JPS62129172A - Ultrasonic atomizing apparatus - Google Patents

Abstract

PURPOSE:To enable stable fine pulverization even at the time of large amount flow, in the edge part of a vibrator, by providing a recessed part to a leading end part and forming stepped projections to the inner and outer peripheral part of said recessed part and communicating said projections with a liquid supply port. CONSTITUTION:For example, in the case of the fuel nozzle 1 for a gas turbine, plural steps of annular mountain shaped projections 26A having the same diameter are provided to the outer periphery of the leading end of a vibrator 10. A recessed part 30 is formed to the leading end part of the vibrator 10 and plural steps of annular mountain shaped projections 26B having the same diameter are also provided to the inner peripheral part of the recessed part 30 and an edge part 26 is formed of both projections. Further, the outer peripheral stepped projections 26A and the inner peripheral stepped projections 26B are communicated with one or more of liquid supply ports 32. Therefore, when a liquid is supplied to the vibrator 10 from a nozzle orifice 6, said liquid is sprayed in a finely pulverized state by the outer peripheral projections 26A and also supplied to the inner peripheral stepped projections 26B through the liquid supply ports 32 to be finely pulverized.

Description

Detailed Description of the Invention: r-1-1-1) Particularly (1) automotive fuel injection devices, such as electronically controlled gasoline injection valves or electronically controlled diesel injection valves;
(2) Fuel nozzles for gas turbines, (3) Burners for industrial, commercial, and domestic boilers, heating furnaces, and heaters, (
4) Industrial liquid sprayers, such as drying sprayers for drying liquids such as foods, pharmaceuticals, agricultural chemicals, fertilizers, temperature control,
Suitable for use in humidity control sprays, baked powder sprayers (ceramic granulation), spray coating equipment, reaction accelerators, and (5) non-industrial liquid sprayers, such as agricultural chemical sprayers, 1N liquid sprayers, etc. The present invention relates to an ultrasonic atomization device that atomizes liquid intermittently or continuously.

Sentence ``Last 1 Rainbow Jutsu,'' - liquid in various fields as mentioned (Thursday 1! 11
In general, the term "liquid" is used to include not only liquids but also liquid substances such as suspensions. Pressure atomizers or liquid atomizers have been used to atomize or atomize (atomize) . To such a spray or liquid spray 2! L Koi Ogawa
Seven illusions
The liquid is atomized by the shearing action between the liquid and the outside air (atmosphere). Therefore, in order to atomize the supplied liquid, it is necessary to increase the liquid supply pressure, and the liquid supply equipment, such as pumps and piping, becomes complicated and large.

Furthermore, the amount of injection ti can be adjusted by changing the pressure of the supplied liquid or by changing the area of the nozzle injection port, but +
I77's method resulted in poor atomization during low flow (at low pressure), and as a countermeasure, air or steam was used in conjunction with medium and large boilers to make the supplied liquid fuel whole. ing. As a result, devices have become increasingly complex and large. On the other hand, in the latter method, the structure of the nozzle is extremely complicated, and its adjustment and maintenance are difficult.

In order to improve the drawbacks of the conventional deterioration devices, attempts have been made to pressurize and inject a liquid material from the injection port of the deterioration device and at the same time apply ultrasonic vibrations to the liquid material.

&'L?'(Nuki' 2 yo 2 yo 2 1 ゑ) and 1 imaginary However, the conventional liquid atomization device by M wave combination is
t is extremely small and ancient! It could not be used for the above-mentioned miniaturization device which requires atomization of a.

In order to solve the above-mentioned conventional problems and achieve atomization of a large volume of liquid, the present applicant provided an edge part at the end of the ultrasonic transducer and supplied liquid to the edge part in the form of a thin film. An ultrasonic jetting method and a jetting nozzle have been proposed in which the liquid is atomized into large particles from the edge portion (Japanese Patent Application No. 1983).
-77572).

The injection nozzle, that is, the deterioration device, will be briefly explained with reference to FIG. A shaped Jr. box 4 is provided. A liquid supply means, ie, a nozzle hole 6, is provided at the lower end of the valve box 4.

A vibrator io is disposed passing through the center hole 2 of the valve box 4. The vibrator 10 includes a main body part 14, a transducer shaft part 16 in the shape of an elongated column having a smaller diameter than the main body part 14, and the main body part 14 and the shaft part 1.
6. The main body 14 is provided with a flange 20 having a larger diameter, and the flange 20 connects to a shoulder 22 formed at the upper end of the valve box 4 and a bolt (not shown) to one end surface of the valve box 4. It is attached to the valve body 4 by an annular vibrator retainer 24 attached by the holder 24.

The shaft portion 16 of the vibrator 10 further protrudes below the valve body 4 and the nozzle hole 6, that is, further outward.

An edge portion 26 is formed at the tip of the vibrator 10, that is, the tip of the shaft portion 16.

According to FIG. 2, the edge portion 26 of the vibration 7-10 is formed by a four-indented annular step whose diameter is gradually reduced, but it may also have a shape having a plurality of chevron-shaped protrusions with the same diameter. Ru.

As described above, one or more nozzle holes 6 for supplying fuel to the edge portion 26 of the vibrator 10 are arranged in an annular shape, and the nozzle holes 6 are arranged to supply fuel [16a is N
, substantially adjacent to one end of the edge portion 26]1, and the other end 6b of the nozzle hole 6 is connected to a fuel supply source (not shown).

is continuously vibrated by an ultrasonic vibration generating means 100 operatively connected to. Therefore, when the liquid fuel is supplied to the edge portion 26 through the nozzle hole 6, the liquid fuel is atomized and injected outward. As a result of research to achieve atomization of liquid, it has been found that if a large volume of liquid is supplied from the nozzle hole 6 to the surface of the vibrator, it will not be atomized and will drip as droplets, or the size of the atomized particles will be large, which is preferable. I found out that there isn't.

The present invention relates to an improvement of such a deterioration device.

2 Town Y Kom [1 target of the present invention is i! J! It is an object of the present invention to provide a super-cooling device that can supply liquid continuously or intermittently.

Another purpose of the unreleased 1% 1 is that it can efficiently expose the liquids of Taiko-1 and Minor; -1- To provide an ultrasonic exposure device according to Hasse.

Another object of the present invention is that the state of atomization (!li, @, particle size) does not vary depending on the properties of the supplied liquid, especially the viscosity.
An object of the present invention is to provide an ultrasonic exposure device that can achieve stable atomization.

The above-mentioned aspects for reading and writing are achieved by the ultrasonic atomization device according to the present invention. In summary, the present invention comprises ultrasonic vibration generating means;
An ultrasonic exposure device comprising an elongated vibrator connected at one end to the ultrasonic vibration generating means and having an edge portion at the other end, supplying liquid to the edge portion to atomize the liquid. , the edge portion is constituted by a stepped protrusion formed on the outer periphery of the tip of the vibrator, and a stepped protrusion formed on the inner periphery of a recess provided at the tip of the vibrator, and The ultrasonic exposure device is characterized in that the step-like projection and the inner step-like projection are communicated with each other through one or more liquid supply holes.

Next, the ultrasonic deterioration device according to the present invention will be explained in detail with reference to the drawings.

The present invention can be suitably used in various applications as described in -L, but in this embodiment, it is used for the cast turbine fuel nozzle described in connection with FIG. Only the tip of the light fixture is shown.

In the exposure device related to unoccurred IJI, that is, in the present embodiment, in the gas turbine fuel nozzle 1, on the outer periphery of the tip of the vibrator 10, there is an annular chevron-shaped step projection 2 having the same diameter and having multiple stages.
6A is formed. Furthermore, a recess 3 is provided at the tip of the vibrator 10.
According to the present invention, the outer circumferential stepped protrusion 26A and the inner circumferential stepped protrusion 26B are provided on the inner circumferential portion of the recess 30. Protrusion 26
B constitutes the edge portion 26, that is, the liquid atomization portion.

In this embodiment, the outer circumferential stepped protrusions 26A are provided in three stages, and the inner circumferential stepped protrusions are provided in two stages, but the number of stages is not limited to this and may be any number. Furthermore, although the outer circumferential stepped projection 26A and the inner circumferential stepped projection 26B are annular projections having the same diameter, they may also be stepped projections having gradually different diameters. Furthermore, it is also possible to have protrusions of different shapes from the outer circumferential stepped protrusions and the inner circumferential stepped protrusions. What is important is that edges for liquid atomization are formed on the outer and inner peripheries of the tip of the vibrator.

According to the present invention, the outer peripheral stepped projection 26A and the inner peripheral stepped projection 26B are communicated through one or more liquid supply holes 32. The diameter and number of the liquid supply holes 32 will vary depending on the size and shape of the liquid atomization portions of the outer stepped projection and the inner stepped projection. Further, the plurality of liquid supply holes may be formed offset from each other in the axial direction of the vibrator (liquid supply hole 32a in FIG. 1).

In the above configuration, when liquid is supplied from the nozzle hole 6 to the vibrator lO, the liquid is atomized and sprayed at the outer circumferential stepped projection 26A, and on the other hand, the liquid is passed through the liquid supply hole 32 to the inner circumferential stepped projection 26B. is supplied to and atomized.

FIG. 3 shows another embodiment of the present invention, in which a nozzle hole 6 is formed inside the vibrator 10 and a vibrating exposure device is shown in which the liquid is supplied from inside to the edge portion 26. Child 1
Outer circumferential stepped projection 26A and inner circumferential stepped projection 26B at the tip of 0
are formed, and an outer circumferential stepped projection 26A and an inner circumferential stepped projection 26B.
This is the same as in the previous embodiment in that a liquid supply hole 32 is provided to communicate with the vibrator.
The difference is that the liquid is supplied from the liquid through the liquid supply hole 32 to the outer peripheral stepped protrusion 26A.

According to the exposing device according to the present invention configured as described above, regardless of the properties of the liquid, when the liquid supply 11V is small, of course, a large flow? It is possible to stably supply liquid to the vibrator even when the liquid is in use, thereby increasing the atomization of the liquid.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view of an ultrasonic hatching device according to the present invention. Figure 2 shows the conventional super? It is a cross-sectional view of the 'T revealing device. FIGS. 3A and 3B are partial cross-sectional views of other embodiments of the ultra-tension display device 4 according to the present invention. l: A and other devices 6: Nozzle hole 10: Vibrator 26: Edge portion 26A/outer circumferential stepped projection 26B: Inner circumferential stepped projection 30: Recess 32: Liquid supply hole agent Patent attorney l-s Akira Kura Tachibana, 4 ．． I-
1・N V) Figure 1 6 ('I

Claims (1)

[Claims] 1) It is equipped with an ultrasonic vibration generating means and an elongated vibrator connected at one end to the ultrasonic vibration generating means and having an edge portion at the other end, and supplying a liquid to the edge portion to generate the liquid. In the ultrasonic atomization device for atomization, the edge portion is
It is composed of a stepped projection formed on the outer periphery of the tip of the vibrator, and a stepped projection formed on the inner periphery of a recess provided at the tip of the vibrator, and the outer circumferential stepped projection and . An ultrasonic atomization device, characterized in that the inner circumferential stepped projection is communicated with one or more liquid supply holes.