close

Вход

Забыли?

вход по аккаунту

?

DESCRIPTION JP2012125743

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2012125743
An ultrasonic transducer unit is provided that improves the cleaning power by making the
vibration mode of the vibration surface uniform. An ultrasonic transducer unit according to the
present invention includes a vibrating surface 1a and first to third transducers 5a adjacent to
each other and applying ultrasonic vibration to the vibrating surface 1a. The other side of 10 has
a first to third first area 3 and a second area 4 covering each of the first areas 3, and the first to
third vibrators are arranged in the first area 3. The thickness of the plate-like vibrator 10 located
inside the triangle formed in the other surface by the first to third vibrators and located in the
second region 4 is the first to third first regions The thickness of the plate-like vibrating body
positioned at 3 is greater than that of the plate-like vibrating body, the distance between the first
to third vibrators is λ / 2 or more, and the outer circumference of the first region 3 is the first to
third vibrations. Each child is separated by λ / 4 or more. λ is the wavelength of the transverse
wave of the plate-like oscillator. [Selected figure] Figure 1
Ultrasonic transducer unit
[0001]
The present invention relates to an ultrasonic transducer unit and the like for applying ultrasonic
waves to cleaning fluid in a cleaning tank.
[0002]
FIG. 8 (A) is a plan view showing a conventional ultrasonic transducer unit, and FIG. 8 (B) is a
cross-sectional view taken along 7B-7B 'shown in FIG. 8 (A).
14-04-2019
1
[0003]
The conventional ultrasonic transducer unit applies ultrasonic waves to the cleaning liquid in the
cleaning tank (not shown) from the vibrating surface, and for example, a type of ultrasonic
vibration that is used by throwing the ultrasonic transducer unit into the cleaning tank You may
use as a child.
[0004]
The ultrasonic transducer unit has a diaphragm 101 made of SUS having a constant thickness,
and a vibrating surface 101 a is formed on one surface of the diaphragm 101.
A plurality of bolt-clamped Langevin vibrators (hereinafter referred to as “BL vibrators”) are
provided on the other surface of the diaphragm 101.
The plurality of BL transducers 102 apply ultrasonic vibration to the vibration surface 101a.
[0005]
Since the BL vibrator 102 generally has a circular vibration surface, the vibration from the BL
vibrator 102 spreads in a circle on the vibration surface 101 a of the diaphragm 101 and
interferes with the vibration from the next BL vibrator and becomes complicated. Vibration mode
is generated.
More specifically, the vibrating surface 101a is affected by the vibration from the adjacent BL
transducer 102 in addition to the original longitudinal vibration, and a complex vibration mode
of lateral vibration is generated, and the ultrasonic power is concentrated on a specific
transducer. And there is a problem that the cleaning effect is reduced.
[0006]
Therefore, in the ultrasonic transducer unit, the vibration mode of the vibration surface 101a is
improved, and equalization of the sound field and improvement of the cleaning effect are
required.
14-04-2019
2
[0007]
An object of one aspect of the present invention is to provide an ultrasonic transducer unit that
makes the vibration mode of the vibration surface uniform and improves the cleaning power.
[0008]
One aspect of the present invention is an ultrasonic transducer unit for irradiating a cleaning
liquid in a cleaning tank with an ultrasonic wave, comprising: a plate-like vibrator; a vibration
surface formed on one surface of the plate-like vibrator; First to third vibrators mounted on the
other surface of the plate-like vibrating body and adjacent to each other and applying ultrasonic
vibration to the vibrating surface; and the other surface of the plate-like vibrating body is And a
second region covering each of the first to third first regions, wherein the first vibrator is
disposed in the first first region. The second vibrator is disposed in the second first area, the
third vibrator is disposed in the third first area, and the first to third vibrators are disposed in the
other surface. The thickness of the plate-like vibrator located inside the triangle to be made and
located in the second region is the first to the fourth The first to third regions are formed thicker
or thinner than the thickness of the plate-like vibrator, and the distance between the first to third
vibrators is λ / 2 or more. An outer periphery of each of the first regions is an ultrasonic
transducer unit characterized in that it is separated from each of the first to third transducers by
λ / 4 or more.
Here, λ is a wavelength of a transverse wave of the plate-like vibrating body generated by
applying ultrasonic vibration by each of the first to third vibrators.
[0009]
In one aspect of the present invention, the plate-like vibrator has a diaphragm and a weight, the
first to third vibrators are mounted on the diaphragm, and the weight is in the second region. The
thickness of the plate-like vibrating body located in the second region is set to the thickness of
the plate-like vibrating body located in the first to third first regions by being mounted on the
vibration plate located in It is also possible to make it thicker.
[0010]
In one aspect of the present invention, the weight may be a plate-like body joined on the
diaphragm located in the second region.
14-04-2019
3
[0011]
In one aspect of the present invention, the plate-like vibrating body has a vibrating plate, and the
first to third vibrators are mounted on the vibrating plate, and the first to third first to third
vibrators are mounted. The thickness of the plate-shaped vibrating body positioned in the second
region is formed to be thicker than the thickness of the plate-shaped vibrating body positioned in
the first region by shaving the diaphragm positioned in the region. It is also possible.
[0012]
In one aspect of the present invention, the plate-like vibrator has a vibration plate provided with
a hole or a groove, and the first to third vibrators are attached on the vibration plate, The groove
is engraved in the diaphragm located in the second area, so that the thickness of the plate-like
oscillator located in the second area is located in the first to third first areas. It is also possible to
make it thinner than the thickness of the vibrating body.
[0013]
One aspect of the present invention is an ultrasonic transducer unit for irradiating a cleaning
liquid in a cleaning tank with an ultrasonic wave, comprising: a plate-like vibrator; a vibration
surface formed on one surface of the plate-like vibrator; And three or more vibrators attached on
the other surface of the plate-like vibrator to apply ultrasonic vibration to the vibrating surface,
and the other surface of the plate-like vibrator has three or more first regions. And a second
region covering each of the first regions, wherein the thickness of the plate-shaped vibrator
positioned in the second region is thicker than the thickness of the plate-shaped vibrator
positioned in the first region Alternatively, each of the three or more vibrators is disposed in the
first region, and a distance between adjacent ones of the three or more vibrators is λ / 2 or
more. The outer periphery of is separated by λ / 4 or more from the vibrator arranged in the
first region. An ultrasonic transducer unit characterized by
However, said (lambda) is a wavelength of the transverse wave of the said plate-like vibrating
body which generate | occur | produces because ultrasonic vibration is added by each of the said
3 or more vibrator | oscillator.
[0014]
In one aspect of the present invention, the plate-like vibrator has a diaphragm and a plate-like
weight, the three or more vibrators are attached on the diaphragm, and the plate-like weight is
14-04-2019
4
By adhering on the diaphragm positioned in the second region, the thickness of the plate-shaped
vibrator positioned in the second region is the plate-shaped vibration positioned in the three or
more first regions It can also be made thicker than the thickness of the body.
[0015]
In one aspect of the present invention, the plate-like vibrating body has a vibrating plate, the
three or more vibrators are mounted on the vibrating plate, and the three or more vibrators are
positioned in the three or more first regions. The thickness of the plate-shaped vibrating body
located in the second region is formed to be thicker than the thickness of the plate-shaped
vibrating body located in the three or more first regions by cutting the diaphragm. It is also
possible.
[0016]
Further, in one aspect of the present invention, the plate-like vibrating body has a vibrating plate
provided with a groove, the three or more vibrators are attached on the vibrating plate, and the
groove is in the second region. The thickness of the plate-shaped vibrating body located in the
second region is thinner than the thickness of the plate-shaped vibrating body located in the
three or more first regions by engraving the diaphragm located in It is also possible.
[0017]
According to one aspect of the present invention, it is possible to provide an ultrasonic
transducer unit that makes the vibration mode of the vibration surface uniform and improves the
cleaning power.
[0018]
(A) is a top view which shows the ultrasonic transducer | vibrator unit based on 1 aspect of this
invention, (B) is sectional drawing in alignment with the 1B-1B 'line shown to (A).
(A) is a top view which shows the ultrasonic transducer | vibrator unit which concerns on 1
aspect of this invention, (B) is sectional drawing in alignment with a 2B-2B 'line shown to (A).
(A) is a top view which shows the ultrasonic transducer | vibrator unit which concerns on 1
aspect of this invention, (B) is sectional drawing in alignment with the 3B-3B 'line | wire shown to
14-04-2019
5
(A).
(A) is a top view which shows the ultrasonic transducer | vibrator unit based on 1 aspect of this
invention, (B) is sectional drawing in alignment with the 4B-4B 'line | wire shown to (A).
(A) is a top view which shows the ultrasonic transducer | vibrator unit based on 1 aspect of this
invention, (B) is sectional drawing in alignment with the 5B-5B 'line | wire shown to (A).
(A) is a figure which shows the sound pressure characteristic of the ultrasonic transducer unit
shown in FIG. 8 directly on the vibration surface, (B) is a figure which shows the sound pressure
characteristic of the ultrasonic transducer unit shown in FIG. is there.
(A) is a figure which shows the change of the admittance characteristic of the ultrasonic
transducer unit shown in FIG. 8, (B) is a figure which shows the change of the admittance
characteristic of the ultrasonic transducer unit shown in FIG.
(A) is a top view which shows the conventional ultrasonic transducer unit, B is sectional drawing
in alignment with 7B-7B 'shown to (A).
[0019]
Hereinafter, embodiments of the present invention will be described in detail with reference to
the drawings.
However, the present invention is not limited to the following description, and it can be easily
understood by those skilled in the art that various changes can be made in the form and details
without departing from the spirit of the present invention and the scope thereof. Therefore, the
present invention should not be construed as being limited to the description of the embodiments
below.
[0020]
First Embodiment FIG. 1 (A) is a plan view showing an ultrasonic transducer unit according to an
14-04-2019
6
aspect of the present invention, and FIG. 1 (B) is a 1B-1B ′ line shown in FIG. 1 (A). It is sectional
drawing which follows.
[0021]
The ultrasonic transducer unit applies ultrasonic waves to the cleaning liquid in the cleaning tank
(not shown) from the vibrating surface, for example, throws the ultrasonic transducer unit into
the cleaning tank, and the BL oscillator 2 is Ultrasonic vibration can be applied to the cleaning
liquid from the vibrating surface 1a by ultrasonic vibration.
Although the BL vibrator 2 is used in the present embodiment, another vibrator may be used, and
for example, a ferrite vibrator may be used.
[0022]
The ultrasonic transducer unit comprises a plate-like vibrator 10 and a plurality of BL vibrators
2. The plate-like vibrator 10 has a vibration plate 1 and first and second weights 5a and 5b. As
the diaphragm 1, for example, a diaphragm made of metal (for example, SUS, hastelloy, titanium
or the like) having a constant thickness can be used. A vibrating surface 1 a is formed on one
surface of the diaphragm 1, and a plurality of BL vibrators 2 are joined on the other surface of
the diaphragm 1. As a method of bonding the vibration plate 1 and the BL vibrator 2, for
example, bonding may be performed using an adhesive, or bonding may be performed using a
stat bolt and an adhesive or the like. The plurality of BL transducers 2 apply ultrasonic vibration
to the vibration surface 1a.
[0023]
As shown in FIG. 1A, the plurality of BL vibrators 2 have a triangular shape formed by connecting
the centers of three BL vibrators 2 adjacent to each other on the other surface of the diaphragm
1. The two adjacent BL vibrators 2 are arranged such that the distance between the two adjacent
BL vibrators 2 is λ / 2 or more. The thickness of the diaphragm 1 is preferably λ / 100 or less
of the longitudinal wave. However, with the stud bolt, it is possible to use the diaphragm 1
having a thickness of 2 mm to 10 mm or less in view of strength and erosion durability. λ is the
wavelength of the longitudinal wave of the diaphragm 1 generated by the application of the
14-04-2019
7
ultrasonic vibration by the BL vibrator 2.
[0024]
Each of the plurality of BL vibrators 2 is disposed on the first area 3 on the other surface of the
diaphragm 1, and the outer periphery of the first area 3 surrounds each of the plurality of BL
vibrators 2. The outer periphery of the first region 3 is separated by λ / 4 from the BL vibrator
2 disposed in the first region 3. In this embodiment, the plurality of BL transducers 2 are
arranged to form the above-described equilateral triangle, but the distance between two adjacent
BL transducers 2 is λ / 2 or more and the first region If the outer periphery of 3 is separated
from the BL vibrator 2 by λ / 4 or more, the arrangement of the plurality of BL vibrators 2 does
not necessarily have to be the above-described regular triangle. However, in order to arrange the
number of BL transducers 2 per unit area on the other surface of the diaphragm 1 as much as
possible, it is preferable to use the arrangement as shown in FIG. 1 (A).
[0025]
The other surface of the diaphragm 1 has a second region 4 covering each of the plurality of first
regions 3 and is located inside the triangle formed by the three BL transducers 2 described above
and in the second region 4 A first weight 5 a is provided on the other surface of the diaphragm 1.
The distance between the first weight 5a and each of the three BL vibrators 2 is preferably
substantially equal, and the first weight 5a is preferably installed at the center point of the three
BL vibrators 2.
[0026]
Further, as shown in FIG. 1A, a second region located at an equal distance from the two adjacent
BL vibrators 2 located at the end side of the diaphragm 1 and located at the end side of the
diaphragm 1 A second weight 5 b is provided at 4.
[0027]
The mass of each of the first and second weights 5 a and 5 b is preferably 1/150 or more of the
mass of the BL vibrator 2.
14-04-2019
8
Further, the height of each of the first and second weights 5a and 5b is a resonance length of 1/2
of the wavelength λ 'of the longitudinal vibration of the diaphragm 1 generated by the
application of the ultrasonic vibration by the BL vibrator 2 The height of each of the first and
second weights 5a and 5b is preferably a size other than near integer multiples of λ '/ 2. As a
result, resonance of each of the first and second weights 5a and 5b can be suppressed.
[0028]
Also, the shape of each of the first and second weights 5a and 5b may be a cylinder, a square, a
polygon, a cone, a trapezoidal shape, a stud bolt or a plate. In addition, the materials of the first
and second weights 5a and 5b may be metals such as stainless steel, titanium, titanium alloy,
aluminum, aluminum alloy, iron, copper, tantalum, etc. Ceramics, ferrite quartz, etc. may be used
if they can be bonded to the diaphragm 1.
[0029]
Further, welding is preferable for joining the first and second weights 5a and 5b to the
diaphragm 1, but bonding may be performed using an adhesive. Further, the corresponding
frequency of the BL vibrator 2 is preferably 300 kHz or less.
[0030]
According to the present embodiment, the first and second weights 5a and 5b are attached by
attaching the first and second weights 5a and 5b to the diaphragm 1 positioned in the second
region 4 as described above. The thickness of the plate-like vibrator 10 in the portion where it is
formed is formed to be thicker than the thickness of the plate-like vibrator 10 located in the first
region 3. For this reason, when the vibration from the BL vibrator 2 spreads in a circle on the
vibration surface 1a of the diaphragm 1, the vibration in a portion where the thickness of the
plate-like vibrator 10 differs by the first and second weights 5a and 5b. As a result, interference
with the vibration from the adjacent BL vibrator 2 can be suppressed, and the generation of a
complex vibration mode can be suppressed. In particular, vibrations from three directions by
three BL transducers 2 in a triangular arrangement interfere with each other to suppress the
generation of transverse vibrations of complex vibration modes, and as a result, concentration of
ultrasonic power to a specific BL transducer Can be suppressed, and the cleaning mode can be
14-04-2019
9
improved by making the vibration mode of the vibration surface 1a uniform.
[0031]
Further, the reason why the first and second weights 5a and 5b are not arranged in the first
region 3 is that the range of λ / 4 around the BL vibrator 2 is almost an ideal vibration, so the
vibration of this range is It is because it is preferable not to limit. Further, the reason why the
first and second weights 5a and 5b are arranged in the second region 4 is that vibration is
suppressed in the range exceeding λ / 4 in the periphery of the BL vibrator 2 by adding weights.
This is to reduce the mutual influence between the vibrators 2 and to bring the vibration mode of
the entire vibration surface closer to the ideal vibration.
[0032]
The effect of the first weight 5a is particularly remarkable, and the effect of the second weight 5b
is lower than that of the first weight 5a. The first and second weights 5a and 5b do not have to
be installed as shown in FIG. 1A, and may be installed, for example, only at a place where the
vibration mode of the vibration surface 1a is bad.
[0033]
Further, by making the vibration mode of the vibration surface 1a uniform, it is possible to
suppress the occurrence of erosion on the vibration surface 1a.
[0034]
In the present embodiment, the first and second weights 5a and 5b are mounted on the
diaphragm 1 positioned in the second region 4, and the thickness of the first and second weights
5a and 5b is the first region 3 Is formed thicker than the thickness of the vibrating body 1
located at a position of the diaphragm 1, but by providing a hole or a groove in the vibrating
plate 1 located in the second region 4, It is also possible to make the thickness thinner than the
thickness of the plate-like vibrator located in the first region 3.
This hole is a hole that does not go through the thickness of the diaphragm 1 and is processed by
14-04-2019
10
a counterbore method or the like. Even in such a case, the same effect as that of the present
embodiment can be obtained. The mass of the weight is preferably 1/150 or more of the BL
oscillator.
[0035]
Second Embodiment FIG. 2 (A) is a plan view showing an ultrasonic transducer unit according to
one aspect of the present invention, and FIG. 2 (B) is a 2B-2B ′ line shown in FIG. 2 (A). It is
sectional drawing which follows. In FIG. 2, the same parts as those in FIG.
[0036]
Each of the first and second weights 5 a and 5 b is screwed into a stud bolt 8 welded to the
diaphragm 1.
[0037]
Also in this embodiment, the same effect as that of the first embodiment can be obtained.
[0038]
Third Embodiment FIG. 3 (A) is a plan view showing an ultrasonic transducer unit according to
one aspect of the present invention, and FIG. 3 (B) is a 3B-3B ′ line shown in FIG. 3 (A). It is
sectional drawing which follows.
In FIG. 3, the same parts as in FIG. 1 are given the same reference numerals, and only different
parts will be described.
[0039]
The weight 5 c is a plate-like body adhered on the diaphragm 1 located in the second region 4,
and the thickness of the plate-like weight 5 c is 1/10 or more of the thickness of the vibration
plate 1 preferable.
14-04-2019
11
In detail, the plate-like vibrating body 10 has the diaphragm 1 and the plate-like weight 5 c, and
the plate-like weight 5 c is bonded or welded onto the vibration plate 1 positioned in the second
region 4. The thickness of the plate-like vibrator 10 located in the second region 4 is formed to
be thicker than the thickness of the plate-like vibrator 10 located in the first region 3.
[0040]
Also in this embodiment, the same effect as that of the first embodiment can be obtained.
[0041]
Fourth Embodiment FIG. 4A is a plan view showing an ultrasonic transducer unit according to
one embodiment of the present invention, and FIG. 4B is a 4B-4B ′ line shown in FIG. 4A. It is
sectional drawing which follows.
In FIG. 4, the same parts as in FIG. 1 are given the same reference numerals, and only different
parts will be described.
[0042]
The plate-like vibrator 10 has the diaphragm 1, and the plate-like vibrator 10 is positioned in the
second region 4 by scraping or digging the diaphragm 1 positioned in the plurality of first
regions 3. The thickness of 10 (that is, the thickness of the diaphragm 1) is formed thicker than
the thickness of the plate-like vibrator 10 located in the plurality of first regions 3.
[0043]
The thickness of the diaphragm 1 located in the second region 4 is preferably 1.1 or more times
the thickness of the diaphragm 1 located in the plurality of first regions 3.
[0044]
Also in this embodiment, the same effect as that of the first embodiment can be obtained.
[0045]
14-04-2019
12
Fifth Embodiment FIG. 5A is a plan view showing an ultrasonic transducer unit according to one
aspect of the present invention, and FIG. 5B is a 5B-5B ′ line shown in FIG. 5A. It is sectional
drawing which follows.
In FIG. 5, the same parts as in FIG. 1 are given the same reference numerals, and only different
parts will be described.
[0046]
The plate-like vibrator 10 has the vibration plate 1, and the groove 5 d is engraved on the
vibration plate 1 located outside the first region and at the boundary with the second region. The
thickness of the vibrating body 10 (that is, the thickness of the vibrating plate 1) is formed
thinner than the thickness of the plate vibrating body 10 located in the first region 3.
[0047]
The grooves 5d preferably have a depth of 0.5 mm or more and a width of 0.2 mm or more.
Various shapes can be used for the cross-sectional shape of the groove 5d. For example, a box
shape, a V shape, or a U shape may be used.
[0048]
Also in this embodiment, the same effect as that of the first embodiment can be obtained.
[0049]
FIG. 6A is a diagram showing sound pressure characteristics immediately above the vibrating
surface when the cleaning liquid is irradiated with ultrasonic waves from the vibrating surface by
ultrasonically vibrating the BL transducer of the ultrasonic transducer unit shown in FIG. FIG. 6B
shows the sound pressure characteristics immediately above the vibrating surface when the
cleaning liquid is irradiated with ultrasonic waves from the vibrating surface by ultrasonically
vibrating the BL transducer of the ultrasonic transducer unit shown in FIG. FIG.
[0050]
14-04-2019
13
The specifications of the ultrasonic transducer units in FIGS. 6A and 6B are 38 kHz and 600 W,
respectively, and the outer diameter is 320 mm × 220 mm, and 13 BL transducers are used.
The average sound pressure in FIG. 6 (A) is 573 mV, and the average sound pressure in FIG. 6 (B)
is 757 mV.
[0051]
According to FIGS. 6A and 6B, it can be seen that the sound field is clearly equalized and the
sound pressure is also increased directly above the vibration plane of the ultrasonic transducer
unit shown in FIG.
[0052]
FIG. 7 shows an example of improvement of the admittance characteristics of the 38 kHz
transducer, and FIG. 7 (A) shows the change in the admittance characteristics in which three BL
transducers of the ultrasonic transducer unit shown in FIG. It is a figure which shows the
measured result, FIG.7 (B) is a figure which shows the result of having measured the change of
the admittance characteristic which put three BL vibrator | oscillators of the ultrasonic
transducer unit shown in FIG. 1 together.
[0053]
The measurement conditions of the admittance characteristic of each of FIGS. 7A and 7B were
such that the frequency of the BL vibrator was 38 kHz using a 3 mm thick SUS 304 diaphragm.
[0054]
While the main resonance is dispersed as shown in FIG. 7A and the value of the resonance point
is lowered, the value of the resonance point is large and sharply rises in FIG. 7B. It can be seen
that the main resonance is in an ideal form, and the main resonance is greatly improved by
attaching a weight.
[0055]
1, 101 ... diaphragm 1a, 101a ... vibration surface 2, 102 ... BL vibrator 3 ... first region 4 ...
second region 5a ... first weight 5b ... second weight 5c ... plate-like weight 5d ... groove 8: Stat
bolt 10: Plate-shaped vibrator
14-04-2019
14
14-04-2019
15
Документ
Категория
Без категории
Просмотров
0
Размер файла
24 Кб
Теги
description, jp2012125743
1/--страниц
Пожаловаться на содержимое документа