close

Вход

Забыли?

вход по аккаунту

?

JPS62247774

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 JPS62247774
[0001]
FIELD OF THE INVENTION The present invention relates to a method of generating electric
power by ultrasonic vibration in which 5 L rotational energy is converted to electric energy by an
ultrasonic resonator 1-7. 2. Related Art Conventionally, there is an electromagnetic conversion
system as a power generation system that extracts rotational energy as electric energy. This is to
take out the electromotive force generated in the wire moving in the magnetic field in the
direction of the right angle jj, and the rotor provided with the windings in the magnetic field
created by the field coil and the permanent magnet)). It is rotated at 1 '' by the rotational energy,
and the power generated in the winding is used through the armature 1000. Problems to be
solved by the invention In the case of such an electromagnetic conversion system, it is necessary
to increase the magnetic field and increase the magnetic flux density in order to increase the
power generation efficiency or to miniaturize and miniaturize the power generation apparatus. is
there. However, for example, if a magnetic material having a high magnetic flux density, such as
samarium or cobalt, is used to strengthen the magnetic field, such a magnetic material becomes
very expensive. Further, due to the weight of the magnetic material and the winding and the
complexity of the volume or structure -4-, there is a limit to the reduction in size and weight.
Therefore, the present invention has been made in view of such a point, and an object of the
present invention is to provide a power generation method by ultrasonic vibration that can
generate power with high efficiency under a small and lightweight structure. Means for Solving
the Problems The present invention comprises an axially-driven electro-mechanical conversion
unit, and a mechanical-electrical conversion unit for converting mechanical energy by vibration
perpendicular to the shaft or in a torsional direction to electrical energy. The ultrasonic resonator
is made to be axially vibrated by the electro-mechanical conversion unit, using an ultrasonic
resonator in which the axial resonance frequency of the electro-mechanical conversion unit and
the resonance frequency orthogonal or torsional to the axis of the mechanical-electrical
04-05-2019
1
conversion unit are matched. The end face of the resonator is pressed against the rotating rotor.
When the operating ultrasonic resonator is moved by 1 h in the direction of the axis lj and
pressed by the rotating body, the BH 1 ′ ′ f wave resonator performs torsional vibration
operation by receiving a shadow 67 ′ of rotational force 3 Since the resonance frequency of the
wave resonator is the same as that of the axial direction and the direction perpendicular to the
axis or in the direction of torsion, resonance is also performed in the direction perpendicular to
the axis or the direction of torsion in synchronization with the axial vibration. Generate vibration.
However, the stress due to the resonance vibration is converted into electric power by extracting
it as electric energy by the mechanical-electrical conversion unit. The first embodiment of the
present invention will be described with reference to FIGS. First, the excess used in the present
embodiment)? The wave resonator uses one which has already been proposed by the present
applicant and is disclosed in Japanese Patent Application Laid-Open No. 14128482, and its
structure will be described with reference to FIGS. 2 and 3.
First, a torsional vibration T-1 is provided which generates torsional vibration in an axial
direction. The second torsional vibrator 1 is provided with electrostrictive elements 3 and 4 for
generating torsional vibration on both surfaces of the driving electrode plate 2, and further, a
vibrating body made of a metal member in which female screws 5a and 6a are formed on each
axis. 5, 6 are fastened by bolts 7 having male screws 7a at both ends. Then, the electrostrictive
element 3.4, the disc-shaped resonator 8 resonating in the radial direction and the
electrostrictive elements 9 and 10 for driving the electrostrictive element 3.4 are interposed
between the vibrators 5 and 6, and integrated integrally with the bolt 7 Fasten to Further, a
driving electrode plate 11 is provided between the electrostrictive elements 9.degree. In addition,
a common electrode plate 12 is provided between the electrostrictive element 10 and the diskshaped resonator 8. Furthermore, an insulating pipe 13 is provided between the inner
circumference of the central hole of each of the electrostrictive elements 3, 4, 9, 10 and the outer
circumference of the bolt 7. Thus, the ultrasonic resonator 14 is formed. Here, the disc-shaped
resonator 8 that resonates in the radial direction by the electrostrictive elements 9 and 10 is
located at the node portion of the torsional vibrator 1 and is perpendicular to the axis. That is,
the vibrators 5 and 6 are integrated with the electrostrictive elements 3 and 4, the discoid
resonator 8 and the electrostrictive element 9.10 coaxially attached to the 1- The axial length is
set so that the screw 11 resonates and vibrates at the same frequency as the radial resonant
frequency 8. In such a configuration, if the electrode plate 11 is connected to the drive power
supply 15 and the frequency thereof is the radial direction resonant frequency of the disk-shaped
resonator 8, the disk-shaped resonator 8 resonates and vibrates. The displacement distribution
and stress distribution at this time are, as shown in FIG. 4, a disk-like shape (the maximum
amplitude on the circumference of the oscillator 8 and the maximum stress on the axis -L).
Accordingly, Poisson's phenomenon also generates vibration in the axial direction to produce the
maximum amplitude in the axial direction on both end surfaces of the vibrators 5 and 6. Here,
such vibration in the axial direction is generated not by resonant vibration in the axial length but
04-05-2019
2
by radial resonance of the disc-shaped resonator 8, but it is also apparent in the axial direction at
that frequency. It exhibits two resonance characteristics, and can be viewed as an axial resonance
in operation. Therefore, when the axial end face of the torsional vibration-fl, that is, the end face
of the vibrating member 6 is pressed against the end face of the rotating member 16 as shown in
FIG. By the axial resonance vibration, the contact / separation operation approximately every half
cycle at the resonance frequency is repeated with the end face 16 a of the rotating body 16. At
this time, since the rotating body 16 is rotating in a direction shown by the arrow 17 in FIG. 1,
the end face of the vibrating body 6 is in the half cycle in contact with the end face 1.6a of the
rotating body 16 Is twisted in the rotational direction, and in the half cycle drawn from the end
face 16a of the rotary body 16, a torsional vibration operation is performed such that the
reaction is unscrewed in the opposite direction to the rotational direction.
Such a torsional vibration is a resonant vibration because the torsional resonant frequency is
provided identical to the axial resonant frequency (that is, the radial resonant frequency of the
disc-shaped resonator 8), and an electrostrictive element for torsional vibration. Stress 3 and 4.
Therefore, according to the piezoelectric effect of the electrostrictive elements 3 and 4, the
alternating voltage proportional to the rotational speed of the rotating body l [3 is synchronized
with the frequency of the 151.times. Occur. Therefore, if an electrical load 18 is connected
between the plate 2 and the common terminal 12, electrical energy can be extracted to the load
18. By the way, the driving power for oscillating in the axial direction is energy for obtaining the
frictional force necessary for torque transfer between the end face 16 a of the rotating body 16
and the end face of the vibrating body 6 in approximately a half cycle. The energy is converted
into torsional vibration energy and there is only 11 (compared to the energy taken out). That is,
in the present embodiment, an electro-mechanical conversion unit that generates axial vibration
centering on the disk-shaped resonator 8 and the electrostrictive elements 9 and 10 is
configured. , 6 are constructed as an electromechanically reversible mechanical-electrical
conversion unit. Subsequently, a second embodiment of the present invention will be described
with reference to FIG. In the first embodiment, the apparent axial resonance is obtained by the
radial resonance of the disk-shaped resonator 8 and the resonance frequency of the torsional
vibration is made to coincide with that by utilizing the fact that the axial resonance can be
obtained in the upper direction. In the present embodiment, an ultrasonic resonator 20 is used in
which a torsional vibrator which is usually used and a vertical vibrator which is axially resonated
are integrally fastened to each other so as to match the respective resonance frequencies. It is. In
FIG. 5, an annular electrostrictive element 21.22 for axial driving and an annular electrostrictive
element 23.24 for torsional driving are provided. Here, the electrostrictive elements 2] and 22
are polarized in the thickness direction and apply an electric field in the thickness direction to
generate stretching vibration in the thickness direction. Further, the annular electrostrictive
element 23.24 is polarized in the circumferential direction, and when an electric field is applied
in the thickness direction, socking vibration, that is, torsional vibration is generated in the
circumferential direction. These electrostrictive elements 21 to 24 are electro-mechanically
04-05-2019
3
reversible, and generate mechanical strain by application of frost and also generate voltage when
mechanical strain is applied. An electrode plate 25.26.27 is interposed between the
electrostrictive elements 21 to 24, and a common electrode plate 29 is interposed between the
electrostrictive element 21 and the metal member 28.
The tip end side of the metal member 28 is formed into an irregular shape by the parallel notch
portion 30 via the R-shaped step portion, and the tip end is an output end face 31. Further, the
gold IA member 28 is integrally fastened by bolts or the like around the electrostrictive elements
21 to 24 together with the metal portion 32 of the other H. Here, the parallel notch 30 is formed
as a shape for matching the torsional resonance frequency and the axial resonance frequency in
the integrated ultrasonic resonator 20. In the ultrasonic resonator 20, the electrode plate 26 and
the common electrode plate 29 are commonly connected to the common terminal of the drive
power supply, and the hot terminal of the drive power supply is connected to the electrode plate
-10 = 25. Then, when the frequency of the drive power supply is adjusted to the axial resonant
frequency, the output end face 31 resonates in the axial direction. Therefore, when the end 31 of
the ultrasonic resonator 20 such as the two is aligned with the axial center of the end face of the
rotating body rotating as in the case of FIG. 1 and pressed, a torsional vibration synchronized
with the axial vibration Can be generated, and electric energy can be taken out from the
electrode plate 27. −) In the present embodiment, the electro-mechanical conversion unit is
configured around the electrostriction coefficient 7-21.22, and the mechanical-electrical
conversion unit) is configured around the electrostrictive element 23 ° 24. . The second
embodiment of the present invention will be described with reference to FIGS. In the first and
second embodiments described above, the electrostriction factor f−, which is a conversion unit
for axial vibration and torsional vibration, is separately provided, but in the present embodiment,
axial vibration and torsional direction are provided. The ultrasonic resonator 35 is used which
has both the conversion function with the vibration. First, the electrostriction factor r for the
second ultrasonic resonator 35 is divided into four fan-shaped portions having a central hole as
shown in FIG. 7 so as to be small in FIG. 3 are used, and their electrostriction factor f 1, i [i is 1 ′
′, polarized in the I direction. Then, two pieces of '1t x j element /-36 are prepared, and an
electrode plate 37 having the same shape as the electrostrictive element 36 is interposed with an
end t between the two electrostrictive elements V'-36 The first metal fll (material 31) in which
two grooves 38 are formed in the axial direction at right angles to one of the two surfaces from
the both surfaces, and the end portion is left. The second metal portion 441 441 formed in the
axial direction with the two grooves 40 corresponding to the grooves 38, is externally fastened
by a fastening tool such as a center bolt. The tip of one parallel cut-out portion 42 of the first
metal portion vJ ′ 39 serves as an output end surface 43. 44 for Friday) tA iW 4A ”i!
It is a common terminal attached to 1. In such a configuration, first, the electrode plates 37 are
connected in parallel and M is applied to the common terminal 44 to apply an AC voltage, and
04-05-2019
4
when the frequency is adjusted to the axial direction (the vibration frequency, this ultrasonic
resonator 35 Resonating in the axial direction, the end face 43 resonates in the axial direction
with maximum displacement. Next, the electrode plates 37 are diagonally connected, and
alternating current voltages of opposite phases are applied to the common terminal 44, and the
frequency is adjusted to the torsional resonance frequency, and the ultrasonic resonator 35 is
twisted in the torsional direction. Resonate, and both end portions in the radial direction of the
end face 43 resonate and vibrate at the maximum displacement. This is because the metal parts
方向 39.41 are flexurally vibrated and torsional vibration is generated at the end portions 43
because the expansion and contraction direction is reversed every adjacent circumferential
direction of the electrostriction coefficient 7-36. Here, the parallel notch portion 42 having a
deformed shape in an axial cross section of the metal member 39, for example, has an axial
vibration amplitude and a torsional vibration amplitude as well as an axial resonance frequency
and a twist. It is determined to match the resonant frequency of the direction. Also, the grooves
38.40 formed in the metal member 39.41 are useful for releasing harmful stress during flexural
vibration. Such ultrasonic waves J (excitation body: 35) are connected to a table for converting
rotational energy of a rotating body into electrical energy as shown in FIG. 8, for example. First,
the common terminal 44 is connected to the ground side end of the drive power supply 45 and
grounded. The electrode plates 37 are connected in parallel every other adjacent (i.e., diagonally),
and are connected to both ends 48 and 49 of the primary coil 47 of the transformer 46
respectively. The drive power source 45 is connected to the middle point (center tap) 5Q of the
next coil 47. In fact, an electrical load 52 is connected to both ends of the secondary coil 5 of the
transformer 46. In such a connection, when the drive power source 450 frequency is adjusted to
the axial resonance frequency, the end face 43 of the ultrasonic resonator 35 resonates in the
axial direction. The amplitude of this resonant vibration is, for example, 10 μm peak to peak.
Therefore, when the end face 43 is pressed against the end face of the rotating rotating body
with its axis centered, a voltage having a phase reversal is generated for each adjacent electrode
plate 37 by the piezoelectric effect, and the secondary of the transformer 46 is generated.
Electrical energy is supplied to the electrical load 52 connected to the coil 51 (C (supply). Thus,
the conversion unit () in the ultrasonic resonator 35 of the present embodiment has a function of
converting both the axial direction and the twisting direction by one type of electrostrictive
element 36.
That is, in the present embodiment, the electrostrictive element 36 is a unit as an electromechanical conversion unit or an electro-mechanical conversion unit. Further, a fourth
embodiment of the present invention will be described with reference to FIGS. In the first to E
embodiments described above, the stress due to the torsional vibration is taken out as the electric
power by the mechanical-electrical conversion unit, but in the present embodiment, the energy
due to the flexural vibration in the direction perpendicular to the axis is used as the electric
power. It is made to convert. Therefore, first, the structure of the ultrasonic resonator 55 of the
present embodiment will be described. As shown in FIG. 10, the element j is divided into two in a
04-05-2019
5
l'l'l shape and an annular electrostrictive element f-56 having a central hole is used, and these
electrostrictive elements 56 are formed in the thickness direction It is polarized. Then, two such
electrostrictive elements 56 are prepared as shown in FIG. 9, and the same shape is formed
between the two types of strain elements 56, and the electrode plates 57 having the terminals
are overlapped to face each other. The first metal portion 4] in the form of an exponential step
and the second metal member 5 '9 are clamped from the both surfaces and integrally fastened by
a central holt or the like. In the two, between the gold Jii X portion + 4 '59 and the
electrostrictive element r56 "(a conductive lateral girder 60 is interposed (one. With such an
ultra r) wave resonator 55, to the common electrode plate 60) 1)! When an alternating voltage
whose frequency is adjusted to the axial resonant frequency is applied to the +. + .. lambda. And
the end face 61 of the metal part 58 (1) vibrates in the axial direction with maximum
displacement. Next, when an AC voltage of reverse phase is applied to each of the electrode
plates 57 with respect to the common electrode plate 60 and the frequency thereof is adjusted to
the flexural resonance frequency, the electrostrictive elements 56 expand and contract in
opposite directions centering on their dividing lines Do exercise. Accordingly, the ultrasonic
resonator 55 is in flexural resonance, and the end face 61 resonates with maximum amplitude in
the direction orthogonal to the dividing line of the electrostrictive element 56 as shown by the
arrow 62. Here, the cross-sectional shape of the metal member 58 in the step-like shape enlarges
the amplitude of the axial vibration and the amplitude of the flexural vibration, and makes the
resonance frequencies of the axial direction and the flexural direction coincide with each other.
As determined. In the case of converting the rotational energy of the rotating body into electrical
energy using such an ultrasonic resonator 55, for example, wire connection is made as shown in
FIG. First, the common electrode plate 60 is connected to the ground side end of the drive power
supply 63 and grounded.
The electrode plates 5 and 17-7 are respectively connected to the next coils (both ends 66. 67 of
the transformer B4). Further, the driving power supply 63 is connected to the middle point 68 of
the next coil 65. Furthermore, an electrical load 70 is connected to both ends of the secondary
coil 69 of the l lance 64. In such a connection, when the frequency of the drive power supply 63
is adjusted to the axial resonance frequency, the end face 61 vibrates in the axial direction. At
this time, when such an end face 61 is pressed against the end face 72a of the rotating body 72
rotating in the direction of the arrow 71 as shown in FIG. Generates a voltage whose phase is
inverted. Therefore, power is supplied to the electrical load 70 connected to the secondary coil
69 of the transformer 64 by λ). Further, as shown in FIG. 13, the end face 61 can be pressed
against the circumferential surface 721) of the rotating body 72, and electric power can be taken
out from the rotational energy. In the present embodiment, the axial drive source has been
described as a constant voltage source, but the same applies to a constant current drive method.
Moreover, it is the same that constant current output can be obtained also about output power.
According to the present invention, the axial direction of the electro-mechanical conversion unit
is obtained by using the ultrasonic resonator in which the resonant frequency in the axial
04-05-2019
6
direction and the resonant frequency in the orthogonal direction or the torsional direction are
matched as described above. By pressing the rotating end face that is resonantly vibrated to the
rotating body to generate resonant vibration in the direction perpendicular to the axis
synchronized with the axial vibration or in the twisting direction, and mechanical energy from
this vibration is mechanically-electrically converted. Since the unit extracts electric energy as
electric energy, the high energy density of the ultrasonic resonator can be effectively used and
the power generation mechanism without moving parts can be simply configured as compared
with the conventional electromagnetic conversion method etc. Thus, a compact, lightweight and
highly efficient power generation system can be obtained.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a perspective view of a first embodiment of the present invention, FIG. 2 is a crosssectional view of the ultrasonic resonator, FIG. 3 is a perspective view, and FIG. FIG. 5 is a
perspective view of an ultrasonic resonator showing a second embodiment of the present
invention, and FIG. 6 is a perspective view of an ultrasonic resonator showing a second
embodiment of the present invention, FIG. The figure is a perspective view of the electrostrictive
element, FIG. 8 is a connection diagram, and FIG. 9 is a fourth example of the present invention.
(A perspective view of an oscillator, FIG. 10 is a perspective view of the electrostrictive element,
FIG. 11 is a connection diagram, FIG. 12 is a perspective view, and FIG. 13 is a perspective view.
14 ultrasonic resonator 16 rotating body 20 ultrasonic resonator 31 end surface 35 ultrasonic J
(excitation body 43 end surface 55 super wave) '9 wave Resonant body, 61 · · · end face, 72 · ·
rotating body 1 ■ ■ 17 E,! 5a 7al J3q "ZZ,%, 3 Figure 6 m7aJ J S Ju". Ju figure 1, 1 JZ6 Lou L'1
L25 direction 16 ,. ,,%, IZ seven ha
04-05-2019
7
Документ
Категория
Без категории
Просмотров
0
Размер файла
19 Кб
Теги
jps62247774
1/--страниц
Пожаловаться на содержимое документа