EP1117485B1 - Unwuchtsaugleichsvorrichtung für zentrifugen - Google Patents
Unwuchtsaugleichsvorrichtung für zentrifugen Download PDFInfo
- Publication number
- EP1117485B1 EP1117485B1 EP00956379A EP00956379A EP1117485B1 EP 1117485 B1 EP1117485 B1 EP 1117485B1 EP 00956379 A EP00956379 A EP 00956379A EP 00956379 A EP00956379 A EP 00956379A EP 1117485 B1 EP1117485 B1 EP 1117485B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ring
- rotor
- centrifuge
- elastomer
- constructed
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
- B04B9/14—Balancing rotary bowls ; Schrappers
Definitions
- the invention relates to a centrifuge mentioned in the preamble of claim 1 Art.
- Such a device causes an imbalance of the rotor, for example is generated by asymmetrical loading, an unbalance compensation by that the mass-compensating ring during the rotation of the Rotor with yielding bearing device opposite to the unbalanced mass shifts and thereby compensates for the unbalance.
- a centrifuge is known from US-A-3796109, in which in a separate Housing rings arranged concentrically to the shaft are loosely mounted so that they can tilt to compensate for unbalance. This training also requires one Special construction with considerable effort.
- DE-A-19749357 shows an unbalance compensation device for centrifuges with balls running freely in a ring path concentrically around the shaft move freely for balancing. This construction is used at Centrifuges, especially laboratory centrifuges, are often used, but are limited high-precision production and consequently results in very high costs.
- Torsionsschwingungsbehimmpfung Torsional vibration dampers are, for example provided on almost every motor vehicle engine on the crankshaft suppress the jerking, especially at low speeds. at Torsional vibration dampers basically depend on a mass ring keep torsionally sprung against the shaft, whereby radial leads to unbalance Shifts should be avoided if possible.
- EP-A-653579 shows a torsional vibration damper in which the ground ring with the rotor either via an elastomer ring or via its screw axis Coil springs arranged concentrically to the shaft and supported at the ends is connected torsionally.
- US-A-4395809 also shows a torsional vibration damper in which the the compensating ring forming the vibration mass via an elastomer ring an inner seat ring is mounted torsionally, the seat ring for assembly on the torsion damper shaft.
- the elastomer ring is between the outer and inner ring with radial preload fitted around torsional vibrations, but not allow any radial movement if possible.
- a generic centrifuge is known from DE 4239504 A1. At this the bearing device has a plurality of spaced, radially acting Springs up. However, this construction has significant disadvantages.
- the radially acting spring force of the bearing device is different Circumferential angle varies depending on how far the circumferential angle of neighboring feathers away. This results in uneven Imbalance compensation disturbing conditions. Furthermore, the individually trained Springs are difficult to adjust to the same spring force, which also leads to malfunctions of the unbalance compensation. Furthermore, those in the known Construction provided undamped springs of the bearing device oscillatory system, which is a source of additional undesirable resonances is. Furthermore, the known storage device is essentially only in the plane the storage facility and not effective against tilt deflections. Finally is the known construction is also very complex to manufacture.
- the known device is only for low unbalance requirements suitable at low speeds, such as that in the cited document illustrated case of a washing machine. It is only for high-speed centrifuges very badly suited.
- the object of the present invention is the generic centrifuge training to save costs for higher balancing requirements.
- the centrifuge according to the invention sees an elastic storage device Ring in front.
- the compensation ring for example a steel ring suitable mass
- an elastic ring in the form of a rubber layer attached to the surface of the rotor.
- the ring-shaped one which can be formed symmetrically on all sides, is advantageous Shape of the elastic ring, which is the same at all circumferential angles (Isotropic) elastic properties.
- Such an elastic ring leaves train well damping. Then resonance frequencies do not occur, so that no additional resonances are formed in the vibration system of the centrifuge become.
- the elastic ring can withstand restoring forces very well also in the tilting direction of the rotor axis in relation to the compensating ring generate and thus also compensate for tilting movements very well. It is hereby Imbalance compensation is easily created in several degrees of freedom.
- the device according to the invention is therefore at low cost and because of it simple construction, especially retrofittable for all centrifuges Type, especially for very high-speed centrifuges such as laboratory centrifuges, suitable.
- the device can on different concentric surfaces of the rotor be attachable, for example on the for receiving the centrifuged material provided rotor container.
- the device can, for example, on a concentric outer surface of the rotor on the circumference of the rotor container or particularly advantageous when attached be provided on the outside of the shaft. It is advantageous however according to claim 3 on a concentric inner surface, in particular an inner surface of the rotor container, which is particularly space-saving Construction leads.
- the elastic ring is advantageously designed as an elastomer ring. Suitable elastomers, such as natural rubber or a synthetic one Elastomer can be used. Uniformity is particularly advantageous here Spring action in all directions and the good internal damping of the material.
- the elastomer ring can be formed in one piece, but is advantageously according to Claim 5 built up in multiple layers. These layers can pass through vertically planes facing the axis can be separated or in particular also as concentric Layers can be arranged one above the other in the radial direction. By the Multi-layer structure with different elastomer parameters of the layers the resetting and damping properties of the elastomer ring can be optimized.
- a seat ring is provided, for example made of metal exists and allows a proper metal to metal attachment of the device.
- the compensation ring preferably made of metal, the elastic ring and an optionally provided seat ring can be loosely inserted into one another and held together by additional devices. They are advantageous however, according to claim 7 firmly connected to one another, what the assemblability and functional reliability improved.
- the elastomer ring according to claim 8 preferably consists entirely or partially, for example in one of several layers of an elastomer foam, the due to its special elasticity, a further optimization of the Resetting and damping behavior of the elastomer ring enables.
- the elastic ring as an obliquely wound is advantageous Coil spring formed.
- similar radial can be achieve elastic properties as with an elastomer ring, but with the Advantages, e.g. better temperature resistance and chemical resistance.
- Good internal damping can also be achieved here through friction damping due to the multiple Attachment of the screw turns can be achieved.
- Fig. 1 is a laboratory centrifuge of a conventional design with the outer omitted Protective housing shown.
- a drive motor 3 is spring-mounted on a base plate 1 with springs 2 arranged, which drives the vertical shaft 4 of a rotor, which from the shaft 4 and a rotor container 5.
- the rotor container 5 has a plurality of receptacles 6 which are to be centrifuged for receiving Serve sample tubes 7.
- Fig. 1 is - to explain an unbalance - Shown that only in one of the two are opposite in the cutting plane Recordings 6 is a sample tube 7, while the opposite Recording 6 is empty. This creates a significant imbalance that must be compensated is.
- An imbalance compensation device I is on shaft 4 for balancing provided that a compensation ring 8 and an elastic ring in the form an elastomer ring 9.
- this device I is shown again in FIG. 2 on an enlarged scale.
- the elastomer ring 9 which is made of any suitable natural or synthetic elastomer can exist, a radial displacement of the with a suitable mass, for example made of steel compensation ring 8 opposite the shaft 4. Also tilting movements of the shaft 4 opposite the level of the compensating ring 8 are compensated in the elastomer ring 9.
- the elastomer ring 9 can have customary elastomer properties, in particular not only has a resilient effect but also has a substantial damping effect.
- Fig. 1 shows that an unbalance compensation device with elastomer ring 9 and Compensation ring 8 for attachment to different positions of the rotor can be trained.
- a compensation device II can be provided on the circumference of the rotor container 5 his.
- a compensation device III can on the lower end face of the Rotor container 5 may be provided, with the special feature that here the elastomer ring is claimed for shear. Is particularly advantageous in the illustrated Formation of the rotor container 5 with a lower recess with a cylindrical Inner surface 10 a compensation device IV arranged on this, then the compensating ring 8 inside and the elastomer ring 9 outside to the inner surface 10 of the rotor container 5 is out.
- a compensation device V can also, as shown in Figure 1, on the motor 3 projecting downwards End of the shaft 4 are arranged.
- a compensation device VI can also be located within the rotor container 5 be arranged on a cylindrical inner surface 10 '.
- the compensating ring 8 ' can also be designed as a solid disk his.
- a construction is shown with the compensating ring 8 and elastomer ring 9 - except for other dimensions - corresponds to the construction of FIG. 2.
- a z. B. made of steel existing seat ring 11 is provided, which is designed to fit snugly on the shaft 4 is.
- FIG. 4 corresponds to that of FIG. 3, except for the fact that the elastomer ring consists of two concentric layers 9 ', 9 ", which different elastomer materials exist and, for example, different Have spring or damping properties. This can compensate of the elastomer ring 9 ', 9 "can be optimized.
- Fig. 5 shows a variant of the construction shown in Fig. 3, in which the Compensation ring 8 is arranged enclosed on all sides in the elastomer ring 9. This allows both the balancing properties and the manufacturability and fatigue strength can be improved.
- the parts 8, 9, 11 in particular be firmly connected to each other, for. B. by Gluing or vulcanization in order to protect against displacement and Easy to handle construction during assembly.
- the elastomer ring 9 can be made of non-porous Elastomer material consist, but in particular also of an elastomer foam, its special spring and damping properties are advantageous here are usable.
- the elastomer ring 9 is rectangular in the versions shown Cross-sectional shape shown. Its radial thickness and its axial direction the thickness of the shaft 4 extends the desired balancing parameters be adapted, especially with regard to the ratio of radial elasticity to tipping elasticity.
- the cross-sectional geometry can advantageously also be designed differently, e.g. B. with spherical curvature of the end faces of the elastomer ring or with hollow surfaces, as the elastomer ring 9 'of the balancing device VI shows to its Adjust elasticity properties in the desired way.
- the elastomer ring can also be used for example with circumferentially distributed cavities or openings, if the arrangement of the elastic properties to be kept as isotropic at all angles as possible not be affected too much.
- Figures 6 and 7 show another in a different sectional view Embodiment of an unbalance compensation device, e.g. in position I according to Figure 1 can be arranged on the shaft 4, in a corresponding constructive Modification also for the other attachment positions II to IV according to Figure 1 is suitable.
- the elastic ring is not as Elastomer ring formed, but as a ring-shaped coil spring 19. This is on the one hand in a circumferential outer groove 16 of the seat ring 11 and on the other hand, in a circumferential inner groove 17 of the compensating ring 8, so that the unbalance compensation device is a positively connected assembly unit forms.
- the cross-sectional shapes of the grooves 16 and 17 are as in FIG. 6 shows the cross-sectional circumferential shape of the coil spring 19 adapted.
- the individual turns would stand essentially radially in the view of FIG.
- the schematically illustrated coil spring 19 which can be used for the present purposes are individual turns, however, as shown in Figure 7, at an oblique angle ⁇ tilted relative to the radial direction shown in dash-dotted lines.
- the coil spring 19 can yield elastically in the radial direction, similarly as the elastomer ring used in the embodiments of Figures 1 to 5 9.
- tilting movements of the shaft 4 in relation to the compensating ring 8 can compensate the coil spring 19 elastically.
- the coil spring 19 can be made of suitable spring materials, e.g. Spring steel, consist. Unlike that in the embodiments of FIGS. 1 to 5 used elastomer ring 9, the spring ring 19 and thus the entire unbalance compensation device 11, 19, 8 e.g. high temperature resistant and resistant to Be solvent.
Landscapes
- Centrifugal Separators (AREA)
- Testing Of Balance (AREA)
Description
- Fig. 1
- Einen Schnitt durch eine Laborzentrifuge mit mehreren Unwuchtausgleichsvorrichtungen mit Elastomerring,
- Fig. 2
- im Schnitt nach Linie 2-2 in Fig. 1 einer der dargestellten Unwuchtausgleichsvorrichtungen in Achsansicht,
- Fig. 3
- in Darstellung gemäß Fig. 2 eine Variante der Unwuchtausgleichsvorrichtung,
- Fig. 4
- in Darstellung gemäß Fig. 2 eine weiter Variante der Unwuchtausgleichsvorrichtung,
- Fig. 5
- im Schnitt der Fig. 1 eine weiter Variante der Unwuchtausgleichsvorrichtung,
- Fig. 6, 7
- in unterschiedlichen Schnittdarstellungen eine auf der Welle der Zentrifuge angeordnete Unwuchtausgleichsvorrichtung mit einer Schraubenfeder als elastischer Ring.
Claims (9)
- Zentrifuge mit einer Vorrichtung zum selbsttätigen Unwuchtausgleich des Rotors (4, 5), mit einem über eine elastische Lagereinrichtung (9, 19) an einer konzentrischen Fläche des Rotors in Ruhestellung konzentrisch lagerbaren, massebehafteten Ausgleichsring (8), welcher sich während der Rotation entgegengesetzt zur Unwuchtmasse verschiebt, dadurch gekennzeichnet, daß die Lagereinrichtung als wenigstens radial nachgiebiger elastischer Ring (9, 19) ausgebildet ist.
- Zentrifuge nach Anspruch 1 mit eine Antriebswelle (4) aufweisendem Rotor (4, 5), dadurch gekennzeichnet, daß die Vorrichtung (8, 9) zur Anbringung auf der Außenfläche der Welle (4) ausgebildet ist.
- Zentrifuge nach Anspruch 1 mit eine Antriebswelle (4) aufweisendem Rotor (4, 5), dadurch gekennzeichnet, daß die Vorrichtung (8, 9) zur Anbringung auf einer konzentrischen Innenfläche (10) des Rotors (4, 5) ausgebildet ist.
- Zentrifuge nach Anspruch 1, dadurch gekennzeichnet, daß der elastische Ring als Elastomerring (9) ausgebildet ist
- Zentrifuge nach Anspruch 4, dadurch gekennzeichnet, daß der Elastomerring aus mehreren Schichten (9', 9") mit unterschiedlichen Elastomereigenschaften ausgebildet ist.
- Zentrifugenach Anspruch 1, dadurch gekennzeichnet, daß auf der zur Fläche des Rotors (4, 5) gelegenen Seite des elastischen Ringes (9,19) ein zur Anbringung auf der Fläche des Rotors ausgebildeter Sitzring (11) vorgesehen ist.
- Zentrifuge nach Anspruch 1, dadurch gekennzeichnet, daß die Teile (8, 9, 11; 8, 19, 11) der Vorrichtung fest miteinander verbunden sind.
- Zentrifuge nach Anspruch 4, dadurch gekennzeichnet, daß der Elastomerring (9; 9', 9") wenigstens teilweise aus einem Elastomerschaum besteht.
- Zentrifuge nach Anspruch 1, dadurch gekennzeichnet, daß der elastische Ring als ringförmige Schraubenfeder (19) mit schräg zur Radialrichtung stehenden Windungen ausgebildet ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19936452 | 1999-08-03 | ||
DE19936452 | 1999-08-03 | ||
PCT/EP2000/007495 WO2001008807A1 (de) | 1999-08-03 | 2000-08-02 | Unwuchtausgleichsvorrichtung für zentrifugen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1117485A1 EP1117485A1 (de) | 2001-07-25 |
EP1117485B1 true EP1117485B1 (de) | 2003-02-05 |
Family
ID=7916983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00956379A Expired - Lifetime EP1117485B1 (de) | 1999-08-03 | 2000-08-02 | Unwuchtsaugleichsvorrichtung für zentrifugen |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1117485B1 (de) |
JP (1) | JP2004504923A (de) |
AT (1) | ATE232141T1 (de) |
DE (2) | DE50001202D1 (de) |
WO (1) | WO2001008807A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10125808A1 (de) * | 2001-05-26 | 2002-12-12 | Westfalia Separator Food Tec G | Zentrifugalseparator |
ATE552909T1 (de) | 2002-08-02 | 2012-04-15 | Harvest Technologies Corp | Dekantierzentrifuge mit vibrationsisolierung |
DE102005018041B3 (de) * | 2005-04-19 | 2007-01-04 | Hanning Elektro-Werke Gmbh & Co. Kg | Antriebseinrichtung für eine Laborzentrifuge |
US7999940B2 (en) | 2006-06-30 | 2011-08-16 | Asml Netherlands B.V. | Apparatus for angular-resolved spectroscopic lithography characterization |
DE102007010616A1 (de) * | 2007-03-02 | 2008-09-04 | Eppendorf Ag | Mehrplatz-Vorrichtung zum Mischen von Laborgefäß-Inhalten |
SE533089C2 (sv) | 2008-05-13 | 2010-06-22 | Alfa Laval Corp Ab | Centrifugalseparator |
DE102014102472B4 (de) * | 2014-02-25 | 2021-04-22 | Andreas Hettich Gmbh & Co. Kg | Zentrifuge |
CN109470410A (zh) * | 2019-01-14 | 2019-03-15 | 北京航空航天大学 | 对称配重行星轮系动平衡调整装置 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7006072A (de) * | 1970-04-27 | 1971-10-29 | ||
US3692236A (en) * | 1970-10-30 | 1972-09-19 | Technicon Instr | Self-balancing centrifuge method and apparatus |
JPS4847672U (de) * | 1971-10-06 | 1973-06-22 | ||
JPS5546156Y2 (de) * | 1976-04-30 | 1980-10-29 | ||
DE2640751C2 (de) * | 1976-09-10 | 1984-11-08 | Dirk Dr.-Ing. 8520 Erlangen Forkel | Drehschwingungsdämpfer |
GB2068503B (en) * | 1980-01-25 | 1983-07-06 | Concentric Pumps Ltd | Vibration dampers |
SE445665B (sv) * | 1984-11-28 | 1986-07-07 | Alfa Laval Separation Ab | Centrifugalseparator med ett holje avtetat medelst en mekanisk tetning |
JPS6295157A (ja) * | 1985-10-18 | 1987-05-01 | Hitachi Koki Co Ltd | オ−トバランス遠心分離機の防振装置 |
JPH0231626Y2 (de) * | 1985-12-25 | 1990-08-27 | ||
JPH01172650A (ja) * | 1987-12-26 | 1989-07-07 | Bridgestone Corp | トーショナルダンパー |
JPH04266798A (ja) * | 1991-02-22 | 1992-09-22 | Hitachi Ltd | 洗濯乾燥機 |
JPH0718203Y2 (ja) * | 1992-07-17 | 1995-04-26 | 岩崎通信機株式会社 | 電話機の停電対策回路 |
JPH07683A (ja) * | 1993-04-12 | 1995-01-06 | Hatsumi Tokuragawa | 洗濯物取出し装置 |
JP2872011B2 (ja) * | 1993-09-01 | 1999-03-17 | 日本電気株式会社 | Atm通信システムにおける送信データの現用予備両系バイト位相合せ装置 |
EP0653579A1 (de) * | 1993-11-16 | 1995-05-17 | DIEHL GMBH & CO. | Drehschwingungstilger für Kurbelwellen |
DE19749357C2 (de) * | 1996-11-08 | 2001-04-19 | Hitachi Koki Kk | Verbesserte Konstruktion einer automatischen Ausgleichsvorrichtung für eine rotierende Maschine |
-
2000
- 2000-08-02 DE DE50001202T patent/DE50001202D1/de not_active Expired - Lifetime
- 2000-08-02 AT AT00956379T patent/ATE232141T1/de not_active IP Right Cessation
- 2000-08-02 DE DE10038060A patent/DE10038060A1/de not_active Withdrawn
- 2000-08-02 EP EP00956379A patent/EP1117485B1/de not_active Expired - Lifetime
- 2000-08-02 WO PCT/EP2000/007495 patent/WO2001008807A1/de active IP Right Grant
- 2000-08-02 JP JP2001513524A patent/JP2004504923A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
EP1117485A1 (de) | 2001-07-25 |
DE50001202D1 (de) | 2003-03-13 |
WO2001008807A8 (de) | 2001-04-05 |
DE10038060A1 (de) | 2001-05-03 |
ATE232141T1 (de) | 2003-02-15 |
WO2001008807A1 (de) | 2001-02-08 |
JP2004504923A (ja) | 2004-02-19 |
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