close

Вход

Забыли?

вход по аккаунту

?

JPS63236577

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 JPS63236577
[0001]
The present invention relates to a wave matching method of an ultrasonic transducer applied to
an ultrasonic motor, B acoustic wave processing, an atomizer, and the like. <Prior Art> A torsional
vibration element that generates strain vibration of opposite phase in the circumferential
direction and a longitudinal vibration element that generates strain vibration in the thickness
direction are stacked, metal blocks are disposed on the front and rear surfaces thereof, and these
are Those integrally connected are known as disclosed in JP-A-81-120877. In this device, the
torsional vibration element causes rotation along with the torsional vibration and linear
reciprocation in the axial direction by the longitudinal vibration element on the end surface, and
an elliptical motion due to the combination is generated at the end surface. Purpose. By the way,
in such a configuration, the speed of sound of the transverse wave (torsion vibration wave) is
slower than that of the longitudinal wave, and there is only about 61 degrees. Specifically, with
respect to the vertical wave of 5000 m / s, the transverse wave is It is about 3000 +++ / s. For
this reason, it is necessary to match the resonant frequency of the longitudinal vibration and the
resonant frequency of the torsional vibration in order to extract the desired elliptical drive to the
end face, and furthermore, since the vibration modes are different from each other, the metal
blocks before and after However, with the normal shape of the same diameter, it is not possible
to actually take out the elliptical motion, and it is too much to suggest on the desk. An object of
the present invention is to provide a wave matching method of a Hi sound transducer that
enables manufacturing of an ultrasonic transducer having such a structure by matching a
longitudinal vibration wave and a torsional vibration wave. In the present invention, a torsional
vibration element that generates strain vibration of opposite phase in the circumferential
direction and a longitudinal vibration element that generates strain vibration in the thickness
direction are stacked and disposed on the front and rear surfaces thereof In which each vibrating
element is held by metal pros. The cross-sectional area of the metal block is changed to adjust
04-05-2019
1
the torsional vibration wave, and the longitudinal vibration wave is adjusted by setting the total
length to match the torsional vibration wave and the longitudinal vibration wave. Effect> The
inventor of the present invention has conducted various studies and experiments on the vibrator
having such a structure. As a result, the longitudinal vibration wave is much more susceptible to
the shadow τ of the entire length of the vibrator than the torsional vibration wave is Since the
influence by the rotational inertia force is large, the characteristic of being largely changed by
the change of the cross sectional area was found. The present invention adjusts the total length
and the cross-sectional area using these characteristics to make the apparent rf speed of the
longitudinal vibration wave and the torsional vibration wave the same and to set the resonance
frequency of the vibration mode corresponding to each vibration wave. It was made to match. It
is difficult for mass production to match the resonance frequency of each mode of longitudinal
vibration and torsional vibration with certainty. Therefore, even if there is a variation of about ±
10%, preferably ± 5%, there is no report.
In addition, when the longitudinal vibration wave is half-wave resonant (first-order mode), the
torsional vibration wave has one-wave resonant (second-order mode) and the longitudinal
vibration wave has one-wavelength resonance (longitudinal vibration wave). In the case of the
second order mode, the torsional vibration wave has a combination of 1.5 wavelength resonance
(third order mode). Besides, there is also a combination of longitudinal vibration waves in the
third mode and torsional vibration waves in the fifth mode. That is, the total length and the crosssectional area may be determined based on the combination of the vibration modes. An
embodiment of the present invention will be described with reference to the attached drawings.
Referring to FIG. 1, reference numerals 2a and 2b denote torsional vibration elements composed
of two annular piezoelectric elements made of PZT or the like which are circumferentially
polarized and generate circumferentially opposite strain vibration in opposite phases, The group
vibration elements 3a and 3b formed of two annular piezoelectric elements whose thickness
polarization directions are different from each other are stacked. The metal blocks 4 and 5 made
of duralumin are disposed on both sides of the laminate, and bolts 6 are inserted into the centers
of the respective members, and screws 6a and 6b at the upper and lower ends thereof are
attached to the inner surface of the metal block 5 at the rear. The vibrating element 2a, 2b, 3a,
3b is held between the metal block 4.5 by screwing around the screw provided circumferentially
and the nut 7 arranged at the front end of the metal block 4, and the ultrasonic vibrator l is
configured with a scissors. Do. In this configuration, the metal block 4 forms the reduced
diameter portion 10 by connecting its front portion to the small diameter portion 9 via the
tapered surface 8, and the nat 7 has the same diameter as the small diameter portion 9. I assume.
Thus, the length of the metal block 4.5 is determined to determine the total length thereof, and
the diameter of the diameter-reduced portion 10 of the metal block 4 is determined to adjust the
cross-sectional area. By this adjustment, as shown in FIG. 1, when the longitudinal vibration wave
by the drive of the longitudinal vibration elements 3a and 3b is at the wave-wavelength
resonance (primary mode), the torsional vibration wave by the drive of the torsional vibration
04-05-2019
2
elements 2a and 2b Is set to be 11 long resonance (secondary mode). Besides this, it is also
possible to realize a combination of various modes as described above. The metal block 4 also
acts as a horn due to the diameter-reduced portion 10, and as shown by the velocity distribution
waveform, a large amplitude is generated at the front end relative to the rear end of the metal
block 5. In this configuration, when an alternating voltage of a predetermined frequency is
applied to the torsional vibration elements 2a and 2b and the longitudinal vibration elements 3a
and 3b according to the above-mentioned relationship, the rotational motion and longitudinal
vibration associated with the torsional vibration at the tip of the metal block 4 Motion that
combined the reciprocation linear motion accompanied by occurs. And if the amplitude of the
torsional vibration and the longitudinal vibration is the same and the phase is the same, circular
motion is performed, and if the amplitude and the phase are changed, the elliptical interlocking is
performed.
Furthermore, the rotation can be reversed. Next, FIG. 2 shows another means for adjusting the
cross-sectional area, in which the neck portion 20 is formed by reducing the diameter of the
metal block 4 in the middle thereof. そしてこの! The cross-sectional area of the metal block 4 is
adjusted by selecting the diameter of the Iii neck portion 20. Further, FIG. 3 shows a metal pro
metal 4, 5 of the same diameter in which a screw hole is formed at the center, in which the bolt
30 is screwed into the screw hole and the vibrating elements 2a, 2b, 3a, 3b are held. The bolt 30
is shortened, thereby forming the adjustment hole 31 using the screw hole of the metal block 4.
Then, the cross-sectional area of the metal block 4 is reduced by the adjustment holes 31, and
the adjustment can be performed. <Effects of the Invention> As described above, according to the
present invention, the cross-sectional area of the metal block is changed to adjust the torsional
vibration wave, and the longitudinal vibration wave is adjusted by setting the total length,
thereby the torsional vibration wave and the longitudinal vibration wave. The match was made,
and from the end, it is key 1 yen El! There is an excellent effect that can be taken out effectively.
[0002]
Brief description of the drawings
[0003]
The attached drawings show an embodiment of the present invention, and FIG. 1 is a side view of
the lower half of the ultrasonic transducer 1 showing an embodiment of the cross-sectional area
adjusting means of the block. The velocity distribution waveform is described along the axial
direction.
04-05-2019
3
2 is a side view of the second embodiment, and FIG. 3 is a side view of the lower half of the third
embodiment taken longitudinally. ultrasonic vibrator 2a, 2b; torsional vibration element 3a, 3b;
longitudinal vibration element 4, 5; metal block 10; Neck reduction 31. Adjustment hole
applicant Suguru Special Ceramics Co., Ltd. Kami Hanyu Yuki Kurosawa Sawa Attorney Attorney
Matsuura excessive force "1 Figure 1 Figure 2
04-05-2019
4
Документ
Категория
Без категории
Просмотров
0
Размер файла
12 Кб
Теги
jps63236577
1/--страниц
Пожаловаться на содержимое документа