CN205089493U - Tunable frequency pneumatic type ultrasonic atomization device - Google Patents

Abstract

The utility model relates to an adjustable frequency pneumatic ultrasonic atomization device, which relates to an atomization device. It is equipped with an air supply pipe, a closed ring, an outer cylinder, a water supply pipe, an inner core of the concave cavity, an outer ring of the concave cavity, a gas nozzle and a liquid nozzle; The water inlet of the water inlet receives the atomized liquid source, the air outlet of the air supply pipe and the water outlet of the water supply pipe are connected to the cavity formed by the closed ring and the outer cylinder, the inner core of the concave cavity is provided with external threads, and the outer ring of the concave cavity is provided with The internal thread matched with the inner core of the concave cavity, the inner core of the concave cavity and the outer ring of the concave cavity form the concave cavity. By adjusting the relative position of the inner core of the concave cavity and the outer ring of the concave cavity, the depth of the cavity can be adjusted, thereby adjusting the atomization device The atomization working frequency ensures that the atomization device can achieve the best atomization effect under various working conditions; the gas nozzle is set in the middle of the end of the gas supply pipe for spraying high-pressure gas; the liquid nozzle is set in the gas nozzle around the hole for ejecting liquid. The structure is simple, the practicability is strong, and the working range is wide.

Description

A Pneumatic Ultrasonic Atomization Device with Adjustable Frequency

technical field

The utility model relates to an atomizing device, in particular to a frequency-adjustable pneumatic ultrasonic atomizing device.

Background technique

Fuel needs to be atomized before combustion in the engine. The quality of atomization directly affects the combustion performance. Poor atomization quality of fuel will lead to incomplete combustion, increased harmful gas content in smoke, easy coking of nozzles, etc., reducing equipment Life, especially in the field of aero engines, will bring serious safety risks when the atomization effect deteriorates.

Generally, the atomized liquid (oil or water) uses a pressure atomizing nozzle (centrifugal nozzle). When the liquid flow rate is too large (or the viscosity of the liquid is too large), due to the increase of the nozzle size of the centrifugal nozzle and the increase of the liquid film at the nozzle outlet, the atomization quality of the liquid is deteriorated, and the average Sauter diameter of the droplet increases sharply. In order to obtain an ideal average diameter of liquid droplets when the liquid flow rate is large, the atomizer generally accounts for 30% to 60% of the mass of the atomized liquid, which will waste a lot of atomizer. The difference is that the ultrasonic atomizing nozzle not only uses the aerodynamic energy of the atomizer, but mainly relies on the ultrasonic energy to atomize the liquid, so it can also obtain good atomization performance and a wide working range at lower airflow rates. scope.

Sun Xiaoxia (Sun Xiaoxia, research progress of ultrasonic atomizing nozzles [J], Industrial Furnace, V0l.26No.lJan.2004:19-32) introduced the principle of ultrasonic atomizing nozzles, research progress and application examples, and pointed out that resonant cavity ultrasonic fogging The frequency of the spray nozzle has the following empirical formula:

f=c/4[h+0.3(D _r -D _c )]

Where c is the speed of sound, h is the depth of the resonant cavity, D _r and D _c are the diameter of the resonant cavity and the diameter of the central rod, respectively.

Contents of the invention

The purpose of the utility model is to provide a frequency-adjustable pneumatic ultrasonic atomization device capable of efficiently atomizing various liquids (fuel oil, water, heavy oil or other liquids).

The utility model is provided with an air supply pipe, a closed ring, an outer cylinder, a water supply pipe, an inner core of a concave cavity, an outer ring of a concave cavity, a gas injection hole and a liquid injection hole; The air channel, the water inlet of the water supply pipe receives the atomized liquid source, the air outlet of the air supply pipe and the water outlet of the water supply pipe are connected to the cavity formed by the closed ring and the outer cylinder, the inner core of the concave cavity is provided with external threads, and the concave cavity The outer ring is provided with an internal thread matched with the inner core of the concave cavity. The inner core of the concave cavity and the outer ring of the concave cavity form a concave cavity. By adjusting the relative position of the inner core of the concave cavity and the outer ring of the concave cavity, the depth of the concave cavity can be adjusted. In this way, the atomization working frequency of the atomization device can be adjusted to ensure that the atomization device can achieve the best atomization effect under various working conditions; Holes are arranged around the gas injection holes for ejecting liquid.

There may be four liquid spray holes.

The outer cylinder can be a regular hexahedron cylinder, the outer ring of the cavity can be a regular hexahedron cylinder, and the shape of the regular hexagon is convenient for clamping.

The utility model discloses a frequency-adjustable pneumatic ultrasonic atomization device. The supersonic gas is sprayed from the gas nozzle hole, and impacts the concave cavity formed by the combination of the outer ring of the concave cavity and the inner core of the concave cavity. Under the action of the air flow, the nozzle A shock wave train is formed between the cavity and the concave cavity, causing the pressure to oscillate strongly, and an ultrasonic field is generated after resonating with the cavity. Under the strong action of power and ultrasonic field, it quickly breaks from a liquid column to a liquid filament, and finally forms uniform and extremely small-diameter atomized droplets to achieve the purpose of atomization. The utility model can realize high-efficiency atomization of liquid substances, and can change the ultrasonic frequency by adjusting the depth of the concave cavity according to actual working conditions and liquid types, so as to obtain the best atomization effect. The utility model has the advantages of simple structure and strong practicability.

The utility model can change the ultrasonic frequency by adjusting the depth of the concave cavity according to actual working conditions, liquid types, etc., so as to realize efficient atomization of various liquids under various working conditions. Utilizing the ultrasonic waves generated by the resonance of the ultrasonic air flow and the concave cavity, a good atomization effect can be obtained even with a small amount of atomizing gas.

Compared with the traditional pneumatic ultrasonic atomizing nozzle, the utility model has the following advantages:

(1) The depth of the concave cavity is adjustable, so the frequency of the sound field can be controlled, and the best atomization performance can be obtained during the atomization process under different working conditions;

(2) Due to the adjustable frequency, the atomization device proposed by the utility model can realize the atomization of various liquids to be atomized, and has a wide working range.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of an embodiment of the present invention.

Fig. 2 is a cross-sectional view of an embodiment of the present invention.

Fig. 3 is a three-dimensional view of the air supply pipe of the embodiment of the utility model.

Fig. 4 is a cross-sectional view of the air supply pipe of the embodiment of the present invention.

Fig. 5 is a front view of the outer cylinder of the embodiment of the present invention.

Fig. 6 is a top view of the outer cylinder of the embodiment of the present invention.

Fig. 7 is a front view of the closed ring of the embodiment of the present invention.

Fig. 8 is a top view of the closed ring of the embodiment of the present invention.

Fig. 9 is a front view of the cavity inner core of the embodiment of the present invention.

Fig. 10 is a three-dimensional view of the outer ring of the cavity of the embodiment of the present invention.

Fig. 11 is a cross-sectional view of the outer ring of the cavity of the embodiment of the present invention.

detailed description

Preferred embodiments of the present utility model are described below in conjunction with accompanying drawings.

As shown in Figures 1 to 11, the utility model embodiment is provided with an air supply pipe 1, a closed ring 2, an outer cylinder 3, a water supply pipe 4, a cavity inner core 5, a cavity outer ring 6, a gas injection hole 7 and a liquid injection nozzle. Hole 8; the air inlet of the air supply pipe 1 is externally connected to the air inlet channel of the atomizing gas source, the water inlet of the water supply pipe 4 is externally connected to the atomization liquid source, and the air outlet of the air supply pipe 1 and the water outlet of the water supply pipe 4 are connected and closed In the cavity formed by the ring 2 and the outer cylinder 3, the inner core 5 of the concave cavity is provided with an external thread, and the outer ring 6 of the concave cavity is provided with an internal thread matched with the inner core 5 of the concave cavity. The outer ring 6 of the cavity forms a concave cavity. By adjusting the relative position of the inner core 5 of the cavity and the outer ring 6 of the cavity, the depth of the cavity is adjusted, so as to adjust the atomization working frequency of the atomization device to ensure that the mist is stable under various working conditions. The atomization device can achieve the best atomization effect; the gas nozzle hole 7 is arranged in the middle of the end of the gas supply pipe 1 for ejecting high-pressure gas; the liquid nozzle hole 8 is arranged around the gas nozzle hole 7 for ejecting liquid.

The liquid spray hole 8 can be provided with four.

The outer cylinder can be a regular hexahedron cylinder, the outer ring of the cavity can be a regular hexahedron cylinder, and the shape of the regular hexagon is convenient for clamping.

The gas supply pipe 1 is the air intake channel of the atomizing gas source. After passing through the gas supply pipe, the high-pressure gas is ejected from the gas nozzle 7 at supersonic speed, and impacts the cavity formed by the combination of the inner core 5 of the cavity and the outer ring 6 of the cavity. , and form a strongly oscillating shock wave train between the outlet of the gas nozzle and the concave cavity, and generate the ultrasonic field required for atomization after resonating with the concave cavity. The gas injection hole 7 is located at the end of the air supply pipe 1 and is designed with a shrinking pipe; the inner core 5 of the concave cavity is provided with external threads, as shown in Figure 9. The length of the thread can be processed according to the requirements of the frequency adjustment range. The outer ring 6 of the cavity is provided with an internal thread matched with the inner core 5 of the cavity. By adjusting the relative position of the inner core 5 of the cavity and the outer ring 6 of the cavity, the depth H of the cavity can be adjusted simply and conveniently (as shown in FIG. 2 ). shown), so as to adjust the atomization working frequency of the atomization device.

At the same time, the liquid to be atomized enters the cavity formed by the closed ring 2 and the outer cylinder 3 from the water supply pipe 4, and is arranged from the four liquid nozzles 7 at the end of the air supply pipe 1 in the circumferential direction (as shown in Figures 3 and 4). (shown) spraying, under the strong action of aerodynamic force and ultrasonic field, it is quickly broken from a liquid column to a liquid filament, and finally forms a uniform atomized droplet with a very small diameter to achieve the purpose of atomization. The utility model can realize high-efficiency atomization of liquid substances, and can change the ultrasonic frequency by adjusting the depth H of the concave cavity according to actual working conditions and liquid types, so as to obtain the best atomization effect.

Claims (3)

1. A frequency-adjustable pneumatic ultrasonic atomization device is characterized in that it is provided with an air supply pipe, a closed ring, an outer cylinder, a water supply pipe, an inner core of a concave cavity, an outer ring of a concave cavity, a gas injection hole and a liquid injection hole; The air inlet of the air supply pipe is externally connected to the air inlet channel of the atomizing gas source, the water inlet of the water supply pipe is externally connected to the atomization liquid source, and the air outlet of the air supply pipe and the water outlet of the water supply pipe are connected to the cavity formed by the closed ring and the outer cylinder Inside, the inner core of the concave cavity is provided with external threads, and the outer ring of the concave cavity is provided with internal threads matched with the inner core of the concave cavity. The inner core of the concave cavity and the outer ring of the concave cavity form a concave cavity. By adjusting the inner core of the concave cavity and the The relative position of the outer ring of the concave cavity can be adjusted to adjust the depth of the cavity, thereby adjusting the atomization working frequency of the atomization device to ensure that the atomization device can achieve the best atomization effect under various working conditions; The middle of the end of the air pipe is used to eject high-pressure gas; the liquid nozzle is arranged around the gas nozzle to eject liquid. 2. A frequency-adjustable pneumatic ultrasonic atomization device as claimed in claim 1, characterized in that said liquid spray holes are provided with four. 3. A frequency-adjustable pneumatic ultrasonic atomization device as claimed in claim 1, characterized in that the outer cylinder is a regular hexahedral cylinder, and the outer ring of the concave cavity is a regular hexahedral cylinder.