EP0618365A1 - Verdrängermaschine mit magnetischer Führung - Google Patents

Verdrängermaschine mit magnetischer Führung Download PDF

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Publication number
EP0618365A1
EP0618365A1 EP94400343A EP94400343A EP0618365A1 EP 0618365 A1 EP0618365 A1 EP 0618365A1 EP 94400343 A EP94400343 A EP 94400343A EP 94400343 A EP94400343 A EP 94400343A EP 0618365 A1 EP0618365 A1 EP 0618365A1
Authority
EP
European Patent Office
Prior art keywords
capsule
axis
piston
axes
symmetry
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.)
Granted
Application number
EP94400343A
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English (en)
French (fr)
Other versions
EP0618365B1 (de
Inventor
Benoit Barthod
Jean-Pierre Chicherie
Denis Perrillat-Amede
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.)
Alcatel CIT SA
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Alcatel CIT SA
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Publication of EP0618365A1 publication Critical patent/EP0618365A1/de
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Publication of EP0618365B1 publication Critical patent/EP0618365B1/de
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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • 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
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/008—Prime movers
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/22—Rotary-piston machines or pumps of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth-equivalents than the outer member

Definitions

  • the present invention relates to a volumetric machine such as a vacuum pump or a compressor.
  • the invention applies to a vacuum pump of small flow, dry, non-polluting and capable of discharging the pumped gas at atmospheric pressure.
  • Roots, claw or twin screw pumps are known, but these machines have two shafts, synchronized in rotation by lubricated gears, so they are not entirely dry.
  • Dry vane pumps are still known, but the vanes wear out quickly and cause a significant deterioration in performance, a short service life of the pump and pollution of the vacuum chamber by wear products.
  • Membrane pumps are still known, but membranes have a short service life, or piston pumps, but they have poor performance and a high level of noise and vibration.
  • the invention relates to a new type of dry primary pump which overcomes largely the problems and defects of known dry primary pumps. It is a volumetric machine with planetary and geometric hypertrochoidal movement.
  • the machine comprises a cylindrical piston, a cylindrical capsule which surrounds it and a bent shaft whose axes are parallel to those of the cylinders defining the shape of the piston and of the capsule, in rotoid connection with this piston and this capsule.
  • the cylinder defining the shape of the piston has an order of symmetry with respect to its axis equal to S p , that of the capsule an order of equal symmetry to S c ; S p and S c are chosen so that these values differ by one.
  • the geometry of the piston and of the capsule is chosen so that there is direct correspondence between these elements.
  • One of the organs, capsule or piston has a P1 profile which is identified with a curve uniformly distant from a closed hypertrochoid, presenting neither double point nor cusp, excluding hypertrochoids degenerated into hypotrochoids, epitrochoids or peritrochoids.
  • the P1 profile can also be at zero distance from such a hypertrochoid and therefore identify with it.
  • the definition of hypertrochoids is specified in French patent 2 203 421.
  • the other organ has a profile P2 which is the envelope of P1 in a relative planetary movement defined by two circles C1 and C2 of centers and respective radii (01, R1) and (02, R2), these circles C1 and C2 being respectively integral with the profiles P1 and P2 and rolling over one another without sliding by internal contact,
  • machines can be derived from machines belonging to one of the four preceding families. Indeed, one can use a profile P2 of which at least part is identified with the envelope of P1 in its movement relative to P2 and of which at least part is external to this envelope in the case of families I or II and is inside this envelope in the case of families III or IV, the different parts connecting to define a closed curve.
  • the planetary movement of such machines can be achieved, either by an internal gear with parallel axes, the wheels of which are respectively integral with the piston and the capsule and whose pitch radii are respectively equal to R1 and R2, or, if the geometry of the surfaces of the piston and the capsule which are in contact allows sufficient driving and if the fluid conveyed in the machine is sufficiently lubricating, then the gear can be eliminated and the relative planetary movement is directly imposed, during the rotary drive of the bent shaft, by the piston-capsule contact.
  • the machine has the disadvantage of not be perfectly dry, because it requires the presence of a gear for the planetary movement which must therefore be lubricated to allow lasting operation, or else the presence of a pumped lubricating fluid if the gear is removed and if the movement planetary is directly obtained by direct contact between the piston and the capsule. In certain applications where the vacuum must be very clean, this is unacceptable.
  • the object of the present invention is to propose a machine as described above, but also making it possible to dispense with lubricant in the means used to generate the planetary movement of the machine.
  • the invention thus relates to a volumetric machine comprising a cylindrical piston of axis ⁇ p , rotary and located in a cylindrical capsule of axis ⁇ c , characterized in that said piston has, in a plane perpendicular to its axis ⁇ p , a section of hypertrochoidal geometry having S p axes of symmetry, said capsule defining a hollow volume whose section by a plane perpendicular to its axis ⁇ c has a hypertrochoidal geometry having S c axes of symmetry, S p and S c differentiating d '' a unit, the axes ⁇ p and ⁇ c , parallel, being separated by a distance E, said piston being mounted, free to rotate about its axis ⁇ p , on a crank pin of axis ⁇ p secured to a shaft of axis ⁇ c supported by said capsule, said shaft being intended to be driven in rotation about its axis ⁇ c by
  • the invention also relates to a volumetric machine comprising a cylindrical piston of axis ⁇ p , located in a cylindrical capsule of axis ⁇ c , characterized in that said piston has, in a plane perpendicular to its axis ⁇ p , a section of hypertrochoidal geometry having S p axes of symmetry, said capsule defining a hollow volume whose section, by a plane perpendicular to its axis ⁇ c , has a hypertrochoidal geometry having S c axes of symmetry, S p and S c differentiating d '' a unit, the axes ⁇ p and ⁇ c , parallel, being separated by a distance E, and in that said capsule is mounted, free in rotation, around its axis ⁇ c , on a crank pin of axis ⁇ c secured to a shaft with axis ⁇ p supported by bearings in a box enclosing said capsule, said box comprising
  • FIGS 1, 2 and 3 show three possible profiles of piston and capsule according to the invention.
  • FIGS. 4 and 5 show diagrammatically in two views, a machine according to the invention with piston and capsule profiles in accordance with FIG. 1.
  • Figures 6 and 7 are two views similar to Figures 4 and 5 showing a variant.
  • Figures 8 and 9 are also two views similar to Figures 4 and 5 showing another variant.
  • FIG. 10 is a detail view showing a variant of FIGS. 8 and 9.
  • Figures 11 and 12 show, in more detail, a concrete example of machines according to the invention, still in the case of profiles according to Figure 1 and according to the variant of Figure 10.
  • Figure 12 is a section along XII- XII of figure 11.
  • Figures 13 and 14 are another embodiment of a machine according to the invention, corresponding to the profiles of Figure 1, but in which the piston is fixed and where it is the capsule which performs a planetary movement around the piston axis.
  • Figure 1 shows, in section, by a plane perpendicular to the axes ⁇ p and ⁇ c , parallel, of the piston 1 and the capsule 2, the profile of a piston and a capsule.
  • FIGs 4 and 5 we will describe a machine according to the invention. These figures are simplified and in particular do not include the suction and discharge which are shown only in Figures 11 to 14. These Figures 4 and 5, as well as Figures 6 to 9, simplified, allow to understand the operation of the machine according to the invention and in particular the production relative planetary movement: either of the piston, Figures 4 to 12, or of the capsule, Figures 13 and 14.
  • This piston is cylindrical with axis ⁇ p and it is located in a cylindrical capsule 2 with axis ⁇ c .
  • These profiles P1 and P2 are hypertrochoidal profiles.
  • the axes ⁇ p and ⁇ c are parallel and distant by a value E.
  • the piston 1 is mounted to rotate freely, about its axis ⁇ p on a crank pin 4 by means of bearings 5 and 6.
  • the crank pin 4 is integrally connected to a shaft 7 of axis ⁇ c supported by the capsule 2 by levels 8 and 9.
  • the shaft 7 is rotated about its axis ⁇ c by a motor not shown.
  • the axis ⁇ p of the pin 4 that is to say the piston 1 is rotated about the axis ⁇ c.
  • the planetary movement of the piston 1 is caused by magnetic repulsion forces by means of permanent magnets located, on the one hand, on the surface of the piston 1 and on the other hand on the internal surface of the capsule 2.
  • FIGS. 4 and 5 it is a question, both on the piston and on the capsule, of a plurality of magnets 10 and 11 respectively.
  • these magnets are substantially polarized radially and in such a way that the poles of the same name are on the surface on the piston and the capsule so as to produce repulsion forces.
  • the piston 1 and the capsule 2 define between them three chambers A, B and C which, each, during the planetary movement of the piston, increases and decreases alternately.
  • each room is equipped with a suction inlet and a discharge outlet fitted with valves.
  • Figures 6 and 7 show an example in which the permanent magnets are axially polarized in the same direction on the piston and the capsule so as to obtain repulsion forces.
  • Figures 8 and 9 show another example in which the magnets 10 and 11 are replaced by magnetized strips 12 and 13 axially magnetized. These strips could also be magnetized radially. These magnetic strips 12 and 13 can be attached to the piston 1 and the capsule 2 and be glued to their surface.
  • FIG. 10 is a partial sectional view showing a variant, not directly attaching the magnetic strips 12 and 13 to the surfaces of the piston and of the capsule, but proceeding by molding the magnetizable material containing a plastic binder.
  • the magnetic strips 12 and 13 are not directly on the surface but, for the purposes of molding, in order to form formwork, slightly below this surface; there therefore remains a thin wall 14 and 15 respectively of the piston and of the capsule separating the two magnetic strips 12 and 13.
  • Figures 11 and 12 show a more concrete machine than the previous ones with suction and discharge and in the case where the magnetic forces are created by two magnetic strips 12 and 13 which have been cast in accordance with Figure 10.
  • the piston 1 is mounted by the bearings 5 and 6 on the crank pin 4 linked to a plate 16 itself secured to the shaft 7 which supports the assembly, cantilevered, by the bearings 8 and 9 mounted in part 2A of the capsule 2 in three parts 2A, 2B and 2C.
  • the piston 1 is held by a screw 17 and a washer 18.
  • the machine comprises three independent pumping chambers A, B and C, which each pulsate like a heart and which each comprise an inlet and outlet block 19 comprising a suction inlet 20, equipped with a valve 21, and a discharge outlet 22, fitted with a valve 23.
  • the magnetic repulsive forces which angularly position the piston relative to the capsule axially generate an unstable equilibrium point is then carried out as follows: the two magnetic strips 12, 13 are offset very slightly, axially, one with respect to the other, with respect to their unstable equilibrium point, so to obtain an axial force in a determined direction which is then collected by the mounting of the prestressed bearings.
  • the piston 1, outside the magnetic strip 12 and the capsule 2 in its three parts 2A, 2B and 2C, outside the magnetic strip 13, are made of non-magnetic material, aluminum for example, so as not to disturb the magnetic fields which position the piston relative to the capsule.
  • FIGS. 13 and 14 show an example in which the piston 1 is fixed and where it is the capsule 2 which describes a planetary movement around the fixed axis ⁇ p of the fixed piston 1.
  • the forces of Magnetic repellents are created by a plurality of permanent magnets 10 and 11 radially polarized, as in Figures 4 and 5.
  • magnets axially polarized or two magnetic strips polarized axially or radially could be used.
  • the capsule 2 is mounted to rotate freely around its axis ⁇ c on the crank pin 4 linked to the shaft 7, the axis ⁇ p of which is itself coaxial with the axis ⁇ p of the fixed piston 1.
  • the shaft 7 is supported by bearings 8 and 9, mounted in a fixed box in two parts 24A and 24B.
  • the box 24A, 24B encloses the capsule 2 in a circular cylindrical housing 25 of axis ⁇ p whose dimensions are sufficient to allow the planetary movement of the capsule 2 around the axis ⁇ p of the piston with sufficient play to avoid the contact.
  • the capsule 2, housed in the box 24A-24B is open on a lateral face, and it is the part 24B of the box which encloses the capsule 2, the piston 1 being fixed to this part 24B by screws, axes 26 and 27.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Tires In General (AREA)
EP94400343A 1993-02-19 1994-02-16 Verdrängermaschine mit magnetischer Führung Expired - Lifetime EP0618365B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9301926 1993-02-19
FR9301926A FR2701737B1 (fr) 1993-02-19 1993-02-19 Machine volumétrique à guidage magnétique.

Publications (2)

Publication Number Publication Date
EP0618365A1 true EP0618365A1 (de) 1994-10-05
EP0618365B1 EP0618365B1 (de) 1997-05-07

Family

ID=9444236

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94400343A Expired - Lifetime EP0618365B1 (de) 1993-02-19 1994-02-16 Verdrängermaschine mit magnetischer Führung

Country Status (6)

Country Link
US (1) US5439357A (de)
EP (1) EP0618365B1 (de)
JP (1) JPH06249173A (de)
CA (1) CA2114601A1 (de)
DE (1) DE69403020T2 (de)
FR (1) FR2701737B1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997033412A1 (en) * 1996-03-06 1997-09-12 Bear Creek Technologies, Inc. System for interconnecting standard telephony communications equipment to internet protocol networks
DE29614108U1 (de) * 1996-08-16 1997-12-11 Klipstein Thomas Dipl Ing Rotationskolbenmaschine bzw. Rotationskolbenpumpe
US6174151B1 (en) 1998-11-17 2001-01-16 The Ohio State University Research Foundation Fluid energy transfer device
US6481975B1 (en) * 2000-03-07 2002-11-19 Motorola, Inc. Gear pump and switch reluctance motor and method for pumping fluid
MY142613A (en) * 2003-08-27 2010-12-15 Kcr Technologies Pty Ltd Rotary mechanism
KR100680775B1 (ko) * 2004-09-24 2007-02-09 주식회사 원택 로터리 엔진
RU2322587C1 (ru) * 2006-12-26 2008-04-20 Сергей Иванович Нефедов Устройство объемной машины (варианты)
EP2567069A4 (de) 2010-05-05 2014-04-16 Ener G Rotors Inc Fluidische energieübertragungsvorrichtung
US8714951B2 (en) * 2011-08-05 2014-05-06 Ener-G-Rotors, Inc. Fluid energy transfer device
ITFO20130004A1 (it) * 2013-03-29 2014-09-30 Hilaly Abdessamad El Il motore rotativo a quattro lobi
DE102014223142A1 (de) * 2014-11-13 2016-05-19 Robert Bosch Gmbh Rotationskolbenmaschine

Citations (5)

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Publication number Priority date Publication date Assignee Title
FR383332A (fr) * 1907-04-17 1908-03-05 Cooley Dev Company Machine rotative destinée à propulser un fluide ou à etre actionnée par lui
US2965039A (en) * 1957-03-31 1960-12-20 Morita Yoshinori Gear pump
US3029738A (en) * 1958-09-02 1962-04-17 Borsig Ag Control for rotary piston machines
JPS57143185A (en) * 1981-02-27 1982-09-04 Mitsubishi Electric Corp Rotary compressor
EP0504863A1 (de) * 1991-03-19 1992-09-23 IVECO FIAT S.p.A. Elektrische Pumpe zur Förderung einer Flüssigkeit, z.B. in Brennkraftmaschinen

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Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR383332A (fr) * 1907-04-17 1908-03-05 Cooley Dev Company Machine rotative destinée à propulser un fluide ou à etre actionnée par lui
US2965039A (en) * 1957-03-31 1960-12-20 Morita Yoshinori Gear pump
US3029738A (en) * 1958-09-02 1962-04-17 Borsig Ag Control for rotary piston machines
JPS57143185A (en) * 1981-02-27 1982-09-04 Mitsubishi Electric Corp Rotary compressor
EP0504863A1 (de) * 1991-03-19 1992-09-23 IVECO FIAT S.p.A. Elektrische Pumpe zur Förderung einer Flüssigkeit, z.B. in Brennkraftmaschinen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 6, no. 246 (M - 176)<1124> 4 December 1982 (1982-12-04) *

Also Published As

Publication number Publication date
FR2701737B1 (fr) 1995-04-14
DE69403020D1 (de) 1997-06-12
CA2114601A1 (en) 1994-08-02
FR2701737A1 (fr) 1994-08-26
EP0618365B1 (de) 1997-05-07
JPH06249173A (ja) 1994-09-06
DE69403020T2 (de) 1997-08-14
US5439357A (en) 1995-08-08

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