EP0487915B1 - Tête de rotor sous forme de cône pour centrifugeuses - Google Patents

Tête de rotor sous forme de cône pour centrifugeuses Download PDF

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Publication number
EP0487915B1
EP0487915B1 EP91118465A EP91118465A EP0487915B1 EP 0487915 B1 EP0487915 B1 EP 0487915B1 EP 91118465 A EP91118465 A EP 91118465A EP 91118465 A EP91118465 A EP 91118465A EP 0487915 B1 EP0487915 B1 EP 0487915B1
Authority
EP
European Patent Office
Prior art keywords
angle head
head according
base
outer part
angle
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
Application number
EP91118465A
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German (de)
English (en)
Other versions
EP0487915A1 (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 EP0487915A1 publication Critical patent/EP0487915A1/fr
Application granted granted Critical
Publication of EP0487915B1 publication Critical patent/EP0487915B1/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

Definitions

  • the present invention relates to an angular head for centrifuges according to the preamble of patent claim 1.
  • Such an angular head with fixed, non-swinging out beakers is usually manufactured with great manufacturing effort.
  • Such an angle head is milled from a solid material, the receiving bores for receiving the cups likewise being produced by a large number of drilling and milling processes connected in series.
  • Similar angular heads are e.g. B. known from DE 36 01 789 C1.
  • a centrifuge rotor has a lower part with a frusto-conical wall widening downwards and an essentially correspondingly directed outer part.
  • receptacles of the vessels running downwards and outwards are provided in the lower part. With the rotor open, the tubes are inserted laterally from the outside and guided laterally. The side openings are covered by the outer part.
  • the bracket must also perform lateral guidance when starting and braking as well as radial guidance at high speeds. Since the available surface of the bracket is very small, extreme care and costs must be used here.
  • the present invention is therefore based on the object of developing an angular head for centrifuges of the type mentioned in such a way that it can be manufactured much more cost-effectively and simply with conventional load-bearing capacities, such as comparable angular heads of the prior art.
  • the invention is characterized by the technical teaching of claim 1.
  • the two parts are preferably connected to one another in the region of the horizontal cover flange of the angle head, because there are favorable fastening surfaces after the two parts are in this Area preferably over rags and thereby a large fastening area is created.
  • a sheet metal material is preferably used as the material for the relatively highly stressed outer part, which is drawn in at the outer edge and thus forms a stable support for the bottom region of the cups inserted into the receiving openings of the angle head.
  • Beakers which are usually designed as plastic sleeves, are inserted into glass tubes with the test material.
  • the inwardly drawn collar on the outer edge of the outer part can be formed at a right angle or in a rounded shape and protrudes over the center of the tube base, in order to thus ensure a support surface for the tube base during the centrifuging process and also when standing.
  • the inner part can be injection-molded or cast from an inexpensive plastic material and the inner part essentially serves only as a radially inwardly directed support surface for the cups inserted into the receiving bores and therefore does not have to transmit any centrifugal forces.
  • the parting line between the inner part and the outer part is preferably applied in the base region of the cup, in order to ensure a practically closed angle head, which is thus particularly aerodynamically designed.
  • the inner part thus essentially serves as a windbreak in the area of the cup.
  • the inner part also forms the rotor hub at the same time, and thus to transmit the rotary drive forces acting on the angular head to the outer part via the fastening arranged in the vicinity of the rotor hub between the inner part and the outer part.
  • the inner and outer parts overlap in this area and large, load-transmitting surfaces can thus be created between the two parts, by means of which it opens it is easily possible, on the one hand, to transfer the centrifugal force of the outer part to the inner part and, on the other hand, to transmit the torque loads from the inner part to the outer part.
  • the recesses on the top of the outer part for receiving the corresponding cups are elliptical.
  • the plastic part is cylindrical to a certain extent in the upper and lower area, that is to say it is designed vertically, in order to be able to attach favorable balancing masses to it. This means that annular spaces are formed on the inner circumference, which are not filled by the inserted cups, so that appropriate balancing weights can be introduced into these annular spaces.
  • the angle head 1 essentially consists of a cup-shaped outer part 2, preferably made of a sheet metal, which initially has an upper, horizontally extending cover ring 6 from the outer part 2.
  • elliptical recesses 10 are formed, into which cups 9 can be inserted, into which cups, in turn, glass tubes (not shown in more detail) with the examination liquid can be inserted.
  • the cup-shaped outer part 2 extends obliquely, directed radially outwards and forms an outer wall 11 of the outer part 2 there, which near the bottom of the cup merges into an inwardly directed, cranked, annular bottom part 12.
  • the length of the base part 12 from the outer part 2 is such that the base part 12 extends beyond the longitudinal center axis 13 of the cup 9, so that the cup 9 rests on the base part 12 in all functional positions.
  • the bottom part 12 thus transmits the centrifugal load of the cup 9 to the outer wall 11 of the outer part 2 and this transmits the centrifugal load to the horizontal cover ring 6 of the outer part 2.
  • the inner wall of the angle head 1 is formed by a likewise cup-shaped inner part 3, which is preferably formed from a plastic part.
  • the inner part 3 has the receiving bore 5 for the rotor hub 4 and likewise forms a horizontal, disk-shaped area on which the cover ring 6 of the outer part 2 is arranged to overlap.
  • the cover ring 2 is connected to the inner part 3 in the region of the rotor hub 4 by means of screws which are arranged on the circumference and are inserted into the screw bore 7.
  • the inner part 3 forms a horizontally directed bottom 25, which in turn merges at its radially outer end via a part 26 which is bent obliquely outwards.
  • the part 26 forms with the bottom part 12 of the outer part 2 a parting line 24, via which no load is transmitted.
  • the base part 12 of the outer part 2 thus lies perpendicular to the longitudinal center axis 13 of the cup 9 and, at position 14, absorbs the centrifugal force exerted by the cup base 21 on the base part 12 of the outer part 2 at position 14.
  • webs 20 are formed on the inner part 3, which are arranged parallel to each other in pairs on the outer circumference of the inner part 3 according to FIG. 2 and form the lateral displacement limitation for the cups 9 inserted into the receiving bores 10.
  • the webs 20 are located approximately at half the height of the cup length below the circular ring region 8 of the elliptical recesses 10.

Landscapes

  • Centrifugal Separators (AREA)

Claims (10)

  1. Tête angulaire pour centrifugeuses destinée à recevoir un certain nombre de godets qui sont disposés dans des creux de ladite tête suivant un angle défini par rapport à la verticale, étant précisé que le fond de chaque godet est en appui contre des surfaces d'appui de la tête angulaire, et que la tête angulaire (1) est réalisée en au moins deux parties et se compose d'une partie extérieure (2) apte à être sollicitée mécaniquement, et d'une partie intérieure (3) moins apte à être sollicitée, la partie intérieure (3) étant reliée à la partie extérieure (2) au moins dans la zone du moyeu de rotor (4), caractérisée en ce que la partie extérieure (2) comporte, au niveau de sa circonférence extérieure et à proximité du fond des godets (9), une partie de fond (12) qui est repliée radialement vers l'intérieur suivant un certain angle et qui dépasse du milieu du fond de godet (21) sur lequel s'appuie le godet (9), et en ce que la surface d'appui prévue radialement à l'intérieur pour le godet (9) est formée par la partie intérieure (3).
  2. Tête angulaire selon la revendication 1, caractérisée en ce que la partie de fond (12) de la partie extérieure (2) est concave dans la zone de la surface d'appui prévue pour le fond de godet (21).
  3. Tête angulaire selon la revendication 1, caractérisée en ce que la partie de fond (12) de la partie extérieure (2) est droite.
  4. Tête angulaire selon l'une des revendications 2 ou 3, caractérisée en ce que le plan de la partie de fond (12) de la partie extérieure (2) forme un angle aigu (22) avec la verticale (23).
  5. Tête angulaire selon l'une des revendications 1 à 4, caractérisée en ce que la partie extérieure (2) se compose d'un élément en tôle.
  6. Tête angulaire selon l'une des revendications 1 à 5, caractérisée en ce que la partie intérieure (3) se compose d'un élément en matière plastique.
  7. Tête angulaire selon l'une des revendications 1 à 6, caractérisée en ce que la partie intérieure (3) comporte le perçage de logement (5) prévu pour l'axe d'entraînement du rotor.
  8. Tête angulaire selon l'une des revendications 1 à 7, caractérisée en ce que la partie extérieure (2) comporte une bague de recouvrement horizontale (6) qui est reliée à la partie intérieure (3) dans la zone entourant le moyeu de rotor (4).
  9. Tête angulaire selon l'une des revendications 1 à 8, caractérisée en ce que la partie intérieure (3) forme, au niveau de la circonférence intérieure, un ou plusieurs espaces annulaires (19) dans lesquels peuvent être placés par exemple des poids d'équilibrage.
  10. Tête angulaire selon l'une des revendications 1 à 9, caractérisée en ce qu'il est prévu, pour la limitation latérale du logement (10) défini dans la tête angulaire (1), au niveau de la partie intérieure (3), des nervures latérales (20) qui sont disposées, espacées les unes des autres, sur la circonférence et qui bloquent les godets (9) à l'encontre d'un déplacement dans le logement (10), dans le sens circonférentiel.
EP91118465A 1990-11-30 1991-10-30 Tête de rotor sous forme de cône pour centrifugeuses Expired - Lifetime EP0487915B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9016288U 1990-11-30
DE9016288U DE9016288U1 (de) 1990-11-30 1990-11-30 Winkelkopf für Zentrifugen

Publications (2)

Publication Number Publication Date
EP0487915A1 EP0487915A1 (fr) 1992-06-03
EP0487915B1 true EP0487915B1 (fr) 1994-07-27

Family

ID=6859848

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91118465A Expired - Lifetime EP0487915B1 (fr) 1990-11-30 1991-10-30 Tête de rotor sous forme de cône pour centrifugeuses

Country Status (3)

Country Link
US (1) US5232432A (fr)
EP (1) EP0487915B1 (fr)
DE (2) DE9016288U1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960700102A (ko) * 1993-01-14 1996-01-19 게셈 맬리크마다니 모하메드 초경량 복합재질로 된 원심분리기 로터(ultra-light composite centrifuge rotor)
US5354254A (en) * 1993-04-15 1994-10-11 Separation Technology, Inc. Centrifuge rotor head with tube neck support
DE29914207U1 (de) * 1999-08-14 2000-09-21 Sigma Laborzentrifugen Gmbh, 37520 Osterode Rotor für eine Laborzentrifuge
US6899810B1 (en) 2000-08-11 2005-05-31 Millipore Corporation Fluid filtering device
DE102004062232B4 (de) * 2004-12-23 2013-01-10 Thermo Electron Led Gmbh Rotor für Laborzentrifugen
US8323169B2 (en) * 2009-11-11 2012-12-04 Fiberlite Centrifuge, Llc Fixed angle centrifuge rotor with tubular cavities and related methods

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL26529C (fr) * 1926-12-22
US2447330A (en) * 1946-05-16 1948-08-17 Grebmeier Joseph Rotor for ultracentrifuge machines
US2878992A (en) * 1956-12-28 1959-03-24 Beckman Instruments Inc Centrifuge apparatus and rotor therefor
US3720368A (en) * 1971-07-15 1973-03-13 Bio Dynamics Inc Centrifuge with blood sample holding means
AT308712B (de) * 1971-10-08 1973-07-25 Immuno Ag Tischzentrifuge
US3825178A (en) * 1971-12-17 1974-07-23 American Hospital Supply Corp Centrifuge rotor
US3970245A (en) * 1975-05-21 1976-07-20 Dr. Molter Gmbh Universal centrifuge
JPS57937Y2 (fr) * 1978-03-13 1982-01-07
US4509940A (en) * 1981-05-11 1985-04-09 E. I. Du Pont De Nemours And Company Fixed angle pelleting rotor configured to provide a maximum clearing rate factor
US4412830A (en) * 1982-06-24 1983-11-01 Beckman Instruments, Inc. Cover for centrifuge rotor
US4449965A (en) * 1982-10-04 1984-05-22 Beckman Instruments, Inc. Shell type centrifuge rotor having controlled windage
US4484906A (en) * 1983-05-02 1984-11-27 Beckman Instruments, Inc. Shell type centrifuge rotor retaining ruptured tube sample
DE3334655C2 (de) * 1983-09-24 1987-02-12 Heraeus Separationstechnik GmbH, 3360 Osterode Zentrifugenrotor
DE3343846C2 (de) * 1983-12-03 1987-02-12 Heraeus Separationstechnik GmbH, 3360 Osterode Zentrifugenrotor
US4553955A (en) * 1984-06-01 1985-11-19 Beckman Instruments, Inc. Multi-angle adapter for fixed angle centrifuge rotor
DE3601789C1 (en) * 1986-01-22 1987-03-05 Eppendorf Geraetebau Netheler Centrifuge rotor
DE3703514A1 (de) * 1987-02-05 1988-08-18 Hettich Andreas Fa Winkelkopf fuer zentrifugen
NL8700642A (nl) * 1987-03-18 1988-10-17 Ultra Centrifuge Nederland Nv Centrifuge voor het scheiden van vloeistoffen.
ATE61742T1 (de) * 1987-06-20 1991-04-15 Eppendorf Geraetebau Netheler Zentrifugenrotor.
US4820257A (en) * 1988-05-10 1989-04-11 Beckman Instruments, Inc. Rotor noise suppression

Also Published As

Publication number Publication date
US5232432A (en) 1993-08-03
DE59102352D1 (de) 1994-09-01
DE9016288U1 (de) 1991-10-10
EP0487915A1 (fr) 1992-06-03

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