JP2016087581A - Oil mist collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively collect an oil component in a gas.SOLUTION: An oil collector has a main collection part 20 and a sub collection part 30, and captures an oil component in such a manner that a gas going around a lateral side of the main collection part 20 without passing the main collection part 20 is passed through a sub collection filter of the sub collection part 30. Further, an oil component captured by a rotary brush 21 of the main collection part 20 is blown off outwards by a centrifugal force by rotation of the rotary brush 21, and adheres to the sub collection filter. In the sub collection part 30, the oil component captured by the sub collection filter and the oil component adhered to the sub collection filter due to blown-off from the rotary brush 21 are fallen downwards.SELECTED DRAWING: Figure 7

Description

  The present invention relates to an oil mist collecting device for removing oil, cutting powder, and the like from a mist-like oil mist generated in a factory or work place.

  In metal processing workplaces such as automobile parts manufacturing factories, cutting oil is applied to the surface of metal, etc. in order to prevent temperature rise and improve machinability during cutting, grinding, and forging of metals. To supply or adhere. However, with this operation, a mist-like oil mist containing oil and cutting powder is generated during processing.

  If this oil mist is left unattended, all parts of the factory will be covered with oil. For example, if it adheres to a fluorescent lamp or a floor surface, the operator may slip and get injured, which causes a worsening of the work environment such as darkening the lamp.

  For this reason, some factories may define a limit value of the oil mist concentration from the viewpoint of environmental hygiene, and an oil mist collecting device with high collection efficiency is required.

  Conventionally, a device for efficiently collecting oil or the like from oil mist has been widely used. For example, Patent Document 1 discloses an oil mist collector device. The oil mist sucked into the device casing by the oil mist collector device collides with a rotating oil mist processing plate and utilizes centrifugal force. The oil component is collected by blowing off the oil component toward the inner wall surface of the apparatus casing and attaching the oil component to the inner wall surface.

  In addition, the dust removing device disclosed in Patent Document 2 is provided with a rotating brush body for liquid separation made of natural or synthetic fibers, metal wires, or the like, and rotates the rotating brush body in the same manner as Patent Document 1. In addition, the oil component is dispersed and collected from the oil mist by using centrifugal force to scatter the oil component in the circumferential direction of the rotating brush body.

JP 2008-155093 A JP-A-8-182910

  However, in the installation of the rotating body shown in FIGS. 2-1 and 4-1 of Patent Document 1 and FIG. 3 of Patent Document 2, if the rotating body is continuously operated in a rotating state at a high speed, the peripheral edge portion and the side wall surface of the rotating body. Leakage flow that passes between and passes through. And this leak flow is discharged | emitted from a discharge port, without passing the main collection part of the rotary body surface.

  The leak flow that does not pass through the main trapping part may reach about 7% to 10% of the total passing amount. In such a case, there is a problem that the oil trapping rate as a whole is not sufficient.

  An object of the present invention is to provide an oil mist collecting device that solves the above-described problems and captures an oil component of a gas that has circulated without passing through a main collecting portion by a sub-collecting portion.

  In order to achieve the above object, an oil mist collecting apparatus according to the present invention includes a sealed box body provided with an inlet and an outlet, and a partition plate for partitioning a gas to pass through a predetermined passage in the box body. A main collector for trapping oil contained by passing a gas, having a fan for forcibly generating an air flow so that the gas passes through the passage, and a disk-shaped collector rotating at high speed And around the main collection part is fixed in an annular shape, and the oil contained therein is captured by allowing the gas surrounding the collection part to pass without passing through the main collection part. And a secondary collecting section.

  According to the oil mist collecting apparatus according to the present invention, the air flow generated in the outer circumferential direction by the main collecting portion forcibly causes the air flow toward the outer circumferential direction without passing through the main collecting portion around the main collecting portion. It is made to collide with the sub collection part installed so that it may surround, and the collection efficiency of oil is raised.

It is an external appearance perspective view of an oil mist collection apparatus. It is a cross-sectional view of an oil mist collection device. It is a disassembled perspective view of the main collection part. It is a perspective view of the main collection part of a modification. It is a perspective view of a sub collection part. It is a front view of the state which combined the main collection part and the sub collection part. It is explanatory drawing of the gas which passes a main collection part and a sub collection part.

The present invention will be described in detail based on the embodiments shown in the drawings.
FIG. 1 is an external perspective view of an oil mist collecting device, and FIG. 2 is a longitudinal sectional view. The oil mist collecting device has a sealed box body 10, and an opening / closing door 11 for performing internal maintenance or the like is attached to a side surface of the box body 10 by a hinge.

  The box 10 is partitioned so that the gas circulates through a predetermined passage, and a partition plate 12 for that purpose is provided. A gas in which oil, cutting powder, or the like is in a mist form enters the box body 10 by a fan 14 made of, for example, a turbo fan that rotates in the box body 10 from a cylindrical suction port 13 provided at the front center of the box body 10. Sucked.

  The sucked gas passes through the main collection unit 20 and the sub collection unit 30, thereby removing oil components including cutting powder in the gas. The gas from which the oil has been collected and removed is discharged from a lattice-shaped discharge port 15 at the top of the box 10.

  The fan 14 is fixed to the rotating shaft 17 of the electric motor 16, and the pipe portion 18 at the lower front of the box 10 is used to collect and extract the oil collected in the oil pan 19 provided at the lower part of the box 10. It is an extraction port provided with a cock (not shown).

  Of the arrows shown in the figure, the arrows filled with dots indicate the flow of gas containing oil mist, and the arrows without dots indicate the flow of gas after collecting and removing oil mist.

  FIG. 3 is an exploded perspective view of the main collection unit 20, and the main collection unit 20 includes a rotating brush body 21 and a back plate 22. The rotating brush body 21 and the back plate 22 are arranged in the box 10 in a shape in which they are integrally bonded.

  In the disk-shaped rotating brush body 21, a large number of synthetic resin linear materials 21b oriented in the radial direction are densely arranged in a brush shape around a central metal disk portion 21a. The linear material 21b is fixed, for example, as a bundle of a plurality of pieces by inserting holes provided in the disk portion 21a.

  The diameter of the rotating brush body 21 is about 30 cm, for example, but an appropriate size is used according to the scale of the installation place, and the linear material 21b has elasticity and flexibility. Although it is preferably made of synthetic resin, there is no problem even if it is made of metal.

  A plurality of the linear materials 21b are arranged in the thickness direction of the rotary brush body 21, but the filling rate of the linear materials 21b, that is, the proportion of the linear materials 21b in the predetermined space is that of the rotary brush body 21. The collection efficiency is affected, and the higher the filling rate, the greater the collection efficiency. Moreover, the wire diameter of the linear material 21b is about 0.1-0.5 mm, for example, and collection efficiency is so high that a wire diameter is thin. However, the higher the filling rate and the thinner the wire diameter, the more likely to be clogged with oil.

  Therefore, if the wire diameter of the linear material 21b is too thin, the collection efficiency is high at the beginning of use, but clogging with oil occurs with the passage of time, and the collection efficiency is significantly reduced. For this reason, by appropriately selecting the filling rate and the wire diameter of the linear material 21b, oil clogging over time, that is, a reduction in collection efficiency can be alleviated.

  The back plate 22 provided on the leeward side and behind the rotating brush body 21 is preferably made of an annular metal plate having a diameter slightly shorter than the diameter of the rotating brush body 21. When the back plate 22 and the rotating brush body 21 have the same diameter, the leading end of the linear material 21b enters the back side of the window portion of the back plate 22 described later when the main collection unit 20 rotates at high speed, and the linear material 21b The tip may swell rearward. Therefore, it is necessary to make the diameter of the rotating brush body 21 slightly longer than the diameter of the back plate 22 in order to prevent the tip of the linear material 21b from entering the back side of the window portion of the back plate 22. The same effect can be obtained even if the diameter of the rotating brush body 21 is slightly shorter than the diameter of the back plate 22.

  A window portion 22a as a vent hole is punched and provided at a position corresponding to the back surface of the distal end portion of the linear material 21b of the rotating brush body 21. The window portion 22a is partitioned by a vertical frame portion 22b arranged along the radial direction with respect to the window portion 22a and an arc frame portion 22c arranged along the circumferential direction so as to cross the window portion 22a.

  The back plate 22 shown in FIG. 3 is partitioned by an outer arc frame portion 22c which is an outer peripheral edge and two inner arc frame portions 22c, and a double window portion 22a is arranged in the radial direction. There is no problem even if the appropriate number of arc frame portions 22c is adjusted so that the portion 22a is single or triple in the radial direction.

  Moreover, since the linear raw material 21b arrange | positioned at the center of the backplate 22 is arrange | positioned densely as it goes to the center, there is not enough space for gas to pass through. Accordingly, it is not necessary to provide the window 22 a for allowing gas to pass through the center of the back plate 22, so the window 22 a may be provided only in the vicinity of the outer periphery of the back plate 22. By providing a plate surface without providing the window portion 22a at the center of the back plate 22, the overall rigidity of the back plate 22 can be increased.

  A plurality of screws 23 are screwed into screw holes 22d provided in the back plate 22 through screw through holes 21c of the disk portion 21a of the rotating brush body 21, and the back plate 22 is attached to the rear surface of the disk portion 21a. It is fixed. A rotating shaft 17 that faces the horizontal direction of the electric motor 16 from the rear is fixed at the center of the disc portion 21a, and the fan 14 is also fixed to the rotating shaft 17 between the main collection unit 20 and the electric motor 16. The fan 14 and the rotating brush body 21 are both rotated by driving the electric motor 16.

  In addition, the main collection part 20 can also be made into the metal rotating mesh body 24 as shown in FIG. The rotating mesh-like body 24 is provided with a plurality of frame portions 24b around a disc 24a, and a net-like main collection filter 24c is disposed in the frame portion 24b. And the rotating shaft 17 of the electric motor 16 coaxial with the fan 14 is being fixed to the center part of the disc 24a. The main collection filter 24c is made of a synthetic resin or metal wire having a mesh of about 100 mesh.

  Around the rotating brush body 21 (or the rotating mesh body 24) installed in the box 10, the sub-collecting unit 30 shown in FIG. 5 is arranged in a substantially annular combination as shown in FIG. The sub-collecting unit 30 is fixed in the box 10 by screws or the like. A substantially annular, for example, regular octagonal front plate 31 is provided at the front end of the sub-collecting unit 30, and an annular rear plate 32 is similarly provided at the rear end of the sub-collecting unit 30. A cylindrical frame 33 is arranged on the top.

  The front plate 31 is provided with a plurality of fixing holes 34 for fixing in the box body 10, and a circular hole 35 having an inner diameter slightly larger than the rear plate 22 of the rotating brush body 21. Is provided. Further, the rear plate 32 is also provided with a small hole 36 in the center, and the small hole 36 is slightly smaller than the hole 35 of the front plate 31.

  The cylindrical side surface portion of the frame portion 33 is divided into several sections, and a plurality of mesh-like sub collection filters 37 made of synthetic resin or metal are stretched in these sections. The sub-collecting filter 37 has a mesh of about 100 mesh made of synthetic resin or metal wire having a diameter of about 0.1 mm, for example.

  A part of the box 10 to which the front plate 31, the rear plate 32, the frame body 33, and the front plate 31 of the sub-collecting unit 30 are attached also serves as the partition plate 12 that partitions the gas flow path in the box 10. Yes.

  Note that the front plate 31 of the sub-collecting unit 30 is not limited to the octagonal shape of the embodiment, and may be a substantially annular shape surrounding the main collecting unit 20. Further, the sub-collecting filter 37 may be arranged in a single ring shape even if it is not divided into a plurality of parts.

  In operation, when the electric motor 16 disposed on the back side of the box 10 is driven, the fan 14 and the main collection unit 20 rotate at high speed via the rotating shaft 17. Due to the pressure difference generated by the rotation of the fan 14, a gas containing oil is sucked from the suction port 13 into the box 10 from the left to the right as shown by the arrows in FIG. From the back to the back.

  The gas flows from the rotating brush body 21 on the front side toward the back plate 22 on the back side, and most of the gas flows as shown by the arrows in FIG. Pass through force through 22a.

  In the main collection part 20, the rotating brush body 21 rotates at a speed of, for example, 3000 rpm, and the oil content in the gas collides with the linear material 21b and is attached to and captured by the linear material 21b. The gas that has passed through the main collection part 20 flows upward and is discharged from the discharge port 15 to the outside of the box 10 as indicated by the arrow in FIG.

  In this collection process, the oil content captured by the linear material 21b is agglomerated on the linear material 21b and remains on the linear material 21b as a lump, but most of the oil content is a rotating brush body. It is separated from the linear material 21b by the centrifugal force generated when the 21 rotates at a high speed and the vibration force of the linear material 21b, and the outer circumferential direction together with the airflow in the outer peripheral direction generated when the rotating brush body 21 rotates at a high speed. Blown away.

  The oil scattered in the outer peripheral direction collides with the sub-collecting filter 37 of the sub-collecting unit 30 installed so as to surround the rotary brush body 21 together with the air flow generated by the high-speed rotation of the rotary brush body 21. When it hits, the oil component adheres to the sub-collecting filter 37 and the gas passes through. The adhering oil becomes liquid on the surface of the sub-collecting filter 37, moves while flowing down to the lower part due to gravity, and is collected in an oil pan 19 provided at a predetermined position below the box 10.

  Even in the case of using the rotating mesh body 24 shown in FIG. 4 for the main collection unit 20, the oil component is captured by the main collection filter 24c, and moved in the outer peripheral direction by the centrifugal force acting on the oil component, Eventually, it will be blown off around the rotating mesh body 24 along with the air flow generated in the outer peripheral direction, and will adhere to the sub-collecting section 30. Oil captured by the main collection filter 24c is less likely to scatter outward than the rotating brush body 21 due to the mesh of the main collection filter 24c.

  On the other hand, the gas by the leak flow which goes around between the hole 35 of the front plate 31 of the sub collection part 30 and the outer periphery of the rotary brush body 21 exists without passing through the main collection part 20. This gas that has come around has a negative pressure on the outside of the sub-collecting portion 30 than on the inside, and therefore, in many cases, between the front plate 31 and the rear plate 32 of the sub-collecting portion 30, That is, it is sucked up and down in the explanatory view of the passing gas in FIG.

  At the same time, the gas caused by the leaked flow flows between the front plate 31 and the rear plate 32 of the sub-collecting unit 30 from the inside to the outside, even by the air flow in the outer circumferential direction generated by the rotating brush body 21 rotating at high speed. Therefore, the contained oil component is sucked and passed by the sub-collecting filter 37 attached to the frame body portion 33 and captured.

  Further, by providing the rear plate 32 in the sub-collecting unit 30, the leak flow is blocked and the gas easily flows in the direction passing through the sub-collecting filter 37. Note that there is no problem even if the rear plate 32 is not provided in the sub-collecting unit 30.

  The gas from which the oil has been removed by passing through the sub-collecting filter 37 is discharged from the discharge port 15 together with the gas that has passed through the main collecting portion 20 as shown by the arrows in FIGS. Is done.

  Then, the oil component collected when the gas passes through the sub-collecting unit 30 is blown along with the sub-collecting filter 37 together with the oil component blown off by the main collecting unit 20 and attached to the sub-collecting filter 37. It flows downward, falls from the lower part of the sub-collecting filter 37 and is stored in the oil pan 19. The accumulated oil is extracted from the pipe portion 18 to the outside at an appropriate time interval.

  In the embodiment, the fan 14 and the main collection unit 20 are operated by the same electric motor 16. However, the fan 14 and the main collection unit 20 may be rotated by separate electric motors, for example, in order to make the rotation speed different.

  In addition, when a comparative experiment was conducted by generating an air flow containing a predetermined amount of oil at a constant wind speed depending on whether or not the sub-collecting unit 30 is provided in the box 10, the sub-collecting unit 30 is In the box 10 not provided, the collection efficiency η indicating the ratio of collection was 87.2%. On the other hand, in the box 10 provided with the sub-collecting part 30, the collection efficiency η reached 95.5%. In other words, 12.8% of the oil that could not be removed was reduced to 4.5% by providing the sub-collecting unit 30, and about 65% of the oil that could not be removed was reduced to 4.5%. It is collected by the sub-collecting unit 30.

DESCRIPTION OF SYMBOLS 10 Box body 12 Partition plate 13 Inlet port 14 Fan 15 Outlet port 19 Oil pan 20 Main collection part 22 Back plate 24 Rotating mesh body 30 Subcollection part 31 Front plate 32 Rear surface plate 37 Subcollection filter

Claims (6)

  In order to forcibly generate an airflow so that the gas passes through the passage, and a box that is provided with a suction port and a discharge port and is sealed, a partition plate that partitions the gas so as to pass through a predetermined passage, A main collector that has a disk-shaped collector that rotates at high speed and captures the oil component contained by passing gas, and is fixed in a substantially annular shape around the main collector. An oil mist trap, comprising: a sub-collector that captures the oil component contained by passing a gas that has circulated around the main collector without passing through the main collector Collector.   2. The oil mist collecting device according to claim 1, wherein one or more collecting filters are provided on a cylindrical side surface of the sub-collecting unit.   The oil mist collecting device according to claim 1, wherein an annular rear plate is provided at a rear end of the sub-collecting unit.   The oil mist collecting device according to any one of claims 1 to 3, wherein the sub-collecting unit allows gas to pass from the inside to the outside.   The said sub collection part flows down the oil part which was blown off from the said main collection part, and was attached, and the oil part caught by the said sub collection part, The any one of Claims 1-4 characterized by the above-mentioned. An oil mist collecting device according to one claim.   6. The oil mist collecting device according to claim 5, wherein the oil that has flowed down through the sub-collecting unit is stored in a lower portion of the box.

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