EP1096050B1 - Verfahren zum Auswuchten von rotierenden Körpern - Google Patents
Verfahren zum Auswuchten von rotierenden Körpern Download PDFInfo
- Publication number
- EP1096050B1 EP1096050B1 EP00122114A EP00122114A EP1096050B1 EP 1096050 B1 EP1096050 B1 EP 1096050B1 EP 00122114 A EP00122114 A EP 00122114A EP 00122114 A EP00122114 A EP 00122114A EP 1096050 B1 EP1096050 B1 EP 1096050B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- speed
- imbalance
- balancing
- drum
- weights
- 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
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
- D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal axis
- D06F37/225—Damping vibrations by displacing, supplying or ejecting a material, e.g. liquid, into or from counterbalancing pockets
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
- D06F33/48—Preventing or reducing imbalance or noise
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/26—Unbalance; Noise level
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/16—Imbalance
Definitions
- the invention relates to a method for balancing a body, by a regulated Drive is set in rotation, using a balancing device consisting of at least one circulating with the body, arranged concentrically to its axis of rotation annular track, within which weights are arranged freely movable, and using an unbalance detection device that detects the unbalanced excursions of the system consisting of the body and the balancing device during the rotation and / or its unbalanced speed fluctuations in an imbalance signal with the system in a first method step for unbalance detection with a speed below its critical speed or below the critical speed its storage system is rotated and wherein the balancing device is such, that the weights at this speed of the (the) career (s) are taken.
- the invention particularly relates to such a method for balancing the drum of a Drum washing machine.
- a balancing device of the aforementioned type is known for example from EP 0 640 192 known. This is a so-called Kugelauswuchter, in which within the Raceways balls are arranged freely movable.
- balancers The disadvantage of these balancers is that the workspace is elementary of the chosen one Frequency range or the speed of the body to be balanced depends. An unrestricted Effect is only in the frequency range above the highest resonance frequency (the largest critical speed) of the body or its entire storage system, consisting guaranteed from the suspension or attachment o. The like., Between the resonances (critical speeds), the balancer only partially compensates imbalances (see, for example, Kellenberger: Elastic balancing; Springer Verlag; P. 402f, esp. P. 408, Fig. 20.6).
- the invention thus presents the problem of a method for balancing a rotating To reveal body of the type mentioned, in which safe and as short as possible Time a compensation of the imbalance before passing through the critical speed range or its resonant frequencies is reached.
- the invention is based on the following finding:
- the passage through the critical speed range is usually very fast and can be considered as a transition between the two phases described above.
- the slippage between the weights and the body imbalance causes two sinusoidal unbalance signals (also the weights represent an imbalance in uneven distribution in the track) with different frequencies superimpose and cause a beating of the total imbalance signal (s. Figure 2).
- the cause is that the body imbalance rotates with the speed of the body and the imbalance of the balls due to the slippage has a slightly lower speed. Since the speed difference is very low, the beating is low frequency. In the example of a washing machine drum described below, it is approximately 60 seconds at a drum speed of 100 min -1 . At the minimum of beating, body imbalance and center of gravity are opposite each other and compensate each other.
- the non-sinusoidal speed curve by a targeted control or control can be achieved in which the drive positive or negative Acceleration pulses are impressed on the rotating system. These pulses will be delivered in an advantageous manner so that they act periodically on the system.
- targeted impulses can (even with bodies with horizontal axis of rotation) the duration of the Beating be influenced.
- FIG. 4 shows, on the basis of a schematic diagram, the parts which are essential for the invention in one embodiment such a washing machine. It has a tub (1) in which a drum (2) for Recording of laundry (3) is rotatably mounted. The drive of the drum (2) via a Motor (4), the power transmission via a V-belt (5). In this case, the speed of the engine in a known manner by one in the microprocessor control (6) of the washing machine integrated motor controller (6a) program and state-dependent.
- the tub (1) is suspended from springs (7) swinging in the housing (8) and is for Damping of these vibrations in the lower area by shock absorbers (9) over the Caseback (10) supported. For further damping of the vibrations are on the tub (1) Additional weights (11) arranged so that it passes through the critical Speed range does not hit the housing (8).
- a so-called ball balancer used in the drum cap (in the front drum area, not shown) and possibly in addition in the drum bottom (in the rear drum area, not shown) is as a balancing system a so-called ball balancer used.
- Balls (13) arranged as weights and can be released in the circumferential direction of the drum move.
- each raceway (12) must be in tightest packing in a predetermined angular range are filled with balls.
- a ball balancer on the drum cap is sufficient.
- Imbalance masses in the rear part of the drum (2) have only a small lever in the front Part of the drum (2) a large lever arm.
- the imbalance forces are from the drum (2) via the bearings (not shown) to the oscillating unit (tub (1), springs (7), Shock absorbers (9)) passed.
- the oscillating unit tub (1), springs (7), Shock absorbers (9)
- the total load of the vibrating unit rise. The load is therefore on the torque and thus on the product of imbalance mass, acceleration and lever arm due. It is therefore sufficient to use the imbalance masses with the large lever arm to balance the front drum half.
- the on the imbalances A and B or on the resulting total imbalance C acting centrifugal force Vectorially, the weight force overlaps so that the weight signal is unbalance dependent is exposed to periodic fluctuations, which is used to determine the imbalance Computer circuit (6b) can be used.
- the displacement sensor (14) can For example, from DE 195 22 393 known acceleration sensor for unbalance be used.
- another Computer circuit (6c) the imbalance by evaluating the fluctuations of a speed-dependent Signal (motor current, slip ...) or the speed itself (with a tachogenerator (15)).
- An evaluation circuit (6d) integrated in the microprocessor control prepares this during the unbalance signal of the computer circuit (s) (6b, c) measured in the manner of the drum rotation, that only determines the envelope of the amount of imbalance signal and for further engine control is evaluated (see Figure 3).
- the inventive method for balancing the drum of a washing machine is based a speed-time profile shown in Figure 5 and operates as follows:
- the liquor is first pumped out of the tub (1). Then the spin start is started. It begins with the start of a measuring speed n Mess1 above the laundry application speed n A , but below the lowest resonance speed n R1 .
- n Mess1 a measuring speed above the laundry application speed n A , but below the lowest resonance speed n R1 .
- the speed for a short moment to a dewatering speed n E be increased, but the value must always be less than the lowest resonance speed n R1 .
- the speed is then lowered back to the measuring speed n Mess1 .
- the total imbalance C is sensed by the computer circuit (s) (6b, c). From the imbalance signal, the evaluation circuit evaluates the envelope of the signal amount to start the resonance passage in the beat minimum. For this purpose, the spin start is continued and the drum (2) accelerated to a speed above the resonance frequency n R1 .
- the beat frequency (see Figure 2) can be controlled by strong periodic acceleration pulses reduce, so that the duration until the passage through the beat minimum is shortened in time.
- the evaluation circuit (6d) then waits until the total imbalance falls below a threshold which is greater than the initially sensed minimum and is dependent on the first minimum, the total load, the type of wash and the run-up procedure. Thereafter, the actual spin start by the resonance speeds n Ri begins.
- a faster alternative is to calculate a start time for the spin start by the evaluation circuit (6d), which lies before the first beat minimum. This time depends on the operating point (load condition) of the washing machine and can be calculated by an algorithm from the envelope.
- the optimal point is in Range of the inflection point of the envelope, in any case before reaching the first Minimum.
- Another improvement is laundry imbalances in size and / or position to create consciously. Track the previously known methods for applying the laundry the goal is to position it as evenly as possible on the drum shell (2c). Because both the type of laundry as well as the amount of laundry by sensing different parameters (eg suction times, lye tank lowering, etc.) can be assumed to be known, can be adjusted by a speed pulse to the compensation capacity of the balls (13) generate corresponding laundry imbalance. In this case, the minimum beats almost the entire laundry imbalance compensated by the ball conglomerate. By the targeted positioning of the laundry imbalance to the ball conglomerate can be the time to Finding the minimum will be significantly shortened.
- these algorithms can also be repeated between the individual resonance regions n Ri . Due to the clever choice of the run-up profile, the balancing range n messi lying between individual resonant frequencies n Ri can likewise be used for the further imbalance minimization .
Description
Nach dem Waschgang wird die Trommel auf eine Drehzahl oberhalb der Anlegedrehzahl beschleunigt, so dass die Wäsche aufgrund der Zentrifugalkraft am Trommelmantel haftet und eventuell durch ungleichmäßige Verteilung eine Unwucht ausbildet. Die Position dieser Wäscheunwucht wird dann sensiert. Die Laufbahn des Kugelauswuchters ist mit einem viskosen Dämpfungsmittel (beispielsweise Silikonöl) gefüllt, dessen Viskosität derart dimensioniert ist, dass die Kugeln im Drehzahlbereich der Unwuchtsensierung noch frei abrollen. Anschließend wird die Trommel bei einer bestimmten, zuvor ermittelten Lage von Unwucht und Kugeln so stark beschleunigt, dass die Kugeln vom Dämpfungsmittel mitgerissen werden. Es soll damit erreicht werden, dass sich Unwucht und Kugelschwerpunkt gegenüberliegen und somit schon beim Durchlaufen des kritischen Drehzahlbereichs (Resonanzfrequenz) kompensieren. Der Nachteil dieses Verfahrens besteht in der starken Temperaturabhängigkeit der Dämpfungsmittel-Viskosität. Insbesondere bei einem Einsatz von Kugelauswuchtern in Waschmaschinen, bei denen die Laugentemperatur und damit die auch die Temperatur des Dämpfungsmittels zwischen 20°C und 100°C schwanken kann, ist eine Einhaltung der genauen Vorgabe des Reibungsverhaltens nur mit sehr teuren Ölen möglich. Außerdem ist die Phase, in der sich Kugeln und Wäscheunwucht gegenüberliegen, bei jeder Trommelumdrehung nur sehr kurz und es können Fehler bei der Sensierung der Unwuchtposition oder bei der exakten Positionierung der Kugeln auftreten, die beim Durchgang der Trommel durch den kritischen Drehzahlbereich nicht mehr berücksichtigt oder korrigiert werden können. Es kommt dann zu sehr starken Auslenkungen des schwingenden Aggregats.
- Figur 1
- den asymmetrischen Drehzahlverlauf eines rotierenden Körpers mit horizontaler Drehachse und geregeltem Antrieb
- Figur 2
- das Unwuchtsignal der aus Wäsche und Gewichten bestehenden Gesamtunwucht über der Zeit
- Figur 3
- die Hüllkurve des Betrags des Unwuchtsignals
- Figur 4
- eine Schemaskizze einer Waschmaschine zur Durchführung eines erfindungsgemäß ausgebildeten Auswuchtverfahrens
- Figur 5
- ein Drehzahl-Zeit-Profil bei einer solchen Waschmaschine
Claims (8)
- Verfahren zum Auswuchten eines Körpers, der durch einen geregelten Antrieb in Rotation versetzt wird, unter Verwendung einer Auswuchtvorrichtung, bestehend aus mindestens einer mit dem Körper umlaufenden, konzentrisch zu seiner Rotationsachse angeordneten kreisringförmigen Laufbahn (12), innerhalb der Gewichte (13) frei beweglich angeordnet sind, und unter Verwendung einer Unwuchterkennungseinrichtung (6b,c), die die unwuchtbedingten Auslenkungen des aus dem Körper und der Auswuchteinrichtung bestehenden Systems während der Rotation und/oder dessen unwuchtbedingte Drehzahlschwankungen in ein Unwuchtsignal umwandelt, wobei das System in einem ersten Verfahrensschritt zur Unwuchterkennung mit einer Drehzahl unterhalb seiner kritischen Drehzahl oder unterhalb der kritischen Drehzahl seines Lagersystems gedreht wird und wobei die Auswuchteinrichtung derart beschaffen ist, dass die Gewichte (13) bei dieser Drehzahl von der (den) Laufbahn(en) (12) mitgenommen werden,
dadurch gekennzeichnet, dass eine Auswerteschaltung (6d) die Hüllkurve des Betrags des Unwuchtsignals ermittelt und im Bereich ihres Minimums oder bei Unterschreiten eines Grenzwertes den Körper auf eine Drehzahl oberhalb seiner kritischen Drehzahl oder der kritischen Drehzahl seines Lagersystems beschleunigt. - Verfahren zum Auswuchten eines rotierenden Körpers nach Anspruch 1,
dadurch gekennzeichnet, dass die Auswerteschaltung unter Berücksichtigung von Betriebsparametem einen Wert zum Starten der Beschleunigung auf eine Drehzahl oberhalb der kritischen Drehzahl des Körpers oder seines Lagersystems ermittelt, wobei der Wert vor dem Erreichen des ersten Minimums der Hüllkurve des Betrags des Unwuchtsignals liegt. - Verfahren zum Auswuchten eines rotierenden Körpers nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass auf den Antrieb wirkende Drehzahlstell- bzw. Regelungsmittel während einer vollständigen Umdrehung des Systems mindestens einen positiven oder negativen Beschleunigungsimpuls auf das System abgeben. - Verfahren zum Auswuchten eines rotierenden Körpers nach Anspruch 3,
dadurch gekennzeichnet, dass die positiven oder negativen Beschleunigungsimpulse periodisch auf das System einwirken. - Verfahren zum Auswuchten eines um eine annähernd horizontale Drehachse rotierenden Körpers nach mindestens einem der Ansprüche 1 bis 4,
gekennzeichnet durch die Verwendung eines in der (den) Laufbahn(en) (12) angeordneten Mittels zur Erhöhung der Laufreibung der Gewichte oder des Strömungswiderstandes der Laufbahn(en). - Verfahren zum Auswuchten eines um eine annähernd horizontale Drehachse rotierenden Körpers nach Anspruch 5,
dadurch gekennzeichnet, dass das Mittel zur Erhöhung des Strömungswiderstandes der Laufbahn(en) (12) aus einem viskosen Dämpfungsmittel (14) besteht, dessen Viskosität derart beschaffen ist, dass die Gewichte (13) in dem Drehzahlbereich, in dem die Unwuchterkennung erfolgt, mitgenommen werden. - Verfahren zum Auswuchten der Trommel (2) einer Trommelwaschmaschine nach mindestens einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, dass die Unwuchterkennung oberhalb einer Drehzahl erfolgt, bei der die Wäsche durch Zentrifugalbeschleunigung am Trommelmantel (2c) anliegt. - Verfahren zum Auswuchten einer Trommel (2) nach Anspruch 7,
dadurch gekennzeichnet, dass eine nach Größe und/oder Position vorgegebene Wäscheunwucht erzeugt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19952464 | 1999-10-29 | ||
DE19952464A DE19952464C2 (de) | 1999-10-29 | 1999-10-29 | Verfahren zum Auswuchten eines rotierenden Körpers, der durch einen geregelten Antrieb in Rotation versetzt wird, und Verwendung des Verfahrens |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1096050A2 EP1096050A2 (de) | 2001-05-02 |
EP1096050A3 EP1096050A3 (de) | 2002-08-14 |
EP1096050B1 true EP1096050B1 (de) | 2005-08-17 |
Family
ID=7927509
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00122114A Expired - Lifetime EP1096050B1 (de) | 1999-10-29 | 2000-10-12 | Verfahren zum Auswuchten von rotierenden Körpern |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1096050B1 (de) |
AT (1) | ATE302300T1 (de) |
DE (2) | DE19952464C2 (de) |
ES (1) | ES2244383T3 (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10202252C1 (de) * | 2002-01-21 | 2003-03-20 | Miele & Cie | Verfahren zum Betrieb einer Waschmaschine |
DE10244426B4 (de) | 2002-09-24 | 2005-02-10 | Siemens Ag | Bearbeitungsmaschine |
KR101267334B1 (ko) | 2006-11-06 | 2013-05-23 | 삼성전자주식회사 | 세탁기의 볼 밸런서 제어방법 |
KR101085495B1 (ko) * | 2006-11-06 | 2011-11-23 | 삼성전자주식회사 | 드럼 세탁기의 터브 진동제어방법 |
KR101428477B1 (ko) | 2007-01-24 | 2014-08-12 | 삼성전자 주식회사 | 세탁기 및 그 제어방법 |
KR101287536B1 (ko) * | 2007-06-05 | 2013-07-18 | 삼성전자주식회사 | 세탁기 및 그 제어방법 |
KR101407959B1 (ko) | 2008-01-22 | 2014-06-20 | 삼성전자주식회사 | 볼 밸런서를 구비한 드럼 세탁기 및 그 제어방법 |
AU2010287081B2 (en) * | 2009-08-27 | 2014-03-06 | Lg Electronics Inc. | Control method of laundry machine |
US20120151690A1 (en) * | 2009-08-27 | 2012-06-21 | Jae Hyuk Jang | Control method of laundry machine |
CN102549208B (zh) | 2009-08-27 | 2015-07-08 | Lg电子株式会社 | 洗衣机的控制方法 |
DE102010053104B4 (de) | 2010-12-01 | 2012-12-13 | Diehl Ako Stiftung & Co. Kg | Wäschebehandlungsvorrichtung und Verfahren zum Steuern des Betriebs einer Wäschebehandlungsvorrichtung |
AU2013204355B2 (en) | 2012-12-21 | 2016-10-27 | Fisher & Paykel Appliances Limited | Improved laundry appliance |
US9493897B2 (en) | 2013-06-25 | 2016-11-15 | Whirlpool Corporation | Method of operation for a laundry treating appliance having a ball balance ring |
EP3702509B1 (de) * | 2019-02-28 | 2021-09-01 | BSH Hausgeräte GmbH | Haushaltsgerät mit kugelstabilisator und flüssigkeitsviskositätskontrolle |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3421845A1 (de) * | 1984-06-13 | 1985-12-19 | Robert Bosch Gmbh, 7000 Stuttgart | Vorrichtung zum erfassen der unwucht eines rotierenden koerpers |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3821239C2 (de) * | 1988-06-23 | 1996-10-24 | Dittel Walter Gmbh | Verfahren zum Auswuchten von rotierenden Teilen und Vorrichtung zur Durchführung des Verfahrens |
CA2069120C (en) * | 1992-05-21 | 2005-04-26 | Anton Gasafi | Weight compensating method and apparatus |
DE19506471C2 (de) * | 1995-02-24 | 1999-10-21 | Roland Schuehle | Verfahren zur elektronischen Bestimmung und Kontrolle der Güte der Ausrichtung aneinandergekuppelter Wellen und Vorrichtung zu dessen Durchführung |
DE19522393C2 (de) * | 1995-06-23 | 1998-04-09 | Miele & Cie | Vorrichtung und Verfahren zur Bestimmung der Unwucht bei einer Trommelwaschmaschine |
IT1289380B1 (it) * | 1996-05-30 | 1998-10-02 | Electrolux Zanussi Elettrodome | Lavabiancheria con procedimento perfezionato di bilanciamento dinamico |
DE19718321C1 (de) * | 1997-04-30 | 1998-10-29 | Miele & Cie | Verfahren zum Auswuchten von rotierenden Körpern |
DE19842610A1 (de) * | 1997-12-10 | 1999-07-01 | Miele & Cie | Verfahren zur Steuerung des Schleuderhochlaufs in einer Waschmaschine oder einem Waschtrockner |
DE19857663A1 (de) * | 1997-12-20 | 1999-06-24 | Miele & Cie | Trommelwaschmaschine oder Waschtrockner bzw. Verfahren zum Waschen und Schleudern von Waschgut in einer Waschmaschine oder einem Waschtrockner |
DE19804080B4 (de) * | 1998-02-03 | 2005-07-21 | AEG Hausgeräte GmbH | Verfahren zum Umverteilen von in eine Trommel in einer Waschmaschine eingebrachter Wäsche |
-
1999
- 1999-10-29 DE DE19952464A patent/DE19952464C2/de not_active Expired - Fee Related
-
2000
- 2000-10-12 ES ES00122114T patent/ES2244383T3/es not_active Expired - Lifetime
- 2000-10-12 EP EP00122114A patent/EP1096050B1/de not_active Expired - Lifetime
- 2000-10-12 DE DE50010961T patent/DE50010961D1/de not_active Expired - Lifetime
- 2000-10-12 AT AT00122114T patent/ATE302300T1/de not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3421845A1 (de) * | 1984-06-13 | 1985-12-19 | Robert Bosch Gmbh, 7000 Stuttgart | Vorrichtung zum erfassen der unwucht eines rotierenden koerpers |
Also Published As
Publication number | Publication date |
---|---|
DE50010961D1 (de) | 2005-09-22 |
ES2244383T3 (es) | 2005-12-16 |
ATE302300T1 (de) | 2005-09-15 |
EP1096050A2 (de) | 2001-05-02 |
EP1096050A3 (de) | 2002-08-14 |
DE19952464A1 (de) | 2001-05-23 |
DE19952464C2 (de) | 2002-05-08 |
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