WO2014007164A1 - オイルセパレータ - Google Patents
オイルセパレータ Download PDFInfo
- Publication number
- WO2014007164A1 WO2014007164A1 PCT/JP2013/067838 JP2013067838W WO2014007164A1 WO 2014007164 A1 WO2014007164 A1 WO 2014007164A1 JP 2013067838 W JP2013067838 W JP 2013067838W WO 2014007164 A1 WO2014007164 A1 WO 2014007164A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oil
- gas
- oil separator
- distribution chamber
- separation unit
- Prior art date
Links
- 238000000926 separation method Methods 0.000 claims abstract description 108
- 238000007599 discharging Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000003595 mist Substances 0.000 abstract description 58
- 239000002245 particle Substances 0.000 abstract description 12
- 239000003921 oil Substances 0.000 description 252
- 238000009413 insulation Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/005—Filters specially adapted for use in internal-combustion engine lubrication or fuel systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
-
- 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
- B04C5/02—Construction of inlets by which the vortex flow is generated, e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission
- B04C5/04—Tangential inlets
-
- 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
- B04C5/24—Multiple arrangement thereof
- B04C5/28—Multiple arrangement thereof for parallel flow
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- 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
- F01M13/0405—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in covering members apertures, e.g. caps
-
- 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
- F01M13/0416—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in valve-covers
-
- 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
- F01M2013/0038—Layout of crankcase breathing systems
- F01M2013/005—Layout of crankcase breathing systems having one or more deoilers
- F01M2013/0061—Layout of crankcase breathing systems having one or more deoilers having a plurality of deoilers
- F01M2013/0066—Layout of crankcase breathing systems having one or more deoilers having a plurality of deoilers in parallel
-
- 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
-
- 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 present invention relates to an oil separator for separating oil mist from blowby gas.
- the engine obtains power by burning a mixed gas in a combustion chamber and rotating a crankshaft. However, not all the mixed gas introduced into the combustion chamber is burned. Some mixed gas leaks into the crankcase from the gap between the piston and the cylinder. This leaked gas is called blowby gas. Exhausting the blow-by gas, which is unburned gas, to the atmosphere as the exhaust gas as it is, is prohibited by law in Japan in particular. Therefore, the blowby gas is again recirculated to the intake port side via a PCV (Positive Crankcase Ventilation) passage, burned in the combustion chamber together with the new mixed gas, and then discharged to the atmosphere.
- PCV Personal Crankcase Ventilation
- blow-by gas lubricating oil such as engine oil is present as oil mist.
- oil mist When blow-by gas containing oil mist is circulated to the intake port, oil adheres around the PCV passage and the intake port. Not desirable. Therefore, in order to collect the oil mist in the blowby gas, an oil separator is provided inside the cylinder head cover or in the middle of the PCV passage.
- Patent Document 1 discloses an oil separator using a plurality of cyclones.
- the said oil separator introduce
- the centrifugal force due to the swirling flow generated inside the cyclone condenses and collects the oil mist in the blowby gas.
- the blowby gas contains oil mist of various particle sizes.
- the blowby gas inlet is at the end, and the distances from the gas inlet to the respective cyclones arranged in a line are different.
- a large amount of oil mist having a large particle diameter is present near the gas inlet, and the particle diameter of the existing oil mist decreases as the distance from the gas inlet increases. This is because the oil mist having a large particle size has a large mass. Therefore, in the cyclone close to the gas inlet, a large amount of oil mist having a large particle diameter is collected, and when it is far from the gas inlet, the particle diameter of the oil mist collected by the cyclone decreases.
- each of the plurality of oil separation units collects oil mist in the blowby gas equally regardless of the particle size and efficiently separates the oil mist.
- An object of the present invention is to provide an oil separator that operates efficiently as a whole.
- the characterizing features of the oil separator are a distribution chamber for distributing blow-by gas, an inflow hole for flowing the blow-by gas into the distribution chamber, and a blow-by flowing into the distribution chamber through the inflow hole.
- At least one set of oil separation units arranged symmetrically with respect to at least one plane including the axis passing through the axial center of the inflow hole among the axes in the flow direction of gas, and each oil separation unit from the distribution chamber It is in the point provided with the branch passage which distributes blow-by gas to each separately.
- each of the branch passages has the same at least one of the passage cross-sectional area and the passage length.
- the amount per unit time of blowby gas flowing into the oil separation unit can be equalized, and all the oil separation units can exhibit the same degree of oil mist collection efficiency. .
- the entire oil separator can be efficiently operated with respect to the collection of the oil mist.
- At least one of the flow rate and the flow rate of the blowby gas flowing through each of the branch passages is the same.
- the amount per unit time of blow-by gas flowing into the oil separation unit can be equalized, and all the oil separation units can exhibit the same degree of oil mist collection efficiency. it can. As a result, the entire oil separator can be efficiently operated with respect to the collection of the oil mist.
- the oil separator further includes a gas discharge hole for discharging the blowby gas flowing out of the oil separation unit to the outside, and the gas discharge hole and the inflow hole are coaxial.
- the flow path length from the oil separation unit to the gas discharge hole is also the same. Therefore, blowby gas can be discharged uniformly from each oil separation unit. As a result, all the oil separation units can exhibit the same degree of gas discharge efficiency, and the entire oil separator can be efficiently operated not only for the collection of the oil mist but also for the exhaust of the blowby gas.
- the oil separator of the present configuration further includes a guide for guiding the blowby gas to the respective branch passages on the wall surface of the distribution chamber in the flow direction of the blowby gas entering the distribution chamber from the inflow hole. It is suitable.
- the blowby gas flowing into the distribution chamber can be uniformly guided to the branch passage by the guide, and all the oil separation units can exhibit the same degree of oil mist collection efficiency.
- the entire oil separator can be efficiently operated with respect to the collection of the oil mist.
- the oil separator of this configuration includes: a first lid that internally encloses the oil separation unit, the distribution chamber, the inflow hole, and the branch passage; and a second lid that internally encloses the first lid.
- a first lid that internally encloses the oil separation unit, the distribution chamber, the inflow hole, and the branch passage
- a second lid that internally encloses the first lid.
- at least a part of the side surface portion is formed in a two-layer structure by the first lid portion and the second lid portion.
- the influence of mutually contributing temperatures can be reduced. Therefore, for example, even if the outside of the second lid is extremely cold and the inside of the first lid is frozen, the temperature of the outside of the second lid causes the first lid to Since the temperature of the blowby gas supplied to the inside can be suppressed from decreasing, the inside of the first lid can be easily warmed by the blowby gas. Therefore, even when the oil separation unit, the distribution chamber, the inflow hole, and the branch passage are frozen, the blowby gas can be used to quickly thaw the oil separator to properly operate the oil separator. As a result, all the oil separation units can exhibit the same degree of oil mist collection efficiency, and the entire oil separator can be efficiently operated with respect to the collection of oil mist.
- the portion formed of the two-layer structure is a closed space.
- the heat insulation between the first cover and the second cover can be further improved. Therefore, even when the oil separation unit, the distribution chamber, the inflow hole, and the branch passage are frozen, the oil separator can be operated properly. As a result, the entire oil separator can be efficiently operated with respect to the collection of the oil mist.
- a space through which oil is discharged from the oil separation unit be formed inside the two-layer structure.
- a closed space is further formed between the portion formed of the two-layer structure and the space where the oil is discharged from the oil separation unit.
- another feature of the oil separator is at least one cyclone type oil separation unit for performing gas-liquid separation of blowby gas, and a distribution for distributing the blowby gas flowing into the oil separation unit.
- a second lid which encloses and encloses the first lid, the first lid including the first lid and the branch passage, and the second lid and the second lid. At least a part of the side surface portion is formed in a two-layer structure.
- the portion formed by the two-layer structure is a sealed space.
- the heat insulation between the first cover and the second cover can be further improved. Therefore, even when the oil separation unit, the distribution chamber, the inflow hole, and the branch passage are frozen, the oil separator can be operated properly. As a result, the entire oil separator can be efficiently operated with respect to the collection of the oil mist.
- a space through which the oil is discharged from the oil separation unit be formed inside the two-layer structure.
- a closed space be further formed between the portion formed of the two-layer structure and the space where the oil is discharged from the oil separation unit.
- FIG. 3 is a cross-sectional view taken along line III-III of FIG.
- FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3; It is a cross-sectional view showing arrangement
- FIG. 7 is a cross-sectional view taken along line VII-VII of FIG.
- FIG. 1 is an exploded perspective view showing the appearance of the oil separator 10 according to the present embodiment.
- FIG. 2 the longitudinal cross-sectional view showing the structure of the oil separator 10 is shown.
- FIG. 3 shows a cross-sectional view taken along the line III-III of FIG.
- FIG. 4 shows a cross-sectional view taken along line IV-IV of FIG.
- the oil separator 10 is disposed inside a head cover (not shown) of a vehicle engine.
- the oil separator 10 is made of resin.
- the oil separator 10 includes a housing 20 forming an outer wall, a first storage chamber 30 formed inside the housing 20, gas introduction pipes 32 and 32, and a distribution chamber 40. And branch passages 50, 50, 50, 50, oil separation units 60, 60, 60, 60, an oil discharge pipe 64, a second storage chamber 90, and a gas discharge hole 81.
- the first storage chamber 30 is a triangular prism-shaped space formed by the partition plate. A part of the bottom plate 21 constituting the housing 20 is the bottom surface 31 of the first storage chamber 30. As shown in FIG. 4, two gas introduction pipes 32, 32 are integrally formed on the bottom surface 31. Each gas introduction pipe 32 has a hole opened in the bottom surface 31 and a cylindrical wall projecting from the bottom plate 21 to the outside of the oil separator 10 including a cylindrical hole continuous with the hole. The gas introduction pipe 32 is connected to a gas introduction path (not shown).
- a circular inflow hole 41 is formed on the upper surface 33 of the first storage chamber 30.
- a distribution chamber 40 which is a cylindrical space is formed inside the housing 20 and on the opposite side of the inflow hole 41 to the first storage chamber 30.
- the first storage chamber 30 and the distribution chamber 40 communicate with each other through the inflow hole 41.
- the inner diameter of the distribution chamber 40 is equal to the inner diameter of the inflow hole 41, and the volume of the distribution chamber 40 is very small compared to the volume of the first storage chamber 30.
- Branch channels 50, 50, 50, 50 are formed on the side surfaces of the distribution chamber 40 and extend in parallel with the bottom surface 31 and radially outward.
- the distribution chamber 40 and the branch passage 50 communicate with each other.
- the four branch passages 50, 50, 50, 50 have the same passage cross-sectional area perpendicular to the flow direction of the blowby gas, and the same passage length.
- a first cover plate 70 is attached to the distribution chamber 40, the branch passages 50, 50, 50, 50 and the upper portions of oil separation units 60, 60, 60, 60 described later.
- the first lid plate 70 is joined with the upper end edge portion A of the distribution chamber 40, the branch passages 50, 50, 50, 50, and the oil separation units 60, 60, 60, 60 shown in FIG. It is done. As a result, the blowby gas flowing through does not flow out of the distribution chamber 40 or the branch passage 50 and reliably flows into the oil separation unit 60.
- the upper surface 42 (a part of the first lid plate 70) of the distribution chamber 40 is provided with a guide 43 projecting from the upper surface 42 toward the distribution chamber 40.
- the guide 43 is a quadrangular pyramid having a bottom surface in contact with the top surface 42. As shown in FIG. 3, the four side surfaces 43a, 43a, 43a, 43a of the guide 43 are formed to be perpendicular to the flow direction of the blowby gas in the four branch passages 50, 50, 50, 50 respectively. It is done.
- Oil separation units 60, 60, 60, 60 are connected to the ends of the branch passages 50, 50, 50, 50 opposite to the distribution chamber 40. Each oil separation unit 60 and the branch passage 50 communicate with each other.
- the oil separation unit 60 includes a main body 61, an oil discharger 62, and a gas discharger 63.
- the four oil separation units 60, 60, 60, 60 are all of the same size and arranged such that their respective axes are parallel and perpendicular to the blow-by gas flow direction of the branch passage 50. . Further, as shown in FIG.
- the branch passages 50, 50, 50, 50 and the oil separation units 60, 60, 60, 60 are perpendicular to each other in the plane X and the plane passing through the axial center of the inflow hole 41 (distribution chamber 40). It is arranged to be line symmetrical with respect to Y.
- the main body portion 61 includes a cylindrical cylindrical portion 61a, a cylindrical portion 61a continuous with the lower end of the cylindrical portion 61a and having a diameter reduced downward, and a cone portion 61b having a coaxial core.
- the branch passage 50 and the oil separation unit 60 are arranged such that the tangential direction of the inner peripheral surface of the cylindrical portion 61 a is the branch passage 50.
- An opening is formed as an oil discharge portion 62 at the lower end of the cone portion 61b.
- two oil separation units 60, 60 facing each other with respect to the plane X are disposed in proximity to each other, and two oil separation units 60, 60 facing each other with respect to the plane Y are spaced apart.
- two oil discharge pipes 64, 64 are formed to discharge the oil mist to the outside of the oil separator 10.
- the bottom plate 21 has a gentle downward slope toward the one oil discharge pipe 64 from the location intersecting with the axial centers of the two oil separation units 60, 60. It is formed for 64.
- the gas discharge part 63 is integrally formed with the first lid plate 70, and includes a hole opened in the first lid plate 70 and a cylindrical hole continuous with the hole, and an oil separation unit from the first lid plate 70 is formed. It has a cylindrical wall projecting toward 60.
- the lower end of the gas discharge part 63 is inside the cylindrical part 61a, and the axial center of the gas discharge part 63 is coaxial with the cylindrical part 61a.
- the upper end of the gas discharge portion 63 is open to the outside of the first cover plate 70.
- the four gas discharge parts 63 all have the same size.
- a second cover plate 80 which is a part of the housing 20 is disposed above the first cover plate 70 with a gap, and the first cover plate 70 and the second cover plate 80 2 A storage chamber 90 is formed.
- the second cover plate 80 is provided with a gas discharge hole 81 for discharging the blowby gas stored in the second storage chamber 90 to the outside of the oil separator 10.
- the blowby gas stored in the second storage chamber 90 is a blowby gas after the oil mist is separated by the oil separation unit 60, and hereinafter referred to simply as a gas.
- the axial center of the gas discharge hole 81 is coaxial with the distribution chamber 40.
- a gas discharge passage (not shown) is connected to the gas discharge hole 81.
- the other end of the gas discharge passage is connected to the intake port.
- the blowby gas is sucked by negative pressure generated by the air flowing through the intake port and flows through the inside of the oil separator 10.
- the blowby gas sucked from the crankcase and flowing through the gas introduction passage flows into the first storage chamber 30 from the gas introduction pipe 32.
- the inflowing blowby gas is temporarily stored in the first storage chamber 30.
- the blowby gas that has flowed into the distribution chamber 40 from the first storage chamber 30 collides with the side surface 43 a of the guide 43 and is uniformly distributed in four directions, and branch passages 50, 50, 50, It flows into 50.
- the blowby gas having flowed through the branch passages 50, 50, 50, 50 flows into the oil separation units 60, 60, 60, 60, and flows along the inner circumferential surfaces of the cylindrical portions 61a, 61a, 61a, 61a.
- the blowby gas forms a swirling flow that descends toward the cone portion 61b while swirling along the inner peripheral surface of the cylindrical portion 61a. Due to this swirling flow, a centrifugal force is generated in the blowby gas, and oil mist in the blowby gas collides with and adheres to the inner peripheral surfaces of the cylindrical portion 61a and the cone portion 61b. Thus, the oil mist is separated and collected from the blowby gas.
- the swirling directions in the oil separation units 60 are also symmetrical with respect to the plane X and the plane Y, respectively.
- the oil mist attached to the inner peripheral surface of the cylindrical portion 61a and the cone portion 61b is condensed while flowing down the wall surface of the cone portion 61b, and drops from the oil discharge portion 62 to the bottom plate 21.
- the dropped oil mist flows down the slope of the bottom plate 21, is discharged to the outside of the oil separator 10 through the internal passage of the oil discharge pipe 64, and is not shown. Will be returned to
- the gas flows into the second storage chamber 90 through the gas discharge portion 63 as indicated by the broken line arrow in FIG. Thereafter, the gas is discharged from the gas discharge hole 81, flows through the gas discharge passage, and is circulated to the intake port.
- branch passages 50, 50, 50, 50 and oil separation units 60, 60, 60, 60 are arranged radially around a distribution chamber 40 for distributing blowby gas, and a gas discharge hole 81 is a distribution chamber 40 and coaxial core are arranged.
- all of the four branch passages 50, 50, 50, 50 have the same passage cross-sectional area perpendicular to the flow direction of the blowby gas and the same passage length.
- the four oil separation units 60, 60, 60, 60 including the gas discharge part 63 are all the same size.
- the blowby gas uniformly flows into each of the four oil separation units 60, 60, 60, 60 in a state of containing oil mist of any particle diameter, and each oil separation unit 60 is a particle of oil mist
- the oil mist in the blowby gas can be uniformly collected regardless of the size of the diameter.
- the four oil separation units 60, 60, 60, 60 can exhibit the same degree of oil mist collection efficiency, and the entire oil separator 10 can be efficiently operated with respect to the collection of oil mist.
- the gas discharge hole 81 and the distribution chamber 40 are arranged coaxially, the flow from the gas discharge portion 63 to the gas discharge hole 81 via the second storage chamber 90 The road length is also the same. Therefore, gas can be discharged uniformly from each oil separation unit 60. As a result, the four oil separation units 60, 60, 60, 60 can exhibit the same degree of gas discharge efficiency, and the entire oil separator 10 can be efficiently operated even with respect to gas exhaust.
- the passage cross-sectional areas perpendicular to the flow direction of the blowby gas of the four branch passages 50, 50, 50 are equal, and the passage lengths are also equal, but not limited thereto. Only one of the passage cross sectional area and the passage length may be the same.
- the passage cross sectional area and the passage length may be set. Specifically, the passage cross-sectional area of the branch passage 50 having a long passage length is wide, and the passage cross-sectional area of the branch passage 50 having a short passage length is narrow. Further, the cross-sectional area and the passage length of the branch passage 50 may be set so that the flow rates of the blowby gas flowing through the four branch passages 50, 50, 50, 50 become the same.
- the branch passages 50, 50, 50, 50 and the oil separation units 60, 60, 60, 60 are arranged to be symmetrical with respect to the plane X and the plane Y. I can not. It may be arranged to be symmetrical with respect to any one plane of the plane X or the plane Y.
- FIG. 5 is a cross-sectional view showing the arrangement of the branch passage 50 and the oil separation unit 60 of the oil separator 10 according to a modification of the first embodiment.
- the same reference numeral is attached to the same part as that of the first embodiment, and the description of the same part is omitted.
- the four branch passages 50, 50, 50, 50 are arranged 90 degrees apart from each other, and the swirling of the swirling flow of the blowby gas in all the oil separation units 60, 60, 60, 60
- the arrangement of the branch passage 50 and the oil separation unit 60 is determined such that the directions are the same.
- the other configuration is the same as that of the first embodiment.
- the branch passage 50 and the oil separation unit 60 By arranging the branch passage 50 and the oil separation unit 60 in this manner, the mounting area of the oil separator 10 as viewed along the axial direction of the guide 43 can be minimized, and the four oil separation units are arranged. 60, 60, 60, 60 can exhibit the same oil mist collection efficiency. As a result, the entire oil separator 10 can be efficiently operated with regard to the collection of the oil mist and the exhaust of the gas.
- FIG. 6 is a longitudinal sectional view showing a schematic configuration of an oil separator 10 according to a second embodiment.
- FIG. 7 shows a cross-sectional view taken along the line VII-VII of FIG.
- the inflow hole 41 is formed at the end of the housing 20, and the axes of the four oil separation units 60, 60, 60, 60 are arranged in a line on the plane X. It differs from the embodiment. Furthermore, the point that the gas discharge hole 81 is provided at the end of the oil separator 10 is also different from the first embodiment.
- the thickness in the direction perpendicular to the plane X of the oil separator 10 is first implemented It can be thinner than the form.
- the passage cross-sectional area and the passage length perpendicular to the flow direction of the outer branch flow channels 50a, 50a directed from the inflow hole 41 to the two outer oil separation units 60a, 60a arranged outward are
- the passage cross-sectional area is larger and the passage length is longer than the passage cross-sectional area and the passage length perpendicular to the flow direction of the inner branch flow passage 50b, 50b directed to the two inner oil separation units 60b, 60b arranged .
- the amount per unit time of the blowby gas flowing into the two outer oil separation units 60a, 60a and the flow rate per unit time of the blowby gas flowing into the two inner oil separation units 60b, 60b are made the same.
- the four oil separation units 60, 60, 60, 60 can exhibit the same degree of oil mist collection efficiency, and the entire oil separator 10 can be operated efficiently.
- the oil separator 10 can be expressed as follows.
- the oil separator 10 includes at least one cyclone-type oil separation unit 60 for performing gas-liquid separation of blow-by gas, a distribution chamber 40 for distributing the blow-by gas flowing into the oil separation unit 60, and blow-by the distribution chamber 40.
- a first lid plate 70 (corresponding to the “first lid portion” according to the present invention) that encloses and encloses the inside, and a second lid plate 80 that encloses the first lid plate 70 inside the 2), and at least a part of the side surface portion can be formed in a two-layer structure by the first cover plate 70 and the second cover plate 80.
- the influence of the mutually contributing temperatures can be reduced. Therefore, for example, even when the outside of the second cover plate 80 is at a cryogenic temperature and the inside of the first cover plate 70 is frozen, the temperature of the outside of the second cover plate 80 causes the first Since the temperature of the blowby gas supplied to the inside of the cover plate 70 can be suppressed from decreasing, the inside of the first cover plate 70 can be easily warmed by the blowby gas. Therefore, even if each of the oil separation unit 60, the distribution chamber 40, the inflow hole 41, and the branch passage 50 is frozen, the blowby gas is quickly de-iceized to properly operate the oil separator 10 Can. As a result, all the oil separation units 60 can exhibit the same degree of oil mist collection efficiency, and the entire oil separator 10 can be efficiently operated with respect to the collection of oil mist.
- oil separator 10 can be a sealed space in a portion formed of a two-layer structure.
- the heat insulation between the first cover plate 70 and the second cover plate 80 can be further improved. Therefore, even when each of the oil separation unit 60, the distribution chamber 40, the inflow hole 41, and the branch passage 50 is frozen, the oil separator 10 can be appropriately operated promptly. As a result, the entire oil separator 10 can be efficiently operated with respect to the collection of the oil mist.
- a space in which the oil is discharged from the oil separation unit 60 can be formed inside the two-layer structure.
- the heat insulation of the space where oil is discharged from oil separation unit 60 can be improved. Therefore, even when the space is frozen, the oil separator 10 can be properly operated promptly. As a result, the entire oil separator 10 can be efficiently operated with respect to the collection of the oil mist.
- a closed space can be further formed between a portion formed of a two-layer structure and a space where oil is discharged from the oil separation unit 60.
- oil separation unit 60 heat insulation of the space where oil is discharged from oil separation unit 60 can be further improved. Therefore, even when the space is frozen, the oil separator 10 can be properly operated promptly. As a result, all the oil separation units 60 can exhibit the same degree of gas discharge efficiency, and efficiently operate the entire oil separator 10 not only for the collection of oil mist but also for the exhaust of blowby gas. it can.
- the present invention can be used for an oil separator that separates oil mist from blowby gas.
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Abstract
Description
〔オイルセパレータの構造〕
以下、本発明の実施の形態について、詳細に説明する。図1に、本実施形態に係るオイルセパレータ10の外観を表す分解斜視図を示す。図2に、オイルセパレータ10の構造を表す縦断面図を示す。図3に、図2のIII-III線断面図を示す。図4に図3のIV-IV線断面図を示す。オイルセパレータ10は、車両のエンジンのヘッドカバー内部(不図示)に配置されている。オイルセパレータ10は樹脂製である。
ガス排出路の他端は吸気ポートに接続されている。ブローバイガスは吸気ポートを流通する空気により発生する負圧で吸引されてオイルセパレータ10の内部を流通する。図4に示すように、クランクケースから吸引されガス導入路を流通したブローバイガスは、ガス導入管32から第1貯留室30内に流入する。流入したブローバイガスは第1貯留室30内に一旦貯留される。図2,図3に示すように、第1貯留室30から分配室40に流入したブローバイガスは、ガイド43の側面43aに衝突し4方向に均等に分配され、分岐通路50,50,50,50に流入する。
オイルセパレータ10は、ブローバイガスを分配する分配室40を中心に分岐通路50,50,50,50やオイル分離ユニット60,60,60,60が放射状に配置され、且つガス排出孔81が分配室40と同軸芯上に配置されている。また上述したように、4つの分岐通路50,50,50,50はいずれもブローバイガスの流通方向に垂直な通路断面積が等しく通路長さも同じである。さらに、ガス排出部63を含む4つのオイル分離ユニット60,60,60,60もいずれも同じ大きさである。従って、ブローバイガスは、あらゆる粒径のオイルミストを含有した状態で4つのオイル分離ユニット60,60,60,60のそれぞれに均等に流入し、それぞれのオイル分離ユニット60はいずれもオイルミストの粒径の大小に関係なくブローバイガス中のオイルミストを均等に捕集することができる。この結果、4つのオイル分離ユニット60,60,60,60は同程度のオイルミスト捕集効率を発揮することができ、オイルミストの捕集に関してオイルセパレータ10全体を効率よく作動させることができる。
図5に、第1実施形態の変形例に係るオイルセパレータ10の分岐通路50およびオイル分離ユニット60の配置を表す横断面図を示す。以下の実施形態および変形例の説明においては、第1実施形態と同じ構成の箇所には同じ符号を付し、同様の構成に関する説明は省略する。本変形例は4つの分岐通路50,50,50,50が互いに90度の間隔を開けて配置されると共に、全てのオイル分離ユニット60,60,60,60内のブローバイガスの旋回流の旋回方向が同方向になるように分岐通路50とオイル分離ユニット60の配置が定められている。その他の構成は第1実施形態と同様である。
図6に、第2実施形態に係るオイルセパレータ10の概略構成を表す縦断面図を示す。図7に、図6のVII-VII線断面図を示す。本実施形態は、流入孔41がハウジング20の端部に形成されると共に、4つのオイル分離ユニット60,60,60,60の軸芯が平面X上に一列に配置されている点が第1実施形態と異なる。さらにガス排出孔81がオイルセパレータ10の端部に設けられている点も第1実施形態と異なる。4本の軸芯が平面X上にくるように4つのオイル分離ユニット60,60,60,60を一列に配置することにより、オイルセパレータ10の平面Xに垂直な方向の厚さを第1実施形態に比べてさらに薄くすることができる。
オイルセパレータ10は、ブローバイガスの気液分離を行う少なくとも1組のサイクロン式のオイル分離ユニット60と、当該オイル分離ユニット60に流入するブローバイガスを分配する分配室40と、当該分配室40にブローバイガスを流入させる流入孔41と、分配室40から各々のオイル分離ユニット60までブローバイガスを各別に流通させる分岐通路50と、オイル分離ユニット60と分配室40と流入孔41と分岐通路50とを内部に含んで囲む第1蓋板70(本発明に係る「第1蓋部」に相当)と、当該第1蓋板70を内部に含んで囲む第2蓋板80(本発明に係る「第2蓋部」に相当)と、を備え、第1蓋板70と第2蓋板80とにより側面部の少なくとも一部を2層構造に形成することが可能である。
40 分配室
41 流入孔
43 ガイド
50 分岐通路
60 オイル分離ユニット
70 第1蓋板(第1蓋部)
80 第2蓋板(第2蓋部)
81 ガス排出孔
X 平面
Y 平面
Claims (13)
- ブローバイガスを分配する分配室と、
前記分配室にブローバイガスを流入させる流入孔と、
前記流入孔を通って前記分配室へ流入するブローバイガスの流通方向の軸のうち前記流入孔の軸芯を通る軸を含む少なくとも1つの平面に対して対称に配置される少なくとも1組のオイル分離ユニットと、
前記分配室から各々の前記オイル分離ユニットまでブローバイガスを各別に流通させる分岐通路と、を備えたオイルセパレータ。 - それぞれの前記分岐通路は、通路断面積と通路長さのうち少なくとも一方が同じである請求項1に記載のオイルセパレータ。
- それぞれの前記分岐通路を流通するブローバイガスの流量と流速のうち少なくとも一方が同じである請求項1に記載のオイルセパレータ。
- 前記オイル分離ユニットから流出したブローバイガスを外部に排出するガス排出孔をさらに備え、
前記ガス排出孔と前記流入孔が同軸芯上にある請求項1乃至3のいずれか一項に記載のオイルセパレータ。 - 前記流入孔から前記分配室に入ったブローバイガスの流通方向にある前記分配室の壁面に、ブローバイガスをぞれぞれの前記分岐通路に導くガイドをさらに有する請求項1乃至4のいずれか一項に記載のオイルセパレータ。
- 前記オイル分離ユニットと前記分配室と前記流入孔と前記分岐通路とを内部に含んで囲む第1蓋部と、
前記第1蓋部を内部に含んで囲む第2蓋部と、を備え、
前記第1蓋部と前記第2蓋部とにより側面部の少なくとも一部を2層構造に形成してある請求項1乃至5のいずれか一項に記載のオイルセパレータ。 - 前記2層構造で形成されてある部分が密閉空間である請求項6に記載のオイルセパレータ。
- 前記オイル分離ユニットからオイルが排出される空間が、前記2層構造の内側に形成されてある請求項6又は7に記載のオイルセパレータ。
- 前記2層構造で形成されてある部分と、前記オイル分離ユニットからオイルが排出される空間との間に、更に閉空間が形成されてある請求項8に記載のオイルセパレータ。
- ブローバイガスの気液分離を行う少なくとも1組のサイクロン式のオイル分離ユニットと、
前記オイル分離ユニットに流入するブローバイガスを分配する分配室と、
前記分配室にブローバイガスを流入させる流入孔と、
前記分配室から各々の前記オイル分離ユニットまでブローバイガスを各別に流通させる分岐通路と、
前記オイル分離ユニットと前記分配室と前記流入孔と前記分岐通路とを内部に含んで囲む第1蓋部と、
前記第1蓋部を内部に含んで囲む第2蓋部と、を備え、
前記第1蓋部と前記第2蓋部とにより側面部の少なくとも一部を2層構造に形成してあるオイルセパレータ。 - 前記2層構造で形成されてある部分が密閉空間である請求項10に記載のオイルセパレータ。
- 前記オイル分離ユニットからオイルが排出される空間が、前記2層構造の内側に形成されてある請求項10又は11に記載のオイルセパレータ。
- 前記2層構造で形成されてある部分と、前記オイル分離ユニットからオイルが排出される空間との間に、更に閉空間が形成されてある請求項12に記載のオイルセパレータ。
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CN201380033562.XA CN104520546B (zh) | 2012-07-04 | 2013-06-28 | 油分离器 |
EP13813825.0A EP2868878B1 (en) | 2012-07-04 | 2013-06-28 | Oil separator |
BR112014032955A BR112014032955A8 (pt) | 2012-07-04 | 2013-06-28 | Separador de óleo |
US14/412,088 US9630128B2 (en) | 2012-07-04 | 2013-06-28 | Oil separator |
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JP2012-256710 | 2012-11-22 | ||
JP2012256710A JP5495402B2 (ja) | 2012-11-22 | 2012-11-22 | オイルセパレータ |
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CN109681619A (zh) * | 2017-10-19 | 2019-04-26 | 上海汽车集团股份有限公司 | 一种变速箱的配油系统及配油盘总成 |
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EP3541528A4 (en) * | 2016-11-17 | 2020-07-22 | Weir Minerals Australia Ltd | DISTRIBUTION DEVICE FOR CYCLONE SEPARATOR |
CN108301935B (zh) * | 2018-03-28 | 2024-02-20 | 潍柴动力股份有限公司 | 油气分离器壳体及柴油车 |
DE102021214660A1 (de) | 2021-12-20 | 2023-06-22 | Robert Bosch Gesellschaft mit beschränkter Haftung | Flüssigkeitsfilter |
DE102021214658A1 (de) | 2021-12-20 | 2023-06-22 | Robert Bosch Gesellschaft mit beschränkter Haftung | Bauteil für einen Flüssigkeitsfilter |
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US20150182891A1 (en) | 2015-07-02 |
US9630128B2 (en) | 2017-04-25 |
CN104520546A (zh) | 2015-04-15 |
BR112014032955A8 (pt) | 2017-07-11 |
EP2868878B1 (en) | 2017-06-21 |
CN104520546B (zh) | 2017-09-01 |
IN2015DN00564A (ja) | 2015-06-26 |
BR112014032955A2 (pt) | 2017-06-27 |
EP2868878A4 (en) | 2016-04-13 |
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