Vavu yachitetezo cha Excavator PC200-8 PC220-8 valve 723-90-76101

Mfundo yoyendetsera ntchito yotsitsa: valavu yotsitsa imapangidwa ndi valavu yothandizira ndi valavu yowunika. Pamene kupanikizika kwa dongosolo kumafika pakutsegulira kwa valve yothandizira, valve yothandizira imatsegulidwa ndipo pampu imatulutsidwa. Pamene kupanikizika kwa dongosolo kumatsikira ku kutsekeka kwa valve yothandizira, valve yothandizira imatseka ndipo mpope imanyamula katundu mu dongosolo.
Valavu yotsitsa ndi valavu yomwe imatha kutsitsa pampu ya hydraulic pansi pamikhalidwe ina. Valve yotsitsa nthawi zambiri imakhala ndi valve yothandizira yokhala ndi ma valve awiri (kawirikawiri valavu ya solenoid), yomwe imagwiritsidwa ntchito poika kupanikizika kwakukulu kwa dongosolo (pampu yamafuta) pamene sichikutulutsidwa. Mafuta opanikizika akatulutsidwa (kutembenuka kwa njira ziwiri za valve), mafuta opanikizika amabwereranso ku thanki, ndipo kupanikizika kwa pampu yamafuta kumachepetsedwa mpaka pafupifupi zero, kuti akwaniritse kuwongolera kwa loop ndikuwongolera moyo wa mpope mafuta ndi kuchepetsa kugwiritsa ntchito mphamvu.
Kukhala wa lupu lophatikizidwa mu lupu. Valavu yochepetsera mphamvu imagwiritsidwa ntchito kuti isinthe kupanikizika komwe kumafunikira ndi actuator, yomwe ili mndandanda wamtundu ndipo nthawi zambiri sungagwiritsidwe ntchito mosiyana.

Zambiri:
Mtundu wa valve yotsitsa:
Mtundu wolowera
Njira yotsitsa ndi valavu yothamanga imakhazikitsidwa mosiyana. Mukatsitsa, spool iliyonse imakhala yosalowerera ndale, ndipo mafuta ochokera kugwero lamafuta amatulutsidwanso ku thanki kudzera munjira yapadera yamafuta kudzera mu valavu iliyonse, ndipo ngalande yamafuta yotsitsa imadutsa mu valve iliyonse yobwerera. Pamene imodzi mwa ma valve ikugwira ntchito (ndiko kuti, njira yotsitsa mafuta imadulidwa), mafuta ochokera ku gwero la mafuta amalowa mu actuator yoyendetsedwa kuchokera ku valavu yobwerera pamsewu, ndipo kupanikizika kogwira ntchito kumachepetsedwa ndi valve yothamanga mu chithunzi.
Mtundu wotsitsa
Valve yotsitsa ndi valavu yotetezera imaphatikizidwa kuti ipange valve yothamanga yoyendetsa ndege, yomwe imakhala yotsegula komanso yotetezera chitetezo, ndipo nthawi zina imakhala yowonjezera. Pakutsitsa, njira yamafuta yowongolera imadutsa mu valve iliyonse yolowera, yomwe ili yofanana ndi njira yotsitsa mafuta.