EP0547491A1 - 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
EP0547491A1
EP0547491A1 EP92120962A EP92120962A EP0547491A1 EP 0547491 A1 EP0547491 A1 EP 0547491A1 EP 92120962 A EP92120962 A EP 92120962A EP 92120962 A EP92120962 A EP 92120962A EP 0547491 A1 EP0547491 A1 EP 0547491A1
Authority
EP
European Patent Office
Prior art keywords
disc
guide
spiral
disk
eccentric arrangement
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.)
Withdrawn
Application number
EP92120962A
Other languages
German (de)
English (en)
Inventor
Gregor Jetzer
Roland Kolb
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.)
ABB Asea Brown Boveri Ltd
ABB AB
Original Assignee
ABB Asea Brown Boveri Ltd
Asea Brown Boveri AB
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 ABB Asea Brown Boveri Ltd, Asea Brown Boveri AB filed Critical ABB Asea Brown Boveri Ltd
Publication of EP0547491A1 publication Critical patent/EP0547491A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F01C1/0207—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 both members having co-operating elements in spiral form
    • F01C1/0246—Details concerning the involute wraps or their base, e.g. geometry
    • 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
    • F01C1/0207—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 both members having co-operating elements in spiral form
    • F01C1/0215—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 both members having co-operating elements in spiral form where only one member is moving
    • F01C1/0223—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 both members having co-operating elements in spiral form where only one member is moving with symmetrical double wraps

Definitions

  • the invention relates to the displacer body of a displacer machine for compressible media, which machine has a plurality of spiral-shaped conveying spaces arranged in a fixed housing, the displacer body assigned to the conveying spaces essentially consisting of a disk with spiral strips arranged vertically on both sides, whereby to guide the displacer body opposite the housing is provided with a second eccentric arrangement spaced apart from a first eccentric arrangement, and wherein the guide eye of the second guide eccentric arrangement is connected to the disk via a rib such that the guide eye lies at least approximately in the tangential extension of the inlet-side end of the associated spiral bar.
  • Displacement machines of the spiral type are known, for example, 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, which consists, for example, 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 which consists, for example, of air or an air / fuel mixture, and could therefore also be used with advantage for charging purposes of internal combustion engines.
  • a machine of the type mentioned at the outset is known from EP-A-0 321 781.
  • a guide shaft of the second eccentric arrangement mounted in the housing is positively connected to the drive shaft via a gear, the gear being formed, for example, by a toothed belt drive.
  • the guide eye of the second guide eccentric arrangement is connected to the disk of the rotor via a tangentially rigid and radially flexible rib.
  • the invention is therefore based on the object of providing a measure , which facilitates the mechanical processing of the guide eye.
  • the object is achieved in that the guide eye is connected to the disk via a second reinforcing rib.
  • the rotor of the machine is designated as a whole by 1.
  • Arranged on both sides of the disk 2 are two, displaced, mutually offset by 180 °, spirally extending bodies. These are strips 3a, 3b which are held vertically on the pane 2.
  • the spirals themselves are formed from a plurality of circular arcs adjoining one another. 4 with the hub is designated, via which the disk 2 is seated on an eccentric disk 23 (FIG. 2) of the main shaft 24.
  • the guide eye 5 of the guide eccentric arrangement is connected to the rotor via a bow-shaped rib 21.
  • the guide eye lies at least approximately in the tangential extension of the inlet-side end of the spiral bar 3a.
  • a machine mentioned at the outset known from EP-A-0 321 781, has a number of discontinuities in the radial extent of the central disk in the displacer body at the ends of the spirals on the inlet side, corresponding to the number of nested spirals.
  • the discontinuity is increased in the axial direction by the spiral strips.
  • the displacement body is made of a commercially available material with a coefficient of thermal expansion greater than zero, this temperature distribution creates tensile stresses in the outer area of the disk and compressive stresses in the hub area.
  • the geometric discontinuities mentioned and the temperature profile result in a stress concentration in the inlet area of the pane and thus an increased material stress.
  • the displacement body is therefore preferably made of a light metal alloy, for example magnesium.
  • Such alloys have quite good strength values at room temperature; however, these good values drop rapidly at higher temperatures when it comes to commercially available alloys without costly additives.
  • the disc 2 - apart from the radially protruding eye 5 - closes radially with the strips 3a, 3b.
  • the disk has at least one in the radial direction in the area of the inlets 12a, 12b Half of the housing must penetrate.
  • the disk 2 is provided with circular-arc-shaped recesses 48a, 48b. These recesses cooperate on the occasion of the machine operation to form a sealing line with correspondingly formed shoulders on the fixed webs 45 and 46.
  • the forward edge of the pane is now connected to the guide eye 5 via a second reinforcing rib 50.
  • This rib 50 is shaped in such a way that it forms a stiffening bridge, which fixes the guide eye in its position and thus makes additional clamps unnecessary for its processing.
  • the reinforcement rib along the dashed line 51 is removed as the last machining operation.
  • This type of support via an arcuate rib 50 is also important because the surface of the rib 21 does not have to be machined in the case of die-cast production. The non-porous cast skin remains intact.
  • the element 50 is tangentially more elastic than the rib 21 with its connection to the displacer 1. As a result, the rib 21 is not overstressed in the cooling process following the casting. In the case of a tangentially stiff auxiliary support 50, the rib 21 would be stretched because the displacer cools more slowly than the ribs 21 and 50.
  • the housing is composed of two halves 7a, 7b.
  • 11a and 11b denote the two delivery spaces, each offset by 180 °, which are worked into the two housing halves 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 inlet which is provided in the housing interior and is common to both delivery spaces Outlet 13.
  • They have essentially parallel cylinder walls arranged at a constant distance from one another, which, like the displacement bodies of disk 2, comprise a spiral of 360 °. Between these cylinder walls, the displacement bodies 3a, 3b engage, the curvature of which is dimensioned such that the strips almost touch the inner and outer cylinder walls of the housing at several, for example at two points each.
  • seals 9 are inserted in corresponding grooves. 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 rotor 1 are provided by the two spaced-apart eccentric arrangements 23, 24 and. 26, 27.
  • the main shaft 24 is provided at its end protruding from the housing half 7b with a V-belt pulley 19 for the drive.
  • 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 rotor 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 rotor disk in the direction of the outlet.
  • the volumes of these working spaces are reduced and the pressure of the working fluid is increased accordingly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
EP92120962A 1991-12-16 1992-12-09 Machine de déplacement de fluide du type à spirale Withdrawn EP0547491A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3715/91 1991-12-16
CH371591 1991-12-16

Publications (1)

Publication Number Publication Date
EP0547491A1 true EP0547491A1 (fr) 1993-06-23

Family

ID=4261951

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92120962A Withdrawn EP0547491A1 (fr) 1991-12-16 1992-12-09 Machine de déplacement de fluide du type à spirale

Country Status (2)

Country Link
EP (1) EP0547491A1 (fr)
JP (1) JPH05248377A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1643079A1 (fr) * 2004-09-29 2006-04-05 Anest Iwata Corporation Volute à mouvement orbital d'une machine à volutes
EP2280148A4 (fr) * 2008-04-07 2015-03-18 Mitsubishi Electric Corp Machine à fluide à volutes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0284774A1 (fr) * 1987-03-24 1988-10-05 BBC Brown Boveri AG Machine à déplacement du type à spirale
DE3827736A1 (de) * 1987-08-26 1989-03-09 Volkswagen Ag Spiralverdraengermaschine
EP0321781A1 (fr) * 1987-12-21 1989-06-28 BBC Brown Boveri AG Machine de déplacement de fluide du type à spirale

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0284774A1 (fr) * 1987-03-24 1988-10-05 BBC Brown Boveri AG Machine à déplacement du type à spirale
DE3827736A1 (de) * 1987-08-26 1989-03-09 Volkswagen Ag Spiralverdraengermaschine
EP0321781A1 (fr) * 1987-12-21 1989-06-28 BBC Brown Boveri AG Machine de déplacement de fluide du type à spirale

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1643079A1 (fr) * 2004-09-29 2006-04-05 Anest Iwata Corporation Volute à mouvement orbital d'une machine à volutes
EP2280148A4 (fr) * 2008-04-07 2015-03-18 Mitsubishi Electric Corp Machine à fluide à volutes

Also Published As

Publication number Publication date
JPH05248377A (ja) 1993-09-24

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19931224