WO1988003439A1 - Bague de blocage pour separateur centrifuge - Google Patents

Bague de blocage pour separateur centrifuge Download PDF

Info

Publication number
WO1988003439A1
WO1988003439A1 PCT/SE1987/000512 SE8700512W WO8803439A1 WO 1988003439 A1 WO1988003439 A1 WO 1988003439A1 SE 8700512 W SE8700512 W SE 8700512W WO 8803439 A1 WO8803439 A1 WO 8803439A1
Authority
WO
WIPO (PCT)
Prior art keywords
locking ring
rotor
fibres
sleeve
end portion
Prior art date
Application number
PCT/SE1987/000512
Other languages
English (en)
Inventor
Ingvar HÄLLGREN
Original Assignee
Alfa-Laval Separation Ab
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 Alfa-Laval Separation Ab filed Critical Alfa-Laval Separation Ab
Publication of WO1988003439A1 publication Critical patent/WO1988003439A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/08—Rotary bowls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl

Definitions

  • the present invention concerns a centrifugal separator with a rotor of the kind which comprises a first circular rotor part with a sleeve like end portion, a second rotor part with an annular edge portion arranged coaxially with the sleeve formed end portion, and a locking ring, which at least partly is inserted in said sleeve like end portion and abuts axially against the edge portion, the sleeve like end portion having internal threads and the locking ring having external threads engaging each other, whereby the locking ring is arranged to keep the rotor part axially together against forces tending to bring the rotor parts apart.
  • the object of the present invention is to obtain an improved engagement between the locking ring and the sleeve like end portion of said one rotor part in a centrifugal separator of the king initially described, without rendering it more difficult to mount and dismount the locking ring.
  • the centrifugal separator gives the following characteristics: 1) that the locking ring is made of a material comprising a matrix, which is deformable in the circumferential direction of the locking ring as a result of the rotation of the rotor, and reinforcing fibres, such as glass fibres, embedded in the matrix, a first part of said fibres being so oriented that they extend essentially in the circumferential direction of the locking ring and a second part having a radial extension and extending out in the threads of the locking ring, 2) that the amount and the distribution of the fibres are so chosen that the locking ring is elastically deformed in the circumferential direction as a result of the rotation of the rotor as much as admitted by the surrounding sleeve like end portion of the first rotor part, 3) that the first rotor part is so designed, that the deformation in the circumferential direction of its sleeve like end portion as a result of the rotation of the rotor is kept within the
  • annular edge portion of the said second rotor part has been inserted into the sleeve like end portion past the threads of the same, before the locking ring is inserted to abutment against the annular edge portion, in a way such that the part of the locking ring taking up the forces is located axially between the annular edge portion and the threads in the sleeve formed end portion.
  • fig. 1 shows a known centrifuge rotor of the kind here in question
  • fig. 2 shows an enlargement of a part of fig. 1 but with a locking ring according to the invention
  • fig. 3 shows schematically a number of layers of material, which can be included in a locking ring according to the invention.
  • a centrifuge rotor comprising two circular rotor parts 1 and 2, which at their circumference are kept together axially by means of a locking ring 3.
  • a separation chamber 4 is formed, in which two components of a liquid mixture are to be separated upon rotation of the rotor.
  • a liquid pressure is created in the separation chamber 4, which tends to press the rotor parts 1 and 2 axially apart.
  • the rotor has a vertical driving shaft 5 connected to the rotor part 1.
  • the centrifuge rotor in fig. 1 is designed according to conventional technique. Any more detailed description of the same is not necessary for the understanding of the present invention.
  • fig. 2 there is shown an enlarged part of fig. 1.
  • the rotor part 1 has a sleeve like portion 6 with internal threads, which is located in engagement with external threads on the locking ring 3.
  • the rotor part 2 has an annular edge portion 7, which is axially inserted into the sleeve like end portion 6 to abutment against a shoulder 8 of the rotor part 1.
  • the locking ring 3 is screwed into the sleeve formed end portion 6 to axial abutment against the annular edge portion 7.
  • the locking ring 3 is built up by a number of thin annular layers. Each such layer consists of a sheet of fibres, which is embedded into plastic. The different layers, which from the beginning have been quadrangular or circular, have been melt together to a body out of which a ring has been cut out and finally been machined for the shaping of the external threads.
  • fig. 3 there is illustrated four pieces of layers of the described kind, which may be a part of a locking ring 3.
  • the layers are denoted in fig. 3 with the letters a - d.
  • a first number of fibres extend in the circumferential direction of the annular layer and a second number of fibres essentially radially.
  • certain fibres extend parallelly to a direction x and the other fibres parallelly to another direction y perpendicular to the direction x.
  • the fibres extend as in the layer c, but all the layer d is turned to an angle ⁇ relative to the layer c around a central axis z .
  • a locking ring 3 By melting together a number of layers of the same or different kind a locking ring 3 can be provided with the exact wanted characteristics concerning density, strength and elastic deformabillty in different direction.
  • the thickness of each layer can be varying. On the market there is available for instance layers consisting of glass fibres embedded in eppxi-plastic, which layers have a thickness of between 0.1 and 2.0 mm.
  • the wanted characteristics of a locking ring 3 are such, that the locking ring during the rotation of the centrifuge rotor will be elastically deformed as a result of the centrifugal force to abutment radially against the inside of the sleeve like end portion 6 of the rotor part 1. Thereby a satisfactory engagement is obtained during operation between the threads of the locking ring 3 and the end portion 6, respectively.
  • the end portion 6 has to be designed such that it can be deformed less than the locking ring 3 in radial direction. If wanted the end portion 6 can have an external strengthening sleeve of the kind that is suggested in U.S. 4,160,521, but this is not necessary.
  • the locking ring has lower density than the sleeve like end portion 6 of the rotor.
  • the locking ring can in an effective manner take up the shear and bending forces occurring in the same during operation.
  • a locking ring built up in the manner described above gets a rather low strength against tensile forces in axial direction.
  • a locking joint Depending on how a locking joint is designed a need, therefore, can arise for strengthening of the strength of the locking ring in axial direction.
  • the locking ring joint shown in the drawing is of this kind.
  • glass fibres and carbon fibres are possible in a locking ring according to the invention. For instance, it is possible to combine fibres of both these types in the same locking ring by melting together layers containing different types of fibres.

Landscapes

  • Centrifugal Separators (AREA)

Abstract

Dans un rotor centrifuge, une bague annulaire de blocage (3) est agencée de façon à s'engager par des filets extérieurs dans des filets intérieurs d'une partie similaire à un manchon (6) d'une partie de rotor (1), reliant ainsi axialement cette partie de rotor à une autre partie de rotor (2). La bague de blocage (3) est fabriquée en un matériau composite comprenant une matrice et des fibres noyées dans la matrice. Une première partie des fibres s'étend dans le sens de la circonférence de la bague de blocage et une deuxième partie des fibres s'étend radialement vers l'extérieur, pénétrant dans les filets de la bague de blocage. La quantité et la distribution des fibres sont sélectionnées de sorte que la bague élastique (3) se déforme élastiquement dans le sens de sa circonférence lorsque le rotor est mis en rotation, autant que la partie terminale (6) environnante du manchon le permet. On obtient ainsi un rotor centrifuge facile à monter et à démonter, lorsqu'il n'est pas en service, et un emboîtement satisfaisant, pendant son fonctionnement, entre la bague de blocage (3) et la partie terminale similaire à un manchon (6), étant donné que les fibres radiales absorbent des efforts de flexion et de cisaillement s'exerçant axialement sur la bague de blocage (3).
PCT/SE1987/000512 1986-11-04 1987-11-02 Bague de blocage pour separateur centrifuge WO1988003439A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8604712A SE455272B (sv) 1986-11-04 1986-11-04 Lasring for en centrifugrotor
SE8604712-3 1986-11-04

Publications (1)

Publication Number Publication Date
WO1988003439A1 true WO1988003439A1 (fr) 1988-05-19

Family

ID=20366186

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1987/000512 WO1988003439A1 (fr) 1986-11-04 1987-11-02 Bague de blocage pour separateur centrifuge

Country Status (2)

Country Link
SE (1) SE455272B (fr)
WO (1) WO1988003439A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5062826A (en) * 1989-07-14 1991-11-05 Marco Mantovani Device for locking a blood centrifugation cell on a chuck
US6432034B1 (en) * 1999-03-09 2002-08-13 Alfa Laval Ab Looking ring for a centrifugal separator
US8808154B2 (en) * 2010-09-13 2014-08-19 Hiller Gmbh Drive apparatus in a scroll centrifuge having a gearbox with a housing nonrotatably connected to a drive shaft

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB403749A (en) * 1932-07-13 1934-01-04 Perfect Tape Coupler Company L An improvements in or relating to knot-tying devices
US4000665A (en) * 1975-08-26 1977-01-04 The Johns Hopkins University Woven filament rotor structure
US4098142A (en) * 1975-11-14 1978-07-04 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Rotatable mass for a flywheel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB403749A (en) * 1932-07-13 1934-01-04 Perfect Tape Coupler Company L An improvements in or relating to knot-tying devices
US4000665A (en) * 1975-08-26 1977-01-04 The Johns Hopkins University Woven filament rotor structure
US4098142A (en) * 1975-11-14 1978-07-04 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Rotatable mass for a flywheel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5062826A (en) * 1989-07-14 1991-11-05 Marco Mantovani Device for locking a blood centrifugation cell on a chuck
AU619994B2 (en) * 1989-07-14 1992-02-06 Dideco S.R.L. Device for locking a blood centrifugation cell on a chuck
US6432034B1 (en) * 1999-03-09 2002-08-13 Alfa Laval Ab Looking ring for a centrifugal separator
US8808154B2 (en) * 2010-09-13 2014-08-19 Hiller Gmbh Drive apparatus in a scroll centrifuge having a gearbox with a housing nonrotatably connected to a drive shaft

Also Published As

Publication number Publication date
SE8604712D0 (sv) 1986-11-04
SE455272B (sv) 1988-07-04
SE8604712L (sv) 1988-05-05

Similar Documents

Publication Publication Date Title
US4660435A (en) Fiber composite flywheel rim
US5901616A (en) Inertial mass for vibration isolators
US5888140A (en) Torsionally stiff, flexible shaft coupling, especially one made entirely of steel
CN101107455A (zh) 弹性连接构件
KR920000974B1 (ko) 탄성축 커플링
US4306836A (en) Hub assembly
US3427826A (en) Quick disconnect flexible couplings and hub mountings
GB2154301A (en) A powdered metal, flanged bushing for securing machine elements to shafts
US3901047A (en) Resilient coupling
US4063433A (en) Elastic rotational couplings
WO1988003439A1 (fr) Bague de blocage pour separateur centrifuge
IL46018A (en) Elastic friction coupling
EP0136963A2 (fr) Disque composée flexible pour raffineur et son procédé de fabrication
EP0642635B1 (fr) Dispositif pour volant d'inertie
KR20160085715A (ko) 열가소성 수지가 뿌려진 탄소 섬유로부터 얻은 복합 재료로 만들어진 허브를 포함하는 회전익기 로터
CA1087862A (fr) Palier spherique souple
EP0182902B1 (fr) Separateur centrifuge
US4732337A (en) Meat chopper blade head
GB2166843A (en) Super-resilient shaft coupling
US5295912A (en) Resilient shaft coupling designed as a composite part and method of producing it
EP0164013A1 (fr) Accouplement d'arbres travaillant par cisaillement d'un élastomère
JPH0299701A (ja) ロータ本体を中空軸へ取外し可能に結合する機構
GB2168452A (en) Tubular member composed of a polymeric material
US4150582A (en) Rotor ring for inertial energy storage rotor
JPS6137477B2 (fr)

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE