708-23-00921 VALVE YOTHANDIZA
Chiyambi cha valavu yachitetezo cha bulldozer1. Tanthauzo Bulldozer chitetezo valavu ndi kutsegula ndi kutseka kutsekereza valavu yowongolera yomwe imayikidwa mumayendedwe ofunikira a ma hydraulic system (monga zida zogwirira ntchito, chiwongolero, kuyenda, ndi zina). Pamene kupanikizika kwadongosolo kumadutsa mtengo wachitetezo wokonzedweratu, valavu imatseguka kuti ithetse kupanikizika; Pambuyo pake kupanikizika kumabwerera mwakale, valavu imatsekedwa kuti ikhalebe yogwira ntchito ya dongosolo.2. Mfundo yogwira ntchitoMfundo yaikulu ya ma valve otetezera imachokera pa "pressure force balance": Vavu imakhala ndi kasupe ndi valavu, ndipo mphamvu yowonjezera ya masika imafanana ndi kuthamanga kwa chitetezo (mtengo wokonzedweratu) wa dongosolo. mafuta a hydraulic pachimake valavu ndiakulu kuposa mphamvu yamasika, ndipo pachimake cha valve chimakankhidwa. Gawo la mafuta a hydraulic limatulutsidwanso ku thanki yamafuta kudzera mu valavu yotetezera (kuchepetsa kuthamanga), kuchititsa kuti kupanikizika kutsika pansi pamtengo wotetezeka, mphamvu ya masika imakankhira pachimake cha valve kuti itsekenso, ndipo dongosolo limabwerera ku mphamvu yachibadwa. Pamene kupanikizika kwa sing'anga mkati mwa zipangizo kapena payipi ikukwera ndikupitirira malire oikidwa, valavu yotetezera idzatseguka kuti ichepetse kupanikizika mwa kutulutsa sing'anga kunja kwa dongosolo, kupeŵa kuwonongeka kwa zipangizo kapena ngozi zachitetezo chifukwa cha kupanikizika kwambiri. Kapangidwe kake kaŵirikaŵiri kumaphatikizapo zigawo zikuluzikulu monga thupi la valve, core valve, ndi masika. Chigawo cha valve chimakwaniritsa kutsegulira ndi kutseka pansi pa mphamvu ya masika ndi kupanikizika kwa dongosolo, mofanana ndi "spring valve core" kuyendetsa galimoto yama valve otetezera chitetezo.
Kugwiritsa ntchito valavu yachitetezo cha bulldozer
Dongosolo la hydraulic la bulldozer ndi "malo amphamvu" pakugwira ntchito ndi kuyenda, kuphimba zida zogwirira ntchito (bulldozer, bulldozer), chiwongolero, njira yoyenda, etc. Ma valve otetezeka amagwira ntchito yofunika kwambiri yoteteza machitidwe awa:
1. Makina ogwiritsira ntchito makina a hydraulic (mawonekedwe ogwiritsira ntchito)
Tsamba la bulldozer la bulldozer (kukweza, kupendekeka) ndi chipangizo chomasula (kukweza, kulowa m'nthaka) zimadalira masilinda a hydraulic kuti aziyendetsa, ndipo pogwira ntchito, katundu wadzidzidzi (monga ngati bulldozer kukumana ndi miyala yolimba kapena chipangizo chomangirira kukakamira) kungayambitse kupanikizika kwadzidzidzi mkati.
Vavu yachitetezo imayikidwa mu gawo lolowera mafuta la silinda yamafuta. Pamene kupanikizika kumadutsa mtengo wa chitetezo (kawirikawiri 1.1 - 1.2 nthawi zovomerezeka za dongosolo), valavu imatsegula kuti itulutse mafuta othamanga kwambiri kumbuyo kwa thanki ya mafuta, kupewa kuwonongeka kapena kuphulika kwa mbiya ya cylinder ndi pisitoni ndodo chifukwa chodzaza, ndi kuteteza pampu ya hydraulic yomwe imayendetsa kuwonongeka kwapampu ya mafuta (kulepheretsa kupopera kwapope).
Chiwongolero cha hydraulic system
Chiwongolero cha bulldozer chimadalira masilinda a hydraulic (kapena ma hydraulic motors) kuyendetsa liwiro losiyanitsira njanji. Ngati njanji zimatsekeka mwadzidzidzi panthawi yowongolera (monga kumamatira m'matope kapena kugundana ndi zopinga), kupanikizika mumayendedwe owongolera mafuta kumawonjezeka nthawi yomweyo.
Valve yachitetezo pamayendedwe owongolera imatha kuchepetsa kuthamanga, kuteteza silinda yowongoleredwa, pampu yowongolera, kapena valavu yowongolera kuti isalephere chifukwa cha kupsyinjika, kuonetsetsa kudalirika kwa chiwongolero, ndikupewa kuopsa kwa "kukakamira ndi kusawongolera"
. Kuyenda hydraulic system
Ma bulldozer ena amagwiritsa ntchito hydraulic drive poyenda (monga ma hydraulic bulldozers), ndipo mota yoyenda imayendetsa njanji kuti izungulire mumafuta a hydraulic. Ngati njanjiyo imakakamira ndi miyala kapena katunduyo ndi waukulu kwambiri pokwera, kupanikizika kwa kayendedwe ka mafuta kumawonjezeka mosadziwika bwino.
Vavu yachitetezo cha mayendedwe oyenda tsopano yatsegulidwa kuti muchepetse kuthamanga, kuteteza mota yoyenda, pampu ya hydraulic, ndi mapaipi apamwamba-kuletsa kusweka kwa zida zamagalimoto, kuphulika kwa mapaipi, ndi zolakwika zina chifukwa chodzaza kwambiri. General Industrial Value of Safety Valves
Ma valve otetezera amagwiritsidwa ntchito kwambiri m'magawo monga ma boilers, zotengera zopondereza, makina a nthunzi, ndi zina zambiri, mwachitsanzo:
Nthunzi: imayikidwa pansi pa ma valve ochepetsera kuthamanga, matanki amoto, zipangizo zosungirako kutentha, ndi zipangizo zina kuti ateteze kuphulika komwe kumachitika chifukwa cha kupsyinjika.
Makampani apadera: Kutentha kwamafuta opangira mafuta kumatenga valavu yamtundu wa A40 kuti igwirizane ndi kutentha kwakukulu kwa mafuta ndi gasi pamwamba pa madigiri 350, ndipo mpweya wa compressor umateteza chitetezo cha thanki yosonkhanitsira mpweya kudzera mu valve yotetezera. Njira yayikulu ya "automatic overpressure relief recovery closure" ndi chitsimikizo chapadziko lonse lapansi chachitetezo cha machitidwe a mafakitale.
Valavu yachitetezo cha bulldozer ndi "chitetezo chachitetezo" cha hydraulic system, chomwe chimalepheretsa kuchulukira ndikuwongolera kukakamiza molondola. Kugwiritsa ntchito kwake kumayenda kudzera pamakina oyambira monga chida chogwirira ntchito, chiwongolero, ndikuyenda, ndipo ndi gawo lofunikira pakuwonetsetsa kuti ma bulldozer akuyenda bwino komanso otetezeka. Pogwiritsira ntchito, ndikofunikira kuyang'ana nthawi zonse kuyika kwapanikizidwe ndi kusindikiza kwa valve yotetezera kuti muwonetsetse kukhudzika kwake ndi kudalirika kwake.
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