Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
  • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
  • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
  • B04C5/08—Vortex chamber constructions
  • B04C5/103—Bodies or members, e.g. bulkheads, guides, in the vortex chamber
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
  • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
  • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
  • B04C5/12—Construction of the overflow ducting, e.g. diffusing or spiral exits
  • B04C5/13—Construction of the overflow ducting, e.g. diffusing or spiral exits formed as a vortex finder and extending into the vortex chamber; Discharge from vortex finder otherwise than at the top of the cyclone; Devices for controlling the overflow
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
  • F01M13/00—Crankcase ventilating or breathing
  • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
  • F01M13/00—Crankcase ventilating or breathing
  • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
  • F01M2013/0422—Separating oil and gas with a centrifuge device
  • F01M2013/0427—Separating oil and gas with a centrifuge device the centrifuge device having no rotating part, e.g. cyclone

Definitions

• the invention relates to an oil separator for de-oiling crankcase ventilation gases of an internal combustion engine, wherein the oil separator comprises at least one cyclone having a gas inlet, wherein the cyclone is associated with a lid in which a gas outlet is arranged, and wherein the cyclone in its interior Is assigned rejection element.
• EP 1 095 209 B1 relates to an oil separator for deoiling crankcase ventilation gases of an internal combustion engine, wherein the oil separator comprises at least one cyclone having a gas inlet connected to the crankcase of the internal combustion engine, a gas outlet connected to the air intake tract of the internal combustion engine and one with the oil sump Internal combustion engine has associated oil outlet.
• the gas outlet protrudes as a dip tube through a top closing the cyclone in the cyclone interior.
• a gas line section is provided above the cover with a jumped to at least twice the enlarged cross-section. From the gas line section, accumulating oil can be returned to the oil outlet or to the oil sump.
• the dip tube ends just above the lid. From the top of the lid, starting from the gas a ⁇ lableitkanal separated from the dip tube to the oil outlet or led to the oil sump.
• DE 100 65 328 A1 discloses a gas / liquid separator having a generally cylindrical container defining inside a cyclone chamber and having a gas inlet disposed on an inner peripheral wall of the cyclone chamber for introducing a gas into the cyclone chamber in a circumferential direction of the cyclone chamber for separating a liquid component from the gas through a centrifugal separation action, with a gas passageway having a gas outlet connected to the cyclone chamber via the gas outlet, the gas outlet being disposed separately from the gas inlet in the axial direction of the container , and a baffle disposed in the cyclone chamber and generally dividing a space between the gas outlet and the gas inlet to form a gas flow flowing from the gas inlet to the gas outlet along the inner peripheral wall, the gas passage conduit from the baffle at the gas inlet projected side.
• DE 43 44 507 Al deals with a cyclone for the separation of oil from oil-containing aerosols.
• the exhaust port is flared from its lower inlet end to its upper outlet end.
• the exhaust pipe is enclosed near its inlet end by a hollow cone-shaped Abweisring whose larger diameter faces the inlet end.
• Cyclones as oil separators are known in the crankcase ventilation area.
• the cyclones reduce the requirement to reduce the oil content in the blow-by gas (crankcase ventilation gas).
• the geometry is designed and designed in such a way that effectively the finest oil mist droplets (fine oil: x T ro Pfe n ⁇ 10 ⁇ m) are deposited.
• the cyclone or the cyclone size with respect to the differential pressure behavior is adapted to the operating conditions of the engine, in particular its blow-by map, adjusted so that sufficiently wide cyclone differential pressures prevail over wide engine operating ranges for effective fine oil separation.
• baffles or deflector rings are used around the dip tube, such. B. in DE 100 65 328 Al and in DE 43 44 507 Al executed. However, these designs do not show the desired effect for the requirements in the crankcase ventilation area.
• Entrained oil components can basically be traced back to the cyclone oil outlet by the so-called pure-side oil drain holes from the immersion pipe clean side, as comprehensively shown in EP 1 095 209, which has proven itself in practice.
• this existing solution must be adapted to the relatively high coarse oil volumes accordingly and means a correspondingly increased technical standard when implemented in series Effort and space requirements and thus additional costs.
• the gas outlet in the cover can be designed as a dip tube, which protrudes into the interior of the cyclone.
• the gas outlet can also be designed as a simple line, which is introduced only in the lid and preferably flush with the bottom of the lid, so it does not protrude into the interior of the cyclone.
• the rejection element has a free edge, which is designed with respect to the cover in the circumferential direction of the cyclone with varying lengths or heights. It is expedient for the purposes of the invention if the rejection element is arranged to run concentrically around the center axis in the interior of the cyclone, so that the deflecting element is arranged in a quasi-cylindrical manner in a cross section through the cyclone. Conceivable, however, is of course any geometric configuration of the rejection element, for example, a quadrangular in cross-section design or the like.
• the rejection element is advantageously arranged on or connected to the cover and extends with its free edge in the direction of a cone-shaped region of the cyclone opposite the cover, at the apex of which the oil outlet is preferably arranged.
• the rejection element has a course at its free edge, which resembles quasi an obliquely cut cylinder.
• the rejection element with respect to the lid advantageously has a minimum height (hs m i n ) and a maximum height (hS ma x), which are arranged diametrically opposite relative to a central axis of the cyclone.
• the deposited on the Abweiselement drops run on its outer wall to the free edge. Drops adhering to the free edge are conveyed by the vortex flow to the deepest point of the rejection element (hS max ), so that the oil drops drip at this point in a targeted and continuous manner.
• the maximum height (hs ma x) / thus the lowest point of the rejection element is in particular in their position to the gas inlet in Inside of the cyclone depending on the application determinable or variable.
• the targeted dripping at a defined location relative to the position of the gas inlet is desirable in order to prevent subsequent entrainment of the squirting droplets through the flow in the gas outlet or in the dip tube and thus on the cyclone clean. Therefore, the rejection element advantageously has the special geometric design or manner of length increase in coordination with the prevailing vortex flow formation and thus the cyclone geometry.
• the rejection element has at least one drip edge.
• the height or longitudinal extent of the rejection element abruptly decreases at one point.
• the rejection element expediently has a minimum height (hs m i n ) and a maximum height (hs max ), which are arranged one above the other when viewed in the vertical direction.
• the free edge preferably runs helical or spiral from the minimum height (hs m i n ) in the direction of the maximum height (hs max ).
• the free edge is perpendicular, ie parallel to the central axis, so that the arranged in this area free edge can be referred to as a trailing edge.
• the rejection element may have two drip edges, which are arranged diametrically opposite relative to the central axis of the cyclone.
• the rejection element has two circular section-like wall sections which are diametrically opposed to the central axis. te, whose maximum height (hs max ) and minimum height (hs m i n ) are each arranged on a plane, wherein the respective minimum height (hs m i n ) abruptly decreases to the respective maximum height (hs ma ⁇ ) the desired run-off edge is formed.
• the free edge extending between the respective wall sections extends continuously inclined from the respective minimum height (hs m i n ) to the respective maximum height (hs max ), wherein the diametrically opposite, continuously inclined free edges are inclined in opposite directions.
• the rejection element has a plurality of drip edges, so that the rejection element is executed at its free edges quasi sawtooth-like.
• the respective minimum height (hs m i n ) abruptly decreases to the respective maximum height (hs max ) for the formation of the respective run-off edge.
• the rejection element can be designed as a segment-like segment which extends from the lid in the direction of the cone-shaped region.
• the gas inlet is arranged in the lower region of the cyclone, that is to say in the vicinity of its cone-shaped region.
• the gas inlet is positioned at a defined distance from the lid. It is expedient in this case if the rejection element is connected to the conical region, wherein the rejection element has a cutout, so that a free edge is formed.
• the height of the rejection element may also abruptly decrease from hs ma ⁇ to hs ra i n to form the trailing edge.
• the dimensioning of the minimum height and the maximum height here refers to the point of attachment of the rejection element to the conical region of the cyclone.
• the gas inlet can not only be made round, but have all suitable geometrical configurations.
• the gas inlet can be made square.
• Oil recirculation of the separated oil may e.g. via a siphon or, for example, via an oil tank with oil return valve.
• FIG. 2 shows the cyclone from FIG. 1 with a further embodiment of the rejection element
• FIG. 3 shows the cyclone from FIG. 1 with a further embodiment of the rejection element
• FIG. 4 shows the cyclone from FIG. 1 with a further embodiment of the rejection element
• Fig. 5 shows the cyclone of Figure 1 with a further embodiment of the rejection element
• FIG. 6 shows a cyclone with a gas inlet at the bottom and a further embodiment of the deflecting element in a perspective view.
• FIG. 1 shows a cyclone 1 of an oil separator for de-oiling crankcase ventilation gases (blow-by-gas) of an internal combustion engine.
• the cyclone 1 has a gas inlet 2, wherein the cyclone 1 is associated with a cover 3.
• a gas outlet 4 is arranged, which projects somewhat into the interior 7 of the cyclone 1 in the embodiment shown in Figure 1 as a dip tube 6.
• the dip tube 6 or the gas outlet 4 is arranged concentrically around a central axis X of the cyclone 1 around.
• a rejection element 9 is arranged in the interior 7 of the cyclone 1.
• the rejection element 9 is viewed in the circumferential direction of the cyclone 1 with respect to the cover 3 with varying longitudinal extent.
• the cyclone 1 has a cylindrical region 11, which is closed at the top by the cover 3, and a conical region 12 adjoining the cylindrical region 11 at the bottom.
• the conical region 12 opens with its conical tip directed away from the cover 3 into an oil outlet 13.
• the rejection element 9 has a free edge 16, which is designed with respect to the cover 3 in the circumferential direction of the cyclone 1 with varying lengths or heights.
• the deflector 9 is arranged concentrically around the central axis X of the cyclone 1 between its wall and the dip tube 6 and has a quasi-hollow cylindrical configuration.
• the deflector 9 is connected to the lid 3, wherein a cohesive connection may be provided. But it is also possible a one-piece production of the lid 3 with the rejection element 9 and possibly with the dip tube 6 and the gas outlet. 4 With its lid 3 opposite free edge 16, the deflector 9 extends in the direction of the cone-shaped portion 12th
• the deflector element 9 At its free edge 16, the deflector element 9 has a course which resembles a hollow cylinder cut off obliquely.
• the rejection element 9 advantageously has a minimum height (hs m i n , referred to by reference numeral 17 in the figures 1 to 5) and a maximum height (hs max , in FIGS. designated by the reference numeral 18), which are arranged diametrically opposite to the central axis X of the cyclone 1.
• the deposited on the rejection element 9 drops run on its outer wall to the free edge 16.
• the free edge 16 runs perpendicular, ie parallel to the central axis X, so that the free edge 16 arranged in this region is referred to as the discharge edge 23 can.
• the running between the respective wall sections 28 free edge 16 in this case runs continuously inclined from the respective minimum height (hs ra i n ) to the respective maximum height (hs ma ⁇ ), wherein the diametrically opposed continuously sloping free edges 16 are inclined in opposite directions.
• the dip tube 6 does not protrude into the cyclone 1 by way of example.
• Figure 4 shows a further embodiment of the Abweiselements 29, which has a plurality of Abtropfkanten 31, so that the Abweiselement 29 is carried out at its free edges 16 quasi sawtooth.
• the respective minimum height (hs m i n ) decreases abruptly to the respective maximum height (hs max ), in order to form one of the several trailing edges 31 in each case.
• the illustrated number of drip edges 31 is only exemplary and not intended to be limiting; it may also be provided more or less dripping edges 31.
• FIG. 5 shows a further embodiment of the deflection element 32, which is designed as a segment segment-like segment which extends from the cover 3 in the direction of the conical region 12. Furthermore, in contrast to FIGS. 1 to 4, FIG. 5 shows a quadrangular gas inlet 2.
• the free edge 16 with respect to the lid 3 has a varying longitudinal extent or height.
• the free edge 16 runs from the maximum height hs max to the minimum height hs m i n in a perspective manner in a wing-like manner.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
• Cyclones (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=38442605

Family Applications (1)

Country Status (4)

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Family Cites Families (17)

• 2006
  • 2006-05-11 DE DE202006007625U patent/DE202006007625U1/de not_active Expired - Lifetime
• 2007
  • 2007-05-08 EP EP07724996A patent/EP2018467B1/fr not_active Not-in-force
  • 2007-05-08 AT AT07724996T patent/ATE478241T1/de active
  • 2007-05-08 WO PCT/EP2007/004073 patent/WO2007131670A2/fr not_active Ceased
  • 2007-05-08 DE DE502007004792T patent/DE502007004792D1/de active Active

Non-Patent Citations (1)

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