Txoj Cai Ua Haujlwm Ntawm Ultrasonic Tu
Aug 07, 2023
Ultrasonic nthwv dej propagate nyob rau hauv cov kua, ua rau cov kua thiab ntxuav tank kom co ua ke ntawm ultrasonic zaus. Thaum cov kua thiab ntxuav lub tank vibrate, lawv muaj lawv tus kheej inherent zaus, uas yog lub zaus ntawm lub suab tsis, yog li ntawd tib neeg hnov buzzing suab. Nrog kev txhim kho txuas ntxiv ntawm kev lag luam tu, ntau thiab ntau kev lag luam thiab kev lag luam tau thov Ultrasonic tu.
Lub hauv paus ntsiab lus ntawm Ultrasonic tu yog hais tias lub high-frequency oscillation teeb liab xa tawm los ntawm lub tshuab hluav taws xob ultrasonic hloov mus rau hauv high-frequency mechanical oscillation los ntawm transducer thiab propagated mus rau nruab nrab -- tu hnyav. Cov hluav taws xob rau pem hauv ntej ntawm ultrasonic nthwv dej hauv cov tshuaj ntxuav ua rau cov kua ntws thiab ua kom muaj kaum tawm txhiab tus kab ncaj nraim ntawm 50-500 μ Cov npuas me me ntawm m muaj nyob hauv cov kua thiab vibrate nyob rau hauv qhov kev txiav txim ntawm lub suab teb. Cov npuas no tsim thiab loj hlob nyob rau hauv qhov tsis zoo siab cheeb tsam qhov twg ultrasonic tsis propagate longitudinally, thaum nyob rau hauv qhov zoo siab cheeb tsam, thaum lub suab siab mus txog ib tug tej yam nqi, cov npuas sai sai thiab mam li nco dheev kaw. Thiab thaum lub npuas kaw, ib qho kev poob siab yog tsim, tsim ntau txhiab tus huab cua nyob ib puag ncig nws, ua rau cov kuab paug tsis huv thiab dispersing lawv hauv cov tshuaj ntxuav. Thaum cov pab pawg neeg tau muab qhwv rau hauv cov roj thiab ua raws li qhov chaw ntawm qhov chaw tu, cov roj yog emulsified, cov khoom sib cais, thiab cov khoom tu yog purified. Hauv cov txheej txheem no hu ua "cavitation", qhov kev kaw ntawm npuas tuaj yeem tsim qhov kub thiab txias ntawm ntau pua degrees Celsius thiab instantaneous high pressures tshaj 1000 atmospheric pressures.
Qhov zoo ntawm Ultrasonic tu yog: zoo ultrasonic tu nyhuv thiab ua haujlwm yooj yim. Lub suab uas tib neeg hnov yog lub teeb liab acoustic nrog zaus ntawm 20-20000Hz. Lub suab nthwv dej siab tshaj 20000Hz yog hu ua ultrasonic yoj. Kev sib kis ntawm lub suab nthwv dej propagates longitudinally raws li Sine nthwv dej, ua ib tug loj tus naj npawb ntawm cov npuas me me. Ib qho laj thawj yog tias lub zog tensile hauv zos hauv cov kua ua rau lub siab tsis zoo, thiab qhov txo qis ua rau cov roj yaj hauv cov kua Supersaturation, thiab khiav tawm ntawm cov kua, ua npuas me me; Lwm qhov laj thawj yog qhov muaj zog tensile kev nyuaj siab "lub kua muag" cov kua rau hauv kab noj hniav, hu ua cavitation.