EP0711921B1 - Electric motor-driven air pump - Google Patents

Electric motor-driven air pump Download PDF

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Publication number
EP0711921B1
EP0711921B1 EP95111123A EP95111123A EP0711921B1 EP 0711921 B1 EP0711921 B1 EP 0711921B1 EP 95111123 A EP95111123 A EP 95111123A EP 95111123 A EP95111123 A EP 95111123A EP 0711921 B1 EP0711921 B1 EP 0711921B1
Authority
EP
European Patent Office
Prior art keywords
electric motor
casing
pump
motor
cover
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
EP95111123A
Other languages
German (de)
French (fr)
Other versions
EP0711921A1 (en
Inventor
Günter van de Venne
Rainer Peters
Klaus Muckelmann
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.)
Pierburg GmbH
Original Assignee
Pierburg 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 Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP0711921A1 publication Critical patent/EP0711921A1/en
Application granted granted Critical
Publication of EP0711921B1 publication Critical patent/EP0711921B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/20—Manufacture essentially without removing material
    • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
    • F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
    • F05D2230/239—Inertia or friction welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the invention relates to an electrically driven air pump, for example for Motor vehicles in which so-called secondary air is conveyed into the exhaust pipe system should be to improve the exhaust gas values.
  • DE-A1 23 28 653 shows a method for joining plastic parts, in which a Partial seam surfaces swell with pure solvent, preferably without Filler, is provided. After kneading, hot kneading takes place e.g. B. by ultrasonic or friction welding, it being stated in the document that the supplied energy only has to be sufficient to knead the swollen seam parties and not to fuse the pure plastic.
  • the invention has for its object to provide a method for producing Air pump with reduced vibrations or reduced running noise at which Leaks in joints are turned off, while also being a simplified Pump structure for large series production is to be achieved.
  • FIG. 1 shows the air pump 1 according to the invention, consisting of a plastic Manufactured housing 2, which houses a pump unit 3 on the one hand and on the other hand an electric motor 4.
  • the housing 1 is on the electric motor side by a cover 5 closed and has led out electrical connection cable 6 for the Electric motor 4.
  • the pump station side is closed by a cover 7 which has an air supply connection 8.
  • a stator 9 used, the guide channels 10, with which the a 1st impeller 11 air conveyed from the outer impeller outlet 12 in turn inner impeller inlet 13 of another impeller 14 is supplied. It goes without saying it goes without saying that a further stator 9 is used with each further pump stage.
  • the housing 2 has in Area of the last impeller 14 on an annular channel 15, into which the air from the impeller 14 exits and is led to a pressure connection.
  • the two wheels 11, 14 are attached with their hubs 16 to a shaft 17 of the electric motor 4, which in the pump station side protrudes.
  • the electric motor 4 is in a recess 19 by means of a first elastomer ring 18 a housing wall 20 separating the pump station side from the electric motor side a second elastomer ring 21 held.
  • the electric motor 4 with mounted pump impellers 11, 14 in installed condition, if the pump side is not yet closed by setting Balancing marks on the first impeller 11 is balanced, between the Impellers 11, 14, the stator 9 is arranged that radially, axially and non-rotatably in Housing 2 is held and during the cover assembly, the pump pressure levels from each other is sealed separately.
  • a particularly simple version of an air pump manufactured using the method is given when the elastomer ring 21 between the electric motor 2 and cover 5 is clamped and a bulge 28 which is elastically deformable in the axial direction has, which is loaded by an axial surface 29 of a support ring 30 which with Clip projections 31 snap into corresponding recesses 32 in the housing 2.
  • This version reduces running noise and simplifies installation under Elimination of individual parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Frames (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Regulating Braking Force (AREA)

Description

Die Erfindung betrifft eine elektrisch angetriebene Luftpumpe, beispielsweise für Kraftfahrzeuge, bei denen sogenannte Sekundärluft in das Abgasrohrsystem gefördert werden soll, um die Abgaswerte zu verbessern. The invention relates to an electrically driven air pump, for example for Motor vehicles in which so-called secondary air is conveyed into the exhaust pipe system should be to improve the exhaust gas values.

Bei einer derartigen Pumpe (EPA 0 385 298 A2) besteht das Problem, daß ihr Betrieb aufgrund von Unwuchten des Laufrades und des Elektromotors sowie des entstehenden magnetischen Drehfeldes unvermeidbar mit mehr oder weniger Vibrationen verbunden ist, die sich auf die Einrichtung, an der die Pumpe angeschlossen ist bzw. an der sie befestigt ist, übertragen und ein hochfrequentes Laufgeräusch verursachen. The problem with such a pump (EPA 0 385 298 A2) is that its operation due to imbalance of the impeller and the electric motor as well as the resulting magnetic rotating field inevitably associated with more or less vibrations which is related to the device to which the pump is connected or to which it is attached is transmitted and cause high-frequency running noise.

Aus der DE-A1 41 07 049 ist eine gattungsgemäße Luftpumpe bekannt, die mit Merkmalen ausgestattet ist, mit denen eine Verringerung der Vibrationen und der Laufgeräusche erzielt werden soll. From DE-A1 41 07 049 a generic air pump is known, which with Features that reduce vibration and vibration Running noise should be achieved.

Diese Merkmale bestehen im wesentlichen darin, daß der Elektromotor mittels zweier Elastomerringe zwischen Elektromotor und Gehäuselagerung abgestützt ist, die in einer besonderen Art zwischen Elektromotor und Gehäuse angeordnet sind, wobei sich der zweite Elastomerring unter der Spannung einer zwischen einem Deckel und Elastomerring eingespannten Feder in Axialrichtung des Elektromotors gegen diesen abstützt. These features consist essentially in that the electric motor by means of two Elastomer rings between the electric motor and housing bearing is supported in one are arranged between the electric motor and the housing, the second elastomer ring under tension one between a cover and Elastomer ring clamped spring in the axial direction of the electric motor against it supports.

Obwohl diese Maßnahmen insgesamt zu einer Verringerung der Vibrationen und der Laufgeräusche führen, liegt ein erheblicher Bauteile- und Fertigungsaufwand vor. Darüber hinaus können durch die Vielzahl der Bauteile, die miteinander durch Verschrauben zu verbinden sind, an den Fügungen Undichtigkeiten auftreten, wodurch der Wirkungsgrad der Pumpe vermindert wird. Although these measures reduce vibration and vibration overall Cause running noise, there is a considerable amount of components and production. In addition, due to the large number of components that go through each other Are to be screwed together, leaks occur at the joints, causing the efficiency of the pump is reduced.  

Die DE-A1 23 28 653 zeigt ein Verfahren zum Fügen von Kunststoffteilen, bei dem ein Anquellen von Teilfügenaht-Oberflächen mit reinem Lösungsmittel, vorzugsweise ohne Füllstoff, vorgesehen ist. Nach dem Zusammenfügen erfolgt dann eine Warmverknetung z. B. durch Ultraschall- oder Reibschweißen, wobei in der Schrift angegeben ist, daß die zugeführte Energie lediglich ausreichen muß, die gequollenen Nahtparteien zu verkneten und nicht den reinen Kunststoff zu verschmelzen. DE-A1 23 28 653 shows a method for joining plastic parts, in which a Partial seam surfaces swell with pure solvent, preferably without Filler, is provided. After kneading, hot kneading takes place e.g. B. by ultrasonic or friction welding, it being stated in the document that the supplied energy only has to be sufficient to knead the swollen seam parties and not to fuse the pure plastic.

Dieses Verfahren ist für die Großserienfertigung sehr aufwendig, da für das Anquellen eine bestimmte Zeitdauer vorzusehen ist und darüber hinaus freigesetztes Lösungsmittel oder Quellmaterial Verschmutzung bewirkt und die Umwelt belastet. This process is very complex for large series production because of swelling a certain period of time is to be provided and also released solvent or source material causes pollution and pollutes the environment.  

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren anzugeben zur Herstellung einer Luftpumpe mit verringerten Vibrationen bzw. verringertem Laufgeräusch, bei der Undichtigkeiten an Fügungen ausgeschaltet sind, wobei darüber hinaus ein vereinfachter Pumpenaufbau für eine Großserienfertigung erreicht werden soll. The invention has for its object to provide a method for producing Air pump with reduced vibrations or reduced running noise at which Leaks in joints are turned off, while also being a simplified Pump structure for large series production is to be achieved.

Diese Aufgabe ist bei dem angegebenen Verfahren durch die im Patentanspruch 1 angegebenen Merkmale gelöst worden. Vorteilhafte Weiterbildungen sind mit den Unteransprüchen angegeben. This object is in the specified method by the specified in claim 1 Features have been resolved. Advantageous further developments are with the Subclaims specified.

Mit der Erfindung erzielbare Vorteile sind in der nachfolgenden Beschreibung eines nach dem Verfahren hergestellten Ausführungsbeispiels der Erfindung angegeben, das in der Zeichnung dargestellt ist. Advantages that can be achieved with the invention are described in the following description the method produced embodiment of the invention specified in the Drawing is shown.

Diese zeigt:

  • Figur 1
    ein Ausführungsbeispiel nach der Erfindung;
  • Figur 2
    Einzelheit aus Figur 1.
    • This shows:
  • Figure 1
    an embodiment according to the invention;
  • Figure 2
    Detail from Figure 1.

    • Figur 1 zeigt die erfindungsgemäße Luftpumpe 1, bestehend aus einem in Kunststoff gefertigten Gehäuse 2, das einerseits ein Pumpenwerk 3 aufnimmt und andererseits einen Elektromotor 4. Das Gehäuse 1 ist auf der Elektromotorseite von einem Deckel 5 verschlossen und weist herausgeführte elektrische Anschlußkabel 6 für den Elektromotor 4 auf. Die Pumpenwerkseite ist von einem Deckel 7 verschlossen, der einen Luftzuführanschluß 8 aufweist. Zwischen Deckel 7 und Gehäuse 2 ist bei dieser Luftpumpe 1 ein Leitrad 9 eingesetzt, das Leitkanäle 10 aufweist, mit denen die von einem 1. Laufrad 11 geförderte Luft vom äußeren Laufradaustritt 12 wiederum dem inneren Laufradeintritt 13 eines weiteren Laufrades 14 zugeführt wird. Es versteht sich von selbst, daß mit jeder weiteren Pumpenstufe ein weiteres Leitrad 9 eingesetzt wird. Das Gehäuse 2 weist im Bereich des letzten Laufrades 14 einen ringförmigen Kanal 15 auf, in den die Luft aus dem Laufrad 14 austritt und zu einem Druckanschluß geführt wird. Die beiden Laufräder 11, 14 sind mit ihren Naben 16 auf einer Welle 17 des Elektromotors 4 befestigt, die in die Pumpenwerkseite hineinragt. Figure 1 shows the air pump 1 according to the invention, consisting of a plastic Manufactured housing 2, which houses a pump unit 3 on the one hand and on the other hand an electric motor 4. The housing 1 is on the electric motor side by a cover 5 closed and has led out electrical connection cable 6 for the Electric motor 4. The pump station side is closed by a cover 7 which has an air supply connection 8. Between cover 7 and housing 2 is in this Air pump 1, a stator 9 used, the guide channels 10, with which the a 1st impeller 11 air conveyed from the outer impeller outlet 12 in turn inner impeller inlet 13 of another impeller 14 is supplied. It goes without saying it goes without saying that a further stator 9 is used with each further pump stage. The housing 2 has in   Area of the last impeller 14 on an annular channel 15, into which the air from the impeller 14 exits and is led to a pressure connection. The two wheels 11, 14 are attached with their hubs 16 to a shaft 17 of the electric motor 4, which in the pump station side protrudes.

    Der Elektromotor 4 ist mittels eines ersten Elastomerringes 18 in einer Ausnehmung 19 einer die Pumpenwerkseite von der Elektromotorseite trennenden Gehäusewand 20 und eines zweiten Elastomerringes 21 gehalten. The electric motor 4 is in a recess 19 by means of a first elastomer ring 18 a housing wall 20 separating the pump station side from the electric motor side a second elastomer ring 21 held.

    Es ist vorgesehen, daß der Elektromotor 4 mit montierten Pumpenlaufrädern 11, 14 in eingebautem Zustand, bei noch nicht verschlossener Pumpenseite durch Setzen von Auswuchtmarken an dem ersten Laufrad 11 ausgewuchtet wird, wobei zwischen den Laufrädern 11, 14 das Leitrad 9 angeordnet ist, daß radial, axial und unverdrehbar im Gehäuse 2 gehalten ist und bei der Deckelmontage, die Pumpendruckstufen voneinander trennend abgedichtet wird. It is envisaged that the electric motor 4 with mounted pump impellers 11, 14 in installed condition, if the pump side is not yet closed by setting Balancing marks on the first impeller 11 is balanced, between the Impellers 11, 14, the stator 9 is arranged that radially, axially and non-rotatably in Housing 2 is held and during the cover assembly, the pump pressure levels from each other is sealed separately.

    Erfindungsgemäß ist nun folgendes Verfahren zur Herstellung der Luftpumpe vorgesehen, bei dem der Deckel 7, das Leitrad 9 und das Gehäuse 2 aus Kunststoff bestehen und durch Reibschweißen verbunden und abgedichtet sind, wobei bei der Zusammenfügung der Bauteile vor dem Reibschweißen in den Verschweißungszonen 22, 23 eine elastische/plastische Verformung von einander berührenden Wänden des Deckels 7, des Leitrades 9 und des Gehäuses 2 vorliegt, wie in Figur 2 dargestellt ist, die eine vergrößerte Einzelheit aus Figur 1 zeigt. Hierdurch wird gegenüber einer Pumpe des Standes der Technik ein Entfall von Bauteilen, Dichtungen und Schrauben erreicht, wobei die Verschweißungszonen 22, 23 eine absolute Dichtigkeit gewähren. According to the invention is now the following method for manufacturing the air pump provided in which the cover 7, the stator 9 and the housing 2 made of plastic exist and are connected and sealed by friction welding, with the Assembly of the components before friction welding in the welding zones 22, 23 an elastic / plastic deformation of contacting walls of the Cover 7, the stator 9 and the housing 2 is present, as shown in Figure 2, which shows an enlarged detail from Figure 1. This is compared to a pump the state of the art eliminates components, seals and screws, the welding zones 22, 23 guarantee absolute tightness.

    Dadurch, daß die verbleibende Öffnung 25 zur Kabeldurchführung rechtwinklig zur Motorachse aus dem Gehäuse 2 heraus geführt ist, besteht in Weiterbildung des Verfahrens die Möglichkeit, daß die Öffnung 25 und ebenso die Motorseite ebenfalls durch Reibschweißen zwischen dem Deckel 5 und einer Verschlußkappe 26 und dem Gehäuse 2 verschlossen und abgedichtet ist. Hierbei erfolgt die Zusammenfügung aller Bauteile vor dem Reibschweißen mit elastischer/plastischer Verformung von Wänden in den Verschweißzonen 24, 27. The fact that the remaining opening 25 for cable entry at right angles to Motor axis is guided out of the housing 2, is a further development of Procedure the possibility that the opening 25 and also the motor side as well by friction welding between the lid 5 and a closure cap 26 and the Housing 2 closed and   is sealed. Here, all components are assembled before Friction welding with elastic / plastic deformation of walls in the Welding zones 24, 27.

    Eine besonders einfache Ausführung einer nach dem Verfahren hergestellten Luftpumpe ist gegeben, wenn der Elastomerring 21 zwischen Elektromotor 2 und Deckel 5 eingespannt ist und eine in Axialrichtung elastisch verformbare Auswulstung 28 aufweist, die durch eine Axialfläche 29 eines Stützringes 30 belastet wird, der mit Klippsvorsprüngen 31 in entsprechende Ausnehmungen 32 des Gehäuses 2 einrastet. Diese Ausführung verringert das Laufgeräusch und vereinfacht die Montage unter Fortfall von Einzelteilen. A particularly simple version of an air pump manufactured using the method is given when the elastomer ring 21 between the electric motor 2 and cover 5 is clamped and a bulge 28 which is elastically deformable in the axial direction has, which is loaded by an axial surface 29 of a support ring 30 which with Clip projections 31 snap into corresponding recesses 32 in the housing 2. This version reduces running noise and simplifies installation under Elimination of individual parts.

    Claims (3)

    1. Method for manufacturing an electrically-powered air pump (1), consisting of a casing (2) with a pump unit (3) arranged on one side, which unit is connected to an electric motor (4) arranged on the other side and is executed with two or more impellers (11, 14), a guide wheel (9) being assigned to the second or each further impeller (14) and the pump and motor sides of the casing (2) being closed by covers (7 and 5) and the electric motor (4) being supported by means of two elastomer rings (18, 21) between the electric motor (4) and the casing bearing assembly, in which the cover (7) of the pump side, the guide wheel or wheels (9) and the casing (2) consist of synthetic material and on assembly of the components elastic/plastic deformation of walls in contact with one another takes place and the components are joined and sealed by friction welding.
    2. Method according to claim 1, characterized in that an opening (25) for leading electric motor connection cables (6) through is led out of the casing (2) at right angles to the motor axis and that this opening (25) and the motor side of the casing (2) are closed on assembly with a sealing cap (26) or the cover (5) of the motor side, which both consist of synthetic material, under elastic/plastic deformation of walls of the components and are joined and sealed by friction welding.
    3. Method according to any of the above claims, characterized in that the elastomer ring (21) is fixed between the electric motor (4) and cover (5) and has a swelling (28), which is elastically deformed in an axial direction and is loaded by an axial face (29) of a bearing ring (30), which engages by means of clip projections (31) in corresponding recesses (32) of the casing (2).
    EP95111123A 1994-10-29 1995-07-15 Electric motor-driven air pump Expired - Lifetime EP0711921B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE4438747A DE4438747A1 (en) 1994-10-29 1994-10-29 Electrically powered air pump
    DE4438747 1994-10-29

    Publications (2)

    Publication Number Publication Date
    EP0711921A1 EP0711921A1 (en) 1996-05-15
    EP0711921B1 true EP0711921B1 (en) 1998-05-13

    Family

    ID=6532051

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP95111123A Expired - Lifetime EP0711921B1 (en) 1994-10-29 1995-07-15 Electric motor-driven air pump

    Country Status (4)

    Country Link
    US (1) US5639228A (en)
    EP (1) EP0711921B1 (en)
    DE (2) DE4438747A1 (en)
    ES (1) ES2116013T3 (en)

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    DE102006021240B4 (en) * 2006-04-28 2008-01-31 Bühler Motor GmbH rotary pump
    FR2905206B1 (en) * 2006-08-28 2016-09-02 Valeo Systemes Thermiques Branche Thermique Habitacle MOTORCYCLE GROUP WITH ENHANCED COOLING.
    US8974197B2 (en) * 2010-02-16 2015-03-10 Halla Visteon Climate Control Corporation Compact structure for an electric compressor
    WO2012084059A1 (en) 2010-12-23 2012-06-28 Kongsberg Automotive Ab Motor and pump assembly for mounting in a vehicle seat
    EP3208472B1 (en) * 2014-10-14 2023-04-05 Panasonic Intellectual Property Management Co., Ltd. Centrifugal blower and automobile provided with same
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    CN106286345A (en) * 2016-09-01 2017-01-04 温州市彼得汽车部件有限公司 A kind of energy-efficient automobile secondary air pump
    CN108286524B (en) * 2018-03-31 2023-12-29 浙江日井泵业股份有限公司 Pipeline pump with self-priming function
    WO2020201366A1 (en) * 2019-04-03 2020-10-08 Maersk Container Industry A/S Compressor or pump housing assembly and method of assembly of a compressor or pump housing
    JP2021065463A (en) * 2019-10-24 2021-04-30 株式会社マキタ Dust collector
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    KR102402561B1 (en) * 2020-08-19 2022-05-26 지엠비코리아 주식회사 Electric water pump
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    Also Published As

    Publication number Publication date
    EP0711921A1 (en) 1996-05-15
    DE59502163D1 (en) 1998-06-18
    ES2116013T3 (en) 1998-07-01
    DE4438747A1 (en) 1996-05-02
    US5639228A (en) 1997-06-17

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