JPS5832772Y2 - vibration amplifier - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vibration amplifier having a horn that amplifies vibrations caused by an ultrasonic vibrator, and the atomization surface of the vibration amplification horn is configured to be larger than the tip of the vibration amplification horn. By increasing the amount of atomization and further providing a ventilation guide such as a notch on the atomization surface, the atomization surface diffuses and rectifies the atomized liquid, that is, the atomized particles, and the atomization The purpose is to promote mixing of particles and air.

The vibrations generated by the ultrasonic vibrator are very small, and when a liquid is atomized using these vibrations, a vibration amplification horn is required to amplify the vibrations to a certain extent.

There are various types of vibration amplification horns, such as conical type, exponential type, and step type.The vibration magnification factor of each type is the ratio of the amplitude of both end faces for a conical type horn, and the ratio of the amplitude of both end faces for an exponential type horn. is the diameter ratio of both end faces with a circular cross section.

Further, in the case of a step-shaped horn, it is the area ratio of both end faces, and in the case of a horn with a circular cross section, it is the square ratio of the diameters of both end faces, and both have a tapered shape.

In other words, the smaller the tip of the vibration amplifying horn is compared to the other end, the greater the vibration (i.e.,
The amount of atomization depends on the area of the small end surface)
.

If the configuration is such that the vibration is increased, the area of the small end face is reduced, and the amount of atomization is inevitably reduced.

Therefore, when it is necessary to increase the amount of atomization, the area of the small end face is increased.

That is, the area ratio of both end faces may be made small.

It would be more preferable if both the atomization amount and the vibration were large, but if both were attempted to be large, the structure of the horn would have to be large, and the vibrator would also have to be large.

In addition, the density of the atomized particles near the tip of the vibration amplification horn is very high, and the mixture with the air is poor, so when this device is applied to a combustion device, it is difficult to ignite, and the atomized particles are scattered irregularly. Due to the scattering, flame destabilization phenomena such as flying sparks and pulsation occur during combustion, resulting in high combustion noise.

The present invention solves the above-mentioned problems, and this embodiment shows a case in which it is applied to a liquid fuel combustor.As explained below with reference to the drawings, 1 is a wind barrel having a blower connection port 2 at the rear end; An outer blower tube 3 with an open front end is fixed to the front end of this wind barrel.

Reference numeral 4 denotes an ultrasonic vibrator, and a vibration amplification horn 5 is fixed to the upper end of the ultrasonic vibrator. It is housed inside the outer blower tube 3.

Reference numeral 8 denotes an atomizing section constructed at the tip of the vibration amplifying horn 5, and has an atomizing surface 10 with an air guide section 9 formed on the front surface.

The air blow guide section 9 is formed by cutting out the atomizing section 8 in a circular manner from the edge thereof toward the center, and its depth becomes shallower toward the center.

Reference numeral 11 denotes an oil amount regulator, which is connected via an oil supply pipe 12 to an oil supply path 13 formed in the center shaft of the vibration amplifying horn 5, and furthermore, the oil supply path 13 is connected to the atomization surface with an oil supply port 14. It opens at 10.

Reference numeral 15 denotes an inner blower tube located in front of the vibration amplification horn 5 and equipped with an inner air agitator 16 made of a large number of spiral blades. Between the inner blower tube 15 and the outer blower tube 3,
An outer air disturbance body 17 having the same shape as the inner air disturbance body is provided.

Reference numeral 18 denotes an ultrasonic oscillator configured by energizing the ultrasonic transducer 4 via a conductive wire 19.

Reference numeral 20 denotes a spark plug, which passes through the outer air disturbance body 17 and is energized by an ignition transformer 21.

Next, from an operational point of view, the fuel whose oil amount has been adjusted by the oil amount regulator 11 is transferred to the oil supply pipe 12. Oil supply path 13. Oil supply port 1
4 and the atomization surface 1 configured at the tip of the vibration amplification horn 5.
0, and an oil film is formed on this surface due to surface tension.
This oil film becomes atomized particles under the influence of ultrasonic vibration.

However, since these atomized particles have a small kinetic energy, unlike conventional hydraulic atomized fuel combustion devices, they do not have a constant atomization pattern, and the fuel near the front end of the vibration amplification horn 5, which is the ignition region, is The concentration becomes extremely high.

Therefore, in order to properly mix the atomized particles with the combustion air, an inner air disturbance body 16 and an outer air disturbance body 17 having a plurality of spiral blades are provided around the front end of the vibration amplification horn 5. This causes complete combustion.

However, the disturbance caused by the inner and outer air disturbance bodies 16 and 17 is not sufficiently effective in the vicinity of the front end of the vibration amplification horn 5, and as a result, the air blowing speed by the inner air disturbance body 16 and the atomization surface 10 are The unbalance with the atomization speed causes flame instability such as flying sparks and pulsation, which makes it difficult to ignite, especially at the time of ignition.

Therefore, especially in the above embodiment, the air blow guide section 9 is connected to the atomization surface 1.
By setting it at 0, swirling air is sent to the ignition area to create negative pressure in the ignition area to prevent flying sparks and to sufficiently agitate the atomized particles, which solves the above problems. It was done.

As described above, in the present invention, an atomization surface larger than the tip surface is formed at the tip of the vibration amplification horn, so the amount of atomization on this atomization surface is extremely large.

However, if the amount of atomization increases in this way, incomplete combustion may occur or destabilizing phenomena such as flying sparks and pulsation may occur unless an appropriate amount of combustion air is mixed.

For this reason, in the present invention, a blow guide section is provided on the atomization surface toward the inner circumference, and by providing this blow guide section, sufficient combustion air can be supplied to the atomized particle group while swirling. As a result, incomplete combustion and unstable combustion can be prevented.

In particular, this embodiment has been described with respect to a combustion device, but it can also be applied to humidification and the like.

Further, the atomizing part at the tip of the vibration amplifying horn may be integrally molded or a combination thereof, and the blowing guide part does not have to be a cut groove and may be something like an air agitator.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the vibration amplifier of the present invention, FIG. 2 is a main perspective view of the vibration amplifier of the present invention, and FIG. 3 is a front view thereof. 4... Ultrasonic vibrator, 5... Vibration amplification horn, 9... Air blow guide section, 10...
Atomization surface.

Claims (1)

[Scope of utility model registration request] A vibration amplifying horn that amplifies vibrations caused by an ultrasonic vibrator has an atomizing surface larger than the tip surface at the tip thereof, and a blowing guide section is provided on the atomizing surface so as to blow air in an inner circumferential direction. A vibration amplifier that gives kinetic energy to the atomized liquid that is supplied to the atomization surface.