WO2022050312A1

WO2022050312A1 - Lubricating oil micronization prevention device

Info

Publication number: WO2022050312A1
Application number: PCT/JP2021/032129
Authority: WO
Inventors: 耕陽三枝
Original assignee: いすゞ自動車株式会社
Priority date: 2020-09-01
Filing date: 2021-09-01
Publication date: 2022-03-10
Also published as: JP2022041371A

Abstract

A lubricating oil micronization prevention device 10 of a rotating machine 1 includes: a rotating shaft 5 that protrudes outward from a housing 3; a drive gear 4 that is fixed to one protruding end of the rotating shaft 5; and a bearing 6 that rotatably supports the rotating shaft 6, with a plurality of window holes 7 being formed in the bearing 6. A drive gear stop plate 11 is provided disposed between the bearing 6 and the drive gear 4 so as to face the bearing 6 in an X-direction. The drive gear stop plate 11 overhangs outward from an insertion hole 13 into which the rotating shaft 5 is inserted so as to cover target window holes 7a, which exclude, of the plurality of window holes 7, some of the window holes 7 that are disposed on the lower side in a Z-direction, as viewed in the X-direction.

Description

Lubricating oil atomization prevention device

The present disclosure relates to a lubricating oil atomization prevention device, and more particularly to a lubricating oil atomization prevention device that prevents the lubricating oil discharged from a rotating machine from hitting a gear and atomizing.

A device has been proposed that prevents lubricating oil from adhering to gears and suppresses opportunity loss (see, for example, Patent Document 1). The apparatus described in Patent Document 1 includes a plate covering at least a part of the lower half of the gear between the bearing portion that rotatably supports the drive shaft and the gear, and lubricates the lower half of the gear. Is prevented from adhering.

International Publication No. WO2015 / 033438

By the way, in a rotary machine that is driven by transmitting the driving force of an internal combustion engine to a drive gear, a bearing that rotatably supports a rotary shaft to which the drive gear is fixed at one end is lubricated from the inside of the housing of the rotary machine. In some cases, oil is discharged and a plurality of window holes for sucking air are formed inside the housing. In this type of rotary machine, the lubricating oil discharged from the window hole hits a plurality of teeth of the rotating drive gear and is splashed upward to be atomized. The finely divided lubricating oil is sucked into a recirculation device installed in the internal combustion engine to recirculate the blow-by gas and stored in the recirculation device. That is, the atomization of the lubricating oil is a factor that increases the consumption of the lubricating oil.

The atomization of the lubricating oil becomes more remarkable when the lubricating oil hits the teeth whose angular velocity is oriented vertically upward on the vertical upper side of the rotating gear. Therefore, the apparatus described in Patent Document 1 that focuses only on the opportunity loss of the drive gear and prevents the lubricating oil from adhering to the lower half of the drive gear can suppress the atomization of the lubricating oil. Can not. As described above, even if the apparatus described in Patent Document 1 is simply used, it is not an effective solution to the increase in the consumption of the lubricating oil due to the atomization of the lubricating oil.

An object of the present disclosure is to provide a lubricating oil atomization prevention device that prevents the atomization of the lubricating oil and suppresses an increase in the consumption of the lubricating oil.

The lubricating oil atomization prevention device of one aspect of the present disclosure that achieves the above object includes a housing, a rotating shaft in which a drive gear is fixed to one end protruding outward from the housing, and one surface of the housing. The bearing is arranged in a bearing to rotatably support the rotary shaft, and the rotary shaft is arranged on the bearing outside the axial radial direction of the rotary shaft at intervals in the circumferential direction of the rotary shaft. This is a lubricating oil atomization prevention device mounted on a rotating machine having a plurality of window holes in which lubricating oil is discharged from the inside of the housing and air is sucked into the inside of the housing. A drive gear blocking plate is further provided between the drive gear and the bearing so as to face the bearing in the axial direction of the rotary shaft, and the drive gear blocking plate is inserted through which the rotary shaft is inserted. It is characterized in that it projects outward from the hole and covers up to the outside of the target window hole except for a part of the window holes arranged on the lower side in the vertical direction among the plurality of window holes.

According to one aspect of the present disclosure, it is possible to prevent the lubricating oil discharged from the window hole by the blocking plate for the driving gear from being atomized by the driving gear and suppress an increase in the consumption of the lubricating oil. can.

FIG. 1 is a perspective view illustrating a rotary machine and a power transmission mechanism in a state where the lubricating oil atomization prevention device of the embodiment is not installed. FIG. 2 is a perspective view illustrating the lubricating oil atomization prevention device of the first embodiment. FIG. 3 is a front view illustrating the front view of the lubricating oil atomization prevention device shown in FIG. 2 in the axial direction. FIG. 4 is a top view illustrating the upper surface of the vertical lower view of the target gear blocking plate shown in FIG. 2. FIG. 5 is a front view illustrating the front view of the lubricating oil atomization prevention device of the second embodiment in the axial direction. FIG. 6 is a perspective view illustrating the lubricating oil atomization prevention device of the third embodiment. FIG. 7 is a front view illustrating the front view of the lubricating oil atomization prevention device shown in FIG. 6 in the axial direction. FIG. 8 is a top view illustrating the upper surface of the vertical lower view of the target gear blocking plate shown in FIG.

Hereinafter, embodiments of the lubricating oil atomization prevention device in the present disclosure will be described. In the figure, the dotted line is a line representing the shape of the part that cannot be seen in the figure, the alternate long and short dash line is a line that specifies the dimension and position, and the alternate long and short dash line is a line that indicates the rotation direction of each gear. Further, the axial direction of the rotating shaft 5 is the X direction, the vertical direction is the Z direction, the direction orthogonal to both the X direction and the Z direction is the Y direction, and the inner and outer sides are the inner side and the outer side in the axial radial direction of the rotating shaft 5. The outside is shown, and the back side and the front side indicate the back side and the front side in the axial direction of the rotating shaft 5. In addition, in order to avoid complication of each gear, a part of the tooth is described in some figures, but the description of the tooth is omitted in the others.

As illustrated in FIG. 1, the rotary machine 1 is a machine that drives rotary power transmitted from a drive source (not shown) by a power transmission mechanism 2. An air compressor and an oil pump are exemplified as the rotary machine 1, a gear mechanism composed of a plurality of gears (8, 9a, 9b) is exemplified as the power transmission mechanism 2, and an internal combustion engine and an electric motor are exemplified as the drive source. Will be done. The rotary machine 1 of the present embodiment uses an internal combustion engine provided with a recirculation device for recirculating blow-by gas as a drive source, and an air compressor driven by transmitting rotational power from the internal combustion engine by a power transmission mechanism 2 composed of a gear mechanism. Is. The rotary machine 1 and the power transmission mechanism 2 are installed on the side surface of an internal combustion engine (not shown). The rotary machine 1 has a housing 3, a drive gear 4, a rotary shaft 5, and a bearing 6, and a plurality of window holes 7 are formed in the bearing 6.

The drive gear 4 is fixed to one end of the rotating shaft 5 protruding toward the front side in the X direction from the housing 3. The outer circumference of the drive gear 4 is larger than the outer circumference of the inner ring 6a of the bearing 6 in the X direction, and the outer peripheral side portion of the drive gear 4 overlaps the plurality of window holes 7 in the X direction.

The bearing 6 is arranged on the surface on which the rotating shaft 5 of the housing 3 protrudes and rotatably supports the rotating shaft 5, and is also called a bearing holder. The bearing 6 is composed of an inner annulus 6a that supports the rotating shaft 5, an outer annulus 6b that is fixed to the housing 3, and a plurality of radial columns 6c that connect the annulus to each other. The window hole 7 is formed in the area surrounded by the ring 6b and the support column 6c.

The plurality of window holes 7 are arranged outside the axial direction of the rotating shaft 5 at intervals in the circumferential direction of the rotating shaft 5, and lubricating oil is discharged from the inside of the housing 3 and air is discharged inside the housing 3. Is a through hole that is sucked in. The number and arrangement positions of the window holes 7 are set based on the amount of lubricating oil discharged and the amount of air sucked in when the rotating shaft 5 of the rotating machine 1 rotates at a preset maximum rotation speed. It is desirable that three or more of them are arranged at equal intervals in the circumferential direction of the rotating shaft 5. In the present embodiment, the six window holes 7 are arranged at equal intervals in the circumferential direction of the rotation shaft 5.

The power transmission mechanism 2 is a gear mechanism composed of a plurality of gears, the transmission gear 8 is a gear that meshes with the drive gear 4, and the

target gears

9a and 9b are gears having a part in the outflow range A described later. .. The arrangement of the plurality of gears constituting the power transmission mechanism 2 is not particularly limited, and some gears do not have a target gear.

The outflow range A indicates the range in which the lubricating oil discharged from the window hole 7 flows down. The height of the outflow range A in the Z direction is the length from the opening end of the window hole 7 located at the upper end of the plurality of window holes 7 in the Z direction to the oil pan (not shown). The width of the outflow range A in the Y direction is the length between the open ends of the window holes 7 located at both ends of the plurality of window holes 7 in the Y direction. In other words, the width of the outflow range A in the Y direction is the inner diameter of the outer annulus 6b of the bearing 6. The depth of the outflow range A in the X direction is the length from the window hole 7 to the front side in the X direction of the drive gear 4, the transmission gear 8, and the

target gears

9a and 9b.

Lubricating oil hits the parts of each gear existing in the outflow range A. Among the parts to which the lubricating oil hits, the parts where the atomization of the hit lubricating oil is more remarkable are the parts B and C. Specifically, the portions B and C indicate the teeth of the portions of the gears existing in the outflow range A in which the direction of the angular velocity on the upper side in the Z direction of each rotating gear is directed to the upper side in the Z direction. In the present disclosure, when the direction of the angular velocity is directed upward in the Z direction, the component of the vector of the angular velocity includes the upper side in the Z direction, the direction of the angular velocity is not only in the vertically upward direction, and the direction of the angular velocity is in the horizontal direction. It also includes the state of tilting from and facing upward in the Z direction. For example, when the gear is rotating counterclockwise, the teeth whose angular velocity is oriented upward in the Z direction are on the upper side in the Z direction of the gear and on the right side of the vertical line passing through the axis in the X direction. When the gear is rotating clockwise, the tooth whose angular velocity is directed upward in the Z direction is on the upper side of the gear in the Z direction and from the vertical line passing through the axis in the X direction. The tooth on the left side.

In the present embodiment, the entire circumference of the drive gear 4 exists in the outflow range A and rotates clockwise, and the transmission gear 8 has a part on the left side in the outflow range A and rotates counterclockwise. Therefore, the portion B of the present embodiment is a tooth existing on the upper left side of the rotating drive gear 4. When the drive gear 4 rotates counterclockwise and the transmission gear 8 rotates clockwise, the portion B is the upper right tooth of the rotating drive gear 4 and the upper left side of the rotating transmission gear 8. It becomes a tooth existing in the outflow range A.

Further, in the present embodiment, the target gear 9a exists in the outflow range A except for a part on the left side and rotates counterclockwise, and the target gear 9b has a part on the left side in the outflow range A and rotates clockwise. It's spinning. Therefore, the portion C of the present embodiment is a tooth existing in the outflow range A of the tooth on the upper right side of the rotating target gear 9a and the tooth on the upper left side of the rotating target gear 9b. When the target gear 9a rotates clockwise and the target gear 9b rotates counterclockwise, the portion C is a tooth existing in the outflow range A of the teeth on the upper left side of the rotating target gear 9a. And the teeth existing in the outflow range A of the teeth on the upper right side of the rotating target gear 9b.

When the rotary machine 1 is driven, the lubricating oil is discharged from the plurality of window holes 7 toward the front side in the X direction, and the discharged lubricating oil flows down in the Z direction. At this time, the lubricating oil discharged from the window hole 7 hits the rotating drive gear 4, and is flipped upward in the Z direction by the teeth of the drive gear 4 to be finely divided. Further, the lubricating oil that has flowed downward hits the target gears 9a and 9b, and is flipped upward in the Z direction by the teeth of the target gears 9a and 9b to be finely divided. In particular, the lubricating oil that hits the portions B and C becomes significantly finer and becomes mist-like. Since the finely divided lubricating oil is recovered by a blow-by gas recirculation device (not shown), the consumption of the lubricating oil increases.

As illustrated in FIGS. 2 and 3, the lubricating oil atomization prevention device 10 of the first embodiment is a device that prevents the lubricating oil atomized from being discharged from the window hole 7 of the rotary machine 1. The drive gear blocking plate 11 and the target gear blocking plate 12 are provided.

The drive gear blocking plate 11 is installed between the bearing 6 and the drive gear 4 so as to face the bearing 6 in the X direction. The drive gear blocking plate 11 of the present embodiment is installed at a distance from the bearing 6 with a predetermined length L1. The predetermined length L1 is set based on the discharge amount of the lubricating oil discharged when the rotation shaft 5 of the rotary machine 1 rotates at a preset maximum rotation speed and the suction amount of the sucked air. The length L1 has a positive correlation with the discharge amount of the lubricating oil and the suction amount of air, and it is desirable to increase the length L1 by that amount as the discharge amount and the suction amount increase.

The drive gear blocking plate 11 is a plate that projects outward from the insertion hole 13 into which the rotating shaft 5 is inserted and covers the target window hole 7a in the X direction, and does not cover at least a part of the target window hole 7a. It has a covering portion 11a, a fixing portion 11b, an insertion hole 13, and a closing piece 14. The drive gear blocking plate 11 is fixed to the bearing 6 by a fixative that fixes the bearing 6 to the housing 3.

In the present disclosure, the target window hole 7a is completely covered with the opening portion of the target window hole 7a by the drive gear blocking plate 11. The target window hole 7a is exposed by the drive gear blocking plate 11 without covering at least a part of the opening portion. The target window hole 7b of the present embodiment is exposed without covering the entire opening portion by the drive gear blocking plate 11.

The target window hole 7a includes at least the window hole 7 that discharges the lubricating oil that hits the portion B of the drive gear 4. The window hole 7 for discharging the lubricating oil corresponding to the portion B is a window hole 7 that overlaps the portion B of the drive gear 4 in the X direction. The target window hole 7a of the present embodiment includes, in addition to the window hole 7 for discharging the lubricating oil corresponding to the portion B, the window hole 7 adjacent to the window hole 7 in the circumferential direction of the rotation shaft 5.

The target window hole 7a includes at least the window hole 7 located on the lowermost side in the Z direction among the plurality of window holes 7. The target window hole 7a of the present embodiment includes the window hole 7 located farthest in the Z direction and the window hole 7 most distant from the portion B.

It is desirable that the number of the target window holes 7a is two-thirds or more of the number of the plurality of window holes 7, and the number of the target window holes 7a is one or more. When the number of the target window holes 7a is less than two-thirds of the number of the plurality of window holes 7, the number of the target window holes 7a not covered by the drive gear blocking plate 11 increases, and fine particles of lubricating oil are formed. There is a risk that the conversion will increase. Further, if there is no window hole 7a to be targeted, the passage of the lubricating oil and the air is only a gap between the bearing 6 and the blocking plate 11 for the drive gear, and the discharge of the lubricating oil may be delayed.

In the present embodiment, the target window hole 7a has four window holes 7 including two window holes 7 for discharging the lubricating oil corresponding to the portion B and two window holes 7 adjacent to the window holes 7 in the circumferential direction. Is. The target window hole 7a is two window holes 7 including a window hole 7 located at the lowermost position in the Z direction among the plurality of window holes 7 and a window hole 7 located at a position farthest from the portion B.

The covering portion 11a projects from the insertion hole 13 to the outside of the target window hole 7a and forms an annular fan shape that covers the entire target window hole 7a. In the present disclosure, the outside of the target window hole 7a means the outside of the inner circumference of the outer annulus 6b of the bearing 6. Further, the annular fan shape includes a shape obtained by dividing the annular shape in the radial direction and a shape similar to the shape. Specifically, the covering portion 11a of the present embodiment has an annular shape in which the insertion hole 13 is formed in the center of the outer peripheral circle of the outer annulus 6b of the bearing 6, and the window hole 7a to be targeted is exposed in the axial direction. As shown above, it has a shape cut along the target window hole 7a.

The fixing portion 11b extends from the covering portion 11a to the fixing tool along the support column 6c between the target window holes 7a. The fixing portion 11b is not always necessary when the drive gear blocking plate 11 is fixed to the housing 3 by a fixing tool of another portion.

The block piece 14 is a plate piece that extends along the outer circumference of the upper side of the covering portion 11a in the Z direction in the X direction and closes the gap between the bearing 6 and the drive gear blocking plate 11. In the present embodiment, the closed piece 14 has a configuration in which one plate piece extends over the entire outer circumference of the arc shape on the upper side in the Z direction of the covering portion 11a, but the bearing 6 is fixed to the housing 3. A plurality of plate pieces may be arranged at intervals on the outer periphery of the arc shape on the upper side in the Z direction of the covering portion 11a so as to leave a portion corresponding to the tool. However, it is desirable that the closing piece 14 is configured to close the gap between the bearing 6 and the drive gear blocking plate 11 except for the portion corresponding to the fixture.

When the rotary machine 1 on which the drive gear blocking plate 11 is installed is driven, lubricating oil is discharged from the plurality of window holes 7 toward the front side in the X direction. At this time, the lubricating oil discharged from the target window hole 7a collides with the drive gear blocking plate 11 and does not reach the drive gear 4, and flows downward from the lower portion of the drive gear blocking plate 11 in the Z direction. .. As described above, according to the drive gear blocking plate 11, the lubricating oil is prevented from hitting the portion B of the rotating drive gear 4, so that the discharged lubricating oil hits the drive gear 4 and is atomized. Can be prevented.

Further, the lubricating oil discharged from the target window hole 7a, colliding with the drive gear blocking plate 11 and rebounding collides with the closing piece 14, and the rebounding lubricating oil is also on the lower side of the driving gear blocking plate 11 in the Z direction. It flows down from the part of. As described above, since the drive gear blocking plate 11 has the closing piece 14, the rotating shaft 5 of the rotating machine 1 rotates at the maximum rotation speed, and the amount of lubricating oil discharged from the target window hole 7a is maximized. Even so, it is possible to prevent the lubricating oil from leaking to the outside in the radial direction of the drive gear blocking plate 11.

In addition, the outflow range D of the lubricating oil that flows downward from the lower portion of the drive gear blocking plate 11 in the Z direction is limited to the portion where the blocking piece 14 does not exist, and is wider in the Y direction than the above-mentioned outflow range A. Becomes narrower. In this way, the drive gear blocking plate 11 functions to narrow the outflow range A to the outflow range D, so that the range in which the lubricating oil hits the gear present below can be reduced.

The target gear blocking plate 12 is arranged below the lower end of the drive gear blocking plate 11 in the Z direction and above the target gears 9a and 9b in the Z direction. The target gear blocking plate 12 is a plate having a surface facing the flow of the lubricating oil flowing in the outflow range D, and is composed of a plate separate from the driving gear blocking plate 11. The target gear blocking plate 12 is fixed to the side surface of the internal combustion engine in which the rotary machine 1 and the power transmission mechanism 2 are installed.

The target gear blocking plate 12 is a portion where the lubricating oil that hits the teeth of the target gears 9a and 9b jumps upward in the Z direction among the portions existing in the outflow range D of the target gears 9a and 9b in the Z direction. Cover at least the site containing site C. The target gear blocking plate 12 of the present embodiment includes at least the portion C in the Z direction view and covers the entire region existing in the outflow range D. The target gear blocking plate 12 may have a structure that covers the portion C, but by covering the entire region existing in the outflow range D, it is advantageous to prevent the lubricating oil from being atomized.

As illustrated in FIG. 4, in the target gear blocking plate 12, the rear end 12a in the X direction is arranged behind the target gears 9a and 9b, and the front end 12b is in front of the target gears 9a and 9b. Placed on the side.

When the rotary machine 1 is driven, the lubricating oil flows down from the lower portion of the drive gear blocking plate 11 in the Z direction toward the target gears 9a and 9b within the outflow range D. At this time, the lubricating oil that has flowed down collides with the target gear blocking plate 12 and flows down to the X-direction labor side or the X-direction back side of the target gear blocking plate 12, or other than the parts C of the target gears 9a and 9b. It hits the part. As described above, according to the target gear blocking plate 12, the lubricating oil is prevented from hitting the parts C of the rotating target gears 9a and 9b, so that the lubricating oil that has flowed down hits the target gears 9a and 9b and becomes fine. It can be prevented from being granulated.

As described above, according to the lubricating oil atomization prevention device 10 of the first embodiment, the lubricating oil discharged from the plurality of window holes 7 by the drive gear blocking plate 11 hits the portion B of the drive gear 4. It can be avoided. Further, it is possible to prevent the lubricating oil flowing downward from the lower portion of the drive gear blocking plate 11 in the Z direction by the target gear blocking plate 12 from hitting the portion C of the target gears 9a and 9b. This is advantageous in preventing the lubricating oil from hitting each rotating gear and being atomized, and it is possible to avoid a situation in which the blow-by gas is sucked into the reflux device and stored in the reflux device. can. Along with this, it is possible to suppress an increase in the consumption of the lubricating oil.

Further, according to the lubricating oil atomization prevention device 10, it is possible to adjust the outflow range of the lubricating oil by the blocking plate 11 for the drive gear. Therefore, even if the desired installation space cannot be secured in the area below the rotary machine 1 or around the target gears 9a and 9b, the outflow range A of the lubricating oil is set to the outflow range D in which the target gear blocking plate 12 can be installed. By adjusting, the blocking plate 12 for the target gear can be installed to prevent the lubricating oil from hitting the portion C of the target gears 9a and 9b.

As illustrated in FIG. 5, the lubricating oil atomization prevention device 10 of the second embodiment is different from the first embodiment in the blocking plate 11 for the drive gear. Specifically, the drive gear blocking plate 11 of the second embodiment is configured so that the entire outer circumference thereof is located outside the outer circumference of the drive gear 4.

The drive gear blocking plate 11 of the first embodiment does not cover the entire opening portion of the target window hole 7b, but exposes the entire opening portion of the target window hole 7b in the X direction. On the other hand, the drive gear blocking plate 11 of the second embodiment covers the inner portion of the opening portion of the target window hole 7b by locating the entire outer circumference thereof outside the outer circumference of the drive gear 4.

As described above, the drive gear blocking plate 11 is configured so that the entire outer circumference thereof is located outside the outer circumference of the drive gear 4, so that the lubricating oil discharged from the plurality of window holes 7 is discharged from the drive gear 4. It is advantageous to avoid hitting.

As illustrated in FIGS. 6 and 7, the lubricating oil atomization prevention device 10 of the third embodiment is different from the first embodiment in that it includes a second drive gear blocking plate 15. Further, it is different from the first embodiment in that the target gear blocking plate 12 is supported by the second drive gear blocking plate 15.

The lubricating oil atomization prevention device 10 of the third embodiment is a device that prevents the lubricating oil spouted from the window hole 7 of the rotary machine 1 from being atomized, and is a device for preventing the driving gear blocking plate 11 and the target gear. It is configured to include a plate 12, a blocking plate 15 for a second drive gear, and a connecting piece 16.

The drive gear blocking plate 11 is installed between the bearing 6 and the drive gear 4 so as to face the bearing 6 in the X direction. The drive gear blocking plate 11 of the present embodiment is installed so as to be substantially in contact with the bearing 6. In the present disclosure, "substantial contact" is not a state in which the target window hole 7a is completely closed and the lubricating oil is not discharged from the target window hole 7a, but a state in which the lubricating oil is discharged from the target window hole 7a.

Similar to the second embodiment, the drive gear blocking plate 11 projects outward from the insertion hole 13 into which the rotation shaft 5 is inserted in the X direction to cover the target window hole 7a, and the opening portion of the target window hole 7a. It is a board that does not cover a part of. The drive gear blocking plate 11 has a covering portion 11a and an insertion hole 13, and unlike the first embodiment, does not have a fixing portion 11b and a closing piece 14. The drive gear blocking plate 11 is fixed to the bearing 6 together with the second drive gear blocking plate 15 described later by a fixing tool for fixing the bearing 6 to the housing 3.

The target window hole 7a of the present embodiment includes a window hole 7 that discharges the lubricating oil that hits the transmission gear 8 in addition to the window hole 7 that discharges the lubricating oil that hits the portion B. The target window holes 7a are four window holes 7 including two window holes 7 for discharging the lubricating oil corresponding to the portion B and two window holes 7 for discharging the lubricating oil corresponding to the transmission gear 8. Further, the target window hole 7a includes a window hole 7 located on the lowermost side in the Z direction, and a window hole 7 adjacent to the window hole 7 in the circumferential direction.

Similar to the second embodiment, the covering portion 11a has an annular fan shape that projects from the insertion hole 13 to the outside of the target window hole 7a and covers the entire target window hole 7a, and the outer periphery thereof is from the outer periphery of the drive gear 4. Is also located on the outside.

The second drive gear blocking plate 15 is installed at a distance from the drive gear blocking plate 11 in the X direction, and is a portion of the target window hole 7b that is not covered by the driving gear blocking plate 11 in the X direction. It is a plate that covers. The blocking plate 15 for the second drive gear has an annular fan shape. Specifically, the second drive gear blocking plate 15 of the present embodiment has an annular shape with the outer peripheral circle of the outer ring 6b of the bearing 6 as the outer circumference, and the outer portion of the window hole 7a to be targeted in the axial direction. It has a shape cut along the target window hole 7a so as to cover the object. It is preferable that the arcuate inner circumference inside the second drive gear blocking plate 15 overlaps the portion of the drive gear blocking plate 11 that covers the inside of the target window hole 7a.

When the rotary machine 1 is driven, lubricating oil is discharged from the plurality of window holes 7 toward the front side in the X direction. At this time, the lubricating oil discharged from the target window hole 7a collides with the drive gear blocking plate 11 and does not reach the drive gear 4, and flows downward from the lower portion of the drive gear blocking plate 11 in the Z direction. .. As described above, according to the drive gear blocking plate 11, the lubricating oil is prevented from hitting the portion B of the rotating drive gear 4, so that the discharged lubricating oil hits the drive gear 4 and is atomized. Can be prevented. Further, it is also possible to prevent the lubricating oil from hitting the rotating transmission gear 8, which is advantageous in preventing the lubricating oil from being atomized.

Further, the lubricating oil discharged from the target window hole 7a collides with the second drive gear blocking plate 15 and flows downward from the lower portion of the drive gear blocking plate 11 in the Z direction. As a result, the outflow range E of the lubricating oil that flows downward from the lower portion of the drive gear blocking plate 11 in the Z direction has a narrower depth in the X direction than the above-mentioned outflow range A. In addition, the outflow range E of the lubricating oil that flows downward from the lower portion of the drive gear blocking plate 11 in the Z direction has a narrower width in the Y direction than the above-mentioned outflow range A. As described above, both the drive gear blocking plate 11 and the second drive gear blocking plate 15 are provided, and the outflow range A is set to the outflow range E by combining not only the width in the Y direction but also the depth in the X direction. By functioning to narrow the gear, it is possible to reduce the range in which the lubricating oil hits the gears existing below.

Similar to the first embodiment, the target gear blocking plate 12 is arranged below the lower end of the drive gear blocking plate 11 in the Z direction and above the target gears 9a and 9b in the Z direction. The target gear blocking plate 12 is a plate having a surface facing the flow of the lubricating oil flowing in the outflow range E, and is supported by the second drive gear blocking plate 15 via the connecting piece 16 to provide a second. It is integrally configured with the drive gear blocking plate 15.

The target gear blocking plate 12 is a portion where the lubricating oil that hits the teeth of the target gears 9a and 9b jumps upward in the Z direction among the portions existing in the outflow range E of the target gears 9a and 9b in the Z direction. Cover at least the site containing site C. The target gear blocking plate 12 of the present embodiment includes a portion where the outflow range E and the portion C overlap in the Z direction, and covers the inner side of the portion.

The upper end of the connection piece 16 in the Z direction is joined to the second drive gear blocking plate 15, and the lower end in the Z direction is connected to the labor side end of the target gear blocking plate 12 in the X direction.

As illustrated in FIG. 8, the back end 12a of the target gear blocking plate 12 in the X direction is arranged on the back side in the X direction of the target gears 9a and 9b.

When the rotary machine 1 is driven, the lubricating oil flows down from the lower portion of the drive gear blocking plate 11 in the Z direction toward the target gears 9a and 9b within the outflow range E. At this time, the lubricating oil that has flowed down collides with the target gear blocking plate 12 and flows down to the back side of the target gear blocking plate 12 in the X direction, or hits a portion other than the portion C of the target gears 9a and 9b. As described above, according to the target gear blocking plate 12, the lubricating oil is prevented from hitting the parts C of the rotating target gears 9a and 9b, so that the lubricating oil that has flowed down hits the target gears 9a and 9b and becomes fine. It can be prevented from being granulated.

As described above, according to the lubricating oil atomization prevention device 10 of the third embodiment, the lubricating oil discharged from the plurality of window holes 7 by the drive gear blocking plate 11 hits the portion B of the drive gear 4. It can be avoided. Further, it is possible to prevent the lubricating oil flowing downward from the lower portion of the drive gear blocking plate 11 in the Z direction by the target gear blocking plate 12 from hitting the portion C of the target gears 9a and 9b. This is advantageous in preventing the lubricating oil from hitting each rotating gear and being atomized, and it is possible to avoid a situation in which the blow-by gas is sucked into the reflux device and stored in the reflux device. can. Along with this, it is possible to suppress an increase in the consumption of the lubricating oil.

Further, according to the lubricating oil atomization prevention device 10 of the third embodiment, it is possible to adjust the outflow range of the lubricating oil by the drive gear blocking plate 11 and the second drive gear blocking plate 15. .. Therefore, even if the desired installation space cannot be secured in the area below the rotary machine 1 or around the target gears 9a and 9b, the outflow range A of the lubricating oil is set to the outflow range E in which the target gear blocking plate 12 can be installed. By adjusting, the blocking plate 12 for the target gear can be installed to prevent the lubricating oil from hitting the portion C of the target gears 9a and 9b.

This application is based on a Japanese patent application (Japanese Patent Application No. 2020-146527) filed on September 1, 2020, the contents of which are incorporated herein by reference.

The present disclosure exhibits hardening in which the lubricating oil discharged from the rotary machine hits the gears and can be prevented from being granulated, and particularly the rotary machine driven by transmitting the driving force of the internal combustion engine to the drive gears. It is useful in that it can suppress an increase in the consumption of lubricating oil.

1 Rotating machine 2 Power transmission mechanism 3 Housing 4 Drive gear 5 Rotating shaft 6 Bearing 7 Window hole 7a Target window hole 7b Target window hole 10 Lubricating oil atomization prevention device 11 Driving gear blocking plate 12 Target gear blocking plate 13 Insertion hole 14 Closure piece 15 Blocking plate for the second drive gear 16 Connection piece

Claims

With the housing
The rotating shaft protruding outward from the housing and
The drive gear fixed to the protruding end of the rotating shaft,
The rotating shaft of the housing is arranged on a protruding surface and has a support bearing so that the rotating shaft can rotate.
In the rotating shaft, a plurality of window holes in which lubricating oil is discharged from the inside of the housing to the bearing and air is sucked into the housing are formed on the outer side of the rotating shaft in the axial direction of the rotating shaft. It is a lubricating oil atomization prevention device mounted on a rotating machine arranged at intervals in the direction, and faces the bearing in the axial direction of the rotating shaft between the bearing and the driving gear. Equipped with a blocking plate for drive gears installed
The drive gear blocking plate projects outward from the insertion hole through which the rotary shaft is inserted, and is a part of the plurality of window holes arranged vertically downward in the axial view of the rotary shaft. Lubricating oil atomization prevention device characterized by covering the target window hole excluding the window hole.
The lubricating oil atomization prevention device according to claim 1, wherein the target window hole includes at least a window hole in which the discharged lubricating oil from the plurality of window holes hits the teeth of the drive gear and jumps vertically upward.
The lubricating oil atomization prevention device according to claim 1 or 2, wherein the entire outer circumference of the drive gear blocking plate is located outside the outer circumference of the drive gear.
The lubricating oil fineness according to any one of claims 1 to 3, wherein the drive gear blocking plate projects from the insertion hole to the outside of the target window hole and forms an annular fan shape that covers the entire target window hole. Granulation prevention device.
The drive gear blocking plate is installed away from the bearing and extends along the outer arcuate outer circumference of the annular fan shape between the bearing and the drive gear blocking plate. The lubricating oil atomization prevention device according to claim 4, which has a block piece that closes the gap.
At least one of a plurality of gears of the power transmission mechanism for transmitting power from the drive source to the drive gear, and above the target gear arranged in the outflow range of the lubricating oil discharged from the plurality of window holes. Equipped with a blocking plate for the target gear placed in
The claim that the blocking plate for a target gear covers at least a portion of a portion existing in the outflow range of the target gear in a vertical direction in which the lubricating oil that hits the tooth of the target gear jumps vertically upward. The lubricating oil atomization prevention device according to any one of 1 to 5.
The sixth aspect of the target gear blocking plate is that the rear end of the rotating shaft in the axial direction is arranged on the back side of the target gear and the front end is arranged on the front side of the target gear. The lubricating oil atomization prevention device described.
A second drive gear blocking plate that is installed at a distance from the drive gear blocking plate in the axial direction of the rotating shaft and covers a portion that is not covered by the driving gear blocking plate in the axial direction. The lubricating oil atomization prevention device according to any one of claims 1 to 5.
At least one of a plurality of gears of the power transmission mechanism for transmitting power from the drive source to the drive gear, and above the target gear arranged in the outflow range of the lubricating oil discharged from the plurality of window holes. Equipped with a blocking plate for the target gear placed in
The target gear blocking plate is the rotation shaft of a portion including at least a portion of a portion existing in the outflow range of the target gear in a vertical direction in which the lubricating oil that hits the teeth of the target gear splashes vertically upward. The lubricating oil atomization prevention device according to claim 8, which covers the inner side of the shaft in the axial direction.
The target gear blocking plate is supported by the second drive gear blocking plate via a connecting piece.
The upper end of the connection piece is joined to the second drive gear blocking plate, and the lower end is connected to the labor side end of the target gear blocking plate in the axial direction of the rotating shaft of the target gear blocking plate. The lubricating oil atomization prevention device according to claim 9, wherein the back end in the axial direction is arranged on the back side of the target gear.