JP6531157B2 - Oil mist collector - Google Patents

Description

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

  In the working place of metal processing industry such as a factory for manufacturing automobile parts, cutting oil on the surface etc. of metal etc. in order to prevent the temperature rise at the time of cutting, grinding and forging metal etc. and to improve the machinability etc. Supply and adhere. However, along with this work, misty oil mist including oil and cutting powder is generated at the time of processing.

  If this oil mist is left, all parts in the plant become covered with oil. For example, if it adheres to a fluorescent lamp or a floor surface, the worker may slip and be injured, which may cause deterioration of the working environment such as darkening of the lamp.

  From such a thing, the limit value of the oil mist concentration may be determined from the viewpoint of environmental hygiene depending on the factory, and the oil mist collecting device with high collection efficiency is required.

  An apparatus for efficiently collecting oil and the like from oil mist has been widely used conventionally. For example, Patent Document 1 discloses an oil mist collector device, and the oil mist sucked into the device casing by the oil mist collector device collides with the rotating oil mist treated plate to utilize centrifugal force. The oil content is blown toward the inner wall surface of the device casing, and the oil content is adhered to the inner wall surface to collect the oil content.

  Further, 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 and the like, and the same as in Patent Document 1 by rotating this rotating brush body. In addition, the oil component is scattered in the circumferential direction of the rotating brush body using centrifugal force to separate and collect the oil component from the oil mist.

  This rotating brush has an advantage of less clogging since oil components are separated in the circumferential direction by centrifugal force as compared with a rotating disk provided with a conventional mesh portion.

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

  However, the oil removal devices of Patent Documents 1 and 2 have a problem that the collection efficiency of the oil content is reduced due to the leak flow not passing through the rotating body which continues to be operated in high speed rotation.

  An object of the present invention is to provide an oil mist collecting apparatus which solves the above-mentioned problems and efficiently collects and removes an oil component in gas.

An oil mist collecting apparatus according to the present invention for achieving the above object comprises a sealed box having an inlet and an outlet, and a partition plate for partitioning gas so as to pass through a predetermined passage in the box. If, for gas to generate a forced air flow to pass through said passageway fan and has a disk-shaped rotary brush body rotating at high speed, the rotary brush oil fraction containing by passing gas The secondary collection part which has a collection part which collects with the body, and a cylindrical frame part which provided one or more collection filters on the side, and which frame part was installed around the collection part a oil mist collecting device equipped with a preparative, the collection filter is captured in said gas elaborate around the periphery of the collecting portion is passed Rutotomoni the rotary brush member without passing through the collecting unit It is to current capturing the oil component that is blown around by the centrifugal force, pass through the collector It is characterized in that the gas which has passed only through the collection filter is discharged together with the gas which has passed through the collection part together from the discharge port .

  According to the oil mist collecting apparatus according to the present invention, the gas by the leak flow which wraps around the tip of the linear material of the rotating brush body to the outside without passing through the rotating brush body of the collecting portion By being sucked by the collection unit, the oil component in the gas can be efficiently collected and removed.

It is an external appearance perspective view of an oil mist collection device. It is a cross-sectional view of an oil mist collection apparatus. It is a disassembled perspective view of a collection part. It is a perspective view of a collection part. It is a perspective view of a secondary collection part. It is a front view of the state which combined the collection part and the secondary collection part. It is explanatory drawing of the gas which passes a collection part and a secondary collection part. It is a double logarithmic graph figure of the thickness of the width direction of the front-end | tip of a linear raw material, and the transmittance | permeability. It is a perspective view of the collection part which made the linear raw material wavy.

The present invention will be described in detail based on the illustrated embodiments.
FIG. 1 is an external perspective view of an oil mist collecting apparatus, and FIG. 2 is a cross-sectional view. The oil mist collecting apparatus has a sealed box 10, and an open / close door 11 for performing an internal maintenance etc. is attached to the side of the box 10 by a hinge.

  In the box 10, a gas is divided so as to circulate through a predetermined passage, and a partition plate 12 for that purpose is provided. The gas in which oil, cutting powder, etc. is in the form of mist is put into the box 10 by a fan 14 composed of, for example, a turbo fan which rotates in the box 10 from a cylindrical suction port 13 provided at the center of the front of the box 10 It is sucked.

  The sucked gas passes through the collection unit 20 and the secondary collection unit 30 to remove oil components including cutting powder and the like in the gas. The gas from which the oil is collected and removed is discharged from a grid-like outlet 15 at the top of the box 10.

  The fan 14 is fixed to the rotating shaft 17 of the motor 16, and the pipe portion 18 at the lower front of the box 10 is for collecting and removing the oil collected in the oil pan 19 provided at the lower portion of the box 10. This is a removal port provided with a cock not shown.

  Further, among the illustrated arrows, the arrows filled with dots indicate the flow of gas containing oil mist, and the arrows without dots indicate the flow of gas from which the oil mist has been collected and removed.

  As shown in FIG. 3, the collection portion 20 is composed of a rotating brush body 21 and a back plate 22, and as shown in FIG. 4, the rotating brush body 21 and the back plate 22 are integrally bonded. .

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

  In addition, the diameter of the rotating brush body 21 is, for example, about 30 cm in diameter, but according to the size of the installation place, an appropriate size is used, and the linear material 21b has elasticity and flexibility. Although it is preferable to use synthetic resin, it may be made of metal without any problem.

  The linear material 21b is arranged in a plurality in the thickness direction of the rotary brush body 21, but the filling rate of the linear material 21b, that is, the ratio of the linear material in the predetermined space is the rotary brush body 21. The higher the packing ratio, the greater the collection efficiency. Moreover, the wire diameter of the linear raw material 21b is about 0.1-0.5 mm, for example, and collection efficiency is so high that a wire diameter is thin. However, as the filling rate increases and as the wire diameter decreases, clogging by the oil tends to occur more easily.

  Therefore, if the linear material 21b is too thin, the collection efficiency is high at the beginning of use, but the oil clogging will occur with the passage of time, and the collection efficiency will be significantly reduced. Therefore, by appropriately selecting the filling rate and the wire diameter of the linear material 21b, it is possible to alleviate the clogging of the oil over time, that is, the decrease in the collection efficiency.

  The back plate 22 provided on the downwind side of the rotating brush body 21 and provided behind is made of an annular metal plate or the like, and is a vent at a position corresponding to the back surface where the linear material 21b of the rotating brush body 21 is located. The window portion 22a of the is punched and provided. The window 22a is partitioned by the vertical frame 22b disposed in the radial direction with respect to the window 22a and the arc frame 22c disposed in the circumferential direction so as to cross the window 22a.

  The back plate 22 shown in FIG. 3 is divided by the outer arc frame 22c which is the outer peripheral edge and the two inner arc frames 22c, and the double windows 22a are disposed in the radial direction. There is no problem even if the number of the arc frame portions 22c is appropriately adjusted so that the portions 22a become single or triple or more in the radial direction.

  The diameter of the rotating brush body 21 is made equal to or slightly shorter than the diameter of the outer peripheral edge of the back plate 22, and the tip of the linear material 21 b is sufficient for the arc frame 22 c of the outermost edge of the back plate 22. I try to overlap.

  If the tip of the linear material 21b does not sufficiently overlap the arc frame 22c of the outermost periphery, the tip of the linear material 21b is on the back side of the window of the back plate 22 when the collecting portion 20 rotates at high speed. The tip end of the linear material 21b is expanded backward by intruding.

  Therefore, in order to prevent the end of the linear material 21b from entering the back side of the window of the back plate 22, the end of the linear material 21b is sufficiently overlapped with the outermost arc frame 22c. There is a need. The same effect can be obtained when the diameter of the rotating brush body 21 is slightly longer than the diameter of the outer peripheral edge of the back plate 22.

  Conversely, when the diameter of the rotary brush body 21 is too long with respect to the diameter of the outer peripheral edge of the back plate 22, a portion of the linear material 21b longer than the back plate 22 when the collecting portion 20 rotates at high speed. Is bulging rearward of the back plate 22, and repeatedly collides with the outer peripheral edge of the back plate 22, so that there is a problem that the linear material 21b becomes short.

  Therefore, in order to prevent the linear material 21 b from being worn out by repeated collisions with the back plate 22, the diameter of the rotating brush body 21 is slightly longer than the diameter of the outer peripheral edge of the back plate 22 as described above. preferable.

  Also, if the length of the vertical frame 22b of the window 22a is too long in the radial direction, the diameter of the rotary brush body 21 is set back when the linear material 21b is bent when the collection unit 20 is rotating at high speed. Even when the diameter of the outer peripheral edge of the face plate 22 is slightly longer, the linear material 21 b may enter the back side of the window 22 a of the back plate 22.

  As a result, the front end of the linear material 21b bulges backward, and the linear material 21b is frayed by repeated collisions with the arc frame 22c, resulting in a problem that the linear material 21b becomes short. Therefore, it is necessary to appropriately adjust the number and interval of the vertical frame 22b and the arc frame 22c of the window 22a so that the length of the vertical frame 22b is not too long 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, the clearance gap which gas passes through is not enough. Accordingly, it is not necessary to provide the window 22 a for passing gas in the central portion 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-like shape without providing the window portion 22 a at the central portion of the back plate 22, the overall rigidity of the back plate 22 can be increased.

  A plurality of screws 23 are screwed into the screw holes 22 d provided in the back plate 22 via the screw through holes 21 c of the disc portion 21 a of the rotating brush body 21, and the back plate 22 is formed on the back surface of the disc portion 21 a. It is fixed. A rotating shaft 17 facing the horizontal direction of the motor 16 from behind is fixed at the center of the disc portion 21 a, and the fan 14 is also fixed to the rotating shaft 17 between the collecting unit 20 and the motor 16. The fan 14 and the rotating brush body 21 rotate together by the drive of the electric motor 16.

  The secondary collection unit 30 shown in FIG. 5 is disposed in a substantially annular combination as shown in FIG. 6 around the rotating brush body 21 installed in the box 10. Is fixed in the box 10 by screwing or the like. A substantially annular, for example, a regular octagonal front plate 31 is provided at the front end of the secondary collection unit 30, and an annular rear plate 32 is also provided at the rear end of the secondary collection unit 30 in the same manner. The cylindrical frame portion 33 is disposed on the

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

  The cylindrical side portion of the frame portion 33 is divided into several sections, and in these sections, a plurality of mesh-like collection filters 37 made of synthetic resin or metal are stretched. For example, a synthetic resin or metal wire having a diameter of about 0.1 mm is a mesh of about 100 mesh. The front plate 31 of the sub-collection unit 30 also serves as a partition plate 12 as a flow path of gas in the box 10 together with the surrounding frame portion 33.

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

  The gas flows from the front side of the rotating brush body 21 to the back side plate 22 behind, and as shown by the arrows in FIG. 7, most of the gas is the linear material 21 b of the rotating brush body 21 and the window portion of the back side plate 22 It is forced to pass through 22a.

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

  In this collection process, the oil component captured by the linear material 21b is condensed on the linear material 21b and remains as a mass as it is on the linear material 21b, but most of the oil component is a rotating brush body 21 is separated from the linear material 21b by the centrifugal force generated by rotating at high speed and the vibration force of the linear material 21b, and it is blown away in the outer peripheral direction.

  The oil spattered in the outer peripheral direction collides with the air flow generated by the high speed rotation of the rotating brush body 21 and the collection filter 37 of the secondary collecting unit 30 installed so as to surround the periphery of the rotating brush body 21. When the oil collides, the oil adheres to the collection filter 37 and the gas passes. The adhered oil becomes liquid on the surface of the collection filter 37, flows down to the lower part by gravity and moves, and is collected in an oil pan 19 provided at a predetermined place in the lower part of the box 10.

  The back plate 22 is provided with a window 22a at a position corresponding to the tip of the linear material 21b, and is a vent, but since the arc frame 22c is provided in the window 22a, a line The base material 21b is supported by the arc frame 22c. Therefore, even if a strong air flow is generated from the front surface to the rear surface of the collection unit 20 due to the rotation of the fan 14, the linear material 21b is prevented from falling backward, and the filling rate of the linear material 21b is It is made for it to fall, ie, the linear raw material 21b does not swell in the gas passage direction.

  In addition, since the tip of the linear material 21b spreads forward in the width direction toward the front of the collection unit 20 when the collection unit 20 rotates at high speed, the line material of the linear material 21b is taken into consideration It is necessary to set the length and placement density.

  Then, the experimental example of the transmittance | permeability P which subtracted the collection efficiency (eta) which showed the thickness at the time of spreading to the width direction of the linear raw material 21b, and the ratio to collect from 1 was measured. As experimental conditions, the linear material 21b has a wire diameter of 0.2 mm, a length of 9 cm, a number of 15,000, and the thickness H1 of the linear material 21b near the disc portion 21a in the width direction is 3 mm and has a diameter of about 33 cm. The collection unit 20 was rotated at 2900 revolutions / minute. Then, a predetermined amount of oil was passed through the collection unit 20, and the collection efficiency η and the permeability P were calculated from the predetermined amount of oil and the oil that could be recovered.

  FIG. 8 is a double logarithmic graph showing the relationship between the transmittance P and the thickness H2 when the end of the linear material 21b is spread in the width direction at this time. It can be seen that when the thickness H2 of the tip portion of the linear material 21b expands from 3 mm before rotation to about 5 mm after rotation, the transmittance P becomes lowest, that is, the collection efficiency η becomes high. Therefore, in consideration of the fact that the arrangement interval of the linear material 21b in the vicinity of the disk portion 21a is expanded by 2 to 3 times before the rotation at the time of high speed rotation of the collection unit 20, the wire diameter and length of the linear material 21b It is necessary to select the number density and the material appropriately.

  On the other hand, there is a gas due to a leak flow that wraps the tip of the linear material 21b of the rotary brush body 21 outward without passing through the rotary brush body 21 of the collection unit 20. This gas is sucked by the air flow generated in the outside direction through the collection filter 37 in the secondary collection unit 30, that is, in the vertical direction in the explanatory view of the gas passing in FIG. 7, and the oil component is collected by the collection filter 37. Be done.

  Furthermore, the leak flow is blocked by providing the back plate 32 in the sub-collection unit 30, and the gas can easily flow in the direction of passing through the collection filter 37. There is no problem even if the back plate 32 is not provided in the secondary collection unit 30.

  The gas from which the oil component has been removed by passing through the collection filter 37 is discharged together with the gas that has passed through the collection unit 20 as shown by the arrows in FIGS. .

  Then, the oil collected by the gas passing through the secondary collection unit 30 is blown away by the collection unit 20 and flows downward together with the oil adhered to the collection filter 37, and the lower part of the collection filter 37 Drops from the oil reservoir 19 and stored in the oil pan 19. The accumulated oil is drained from the pipe section 18 at appropriate time intervals.

  Moreover, although the fan 14 and the rotating brush body 21 are operated by the same electric motor 16, when making these rotation speed different etc., it can also be made to rotate by a separate electric motor.

  In addition, when the case where the back plate 22 was not provided in the collection part 20 and the case where it was provided were compared and experimented under the above-mentioned experiment conditions, in the collection part 20 in which the back plate 22 is not provided, the linear material 21b is rotated. The thickness H2 of the tip in the width direction reached about 45 mm, and the collection efficiency 示 す indicating the collection ratio was 86.5%. On the other hand, in the collecting unit 20 provided with the back plate 22, as described above, the thickness H2 of the tip of the linear material 21b in the width direction is about 5 mm, and the collection efficiency 達 reaches 92.0%. did. In other words, 13.5% of the unremoved oil was reduced to 8% by providing the back plate 22. Of the unremoved oil, about 40% of the oil was removed from the back plate 22. It will be able to be collected by providing.

  Moreover, although the linear raw material 21b of the collection part 20 shown to FIG. 3, FIG. 4 was demonstrated using a linear thing, as shown in FIG. 9, that whose shape of linear material 21b 'is a wavy line May be adopted. When the linear linear material 21b continues to be used, the linear material 21b repeats a disintegrated and inflated state at the time of use and a non-inflated state at the time of non-use, and therefore, a part of the linear material 21b Is likely to be in close contact with the adjacent linear material 21b at all times.

  As described above, the linear raw materials 21b that are linear tend to be in close contact with each other, and when the linear raw materials 21b are in line contact with each other, an oil component is accumulated and attached between the linear raw materials 21b. Then, the linear raw materials 21b are further in close contact with each other due to the attached oil, and the linear raw materials 21b become difficult to separate.

  Therefore, as shown in FIG. 9, even if a part of the linear material 21b 'falls by making the linear material 21b' into a wavy line, a gap is easily generated between the linear materials 21b ', and the oil component There is no accumulation of

  In addition to the wavy shape, the linear material 21b 'may have a shape in which adjacent linear materials 21b' are unlikely to be in close contact with each other.

Reference Signs List 10 box 12 partition plate 13 suction port 14 fan 15 discharge port 16 motor 19 oil pan 20 collecting portion 21 rotating brush body 21 b linear material 22 back plate 22 a window portion 30 secondary collecting portion 30 front plate 32 back plate 37 Collection filter

Claims (5)

An enclosed box body provided with an inlet and an outlet, a partition plate for partitioning gas so as to pass through a predetermined passage in the box body, and air flow forcibly generated so that the gas passes through the passage A collection portion having a fan for rotating and a disk-shaped rotating brush body rotating at a high speed, and a gas is allowed to pass and the oil contained therein is captured by the rotating brush body, and one or more collection filters An oil mist collecting apparatus comprising: a cylindrical frame portion provided on a side surface; and a secondary collection portion having the frame portion installed around the collection portion ,
The collection filter, capturing the oil component that is blown around in captured centrifugal force by the collector Rutotomoni the rotary brush member is passed through a gas elaborate around the periphery of without passing through the collecting unit Collect
An oil mist trap is characterized in that the gas that has passed only through the collection filter without passing through the collection unit is discharged together with the gas that has passed through the collection unit together from the discharge port. Collector. The oil mist collecting apparatus according to claim 1 , wherein an annular back plate is provided at a rear end of the auxiliary collecting unit. The oil mist collecting apparatus according to claim 1 or 2 , wherein the sub-collection unit passes gas from the inside to the outside. The oil mist collecting apparatus according to any one of claims 1 to 3 , wherein the secondary collection portion flows the collected oil downward and drops it. The oil mist collecting apparatus according to claim 4 , wherein the oil that has flowed down through the sub-collection unit is stored in the lower part of the box.

Images