Oil mist removal device

Abstract

To provide an oil mist removal device capable of improving maintainability of a collection disc.SOLUTION: An oil mist removal device 1 comprises: a device body 2 that is formed in a cylinder shape extending from one side to the other side in an axial direction, and has an opening portion 2R on an end surface of the other side in the axial direction; a motor 3 that is provided inside the device body 2; a suction fan 4 that is provided inside the device body 2, is driven by the motor 3 to rotate around an axis, and circulates air sucked from the outside to the inside of the device body 2 from one side to the other side in the axial direction; and a collection disc 6 that is disposed on the other side in the axial direction on the downstream side in a circulating direction of the air than the motor 3 and the suction fan 4 inside the device body 2, is provided inside the device body 2 while being attachable / detachable through the opening portion 2R, is driven by the motor 3 to rotate around the axis, and separates oil mist included in the air.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an oil mist removal device that collects and removes oil mist contained in the air. [Background technology]

[0002] For example, the oil mist removal device described in Patent Document 1 is equipped with a disk (rotating disc) that captures and removes oil mist from dust-laden airflow such as oily smoke generated inside a machine tool. The oil mist in the airflow collides with slits (mesh) in the disk, where it is repelled (separated) and collected. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-138186 Summary of the Invention [Problem to be solved by the invention]

[0004] In the oil mist removal device described above, the oil mist collection performance deteriorates over time as oil mist aggregates and dirt adhere to the disk. To maintain this collection performance, regular maintenance of the disk is essential. However, in the oil mist removal device described in Patent Document 1, disk maintenance could only be performed by removing the intake duct from the intake pipe, removing the front cover secured with screws, and then removing the suction fan and rectifier plate. This resulted in a problem of disk maintenance requiring a lot of labor (effort) and poor maintainability (work efficiency).

[0005] SUMMARY OF THE INVENTION In consideration of the above circumstances, the present invention provides an oil mist removing device that can improve the maintainability of the collecting disk. [Means for solving the problem]

[0006] The first oil mist removal device of the present invention comprises: a device main body formed in a cylindrical shape extending from one end in an axial direction to the other end, and having an opening at the other end face in the axial direction; a motor provided inside the device main body; a suction fan provided inside the device main body and driven to rotate about its axis by the motor, and circulating air drawn into the device main body from the outside from one end in the axial direction to the other; and a collecting disk located inside the device main body on the other end in the axial direction downstream of the motor and the suction fan in the air flow direction, provided inside the device main body in a detachable state through the opening, and driven to rotate about its axis by the motor, and separating oil mist contained in the air.

[0007] In the first oil mist removal device of the present invention, the collecting disk is located on the other axial side downstream of the motor and suction fan in the air flow direction. With this configuration, a worker performing maintenance on the collecting disk can easily access the collecting disk through an opening on the other axial end face of the device body. This makes it possible to easily attach and detach the collecting disk through the opening, improving the ease of maintenance of the collecting disk.

[0008] A second oil mist removal device of the present invention may be the first oil mist removal device described above, wherein the collecting disk faces the other end face in the axial direction of the device body that forms the opening in a position parallel to the other end face.

[0009] According to the second oil mist removing device of the present invention, the collecting disk faces the opening (opening surface) in parallel, which improves the ease of access to the collecting disk and the ease of attachment and detachment work.

[0010] A third oil mist removal device of the present invention is the first or second oil mist removal device described above, wherein the device body is arranged in an orientation in which the axial direction is horizontal, and the motor is arranged on one side of the axial direction that is upstream of the suction fan in the flow direction, with the rotation shaft extending from the upstream side to the downstream side in the flow direction.

[0011] According to the third oil mist removal device of the present invention, the device body is extended horizontally, and the motor, suction fan, and collection disk are arranged side by side, so the height of the oil mist removal device can be lowered compared to if the device body were extended vertically.

[0012] A fourth oil mist removal device of the present invention is any of the first to third oil mist removal devices described above, further comprising a straightening plate provided inside the device body for straightening the air flow so as to direct it in the axial direction, and the motor, suction fan, straightening plate and collecting disk may be arranged side by side in this order from the upstream side to the downstream side in the flow direction.

[0013] In a fourth oil mist removal device of the present invention, a motor, a suction fan, a straightening plate, and a collecting disk are arranged in this order from upstream to downstream in the flow direction. A portion of the oil mist contained in the air is primarily collected by the suction fan, and any oil mist not primarily collected by the suction fan is secondarily collected by the collecting disk. The air discharged from the suction fan flows in the rotational direction of the suction fan, but is straightened by the straightening plate to flow in the axial direction. With this configuration, the flow direction (axial direction) of the air containing oil mist intersects with the rotational direction of the collecting disk, making it easier for the rotating collecting disk to collide with the oil mist, thereby efficiently repelling the oil mist. This improves the oil mist collection efficiency. Furthermore, because the motor is located at the most upstream side in the flow direction, the air flow is not obstructed, allowing the air to flow smoothly downstream.

[0014] A fifth oil mist removal device of the present invention is any of the first to fourth oil mist removal devices described above, further comprising a flange coupling rotatably supported by a bearing provided inside the device body, connected to a rotating shaft of the motor, and rotating around the axis together with the rotating shaft, and the collecting disk may be connected to a tip of the flange coupling which is downstream of the bearing in the flow direction.

[0015] According to the fifth oil mist removal device of the present invention, the rotating shaft journaled by the motor is rotatably supported by the bearing via a flange coupling, ensuring stable rotation of the rotating shaft without runout, thereby stabilizing the rotation of the collecting disc.

[0016] A sixth oil mist removal device of the present invention may be the fifth oil mist removal device described above, further comprising: a straightening plate fixed inside the device body between the suction fan and the collecting disk to straighten the air flow so as to direct it in the axial direction; and a bearing holder fixed to the straightening plate to hold the bearing portion that supports the flange coupling.

[0017] In a sixth oil mist removal device of the present invention, the bearing holder is fixed to the device body via a straightening plate, and the bearing is interposed between the bearing holder and the flange coupling. With this configuration, the rotating shaft and flange coupling form a single shaft that is installed between the motor and the bearing and supported at two points on both sides in the axial direction, thereby suppressing vibration of the rotating shaft.

[0018] A seventh oil mist removal device of the present invention is any of the first to sixth oil mist removal devices described above, wherein the collecting disk has a pair of disk portions facing each other in the axial direction, and a slit plate sandwiched between the pair of disk portions and having a plurality of slits therein, and the slit plate may be formed so as to be separable into a plurality of divided plates.

[0019] According to the seventh oil mist removal device of the present invention, the collecting disk has a structure in which a slit plate is sandwiched between a pair of disks, thereby improving the strength (rigidity) of the collecting disk compared to a collecting disk composed only of a slit plate. Furthermore, because the slit plate can be divided into multiple divided plates, manufacturing costs, such as mold costs and material costs, can be reduced compared to manufacturing a single large slit plate. Furthermore, if the slit plate (divided plate) is replaceable, even if one divided plate is damaged, only the damaged divided plate needs to be replaced, thereby reducing replacement costs compared to replacing the entire slit plate. As described above, by forming the slit plate from multiple divided plates, it is possible to reduce initial costs and running costs, resulting in an economical collecting disk. Furthermore, the slits can be easily formed using known processing techniques such as etching.

[0020] An eighth oil mist removal device of the present invention may be any of the first to seventh oil mist removal devices described above, further comprising a cover that is detachably attached to the opening of the device body, and an exhaust muffler that is fixed to the upstream surface of the cover in the flow direction, is positioned downstream of the collecting disk in the flow direction, and reduces exhaust noise.

[0021] According to the eighth oil mist removal device of the present invention, the noise generated during operation can be reduced by the exhaust muffler. In addition, the exhaust muffler is fixed to the cover, and the collection disk faces the opening with the exhaust muffler in between, so that the exhaust muffler can be removed together with the cover by removing it from the device body, thereby improving accessibility and ease of maintenance of the collection disk.

[0022] A ninth oil mist removal device of the present invention is the above-mentioned eighth oil mist removal device, further comprising an exhaust section provided on the circumferential surface of the device body at a position facing the exhaust muffler, for discharging the air sucked into the inside of the device body to the outside, wherein the exhaust muffler is funnel-shaped and gradually reduces in diameter from the upstream side to the downstream side in the flow direction, and an area of ​​the exhaust muffler on the side of the exhaust section is shielded, and a plurality of exhaust holes may be drilled in an area of ​​the exhaust muffler on the opposite side to the exhaust section.

[0023] In the ninth oil mist removal device of the present invention, the shortest path connecting the exhaust hole of the exhaust muffler and the exhaust section is blocked, so that clean air from which oil mist has been removed flows from the inside of the exhaust muffler through the exhaust hole into the space between the exhaust muffler and the device body, bypassing the outer periphery of the exhaust muffler and being released from the exhaust section to the outside of the device body. By exhausting clean air in this indirect route, noise generated during exhaust can be effectively reduced. Furthermore, because the exhaust muffler is tapered and its outer periphery is inclined, a wide space can be secured between the outer periphery of the exhaust muffler and the inner periphery of the device body, ensuring a sufficient flow rate (air volume) of clean air.

[0024] The tenth oil mist removal device of the present invention may be any of the first to ninth oil mist removal devices described above, further comprising: a waste oil section that is provided below the suction fan and the collecting disk at the bottom of the device body, which is arranged with the axial direction horizontal, with a waste oil space between them, and that discharges the collected oil mist to the outside; and a windbreak that closes off a part of the space between the suction fan and the collecting disk in the waste oil space.

[0025] According to the tenth oil mist removal device of the present invention, by providing a windbreak, the exhaust (exhaust oil) from the suction fan side is prevented from flowing around to the collecting disc side, and the oil mist collected by the collecting disc can be dropped into the waste oil section.

[0026] An eleventh oil mist removal device of the present invention is the above-mentioned tenth oil mist removal device, wherein the waste oil section has a waste oil port for discharging the oil mist to the outside of the device body, which is provided downstream of the suction fan in the flow direction, and the wind deflector is inclined downward toward the waste oil port.

[0027] According to the eleventh oil mist removal device of the present invention, a positive pressure oil drainage system can be used in which the wind force of the suction fan acts on the waste oil (oil mist) and pushes the waste oil toward the oil drain port. Furthermore, because the windbreak is sloped downward toward the oil drain port, the oil mist captured by the collection disk can be guided toward the oil drain port. This prevents the waste oil (oil mist) from accumulating in the oil drain port, allowing for smooth oil drainage.

[0028] A twelfth oil mist removal device of the present invention is any one of the first to eleventh oil mist removal devices described above, wherein the device main body is arranged in an attitude in which the axial direction is horizontal, the motor is arranged upstream of the suction fan in the flow direction, an inlet passage is formed on the upstream side of the device main body in the flow direction to guide the air taken into the device main body toward the suction fan, and a partition plate is provided to separate the inlet passage from a space in which the motor is arranged, and an inspection door is provided on the periphery of the device main body to open the inlet passage, and ventilation holes are drilled to take in outside air into the space in which the motor is arranged.

[0029] According to the twelfth oil mist removal device of the present invention, the motor, inspection door, and ventilation openings are all located upstream in the flow direction of the device body, which makes it possible to effectively utilize the space around the motor and reduce the size of the oil mist removal device. Also, since relatively large objects to be sucked in, such as chips, can accumulate in the introduction path, providing an inspection door makes it easy to remove the chips.

[0030] The oil mist removal device of the present invention comprises a device main body formed in a cylindrical shape extending from one side in an axial direction to the other side, disposed in an attitude in which the axial direction is a horizontal direction, and having an opening at an end surface on the other side in the axial direction, an intake part provided on one side of the device main body in the axial direction and taking in air from the outside of the device main body to the inside, a motor provided inside the device main body, and a motor disposed inside the device main body on the other side in the axial direction than the motor, which is driven to rotate around its axis by the motor, and which sucks the air from the intake part into the device main body and circulates the air from one side in the axial direction to the other side. and separates the oil mist contained in the air; a collecting disk that is disposed inside the device body on the other side of the axial direction from the suction fan, is disposed inside the device body in a state that it can be attached and detached through the opening, is driven to rotate around its axis by the motor, and separates the oil mist that could not be separated by the suction fan from the air; and an exhaust section that is disposed on the other side of the device body in the axial direction and exhausts the air that has passed through the collecting disk and from which the oil mist has been separated from the air from the inside of the device body to the outside.

[0031] In the oil mist removal device of the present invention, the device body is installed horizontally, with the motor, suction fan, and collection disk arranged side by side in this order from upstream to downstream in the flow direction. This configuration allows the height of the oil mist removal device to be lower than if the device body were installed vertically. Furthermore, some of the oil mist contained in the air can be separated (collected) by the suction fan, and oil mist that cannot be separated by the suction fan can be separated (collected) by the collection disk. This improves the oil mist collection efficiency. Furthermore, because the motor is installed at the most upstream side in the flow direction, the air flow is not obstructed, allowing the air to flow smoothly downstream. [Effects of the Invention]

[0032] According to the present invention, the maintenance of the collection disk can be improved. [Brief explanation of the drawings]

[0033] [Figure 1] 1 is a perspective view showing the diagonally upper side of an oil mist removing device according to an embodiment of the present invention. FIG. [Figure 2] 1 is a perspective view showing the diagonally lower side of an oil mist removing device according to an embodiment of the present invention. FIG. [Figure 3] 1 is a side cross-sectional view showing an oil mist removing device according to an embodiment of the present invention. [Figure 4] 1 is a perspective view of an oil mist removal device according to an embodiment of the present invention, showing a state in which an exhaust muffler and a rear cover have been removed. FIG. [Figure 5] 1 is a perspective view of an oil mist removing device according to an embodiment of the present invention, showing a state in which a collecting disk has been removed. FIG. [Figure 6] 1 is an exploded perspective view showing components of an oil mist removing device according to an embodiment of the present invention. FIG. [Figure 7] 1 is a perspective view showing components of an oil mist removing device according to an embodiment of the present invention. FIG. [Figure 8] 1 is an exploded perspective view showing a collecting disk of an oil mist removing device according to an embodiment of the present invention. FIG. [Figure 9] 1A and 1B are three-view diagrams showing an exhaust muffler of an oil mist removal device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0034] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Note that Fr, Rr, L, R, U, and D shown in the drawings represent front, rear, left, right, top, and bottom. The front-to-back direction (an example of an axial direction), left-to-right direction, and top-to-bottom direction are perpendicular to one another. Terms indicating directions and positions are used in this specification, but these terms are used for convenience of explanation and do not limit the technical scope of the present invention.

[0035] [Configuration of oil mist removal device] An oil mist removing device 1 according to this embodiment will be described with reference to Figures 1 to 9. Figure 1 is a perspective view showing the diagonally upper side of the oil mist removing device 1. Figure 2 is a perspective view showing the diagonally lower side of the oil mist removing device 1. Figure 3 is a side cross-sectional view showing the oil mist removing device 1. Figure 4 is a perspective view showing the state where the exhaust muffler 7 and rear cover 20 have been removed. Figure 5 is a perspective view showing the state where the trapping disc 6 has been removed. Figure 6 is an exploded perspective view showing the components of the oil mist removing device 1. Figure 7 is a perspective view showing the components of the oil mist removing device 1. Figure 8 is an exploded perspective view showing the trapping disc 6. Figure 9 is a three-view view showing the exhaust muffler 7.

[0036] 1 and 2, the oil mist removal device 1 is formed in a generally cylindrical shape with its overall axial direction oriented horizontally (front-to-back direction). The oil mist removal device 1 is connected (not shown), for example, to a machine tool (oil mist source) that generates oil mist during operation. The oil mist removal device 1 sucks in the oil mist generated from the machine tool together with air, collects and removes the oil mist contained in the air, and releases the clean air from which the oil mist has been removed into the outside air.

[0037] As shown in Figure 3, the oil mist removal device 1 includes a device main body 2, a motor 3, a suction fan 4, a straightening vane 5, a collection disk 6, an exhaust muffler 7, and a waste oil section 8. In this specification, the term "flow direction" refers to the direction in which air flows. Furthermore, the terms "upstream" and "downstream" and similar terms refer to "upstream" and "downstream" in the air flow direction and similar concepts.

[0038] <Device body> As shown in Figures 1 to 3, the device body 2 is formed in a cylindrical shape extending from one end in the axial direction to the other, and is disposed in an orientation in which the axial direction is the horizontal direction (front-to-back direction). A pair of legs 10 are attached to the underside of the device body 2, spaced apart in the front-to-back direction. The device body 2 (oil mist removal device 1) is placed on an installation surface via the pair of legs 10. Openings 2F, 2R (see Figure 3) are provided on both end faces of the device body 2 in the front-to-back direction.

[0039] (Front cover, electrical components) An opening 2F at the front of the device body 2 is closed by a front cover 11. The front cover 11 is detachably attached to (the peripheral edge of) the opening 2F. Two support posts 12 (see FIG. 3), one on the left and one on the right, protrude from the front (outer surface) of the front cover 11, and an electrical equipment section 13 is fixed to the front cover 11 via the support posts 12. The electrical equipment section 13 has a diameter slightly smaller than the outer diameter of the device body 2 and is formed in a generally truncated cone shape that tapers forward. The electrical equipment section 13 houses electrical components 14 (see FIG. 3), such as various control boards that control the rotation speed of the motor 3 and detect the rotation load, and a power supply board that controls the power supply.

[0040] (rear cover) An opening 2R at the rear of the device body 2 is closed by a rear cover 20. The rear cover 20 is detachably attached to (the peripheral edge of) the opening 2R of the device body 2. A ring-shaped seal material S (see FIG. 3) is interposed between the peripheral edge of the opening 2R of the device body 2 and the rear cover 20.

[0041] (intake section) An intake section 15 is provided on the upper side of the right front side of the device body 2, which takes in air from the outside of the device body 2 (machine tool) into the inside. The intake section 15 is a cylindrical pipe that protrudes rightward from the right front side of the device body 2. The intake section 15 is in communication with the machine tool via a duct (not shown). Oil mist generated by the machine tool flows into the inside of the device body 2 together with air through the duct and the intake section 15.

[0042] (Exhaust section) An exhaust unit 16 that exhausts air from inside the device body 2 to the outside (open air) is provided on the upper rear surface (periphery) of the device body 2. The exhaust unit 16 is configured by attaching a mesh member to an opening formed on the peripheral surface of the device body 2. The exhaust unit 16 may include an air filter (not shown) such as a HEPA (High Efficiency Particulate Air Filter). This air filter may be attached to the inner peripheral surface of the device body 2 by means of screws or the like.

[0043] (1st to 3rd mounting plates) 3 to 5, a first mounting plate 21, a second mounting plate 22, and a third mounting plate 23 are arranged side by side in this order from front to rear (from upstream to downstream in the flow direction) at intervals inside the device main body 2. The first to third mounting plates 21 to 23 are arranged in an upright position in the vertical direction (orthogonal to the flow direction) to divide the inside of the device main body 2 in the front-to-rear direction (flow direction).

[0044] As shown in Fig. 6, the first mounting plate 21 has a substantially semicircular shape, and the upper side of the first mounting plate 21 has a plurality of (for example, three) first openings 21A for allowing air to circulate. The lower side of the first mounting plate 21 has a shaft hole 21B for allowing the rotary shaft 3A of the motor 3 to pass therethrough. The second mounting plate 22 and the third mounting plate 23 are formed in an annular shape with an open shaft center. The peripheral edges of the first to third mounting plates 21 to 23 are attached to the inner peripheral surface of the device body 2 (see Fig. 3). The lower parts of the second mounting plate 22 and the third mounting plate 23 are spaced upward from the lower inner peripheral surface of the device body 2 (see Fig. 3).

[0045] (Expanded Metal) As shown in FIGS. 3 and 6 , an expanded metal 24 is attached to the rear surface (downstream surface) of the first mounting plate 21 so as to cover the first opening 21A. The expanded metal 24 is a mesh-like metal plate with roughly diamond-shaped holes arranged in a staggered pattern. The expanded metal 24 captures (removes) particles larger than oil mist (e.g., dust) from the air containing oil mist before removing the oil mist from the air. In other words, the expanded metal 24 is a rough-removal filter that pre-treats the air containing oil mist. Note that a punched metal or a wire mesh may be used instead of the expanded metal 24 (not shown). The expanded metal 24 may also be attached to the front surface (upstream surface) of the first mounting plate 21 (not shown).

[0046] (inducer) An inducer 25 is attached to the rear surface (downstream surface) of the second mounting plate 22, which is formed in an annular shape, so as to cover the axial opening (on the same axis as the second mounting plate 22). A second opening 25A opens at the axial center (center) of the inducer 25. The inducer 25 guides the air that has passed through the expanded metal 24 (first opening 21A) to a suction fan 4 (described later) that is arranged downstream of the second mounting plate 22. The inducer 25 may also be attached to the front surface (upstream surface) of the second mounting plate 22 (not shown).

[0047] (1st to 2nd partition plates) 3 to 6, a first partition plate 26 and a second partition plate 27 are provided inside the device main body 2. The first partition plate 26 extends rearward from the rear surface of the first mounting plate 21, below the first opening 21A of the first mounting plate 21 and above the shaft hole 21B. The second partition plate 27 extends forward from the lower end of the first mounting plate 21.

[0048] (Details of the first partition, lead-in passage, motor room) The first partition plate 26 is formed in a generally semi-cylindrical shape that bulges upward. The first partition plate 26 is installed generally horizontally between the first mounting plate 21 and the front cover 11 and divides the interior of the front side (upstream side) of the device main body 2 into two spaces, upper and lower. The upper space divided by the first partition plate 26 serves as an introduction path R1 that connects the intake section 15 and the first opening 21A of the first partition plate 26 (see FIG. 3). The introduction path R1 is formed to guide the air taken into the device main body 2 toward the suction fan 4. The lower space divided by the first partition plate 26 serves as a motor chamber R2 in which the motor 3 is disposed (see FIG. 3). The first partition plate 26 prevents air containing oil mist from hitting the motor 3.

[0049] (inspection door, ventilation hole) As shown in Figures 1, 3 to 5, a removable inspection door 17 that opens the lead-in path R1 is provided on the upper front surface of the device body 2. By removing the inspection door 17, an opening appears on the upper front surface of the device body 2, making it possible to remove relatively large objects such as chips and dust that have accumulated in the lead-in path R1. As shown in Figures 2 and 3, a plurality of ventilation holes 18 are formed on the lower front surface of the device body 2 to introduce outside air into the motor chamber R2 (the space in which the motor 3 is located). The motor 3 is cooled by the outside air that flows in through the ventilation holes 18. A fan (not shown) for cooling the motor 3 may be provided in the motor chamber R2.

[0050] (Second partition) 3 to 6, the second partition plate 27 is formed in a generally semi-cylindrical shape that bulges downward. The second partition plate 27 is installed generally horizontally between the first mounting plate 21 and the lower edge of the second opening 25A of the inducer 25, and divides the space between the first mounting plate 21 and the second mounting plate 22 into two spaces, upper and lower. The upper space divided by the second partition plate 27 serves as a passageway for circulating air that has passed through the expanded metal 24 (first opening 21A).

[0051] <Motor> As shown in Figures 3, 6, and 7, the motor 3 is an electric motor equipped with a cooling fan (not shown) and is provided on the front side (upstream side) inside the device main body 2. Specifically, the motor 3 is housed in a motor chamber R2 of the device main body 2 and is installed substantially horizontally between the first mounting plate 21 and the front cover 11 (see Figure 3). The motor 3 is oriented such that the rotation shaft 3A extends from the front to the rear (from the upstream side to the downstream side in the flow direction). Because the motor 3 (motor chamber R2) is located near the rear side of the electrical component 14 (electrical equipment section 13) (see Figure 3), it is possible to shorten the wiring between the motor 3 and the electrical component 14.

[0052] (flange coupling) The rotating shaft 3A passes through the shaft hole 21B of the first mounting plate 21, and an upstream flange coupling 31 is connected to the rotating shaft 3A. A downstream flange coupling 32 is connected to the tip of the upstream flange coupling 31. The upstream flange coupling 31 and the downstream flange coupling 32 rotate around the same axis as the rotating shaft 3A. For ease of explanation, in this specification, the upstream flange coupling 31 and the downstream flange coupling 32 will be referred to as the flange couplings 31 and 32 when being described collectively.

[0053] <Suction fan> As shown in Figures 3 to 6, the suction fan 4 is provided inside the device body 2, rearward (downstream) of the motor 3. Specifically, the suction fan 4 is arranged coaxially with the second mounting plate 22 (inducer 25) rearward (downstream). The suction fan 4 is a centrifugal blower that draws in air from its axial center and sends the air radially outward. As will be described in detail later, the suction fan 4 has the function of circulating air drawn into the device body 2 from the outside (machine tool) through the intake section 15 from the front to the rear (from one side in the axial direction to the other). The suction fan 4 also has the function of separating oil mist contained in the air (from the air).

[0054] As shown in FIGS. 3 and 6, the suction fan 4 includes a suction disk 41, a mounting disk 42, and a plurality of rotary blades 43.

[0055] The suction disk 41 and the mounting disk 42 are formed into the same disk shape and are arranged on the same axis with a gap in the front-to-rear direction (flow direction). The suction disk 41 is located rearward (downstream) of the second mounting plate 22 (inducer 25) and faces the second mounting plate 22 in a generally parallel manner with a gap between them. The mounting disk 42 is located rearward of the suction disk 41 and faces the suction disk 41 in a generally parallel manner with a gap between them. A plurality of (e.g., eight) rotary vanes 43 are sandwiched (fixed) between the suction disk 41 and the mounting disk 42 and are arranged at generally equal intervals in the circumferential direction. In other words, the suction fan 4 has a sandwich structure in which the rotary vanes 43 are sandwiched between the two disks 41, 42. The rotary vanes 43 extend radially while curving from the center toward the outside in the radial direction.

[0056] A suction opening 41A is formed in the axial center of the suction disc 41 so as to face the second opening 25A of the inducer 25 (see FIG. 3). A mounting opening 42A is formed in the axial center of the mounting disc 42 so as to face the suction opening 41A (see FIG. 6). As shown in FIG. 3, the tip side (rear end side) of the upstream flange coupling 31 passes through the second opening 25A of the inducer 25 and the suction opening 41A of the suction disc 41, abuts against the front edge of the mounting opening 42A of the mounting disc 42, and its tip axial center is fitted into the mounting opening 42A. On the other hand, the base end side (front end side) of the downstream flange coupling 32 abuts against the rear edge of the mounting opening 42A of the mounting disc 42, and its base end axial center is fitted into the axial center of the upstream flange coupling 31. In this way, the mounting disk 42 is sandwiched (fixed) between the upstream flange coupling 31 and the downstream flange coupling 32, and the suction fan 4 is connected to the rotary shaft 3A of the motor 3 via the flange couplings 31 and 32. As a result, the suction fan 4 is driven to rotate around its axis by the motor 3.

[0057] <Rectifier plate> 3 to 7, the rectifying plate 5 is provided coaxially behind (downstream from) the suction fan 4 inside the device body 2. The rectifying plate 5 is attached (coaxially with) the third attachment plate 23 so as to cover the axial opening of the third attachment plate 23, which is formed in an annular shape. The rectifying plate 5 has a rectifying substrate 51 and a plurality of rectifying blades 52.

[0058] (Rectifier board) 3 and 6, the rectifying substrate 51 is formed in a substantially circular plate shape, and is fixed to the front surface (upstream surface) of the third mounting plate 23. A shaft through-hole 51A is formed in the axial center of the rectifying substrate 51, and a plurality of rectifying openings 51B are formed on the radially outer side of the rectifying substrate 51 so as to surround the outer periphery of the shaft through-hole 51A (see FIG. 6).

[0059] (bearing holder, bearing part) As shown in FIG. 3 , a bearing holder 33 is fixed to the axial center of the front (upstream) surface of the rectifier substrate 51 so as to surround the shaft through-hole 51A. The bearing holder 33 has a generally U-shaped cross section, and a bearing portion 34 is fitted inside the bearing holder 33. The downstream flange coupling 32 described above passes through the bearing portion 34 and the shaft through-hole 51A and extends rearward (downstream). The bearing portion 34 is a rolling bearing such as a ball bearing, and its inner ring is fixed to the outer peripheral surface of the downstream flange coupling 32 and its outer ring is fixed to the inner peripheral surface of the bearing holder 33. The bearing portion 34 is held by the bearing holder 33 and supports the downstream flange coupling 32 rotatably around its axis. The rotating shaft 3A of the motor 3 and the flange couplings 31 and 32 are integrated to form a drive shaft that transmits driving force. This drive shaft is installed between the bearing portion 34 and a bearing (not shown) that supports the rotating shaft 3A inside the main body of the motor 3. Therefore, the rotating shaft 3A and the flange couplings 31, 32 are supported by two points, the bearing and the bearing portion 34, which are spaced apart in the axial direction, while ensuring stable rotation.

[0060] (flow straightening blade) As shown in FIGS. 3, 6, and 7, the straightening vanes 52 protrude forward (upstream) from the front surface (upstream surface) of the straightening substrate 51. A plurality of (e.g., 20) straightening vanes 52 are arranged at approximately equal intervals in the circumferential direction so as to correspond to a plurality of straightening openings 51B of the straightening substrate 51. The straightening vanes 52 are formed in the shape of plates extending radially from the center toward the outside in the radial direction. The straightening vanes 52 are formed in an approximately trapezoidal shape with the amount of protrusion gradually increasing from the center toward the outside in the radial direction. The straightening vanes 52 have the function of rectifying the air flow so that it is directed in the airflow direction (front-rear direction) by directing the air along the straightening vanes 52.

[0061] <Collection disc> As shown in Figures 3, 5 to 7, the collection disk 6 is provided inside the device main body 2, coaxially behind (downstream of) the suction fan 4. The collection disk 6 faces the rear end face (the other end face in the axial direction) of the device main body 2, which defines the opening 2R, in a position substantially parallel to the rear end face (the other end face in the axial direction) of the device main body 2 (see Figure 3). The collection disk 6 has the function of separating oil mist contained in the air (from the air) by rotating around its axis. As will be described in detail later, the collection disk 6 is provided inside the device main body 2 in a state where it can be attached and detached through the opening 2R (see Figure 5).

[0062] 3 and 5, the collection disc 6 is connected to the tip of the downstream flange coupling 32, which extends rearward (downstream) from the bearing portion 34. Specifically, the tip of the downstream flange coupling 32 passes through shaft mounting holes 61A, 62A (described later) that open at the axial center of the collection disc 6, and protrudes rearward from the collection disc 6. A collection disc mounting plate 60 is fixed to the protruding tip of the downstream flange coupling 32 by means of screws or the like, thereby fixing the collection disc 6 to the downstream flange coupling 32. The collection disc 6 is connected to the rotary shaft 3A of the motor 3 via the flange couplings 31, 32, and is therefore driven to rotate about the axis by the motor 3.

[0063] As shown in FIG. 8, the collection disk 6 has a pair of disk portions 61 and a slit plate 62.

[0064] (Disc section) The pair of disk portions 61 are made of stainless steel, for example, and are formed in the same circular shape with a thickness of several millimeters. A shaft mounting hole 61A is drilled in the axial center of the disk portion 61, through which the tip of the downstream flange coupling 32 passes. A plurality of collection openings 61B are drilled in the radial outer side of the disk portion 61, surrounding the outer periphery of the shaft mounting hole 61A. The plurality of collection openings 61B are formed at approximately equal intervals in the circumferential direction and are aligned radially inside and outside. In other words, the plurality of collection openings 61B are aligned in a double annular shape. The radial outer region of the disk portion 61, where the plurality of collection openings 61B are open, is formed in a substantially lattice pattern by a plurality of radially extending frames and a double annular frame.

[0065] (Slit plate) The slit plate 62 is made of stainless steel, for example, with a thickness of several millimeters, and is formed in a circular shape that is substantially the same as the disk portion 61. The slit plate 62 is sandwiched between a pair of disk portions 61 that face each other in the front-rear direction (axial direction), and is fixed to the pair of disk portions 61 with rivets (not shown). The slit plate 62 is formed of a stainless steel material for springs (SUS304CSP, thickness: 1 mm or less, preferably 0.2 mm). Using such a spring material makes it easy to process the slit plate 62 and procure the material. The slit plate 62 may also be fixed to the pair of disk portions 61 with screws, bolts, or the like (not shown) instead of rivets, so that it can be replaced in the event of damage, etc.

[0066] The slit plate 62 is formed with a shaft mounting hole 62A that coincides with the shaft mounting hole 61A of the disk portion 61, and multiple slit forming portions 62B that coincide with the multiple collection openings 61B. Multiple slits 63 are opened at a predetermined pitch in the slit forming portion 62B of the slit plate 62. The multiple slits 63 are formed to extend radially (in the radial direction). The width W of the slits 63 is approximately several mm, and may be set, for example, in the range of 0.5 to 2.0 mm. The slits 63 are formed by known processing techniques, such as etching or pressing. The extending direction of the slits 63 may be freely changed.

[0067] The slit plate 62 is formed so as to be divisible into a plurality of (for example, four) divided plates 64. The divided plates 64 are formed in a generally fan shape (quarter circle shape) so as to divide the slit plate 62 into four equal parts in the circumferential direction. The number of divisions of the slit plate 62 (the number of divided plates 64) may be increased or decreased freely. Furthermore, the slit plate 62 does not have to be divisible and may be formed as a single plate (not shown).

[0068] <Exhaust muffler> As shown in Figures 3, 4, 6, and 9, the exhaust muffler 7 is arranged coaxially behind (downstream of) the collection disk 6 and has the function of reducing exhaust noise. The exhaust muffler 7 is fixed to the front surface (inner surface (upstream surface in the flow direction)) of the rear cover 20 via bolts or the like and is detachable together with the rear cover 20 from the device main body 2. The collection disk 6 faces the opening 2R of the device main body 2, sandwiching the exhaust muffler 7 and rear cover 20 therebetween (see Figure 3). The exhaust muffler 7 has a funnel shape (tapered shape) whose diameter gradually decreases from the front to the rear (from the upstream side to the downstream side). The exhaust section 16 of the device main body 2 is located in a position facing the upper peripheral surface of the exhaust muffler 7 (see Figure 3). A gap (space) is formed between the outer peripheral surface of the exhaust muffler 7 and the inner peripheral surface of the device main body 2 (see Figure 3).

[0069] The area of ​​the exhaust muffler 7 facing the exhaust section 16, i.e., the upper peripheral surface of the exhaust muffler 7, is shielded (no exhaust holes 7A are drilled therein). On the other hand, the area of ​​the exhaust muffler 7 opposite the exhaust section 16, i.e., the lower peripheral surface of the exhaust muffler 7, is drilled with a plurality of exhaust holes 7A. The plurality of exhaust holes 7A are arranged in a substantially lattice pattern on the lower peripheral surface of the exhaust muffler 7. The exhaust holes 7A are circular openings, and the further rearward (downstream) they are located, the smaller their diameters become (see FIG. 9). Note that the number, shape, size (diameter) and arrangement of the exhaust holes 7A are not limited to those described above and may be freely changed.

[0070] As described above, the motor 3, suction fan 4, straightening plate 5, collection disk 6, exhaust muffler 7 and rear cover 20 are aligned with their respective axes and are arranged in a line in this order from front to rear (from upstream to downstream) (see Figures 3 and 6).

[0071] <Waste Oil Section> 2 and 3, the waste oil section 8 is provided at the bottom of the device body 2 below the suction fan 4 and the collection disk 6, with the waste oil space R3 between them, and has the function of discharging the collected oil mist to the outside (for example, a waste oil tank (not shown)). The waste oil section 8 has an oil pan 8A and a waste oil port 8B.

[0072] (oil pan) The oil pan 8A is formed in a roughly semi-cylindrical shape and is fixed to the lower peripheral surface of the device main body 2. A waste oil space R3 is formed between the oil pan 8A and the suction fan 4, collection disc 6, etc. The oil pan 8A receives the oil mist (oil droplets) that has been collected by the suction fan 4 and collection disc 6 and condensed. The bottom surface of the oil pan 8A slopes downward from the front to the rear (from the upstream side to the downstream side).

[0073] (Waste oil section) The oil drain port 8B is formed in a substantially cylindrical shape and extends rearward from the rear end of the oil pan 8A. The oil drain port 8B is located rearward (downstream) of the collection disk 6, specifically, facing the lower portion of the exhaust muffler 7. A waste oil hose 8C extending from an external waste oil tank is connected to the oil drain port 8B. The waste oil drain port 8B discharges waste oil (oil mist) that has fallen into the oil pan 8A and flowed along the inclined bottom surface to the outside of the device main body 2 (to the waste oil tank). Note that while the waste oil drain port 8B is located downstream of the collection disk 6, this is not a limitation, and it may be located, for example, between the suction fan 4 and the collection disk 6 (not shown). In other words, the oil drain port 8B may be located downstream of the suction fan 4.

[0074] (Windbreak section) As shown in Figures 3 and 6, a wind deflector 28 is attached to the lower end of the third mounting plate 23. The wind deflector 28 is bent in a substantially L-shape and is provided so as to close off a portion of the space between the suction fan 4 and the collecting disc 6 in the waste oil space R3. The tip of the wind deflector 28 is provided rearward (downstream) of the collecting disc 6. The wind deflector 28 slopes downward from the front to the rear (from upstream to downstream). In other words, the wind deflector 28 slopes downward toward the waste oil port 8B. The wind deflector 28 is provided to prevent the wind generated by the suction fan 4 from affecting the oil mist collected by the collecting disc 6.

[0075] [Oil mist removal operation] The oil mist removal operation by the oil mist removal device 1 will be described mainly with reference to Fig. 3. Note that the thick arrows in Fig. 3 indicate the flow of air.

[0076] <Air introduction> The operator performs a predetermined operation to drive the motor 3. When the rotating shaft 3A of the motor 3 and the flange couplings 31 and 32 rotate about their axes, the suction fan 4 and collection disk 6 also rotate about their axes. When the suction fan 4 rotates, an airflow from the front to the rear is generated inside the device body 2. Oil mist generated by the external machine tool passes through the duct together with the air and flows from the intake section 15 into the introduction path R1 of the device body 2.

[0077] <Pretreatment> When the air containing oil mist passes through the expanded metal 24 (the first opening 21A of the first mounting plate 21) from the introduction path R1, the expanded metal 24 captures particles larger than the oil mist. In other words, the air containing oil mist is pre-treated.

[0078] <Primary collection> The pre-treated air flows between the first mounting plate 21 and the second mounting plate 22, passes through the second opening 25A of the inducer 25, and is sucked into the gap between the suction disk 41 and the mounting disk 42 through the suction opening 41A of the suction disk 41. The air sucked between the two disks 41 and 42 flows radially from the inside to the outside along the direction of rotation of the rotating blades 43 (suction fan 4) due to the action of the multiple curved rotating blades 43 rotating around the axis. During this process, oil mist contained in the air collides with the rotating blades 43 or is repelled radially outward by centrifugal force, condenses (is collected), and falls into the oil pan 8A as oil droplets (see the arrows indicated by dashed lines in FIG. 3). As described above, the rotation of the suction fan 4 performs primary collection of the oil mist.

[0079] <Secondary collection> The air that has undergone primary collection flows further rearward (downstream), where the collecting disk 6 separates (secondarily collects) the oil mist that could not be separated (primarily collected) by the suction fan 4 from the air. The collecting disk 6, which rotates in the same direction as the suction fan 4, causes the disk portion 61, the frame portion of the slit plate 62, and the edges of the slits 63 to collide with the oil mist, or uses centrifugal force to repel the oil mist radially outward, thereby condensing (collecting) the oil mist. Incidentally, the air that has undergone primary collection is discharged radially outward from the suction fan 4 and flows in the direction of rotation of the suction fan 4. Because the collecting disk 6 rotates in the same direction as the air that has undergone primary collection, it is difficult to cause the edges of the slits 63 and the like to strongly collide with the oil mist, resulting in a decrease in secondary collection performance. Therefore, in this embodiment, the straightening plate 5 straightens the air passing through the collecting disk 6 in the front-to-rear direction (axial direction).

[0080] After primary collection, the air flows (is rectified) rearward (downstream) along the plurality of straightening vanes 52 while its flow in the rotational direction is restricted by the plurality of straightening vanes 52. The rectified air flows through the straightening opening 51B to the collection disk 6, and oil mist contained in the air is secondarily collected by, for example, colliding with the rotating collection disk 6 (the edges of the slits 63), turning into oil droplets and falling onto the oil pan 8A (see the arrows indicated by dashed dotted lines in FIG. 3). Note that because the slits 63 are formed to extend radially (along the radial direction), the oil mist is more easily repelled than if they extended in the circumferential direction, and the oil mist can be collected (separated) more efficiently.

[0081] <Exhaust> The clean air (secondarily collected air) that has passed through collection disk 6 and has had oil mist separated from it flows into exhaust muffler 7 and flows out of multiple exhaust holes 7A to the outside of exhaust muffler 7, more precisely, into the space between exhaust muffler 7 and device main body 2. The clean air flows upward along the outer peripheral surface of exhaust muffler 7 (the inner peripheral surface of device main body 2) and is discharged from inside device main body 2 to the outside through exhaust section 16.

[0082] <Waste oil> Oil droplets (waste oil) that fall onto the oil pan 8A through primary and secondary collection flow along the slope of the bottom of the oil pan 8A toward the oil drain port 8B (rearward). The oil drain section 8 also employs a positive pressure oil drain system, which uses the wind from the suction fan 4 to force the waste oil toward the oil drain port 8B. Specifically, because the oil drain port 8B is located downstream of the suction fan 4, the wind generated by the suction fan 4 pushes the waste oil on the oil pan 8A toward the oil drain port 8B. The waste oil travels from the oil drain port 8B through the oil drain hose 8C and is collected in a waste oil tank.

[0083] Here, the amount of airflow directed radially outward is greater for the suction fan 4 than for the collection disk 6. For this reason, there is a risk that the airflow generated by the suction fan 4 will find its way between the straightening plate 5 and the collection disk 6 through the waste oil space R3, preventing proper secondary collection (falling of oil droplets) by the collection disk 6. Therefore, in this embodiment, the wind deflector 28 prevents the airflow from the suction fan 4 from finding its way between the straightening plate 5 and the collection disk 6. In addition, because the wind deflector 28 has a downward slope toward the downstream side, the oil droplets that have been secondarily collected fall onto the wind deflector 28, flow along the slope, and fall onto the oil pan 8A.

[0084] During the oil mist removal operation, oil droplets and the like adhere to the collection disk 6, clogging the slits 63 and reducing the oil mist removal (capture) performance. For this reason, maintenance, such as cleaning the collection disk 6, is required after a predetermined period of operation or periodically. In the oil mist removal device 1 according to this embodiment, the collection disk 6 is disposed downstream of the motor 3 and the suction fan 4 in the airflow direction (the other side of the axial direction) (see FIG. 3). The collection disk 6 faces the opening 2R (opening surface) of the device body 2 in parallel, sandwiching the exhaust muffler 7 and other components therebetween (see FIG. 3). With this configuration, a worker performing maintenance on the collection disk 6 can open the opening 2R at the rear end surface of the device body 2 simply by removing the cover 20 after the exhaust muffler 7 is fixed (see FIG. 4). This allows easy access to the collection disk 6 (collection disk mounting plate 60) through the opening 2R, allowing the worker to easily install and remove the collection disk mounting plate 60. This makes it possible to easily attach and detach the collection disk 6 through the opening 2R (see FIG. 5), thereby improving the ease of maintenance of the collection disk 6.

[0085] Furthermore, in the oil mist removal device 1 according to this embodiment, the device body 2 is installed horizontally, the motor 3 is arranged upstream of the suction fan 4, and the collecting disk 6 is arranged downstream of the suction fan 4. In other words, because the motor 3, suction fan 4, and collecting disk 6 are arranged horizontally in a row, the height of the oil mist removal device 1 can be made lower than if the device body 2 were installed vertically.

[0086] In the oil mist removal device 1 according to this embodiment, the motor 3, suction fan 4, rectifying plate 5, and collecting disk 6 are arranged in this order from upstream to downstream in the oil flow direction. Some of the oil mist contained in the air is primarily collected by the suction fan 4, while any oil mist not primarily collected by the suction fan 4 is secondarily collected by the collecting disk 6. The air discharged from the suction fan 4 flows in the rotational direction of the suction fan 4, but is rectified by the rectifying plate 5 to flow in the front-to-rear direction (axial direction). With this configuration, the flow direction (axial direction) of the oil-mist-containing air intersects with the rotational direction of the collecting disk 6, making it easier for the rotating collecting disk 6 to collide with the oil mist, thereby efficiently repelling the oil mist. This improves the oil mist collection efficiency. Furthermore, because the motor 3 is located at the most upstream side in the oil flow direction, the air flow is not obstructed, allowing the air to flow smoothly downstream.

[0087] Furthermore, according to the oil mist removal device 1 of this embodiment, the rotating shaft 3A journaled by the motor 3 is also rotatably supported by the bearing portion 34 via the flange couplings 31 and 32, ensuring stable, runout-free rotation of the rotating shaft 3A, etc. This allows for stable rotation of the collection disc 6.

[0088] Furthermore, in the oil mist removal device 1 according to this embodiment, the rectifying vane 5 is fixed inside the device body 2 between the suction fan 4 and the collecting disk 6, the bearing holder 33 is fixed to the device body 2 via the rectifying vane 5, and the bearing portion 34 is interposed between the bearing holder 33 and the downstream flange coupling 32. With this configuration, the rotating shaft 3A and the flange couplings 31, 32 form an integrated shaft that is installed between the motor 3 and the bearing portion 34 and supported at two locations on both sides in the axial direction, thereby suppressing vibration of the rotating rotating shaft 3A.

[0089] Furthermore, according to the oil mist removal device 1 of this embodiment, the trapping disk 6 has a structure in which the slit plate 62 is sandwiched between a pair of disk portions 61. This improves the strength (rigidity) of the trapping disk 6 compared to a trapping disk 6 composed only of the slit plate 62. Furthermore, because the slit plate 62 can be divided into multiple divided plates 64, manufacturing costs, such as mold costs and material costs, can be reduced compared to manufacturing a single large slit plate 62. Furthermore, if the slit plate 62 (divided plates 64) is replaceable, even if one of the divided plates 64 is damaged, only the damaged divided plate 64 needs to be replaced. This reduces the replacement costs compared to replacing the entire slit plate 62. As described above, by forming the slit plate 62 from multiple divided plates 64, initial costs and running costs can be reduced, resulting in an economical trapping disk 6. Furthermore, the slits 63 can be easily formed using known processing techniques, such as etching.

[0090] Furthermore, according to the oil mist removal device 1 of this embodiment, noise generated during operation can be reduced by the exhaust muffler 7. Furthermore, the exhaust muffler 7 is fixed to the rear cover 20, and by removing the rear cover 20 from the device main body 2, the exhaust muffler 7 can also be removed together (see FIG. 4), which improves accessibility and ease of maintenance of the collection disc 6.

[0091] Furthermore, in the oil mist removal device 1 according to this embodiment, the shortest path connecting the exhaust hole 7A of the exhaust muffler 7 and the exhaust section 16 is blocked, so that the clean air from which the oil mist has been removed flows from the inside of the exhaust muffler 7 through the exhaust hole 7A into the space between the exhaust muffler 7 and the device body 2, bypasses the outer periphery of the exhaust muffler 7, and is released to the outside of the device body 2 through the exhaust section 16 (see FIG. 3). By exhausting the clean air in this way, the noise generated during exhaust can be effectively reduced. Furthermore, because the exhaust muffler 7 is tapered and its outer periphery is inclined, a wide space can be secured between the outer periphery of the exhaust muffler 7 and the inner periphery of the device body 2, ensuring a sufficient flow rate (airflow) of clean air.

[0092] Furthermore, according to the oil mist removal device 1 of this embodiment, by providing a wind deflector 28, the exhaust (exhaust oil) from the suction fan 4 side is prevented from flowing around to the collecting disk 6 side, and the oil mist collected by the collecting disk 6 can be dropped into the waste oil section 8.

[0093] Furthermore, the oil mist removal device 1 according to this embodiment can be a positive pressure oil drain system in which the wind force of the suction fan 4 acts on the waste oil (oil mist) and pushes the waste oil toward the oil drain port 8B. Moreover, because the wind shield 28 slopes downward toward the oil drain port 8B, the oil mist captured by the collection disk 6 can be guided toward the oil drain port 8B. This prevents the waste oil (oil mist) from accumulating in the oil drain port 8B, allowing for smooth oil drainage.

[0094] Furthermore, with the oil mist removal device 1 according to this embodiment, the inspection door 17 and ventilation holes 18 are located together with the motor 3, which is located upstream of the suction fan 4, making it possible to effectively utilize the space around the motor 3 and to reduce the size of the oil mist removal device 1. Furthermore, as relatively large objects to be sucked in, such as chips, may accumulate in the introduction path R1, providing the inspection door 17 makes it possible to easily remove the chips and the like.

[0095] In the oil mist removal device 1 according to this embodiment, the motor 3, suction fan 4, rectifying vane 5, and collecting disk 6 are arranged side by side in a line in the front-to-rear direction (axial direction) with their axes roughly aligned, but the present invention is not limited to this. For example, some or all of the motor 3, suction fan 4, rectifying vane 5, and collecting disk 6 may be arranged side by side in a line in the front-to-rear direction with their axes offset in the vertical and / or horizontal directions (not shown).

[0096] Furthermore, in the oil mist removal device 1 according to this embodiment, the collection disk 6 faces parallel to the opening 2R (opening surface) of the device body 2 with the exhaust muffler 7 and the like sandwiched between them, but the present invention is not limited to this. For example, if the internal space of the device body 2 is large, the collection disk 6 may be positioned offset in the vertical and / or horizontal directions from the opening 2R (not shown).

[0097] Furthermore, in the oil mist removal device 1 according to this embodiment, the motor 3 is provided at the forefront of the device body 2 (the most upstream side in the flow direction), but the present invention is not limited to this. For example, the motor 3 may be provided between the suction fan 4 and the collection disk 6 (straightening plate 5) (not shown). In this case, the motor 3 may have a pair of rotating shafts 3A protruding on both sides in the axial direction (flow direction), and the pair of rotating shafts 3A may be connected to the suction fan 4 and the collection disk 6 (not shown).

[0098] Furthermore, in the oil mist removal device 1 according to this embodiment, the rotating shaft 3A of the motor 3 is connected to the axial center of the suction fan 4 and the collecting disc 6 via flange couplings 31 and 32, but the present invention is not limited to this. For example, the rotating shaft 3A of the motor 3 may be directly connected to the axial center of the suction fan 4 or the like, or may be connected to the axial center of the flange couplings 31 and 32 or the suction fan 4 or the like via a power transmission mechanism such as a gear train or pulley mechanism (not shown).

[0099] Furthermore, in the oil mist removal device 1 according to this embodiment, the suction fan 4 is a centrifugal blower, but this is not limited thereto, and it may be, for example, an axial blower (not shown) that sucks in air from one side in the axial direction (front) and blows it to the other side in the axial direction (rear).

[0100] Furthermore, in the oil mist removal device 1 according to this embodiment, the device body 2 is in a recumbent position, but this is not limiting, and for example, the device body 2 may be arranged in an upright position (a position in which the axial direction extends vertically) (not shown). Furthermore, while the device body 2 is formed in a substantially cylindrical shape, this is not limiting, and for example, it may be formed in a square cylindrical shape (not shown).

[0101] Furthermore, in the oil mist removing device 1 according to this embodiment, the rectifying plate 5 is provided immediately before the collecting disk 6, but the rectifying plate 5 may be omitted (not shown).

[0102] Furthermore, in the oil mist removal device 1 according to this embodiment, the exhaust muffler 7 is provided at the downstream end of the device body 2 in the flow direction, but this is not limiting, and an air filter such as a HEPA filter may be provided instead of the exhaust muffler 7 (not shown). The air filter is preferably fixed to the rear cover 20 and made detachable from the device body 2 together with the rear cover 20. Alternatively, an air filter may be provided between the collection disc 6 and the exhaust muffler 7 (not shown).

[0103] The above embodiment shows one aspect of the oil mist removal device according to the present invention, and the technical scope of the present invention is not limited to the above embodiment. The present invention may be modified, substituted, or altered in various ways without departing from the spirit of the technical concept, and the claims include all embodiments that may fall within the scope of the technical concept. [Industrial Applicability]

[0104] The technology of the present invention can be used in an oil mist removal device that separates oil mist generated from a processing machine from the air. [Explanation of symbols]

[0105] 1 Oil mist removal device 2. Device body 2R opening 3 motors 3A Rotating Axis 4. Suction fan 5 Rectifier plate 6 Collection disc 7 exhaust muffler 7A Exhaust hole 8 Waste oil section 8B Oil drain port 15 Intake section 16 Exhaust section 17 Inspection door 18 Ventilation hole 20 Rear cover (cover) 26 First partition (partition) 28 Windbreak 31 Upstream flange coupling (flange coupling) 32 Downstream flange coupling (flange coupling) 33 Bearing holder 34 Bearing section 61 Disk section 62 Slit Plate 63 Slit 64 split plate R1 approach road R3 Waste oil space

Claims

1. a device main body formed in a cylindrical shape extending from one end to the other in an axial direction and having an opening on the other end surface in the axial direction; a motor provided inside the device body; a suction fan provided inside the device body, rotated around its axis by the motor, and configured to circulate air drawn into the device body from one side in the axial direction to the other side; an oil mist removal device comprising: a collecting disk that is located inside the device body on the other side of the axial direction downstream of the motor and the suction fan in the air flow direction, the collecting disk being detachably installed inside the device body through the opening, the collecting disk being rotated about its axis by the motor, and separating the oil mist contained in the air.

2. 2. The oil mist removing device according to claim 1, wherein the collecting disk faces the other end face of the device body in the axial direction, which defines the opening, in a position parallel to the other end face.

3. The device body is disposed in a position in which the axial direction is a horizontal direction, 3. The oil mist removal device according to claim 1, wherein the motor is arranged on one side of the axial direction, upstream of the suction fan in the flow direction, with the rotation shaft extending from the upstream side to the downstream side in the flow direction.

4. a straightening plate provided inside the device body and straightening the air flow so as to direct it in the axial direction; 4. The oil mist removal device according to claim 1, wherein the motor, the suction fan, the straightening plate, and the collecting disk are arranged in this order from the upstream side to the downstream side of the flow direction.

5. a flange coupling that is rotatably supported by a bearing portion provided inside the device body, is connected to a rotation shaft of the motor, and rotates around the axis together with the rotation shaft; 5. The oil mist removal device according to claim 1, wherein the collecting disk is connected to a tip end of the flange coupling that is downstream of the bearing portion in the flow direction.

6. a straightening plate fixed inside the device body between the suction fan and the collection disk, and straightening the air flow so as to direct it in the axial direction; 6. The oil mist removing device according to claim 5, further comprising: a bearing holder fixed to the straightening plate and holding the bearing portion that supports the flange coupling.

7. The collection disc is a pair of disk portions facing each other in the axial direction; a slit plate sandwiched between the pair of disk portions and having a plurality of slits therein; 7. The oil mist removing device according to claim 1, wherein the slit plate is formed so as to be separable into a plurality of divided plates.

8. a cover detachably provided on the opening of the device body; 8. The oil mist removal device according to claim 1, further comprising an exhaust muffler fixed to the upstream surface of the cover in the flow direction, positioned downstream of the collection disk in the flow direction, and configured to reduce exhaust noise.

9. an exhaust section provided on a peripheral surface of the device body at a position facing the exhaust muffler and configured to exhaust the air drawn into the device body to the outside; The exhaust muffler has a funnel shape whose diameter gradually decreases from the upstream side to the downstream side in the flow direction, an area of ​​the exhaust muffler on the exhaust portion side is shielded; 9. The oil mist removing device according to claim 8, wherein a plurality of exhaust holes are formed in an area of ​​the exhaust muffler opposite to the exhaust portion.

10. a waste oil section that is disposed below the suction fan and the collecting disk at the bottom of the device body, the waste oil section sandwiching a waste oil space therebetween, and that discharges the collected oil mist to the outside; 10. The oil mist removal device according to claim 1, further comprising a windbreak that closes a portion of the waste oil space between the suction fan and the collecting disk.

11. The waste oil section has a waste oil port for discharging the oil mist to the outside of the device body, the waste oil port being located downstream of the suction fan in the flow direction. The oil mist removing device according to claim 10, wherein the windbreak portion is inclined downward toward the oil waste port.

12. The device body is disposed in a position in which the axial direction is a horizontal direction, the motor is disposed upstream of the suction fan in the flow direction, an introduction path that guides the air taken into the device body toward the suction fan is formed on the upstream side of the device body in the flow direction, and a partition plate is provided that separates the introduction path from a space in which the motor is disposed; 12. An oil mist removal device according to claim 1, wherein an inspection door for opening the inlet passage is provided on the peripheral surface of the device body, and a ventilation hole for taking in outside air into the space in which the motor is arranged is drilled.

13. a device main body formed in a cylindrical shape extending from one end to the other in an axial direction, disposed with the axial direction as a horizontal direction, and having an opening on the other end surface in the axial direction; an intake section provided on one side of the device body in the axial direction and adapted to take in air from the outside of the device body to the inside thereof; a motor provided inside the device body; a suction fan that is disposed inside the device body on the other side of the motor in the axial direction, is rotationally driven about its axis by the motor, draws the air from the intake portion into the device body, circulates the air from one side to the other in the axial direction, and separates oil mist contained in the air; a collecting disk disposed inside the device body on the other side of the suction fan in the axial direction, the collecting disk being detachably attached inside the device body through the opening, the collecting disk being driven to rotate about its axis by the motor, and separating the oil mist that could not be separated by the suction fan from the air; an exhaust section provided on the other side of the device body in the axial direction, which exhausts the air from which the oil mist has been separated by passing through the collecting disk from the inside of the device body to the outside.

Images