EP0388667A1 - Rotor centrifuge avec tubes d'essai à insérer dans le rotor - Google Patents

Rotor centrifuge avec tubes d'essai à insérer dans le rotor Download PDF

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Publication number
EP0388667A1
EP0388667A1 EP90103805A EP90103805A EP0388667A1 EP 0388667 A1 EP0388667 A1 EP 0388667A1 EP 90103805 A EP90103805 A EP 90103805A EP 90103805 A EP90103805 A EP 90103805A EP 0388667 A1 EP0388667 A1 EP 0388667A1
Authority
EP
European Patent Office
Prior art keywords
disc
rotor
tubes
centrifuge rotor
centrifuge
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
EP90103805A
Other languages
German (de)
English (en)
Other versions
EP0388667B1 (fr
Inventor
Günter Eberle
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.)
Andreas Hettich GmbH and Co KG
Original Assignee
Andreas Hettich GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Andreas Hettich GmbH and Co KG filed Critical Andreas Hettich GmbH and Co KG
Publication of EP0388667A1 publication Critical patent/EP0388667A1/fr
Application granted granted Critical
Publication of EP0388667B1 publication Critical patent/EP0388667B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B04B5/0421—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles comprising test tubes pivotably mounted
    • 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
    • B04B2005/0435—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles with adapters for centrifuge tubes or bags

Definitions

  • the invention relates to a centrifuge rotor with insert tubes which are spun in the rotor, a support being provided on the inner circumference of the rotating rotor during centrifugation.
  • centrifuge rotor is already known from DE 17 82 602 B2, where a swing-out hanger is provided and each hanger consists of a metal cup which is rotatably or pivotably mounted in the centrifuge rotor with a leg spring.
  • the leg springs are displaced such that the hanger is supported with its base area on the inner circumference of an outer circumferential support ring of the rotor.
  • leg springs which tend to fatigue in the long run.
  • the suspension which is otherwise designed with bendable leg springs, is solved with a rubber-elastic suspension, which, however, also tends to break and, above all, become brittle over a longer service life.
  • the present invention is therefore based on the object of developing a centrifuge rotor of the type mentioned in such a way that it is much easier, can be manufactured more cost-effectively and that it can be operated in a more reliable manner.
  • the invention is characterized in that the rotor has essentially a horizontal disc, which has a circumferential offset on its radial outer periphery, that as swinging hanger tubes are pivotally mounted on the disc, which swing out with their bottom area Move inwards in the axial direction of the tube and in the radial direction of the disk, thus keeping the pivot bearing free of centrifugal force or relieving it.
  • pivot bearing is designed so that the tubes serve directly as swing-out hangers themselves and are attached to the disc in such a pivot-mounted manner that, when these tubes swing out, they move axially inward and thereby relieve the pivot bearing and not participates more in the power transmission.
  • the disc is thus self-supporting, and it is now possible for the first time to design a disc-like flat rotor bowl that could also function completely without an air bowl and without a lid.
  • the swivel bearings between the disc and the assigned sample vessels (tubes) therefore only serve to transfer the load in the extremely extremely low speed range, until the tubes have swung out and rest with their base area on the inner wall of the bend of the disc and at the same time shift inward in the radial direction and thus free the pivot bearings from any power transmission.
  • pivot bearing eccentric ie outside of the center of gravity of the tube and above the tube.
  • an eccentric bearing according to the invention i.e. a pivot bearing, which starts above the tube on the outside of the tube if possible, then one achieves that the swinging tubes (as far as there is no stop) would even swing upwards over their horizontal position.
  • the disc is provided, which thus forms radially outer and horizontal stops for the tube, so that the tubes are bounded by the disc swinging out into a horizontal position exactly when swinging out.
  • the disc not only serves as a force-transmitting element for the centrifugal force, but also as a swivel stop for the horizontally swinging tubes.
  • the pivot bearing consists of individual webs which are present in the space between radially outwardly directed recesses.
  • the tube can swing in or swing up with its opening area when it is in the relaxation area and the other opening then serves to ensure that the handle-like extension can reach down through the opening on the tube through the disc.
  • the shape of the recesses of the radially successive recesses is relatively indifferent; it only has to be ensured that the opening of the tube can swing out through one recess and the handle can dip into the disk through the other opening.
  • These recesses can thus be designed as round or oval recesses or as slots.
  • the intermediate area between these recesses which is defined by the material of the disk, is designed here as a web over which the handle grips and over which the handle is pivotably mounted.
  • the webs being formed by the material of the disk
  • the rotor boiler 1 consists of a wind boiler 3, which preferably consists of a deep-drawn sheet metal material.
  • the wind chamber 3 could, however, also be made of plastic.
  • a horizontal disc 2 Arranged on the inside is a horizontal disc 2 made of a plastic material or a metal material, which has an angled portion 4 pointing downwards.
  • the disk 2 with the offset 4 in this case forms a contact area 5 with the inner wall of the wind chamber 3.
  • the disk 2 is preferably connected in one piece to a hub 6, which has a lower fastening ring 25, on which a mounting ring 26 is arranged, and fastening screws 7 are provided which connect the bottom region of the air chamber 3 to the hub 6.
  • the hub 6 has a receiving part 10 embedded on its upper side the middle, which has an internal thread. This internal thread is screwed onto the associated threaded attachment 13, which is connected in a rotationally fixed manner to a cover button 12.
  • a cover 11 is thus placed on the pane 2, the cover 11 having an outer circumferential flange 14, on the underside of which a circumferential seal 15 is arranged, which rests on a likewise circumferential flange 27 of the wind boiler. This ensures a hermetically sealed closure of the rotor vessel 1.
  • wind chamber 3 has on its part near the hub an inner flange 8 with which it is connected via the screws 7 to the circumferential fastening ring 25 of the hub.
  • the hub 6 also has a central recess 9 on the underside, in which the motor drive shaft of the centrifuge engages.
  • each tube 17 has a handle-like extension 20, which is part of the pivot bearing, this handle-like extension engaging over webs 18, which are part of the disk 2.
  • the webs 18 are the spaces between the recesses 16, 19 of the disk.
  • the tube 17 In the rest position, the tube 17 reaches with its upper opening area through the radially inner recess 16 in the disc and the handle 20 dips through the recess 19 under the lower edge of the disc 2.
  • the tube 17 swings out in the direction of the arrow 21 and the bottom 22 moves here on the swivel radius 21.
  • the tube swings with its upper region through the recess 16, the handle 20 dips into the recess 19 and the bottom 22 thus lies against the inner wall 23 of the offset 4.
  • the distance 28 between the web 18 and the inner wall 23 of the bend 4 is smaller than the distance 29 between the handle 20 and the bottom 22 of the tube 17. Only this ensures that the bottom 22 when it bears against the inner wall 23 in the axial direction 24 and thereby the handle 20 no longer rests on the web 18 in a load-transmitting manner.
  • the web 18 is thus freed from the load transmission, and the transmission of the centrifugal force from the tube 17 only takes place via the tube 17 itself via the base 22 to the offset 4 and from there to the disc 2 and from the disc directly to the hub 6 of the rotor.
  • wind chamber 3 can also be completely dispensed with in certain applications, so that only a disk-shaped rotor is present, which has the shape of the disk 2. Likewise, the cover 11 could then be omitted.

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  • Centrifugal Separators (AREA)
EP90103805A 1989-03-21 1990-02-27 Rotor centrifuge avec tubes d'essai à insérer dans le rotor Expired - Lifetime EP0388667B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8903511U 1989-03-21
DE8903511U DE8903511U1 (fr) 1989-03-21 1989-03-21

Publications (2)

Publication Number Publication Date
EP0388667A1 true EP0388667A1 (fr) 1990-09-26
EP0388667B1 EP0388667B1 (fr) 1993-01-20

Family

ID=6837361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90103805A Expired - Lifetime EP0388667B1 (fr) 1989-03-21 1990-02-27 Rotor centrifuge avec tubes d'essai à insérer dans le rotor

Country Status (2)

Country Link
EP (1) EP0388667B1 (fr)
DE (2) DE8903511U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0830898A3 (fr) * 1996-09-24 1999-03-17 Beckman Coulter, Inc. Assemblage de confinement d'une centrifugeuse
CN104056733A (zh) * 2014-06-10 2014-09-24 苏州培英实验设备有限公司 自闭式按压离心机转盘
CN104056730A (zh) * 2014-06-10 2014-09-24 苏州培英实验设备有限公司 一种新型离心机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4305581A1 (de) * 1993-02-24 1994-08-25 Hettich Andreas Fa Rotor für eine Schwenkbecherzentrifuge
DE4323844A1 (de) * 1993-07-16 1995-01-19 Hettich Andreas Fa Waschzentrifuge

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT65736B (de) * 1913-07-29 1914-07-25 Ludwig Schulmeister Schleuder, insbesondere für Untersuchungszwecke.
CH296421A (de) * 1951-10-20 1954-02-15 Willems Peter Prof Em Zentrifuge mit schwenkbar gelagerten Bechern.
US3420437A (en) * 1967-02-15 1969-01-07 Sorvall Inc Ivan Cell washing centrifuge
FR2107154A5 (fr) * 1970-09-08 1972-05-05 Technicon Instr

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2109764A1 (en) * 1971-03-02 1972-09-07 Storz, Martin, 7200 Tuttlingen Swing head centrifuge - for swingable sample cups

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT65736B (de) * 1913-07-29 1914-07-25 Ludwig Schulmeister Schleuder, insbesondere für Untersuchungszwecke.
CH296421A (de) * 1951-10-20 1954-02-15 Willems Peter Prof Em Zentrifuge mit schwenkbar gelagerten Bechern.
US3420437A (en) * 1967-02-15 1969-01-07 Sorvall Inc Ivan Cell washing centrifuge
FR2107154A5 (fr) * 1970-09-08 1972-05-05 Technicon Instr

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0830898A3 (fr) * 1996-09-24 1999-03-17 Beckman Coulter, Inc. Assemblage de confinement d'une centrifugeuse
CN104056733A (zh) * 2014-06-10 2014-09-24 苏州培英实验设备有限公司 自闭式按压离心机转盘
CN104056730A (zh) * 2014-06-10 2014-09-24 苏州培英实验设备有限公司 一种新型离心机
CN104056733B (zh) * 2014-06-10 2017-06-13 苏州培英实验设备有限公司 自闭式按压离心机转盘

Also Published As

Publication number Publication date
DE59000773D1 (de) 1993-03-04
EP0388667B1 (fr) 1993-01-20
DE8903511U1 (fr) 1990-01-11

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