Piezoelectric two-phase flow ultrasonic atomization spraying nozzle

Abstract

The invention provides a piezoelectric two-phase flow ultrasonic atomization spraying nozzle. The piezoelectric two-phase flow ultrasonic atomization spraying nozzle comprises a piezoelectric vibrator, an amplitude-change pole, a second end cover and a first end cover; the piezoelectric vibrator and the amplitude-change pole are connected through a connecting bolt; an air inlet connector is installed at the tail of the connecting bolt; the second end cover is fixed to the front end of the amplitude-change pole; a laval type valve element is fixed into a step hole of the amplitude-change pole and a groove of the second end cover; a liquid inlet hole is formed in the hole wall face of the step hole of the amplitude-change pole; a plurality of flow guide holes are formed in the positions, close to an outlet, of the laval type valve element in the radial direction; the first end cover is threaded connection to the second end cover; a radial positioning ring is arranged at the position of a clamping groove in the back end of the first end cover; a step type taper valve is installed on the radial positioning ring; the step type taper valve and a vibration separating plate are connected through an adjusting bolt; a resonance chamber is formed between the vibration separating plate and the top end of the first end cover; and a plurality of flexible pipes are arranged in the resonance chamber. According to the piezoelectric two-phase flow ultrasonic atomization spraying nozzle, a large number of superfine fog drops are generated under the low-energy working condition, and the shortcoming that large pulverization amount, small grain size, low power dissipation and directed spraying cannot be considered at the same time through in the traditional technology is overcome.

Description

technical field [0001] The invention belongs to the field of ultrasonic atomizing nozzles, in particular to a piezoelectric two-phase flow ultrasonic atomizing nozzle. Background technique [0002] At present, in the field of ultrasonic atomization technology, there are mainly two methods for generating ultrasonic vibrations: one is to use electroacoustic transducers to generate ultrasound, and the other is to use fluid as power to generate ultrasound. These two methods have their own advantages and disadvantages. Using the electroacoustic transducer to atomize the nozzle produces uniform droplets and low energy consumption. The droplet size changes with the design frequency of the piezoelectric vibrator. The higher the frequency, the droplet size The smaller the size, the disadvantage is that the amount of atomization is small, and the droplets are scattered randomly without direction; the use of hydrodynamic ultrasonic atomization method, the atomization amount is large an...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies in the prior art that cannot combine large atomization volume, fine particle size, low power consumption, and directional spray at the same time, the present invention provides a piezoelectric two-phase flow ultrasonic atomization nozzle. The organic combination of atomization and hydrodynamic ultrasonic atomization can produce a large number of ultra-fine droplets under low energy consumption conditions

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