WO2017175324A1 - オイルセパレータ - Google Patents
オイルセパレータ Download PDFInfo
- Publication number
- WO2017175324A1 WO2017175324A1 PCT/JP2016/061209 JP2016061209W WO2017175324A1 WO 2017175324 A1 WO2017175324 A1 WO 2017175324A1 JP 2016061209 W JP2016061209 W JP 2016061209W WO 2017175324 A1 WO2017175324 A1 WO 2017175324A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oil
- partition wall
- rotor
- separation
- spindle
- Prior art date
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Classifications
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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
-
- 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
- B01D45/14—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by rotating vanes, discs, drums or brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B5/00—Other centrifuges
- B04B5/08—Centrifuges for separating predominantly gaseous mixtures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B5/00—Other centrifuges
- B04B5/12—Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
- B04B7/02—Casings; Lids
- B04B7/04—Casings facilitating discharge
-
- 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
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/04—Filling or draining lubricant of or from machines or engines
- F01M11/0458—Lubricant filling and draining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B5/00—Other centrifuges
- B04B5/12—Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers
- B04B2005/125—Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers the rotors comprising separating walls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B5/00—Other centrifuges
- B04B5/005—Centrifugal separators or filters for fluid circulation systems, e.g. for lubricant oil circulation systems
-
- 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
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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
- F01M2013/0438—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a filter
Definitions
- the present invention relates to an oil separator that separates mist oil contained in a gas to be treated from the gas.
- a cylindrical upper housing (2) is provided on the cylindrical lower casing (1), and the upper upper side of the upper housing (2) is closed by the ceiling (3), so that the upper housing (2) The hollow lower side is closed by a partition (5).
- a gas purification device (13) for purifying gas is provided inside the upper housing (2), and a centrifugal rotor (11) for purifying liquid is provided inside the lower casing (1). It has been.
- the gas purification device (13) is a centrifugal oil separator, and the rotor of the gas purification device (13) is composed of a plurality of stacked separation disks (37). These separation discs (37) are held by these holders (35, 36) by being sandwiched between a plate-like upper holder (36) and a lower holder (35). The separation disk (37), the upper holder (36), and the lower holder (35) rotate together with the centrifugal rotor (11) using the hydraulic pressure of the centrifugal rotor (11). An opening is formed in the central portion of the separation disk (37). And the suction chamber (39) is formed in the center part of the laminated body of the separation disk (37) when the opening of these separation disks (37) overlaps up and down. A hole (38) is formed in the lower holder (35) at a position above the opening (8) of the partition (5).
- Blow-by gas (processing target gas) from the crankcase passes through the opening (8) of the partition (5) and the hole (38) of the lower holder (35) from the lower casing (1) to the suction chamber (39). Inflow.
- mist oil contained in the blow-by gas is trapped in the gap between the separation disks (37).
- the blow-by gas blown from the outer periphery of the separation disk (37) rises in the upper housing (2) and is discharged.
- the oil trapped in the gap between the separation discs (37) is blown out toward the inner peripheral surface of the upper housing (2) by the centrifugal force of the separation disc (37), and the oil adhering to the inner peripheral surface is Flow down along the surface. In this way, the gas to be treated and the mist oil contained therein are separated and purified.
- the oil discharged from the separation disk is removed from the inner wall of the case (the upper housing (2)). It hangs down along the inner peripheral surface) and is discharged from the flow path near the lower bearing to the crankcase side.
- a blow-by gas with an extremely high flow rate is generated, and a plurality of separations constituting the rotor are to be coped with when a large amount of oil temporarily flows into a small amount of oil handled normally by the oil separator.
- a downward communication hole is provided on the center side of the lower holder that holds the disk from below, and oil can be discharged from the communication hole.
- the present invention has been made in view of such circumstances, and enables continuous oil discharge from the separation chamber, preventing oil from collecting in the separation chamber and preventing oil immersion in the rotor.
- the purpose is to make it possible.
- Another object of the present invention is to improve the oil discharge performance by preventing negative pressure from being generated inside the case.
- the oil separator according to the present invention is: A gas to be treated containing mist-like oil and separation oil are introduced into an inner circumferential space of a rotor that is rotatably provided with a spindle, and the rotor is rotated to rotate the mist-like oil from the gas to be treated.
- An oil separator to separate A case having an internal space for accommodating a separation chamber having the spindle and the rotor and an inlet hole leading to the internal space; A lower partition member disposed at the lower end of the internal space and having a through-hole through which the spindle is inserted penetrating vertically.
- the rotor is A plurality of separation disks stacked in the separation chamber at intervals in the vertical direction; A lower holder for holding the plurality of separation disks from below, The lower holder is not provided with a through hole penetrating in the vertical direction of the rotor other than the insertion hole through which the spindle is inserted, On the upper surface side of the lower partition member, A first partition wall erected over the entire circumference between the inner wall surface of the case and the outer peripheral edge of the lower holder; A drain hole that is disposed below at least a part of the entire circumference of the first partition wall and penetrates the lower partition wall member vertically is provided.
- the present invention by eliminating the communication hole provided on the center side of the lower holder in the rotor, it is possible to prevent the gas to be processed from leaking from the inside of the inner peripheral edge of the lower holder to the lower side and to be generated at a high temperature. Even when oil smoke is sucked in, large-scale mist that does not exist at low temperatures is not sucked in, and a reduction in separation efficiency can be avoided.
- Ribs are provided at predetermined intervals on the outer peripheral side of the first partition wall of the lower partition member.
- a lower case that covers the lower surface side of the lower partition member and partitions an injection chamber below the lower partition member;
- a nozzle that protrudes from the outer peripheral surface of the spindle in the drive chamber, injects drive oil in the circumferential direction, and rotates the spindle and the rotor;
- a cylindrical second partition wall portion is provided to hang downward on the outer peripheral side of the rotation trajectory of the nozzle,
- a plurality of at least one of a convex part and a concave part extending vertically is formed on the inner peripheral surface of the second partition wall part.
- the second partition wall is It may be provided in the shape of a polygonal cylinder that hangs downward on the outer peripheral side from the rotation locus of the nozzle, and at least one of a convex part and a concave part extending vertically is formed on the inner peripheral surface. May be.
- the cylindrical second partition wall portion is provided on the lower surface side of the lower partition wall member so as to hang downward from the outer peripheral side of the nozzle rotation trajectory, the scattering of the oil injected from the nozzle is limited. In addition, it is possible to prevent oil drainage of the drain hole that drains oil from the separation chamber into the lower case. In addition, since at least one of a convex portion and a concave portion extending vertically is formed on the inner peripheral surface of the second partition wall portion, the inner surface of the second partition wall portion rotates while rotating with the spindle. The oil sprayed on the peripheral surface can be prevented from rotating in the horizontal direction by centrifugal force, and can be easily suspended downward.
- the second partition wall portion may be provided in a polygonal cylinder shape, and further, at least one of a convex portion and a concave portion extending vertically may be formed on the inner peripheral surface thereof, Also in these forms, the oil sprayed on the inner peripheral surface of the second partition wall portion can be prevented from rotating in the horizontal direction due to centrifugal force, and can be easily suspended downward as described above.
- the aforementioned oil separator Provided in the lower case, further comprising a communicating tube portion that communicates from the injection chamber to the crankcase of the engine; In the inside of the communication tube portion, A vent for promoting the discharge of the oil is provided on the outer peripheral side of the second partition wall.
- a cylindrical partition wall protruding upward from the outer peripheral edge of the lower holder; A flange projecting radially outward from the partition wall; and The flange is disposed with a gap between the inner peripheral surface of the case, The first partition is disposed between an inner peripheral surface of the case and the partition wall; An oil processing chamber is formed between the flange and the lower partition member, The oil treatment chamber communicates with the separation chamber through the gap between the flange and the inner peripheral surface of the case; The drain hole penetrates the lower partition member at a site in the oil processing chamber.
- the drain hole of the lower partition member is expanded from below the first partition part toward the through hole.
- the separated oil can be more effectively discharged to the lower part of the lower partition member through the drain hole.
- the lower partition member is provided with a guide for preventing oil from rising from below around the through hole.
- the oil sprayed on the inner peripheral surface of the oil guard while turning with the rotation of the spindle can be prevented from going up the inner peripheral surface.
- the lower partition member is provided with a wall portion between the guide and the drain hole for preventing oil that has passed over the guide from moving to the outer peripheral side of the lower partition member.
- the lower partition member is provided with a hole for discharging the oil downward between the guide and the wall portion.
- the oil over the guide can be discharged to the lower flow path side.
- the wall portion is provided vertically through the front and back of the lower partition wall member.
- oil can be continuously discharged from the separation chamber, oil can be prevented from being accumulated by avoiding oil accumulation in the separation chamber, and negative pressure can be prevented from being generated inside the case.
- the oil discharge performance can be improved.
- FIG. 5 is a cross-sectional view showing a surface along VV shown in FIG. 3 as viewed in the direction of the arrow.
- FIG. 4 is a cross-sectional view showing a surface along VI-VI shown in FIG. 3 as viewed in the direction of the arrow. It is an enlarged view of the upper side of FIG. It is an enlarged view of the lower side of FIG.
- FIG. 7 is an enlarged view of the middle part of FIG. 6.
- FIG. 5 is an enlarged perspective view seen from the front side, the upper side, and the right side in a state where the oil separator is cut along the VV cross section shown in FIG. 3.
- FIG. 5 is a perspective view showing the oil separator as viewed from the right side, the lower side, and the rear side along the VI-VI cross section shown in FIG. 3.
- FIG. 5 is a perspective view showing the oil separator as viewed from the right side, the lower side, and the rear side along the VI-VI cross section shown in FIG. 3.
- FIG. 5 is a perspective view showing the oil separator as viewed from the right side, the lower side, and the rear side along the VI-VI cross section shown in FIG. 3. It is the expansion perspective view which looked and showed the lower partition member from the upper side.
- FIG. 4 is an enlarged cross-sectional view showing a first partition wall portion of a lower partition wall member as viewed from the right side in a state where the oil separator is cut along the VI-VI cross section shown in FIG. 3. It is a figure which uses for description of the flow of the oil in the inner wall surface of a case, and is the perspective view which showed the upper case of the oil separator which concerns on this invention seeing from the right side and the lower side. It is a figure which uses for description of the flow of the oil in the inner wall face of a case, and is the perspective view which showed the upper case of the conventional oil separator seeing from the right side and the lower side.
- FIG. 5 is a cross-sectional view showing a lower partition wall member according to another embodiment in a cross section along a VI-VI cross section shown in FIG. 3.
- FIG. 5 is an enlarged cross-sectional view showing a lower side of an oil separator according to another embodiment in a cross section along a VI-VI cross section shown in FIG. 3.
- a closed crankcase ventilation system 1 (hereinafter referred to as a ventilation system 1) shown in FIG. 1 is an example to which the present invention is applied.
- the ventilation system 1 includes an oil separator 2, a breather pipe 3, a gas outlet pipe 5, and an oil supply pipe 10.
- the oil separator 2 is attached to the side surface of the engine 4.
- the gas outlet pipe 5 is connected to the engine 4 and the oil separator 2, and blow-by gas discharged from the crankcase of the engine 4 is supplied to the oil separator 2 through the gas outlet pipe 5.
- the blow-by gas supplied from the crankcase of the engine 4 to the oil separator 2 is a processing target gas, and this blow-by gas contains mist-like oil.
- the oil separator 2 processes the supplied blow-by gas and separates mist-like oil from the blow-by gas.
- the breather pipe 3 is connected between the upper part of the oil separator 2 and the intake side flow path 6 of the engine 4, and the treated blow-by gas discharged from the oil separator 2 is reduced to the intake side flow path 6 through the breather pipe 3.
- the Specifically, the blowby gas after the treatment is reduced to a portion connecting the air filter 7 and the turbocharger 8 in the intake side flow path 6.
- the reduced blow-by gas is mixed with fresh air from the air filter 7 and compressed by the turbocharger 8. Thereafter, the blow-by gas is cooled by the charge cooler 9 and supplied to the engine 4.
- Oil supply pipe 10 is connected between the lower part of oil separator 2 and engine 4, and oil sent from engine 4 is supplied to oil separator 2 through oil supply pipe 10.
- the flow of oil (the former of driving oil and separating oil) supplied to the oil separator 2 is used for the power of the oil separator 2, and the oil separator 2 (particularly, the rotor unit 50 described later) is operated by the power. . Since the oil supplied to the oil separator 2 is part of the lubricating oil used in the engine 4, the temperature of the oil is about 80 to 110 ° C.
- mist oil is separated from the blowby gas by the oil separator 2.
- the separated mist oil is mixed with oil supplied to the oil separator 2 through the oil supply pipe 10 inside the oil separator 2.
- the mixed oil is returned to the engine 4.
- the oil separator 2 includes a housing 20, a lower partition member 31, a middle partition member 32, an upper partition member 33, a rotor unit 50, and a PCV valve 90.
- the housing 20 has a lower case 21, a middle case 22, and an upper case 23, and the lower case 21, the middle case 22, and the upper case 23 are combined with each other to assemble the housing 20, and an internal space is formed inside the housing 20. Is formed.
- the lower partition member 31, the middle partition member 32, and the upper partition member 33 are assembled to the housing 20, and the internal space of the housing 20 is partitioned by the lower partition member 31, the middle partition member 32, and the upper partition member 33.
- the rotor unit 50, the PCV valve 90, and the like are assembled to the housing 20 while being accommodated in the internal space of the housing 20.
- the axial direction indicates a direction parallel to the rotation axis of the rotor unit 50
- the circumferential direction indicates a circumferential direction around the rotation axis of the rotor unit 50, and the radial direction. Indicates a direction perpendicular to the rotation axis of the rotor unit 50.
- the rotation shaft of the rotor unit 50 extends in the vertical direction (specifically, the vertical direction).
- the housing 20 and its inner space will be described, and the inner space of the housing 20 by the lower partition member 31, the middle partition member 32, and the upper partition member 33 will be described.
- the middle case 22 is a portion that defines a central portion of the internal space of the housing 20.
- the middle case 22 is provided in a cylindrical shape, and the upper and lower surfaces of the middle case 22 are open.
- a partition wall portion 22a is provided in an upper portion inside the middle case 22, and the hollow of the middle case 22 is partitioned by the partition wall portion 22a into a space above and below the partition wall portion 22a.
- An inlet hole 22 b is formed on the outer peripheral surface of the middle case 22. Since the position of the inlet hole 22b is the upper part of the middle case 22 and below the partition wall 22a, the inlet hole 22b communicates with the hollow below the partition wall 22a.
- One end of a suction pipe 24 is connected to the inlet hole 22b.
- the other end of the suction pipe 24 is connected to the gas outlet pipe 5 (see FIGS. 1 and 3). Accordingly, the blow-by gas supplied from the engine 4 to the oil separator 2 passes through the suction pipe 24 and the inlet hole 22b, and is a portion below the partition wall portion 22a in the internal space of the housing 20 (specifically, described later) It is introduced into the introduction path 41).
- a middle partition member 32 provided in a disk shape at a position below the partition wall 22a.
- the peripheral part of the middle partition member 32 is joined to the inner peripheral surface of the middle case 22, and the hollow of the middle case 22 (the hollow below the partition part 22 a) is vertically divided by the middle partition member 32.
- a cylindrical fitting portion 32b projects downward from the center of the lower surface of the middle partition wall member 32.
- the hollow (supply hole 32a) of the fitting part 32b opens at the upper surface of the middle partition member 32 and also opens at the lower end of the fitting part 32b.
- the opening at the lower end of the fitting portion 32b is provided with a support portion 32d that extends radially from the center of the opening and is connected to the inner peripheral surface of the fitting portion 32b.
- a recess 32e is formed on the lower surface of the center of the support portion 32d. Since the support part 32d is provided radially, the hollow of the fitting part 32b is not blocked by the support part 32d.
- the support portion 32d supports the upper end of a spindle shaft 51 described later.
- the rotor 60 of the rotor unit 50 is not shown in order to make the internal structure of the housing 20 easier to see.
- FIG. 13 in order to make the internal structure of the housing 20 easier to see, the illustration of the rotor 60 and the middle partition member 32 of the rotor unit 50 is omitted.
- ribs (separation parts) 22c are provided on the lower surface of the partition wall 22a so as to protrude, and the upper surface of the middle partition member 32 is in close contact with the rib 22c.
- a contact portion between the upper surface of 32 and the rib 22c is in an airtight state.
- the rib 22c is formed in a U-shape when viewed from below (in FIG.
- the space between the middle partition wall member 32 and the partition wall portion 22a is a space 42 that surrounds the upper opening of the fitting portion 32b and the space 41 on the inlet hole 22b side (hereinafter referred to as the introduction path 41) and the introduction path 41 by the rib 22c. (Hereinafter referred to as the first chamber 42).
- the blow-by gas introduced into the inside of the housing 20 through the inlet hole 22b is sent to the lower side of the middle partition member 32 through the inside of the introduction path 41 and the fitting portion 32b.
- the introduction path 41 is a blow-by gas path before being introduced into the rotor unit 50
- the first chamber 42 is a blow-by gas path after being discharged from the rotor unit 50.
- the rotor unit 50 separates the mist-like oil from the blow-by gas, and the mist-like oil is removed from the blow-by gas discharged from the rotor unit 50.
- introduction path 41 and the first chamber 42 as described above can be provided above the rotor unit 50 .
- the space between the partition wall portion 22a and the middle partition wall member 32 is divided by the ribs 22c. Since the introduction path 41 is above the rotor unit 50, both the introduction path 41 and the inlet hole 22 b can be provided in the upper portion of the housing 20.
- a communication hole 22d is formed in the partition wall 22a (see in particular FIG. 13), and the communication hole 22d penetrates the partition wall 22a up and down.
- the position of the communication hole 22d is outside the rib 22c, and the hollow above the partition wall 22a and the first chamber 42 communicate with each other through the communication hole 22d.
- the communication hole 22d is a processed blow-by gas flow path from which mist-like oil has been removed.
- the upper side of the introduction path 41 is blocked by the partition wall 22a, and the hollow above the partition wall 22a and the introduction path 41 are partitioned by the partition wall 22a.
- a plurality of communication holes 32 c are formed at the peripheral edge of the middle partition member 32, and these communication holes 32 c penetrate the middle partition member 32 vertically. These communication holes 32c are arranged at equal intervals along the circumferential direction. The position of the communication hole 32c is outside the rib 22c, and the hollow under the middle partition member 32 and the first chamber 42 communicate with each other through the communication hole 22d.
- the communication hole 22d is a processed blow-by gas flow path from which mist-like oil has been removed.
- the upper partition member 33 is attached to the upper end of the middle case 22 in an airtight state, and the upper opening of the middle case 22 is closed by the upper partition member 33.
- the upper partition wall member 33 is spaced upward from the partition wall portion 22a, and a hollow 45 (hereinafter referred to as the second chamber 45) is formed between the upper partition wall member 33 and the partition wall portion 22a.
- a communication hole (valve hole) 33 a is formed at the center of the upper partition member 33, and the communication hole 33 a penetrates the upper partition member 33 vertically.
- the communication hole 33a is a processed blow-by gas flow path from which mist-like oil has been removed.
- the inner wall surface 22 f of the middle case 22 is disposed adjacently along the inner circumferential direction, and is formed with a plurality of protrusions that extend in the vertical direction.
- a portion 22g is provided.
- channel 22h can be provided between these adjacent convex parts 22g and 22g.
- channel 22h collects the oil isolate
- a guide portion 22i that is formed on the inner wall surface 22f of the middle case 22 so as to extend in the vertical direction and guides the oil separated by the rotation of the rotor 60 to the lower side of the internal space in which the separation chamber 43 is accommodated. Is provided.
- the guide portion 22i is provided by providing the plurality of adjacent convex portions 22g that form the vertical groove 22h on the inner wall surface 22f of the middle case 22 and the guide portion 22i. Since the oil after the separation actively hangs down along the inner wall surface 22f, the drainage of the oil from the inner space in which the separation chamber 43 is accommodated is promoted, and a plurality of oils formed on the inner wall surface 22f of the middle case 22 are promoted. The amount of oil collected in the groove 22h between the convex portions 22g and 22g can be reduced, and oil film formation on the inner wall surface 22f can be effectively prevented. Further, even when a large amount of oil temporarily flows into the internal space in which the separation chamber 43 is accommodated, the oil is continuously dripped (flowed down) by the guide portion 22i and effectively discharged. be able to.
- the guide portion 22i as the second groove formed on the inner wall surface 22f is formed deeper than the groove 22h, which is the first groove formed by a plurality of convex portions 22g formed on the inner wall surface 22f.
- the guide part 22i more oil can be drooped than the groove
- the plurality of convex portions 22g are formed at portions other than the lower end portion (the oil processing chamber 43b described below formed below the separation chamber 43) in the vertical direction of the inner wall surface 22f.
- the influence of the swirling flow E due to the rotation of the rotor 60 is less than that of other portions of the inner wall surface 22f, so that the oil is likely to drop downward. Therefore, the formation process of these several convex parts 22g can be simplified by forming the several convex parts 22g in the site
- the upper case 23 is a part that defines the upper part of the internal space of the housing 20.
- the upper case 23 is constituted by a dome-shaped member whose lower surface is opened.
- the upper case 23 covers the upper partition member 33 from above the upper partition member 33, and the edge portion of the lower opening of the upper case 23 is attached to the peripheral portion of the upper partition member 33 in an airtight state.
- the portion is sandwiched between the edge portion of the lower opening of the upper case 23 and the upper end of the middle case 22.
- the edge portion of the lower opening of the upper case 23 is joined to the peripheral edge of the upper partition member 33 by welding, welding, bolting, or the like.
- a hollow 46 (hereinafter referred to as a third chamber 46) is formed inside the upper case 23.
- the third chamber 46 and the second chamber 45 are partitioned by the upper partition member 33, and the communication hole 33 a communicates from the second chamber 45 to the third chamber 46.
- a cylindrical gas discharge portion 23a is provided so as to protrude outward in the radial direction.
- This gas discharge part 23a is connected to the breather pipe 3, and the processed blow-by gas from which the mist-like oil has been removed is discharged from the third chamber 46 to the breather pipe 3 through the gas discharge part 23a.
- the lower case 21 is a portion that defines a lower portion of the inner space of the housing 20.
- the lower case 21 is composed of a bottomed box-like member having an open upper surface.
- the upper end of the lower case 21 is fitted into the lower end of the middle case 22, and the lower case 21 and the middle case 22 are fixed by bolts 25 (see FIGS. 2 and 3).
- the ring-shaped seal 34 and the lower partition member 31 are fitted into the lower end portion of the middle case 22, and the peripheral portion of the lower partition member 31 and the seal 34 are between the upper end portion of the lower case 21 and the lower end portion of the middle case 22. It is sandwiched between. This seal 34 improves the airtightness.
- the lower partition wall member 31 is spaced downward from the middle partition wall member 32, and a separation chamber 43 is formed between the middle partition wall member 32 and the lower partition wall member 31.
- the separation chamber 43 is a hollow part in the middle case 22.
- the lower partition wall member 31 is provided in a disk shape.
- a through hole 31 a is formed at the center of the lower partition wall member 31.
- the lower partition wall member 31 partitions a hollow 44 (hereinafter referred to as an injection chamber 44) and a separation chamber 43 of the lower case 21.
- the lower case 21 covers the lower surface side of the lower partition member 31 and partitions the injection chamber 44 below the lower partition member 31.
- a communication cylinder portion 21 a is provided on the front (front) side of the lower case 21 so as to face downward.
- the communicating cylinder portion 21a is a cylindrical member that serves as an outlet for oil injected by a nozzle 53 described later.
- the internal space of the communication tube portion 21 a communicates with the internal space of the lower case 21.
- the oil supply pipe 10 is connected to the tip of the communication cylinder 21a, and the tip of the communication cylinder 21a is coupled to the side surface of the engine 4 via the oil supply pipe 10 (see FIG. 3). For this reason, the internal space of the communication cylinder part 21 a communicates with the internal space of the engine 4.
- the communication cylinder part 21a functions as a flow path for blow-by gas.
- the bottom surface of the lower case 21 is inclined downward toward the communication tube portion 21a.
- a cylindrical oil guide pipe 21 b extending upward from the bottom surface of the lower case 21 is provided inside the lower case 21.
- a joint portion 21 c is provided at the lower end of the oil guide pipe 21 b, and this joint portion 21 c faces the bottom surface of the lower case 21.
- the joint portion 21c is connected to the oil supply pipe 10, and the oil supplied from the engine 4 to the oil separator 2 flows upward inside the oil guide pipe 21b as indicated by an arrow A in FIG.
- Part of the oil (driving oil) that has flowed upward in the oil guide pipe 21 b flows to the nozzle 53 via the inside of a spindle shaft 51 and a spindle 52 described later.
- the nozzle 53 protrudes from the outer peripheral surface of the spindle 52 in the injection chamber 44, and injects driving oil in the circumferential direction to rotate the spindle 52 and the rotor 60.
- a strainer 35 is provided in the joint portion 21 c, and oil is filtered by the strainer 35.
- the strainer 35 includes a mesh filter 35a, a spring 35b, and a plug 35c.
- the strainer 35 is clogged by detecting a decrease in the rotational speed of the rotor 60 using a rotation sensor (a magnetic sensor 85 and a plurality of permanent magnets 86 described later). Can be detected and cleaned.
- the second partition wall portion provided on the lower surface of the lower partition wall member 31 has a second partition wall portion on the outer peripheral side of the oil guard 31g, which will be described later.
- a vent 21d is provided. This vent 21d is a drain hole 31c described later for discharging oil from the separation chamber 43 into the lower case 21 through a flow path 44a described later separated from the injection chamber 44 by an oil guard 31g in the lower case 21. And communicate.
- the oil guard 31g can restrict the scattering of the oil sprayed from the nozzle 53 and prevent the drain hole 31c from draining the oil from the separation chamber 43 into the lower case 21, and can pass through the drain hole 31c.
- the oil can be effectively discharged to the lower case 21 side below the lower partition wall member 31.
- ribs 31d are provided at predetermined intervals on the outer periphery of the first partition wall 31b, and a drain hole 31c is provided below the first partition wall 31b between the adjacent ribs 31d and 31d. Has been.
- a cylindrical oil guard 31g that hangs downward on the outer peripheral side with respect to the rotation trajectory of the nozzle 53, and reinforcement disposed at predetermined intervals along the outer periphery of the oil guard 31g. Part 31e.
- the oil guard 31g may be provided in a polygonal cylindrical shape or may be provided in a cylindrical shape.
- the inner surface 31f of the oil guard 31g is preferably provided with a plurality of at least one of a convex portion and a concave portion extending vertically.
- the oil guard 31g is cylindrical, it is essential to form at least one of the plurality of convex portions and concave portions.
- a flow path 44a separated from the injection chamber 44 by the oil guard 31g is formed on the outside of the oil guard 31g.
- the flow path 44a extends in the circumferential direction, and the lower side of the communication cylinder portion 21a in the circumferential direction of the flow path 44a opens to communicate with the vent 21d.
- a drain hole 31c is provided in the ceiling surface of the flow path 44a, and the flow path 44a communicates with the separation chamber 43 through the drain hole 31c. In this way, the separated oil flows from the separation chamber 43 into the flow path 44a in the lower case 21 through the drain hole 31c, hangs down the flow path 44a, passes through the vent 21d, and communicates with the communicating cylinder portion 21a. Discharged from.
- the middle case 22 is formed in the gap 43a on the outer periphery of the lower portion of the rotor 60 serving as an escape path for the ultra-high flow rate blow-by gas.
- the oil that should be discharged from the inner wall surface 22f is prevented from being swung by the swirling flow (wind) caused by the rotation of the rotor 60, and is prevented from stagnating on the inner wall surface 22f of the middle case 22.
- the downward oil and the opposite gas can pass each other without interfering with each other, so that continuous oil can be discharged from the separation chamber 43 having the rotor 60 to the lower case 21, Oil accumulation can be prevented by avoiding oil accumulation.
- the rib 31d can prevent the oil on the outer peripheral side of the first partition wall portion 31b on the lower partition wall member 31 from being swung around by the swirling flow (wind) generated by the rotation of the rotor 60, and the rib 31d.
- the oil on the outer peripheral side of the first partition wall 31b can easily flow into the drain hole 31c, and as a result, toward the flow path 44a formed in the lower case 21 below the lower partition wall member 31. It can be discharged efficiently.
- the reinforcing portion 31e can not only reinforce the strength of the lower partition wall member 31, but also can prevent the oil discharged from the drain hole 31c from moving in the outer peripheral direction, and promote downward drooping.
- the oil guard 31g is provided on the lower surface side of the lower partition member 31, the drain hole 31c that restricts the scattering of the oil injected from the nozzle 53 and discharges the oil from the separation chamber 43 into the lower case 21. Oil immersion can be prevented.
- the inner peripheral surface 31f of the oil guard 31g is formed with a plurality of at least one of a convex portion and a concave portion extending in the vertical direction, so that the inner peripheral surface of the oil guard 31g rotates while the spindle 52 rotates. The oil sprayed on 31f can be prevented from rotating in the horizontal direction by centrifugal force, and can be easily suspended downward. At this time, if the oil guard 31g is provided in a polygonal cylindrical shape, the formation of these convex portions and concave portions is not essential.
- the rotor unit 50 is a mechanism for separating mist-like oil from blow-by gas.
- the rotor unit 50 includes a spindle shaft 51, a spindle 52, a rotor 60, a plurality of nozzles 53, and the like.
- the spindle shaft 51 is a columnar member.
- the spindle shaft 51 extends in the vertical direction in the lower case 21 and the middle case 22 and is passed through the through hole 31 a of the lower partition wall member 31.
- the lower end portion of the spindle shaft 51 is connected to the oil guide pipe 21b.
- the upper end portion of the spindle shaft 51 is inserted into the recess 32e on the lower surface of the support portion 32d, and the upper end portion of the spindle shaft 51 is supported by the support portion 32d and the middle partition wall member 32.
- a first oil supply passage 51 b is formed along the center line of the spindle shaft 51.
- the lower end of the first oil supply path 51b opens at the lower end surface of the spindle shaft 51, and the first oil supply path 51b communicates with the oil guide pipe 21b.
- the upper part of the first oil supply path 51 b is branched into a plurality of radial outwards in the middle part of the spindle shaft 51, and the end of the first oil supply path 51 b is opened on the outer peripheral surface of the spindle shaft 51.
- the spindle 52 is a cylindrical member.
- a spindle shaft 51 is passed through the spindle 52, and the upper portion of the spindle shaft 51 protrudes upward from the upper end of the spindle 52, and the lower portion of the spindle shaft 51 protrudes downward from the lower end of the spindle 52.
- a clearance is formed between the outer peripheral surface of the spindle shaft 51 and the inner peripheral surface of the spindle 52, and the clearance is the second oil supply path 52a.
- the lower bearing 55 is sandwiched between the outer peripheral surface of the spindle shaft 51 and the inner peripheral surface of the spindle 52 at the upper end portion of the spindle 52, and the lower bearing 55 is sandwiched between the outer peripheral surface of the spindle shaft 51 and the spindle at the lower end portion of the spindle 52. 52 between the inner peripheral surface of 52.
- the oil that has flowed up in the oil guide pipe 21 b flows to the nozzle 53 described later via the spindle shaft 51 and the spindle 52 described later.
- a strainer 35 is provided in the joint portion 21 c, and oil is filtered by the strainer 35.
- the strainer 35 includes a mesh filter 35a provided in the joint portion 21c, and a spring 35b and a plug 35c for fixing the mesh filter 35a, and the engine oil is filtered by the mesh filter 35a. ing. Further, the strainer 35 can be removed by removing the plug 35c, and the mesh filter 35a can be cleaned.
- the rotation abnormality or the rotation speed of the rotor 60 is detected by using the magnetic sensor 85 and the plurality of permanent magnets 86 as the rotation sensors, thereby detecting the rotation abnormality of the rotor 60.
- the plurality of permanent magnets 86 are arranged on the outer peripheral surface of the upper holder 71 at equal intervals along the circumferential direction.
- the magnetic sensor 85 is mounted in a mounting hole 22 e formed in the upper part of the rear surface of the middle case 22.
- a rubber ring-shaped seal 87 is sandwiched between the inner surface of the mounting hole 22 e and the outer surface of the magnetic sensor 85.
- the magnetic sensor 85 is, for example, a Hall element. When the permanent magnet 86 approaches the magnetic sensor 85 during the rotation of the rotor 60 and the passage of the permanent magnet 86 is detected by the magnetic sensor 85, the magnetic sensor 85 outputs a pulse. Since the magnetic sensor 85 is exposed inside the middle case 22, the detection accuracy of the magnetic sensor 85 is high.
- a radial load of the spindle 52 is received by the spindle shaft 51 via the bearings 55 and 56, and the spindle 52 is supported by the spindle shaft 51 in a rotatable state.
- a nut 58 is screwed into the upper end portion of the spindle shaft 51, and the lower end portion of the spindle shaft 51 is inserted into a bearing 54 provided on the upper end surface of the oil guide pipe 21b.
- a washer 57, an upper bearing 56, a spindle 52, and a lower bearing 55 are sandwiched between the nut 58 and the bearing 54, and the thrust load of the spindle 52 is received by the bearing 54 and the nut 58.
- a slight gap is provided between the lower bearing 55 and the bearing 54, between the upper bearing 56 and the washer 57, or between the washer 57 and the nut 58 so that the spindle 52 and the bearings 55 and 56 can move slightly along the axial direction. Exists between. Specifically, when the rotor 60 is rotated, the spindle 52 and the bearings 55 and 56 are raised along the axial direction, and when the rotor 60 is stopped, the spindle 52 and the bearings 55 and 56 are lowered. Further, a slight gap exists between the inner peripheral surface of the spindle 52 and the upper bearing 56, and the oil in the oil supply path 52a flows out of the spindle 52 through the gap.
- the spindle 52 In a state where the spindle 52 is supported by the spindle shaft 51, the spindle 52 is passed through the through hole 31a of the lower partition wall member 31, and the spindle 52 extends upward from the through hole 31a and from the through hole 31a. It extends downward.
- a plurality of nozzles 53 project from the outer peripheral surface of the lower part of the spindle 52 (particularly, the part below the lower partition wall member 31), and these nozzles 53 are equally spaced along the circumferential direction (for example, 120 ° intervals). ). These nozzles 53 are disposed in the injection chamber 44 and are disposed inside the oil guard 31g. These nozzles 53 are for injecting oil and generating power for rotating the spindle 52 by the injection pressure of the oil.
- the nozzle 53 is provided in a cylindrical shape, the hollow of the nozzle 53 is opened at the proximal end of the nozzle 53, and the hollow of the nozzle 53 is closed at the distal end of the nozzle 53.
- the base end of the nozzle 53 is connected to the spindle 52 so as to pass from the outer peripheral surface to the inner peripheral surface of the spindle 52, and the hollow of the nozzle 53 communicates with the second oil supply path 52a.
- the nozzle 53 is attached at an angle of 45 degrees obliquely downward with respect to the axial direction of the spindle 52.
- An injection port 53 a is formed on the peripheral surface of the tip of the nozzle 53, and the injection port 53 a communicates with the hollow of the nozzle 53.
- the injection port 53 a is directed in the circumferential direction around the axis of the spindle 52.
- the rotor 60 is a part that separates oil mist from blow-by gas.
- the rotor 60 has a cylindrical appearance.
- the central portion of the rotor 60 is a space 62, the central side space 62 penetrates the rotor 60 in the vertical direction, and the upper and lower sides of the central side space 62 are open. .
- a spindle 52 is inserted into the center side space 62, and the spindle 52 and the rotor 60 are coupled to each other. Therefore, the rotor 60 rotates together with the spindle 52 by the oil injection pressure from the nozzle 53.
- the rotor 60 includes a separation disk group 61, an upper holder 71, a lower holder 72, and a disk holding portion 73.
- the separation disk group 61 includes a plurality of separation disks 63, and these separation disks 63 are stacked in the axial direction of the spindle 52.
- a plurality of convex portions are provided on the upper surface or lower surface of the separation disk 63 or on both surfaces thereof. The convex portion abuts on the adjacent separation disk 63, and a gap is formed between the stacked separation disks 63. As shown in FIG.
- the separation disk 63 will be described in detail.
- the separation disk 63 is a rotating body around the axis of the spindle 52. More specifically, the separation disk 63 is provided in a shape obtained by rotating an upside down V-shape separated radially outward from the axis of the spindle 52 around the axis. Therefore, a mounting opening 66 is formed in the center of the separation disk 63. As the separation discs 63 are stacked, a central space 62 including these mounting openings 66 is formed.
- the separation disk 63 includes an inner peripheral side portion 65 and an outer peripheral side portion 64 that is radially outward from the inner peripheral side portion 65.
- the inner peripheral side portion 65 is formed in a conical surface plate shape having a vertex below the center of the separation disk 63. Therefore, the inner peripheral side portion 65 is inclined upward toward the outer side in the radial direction.
- the outer peripheral side portion 64 is formed in a conical surface plate shape with the top of the center of the separation disk 63 as a vertex. Therefore, the outer peripheral side portion 64 is inclined downward toward the radially outer side.
- the inner peripheral edge of the outer peripheral part 64 is connected to the outer peripheral edge of the inner peripheral part 65, the outer peripheral part 64 continues from the outer peripheral edge of the inner peripheral part 65 to the outside, and the outer peripheral part 64 and the inner peripheral part 65 are integrated. Molded.
- the conical surface refers to the outer peripheral surface of the truncated cone.
- the outer peripheral side portion 64 bends downward from the outer peripheral edge of the inner peripheral side portion 65, and the inclination direction of the inner peripheral side portion 65 and the inclination direction of the outer peripheral side portion 64 are opposite to each other. . Since the separation disk 63 is bent between its inner and outer peripheral edges, the rigidity of the separation disk 63 is improved. Furthermore, since the corner (ridge) sandwiched between the inner peripheral portion 65 and the outer peripheral portion 64 is rounded, the rigidity of the separation disk 63 is improved. Therefore, even if the separation disk 63 is thin, the deformation of the separation disk 63 can be suppressed. If the separation disk 63 is thin, the number of separation disks 63 can be increased, and the oil separation efficiency is improved.
- the separation disk 63 Since the separation disk 63 is bent, the length from the inner periphery of the separation disk 63 to the outer periphery of the separation disk 63 along the surface of the separation disk 63 can be increased, and the surface area of the separation disk 63 is increased. be able to. Therefore, the oil separation efficiency is improved. Further, even if the number of stacked separation disks 63 is increased, it is possible to suppress an increase in the stacked height of the separation disks 63. Further, since the separation disk 63 is bent, the height of the separation disk 63 itself can be suppressed even when the inclination angles of the inner peripheral portion 65 and the outer peripheral portion 64 with respect to the radial direction are steep. If the inclination angles of the inner peripheral side portion 65 and the outer peripheral side portion 64 with respect to the radial direction are steep, the oil separation efficiency is high.
- the inclination angle of the inner peripheral side portion 65 with respect to the radial direction is 45 ° or less, and the inclination angle of the outer peripheral side portion 64 with respect to the radial direction is 45 ° or less. If the inclination angles of the inner peripheral side portion 65 and the outer peripheral side portion 64 are both 45 ° or less, the angle between the inner peripheral side portion 65 and the outer peripheral side portion 64 is a right angle or an obtuse angle. When the angle between the corners sandwiched between the inner peripheral side portion 65 and the outer peripheral side portion 64 is a right angle or an obtuse angle, it is possible to suppress an increase in the interval between the stacked separation disks 63. Therefore, more separation disks 63 can be stacked. If the inclination angle of the inner peripheral side portion 65 and the outer peripheral side portion 64 is 45 °, it is possible to achieve both prevention of an increase in the spacing between the separation disks 63 and reduction in separation efficiency.
- the rotor 60 is assembled by assembling the plurality of separation disks 63 as described above to the upper holder 71, the lower holder 72 and the disk holding portion 73.
- the rotor 60 is accommodated in the separation chamber 43.
- the height of the rotor 60 is low by devising the shape of the separation disk 63 as described above, the height of the separation chamber 43 can also be reduced. Furthermore, the distance from the lower partition member 31 to the middle partition member 32 can be shortened, and the lower partition member 31 can be disposed further upward. Therefore, the nozzle 53 (particularly the injection port 53a) can be arranged below the lower partition member 31 and the lowermost separation disk 63. Therefore, the oil sprayed from the nozzle 53 can be prevented from being sprayed toward the lower partition wall member 31.
- the vertical position of the inner peripheral edge of the separation disk 63 is close to the vertical position of the outer peripheral edge.
- the position of the inner peripheral edge of the separation disk 63 in the vertical direction is aligned with the position of the outer peripheral edge in the vertical direction.
- the lower partition member 31 is provided so that it may spread in the circumferential direction and radial direction. Therefore, the vertical length of the separation chamber 43 can be suppressed, and the housing 20 can be made compact.
- the nozzle 53 is disposed below the lower partition wall member 31, the nozzle 53 is disposed further above and the nozzle 53 is disposed in the vicinity of the lower partition wall member 31. Even if the nozzle 53 is disposed further upward, the lower partition wall member 31 is along the surface defined by the circumferential direction and the radial direction. Therefore, even if the nozzle 53 is disposed further upward, the nozzle 53 (particularly the injection port 53a). ) Can be prevented from being sprayed onto the lower partition wall member 31. Further, since the nozzle 53 is disposed in the vicinity of the lower partition wall member 31, the vertical length of the injection chamber 44 can be suppressed, and the housing 20 can be made compact.
- the disc holding portion 73 is inserted into the mounting opening 66 of the separation disc 63, and the separation disc 63 is attached to the disc holding portion 73.
- the spindle 52 is inserted into the disc holding portion 73, and the outer peripheral surface of the spindle 52 is in contact with the disc holding portion 73.
- the spindle 52 is attached to the disk holding portion 73 by a retaining ring and a washer (not shown).
- the disk holding portion 73 has a hub portion 73a and a plurality of spoke portions 73b.
- the hub portion 73a is provided in a ring shape, the spindle 52 is inserted into the hub portion 73a, and the spindle 52 is fixed to the hub portion 73a.
- the spoke portion 73b is provided in a plate shape extending radially outward from the hub portion 73a. These spoke portions 73b are inserted in the mounting openings 66 of the stacked separation discs 63 along the vertical direction. Moreover, since these spoke parts 73b are arranged at intervals along the circumferential direction of the edge of the mounting opening 66, a gap is formed between the adjacent spoke parts 73b. The spoke portion 73 b is fixed to the separation disk 63.
- the upper holder 71 holds a plurality of stacked separation disks 63 from above.
- the lower holder 72 holds these separation disks 63 from below. These separation disks 63 are sandwiched between the upper holder 71 and the lower holder 72, and the upper holder 71 and the lower holder 72 hold the separation disk 63.
- a plurality of engagement hooks 74 are provided so as to hang downward from the outer periphery of the upper holder 71, and the lower ends of the engagement hooks 74 are locked to the outer periphery of the lower holder 72.
- the upper holder 71 is provided in a shape obtained by rotating an upside down V-shape separated radially outward from the axis of the spindle 52 around the axis, like the separation disk 63. Therefore, the inner peripheral side portion of the upper holder 71 is inclined upward toward the radially outer side, and the outer peripheral side portion of the upper holder 71 is inclined downward toward the radially outer side. The same applies to the lower holder 72.
- an opening 71 a is formed at the center of the upper holder 71, and the opening 71 a is an opening on the upper side of the center side space 62.
- the inner peripheral edge of the upper holder 71 is connected to the upper end of the spoke part 73b, and the spoke part 73b and the upper holder 71 are integrally formed.
- the fitting portion 32 b of the middle partition member 32 is inserted into the opening 71 a of the upper holder 71.
- an opening 72a is formed at the center of the lower holder 72, and the opening 72a is the lower opening of the center side space 62.
- the spindle 52 is inserted into the opening 72 a of the lower holder 72, and the peripheral part of the opening 72 a is sandwiched between the outer peripheral surface of the lower part of the spindle 52 and the lower end of the disk holding part 73. Then, the spindle 52 is fixed to the lower holder 72 by a retaining ring. Further, the outer peripheral surface of the lower part of the spindle 52 is joined to the edge of the opening 72 a of the lower holder 72, and the lower opening of the center side space 62 is closed by the spindle 52.
- the lower holder 72 is not provided with a through-hole penetrating in the vertical direction other than the opening 72a as an insertion hole through which the spindle 52 is inserted.
- a cylindrical (in this case, cylindrical) partition wall 72c protruding upward is provided on the outer peripheral edge of the lower holder 72.
- a flange 72d is provided at the upper end of the partition wall 72c.
- the outer peripheral edge of the flange 72d is separated from the inner peripheral surface 22f of the middle case 22, and a gap 43a is formed between the outer peripheral edge of the flange 72d and the inner peripheral surface 22f of the middle case 22.
- the first partition wall portion 31b of the lower partition wall member 31 is disposed between the inner peripheral surface 22f of the middle case 22 and the partition wall 72c.
- the flange 72d is spaced upward from the upper surface of the lower partition member 31, and an oil processing chamber 43b is formed under the flange 72d.
- the oil processing chamber 43b and the separation chamber 43 communicate with each other through a gap 43a.
- the drain hole 31c penetrates the lower partition wall member 31 up and down at a site in the oil processing chamber 43b.
- the nozzle 53 is positioned below the inner peripheral edge of the inner peripheral side portion 65 of the lowermost separation disk 63. Further, the nozzle 53 is positioned below the outer peripheral edge of the outer peripheral side portion 64 of the lowermost separation disk 63. Therefore, the outer side in the radial direction than the nozzle 53 is not surrounded by the separation disk 63. If it does so, the lower partition member 31 can be arrange
- the separation disk 63 is located radially inward below the communication hole 32c of the middle partition wall member 32. Straddles radially outward. Therefore, the communication hole 32 c is arranged on the radially inner side with respect to the outer peripheral edge of the separation disk 63.
- the PCV valve 90 appropriately adjusts the intake pressure of the engine 4 (FIG. 1) and the pressure on the crankcase side by adjusting the flow rate of the blow-by gas to be circulated. Specifically, the PCV valve 90 adjusts the flow rate of blow-by gas by adjusting the degree of opening of the communication hole 33 a of the upper partition wall member 33.
- the PCV valve 90 is installed in the second chamber 45.
- the PCV valve 90 includes a diaphragm 91, an upper spring 92, and a lower spring 93.
- the diaphragm 91 is a disc-shaped valve body, and is manufactured by molding rubber and resin.
- the diaphragm 91 is accommodated in the second chamber 45 and is disposed under the communication hole 33 a of the upper partition wall member 33.
- the outer edge portion of the diaphragm 91 is joined to the upper surface of the partition wall portion 22a.
- the communication hole 22 d of the partition wall portion 22 a is disposed outside the outer edge portion of the diaphragm 91.
- the upper spring 92 and the lower spring 93 are elastic members for supporting the central portion of the diaphragm 91 in a state where it can move in the vertical direction.
- the upper spring 92 is sandwiched between the diaphragm 91 and the upper partition member 33 above the central portion of the diaphragm 91.
- the lower spring 93 is sandwiched between the diaphragm 91 and the partition wall portion 22a below the central portion of the diaphragm 91.
- the diaphragm 91 is sandwiched between the upper spring 92 and the lower spring 93 and is supported in a movable state.
- the direction in which the driving oil is ejected from the ejection port 53 a is a circumferential direction around the axis of the spindle 52. More specifically, when the drive oil injection direction is a direction perpendicular to the axis of the spindle 52 and the axis of the spindle 52 is along the vertical direction, the drive oil injection direction is the horizontal direction. It is.
- the spindle 52 and the rotor 60 are rotated about the axis of the spindle 52 by the injection pressure of the driving oil.
- the direction of rotation of the spindle 52 and the rotor 60 is opposite to the direction of injection of the driving oil.
- the rotor 60 may precess while the rotor 60 is rotating.
- the height of the rotor 60 is small, and the center of gravity of the rotor 60 is close to the fulcrum of precession. Therefore, the fluctuation width of the axis of the rotor 60 is small, and the occurrence of precession of the rotor 60 can be reduced. Therefore, the rotational speed of the rotor 60 can be improved.
- the air resistance of the rotor 60 is small because the height of the rotor 60 is small by devising the shape of the separation disk 63. Therefore, the rotation speed of the rotor 60 can be improved.
- the driving oil injected from the injection port 53a is sprayed onto the oil guard 31g. Therefore, it is possible to prevent the injected drive oil from entering the drain hole 31c due to the momentum.
- the driving oil sprayed on the oil guard 31g flows down along the inner peripheral surface 31f of the oil guard 31g. Since the temperature of the driving oil is as high as 80 to 110 ° C., the driving oil heats the oil separator 2 from the lower case 21 side. Thereby, even if it is used in a cold district, it is possible to suppress the occurrence of malfunction of the oil separator 2 due to freezing or the like.
- the driving oil that has flowed down is returned to the engine 4 from the bottom of the lower case 21 through the communication tube portion 21a.
- blow-by gas containing mist-like oil is supplied from the engine 4 through the gas outlet pipe 5 to the oil separator 2.
- the blow-by gas is introduced into the introduction path 41 through the suction pipe 24 and the inlet hole 22b.
- the blow-by gas flows into the inside of the disk holding portion 73 (more specifically, inside the spoke portion 73 b) from the introduction path 41 through the hollow of the fitting portion 32 b and the opening 71 a of the upper holder 71.
- the blow-by gas that has flowed into the inside of the disk holding portion 73 flows in the gap between the spoke portions 73b outward in the radial direction, and flows into the gap between the separation disks 63.
- the blow-by gas that has flowed into the gap between the separation disks 63 flows radially outward.
- the blow-by gas flowing into the gap between the separation disks 63 is subjected to pressure from the upstream side (gas supply pressure from the engine 4 to the oil separator 2), and centrifugation by rotation of the rotor 60. Force also acts. That is, the suction pressure for sucking the blow-by gas in the introduction passage 41 to the inside of the disk holding portion 73 is generated by the centrifugal force due to the rotation of the rotor 60, and the flow velocity of the blow-by gas is increased.
- a part of the oil (separation oil) in the second oil supply path 52 a passes through a slight gap between the inner peripheral surface of the spindle 52 and the upper bearing 56 (more specifically, inside the disk holding portion 73. Flows out to the inside of the spoke part 73b. Since the temperature of the separation oil is as high as 80 to 110 ° C., the rotor 60 and its vicinity are heated from the inside. Thereby, even if it is used in a cold district, it is possible to suppress the occurrence of malfunction of the oil separator 2 due to freezing or the like.
- An oil film is mainly formed on the upper surface of the inner peripheral side portion 65 and the lower surface of the outer peripheral side portion 64 of the separation disk 63. Note that the oil film on the surface of the separation disk 63 includes not only the separation oil flowing out from the second oil supply path 52a to the inside of the disk holding portion 73 but also oil separated from blow-by gas as described later.
- the separation disk 63 When the blow-by gas flows through the gap between the separation disks 63, the oily mist contained in the blow-by gas is absorbed by the oil film on the surface of the separation disk 63. As a result, the mist-like oil in the blow-by gas is captured by the separation disk 63, and the mist-like oil is separated from the blow-by gas. As described above, since the separation disk 63 has a large surface area and a large number of separation disks 63, the mist-like oil is easily captured by the separation disk 63, and the oil separation efficiency is high.
- the separation oil flowing out from the second oil supply path 52a is a component of the oil film on the surface of the separation disk 63, so that the surface of the separation disk 63 is sufficient. An oil film is formed. And since the mist-like oil in blow-by gas is absorbed by such an oil film, the separation efficiency of mist-like oil is high.
- the physical properties (wetting properties) of the separating oil flowing out from the second oil supply passage 52a are the same as the physical properties (wetting properties) of the mist-like oil in blow-by gas. Therefore, the affinity between the separating oil flowing out from the second oil supply passage 52a and the mist-like oil in the blow-by gas is high, and the affinity between the mist-like oil in the blow-by gas and the oil film on the surface of the separation disk 63 is also high. high. Therefore, the mist-like oil in the blow-by gas is easily absorbed by the oil film on the surface of the separation disk 63, and the mist-like oil is separated efficiently.
- the blowby gas after the treatment from which the oil mist has been removed is discharged from the outer periphery of the gap between the separation disks 63 to the outside, and then rises in the separation chamber 43. Then, the blowby gas after the process that has risen flows from the separation chamber 43 through the communication hole 32c into the first chamber 42, and further flows from the first chamber 42 through the communication hole 22d into the second chamber 45. The blow-by gas is discharged from the second chamber 45 to the breather pipe 3 through the communication hole 33a of the upper partition member 33, the third chamber 46, and the gas discharge part 23a. Thereby, the blow-by gas is circulated to the engine 4.
- blow-by gas flows into the first chamber 42 from the communication hole 32 c
- the flow rate of the blow-by gas is stalled in the first chamber 42.
- the flow rate of blow-by gas stalls in the second chamber 45 and the third chamber 46.
- the separation chamber 43 and the oil processing chamber 43b are communicated only by the gap 43a, and the pressure of blow-by gas discharged from the gap between the separation disks 63 acts on the gap 43a. Therefore, blow-by gas in the crankcase of the engine 4 can be prevented from flowing into the separation chamber 43 through the communication cylinder portion 21a, the injection chamber 44, the drain hole 31c, the oil processing chamber 43b, and the gap 43a.
- the flow rate of the blow-by gas is adjusted. That is, when the intake pressure (negative pressure) of the engine 4 is excessively large, the central portion of the diaphragm 91 moves upward, the degree of opening of the communication hole 33a is reduced, and the flow rate of blow-by gas is reduced. On the other hand, when the pressure on the crankcase side is high, the central portion of the diaphragm 91 moves downward, the opening of the communication hole 33a becomes larger, and the flow rate of blow-by gas increases. Thereby, the flow rate of blow-by gas is appropriately adjusted by the diaphragm 91. In addition, the pressure of the engine 4, particularly the crankcase, is also adjusted appropriately.
- the oil containing the separation oil attached to the surface of the separation disk 63 flows to the outer peripheral side along the surface of the separation disk 63 by centrifugal force.
- the oil at the outer edge of the upper surface of the inner peripheral side portion 65 jumps to the lower surface of the outer peripheral side portion 64 of the upper adjacent separation disk 63 by centrifugal force.
- the separation disk 63 oil adhering to the surface of the separation disk 63 is discharged to the outside from the outer periphery of the gap between the separation disks 63 by centrifugal force. More specifically, since the separation disk 63 rotates at a high speed, when viewed from above, the released oil has a combined force obtained by synthesizing a radially outward centrifugal force and a tangential rotational inertia force. Fly in the direction. Further, since the outer peripheral side portion 64 of the separation disk 63 is inclined downward outward in the radial direction, when viewed from the side, the released oil flies radially outward and obliquely downward. Therefore, it is possible to suppress the released oil from being dispersed in the rising blow-by gas and becoming mist. Therefore, the blow-by gas discharged from the oil separator 2 contains almost no oil.
- the flying oil adheres to the inner peripheral surface of the middle case 22. Then, the oil is collected in the groove 22h between the plurality of convex portions 22g, 22g formed on the inner wall surface 22f, and is not affected by the swirl flow E due to the rotation of the rotor 60 by the capillary phenomenon, so that the oil enters the groove 22h.
- the liquid drops downward. Therefore, an oil film can be prevented from being formed on the inner wall surface 22f of the middle case 22 in which the separation chamber 43 is accommodated by the separated oil, and the oil can be prevented from being taken away by the swirling flow E.
- the guide portion 22i deeper than the groove 22h provided in the inner wall surface 22f of the middle case 22 can suspend more oil than the groove 22h, and the oil from the internal space in which the separation chamber 43 is accommodated can be dropped. Emission can be promoted. Therefore, the amount of oil collected in the groove 22h formed on the inner wall surface 22f of the middle case 22 can be actively reduced, and oil film formation on the inner wall surface 22f can be more effectively prevented.
- the separated oil actively hangs down along the inner wall surface 22f by the guide portion 22i, the oil discharge from the internal space in which the separation chamber 43 is accommodated is promoted and collected in the groove 22h. The amount of oil can be reduced, and oil film formation on the inner wall surface 22f can be effectively prevented.
- the oil dropped (dropped) on the inner wall surface 22f of the middle case 22 by the first partition wall portion 31b of the lower partition wall member 31 serves as an escape path for the ultra-high flow rate blow-by gas. It is possible to prevent the swirling flow E caused by the rotation of 60 from being accompanied by the swirling flow E, and to stay on the inner wall surface 22f of the middle case 22. As a result, the downward oil and the opposite gas can pass each other without interfering with each other, so that continuous oil can be discharged from the separation chamber 43 having the rotor 60 to the lower case 21, Oil accumulation can be prevented by avoiding oil accumulation.
- the rib 31d can prevent the oil on the outer peripheral side of the first partition wall portion 31b on the lower partition wall member 31 from being driven by the swirling flow E generated by the rotation of the rotor 60, and the rib 31d
- the oil on the outer peripheral side of the first partition wall portion 31b can be easily flown into the drain hole 31c.
- the oil efficiently flows to the flow path 44a formed in the lower case 21 below the lower partition wall member 31.
- the reinforcing portion 31e not only reinforces the strength of the lower partition wall member 31, but also prohibits movement of the oil discharged from the drain hole 31c in the outer peripheral direction, and promotes the oil to hang downward.
- the oil guard 31g on the lower surface side of the lower partition wall member 31 restricts the scattering of the oil sprayed from the nozzle 53 and prevents the drain hole 31c from draining oil from the separation chamber 43 into the lower case 21. it can.
- the oil guard 31g is formed in a polygonal shape or a cylindrical shape, at least one of a convex portion and a concave portion extending vertically is provided on the inner peripheral surface 31f, so that the spindle 52 rotates.
- the oil sprayed on the inner peripheral surface 31f of the oil guard 31g while turning can be prevented from rotating in the horizontal direction due to centrifugal force, and can be easily suspended downward.
- the oil guard 31g is provided in a polygonal cylindrical shape, the formation of these convex portions and concave portions is not essential.
- vent 21d provided on the outer peripheral side of the oil guard 31g that is outside the locus of the oil discharged from the nozzle 53 facilitates gas movement and facilitates oil discharge.
- the oil dischargeability from the (separation chamber 43) can be improved. Therefore, when the separated oil is discharged from the separation chamber 43 through the lower case 21 from the communication cylinder portion 22a serving as the lowermost discharge port, the volume of the oil is prevented from moving and the lower case 21 is prevented. It is possible to avoid the occurrence of negative pressure inside, and to improve the oil dischargeability (discharge capacity).
- the oil guard 31g restricts the scattering of the oil sprayed from the nozzle 53, and can prevent the drain hole 31c from draining the oil from the separation chamber 43 into the lower case 21 and passing through the drain hole 31c. Thus, the oil can be effectively discharged to the lower case 21 side below the lower partition wall member 31.
- the separated oil flows from the separation chamber 43 into the flow path 44a in the lower case 21 through the drain hole 31c, hangs down the flow path 44a, passes through the vent hole 21d, and is discharged from the communication cylinder portion 21a.
- the rotor 60 since the lower holder 72 is not provided with a through-hole penetrating in the vertical direction other than the opening 72 a serving as an insertion hole through which the spindle 52 is inserted, the rotor 60 has a central portion of the lower holder 72.
- the provided communication hole can be abolished, so that the gas to be treated can be prevented from leaking downward from the inside of the inner periphery of the lower holder 72, and even when oil smoke generated at a high temperature is sucked in, A reduction in separation efficiency can be avoided without sucking in large mist that does not exist.
- a gap 43a is formed between the outer peripheral edge of the flange 72d of the lower holder 72 and the inner peripheral surface 22f of the middle case 22, and a lower partition wall is formed between the inner peripheral surface 22f of the middle case 22 and the partition wall 72c.
- the first partition wall 31b of the member 31 is disposed, the flange 72d is spaced upward from the upper surface of the lower partition wall member 31, and the oil processing chamber 43b and the separation chamber 43 formed under the flange 72d are communicated by a gap 43a.
- the drain hole 31c vertically penetrates the lower partition wall member 31 at the site in the oil processing chamber 43b, the pressure in the oil processing chamber 43b is lower than the pressure in the separation chamber 43, and the pressure in the oil processing chamber 43b Since the difference with the pressure in the injection chamber 44 is small, the oil above the lower partition wall member 31 continuously flows into the drain hole 31c, and the oil backflow hardly occurs.
- the communication hole 32c of the middle partition member 32 is more than the inner peripheral surface of the middle case 22. Since it is arrange
- blow-by gas with an extremely high flow rate when blow-by gas with an extremely high flow rate is generated and a large amount of oil temporarily flows into the small amount of oil handled by the oil separator 2 during normal operation, the blow-by gas in the crankcase of the engine 4 is connected to the communication cylinder. It also flows into the injection chamber 44 through the portion 21a. The mist oil contained in the blow-by gas collides with the oil injected from the nozzle 53 and is captured. Thereby, mist-like oil is isolate
- blow-by gas in the injection chamber 44 flows into the separation chamber 43 through the drain hole 31 c of the lower partition wall member 31.
- blow-by gas of the same amount as the discharged oil flows into the separation chamber 43, so that the separated oil flows from the separation chamber 43 through the lower case 21 through the lower case 21 (communication cylinder portion 21a).
- the processing target gas is exemplified by blow-by gas.
- any gas containing mist-like oil to be separated can be a gas to be treated.
- the inner peripheral side portion 65 and the outer peripheral side portion 64 of the separation disk 63 are formed in a conical surface plate shape.
- the inner peripheral side portion 65 and the outer peripheral side portion 64 may be other conical surface plate shapes.
- the separation disk 63 is a rotationally symmetric body around the axis of the spindle 52, and the inner peripheral side portion 65 and the outer peripheral side portion 64 are polygonal pyramidal plane plates (for example, triangular pyramidal plane plates, quadrangular pyramidal plane plates). Or the like).
- the inner peripheral side portion 65 or the outer peripheral side portion 64 or both of the generatrix lines may be not a straight line but a curve with a predetermined curvature (for example, an arc, an elliptic curve, a parabolic curve, a hyperbola).
- the separation disk 63 may not be bent, and the separation disk 63 may be shaped like a conical plate.
- the rotational power of the rotor 60 and the spindle 52 uses the hydraulic pressure of oil supplied from the engine 4.
- the power of the engine 4 may be transmitted to the rotor 60 and the spindle 52 by a power transmission mechanism (for example, a belt transmission mechanism, a gear transmission mechanism, and a chain transmission mechanism), and the rotor 60 and the spindle 52 may rotate.
- a power source for example, an electric motor independent from the engine 4 may rotate the rotor 60 and the spindle 52.
- the oil separator 2 is attached to the side surface of the engine 4 (see FIG. 1), but the location where the oil separator 2 is attached is not limited to the side surface of the engine 4.
- the oil separator 2 may be attached to the front surface, rear surface, upper surface, or lower surface of the engine 4.
- the oil separator 2 may be attached to the vehicle body (particularly, the engine room) instead of the engine 4.
- An oil circulation pipe that is piped from the communication cylinder portion 21a to the engine 4 may be installed as necessary.
- the ventilation system 1 is a closed system in which blow-by gas treated by the oil separator 2 is reduced to the intake-side flow path 6 through the breather pipe 3.
- the ventilation system 1 may be an open air system in which blow-by gas processed by the oil separator 2 is discharged to the atmosphere.
- the PCV valve 90 may be provided as described above or may not be provided.
- the form of the lower partition member 31 is not limited to the above-described embodiment.
- a guide portion 31h having a shape such as an arcuate cross section is provided around the through hole 31a, and the oil sprayed on the inner peripheral surface 31f of the oil guard 31g while turning with the rotation of the spindle 52 is the inner peripheral surface 31f. May be prevented from rising.
- a wall 31i that prevents the oil that has passed over the guide 31h from moving to the outer peripheral side of the lower partition wall member 31 may be provided between the guide 31h and the drain hole 31c.
- the form of the lower case 21 is not limited to the above-described embodiment.
- the part to which the communicating cylinder part 21a is connected is shaped to bulge outward from the drain hole 31c, and instead of the vent hole 21d, the oil after separation is discharged further to the outer peripheral side than the oil guard 31g. You may make it provide the expansion flow path 44b for making it promote.
- the expansion flow path 44b communicates with a flow path 44a that is separated from the injection chamber 44 by an oil guard 31g in the lower case 21.
- second oil supply path 53 ... nozzle, 53a ... injection port, 54 ... bearing, 55 ... lower bearing, 56 ... upper bearing, 60 ... rotor, 61 ... separation disk group, 62 ... Center side space, 63 ... Separation disk, 63a ... Rib, 64 ... Outer peripheral part of the separation disk, 5: Separation disk inner peripheral part, 66: Mounting opening, 71 ... Upper holder, 71a ... Opening, 72 ... Lower holder, 72a ... Opening, 72c ... Partition wall, 72d ... Flange, 73 ... Disc holding part, 73a ... Hub part, 73b ... Spoke part, 85 ... Magnetic sensor, 86 ... Permanent magnet, 87 ... Seal, 90 ... PCV valve, 91 ... Diaphragm, 92 ... Upper spring, 93 ... Lower spring
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Abstract
Description
スピンドルと共に回転可能に設けられるローターの内周側空間に、ミスト状オイルを含む処理対象ガスと分離用オイルとを導入して前記ローターを回転させることで、前記処理対象ガスから前記ミスト状オイルを分離するオイルセパレータであって、
前記スピンドル及び前記ローターを有する分離室を収容する内部空間及び当該内部空間に通じるインレット孔を有するケースと、
前記内部空間の下端に配置され、前記スピンドルを挿通させる通し孔が中央に上下を貫通して設けられた下部隔壁部材と、を備え、
前記ローターが、
前記分離室内において上下方向に間隔を置いて積み重ねられた複数の分離ディスクと、
前記複数の分離ディスクを下から保持する下部ホルダと、を有し、
前記下部ホルダには、前記スピンドルを挿通させる挿通孔以外に前記ローターの上下方向に貫通する貫通孔が設けられておらず、
前記下部隔壁部材の上面側には、
前記ケースの内壁面と前記下部ホルダの外周縁との間の全周に亘って立設された第一の隔壁部と、
前記第一の隔壁部における全周のうちの少なくとも一部の下方に配置され、前記下部隔壁部材を上下に貫通するドレン孔と、が設けられていることを特徴とする。
前記下部隔壁部材の前記第一の隔壁部における外周側には、所定の間隔でリブが設けられている。
これにより、下部隔壁部材上の第一の隔壁部外周側にあるオイルが、ローターの回転で生じた旋回流(風)によって連れ回されるのを防止できると共に、当該オイルを第一の隔壁部の下方に設けられたドレン孔へと流れ込ませ易くなり、結果として、下部隔壁部材の下方の室へ効率よく排出できる。
前記下部隔壁部材の下面側を覆い、当該下部隔壁部材の下方に噴射室を区画する下部ケースと、
前記駆動室内において前記スピンドルの外周面から突設され、周方向に向けて駆動用オイルを噴射して、前記スピンドル及び前記ローターを回転させるノズルと、を更に備え、
前記下部隔壁部材の下面側には、
前記ノズルの回転軌跡よりも外周側に下方に垂下する筒状の第二の隔壁部が設けられ、
前記第二の隔壁部の内周面には、上下に延在する凸部および凹部の少なくとも一方が複数形成されている。
前記ノズルの回転軌跡よりも外周側に下方へ垂下する多角筒形状で設けられていても良いし、更にその内周面には、上下に延在する凸部および凹部の少なくとも一方が複数形成されていても良い。
前記下部ケースに設けられ、前記噴射室からエンジンのクランクケースに通じた連通筒部を更に備え、
前記連通筒部の内部には、
前記第二の隔壁部よりも外周側に、前記オイルの排出を促進させるための通気口が設けられている。
前記下部ホルダの外周縁から上方に向けて突出した筒状の仕切壁と、
前記仕切壁から径方向外方に縁出したフランジと、を更に備え、
前記フランジは、前記ケースの内周面との間に隙間を有して配置され、
前記第一の隔壁部が前記ケースの内周面と前記仕切壁との間に配置され、
前記フランジと前記下部隔壁部材との間にオイル処理室が形成され、
前記オイル処理室が、前記フランジと前記ケースの内周面との間の前記隙間を通じて前記分離室に通じており、
前記ドレン孔が前記オイル処理室内の部位において前記下部隔壁部材を貫通する。
前記下部隔壁部材の前記ドレン孔が、前記第一の隔壁部の下方から前記通し孔側に向けて拡張されている。
前記下部隔壁部材は、前記通し孔の周囲に下方からオイルが上がって来るのを防止するガイドが設けられている。
前記下部隔壁部材は、前記ガイドと前記ドレン孔との間に、前記ガイドを乗り越えたオイルが前記下部隔壁部材の外周側へと移動するのを防止する壁部が設けられている。
前記下部隔壁部材は、前記ガイドと前記壁部の間に前記オイルを下方へ排出するための穴が設けられている。
前記壁部は、前記下部隔壁部材の表裏を貫いて垂直に設けられている。
一方、導入路41の上側が隔壁部22aによって塞がれ、隔壁部22aの上側の中空と導入路41が隔壁部22aによって仕切られている。
ローターユニット50は、ブローバイガスからミスト状オイルを分離するための機構である。ローターユニット50は、スピンドルシャフト51、スピンドル52、ローター60及び複数のノズル53等を備える。
スピンドル52及び軸受55、56が軸方向に沿って僅かに移動できるように、僅かな隙間が下側軸受55と軸受54との間や上側軸受56とワッシャー57との間やワッシャー57とナット58との間に存在する。具体的には、ローター60の回転時にはスピンドル52及び軸受55、56が軸方向に沿って上昇し、ローター60の停止時にはスピンドル52及び軸受55、56が下降する。
また、スピンドル52の内周面と上側軸受56との間に僅かな隙間が存在し、オイル供給路52a内のオイルがその隙間を通じてスピンドル52の外に流出する。
内周側部分65は、分離ディスク63の中心の下方を頂点とした錐面型の板状に形作られている。そのため、内周側部分65は、径方向外方に向けて上向きに傾斜する。外周側部分64は、分離ディスク63の中心の上方を頂点とした錐面型の板状に形作られている。そのため、外周側部分64は、径方向外方に向けて下向きに傾斜する。外周側部分64の内周縁が内周側部分65の外周縁に繋がって、外周側部分64が内周側部分65の外周縁から外側へ続き、外周側部分64と内周側部分65が一体成形されている。ここで、錐面とは、裁頭錐体の外周面をいう。
さらに、分離ディスク63の積み重ね枚数が増えても、これら分離ディスク63の積み重ね高さが高くなることを抑えることができる。
また、分離ディスク63が曲折しているので、径方向に対する内周側部分65及び外周側部分64の傾斜角を急勾配にした状態でも、分離ディスク63の自体の高さを抑えることができる。径方向に対する内周側部分65及び外周側部分64の傾斜角が急勾配であれば、オイルの分離効率が高い。
PCVバルブ90は、環流されるブローバイガスの流量を調整することによって、エンジン4(図1)の吸気圧力やクランクケース側の圧力を適切に調整する。具体的には、PCVバルブ90は、上部隔壁部材33の連通穴33aの開き具合を調整することによってブローバイガスの流量を調整する。
エンジン4からオイルセパレータ2に供給されるオイルの一部(駆動用オイル)は、オイル案内パイプ21b、第一オイル供給路51b及び第二オイル供給路52aを経由してノズル53内に流れ込む。そして、ノズル53内の駆動用オイルが噴射口53aから噴射する。噴射口53aからの駆動用オイルの噴射向きはスピンドル52の軸線を中心とした周方向である。より具体的には、駆動用オイルの噴射向きがスピンドル52の軸線に対して垂直な方向であって、スピンドル52の軸線が鉛直方向に沿っている場合には駆動用オイルの噴射向きが水平方向である。駆動用オイルの噴射圧によってスピンドル52及びローター60がスピンドル52の軸線を中心にして回転する。スピンドル52及びローター60の回転の向きは駆動用オイルの噴射の向きの反対である。
オイルガード31gに吹き付けられた駆動用オイルは、オイルガード31gの内周面31fに沿って流下する。その駆動用オイルの温度が80~110℃と高いため、その駆動用オイルがオイルセパレータ2を下部ケース21の側から加温する。これにより、寒冷地での使用であっても、凍結等によるオイルセパレータ2の動作不具合の発生を抑えることができる。流下した駆動用オイルは、下部ケース21内の底部から連通筒部21aを通ってエンジン4に戻される。
また、分離ディスク63が折れ曲がっておらず、分離ディスク63が錐面板状に形作られてもよい。
Claims (12)
- スピンドルと共に回転可能に設けられるローターの内周側空間に、ミスト状オイルを含む処理対象ガスと分離用オイルとを導入して前記ローターを回転させることで、前記処理対象ガスから前記ミスト状オイルを分離するオイルセパレータであって、
前記スピンドル及び前記ローターを有する分離室を収容する内部空間及び当該内部空間に通じるインレット孔を有するケースと、
前記内部空間の下端に配置され、前記スピンドルを挿通させる通し孔が中央に上下を貫通して設けられた下部隔壁部材と、を備え、
前記ローターが、
前記分離室内において上下方向に間隔を置いて積み重ねられた複数の分離ディスクと、
前記複数の分離ディスクを下から保持する下部ホルダと、を有し、
前記下部ホルダには、前記スピンドルを挿通させる挿通孔以外に前記ローターの上下方向に貫通する貫通孔が設けられておらず、
前記下部隔壁部材の上面側には、
前記ケースの内壁面と前記下部ホルダの外周縁との間の全周に亘って立設された第一の隔壁部と、
前記第一の隔壁部における全周のうちの少なくとも一部の下方に配置され、前記下部隔壁部材を上下に貫通するドレン孔と、が設けられている
ことを特徴とするオイルセパレータ。 - 前記下部隔壁部材の前記第一の隔壁部における外周側には、所定の間隔でリブが設けられている
ことを特徴とする請求項1に記載のオイルセパレータ。 - 前記下部隔壁部材の下面側を覆い、当該下部隔壁部材の下方に噴射室を区画する下部ケースと、
前記駆動室内において前記スピンドルの外周面から突設され、周方向に向けて駆動用オイルを噴射して、前記スピンドル及び前記ローターを回転させるノズルと、を更に備え、
前記下部隔壁部材の下面側には、
前記ノズルの回転軌跡よりも外周側に下方に垂下する筒状の第二の隔壁部が設けられ、
前記第二の隔壁部の内周面には、上下に延在する凸部および凹部の少なくとも一方が複数形成されている
ことを特徴とする請求項1または2に記載のオイルセパレータ。 - 前記下部隔壁部材の下面側を覆い、当該下部隔壁部材の下方に噴射室を区画する下部ケースと、
前記駆動室内において前記スピンドルの外周面から突設され、周方向に向けて駆動用オイルを噴射して、前記スピンドル及び前記ローターを回転させるノズルと、を更に備え、
前記下部隔壁部材の下面側には、
前記ノズルの回転軌跡よりも外周側に下方へ垂下する多角筒形状の第二の隔壁部が設けられている
ことを特徴とする請求項1または2に記載のオイルセパレータ。 - 前記第二の隔壁部の内周面には、上下に延在する凸部および凹部の少なくとも一方が複数形成されている
ことを特徴とする請求項4に記載のオイルセパレータ。 - 前記下部ケースに設けられ、前記噴射室からエンジンのクランクケースに通じた連通筒部を更に備え、
前記連通筒部の内部には、
前記第二の隔壁部よりも外周側に、前記オイルの排出を促進させるための通気口が設けられている
ことを特徴とする請求項3~5のいずれか一項に記載のオイルセパレータ。 - 前記下部ホルダの外周縁から上方に向けて突出した筒状の仕切壁と、
前記仕切壁から径方向外方に縁出したフランジと、を更に備え、
前記フランジは、前記ケースの内周面との間に隙間を有して配置され、
前記第一の隔壁部が前記ケースの内周面と前記仕切壁との間に配置され、
前記フランジと前記下部隔壁部材との間にオイル処理室が形成され、
前記オイル処理室が、前記フランジと前記ケースの内周面との間の前記隙間を通じて前記分離室に通じており、
前記ドレン孔が前記オイル処理室内の部位において前記下部隔壁部材を貫通する
ことを特徴とする請求項1~6のいずれか一項に記載のオイルセパレータ。 - 前記下部隔壁部材の前記ドレン孔が、前記第一の隔壁部の下方から前記通し孔側に向けて拡張されている
ことを特徴とする請求項1~7のいずれか一項に記載のオイルセパレータ。 - 前記下部隔壁部材は、前記通し孔の周囲に下方からオイルが上がって来るのを防止するガイドが設けられている
ことを特徴とする請求項1~8のいずれか一項に記載のオイルセパレータ。 - 前記下部隔壁部材は、前記ガイドと前記ドレン孔との間に、前記ガイドを乗り越えたオイルが前記下部隔壁部材の外周側へと移動するのを防止する壁部が設けられている
ことを特徴とする請求項9に記載のオイルセパレータ。 - 前記下部隔壁部材は、前記ガイドと前記壁部の間に前記オイルを下方へ排出するための穴が設けられている
ことを特徴とする請求項10に記載のオイルセパレータ。 - 前記壁部は、前記下部隔壁部材の表裏を貫いて垂直に設けられている
ことを特徴とする請求項10または11に記載のオイルセパレータ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/090,769 US20200325807A1 (en) | 2016-04-06 | 2016-04-06 | Oil separator |
EP16897883.1A EP3441146A4 (en) | 2016-04-06 | 2016-04-06 | OIL SEPARATOR |
JP2018510165A JP6934471B2 (ja) | 2016-04-06 | 2016-04-06 | オイルセパレータ |
CN201680084325.XA CN109070098B (zh) | 2016-04-06 | 2016-04-06 | 油分离器 |
PCT/JP2016/061209 WO2017175324A1 (ja) | 2016-04-06 | 2016-04-06 | オイルセパレータ |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2016/061209 WO2017175324A1 (ja) | 2016-04-06 | 2016-04-06 | オイルセパレータ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017175324A1 true WO2017175324A1 (ja) | 2017-10-12 |
Family
ID=60000339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2016/061209 WO2017175324A1 (ja) | 2016-04-06 | 2016-04-06 | オイルセパレータ |
Country Status (5)
Country | Link |
---|---|
US (1) | US20200325807A1 (ja) |
EP (1) | EP3441146A4 (ja) |
JP (1) | JP6934471B2 (ja) |
CN (1) | CN109070098B (ja) |
WO (1) | WO2017175324A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020002902A (ja) * | 2018-06-29 | 2020-01-09 | 東京濾器株式会社 | オイルセパレータ |
JP2023505568A (ja) * | 2019-12-16 | 2023-02-09 | アルフデックス・アーベー | 遠心分離機および遠心分離機を備える機械 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112881041B (zh) * | 2021-01-11 | 2022-10-25 | 中车青岛四方机车车辆股份有限公司 | 轴箱定位装置及构架试验装置 |
US20240151170A1 (en) * | 2021-03-10 | 2024-05-09 | LTH Holdings Pty Ltd | Liquid separator system |
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-
2016
- 2016-04-06 JP JP2018510165A patent/JP6934471B2/ja active Active
- 2016-04-06 US US16/090,769 patent/US20200325807A1/en not_active Abandoned
- 2016-04-06 EP EP16897883.1A patent/EP3441146A4/en not_active Withdrawn
- 2016-04-06 WO PCT/JP2016/061209 patent/WO2017175324A1/ja active Application Filing
- 2016-04-06 CN CN201680084325.XA patent/CN109070098B/zh active Active
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WO2004022239A1 (en) * | 2002-09-04 | 2004-03-18 | Alfa Laval Corporate Ab | An apparatus for cleaning of gas |
WO2014155613A1 (ja) * | 2013-03-28 | 2014-10-02 | 東京濾器株式会社 | オイルセパレータ |
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WO2016046944A1 (ja) * | 2014-09-25 | 2016-03-31 | 東京濾器株式会社 | オイルセパレータ用分離ディスク、オイルセパレータ用ローター、及びオイルセパレータ |
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Cited By (4)
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JP2020002902A (ja) * | 2018-06-29 | 2020-01-09 | 東京濾器株式会社 | オイルセパレータ |
JP7171268B2 (ja) | 2018-06-29 | 2022-11-15 | 東京濾器株式会社 | オイルセパレータ |
JP2023505568A (ja) * | 2019-12-16 | 2023-02-09 | アルフデックス・アーベー | 遠心分離機および遠心分離機を備える機械 |
JP7383823B2 (ja) | 2019-12-16 | 2023-11-20 | アルフデックス・アーベー | 遠心分離機および遠心分離機を備える機械 |
Also Published As
Publication number | Publication date |
---|---|
EP3441146A1 (en) | 2019-02-13 |
CN109070098B (zh) | 2020-07-14 |
JP6934471B2 (ja) | 2021-09-15 |
CN109070098A (zh) | 2018-12-21 |
US20200325807A1 (en) | 2020-10-15 |
JPWO2017175324A1 (ja) | 2018-08-23 |
EP3441146A4 (en) | 2019-12-04 |
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