EP1329263A1 - Rotor mit Behälteraufnahmen für zu zentrifugierende Produkte und entsprechende Zentrifuge - Google Patents

Rotor mit Behälteraufnahmen für zu zentrifugierende Produkte und entsprechende Zentrifuge Download PDF

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Publication number
EP1329263A1
EP1329263A1 EP03290034A EP03290034A EP1329263A1 EP 1329263 A1 EP1329263 A1 EP 1329263A1 EP 03290034 A EP03290034 A EP 03290034A EP 03290034 A EP03290034 A EP 03290034A EP 1329263 A1 EP1329263 A1 EP 1329263A1
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EP
European Patent Office
Prior art keywords
rotation
axis
geometric
rotor
housing
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.)
Granted
Application number
EP03290034A
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English (en)
French (fr)
Other versions
EP1329263B1 (de
EP1329263B2 (de
Inventor
Jean Louis Fondin
Jérôme Beaucour
Serge Papin
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.)
Jouan SA
Original Assignee
Jouan SA
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Publication date
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Application filed by Jouan SA filed Critical Jouan SA
Priority to DE60301735.5T priority Critical patent/DE60301735T3/de
Publication of EP1329263A1 publication Critical patent/EP1329263A1/de
Publication of EP1329263B1 publication Critical patent/EP1329263B1/de
Application granted granted Critical
Publication of EP1329263B2 publication Critical patent/EP1329263B2/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/04—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers
    • B04B5/0407—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles
    • B04B5/0414—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles comprising test tubes

Definitions

  • the present invention relates to a rotor of the type intended to be driven in rotation about a central axis of rotation and in which a number n of housings for receiving a product to be centrifuged are provided, the housings being eccentric relative to the rotation axis.
  • the invention applies, for example, to the centrifugation of products organic.
  • housings For centrifugation of such products, generally used tapered rotors in which the housings have been formed in the form of recesses. These housings have elongated shapes and are, for each rotor, regularly distributed around its axis of rotation. These housings are intended to receive, for example, tubes containing the products to be centrifuged and closed with caps.
  • a centrifuge using such a rotor generally comprises a tank, provided with refrigeration means and in which the rotor is mounted on a rotating drive head.
  • An object of the invention is to solve this problem by limiting the noise pollution caused by rotating rotors of the type supra.
  • the subject of the invention is a rotor of the aforementioned type, characterized in that the geometric image of at least one first housing, by a geometric rotation around the axis of rotation in a first direction of rotation and angle 360 ° / n , is distinct from a second housing which directly follows the first housing in the first direction of rotation.
  • the invention further relates to a centrifuge comprising a tank, a rotor intended to be placed in the tank, and means rotor rotation drive, characterized in that the rotor is a rotor as defined above.
  • FIGS 1 and 2 schematically illustrate a centrifuge 1 which comprises a tank 2, a rotor 3 disposed in the tank 2, and means 4 for rotating the rotor 3 around an axis of rotation A substantially vertical.
  • the tank 2 comprises a movable access door 6 and means for refrigerating its interior atmosphere, which means are not shown in the figures.
  • the rotor 3 is a generally frustoconical rotor with a central axis A. It is equipped with a removable closure cover 7. Cover 7 has not been shown in figure 2.
  • the rotor 3 is for example made of metal and four housings offset from the axis A are formed there, namely a first pair of housings 8 1 and 8 2 and a second pair of housings 10 1 and 10 2 . It will be noted that the housings 10 1 and 10 2 are not shown in FIG. 1.
  • the housings 8 1 and 8 2 of the first pair are symmetrical to each other with respect to the axis A.
  • the housings 10 1 and 10 2 of the second pair are symmetrical to each other with respect to to axis A.
  • the housings 8 1 , 8 2 , 10 1 and 10 2 have a similar shape elongated along a respective longitudinal direction D.
  • each direction D is inclined relative to the axis of rotation A and cuts it at a geometric point located above the rotor 3 and its cover 7 .
  • the housings 8 1 , 8 2 , 10 1 and 10 2 open into the upper surface 12 of the rotor to allow, when the cover 7 is removed, to introduce into the housings containers containing the product or products to be centrifuged, for example tubes closed by caps.
  • the distribution of the housings 8 1 , 8 2 , 10 1 and 10 2 around the axis of rotation A is irregular.
  • the rotor 3 would be invariant by a geometric rotation of axis A and angle equal to 90 ° ( ⁇ / 2 rad).
  • the geometric image I (in double-dashed dashed line) of the housing 8 1 by such a rotation in a first direction S 1 would be confused with the housing 10 1 , housing which directly follows the housing 8 1 in this direction S 1 .
  • the housing 10 1 is not confused with this image I but is, in top view, angularly offset from this image I by a non-zero angle ⁇ centered on the axis A and negative with respect to the direction S 1 .
  • the housing 10 1 is the image, by a geometric rotation of axis A and of angle ⁇ , of the image I.
  • the longitudinal directions D of the housings 10 1 and of the image I form a top view of an angle ⁇ centered on the axis A and negative when considering the direction S 1 .
  • the angle ⁇ is for example 4 ° and can be understood more generally between 2 ° and 10 °.
  • the housing 10 2 is angularly offset, in plan view, from the image not shown of the housing 8 2 by the aforementioned rotation.
  • the housings 8 1 , 8 2 , 10 1 and 102 are invariant by a geometric rotation of axis A and of angle equal to 180 ° ( ⁇ rad) but not by a rotation of axis A and of angle equal to 90 ° ( ⁇ / 2 rad) as in the state of the art.
  • the reason for this reduction or elimination of noise pollution may be as follows.
  • the zones Z ( Figure 1) of the outer lateral surface 14 of the rotor 3 located radially opposite the housings 8 1 , 8 2 , 10 1 and 10 2 deform, under the effect of the centrifugal force, radially outward more strongly than the areas of the outer lateral surface 14 located between the housings.
  • the reliefs thus created on the surface 14 are, like the housings 8 1 , 8 2 , 10 1 and 10 2 , invariant by a geometric rotation of axis A and of angle equal to 180 ° ( ⁇ rad), and not by a geometric rotation of axis A and angle equal to 90 ° as in the state of the art.
  • the frequencies and intensities of the acoustic waves created during the rotational drive of the rotor are modified and the noise pollution reduced, or even eliminated.
  • the angle ⁇ can be positive with respect to the direction S 1 .
  • the housing 10 1 is viewed from above laterally translated, with respect to the image I of the housing 8 1 , opposite the direction S 1 of a distance d not nothing.
  • the longitudinal directions D of the housing 10 1 and of the image I of the housing 8 1 are substantially parallel and spaced laterally from one another.
  • the distance d is for example 2mm and can more generally be between 1 and 5mm.
  • the housing 10 1 can be, in top view, offset laterally from the image I of the housing 8 1 in the direction S 1 .
  • the housing 10 1 can be, in top view, resulting from a geometric translation of the image I, the direction of this translation not necessarily being orthogonal to the direction D of the image I.
  • the housing 10 1 can be deduced from the image I of the housing 8 1 by a geometric transformation in a radial plane containing the axis of rotation A and the longitudinal direction D of the image I.
  • FIGS. 4 and 5 illustrate a third embodiment in which the longitudinal direction D of the housing 10 1 is angularly offset by a non-zero angle ⁇ relative to the longitudinal direction D of the image I in the above-mentioned plane P ( figure 4).
  • This plane P also contains the direction D of the housing 10 1 and corresponds to the right half-plane of FIG. 5.
  • the housing 10 1 is the image, by a geometric rotation of angle ⁇ in the plane P, of the image I.
  • angle ⁇ can be positive or negative.
  • This angle ⁇ a by example a value of 4 ° and can be more generally between 2 ° and 10 °.
  • FIG. 6 illustrates another embodiment in which the housing 10 1 is obtained from image I by geometric translation of a substantially constant distance ⁇ not zero in the radial plane P.
  • the directions D of the housing 10 1 and of image I are substantially parallel and spaced from each other.
  • the aforementioned translation can be such that the housing 10 1 is closer or more distant from the outer lateral surface 14 than the image I.
  • the angle ⁇ or the distance ⁇ are sufficiently small so that on the one hand the homogeneity of the centrifugation treatment undergone by products received in the housings 8 1 , 8 2 , 10 1 and 10 2 is satisfactory and on the other hand the unbalances are reduced.
  • FIG. 7 illustrates yet another embodiment where the housing 10 1 is the image by a geometric transformation of the image I, this geometric transformation comprising a geometric rotation and a geometric translation in the plane of FIG. 7 which is orthogonal to the axis of rotation A.
  • the rotation is a rotation of axis A and of angle ⁇ .
  • the translation is a translation in the plane of Figure 7 of a non-zero distance d in a direction which is not orthogonal to the direction D of image I.
  • the combination of rotation and translation within the geometric transformation allows the housing 10 1 to remain sufficiently close to image I to limit the differences between the centrifugation force undergone by a product contained in the housing 10 1 and the centrifugation force of a product received in the housing 8 1 .
  • FIG. 8 illustrates another embodiment in which the housing 10 1 is obtained from image I by a geometric transformation comprising a geometric rotation and a geometric translation in the radial plane P which comprises the axis of rotation A and the longitudinal direction D of image I.
  • the rotation is a non-zero angle ⁇ rotation and the translation a translation of a non-zero distance ⁇ in one direction orthogonal to axis A.
  • the combination of a translation and a rotation makes it possible to increase the homogeneity of the centrifugation treatment undergone by products received in the housings 8 1 , 8 2 , 10 1 and 10 2 , to limit unbalances and to reduce aesthetic inconvenience.
  • the geometric transformation between the image I and the housing 10 1 may comprise a translation and / or a rotation in a plane orthogonal to the axis of rotation A, and a translation and / or a rotation in a radial plane containing axis A.
  • translations and rotations described previously can be applied, for example separately each to a respective pair of dwellings when the number of dwellings is even and strictly greater than 4.
  • the housings are symmetrical in pairs with respect to the axis A.
  • the rotor 3 when the rotor 3 is provided with an even number n of housings, the rotor 3 will be invariant by a geometric rotation of axis A and of 180 ° angle which limits imbalances. More generally, an invariance by a geometric rotation of axis A and an angle strictly greater than 360 ° / n will make it possible to limit the imbalances.

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  • Centrifugal Separators (AREA)
EP03290034.2A 2002-01-09 2003-01-07 Rotor mit Behälteraufnahmen für zu zentrifugierende Produkte und entsprechende Zentrifuge Expired - Lifetime EP1329263B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE60301735.5T DE60301735T3 (de) 2002-01-09 2003-01-07 Rotor mit Behälteraufnahmen für zu zentrifugierende Produkte und entsprechende Zentrifuge

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0200219 2002-01-09
FR0200219A FR2834479B1 (fr) 2002-01-09 2002-01-09 Rotor a disposition amelioree de logements de reception de produits a centrifuger et centrifugeuse correspondante

Publications (3)

Publication Number Publication Date
EP1329263A1 true EP1329263A1 (de) 2003-07-23
EP1329263B1 EP1329263B1 (de) 2005-10-05
EP1329263B2 EP1329263B2 (de) 2014-07-30

Family

ID=8871212

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03290034.2A Expired - Lifetime EP1329263B2 (de) 2002-01-09 2003-01-07 Rotor mit Behälteraufnahmen für zu zentrifugierende Produkte und entsprechende Zentrifuge

Country Status (4)

Country Link
US (1) US6986731B2 (de)
EP (1) EP1329263B2 (de)
DE (1) DE60301735T3 (de)
FR (1) FR2834479B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008032073B4 (de) * 2008-07-08 2015-02-05 Thermo Electron Led Gmbh Ausschwingeinheit für eine Zentrifuge
CN104056731B (zh) * 2014-06-10 2017-03-29 苏州培英实验设备有限公司 离心振荡混匀一体机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4553955A (en) * 1984-06-01 1985-11-19 Beckman Instruments, Inc. Multi-angle adapter for fixed angle centrifuge rotor
US5605529A (en) * 1996-01-17 1997-02-25 Norfolk Scientific, Inc. High efficiency centrifuge rotor
JPH09262503A (ja) * 1996-03-29 1997-10-07 Hitachi Koki Co Ltd 遠心分離機用ロータ

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3339836A (en) * 1965-02-02 1967-09-05 Internat Equipment Company Centrifuges
DE3341323C2 (de) * 1983-11-15 1987-02-19 Heraeus Separationstechnik GmbH, 3360 Osterode Laboratoriumszentrifuge
US4820257A (en) * 1988-05-10 1989-04-11 Beckman Instruments, Inc. Rotor noise suppression
JPH05138072A (ja) * 1991-11-25 1993-06-01 Hitachi Koki Co Ltd 遠心分離機用ロータ
JP3456552B2 (ja) * 1994-10-05 2003-10-14 株式会社久保田製作所 遠心分離機のアングルロータ
JPH1015436A (ja) * 1996-07-09 1998-01-20 Tomy Seiko:Kk 遠心分離方法および遠心分離機
JPH10328582A (ja) * 1997-05-29 1998-12-15 Tomy Seiko:Kk 遠心分離機のロータ
JP4061672B2 (ja) † 1997-07-23 2008-03-19 日立工機株式会社 遠心分離機用アングルロータ
JP3967849B2 (ja) * 1998-07-01 2007-08-29 株式会社トミー精工 遠心分離機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4553955A (en) * 1984-06-01 1985-11-19 Beckman Instruments, Inc. Multi-angle adapter for fixed angle centrifuge rotor
US5605529A (en) * 1996-01-17 1997-02-25 Norfolk Scientific, Inc. High efficiency centrifuge rotor
JPH09262503A (ja) * 1996-03-29 1997-10-07 Hitachi Koki Co Ltd 遠心分離機用ロータ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 02 30 January 1998 (1998-01-30) *

Also Published As

Publication number Publication date
DE60301735T3 (de) 2015-02-19
EP1329263B1 (de) 2005-10-05
EP1329263B2 (de) 2014-07-30
FR2834479A1 (fr) 2003-07-11
US20030158026A1 (en) 2003-08-21
DE60301735D1 (de) 2005-11-10
DE60301735T2 (de) 2006-03-16
US6986731B2 (en) 2006-01-17
FR2834479B1 (fr) 2004-11-19

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