JP2004143935A - Oil particle collecting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil particle collecting device capable of effectively collecting an oil particle by suppressing an increase in pressure loss. <P>SOLUTION: The oil particle collecting device 1 is provided with a space forming body 3 which forms a space for making gas circulate and equipped with a gas flow port 6 and 7, a gas exhaust port 9, and oil discharge port 11, 12; and a partitioning parts 20-22, 24 and 25 which partially intercept a space between the gas flow ports 6, 7 and the gas exhaust port 9 of the space forming body 3. Each partitioning parts 21-22 is provided with a collecting part 27 where a plurality of penetrating holes 29 with internal diameters of not less than 2 mm to 3 mm are formed to make a distance not less than 3 mm to 6 mm between each center. In the oil particle collecting device, a comparatively small oil particle which is hard to be collected with a partitioning part not formed with a through-hole can be well omitted and collected, and the ratio of an opening area in the partitioning part greater than a predetermined level can be obtained to reduce an increase in pressure loss. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a device for collecting oil particles in an airflow, and more particularly to a device suitable for collecting oil particles contained in blow-by gas discharged from an engine part of a vehicle.
[0002]
[Prior art]
In an engine using a piston of an automobile or the like, blow-by gas containing unburned fuel gas leaking from a gap between the cylinder and the piston and mixed with oil particles obtained by forming engine oil into particles is generated. Generally, the oil particles in the blow-by gas are separated and collected and returned to the engine oil circulation system, and the gas is generally returned to the intake system of the engine.
As a device for separating and collecting oil mist particles, a maze type oil separator may be used. For example, as shown in FIG. 12, the maze-type oil separator includes a gas passage 62 having a bent portion, and causes oil mist particles in the gas to collide with a partition plate 60 forming the bent portion by inertia force. The oil is collected by attaching it. In such an oil separator, relatively large oil mist particles collide with the partition plate 60 and the inner wall and are removed from the gas, but smaller oil mist particles do not collide and are difficult to remove from the gas. For this reason, there is a type in which a suitable through hole 64 is provided in the partition plate 60 and small oil mist particles are dropped from the air flow by utilizing a sudden change in the air flow generated around the through hole 64.
Note that the present inventors have obtained these technologies from commercially available products and the like without reference to literatures.
[0003]
[Problems to be solved by the invention]
The smaller the inner diameter of the through hole 64 is, the smaller the oil mist particles can be collected. However, if the inner diameter of the through hole 64 is small, the pressure loss increases. If the inner diameter of the through hole 64 is small, the collected oil may accumulate and clog.
[0004]
Therefore, an object of the present invention is to provide an oil particle collecting apparatus capable of efficiently collecting oil particles while suppressing an increase in pressure loss.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present inventors have focused on the weight of oil particles that cannot be collected by a partition plate without a through hole and that are present in a relatively large amount in blow-by gas. In view of the above and pressure loss, the following invention has been completed. That is, the present invention provides, in an oil particle collecting apparatus, a gas inlet, a gas outlet, and a space forming body that forms a space through which a gas including an oil outlet can flow, and the gas in the space forming body. A plurality of partition portions that partially block a space between the inflow port and the gas discharge port, and at least one of the plurality of partition portions has a plurality of through holes having an inner diameter of 2 mm or more and 3 mm or less, It is configured to include a collection unit arranged so that the distance between the centers is 3 mm or more and 6 mm or less.
In this oil particle collecting device, when a gas flow is applied to the collecting portion in the same manner as in the related art, it is difficult to collect in the through hole having an inner diameter of 2 mm or more and 3 mm or less and around the opening end thereof in the partition portion having no through hole. It is possible to generate a change in the direction of the gas flow to the extent that extremely small oil particles fall off, that is, a disturbance in the gas flow. In addition, when the distance between the centers of the through holes is 3 mm or more and 6 mm or less, the collision portion of the oil particles is secured, and the turbulence of the air flow is favorably generated, and the ratio of the opening area in the partition portion is set to a predetermined value or more. As a result, an increase in pressure loss is reduced. Therefore, in this oil particle collecting device, the oil collecting rate is improved, and the increase in pressure loss is reduced.
[0006]
In addition, the present inventors have focused on the fact that oil particles can be dropped from a gas flow by giving a sudden change in direction to the gas flow, and have completed the following invention. That is, the present invention provides a gas inlet, a gas outlet, a space forming body that forms a space through which a gas can be provided including an oil outlet, and the gas inlet and the gas outlet of the space forming body. And a plurality of partitions that partially block a space between the traps, and at least one of the plurality of partitions has a plurality of through holes formed with an open end protruding toward the gas inlet. Provided is an oil particle collecting device, comprising:
In this device, the airflow heading toward the portion of the concave trapping portion with respect to the opening end of the through hole returns to the projecting direction of the opening end, and then moves toward the gas discharge port of the space forming body through the through hole. . The oil particles are shaken off from the airflow and adhere to the collecting portion at the portion where the direction of the airflow changes drastically. With this configuration, smaller oil particles can be satisfactorily collected.
Further, this effect can also be obtained by adopting a configuration in which the opening end of the through hole protrudes toward the gas inlet side in the trapping section having the through hole having the predetermined inner diameter and the center-to-center distance. Thus, the device can more efficiently collect the oil particles.
[0007]
Further, in the oil particle collecting device in which the opening ends of the through holes project, if the projecting portions of the opening ends of the plurality of through holes are formed to be separated from each other, the oil adhering to the collecting portion may be removed. Since the oil flows down through portions other than the open ends, the oil can be collected well.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described in detail with reference to the drawings.
1 and 2 show a cross section of an oil particle collecting apparatus 1 according to a first embodiment of the present invention. The oil particle collecting device 1 of FIG. 1 is provided in a flow passage for transferring blow-by gas leaking to a crankcase of a vehicle to an intake system of an engine, and is integrated with the crankcase.
[0009]
The oil particle collecting device 1 includes a space forming body 3, and has a plurality of partitions 20 to 22, 24, and 25 inside the space forming body 3.
The space forming body 3 is a space portion through which gas can flow in a predetermined direction. The space forming body 3 can be formed by various members into a shape having internal spaces of various shapes. Typically, the shape has a long space in the gas flow direction.
[0010]
The space forming body 3 of the present embodiment is formed by a rectangular recessed portion 4 formed on the cylinder head cover and having one surface opened in the longitudinal direction, and a baffle plate 5 attached to close the opening of the recessed portion 4. Have been. The internal space of the space forming body 3 is formed in a substantially rectangular shape whose cross-sectional shape increases from one end to the other end (right to left in FIG. 1).
[0011]
The space forming body 3 has at least one gas inlet and a gas outlet. In the present embodiment, gas inlets 6 and 7 are provided at lower portions of both ends of the space forming body 3 in the longitudinal direction, respectively. One gas outlet 9 is formed on one wall surface of the central portion of the space forming body 3.
[0012]
The space forming body 3 includes oil outlets 11 and 12 for discharging oil recovered from gas in the space forming body 3. The oil outlets 11 and 12 are arranged at a portion that becomes the bottom surface 3a when the oil particle collecting device 1 is attached, and are formed so that oil collected on the bottom surface 3a flows in. In this embodiment, the oil outlets 11 and 12 are provided one by one in the vicinity of each of the gas inlets 6 and 7.
[0013]
The partition portions 20 to 22, 24, and 25 are members that partially block the space in the space forming body 3 where the gas flow is formed while maintaining a communication state, and apply a load that changes the flow direction to the gas flow. It is. In the present embodiment, five partitions 20 to 22, 24, and 25 are provided between the gas inlets 6, 7 and the gas outlet 9, respectively.
[0014]
The partition can be formed in various shapes. When it is formed in a plate shape, it is preferable because it saves space and facilitates formation of a through hole 29 described later. The partition portion is formed of various members such as metal and resin that are not easily deteriorated by oil or gas. Further, for example, it may be formed integrally with a member constituting the wall surface of the space forming body 3 such as the baffle plate 5.
[0015]
In the oil particle collecting apparatus 1 shown in FIG. 1, the partitioning portions 20 to 22 are formed in a flat plate shape, and the upper end is formed at the tip end inclined at about 45 ° toward the gas inlets 6 and 7. The partitions 20 to 22 extend substantially vertically from the bottom surface 3 a of the space forming body 3, and are disposed between the gas inlets 6 and 7 and the gas outlet 9.
Further, the partition portions 24 and 25 are formed in a flat plate shape. The partitions 24 and 25 extend from the upper surface 3b of the space forming body 3 in parallel to the partitions 20 to 22 and are disposed between the partitions 20 and 21 and between the partitions 21 and 22, respectively.
[0016]
The partition unit includes a collection unit. The collection unit may be provided in all the partition units, but is preferably provided in a partition unit other than the partition unit 20 closest to the gas inlet. In addition, since the gas flow in the space forming body 3 is configured to bend and advance, all the partition portions are not provided with the collecting portions, but are provided at intervals such as every other partition portion arranged. Is preferred. In the present embodiment, each of the two partition portions 21 and 22 extending from the bottom surface 3 a of the space forming body 3 and near the gas outlet 9 is provided with the collection portion 27.
[0017]
The collecting portion 27 is a portion that includes a plurality of through holes, is capable of colliding with the gas flow, and is capable of inserting the gas flow through the through holes. The through holes 29 formed in the collecting section 27 are arranged so that the inner diameter is 2 mm or more and 3 mm or less, and the distance between the centers is 3 mm or more and 6 mm or less. The collecting unit 27 can collect relatively small oil particles that are difficult to remove at the partition having no through hole. Further, since the total area ratio of the through-holes 29 on the surfaces of the gas inlets 6 and 7 of the trapping part 27 is as large as about 40%, the pressure loss of the gas flow caused by passing through the trapping part 27 is reduced. The increase has been reduced. Specifically, the collecting section 27 can collect oil particles having a diameter of 2 μm or more in a good manner.
[0018]
FIG. 2 shows a plan view of a collecting section 27 which is a more preferred embodiment. The collecting section 27 has through holes 29 having an inner diameter of 3 mm, and the through holes 29 are arranged so that the center-to-center distance is 4.2 mm. The collecting portion 27 in which through holes having an inner diameter of 3 mm are arranged at an interval of 4.2 mm ± 1 mm between centers is used to collect oil particles from gas containing engine oil particles leaking from an engine part for a vehicle. Particularly preferred. Specifically, oil particles having a diameter of about 2 μm can be satisfactorily adhered.
[0019]
Further, the thickness of the collecting section 27 is preferably 1 mm or more and 8 mm or less. If it exceeds 8 mm, the pressure loss may increase. When the thickness is 1 mm or less, a preferable strength may not be provided to the collection unit 27. In the present embodiment, the thickness of the collecting section 27 is 3 mm.
[0020]
In the oil particle collecting device 1, gas inlets 6 and 7 are opened to a crankcase, and a gas outlet 9 is installed in communication with an intake system of an engine. As a result, a pressure from the gas inlets 6 and 7 to the outside of the gas outlet 9 always acts in the space forming body 3. The gas is introduced into the space forming body 3 from the gas inlets 6, 7 to form a gas flow, and goes over or passes through the partitions 20, 24, 25 to the gas outlet 9. The oil outlets 11 and 12 are connected to a circulation system of engine oil in a vehicle.
[0021]
The gas flow first collides with the partition 20 closest to the gas inlets 6, 7 and is bent in a direction along the partition 20. Larger oil particles (for example, particles having a diameter of 5 μm or more) collide with and adhere to the partition portion 20 due to inertial force, or are shaken off without being able to follow a change in direction, and are removed from the gas flow. In addition, the flow velocity of the gas is increased at the distal end of the partitioning section 20 due to the narrow flow passage. At this time, the oil particles in the gas flow moving along the partitions 20 to 22 are likely to be caught by the collision with the front end portion and are removed from the gas flow. The gas having passed over the partition 20 also collides with the partition 24 extending from the upper surface 3b, whereby the flow is similarly bent, and oil particles are removed from the gas by a similar mechanism. The same applies to the partition 25.
[0022]
Most of the gas flow colliding with the partitions 21 and 22 moves to the gas outlet 9 through the through hole 29. At this time, the gas flow receives a force directed toward the through hole 29, so that the oil particles easily come into contact with the trapping portion 27, particularly around the opening of the through hole 29, and easily adhere thereto. Since the size of the through hole 29 is as small as 2 mm or more and 3 mm or less, the inertia force of the oil particles due to the change in the direction of the gas flow is large, and the oil particles are collected well. Further, since the center-to-center distance between the through holes 29 is not less than 3 mm and not more than 6 mm, the total opening area (the ratio of the through holes 29) in the collecting portion 27 is as large as about 40%. The increase in pressure loss is suppressed.
[0023]
Further, in the collecting section 27, the gas flow colliding with a portion other than the through hole 29 passes through the through hole 29 along the surfaces of the partition portions 21 and 22 or once reversely flows. At this time, the turbulence of the gas flow lowers the propulsive force applied to the oil particles, causing the oil particles to fall by their own weight, or the oil particles being entrained in the turbulent flow and adhering to the collecting portion 27. Alternatively, it is also conceivable that the oil particles collide with each other and combine to become larger particles and fall by their own weight.
A part of the gas flow colliding with the partitions 21 and 22 may turn upward along the partition 21 and pass over the upper end of the partition 21.
[0024]
The oil particles that cannot follow the gas flow adhere to the partition portions 20 to 22, 24, and 25 and each wall surface (including the bottom surface 3a) of the space forming body 3, and are moved to the bottom surface 3a of the space forming body 3, The air is discharged from the outlets 11 and 12 to the outside of the space forming body 3.
[0025]
In the oil particle collecting device 1, the collecting portion 27 can apply a larger load to the gas flow than the partition portion having no through hole 29 in a state where a predetermined opening area ratio is secured. . For this reason, an increase in pressure loss can be reduced, and smaller oil particles in the gas flow can be collected. Therefore, this device can provide a gas having a high oil collection rate and a low oil residue rate.
[0026]
3 and 4 show an oil particle collecting device according to a second embodiment. The oil particle collecting device 31 has the same configuration as that of the first embodiment except that partitioning portions 33 and 34 are provided in place of the partitioning portions 21 and 22. Omitted.
The partitioning portions 33 and 34 are formed in the collecting portion 36 in a flat plate shape, in which the through holes 38 are provided evenly as a whole. The partitions 33 and 34 extend from the bottom surface 3 a of the space forming body 3 and are arranged near the gas outlet 9.
[0027]
As shown in FIGS. 3 and 4, the trapping portion 36 has a plurality of through holes 38, and an opening end of the through hole 38 is formed in a protruding portion 40 that protrudes toward the gas inlet side.
The through holes 38 may be formed in various shapes and various arrangements. For example, the shape is not limited to a circle, and may be formed in a rectangular shape like the through hole 51 shown in FIG. Further, in the case of a circular through hole, it is preferable that the through hole is formed to have an inner diameter of 2 mm or more and 3 mm or less, as in the first embodiment, and to be arranged so that the distance between the centers is 3 mm or more and 6 mm or less.
[0028]
The projecting portion 40 is a portion formed so as to protrude around the opening end of the through hole 38 toward the gas inlet side, that is, the side opposite to the gas flow. It is the part that gets hooked. For example, the gas flow that collides with a portion formed in a concave shape with respect to the protrusion 40 returns to get over the protrusion 40. Further, a gas flow is generated in a direction along the surface of the collecting portion 36 toward the through hole 38. These combinations and other gas flows resulting from them are generated, so that a complicated gas flow is formed on the gas inlets 6 and 7 side of the collection unit 36. If the amount of protrusion of the protrusion 40 from the flat portion of the collecting portion 36 is smaller than the inner diameter of the through hole 38, turbulence is generated to such an extent that a large amount of oil particles contained in the gas can be collected. Can be preferred. Further, specifically, in order to generate a predetermined turbulence in the gas flow, the protrusion amount of the protrusion 40 is preferably 1 mm or more. In the oil particle collecting device for blow-by gas, the protrusion amount of the protrusion 40 is preferably 1 mm or more and 3 mm or less.
[0029]
The shape of the protruding portion is not particularly limited, but is typically substantially equal to the shape of the opening of the through hole 38. For example, as shown in FIG. 4, it may be formed in an annular (cylindrical) projection 40 concentric with the circular through hole 38, or as shown in FIG. 5, the same center as the rectangular through hole 51. It may be formed on a rectangular frame-shaped projection 52 provided. FIG. 6 is an example in which the shape of the through hole 54 and the shape of the protrusion 55 are different, and a rectangular protrusion 55 is formed in the circular through hole 54. The projecting portion 55 can disturb the gas flow between the projecting portion 55 and a portion that does not project in the horizontal direction. According to the present invention, the opening end of the through hole is formed on the gas inlet side by bending the partition portion and forming the through hole 54 at a portion provided to protrude toward the gas inlet side as shown in FIG. It can be formed to protrude.
[0030]
As shown in FIGS. 4 and 5, it is preferable that the protruding portion has a corner on the extension of the edge of the through-hole because oil particles can easily adhere to the corner. More preferably, the shape is provided with a corner portion also on the collection portion 36 side. The corners are preferably about 90 °, but may be acute or obtuse.
[0031]
It is preferable that the protrusions 40 are formed independently for each through hole 38, that is, the protrusions 40 are formed apart from each other. With this configuration, the turbulence of the gas flow including the backflow as described above can be caused over the entire circumference of the through hole 38. In addition, the oil particles attached to the collecting portion 36 can flow down to the bottom surface 3a of the space forming body 3 through the portion that does not protrude.
[0032]
Further, from the viewpoint of oil recovery, it is preferable that a portion other than the protruding portion 40 of the collecting portion 36 be formed to communicate from the upper portion to the bottom surface 3a of the space forming body 3. For example, as shown in FIG. 7, in the horizontal direction, each protruding portion 57 can be a collecting portion formed separately from each other in the vertical direction and connected to each other in the vertical direction. In this embodiment, the oil particles adhering to the collecting portion 36 can move favorably to the bottom surface 3a of the space forming body 3 through the portion of the collecting portion 36 that does not protrude. become.
[0033]
The collecting section 36 shown in FIGS. 3 and 4 is formed by arranging through-holes 38 having an inner diameter of 4 mm so that the distance between the centers becomes 8.4 mm. Further, the protrusions 40 of the through holes 38 have a width of 1 mm in the radial direction and are formed in a ring shape protruding 1 mm from the plane of the collection unit 36. The protrusions 40 of the through holes 38 It is formed apart.
[0034]
In the oil particle collecting device 31, the oil particles collide with and adhere to the collecting unit 36 and cannot follow a sudden change in the direction of the gas flow. Adhere to. Because of the rapid change in direction of the gas flow, smaller oil particles can also be dropped from the gas flow.
In addition, the oil particles attached to the collecting portion 36, particularly the portion of the collecting portion 36 that does not protrude and the lower portion of the protruding portion 40, when flowing down by gravity, remove the portion that does not protrude from the protruding portion 40 of the collecting portion 36. It moves to the bottom surface 3 a of the space forming body 3 through the oil outlets 11 and 12. In this embodiment, the oil adhering to the collection unit 36 falls well, and the time for which the oil remains in the collection unit 36 is reduced. For this reason, the oil adhering to the trapping portion 36 is accumulated in the holes of the through holes 38, and is prevented from being dispersed in the gas again by the gas flow passing through the through holes 38.
Therefore, in the oil particle collecting device 31 including the collecting unit 36, the re-mixing into the gas is suppressed, the oil particles can be efficiently collected, and the increase in the pressure loss is suppressed.
[0035]
Note that the present invention is not limited to the above embodiment, and various modifications are possible.
The position of the partition provided with the collecting unit is not limited to the position extending from the bottom surface of the space forming body, and may be the position extending from the upper surface of the space forming body. Further, it may be provided in a partition provided near the gas inlet. Further, the partition is not limited to the upper surface or the bottom surface of the space forming body, and may extend from the side surface. Further, the projection angle of the partition from the space forming body is not limited to the vertical, and may extend so as to form an acute angle or an obtuse angle with respect to the gas inlet side, or the partition itself is formed in a curved surface shape. May be. Further, the partition portion is not limited to a plate shape, and may have various shapes including portions having different thicknesses.
The space forming body can be formed in various shapes, and various combinations of the positions and the number of gas inlets and gas outlets are possible.
[0036]
【Example】
Example 1: The size and arrangement of the through holes provided in the partition part The arrangement ratio of the total opening area of the through holes to the total area opposed to the gas inflow direction in a plate-like member having a thickness of 3 mm is substantially constant. As shown, Samples 1 to 9 were prepared by changing the inner diameter of the through-holes and the center-to-center distance between the through-holes. For each of the samples 1 to 9, a gas flow was passed under the same conditions, and the oil collection efficiency and pressure loss were measured.
As the gas flow, air containing oil particles at about 0.8 g / h was used, and the gas was caused to collide perpendicularly to the plate surface of the partition at a flow rate of about 6 m / s.
The thickness of the partition was 3 mm.
The results of measuring the oil collection efficiency and pressure loss of these samples 1 to 9 are shown in FIGS. 8 and 10.
[0037]
According to this result, by comparing Samples 3 and 8 and Samples 6 and 7, which have the same center-to-center distance of the holes, when the center-to-center distances of the holes are the same, the smaller the inner diameter of the through hole, the more the oil It was found that the particles could be collected well. On the other hand, the pressure loss is small in Samples 6, 8, and 9 in which the distance between the centers of the holes is less than twice the inner diameter of the holes, and particularly in Samples 7 to 9 in which the distance between the centers of the holes is less than twice the inner diameter of the holes. , Especially about 40 Pa. From these facts, the partition portions (samples 1, 3, 6, 8, 9) provided with through holes so as to have an inner diameter of 2 to 3 mm and a distance between the centers of the holes of 4.2 mm ± 1 mm increase the pressure loss. It was clarified that the oil collection rate was good in a state in which was suppressed. Further, in a partition portion (samples 6, 8, and 9) having an inner diameter of 2 to 3 mm and a through-hole provided so that the center-to-center distance of the hole is equal to or less than twice the inner diameter, an increase in pressure loss is favorably suppressed. It was found that the oil collection rate could be kept good.
[0038]
Example 2: A trapping portion having a projecting portion and having a plate thickness of 3 mm, through holes having an inner diameter of 4 mm are formed at regular intervals so that the center-to-center distance of the holes is 8.4 mm, and the opening ends of the through holes are formed. Along with this, an annular protrusion having a thickness of 1 mm and a width of 1 mm protruding in one direction was provided, and a sample 10 was obtained. For Sample 10, the same gas flow as in Example 1 was passed to measure the oil collection efficiency and the pressure loss.
Further, a comparative sample having the same through-hole and having no protrusion was prepared, and the same measurement was performed.
These results are shown in FIG.
[0039]
From this result, although the pressure loss is hardly changed between the sample 10 having the protruding portion and the comparative sample, in the sample 10, the oil collection rate is improved by about 13%. From this, it has been clarified that the provision of the protrusion protruding in the gas inflow direction at the opening edge of the through-hole can reduce the increase in pressure loss and collect more oil.
[0040]
【The invention's effect】
In the present invention, by suppressing the pressure loss, by providing an oil particle collecting device capable of efficiently collecting oil particles, a decrease in engine efficiency due to an increase in the pressure of blow-by gas is reduced, It is possible to provide an oil particle collecting device for blow-by gas and the like in which oil particles are efficiently collected and the amount of collected oil particles is improved.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view showing an oil particle collecting device according to a first embodiment of the present invention.
FIG. 2 is a plan view of a collecting unit provided in the oil particle collecting device of FIG.
FIG. 3 is a schematic sectional view showing an oil particle collecting device according to a second embodiment of the present invention.
FIG. 4 is a perspective view of a collecting portion provided in the oil particle collecting device of FIG.
FIG. 5 is a perspective view showing a modified example of the collecting unit of FIG. 3;
FIG. 6 is a perspective view showing a modified example of the collecting unit of FIG. 3;
FIG. 7 is a perspective view showing a modified example of the collecting unit of FIG. 3;
FIG. 8 is a table showing the inner diameter of holes and the distance between the centers of holes in each sample of Example 1.
FIG. 9 is a table showing the oil collection rate and pressure loss of each sample of Example 1.
FIG. 10 is a graph showing the measurement results of Example 1.
FIG. 11 is a table showing an oil collection rate and a pressure loss in Example 2.
FIG. 12 is a sectional view showing an example of a conventional oil particle collecting device.
[Explanation of symbols]
1,31 Oil particle collecting device 3 Space forming body 4 Concave portion 5 Baffle plate 3a Bottom surface 3b Upper surface 6,7 Gas inlet 9 Gas outlet 11,12 Oil outlet 20,21,22,24,25,33, 34 partitioning parts 27, 36 collecting parts 29, 38, 51, 54, 56, 64 through-holes 40, 52, 55, 57 projecting part 60 partitioning plate 62 gas passage

Claims (4)

A gas inlet, a gas outlet, and a space forming body that forms a space through which a gas including an oil outlet can flow,
A plurality of partitions that partially block the space between the gas inlet and the gas outlet of the space forming body,
At least one of the plurality of partition portions includes an oil particle catching portion provided with a collecting portion in which a plurality of through holes having an inner diameter of 2 mm or more and 3 mm or less are arranged so that a center-to-center distance is 3 mm or more and 6 mm or less. Collector. A gas inlet, a gas outlet, and a space forming body that forms a space through which a gas including an oil outlet can flow,
A plurality of partitions that partially block the space between the gas inlet and the gas outlet of the space forming body,
An oil particle collecting device, wherein at least one of the plurality of partition portions includes a collecting portion having a plurality of through holes formed with an open end protruding toward a gas inlet side. The oil particle collecting device according to claim 1, wherein an opening end of the through hole projects toward a gas inlet. The oil particle collecting device according to claim 2, wherein the projecting portions of the opening ends of the plurality of through holes are formed apart from each other.

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