Puas yog ultrasonic nebulization ua haujlwm?

Cov kev tshawb fawb cuam tshuam ntseeg tias ultrasonic atomization yog cov txheej txheem ntawm kev siv lub zog ultrasonic los ua cov kua dej zoo hauv cov roj theem, uas yog, ultrasonic tsis yog tsim los ntawm cov kua vibrating, thiab lub ncov vibration muaj li ntawm amplitude sib cais thiab tawg. droplets los ntawm qhov chaw. Raws li ultrasonic zaus nce, cov atomized droplets ua thinner thiab finer. Feem ntau, nyob rau hauv qhov kev txiav txim ntawm ultrasonic vibration zaus, zoo tee dej tuaj yeem tau. Tsis tas li ntawd, lub teb zaus ultrasonic tuaj yeem tshem tawm los yog nyias cov txheej txheem ciam teb nyob ze ntawm qhov chaw hloov hluav taws xob, yog li txhawb kev hloov hluav taws xob.

Cov txheej txheem sib txawv ntawm cov txheej txheem atomization yog siv, uas tuaj yeem faib raws li cov txiaj ntsig ntawm lub zog hloov pauv ntawm atomization ntawm cov kua zaj duab xis nto. Cov txheej txheem tshuab lossis cov txheej txheem atomization ib txwm muaj, xws li ob-kua atomization, siab atomization thiab rotary disk atomization, siv lub zog siv tshuab los txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau ua rau cov kua dej tuaj yeem ua rau tawg hauv cov tee. Cov txheej txheem no xav tau lub zog ntau dua thiab tsis muaj kev tswj xyuas qhov kawg ntawm qhov loj thiab ejection tshaj tawm ntawm cov tee dej.

Sib txawv ntawm ib txwm atomization, nws tuaj yeem ua haujlwm tau zoo dua thiab tsuas yog xav tau lub zog hluav taws xob kom xa mus rau piezoelectric transducer los tsav lub nozzle kom resonate. Cov tee dej tsis muaj qhov txav txav, tsuas yog cov khoom siv vibrations tsim los ntawm cov khoom siv hluav taws xob siv los tsim cov tee dej. Txij li tsis muaj lub zog ntxiv yuav tsum tau ua, cov xaum me me tuaj yeem tswj tau zoo dua.

The average diameters of droplets generated by capillary peaks at forced vibration frequencies of 10–800 kHz for different working fluids (including water, oil, and molten wax), and the relationship between the average diameters of jetted droplets was established. dp = 0.348π / ρf2

Capillary vuag thiab cavitation cuam tshuam

Lub cim ntawm ultrasonic atomization yog raws li capillary yoj nyhuv thiab cavitation nyhuv. Thaum ua haujlwm ntawm 20KHz atomizing lub taub hau nrog lub zog qis, nws tau pom tias muaj kab sib chaws -zoo li cov qauv tsis tu ncua ntawm lub taub hau atomizing, nrog tib tus naj npawb ntawm cov ncov thiab troughs ib cheeb tsam, hu ua capillary nthwv dej . Qhov hluav taws xob tsis tshua muaj hluav taws xob no ua rau muaj kev cuam tshuam ntawm qhov chaw yam tsis muaj qhov ejection tiag tiag.

Cavitation yog qhov tshwm sim ntawm microscopic uas tsis tuaj yeem pom ncaj qha rau ntawm lub taub hau atomizing nrog qhov muag liab qab. Ob qhov sib txawv ntawm cov tee dej tau pom los ntawm lub sijhawm lub koob yees duab-lapse, xws li nyob ze - cov tee dej thiab cov streaks, nrog cov streaks muaj qhov nrawm dua, thiab ze rau - cov tee kheej kheej muaj qis tshaj tawm, qhov twg tuaj yeem pom muaj cavitation.

Kev tsim cov kab noj hniav nyob ze ntawm lub atomizer nto thiab hauv cov yeeb yaj kiab ua kua thiab tom qab tawg ntawm cov kab noj hniav no ua rau hauv zos tso tawm ntau lub zog; Yog li, piv rau qhov qis ejection tshaj tawm pom nyob rau hauv cov ntaub ntawv ntawm droplet ejection induced los ntawm capillary yoj propagation, cov cavitation nyhuv zoo heev tsub kom lub droplet ejection tshaj tawm. Nyob rau tib lub sijhawm, qhov chaw nyob ntawm cov kua ntawm lub taub hau ntawm atomizing yuav txo qis vim qhov zaus ntawm atomizer nce, ua rau nws nyuaj rau ntes capillary vuag ntawm qhov chaw.