EP1877193B1 - Rotor für eine zentrifuge - Google Patents

Rotor für eine zentrifuge Download PDF

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Publication number
EP1877193B1
EP1877193B1 EP06753442A EP06753442A EP1877193B1 EP 1877193 B1 EP1877193 B1 EP 1877193B1 EP 06753442 A EP06753442 A EP 06753442A EP 06753442 A EP06753442 A EP 06753442A EP 1877193 B1 EP1877193 B1 EP 1877193B1
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EP
European Patent Office
Prior art keywords
waste collecting
bearing part
collecting part
rotor
bearing
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.)
Active
Application number
EP06753442A
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German (de)
English (en)
French (fr)
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EP1877193A1 (de
Inventor
Karl Grosse Wiesmann
Uwe Dr. Meinig
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.)
Ing Walter Hengst GmbH and Co KG
Original Assignee
Ing Walter Hengst GmbH and Co KG
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Application filed by Ing Walter Hengst GmbH and Co KG filed Critical Ing Walter Hengst GmbH and Co KG
Publication of EP1877193A1 publication Critical patent/EP1877193A1/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
    • B04B5/005—Centrifugal separators or filters for fluid circulation systems, e.g. for lubricant oil circulation systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/12—Suspending rotary bowls ; Bearings; Packings for bearings

Definitions

  • the present invention relates to a rotor for a centrifuge, wherein the rotor is rotatably driven about an axis of rotation, wherein the rotor is designed in two parts with a central bearing part and on the one hand a dirt collecting portion having dirt collecting part, wherein the waste collecting part for disposal or cleaning of the bearing part is separable and wherein the bearing part and the dust collecting part are designed with positively and / or non-positively cooperating torque transmission means, which are engageable by axially plugging the dirt catching part on the bearing part in engagement and by axial removal of the waste collecting part from the bearing part.
  • Centrifuges have been used for various uses for decades and are therefore known in many different designs.
  • an inner diameter of the rotor generally centered on an outer diameter of the axis or on an outer diameter of a component located between axis and rotor, such as rotor bearing or drive part.
  • a mounting clearance between the parts of the rotor is usually required; a maximum of slight compression is permissible so that the rotor can still be mounted and dismantled.
  • the aim is increasingly to build the rotor as easily as possible, for example by using plastic instead of metal.
  • the document DE 10 2004 005 920 A1 shows a free-jet centrifuge with a rotor in which a dirt trap part as a disposable part made of plastic and a bearing part as a recoil turbine are plugged together and pulled apart.
  • a ring area engages the dirt-trapping part is positively connected radially on the outside over an oppositely shaped annular region of the bearing part, whereby a slip-free torque transmission from the drive part to the dirt trapping part is achieved.
  • the plastic dust collecting part may have this on its outer circumference extending in the longitudinal or circumferential direction reinforcing ribs.
  • the document DE 197 15 661 A1 shows a centrifuge with a two-piece rotor.
  • the rotor upper part with a dirt trap area is made of plastic.
  • the rotor base with bearing part and nozzles is made of metal.
  • a separation of the rotor parts is only possible after removal of the entire rotor from the centrifuge, because a lying below the rotor base nut must be solved, which holds the upper and lower parts together.
  • An axial withdrawal of the rotor upper part from the top of the rotor is structurally not possible here.
  • the document DE 484 609 C describes a centrifuge with a drive part and a dirt trap part, which is axially plugged onto the drive part.
  • the drive part has a shaft with a conical upper end, on which the waste collecting part is placed with a diametrically opposed receiving opening.
  • a dirt trap part made of plastic is subject to the operation of the centrifuge of the risk of deformation under the influence of centrifugal forces and / or heat.
  • an increasing play arises in the area of the connection between the dirt trapping part and the bearing part which leads to an increasing unbalance and thus to a loss of performance Centrifuge, resulting in a shortened bearing life and disturbing noises.
  • a first solution of this object is achieved according to the invention by a rotor of the type mentioned above, which is characterized in that the bearing part and the dust collecting part are provided with positive contours, which are arranged so that the contours of the waste collecting part already in its ground state or in its radial expansion by centrifugal forces and / or heating to the correspondingly shaped contours of the bearing part lean or create that the positive contours are formed by annular areas, that the bearing part made of metal or plastic and axially above and axially below each having a concentric to the axis of rotation ring area that the dirt trap part consists of plastic and axially above and axially below each having an annular region, that in the assembled state of the bearing part and the dirt trapping each of the annular region of the bearing part radially surrounds the annular region of the waste trapping part and that the positive co Seen in the radial direction in the inner half of the radius of the bearing part and the waste collecting part are arranged nturen.
  • the bearing part which can be shaped in a dimensionally stable manner, ensures exact centering and thus unbalance concentricity of the hollow body forming and made of plastic and thus inherently more unstable.
  • the centrifugal force arising during the rotation of the rotor during operation of the centrifuge even ensures that the contours of the dirt-collecting part bear against the respectively associated contours of the bearing part that are stable in their shape and position, so that the dirt-catching part becomes exactly the same due to the rotation of the rotor rotationally symmetric shape inevitably assumes and retains during rotation of the rotor.
  • the dirt trap part made of plastic can be made relatively easily and with relatively low material thicknesses, without the risk of performance-reducing imbalance occurs, which is advantageous both in the production and operation of the centrifuge.
  • the creation of contours the dirt-collecting part to the contours of the bearing part under the action of centrifugal force during operation of the centrifuge also advantageously reduces micro-movements between the bearing part and the dirt-catching part due to the power flow generated thereby. This counteracts a removal of material and wear in this area by the effect of, for example, externally recorded oscillatory accelerations. Because the form-fitting contours are formed by ring areas, a precisely round shape of the dirt-catching part can be ensured particularly effectively during the rotation of the rotor.
  • the bearing part consists of metal or plastic and has axially above and / or axially below (each) a concentric to the axis of rotation ring area
  • the dirt trap part is made of plastic and has axially above and / or axially below a ring area and in the assembled state of bearing part
  • Dirt catching part comprises (in each case) of the annular region of the bearing part, the annular region of the waste collecting part radially outside.
  • the positive contours are arranged in the radial direction in the inner half of the radius of the bearing part and the waste collecting part.
  • the invention provides that the annular region of the bearing part, viewed in its circumferential direction, is designed to extend continuously or as a result of two or more ring sections. Its function of centering the dirt trap part of the ring area in each of the two aforementioned embodiments. Depending on the manner of producing the bearing part, one or the other embodiment may be more advantageous in terms of manufacturing technology.
  • the annular region of the dirt-trapping part can be designed to run continuously as seen in its circumferential direction or as a result of two or more ring sections.
  • An embodiment of the rotor provides that each annular portion of the waste collecting part at standstill of the rotor has a réelletell d its outer diameter, which is smaller than the inner diameter D or equal to the inner diameter D of the annular portion of the bearing part, and that upon rotation of the rotor during operation of the Centrifuge each ring portion of the waste collecting part in its outer diameter by centrifugal force on the diameter D is expandable.
  • the mounting and dismounting of the rotor is particularly easy because initially there is a mounting clearance according to the discloseddifferenz between the inner diameter D and the initial dimension d of the outer diameter or at least no excess of the outer diameter d relative to the inner diameter D.
  • each annular region of the waste-collecting part has a starting dimension d of its outer diameter when the rotor is at rest, which is greater than the inner diameter D of the annular region of the bearing part, and that after the axial attachment of the waste-collecting part to the bearing part Ring areas under bias with each other are engaged.
  • the diameter difference d-D is of course limited to those values at which even a trouble-free mating and separating of bearing part and dirt trap part is possible.
  • the bearing part at the top has a tubular, open-topped end portion as an annular region and that the dirt-catching member has a central, axially inwardly facing, engaging in the end collar as a ring area.
  • the collar protrudes into the tubular end portion;
  • annular portion forming the end portion and the annular region forming collar with cooperating, one for removing the waste trap detachable latching connection are equipped with forming locking means.
  • the latching connection is preferably manually detachable in order to dispense with actuation tools during maintenance in terms of ease of use and a quick removal and installation of the waste tray.
  • the collar forming the annular area preferably has two actuating arms projecting upwards beyond the dust-collecting part for a manual release of the latching connection.
  • a modified embodiment provides that the bearing part at the top has an annular, downwardly open attachment as an annular region and that the dirt-collecting part has at the top a central, axially outwardly facing collar engaging in the attachment as the annular region.
  • the attachment can be advantageously used at the same time to secure the rotor on the axis against unwanted axial movements.
  • the dirt-collecting part is embodied at the bottom in one piece with a central, axially outwardly pointing collar as a ring area.
  • This collar provided at the bottom of the dirt trap part is easy to produce, so that there is no appreciable additional production effort for this purpose either.
  • this axially outwardly facing collar in the lower part of the dirt catching part can be brought into and out of engagement with an associated annular region of the bearing part by simple axial movement of the dirt catching part relative to the bearing part.
  • a second solution of the above object is achieved according to the invention by a rotor of the type mentioned, which is characterized in that in addition to the torque transmission means of the bearing part and the dirt trap part are provided with the centering of the dirt trap part form-fitting contours that the positive contours are formed by a plurality of axial projections on the one hand and a plurality of corresponding recesses on the other hand and that the positive contours are arranged so that the contours of the waste tray already in its ground state or at its radial Expansion by centrifugal forces and / or heating to the correspondingly shaped contours of the bearing part lean or create by rotating the rotor, the projections or recesses of the dirt trap under the action of centrifugal the dirt trap part in its shape and relative to the bearing part centering in the radial outward direction put on the recesses or projections of the bearing part.
  • the bearing part and the dirt trap part form-fitting contours for the purpose of centering the dirt trap part instead of ring areas now alternatively formed by axial projections on the one hand and corresponding recesses on the other.
  • the projections and recesses may be concentric or eccentric to the axis of rotation of the rotor, as this is irrelevant to the function of the contours here.
  • the axial projections may be associated with the bearing part or the dirt trap part; Also, an assignment of the axial projections partly to the bearing part and partly to the dirt trap part is possible.
  • the corresponding openings are then respectively provided in the other part.
  • this embodiment has a special design freedom with respect to the position of the projections and recesses, which may be advantageous in some rotor designs.
  • the form-fitting contours formed by axial projections on the one hand and corresponding recesses on the other hand are arranged in the inner half, preferably even in the inner third, of the radius of the bearing part and the dirt trapping part.
  • the dirt trapping part comprises drive means for driving the rotor.
  • a related training proposes that the bearing part has a central tubular body with two radially outwardly extending openings and that the dirt trap part comprises two sealingly connected to the openings, each leading to a recoil nozzle oil passages.
  • the return nozzles are part of the dirt trap part, so that with each renewal of the dirt trap part in the course of maintenance of the centrifuge and new recoil nozzles are installed in the rotor, which is advantageous for reliable operation.
  • the bearing part comprises drive means for driving the rotor.
  • the bearing part is simultaneously the driving part of the rotor.
  • the bearing part comprises a central tube body forming a lubricating oil channel and two nozzle arms extending radially outward from the tube body, each having an oil passage leading to a respective recoil nozzle, and the positive contours of the bearing part being at least partially against the nozzle arms are trained or worn.
  • the dirt-catching part which is renewed during the maintenance of the centrifuge, can be produced in a particularly simple manner and thus also particularly cost-effectively, because it does not comprise any drive means.
  • the bearing part, which simultaneously forms the drive part here can be designed as a high-quality service life component and remain in the centrifuge for a long time.
  • the form-fitting contours of the bearing part can be integrated here on both spatially and manufacturing technology favorable way.
  • the form-fitting contours of the bearing part are additionally carried on radially extending from the tubular body to the outside supporting arms.
  • These support arms are provided in particular between the nozzle arms, in the circumferential direction of the bearing part at regular intervals and at several points a fixation of the positive contours, for example of the bearing part side Ring area, and so ensure its exact shape and position even over long periods of operation of the rotor.
  • the invention also proposes that the waste catching part consists of two injection molded parts which are integral with one another and which are tightly interconnected in a plane perpendicular to the axis of rotation of the rotor.
  • the two injection-molded parts of the waste collecting part are welded together.
  • This welding is particularly favorable if the plastic from which the two injection-molded parts of the waste-collecting part are made is a thermoplastic.
  • the plastic polyamide (PA) is suitable.
  • the tubular body with the nozzle arms and the ring support arms is a one-piece die-cast or injection molded part.
  • a material is here in particular a light metal, such as aluminum or magnesium to use advantageous.
  • materials which are correspondingly resilient and stable as material for this purpose e.g. Polyphenylene sulfides (PPS) or thermosets.
  • the subject of the present invention is furthermore a centrifuge which is characterized in that it has a rotor according to one of the preceding claims.
  • a centrifuge is particularly economical, reliable and quiet in operation.
  • the centrifuge has a centrifuge for cleaning the lubricating oil of an internal combustion engine, e.g. of a motor vehicle.
  • the centrifuge 1 according to FIG. 1 comprises a housing 10, whose upper part is formed by a screw-off cover 14.
  • the housing 10 has for this purpose an internal thread 11 into which an external thread 16 of the cover 14 engages.
  • a housing part 10 ' is used here, which has in its center an axle receptacle 12 with an internal thread.
  • an axis 5 is screwed by means of a lower threaded end 50. The axis extends upwards and is centered on the inside by means of an upper, separately pressed-in axle end 50 'in the cover 14.
  • a rotor 2 is rotatably supported by interposition of a respective lower and upper slide bearing 51, 52.
  • the rotor 2 consists of a central bearing part 3 and a detachably connected to the bearing part 3 dirt trap part 4.
  • the dirt trap part 4 can be withdrawn with the lid open 14 in the axial direction upwards from the bearing part 3 and replaced by a new dirt trap part 4. In this way, loaded dust collection parts 4 can be replaced regularly and in a simple manner.
  • the bearing part 3 is a lifetime component of the centrifuge 1 and remains permanently on the axis 5.
  • the bearing part here consists of metal.
  • the dirt trap part 4 made of plastic.
  • the dirt trap part 4 here consists of an upper part 41 and a lower part 42, which along a circumferentially continuous weld 40th are tightly welded together.
  • the lower part 42 of the waste collecting part 4 also comprises the drive means for the rotor 2, which are formed here by two oil passages 33 integrated into the lower part 42, each having a recoil nozzle 34 at its radially outer end.
  • the tubular body 30 of the bearing part 3 forms an upper annular region 35 in which an upper annular region 45 of the waste-collecting part 4 engages.
  • the annular region 45 of the waste-collecting part 4 is here formed by an axially downwardly pointing collar whose outer diameter corresponds to the inner diameter of the annular region 35 of the bearing part 3 or is slightly smaller than this.
  • known per se means the rotor 2 is secured on the axis 5 against an impermissible displacement in the axial direction upwards.
  • the bearing part 3 is designed with a lower annular region 36 in which an axially downward pointing second annular region 46 of the waste collecting part 4 engages radially inward.
  • the upper annular region 45 and the lower annular region 46 of the waste collecting part 4 lie in radial contact with the upper annular region 35 and the lower annular region 36 of the bearing part 3 as a result of the centrifugal force a dimensionally stable metal, results in this way an exactly centered orientation of the dust collecting part 4 relative to the bearing part 3 and thus also relative to the axis of rotation 20 of the rotor 2, which leads to a good concentricity of the rotor, even if the dirt trap part 4 of a less dimensionally stable Material, in particular plastic, consists.
  • a known per se minimum pressure valve 7 is provided in the lower part of the axis 5 and opens or closes according to the respectively applied lubricating oil pressure an inlet 18 which is centrally provided in the housing part 10 'below the lower axis end 50 of the hollow axis 5.
  • lubricating oil flows through the inlet 18 into a central passage 53 penetrating the axis 5 in the longitudinal direction thereof.
  • the lubricating oil flow is then divided into two partial lubricating oil streams.
  • a first partial flow flows through at least one first radial channel 54.1 from the region immediately above the minimum pressure valve 7 in the radial outward direction and further through two radial openings 32 through the bearing part 3 radially from the inside to the outside, finally, in two congruent with the radial openings 32 aligned oil passages 33 which lead to the recoil nozzles 34.
  • This annular channel 30 ' is bounded radially inwardly by the outer circumference of the axis 5 and radially outwardly by the inner circumference of the tubular body 30 of the bearing part 3.
  • Immediately below the upper slide bearing 52 at least one running in the radial direction, designed here as a bore oil inlet 44 from the annular gap 30 'in the interior of the waste collecting part 4.
  • the lubricating oil to be cleaned then flows through the waste trap part 4 in the axial direction from top to bottom;
  • an oil outlet 47 which is not completely visible here, is provided radially inwardly, through which the cleaned lubricating oil passes into a pressureless oil-drainage region 13 of the housing 10.
  • the upper slide bearing 52 is supplied by at least one channel not shown here with lubricating oil, as is well known.
  • 10 ' are either on the top of the housing part, as in the right half of FIG. 1 represented, deflecting ribs 17 or, as in the left half of FIG. 1 shown, a parallel to the top of the housing part 10 'extending shielding plate 17' is provided.
  • FIG. 2 shows a rotor 2 of a centrifuge in a relation to the FIG. 1 modified version, with in FIG. 2 the bearing part 3 and the dirt trap part. 4 are shown during their assembly or separation in an only partially assembled state in a perspective view.
  • the lower portion of the bearing part 3 can be seen.
  • the upper, central region of the bearing part 3 is formed by the tubular body 30, which lies here partly in the waste collecting part 4. Near the lower end go from the tubular body 30 in two opposite radial directions from two nozzle arms 31, which are each equipped with a separately mounted recoil nozzle 34 at its end.
  • the lower annular region 36 of the bearing part 3 is held on the two nozzle arms 31 as well as on two support arms 36 arranged between the nozzle arms 31.
  • the annular region 36 here has the shape of a circular disk with a radially inwardly facing, circumferential inner peripheral surface.
  • the dirt trap part 4 of the rotor 2 visible, which is connected by axial plugging with a displacement direction from top to bottom relative to the bearing part 3 with this.
  • the waste collecting part 4 in the axial direction down the lower ring portion 46 of the waste collecting part 4 engages with the lower ring portion 36 of the bearing part 3.
  • the annular region 46 which is formed here from a total of four sections 46 'adjoining each other at a small distance, abuts against the inner circumferential surface of the annular region 36 of the bearing part 6 and is exactly centered by it in its position. In the process, this centering is even further improved during rotation of the rotor 2 during operation of the centrifuge 1, because the centrifugal forces which occur ensure an exact contact of the outer peripheral surface of the annular region 46 of the waste collecting part 4 on the inner peripheral surface of the annular region 36 of the bearing part 3.
  • the dirt-collecting part 4 consists of the upper part 41 and the lower part 42, which are connected tightly and permanently to one another along the weld 40.
  • FIG. 3 is an enlarged sectional view of the lower portion of the rotor 2 from FIG. 2 in its final assembled state shown in longitudinal section.
  • the center of the bearing part 3 of which only the lower portion of the tubular body 30 is visible here.
  • one of the nozzle arms 31 is visible with the extending through this oil passage 33.
  • the cut does not pass through the second nozzle arm, because the cutting direction is here about the axis of rotation 20 of the rotor 2 (see. FIG. 1 ) is twisted in the circumferential direction.
  • FIG. 3 in that the nozzle arms 31 lie over part of their length in the lower part 42 of the waste collecting part 4, whereby in a simple manner a rotationally secure positioning of the waste collecting part 4 and the storage part 3 relative to one another in the fully assembled state is achieved. This unwanted relative movements of the bearing part 3 and the dust collecting part 4 relative to each other in the circumferential direction can not occur.
  • FIG. 4 shows a further rotor 2 in a longitudinal section. Again, the rotor 2 consists of the central bearing part 3 and the associated dirt trap part. 4
  • the bearing part 3 here also has a central tubular body 30, the upper end of which is provided as the upper annular region 35 and the lower annular region 36 is provided at its lower end region.
  • the dirt trap part 4 also consists of two parts, namely the cup-shaped upper part 41 and the lower part 42, which are connected to each other along the weld 40.
  • an axially inwardly pointing collar is formed as the upper annular region 45 of the waste collecting part 4, which engages in the upper annular region 35 of the bearing part 3 radially inward.
  • a rolling bearing as the upper bearing 52 disposed in the interior of the tubular body 30.
  • the oil inlet 44 is formed, which serves to introduce the lubricating oil to be cleaned into the interior of the waste collecting part 4.
  • an axially downwardly pointing collar is integrally formed as a lower annular region 46.
  • the lower ring portion 46 of the lower part 42 is radially inward on the inner circumference of the lower ring portion 36 of the bearing part 3 at.
  • the dirt trap part 4 is exactly centered above and below relative to the bearing part 3. Since the in itself very dimensionally stable bearing part 3 is mounted exactly centered relative to the axis of rotation 20, and the dust collecting part 4 is exactly centered about the axis of rotation 20 of the rotor 2.
  • FIG. 5 shows in enlarged scale the in FIG. 4 circled lower area V.
  • the lower part of the bearing part 3 with the tubular body 30 can be seen.
  • one of the radial openings 32 can be seen, which leads into one of the two oil channels 33 which extend through the nozzle arms 31.
  • the ring portion 36 of the bearing part 3 is visible in section.
  • the lower part of the waste collecting part 4 Radially outward from the bearing part 3 is the lower part of the waste collecting part 4, which has radially inwardly the axially downwardly facing lower annular portion 46 as integrally formed on the lower part 42 collar.
  • the annular region 36 has an inner diameter D which is adapted to the outer diameter d of the annular region 46.
  • the outer diameter d of the annular portion 46 may also in its ground state at standstill of the rotor 2 have a dimension that is smaller by a mounting clearance than the inner diameter D; the centrifugal force during rotation of the rotor 2 then causes an expansion of the outer diameter d to the inner diameter D.
  • FIG. 6 shows in enlarged scale the in FIG. 4 circled upper area VI. Also here is in the center of FIG. 6 the bearing part 3, now with the upper portion of its tubular body 30. The upper end of this tubular body 30 forms the upper ring portion 35 of the bearing part. 3
  • the upper ring region 45 of the upper part 41 of the dirt-collecting part 4 cooperates with the annular region 35, the outer circumference of the annular region 45 also bearing against the inner circumference of the annular region 35.
  • the system upon rotation of the rotor 2 (see. Fig. 4 ) positively influenced by the occurring, acting on the dust collecting part 4 centrifugal force in terms of their accuracy.
  • the upper bearing 52 is arranged in the form of a rolling bearing. Under the rolling bearing 52 is the inlet 44 through which the lubricating oil to be cleaned enters the interior of the waste collecting part 4.
  • radially spaced guide walls 48 are provided here in the circumferential direction and are spaced apart radially from the tubular body 30 of the storage part 3.
  • latching means 39, 49 visible, which serve the latching part 4 latching, but manually releasably connected to the bearing part 3.
  • actuating arms 49 ' projecting upwards over the top of the upper part 41 of the waste collecting part 4, wherein in the section in FIG. 6 only one of these actuating arms 49 'can be seen.
  • FIG. 7 finally shows the upper portion of the rotor 2 according to FIG. 4 in a perspective, partially cut representation.
  • the upper portion of the bearing part 3 can be seen, here its tubular body 30 with the inlet 44 for the passage of the lubricating oil into the interior of the waste collecting part 4th
  • FIG. 7 In the upper right area of FIG. 7 is a part of the upper part 41 of the waste collecting part 4 recognizable, wherein the upper part 41 is cut open here to make visible in the interior of the waste collecting part 4 bearing part 3.
  • the upper end of the tube body 30 is formed with the upper ring portion 35, in which the upper ring portion 45 of the waste collecting part 4 engages.
  • the latching means already mentioned above are specifically formed here by a latching groove 39 formed in the inner circumference of the annular region 35 and by a latching bead 49 matching the latching groove 39 on the outer circumference of the annular region 45 of the dirt catching part 4.
  • the two actuating arms 49 protrude through the upper part 41 of the waste collecting part 4.
  • the detent bead 49 comes out of the associated detent groove 39 and the debris portion 4 can be smoothly withdrawn axially upward from the bearing member 3 to exhaust during servicing of the centrifuge , To exchange with dirt particles loaded dust collection part 4 against a fresh dirt trap part 4.
  • bearing part 3 provided on this positioning means 6 which here have the form of two axially extending, recessed grooves on the outer circumference of the tubular body 30.
  • two mutually running inlet bevels 61 are formed, which serve to position the waste collecting part 4 and the bearing part 3 when they are assembled in the circumferential direction in relation to each other to push them then in the axial direction in the final mounting position.
  • the latching means 39, 49 engage and the dust collecting part 4 is then secured in this position on the bearing part 3 both in the axial direction and in the circumferential direction.
  • FIG. 8 shows an example of a centrifuge 1 in longitudinal section, in which the rotor 2 is composed of a bearing and drive part 3 and a dirt-collecting part 4 connected thereto.
  • the centrifuge 1 here also comprises a housing 10, which is closed on the upper side with a screw cap 14.
  • the screw cap 14 has an external thread for this purpose 16, which fits into a not shown here internal thread of the housing 10.
  • the rotor 2 is rotatably mounted on the axis 5.
  • the axle 5 is screwed with a lower threaded end 50 in an axle 12, which is centrally mounted in a housing part 10 '. With its upper end 50 ', the axis 5 engages centering in a suitable recess on the inside of the lid 14 a.
  • each nozzle arm 31 runs an oil passage 33 which opens at the radially outer end of each nozzle arm 31 in a respective recoil nozzle 34.
  • the dirt trap part 4 is also in this embodiment in two parts composed of an upper part 41 and a lower part 42, which are sealed together along a weld 40. Inside the dirt trap part 4, as in the left half of FIG. 8 is indicated, spaced apart in the circumferential direction, to be provided in the radial direction guide and partition walls 48, which are embodied here in one piece with the outer peripheral wall of the upper part 41 and the free end radially in the vicinity of the outer periphery of the tubular body 30.
  • the upper part 41 has an axially upwardly pointing collar which forms an annular region 45. Radially outwardly, this annular region 45 of the waste-collecting part 4 is surrounded by an annular region 35 of the bearing and drive part 3.
  • the ring portion 35 is formed here as a separate attachment in a ring shape, which is mounted with the interposition of an upper roller bearing 52 on the upper axle end 50 '. Due to the dimensionally stable annular region 35, the annular region 45 of the labileren, made of plastic dust collecting part 4 is centered, with a rotation of the rotor 2, this centering is still improved by the occurring, acting on the annular region 45 centrifugal forces.
  • a second portion of lubricating oil flows up through the annular channel 30 'and passes through a throttle point 37 and through at least one inlet 44 into the interior of the waste collecting part 4 near its upper end.
  • This second partial flow of lubricating oil flows through the waste collecting part 4 substantially from top to bottom and then exits through a bottom and radially inner outlet 47 from the waste collecting part 4.
  • the dirt collecting part 4 collects radially outside due to the centrifugal forces occurring in the lubricating oil supplied dirt particles and are thus separated from the lubricating oil.
  • the upper axle end 50 can be pulled off in the axial direction upward together with the roller bearing 52 provided above and the bearing seat 52 on the outside of the bearing 52, forming the annular region 35. Together with or thereafter, the waste collecting part 4 can also be separated from the storage and drive part 3 by axial withdrawal upwards and replaced by a fresh waste collecting part 4. After placing the upper axle end 50 'with the bearing 52 and the ring portion 35 and after screwing the lid 14, the centrifuge 1 is ready for use again.
  • FIG. 9 shows an enlarged section of the upper area of FIG. 8 ,
  • Right in FIG. 9 is the axis of rotation 20 of the rotor indicated. To the left of this, part of the axle 5 and the upper axle end 50 'placed thereon are visible. On the upper axle end 50 'sits the bearing 52 and radially outward on this turn the essay with the ring portion 35th
  • the upper end region of the tubular body 30 is visible, which protrudes with its upper end into the annular region 45 of the upper part 41 of the waste collecting part 4.
  • Radially inside of the tubular body 30 is the annular channel 31 '.
  • the annular region 45 of the upper part 41 projects radially inward into the annular region 35 and is centered by the latter.
  • annular regions 35 and 45 are provided with cooperating locking means 39 and 49.
  • These locking means engage with each other when the upper axle end 50 'with the bearing 52 and the annular portion 35 in the axial direction from top to bottom on the upper part 41 and its annular portion 45 is placed.
  • the upper axle end 50 is withdrawn with the bearing 52 and the ring portion 35 in the axial direction upwards, this is also the dirt catcher part 4 taken up with, because about the locking means 39 and 49 axial tensile forces can be transmitted.
  • annular regions 35 and 45 also serve to center the dirt-collecting part 4 during the rotation of the rotor during operation of the centrifuge.
  • the form-fitting cooperating, the centering of the waste tray part 4 serving contours are each formed by annular areas on the bearing part 3 and the dust collecting part 4.
  • the form-fitting contours on the bearing part 3 and the dirt trapping part 4 by axial projections on the one hand and correspondingly arranged openings on the other hand are formed, with different designs and arrangements are possible.
  • a total of four circular openings or holes 36.1 are provided on the bearing part 3 in the lower region, which may have different diameters, such as FIG. 10 by way of example, and which may also lie at different radii relative to the central axis of the bearing part 3.
  • the openings 36.1 mounted in a form of a circular disk having lower portion of the bearing part 3.
  • Top in FIG. 10 is still a part of the tubular body 30 visible; Left and right in FIG. 10 are the nozzle arms 31, which are not equipped here with the associated nozzles.
  • FIG. 11 shows in view obliquely from below the lower part 42 of the rest of the dirt trap part, not shown here, which corresponds to the bearing part 3 according to FIG. 10 fits.
  • On the underside are on the lower part 42 according to FIG. 11 a total of four projections 46.1 projecting in the axial direction downward in the form of cylindrical pins, preferably in one piece with the rest of the lower part 42.
  • the position and dimensions of the projections 46.1 are chosen such that they correspond to the apertures 36.1 in the bearing part 3 FIG. 10 fit.
  • the projections 46.1 apply under the effect of centrifugal force in the radial direction outwardly to the openings 36.1 and are thus fixed in position, whereby unwanted deformations of the lower part 42 and thus of the entire dirt trap part can be avoided.
  • FIG. 12 shows in the same representation as in FIG. 10 a modified version of the bearing part 3.
  • the modification here is that in the example FIG. 12 now three mutually identical, circular openings 36.1 are arranged in the lower region of the bearing part 3.
  • all openings 36.1 are mounted on a uniform radius and circumferentially evenly spaced from each other.
  • FIG. 13 shows that to the bearing part 3 according to FIG. 12 matching lower part 42 of the waste collecting part.
  • At the bottom of the lower part 42 are congruent to the openings 36.1 three axially projecting downwardly projecting projections 46.1 integrally formed in the form of cylindrical pins.
  • FIG. 14 shows the bearing part 3 in a relation to the FIG. 12 slightly modified form.
  • the modification consists in that in the bearing part 3 according to FIG. 14 the openings 36.1 are not circular, but have in the radial direction outwardly converging bevels, whereby in conjunction with the centrifugal force a centering effect on the openings 36.1 engaging in the projections 46.1 (see FIG. 13 ) is exercised.
  • a reverse arrangement is given as an example in the FIGS. 15 and 16 shown.
  • the lower portion of the bearing part 3 also forms a section in the form of a circular disk, which is designed in one piece with the rest of the bearing part 3. This section is connected in one piece to the tube body 30 both via the nozzle arms 31 and via two support arms 36 'arranged between them.
  • On the form of the annular disc having portion of the bearing part 3 a total of four projections 36.2 are arranged projecting in the form of cylindrical pin upwards, in which case one of these projections 36.2 is behind the tubular body 30 and therefore not visible.
  • the projections 36.2 of the bearing part 3 are arranged on a uniform radius and have circumferentially equal distances, here in each case 90 ° from each other. In addition, here the projections 36.2 are identical to each other in diameter and height.
  • FIG. 16 shows in view obliquely from below a matching lower part 42 of a waste collecting part. According to the arrangement and the diameter of the projections 36.2 of the bearing part 3 in FIG. 15 are in the lower part according to FIG. 16 four openings 46.2 formed.
  • FIGS. 10 to 16 Join the projections 46.2 and 36.2 of the lower part 42 and bearing part 3 with the openings 36.1 and 46.1 on the bearing part 3 and lower part 42 in their axial mating engagement.
  • the contours 46.1 or 46.2 provided on the lower part 42 of the waste catch part are subject to the positionally stable contours 36.1 or 36.2 provided correspondingly on the bearing part 3, with the effect of centrifugal force and / or heat, whereby the lower part 42, independently of the respective design and thus the dirt trap part 4 is centered in its shape and relative to the bearing part 3.

Landscapes

  • Centrifugal Separators (AREA)
EP06753442A 2005-05-02 2006-04-28 Rotor für eine zentrifuge Active EP1877193B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202005007162U DE202005007162U1 (de) 2005-05-02 2005-05-02 Rotor für eine Zentrifuge
PCT/EP2006/003962 WO2006117141A1 (de) 2005-05-02 2006-04-28 Rotor für eine zentrifuge

Publications (2)

Publication Number Publication Date
EP1877193A1 EP1877193A1 (de) 2008-01-16
EP1877193B1 true EP1877193B1 (de) 2011-02-23

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ID=36616808

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EP06753442A Active EP1877193B1 (de) 2005-05-02 2006-04-28 Rotor für eine zentrifuge

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US (1) US8002690B2 (pt)
EP (1) EP1877193B1 (pt)
CN (1) CN101247894B (pt)
AT (1) ATE499155T1 (pt)
BR (1) BRPI0611541B1 (pt)
DE (2) DE202005007162U1 (pt)
WO (1) WO2006117141A1 (pt)

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DE202005007162U1 (de) * 2005-05-02 2006-09-21 Hengst Gmbh & Co.Kg Rotor für eine Zentrifuge
DE202005014427U1 (de) 2005-09-12 2007-02-01 Hengst Gmbh & Co.Kg Zweiteiliger Rotor für eine Zentrifuge und Zentrifuge mit einem solchen Rotor
DE202006015601U1 (de) * 2006-10-12 2008-02-21 Hengst Gmbh & Co.Kg Rotor für eine Zentrifuge
DE202007010792U1 (de) * 2007-08-01 2008-12-11 Hengst Gmbh & Co.Kg Abscheider zum Abscheiden von Ölnebel aus dem Kurbelgehäuseentlüftungsgas einer Brennkraftmaschine und Brennkraftmaschine mit einem Abscheider
JP5442337B2 (ja) * 2009-06-30 2014-03-12 株式会社久保田製作所 遠心分離機、遠心分離機用ロータ
DE102010002784A1 (de) * 2010-03-11 2011-09-15 Hengst Gmbh & Co. Kg Ölnebelabscheider und Brennkraftmaschine mit einem Ölnebelabscheider
US11654385B2 (en) 2015-09-24 2023-05-23 Cummins Filtration Ip, Inc Utilizing a mechanical seal between a filter media and an endcap of a rotating filter cartridge
US20170089586A1 (en) * 2015-09-30 2017-03-30 General Electric Company Gas knob alignment brackets
EP3320977B1 (en) * 2016-11-14 2021-07-07 Alfdex AB Housing for a centrifugal separator
CN106902990A (zh) * 2017-02-28 2017-06-30 唐凌霄 从动离心单元及其固液分离设备
WO2018236921A1 (en) 2017-06-20 2018-12-27 Cummins Filtration Ip, Inc. CENTRIFUGAL SEPARATOR WITH AXIAL FLOW
JP7141545B2 (ja) * 2019-11-21 2022-09-22 エッペンドルフ・ハイマック・テクノロジーズ株式会社 遠心機用ロータ及び遠心機
CN113522540B (zh) * 2021-09-13 2022-02-18 深圳市瑞沃德生命科技有限公司 一种转子及具有其的离心机

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DE202005020012U1 (de) * 2005-12-22 2007-05-10 Hengst Gmbh & Co.Kg Zentrifuge zum Reinigen einer Flüssigkeit

Also Published As

Publication number Publication date
BRPI0611541B1 (pt) 2018-03-06
CN101247894A (zh) 2008-08-20
US8002690B2 (en) 2011-08-23
BRPI0611541A2 (pt) 2010-09-21
DE202005007162U1 (de) 2006-09-21
ATE499155T1 (de) 2011-03-15
WO2006117141A1 (de) 2006-11-09
US20090272680A1 (en) 2009-11-05
EP1877193A1 (de) 2008-01-16
CN101247894B (zh) 2013-10-23
DE502006008945D1 (de) 2011-04-07

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