Samar da Ruwan Gilashin Gilashin Gishiri Da Fasalolin Geometric Su A Sashe

Tun da furotin na ruwa wani yanki ne na kyauta na kyauta, siffarsa yana da rikitarwa. Don tsara shirin machining na propeller, dole ne mu fara bincikar halayensa na geometric. Na asali propellers, kamar sukurori, kunshi daya ko biyu juya a kusa da shasha. Daga baya aiki ya gano cewa idan an dauki wani sashe na saman karkace maimakon cikakken da'irar, ingancin zai karu. Ya ɗauki fiye da shekaru 100 na aikin samarwa don samar da wannan siffa a yau. Babban hanyar ƙira ta hanyar tallan ita ce hanyar taswira, wato, ƙirar ana yin ta ta hanyar taswirar da aka zana bisa ga sakamakon gwaji na ƙirar ƙirar. Dangane da taswirar zane, da injin inji ne yafi B-type propellers, AU-type propellers, kuma SSPA-type propellers.

Samar da Ruwan Gilashi

Fuskar matsi na burbushin fale-falen wani bangare ne na saman karkace. An kafa farfajiyar karkace ta hanyar motar bas ab mai juyawa a kusa da axis OO1 na tashar propeller, kuma a lokaci guda yana motsawa sama tare da OO1 a tsayin daka, kamar yadda aka nuna a FIG. 1. Wurin motsi na kowane batu akan layin janar shine karkace. 

Lokacin da aka duba a cikin axis, karkace shi ne baka. Lokacin da aka duba shi daga alƙawarin kai tsaye zuwa axis, karkace zuwa sinusoid. 

Nisa tsakanin kowane batu akan helix guda ɗaya da kafaffen axis OO1 yana dawwama. Sabili da haka, idan an yi farfajiyar cylindrical tare da radius na karkace a matsayin radius (layin tsakiya na cylindrical shine axis OO1), an haɗa karkace a cikin farfajiyar cylindrical. Ana kiran karkatar da baya na mashin bas ɗin baya, wanda aka bayyana ta kusurwar baya ε, gabaɗaya ε = 5 ~ 15 °.

Halayen Sashe na Blade

Domin ruwan wukake dole ne su yi tsayin daka na farfasa, dole ne su sami wani kauri. Wuraren suna da matsakaicin kauri a kan yanki da aka yanke a radius daban-daban, wanda aka ƙaddara ta hanyar lissafin haske.
Silindrical surface tare da radius R (tsakin wanda ya zo daidai da tsakiyar shaft propeller) yana da tangent zuwa ruwan wukake, kuma sashin da aka yanke shine saman da aka yanke. Idan aka kalli hanyar gashin gashin tsuntsu, jirgin da aka yanke wani yanki ne na baka mai radius R, kuma ba madaidaiciyar layi ba. 

Gabaɗaya akwai nau'ikan ɓangarori guda biyu: Airfoil da baka, kamar yadda aka nuna a hoto na 2. Tazarar b tsakanin ƙarshen biyu na tangent jirgin ana kiransa madaidaicin nisa na tangent jirgin, wanda kuma ake kira gunkin tsayin tangent. jirgin sama. Matsakaicin kauri na sashin yana wakiltar t. 

Matsakaicin kauri na sashin mai siffar baka yana tsakiyar, wato, b / 2. Matsakaicin kauri na sashin iska yana kusan kashi uku na nisa daga babban gefen, wato, kusan b / 3. matsayi na matsakaicin kauri na kowane sashe na ruwa ba akai-akai ba. 

Matsakaicin matsakaicin kauri zuwa faɗin maƙarƙashiya ana kiransa kauri rabo, kuma an bayyana shi ta δ, wato, δ = t / b. δ yana nuna ma'aunin kitse da bakin ciki na sashin, kuma babban δ yana nuna cewa sashin yana da kauri da kunkuntar.

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