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JP2005192113

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DESCRIPTION JP2005192113
PROBLEM TO BE SOLVED: To provide an ultrasonic emitter which can emit strong ultrasonic
waves in a wide range of surroundings and which makes it easy to make the distribution of
ultrasonic field uniform. Furthermore, it aims at providing an ultrasonic radiation device which
emits ultrasonic waves using this ultrasonic radiator. Furthermore, using this, ultrasonic wave
field distribution can be made to approach more uniformly, or an ultrasonic treatment device
capable of processing more fluid can be provided. A device for transmitting the ultrasonic
vibration of the vibrator 20 to the ultrasonic radiator 1 through the ultrasonic transmitter 302,
and ultrasonicating the fluid to be processed P with the ultrasonic wave emitted from the
ultrasonic radiator 1 It is. The ultrasonic radiator 1 is made of a metal block and performs
primary resonance in the direction of the axis AX, and performs primary resonance in the radial
direction at the large-diameter radiating portion 2 in the disk shape. The ultrasonic waves are
also emitted to the proximal side and the oblique distal side. [Selected figure] Figure 1
Ultrasonic radiator, ultrasonic radiation apparatus, and ultrasonic processing apparatus using the
same
[0001]
The present invention relates to an ultrasonic emitter for emitting ultrasonic waves in a fluid
such as air or liquid, an ultrasonic radiation apparatus, and an ultrasonic processing apparatus
using the same.
[0002]
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1
2. Description of the Related Art It has been conventionally known that a liquid or the like is
irradiated with ultrasonic waves to cause emulsification, dispersion, crushing, chemical reaction
promotion or the like, or a treatment such as washing a solid surface.
For example, Patent Document 1 describes a reaction apparatus in which an ultrasonic oscillator
is attached to the inner wall of a stirring tank, and ultrasonic waves are emitted toward the
center of the tank. Further, in Patent Document 2, a cylindrical or cylindrical radiator emitting
ultrasonic energy is disposed at the center of a bottomed cylindrical reaction vessel, and the side
surface of the radiator, or the other end and the side surface are radiation surfaces. A reactor for
emitting ultrasonic waves into the reaction vessel is described.
[0003]
JP-A-2000-202277 (Page 2, FIG. 1) JP-A-2003-200042 (Page 2, FIG. 1)
[0004]
However, in the reaction device described in Patent Document 1, the ultrasonic oscillator is
disposed on a part of the wall of the tank, from which the ultrasonic waves are emitted toward
the center of the tank, and the radiation area of the ultrasonic energy is also small. , The
distribution of ultrasonic field in the layer becomes uneven.
In addition, since the ultrasonic energy to be emitted is also small, the throughput of the reaction
is small. In addition, when the ultrasonic oscillator is disposed in the tank and the liquid to be
processed is at high temperature or low temperature, the performance of the oscillator may be
deteriorated.
[0005]
Moreover, in the reaction device described in Patent Document 2, since the ultrasonic waves
directed radially outward from the center of the tank are radiated, the distribution of the
ultrasonic waves can be made more uniform than in Patent Document 1. However, in the vicinity
of the distal end portion (other surface) of the radiator, ultrasonic waves are emitted in the axial
direction of the radiator and in the radial direction orthogonal thereto, but ultrasonic waves are
not emitted in the oblique tip direction. Therefore, again, the sound field distribution of the
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2
ultrasonic waves around the radiator becomes nonuniform. Furthermore, a cylindrical radiator or
a cylindrical radiator having a diameter of λ / 3 to λ / 4 is used as the radiator. In a cylinder or
the like having such a thin diameter, if the length is adjusted to nλ / 2, axial vibration due to
resonance is excited and can be vibrated largely in the axial direction. Therefore, strong
ultrasonic waves can be emitted toward the tip of this cylinder. However, since this cylinder is
thin in diameter, it does not resonate in the radial direction, and radial vibration is less likely to
be excited. Specifically, in the radial direction, along with the expansion and contraction due to
the longitudinal vibration, only the vibration that expands and contracts in the radial direction
appears according to the Poisson's ratio. Therefore, even if this radiator is used, the intensity of
the ultrasonic vibration in the radial direction (lateral direction) can not be so great.
[0006]
Therefore, it is conceivable to increase the diameter of the radiator (cylinder), that is, to make it a
thick and short rod. If the diameter of the radiator is increased to the extent that radial resonance
occurs, not only axial vibration but also radial vibration is excited. Therefore, it is expected that
large vibration also occurs in the radial direction. However, even with this configuration, even if
ultrasonic waves can be emitted to the distal end side from the distal end surface, the proximal
end side from the proximal end surface, and the radial direction, ultrasonic waves can not be
emitted to the oblique proximal end side and the oblique tip side. The sound field of the
ultrasound is also uneven.
[0007]
The present invention has been made in view of such problems, and it is an object of the present
invention to provide an ultrasonic emitter which can emit strong ultrasonic waves over a wide
range of surroundings and can make the distribution of the ultrasonic field uniform. Do.
Furthermore, it aims at providing an ultrasonic radiation device which emits ultrasonic waves
using this ultrasonic radiator. Furthermore, it is an object of the present invention to provide an
ultrasonic processing apparatus capable of processing an ultrasonic field distribution more
uniformly or processing more fluid using this.
[0008]
The solution means has the largest radial dimension in the radial direction orthogonal to the axial
direction, and has a large radial portion having a cylindrical or polygonal columnar side surface,
and the axial direction proximal end side of the large radial portion. Adjacent proximal radiation
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portions, which are smaller in radial direction than the large diameter radiation portions, include
a real or imaginary proximal upper surface, and the radial direction is closer to the proximal
upper surface from the large diameter radiation portions. And the tip radiation portion adjacent
to the axial direction tip side of the large diameter radiation portion, wherein the radial
dimension is smaller than that of the large diameter radiation portion, and the actual or
imaginary The dimension in the radial direction decreases as it approaches the upper end bottom
surface from the large diameter radiation portion, or the radial direction from the large diameter
radiation portion toward the axial tip end side. Have a form that reduces in size An ultrasonic
radiation body including an end radiation portion, wherein the radiation portion performs
primary resonance in the axial direction when ultrasonic vibration of a predetermined frequency
is applied to the ultrasonic radiation body. It is an ultrasonic radiator which has a shape which
carries out primary resonance in the above-mentioned radial direction in the above-mentioned
large diameter radiation part.
[0009]
In the ultrasonic radiator of the present invention, the radiation portion resonates not only in the
axial direction but also in the radial direction at a predetermined frequency (resonance
frequency).
Therefore, if the ultrasonic radiator is ultrasonically vibrated at resonance frequency in air or in
liquid, the side surface of the large-diameter radiation part vibrates largely, and strong ultrasonic
waves are emitted radially from this side surface. Can. Moreover, the proximal radiation portion
has a form in which the dimension in the radial direction gradually becomes smaller as the
proximal radiation portion is farther from the large diameter radiation portion. For this reason,
from the surface (inclined surface) of a portion of the surface of the proximal radiation portion
that continues to the side surface of the large diameter radiation portion and the dimension in
the radial direction decreases with increasing distance from the large diameter radiation portion
toward the axial direction The ultrasonic wave is emitted in a direction oblique to both the axial
direction and the radial direction (diagonal proximal direction (direction inclined to the proximal
side from the radial direction)). Similarly, in the tip radiation portion, a direction connecting the
side surface of the large diameter radiation portion and the top bottom surface of the tip or the
surface of the tip radiation portion in the axial direction and in the radial direction Ultrasonic
waves are emitted in the For this reason, by using this ultrasonic radiator, ultrasonic waves can
be emitted over a wide range around it, so it is easy to make the ultrasonic field formed around
the ultrasonic radiator uniform.
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[0010]
Furthermore, this ultrasonic emitter includes a proximal radiation portion, a large diameter
radiation portion, and a tip radiation portion, and each surface has a radiation portion that
performs ultrasonic vibration. Therefore, the radiation portion can be in contact with the fluid in
a wide radiation area. Therefore, since ultrasonic vibration can be transmitted to the fluid on
each surface, a large amount of ultrasonic energy can be transmitted to the fluid, and by using
this ultrasonic radiator, ultrasonication of a larger amount of fluid can be performed. It can be
performed. また、
[0011]
In this ultrasonic radiator, when viewed in the axial direction, the primary resonance in the axial
direction with the central portion of the large-diameter radiation portion as a node and the base
near the base and upper base of the base end and the tip upper surface as the antinode In the
radial direction, in the radial direction, in the case of vibration due to a vibration mode in which
the central portion of the large-diameter radiation portion is a node and the radial primary
resonance with the side (peripheral surface) of the large-diameter radiation portion as an
antinode There are many. Depending on the shape of the radiator, the axial temporal resonance
and the radial temporal resonance may be in opposite phase or in phase (respiratory vibration).
[0012]
In the case where the proximal upper surface is present, the proximal radiation portion is
gradually tapered toward the proximal side such as a tapered shape, and the proximal upper
surface is present as an end surface (a proximal surface) of the radiator. There is a case. On the
other hand, in the case where the base end upper bottom surface is virtual, the base end
radiation portion of the ultrasonic wave emitter has a form such as a tapered shape which
gradually sinks toward the base end side, while on the other hand, The proximal end side further
has a form in which a plate-like portion (buffer portion), a part of an ultrasonic transducer (such
as a front plate), or a transmission rod coupled to the ultrasonic transducer extends. Although it
does not exist in the body, there are cases where the proximal upper surface can be conceived as
an end surface forming the upper base on the proximal side of the tapered proximal radiation
portion. Similarly, the case where the top and bottom end of the tip is present means that the tip
radiation portion is gradually tapered toward the tip side such as a tapered shape, and the top
and bottom end of the tip is present as an end face (tip face) of the radiator. Be On the other
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hand, in the case where the top and bottom of the tip is virtual, the tip radiation portion of the
ultrasonic radiator is gradually tapered toward the tip, such as a tapered shape, while the tip side
is more distal than the top and bottom of the tip Furthermore, it is coupled to a plate-like portion
(buffer portion), a part (such as a front plate) of an ultrasonic transducer other than the
ultrasonic transducer connected to the proximal side, or this other ultrasonic transducer This is
the case where the transmission rod is extended, and although not present in the ultrasonic
radiator, there are cases where the top and bottom of the tip can be conceived as an end face
forming the top and bottom of the tip of the tapered tip.
[0013]
In addition, the base end radiation portion may be configured so as to gradually reduce the
diameter from the large diameter emission portion to the base end upper bottom surface, and in
the case of diameter reduction at a constant rate (conical cone, truncated pyramid shape),
smooth concave shape Alternatively, a smooth convex shape such as a spherical shape may be
used. In order to secure the area of the inclined surface to a certain extent, the radial dimension
of the base upper surface is preferably 60% or less of the radial dimension of the large diameter
radiation portion. Similarly, the tip radiation portion may be configured so as to gradually reduce
the diameter from the large diameter radiation portion to the top bottom surface of the tip, and
in the case of diameter reduction at a constant rate (conical cone, truncated pyramid shape),
smooth concave shape or A smooth convex shape such as a spherical shape may be used.
Alternatively, any shape may be used as long as the diameter gradually decreases from the largediameter radiation portion to the tip side, and it may be a smooth concave shape, a smooth
convex shape such as a spherical shape, etc. . In the case where the top and bottom end surfaces
are provided, the radial dimension of the top and bottom end surfaces may be 60% or less of the
radial dimension of the large diameter radiation portion in order to secure the area of the
inclined surface to a certain extent.
[0014]
Further, another solution means has the largest radial dimension in the radial direction
orthogonal to the axial direction, and has a large radial portion having a cylindrical side surface,
and the above-mentioned axial direction proximal end side of the large radial portion. Adjacent
proximal radiation portions, which are smaller in radial direction than the large diameter
radiation portions, include a real or imaginary proximal upper surface, and the radial direction is
closer to the proximal upper surface from the large diameter radiation portions. And a tip
radiation portion adjacent to the axial tip end side of the large diameter radiation portion,
wherein the radial dimension is smaller than that of the large diameter radiation portion, and Or
a radiation portion including a virtual tip upper and lower surface, and a tip radiation portion
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having a frusto-conical shape in which the dimension in the radial direction decreases from the
large diameter radiation portion toward the upper surface. A body, wherein the radiation unit is
the ultrasound emitter An ultrasonic wave having a shape in which when ultrasonic vibration of a
predetermined frequency is applied, primary resonance occurs in the axial direction, and primary
resonance in the opposite direction to primary resonance in the axial direction occurs in the
radial direction in the large diameter radiation portion. It is a radiator.
[0015]
Also in the ultrasonic radiator of the present invention, the radiation portion resonates at a
predetermined frequency (resonance frequency) in both the axial direction and the radial
direction.
For this reason, when the ultrasonic radiator is vibrated at a resonant frequency in air or in
liquid, the cylindrical side surface of the large-diameter radiation portion vibrates largely, and
strong ultrasonic waves are emitted radially from this side surface. Can. Moreover, since the base
end radiation portion has a truncated cone shape, ultrasonic waves can be emitted from the
surface of the base end radiation portion in the oblique base direction oblique to both the axial
direction and the radial direction. . Also, similarly, since the tip radiation portion has a truncated
cone shape, ultrasonic waves are emitted in the axial direction from the top and bottom surface
of the tip portion of the tip radiation portion, and from the side surface in both axial and radial
directions Ultrasonic waves can also be emitted in the oblique tip direction. For this reason, by
using this ultrasonic radiator, ultrasonic waves can be emitted over a wide range around it, so it
is easy to make the ultrasonic wave field formed around this ultrasonic radiator uniform.
[0016]
Furthermore, this ultrasonic emitter includes a proximal radiation portion, a large diameter
radiation portion, and a tip radiation portion, and each surface has a radiation portion that
performs ultrasonic vibration. Therefore, the radiation portion can be in contact with the fluid in
a wide radiation area, and ultrasonic vibration can be transmitted to the fluid on each surface, so
that a large amount of ultrasonic energy can be transmitted to the fluid. Therefore, by using this
ultrasonic emitter, it is possible to ultrasonicate a larger amount of fluid.
[0017]
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Furthermore, it is an ultrasonic wave emitter according to any of the above, and obtained by the
following equation (1) using Young's modulus E and density ρ of the material constituting the
radiation portion of the ultrasonic wave emitter and the predetermined frequency fr. With
respect to the wavelength λz of longitudinal vibration, λz = (E / ρ) <1/2> (1) It is preferable to
use an ultrasonic radiator in which the radial dimension of the base end upper bottom surface is
λz / 2.6 or less .
[0018]
Generally, it is known that longitudinal vibration is easily excited and the magnitude of radial
vibration is very small for a thin rod whose diameter is sufficiently small compared to the
wavelength of longitudinal vibration (axial vibration).
Assuming that the Young's modulus of the material forming the radiation portion is E, the density
is ρ, and the frequency is fr, the speed of sound Cz of longitudinal vibration is given by Cz = √
(E / ρ) = (E / ρ) <1/2> . Further, the wavelength λz is given by λz = Cz / fr = (E / ρ) <1/2> /
fr. However, as the diameter of the rod increases, not only longitudinal vibration, but also radial
vibration (radial stretching wave) orthogonal to this is excited, and these waves couple and affect
each other. Become. For this reason, in the ultrasonic radiator of the present invention, in the
case where ultrasonic vibration in the axial direction is given to the ultrasonic radiator through
the proximal upper surface, the radial dimension of the proximal upper surface is the
longitudinal vibration. If the ultrasonic vibration in the axial direction is given to the ultrasonic
emitter through the base upper surface at a size of about half (λz / 2) or more with respect to
the wavelength λz of It can be considered that the magnitude of the vibration of (1) can not be
ignored, and the efficiency in transmitting the ultrasonic vibration in the axial direction to the
distal side through the proximal upper surface is lowered.
[0019]
Conversely, if it is smaller than about λz / 2, specifically, λz / 2.6 or less as in the present
invention, axial vibration is mainly excited at the base upper surface, so this base end Vibration
energy from the outside can be efficiently transmitted to the tip side (the large diameter radiation
side) through the top and bottom surfaces. The radial dimension of the upper end of the base end
may be appropriately selected according to the magnitude of the ultrasonic energy to be
transmitted to the ultrasonic radiator within the range of the above limitation, but large
ultrasonic energy is transmitted. If desired, it is preferable to set the radial dimension to λz / 4
04-05-2019
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or more.
[0020]
And an ultrasonic vibration source fixed to the ultrasonic radiator and giving ultrasonic vibration
through the upper surface of the proximal end. good.
[0021]
The ultrasonic radiation apparatus of the present invention includes the above-mentioned
ultrasonic radiator and an ultrasonic vibration source for giving ultrasonic vibration thereto.
According to this ultrasonic radiation apparatus, the distribution of the ultrasonic sound field can
be easily made uniform, and the ultrasonic radiation apparatus can be made to have a large
radiation area. As an ultrasonic vibration source, a known ultrasonic transducer such as a boltclamped Langevin ultrasonic transducer, an ultrasonic transducer and an ultrasonic transducer
connected to the ultrasonic transducer for transmitting ultrasonic energy are used. And the like.
Also included is an ultrasonic vibration source comprising a plurality of ultrasonic transducers
and a power combining device for integrating and transmitting these vibration energy.
[0022]
Furthermore, the treatment tank which accommodates the fluid which is a to-be-processed
object, and a to-be-processed object, and at least the said radiation | emission part are arrange |
positioned in the said processing tank, The said claim 1 And an ultrasonic vibration source fixed
to the ultrasonic radiator and giving ultrasonic vibration through the upper surface and the lower
surface of the proximal end.
[0023]
The ultrasonic treatment apparatus of the present invention includes a treatment tank, the abovementioned ultrasonic radiator in which a radiation unit is disposed in the treatment tank, and an
ultrasonic vibration source.
For this reason, it is possible to create an ultrasonic wave field having a uniform distribution in
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the treatment tank, and to ultrasonically treat many objects to be processed properly.
[0024]
The object to be treated may be immersed in a fluid such as a fluid, a fluid (a mixture of fluid
solid and liquid, etc.), a supercritical fluid, or a liquid such as water, a solvent, or a cleaning
solution, as well as a gas or a liquid. An object to be cleaned can be mentioned. In addition, as the
ultrasonic treatment, any treatment may be included as long as the treatment is given a desired
change by irradiating the object with ultrasonic waves. For example, emulsification, dispersion,
crushing, defoaming, promotion of a chemical reaction, water treatment of sludge, fuel reforming,
washing of an object to be cleaned, etc. by ultrasonic irradiation may be mentioned.
[0025]
Examples of the embodiment of the present invention and Modifications 1 and 2 will be
described with reference to the drawings.
[0026]
First, an embodiment will be described with reference to FIGS. 1 to 3.
The ultrasonic processing apparatus 100 according to the present embodiment comprises an
ultrasonic vibration source 40, an ultrasonic oscillation circuit 50, a treatment tank 60, and an
ultrasonic radiator 1. Among them, the ultrasonic vibration source 40 is a known bolt-clamped
Langevin type ultrasonic vibrator 20 using piezoelectric ceramic, and an ultrasonic wave
transmission for transmitting ultrasonic vibration generated thereby to the ultrasonic radiator 1
It consists of the body 30. The ultrasonic oscillation circuit 50 is a known drive circuit for driving
the ultrasonic transducer 20 at a predetermined frequency (resonance frequency fr). The
ultrasonic radiator 1 is disposed in the treatment tank 60, and emits ultrasonic waves to the fluid
P to be treated in the treatment tank 60 by the ultrasonic vibration transmitted from the
ultrasonic vibration source 40, thereby the fluid to be treated P Perform the desired treatment
(emulsification, dispersion, crushing, etc.). The processing tank 60 discharges the processing
target fluid P from the processing tank main body 61, the inflow pipe 62 connected to the
processing tank main body 61 for causing the processing fluid P to flow into the processing tank
main body 61, and the processing tank 60. It consists of a discharge pipe 63.
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[0027]
The ultrasonic vibration source 40 is composed of the ultrasonic transducer 20 and the
ultrasonic wave transmitting body 30, and is arranged concentrically along the axis AX and is
connected to each other by a connecting screw 41. In addition, the ultrasonic radiator 1 is
connected by the connecting screw 42 at the tip (the lower end in FIG. 1B) of the ultrasonic
transmitter 30.
[0028]
The ultrasonic radiator 1 is a metal block body formed by scraping a metal block of stainless
steel (SUS 304), and as shown in FIG. It has a radiation portion 7 including a proximal radiation
portion 3 located at the upper side in 1 (b) and a distal radiation portion 4 located at the distal
end side (lower side in FIG. 1 (b)). In the present embodiment, the radiation portion 7 is equal to
the entire ultrasonic emitter 1. Among them, the large diameter radiation portion 2 is a disk
shape having a diameter Dmax, and is the largest diameter in the radial direction (left and right
direction in the figure) orthogonal to the axis AX compared with the base end radiation portion 3
and the tip radiation portion 4 It has the form of On the other hand, the base end radiation part 3
has a truncated cone shape in which the base end upper base surface (base end face) 3B
(diameter Db) existing as an upper base and the diameter decreases in the radial direction toward
the base end side There is. Further, the tip radiation portion 4 also has a frusto-conical shape in
which the actual tip upper bottom surface (tip surface) 4B (diameter Dt) is the top and the
diameter is reduced in the radial direction toward the tip side (downward in the figure). In
addition, in the proximal end face 3B of the proximal end radiation portion 3, a connecting screw
hole 9 for coupling with the ultrasonic wave transmission body 30 is bored.
[0029]
In the ultrasonic processing apparatus 100, the ultrasonic oscillator circuit 50 vibrates the
ultrasonic transducer 20 in a direction along the axis AX as shown by an arrow in FIG. Then,
longitudinal vibration is also transmitted to the ultrasonic radiator 1 through the base upper
surface 3B. The flange portion 31 of the ultrasonic wave transmission body 30 is selected so as
not to vibrate as a node of the longitudinal vibration, and the ultrasonic wave transmission body
30 is processed by a known fixing means (not shown) in the flange portion 31. The ultrasonic
transducer 20 and the ultrasonic radiator 1 are also fixed to the treatment tank main body 61 by
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being fixed to the tank main body 61.
[0030]
The sound velocity Cz of longitudinal vibration obtained from the Young's modulus Ez and the
density ρ of the material forming the ultrasonic radiator 1 is Cz = 1 (Ez / ρ). Accordingly, the
wavelength λz in the case of the frequency fr is λz = (Ez / ρ) <1/2> / fr. Therefore, in the
ultrasonic radiator 1 of the present embodiment, the maximum diameter Dmax of the ultrasonic
radiator 1 is set to a size exceeding λz / 2.6 and further λz / 2, and this ultrasonic radiator 1 is
particularly large in diameter In the portion, radial vibration is excited.
[0031]
In the case of a large diameter (thick) resonator such as the ultrasonic radiator 1, since
longitudinal vibration and radial vibration interact with each other and are coupled, the
longitudinal vibration in the case of transmitting a thin rod The sound velocity of apparent
longitudinal vibration is slower than the sound velocity of vibration. In addition, the sound
velocity in the apparent radial direction is slower than the sound velocity of the radial vibration
of the thin disk. Therefore, in the present embodiment, in consideration of the relationship
between the velocity of sound of longitudinal vibration and radial vibration and the size of the
vibration, when the longitudinal vibration of the predetermined frequency fr is transmitted from
the base upper surface 3B to the shape of the ultrasonic radiator 1 The primary resonance in the
direction of the axis AX and the primary resonance in the radial direction of the large-diameter
radiation portion 2 are also made, specifically, the above-mentioned shape.
[0032]
Next, FIG. 3 shows a deformed state when the ultrasonic radiator 1 is resonated. As shown in FIG.
3, the ultrasonic radiator 1 has a large diameter radiation portion 2 at a phase φ = 90 degrees
indicated by a two-dot chain line with respect to the shape at a phase φ = 0 degrees indicated by
a solid line. As the diameter (Dmax) increases, the thickness H (the dimension in the vertical
direction in the drawing) of the ultrasonic radiator 1 including the large diameter radiation
portion 2 is deformed. Although not shown, at the time of phase φ = −90 degrees, conversely to
this, the diameter of the large diameter radiation portion 2 becomes smaller and the thickness of
the ultrasonic radiator 1 becomes larger. Transform into Further, in FIG. 3, in order to make it
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easy to understand the state of deformation, the amount of deformation is emphasized and
described, but the actual amount of deformation is much smaller than that shown in FIG.
[0033]
As can be understood from this deformed state, in the ultrasonic radiator 1, the central portion of
the large diameter radiation portion 2 is a node when viewed in the axial direction (vertical
direction in the figure), and the base upper surface 3B and the tip upper surface 4T There is a
primary resonance around the area. Similarly, when viewed in the radial direction (left and right
direction in the drawing), primary resonance is generated with the central portion of the large
diameter radiation portion 2 as a node and the side surface (circumferential surface) of the large
diameter radiation portion 2 as an antinode. Moreover, the axial vibration (longitudinal vibration)
and the radial vibration fluctuate in opposite phases so that the dimension (diameter) in the
radial direction becomes larger as the dimension (thickness) in the axial direction becomes
smaller.
[0034]
Then, in the ultrasonic radiator 1 having such resonance, in the large diameter radiation portion
2, the side surface 2S (cylindrical surface) vibrates largely due to the resonance in the radial
direction, as shown in FIG. Radially strong ultrasonic waves can be emitted. In the base end upper
bottom surface 3B and the tip upper end bottom surface 4T, they are respectively in reverse
phase and vibrate largely in the axial direction to be strong at the base end side in the axial
direction and at the tip end side (upper and lower in the figure). Ultrasonic waves can be emitted.
[0035]
Furthermore, as can be understood by comparing the solid line in FIG. 3 with the two-dot chain
line, in the ultrasonic wave emitter 1 of the present embodiment, the inclined surface 3S of the
proximal end radiation portion 3 and the inclined surface 4S of the distal end radiation portion 4
are also It can be seen that the vibration component is in the direction orthogonal to the inclined
surface. That is, in the ultrasonic wave emitter 1 of the present embodiment, also from the
inclined surface 3S of the proximal end radiation portion 3 and the inclined surface 4S of the
distal end radiation portion 4, a direction orthogonal to the inclined surface, that is, a direction
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oblique to the axis AX Specifically, it can be seen that ultrasonic waves are emitted toward the
oblique proximal side or the oblique distal side.
[0036]
For example, as can be seen if it is assumed that a cylindrical ultrasonic emitter having the same
diameter as the proximal upper surface 3B is assumed, even a cylindrical ultrasonic emitter can
emit ultrasonic waves in the radial direction and the axial direction. it can. However, unlike the
ultrasonic radiator 1 of the present embodiment, it is not possible to radiate ultrasonic waves
toward the oblique proximal side or the oblique distal side. Thus, if the ultrasonic radiator 1 of
the present embodiment is placed in the treatment tank main body 61 and ultrasonic waves are
emitted, not only the strong ultrasonic waves can be emitted in the radial and axial directions,
but also the inclined surface 3S and From 4S, ultrasonic waves can be emitted also to the oblique
proximal side and the oblique tip side of the ultrasonic radiator 1. Thus, it is easy to make the
sound field of the ultrasonic waves generated in the processing tank body 61 uniform. Therefore,
in the ultrasonic processing apparatus 100 using this ultrasonic radiator 1, it becomes easy to
make processing of the to-be-processed fluid P uniform.
[0037]
Furthermore, since the ultrasonic radiator 1 has the inclined surfaces 3S and 4S and can emit
ultrasonic waves also to the oblique base end side and the oblique tip side, the ultrasonic
radiation area is large, and the base end The energy of the ultrasonic vibration transmitted
through the top and bottom surfaces 3B can be efficiently radiated toward the fluid P to be
treated. Therefore, in the ultrasonic processing apparatus 100 using the ultrasonic radiator 1,
many processing fluids P can be processed in the processing tank 60.
[0038]
Modified Example 1 Next, a first modified example of the present embodiment will be described
with reference to FIG. The ultrasonic radiator 101 according to the first modification is made of
stainless steel as in the embodiment. Further, as can be easily understood by comparison with the
ultrasonic wave emitter 1 of the embodiment (see FIG. 2), the large diameter radiation portion
102, the base end radiation portion 103 and the tip radiation portion 104 respectively have the
diameters of the embodiment. The shape is substantially the same as that of the radiation portion
04-05-2019
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2, the proximal radiation portion 3, and the tip radiation portion 4.
[0039]
However, in the first modification, the base end upper bottom surface 103B of the base end
radiation portion 103 does not exist (it is a virtual base upper end base surface), and the
thickness direction (axis in the upper side in the figure) Point) has the same diameter disk-shaped
base end cushioning portion 105, and the tip upper surface 104B of the tip radiation portion
104 does not exist (it is a virtual tip upper surface) and the tip side (figure The embodiment
differs from the embodiment in that a disc-shaped tip-end cushioning portion 106 having the
same diameter in the thickness direction is also provided in the lower middle). For this reason,
the ultrasonic radiator 101 of the first modification includes the large-diameter radiation portion
102, the proximal radiation portion 103, the distal radiation portion 104, the proximal plate
portion 105, and the distal plate portion 106. It has 107. Also in the first modification, the
radiation portion 107 is equal to the entire ultrasonic emitter 101.
[0040]
Although the diameter Dmax of the large-diameter radiation portion 102 is the same as that of
the embodiment, the axial dimension H1 of the ultrasonic wave emitter 101 (from the proximal
end surface 105B including the proximal end cushioning portion 105 and the distal end
cushioning portion 106) The dimensions up to 106 T have slightly different values so as to make
primary resonance also in the axial direction.
[0041]
Therefore, instead of the ultrasonic wave emitter 1 of the embodiment, the ultrasonic wave
emitter 101 of the present modification 1 is attached to the ultrasonic wave transmission body
30 using the connection screw hole 109 and ultrasonically vibrated, the axis AX The primary
resonance can be made in the direction, and the primary radiation can also be made in the radial
direction in the large diameter radiation portion 102.
Accordingly, even with this ultrasonic radiator 101, strong ultrasonic waves can be emitted
radially from the side surface 102S, from the proximal end surface 205B to the proximal side in
the axial direction, and from the distal end surface 206T to the distal side in the axial direction.
In addition, ultrasonic waves can be emitted from the inclined surface 103S to the oblique base
04-05-2019
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end side and from the inclined surface 104S to the oblique tip side.
[0042]
Thus, even if the ultrasonic emitter 101 of the present modification 1 is installed in the treatment
tank main body 61 and the ultrasonic wave is emitted, the ultrasonic wave is also applied to the
oblique base end side and the oblique tip side of the ultrasonic emitter 101. It can be emitted,
and it is easy to make the sound field of the ultrasonic wave generated in the processing tank
body 61 uniform. Therefore, the treatment of the fluid P to be treated can be easily made
uniform.
[0043]
Furthermore, since ultrasonic waves can be radiated also to the oblique proximal side and the
oblique tip side by this ultrasonic radiator 101, the ultrasonic radiation area is large, and through
the proximal end surface 105B and the virtual base upper surface 103B. The energy of the
transmitted ultrasonic vibration can be efficiently radiated toward the fluid P to be treated.
Therefore, many treated fluids P can be treated in the treatment tank 60.
[0044]
(Modification 2) Furthermore, the 2nd modification of a present Example is demonstrated with
reference to FIG. The ultrasonic wave emitter 201 according to the second modification is made
of stainless steel as in the embodiment. However, as can be easily understood by comparison
with the ultrasonic wave emitter 1 of the embodiment (see FIG. 2), the ultrasonic wave emitter 1
and the ultrasonic wave transmission body 30 in the embodiment are integrally formed. It differs
in the point. That is, in the embodiment described above, the ultrasonic radiator 1 is connected to
the ultrasonic transmitter 30 by the connecting screw 42. On the other hand, the ultrasonic wave
emitter 201 of the second modification includes the ultrasonic wave transmission unit 205
integrally in addition to the radiation unit 207 including the large diameter radiation part 202,
the proximal radiation part 203, and the tip radiation part 204. There is. Further, in the
ultrasonic wave transmission unit 205, the ultrasonic wave emitter 201 has a connection screw
hole 205N for connection with the ultrasonic transducer 20 in the connection surface 205C.
04-05-2019
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[0045]
Therefore, instead of the ultrasonic wave emitter 1 and the ultrasonic wave transmission body 30
of the embodiment, the ultrasonic wave emitter 201 of the present modification 2 is attached to
the ultrasonic transducer 20 using the connecting screw hole 205N, The radiation device 210
can be used as an ultrasonic processing device 200 (see FIG. 1 (b)) using this. Also in the
ultrasonic processing apparatus 200, when the ultrasonic transducer 20 is ultrasonically
vibrated, the radiation portion 207 including the large diameter radiation portion 202, the base
end radiation portion 203, and the tip radiation portion 204 extends in the axial line AX
direction. The primary resonance occurs, and the primary radiation also occurs in the radial
direction in the large diameter radiation portion 202. Accordingly, even in the ultrasonic radiator
201, the radial direction from the side surface 202S, and the proximal end side in the axial
direction from the proximal upper surface (proximal surface) 203B, and the axial direction distal
end from the distal upper surface (tip surface) 204T. It can emit powerful ultrasound to the side.
In addition, ultrasonic waves can be emitted from the inclined surface 203S to the obliquely
proximal side, and from the inclined surface 204S to the obliquely distal side.
[0046]
Thus, even if the ultrasonic emitter 201 of the present modification 2 is installed in the treatment
tank main body 61 to emit ultrasonic waves, the base end side of the proximal end radiation
portion 203 and the oblique tip end side of the distal end radiation portion 204. Also, ultrasonic
waves can be emitted, and it is easy to make the sound field of the ultrasonic waves generated in
the processing tank body 61 uniform. Therefore, even in the ultrasonic processing apparatus
200 using the ultrasonic radiator 201, it is easy to make the processing of the fluid P to be
processed uniform.
[0047]
Furthermore, since ultrasonic waves can be radiated also to the oblique proximal side and the
oblique tip side by this ultrasonic emitter 201, the ultrasonic radiation area is large, and the
ultrasonic vibration transmitted through the base upper surface 203B is Energy can be efficiently
radiated toward the fluid P to be treated. Therefore, even in the ultrasonic processing apparatus
200 using the ultrasonic radiator 201, many processing fluids P can be processed in the
processing tank 60.
04-05-2019
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[0048]
Furthermore, in the ultrasonic wave emitter 201 of the second modification, an ultrasonic wave
transmission unit 205 for transmitting ultrasonic vibration, a radiation unit 207 for emitting
ultrasonic waves (large diameter radiation unit 202, base end radiation unit 203, and The tip
radiation portion 204) is formed of an integral metal block. Therefore, unlike the ultrasonic
processing apparatus 100 and the ultrasonic radiation apparatus 10 of the embodiment in which
the ultrasonic radiator 1 and the ultrasonic transmitter 30 are connected by the connecting
screw 42, the processing under high temperature, high pressure, low temperature, etc. Even
when using an ultrasonic processing apparatus under severe conditions, such as the treatment of
highly corrosive liquids, the treatment of highly clean liquids, etc., the connecting screw 42 may
not be used, resulting in the loosening of the connecting screw 42. There are advantages such as
no, easy cleaning.
[0049]
Although the present invention has been described based on the embodiment and the two
modifications, the present invention is not limited to the above embodiment and the like, and can
be appropriately modified and applied without departing from the scope of the invention.
Needless to say. For example, in the ultrasonic radiation apparatus 210 of the second
modification, the radiation portion 207 may have the same shape as the radiation portion 107 as
in the first modification, that is, a shape in which a base end plate and a tip end plate are further
provided. good. Furthermore, although the large diameter radiation portion 2 and the like are
formed in a cylindrical shape in each of the above-described embodiments and the like, for
example, they may be formed in a prismatic shape such as a regular octagonal prism. Along with
this, the proximal radiation portion and the distal radiation portion can also be formed in a
truncated pyramid shape. However, since the intensity of the emitted ultrasonic waves may
fluctuate in the circumferential direction of the axis line AX, it is preferable to have a cylindrical
shape.
[0050]
Further, in the above-described embodiment and the like, the base end radiation portion 3 and
the like are used as the base and the upper bottom surface 3B as the upper base, the diameter is
reduced at a constant rate, and the inclined surface 3S and the like are used as the conical
04-05-2019
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surface. However, the base end radiation portion may have a form in which the diameter
decreases toward the base end upper bottom surface, and may be a smooth concave shape or a
smooth convex shape such as a spherical shape. Similarly, the distal end radiation portion 4 and
the like may have a form in which the diameter decreases toward the upper bottom of the distal
end, and may be a smooth concave shape or a smooth convex shape such as a spherical shape.
Furthermore, the tip radiation portion may have a cone shape (conical shape, pyramid shape), a
smooth concave shape, a smooth convex shape such as a spherical shape, or the like without a tip
upper bottom surface.
[0051]
Furthermore, although the processing tank main body 61 of the processing tank 60 has a
substantially rectangular parallelepiped shape in this embodiment, it has a cylindrical shape with
the axis AX as a central axis, other properties of the fluid to be processed, and ultrasonic waves
generated in the processing tank. An appropriate shape can be made according to the degree of
uniformity of the sound field and the like. In order to make it difficult to generate a standing
wave and improve the uniformity of the ultrasonic field, the wall surface of the treatment tank
main body should be a flat surface or a curved surface oblique to the axis AX or the radial
direction orthogonal to this. Can. Further, the treatment fluid P was allowed to flow into the
treatment tank main body from the left in FIG. 1 (b) using one inflow pipe 62, and was
discharged to the right in FIG. 1 (b) using the discharge pipe 63. An example is shown. However,
the diameter, number, position, etc. of the inflow pipe and the outflow pipe may be appropriately
selected according to the properties of the fluid to be treated and the material to be treated. In
addition, in order to perform batch processing instead of continuous processing, it is also
possible to use a processing tank which is not provided with the inflow pipe or the outflow pipe.
[0052]
In the above embodiment, the ultrasonic radiator 1 and the like are made of stainless steel, but
an appropriate material may be selected according to the object to be treated and the treatment
conditions, for example, Hastelloy, etc. A metal such as inconel, titanium, a titanium alloy,
aluminum, duralumin, or a ceramic such as alumina, silicon nitride, or silicon carbide can be
used. In the above embodiment, an example in which a bolt-clamped Langevin-type ultrasonic
transducer using a piezoelectric ceramic is used as the ultrasonic transducer 20 has been
described. However, if it is an ultrasonic transducer capable of generating ultrasonic vibration.
Alternatively, a magnetostrictive material, an ultrasonic transducer using an electrostrictive
material, or the like can be used. Moreover, in the example etc., the example which processes a
04-05-2019
19
treatment tank, such as emulsification, etc. about the to-be-processed fluid P was shown in the
processing tank was shown. However, water, a cleaning solution, etc. and machine parts and
other objects to be treated can be put into the treatment tank and the objects to be treated can be
cleaned by ultrasonic waves.
[0053]
It is a figure showing an ultrasonic radiator, an ultrasonic radiation device, and an ultrasonic
treatment device concerning an example, (a) is a top view in the state which saw through the
upper surface of a processing tank, (b) fractures a processing tank It is a front view shown. It is a
front view of the ultrasonic radiator concerning an example. It is explanatory drawing for
demonstrating the oscillation mode which arises when making the ultrasonic radiator which
concerns on an Example resonate, and the shape of an ultrasonic radiator at the time of phase 0
degree (solid line) and phase 90 degree (broken line). FIG. It is a front view which shows the
shape of the ultrasonic wave radiating body which concerns on the modification 1. FIG. It is a
front view which shows the shape of the ultrasonic wave radiating body which concerns on the
modification 2. FIG.
Explanation of sign
[0054]
AX axis line P fluid to be processed 1, 101, 201 ultrasonic radiator 2, 102, 202 large-diameter
radiation part 2S, 102S, 202S side surface 3, 103, 203 base-end radiation part 3S, 103S, 203S
inclined surface 3B, 203B End upper bottom surface (actual), proximal end surface 103B
proximal end upper bottom surface (imaginary) 4, 104, 204 tip radiation portion 4S, 104S, 204S
inclined surface 4T, 204T upper end top surface (actual), tip surface 104T upper end bottom
surface (virtual 105 proximal end plate-like portion 105B proximal end face 106 distal end platelike portion 106T distal end face 205 ultrasonic wave transmission portion 205C connection
surface 205F flange portion 7,107,207 radiation portion 9,109,205N connection screw hole
10,210 ultrasonic radiation Apparatus 20 ultrasonic transducer 30 ultrasonic transmitter 31
flange part 40 ultrasonic vibration source 41, 42 connection screw 50 Wave oscillating circuit
60 processing tank 61 processing tank body 62 flows into pipe 63 outlet tube 100, 200
sonicator
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