Ukwethulwa Kokubala kanye Nendlela Yokulinganisa Yekhono Lokuhlola Isikrini Esidlidlizayo
Uma usebenzisa isikrini esidlidlizayo, isikrini sinezinkomba ezimbili ezibalulekile zenqubo: eyodwa umthamo wokucubungula, okuyinkomba yobuningi ekhombisa umsebenzi wokuhlola. Okunye ukusebenza kahle kokuhlolwa, okuyinkomba yekhwalithi ekhombisa umsebenzi wokuhlola. Phakathi kwemikhiqizo eku-sieve, lapho inani lamabanga amahle angadluli emigodini yesihlungo, umphumela wokuhlunga ubi kakhulu. Ukuze kuhlolwe ngobuningi ukuphelela kokusefa, inkomba yokusebenza kahle kokuhlunga kufanele isetshenziswe.
Ukuhlola ukusebenza kahle kwesikrini esidlidlizayo: Kuyinkomba yekhwalithi yokusebenza kwesikrini, ekhombisa izinga lokusebenza kokuhlola kanye nekhwalithi yemikhiqizo yokuhlola. Ngokuvamile kuvezwa njengephesenti ngesilinganiso sesisindo somkhiqizo ongaphansi otholwe ngesikhathi sokuhlungwa kuya esisindweni sezingxenye ezincane kunosayizi wesisefo oqukethwe kumpahla eluhlaza.
Ngoba kunzima ukukala umkhiqizo wokusebenza kokuhlola ekukhiqizeni kwangempela. Kodwa-ke, kungenzeka ukwenza ukuhlaziya kwe-sieving emkhiqizweni ngamunye wokusebenza kokuhlolwa, ngaleyo ndlela kukalwe amaphesenti esisindo sengxenye encane kasayizi wesisefo lapho ukuphakelwa kwensimbi, umkhiqizo ongaphansi kwesikrini kanye nomkhiqizo wesikrini esingaphezulu udlula lapho ukuhluza. ukusebenza. Ungabala kanjani ukusebenza kahle kokuhlolwa kwesikrini esidlidlizayo?
Ukusebenza kahle kokuhlola kungabalwa ngesikrini sensimbi ephansi: E=β(α-θ)/α(β-θ)*100%.
α——Okuqukethwe kosayizi wezinhlayiyana ezincane kunosayizi wesisefo endabeni eluhlaza;
β——Okuqukethwe kosayizi wezinhlayiyana ezincane kunosayizi wesisefo emkhiqizweni ongaphansi kwesisefo;
θ——Okuqukethwe yizinhlayiyana ezincane kunosayizi wesisefo emkhiqizweni osesefweni.
Isibonelo: isikrini esidlidlizayo esinembobo yesisefo engu-15 mm, ngemva kokuthathwa kwesampula nokuhlaziywa kwe-sieving, kuyaziwa ukuthi usayizi wezinhlayiya ezingu-15-0 mm uhlanganisa u-50% wezinto ezihlungiwe, kanti umkhiqizo osesefweni uqukethe u-8% wezinhlayiya. usayizi wezinhlayiyana, kanye nokusebenza kahle kwe-sieving kubalwa. Mangaki?
α (okuqukethwe kwempahla eluhlaza kuncane kunosayizi wesisefo) = 50%, θ (okuqukethwe komkhiqizo kusisefo kuncane kunosayizi wesisefo) = 8%
Ngakho: E=100(α-θ)/α isikrini sensimbi (100-θ)*100%=100(50-8)/50(100-8)*100% =91.3%
Ngenxa yokuthi ukusebenza kahle kokuhlolwa kwesikrini esidlidlizayo kuthintwa izici eziningi, kuya ngokuthi iyiphi impahla okufanele icutshungulwe, ukwakheka kwezinto, inhloso yokuhlola kanye nomswakama kanye ne-viscosity yento.
Indlela yokunquma yokusebenza kahle kwe-sieving
Thatha amasampula njalo ngemizuzu eyi-15-20 ekugelezeni kwezinto ezingena kusihlungo kanye nokugeleza kwempahla kusihlungo. Isampula kufanele yenziwe ngokuqhubekayo amahora angama-2-4. Isampula evamile etholiwe ihlungwa kusihlungi sokuhlola. Imbobo yesisefo yesisefo sokuhlola ihambisana nosayizi wemeshi wesisefo osetshenziswa ekukhiqizeni uyafana. Amaphesenti wokuqukethwe u-α kanye no-θ wamabanga amancane kunosayizi wesisefu kumpahla eluhlaza kanye nomkhiqizo osesefweni kubalwa ngokulandelana, futhi ukusebenza kahle kwesisefo kungabalwa ngokufaka esikhundleni sefomula.
Uma singekho isisefo sokuhlola esinosayizi ofanayo nesisefo, ungasebenzisa isethi yezisefo ukuze uhlaziye, udwebe imiphumela ibe ijika lokuhlaziya isisefo, bese ubala iphesenti lokuqukethwe kwaleli banga kusukela ejikeni lokuhlaziya isihlungo. a kanye nethi.
Ukufingqa, ukusebenza kahle okuphansi kwesikrini esidlidlizayo kuthintwa izici eziningi. Uma isikrini sigqokile, noma izinga leskrini lingekho phezulu, izinhlayiya ezinkulu kunosayizi wesikrini zizongena kumkhiqizo ngaphansi kwesikrini. Uma ukusebenza kahle kokuhlola kukhuphuka ngendlela engavamile nangokucijile, kungenzeka ukuthi isikrini sigugile kakhulu, noma ikhwalithi yeskrini engeyinhle. Phezulu, usayizi wesisefo awuhlangabezani nezidingo zekhwalithi, okuholela ezinhlayiyeni eziningi ezinkulu kunosayizi wesisefo.
