JP2004034017A - Centrifugal separator provided with liquid separation function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a centrifugal separator which simultaneously carries out the treatment of chips or sludge in a water-soluble coolant discharged from a grinding machine or the like and the extraction of a water-insoluble oil. <P>SOLUTION: The separator which removes the sludge and extracts the oil by centrifugal separation by rotating a rotating cylinder 15 around a longitudinal rotation axis 24 has blades 14 firmly fixed to two or more parts radially from a rotation axis 27 and at even intervals in the inner circumference 33 of the rotating cylinder which is fixed to a rotation shaft 13, and has disks 38 firmly fixed to the lower ends of the blades with the center aligned with the rotation axis. The separator is provided with a discharge opening 41 for the water-soluble coolant on the undersurface of the rotating cylinder, and is provided with a base body 23 equipped with a means for supporting the rotating cylinder, a means for rotating the rotating cylinder, a liquid-take-in means installed with a flow regulating plate 44, recovery means for respectively recovering the oil discharged from the upper part of the rotating cylinder or the water-soluble coolant discharged from the discharge opening, and discharge means for respectively discharging the water-soluble coolant and the oil from the separator. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
[Industrial applications]
According to the present invention, when a mixture is contained in a liquid composed of two kinds of liquids having different specific gravities, the separation of the two kinds of liquids having different specific gravities is performed simultaneously with the treatment of the mixture in the liquid. Can do it.
For example, the treatment of sludge such as chips and abrasive grains contained in a water-soluble coolant mainly discharged from an industrial machine such as a grinder (hereinafter also referred to as a processing mother machine), and the same as in a water-soluble coolant. The present invention relates to a centrifugal separator having a liquid separating function, which can simultaneously extract water-insoluble oil (hereinafter, also simply referred to as an oil) contained in water.
[0002]
[Prior art]
The industry has a liquid separation function that can simultaneously process chips or sludge such as abrasive grains discharged from the processing mother machine and extract oil from a water-soluble coolant containing oil. There is a need for a centrifuge.
[0003]
However, conventionally, only the sludge in the oil-containing water-soluble coolant is processed by the centrifuge, and the extraction of the oil from the oil-containing water-soluble coolant discharged from the centrifuge is performed by the centrifuge. In most cases, it is performed by an oil-water separator, etc. prepared separately.
There has been no device that can treat sludge in a water-soluble coolant and separate oil from a water-soluble coolant only by a centrifugal separator that is integrally formed.
[0004]
FIG. 3 shows an example of a centrifuge 48 conventionally used.
[0005]
An electric motor 17 for rotationally driving the rotary cylinder 15 fixed to the rotary shaft 13 is mounted on the base body 23 with its rotary shaft center 24 in a vertical direction, and a shaft 25 of the motor 17 has a belt pulley 26 Is inserted.
[0006]
The rotating cylinder 15 fixed to the rotating shaft 13 is also provided with a rotating shaft 27 in a vertical direction, and a bearing case 29 having two bearings 28 for rotatably holding the rotating shaft 13. By being inserted inside, it is mounted on the base 23.
[0007]
A belt pulley 31 is inserted into one end of the rotating shaft 13, and the belt pulley 31 is connected to the belt pulley 26 inserted into the shaft 25 of the electric motor 17 via the belt 18. The rotating cylinder 15 fixed to the rotating shaft 13 rotates in conjunction with the rotation of the belt pulley 26 and the belt pulley 31 by the activation of the electric motor 17.
[0008]
Chips, abrasive grains and the like discharged from the processing mother machine and flown into the rotating cylinder 15 fixed to the rotating shaft 13 rotated by the activation of the electric motor 17 from the intake port 12 provided above the base 23. The water-soluble coolant containing sludge or oil is fixed to the rotating rotating shaft 13 and rotates together with the rotating cylinder 15 having the donut-shaped lid 32 on the upper part thereof. Sludge, such as chips and abrasive grains, contained in the coolant is accumulated and adhered to the inner peripheral surface 33 of the cylindrical portion of the rotary cylinder 15.
[0009]
By centrifugation, most of the chips in the water-soluble coolant, sludge such as abrasive grains are removed, and the water-soluble coolant mainly containing only oil is supplied to the rotating cylinder 15 fixed to the rotating rotating shaft 13. The donut-shaped lid 32 provided on the upper portion and rotating simultaneously with the rotating cylinder 15 is discharged to the outside of the rotating cylinder 15 through an inner hole 47 of the donut-shaped lid 32.
[0010]
The water-soluble coolant mainly containing only oil discharged to the outside of the rotary cylinder 15 is recovered in the coolant recovery chamber 49 of the base 23 and discharged from the coolant discharge port 50 to the outside of the centrifuge 48. .
[0011]
Extraction of oil from the water-soluble coolant mainly containing only oil discharged from the coolant outlet 50 to the outside of the centrifuge 48 is performed by using an oil-water separator provided separately from the centrifuge 48 (see FIG. None).
[0012]
[Problems to be solved by the invention]
Claim 1 according to the present invention is different from the above-described method, in which processing of chips in water-soluble coolant discharged from the processing mother machine or sludge such as abrasive grains, and oil contained in the water-soluble coolant are performed. An object of the present invention is to provide a centrifugal separator having a novel liquid separation function capable of simultaneously performing extraction.
[0013]
[Means for Solving the Problems]
The centrifugal separator having a liquid separation function according to claim 1,
By rotating the rotating shaft around the vertical axis by the electric motor and simultaneously rotating the rotating cylinder fixed to the rotating shaft,
As a device that removes sludge by centrifugation and also extracts oil from the water-soluble coolant containing sludge and oil taken into the rotating cylinder,
Except for the sludge at the center of the rotating shaft and the center of the rotating cylinder including the water-soluble coolant intake port containing oil, the inner surface of the cylindrical portion of the rotating cylinder fixed to the rotating shaft has a vertical length of the rotating cylinder. At least two blades provided radially from the center of rotation in the direction toward the inner peripheral surface of the cylindrical portion of the rotary cylinder and equidistantly fixed in the axial direction of the inner peripheral surface of the cylindrical portion of the rotary cylinder. ,
At the lower end of at least two blades fixed in the axial direction on the inner peripheral surface of the cylindrical portion of the rotary cylinder, a disk centered on the rotation axis of the rotary cylinder is fixed, and the disk is fixed. A rotating cylinder having a discharge hole for discharging a water-soluble coolant having a large specific gravity from the rotating cylinder on the lower surface of the rotating cylinder,
Rotating cylinder support means for rotatably supporting the rotating cylinder,
Rotating cylinder rotating means for rotating the rotating cylinder,
A flow straightening means for gently taking in the water-soluble coolant containing sludge and oil into the rotary cylinder at an inlet into the rotary cylinder for taking in the water-soluble coolant containing sludge and oil into the rotary cylinder. Liquid intake means comprising:
With the above-mentioned device or equipment attached, the oil having a small specific gravity discharged from the upper portion of the rotary cylinder due to the centrifugal force in the rotary cylinder, or the specific gravity discharged from the discharge hole provided on the lower surface of the rotary cylinder. It is characterized by comprising a base provided with a collecting means for collecting a large water-soluble coolant and a discharging means for discharging the water-soluble coolant and oil out of the machine.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
The centrifugal separator having a liquid separation function according to the present embodiment is mainly discharged from the grinding machine when performing grinding using a water-soluble coolant by the grinding machine, chips in the water-soluble coolant, Alternatively, it is an apparatus for simultaneously performing processing of sludge such as abrasive grains and extraction of oil from a water-soluble coolant containing oil such as lubricating oil, hydraulic oil, rust-preventive oil, and the like.
[0015]
Oils such as chips, sludge such as abrasives, lubricating oil, hydraulic oil, rust-preventive oil, etc. contained in the water-soluble coolant generated mainly by grinding with a grinder improve machining accuracy. In order to extend the life of the coolant, it is required to remove the coolant reliably.
[0016]
Hereinafter, typical embodiments of the present invention will be described with reference to the drawings.
However, the dimensions, shapes, materials, relative positions and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to them unless otherwise specified. , Are merely illustrative examples.
[0017]
As can be understood from FIGS. 1 and 2, the centrifugal separator 11 having a liquid separation function according to the present embodiment includes:
An intake port 12 for taking in a water-soluble coolant containing sludge such as chips, abrasive grains, oil, and the like discharged from the processing mother machine into a centrifugal separator 11, is fixed to a rotary shaft 13, and is fixed inside. A rotary cylinder 15 provided with four blades 14,
A rotation support portion 16 for rotatably supporting the rotating cylinder 15 fixed to the rotating shaft 13;
A motor 17 for rotating the rotary cylinder 15 fixed to the rotary shaft 13, and a belt 18 for transmitting the driving force of the motor 17 to the rotary cylinder 15 fixed to the rotary shaft 13;
The intake port 12, the rotary cylinder 15, the rotation support portion 16, the electric motor 17 and the like are mounted, an oil recovery chamber 19 for recovering oil, a water-soluble coolant recovery chamber 20 for recovering a water-soluble coolant, and An oil discharge port 21 for discharging oil from the oil recovery chamber 19 to the outside of the centrifuge 11, and a water-soluble coolant discharge port for discharging water-soluble coolant from the water-soluble coolant recovery chamber 20 to the outside of the centrifuge 11. It is composed of a base 23 provided with a substrate 22 and the like.
[0018]
An electric motor 17 for rotationally driving the rotary cylinder 15 fixed to the rotary shaft 13 is mounted on the base body 23 with its rotary shaft center 24 in a vertical direction, and a shaft 25 of the motor 17 has a belt pulley 26 Is inserted.
[0019]
The rotating cylinder 15 fixed to the rotating shaft 13 is also provided with a rotating shaft 27 in a vertical direction, and a bearing case 29 having two bearings 28 for rotatably holding the rotating shaft 13. By being inserted inside, it is mounted on the base 23.
In addition, a coolant intrusion prevention plate 30 for preventing water-soluble coolant from entering the bearing 28 in the bearing case 29 is provided at a lower portion of the rotary cylinder 15.
[0020]
A belt pulley 31 is inserted into one end of the rotating shaft 13, and the belt pulley 31 is connected to the belt pulley 26 inserted into the shaft 25 of the electric motor 17 via the belt 18. The rotating cylinder 15 fixed to the rotating shaft 13 rotates in conjunction with the rotation of the belt pulley 26 and the belt pulley 31 by the activation of the electric motor 17, and the number of rotations can be arbitrarily selected, for example, 1500 to 6000 rpm. Can be about.
[0021]
The rotating cylindrical body 15 having a donut-shaped lid 32 at the upper part thereof rotates, and the rotating cylindrical body 15 has a cylindrical inner peripheral surface 33 from the vertical rotation axis 31 of the rotating cylindrical body 13. Four blades 14 are fixed to the lower surface of the donut-shaped lid 32 at equal intervals radially toward the inner peripheral surface 33 of the cylindrical portion.
There are gaps 34 between the four blades 14 and the inner peripheral surface 33 of the cylindrical portion of the rotary cylinder 15.
[0022]
Each of the four blades 14 is provided with a similar notch 36 at an upper portion of a vertical ridge 35 on the rotation axis 27 side,
At the lower end ridge line portion 37 of each of the four blades 14, a disc 38 having a center on the rotation axis 27 of the rotary cylinder 15 is formed with an outer diameter and an inner peripheral surface 33 of the cylindrical portion of the rotary cylinder 15. The blades 14 are fixed so as to have an arbitrary gap 39 therebetween, and the four blades 14 are connected.
[0023]
The bottom surface 40 of the rotating cylinder 15 has at least two locations for discharging the water-soluble coolant from the inside of the rotating cylinder 15 on the circumference of a circle having an arbitrary diameter centered on the rotation axis 27. A circular discharge hole 41 is provided.
[0024]
When the water-soluble coolant containing sludge such as chips, abrasive grains, and oil discharged from the processing mother machine is taken into the centrifugal separator 11 from the intake port 12, the intake pipe 42 of the intake port 12 and The flow rate of the water-soluble coolant when the water-soluble coolant is introduced into the centrifugal separator 11 is suppressed to a gentle state by the flow straightening plate 44 fixed via the several legs 43, and the rotating rotary cylinder 15 is rotated. The fluid flows smoothly into the rotary cylinder 15 from a direction of about 90 degrees with respect to the vertical rotation axis 27.
[0025]
The water-soluble coolant containing chips, sludge such as abrasive grains, oil, etc., which has flowed smoothly into the rotary cylinder 15 rotates together with the rotating rotary cylinder 15 and generates centrifugal force generated by the rotational force. Due to the force, sludge such as chips and abrasive grains contained in the water-soluble coolant is accumulated on the inner peripheral surface 33 of the cylindrical portion of the rotary cylinder 15.
[0026]
As described above, the inside of the rotary cylinder 15 is partitioned by the four blades 14 except for the intake port 12 of the rotary shaft 27, and the inner circumference of the cylindrical portion of the four blades 14 and the rotary cylinder 15 is described. The water-soluble coolant can freely flow between the gaps 34 of the four rooms 46 partitioned by the four blades 14 by the arbitrary gaps 34 between the surface 33 and the above-described space. The sludge collected and adhered to the inner peripheral surface 33 of the cylindrical portion of the rotating cylinder 15 by centrifugal force becomes a uniform layer without unevenness.
[0027]
Due to the centrifugal force, sludge such as chips and abrasive grains contained in the water-soluble coolant containing oil and the like is accumulated on the inner peripheral surface 33 of the cylindrical portion of the rotating cylinder 15, and the inner peripheral surface 33 of the rotating cylinder 15 is rotated. At the same time
The water-soluble coolant containing oil or the like after sludge such as chips and abrasive grains has been removed is accumulated toward the inner peripheral surface 33 of the rotating cylinder 15 by the centrifugal force in the rotating rotating cylinder 15. The vertical portion of the rotation axis 27 of the rotary cylinder 15 also becomes a hollow portion 45 due to centrifugal force.
[0028]
The water-soluble coolant containing oil and the like accumulated toward the cylindrical portion inner peripheral surface 33 of the rotating rotary cylinder 15 is separated from the blade 14 by the above-described four blades 14 provided in the rotating rotary cylinder 15. It is divided into four equal parts in the rotating cylinder 15 that rotates simultaneously.
[0029]
The water-soluble coolant containing oil and the like divided into four equal parts by the four blades 14 provided in the rotating rotary cylinder 15 makes the four rotating rotary cylinders 15 divided into four equal parts. When the rotation is continued while maintaining the state of being accumulated in each of the rooms 46, the centrifugal force further acts on the water-soluble coolant containing oil or the like,
In the rotating rotary cylinder 15, without stirring the water-soluble coolant containing oil or the like,
The water-soluble coolant having a large specific gravity is applied to the inner peripheral surface 33 of the cylindrical portion of the rotating rotary cylinder 15.
The oil having a low specific gravity is accumulated on the rotating shaft 27 side of the rotating rotary cylinder 15 in the longitudinal direction, and most of the oil can be extracted from the oil-containing water-soluble coolant.
[0030]
The water-soluble coolant having a large specific gravity accumulated on the inner peripheral surface 33 of the cylindrical portion of the rotating rotary cylinder 15 is a rotary cylindrical body to which the above-described four blades 14 provided in the rotating rotary cylinder 15 are fixed. The four discharges provided on the bottom surface 40 of the rotating rotary cylinder 15 via the gap 39 between the disk 38 having the rotation axis 27 as the center and the cylindrical inner peripheral surface 33 of the rotary cylinder 15. The water is discharged from the hole 41 to the water-soluble coolant recovery chamber 20 in the base 23.
[0031]
On the other hand, the oil having a low specific gravity accumulated on the side of the rotating rotary cylinder 15 in the longitudinal direction of the rotating rotary cylinder 15 is provided to each of the blades 14 from the vertical rotating axis 27 of the rotating rotary cylindrical body 15. Through the inner hole 47 of the donut-shaped lid 32 having a radius equal to the distance from the notch 36 to the notch 36, from the upper part of the rotating rotary cylinder 15 to the oil recovery chamber 19 in the base 23. Is discharged.
[0032]
The water-soluble coolant or oil discharged to the water-soluble coolant recovery chamber 20 or the oil recovery chamber 19 in the base body 23 flows from the water-soluble coolant discharge port 22 and the oil discharge port 21 to the outside of the centrifuge 11, respectively. Is discharged.
[0033]
In addition, the device of the present invention is not limited to the embodiment described above and shown in the drawings, and can be appropriately changed without departing from the gist.
[0034]
【The invention's effect】
According to the centrifugal separator having a liquid separation function according to claim 1, when cleaning water-soluble coolant containing sludge or oil discharged from the processing mother machine, chips or abrasive grains, Alternatively, sludge such as abrasive grains, oil, and water-soluble coolant can be individually collected, so that post-processing thereof can be easily performed, and a space-saving water-soluble coolant cleaning device can be achieved. it can.
[0035]
In addition, these effects are expected to have the effect of preventing decay of the coolant and reducing the running cost.For coolants such as machining mother machines that are used repeatedly, maintaining the cleanliness and extending the life of the machining mother machine will improve the performance of the machining mother machine. And can contribute to a reduction in operating costs as a whole.
[Brief description of the drawings]
FIG. 1 is an explanatory front sectional view showing an example of a centrifuge having a liquid separating function according to the present invention.
FIG. 2 is an explanatory plan view showing an example of a centrifuge having a liquid separating function according to the present invention.
FIG. 3 is an explanatory front sectional view showing an example of a conventional centrifuge.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Centrifugal separator 12 ... Intake port 13 ... Rotary shaft 14 ... Blade 15 ... Rotating cylinder 16 ... Rotation support part 17 ... Electric motor 18 ... Belt 19 ..Oil recovery chamber 20 ... Water-soluble coolant recovery chamber 21 ... Oil outlet 22 ... Water-soluble coolant outlet 23 ... Substrate 24 ... Rotary axis 25 ... Axis 26 ...・ Belt pulley 27 ・ ・ ・ Rotating shaft center 28 ・ ・ ・ Bearing 29 ・ ・ ・ Bearing case 30 ・ ・ ・ Coolant intrusion prevention play 31 ・ ・ ・ Belt pulley 32 ・ ・ ・ Doughnut-shaped lid 33 ・ ・ ・ In the cylindrical part Circumferential surface 34 ... Gap 35 ... Ridge 36 ... Notch 37 ... Lower ridge 38 ... Disc 39 ... Gap 40 ... Bottom 41 ... discharge hole 42 ... intake pipe 43 ... leg 44 ... straightening plate 45 ... hollow part 46 ... room 47 ... inner hole 48 ... centrifuge 49 ...・ Coolant recovery chamber 50 ・ ・ ・ Coolant outlet

Claims (1)

By rotating the rotating shaft around the longitudinal axis by the electric motor and simultaneously rotating the rotating cylinder fixed to the rotating shaft,
An apparatus that removes the mixture by centrifugation from the liquid composed of two kinds of liquids containing the mixture and having different densities, which is taken into the rotating cylinder, and separates the two kinds of liquids having different specific gravities. As
Except for the center of the rotary cylinder including the liquid intake port at the center of the rotary shaft, the rotation center of the rotary cylinder in the vertical direction is provided on the inner peripheral surface of the cylindrical portion of the rotary cylinder fixed to the rotary shaft. From radially toward the inner peripheral surface of the cylindrical portion of the rotary cylinder, and at least two blades provided at equal intervals are fixed in the axial direction of the inner peripheral surface of the cylindrical portion,
At the lower end of the blade fixed in the axial direction of the inner peripheral surface of the cylindrical portion, a disk centered on the rotation axis of the rotary cylinder is fixed, and the disk is connected by being fixed. A blade, and a rotary cylinder having a discharge hole for discharging a liquid having a large specific gravity from the rotary cylinder on the lower surface of the rotary cylinder;
The rotating cylinder support means for rotatably supporting the rotating cylinder,
The rotating cylinder rotating means for rotating the rotating cylinder,
The liquid containing the mixture and composed of two types of liquids having different specific gravities is gently taken into the rotary cylinder into an intake port into the rotary cylinder for taking the liquid into the rotary cylinder. Means for taking in the liquid comprising a rectifying means for;
Attached to the above-mentioned device or apparatus, a liquid having a small specific gravity of the liquid discharged from the upper portion of the rotating cylinder due to centrifugal force in the rotating rotating cylinder, or provided on the lower surface of the rotating cylinder. A collecting means for collecting a liquid having a large specific gravity among the liquids discharged from the formed discharge holes, and a base provided with a discharging means for discharging each liquid out of the machine. A centrifuge having a liquid separation function.

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