EP1343980A1 - System for damping vibrations coming from a motor - Google Patents

System for damping vibrations coming from a motor

Info

Publication number
EP1343980A1
EP1343980A1 EP01989453A EP01989453A EP1343980A1 EP 1343980 A1 EP1343980 A1 EP 1343980A1 EP 01989453 A EP01989453 A EP 01989453A EP 01989453 A EP01989453 A EP 01989453A EP 1343980 A1 EP1343980 A1 EP 1343980A1
Authority
EP
European Patent Office
Prior art keywords
motor
damping
natural vibration
free
arrangement according
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Withdrawn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
EP01989453A
Other languages
German (de)
French (fr)
Inventor
Michael Rosenbauer
Hubert Groll
Herbert Schmidt
Torbjörn Hansson
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete 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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1343980A1 publication Critical patent/EP1343980A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
    • F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted

Definitions

  • the invention relates to an arrangement for damping the vibrations emanating from an engine.
  • Vibrations from an engine can lead to unpleasant noise. This is e.g. particularly disturbing in household appliances, in particular in household appliances which are set up in the living area of a user, such as Dishwashers.
  • the invention is based on the idea of damping vibrations already occurring at the point at which they arise, so that they cannot be transferred to other parts at all.
  • the object is achieved according to the invention in that free-floating means for damping the natural vibration of the motor are attached to a housing of the motor. These so-called “vibration absorbers” are used to dampen vibrations at the point of origin, so that they cannot be transferred to other parts.
  • the free-swinging means for damping the natural vibration of the motor are at least one mass part coupled to the motor housing via at least one elastic connecting part, wherein several mass parts are connected to each other with at least one elastic connecting part.
  • the mass part and the connecting part are matched to one another for damping system-dependent pendulum vibrations of the engine, preferably to approximately 100 Hz vibrations.
  • the tuning of the natural frequency of the vibration damper counteracts the system-dependent oscillations of the engine and thereby reduces the vibration strength of the engine.
  • tuning to 100 Hz oscillations in particular is particularly effective.
  • the free-swinging means for damping the natural vibration of the motor are advantageously accommodated in a cover box arranged on the motor housing. This means that the mass and connecting parts protruding beyond the outer contour of the motor housing do not interfere any further. In this way it is ensured at the same time that these parts do not bump into other parts of the household appliance when installed in a household appliance and their vibration behavior is thereby impaired.
  • the free-swinging means for damping the natural vibration of the motor are attached to a motor used in a water-bearing household appliance, advantageously to a motor used in a water-bearing household appliance, and in a particularly advantageous manner to a motor of a circulation pump in a dishwasher.
  • household appliances e.g. water-carrying household appliances and in particular in dishwashers
  • the advantages of the invention are applied, since noise is particularly disruptive in household appliances which are set up in the living area of a user.
  • the invention therefore also relates to a dishwasher in which the free-swinging means according to the invention for damping the natural vibration of the motor are attached to a housing of the motor of at least one circulation pump and / or drain pump. Based on an embodiment shown in the drawing, the invention is explained in more detail below.
  • Free-floating means 3, 4 for damping the natural vibration of the motor 1 are attached to the outside of the motor housing 2 according to the invention, namely at least one mass part 3 coupled to the motor housing 2 via at least one elastic connecting part 4, in the exemplary embodiment two mass parts 3 connected via an elastic connecting part 4 are coupled, wherein a further elastic connecting part 4 is used for coupling to a fastening plate 5 which is fastened to the motor housing 2.
  • the mass parts 3 and the connecting parts 4 are matched to one another in such a way that they particularly strongly dampen the oscillations caused by the system from the electric motor, in the exemplary embodiment described 100 Hz vibrations, i.e. the natural frequency of mass parts 3 and connecting parts 4 is approximately 100 Hz in the exemplary embodiment described.

Abstract

The aim of the invention is to damp the vibrations coming from a motor (1) and leading to high levels of noise emission, at their point of origin. To this end, freely oscillating means (3, 4) are applied to a housing (2) of the motor (1) in order to damp the characteristic vibration of said motor (1).

Description

Anordnung zur Dämpfung der von einem Motor ausgehenden Arrangement for damping the outgoing from an engine
Schwingungenvibrations
Die Erfindung betrifft eine Anordnung zur Dämpfung der von einem Motor ausgehenden Schwingungen.The invention relates to an arrangement for damping the vibrations emanating from an engine.
Von einem Motor ausgehende Schwingungen können zu einer unangenehmen Geräuschentwicklung führen. Dies ist z.B. bei Haushaltsgeräten besonders störend, insbesondere bei Haushaltsgeräten, die im der Wohnbereich eines Benutzers aufgestellt sind, wie z.B. Geschirrspülmaschinen.Vibrations from an engine can lead to unpleasant noise. This is e.g. particularly disturbing in household appliances, in particular in household appliances which are set up in the living area of a user, such as Dishwashers.
Es ist daher durch die DE-A-197 58 249 bekannt, bei einer Geschirrspülmaschine die jeweils wenigstens eine von einem Elektromotor angetriebene Umwälzpumpe und/oder Abwasserpumpe über elastische Zwischenteile mit der Auffangwanne der Geschirrspülmaschine zu verbinden. Auf diese Weise wird die Übertragung der von den Elektromoto- ren ausgehenden Schwingungen auf die Auffangwanne weitgehend unterdrückt und dadurch einer zu starken Geräuschbildung entgegengewirkt.It is therefore known from DE-A-197 58 249 to connect the at least one circulation pump and / or sewage pump driven by an electric motor to the drip pan of the dishwasher in the case of a dishwasher via elastic intermediate parts. In this way, the transmission of the vibrations emanating from the electric motors to the drip pan is largely suppressed, thereby counteracting excessive noise.
Die Erfindung geht von dem Gedanken aus, entstehende Schwingungen bereits am Ort ihrer Entstehung zu dämpfen, so dass sie gar nicht auf weitere Teile übertragen werden können.The invention is based on the idea of damping vibrations already occurring at the point at which they arise, so that they cannot be transferred to other parts at all.
Die Lösung der gestellten Aufgabe gelingt nach der Erfindung dadurch, dass an einem Gehäuse des Motors freischwingende Mittel zur Dämpfung der Eigenschwingung des Motors angebracht sind. Mit diesen, sogenannten „Schwingungstilgern", werden entste- hende Schwingungen bereits am Ort ihrer Entstehung gedämpft, so dass sie gar nicht auf weitere Teile übertragen werden können.The object is achieved according to the invention in that free-floating means for damping the natural vibration of the motor are attached to a housing of the motor. These so-called "vibration absorbers" are used to dampen vibrations at the point of origin, so that they cannot be transferred to other parts.
Nach einer bevorzugten Ausführungsform der Erfindung sind die freischwingende Mittel zur Dämpfung der Eigenschwingung des Motors wenigstens ein an dem Motorgehäuse über wenigstens ein elastisches Verbindungsteil angekoppeltes Masseteil, wobei mehrere Masseteile untereinander mit jeweils wenigstens einem elastisches Verbindungsteil verbunden sind. Durch die Ankoppelung eines Masseteiles über ein elastisches Verbin- dungsteil werden auftretende Schwingungen stark gedämpft und können daher nicht mehr zu einer störenden Geräuschentwicklung führen.According to a preferred embodiment of the invention, the free-swinging means for damping the natural vibration of the motor are at least one mass part coupled to the motor housing via at least one elastic connecting part, wherein several mass parts are connected to each other with at least one elastic connecting part. By coupling a mass part via an elastic connection vibrations are strongly damped and can therefore no longer lead to annoying noise.
Besonders vorteilhaft ist es, dass das Masseteil und das Verbindungsteil für die Dämpfung von systembedingten Pendelschwingungen des Motors aufeinander abgestimmt sind, bevorzugt auf etwa 100 Hz-Schwingungen. Die Abstimmung der Eigenfrequenz des Schwingungstilgers wirkt den systembedingten Pendelschwingungen des Motors entgegen und vermindert dadurch die Schwingungsstärke des Motors. In der Praxis hat sich gezeigt, dass insbesondere die Abstimmung auf 100 Hz-Schwingungen besonders wirkungsvoll ist.It is particularly advantageous that the mass part and the connecting part are matched to one another for damping system-dependent pendulum vibrations of the engine, preferably to approximately 100 Hz vibrations. The tuning of the natural frequency of the vibration damper counteracts the system-dependent oscillations of the engine and thereby reduces the vibration strength of the engine. Practice has shown that tuning to 100 Hz oscillations in particular is particularly effective.
Vorteilhafterweise sind die freischwingende Mittel zur Dämpfung der Eigenschwingung des Motors in einem am Motorgehäuse angeordneten Abdeckkasten untergebracht. Damit stören die über die Außenkontur des Motorgehäuses vorstehenden Masse- und Verbindungsteile nicht weiter. Auf diese Weise wird gleichzeitig sichergestellt, dass diese Teile beim Einbau in ein Haushaltsgerät nicht an anderen Teilen des Haushaltsgerätes anstoßen und dadurch in ihrem Schwingungsverhalten beeinträchtigt werden.The free-swinging means for damping the natural vibration of the motor are advantageously accommodated in a cover box arranged on the motor housing. This means that the mass and connecting parts protruding beyond the outer contour of the motor housing do not interfere any further. In this way it is ensured at the same time that these parts do not bump into other parts of the household appliance when installed in a household appliance and their vibration behavior is thereby impaired.
Nach einer bevorzugten Ausführungsform der Erfindung sind die freischwingenden Mittel zur Dämpfung der Eigenschwingung des Motors an einem in einem wasserführenden Haushaltgerät verwendeten Motor angebracht, vorteilhafterweise an einem in einem wasserführenden Haushaltgerät verwendeten Motor einer Pumpe und in besonders vorteilhafter Weise an einem Motor einer Umwälzpumpe einer Geschirrspülmaschine. Mit diesen Maßnahmen werden bei Haushaltgeräten, z.B. wasserführenden Haushaltgeräten und insbesondere bei Geschirrspülmaschinen die Vorteile der Erfindung angewandt, da gera- de bei Haushaltsgeräten, die im der Wohnbereich eines Benutzers aufgestellt sind, eine Lärmentwicklung besonders störend ist.According to a preferred embodiment of the invention, the free-swinging means for damping the natural vibration of the motor are attached to a motor used in a water-bearing household appliance, advantageously to a motor used in a water-bearing household appliance, and in a particularly advantageous manner to a motor of a circulation pump in a dishwasher. With these measures, household appliances, e.g. water-carrying household appliances and in particular in dishwashers, the advantages of the invention are applied, since noise is particularly disruptive in household appliances which are set up in the living area of a user.
Die Erfindung betrifft daher auch eine Geschirrspülmaschine, in der an einem Gehäuse des Motors wenigstens einer Umwälzpumpe und/oder Entleerungspumpe die erfindungs- gemäßen freischwingende Mittel zur Dämpfung der Eigenschwingung des Motors angebracht sind. Anhand eines in der Zeichnung dargestellten Ausführungsbeispieles wird die Erfindung nachfolgend noch näher erläutert.The invention therefore also relates to a dishwasher in which the free-swinging means according to the invention for damping the natural vibration of the motor are attached to a housing of the motor of at least one circulation pump and / or drain pump. Based on an embodiment shown in the drawing, the invention is explained in more detail below.
Insbesondere bei Haushaltgeräten, z.B. wasserführenden Haushaltgeräten und ganz besonders bei Geschirrspülmaschinen, die im der Wohnbereich eines Benutzers aufgestellt sind, ist eine Lärmentwicklung besonders störend. Im Ausführungsbeispiel wird die erfindungsgemäße Anordnung am Beispiel einer nicht näher beschriebenen Umwälzpumpe einer ebenfalls nicht näher beschriebenen Geschirrspülmaschine erläutert.In particular for household appliances, e.g. Water-bearing household appliances and especially in dishwashers that are installed in the living area of a user, noise development is particularly disruptive. In the exemplary embodiment, the arrangement according to the invention is explained using the example of a circulation pump (not described in more detail) of a dishwasher (also not described in detail).
Mit 1 ist ein die Umwälzpumpe antreibender, in einer Draufsicht dargestellter, Elektromo- tor bezeichnet. An dem Motorgehäuse 2 sind außen erfindungsgemäß freischwingende Mittel 3, 4 zur Dämpfung der Eigenschwingung des Motors 1 angebaut, nämlich wenigstens ein an dem Motorgehäuse 2 über wenigstens ein elastisches Verbindungsteil 4 angekoppeltes Masseteil 3, im Ausführungsbeispiel zwei Masseteile 3, die über ein elastisches Verbindungsteil 4 gekoppelt sind, wobei ein weiteres elastisches Verbindungsteil 4 zur Koppelung mit einer Befestigungsplatte 5, die am Motorgehäuse 2 befestigt ist, dient.1 designates an electric motor which drives the circulation pump and is shown in a plan view. Free-floating means 3, 4 for damping the natural vibration of the motor 1 are attached to the outside of the motor housing 2 according to the invention, namely at least one mass part 3 coupled to the motor housing 2 via at least one elastic connecting part 4, in the exemplary embodiment two mass parts 3 connected via an elastic connecting part 4 are coupled, wherein a further elastic connecting part 4 is used for coupling to a fastening plate 5 which is fastened to the motor housing 2.
Die Masseteile 3 und die Verbindungsteile 4 sind so aufeinander abgestimmt, dass sie vor allem die von dem Elektromotor ausgehenden systembedingten Pendelschwingungen, im beschriebenen Ausführungsbeispiel 100 Hz-Schwingungen, besonders stark dämpfen, d.h. die Eigenfrequenz von Masseteilen 3 und Verbindungsteilen 4 beträgt im beschriebenen Ausführungsbeispiel etwa 100 Hz.The mass parts 3 and the connecting parts 4 are matched to one another in such a way that they particularly strongly dampen the oscillations caused by the system from the electric motor, in the exemplary embodiment described 100 Hz vibrations, i.e. the natural frequency of mass parts 3 and connecting parts 4 is approximately 100 Hz in the exemplary embodiment described.
Damit die über die Außenkontur des Motorgehäuses vorstehenden Masse- und Verbindungsteile 3 und 4 nicht weiter stören, sind sie vorteilhafterweise in einem am Motorge- häuse angeordneten Abdeckkasten 6 untergebracht. Auf diese Weise wird gleichzeitig sichergestellt, dass diese Teile beim Einbau in ein Haushaltsgerät nicht an anderen Teilen des Haushaltsgerätes anstoßen und dadurch in ihrem Schwingungsverhalten beeinträchtigt werden.So that the mass and connecting parts 3 and 4 projecting beyond the outer contour of the motor housing do not disturb further, they are advantageously accommodated in a cover box 6 arranged on the motor housing. In this way it is ensured at the same time that these parts do not bump into other parts of the household appliance when installed in a household appliance and their vibration behavior is thereby impaired.
Mit der erfindungsgemäßen Anordnung ist es möglich, entstehende Schwingungen bereits am Ort ihrer Entstehung zu dämpfen, so dass sie gar nicht auf weitere Teile übertragen werden können. With the arrangement according to the invention, it is possible to dampen vibrations that arise as soon as they occur, so that they cannot be transferred to other parts at all.

Claims

Patentansprüche claims
1. Anordnung zur Dämpfung der von einem Motor ausgehenden Schwingungen, dadurch gekennzeichnet, dass an einem Gehäuse (2) des Motors (1) freischwin- gende Mittel (3, 4) zur Dämpfung der Eigenschwingung des Motors (1) angebracht sind.1. Arrangement for damping the vibrations emanating from an engine, characterized in that freely oscillating means (3, 4) for damping the natural vibration of the engine (1) are attached to a housing (2) of the engine (1).
2. Anordnung nach Anspruch 1 , dadurch gekennzeichnet, dass die freischwingenden Mittel (3, 4) zur Dämpfung der Eigenschwingung des Motors (1) wenigstens ein an dem Motorgehäuse (2) über wenigstens ein elastisches Verbindungsteil2. Arrangement according to claim 1, characterized in that the free-swinging means (3, 4) for damping the natural vibration of the motor (1) at least one on the motor housing (2) via at least one elastic connecting part
(4) angekoppeltes Masseteil (3) sind, wobei mehrere Masseteile (3) untereinander mit jeweils wenigstens einem elastisches Verbindungsteil (4) verbunden sind.(4) are coupled mass part (3), wherein several mass parts (3) are connected to each other with at least one elastic connecting part (4).
3. Anordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Masse- teil (3) und das Verbindungsteil (4) für die Dämpfung von systembedingten Pendelschwingungen des Motors (1) aufeinander abgestimmt sind, bevorzugt auf etwa 100 Hz-Schwingungen.3. Arrangement according to claim 1 or 2, characterized in that the mass part (3) and the connecting part (4) for damping system-dependent oscillations of the engine (1) are coordinated, preferably to about 100 Hz vibrations.
4. Anordnung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die freischwingende Mittel (3, 4) zur Dämpfung der Eigenschwingung des Motors4. Arrangement according to one of claims 1 to 3, characterized in that the free-floating means (3, 4) for damping the natural vibration of the motor
(1) in einem am Motorgehäuse (2) angeordneten Abdeckkasten (6) untergebracht sind.(1) are housed in a cover box (6) arranged on the motor housing (2).
5. Anordnung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die freischwingenden Mittel (3, 4) zur Dämpfung der Eigenschwingung des Motors (1) an einem in einem wasserführenden Haushaltgerät verwendeten Motor (1) angebracht sind.5. Arrangement according to one of claims 1 to 4, characterized in that the free-swinging means (3, 4) for damping the natural vibration of the motor (1) are attached to a motor used in a water-conducting household appliance (1).
6. Anordnung nach Anspruch 5, dadurch gekennzeichnet, dass die freischwingen- den Mittel (3, 4) zur Dämpfung der Eigenschwingung des Motors (1) an einem in einem wasserführenden Haushaltgerät verwendeten Motor (1) einer Pumpe angebracht sind. 6. Arrangement according to claim 5, characterized in that the free-swinging means (3, 4) for damping the natural vibration of the motor (1) on a motor used in a water-carrying household appliance (1) of a pump are attached.
7. Anordnung nach Anspruch 6, dadurch gekennzeichnet, dass die freischwingenden Mittel (3, 4) zur Dämpfung der Eigenschwingung des Motors (1) an einem Motor (1) einer Umwälzpumpe einer Geschirrspülmaschine angebracht sind.7. Arrangement according to claim 6, characterized in that the free-swinging means (3, 4) for damping the natural vibration of the motor (1) on a motor (1) of a circulation pump of a dishwasher are attached.
8. Geschirrspülmaschine, dadurch gekennzeichnet, dass an einem Gehäuse (2) des Motors (1) wenigstens einer Umwälzpumpe und/oder Entleerungspumpe freischwingende Mittel (3, 4) zur Dämpfung der Eigenschwingung des Motors (1) angebracht sind. 8. Dishwasher, characterized in that on a housing (2) of the motor (1) at least one circulation pump and / or drainage pump free-floating means (3, 4) for damping the natural vibration of the motor (1) are attached.
EP01989453A 2000-12-14 2001-11-09 System for damping vibrations coming from a motor Withdrawn EP1343980A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10062370 2000-12-14
DE10062370A DE10062370A1 (en) 2000-12-14 2000-12-14 Arrangement for damping the vibration emanating from an engine
PCT/EP2001/012998 WO2002048572A1 (en) 2000-12-14 2001-11-09 System for damping vibrations coming from a motor

Publications (1)

Publication Number Publication Date
EP1343980A1 true EP1343980A1 (en) 2003-09-17

Family

ID=7667156

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01989453A Withdrawn EP1343980A1 (en) 2000-12-14 2001-11-09 System for damping vibrations coming from a motor

Country Status (4)

Country Link
US (1) US20040055410A1 (en)
EP (1) EP1343980A1 (en)
DE (1) DE10062370A1 (en)
WO (1) WO2002048572A1 (en)

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US9211048B2 (en) 2011-01-20 2015-12-15 Whirlpool Corporation Dampened pump assembly for a dishwasher
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Also Published As

Publication number Publication date
WO2002048572A1 (en) 2002-06-20
DE10062370A1 (en) 2002-06-20
US20040055410A1 (en) 2004-03-25

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