and a reduction in the signs of wear.
  • the advantage of the invention consists on the one hand in the effectiveness of the new groove shape and on the other hand in the simplicity of its manufacture. This effectiveness is given by the fact that the sealing strip is originally manufactured as a straight component and, after being inserted, its elasticity means that it is held in the longitudinal direction of the sealing strip groove.
  • sealing strip groove is formed with the meandering course only at the outlet end.
  • the radial space requirement can be kept within limits.
  • the disk-shaped displacer of the machine is designated by 1.
  • Arranged on both sides of the pane 2 are two spirally extending strips which are offset by 180 ° to one another. It is the strips 3a, 3b, which are held vertically on the disc 2.
  • the spirals themselves are formed from a plurality of circular arcs adjoining one another.
  • the housing is composed of two halves 7a, 7b. 11a and 11b denote the two delivery spaces, each offset by 180 °, which are incorporated into the two housing halves to form the webs 45, 46 in the manner of a spiral slot. They each run from an inlet 12a, 12b arranged on the outer circumference of the spiral in the housing to an outlet 13 provided in the interior of the housing and common to both delivery spaces. They have essentially parallel cylinder walls which are arranged at a constant distance from one another and which, like the displacement bodies of the disk 2 comprise a spiral of 360 °.
  • the displacement bodies 3a, 3b engage, the curvature of which is dimensioned such that the strips engage the inner and outer cylinder walls of the housing on several, for example almost touch two places at a time.
  • Seals 9 are inserted into corresponding grooves 30 on the free end faces of the strips 3a, 3b and the webs 45, 46. With them, the working rooms against the side walls of the housing respectively. sealed against the displacement disc.
  • the drive and the guide of the displacer 1 are provided by the two eccentric arrangements 23, 24 and. 26, 27.
  • the main shaft is supported in a roller bearing 17 and a slide bearing 18. At its end protruding from the housing half 7b, the shaft is provided with a V-belt pulley 19 for the drive.
  • Counterweights 20 are arranged on the shaft to compensate for the inertial forces arising when the rotor is eccentrically driven.
  • the guide shaft 27 is mounted within the housing half 7b.
  • the two eccentric arrangements are synchronized with precise angles. This is done via a toothed belt drive 16.
  • the double eccentric drive ensures that all points of the displacement disk and thus also all points of the two strips 3a, 3b perform a circular displacement movement.
  • crescent-shaped workrooms enclosing the working medium result on both sides of the strips, which are displaced by the delivery chambers during the drive of the displacement disk in the direction of the outlet. The volumes of these working spaces decrease and the pressure of the working fluid is increased accordingly.
  • the delivery spaces are sealed off from the housing halves by means of the sealing strips 9 mentioned. These are inserted in the grooves 30 provided on the end faces of the strips 3a, 3b and the webs 45, 46.
  • the grooves, not shown in the webs 45, 46 of the delivery spaces run approximately parallel to the spiral walls.
  • the groove strips 31 clearly guide the sealing strips in the radial direction.
  • the guidance in the tangential direction is essentially only ensured by the ends 32 (as shown in FIG. 2) of the sealing strip grooves.
  • the co-absorbing sealing strip groove 30 of the displacer is no longer carried out parallel to the walls of the spiral strips 3a, 3b, but in a meandering manner.
  • the effect of the new measure consists in the tangential guidance resp. in damping the tangential movement of the sealing strips.
  • the sealing strip groove is usually machined into the front of the displacement wall by a machining process.
  • the displacer is turned past the milling tool, the milling tool only carries out the radial infeed movement necessary to generate the spiral shape.
  • the sealing strip groove according to the invention is produced, the radial feed movement of the milling tool must also be superimposed on a radial back and forth movement, which is not a problem with the NC-controlled processing machines that are common today.
  • sealing strips are also easy to insert into the sealing strip groove. Since their meandering course is only a relatively small greatest distance from the center line of the groove, the sealing strip can be easily inserted into the groove according to the invention.
  • the meandering course of the sealing strip groove is limited in the case shown to the inner part of the spiral strip 3a, 3b, which extends in the conveying direction and extends over approximately 150 ° to 180 °.
  • the meandering course of the sealing strip requires a larger radial space; the spiral wall of the displacer must be widened. A widening of the spiral walls of the displacer over its entire length results in a radial enlargement of the spiral machine, if one does not want to accept any reduction in the conveying capacity.
  • the restriction of the meandering shape to the exit area of the spiral therefore has the consequence that the radial dimension of the spiral machine is not increased; the thickening of the spiral strips occurs only in the area with a meandering sealing strip groove, and is directed in the radial direction against the inside of the machine. Nevertheless, the safe operation of the sealing strip is guaranteed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Claims (2)

  1. Machine de déplacement pour des milieux compressibles avec au moins une chambre de transport (11a, 11b) en forme de spirale disposée dans une carcasse (7a, 7b) fixe et un corps de déplacement (1-4) en forme de spirale associé à la chambre de transport, qui est fixé sur un rotor (1) en forme de disque pouvant être entraîné de manière excentrique par rapport à la carcasse de telle façon que pendant le fonctionnement chacun de ses points décrive un mouvement circulaire limité par les flancs de la chambre de transport, et dont la courbure par rapport à celle de la chambre de transport est dimensionnée de telle façon qu'il vienne presqu'en contact avec les flancs intérieurs et extérieurs de la chambre de transport sur au moins une ligne d'étanchéité se déplaçant continuellement pendant le fonctionnement, les faces d'extremité du corps de déplacement se raccordant à une paroi latérale de la chambre de transport (11a, 11b) étant pourvues d'une rainure (30) dans laquelle est placée une bande d'étanchéité (9) constituée par une matière élastique et glissante, caractérisée en ce que
    - la rainure (30), qui reçoit la bande d'étanchéité (9) nécessaire pour réaliser l'étanchéité de la chambre de transport en direction axiale, présente en partie un parcours continu et en partie un parcours sinueux; en ce que
    - la paroi en forme de spirale du corps de déplacement (1-4) est pourvue d'une face d'extrémité plus large dans la région où la rainure (30) présente un parcours sinueux, que dans la région où la rainure (30) présente un parcours direct; et en ce que
    - la bande d'étanchéité élastique (9) est fabriquée en une pièce droite, non courbée, avant son placement dans la rainure.
  2. Machine de déplacement suivant la revendication 1, caractérisée en ce que le corps de déplacement en forme de spirale de la machine effectue le transport depuis une entrée (12a, 12b) située radialement à l'extérieur jusqu'à une sortie (13) située radialement à l'intérieur, et en ce que le parcours sinueux de la rainure de bande d'étanchéité (30) est limité à la partie du corps de transport (1-4) s'étendant sur environ 150° du côté de la sortie, située radialement à l'intérieur, en regardant dans le sens du transport.
EP93810745A 1992-11-07 1993-10-21 Machine de déplacement de fluide du type à spirale' Expired - Lifetime EP0597804B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4237663 1992-11-07
DE4237663 1992-11-07

Publications (2)

Publication Number Publication Date
EP0597804A1 EP0597804A1 (fr) 1994-05-18
EP0597804B1 true EP0597804B1 (fr) 1995-05-10

Family

ID=6472358

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93810745A Expired - Lifetime EP0597804B1 (fr) 1992-11-07 1993-10-21 Machine de déplacement de fluide du type à spirale'

Country Status (3)

Country Link
US (1) US5362217A (fr)
EP (1) EP0597804B1 (fr)
DE (1) DE59300185D1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09184493A (ja) * 1995-12-28 1997-07-15 Anest Iwata Corp スクロール流体機械
US6126422A (en) * 1997-10-24 2000-10-03 American Standard Inc. Tip seal for scroll type compressor and manufacturing method therefor
EP3617511B1 (fr) * 2019-10-07 2021-12-08 Pfeiffer Vacuum Gmbh Pompes à spirales et procédé de fabrication pour des telles pompes
JP7220692B2 (ja) 2019-10-07 2023-02-10 プファイファー・ヴァキューム・ゲーエムベーハー 真空ポンプ、スクロールポンプ及びその製造方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH586348A5 (fr) * 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
CH666519A5 (de) * 1984-09-13 1988-07-29 Bbc Brown Boveri & Cie Rotationskolben-verdraengungsarbeitsmaschine.
JPH0756272B2 (ja) * 1985-11-15 1995-06-14 ダイキン工業株式会社 スクロール形流体機械
JP2550549B2 (ja) * 1987-01-12 1996-11-06 ダイキン工業株式会社 スクロ−ル形流体機械
JPS63136283U (fr) * 1987-02-27 1988-09-07
CH673135A5 (fr) * 1987-07-10 1990-02-15 Bbc Brown Boveri & Cie
DE3827736C2 (de) * 1987-08-26 1996-06-05 Volkswagen Ag Spiralverdrängermaschine
JPH01187389A (ja) * 1988-01-19 1989-07-26 Sanyo Electric Co Ltd スクロール圧縮機のシール装置
JPH029975A (ja) * 1988-06-27 1990-01-12 Toshiba Corp スクロール型圧縮機
JPH0696961B2 (ja) * 1989-06-09 1994-11-30 岩田塗装機工業株式会社 スクロール流体機械
US5105634A (en) * 1990-10-29 1992-04-21 American Standard Inc. Scroll apparatus having a modified tip seal groove

Also Published As

Publication number Publication date
EP0597804A1 (fr) 1994-05-18
DE59300185D1 (de) 1995-06-14
US5362217A (en) 1994-11-08

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