EP0626194A1 - Mixer with vibratory drive - Google Patents

Mixer with vibratory drive Download PDF

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Publication number
EP0626194A1
EP0626194A1 EP94107256A EP94107256A EP0626194A1 EP 0626194 A1 EP0626194 A1 EP 0626194A1 EP 94107256 A EP94107256 A EP 94107256A EP 94107256 A EP94107256 A EP 94107256A EP 0626194 A1 EP0626194 A1 EP 0626194A1
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EP
European Patent Office
Prior art keywords
frame
spring
mixer according
mixer
deflected
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Granted
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EP94107256A
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German (de)
French (fr)
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EP0626194B1 (en
Inventor
Günther Schmidt
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Kuston Deutschland GmbH
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Kuston Deutschland GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
    • B01F31/20—Mixing the contents of independent containers, e.g. test tubes
    • B01F31/22—Mixing the contents of independent containers, e.g. test tubes with supporting means moving in a horizontal plane, e.g. describing an orbital path for moving the containers about an axis which intersects the receptacle axis at an angle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
    • B01F31/20—Mixing the contents of independent containers, e.g. test tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/40—Mounting or supporting mixing devices or receptacles; Clamping or holding arrangements therefor
    • B01F35/42—Clamping or holding arrangements for mounting receptacles on mixing devices

Definitions

  • the invention relates to a mixer with a vibratory drive for a movably mounted slide.
  • Mixers are known in various designs. Mixers with an agitator have the disadvantage that they act mechanically on the microstructure of the medium to be agitated, thereby destroying, for. B. can cause biological systems. Mixers of the type described at the outset, which work with vibratory drives, also include shaking containers which are set to oscillate in one direction, or rotating containers. However, these mixers only work at frequencies up to approx. 20 Hz. There are also ultrasonic mixers that work at frequencies above 20 kHz.
  • the object of the invention is to provide a mixer of the type described in the introduction which can carry out multidimensional oscillating movements at frequencies up to 20 kHz.
  • the specimen slide is mounted on a Y frame which can be moved horizontally in the Y direction is, which is supported with at least one Y-spring deflectable in the Y-direction on a horizontally movable X-frame, the X-frame is suspended from at least one X-spring deflectable in the X-direction, which is attached to a Base plate is supported, and that attack on the Y-frame and on the X-frame vibrating drives, which consist of permanent magnets and drive windings arranged opposite them.
  • Such a mixer is particularly suitable for use in different laboratories for a wide variety of mixing purposes. Since the vibratory drives designed according to the principle of a direct current linear motor only work in one spatial direction and can be controlled according to frequency and amplitude, the operating parameters of the mixer can be adapted to the respective requirements without difficulty.
  • a preferred embodiment is one in which the Y springs and the X springs are designed as leaf springs.
  • the Y-frame and the X-frame can have a rectangular to square outline, their associated leaf springs each being connected to opposite sides of the frame.
  • the springs should be designed so that they can absorb the attraction force caused by the permanent magnetic flux of the oscillating drive in question, without the desired direction-dependent spring deflection being impaired thereby.
  • the mixer according to the invention can also perform three-dimensional oscillating movements if in combination with the Measures described above, the X frame is supported on at least one Z spring which can be deflected in the Z direction and is connected to a frame which can move in the Z direction, and when at least one oscillating drive acts on the Z frame.
  • the specimen slide is connected via hinges with a hinge axis extending in the X direction to a spring plate which can be deflected in the Z direction and is connected to the Y frame, the Z frame also being connected to these hinges Spring plates which can be deflected in the Y direction are connected.
  • At least one device for changing the spring constant can be provided.
  • This can be a device for two-dimensionally changing the spring constant from a spring bar clamped on one side and a mass adjustable along the spring bar, or a device for one-dimensionally changing the spring constant from a spring bar clamped on one side or from a leaf spring clamped on one side, the or which is guided in a fork which can be adjusted parallel to it, the fork being guided in a housing arranged next to the spring bar or the leaf spring and being adjustable with an actuating drive, in particular a spindle drive.
  • the exact adjustability of the resonance point via the change in the spring constants allows to work with optimal efficiency with differently moving masses of the medium arranged on the slide within a certain range.
  • a device for one-dimensional Attack the change in the spring constant at least on one X spring of the X frame.
  • a device for changing the spring constant can be arranged between the X-frame or the Y-frame and a base plate, the spring bar being clamped on the base plate or a component connected to it and being guided in an articulated bearing of the frame.
  • the vibratory drives should be able to be controlled and / or regulated independently of one another according to frequency, amplitude and phase. By adjusting the directional vibratory drives can be set so that they always work with optimal efficiency.
  • the mixer can also be used for other purposes, e.g. B. to determine the viscosity of the media to be treated.
  • This device can include measuring loops integrated in the windings of the vibratory drives or the like. And downstream regulating and control devices. You can also see the changing viscosity of a medium during mixing via the change in the moment of inertia and the thus detecting the shifting of the resonance point. The amount to be adjusted at least one operating parameter of the oscillating drive or drives until the new resonance point is found is then a measure of the change in viscosity.
  • a fixed base plate 1 which carries two mutually spaced and mutually parallel mounting bracket 2.
  • mounting brackets 2 are each vertically downward, deflectable in the X direction and as leaf springs trained X-springs 3 attached, the lower ends of which are connected to the opposite sides of an X-frame from an X-frame plate 4 with lateral edge stiffeners 5.
  • Y springs 6 Connected to the edge stiffeners 5 are vertically upwardly extending Y springs 6, which can be deflected in the Y direction and are designed as leaf springs, the upper ends of which are connected to opposite sides of a rectangular Y frame made of a Y frame plate 7 with lateral edge stiffeners 5 .
  • a slide for the medium to be examined is arranged on the Y-frame plate 7.
  • Vibratory drives (not shown), which consist of permanent magnets and drive windings arranged opposite them, act on the X-frame plate 4 and on the Y-frame plate 7.
  • this X-frame together with the components connected to it, ie also the Y-frame and the slide, is set in vibration in the X direction.
  • the Y frame and also the specimen slide are set to oscillate in the Y direction with the aid of the associated oscillating drive.
  • a device for the two-dimensional change of the spring constants of the X-springs 3 and the Y-springs 6 is shown with dashed lines.
  • This device consists of a spring bar 8, the lower end of which in a on the base plate. 1 attached flange 9 is arranged and thereby clamped on the X-frame plate 4, and the upper end is guided in a spherical bearing 10 of the Y-frame plate 7.
  • the lower end of the spring rod 8 is surrounded by a threaded bushing 11 which carries a nut 12 which can be adjusted thereon.
  • the nut 12 has a guide 13 with little play for the spring bar 8.
  • the spring constant of the spring rod 8 is added to the spring constants of the X springs 3 and the Y springs 4.
  • the entire spring constants for the X direction and the Y direction can be changed by adjusting the nut 12 to adjust a resonance point .
  • the mixer shown in FIGS. 2 and 3 is designed for three-dimensional oscillating movements.
  • the X-frame plate 4 of the X-frame is connected on the underside via a spacer bar 14 in the center to a Z-spring 15 designed as a leaf spring, the ends of which via spring plates 16 which extend vertically upwards and can be deflected in the Y-direction in joints 17 with in X.
  • the direction extending joint axis are pivotally mounted.
  • the joints 17 are attached on the underside to a specimen slide 18 and also carry a spring plate 19 which can be deflected in the Z direction and which is connected in the center to the upper side of the Y frame plate 7 via a spacer bar 20 extending in the X direction.
  • the vibratory drives for the different directions each include a permanent magnet arrangement 21, which has a highly permeable yoke 2 on the top of the X frame plate 4 or on the underside of the Y frame plate 7 and on the outside of the ends of the Z spring 15 with webs 24 connecting a Z frame 23 are arranged.
  • the oscillating drives 15 also include drive windings 25, each of which is connected to associated stator carriers 27 via an electrically non-conductive, highly permeable backflow 26, these stator carriers 27 being firmly connected to a housing 28.
  • a device for changing the spring constant in the Y direction includes a housing 28 which is connected to the X-frame plate and which has a lateral flange 29 at the lower end into which the spring rod 8 is clamped, the upper end of which is guided in the spherical bearing 10 of the Y-frame plate 7.
  • a spindle 30 is mounted in the housing 28 and can be rotated with a rotary knob 31.
  • a spindle nut 32 is guided on the spindle 30 and has a fork 34 extending through a housing opening 33, in the fork slot 35 of which the spring rod 8 is guided.
  • the spring constant of the spring bar 8 is added to the spring constant of the Y-springs 6 and the entire spring constant can be changed by adjusting the fork 34.
  • the spring constant can also be changed in the Z direction.
  • the device described with reference to FIGS. 4 and 5 is aligned horizontally, the housing 28 on the associated stator carrier 27 for the Sterndrive is arranged while the free end of the spring rod 8 is guided in a spherical bearing 10 of the web 24.
  • the vibratory drives can be controlled and / or regulated independently of one another according to frequency, amplitude and phase. Furthermore, it is not shown that a device for detecting the operating parameters of the individual vibratory drives can be provided as a function of time.
  • the mixer shown enables contactless, targeted, controllable and time-influenced energy input into liquid, viscous, pasty or granular media and can be used for dispersing, mixing, segregating, sedimenting and separating materials.

Abstract

The invention relates to a mixer having a vibratory drive for a movably mounted object holder. A mixer which can perform multidimensional vibratory movements at frequencies of up to 20 kHz is characterised in that the object holder is mounted on a Y frame (7, 5) which is horizontally movable in the Y direction, which Y frame is supported on an X frame (4, 5) which is horizontally movable in the X direction by at least one Y spring (6) which can be deflected in the Y direction, in that the X frame is suspended on at least one X spring (3) which can be deflected in the X direction, which X spring is supported on a base plate and in that vibratory drives engage on the Y frame and on the X frame, which vibratory drives comprise permanent magnets (21) and drive coils (25) arranged opposite them. <IMAGE>

Description

Die Erfindung betrifft einen Mischer mit einem Schwingantrieb für einen beweglich gelagerten Objektträger.The invention relates to a mixer with a vibratory drive for a movably mounted slide.

Mischer sind in verschiedenen Ausführungen bekannt. Mischer mit einem Rührwerk haben den Nachteil, daß sie mechanisch auf die Mikrostruktur des zu rührenden Mediums einwirken und dadurch Zerstörungen, z. B. von biologischen Systeme hervorrufen können. Zu Mischern der eingangs beschriebenen Gattung, die mit Schwingantrieben arbeiten, gehören auch Schüttelbehälter, die in einer Richtung in eine schwingende Bewegung gesetzt werden, oder rotierende Behälter. Diese Mischer arbeiten allerdings nur bei Frequenzen bis zu ca. 20 Hz. Daneben gibt es Ultraschallmischer, die bei Frequenzen oberhalb von 20 Khz arbeiten.Mixers are known in various designs. Mixers with an agitator have the disadvantage that they act mechanically on the microstructure of the medium to be agitated, thereby destroying, for. B. can cause biological systems. Mixers of the type described at the outset, which work with vibratory drives, also include shaking containers which are set to oscillate in one direction, or rotating containers. However, these mixers only work at frequencies up to approx. 20 Hz. There are also ultrasonic mixers that work at frequencies above 20 kHz.

Aufgabe der Erfindung ist es, einen Mischer der eingangs beschriebenen Gattung anzugeben, der mehrdimensionale Schwingbewegungen bei Frequenzen bis zu 20 Khz ausführen kann.The object of the invention is to provide a mixer of the type described in the introduction which can carry out multidimensional oscillating movements at frequencies up to 20 kHz.

Diese Aufgabe wird dadurch gelöst, daß der Objektträger an einem horizontal in Y-Richtung beweglichen Y-Rahmen gelagert ist, der mit zumindest einer in Y-Richtung auslenkbaren Y-Feder auf einem horizontal in X-Richtung beweglichen X-Rahmen abgestützt ist, daß der X-Rahmen an zumindest einer in X-Richtung auslenkbaren X-Feder aufgehängt ist, die an eine Grundplatte abgestüzt ist, und daß am Y-Rahmen sowie am X-Rahmen Schwingantriebe angreifen, die aus Permanentmagneten und diesen gegenüberliegend angeordneten Antriebswicklungen bestehen. Ein derartiger Mischer eignet sich insbesondere zum Einsatz in verschiedenen Labors für die verschiedensten Mischzwecke. Da die nach dem Prinzip eines Gleichstrom-Linearmotors ausgebildeten Schwingantriebe jeweils nur in einer räumlichen Richtung arbeiten und nach Frequenz und Amplitude angesteuert werden können, lassen sich die Betriebsparameter des Mischers ohne Schwierigkeiten den jeweiligen Erfordernissen anpassen.This object is achieved in that the specimen slide is mounted on a Y frame which can be moved horizontally in the Y direction is, which is supported with at least one Y-spring deflectable in the Y-direction on a horizontally movable X-frame, the X-frame is suspended from at least one X-spring deflectable in the X-direction, which is attached to a Base plate is supported, and that attack on the Y-frame and on the X-frame vibrating drives, which consist of permanent magnets and drive windings arranged opposite them. Such a mixer is particularly suitable for use in different laboratories for a wide variety of mixing purposes. Since the vibratory drives designed according to the principle of a direct current linear motor only work in one spatial direction and can be controlled according to frequency and amplitude, the operating parameters of the mixer can be adapted to the respective requirements without difficulty.

Bevorzugt ist eine Ausführung, bei der die Y-Federn und die X-Federn als Blattfedern ausgebildet sind. Insbesondere können der Y-Rahmen und der X-Rahmen einen rechteckigen bis quadratischen Grundriß aufweisen, wobei ihre zugeordneten Blattfedern jeweils an einander gegenüberliegende Seiten der Rahmen angeschlossen sind. Abgesehen von Federverlusten ist damit eine praktische reibungsfreie Lagerung bzw. Abstützung möglich. Es versteht sich, daß die Federn so ausgelegt seien sollten, daß sie die durch den permanentmagnetischen Fluß des betreffenden Schwingantriebes hervorgerufene Anziehungskraft aufnehmen können, ohne daß dadurch die gewünschte richtungsabhängige Federauslenkung beeinträchtigt wird.A preferred embodiment is one in which the Y springs and the X springs are designed as leaf springs. In particular, the Y-frame and the X-frame can have a rectangular to square outline, their associated leaf springs each being connected to opposite sides of the frame. Apart from spring losses, practical, friction-free storage or support is possible. It is understood that the springs should be designed so that they can absorb the attraction force caused by the permanent magnetic flux of the oscillating drive in question, without the desired direction-dependent spring deflection being impaired thereby.

Der erfindungsgemäße Mischer kann auch dreidimensionale Schwingbewegungen ausführen, wenn in Kombination zu den oben beschriebenen Maßnahmen der X-Rahmen auf zumindest einer in Z-Richtung auslenkbaren Z-Feder abgestützt ist, die an einen in Z-Richtung beweglichen Rahmen angeschlossen ist, und wenn am Z-Rahmen zumindest ein Schwingantrieb angreift. Zur Stabilisierung des Objektträgers kann es vorteilhaft sein, wenn der Objektträger über Scharniere mit sich in X-Richtung erstreckende Scharnierachse an eine in Z-Richtung auslenkbare, mit dem Y-Rahmen verbundene Federplatte angeschlossen ist, wobei an diese Scharniere auch der Z-Rahmen über in Y-Richtung auslenkbare Federbleche angeschlossen ist.The mixer according to the invention can also perform three-dimensional oscillating movements if in combination with the Measures described above, the X frame is supported on at least one Z spring which can be deflected in the Z direction and is connected to a frame which can move in the Z direction, and when at least one oscillating drive acts on the Z frame. To stabilize the specimen slide, it can be advantageous if the specimen slide is connected via hinges with a hinge axis extending in the X direction to a spring plate which can be deflected in the Z direction and is connected to the Y frame, the Z frame also being connected to these hinges Spring plates which can be deflected in the Y direction are connected.

Nach bevorzugter Ausführung der Erfindung kann zumindest eine Einrichtung zur Veränderung der Federkonstanten vorgesehen werden. Dabei kann es sich um eine Einrichtung zur zweidimensionalen Veränderung der Federkonstante aus einem einseitig eingespannten Federstab und einer längs des Federstabs verstellbaren Masse handeln, oder um eine Einrichtung zur eindimensionalen Veränderung der Federkonstante aus einem einseitig eingespannten Federstab oder aus einer einseitig eingespannten Blattfeder, der bzw. die in einer parallel dazu verstellbaren Gabel geführt ist, wobei die Gabel in einem neben dem Federstab bzw. der Blattfeder angeordneten Gehäuse geführt und mit einem Stelltrieb, insbesondere Spindeltrieb, verstellbar ist. Die genaue Einstellbarkeit des Resonanzpunktes über die Veränderung der Federkonstanten gestattet es, bei unterschiedlich bewegten Massen des auf dem Objektträgers angeordneten Mediums innerhalb eines bestimmten Bereiches immer mit optimalen Wirkungsgrad zu arbeiten.According to a preferred embodiment of the invention, at least one device for changing the spring constant can be provided. This can be a device for two-dimensionally changing the spring constant from a spring bar clamped on one side and a mass adjustable along the spring bar, or a device for one-dimensionally changing the spring constant from a spring bar clamped on one side or from a leaf spring clamped on one side, the or which is guided in a fork which can be adjusted parallel to it, the fork being guided in a housing arranged next to the spring bar or the leaf spring and being adjustable with an actuating drive, in particular a spindle drive. The exact adjustability of the resonance point via the change in the spring constants allows to work with optimal efficiency with differently moving masses of the medium arranged on the slide within a certain range.

Im einzelnen kann eine Einrichtung zur eindimensionalen Veränderung der Federkonstante zumindest an einer X-Feder des X-Rahmens angreifen. Bei anderen Ausführungen kann zwischen dem X-Rahmen bzw. dem Y-Rahmen und einer Grundplatte eine Einrichtung zur Veränderung der Federkonstante angeordnet sein, wobei der Federstab an der Grundplatte oder einem damit verbundenen Bauteil eingespannt und in einem Gelenklager des Rahmens geführt ist.In particular, a device for one-dimensional Attack the change in the spring constant at least on one X spring of the X frame. In other embodiments, a device for changing the spring constant can be arranged between the X-frame or the Y-frame and a base plate, the spring bar being clamped on the base plate or a component connected to it and being guided in an articulated bearing of the frame.

Eine Verstellung des Resonanzpunktes in Z-Richtung ist möglich, wenn zwischen dem Z-Rahmen und einer Grundplatte eine Einrichtung zur Veränderung der Federkonstante angeordnet ist, wobei der sich horizontal erstreckende Federstab an der Grundplatte oder einem damit verbundenen Bauteil eingespannt und in einem Gelenklager des Z-Rahmens geführt ist.An adjustment of the resonance point in the Z direction is possible if a device for changing the spring constant is arranged between the Z frame and a base plate, the horizontally extending spring rod being clamped on the base plate or a component connected thereto and in a spherical bearing of the Z -Frame is guided.

Die Schwingantriebe sollten unabhängig voneinander nach Frequenz, Amplitude und Phase steuer- und/oder regelbar sein. Durch Nachregeln können die richtungsabhängigen Schwingantriebe so eingestellt werden, daß sie immer mit optimalen Wirkungsgrad arbeiten.The vibratory drives should be able to be controlled and / or regulated independently of one another according to frequency, amplitude and phase. By adjusting the directional vibratory drives can be set so that they always work with optimal efficiency.

Wenn ferner eine Einrichtung zum Erfassen der Betriebsparameter der einzelnen Schwingantriebe in Abhängigkeit von der Zeit vorgesehen wird, kann der Mischer auch für weitere Zwecke eingesetzt werden, z. B. zur Viskositätsbestimmung der zu behandelnden Medien. Zu dieser Einrichtung können in die Wicklungen der Schwingantriebe integrierte Meßschleifen oder dergl. und nachgeschaltete Regel- und Steuervorrichtungen gehören. Man kann auch die sich während des Mischens ändernde Viskosität eines Mediums über die Veränderung des Trägheitsmomentes und die sich damit einstellende Verschiebung des Resonanzpunktes erfassen. Der nachzustellende Betrag zumindest eines Betriebsparameters des oder der Schwingantriebe bis zum Auffinden des neuen Resonanzpunktes ist dann ein Maß für die Viskositätsänderung.If, in addition, a device is provided for detecting the operating parameters of the individual vibratory drives as a function of time, the mixer can also be used for other purposes, e.g. B. to determine the viscosity of the media to be treated. This device can include measuring loops integrated in the windings of the vibratory drives or the like. And downstream regulating and control devices. You can also see the changing viscosity of a medium during mixing via the change in the moment of inertia and the thus detecting the shifting of the resonance point. The amount to be adjusted at least one operating parameter of the oscillating drive or drives until the new resonance point is found is then a measure of the change in viscosity.

Im folgenden werden in der Zeichnung dargestellte Ausführungsbeispiele der Erfindung erläutert; es zeigen:

Fig. 1
schematisch und teilweise sowie in perspektivischer Darstellung einen Mischer für zweidimensionale Schwingbewegungen,
Fig. 2
schematisch und teilweise einen Schnitt durch einen Mischer für dreidimensionale Schwingbewegungen,
Fig. 3
einen Schnitt in Richtung III-III durch den Gegenstand nach Fig. 2,
Fig. 4
schematisch die Seitenansicht einer Einrichtung zur eindimensionalen Veränderung der Federkonstante eines Federstabes oder einer Blattfeder,
Fig. 5
den Gegenstand nach Fig. 4 in anderer Projektion.
Exemplary embodiments of the invention illustrated in the drawing are explained below; show it:
Fig. 1
schematically and partially and in perspective a mixer for two-dimensional oscillating movements,
Fig. 2
schematically and partially a section through a mixer for three-dimensional swinging movements,
Fig. 3
3 shows a section in the direction III-III through the object according to FIG. 2,
Fig. 4
schematically the side view of a device for one-dimensional change in the spring constant of a spring bar or a leaf spring,
Fig. 5
4 in a different projection.

Zu dem in Fig. 1 wiedergegebenen Mischer gehört eine feste Grundplatte 1, die zwei mit gegenseitigem Abstand und zueinander parallele Befestigungswinkel 2 trägt. An den Befestigungswinkeln 2 sind jeweils sich vertikal nach unten erstreckende, in X-Richtung auslenkbare und als Blattfedern ausgebildete X-Federn 3 angebracht, deren untere Enden an die gegenüberliegenden Seiten eines X-Rahmens aus einer X-Rahmenplatte 4 mit seitlichen Randversteifungen 5 angeschlossen sind.1 includes a fixed base plate 1, which carries two mutually spaced and mutually parallel mounting bracket 2. At the mounting brackets 2 are each vertically downward, deflectable in the X direction and as leaf springs trained X-springs 3 attached, the lower ends of which are connected to the opposite sides of an X-frame from an X-frame plate 4 with lateral edge stiffeners 5.

An die Randversteifungen 5 sind sich vertikal nach oben erstreckende, in Y-Richtung auslenkbare, als Blattfedern ausgebildete Y-Federn 6 angeschlossen, deren obere Enden mit einander gegenüberliegenden Seiten eines rechteckigen Y-Rahmens aus einer Y-Rahmenplatte 7 mit seitlichen Randversteifungen 5 verbunden sind.Connected to the edge stiffeners 5 are vertically upwardly extending Y springs 6, which can be deflected in the Y direction and are designed as leaf springs, the upper ends of which are connected to opposite sides of a rectangular Y frame made of a Y frame plate 7 with lateral edge stiffeners 5 .

Auf der Y-Rahmenplatte 7 ist ein bei dieser Ausführung nicht dargestellter Objektträger für das zu untersuchende Medium angeordnet. An der X-Rahmenplatte 4 und an der Y-Rahmenplatte 7 greifen nicht dargestellte Schwingantriebe an, die aus Permanentmagneten und diesen gegenüberliegend angeordneten Antriebswicklungen bestehen. Insoweit wird auf die in den Figuren 2 und 3 wiedergegebene Ausführung verwiesen. Mit Hilfe der am X-Rahmen angreifenden Schwingantriebe wird dieser X-Rahmen zusammen mit den an ihm angeschlossenen Bauteilen, also auch dem Y-Rahmen und dem Objektträger in X-Richtung in Schwingung versetzt. Zusätzlich wird der Y-Rahmen und auch der Objektträger mit Hilfe des zugeordneten Schwingantriebs in Y-Richtung in Schwingbewegungen versetzt.A slide for the medium to be examined, not shown in this embodiment, is arranged on the Y-frame plate 7. Vibratory drives (not shown), which consist of permanent magnets and drive windings arranged opposite them, act on the X-frame plate 4 and on the Y-frame plate 7. In this regard, reference is made to the embodiment shown in FIGS. 2 and 3. With the help of the vibratory drives acting on the X-frame, this X-frame, together with the components connected to it, ie also the Y-frame and the slide, is set in vibration in the X direction. In addition, the Y frame and also the specimen slide are set to oscillate in the Y direction with the aid of the associated oscillating drive.

Bei der Ausführung nach Fig. 1 ist mit gestrichelten Linien eine Einrichtung zur zweidimensionalen Veränderung der Federkonstanten der X-Federn 3 und der Y-Federn 6 wiedergegeben. Diese Einrichtung besteht aus einem Federstab 8, dessen unteres Ende in einem an der Grundplatte 1 befestigten Flansch 9 angeordnet und dadurch an der X-Rahmenplatte 4 eingespannt ist, und dessen oberes Ende in einem Gelenklager 10 der Y-Rahmenplatte 7 geführt ist. Das untere Ende des Federstabes 8 ist von einer Gewindebuchse 11 umgeben, die eine darauf verstellbare Mutter 12 trägt. Die Mutter 12 weist eine Führung 13 mit geringem Spiel für den Federstab 8 auf.In the embodiment according to FIG. 1, a device for the two-dimensional change of the spring constants of the X-springs 3 and the Y-springs 6 is shown with dashed lines. This device consists of a spring bar 8, the lower end of which in a on the base plate. 1 attached flange 9 is arranged and thereby clamped on the X-frame plate 4, and the upper end is guided in a spherical bearing 10 of the Y-frame plate 7. The lower end of the spring rod 8 is surrounded by a threaded bushing 11 which carries a nut 12 which can be adjusted thereon. The nut 12 has a guide 13 with little play for the spring bar 8.

Während des Betriebes addiert sich die Federkonstante des Federstabes 8 zu den Federkonstanten der X-Federn 3 bzw. der Y-Federn 4. Die gesamten Federkonstanten für X-Richtung bzw. Y-Richtung können zur Einstellung eines Resonanzpunktes durch Verstellen der Mutter 12 verändert werden.During operation, the spring constant of the spring rod 8 is added to the spring constants of the X springs 3 and the Y springs 4. The entire spring constants for the X direction and the Y direction can be changed by adjusting the nut 12 to adjust a resonance point .

Der in den Figuren 2 und 3 wiedergegebene Mischer ist für dreidimensionale Schwingbewegungen ausgelegt. Die X-Rahmenplatte 4 des X-Rahmens ist unterseitig über eine Abstandsleiste 14 mittig an eine als Blattfeder ausgebildete Z-Feder 15 angeschlossen, deren Enden über sich vertikal nach oben erstreckende und in Y-Richtung auslenkbare Federbleche 16 in Gelenken 17 mit sich in X-Richtung erstreckender Gelenkachse schwenkbar gelagert sind. Die Gelenke 17 sind unterseitig an einem Objektträger 18 angebracht und tragen auch eine in Z-Richtung auslenkbare Federplatte 19, die mittig über eine sich in X-Richtung erstreckende Abstandsleiste 20 mit der Oberseite der Y-Rahmenplatte 7 verbunden ist.The mixer shown in FIGS. 2 and 3 is designed for three-dimensional oscillating movements. The X-frame plate 4 of the X-frame is connected on the underside via a spacer bar 14 in the center to a Z-spring 15 designed as a leaf spring, the ends of which via spring plates 16 which extend vertically upwards and can be deflected in the Y-direction in joints 17 with in X. -The direction extending joint axis are pivotally mounted. The joints 17 are attached on the underside to a specimen slide 18 and also carry a spring plate 19 which can be deflected in the Z direction and which is connected in the center to the upper side of the Y frame plate 7 via a spacer bar 20 extending in the X direction.

Zu den Schwingantrieben für die verschiedenen Richtungen gehört jeweils eine Permanentmagnetanordnung 21, die über einen hochpermeablen Rückschluß 2 an der Oberseite der X-Rahmenplatte 4 bzw. an der Unterseite der Y-Rahmenplatte 7 sowie an der Außenseite von den Enden der Z-Feder 15 mit einem Z-Rahmen 23 verbindenden Stegen 24 angeordnet sind.The vibratory drives for the different directions each include a permanent magnet arrangement 21, which has a highly permeable yoke 2 on the top of the X frame plate 4 or on the underside of the Y frame plate 7 and on the outside of the ends of the Z spring 15 with webs 24 connecting a Z frame 23 are arranged.

Zu den Schwingantrieben 15 gehören außerdem Antriebswicklungen 25, die jeweils über einen elektrisch nicht leitenden, hochpermeablen Rückfluß 26 mit zugeordneten Statorträgern 27 verbunden sind, wobei diese Statorträger 27 fest mit einem Gehäuse 28 verbunden sind.The oscillating drives 15 also include drive windings 25, each of which is connected to associated stator carriers 27 via an electrically non-conductive, highly permeable backflow 26, these stator carriers 27 being firmly connected to a housing 28.

Bei der in den Figuren 2 und 3 wiedergegebenen Ausführung ist eine Einrichtung zur Veränderung der Federkonstante in Y-Richtung vorgesehen. Zu der Einrichtung gehört ein mit der X-Rahmenplatte verbundenes Gehäuse 28, welches am unteren Ende einen seitlichen Flansch 29 aufweist, in den der Federstab 8 eingespannt ist, dessen oberes Ende im Gelenklager 10 der Y-Rahmenplatte 7 geführt ist. Im Gehäuse 28 ist eine Spindel 30 gelagert, die mit einem Drehknopf 31 verdreht werden kann. Auf der Spindel 30 ist eine Spindelmutter 32 geführt, die eine sich durch eine Gehäuseöffnung 33 erstreckende Gabel 34 aufweist, in deren Gabelschlitz 35 der Federstab 8 geführt ist. Wie bereits im Zusammenhang mit der Ausführung nach Fig. 1 erläutert, addiert sich die Federkonstante des Federstabs 8 zur Federkonstante der Y-Federn 6 und die gesamte Federkonstante kann durch Verstellen der Gabel 34 verändert werden.In the embodiment shown in FIGS. 2 and 3, a device for changing the spring constant in the Y direction is provided. The device includes a housing 28 which is connected to the X-frame plate and which has a lateral flange 29 at the lower end into which the spring rod 8 is clamped, the upper end of which is guided in the spherical bearing 10 of the Y-frame plate 7. A spindle 30 is mounted in the housing 28 and can be rotated with a rotary knob 31. A spindle nut 32 is guided on the spindle 30 and has a fork 34 extending through a housing opening 33, in the fork slot 35 of which the spring rod 8 is guided. As already explained in connection with the embodiment according to FIG. 1, the spring constant of the spring bar 8 is added to the spring constant of the Y-springs 6 and the entire spring constant can be changed by adjusting the fork 34.

Bei der in den Figuren 2 und 3 wiedergegebenen Ausführung kann auch die Federkonstante in Z-Richtung verändert werden. Dazu ist die in bezug auf die Figuren 4 und 5 beschriebene Einrichtung horizontal ausgerichtet, wobei das Gehäuse 28 auf dem zugeordneten Statorträger 27 für den Z-Antrieb angeordnet ist, während das freie Ende des Federstabes 8 in einem Gelenklager 10 des Steges 24 geführt ist.In the embodiment shown in FIGS. 2 and 3, the spring constant can also be changed in the Z direction. For this purpose, the device described with reference to FIGS. 4 and 5 is aligned horizontally, the housing 28 on the associated stator carrier 27 for the Sterndrive is arranged while the free end of the spring rod 8 is guided in a spherical bearing 10 of the web 24.

Nicht dargestellt ist, daß die Schwingantriebe unabhängig voneinander nach Frequenz, Amplitude und Phase steuer- und/oder regelbar sind. Ferner ist nicht dargestellt, daß eine Einrichtung zum Erfassen der Betriebsparameter der einzelnen Schwingantriebe in Abhängigkeit von der Zeit vorgesehen werden kann.It is not shown that the vibratory drives can be controlled and / or regulated independently of one another according to frequency, amplitude and phase. Furthermore, it is not shown that a device for detecting the operating parameters of the individual vibratory drives can be provided as a function of time.

Der dargestellte Mischer ermöglicht eine berührungslose, gezielte, regelbare und zeitlich beeinflußte Energieeingabe in flüssige, viskose, pastenförmige oder auch granulare Medien und kann zum Dispergierren, Mischen, Entmischen, Sedimentieren und Stofftrennen eingesetzt werden.The mixer shown enables contactless, targeted, controllable and time-influenced energy input into liquid, viscous, pasty or granular media and can be used for dispersing, mixing, segregating, sedimenting and separating materials.

Claims (12)

Mischer mit einem Schwingantrieb für einen beweglich gelagerten Objektträger, dadurch gekennzeichnet, daß der Objektträger (18) an einem horizontal in Y-Richtung beweglichen Y-Rahmen (7, 5) gelagert ist, der mit zumindest einer in Y-Richtung auslenkbaren Y-Feder (6) auf einem horizontal in X-Richtung beweglichen X-Rahmen (4, 5) abgestützt ist, daß der X-Rahmen (4, 5) an zumindest einer in X-Richtung auslenkbaren X-Feder (3) aufgehängt ist, die an einer Grundplatte (1) abgestützt ist, und daß am Y-Rahmen (7, 5) sowie am X-Rahmen (4, 5) Schwingantriebe angreifen, die aus Permanentmagneten (21) und diesen gegenüberliegend angeordneten Antriebswicklungen (25) bestehen.Mixer with an oscillating drive for a movably mounted specimen slide, characterized in that the specimen slide (18) is mounted on a Y frame (7, 5) which can be moved horizontally in the Y direction and which has at least one Y spring which can be deflected in the Y direction (6) on a horizontally movable in the X-direction X-frame (4, 5) that the X-frame (4, 5) is suspended on at least one X-spring deflectable in the X-direction (3), the is supported on a base plate (1), and that vibrating drives act on the Y-frame (7, 5) and on the X-frame (4, 5), which consist of permanent magnets (21) and drive windings (25) arranged opposite them. Mischer nach Anspruch 1, dadurch gekennzeichnet, daß die Y-Federn (6) und die X-Federn (3) als Blattfedern ausgebildet sind.Mixer according to claim 1, characterized in that the Y-springs (6) and the X-springs (3) are designed as leaf springs. Mischer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Y-Rahmen (7, 5) und der X-Rahmen (4, 5) einen rechteckigen bis quadratischen Grundriß aufweisen und daS ihre zugeordneten Blattfedern jeweils an einander gegenüberliegende Seiten der Rahmen angeschlossen sind.Mixer according to claim 1 or 2, characterized in that the Y-frame (7, 5) and the X-frame (4, 5) have a rectangular to square outline and that their associated leaf springs are each connected to opposite sides of the frame . Mischer nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der X-Rahmen (4, 5) auf zumindest einer in Z-Richtung auslenkbaren Z-Feder (15) abgestützt ist, die an einen in Z-Richtung beweglichen Z-Rahmen (23) angeschlossen ist, und daß am Z-Rahmen (23) zumindest ein Schwingantrieb angreift.Mixer according to one of claims 1 to 3, characterized in that that the X frame (4, 5) is supported on at least one Z spring (15) which can be deflected in the Z direction and is connected to a Z frame (23) movable in the Z direction, and that on the Z frame (23) attacks at least one vibratory drive. Mischer nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Objektträger (18) über Scharniere (17) mit sich in X-Richtung erstreckende Scharnierachse an eine in Z-Richtung auslenkbare, mit dem Y-Rahmen (7, 5) verbundene Federplatte (19) angeschlossen ist, und daß diese Scharniere (17) und auch der Z-Rahmen (23) über in Y-Richtung auslenkbare Federbleche (16) angeschlossen ist.Mixer according to one of Claims 1 to 4, characterized in that the specimen slide (18) is connected via hinges (17) with a hinge axis extending in the X direction to a Y frame (7, 5) which can be deflected in the Z direction Spring plate (19) is connected, and that these hinges (17) and also the Z frame (23) are connected via spring plates (16) which can be deflected in the Y direction. Mischer nach einem der Ansprüche 1 bis 5, gekennzeichnet durch zumindest eine Einrichtung zur zweidimensionalen Veränderung der Federkonstante aus einem einseitig eingespannten Federstab (8) und einer längs des Federstabes (8) verstellbaren Masse (12 bzw. 34).Mixer according to one of claims 1 to 5, characterized by at least one device for two-dimensionally changing the spring constant from a spring bar (8) clamped on one side and a mass (12 or 34) adjustable along the spring bar (8). Mischer nach einem der Ansprüche 1 bis 5, gekennzeichnet durch zumindest eine Einrichtung zur eindimensionalen Veränderung der Federkonstante aus einem einseitig eingespannten Federstab (8) oder aus einer einseitig eingespannten Blattfeder, der bzw. die in einer parallel dazu verstellbaren Gabel (34) geführt ist, wobei die Gabel (34) in einem neben dem Federstab (8) bzw. der Blattfeder angeordneten Gehäuse (28) geführt und mit einem Stelltrieb, insbesondere Spindeltrieb (30, 32) verstellbar ist.Mixer according to one of claims 1 to 5, characterized by at least one device for one-dimensionally changing the spring constant from a spring rod (8) clamped on one side or from a leaf spring clamped on one side, which is guided in a fork (34) which can be adjusted parallel to it, the fork (34) being guided in a housing (28) arranged next to the spring bar (8) or the leaf spring and being adjustable with an actuating drive, in particular a spindle drive (30, 32). Mischer nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß eine Einrichtung zur eindimensionalen Veränderung der Federkonstante an zumindest einer X-Feder (3) des X-Rahmens (4, 5) angreift.Mixer according to one of claims 1 to 7, characterized in that a device for one-dimensional Changing the spring constant acts on at least one X-spring (3) of the X-frame (4, 5). Mischer nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß zwischen dem X-Rahmen (4, 5) bzw. dem Y-Rahmen (7, 5) und einer Grundplatte (1) eine Einrichtung zur Veränderung der Federkonstante angeordnet ist, wobei der Federstab (8) in einem Gelenklager (10) des Y-Rahmens (7, 5) geführt ist.Mixer according to one of claims 1 to 8, characterized in that a device for changing the spring constant is arranged between the X frame (4, 5) or the Y frame (7, 5) and a base plate (1), wherein the spring rod (8) is guided in a spherical bearing (10) of the Y-frame (7, 5). Mischer nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß zwischen dem Z-Rahmen (23) und einer Grundplatte (1) eine Einrichtung zur Veränderung der Federkonstante angeordnet ist, wobei der sich horizontal erstreckende Federstab (8) an der Grundplatte (1) oder einem damit verbundenen Bauteil eingespannt und in einem Gelenklager (10) des Z-Rahmens (23) geführt ist.Mixer according to one of claims 1 to 9, characterized in that a device for changing the spring constant is arranged between the Z-frame (23) and a base plate (1), the horizontally extending spring bar (8) on the base plate (1 ) or a component connected to it and clamped in a spherical bearing (10) of the Z-frame (23). Mischer nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Schwingantriebe unabhängig voneinander nach Frequenz, Amplitude und Phase steuer- und/oder regelbar sind.Mixer according to one of claims 1 to 10, characterized in that the oscillating drives can be controlled and / or regulated independently of one another according to frequency, amplitude and phase. Mischer nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß eine Einrichtung zum Erfassen der Betriebsparameter der einzelnen Schwingantriebe in Abhängigkeit von der Zeit vorgesehen ist.Mixer according to one of claims 1 to 11, characterized in that a device is provided for detecting the operating parameters of the individual vibratory drives as a function of time.
EP94107256A 1993-05-22 1994-05-10 Mixer with vibratory drive Expired - Lifetime EP0626194B1 (en)

Applications Claiming Priority (2)

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DE9307761U 1993-05-22
DE9307761U DE9307761U1 (en) 1993-05-22 1993-05-22 Mixer with a vibratory drive

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EP0626194B1 EP0626194B1 (en) 1998-03-11

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JP (1) JPH07136486A (en)
AT (1) ATE163869T1 (en)
CA (1) CA2124023A1 (en)
DE (2) DE9307761U1 (en)
DK (1) DK0626194T3 (en)
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ES2113572T3 (en) 1998-05-01
EP0626194B1 (en) 1998-03-11
DK0626194T3 (en) 1998-09-28
ATE163869T1 (en) 1998-03-15
JPH07136486A (en) 1995-05-30
CA2124023A1 (en) 1994-11-23
GR3026340T3 (en) 1998-06-30
DE9307761U1 (en) 1993-08-19
US5427451A (en) 1995-06-27
DE59405411D1 (en) 1998-04-16

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