Dab tsi yog cov haujlwm ntawm ultrasonic ntxuav?
Lub tshuab ntxuav ultrasonic siv ultrasonic nthwv dej rau cavitate, nrawm thiab ncaj qha cov kua thiab av kom tawg, emulsify, thiab tev tawm cov av txheej kom ua tiav lub hom phiaj ntawm kev ntxuav. Lub hauv paus ntsiab lus ntawm kev tu ultrasonic yog tias qhov teeb meem siab oscillation teeb liab tawm los ntawm lub tshuab hluav taws xob ultrasonic hloov mus rau hauv high-frequency mechanical oscillation los ntawm lub sensor thiab propagated rau hauv nruab nrab tu hnyav. Cov nthwv dej ultrasonic tshem tawm tib lub xaim hluav taws xob nyob rau hauv cov kua ntxuav, ua rau cov kua dej ntws, tsim ntau txhiab tus pa npuas me me.
1. Cavitation nyhuv: Cov nyhuv cavitation yog tias ultrasonic tsis yog kis mus rau cov kua nyob rau hauv ib tug high-frequency conversion txoj kev compressive quab yuam thiab decompression cuam tshuam ntau tshaj 20, 000 zaug ib ob. Thaum depressurized, ib pawg ntawm lub tshuab nqus tsev nuclei yog tsim nyob rau hauv cov kua. Nyob rau hauv qhov kev txiav txim ntawm compressive quab yuam, lub tshuab nqus tsev nucleus pab pawg npuas tsim muaj zog cuam tshuam thaum lub siab tawg, tev tawm cov av ntawm qhov chaw ntawm cov khoom yuav tsum tau ntxuav, thiaj li ua tiav lub hom phiaj ntawm kev tu huv.
2. DC nyhuv: Qhov tshwm sim uas ultrasonic tsis ntws mus rau hauv cov kev taw qhia ntawm cov kua suab propagation yog hu ua DC. Thaum lub suab yoj siv zog yog 0.5W/cm2, qhov ncaj qha tam sim no tuaj yeem pom nrog lub qhov muag liab qab, thiab qhov ntws tawm yog tsim los ntawm perpendicular mus rau qhov chaw vibration, thiab tus nqi ntws yog li 10cm / s. Los ntawm qhov tam sim no ncaj qha, cov av oily ntawm qhov chaw ntawm cov khoom ntxuav yog nplawm, thiab cov tshuaj ntxuav ntawm cov av kuj tsim cov convection. Cov kua nplaum uas yaj cov av yog tov nrog cov kua tshiab kom nrawm nrawm nrawm thiab ua lub luag haujlwm tseem ceeb hauv kev kho cov av.
3. Acceleration: Lub acceleration tshwm sim los ntawm cov kua hais. Rau high-frequency ultrasonic ntxuav, cov nyhuv cavitation tsis pom tseeb. Nyob rau lub sijhawm no, kev tu tsuas yog tso siab rau kev nrawm ntawm cov kua ua kua kom cuam tshuam cov khoom hauv qab kev txiav txim ntawm ultrasonic tsis ua ultra-precision tu cov av.
