DE2111228A1 - Connection head for centrifuges - Google Patents

Description

Connection head for centrifuges

vie iirfinauiij5 oeaieiit is based on connections that enable centrifuge runners to give the runners a i'luu ^ U2uf! Liren or. uua de / u runner to carry off a 1'IuI; die! xl ·.-iuαun; apply Ainea i ^ onenweijeu 2tiitrifu _ö ming and centrifugation uncci ¹ Vacuum:; laöt you especially in Anschlin-xiöpfen of ZenuTiiU.'iri 2u.

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Us is ready a connection head for a zone triue ^ aiiiit, which is designed so that the runner of an ioüöns-jntrifuge an iriuu. to ^ efünrt Oz ;;. from -the runner from _o efilurt, - / jraen can, V / il: .irend oioli the run he ur ^ iit, una iie ^ ar vjikaniiti: ^ a ^ -;.: iU '.. I: opf u ,. : fa ^ J aelarere Aüäichtun ^ svorriciitun ^ en -iCii «ine_ ⁱ ^ ine jjje ^ ibev / e ^ ang eroö ^ licl-snaen Abaio. urt ^ fo ^ t ^ n and the rotating! parts of the Αηαοΐιίαώ-j, jjie you rotating it'eile are relative to each other ortia / i.feorcmet and i;. with the runner firmly connected, and ^ io ara ;; iit üinei. i ortöf-ioten feil unaer Termit-ulun ^ · by a x / rond ^ v / ^ iiUWi allowable Bicntunsjvorriohtung, ai'ä ^ .ioina-Kiji During the operation of the centrifuge, when the centrifuge is in operation, dykes are left on the sealing device

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109839/0207

BATH ORIGINAL

Transferred so aaJ the i / ir'-isarr ^ -sit aer Aüaic;. ";Unr3voi'ric..l,u; ₁ - ^ n is impaired.

The invention is _{based on ax -uuf e} aoe, aen ώη:; ·, .. bolcner, vibrations to / erringern.

To fulfill the task lying inr zu =: rua.is beer. The invention of a connection head.:. Zuf ^ -nrer. aineü i'luaoj zuiL rotating rotor ^ ± n ~ v centrifuge and to watch ώί: ΐοε iludes au;.; derr. Runner gate, which comprises two reli civ zueiriaiiuer rotatable and sealable parts, one of which: .- ^ t is held in position while the other rotates together with the runner, v / ohei read rotating part two / x: ve carries, which serve to supply a rlud or a material to your barrel or aer centrifuge or a rlud or a LIateri ^ la ■; to lead to the runner; Aieaer Anochlihikopf is according to the invention characterized in that one of the two right ears iri a :: ialex "liicntur.g can be encircled, so that the sealing forces acting in the axial direction between both he; vä: -nt-en Parts of the connection box is exposed, v. Whereby this itohr can rotate at least in relation to the rotor or the rotatable part, as well as in that the other pipe is equipped with coupling means so that it is at least in relation to the rotor or the rotatable l ' Eil rotate and can move in the axial direction at least with respect to the rotor or the rotatable part, inter alia to transmit torsional forces between the rotor and the connection head.

In a preferred Ausfühn.ngsform which is intended for use in a centrifuge, in which a negative pressure is maintained, which is a tube coaxially erwännte .., arranged is the other äonr so en daii this other jtGhr umschlieSb.

The other pipe mentioned can be designed in such a way that it can be connected by means of wedge tracks or equivalent coupling means, e.g. a pin and oJhlitz connection, the rotor and / or the connecting head can be coupled. Thus _Ä unn of deir with runners

10983 9/0207

BATH ORIGINAL

working abscimitu of this other Itohrs as needed ;, iit a slot or a. be stranded coupling pin, vvi -'.- rreiia aer runners or a coupling part attached to it is provided with a pin or a:. · slot.

if such a coupling part is available, this is it coupling part Zweckuiäiii.,; provided with ivaiii'len, so that a flow un ^ sverbinaung for a flow between the exterior and your interior de-o runner is available.

Lui. ^; mentioned one pipe stands with the Li ^: uier and / or ue :: i jtnpci \ i '.;. «- x ^ oüf ■ zv,'ec>:.: uisii .; Ju) eν a friction clutch in Veroindun _c :, u:;: to relieve this tube of essentially all torsion "beansj> ruc.iun, ^ n, v, enn ^. Briefly a relative vV'inkelbe" veguii-v between the This friction coupling can be formed by means of dressing devices which are in such a way at {: eoranet, aal? ^ Ie the connection point: z-.vi-.cnen your mentioned Ronr and de:;, runners scvie the rotatable part aes Seal the head.

The invention: and advantageous details of the invention are shown in the following on the basis of static drawings AUSi "'.- :. r'angbeispielen explained in more detail.

ii ;. 1 ύβϊ ^ ΐ in a vertical Sormitt a ZentriiUi, 'e r.ix eineu Ant-chluiEkopi ", which is constantly flowing through with fiuds will i.ann.

jig. 2 zei ^ 't in an enlarged vertical section further details: the An.'chluirkorfes and the runner nech iig. 1.

? ig. 3 is a cross-section through an overflow plug

aes ar.schiuikopfes use :; ii ~. 2.

? ig. 4 shows a modified one on an even coarser scale Ar.:?form of the connection head according to iig. 1 and 2.

.109839 / 0207

BATH ORIGINAL

In Fig. 1 and 2 can be seen in longitudinal section, a centrifuge and the associated connection head, the the left-hand part of the two figures shows an embodiment of a centrifuge and a connection head, while the right-hand part Part of these figures shows a modified embodiment and reveals the changes which are required when the distance between the top of the rotor and the bottom of the centrifuge lid should be changed. The following Description applies to both of the embodiments shown in FIGS.

The centrifuge shown comprises an enclosure 1, in which a negative pressure can be generated, and which contains a rotor 2, which with a constant flow of The connection head 3 which enables fluids and is built into the removable cover 4 of the enclosure 1 is connected.

The rotor 2 comprises a main body 5 which can be removed from a shaft 6 which carries it and is driven by a motor is put on. In the main body 5 of the rotor, a rotor core part 7 is installed, which in the axial direction by the Main body is supported and has flow channels 8 and 9. Fig. 3 shows a longitudinal section in the rotor core part 7 built-in overflow plug 10. This overflow plug has an axial channel 11, which has radial channels 12 is connected to an annular Fludüberströmkanal 13 in which the channels 9 of the rotor core part 7 open. O-rings, which cooperate with the rotor core part 7 with a sealing effect, are arranged on both sides of the annular channel 13. The rotor core part 7 is enclosed by a hollow component 14, which has channels 15a and 15b, which with the channels 8 are in communication} also that is hollow Component 14 is provided with channels 16 which are connected to channels 9 connect. ^

; The main body 5 of the rotor and the hollow component 14 delimit a centrifuge chamber 17. The channels 15a open; 4

109833/0207

in the upper outer part of the chamber 17, the channels 15b open in the upper inner part of the chamber 17, und.die channels 16 open in the lower inner part of the chamber 17, which is divided into segments by partitions.

The connection head 3 comprises a rotatable part and a

dormant part.

The resting part of the connection head comprises a cylinder 18 provided with a flange, which is installed in a recess 20 on the top of the cover 4 or a component attached to the cover. The cylinder 18 is held in the recess 20 by a ring 21 ^ Flange 19 at the lower end of cylinder 18 can be moved in recess 20 during assembly, so that the socket head can be aligned with rotor 2. A stationary bearing bush 22 is built into the cylinder 18 and is provided with an annular channel 23 serving for water cooling and an annular channel 24 for receiving lubricating oil. At the lower end of the bearing bush 22 an oil collecting container is attached, which comprises two concentric tubes 25 which are kept separated from one another by a support tube 26 and a plug part 27 attached to the lower end of the support tube. The pipe 26 is provided with openings so that the drain oil fed in from above can pass from space A into space B as shown in FIG. In the plug member 27 is installed a ring ά plastic 28th ■

The resting part of the connection head further comprises a for applying a sealing pressure serving component 29, which! in a holding tube screwed into the stationary bearing bushing 22 30 is arranged. This component or Druckstüok 29 is; under pressure in contact with the rotatable part of the connection head held? For this Zv / corner there is a spring 31 which, with the aid of a cap 32 screwed onto the tube 30, is in its Is held and can be adjusted. The pressure piece 29 supports connecting lines 33 and 34, the line 33 opens into an axial channel 35 of the Druokstüeks, while

109839/0207

the tube 34 is connected to an annular arrangement of channels 36 of the pressure piece 29.

The rotatable part of the connection head comprises a rotatable bearing part 37 »which is rotatably mounted in the bearing bush 22 and a rotatable seal member 38 supports which is made of a plastic such as that protected by law Called "Rulon" material available. That Diohtungteil 38 has an axial channel 39 which communicates at one end with the channel 35, and several Channels 40 that connect to channels 36 at one end! the channels 39 and 40 open with their other ends on the underside of the sealing part in the rotatable bearing part 37.

In the bearing part 37 is a tube with its upper end 42 permanently installed, which, together with the bearing part, defines a first channel which is connected to the drill hole 33, and a wide channel 41, which is on the outside of the d.es Tube 42 extends coaxially with this tube and is connected to tube 34. The tube 42 protrudes down into the Overflow plug 10 in and is at its lower »end according to Pig .. 3 provided with slots 43a in the plug 10 built-in, radially inwardly projecting pins 43 engage. As a result of this arrangement, torque can flow through the pipe are transferred from dsm buyer 2 to storage part 37, while the tube 42 is stressed in the longitudinal direction is negligibly small, since the tube 42 is opposite to the Runner 2 can move in the axial direction. An O-ring 44 serves to seal the tube 42 with respect to the rotor core part 7.

The ring channel 41 surrounding the bore 42 inside the bearing part 37 is connected to the rotor 2 by a tube 45, the ends of which are provided with annular projections, which each delimit an annular recess in which an ö-ring is arranged, which together with a * «pressure-exposed O-rings that rest on the ring-shaped lugs,

109833/0207

the channel delimited by the tube 45 with respect to the interior of the enclosure 1 that can be subjected to a negative pressure seal. According to Pig. 2 is this Eohr 45 in the axial direction by the axial sealing forces of the connection head subjected to pressure while at the same time practically completely is relieved of the torsional stress absorbed by the tube 42. Because of the frictional Connection between the tube 45 and the rotor core part 7 and the bearing part 37, the tube 45 can be opposite the rotor core part and rotate the bearing part when the tube 42 deforms under torsional stress.

The following describes how this structure is assembled and how it works.

First bringing the rotor 2 in its mounting position on the W _e lle 6, whereupon the cover 4 is brought into its final position. The cylinder 18 is then arranged together with the bearing bush 22 in the position shown in FIG. 2, and the retaining ring 21 is screwed into the recess 20 in order to fix the flange 19 of the cylinder. As soon as it has been determined that the bearing bush 22 is flush with the rotor 2, the holding part or the ring nut 21 is tightened in order to clamp the saddle 19.

Now the rotatable bearing part 37 is together with the Pipes 42 and 45 fastened thereon so into the bearing bush 22. introduced that the tube 42 moves through the O-ring 44 and into engagement with the pins 43 of the plug member 10 comes. At this stage, the tube 45 is held in place by the O-rings located at its ends, with the O-rings on the provide a closer fit than the O-rings on the top end lower end, so that the tube 45 can be removed together with the bearing part 37 when the bearing part is removed,

The seal 38 is now arranged on the rotatable bearing part 37, whereupon the pressure piece 29 on the bearing part 37 or »the sealing part 38 is arranged. The holding tube

109839/0207

is screwed into the bearing bush 22, and then you build in the spring 31 and the screw cap 32, with which the assembly of the Ansohlußkopfes is finished. The cap 32 is after screwed down to apply the desired sealing pressure by which tube 45 »but not tube 42 in is subjected to pressure in the axial direction.

When the centrifuge is to be used, the enclosure is used 1 is subjected to a negative pressure, and the rotor is run up to a relatively low speed. Then a liquid such as water is pumped through the pipe 33 to fill the rotor chamber 17 and the air over the To displace channels 15a, the channels 15b at the selected Speed with respect to the channels 8 are blocked by an O-ring 46 acting as a valve.

Now the rotor speed is increased in order to open the O-ring 46, which acts as a valve, which is caused by the Centrifugal forces will be v / irkt, so that the trapped in the channels 15b Air is displaced.

The speed of the rotor is then reduced again in order to close the valve 46; then becomes a liquid which has a density gradient, in a predetermined amount with its lighter part ahead over the pipe 34 and the channels 15a are supplied to the rotor chamber 17, this liquid being the water from the chamber 17 via the channels 16 displaced to the pipe 33.

Then the speed of the rotor is increased again in order to open the valve 46 by centrifugal forces, whereupon a Sample contained in a carrier fluid is supplied via the tube 33. The carrier fluid flows with the sample from the channels 16 over the outer surface of the rotor part 14 and through the channels 15b to the tube 34. The particles of the Samples migrate through the chamber 17 in a radial direction according to their different densities. The particles can be remove the sample by adjusting the speed of the rotor

109828/0207

to close valve 46 and by passing a greater density solution through tube 34 and channels 15a to the sample via the channels 16 to the tube 33 to displace from which the sample can be taken.

In a modified embodiment of the runner, it is possible to apply a sample material to the runner at high speed and continuously supply and withdraw under a vacuum.

Pig. 4 shows a valve arrangement 47 which, if applicable over the valve formed by an O-ring 46 is preferable. This valve arrangement comprises one each Ball 49 which is pressed against a seat 50 by a spring 48 will. When the centrifugal force reaches a certain design-related value, the balls 49 are from the seats 50 lifted to connect the channels 8 to the channels 15b.

Expectations;

109839/020 7

Claims (5)

ATF CLAIMS il 'connection head for supplying loads to and removing them of 3? loaded from a rotating rotor of a centrifuge during operation, the connection head being two relative comprises mutually rotatable and sealable parts, wherein the one part is fixedly arranged, while the other Part can rotate together with a centrifuge rotor, and the rotatable part has two tubes for feeding material to or for removing material from the rotor of the centrifuge, characterized in that the a tube (45) can be clamped in the axial direction so that it exposed to the sealing forces acting in the axial direction between the mentioned parts (29, 38) of the connection head is, but can rotate at least with respect to the rotor (2) or the rotatable part (38), and that the other tube (42) is provided with coupling means (43, 43a) so that this Tube at least together with the runner (2) or the rotatable Part (38) rotate and face the or each part can move in the axial direction to torsional forces between Vl. - - the runner ixaä. to transfer the connection head (3). 2. ÄSBcfalußkopf according to claim 1 with two nested Supply and discharge pipes, thereby g e k e η η ze refuse that the outer tube (45) has the mentioned one Tube and the inner tube (42) forms the aforementioned other tube. 3. Connection head according to claim 1 or 2, characterized in that the coupling means has a pin (43) and a slot (43a), the pin and the slot being a coupling connection between the other tube (42) and the rotor (2) form the centrifuge. 109839/0207 4 · Connection head according to claim 3 »characterized in that a part (43) of the coupling means is formed by an ITudüberströmteil (10) which is attached to the Runner (2). Is attached and serves to create a plud between to allow the rotor and the pipes (42, 45) to flow over. 5. Connection head according to one of claims 1 to 4, characterized in that the second part (38) is rotatably mounted with respect to the stationary part (22, 29) with the aid of cylindrical bearing surfaces. The patent attorney: 109839/0207