WO2008152055A9 - Compresseur ou pompe à spirale ayant des spirales en orbite - Google Patents

Compresseur ou pompe à spirale ayant des spirales en orbite Download PDF

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Publication number
WO2008152055A9
WO2008152055A9 PCT/EP2008/057278 EP2008057278W WO2008152055A9 WO 2008152055 A9 WO2008152055 A9 WO 2008152055A9 EP 2008057278 W EP2008057278 W EP 2008057278W WO 2008152055 A9 WO2008152055 A9 WO 2008152055A9
Authority
WO
WIPO (PCT)
Prior art keywords
pump
bush
stator
shaft
fixed
Prior art date
Application number
PCT/EP2008/057278
Other languages
English (en)
Other versions
WO2008152055A1 (fr
Inventor
Marco Zucchini
Andrea Lazari
Original Assignee
D V P Vacuum Technology S R L
Marco Zucchini
Andrea Lazari
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
Priority claimed from ITBO20070418 external-priority patent/ITBO20070418A1/it
Priority claimed from ITBO20080177 external-priority patent/ITBO20080177A1/it
Application filed by D V P Vacuum Technology S R L, Marco Zucchini, Andrea Lazari filed Critical D V P Vacuum Technology S R L
Publication of WO2008152055A1 publication Critical patent/WO2008152055A1/fr
Publication of WO2008152055A9 publication Critical patent/WO2008152055A9/fr

Links

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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids 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
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids 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
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids 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
    • F04C18/0223—Rotary-piston pumps specially adapted for elastic fluids 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
    • 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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C29/0057—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions for eccentric movement

Definitions

  • the invention relates to fluid machines such as so-called scroll pumps or compressors, the operating principle of which is based on variation in the volumes intercepted by at least two cup-shaped modules or stages, with the lateral cylindrical surface having a straight line as a generatrix and a spiral for example in the form of an involute of a circle as a directrix, one of the stages being fixed, while the other one is driven with an orbiting movement about a common axis of the two stages.
  • Each profile has an associated closing base and the free edge of each profile makes frictional and sealing contact with the inner surface of the base of the other profile, with an energized composite seal arranged in between.
  • the latter For the orbital movement of the moving stage, the latter is mounted with its central part, via roller bearings arranged in between and allowing freedom of axial movement, on an eccentric middle section of a shaft which is rotatably supported via other bearings by the stator of the pump and which projects from the latter for connection to a rotational motor, while with the pehmetral part the said moving stage is connected to one or more cranks with an axis parallel to that of the said shaft, which may be operated in synchronism with this shaft by positive drive means and may be situated outside the stator, as for example described in the patent DE 3,010,052, or may be operated in synchronism by the eccentric movement which the moving stage receives from the said main shaft and may be situated inside the stator or outside the latter, as for example described in the patents US 5,391 ,065 and US 5,258,046.
  • the invention intends to overcome these and other drawbacks of the known art, with the solution as claimed in the accompanying Claim 1 and subsequent dependent claims, which may be summarised as follows.
  • the internal orbital movement stage of the pump is fixed to the end of a drive shaft which passes through at least one of the stages forming the stator of the said pump and which projects from the latter with a section of adequate length, this shaft section being rotatably supported, via bearings with freedom of axial movement, by the internal through-seat with suitable eccentricity of a bush which is rotatably supported via bearings by the axially hollow hub integral with the base of the fixed stage passed through by the shaft in question.
  • This bush projects by a suitable amount from the stator of the pump and is supported rotatably not only by the bearings inside the stator, but also by external bearings supported by support means integral with the said stator so as to leave free a sufficient lateral part of the outer middle section of the bush in question.
  • the section of the said main shaft which projects from the outer end of the said bush is connected to connecting-rod means which with their head co-operate with crank means rotatably supported by the adjacent stator of the pump.
  • the rotational movement is imparted onto the outer middle section of the said bush by means of a drive system for example of the belt and pulley type, with the arrangement of the rotational motor parallel to the axis of the pump.
  • the rotation of this bush about its axis, the eccentric supporting of the main drive shaft of the pump by the latter and the connection of this shaft to the said connecting-rod and crank means produce the orbital rotation of this shaft together with the middle stage of the pump in accordance with the law necessary for correct operation of the said scroll pump.
  • the shaft of the said motor may have, keyed thereon, a secondary fan which produces an air flow with a suitable flowrate and pressure and which, by means of a special casing, which among other things safely conceals all the outer moving parts of the pump, is forced to flow over and adequately cool at least the body of the said pump and preferably also the outer surface of the said motor.
  • Fig. 1 is a top plan view of the motor/pump unit, with the pump cross-sectioned along an ideal plane which contains the axes of rotation and revolution of the main components of the said pump;
  • Fig. 2 shows an elevation view of the motor/pump unit from the front side indicated by the arrow K in Figure 1.
  • FIG. 1 , 1 and 1 ' denote the two cup-shaped bodies or shells which form the stator of the pump and which are fixed against each other by perimetral means (not shown here) and with seals 2 arranged in between.
  • the inner surfaces of the bases of the bodies 1 , 1' usually support integrally the respective spirals for example in the form of an involute of a circle 201 , 201 ' which co-operate with the corresponding circle involute spirals 103, 103' of the orbital-movement middle stage 3 so as to form the variable-volume chambers of the pump which are closed frontally by the sealed co-operation, on one side, of the spirals 103, 103' of the moving stage 3 with the flat inner surfaces 301 , 301 ' of the bases of the shells 1 , 1 ' and, on the other side, by the sealed co-operation of the stator spirals 201 , 201 ' with the flat sides 203, 203' of the orbiting stage 3.
  • both the shells 1 , 1' support internally, integrally and in an axial position, respective hubs 401 , 401 ' provided on the free edges with seats for containing composite seals 5' and 5" of the same type as those 5 described above for the spirals of the pump, via which they co-operate so as to form a frontal seal with the opposite sides 203 and 203' of the flat body of the moving stage 3 of the said pump.
  • the hubs 401 , 401 ' define with the middle disk 3, chambers of sufficient depth for containing means 7, 107 and 8 for axially fixing and keying to the central enlarged part 403 of the said disk 3 the flanged end 109 of the cylindrical shaft 9 for rotation of the pump which, via roller bearings 10 arranged in between and allowing it freedom of axial movement, passes through the suitably eccentric inner seat 11 of the bush 12 which with its outer surface is rotatably mounted, via the bearing 13 for example of the roller type, inside the hub 401 '.
  • the bush 12 projects by a suitable amount from the stator shell 1 ' and from the said corresponding hub 401' and terminates with a tapered section 112 which internally seats one of the said roller bearings 10 for supporting the shaft 9 and which externally is in turn rotatably supported, via the bearing 14, for example of the ball type, by a ring 29 which has an opening in the form of a radial incision 30 and is provided with tangential tightening means 31 (Fig. 2), by means of which this ring may be fixed onto the outer race of the said bearing 14 and may if necessary be easily disassembled from the latter, for the purposes indicated further below.
  • the ring 29 may be fixed with respective screws 32 on three projections 33 which are formed for example integrally with the shell 1 ', are angularly spaced at 120 from each other and on which the bearings 26 are mounted, said bearings supporting the bottom end of the cranks 25 which with their heads co-operate with the bearings 24 of a connecting-rod star or cross piece 22 which by means of the cotter 23 and the axial fixing dowel 123 is keyed onto the end of the shaft 9 which projects from the said bush 12.
  • the middle part of the bush 12 is designed externally so as to form a pulley 34 of suitable diameter, which is coaxial with the bearings 13, 14 and on which a belt 35 is driven, said belt obtaining its movement from a corresponding pulley 134, for example with a diameter smaller than that of the previous pulley 34 and keyed onto the shaft of a motor 36, for example of the electric or any other suitable type, with suitable characteristics, which is situated on the side of the pump in question, parallel to the latter, and which in the example in question is flanged onto an extension 601 ' of the bottom wall of the shell 1 '.
  • 135 denotes a roller mounted adjustably on the said wall 601 ' so as to ensure the correct degree of tensioning for the return section of the said belt 35.
  • the bush 12 may be provided with an eccentric mass 212 and, in opposition to this, may be provided with a segment of weight-reducing holes 37, in order to provide effective dynamic balancing of the entire moving part of the pump, without the need for providing special-purpose counterweights.
  • one or more holes 27 may be provided for example on the bush 12 and/or in another position useful for keeping at least the internal chamber of the hub 401' situated ahead of the inner bearings 13 and 10 in free communication with the exterior, both in order to discharge freely outside any products resulting from wear of these bearings and in order to ensure proper cooling of these same components and the central part of the pump.
  • the box 41 is also provided with filter means for connection within a circuit to the intake mouth A of the pump and means with the usual one-way valve are provided for connection to the discharge mouth B of the said pump which may be, for example, intercepted by a specially shaped aperture 42 provided on the central disk
  • Reference numeral 801 denotes feet for being able to fix the motor and pump unit, as described, to any support surface, these feet being integral with the said wall 601' and the outer surfaces of the
  • stator bodies 1 , 1 ' of the pump 50 stator bodies 1 , 1 ' of the pump.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

L'invention propose un compresseur ou une pompe à spirale ayant des spirales en orbite, qui comporte deux étages fixes (1, 1') et un étage interne ou intermédiaire (3) se déplaçant avec un mouvement d'orbite. Ces étages sont pourvus de systèmes associés ayant des spirales, par exemple sous la forme d'une développante d'un cercle (201, 201', 103, 103'). Ledit étage interne (3) est fixé à un arbre d'entraînement (9) qui passe à travers une partie de stator (1') de la pompe et qui est porté à rotation par l'intermédiaire de paliers (10) avec une liberté de mouvement axial grâce au siège interne, excentrique de façon appropriée (11), d'une douille (12) qui, avec une section de sa longueur, est portée à rotation par l'intermédiaire d'au moins un palier (13) par un moyeu interne axial de la partie de stator adjacente (1') à partir de laquelle ladite douille s'étend avec une grande section qui est partiellement portée à rotation par l'intermédiaire d'au moins un palier supplémentaire (14) disposé entre celles-ci par une bague (29) fixée sur des supports externes (33) d'un seul bloc avec ledit stator (1') de la pompe. L'arbre d'entraînement (9) de la pompe se projette à partir de cette douille (12) de façon à recevoir, clavetés sur celui-ci, des moyens de bielle (22) qui, avec la partie la plus à l'extérieur, coopèrent avec des moyens de manivelle (25) portés à rotation par la surface externe du stator (1') de ladite pompe et conçus pour tourner de façon synchrone avec ledit arbre (9) qui est conçu pour effectuer le mouvement de rotation en orbite conformément à la loi nécessaire pour un fonctionnement correct de la pompe ou du compresseur par des moyens de mouvement (36) qui transmettent un mouvement de rotation à la vitesse correcte à la section externe de ladite douille (12).
PCT/EP2008/057278 2007-06-14 2008-06-11 Compresseur ou pompe à spirale ayant des spirales en orbite WO2008152055A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ITBO2007A000418 2007-06-14
ITBO20070418 ITBO20070418A1 (it) 2007-06-14 2007-06-14 Pompa o compressore a spirali orbitanti, di tipo scroll.
ITBO2008A000177 2008-03-20
ITBO20080177 ITBO20080177A1 (it) 2008-03-20 2008-03-20 Pompa o compressore a spirali orbitanti, di tipo scroll.

Publications (2)

Publication Number Publication Date
WO2008152055A1 WO2008152055A1 (fr) 2008-12-18
WO2008152055A9 true WO2008152055A9 (fr) 2009-05-28

Family

ID=39776430

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/057278 WO2008152055A1 (fr) 2007-06-14 2008-06-11 Compresseur ou pompe à spirale ayant des spirales en orbite

Country Status (1)

Country Link
WO (1) WO2008152055A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104033357B (zh) * 2013-03-06 2017-05-10 科沃斯机器人股份有限公司 真空气泵及擦玻璃装置
KR102051095B1 (ko) * 2013-06-10 2019-12-02 엘지전자 주식회사 스크롤 압축기

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4192152A (en) * 1978-04-14 1980-03-11 Arthur D. Little, Inc. Scroll-type fluid displacement apparatus with peripheral drive
JPS57203801A (en) * 1981-06-09 1982-12-14 Nippon Denso Co Ltd Scroll type hydraulic machine
DE3810052A1 (de) * 1987-04-08 1988-10-20 Volkswagen Ag Kuehlanordnung
JPH02140482A (ja) * 1988-11-22 1990-05-30 Sanden Corp うず巻き体流体装置
JP2008150976A (ja) * 2006-12-15 2008-07-03 A & A Kenkyusho:Kk スクロール流体機械

Also Published As

Publication number Publication date
WO2008152055A1 (fr) 2008-12-18

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