Valve ya Overcenter vs Counterbalance Valve: Ndi Chiyani Choyenera Kugwiritsa Ntchito?
2024-01-29M'ma hydraulic systems, ndikofunikira kumvetsetsa kusiyana pakati pa valve overcenter ndi avalve yotsutsana. Ngakhale kuti ziwirizi ndizofanana muzochita zina, mwachitsanzo, zonse zingagwiritsidwe ntchito kuteteza katundu kuti asagwere kwaulere, pali kusiyana pakati pa mfundo zawo zogwirira ntchito ndi zochitika zogwiritsira ntchito.
Kusiyana pakati pa valavu yapakati ndi valavu yokwanira
Valve ya overcenter (yomwe imatchedwanso kuti valavu yobwereranso) ndi valavu yothandizira woyendetsa ndege yokhala ndi ntchito yowunika kwaulere. Chomwe chimatchedwa chiŵerengero choyendetsa ndege chimatanthawuza chiŵerengero cha pakati pa malo oyendetsa ndege ndi malo osefukira. Chiŵerengerochi n'chofunika kwambiri pamtundu wa kuthamanga komwe valve imatha kuchoka kutsekedwa mpaka kutseguka kwathunthu, makamaka pansi pa zovuta zosiyanasiyana. Chiŵerengero chochepa cha oyendetsa ndege chimatanthauza kusiyana kwakukulu kwa kuthamanga kwa woyendetsa kumafunika kuti mutsegule valve. Pamene kuthamanga kwa katundu kumawonjezeka, kusiyana kofunikira pakukakamiza kwa oyendetsa maulendo osiyanasiyana oyendetsa kumakhala kochepa.
Valve yotsutsana ndi valavu yomwe imagwiritsidwa ntchito pofuna kuteteza silinda yonyamula katundu kuti isagwe, ndikupereka ntchito yabwino. Poyerekeza ndi ma valve oyendetsa oyendetsa ndege, ma valve otsutsana samayambitsa kusuntha kwamphamvu pamene katundu wolamulidwawo akuchepa. Ma Counterbalance valves nthawi zambiri amagwiritsa ntchito zinthu zowongolera mphamvu za ma cone kapena spool, okhala ndi ma cone counterbalance mavavu omwe amagwiritsidwa ntchito kuteteza ma cylinder drift ndi ma spool counterbalance mavavu omwe amagwiritsidwa ntchito ngati ma brake ma valve pama hydraulic motor application.
Kusankha ntchito
Kugwiritsiridwa ntchito kwa ma valve otsutsana m'masilinda osuntha ndikofunikira pamene katundu angapangitse kuti actuator ipitirire mofulumira kuposa mpope. Kapenanso, ma valve olinganiza angagwiritsidwenso ntchito pawiri za silinda: kuthamanga kwa woyendetsa kudzatsegula valavu ya silinda yolemetsa kwambiri poyamba, zomwe zidzachititsa kuti katundu asamutsire ku silinda ina, ndi valavu yogwirizana idakali yotsekedwa panthawiyi, yomwe imafunika kutsegula kwa Kuthamanga kwa woyendetsa ndi kochepa.
Posankha pakati pa valve overcenter kapena valve yoyenera, kukhazikika kwa makina kumafunika kuganiziridwa. Katundu wosakhazikika ayenera kugwiritsa ntchito chiwongolero chochepa cha woyendetsa kuti akwaniritse kukhazikika kwa makina. Mtundu wa valavu pamapangidwewo umakhudzanso kukhazikika kwachilengedwe kwa mankhwalawa. Mwachitsanzo, mavavu apakati opangidwa ndi Eaton amagwiritsa ntchito kamangidwe kachindunji kuti chitsime chachikulu chikhale cholimba kwambiri. Choncho, pamene kupanikizika kwa katundu kumasintha, valavu sidzachitapo kanthu mwamsanga, kuchepetsa kusintha kwa kayendedwe kake ndikupereka kukhazikika kwa System.
