JP2004306144A - Coolant contaminant separating device and coolant contaminant separation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coolant contaminant separating device and a coolant contaminant separation method, operated at low cost and simply, and efficiently separating contaminant from a coolant. <P>SOLUTION: In supplying a coolant containing contaminant to a rotating tub 21 having a substantially axisymmetric inner wall to a predetermined rotating shaft 23 to separate the contaminant from the coolant by centrifugal force, a supply disk 31 is oriented substantially vertical to the rotating shaft of the rotating tub in the interior of the rotating tub, and provided with a supply passage 23a opened at the outer peripheral part and serving as a supply passage for the coolant containing contaminant, and a collecting disk 30 is oriented substantially vertical to the rotating shaft of the rotating tub in the interior of the rotating tub, and provided with a collecting passage 23b opened at the outer peripheral part and serving as a collecting passage for the coolant containing contaminant. The disk 30 is disposed so that the outer peripheral part is positioned in the inside of the steady-state coolant liquid level. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a coolant mixture separation device and a coolant mixture separation method, and more particularly to a coolant mixture separation device and a coolant mixture separation method for separating a mixture in a coolant by a specific gravity difference.
[0002]
[Prior art]
When cutting, grinding and the like are performed by a machine tool for metal working, a coolant is used for lubrication, cooling, chip scattering prevention, and the like. Chips generated by cutting, grinding and the like are mixed in the coolant. However, if the mixing ratio is high, it is inconvenient for lubrication or the like. Therefore, when the coolant is reused, contaminants such as chips are removed. As a conventional coolant contaminant separation device for removing contaminants such as chips, a device for collecting contaminants using a magnet, a fine filter, and a device for removing contaminants by centrifugation are known. (For example, Patent Document 1)
[0003]
[Patent Document 1]
JP-A-10-174902
[0004]
[Problems to be solved by the invention]
In the conventional coolant contaminant separation apparatus described above, it has been difficult to repeatedly and simply collect a coolant that can withstand reuse at low cost.
That is, in the configuration in which the contaminant is recovered by the magnet, it is difficult to remove the fine contaminant floating in the coolant, and it is difficult to separate the contaminant using a non-magnetic material such as aluminum. In the configuration using a fine filter, complicated maintenance management such as cleaning and replacement of the filter is required on a daily basis, and replacement cost of the filter is required, resulting in high cost. Furthermore, the removal rate of the contaminant is not sufficient in the removal of the contaminant by centrifugation, and the concentration of the contaminant has been increased by repeatedly using the coolant.
The present invention has been made in view of the above problems, and provides a coolant mixture separation apparatus and a coolant mixture separation method that can be easily operated at low cost and can efficiently separate a mixture from a coolant. Aim.
[0005]
Means for Solving the Problems and Effects of the Invention
In order to achieve the above object, an invention according to claim 1 is to supply a coolant containing a contaminant to a rotary tank having an inner wall substantially axially symmetric with respect to a predetermined rotation axis, and to mix the contaminant and the coolant by centrifugal force. A coolant contaminant separating device, which is oriented substantially perpendicularly to the rotation axis of the rotary tub inside the rotary tub, is opened at an outer peripheral portion thereof, and supplies a coolant supply passage containing the contaminant. And a disk-shaped coolant supply means having a supply path formed therein.
[0006]
In the invention according to claim 1 configured as described above, the coolant is supplied to a rotary tank that rotates with respect to a predetermined rotation axis. As the rotary tub is rotated, the supplied coolant rotates together with the rotary tub, and is urged toward the inner wall of the rotary tub by centrifugal force. Therefore, while the rotating tub is rotating at a predetermined rotation speed, the coolant is kept urged in the direction of the inner wall of the rotating tub, and the material in the coolant is directed in a direction perpendicular to the rotation axis due to a difference in specific gravity of the material in the coolant. To separate. That is, the contaminants mixed into the coolant and having a density higher than the density of the coolant accumulate along the inner wall of the rotary tank, so that the clear coolant on the rotation center side and the contaminants can be separated.
[0007]
In the present invention, the disk-shaped coolant supply means is oriented substantially perpendicularly to the rotation axis of the rotary tub, and a supply path that opens to the outer periphery of the disk is formed inside the disk. Supplies the coolant substantially radially. With this configuration, it is possible to prevent the coolant level during rotation from being disturbed. In other words, when supplying coolant from a disk oriented perpendicular to the rotation axis, if the coolant flies from the opening of the supply path to the rotating coolant level, the coolant supplied The coolant level is disturbed.
[0008]
Comparing the case where a certain amount of coolant is supplied at one location and the case where the coolant is supplied radially, the latter has less disturbance of the liquid level at the contact position between the supplied coolant and the liquid level of the coolant. In the configuration in which the contaminants are separated by centrifugation, turbulence occurs in the coolant liquid due to the turbulence of the liquid surface, and the contaminants separated in the direction of the inner wall cause mixing with the coolant again. However, in the present invention, since the coolant is supplied in a substantially radial manner, when a unit amount of the coolant is supplied to the coolant level, the contact position between the supplied coolant and the coolant level can be dispersed. Can be effectively reduced. Therefore, the coolant level during rotation can be prevented from being disturbed, and the coolant and the contaminants can be effectively separated.
[0009]
The coolant supply means in the present invention only needs to be able to supply coolant radially. Here, "radially" means that the coolant is supplied in a plurality of directions from the rotation center side of the rotary tank toward the outside, and the number of supply paths is not limited as long as the coolant can be supplied radially. Specifically, a plurality of supply passages having a predetermined width may be formed, and coolant may be supplied from a plurality of openings, or two thin plates are connected at a fixed distance and connected between these thin plates. The supply path may be used to open the entire periphery of the outer periphery of the disk. Further, since the coolant supply means is a disk oriented substantially at right angles to the rotation axis of the rotary tub, it is possible to supply coolant radially very easily. In the coolant supply means, it is only necessary to be able to supply coolant radially, so that the outer periphery of the disk is substantially circular and the plate surface may be oriented substantially perpendicular to the rotation axis, and the thickness is There is no particular limitation.
[0010]
The rotary tub performs a rotary motion relative to the rotary shaft. However, in a disk-shaped coolant supply means, the rotary tub may rotate relative to the rotary tub or may be fixed relatively. That is, in a configuration in which the rotary shaft is fixed and the rotary tub is rotated around the rotary shaft, the coolant supply means that rotates relative to the rotary tub by fixing the disc-shaped coolant supply means to the rotary shaft. Means can be provided. If the supply path for supplying the coolant is formed by a rotary joint or the like, the coolant supply means can be configured to rotate relative to the rotation axis. If the coolant supply means rotates, the relative speed in the rotating direction between the rotating coolant level and the flying coolant can be reduced or set to “0”, and the liquid level can be prevented from being disturbed.
[0011]
The rotary tub only needs to be able to rotate the coolant by the rotation of the rotary tub itself and to accommodate the rotating coolant in the tub, and it is sufficient that the rotary tub has an inner wall that is axially symmetric with respect to the rotation axis. That is, any rotary tub having an inner wall substantially equidistant from the rotary shaft may be used. Specifically, a cylindrical inner wall or the like can be adopted. Of course, other shapes can be adopted, and various shapes such as a shape in which the diameter of the inner wall gradually changes can be adopted.
[0012]
As a preferred example of a configuration for suppressing the turbulence of the coolant liquid level, in the invention according to claim 2, by rotating the rotary tank, a centrifugal force is applied to the coolant toward the inner wall of the rotary tank so that the coolant liquid is rotated. In a steady state in which the surface is substantially circular, the outer periphery of the disk is arranged near the coolant level and closer to the rotation axis than the coolant level.
[0013]
That is, the flying distance of the coolant supplied to the liquid surface is made as small as possible in order to suppress the disturbance of the liquid surface of the coolant. If the flying distance of the coolant supplied to the liquid surface is short, the flow rate of the supplied coolant supplied from the opening of the disk can be reduced, so that the turbulence of the liquid surface of the coolant can be suppressed very small. Therefore, the contaminants in the coolant can be effectively separated.
[0014]
In the present invention, since the contaminants in the coolant are separated by centrifugal force, the liquid level of the coolant changes depending on various conditions such as the rotation speed of the rotary tank, the volume of the rotary tank, the supply amount of the coolant, and the viscosity of the coolant. By making these conditions constant or adjusting them, the coolant level during operation of the coolant contaminant separation apparatus according to the present invention can be made substantially constant. This state is called a steady state. By realizing this steady state, it is possible to configure so that the outer periphery of the disk is located at a predetermined position that does not touch the liquid surface but is in the vicinity thereof.
[0015]
The distance between the outer periphery of the disk and the coolant level may be as close as possible as long as the contaminant recovery rate that can withstand the reuse of the coolant can be realized by suppressing the disturbance of the liquid level. However, if the outer periphery of the disk contacts the coolant level, the liquid level is disturbed. Of course, accidental contact between the two in response to the liquid surface being slightly disturbed is not completely excluded, but it is sufficient that both are separated in a steady state.
[0016]
Further, as a preferable example of a configuration for suppressing the turbulence of the coolant level, in the invention according to claim 3, the supply channel has an opening direction at an acute angle with respect to a tangent to an outer peripheral portion, and the coolant is rotated by the rotation of the rotary tank. The opening is configured to be supplied while having a rotation component in the same direction as the direction. That is, the supply coolant flies with respect to the liquid surface due to the relative speed between the coolant liquid surface and the coolant supplied to the liquid surface, but in the supply coolant, a component parallel to the rotation direction of the liquid surface is as small as possible. Preferably, it is small.
[0017]
Therefore, in a configuration in which the coolant level is relatively rotated with respect to the outer circumference of the disk of the coolant supply means, the opening of the supply path is formed at an acute angle with respect to the tangent of the outer circumference and in the rotation direction of the rotary tank (that is, the level of the liquid level). (Rotation direction). Thus, the supply coolant flies while having a rotation component in the same direction as the rotation direction of the liquid surface, and the disturbance of the liquid surface when contacting the liquid surface can be suppressed.
[0018]
In the present invention, one of the objects is to efficiently separate the contaminant and the coolant, and in this sense, in addition to suppressing the disturbance of the liquid level when supplying the coolant as described above, the liquid level is also reduced when collecting the coolant. It can also be realized by a configuration that suppresses the disturbance. Therefore, in the invention according to claim 4, the coolant containing the contaminant is supplied to the rotary tank having the inner wall that is substantially axially symmetric with respect to the predetermined rotation axis, and the contaminant and the coolant are separated by the centrifugal force. A coolant contaminant separation device, which is oriented substantially perpendicular to the rotation axis of the rotary tub inside the rotary tub, opens at an outer peripheral portion thereof, and serves as a recovery passage for the coolant containing the contaminant. In the steady state in which the liquid level of the coolant is made substantially circular by applying a centrifugal force in the direction of the inner wall of the rotary tub to the coolant by rotating the rotary tub, A configuration is provided in which coolant collecting means is provided, in which the collecting member is disposed so that the outer peripheral portion is located inside the coolant liquid level.
[0019]
That is, the coolant is collected by the same member as the disk-shaped coolant supply means, but the outer peripheral portion of the disk is arranged inside the coolant level in order to perform the collection. If the outer peripheral portion of the disk is arranged inside the coolant level, the recovery path in the recovery member opens inside the coolant level, so that a pressure difference is generated between the opening of the recovery path and the other end. This allows the coolant to be recovered. The recovery member in the coolant recovery means is disk-shaped, and the coolant level on which the centrifugal force is acting is axially symmetric with respect to the rotation axis and is substantially circular. By arranging, the outer peripheral portion can be arranged in the liquid surface over the entire circumference.
[0020]
If the member is located within the coolant level at a part of the coolant level, the coolant may be disturbed due to generation of bubbles at the boundary between the member and the rotating liquid level. Since the entire circumference of the portion is disposed within the liquid level, it is possible to prevent bubbles from being generated and to suppress disturbance of the liquid level. Therefore, the contaminants and the coolant can be effectively separated by centrifugation. In order to collect the coolant, the contaminants are separated by centrifugation, and the clarified coolant is collected. Therefore, the opening at the outer peripheral portion is preferably as close as possible to the coolant level.
[0021]
Further, as an example of a configuration that enables the coolant to be efficiently collected, in the invention according to claim 5, the opening direction of the collection path is an acute angle with respect to a tangent to the outer peripheral portion, and the coolant is rotated by the rotation of the rotary tank. A configuration is adopted in which an opening is provided so as to be collected while having a rotational component in the same direction as the direction. In other words, a clear coolant can be recovered by generating a pressure difference between the opening and the other end in the recovery path, but when the rotating coolant flows into the opening of the recovery path, the inertia of the coolant is reduced. The smaller the resistance component is, the more smoothly the coolant can be collected without disturbing the flow of the coolant.
[0022]
Therefore, in a configuration in which the coolant is relatively rotated with respect to the collecting member of the coolant collecting means, the opening of the collecting path is formed at an acute angle with respect to the tangent of the outer peripheral portion and in the rotation direction of the rotary tank (that is, the liquid surface rotation direction). Orientation in the opposite direction. As a result, the coolant flows into the opening while having a rotation component in the same direction as the liquid surface rotation direction, and the coolant can be recovered smoothly and without disturbing the flow. Therefore, the contaminants and the coolant can be efficiently separated by centrifugation.
[0023]
In the present invention, in order to separate the coolant and the contaminants, it is possible to adopt a configuration including both the above-described coolant supply means and coolant recovery means. In this case, as a preferred configuration example, in the invention according to claim 6, the coolant containing the contaminant is supplied to a rotating tank having an inner wall substantially axially symmetric with respect to a predetermined rotation axis, and the contaminant is supplied by centrifugal force. A coolant contaminant separation device for separating the coolant and the coolant, wherein the coolant is oriented substantially perpendicularly to the rotation axis of the rotation tub inside the rotation tub, opened at the outer peripheral portion thereof, and contains the contaminant. A disk-shaped coolant supply means in which a supply passage serving as a supply passage is formed, and the inside of the rotation tank is oriented substantially perpendicular to a rotation axis of the rotation tank, and is opened at an outer peripheral portion thereof and the contaminant is mixed. A recovery member in the form of a disc having a recovery path formed as a recovery path for the coolant including the coolant is provided, and by rotating the rotary tub, a centrifugal force acts on the coolant toward the inner wall of the rotary tub. A coolant collecting means provided with the collecting member such that the outer peripheral portion is located inside the coolant liquid level in a steady state where the coolant liquid level is substantially circular; A disc-shaped member to be provided, and a separator disposed so that an outer peripheral portion of the disc-shaped member is closer to an inner wall of the rotating tank than an outer peripheral portion of the recovery member in the steady state. is there.
[0024]
That is, the coolant is continuously supplied to the rotary tank by the coolant supply means while the coolant is separated from the contaminants by rotating the rotary tank, and the coolant is continuously recovered by the coolant recovery means. And recovery can be performed. In the coolant supply means and the coolant recovery means, both supply and recovery of the coolant are performed by the outer peripheral opening of the disc-shaped member. However, if the openings are located close to each other, the coolant immediately after the supply is recovered. And the contaminants may not be sufficiently separated.
[0025]
Therefore, a disc-shaped member separator is disposed between the coolant supply means and the coolant recovery means as in the present invention. The outer peripheral portion of the disk in the separator is disposed at a position closer to the inner wall of the rotary tank than the outer peripheral portion of the recovery member in the steady state. Therefore, it is possible to reliably prevent the coolant immediately after being supplied from the coolant supply unit from flowing into the coolant collection unit, to reliably collect only the clear coolant, and to collect the coolant in the coolant mixture separation device. Contaminant concentrations can be reduced.
[0026]
As the cleaning of the coolant is continued by the coolant contaminant separation device of the present invention, the contaminants separated along the inner wall of the rotary tank accumulate. Therefore, in the invention described in claim 7, the coolant containing the contaminant is supplied to the rotary tank having the inner wall that is substantially axially symmetric with respect to the predetermined rotation axis, and the contaminant and the coolant are separated by the centrifugal force. In the coolant contaminant separation apparatus, a configuration is adopted in which the rotating tank is fixed to a rotating shaft vertically above the rotating tank and a vertically lower part of the rotating tank is opened with a diameter smaller than the diameter of the inner wall.
[0027]
In other words, the coolant is discharged to a space formed below the rotating tank by fixing the rotating tank to the rotating shaft vertically above and providing an opening vertically below the rotating tank. In the present invention, when centrifugal force is applied to separate the coolant and contaminants by centrifugal force, the coolant is rotated by rotation of the rotary tank, so when the rotation of the rotary tank is stopped, the coolant rotates to some extent due to its inertia. Keep doing. If the rotation of the rotary tank is kept stopped in this state, the centrifugal force is reduced, the gravity component is relatively increased, and the coolant is gradually discharged from the opening.
[0028]
Therefore, the contaminants accumulated near the inner wall of the rotary tank while the coolant is rotating due to inertia are mixed into the coolant again, and the coolant is discharged from the opening with the contaminants mixed in the coolant. . Accordingly, it is possible to automatically clean the inner wall of the rotating tank only by stopping the rotation of the rotating tank, and it can be said that the coolant contaminant separating apparatus has a self-cleaning function. The opening of the rotary tank has a smaller diameter than the inner wall of the rotary tank. Therefore, when separating the coolant and the contaminant, the coolant can be maintained between the circumference of the inner wall and the circumference of the opening by centrifugal force. Needless to say, the coolant can be collected by the above-described coolant collecting means or the like, and clear coolant can be collected.
[0029]
In a preferred embodiment, when the contaminants accumulated along the inner wall due to the rotation stop of the rotary tank are discharged together with the coolant, the invention according to claim 8 prevents the contaminants from adhering to the inner wall of the rotary tank. It employs a configuration that applies an anti-adhesion coating. That is, when centrifugal force is generated by rotation of the rotating tank, the contaminants in the coolant are urged toward the inner wall of the rotating tank, but the inner wall is coated to prevent the adhering of the contaminants. Thereby, the contaminants can be easily washed away by the inertia of the coolant when the rotary tank is stopped. The coating only needs to be able to prevent the adhesion of contaminants, and various configurations can be adopted. For example, a configuration may be adopted in which a fluorine resin may be coated, or a photocatalyst such as titanium oxide is coated to prevent contaminants from adhering as dirt with light irradiation.
[0030]
According to the ninth aspect of the present invention, the coolant containing the contaminant is supplied to the rotary tank having the inner wall substantially axially symmetric with respect to the predetermined rotation axis, and the contaminant and the coolant are separated by centrifugal force. In the coolant contaminant separation device, the rotating tank is fixed to a rotating shaft vertically above the rotating tank, and has a cooling fin in which an outer peripheral side of the rotating shaft has a cooling medium flow path formed therein. There is a configuration.
[0031]
That is, since the rotary tank rotates about a predetermined rotation axis, a sliding portion always occurs, and heat is generated when the coolant mixture separation device is driven for a long time. Since the coolant is used as cooling water, if heat is transferred to the coolant, the coolant after contaminant separation may not be able to be used immediately. However, as in the present invention, cooling fins are provided around a portion (sliding portion) where the rotary tank is axially fixed, and heat can be effectively radiated by flowing a cooling medium through the flow path, so that the sliding portion is provided. And the lubricating oil in the sliding parts can be kept at a low temperature.
[0032]
As a result, it is possible to prevent heat from being applied to the coolant. Further, even when the rotary tank is rotated at a higher speed than when the heat is not radiated by the cooling fins, heat can be prevented from being applied to the coolant. If the rotating tank can be rotated at a high speed, a larger centrifugal force can be generated. Therefore, a large centrifugal force acts on the contaminant in the coolant, and the contaminant and the coolant can be efficiently separated.
[0033]
In the cooling fin, it is sufficient that heat can be radiated by providing a cooling medium flow path inside, and various configurations can be adopted. In the present invention, if a so-called laminar fan is used to rotate the rotary tank, a mechanism for easily releasing heat can be adopted. That is, if a plurality of thin and donut-shaped cooling fins are formed vertically above the rotary tub, and a cooling medium flow path communicating between the inner peripheral side of the cooling fins and the cooling fins is formed, the rotation of the rotary tub is improved. Accordingly, air can flow through the flow path, and heat can be easily dissipated. In this case, the cooling medium is air, but of course, other mechanisms can be adopted, and water or the like can be adopted as the cooling medium.
[0034]
Furthermore, in order to reuse the collected coolant, it is preferable to suppress the growth of various bacteria in the coolant, in addition to reducing the mixing ratio of the contaminants. According to the invention described in claim 10 as a preferred configuration example, a coolant containing contaminants is supplied to a rotating tank having an inner wall that is substantially axially symmetric with respect to a predetermined rotation axis, and contaminants are supplied by centrifugal force. A coolant contaminant separation device that separates the coolant from the coolant by applying a centrifugal force to the coolant toward the inner wall of the rotating tank by rotating the rotating tank to form a substantially liquid coolant level. In this state, a sterilizing means for reducing germs in the coolant is provided in a space near the center of the rotary tank surrounded by the coolant level.
[0035]
That is, when the liquid level of the coolant is brought into a steady state by rotating the rotary tank, the coolant is urged in the circumferential direction of the rotating shaft by the centrifugal force to form a circular liquid level. Creates space. Therefore, by arranging the sterilizing means in this space, it is possible to reduce various bacteria in the coolant in the rotating tank. As a result, the collected coolant can be used repeatedly.
[0036]
In the sterilization means, various configurations can be adopted as long as the germs in the coolant can be reduced. For example, a discharge part is formed by a predetermined electrode, and a structure in which ozone is generated in a space surrounded by the coolant liquid surface by a discharge in the discharge part, or a photocatalyst such as titanium oxide is coated on an inner wall of a rotary tank, and a coolant liquid is formed. It is possible to adopt a configuration in which a light emitting portion is formed in a space surrounded by a surface, and a photocatalyst has a bactericidal action by irradiation light from the light emitting portion.
[0037]
As described above, the method of separating the contaminant and the coolant as described above and the method of promoting the reuse of the separated coolant do not necessarily need to be limited to a substantial device, and also function as the method. Items 11 to 16 relate to a configuration corresponding to the method. In other words, there is no difference that the present invention is not necessarily limited to a substantial device and is effective as a method. Of course, a method corresponding to claim 2, claim 3, claim 5, or claim 8 can also be configured.
[0038]
BEST MODE FOR CARRYING OUT THE INVENTION
Here, embodiments of the present invention will be described in the following order.
(1) Configuration of the coolant mixture separation device:
(1-1) Configuration of coolant supply disk:
(1-2) Configuration of coolant recovery disk:
(2) Operation of the coolant contaminant separation device:
(3) Other embodiments:
[0039]
(1) Configuration of the coolant mixture separation device:
FIG. 1 is a partially cutaway perspective view showing a coolant contaminant separation device according to an embodiment of the present invention, and FIG. 2 is a sectional view of a main part of the coolant contaminant separation device. In the present embodiment, the coolant contaminant separation device 10 is attached to the plate-shaped member 11 and includes a motor 12, a rotating tank 21 to which a fixed unit 20 and a cooling unit 22 are connected. The rotating shaft 23 is attached to the center of the fixed portion 20, and the fixed portion 20 is attached to the plate-like member 11 via bolts, so that the rotating shaft 23 is fixed together with the fixed portion 20 to the plate-like member 11. Are relatively fixed.
[0040]
The rotating shaft 23 is a substantially cylindrical member extending downward from above the plate-shaped member 11, and rotatably holds the cooling unit 22 via a ball bearing 24 at a lower portion thereof. The cooling unit is rotatable about a rotating shaft 23 by a ball bearing 24, and a rotating tank 21 is fixed to a lower portion thereof via bolts. Therefore, the rotating tub 21 can rotate around the rotating shaft 23 together with the cooling unit 22.
[0041]
A substantially disk-shaped gear 22d is fixed to the upper part of the cooling unit 22 via a bolt concentrically with the rotating shaft 23. At the lower part of the motor 12, a gear (not shown) is fixed to the rotating shaft, and this gear meshes with the gear 22d at a part of its outer periphery. Therefore, when the motor 12 is rotationally driven, the driving force is transmitted to the cooling unit 22 via the gear 22d, and the cooling unit 22 and the rotary tank 21 rotate. In the present embodiment, the rotational driving force of the motor 12 is transmitted by the gear 22d. However, it is needless to say that the rotational driving force may be transmitted by a belt, or various types may be used as long as the cooling unit 22 and the rotary tank 21 can be rotated. A configuration can be employed.
[0042]
A plurality of thin donut-shaped cooling fins 22a are formed on the outer peripheral portion of the cooling unit 22, and the air flow opening the upper part through the cooling unit 22 on the rotation shaft 23 side of each cooling fin 22a. A passage 22b is formed. Openings 22b1 are formed between the cooling fins 22a or below the cooling fins 22a located at the bottom. The openings 22b1 are formed over the entire outer periphery of the rotating shaft 23, but the positions of the openings 22b1 are shifted in the vertical direction of the rotating shaft 23.
[0043]
That is, the openings 22b1 adjacent to each other in the circumferential direction of the rotating shaft 23 do not open at the same position in the vertical direction, and when a certain opening 22b1 opens between two specific cooling fins 22a, the adjacent opening 22b1 does not open. The opening 22b1 is opened between the other two cooling fins 22a so that the opening position is not deviated vertically. The cooling fin 22a, the air passage 22b, and the opening 22b1 form a laminar fan. That is, when the cooling unit 22 rotates about the rotation shaft 23, an airflow directed to the outside of the rotation shaft 23 is generated in the air located between the cooling fins 22a, and the air flows from the opening above the air flow path 22b to the opening 22b1. Air flows toward.
[0044]
The air current acts to release heat generated by the rotation of the cooling unit 22 to the outside. Therefore, it is possible to prevent the grease of the ball bearing 24 from storing heat. As a result, it is possible to prevent heat from being transmitted to the rotating tank 21 and the rotating shaft 23, and to prevent the coolant from being heated when separating contaminants in the rotating tank 21. Since the coolant is used for cooling together with lubrication of various machine tools, it is possible to easily reuse the recovered coolant by preventing the recovered coolant from being heated as described later.
[0045]
The rotating tub 21 is formed of a thin plate-shaped member, and the upper side is a disk-shaped part to be bolted to the cooling unit 22 and a wall surface substantially perpendicular to the disk-shaped part. This wall surface forms an inner wall 21a having a circular inner periphery. Below the inner wall 21a, the circumference thereof becomes smaller toward the lower side, forming an inclined surface 21b. Further, the lowermost portion of the rotary tank 21 has a constant diameter and forms a cylindrical portion, and also has an opening 21c that opens downward.
[0046]
In the present embodiment, the inner wall 21a and the slope 21b are provided with a coating 21d made of a fluororesin in order to prevent adhesion of contaminants to the inner wall 21a and the slope 21b. The rotary tank 21 is composed of two members, and in the present embodiment, is connected in the middle of the slope 21b and is fixed via bolts. That is, the lower part of the rotating tub 21 can be removed by removing the bolt.
[0047]
If the lower part of the rotary tub 21 can be removed, members disposed inside the rotary tub 21 can be assembled and the inner wall 21a can be easily cleaned. Of course, in order to facilitate assembly and cleaning, it is sufficient that the rotary tank 21 is composed of two members, and the position at which these two members are connected is limited to the slope 21b as in the present embodiment. Never. For example, the connection may be made at a predetermined position on the inner wall 21a.
[0048]
Inside the rotating shaft 23, a coolant supply passage and a recovery passage are formed. That is, a columnar hole is provided at the center of the rotating shaft 23 in parallel with the center of rotation to form a supply path 23a, and a recovery path 23b is formed substantially concentrically with the supply path 23a. The supply passage 23a is open at the upper end and the lower end of the rotating shaft 23. As shown in FIG. 1, a supply pipe connected to a pump and a tank (not shown) is attached to the upper part of the supply passage 23a. Therefore, the coolant in the tank can be supplied to the supply path 23a by the operation of the pump.
[0049]
The recovery path 23b is opened at the lower end of the rotating shaft 23 and the upper end is bent substantially vertically toward the outside of the rotating shaft 23, and a part thereof communicates with the outer wall of the fixed portion 20. As shown in FIG. 1, a recovery pipe is attached to this communication part, and the recovery pipe is connected to a pump and a tank (not shown), and the pump is operated to recover the coolant.
[0050]
Flange-like members 23b and 23c are attached to the lower end of the rotating shaft 23, and a recovery disk 30 and a supply disk 31 are fixed to the flange-like members 23b and 23c via bolts. That is, the recovery disk 30 and the supply disk 31 are fixed so as not to rotate relative to the rotation shaft 23. In the recovery disk 30, a coolant recovery path is formed and communicates with the recovery path 23b. In the supply disk 31, a coolant supply path is formed and communicates with the supply path 23a. It has become. A thin disk-shaped separator 32 is interposed between the recovery disk 30 and the supply disk 31.
[0051]
(1-1) Configuration of coolant supply disk:
Next, the configuration of the supply disk 31 will be described in detail. FIG. 3 shows a bottom view (lower part in FIG. 2) and a front view (upper part in FIG. 2) of the supply disk 31 as viewed from below in FIG. As shown in the bottom view of FIG. 3, the supply disk 31 has a circular outer periphery and a circular hole 31a at the center. Four supply paths 31b are formed around the hole 31a. The supply path 31b is communicated from the hole 31a to the outer periphery of the supply disk 31. That is, the supply path 31 b is open at the outer peripheral portion of the supply disk 31.
[0052]
The supply path 31b is formed radially from the hole 31a toward the outer periphery, and the wall surface is gently bent. Therefore, the tangent to the wall surface of the supply path 31b and the tangent to the outer periphery of the supply disk 31 form an acute angle α at the opening formed by the supply path 31b at the outer periphery of the supply disk 31. In addition, a bolt hole is provided at a position equidistant from the center, and is fixed via the bolt hole. In the present embodiment, the hole 31 a penetrates the supply disk 31, but the depth of the supply path 31 b is smaller than the thickness of the supply disk 31.
[0053]
When fixed to the flange-like member 23c, the bottom view shown in FIG. 3 is oriented downward in FIG. 2, and the diameter of the supply disk 31 is adjusted with respect to the bottom as shown in FIG. A disk-shaped member 31c having the same diameter as that of the disk-shaped member 31c is attached. Further, a separator 32 is attached to the upper surface of the supply disk 31. A circular hole is formed in the center of the separator 32, and the tip of the supply path 23a can be inserted. The outer diameter of the tip of the supply passage 23a and the inner diameter of the hole formed in the separator 32 are substantially the same, and can be assembled so that coolant does not leak.
[0054]
Therefore, the supply path 23a, the hole 31a, and the supply path 31b are in communication with each other and form a series of supply paths that open at the outer periphery of the supply disk 31. The supply path 31b is connected to the bottom surface of the supply disk 31. It becomes a flow path for flowing the coolant in a substantially parallel direction. In this embodiment, it is assumed that the disk-shaped member 31c is attached to the supply disk 31 in view of easy processing, the hole 31a is formed so as to penetrate the supply disk 31, and the supply path 31b is formed. The depth is less than the thickness of the supply disk 31. However, the supply path 31b only needs to be able to form a flow path of the coolant supplied from the supply path 23a, and the supply path 31b is formed by making a hole from the outer peripheral portion toward the center hole. Other configurations, such as omitting the attachment of the disk-shaped member 31c, can be adopted.
[0055]
(1-2) Configuration of coolant recovery disk:
Next, the configuration of the recovery disk 30 will be described in detail. FIG. 4 shows a top view (upper part in FIG. 2) and a front view (lower part in FIG. 2) of the collecting disk 30 as viewed from above in FIG. As shown in the top view of FIG. 4, the recovery disk 30 has a circular outer periphery and is provided with a circular hole 30a1 and a circular concave portion 30a2 at the center. The diameter of the hole 30a1 is smaller than the diameter of the recess 30a2, is substantially the same as the outer diameter of the lower end of the supply path 23a of the rotary shaft 23, and penetrates the recovery disk 30. Therefore, the supply path 23a can be inserted into the hole 30a1.
[0056]
The diameter of the concave portion 30a2 is larger than the outer diameter of the rotary shaft 23, and between the inner periphery of the concave portion 30a2 and the outer periphery of the hole 30a1 is thinner than the thickness of the collecting disk 30. On the other hand, a recess is formed. Eight recovery paths 30b are formed around the recess 30a2. The recovery path 30b is communicated from the recess 30a2 to the outer periphery of the recovery disk 30. That is, the collection path 30b is open at the outer periphery of the collection disk 30. The depth of the recovery path 30b is smaller than the thickness of the recovery disk 30 and is equal to the depth of the recess 30a2.
[0057]
The recovery path 30b is formed radially from the recess 30a2 toward the outer periphery, and the wall surface is gently bent. Therefore, the tangent to the wall of the recovery path 30b and the tangent to the outer circumference of the recovery disk 30 form an acute angle β at the opening formed by the recovery path 30b at the outer circumference of the recovery disk 30. A bolt hole is provided at a position equidistant from the center, and is fixed to the flange-like member 23c via the bolt hole. When fixed to the flange-like member 23c, the top view shown in FIG. 4 is oriented upward, and the diameter of the recovery disc 30 is the same as the diameter of the recovery disc 30 with respect to the top face as shown in FIG. Is attached.
[0058]
With the above configuration, the collection path 23b, the recess 30a2, and the collection path 30b communicate with each other to form a series of collection paths that open around the outer circumference of the collection disk 30, and the collection path 30b is It is a flow path through which the coolant flows in a direction substantially parallel to the upper surface of the cooling medium. Also in the recovery disk 30, it is assumed that the disk-shaped member 30 c is attached to the recovery disk 30 in consideration of easy processing, and the depth of the concave portion 30 a 2 and the recovery path 30 b is less than the thickness of the recovery disk 30. I have to. Of course, as the recovery path 30b, it is sufficient that a coolant flow path can be formed so that the coolant in the rotary tank 21 is recovered and supplied to the recovery path 23b. By opening it, the recovery path 30b is formed, and other configurations such as omitting the attachment of the disk-shaped member 30c can be adopted.
[0059]
As described above, both the recovery path 30b of the recovery disk 30 and the supply path 31b of the supply disk 31 have their wall surfaces bent toward the outer peripheral direction, but the recovery disk 30 and the supply disk 31 are When mounted on 23, the bending directions are oriented in opposite directions. That is, both the recovery path 30b and the supply path 31b have wall surfaces bent clockwise in FIGS. 3 and 4, but FIG. 3 shows a bottom view of the supply disk 31 and FIG. The top view of the recovery disk 30 is shown. Therefore, when the recovery disk 30 and the supply disk 31 are attached to the rotating shaft 23 as shown in FIG. 2, the bending direction of the supply path 31b and the bending direction of the recovery path 30b are opposite to each other.
[0060]
As described above, when the bending direction of the supply path 31b and the bending direction of the recovery path 30b are made opposite to each other, the opening directions of the respective openings also become opposite. The direction of the opening direction is such that when the coolant contaminant separation device is operating, the rotation direction of the coolant is constant, and at this time, the flow when supplying the coolant and the flow when collecting the coolant are different. It is based on the fact that it is preferable that they are opposite to each other.
[0061]
The separator 32 is mounted so as to be sandwiched between the collecting disk 30 and the supplying disk 31. The outer diameter of the separator 32 is larger than the outer diameter of the supplying disk 31 and the collecting disk 30. Is larger than the inner diameter of the opening 21c of the rotary tank 21 and the outer diameter of the supply disk 31. The outer diameter of the supply disk 31 is the inner diameter of the opening 21c of the rotary tank 21 and the collection circle. It is smaller than the outer diameter of the plate 30. This is for supplying and recovering the coolant without disturbing the liquid level. Hereinafter, the operation of the coolant contaminant separation device and the opening directions of the supply path 31b and the recovery path 30b, the recovery disk 30, and the supply circle will be described. The diameters of the plate 31, the separator 32, and the opening 21c will be described.
[0062]
(2) Operation of the coolant contaminant separation device:
When separating the coolant and the contaminant by the coolant contaminant separation device 10, first, the motor 12 is driven to transmit the rotational driving force to the gear 22d. When the rotation driving force is transmitted to the gear 22d, the cooling unit 22 and the rotating tub 21 rotate around the rotation shaft 23 as the rotation of the gear 22d. At this time, the motor 12 is driven so as to rotate the rotating tub 21 stably at a predetermined rotation speed. In the present embodiment, the rotating tub 21 rotates clockwise when viewed from below. When the rotation speed of the rotary tub 21 is stabilized, the above-mentioned pump (not shown) is driven to supply the coolant containing the contaminant to the supply path 23a as shown in FIG.
[0063]
The supplied coolant reaches the hole 31a of the supply disk 31 while filling the supply path 23a, and the coolant reaching the hole 31a is discharged from the opening on the outer periphery of the supply disk 31 through the supply path 31b. The discharged coolant flies in the rotating tub 21, but the coolant reaches the inner wall 21 a or the inclined surface 21 b in a state where the coolant is not accumulated in the rotating tub 21 at an initial stage. Since the rotating tank 21 is rotating, a centrifugal force acts on the coolant that has reached the inner wall 21a or the slope 21b, and the coolant moves to the inner wall 21a side of the rotating tank 21.
[0064]
If the above-described pump (not shown) is continuously driven to continuously supply the coolant containing the contaminant to the supply path 23a, the coolant is formed in a circular surface formed when the inner wall of the opening 21c is extended vertically upward. And a steady state is established. As described above, when the rotating tank 21 is continuously rotated while the coolant containing the contaminant is maintained in the rotating tank 21, a substance having a high density accumulates outside the rotating shaft 23, that is, along the inner wall 21a and the slope 21b. I do. Therefore, the coolant and the contaminant are separated, and the contaminant C in the coolant accumulates along the inner wall 21a and the slope 21b as shown in FIG.
[0065]
In the steady state described above, the circular diameter formed by the liquid surface of the coolant does not become smaller than the inner diameter of the opening 21c. Further, since the outer diameter of the supply disk 31 is smaller than the inner diameter of the opening 21c as described above, the outer circumference of the supply disk 31 does not contact the coolant level. Therefore, when the supply disk 31 supplies the coolant into the rotary tank 21, the outer peripheral portion of the supply disk 31 does not disturb the coolant level. Further, as described above, the tangent to the wall of the supply passage 31b and the tangent to the outer periphery of the supply disk 31 form an acute angle α, and in the present embodiment, when the rotary tub 21 is viewed from below, it is clockwise. Since the rotary tank is rotated so as to satisfy the above condition, it is possible to minimize the disturbance of the coolant level due to the coolant discharged from the opening of the supply path 31b.
[0066]
That is, as shown in FIG. 3, the supply passage 31b is opened so as to face the direction of rotation of the coolant level rotated by the rotation of the rotary tank 21, and indicates the speed and direction of the coolant discharged from the opening. When a vector and a vector indicating the rotation direction and the rotation speed of the coolant level are assumed, the difference vector between the two vectors is made as small as possible. Therefore, the relative speed between the coolant supplied from the supply passage 31b and the rotating coolant is small, and the disturbance of the liquid level when both coolants come into contact is suppressed.
[0067]
When the coolant level is disturbed and turbulence occurs in the liquid, the force for urging the contaminant toward the inner wall 21a does not work properly, and the contaminant that has been accumulated along the inner wall 21a once does not act. May be mixed into the liquid level again. However, in this embodiment, when supplying the coolant, the outer diameter of the supply disk 31 and the direction of the supply path 31b are devised to suppress the disturbance of the coolant level. Therefore, the coolant and the contaminants can be efficiently separated.
[0068]
On the other hand, as described above, when the liquid level of the coolant forms a circular surface centered on the rotation axis by the rotation of the rotary tank 21 and reaches a steady state, the above-described pump (not shown) is driven to clear the liquid from the recovery path 23b. Collect the coolant. That is, since the outer diameter of the recovery disk 30 is larger than the inner diameter of the opening 21c, the outer peripheral portion of the recovery disk 30 is located inside the coolant level in a steady state, and is recovered by driving a pump (not shown). The coolant can be collected via the path 30b. The outer diameter of the recovery disk 30 is larger than the inner diameter of the opening 21c, but the outer circumference is located near the coolant level.
[0069]
Since the contaminants are drawn toward the inner wall 21a during the rotation of the coolant, the concentration of the contaminants in the coolant close to the liquid surface is very small and the coolant is clear. Therefore, clear coolant can be collected by driving the above-mentioned pump (not shown). In this embodiment, the output of the pump (not shown) is adjusted so that the coolant supplied per unit time via the supply passage 23a and the coolant collected per unit time via the collection passage 23b are substantially equal to each other. The amount is the same. As a result, the coolant can be separated from the contaminants while maintaining the coolant liquid level in a circular shape as described above, and the coolant can be prevented from dropping from the opening 21c while collecting the clear coolant. .
[0070]
Further, since the outer peripheral portion of the recovery disk 30 is circular, only a part of the outer peripheral portion is not located in the coolant liquid level, but the outer peripheral portion is located in the coolant liquid surface over the entire circumference. are doing. When the opening of the cylindrical member is arranged in the coolant level, for example, so that only a part of the recovery path exists in the liquid level, the rotating coolant level and the flow of the coolant are reduced. There will be members arranged substantially vertically. If the member is arranged perpendicular to the flow of the coolant and the liquid level thereof, the coolant continuously collides with the member as the coolant rotates, and the liquid level is disturbed. However, in the present embodiment, since the outer peripheral portion of the recovery disk 30 is located in the liquid surface over the entire circumference, the portion perpendicular to the coolant flow at the contact portion between the recovery disk 30 and the coolant liquid is not exist. Therefore, disturbance of the coolant liquid can be suppressed.
[0071]
Furthermore, as described above, the tangent to the wall surface of the recovery path 30b and the tangent to the outer peripheral portion of the recovery disk 30 form an acute angle β, and in the present embodiment, when the rotating tank 21 is viewed from above, the counterclockwise Since the rotary tank 21 is rotated so as to rotate, the coolant can be collected very efficiently from the opening of the collection path 30b. That is, as shown in FIG. 4, the recovery path 30b is opened so as to face in the direction opposite to the rotation direction of the coolant level rotated by the rotation of the rotary tank 21, and the speed and direction of the coolant flowing into the opening are controlled. Assuming a vector indicating the rotation direction and the rotation speed of the coolant level, a difference vector between the two vectors is made as small as possible.
[0072]
Accordingly, the relative speed between the coolant flowing into the recovery path 30b and the rotating coolant is small, and the rotating coolant smoothly flows into the recovery path 30b. Therefore, the coolant can be collected very efficiently, and the occurrence of turbulence in the coolant liquid can be prevented. As described above, in the present embodiment, when collecting the coolant, the size of the outer diameter of the collection disk 30 and the direction of the collection path 30b are devised to suppress the disturbance of the coolant level. Therefore, the coolant and the contaminants can be efficiently separated.
[0073]
Further, in the present embodiment, a mechanism is adopted in which the concentration of the contaminants in the coolant collected by the collecting disk 30 is made as small as possible. That is, although the clear coolant is recovered in the recovery disk 30, the coolant is recovered from the supply disk 31 because the distance between the outer circumference of the recovery disk 30 and the outer circumference of the supply disk 31 is short in the present embodiment. The separator 32 is provided so that the coolant having a high concentration of contaminants is not recovered immediately after being supplied to the liquid surface.
[0074]
Since the separator 32 has a thin disk shape and an outer diameter larger than the outer diameter of the recovery disk 30, the outer circumference of the recovery disk 30 and the outer circumference of the supply disk 31 depend on the presence of the separator 32. Is isolated. Therefore, the coolant immediately after being supplied from the supply disk 31 is not recovered by the recovery disk 30, and the centrifugal force sufficiently acts on the coolant immediately after the supply, and the coolant near the outer peripheral portion of the recovery disk 30. The existing coolant is in a state where the contaminants are sufficiently separated, so that clear coolant can be efficiently recovered.
[0075]
As described above, in the present embodiment, although the contaminants are efficiently separated / recovered by various configurations to promote the reuse of the coolant, the coolant that is easy to reuse is prevented by preventing the heat accumulation of the coolant. There is also a configuration to acquire. That is, since the cooling unit 22 forms a laminar fan as described above, when the cooling unit 22 rotates with the rotation of the motor 12, the cooling unit 22 moves from the opening above the air flow path 22b toward the opening 22b1. Air flows.
[0076]
Therefore, while the rotating tub 21 is rotating, the heat generated in the ball bearing 24 is released from the cooling fins 22a. As a result, heat generated due to the rotation of the rotary tub 21 is less likely to be transmitted to the coolant passing through the supply path 23a, the recovery path 23b, and the like, thereby preventing the recovered coolant from being heated. Since the coolant is used as cooling water, it is possible to immediately use the coolant immediately after collection by keeping the temperature of the coolant low.
[0077]
Further, in the present embodiment, in addition to the configuration for promoting the reuse of the coolant, a configuration for facilitating the maintenance of the coolant contaminant separation device 10 is employed. That is, the inner wall 21a and the slope 21b are coated with a fluorocarbon resin 21d to prevent the contaminants separated from the coolant from adhering to the inner wall 21a and the slope 21b.
[0078]
For this reason, if the motor 12 is stopped to stop the rotation of the rotary tub 21 after the coolant contaminant separation device 10 is driven to some extent, the coolant accumulated on the inner wall 21a and the slope 21b due to the coolant that continues to rotate for a while due to inertia. The material is rolled up and mixed into the coolant again. When the rotational speed of the coolant decreases, the centrifugal force gradually decreases, so that the coolant gradually falls from the opening 21c. Since the contaminants hardly adhere to the inner wall 21a and the slope 21b due to the coating 21d, the contaminants fall from the opening 21c while being mixed in the coolant. Therefore, even if the coolant contaminant separation device 10 is operated, once the rotation of the rotary tub 21 is stopped, the inner wall 21a and the slope 21b can be cleaned, and almost no manual maintenance is required.
[0079]
(3) Other embodiments:
In the present invention, it is sufficient that the coolant can be efficiently recovered and the coolant can be recovered in a state where it can be easily reused, and various configurations other than the above embodiment can be adopted. FIG. 6 is a sectional view of a main part of a coolant contaminant separation apparatus according to the second embodiment. In the second embodiment, a configuration in which the recovery disk and the supply disk are separated from each other is adopted, and other configurations are common to the first embodiment.
[0080]
In the second embodiment, as shown in FIG. 6, the configuration and the mounting position of the recovery disk 300 are the same as in the first embodiment. Although the configuration of the supply disk 310 is the same as that of the first embodiment, the recovery disk 300 and the supply disk 310 are separated by a predetermined distance by being attached to the separation member 321. That is, the separating member 321 is a substantially cylindrical member having a flange-shaped portion at the upper end and a lower end, and the recovery disk 300 is fixed to the upper end and the supply disk 310 is bolted to the lower end by the flange-shaped portion. Are separated from each other by a distance corresponding to the height of the separation member 321.
[0081]
Further, an insertion hole 321a is formed in the center of the separating member 321. In this embodiment, the center of the rotating shaft 230 is longer than the rotating shaft 23 of the first embodiment. The supply path 230a can reach the supply disk 310 by being inserted through the supply path 321a. Therefore, similarly to the first embodiment, the supply path 230a communicates with the hole 310a of the supply disk 310 and the supply path 310b, and forms a series of supply paths that open at the outer periphery of the supply disk 310.
[0082]
Therefore, in the supply disk 310, the coolant containing the contaminant can be supplied to the rotary tank at a position away from the opening on the outer peripheral portion of the recovery disk 300, and the contaminant is sufficiently removed by the rotation of the rotary tank. After separating the coolant, only the clear coolant can be reliably recovered by the recovery disk 300. In the second embodiment shown in FIG. 6, the separator 320 may be interposed between the recovery disk 300 and the supply disk 310.
[0083]
That is, as shown in FIG. 6, a thin plate-like separator 320 having an outer diameter larger than the outer diameter of the recovery disk 300 can be attached to the center of the separating member 321 in the height direction. According to this configuration, it is possible to prevent the coolant from flowing from the vicinity of the outer peripheral portion of the supply disk 310 toward the recovery disk 300, and it is possible to more reliably recover the clear coolant in the recovery disk 300.
[0084]
Further, if the coolant contains various bacteria, it becomes difficult to reuse the product due to the generation of offensive odor. Therefore, it is possible to add a configuration for promoting the reuse by suppressing the propagation of various bacteria. FIG. 7 is a cross-sectional view of a main part of a coolant contaminant separation apparatus according to a third embodiment that employs a configuration that suppresses the propagation of various bacteria. In the third embodiment, a configuration in which a sterilization mechanism 330 is added to the same configuration as the first embodiment is adopted.
[0085]
That is, in the first embodiment, the recovery disk 30, the separator 32, and the supply disk 31 are integrally fixed by bolts, and the coolant forms a circular liquid surface by the rotation of the rotary tub 21. A large space is formed below the supply disk 31. Therefore, a sterilization mechanism 330 is provided in this space.
[0086]
The sterilization mechanism 330 is a mechanism for reducing various germs in the coolant that rotates inside the rotation tank 21 by the rotation of the rotation tank 21, and can employ various configurations. For example, as shown in an enlarged view A of FIG. 7, a configuration in which a light emitting unit 331 that irradiates light toward the inner wall 21 a of the rotating tub 21 can be employed as the sterilization mechanism 330. At this time, the inner wall 21a and the slope 21b are coated with a photocatalyst 331a such as titanium oxide. As a result, the photocatalyst 331a exhibits a bactericidal action by the irradiation light of the light emitting unit 331, and reduces various bacteria in the coolant during centrifugation.
[0087]
Further, as shown in the enlarged view B, an ozone generator may be employed as the sterilization mechanism 330. That is, the discharge unit 332 includes an electrode (not shown), and generates ozone from oxygen in the air by discharging at the electrode. Since ozone has a bactericidal action, it is possible to reduce germs in the coolant by generating ozone during centrifugal separation of the coolant. Needless to say, various configurations having a bactericidal action other than ozone can be adopted, and a device for irradiating ultraviolet rays may be configured to irradiate ultraviolet rays having a bactericidal action.
[0088]
As described above, in the present invention, various configurations promote the reuse of the coolant and efficiently collect the coolant. Further, the separation of the coolant can be performed only by rotating the rotary tank and driving the pump, so that it can be configured without maintenance. Therefore, it is possible to provide a coolant contaminant separation device that can be operated easily at low cost and can efficiently separate contaminants.
[Brief description of the drawings]
FIG. 1 is a partially broken perspective view showing a coolant contaminant separation device.
FIG. 2 is a sectional view of a main part of a coolant contaminant separation device.
FIG. 3 is a bottom view and a front view of a supply disk.
FIG. 4 is a top view and a front view of a recovery disk.
FIG. 5 is a diagram showing an operation state of the coolant contaminant separation device.
FIG. 6 is a cross-sectional view of a main part of a coolant contaminant separation device according to a second embodiment.
FIG. 7 is a cross-sectional view of a main part of a coolant contaminant separation device according to a third embodiment.
[Explanation of symbols]
10 ... Coolant mixture separation device
11 ... plate-like member
12 ... Motor
20: fixed part
21 ... Rotary tank
21a ... inner wall
21b ... Slope
21c ... opening
21d ... Coating
22 ... Cooling unit
22a ... cooling fin
22b ... air flow path
22b1 ... opening
22d ... gear
23 ... Rotary axis
23a ... supply path
23b ... collection path
23b, 23c ... flange-like members
23c: Flange-like member
24 ... Ball bearing
30 ... Recovery disk
30a1 ... hole
30a2 ... recess
30b ... collection path
30c: disk-shaped member
31 ... Supply disk
31a ... hole
31b ... supply path
31c: disk-shaped member
32 ... Separator

Claims (16)

A coolant contaminant separation device that supplies a coolant containing contaminants to a rotating tank having an inner wall that is substantially axisymmetric with respect to a predetermined rotation axis to separate contaminants and coolant by centrifugal force,
A disk-like shape that is oriented substantially perpendicularly to the rotation axis of the rotation tank inside the rotation tank and that is opened at the outer periphery thereof and has a supply path for supplying the coolant containing the contaminants substantially radially. A coolant contaminant separation device comprising a coolant supply unit. In a steady state in which a centrifugal force is applied to the coolant in the direction of the inner wall of the rotary tank by rotating the rotary tank to make the coolant level substantially circular, the outer periphery of the disk is near the coolant level. 2. The coolant contaminant separation apparatus according to claim 1, wherein the apparatus is disposed on the rotation shaft side from the coolant level. The supply path has an opening direction at an acute angle with respect to a tangent line of an outer peripheral portion, and is opened so that coolant is supplied while having a rotation component in the same direction as the rotation direction of the rotary tank. The coolant contaminant separation device according to claim 1 or 2, wherein A coolant contaminant separation device that supplies a coolant containing contaminants to a rotating tank having an inner wall that is substantially axisymmetric with respect to a predetermined rotation axis to separate contaminants and coolant by centrifugal force,
A disk-shaped recovery which is oriented substantially perpendicular to the rotation axis of the rotation tub inside the rotation tub and has an opening at the outer periphery thereof and in which a recovery path serving as a recovery path for the coolant containing the contaminant is formed. In the steady state in which a centrifugal force is applied to the coolant in the direction of the inner wall of the rotating tank by rotating the rotating tank to make the coolant liquid level substantially circular, the outer peripheral portion has the coolant liquid level. A coolant contaminant separation device, comprising: a coolant collection unit in which the collection member is disposed so as to be located inside. An opening direction of the recovery path is an acute angle with respect to a tangent line of an outer peripheral portion, and an opening is provided so that the coolant is recovered while having a rotation component in the same direction as the rotation direction of the rotary tank. The coolant contaminant separation apparatus according to claim 4, wherein A coolant contaminant separation device that supplies a coolant containing contaminants to a rotating tank having an inner wall that is substantially axisymmetric with respect to a predetermined rotation axis to separate contaminants and coolant by centrifugal force,
A disk-shaped coolant that is oriented substantially perpendicular to the rotation axis of the rotation tank inside the rotation tank, and has an opening at an outer peripheral portion thereof and a supply path serving as a supply path for the coolant containing the contaminant formed therein. Supply means;
A disk-shaped recovery which is oriented substantially perpendicular to the rotation axis of the rotation tub inside the rotation tub and has an opening at the outer periphery thereof and in which a recovery path serving as a recovery path for the coolant containing the contaminant is formed. In the steady state in which a centrifugal force is applied to the coolant in the direction of the inner wall of the rotating tank by rotating the rotating tank to make the coolant liquid level substantially circular, the outer peripheral portion has the coolant liquid level. Coolant recovery means in which the recovery member is disposed so as to be located inside,
A disk-shaped member disposed between the coolant supply unit and the coolant recovery unit, wherein in the steady state, the outer peripheral portion of the disk-shaped member is closer to the inner wall of the rotary tank than the outer peripheral portion of the recovery member. And a separator disposed so as to form a coolant mixture separator. A coolant contaminant separation device that supplies a coolant containing contaminants to a rotating tank having an inner wall that is substantially axisymmetric with respect to a predetermined rotation axis to separate contaminants and coolant by centrifugal force,
A coolant contaminant separation apparatus, wherein the rotary tank is fixed to a rotating shaft vertically above the rotary tank, and an opening below the rotary tank is formed with a diameter smaller than a diameter of the inner wall. The coolant contaminant separation apparatus according to claim 7, wherein an adhesion preventing coating for preventing the contaminants from adhering is applied to an inner wall of the rotary tank. A coolant contaminant separation device that supplies a coolant containing contaminants to a rotating tank having an inner wall that is substantially axisymmetric with respect to a predetermined rotation axis to separate contaminants and coolant by centrifugal force,
The above-mentioned rotary tub is fixed to a rotary shaft vertically above the rotary tub, and is provided with cooling fins on the outer peripheral side of the rotary shaft, in which a flow path of a cooling medium is formed. apparatus. A coolant contaminant separation device that supplies a coolant containing contaminants to a rotating tank having an inner wall that is substantially axisymmetric with respect to a predetermined rotation axis to separate contaminants and coolant by centrifugal force,
A space near the center of the rotary tank surrounded by the coolant liquid in a steady state in which the coolant liquid surface is made substantially circular by applying a centrifugal force to the coolant toward the inner wall direction of the rotary tank by rotating the rotary tank. A sterilizing means for reducing bacteria in the coolant is provided. A coolant contaminant separation method for separating contaminants and coolant by centrifugal force by supplying a coolant containing contaminants to a rotating tank having an inner wall that is substantially axisymmetric with respect to a predetermined rotation axis,
A method of separating a coolant mixture, comprising supplying a coolant containing the mixture substantially radially inside the rotary tank with respect to a rotation axis of the rotary tank when separating the mixture from the coolant. A coolant contaminant separation method for separating contaminants and coolant by centrifugal force by supplying a coolant containing contaminants to a rotating tank having an inner wall that is substantially axisymmetric with respect to a predetermined rotation axis,
By rotating the rotary tub, a centrifugal force is applied to the coolant toward the inner wall of the rotary tub to make the coolant liquid level substantially circular. A method for separating coolant contaminants, comprising: collecting a coolant through a recovery port while arranging a recovery port in the inside. A coolant contaminant separation method for separating contaminants and coolant by centrifugal force by supplying a coolant containing contaminants to a rotating tank having an inner wall that is substantially axisymmetric with respect to a predetermined rotation axis,
At the time of separation of the contaminant and the coolant, a coolant containing the contaminant is supplied substantially radially to the rotation axis of the rotary tank inside the rotary tank,
By rotating the rotary tub, a centrifugal force is applied to the coolant toward the inner wall of the rotary tub to make the coolant liquid level substantially circular. The coolant is collected through this recovery port while arranging the recovery port inside the
A method for separating coolant contaminants, wherein a coolant immediately after the supply is prevented from being directly collected from the recovery port by a separator interposed between the coolant supply portion and the coolant recovery port. A coolant contaminant separation method for separating contaminants and coolant by centrifugal force by supplying a coolant containing contaminants to a rotating tank having an inner wall that is substantially axisymmetric with respect to a predetermined rotation axis,
The contaminant and the coolant are separated by rotating the rotary tank vertically above the rotary shaft and rotating the rotary tank. The vertical lower part of the rotary tank is opened with a diameter smaller than the diameter of the inner wall, and the rotary tank is rotated. A coolant containing contaminants is discharged from the opening by stopping the rotation after the above-mentioned separation is performed. A coolant contaminant separation method for separating contaminants and coolant by centrifugal force by supplying a coolant containing contaminants to a rotating tank having an inner wall that is substantially axisymmetric with respect to a predetermined rotation axis,
The rotating tank is fixed to the rotating shaft vertically above the rotating tank, and when the rotating tank is rotated about the rotating shaft to separate the contaminant and the coolant, the rotating tank rotates together with the rotating tank on the outer peripheral side of the rotating shaft. A method for separating coolant contaminants, wherein heat exchange is performed between the inside and the outside of a part to be cooled. A coolant contaminant separation method for separating contaminants and coolant by centrifugal force by supplying a coolant containing contaminants to a rotating tank having an inner wall that is substantially axisymmetric with respect to a predetermined rotation axis,
By rotating the rotary tub, a centrifugal force is applied to the coolant toward the inner wall of the rotary tub so that the coolant liquid surface is substantially circular, and a space is formed inside the circular portion near the center of the rotary tub. A sterilizing section for reducing bacteria in the coolant in the space, and sterilizing the coolant by the sterilizing section when separating the coolant from the contaminant;

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