EP1602410B1 - Free jet centrifuge for cleaning lubricating oil of an internal combustion engine - Google Patents

Abstract

A pulse centrifuge (1) has a housing (10) with a removable lid (14), a rotor (2) with a drive piece (3), and a contaminant trap piece (4). The drive piece runs upward into or through the contaminant trap piece, so that the drive piece comprises all the components for rounding of the rotor, and is itself securely mounted, so that it cannot be withdrawn axially with the lid open.

Description

The present invention relates to a free-jet centrifuge for cleaning the lubricating oil of an internal combustion engine, with a housing which is closed with a removable lid, with a rotor rotatably mounted in the housing and with channels for supplying the to be cleaned, pressurized lubricating oil and for discharging the cleaned, pressureless lubricating oil, wherein the rotor is made of plastic and integrally or with firmly interconnected parts, wherein the rotor has at least one recoil nozzle and a dirt collection area and wherein the rotor for disposal with the lid open can be completely removed from the housing.

In this case, the centrifuge has means for dividing the supplied lubricating oil flow in a first and a second partial flow and the rotor comprises a recoil nozzle (s) comprehensive drive part, which is flowed through by the first partial flow of lubricating oil, and a dirt collecting portion comprising the dirt collecting part of the second lubricating oil partial stream can be flowed through.

A free-jet centrifuge of the type described above is out EP 1 071 512 B1 known. The rotor is here completely designed as a disposable part, which is removed from the centrifuge during regular maintenance and replaced by a fresh rotor. So that the rotor can be easily disposed of, in particular thermally recycled, this consists entirely of a readily combustible plastic. During operation of this known free-jet centrifuge, the full flow of lubricating oil flowing through the centrifuge first flows through the Dirt collection area of the rotor and then through the recoil nozzles.

Further, the document shows EP-A-1 340 547 a centrifuge rotor and the document EP-A-1 287 895 shows a centrifuge with a rotor and with a liquid flow distribution on the inlet side in a partial flow to a drive part and a partial flow to a waste trap part. The part of the flow through the dirt trap part is then transferred to the drive part and reunited there with the other, directly in the drive part guided partial flow. The total flow then exits the rotor through the recoil nozzles.

In these known centrifuges is disadvantageous that the interior of the rotor including its dirt collecting area is under the full lubricating oil pressure. This makes special reinforcing measures on the rotor made of plastic required to withstand the high oil pressure in the long term harmless can.

In view of this prior art, therefore, the object is to provide a free-jet centrifuge, in which a rotor made entirely of plastic is exposed to lower loads by the lubricating oil pressure.

The solution of this object is achieved according to the invention with a free-jet centrifuge of the type specified, which is characterized in that the drive part can only be flowed through by the first partial flow of lubricating oil, that the second partial flow of lubricating oil from the dirt trap part directly in a pressurized area in the interior of the housing is feasible the pressure level on the one hand in the drive part and on the other hand in the waste trap part can be adjusted separately from each other.

In particular, there is the advantageous possibility to set a lower pressure of the lubricating oil in the waste collecting part, whereby the associated with the lubricating oil pressure high forces acting from the inside on the rotor, can be substantially reduced. It is now only compared to the Dirt trap part much smaller executable drive part under the full lubricating oil pressure, which represents a significant simplification in terms of design. At the same time, however, an effective drive is maintained, because this the full lubricating oil pressure remains usable. Thus, the rotor can be made lighter and with less material, resulting in cost savings in manufacturing and higher speeds in the operation of the rotor.

In a further embodiment of the free-jet centrifuge according to the invention it is proposed that the rotor has a one-piece upper part, an integral lower part and at least one intermediate wall disposed therebetween, which are connected, preferably welded, and that the upper part and the intermediate wall include the dirt collecting area and the lower part and the intermediate wall form the drive part. Advantageously, only the intermediate wall is required for the oil-side distribution of the rotor in the dirt collecting part on the one hand and the drive part on the other hand, resulting in a simple production of the rotor. Ideally, a single welding area is sufficient for the connection of the upper part and the lower part and intermediate wall, which is a further contribution to a simple and thus cost-effective production of the rotor.

According to a further embodiment, it is preferably provided that the upper part comprises a radially inner and a radially outer annular wall and an upper-side cover wall, that the radially inner annular wall with its hollow interior forms a channel for the lubricating oil partial stream to be supplied to the waste collecting part and that the radially inner wall in its upper region has at least one passage opening from the channel in the dirt collecting area. By using a radially inner and radially outer annular wall for the shell this gets a high basic stability. At the same time, the hollow interior of the radially inner annular wall is used as a channel for the supply of the lubricating oil partial stream to be cleaned to the waste collecting part. Due to the position of the transfer opening in the upper region of the radially inner wall of the oil partial stream to be cleaned as far as possible is introduced into the dirt trap area and thus lays a long way back through the dirt trap area, which is favorable for the Schmutzpartikelausscheidung from the oil.

In a further embodiment, again in the sense of a compact design as possible, preferably provided that the lower part has a central inlet for the entire centrifuge supplied lubricating oil flow that leads from the inlet a first opening with a defined cross-section through the partition in the channel and that from the inlet at least one second aperture of defined cross-section leads into at least one nozzle chamber formed between the intermediate wall and the lower part. In this embodiment, all means for the division of the supplied lubricating oil flow in the part of the dirt trap on the one hand and the drive part on the other hand flowing part streams are arranged within the rotor. Outside the rotor no further means for the distribution of the oil flow are needed. By determining suitable cross sections of the two openings a desired quantitative distribution of the partial flows for the dirt trap part and for the drive part in a simple manner possible.

In order to avoid expensive to produce outer channels on the rotor, it is further preferably provided that the lower part on the upper side a low, congruent with the radially inner annular wall of the upper part extending Has annular wall and that the second opening extends radially through the annular wall of the lower part. The specific for the drive part oil partial flow can be supplied from the centrally located inlet on the shortest path through the second opening the drive part. If necessary, a plurality of apertures can be arranged distributed over the circumference of the low annular wall.

In order to be able to discharge the cleaned lubricating oil from the dirt-catching part of the rotor as simply as possible and with the lowest possible flow resistance, it is preferably provided that the intermediate wall is made in one piece with at least one pipe-outlet-type oil outlet channel which extends from a radially inner part of the dirt collecting area through the / a nozzle chamber leads to the bottom of the rotor and whose cross section is greater than the cross section of the first opening and the transfer opening (s). Due to the one-piece design of the intermediate wall with the Ölauslaßkanal the construction of the rotor remains simple and it suffice in the best case, three items to form the complete rotor. By in relation to the cross section of the first opening larger cross-section of the oil outlet channel can build up no oil pressure in the dirt trapping part of the rotor, so that the desired low pressure in the waste collecting part of the rotor is ensured. Only in the drive part, which has a much smaller volume in relation to the dirt trap part, the full lubricating oil pressure prevails, but due to the small volume of the drive part can be easily absorbed by the parts of the rotor, which form the drive part. In the drive part, the return nozzles form the region of the smallest cross section in the flow of the lubricating oil part stream flowing through the drive part, whereby a high drive power for the rotor is ensured.

In terms of the simplest possible structure of the rotor is further preferably provided that the intermediate wall is made in one piece and extending in a plane between the upper part and lower part. Thus, the rotor comprises only three parts to be joined, in which case advantageously the joining of the parts can take place in a single plane extending in the radial direction.

Alternatively, it is proposed that the intermediate wall is made in two parts and that extends a radially outer part of the intermediate wall in a first plane and a radially inner part of the intermediate wall in a second plane between the upper part and lower part. In this embodiment, although the rotor has an item more, but hereby greater freedom in terms of design, in particular the drive part is achieved.

In order to produce the rotor, in particular its most part of the rotor engaging dirt catcher part, with the lowest possible material thickness, without causing the risk of damage, is preferably provided in another embodiment that in the dirt catching part pointing in the radial direction, uniformly in the circumferential direction of the rotor spaced guide and partitions are provided which are integral with the upper part. The guide and partition walls provide stiffening of the dirt trap part, in particular its radially outer peripheral wall, which is acted upon by the centrifugal forces arising during rotation of the rotor. The one-piece design of the control and partitions with the rest of the rotor ensures ease of manufacture and no additional assembly steps are required for the baffles and partitions. Finally, the guide and partitions ensure that during the acceleration of the rotor, the lubricating oil therein is rapidly accelerated without slippage, so that the centrifugal force used for the separation of dirt particles is very quickly effective.

Another measure with regard to the simplest possible design of the rotor is that at the bottom and top of the rotor each have a central stub shaft mounted for rotatable mounting of the rotor or integrally formed. The stub shafts can be advantageously made in one piece with the upper part or the lower part of the rotor, so that no special manufacturing and assembly steps are necessary for this purpose.

Another embodiment of the centrifuge provides, instead of the stub shaft, that the rotor has in its center an axially continuous, up and down or only downwardly open cavity, that passes through the cavity for rotatably supporting the rotor, a housing-fixed axis and that between the axis and the rotor bearings are arranged, which remain in the removal of the rotor from the housing on the axis. Also in this embodiment, the rotor remains very simple in construction and is therefore inexpensive to produce. Again, the rotor is completely disposable, the bearings for the storage of the rotor when replacing the rotor remain on the fixed in the housing of the centrifuge axis and continue to be used for the new rotor. It is therefore disposed of here also in the maintenance of the centrifuge only the rotor made of plastic together with the dirt particle cake deposited therein. The axis with the Storage remains as a lifetime component in the centrifuge.

For the above-described embodiment of the free-jet centrifuge is preferably provided in a further embodiment that passes through the housing fixed axis an oil inlet forming portion of an oil supply passage that of the oil inlet through at least one provided in the axis first transition opening with a defined cross-section of the first partial flow of lubricating oil in the dirt collection area is feasible and that from the oil inlet through at least one provided in the axis second crossing opening with a defined cross-section of the second partial flow of lubricating oil is feasible in the drive part. In this embodiment, the means for dividing the lubricating oil flow supplied to the centrifuge are integrated into the two partial flows for the waste collecting part and the drive part in the axis provided on the housing side. The rotor must therefore not have these means and can be of a correspondingly simple design.

Finally, a development of the above-mentioned centrifuge provides that a lower bearing of the rotor is formed by a sliding bearing with a bearing bushing placed on the axle, that downstream of the second crossing opening of the axis in the bearing bush at least one leading into the drive part further passage opening is provided and that the rotor is sealed with a central lower, sleeve-shaped region in the sliding seat mounted on the bearing bush. The flow path for the lubricating oil partial flow to the drive part extends through the bearing bush and thus through the lower sliding bearing of the rotor, whereby its effective lubrication is reliably ensured. Furthermore, the rotor sits here by means of its lower, sleeve-like shaped area tight and mechanically strong enough on the bearing bush, so that an undesirable vertical play of the rotor during operation of the centrifuge is sufficiently prevented. During maintenance, the rotor can be removed from the bearing bush manually or by means of an auxiliary tool.

Figur 1

den kompletten Rotor für eine Zentrifuge, in einer ersten Ausführung, im Längsschnitt,

Figur 2

den Rotor aus Figur 1 in einer abgewandelten Ausführung, wieder im Längsschnitt,

Figur 3

den Rotor aus Figur 2 in einem Querschnitt gemäß der Linie C-C in Figur 2 und

Figur 4

eine komplette Zentrifuge, hier wieder im Längsschnitt.

In the following embodiments of the invention will be explained. The figures of the drawing show:

FIG. 1

the complete rotor for a centrifuge, in a first embodiment, in longitudinal section,

FIG. 2

off the rotor FIG. 1 in a modified version, again in longitudinal section,

FIG. 3

off the rotor FIG. 2 in a cross section along the line CC in FIG. 2 and

FIG. 4

a complete centrifuge, here again in longitudinal section.

The in the FIGS. 1 to 4 illustrated embodiments have in common that they have a mechanically integral rotor 2, but the rotor 2 functionally each have a drive part 3 and a dirt trap part 4, which are each traversed by its own lubricating oil partial stream.

At the in FIG. 1 illustrated embodiment, the rotor 2 has an upper part 22 and a lower part 23 and an intermediate wall 24 arranged between these, these three parts are sealingly connected together and thus form the one-piece rotor 2. Preferably, the individual parts 22-24 of the rotor 2 are made a thermoplastic material and are welded together.

The upper part 22 of the rotor 2 has radially outside a peripheral wall 40, radially inwardly an inner wall 43 and axially above an upper wall 41, which together form a one-piece injection-molded part. From the top of the upper wall 41 projects also integrally formed with the upper part 22 stub shaft 5 '', which serves for the rotatable mounting of the rotor 2 in the housing, not shown here, of the centrifuge.

In the interior of the dirt collecting part 4, a dirt collecting area 4 'is formed, which serves to receive dirt particles from the centrifuged lubricating oil. The supply of the lubricating oil in the waste collecting part 4 takes place through the channel 30 'in the interior of the radially inner wall 43, which is connected via a plurality of radially extending oil inlets 44 with the dirt collecting area 4'. In addition, in the interior of the waste collecting part 4 extending in the radial direction and circumferentially spaced guide and partitions 48 are arranged, which are also integral with the upper part 22.

In the lower part of the rotor 2 below the intermediate wall 24 of the drive part 3 is formed. The drive part 3 consists of the lower part 23 and the intermediate wall 24. In the space between the lower part 23 and the intermediate wall 24, two nozzle chambers 34 'are formed, which are each connected to a recoil nozzle 34 for driving the rotor 2.

The supply of the lubricating oil to the rotor 2 takes place centrally from below through the oil inlet 18 in the center of the lower part 23. This oil inlet 18 is in the form of a pipe socket formed, which simultaneously forms a downwardly projecting lower stub shaft 5 'for the rotatable mounting of the rotor 2.

In its upper region, the oil inlet 18 is connected to the previously mentioned channel 30 'for supplying the lubricating oil to be cleaned to the dirt collecting part 4 via a first opening 24. 1 extending in the axial direction through the intermediate wall 24.

Via a radially extending second opening 24.2 of the inlet 18 is connected to the nozzle chambers 34 '. The radial opening 24.2 extends through a low annular wall 30.1, which is formed integrally with the lower part 23 and extending from this dekkungsgleich with the inner wall 43 of the upper part 22 upwards. The lower end of the radially inner wall 43 of the upper part 22 and the axially upper end of the annular wall 30.1 of the lower part 23 each abut sealingly against the upper side or lower side of the intermediate wall 24.

Further, the intermediate wall 24 is still designed with at least one integrally formed, through one of the nozzle chambers 34 'downwardly extending tubular member which forms an oil outlet 47 for the purified lubricating oil.

As the FIG. 1 clearly shows, the cross section of the first opening 24.1 is smaller than the cross section of the second opening 24.2. For the first, flowing through the dirt trap part of the oil flow, the first opening 24.1 forms a throttle point at which the oil pressure is reduced, after which the oil in the interior of the waste collecting part 4 is depressurized. For this purpose, the inlets 44 and the outlet 47 for the first partial oil flow with a ratio executed for the first opening 24.1 larger cross-section.

For the second partial oil flow, the return nozzles 34 form a throttle point, since the cross-section of the nozzles 34 is smaller than the cross section of the second opening 24.2, which leads the second partial oil flow in the nozzle chambers 34 '. This is in the nozzle chambers 34 'and the nozzles 34 of the full lubricating oil pressure and for the drive of the rotor 2 available.

Like from the FIG. 1 Finally, it can be seen, the intermediate wall 24 extends here as a one-piece wall in a single radial plane through the lower part of the rotor. 2

FIG. 2 shows a modified in this regard embodiment of the rotor 2, in which now the intermediate wall of two intermediate wall parts 24 and 24 'is formed. A radially outer intermediate wall part 24 lies in one of the position of the intermediate wall 24 according to FIG. 1 corresponding position between the upper part 22 and the lower part 23 of the rotor 2. In contrast to the example according to FIG. 1 is in the example according to FIG. 2 the annular wall 30.1 formed higher on the top of the lower part. A central intermediate wall part 24.1 rests on the upper side of this higher annular wall 30.1 and has in its center the first opening 24.1 for the part of the lubricating oil flowing to the dirt trapping part 4.

In its remaining parts, the rotor 2 corresponds to FIG. 2 according to the execution FIG. 1 ,

FIG. 3 shows the rotor 2 FIG. 2 in a cross section along the line CC in FIG. 2 , Radial is outside in FIG. 3 the radially outer peripheral wall 40 of the waste collecting part 4 of the rotor 2 can be seen. The inner wall 43 of the dirt trap part 4 lies radially inwards. Through the hollow interior of the inner wall 43 runs the channel 30 '.

From the peripheral wall 40 extend with this integrally formed guide and partition walls 48 radially inwardly. In the left half of the FIG. 3 In this case, these guide and partition walls 48 are integrally formed both with the peripheral wall 40 and with the inner wall 43. In the right half of the FIG. 3 the guide and partition walls 48 are integral with only the peripheral wall 40 while terminating radially inward at a radial distance from the inner wall 43.

FIG. 4 Finally, a complete centrifuge 1 in longitudinal section, wherein the centrifuge 1 has a one-piece rotor 2 which is rotatable about the axis of rotation 20.

The centrifuge 1 comprises a housing 10, which is closed on the upper side with a screw cap 14. For this purpose, the housing 10 has an internal thread 11 and the cover 14 has an external thread 16, which are in releasable threaded engagement with each other. When removed from the housing 10 cover 14, the rotor 2 can be removed by stripping upward from the housing 10 and disposed of. A new rotor 2 can then be used in the reverse direction from above to complete the centrifuge 1 again.

The rotor 2 here also has a drive part 3 and a dirt trap part 4, which are not separable from each other, but form a unit. The rotor 2 consists of a thermoplastic material and is made of an upper part 22 and a lower part 23 along a circumferential weld 40 'welded together. The radially outer region of the interior of the waste collecting part 4 here again forms the dirt collecting area 4 ', which is limited to the outside by the wall 40, up through the wall 41 and down through the bottom 42 of the rotor 2. In the drive part 3, two branch channels 33 are formed, each leading to a 'Rückstoßdüse 34 for driving the rotor 2.

The housing 10 of the centrifuge 1 here comprises a housing part 10 'arranged under the rotor 2, to which a central axis 5 for the rotatable mounting of the rotor 2 is connected. Here, by means of a threaded end 50, the axle 5 is screwed to a central axle receptacle 12 of the housing part 10 '. Further, the axis 5 is hollow in a lower portion 53, whereby a flow path for lubricating oil is formed.

In addition, in this hollow portion 53, a minimum pressure valve 7 with a loaded in the closing direction by a spring valve body 70 which closes the oil inlet 18 of the centrifuge 1 in the absence or low oil pressure.

By means of a lower slide bearing 51 and an upper slide bearing 52, the rotor 2 is rotatably mounted on the axis 5 fixed to the housing.

If the lubricating oil pressure exceeds a predeterminable pressure, the minimum pressure valve 7 opens. When the minimum pressure valve 7 is open, lubricating oil to be cleaned flows through the inlet 18 in the axial direction upward past the valve body 70 of the minimum pressure valve 7. At the level of the lower sliding bearing 51 radial passages 54 lead from the hollow interior of section 53 of the axis 5 to the outside. In a seated on the lower part of the axis 5 bearing bush 21 of the sliding bearing 51 at the same height as the channels 54 further radial channels 54 '' are formed, which together form a radial flow path from the section 53 into the branch channels 33 to the recoil nozzles 34.

Near the upper end of the hollow portion 53 of the axle 5, another radial channel 54 'leads from the portion 53 into an annular channel 30' which extends between a radially inner wall 43 of the waste collecting part 4 and the outer periphery of the central axis 5. Through this channel 30 'and from this radially outwardly leading inlets 44, the lubricating oil to be cleaned enters the dirt trap part. 4

The lubricating oil passing through the inlet 44 into the upper region of the waste collecting part 4 flows through the interior of the waste collecting part 4 from top to bottom, due to a rotation of the rotor 2 dirt particles by centrifugal radially outward in the interior of the waste collecting part 4, namely in the dirt collecting 4 ' , drop. The cleaned lubricating oil leaves the dirt trap part 4 radially inwardly and downwardly through an oil outlet 47, from where the lubricating oil passes into a pressure-free region 13 in the interior of the housing 10. From there, the lubricating oil, for example, flow back into the oil pan of an associated internal combustion engine.

In order to slow down and even out the partial oil flow emerging from the oil outlet 47, interrupted deflecting ribs 17 extending in the circumferential direction are provided on the underside of the drive part 3 and on the upper side of the housing part 10 '.

The exiting from the nozzles 34 lubricating oil partial flow passes radially outward from the Umlenkrippen 17 also in the unpressurized region 13 and from there back to the oil pan of the associated internal combustion engine. To separate these two partial oil streams is a shield 17 ', which is mounted radially outwardly from the outlet 47 and parallel to and at a distance from the top of the housing part 10' thereto.

The partial oil flow exiting from the oil outlet 47 flows under the shielding disk 17 'and can thus not be stirred up by the oil jets emerging from the nozzles 34, thus avoiding unwanted braking of the rotor 2.

The distribution of the flowing through the inlet 18 lubricating oil flow in the two partial flows, which flow on the one hand to the return nozzles 34 and the other part to the dust collecting part 4, takes place in terms of quantity and pressure through the cross sections and the number of radial channels 54, 54 'and 54' 'in a desired way. Here, the radial channel 54 'form a throttle point for flowing through the dirt trap part 4 lubricating oil partial flow to relieve the waste trap part 4 of the lubricating oil pressure.

When servicing the centrifuge 1 according to FIG. 4 can be completely removed in the axial direction upward after unscrewing the cover 14 from the housing 10, the rotor 2, after a fuse 38 has been removed from the upper end of the shaft 5.

The rotor 2 is seated in its assembled state by means of a lower portion 30 "of its tubular body 30 sealed and sufficiently tight on the bearing bush 21 of the lower sliding bearing 51 and with an upper end portion The fit is selected in both bearings 51 and 52 so that the rotor 2 is sufficiently fixed in the attached state, but with the cover removed 14 and remote fuse 38 can still be easily removed manually upwards ,

Claims (13)

1. Impulse centrifuge (1) for cleaning lubricating oil of an internal combustion engine, with a housing (10) which is closed by a removable cover (14), with a rotor (2) rotatably arranged in the housing (10) and with channels (18, 13) for feeding the pressurized lubricating oil to be cleaned and for removing the cleaned pressureless lubricating oil, wherein the rotor (2) is carried out in plastic and in one piece or with parts firmly connected with each other, wherein the rotor (2) comprises at least one jet nozzle (34) and a dirt collection area (4'), and wherein the rotor (2) can be completely removed for disposal from the housing (10) when the cover (14) is opened, wherein the centrifuge (1) comprises means to separate the supplied lubricating oil flow into one first and one second partial flow, and wherein the rotor (2) comprises one drive part (3) - encompassing the jet nozzle(s) (34) and through which the first partial lubricating oil flow can flow - and one dirt trapping part (4) - encompassing the dirt collection area (4') and through which the second partial lubricating oil flow can flow -
   characterized in that
   the drive part (3) can only be flowed through by the first partial lubricating oil flow;
   the second partial lubricating oil flow can be guided from the dirt trapping part (4) directly into a pressureless area (13) on the inside of the housing (10); and
   the pressure level - in the drive part (3) on the one hand and in the dirt trapping part (4) on the other hand - is adjustable separately from each other.
2. Impulse centrifuge according to claim 1, characterized in that the rotor (2) comprises a one-piece top part (22), a one-piece bottom part (23) and at least one partitioning wall (24, 24') arranged between them which are connected with each other, preferably welded, and that the top part (22) and the partitioning wall (24, 24') enclose the dirt collection area (4'), and the bottom part (23) and the partitioning wall (24, 24') form the drive part (3).
3. Impulse centrifuge according to claim 2, characterized in that the top part (22) comprises a radially inner and a radially outer ring wall (43, 40) and an upper side cover wall (41), that the radially inner ring wall (43) forms, with its hollow interior, a channel (30') for the partial lubricating oil flow to be fed to the dirt trapping part (4), and that the radially inner wall (43) comprises, in its upper area, at least one transfer opening (44) from the channel (30') into the dirt collection area (4').
4. Impulse centrifuge according to claim 2 or 3, characterized in that the bottom part (23) comprises a central inlet (18) for the entire lubricating oil flow fed to the centrifuge, that from the inlet (18), a first opening (24.1) with a defined cross section leads through the partitioning wall (24, 24') into the channel (30'), and that from the inlet (18), at least one second opening (24.2) with a defined cross section leads into at least one nozzle chamber (34') formed between the partitioning wall (24, 24') and the bottom part (23).
5. Impulse centrifuge according to claim 4, characterized in that the bottom part (23) on the upper side comprises a low ring wall (30.1) extending congruently with the radially inner ring wall (43) of the top part (22) and that the second opening (24.2) extends radially through the ring wall (30.1) of the bottom part (23).
6. Impulse centrifuge according to claim 4 or 5, characterized in that the partitioning wall (24, 24') is carried out in one piece with at least one tubular nozzle type oil outlet channel (47) which leads from a radially inner part of the dirt collection area (4') through the/a nozzle chamber (34') to the underside of the rotor (2) and whose cross section is larger than the cross section of the first opening (24.1) and the transfer opening(s) (44).
7. Impulse centrifuge according to any one of the claims 2 to 6, characterized in that the partitioning wall (24) is carried out in one piece and extends in a plane between top part (22) and bottom part (23).
8. Impulse centrifuge according to any one of the claims 2 to 6, characterized in that the partitioning wall (24, 24') is carried out in two parts and that a radially outer part (24) of the partitioning wall (24, 24') extends in a first plane and a radially inner part (24') of the partitioning wall (24, 24') extends in a second plane between top part (22) and bottom part (23).
9. Impulse centrifuge according to any one of the claims 2 to 8, characterized in that, in the dirt trapping part (4), guiding and partitioning walls (48) extending in radial direction are provided which are uniformly spaced from each other in circumferential direction of the rotor (2) and which are of one piece with the top part (22).
10. Impulse centrifuge according to any one of the claims 1 to 9, characterized in that, on the bottom and the top of the rotor (2), one centric shaft stub (5', 5") each is attached or formed on in one piece for the rotatable bearing of the rotor (2).
11. Impulse centrifuge according to any one of the claims 1 to 9, characterized in that the rotor (2) comprises, in its center, an axially continuous hollow space (30') which is open top and bottom or only on the bottom, that a fixed housing axis (5) extends through the hollow space (30') for the rotatable bearing of the rotor (2) and that bearings (51, 52) are arranged between the axis (5) and the rotor (2) which remain on the axis (5) upon removal of the rotor (2) from the housing (10).
12. Impulse centrifuge according to claim 11, characterized in that a section of an oil feed channel forming an oil inlet (18) extends through the fixed housing axis (5), that from the oil inlet (18), the first partial lubricating oil flow can be guided into the dirt collection area (4') through at least one first transfer opening (54') with a defined cross section provided in the axis (5), and that from the oil inlet (18), the second partial lubricating oil flow can be guided into the drive part (3) through at least one second transfer opening (54) with a defined cross section provided in the axis.
13. Impulse centrifuge according to claim 12, characterized in that a bottom bearing (51) of the rotor (2) is formed by a friction bearing with a bearing bush (51') set upon the axis (5), that downstream of the second transfer opening (54) of the axis (5), in the bearing bush (51'), at least one other transfer opening (54") is provided leading into the drive part (3), and that the rotor (2) with a central lower, sleeve-like formed area (30") sealed in a sliding fit is set onto the bearing bush (51').

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