EP2832448B1 - Oil centrifuge with centrifuge rotor - Google Patents
Oil centrifuge with centrifuge rotor Download PDFInfo
- Publication number
- EP2832448B1 EP2832448B1 EP14178737.4A EP14178737A EP2832448B1 EP 2832448 B1 EP2832448 B1 EP 2832448B1 EP 14178737 A EP14178737 A EP 14178737A EP 2832448 B1 EP2832448 B1 EP 2832448B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- centrifuge rotor
- oil
- centrifuge
- throttle point
- valve
- 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.)
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Links
- 238000011144 upstream manufacturing Methods 0.000 claims description 19
- 239000003921 oil Substances 0.000 description 85
- 239000012530 fluid Substances 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 229910000906 Bronze Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010974 bronze Substances 0.000 description 3
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/04—Periodical feeding or discharging; Control arrangements therefor
-
- 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
- B04B9/06—Fluid drive
-
- 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
- B04B9/10—Control of the drive; Speed regulating
Definitions
- the invention relates to an oil centrifuge with an integrated, rotatably mounted centrifuge rotor according to the preamble of claim 1.
- the oil centrifuge can be used as an industrial oil centrifuge or in a motor vehicle.
- the oil centrifuge can be part of an oil module which, in addition to the oil centrifuge, can have an oil filter with a filter element and a heat exchanger.
- Such oil modules are used in particular in commercial vehicles.
- the oil filter has a main flow filter and a secondary flow filter, through which the oil to be cleaned flows in succession.
- the main flow filter comprises a ring filter insert in a housing pot, the secondary flow filter the centrifuge rotor, into which the oil is led from the clean side of the main flow filter via a fixed, rigid pipe to the centrifuge rotor.
- a safety valve In the transition from the tube to the centrifuge rotor there is a safety valve which is moved into the blocking position if the centrifuge rotor is not arranged in its correct position.
- the EP 1 217 183 A1 discloses a free jet centrifuge for cleaning the lubricating oil of an internal combustion engine and simultaneously cleaning the crankcase gases.
- the rotor housing has an oil inlet, an oil outlet, a supply line for crankcase gases and a suction line for cleaned crankcase gases, the oil outlet and supply line being at least partially formed by a single connecting channel.
- the supplied crankcase gas is led through a volume in which the oil mist generated by the drive nozzles of the rotor is located.
- a centrifuge with a center tube and shaft is known, the shaft having a feed line with one or more fluid connections.
- the center tube is provided with openings in two sections. Part of the fluid in the centrifuge bypasses cleaning and drives the centrifuge, while the remaining fluid flows through the centrifuge and is cleaned. The fluid is then diverted through nozzles to drive the centrifuge.
- the DE 10 2006 021 033 A1 describes a centrifuge rotor detection device for oil supply interruption.
- a housing part of the centrifuge has a fluid inlet channel in which a bearing and a check valve are received.
- the rotor has a pin which opens the check valve when the pin is received in the bearing.
- US 5,904,841 A discloses an oil centrifuge with an integrated, rotatably mounted centrifuge rotor, with an inflow tube to the centrifuge rotor, which defines at least a portion of the flow path of the oil to the centrifuge rotor.
- the flow path here has a throttling point with a reduced cross section in the form of a Venturi nozzle, but this is not in the flow path to the centrifuge rotor, but in a branch line which leads away from the centrifuge rotor.
- the invention is based on the object of designing an oil centrifuge with a centrifuge rotor for simple operation with a long service life.
- the oil centrifuge according to the invention is used, for example, for oil cleaning in internal combustion engines and has a rotatably mounted centrifuge rotor, with the aid of which dirt particles in the oil can be separated off.
- the oil centrifuge is preferably integrated in an oil circuit, which advantageously has an oil filter with a filter element, which is designed as a ring filter, for example, as a main flow filter for coarse separation, and, downstream of the main flow filter, the oil centrifuge with the centrifuge rotor, which forms the bypass filter for fine separation.
- a partial amount of the oil filtered by the oil filter for example 10-20%, is fed to the oil centrifuge.
- the oil centrifuge is arranged in a bypass to the main flow of the oil coming from the oil filter.
- the oil enters the centrifuge rotor via an inflow tube which forms at least a section of the flow path for the oil in the oil centrifuge.
- the flow path inside the oil centrifuge and in front of the centrifuge rotor has a throttle point with a reduced cross section, the cross section upstream of the throttle point being expanded.
- the cross section is also expanded downstream of the throttle.
- the inflow tube has the throttle point.
- the throttle point is a constriction, which causes a pressure loss in the oil flow.
- the throttling point dampens pressure peaks and thereby ensures an equalization of the oil pressure in the centrifuge rotor, which is thus relieved of the pressure peaks, which leads to a reduction in the load on the centrifuge rotor and to an increase in the rotor service life.
- By slowly expanding the cross-section downstream of the throttle point the remaining pressure loss can be kept relatively low, so that on the one hand there is a sufficiently high pressure in the centrifuge rotor to contribute to a high rotational speed and thus support the particle separation, and on the other hand in the throttle point the pressure fluctuations are reduced, so that the peak load is also further reduced accordingly.
- the throttle point is preferably designed in such a way that the flow cross section of the flow path gradually tapers and no sudden cross-sectional jumps occur.
- the throttle point is designed according to the invention as a Laval nozzle.
- the flow cross section gradually narrows to a narrow point and gradually widens behind the narrow point, the flow cross section always being circular.
- the flow path upstream and downstream of the throttle point has the same cross section, so that there is only a reduction in cross section in the area of the throttle point, and the full inflow pipe cross section is otherwise retained.
- the area of the throttling point it can be expedient that it has a diameter of at most 90%, in particular at most 70%, preferably at most 50% of the largest diameter of the inflow pipe. This reduction in diameter in the area of the throttle point ensures adequate damping of the pressure peaks.
- the cross section downstream of the throttle point is smaller than upstream, that is to say at the beginning of the throttle point.
- the throttle point is advantageously located in the inflow region of the oil centrifuge or the inflow pipe, with designs possibly also being considered in which the throttle point is arranged at a distance from the end faces or on the outflow-side region of the inflow pipe. In any case, however, the throttle point is located upstream of the outflow openings in the inflow tube to the centrifuge rotor.
- the inflow tube can be non-rotatably connected to the centrifuge rotor, for example in the case of a one-piece design of the inflow tube and centrifuge rotor.
- the inflow tube rotates with the centrifuge rotor, it being possible for the inflow tube to also be designed separately, but can be connected to the centrifuge rotor.
- the inflow tube is arranged fixed to the housing and therefore does not rotate with the centrifuge rotor. Both in the case of an arrangement fixed to the housing and in the case of a rotating arrangement of the inflow tube on the centrifuge rotor side, it lies in the longitudinal axis of the centrifuge rotor.
- valve in the inflow tube or upstream of the inflow tube.
- the valve is advantageously arranged upstream of the throttle point.
- the throttle point can also be arranged at another point relative to the valve, for example in the valve housing, preferably in the inlet area of the valve.
- the valve has a safety function to prevent an undesired transfer of oil into the area of the centrifuge rotor.
- the valve is designed as a safety valve, which is only in the open position when the centrifuge rotor is correctly installed in order to allow the oil to flow through the inflow tube.
- a valve body of the safety valve is held in the open position by the centrifuge rotor. If, on the other hand, the centrifuge rotor is missing or is incorrectly installed, the valve body is transferred from the oil pressure from the open position to a closed position in which the oil flow is interrupted.
- a valve device which comprises a pressure valve and a safety valve connected downstream of the pressure valve, the pressure valve only moving into the open position when a limit pressure of, for example, 2 bar is exceeded becomes.
- the downstream safety valve is held in the open position by the centrifuge rotor as described above.
- the pressure valve and the safety valve can form a structural unit, wherein the two valves can be formed separately, but are connected to one another.
- the valve body of the safety valve is acted upon, for example, by an adjusting pin in the open position, which is formed in one piece with the centrifuge rotor.
- the safety valve is designed, for example, as a ball valve; accordingly, the valve member is formed by a ball.
- the throttle point can be arranged upstream of the valve device in an inlet section for the oil, if present, or downstream of the valve device in the inflow pipe.
- Fig. 1 and Fig. 2 are exemplified oil centrifuges 1 with centrifuge rotor 3 for an internal combustion engine, in which the in Fig. 3 throttle point described in more detail can be used.
- the throttling point can be introduced into the flow path to the centrifuge rotor 3 regardless of the number and design of valve devices which are likewise located in the flow path.
- Fig. 1 an oil centrifuge 1 for an internal combustion engine is shown.
- the oil centrifuge 1 is preferably introduced into an oil circuit with an oil filter.
- the oil centrifuge 1 can be part of an oil module 2 which has the oil filter and the oil centrifuge 1 and can be designed, for example, as a die-cast part, in particular made of aluminum.
- the oil centrifuge 1 with the centrifuge rotor 3 lies downstream of the oil filter in a bypass channel to a main flow channel for the oil pre-cleaned by the oil filter and is overlapped by a pot-like or lid-like housing component 4 which is connected to the oil module 2 or a housing base, for example screwed on ,
- the centrifuge rotor 3 is rotatably supported relative to the oil module 2 or the housing base and the housing component 4 and can rotate about its longitudinal axis 5.
- a pressure valve 6 and a safety valve 7 connected downstream of the pressure valve 6, which are designed as a coherent valve device.
- the pressure valve 6 and the safety valve 7 are designed as separate components, which, however, are connected and connected to one another.
- the two valves 6, 7 can also be formed in one piece with a common housing.
- the pressure valve 6 is designed as a piston valve, the spring-loaded piston 8, which forms the valve member of the pressure valve 6, is urged into the closed position and is pressed by the oil on the clean side of the oil module 2 in the direction of the open position.
- the piston 8 of the pressure valve 6 opens as soon as the pressure reaches a pressure threshold, for example 2 bar. The flow path through the upstream pressure valve 6 is then released.
- the downstream safety valve 7 is placed directly on the housing of the pressure valve 6 and connected to it, for example screwed.
- the safety valve 7 is designed as a ball valve, accordingly the valve body of the safety valve 7 is formed by a ball 9 which is adjustably received by the housing of the safety valve 7.
- An adjusting pin 10 protrudes into the safety valve 7, which is formed in one piece with an inflow tube 11, which is an integral part of the centrifuge rotor 3 and extends centrally on the inside of the centrifuge rotor 3.
- the adjusting pin 10 of the centrifuge rotor 3 protrudes into the outflow path of the safety valve 7 and keeps the ball 9 of the safety valve at a distance from its sealing seat, so that the flow path in the safety valve 7 is kept clear. If, on the other hand, the adjusting pin 10 is missing, for example when the centrifuge rotor 3 is not or incorrectly installed, the ball 9 is adjusted into its sealing position by the pressure of the oil brought in and thus closes the flow path.
- the housing of the pressure valve 6 is screwed into the oil module 2.
- the flow path through the valves 6 and 7 is coaxial to the longitudinal axis 5 of the oil centrifuge 1 and centrifuge rotor 3.
- the safety valve 7 projects axially into the inflow tube 11, which is formed in one piece with the centrifuge rotor 3 and rotates together with the latter; the inflow pipe 11 is part of the flow path of the oil to the centrifuge rotor 3.
- the flow path has a throttle point with a reduced flow cross section, the throttle point not being shown here for reasons of clarity.
- the throttle point can be arranged at any point in the flow path to the centrifuge rotor 3, but in front of outlet openings in the inflow tube 11 for introducing the oil into the centrifuge rotor 3.
- the throttle point can be arranged, for example, in the housing of the pressure valve 6 or the safety valve 7. However, the throttle point can also be introduced downstream of the valves 6 and 7 into the inflow pipe 11 or upstream of the valves 6 and 7 into the inlet section of the oil centrifuge 1. At least upstream of the throttle point, the diameter or flow cross section of the flow path is widened with respect to the throttle point.
- An advantageous form of the throttle point is in Fig. 3 shown.
- the centrifuge rotor 3 is rotatably supported via two axially spaced bearing points.
- a first bearing point is located on the outside of the housing of the pressure valve 6 and is either, as in the left half of the figure Fig. 1 shown as a pair of plain bearings executed with two plain bearing bushes, of which the inner plain bearing bush is located on the wall of the housing of the pressure valve 6 and the outer plain bearing bush on the inside of the inflow tube 11 of the centrifuge rotor 3.
- the plain bearing bushes can consist of different materials, for example a material pair of steel sintered bronze.
- the storage location exists, as in the right half of the picture Fig.
- This second bearing point is designed as a slide bearing 14 and has a slide bearing bush 15 that extends into the end face of the inflow tube 11 is inserted on the centrifuge rotor 3, and a bearing pin 16 which is held on the inside of the housing component 4 via a rubber damper 17 and projects into the slide bearing bush 15.
- the bearing pin 16 is designed, for example, as a steel pin, the plain bearing bush 15 can consist of sintered bronze.
- the flow path through the oil centrifuge 1 is shown with arrows.
- the filtration takes place in the oil filter, from the clean side of which the oil is guided axially through the valve device with the pressure valve 6 and the safety valve 7 into the inflow tube of the centrifuge rotor 3.
- both valves 6, 7 are open, the oil passes radially into the rotor chambers of the centrifuge rotor via outlet openings in the wall of the inflow tube 11, as shown by the arrows, where particles are separated.
- the oil then flows axially downwards and can be discharged through outflow openings. Due to the oil pressure and with a corresponding design of the outflow openings, the centrifuge rotor rotates about its longitudinal axis 5.
- the oil centrifuge 1 basically has the same structure as in Fig. 1 on.
- the storage of the centrifuge rotor is different 3, which is designed as a flying storage.
- a first bearing point between the pressure valve 6 and the end face of the inflow tube 11 of the centrifuge rotor 3 is analogous to Fig. 1 formed and can either be designed as a plain bearing 12 with two plain bearing bushes or as a ball bearing 13.
- a second bearing point is located at a relatively small axial distance on the safety valve 7 and, like the first bearing point, is designed either as a sliding bearing 18 with two sliding bearing bushes, which can optionally consist of different materials, such as steel and sintered bronze, or as a ball bearing 19.
- the bearing is carried out on the housing of the safety valve 7 and on the inner wall of the inflow tube 11, which is formed in one piece with the centrifuge rotor 3.
- FIG. 3 An embodiment of a throttle point 23 is shown in the inflow tube 11 of the centrifuge rotor 3.
- the inflow of the oil to the centrifuge rotor 3 takes place via the inflow tube 11, which has a tube section 21 which is formed in one piece with a bottom-side rotor component 31.
- the inflow pipe 11 defines the flow path for the oil.
- the rotor component 31 is located at the bottom of the centrifuge rotor 3 and is formed separately from an upper rotor part 32.
- the bottom-side rotor component 31 is designed such that it cannot rotate with the upper rotor part 32 and rotates together with the latter about the longitudinal axis 5.
- upper rotor part 32 and bottom-side rotor component 31 are welded together.
- the centrifuge rotor 3 can also be formed in one piece.
- the tube section 21, which is formed in one piece with the bottom-side rotor component 31, forms the first part of the inflow tube 11 for supplying the oil into the centrifuge rotor 3.
- the tube section 21 Adjacent to the inflow region 22, which faces away from the centrifuge rotor 3, the tube section 21 is provided with a throttle point 23 which has a cross section which is reduced in comparison to the other cross sections.
- the diameter of the throttle point 23 is identified by d D
- the diameter of the pipe section 21 upstream and downstream of the throttle point 23 is d K
- the throttle point diameter d D not exceeding 40% to 90% of the maximum diameter d K of the pipe section 21.
- the throttle point diameter is between approximately 50% and approximately 60% of the maximum diameter d K.
- the diameter d K of the pipe section 21 is the same size upstream and downstream of the throttle point 23.
- the throttle point 23 is designed for example in the manner of a Laval nozzle and dampens pressure peaks, as a result of which the load on the centrifuge rotor 3 is reduced.
- the throttle point 23 is located axially approximately centrally in the tube section 21, which is flanged on the end face to the portion of the inflow tube 11 which is formed in one piece with the rotor upper part 32.
- the diameter of the inflow pipe 11 in front of and behind the throttle point 23 is different, the diameter being expanded at least upstream of the throttle point 23 compared to the throttle point diameter.
- the centrifuge rotor 3 is rotatably supported in two bearings 24 and 25.
- the first bearing point 24 is located on the tube section 21 of the bottom-side rotor component 31.
- the second bearing point 25 is on the axially opposite side in the upper region of the centrifuge rotor 3;
- the centrifuge rotor 3 is rotatably mounted on the housing component 4 via the second bearing point 25.
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- Centrifugal Separators (AREA)
Description
Die Erfindung bezieht sich auf eine Ölzentrifuge mit einem integrierten, drehbar gelagerten Zentrifugenrotor nach dem Oberbegriff des Anspruches 1. Die Ölzentrifuge kann als industrielle Ölzentrifuge zur Anwendung kommen oder auch in einem Kraftfahrzeug. Die Ölzentrifuge kann Teil eines Ölmoduls sein, welches außer der Ölzentrifuge einen Ölfilter mit einem Filterelement und einen Wärmetauscher aufweisen kann. Derartige Ölmodule kommen insbesondere in Nutzfahrzeugen zum Einsatz.The invention relates to an oil centrifuge with an integrated, rotatably mounted centrifuge rotor according to the preamble of
Aus der
Die
Aus der
Die
Der Erfindung liegt die Aufgabe zu Grunde, mit einfachen konstruktiven Maßnahmen eine Ölzentrifuge mit Zentrifugenrotor für eine lange Betriebsdauer auszulegen.The invention is based on the object of designing an oil centrifuge with a centrifuge rotor for simple operation with a long service life.
Diese Aufgabe wird erfindungsgemäß mit den Merkmalen des Anspruches 1 bzw. 13 gelöst. Die Unteransprüche geben zweckmäßige Weiterbildungen an.This object is achieved with the features of
Die erfindungsgemäße Ölzentrifuge wird beispielsweise zur Ölreinigung in Verbrennungsmaschinen eingesetzt und weist einen drehbar gelagerten Zentrifugenrotor auf, mit dessen Hilfe Schmutzpartikel im Öl abgeschieden werden können. Die Ölzentrifuge ist vorzugsweise in einen Ölkreislauf integriert, welcher vorteilhafterweise als Hauptstromfilter zur Grobabscheidung einen Ölfilter mit einem Filterelement aufweist, welches beispielsweise als Ringfilter ausgebildet ist, sowie stromab des Hauptstromfilters die Ölzentrifuge mit dem Zentrifugenrotor, welche den Nebenstromfilter zur Feinabscheidung bildet. Hierbei wird vorzugsweise nur eine Teilmenge des vom Ölfilter gefilterten Öls, beispielsweise 10 - 20 %, der Ölzentrifuge zugeführt. Mit anderen Worten ist die Ölzentrifuge in einem Bypass zum Hauptstrom des vom Ölfilter kommenden Öls angeordnet. Der Eintritt des Öls in den Zentrifugenrotor erfolgt über ein Zuströmrohr, welches zumindest einen Abschnitt des Strömungswegs für das Öl in der Ölzentrifuge bildet. Der Strömungsweg innerhalb der Ölzentrifuge und vor dem Zentrifugenrotor weist eine Drosselstelle mit reduziertem Querschnitt auf, wobei der Querschnitt stromauf der Drosselstelle erweitert ist. In einer vorteilhaften Ausgestaltung ist der Querschnitt auch stromab der Drosselstelle erweitert. Insbesondere für den Fall, dass der gesamte Strömungsweg durch das Zuströmrohr gebildet ist, weist das Zuströmrohr die Drosselstelle auf. Die hier im Zusammenhang mit der erfindungsgemäßen Ölzentrifuge dargestellten Ausführungen gelten entsprechend für den erfindungsgemäßen Zentrifugenrotor.The oil centrifuge according to the invention is used, for example, for oil cleaning in internal combustion engines and has a rotatably mounted centrifuge rotor, with the aid of which dirt particles in the oil can be separated off. The oil centrifuge is preferably integrated in an oil circuit, which advantageously has an oil filter with a filter element, which is designed as a ring filter, for example, as a main flow filter for coarse separation, and, downstream of the main flow filter, the oil centrifuge with the centrifuge rotor, which forms the bypass filter for fine separation. In this case, preferably only a partial amount of the oil filtered by the oil filter, for example 10-20%, is fed to the oil centrifuge. In other words, the oil centrifuge is arranged in a bypass to the main flow of the oil coming from the oil filter. The oil enters the centrifuge rotor via an inflow tube which forms at least a section of the flow path for the oil in the oil centrifuge. The flow path inside the oil centrifuge and in front of the centrifuge rotor has a throttle point with a reduced cross section, the cross section upstream of the throttle point being expanded. In an advantageous embodiment, the cross section is also expanded downstream of the throttle. In particular in the event that the entire flow path is formed by the inflow tube, the inflow tube has the throttle point. The statements presented here in connection with the oil centrifuge according to the invention apply accordingly to the centrifuge rotor according to the invention.
Die Drosselstelle stellt eine Engstelle dar, welche einen Druckverlust in der Ölströmung bewirkt. Die Drosselstelle dämpft Druckspitzen und sorgt hierdurch für eine Vergleichmäßigung des Öldrucks im Zentrifugenrotor, der somit von den Druckspitzen entlastet wird, was zu einer Reduzierung der Belastung des Zentrifugenrotors und zu einer Erhöhung der Rotorlebensdauer führt. Indem der Querschnitt stromab der Drosselstelle langsam wieder erweitert wird, kann der verbleibende Druckverlust relativ gering gehalten werden, sodass einerseits im Zentrifugenrotor ein ausreichend hoher Druck zur Verfügung steht, um zu einer hohen Rotationsgeschwindigkeit beizutragen und somit die Partikelabscheidung zu unterstützen, und andererseits in der Drosselstelle die Druckschwankungen reduziert werden, so dass die Spitzenbelastung ebenfalls entsprechend weiter reduziert ist. Die Drosselstelle ist vorzugsweise derart ausgestaltet, dass sich der Strömungsquerschnitt des Strömungsweges allmählich verjüngt und keine plötzlichen Querschnittssprünge auftreten.The throttle point is a constriction, which causes a pressure loss in the oil flow. The throttling point dampens pressure peaks and thereby ensures an equalization of the oil pressure in the centrifuge rotor, which is thus relieved of the pressure peaks, which leads to a reduction in the load on the centrifuge rotor and to an increase in the rotor service life. By slowly expanding the cross-section downstream of the throttle point, the remaining pressure loss can be kept relatively low, so that on the one hand there is a sufficiently high pressure in the centrifuge rotor to contribute to a high rotational speed and thus support the particle separation, and on the other hand in the throttle point the pressure fluctuations are reduced, so that the peak load is also further reduced accordingly. The throttle point is preferably designed in such a way that the flow cross section of the flow path gradually tapers and no sudden cross-sectional jumps occur.
Die Drosselstelle ist erfindungsgemäß als Lavaldüse ausgebildet. Hierbei verjüngt sich der Strömungsquerschnitt allmählich zu einer Engstelle und weitet sich hinter der Engstelle allmählich wieder auf, wobei der Strömungsquerschnitt stets kreisförmig ist. Vorteilhafterweise weist der Strömungsweg stromauf und stromab der Drosselstelle den gleichen Querschnitt auf, so dass nur im Bereich der Drosselstelle eine Querschnittsreduzierung besteht und im Übrigen der volle Zuströmrohrquerschnitt erhalten bleibt. Im Bereich der Drosselstelle kann es zweckmäßig sein, dass diese einen Durchmesser von maximal 90 %, insbesondere maximal 70 %, vorzugsweise maximal 50 % des größten Durchmessers des Zuströmrohrs aufweist. Diese Durchmesserreduzierung im Bereich der Drosselstelle sorgt für eine ausreichende Dämpfung der Druckspitzen.The throttle point is designed according to the invention as a Laval nozzle. Here, the flow cross section gradually narrows to a narrow point and gradually widens behind the narrow point, the flow cross section always being circular. Advantageously, the flow path upstream and downstream of the throttle point has the same cross section, so that there is only a reduction in cross section in the area of the throttle point, and the full inflow pipe cross section is otherwise retained. In the area of the throttling point, it can be expedient that it has a diameter of at most 90%, in particular at most 70%, preferably at most 50% of the largest diameter of the inflow pipe. This reduction in diameter in the area of the throttle point ensures adequate damping of the pressure peaks.
Gemäß einer alternativen Ausführung ist es aber auch möglich, dass stromauf und stromab der Drosselstelle unterschiedliche Querschnitte herrschen. Beispielsweise ist der Querschnitt stromab der Drosselstelle geringer als stromauf, also eingangs der Drosselstelle.According to an alternative embodiment, however, it is also possible for there to be different cross sections upstream and downstream of the throttle point. For example, the cross section downstream of the throttle point is smaller than upstream, that is to say at the beginning of the throttle point.
Die Drosselstelle befindet sich vorteilhafterweise im Einströmbereich der Ölzentrifuge oder des Zuströmrohrs, wobei ggf. auch Ausführungen in Betracht kommen, bei denen die Drosselstelle mit Abstand zu den Stirnseiten oder am abströmseitigen Bereich des Zuströmrohrs angeordnet ist. In jedem Fall jedoch befindet sich die Drosselstelle stromauf vor Abströmöffnungen im Zuströmrohr zum Zentrifugenrotor.The throttle point is advantageously located in the inflow region of the oil centrifuge or the inflow pipe, with designs possibly also being considered in which the throttle point is arranged at a distance from the end faces or on the outflow-side region of the inflow pipe. In any case, however, the throttle point is located upstream of the outflow openings in the inflow tube to the centrifuge rotor.
Das Zuströmrohr kann drehfest mit dem Zentrifugenrotor verbunden sein, beispielsweise bei einteiliger Ausführung von Zuströmrohr und Zentrifugenrotor. In diesem Fall dreht sich das Zuströmrohr mit dem Zentrifugenrotor, wobei ggf. das Zuströmrohr auch separat ausgeführt, jedoch mit dem Zentrifugenrotor verbunden sein kann. In einer alternativen Ausführung mit separater Ausbildung des Zuströmrohrs vom Zentrifugenrotor ist das Zuströmrohr gehäusefest angeordnet und dreht sich somit nicht mit dem Zentrifugenrotor. Sowohl bei gehäusefester Anordnung als auch bei drehender, zentrifugenrotorseitiger Anordnung des Zuströmrohrs liegt dieses in der Längsachse des Zentrifugenrotors.The inflow tube can be non-rotatably connected to the centrifuge rotor, for example in the case of a one-piece design of the inflow tube and centrifuge rotor. In this case, the inflow tube rotates with the centrifuge rotor, it being possible for the inflow tube to also be designed separately, but can be connected to the centrifuge rotor. In an alternative embodiment with separate design of the inflow tube from the centrifuge rotor, the inflow tube is arranged fixed to the housing and therefore does not rotate with the centrifuge rotor. Both in the case of an arrangement fixed to the housing and in the case of a rotating arrangement of the inflow tube on the centrifuge rotor side, it lies in the longitudinal axis of the centrifuge rotor.
Es kann zweckmäßig sein, im Zuströmrohr oder stromauf des Zuströmrohrs ein Ventil vorzusehen. Vorteilhafterweise ist das Ventil stromauf der Drosselstelle angeordnet. Die Drosselstelle kann jedoch auch an einer anderen Stelle relativ zu dem Ventil angeordnet sein, beispielsweise im Ventilgehäuse, vorzugsweise im Eintrittsbereich des Ventils. Dem Ventil kommt eine Sicherheitsfunktion zu, um einen unerwünschten Übertritt von Öl in den Bereich des Zentrifugenrotors zu verhindern. Beispielsweise ist das Ventil als ein Sicherheitsventil ausgebildet, das nur bei korrekt montiertem Zentrifugenrotor in Öffnungsstellung steht, um den Ölfluss durch das Zuströmrohr zu erlauben. Hierbei wird ein Ventilkörper des Sicherheitsventils von dem Zentrifugenrotor in der Öffnungsstellung gehalten. Fehlt dagegen der Zentrifugenrotor bzw. ist dieser falsch montiert, so wird der Ventilkörper von dem Öldruck aus der Öffnungsstellung in eine Schließstellung überführt, in der die Ölströmung unterbrochen ist.It can be expedient to provide a valve in the inflow tube or upstream of the inflow tube. The valve is advantageously arranged upstream of the throttle point. However, the throttle point can also be arranged at another point relative to the valve, for example in the valve housing, preferably in the inlet area of the valve. The valve has a safety function to prevent an undesired transfer of oil into the area of the centrifuge rotor. For example, the valve is designed as a safety valve, which is only in the open position when the centrifuge rotor is correctly installed in order to allow the oil to flow through the inflow tube. Here, a valve body of the safety valve is held in the open position by the centrifuge rotor. If, on the other hand, the centrifuge rotor is missing or is incorrectly installed, the valve body is transferred from the oil pressure from the open position to a closed position in which the oil flow is interrupted.
Gemäß einer weiteren zweckmäßigen Ausführung befindet sich im Zuströmweg zum Zentrifugenrotor eine Ventileinrichtung, welche ein Druckventil und ein dem Druckventil nachgeschaltetes Sicherheitsventil umfasst, wobei das Druckventil erst mit dem Überschreiten eines Grenzdrucks von beispielsweise 2 bar in die Öffnungsstellung überführt wird. Das nachgeschaltete Sicherheitsventil wird wie vorbeschrieben von dem Zentrifugenrotor in der Öffnungsstellung gehalten. Das Druckventil und das Sicherheitsventil können eine bauliche Einheit bilden, wobei die beiden Ventile zwar separat ausgebildet sein können, jedoch miteinander verbunden sind. Der Ventilkörper des Sicherheitsventils wird beispielsweise von einem Stellzapfen in die Öffnungsstellung beaufschlagt, welcher einteilig mit dem Zentrifugenrotor ausgebildet ist. Das Sicherheitsventil ist beispielsweise als ein Kugelventil ausgebildet; dementsprechend wird das Ventilglied von einer Kugel gebildet. Bei dieser Ausführungsform kann die Drosselstelle stromauf der Ventileinrichtung in einem gegebenenfalls vorhandenen Einlassabschnitt für das Öl, oder stromab der Ventilvorrichtung in dem Zuströmrohr angeordnet sein. Es ist jedoch ebenfalls möglich, die Drosselstelle zwischen den beiden Ventilen, im Gehäuse des Druckventils oder im Gehäuse des Sicherheitsventils auszubilden.According to a further expedient embodiment, in the inflow path to the centrifuge rotor there is a valve device which comprises a pressure valve and a safety valve connected downstream of the pressure valve, the pressure valve only moving into the open position when a limit pressure of, for example, 2 bar is exceeded becomes. The downstream safety valve is held in the open position by the centrifuge rotor as described above. The pressure valve and the safety valve can form a structural unit, wherein the two valves can be formed separately, but are connected to one another. The valve body of the safety valve is acted upon, for example, by an adjusting pin in the open position, which is formed in one piece with the centrifuge rotor. The safety valve is designed, for example, as a ball valve; accordingly, the valve member is formed by a ball. In this embodiment, the throttle point can be arranged upstream of the valve device in an inlet section for the oil, if present, or downstream of the valve device in the inflow pipe. However, it is also possible to form the throttle point between the two valves, in the housing of the pressure valve or in the housing of the safety valve.
Weitere Vorteile und zweckmäßige Ausführunge sind den weiteren Ansprüchen, der Figurenbeschreibung und den Zeichnungen zu entnehmen. Es zeigen:
- Fig. 1
- einen Schnitt durch eine Ölzentrifuge mit integriertem Zentrifugenrotor, mit zwei hintereinander angeordneten Ventilen und einer ersten Lagerstelle im Bereich eines Ventiles sowie einer zweiten Lagerstelle an der Stirnseite des Zentrifugenrotors,
- Fig. 2
- eine
Fig. 1 entsprechende Ausführung, jedoch mit einer zweiten Lagerstelle im Bereich des zweiten Ventils, - Fig. 3
- einen Schnitt durch eine Ölzentrifuge mit integriertem Zentrifugenrotor in einer weiteren Ausführung ohne Ventile mit Darstellung der Drosselstelle.
- Fig. 1
- 2 shows a section through an oil centrifuge with an integrated centrifuge rotor, with two valves arranged one behind the other and a first bearing point in the area of a valve and a second bearing point on the end face of the centrifuge rotor,
- Fig. 2
- a
Fig. 1 corresponding design, but with a second bearing in the area of the second valve, - Fig. 3
- a section through an oil centrifuge with an integrated centrifuge rotor in a further version without valves, showing the throttle point.
In den Figuren sind gleiche Bauteile mit gleichen Bezugszeichen versehen.In the figures, the same components are provided with the same reference symbols.
In
In
Im Zuströmweg des Öls vom Ölmodul 2 zum Zentrifugenrotor 3 befinden sich ein Druckventil 6 und ein dem Druckventil 6 nachgeschaltetes Sicherheitsventil 7, die als eine zusammenhängende Ventileinrichtung ausgeführt sind. Das Druckventil 6 und das Sicherheitsventil 7 sind als separate Bauteile ausgebildet, die jedoch zusammenhängen und miteinander verbunden sind. Alternativ können die beiden Ventile 6, 7 auch einstückig mit einem gemeinsamen Gehäuse ausgebildet sein. Das Druckventil 6 ist als ein Kolbenventil ausgebildet, dessen federbelasteter Kolben 8, welcher das Ventilglied des Druckventils 6 bildet, in die Schließstellung beaufschlagt ist und von dem Öl auf der Reinseite des Ölmoduls 2 in Richtung Öffnungsstellung gedrückt wird. Der Kolben 8 des Druckventils 6 öffnet, sobald der Druck einen Druckschwellenwert erreicht, beispielsweise 2 bar. Daraufhin ist der Strömungsweg durch das vorgeschaltete Druckventil 6 freigegeben.In the inflow path of the oil from the
Das nachgeschaltete Sicherheitsventil 7 ist unmittelbar auf das Gehäuse des Druckventils 6 aufgesetzt und mit diesem verbunden, beispielsweise verschraubt. Das Sicherheitsventil 7 ist als Kugelventil ausgeführt, dementsprechend ist der Ventilkörper des Sicherheitsventils 7 von einer Kugel 9 gebildet, die von dem Gehäuse des Sicherheitsventils 7 verstellbar aufgenommen ist.The
In das Sicherheitsventil 7 ragt ein Stellzapfen 10 ein, der einteilig mit einem Zuströmrohr 11 ausgebildet ist, welches einteiliger Bestandteil des Zentrifugenrotors 3 ist und sich zentrisch an der Innenseite des Zentrifugenrotors 3 erstreckt. Der Stellzapfen 10 des Zentrifugenrotors 3 ragt in den Abströmweg des Sicherheitsventils 7 ein und hält die Kugel 9 des Sicherheitsventils auf Abstand von ihrem Dichtsitz, so dass der Strömungsweg im Sicherheitsventil 7 freigehalten ist. Fehlt dagegen der Stellzapfen 10, beispielsweise bei nicht oder falsch montiertem Zentrifugenrotor 3, so wird die Kugel 9 durch den Druck des herangeführten Öls in ihre Dichtposition verstellt und verschließt somit den Strömungsweg.An adjusting
Das Gehäuse des Druckventils 6 ist in das Ölmodul 2 eingeschraubt. Der Strömungsweg durch die Ventile 6 und 7 liegt koaxial zur Längsachse 5 von Ölzentrifuge 1 und Zentrifugenrotor 3. Das Sicherheitsventil 7 ragt axial in das Zuströmrohr 11 ein, welches einteilig mit dem Zentrifugenrotor 3 ausgebildet ist und gemeinsam mit diesem umläuft; das Zuströmrohr 11 ist Teil des Strömungswegs des Öls zum Zentrifugenrotor 3. Der Strömungsweg weist eine Drosselstelle mit verringertem Strömungsquerschnitt auf, wobei die Drosselstelle aus Gründen der besseren Übersichtlichkeit hier nicht dargestellt ist. Die Drosselstelle kann hierbei an beliebiger Stelle im Strömungsweg zum Zentrifugenrotor 3 angeordnet sein, jedoch vor Austrittsöffnungen im Zuströmrohr 11 zum Einleiten des Öls in den Zentrifugenrotor 3. Die Drosselstelle kann beispielsweise im Gehäuse des Druckventils 6 oder des Sicherheitsventils 7 angeordnet sein. Die Drosselstelle kann jedoch auch stromab der Ventile 6 und 7 in das Zuströmrohr 11 oder stromauf der Ventile 6 und 7 in den Einlassabschnitt der Ölzentrifuge 1 eingebracht sein. Zumindest stromauf der Drosselstelle ist der Durchmesser bzw. Strömungsquerschnitt des Strömungswegs gegenüber der Drosselstelle erweitert. Eine vorteilhafte Form der Drosselstelle ist in
Der Zentrifugenrotor 3 ist über zwei axial beabstandete Lagerstellen drehbar gelagert. Eine erste Lagerstelle befindet sich an der Außenseite des Gehäuses des Druckventils 6 und ist entweder, wie in der linken Bildhälfte von
Axial beabstandet zur ersten Lagerstelle zwischen dem Druckventil 6 und dem Zentrifugenrotor 3 befindet sich an der Stirnseite des Zentrifugenrotors eine zweite Lagerstelle an der Innenseite des umgreifenden Gehäusebauteils 4. Diese zweite Lagerstelle ist als Gleitlager 14 ausgebildet und weist eine Gleitlagerbuchse 15 auf, die in die Stirnseite des Zuströmrohrs 11 am Zentrifugenrotor 3 eingesetzt ist, sowie einen Lagerbolzen 16, der über einen Gummidämpfer 17 an der Innenseite des Gehäusebauteils 4 gehalten ist und in die Gleitlagerbuchse 15 einragt. Der Lagerbolzen 16 ist beispielsweise als Stahlbolzen ausgeführt, die Gleitlagerbuchse 15 kann aus Sinterbronze bestehen.Axially spaced from the first bearing point between the
Der Strömungsweg durch die Ölzentrifuge 1 ist mit Pfeilen dargestellt. Zunächst erfolgt die Filtration im Ölfilter, von dessen Reinseite aus das Öl durch die Ventileinrichtung mit dem Druckventil 6 und dem Sicherheitsventil 7 axial in das Zuströmrohr des Zentrifugenrotors 3 geführt wird. Soweit beide Ventile 6, 7 offen stehen, gelangt das Öl wie mit den Pfeilen dargestellt, über Austrittsöffnungen in der Wandung des Zuströmrohrs 11 radial in die Rotorkammern des Zentrifugenrotors, wo eine Abscheidung von Partikeln stattfindet. Das Öl strömt anschließend axial nach unten und kann über Abströmöffnungen ausgeleitet werden. Aufgrund des Öldrucks und bei einer entsprechenden Ausgestaltung der Abströmöffnungen gerät der Zentrifugenrotor in Drehung um seine Längsachse 5.The flow path through the
Im Ausführungsbeispiel nach
Eine zweite Lagerstelle befindet sich mit verhältnismäßig geringem axialen Abstand an dem Sicherheitsventil 7 und ist ebenso wie die erste Lagerstelle entweder als Gleitlager 18 mit zwei Gleitlagerbuchsen ausgebildet, die gegebenenfalls aus unterschiedlichen Materialien bestehen können wie Stahl und Sinterbronze, oder als Kugellager 19. Die Lagerung erfolgt am Gehäuse des Sicherheitsventils 7 und an der Innenwand des Zuströmrohrs 11, das einteilig mit dem Zentrifugenrotor 3 ausgebildet ist.A second bearing point is located at a relatively small axial distance on the
In
Benachbart zum Einströmbereich 22, welcher dem Zentrifugenrotor 3 abgewandt ist, ist der Rohrabschnitt 21 mit einer Drosselstelle 23 versehen, die einen im Vergleich zu den sonstigen Querschnitten reduzierten Querschnitt aufweist. Der Durchmesser der Drosselstelle 23 ist mit dD gekennzeichnet, der Durchmesser des Rohrabschnitts 21 stromauf und stromab der Drosselstelle 23 beträgt dK, wobei der Drosselstellendurchmesser dD nicht mehr als 40 % bis 90 % des maximalen Durchmesser dK des Rohrabschnittes 21 beträgt. Beispielsweise beträgt der Drosselstellendurchmesser zwischen ca. 50 % und ca. 60 % des maximalen Durchmessers dK. Der Durchmesser dK des Rohrabschnittes 21 ist stromauf und stromab der Drosselstelle 23 gleich groß. Die Drosselstelle 23 ist beispielsweise nach Art einer Lavaldüse ausgebildet und dämpft Druckspitzen, wodurch die Belastung des Zentrifugenrotors 3 reduziert wird. Die Drosselstelle 23 befindet sich axial etwa mittig in dem Rohrabschnitt 21, der stirnseitig an den einteilig mit dem Rotoroberteil 32 ausgebildeten Abschnitt des Zuströmrohrs 11 angeflanscht ist. In einer nicht dargestellten alternativen Ausgestaltung ist der Durchmesser des Zuströmrohres 11 vor und hinter der Drosselstelle 23 unterschiedlich, wobei der Durchmesser zumindest stromauf der Drosselstelle 23 gegenüber dem Drosselstellendurchmesser erweitert ist.Adjacent to the
Der Zentrifugenrotor 3 ist in zwei Lagerstellen 24 und 25 drehbar gelagert. Die erste Lagerstelle 24 befindet sich an dem Rohrabschnitt 21 des bodenseitigen Rotorbauteils 31. Die zweite Lagerstelle 25 liegt auf der axial gegenüberliegenden Seite im oberen Bereich des Zentrifugenrotors 3; über die zweite Lagerstelle 25 ist der Zentrifugenrotor 3 am Gehäusebauteil 4 drehbar gelagert.The
Claims (13)
- Centrifugal oil filter with integrated, rotatably mounted centrifuge rotor (3), having an admission pipe (11) to the centrifuge rotor (3) and defining at least one portion of the flow path of the oil to the centrifuge rotor (3), wherein the flow path to the centrifuge rotor (3) features a throttle point (23) with reduced cross section, wherein the cross section is extended at least upstream of the throttle point (23), characterized in that the throttle point (23) is designed as Laval nozzle.
- Centrifugal oil filter according to claim 1, characterized in that the cross section is extended upstream of and downstream of the throttle point (23).
- Centrifugal oil filter according to claim 2, characterized in that the flow path features the same cross section upstream of and downstream of the throttle point (23).
- Centrifugal oil filter according to one of the claims 1 to 3, characterized in that the throttle point (23) is realized in the admission pipe (11).
- Centrifugal oil filter according to one of the claims 1 to 4, characterized in that the throttle point (23) is located in the inflow section of the centrifugal oil filter (1), in particular of the admission pipe (11).
- Centrifugal oil filter according to one of the claims 1 to 5, characterized in that the diameter of the throttle point (23) features a maximum of 90%, in particular a maximum of 70%, preferably a maximum of 50% of the largest diameter of the flow path.
- Centrifugal oil filter according to one of the claims 1 to 6, characterized in that the admission pipe (11) is connected to the centrifuge rotor (3) in a rotationally fixed manner.
- Centrifugal oil filter according to one of the claims 1 to 7, characterized in that the admission pipe (11) is realized in one piece with the centrifuge rotor (3).
- Centrifugal oil filter according to one of the claims 1 to 8, characterized in that a valve projects into the admission pipe (11).
- Centrifugal oil filter according to claim 9, characterized in that the valve is disposed upstream of the throttle point (23).
- Centrifugal oil filter according to claim 9 or 10, characterized in that the valve is designed as a safety valve (7), the valve body of which is held in opening position by the centrifuge rotor (3).
- Centrifugal oil filter according to one of the claims 1 to 11, characterized in that a pressure valve (6) and a safety valve (7) downstream of the pressure valve (6) are disposed in the inflow path to the centrifuge rotor (3), wherein the valve body of the safety valve (7) is held in opening position by the centrifuge rotor (3).
- Centrifuge rotor (3) for a centrifugal oil filter, in particular according to one of the preceding claims, having an admission pipe (11) to the centrifuge rotor (3) and defining at least one portion of the flow path of the oil to the centrifuge rotor (3), wherein the flow path to the centrifuge rotor (3) features a throttle point (23) with reduced cross section, wherein the cross section is extended at least upstream of the throttle point (23), characterized in that the throttle point (23) is designed as Laval nozzle.
Applications Claiming Priority (1)
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DE102013012673 | 2013-07-31 |
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EP2832448B1 true EP2832448B1 (en) | 2020-01-01 |
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EP14178737.4A Active EP2832448B1 (en) | 2013-07-31 | 2014-07-28 | Oil centrifuge with centrifuge rotor |
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US (1) | US9844785B2 (en) |
EP (1) | EP2832448B1 (en) |
DE (1) | DE102014010928A1 (en) |
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EP2832448B1 (en) * | 2013-07-31 | 2020-01-01 | Mann + Hummel Gmbh | Oil centrifuge with centrifuge rotor |
US10252280B2 (en) * | 2013-07-31 | 2019-04-09 | Mann+Hummel Gmbh | Oil centrifuge having a throttle point and safety valve |
GB2569167B (en) * | 2017-12-08 | 2020-10-14 | Mann & Hummel Gmbh | Filter assembly having a valve movable between closed and open configurations |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US5904841A (en) * | 1995-01-12 | 1999-05-18 | The Glacier Metal Company Limited | Fluid circulation centrifugal cleaner with pressure regulator |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
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GB246537A (en) | 1924-09-17 | 1926-01-18 | Richard Hollingsworth Griffin | An improved signalling apparatus for motor cars or other vehicles |
DE10063903A1 (en) * | 2000-12-21 | 2002-07-04 | Mann & Hummel Filter | Free jet centrifuge with integrated oil separator |
US6454694B1 (en) * | 2001-08-24 | 2002-09-24 | Fleetguard, Inc. | Free jet centrifuge rotor with internal flow bypass |
DE20213786U1 (en) * | 2002-09-04 | 2004-02-12 | Hengst Gmbh & Co.Kg | Centrifuge for cleaning lubricating oil of an internal combustion engine |
DE10329199B4 (en) | 2003-06-28 | 2016-08-04 | Mahle Filtersysteme Gmbh | Oil filter of an internal combustion engine of a particular motor vehicle |
GB2406893B (en) | 2003-10-08 | 2007-02-14 | Mann & Hummel Gmbh | Centifrugal separation apparatus and control valve arrangement therefor |
DE202004017820U1 (en) | 2004-11-17 | 2006-03-23 | Hengst Gmbh & Co.Kg | Free flow centrifuge for cleaning of internal combustion engine lubricating oil has inlet flow splitter and rotor with return nozzle for one flow and contaminant collector for second flow |
US7393317B2 (en) * | 2005-04-11 | 2008-07-01 | Cummins Filtration Ip, Inc. | Centrifuge rotor-detection oil-shutoff device |
US7377893B2 (en) * | 2005-04-25 | 2008-05-27 | Fleetguard, Inc. | Hero-turbine centrifuge with flow-isolated collection chamber |
DE102006021033A1 (en) * | 2006-05-05 | 2007-11-08 | Fleetguard, Inc., Nashville | Centrifuge has housing, which comprises fluid inlet for supply of fluid to centrifuge, where non-return valve is arranged in axle cavity and is in position to control flow of fluid from inlet connection |
GB2465374A (en) * | 2008-11-14 | 2010-05-19 | Mann & Hummel Gmbh | Centrifugal separator with venturi |
EP2832448B1 (en) * | 2013-07-31 | 2020-01-01 | Mann + Hummel Gmbh | Oil centrifuge with centrifuge rotor |
DE102013012670B4 (en) * | 2013-07-31 | 2015-06-18 | Mann + Hummel Gmbh | Oil centrifuge with centrifuge rotor |
-
2014
- 2014-07-28 EP EP14178737.4A patent/EP2832448B1/en active Active
- 2014-07-28 DE DE102014010928.3A patent/DE102014010928A1/en not_active Withdrawn
- 2014-07-31 US US14/448,052 patent/US9844785B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5904841A (en) * | 1995-01-12 | 1999-05-18 | The Glacier Metal Company Limited | Fluid circulation centrifugal cleaner with pressure regulator |
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EP2832448A1 (en) | 2015-02-04 |
US20150038310A1 (en) | 2015-02-05 |
DE102014010928A1 (en) | 2015-02-05 |
US9844785B2 (en) | 2017-12-19 |
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