EP0081659B1 - Groupe de pompe entraîné par un moteur électrique - Google Patents

Groupe de pompe entraîné par un moteur électrique Download PDF

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Publication number
EP0081659B1
EP0081659B1 EP82109766A EP82109766A EP0081659B1 EP 0081659 B1 EP0081659 B1 EP 0081659B1 EP 82109766 A EP82109766 A EP 82109766A EP 82109766 A EP82109766 A EP 82109766A EP 0081659 B1 EP0081659 B1 EP 0081659B1
Authority
EP
European Patent Office
Prior art keywords
electric motor
interior
pumping unit
unit according
housing
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
Application number
EP82109766A
Other languages
German (de)
English (en)
Other versions
EP0081659A1 (fr
Inventor
Achill Kessler
Helmut Dipl.-Ing. Rembold
Manfred Ruoff
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.)
OFFERTA DI LICENZA AL PUBBLICO
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0081659A1 publication Critical patent/EP0081659A1/fr
Application granted granted Critical
Publication of EP0081659B1 publication Critical patent/EP0081659B1/fr
Expired 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/06—Silencing
    • 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
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/008—Enclosed motor pump units
    • 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
    • F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
    • F04C15/0049—Equalization of pressure pulses

Definitions

  • the invention is based on a pump unit according to the preamble of the main claim.
  • a pump unit is already known, in which the medium channels for supplying and discharging the pressure medium run in two connecting pieces arranged on the outside of the pump housing.
  • the pump unit When operating this pump unit, it has been shown that - especially when a gaseous pressure medium such as air is used - the flow noises occurring during operation, but also the motor noises, are perceived as very disruptive. This is particularly true when the known pump unit is fastened in a motor vehicle is and should be used to actuate a central locking system.
  • the airborne and structure-borne noise generated by the pumping unit are introduced without damping into the body of the motor vehicle, which even serves as a soundboard.
  • a space in which an electric drive motor for a vane compressor is accommodated is flowed through by the sucked-in air, so that a certain cooling of the drive motor is achieved.
  • the engine compartment is connected to the working chamber of the compressor via a medium channel.
  • a cutting disc to be regarded as an adapter part is not provided with an integrated chamber which can be used as a damping means.
  • the unit according to the invention with the characterizing features of the main claim has the advantage that the first-mentioned silencing chamber is followed by a second, anyway existing silencing chamber and both chambers must be forced to flow through by the pressure medium during operation of the pump unit. As a result, the flow noise mentioned at the outset is attenuated even further, without the need for additional equipment that increases the weight or the volume of the pump unit.
  • a pump unit which consists essentially of a vane pump 1 and an electric motor 2.
  • the actual vane pump consists of a lifting ring 3, in which a cylindrical housing recess 4 is arranged eccentrically.
  • the housing recess 4 is axially delimited by two side plates 5, 6, the outer diameter of which corresponds to the outer diameter of the cam ring 3.
  • the cam ring 3 and side plates 5, 6 are secured against displacement by pins 7 with one another.
  • a rotor 8 is located in the housing recess 4 concentrically to the outer contour of the vane pump, in the radially arranged slots 9 of which vanes 10 are guided in a tight and sliding manner.
  • the outer edges of the blades 10 touch the cylindrical inner wall of the housing recess 4 and divide the approximately crescent-shaped working space formed between the outer surface of the rotor 8 and the wall of the housing recess 4 into individual cells.
  • the rotor is guided on a pump shaft 11, which in turn is held in bearing bores arranged concentrically in the side plates 5, 6.
  • the vane pump which is axially delimited by the side plates 5, 6, is covered from above with a protective cover 13 and is screwed onto a flange 14 of an essentially cylindrical adapter part 15 by means of three countersunk screws 12.
  • the adapter part 15 is essentially tubular and has a flat end wall 16 near its end facing away from the flange 14.
  • the end wall 16 is seated flat on a faceplate-like end cover 17 of the electric motor 2 and is fastened there by means of cylinder head screws 18.
  • the adapter part is adjusted by the part of its cylindrical wall which protrudes beyond the end wall 16 on the side facing away from the vane pump 1 and bears against the cylindrical outer surface of the housing of the electric motor 2.
  • the cam ring 3 and the side plates 5, 6 are made of plastic, while the protective cover 13 and the adapter part 15 can be made of aluminum. Of course, these parts can also be made of plastic.
  • Medium areas 22, 23 are in a manner known per se - and therefore only indicated by dash-dotted lines - in areas near the point at which the outer surface of the rotor 8 and the cylindrical inner surface of the housing recess 4fast touch ) arranged for supply and discharge of the print medium.
  • the medium channel 22 opens into the interior as indicated in FIGS. 1 and 3 19 of the adapter part 15.
  • the other medium channel 23 is covered by a projection 25 radially inward in the plane of the flange 14.
  • the projection 25 in turn carries a connecting piece 26 in which the other medium channel 23 continues. As can be seen in FIG. 3, the connecting piece 26 pierces the cylindrical wall of the adapter part 15 to the outside.
  • the closed interior 19 of the adapter part 15 is connected via a through opening 24, the flow cross section of which is approximately the same as that of the medium channel 22, to the interior of the housing of the electric motor 2, which is not shown in the drawing because it is known per se.
  • the passage opening 24 can also be designed as a throttle point in special exemplary embodiments.
  • the passage opening 24 is provided on the side facing the electric motor 2 with an extension 27, which is covered by a filter plate 28 which is preferably designed as a wire mesh.
  • the interior of the electric motor 2 is connected to the outside of the electric motor via at least one opening 29 arranged in its housing wall, which is arranged in an area facing away from the end cover 17.
  • the breakthrough can also be covered with an open-pore foam layer, not shown in the drawing, which acts as a sound-absorbing element.
  • a hose fitting 30 made of rubber or similarly damping material is pushed onto the connecting piece 26, in which the medium channel 23 extends further.
  • the medium channel 23 is connected to the control chamber of an approximately membrane-operated pressure switch 32 via a T-branch 31 of the hose fitting 30.
  • the pressure switch controls, possibly in conjunction with an electronic control circuit which is arranged on a circuit board 33, the function of the electric motor 2.
  • an insert part 35 containing a throttle point 34 is arranged in the line leading to the pressure switch 32 in the T branch of the hose fitting.
  • the throttle point can also be molded directly into the line leading to the pressure switch 32 in the T-branch.
  • the free end 36 of the hose fitting 30 forms the outlet of the pump unit.
  • the vane pump 1 connected to the electric motor 2 via the adapter part 15, the pressure switch 32 and the hose fitting 30 are arranged together with a circuit board 33 in the interior of an outer housing.
  • the outer housing consists of a box-shaped part 38 closed from above with a cover 37, which has a cylindrical extension 39 on its side facing away from the cover 37. Box-shaped part 38 and cylindrical extension 39 are glued, for example.
  • the cover 37 can also be glued to the box-shaped part 38 or can be held by snap closures, which are not shown in the drawing but are known per se.
  • Openings 40 are arranged in the cover 37, via which the interior of the outer housing 37 to 39 is connected to the ambient atmosphere.
  • the openings 40 can also be covered with a cover made of, in particular, open-cell foam.
  • the electric motor 2 with the vane pump 1 attached to it is positively secured against rotation by form rings 41, 42 which are made of rubber or other elastic materials.
  • the electric motor stands on the bottom of the molded ring 42 and is held from above by a rubber ring 43 which is elastically slightly deformed, like the other molded rings 41, 42, and which is supported on the inside of the cover 37.
  • the electric motor is controlled via connecting cables 44, 45, which are guided in the interior of the outer housing 37 to 39, and via connecting lines 45, also not shown, which lead to the circuit board 33.
  • the electronic circuit arranged on the circuit board 33 is supplied with current via connecting lines 46, which are only shown in broken lines in the drawing.
  • the interior of the cylindrical extension 39 of the outer housing - as can be seen from what has been said above - is separated from the rest of the interior in the box-shaped part 38 of the outer housing by the molded ring 41 inserted with slight prestress. For this reason, the molded ring 41 is connected to a plurality of flow openings 47 connecting the interior spaces mentioned.
  • the function of the pump unit is as follows: When the rotor 8 rotates in the direction of the arrow 48 (FIG. 2), pressure medium is drawn in through the medium channel 23 and a negative pressure is generated in the medium channel 23. In this direction of rotation, the vane pump works as a pressure sink. The pressure medium ejected via the medium channel 22 reaches the interior 19 and from there via the interior of the electric motor 2 and the opening 29 into the interior of the cylindrical extension 39 of the outer housing. From there, the pressure medium finally reaches the openings 40 in the cover 37 via the flow openings 47, from where the pressure medium can flow to the free ambient atmosphere. About the pressure switch 32, the electric motor 2 is always set in motion when the vacuum z. B. has not yet reached a set value.
  • the vane pump 1 may also have to act as a pressure source.
  • the power supply line to the electric motor 2 is reversed by means of the electronic control circuit on the circuit board 33, so that the motor 8 rotates counter to the arrow 48. It is obvious that the flow direction described above is reversed and that a pressure which is higher than the external pressure is present in the medium channel 23.
  • the flow noise is very strongly damped by the fact that the interior of the outer housing 37 to 39 and the interior of the electric motor 2 and the interior 19 of the adapter part 15 act as cascaded sound-absorbing chambers.
  • the molded rings 41, 42, 43 which are made of rubber or a similarly damping material, provide structure-borne noise decoupling of the pump unit from the outer housing 37 to 39.
  • the shaped piece 30 likewise causes structure-borne noise to be decoupled from the pump unit in relation to the outer housing 37 to 39.
  • the throttling point 34 results in an airborne sound decoupling of the pressure switch 32 connected to the outer housing 37 to 39 in a sound-conducting manner: due to the throttling point, only a quasi-static pressure is present at the pressure switch, so that the dynamic pressure fluctuations that stimulate the pressure switch to emit sound cannot reach the pressure switch.
  • the rubber material of the T-branch also decouples structure-borne noise.

Landscapes

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

Claims (12)

1. Unité de pompe entraînée par un moteur électrique, composée d'une pompe à palettes ayant un boîtier avec deux canaux à fluide pour l'alimentation et l'évacuation du fluide sous pression, le boîtier de la pompe à palettes étant fixé sur le boîtier du moteur électrique par une pièce d'adaptateur, et l'un des canaux de fluide débouchant dans le volume intérieur de la pièce d'adaptateur, caractérisée en ce que le volume intérieur (19) fermé de la pièce d'adaptateur (15) est relié par au moins un orifice de passage (24) au volume intérieur du boîtier du moteur électrique (2).
2. Unité de pompe selon la revendication 1, caractérisée en ce que le volume intérieur du moteur électrique (2) est relié, par au moins un passage (29) prévu dans sa paroi de boîtier, au côté extérieur du moteur électrique, passage qui est prévu à une extrémité du boîtier du moteur électrique (2) opposée à celle comportant l'orifice de passage (24).
3. Unité de pompe selon l'une des revendications 1 ou 2, caractérisée en ce que la section d'écoulement de l'orifice de passage (24) est plus ou moins égale à celle du canal de fluide (22) débouchant dans le volume intérieur (19) de la pièce d'adaptateur (15).
4. Unité de pompe selon l'une des revendications précédentes, caractérisée en ce que la pièce d'adaptateur (15) présente une paroi frontale (16) de préférence plane comportant l'orifice de passage (24) débouchant dans le volume intérieur du moteur électrique (2).
5. Unité de pompe selon l'une des revendications précédentes, caractérisée en ce que l'autre canal de fluide (23) passe dans un ajutage de raccordement (26) prévu sur la pièce d'adaptateur (15).
6. Unité de pompe selon l'une des revendications précédentes, caractérisée en ce que l'autre canal de fluide (23) passe par une pièce tubulaire, moulée (30) en caoutchouc ou en un matériau analogue, emmanchée notamment sur l'ajutage de raccordement (26).
7. Unité de pompe selon la revendication 6, caractérisée en ce que le canal de fluide (23) est relié à la chambre de commande d'un pressostat (32) de préférence commandé par membrane, de préférence par l'intermédiaire d'une pièce de dérivation T (31 ), de la pièce tubulaire moulée (30), pour commander le moteur électrique (2) de l'unité de pompe.
8. Unité de pompe selon au moins l'une des revendications précédentes, caractérisée en ce que la pompe à palettes (1 ) reliée au moteur électrique (2), le pressostat (32) et la pièce tubulaire moulée (30) et, le cas échéant, une platine de commutation portant le circuit de commande électronique sont prévus à l'intérieur du boîtier extérieur (37, 39) en étant positionnés par des moyens de fixation (41-43) d'isolation phonique des pièces.
9. Unité de pompe selon la revendication 8, caractérisée en ce que le boîtier extérieur (37-39) se compose d'une partie en forme de boîte (38) dont le haut est fermé par un couvercle (37), et qui présente un prolongement cylindrique (39) du côté opposé au couvercle (37), prolongement dans lequel le moteur électrique (2), et la pompe à palettes (1 ) qui lui est fixée, est bloqué en rotation de préférence par une liaison par la forme.
10. Unité de pompe selon l'une des revendications précédentes, caractérisée en ce que le volume intérieur du boîtier extérieur (37-39) est relié à l'atmosphère ambiante par des passages (40) dans le couvercle (37) et en ce que le volume intérieur du boîtier extérieur traversé par le fluide sous pression est subdivisé en des chambres (d'isolation phonique) de préférence par la bague moulée (41 ) munie d'orifices d'écoulement (47) et servant à la fixation du moteur électrique (2).
11. Unité de pompe selon l'une des revendications 1 à 10, caractérisée en ce que le volume intérieur (19) de la pièce d'adaptateur (15) est délimité par le boîtier de la pompe à palettes (1 ) et celui du moteur électrique (2).
12. Unité de pompe selon l'une des revendications 1 à 11, caractérisée en ce que l'orifice de passage (24) entre le volume intérieur (19) de la pièce d'adaptateur (15) et le volume intérieur du boîtier du moteur électrique (2) est réalisé comme point d'étranglement.
EP82109766A 1981-11-12 1982-10-22 Groupe de pompe entraîné par un moteur électrique Expired EP0081659B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3144983 1981-11-12
DE19813144983 DE3144983A1 (de) 1981-11-12 1981-11-12 Elektromotorisch angetriebenes pumpaggregat

Publications (2)

Publication Number Publication Date
EP0081659A1 EP0081659A1 (fr) 1983-06-22
EP0081659B1 true EP0081659B1 (fr) 1985-04-10

Family

ID=6146254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82109766A Expired EP0081659B1 (fr) 1981-11-12 1982-10-22 Groupe de pompe entraîné par un moteur électrique

Country Status (3)

Country Link
EP (1) EP0081659B1 (fr)
JP (1) JPS5888485A (fr)
DE (2) DE3144983A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61291797A (ja) * 1985-06-17 1986-12-22 Hitachi Ltd 回転ベ−ン式ポンプ
US5002467A (en) * 1989-02-17 1991-03-26 Walbro Corporation In-tank fuel pump mount
DE4107411A1 (de) * 1991-03-08 1992-09-17 Hella Kg Hueck & Co Einrichtung zur lagerung eines elektromotors an einem gehaeuse
DE4435494A1 (de) * 1994-10-04 1996-04-11 Bosch Gmbh Robert Hydroaggregat
BR9904147A (pt) 1998-08-06 2000-09-05 Mitsubishi Electric Corp Compressor giratório, ciclo de refrigeração que utiliza o compressor, e refrigerador que utiliza o compressor
DE19848413B4 (de) * 1998-10-21 2009-06-04 Pierburg Gmbh Motor-Pumpeneinheit
FR2829192B1 (fr) * 2001-09-05 2003-10-24 Peugeot Citroen Automobiles Sa Dispositif de pompage de l'air d'alimentation d'un organe fonctionnel de vehicule automobile
WO2014135202A1 (fr) * 2013-03-05 2014-09-12 Pierburg Pump Technology Gmbh Agencement de pompe à vide de véhicule automobile électrique
CN117722331A (zh) * 2018-02-12 2024-03-19 中山市艾能机械有限公司 一种湿喷机用一体式防水空压机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE562325C (de) * 1929-07-03 1932-10-24 Werner Sack Dipl Ing Gaspumpe mit umlaufenden Kolben
AT127658B (de) * 1930-07-11 1932-04-11 Gustav Friedl Elektrisch angetriebenes Kapselgebläse, insbesondere zum Kühlen des Films bei Tonfilmapparaten.
US3513476A (en) * 1967-06-21 1970-05-19 Tokyo Shibaura Electric Co Rotary compressors
FR2118490A5 (fr) * 1970-12-15 1972-07-28 Frigo Domenico
GB1425193A (en) * 1973-05-09 1976-02-18 Boc International Ltd Rotary compressors
JPS5346149A (en) * 1976-10-08 1978-04-25 Naka Tech Lab Insect preventing screen with blind

Also Published As

Publication number Publication date
JPS5888485A (ja) 1983-05-26
DE3144983A1 (de) 1983-05-19
DE3263018D1 (en) 1985-05-15
EP0081659A1 (fr) 1983-06-22

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