I Need help for ultrasonitc atomizer (transducer)

AI Thread Summary
Prototyping an ultrasonic transducer at 50 kHz presents challenges, particularly in calculating the dimensions of the horn and back mass. The focus should be on the length of the back mass in millimeters, as it must reflect the wave with the correct phase delay, which depends on the speed of sound in the material. The design involves using an exponential taper for the horn to effectively atomize liquid. Current calculations indicate a wave length of 101.92 mm, with the horn measuring 25.48 mm, while the back mass is notably shorter at 10 mm. Temperature issues arise after 30 seconds of operation, exceeding 50°C, indicating potential design or material challenges.
MRoydev
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I am trying to prototype ultrasonic transducer, but it is little difficult. I did't found a lot of articles about it, the hard work is how to calc the the dimensions of the horn and the back mass, we are working at 50 kHz frequency. I have generator with regulator for the frequency we havo some prototypes wich have worked from AL2017 now I am trying to make it from SS417/420. I have another problem with the temperture after 30 sec of work it is more then 50 C deg. It is working at half sound lenght, from what I saw there are different design, half sound lenght , one and two. If some need more information i will share and for is little difficult to understand the physics behind it.
Thanks for the heml
 
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Welcome to PF.

MRoydev said:
... the hard work is how to calc the the dimensions of ... the back mass, we are working at 50 kHz frequency.
It is not the back-mass in kg that is important, it is the length in millimetres of the back-mass that must be dimensioned, to reflect the wave with the correct phase delay. That requires knowing the speed of sound in the back-mass material.

How do you arrange a horn to atomise, a liquid?
I would expect an exponential taper to a smaller section.
 
Hi Baluncore,
Thank you for the great welcome. I am currently trying with this scheme, from my calculation the lenght of the wave is 101.92 mm long and we are currently using half wave lenght and the horn is 25.48 mm, but the back is shorter. We have one chines trasducer like this one on the picture wich have back mass with lenght only 10 mm.
1741244505416.png
 
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