Mu makina oyendetsera magetsi, kuthamanga kwa mpweya ndi chinthu chofunikira kwambiri chomwe chimatsimikizira ngati zida zitha kugwira ntchito bwino komanso mosamala. Kuthamanga kwambiri kungayambitse kuphulika kwa mapaipi ndi kuwonongeka kwa zigawo, pomwe kuthamanga kochepa kwambiri kungayambitse mphamvu zosakwanira za zida ndi kulephera kugwira ntchito. Komabe, valavu yowongolera kuthamanga kwa mpweya imagwira ntchito ngati "woteteza chitetezo" chomwe chimasunga kuthamanga kwa mpweya m'makina oyendetsera magetsi. Kupatula "wowongolera kuthamanga kwa mpweya" wa makina oyendetsera magetsi, mavalavu owongolera kuthamanga kwa mpweya amapereka zinthu zambiri - chitetezo, magwiridwe antchito, komanso kusunga mphamvu - ku zida zamafakitale kudzera mukuwongolera kolondola, zomwe zimapangitsa kuti zikhale zofunikira kwambiri m'minda monga makina omanga ndi makina opangira malasha.
I. Ntchito Zoyambira: Kuteteza "Malire Opanikizika" a Machitidwe a Hydraulic kuti apewe Ngozi Zachitetezo ndi Kutayika kwa Zipangizo
Pakagwira ntchito makina a hydraulic, kuthamanga kwa magazi kumasintha chifukwa cha zinthu monga kusintha kwa katundu ndi kusintha kwa kayendedwe ka madzi. Popanda kulamulira bwino, kumatha kupitirira malire a kulekerera kwa zigawo kapena mapaipi. Ntchito yayikulu ya ma valve owongolera kuthamanga kwa magazi ndikukhazikitsa "malire a kuthamanga kwa magazi" kwa makinawo. Kudzera mu kuyang'anira nthawi yeniyeni komanso kusintha kwa mphamvu, amaonetsetsa kuti kuthamanga kwa magazi kumakhalabe pamalo otetezeka, makamaka kupewa mavuto awiri ofunikira:
1. Chitetezo Chodzaza Zinthu: Kupewa Kuwonongeka Kwambiri ndi Kukulitsa Moyo wa Zipangizo
Pamene katundu wadzidzidzi wasintha (monga, chotsukira chomwe chikunyamula katundu wolemera mwadzidzidzi) kapena kutsekeka kwa spool kumayambitsa kukwera kwamphamvu kwa kuthamanga kwa madzi mu dongosolo la hydraulic, valavu yowongolera kuthamanga imayankha nthawi yomweyo kuti itulutse kapena kudula kuthamanga kochulukirapo. Tengani valavu yochepetsera kuthamanga kwa madzi ya Series 201 Direct-Acting Relief monga chitsanzo: imakhala ndi kuthamanga kwakukulu kogwira ntchito mpaka 350 bar. Kuthamanga kwa madzi mukafika pamtengo wokhazikika, spool imatseguka mkati mwa masekondi 0.05, kutembenuza mafuta ochulukirapo a hydraulic kubwerera ku thanki yamafuta ndikuletsa kuphulika kwa silinda kapena mapaipi chifukwa cha kuthamanga kwambiri. Deta ikuwonetsa kuti makina a hydraulic okhala ndi mavalavu owongolera kuthamanga amawona kuchepa kwa 60% kwa kuwonongeka kwa zigawo ndi kukulitsa kwa 30% kapena kuposerapo pa moyo wonse wa zida.
2. Kukhazikika kwa Kupanikizika: Kuonetsetsa Kuti Mphamvu Imakhala Yokhazikika Ndipo Kupewa Kulephera kwa Ntchito
Mu zochitika zolondola za hydraulic (monga ma port cranes lifting containers), kusinthasintha kwa kuthamanga kwa mpweya kungayambitse kuti zipangizo "zigundike" kapena "zidumphe kwambiri" - kupanikizika kosakwanira kumachepetsa kukweza kwa boom, pomwe kupanikizika kwambiri kungayambitse kugwa kwadzidzidzi kwa mbedza. Valve Yochepetsa Kupanikizika ya Series 33JY imatha kuchepetsa kuthamanga kwa mpweya kwa dongosololi kufika pamtengo wokhazikika (kusintha: 3.5 bar–315 bar) ndi cholakwika cha kukhazikika kwa kuthamanga kwa mpweya cha ≤2%. Ngakhale pamene kuthamanga kwa mpweya kumasiyana pakati pa 0–160 L/min, kusinthasintha kwa kuthamanga kwa mpweya kumayendetsedwa mkati mwa bar imodzi, kuonetsetsa kuti zipangizo zikugwira ntchito bwino komanso molondola.
II. Mtengo Waukulu: Kupitirira "Kulamulira Kupanikizika" - Kukonza Magwiridwe Antchito ndi Ndalama za Dongosolo
Kusankha ma valve owongolera kuthamanga sikuti kungokwaniritsa "zofunikira zachitetezo"; kumawonjezera mphamvu zama hydraulic system m'njira zitatu—kugwiritsa ntchito bwino, kusunga mphamvu, komanso kusinthasintha—kuthandiza mabizinesi kuchepetsa ndalama zonse zogwirira ntchito:
1. Kupititsa patsogolo Kugwira Ntchito Bwino: Kusinthana ndi Mikhalidwe Yambiri Yogwirira Ntchito ndi Kuchepetsa Nthawi Yoyambitsa Ntchito
Zipangizo zamafakitale nthawi zambiri zimafunika kusinthana pakati pa mikhalidwe yosiyanasiyana yogwirira ntchito (monga, chonyamulira nthawi zina chimagwira ntchito yopepuka yosuntha nthaka ndipo nthawi zina chimatha kufoshola kwambiri). Machitidwe achikhalidwe a hydraulic amafuna kusintha kwa kuthamanga kwa dzanja, komwe kumatenga nthawi yambiri komanso kumakhala ndi zolakwika. Komabe, ma valve owongolera kuthamanga amathandizira "kulamulira kuthamanga kokha" panthawi yosintha momwe zinthu zilili pokhazikitsa magawo a kuthamanga. Mwachitsanzo, Series 231L Pilot-Operated Relief Valve imathandizira kusintha kwa kuthamanga kwa mitundu yosiyanasiyana (15 bar–350 bar). Ndi kusintha kwa soketi ya handguard kapena hexagon, ogwiritsa ntchito amatha kusintha kuthamanga mkati mwa mphindi imodzi popanda kuyimitsa makina kapena kusokoneza mapaipi, zomwe zimawonjezera magwiridwe antchito ndi 25%.
Kuphatikiza apo, kapangidwe ka "kusinthana" ka mavavu owongolera kuthamanga kumawonjezera magwiridwe antchito. Mndandanda wonse wazinthu umagwiritsa ntchito mitundu yokhazikika yoyikamo (monga T08-2, T10-2), zomwe zimathandiza kusintha mwachindunji zinthu zofanana popanda kusintha kapangidwe ka valavu. Izi zimachepetsa nthawi yogwirira ntchito ndi 40% panthawi yokonza kapena kukweza zida.
2. Kuchepetsa Ndalama Zogwiritsa Ntchito Mphamvu: Kuchepetsa Kugwiritsa Ntchito Mphamvu Zosafunikira ndi Kukwaniritsa Zosowa Zosunga Mphamvu
Kugwiritsa ntchito mphamvu kwa makina oyeretsera madzi kumakhudzana mwachindunji ndi kupanikizika—pamene kupanikizika kwa makina kukuposa zofunikira zenizeni, kupanikizika kochulukirapo kumasanduka kugwiritsa ntchito mphamvu kosafunikira kudzera mu kupanga kutentha ndi kupopera, komwe sikungowononga mphamvu zokha komanso kumakweza kutentha kwa mafuta a makinawo. Ma valve owongolera kupanikizika amapewa zinyalala zotere mwa “kupereka kupanikizika pakafunika.” Mwachitsanzo, Series 221L Load Control Valve imasintha kupanikizika kutengera katundu: chidebe choyeretsera madzi chikatsitsidwa, gulu la ma valve limachepetsa kupanikizika mpaka pansi pa mipiringidzo 50; pamene lili ndi katundu wolemera, limawonjezera kupanikizika kufika pa mipiringidzo 240. Poyerekeza ndi makina oyeretsera okhazikika, izi zimachepetsa kugwiritsa ntchito mphamvu ndi 15%–20%.
Pa zida zatsopano zamagetsi zamagetsi (monga ma excavator amagetsi), mphamvu yosunga mphamvu ya ma valve owongolera kuthamanga kwa mphamvu ndi yofunika kwambiri. Valve Yochepetsa Mphamvu ya Electro-Proportional 23BJ-05 imatha kuwongolera kuthamanga kwa mphamvu kudzera mu zizindikiro zamagetsi ndikugwirizana ndi makina osinthira ma frequency a mota kuti ikwaniritse "mphamvu yoyendera mphamvu yamagetsi", ndikuwonjezera moyo wa batri wa makina amagetsi amagetsi ndi 25%.
3. Kusinthana ndi Mikhalidwe Yovuta Yogwirira Ntchito: Kupirira Malo Ovuta Kwambiri ndi Kuonetsetsa Kuti Ntchito Yakhazikika
Zipangizo zamafakitale nthawi zambiri zimagwira ntchito m'malo ovuta—makina omanga amapirira kugwedezeka, kutentha kwambiri komanso kotsika; makina opangira malasha amathana ndi fumbi ndi chinyezi; makina olowera m'madoko amalimbana ndi dzimbiri lopopera mchere. Ma valve owongolera kuthamanga amakonzedwa bwino muzinthu ndi kapangidwe kake kuti agwirizane ndi zinthu zosiyanasiyana zovuta:
Kukana Nyengo: Zipangizo zotsekera zimaphatikizapo mphira wa nitrile (N, yoyenera nyengo yabwinobwino -20°C–80°C) ndi Viton (V, yoyenera kutentha kwambiri -40°C–120°C komanso malo owononga kwambiri). M'migodi ya malasha yapansi panthaka kapena malo opopera mchere, nthawi yogwira ntchito ya zisindikizo imawirikiza kawiri.
Zoletsa Kusokoneza Kapangidwe: Ma valve opangidwa ndi chitsulo cha kaboni champhamvu kwambiri, chokhala ndi mankhwala oletsa dzimbiri pamwamba pake. Kuphatikiza ndi ma spools olondola-pansi, kulondola kwa kulamulira kuthamanga kumakhalabe kokhazikika ngakhale pamakina omanga okhala ndi kugwedezeka kwa 10–50 Hz.
Kulimba Koletsa Kuipitsa: Zinthu zosefera zomangidwa bwino kwambiri (20 μm) zimaletsa fumbi ndi zinyalala zachitsulo kuti zisalowe m'mipata ya spool, zomwe zimachepetsa kuchuluka kwa kulephera kwa magulu a ma valve ndi 50% mu makina otumizira ma scraper a migodi ya malasha omwe ali ndi fumbi lochuluka.
III. Zosowa Zapadera: "Mayankho Oyendetsera Kupanikizika Opangidwa Mwamakonda" a Makampani Osiyanasiyana Kuti Athetse Mavuto Aakulu
Kufunika kwa ma valve owongolera kuthamanga kwa magazi kumaonekeranso mu kuthekera kwawo kupereka njira zowongolera kuthamanga kwa magazi zomwe zimagwiritsidwa ntchito pa zosowa zapadera za mafakitale osiyanasiyana, pothana ndi mavuto akuluakulu m'magawo osiyanasiyana:
1. Makina Omanga: Kuyankha Kusintha kwa Katundu Mwadzidzidzi ndi Kuonetsetsa Chitetezo cha Ntchito
Pa nthawi yogwira ntchito ya ma excavator ndi ma loader, katundu amasintha nthawi yeniyeni ndi ngodya ya chidebe ndi kuuma kwa nthaka, zomwe zimapangitsa kuti kuthamanga kwa mpweya kusinthasintha pafupipafupi. Valavu ya Series 22YL Direct-Acting Relief imagwiritsa ntchito kapangidwe ka valavu yotseguka yokhala ndi liwiro loyankha kuthamanga kwa masekondi 0.03, zomwe zimathandiza kuti munthu ayankhe mwachangu kusintha kwadzidzidzi kwa katundu. Kapangidwe kake kotsutsana ndi kusintha kwa kutentha (code "C") kamaletsa kutayika kwa kuthamanga kwa mpweya komwe kumachitika chifukwa chokhudza chosinthira mwangozi panthawi yogwira ntchito, kupewa ngozi zachitetezo monga kugwa mwadzidzidzi kwa mpweya ndi kutsika kwa chidebe.
2. Makina Opangira Malasha: Kuphulika ndi Kukana Kuipitsa Malo Ovuta a Pansi pa Dziko
Migodi ya malasha yapansi panthaka ili ndi zinthu zoopsa monga mpweya, fumbi, ndi madzi, zomwe zimapangitsa kuti pakhale chitetezo ndi kukana kuipitsidwa kwa zinthu zamagetsi. Valavu Yotsutsana ndi Kulemera ya Series 30PH (Valavu Yowongolera Kulemera) ili ndi kapangidwe ka valavu yotsutsana ndi static yomwe imagwirizana ndi malamulo achitetezo cha mgodi wa malasha. Zisindikizo za Viton zimapirira chinyezi cha pansi panthaka, kuteteza kutayikira kwa mafuta a hydraulic chifukwa cha kulephera kwa chisindikizo. Pakadali pano, gulu la mavalavu lili ndi chivundikiro cha fumbi kuti lisalowe mu makina osinthira, ndikuwonetsetsa kuti maola 3,000 a ntchito yopitilira pansi panthaka yopanda mavuto.
3. Makina Oyendera: Kulamulira Kupanikizika Kwambiri Kokhazikika Kuti Muwongolere Kukweza ndi Kutsitsa Mphamvu
Ma doko a cranes amatsiriza ntchito zambirimbiri zonyamula/kutsitsa makontena tsiku lililonse, zomwe zimafuna ma valve owongolera kuthamanga kuti asunge bata panthawi yoyenda pafupipafupi kwambiri. Valavu Yothandizira Yoyendetsa Ma Pilot ya Series 231 imagwiritsa ntchito kapangidwe ka magawo awiri, ndipo valavu yayikulu ndi valavu yoyendetsa zimagwira ntchito mogwirizana. Ngakhale pansi pa mikhalidwe yogwirira ntchito pafupipafupi kwambiri (kuyamba/kuima 20 pamphindi), kusinthasintha kwa kuthamanga kumayendetsedwa mkati mwa mipiringidzo 5. Kuphatikiza ndi kapangidwe kake kakukulu (kuthamanga kwakukulu: 300 L/mphindi), imakwaniritsa kufunikira kwa kukweza ma cranes mwachangu, ndikuwonjezera mphamvu yokweza ndi kutsitsa ndi 15%.
4. Zida za Makina Olondola: Kulamulira Kupanikizika kwa Micron-Level Kuti Mutsimikizire Kulondola kwa Machining
Mu zida zamakina zolondola zoyendetsedwa ndi hydraulically (monga makina opindika a CNC), kulondola kwa kupanikizika kumatsimikiza mwachindunji kulakwitsa kwa magawo a ntchito—kupotoka kwa kupanikizika kwa 0.5 bar kungayambitse kulakwitsa kwa ngodya yopindika ya 1°. Valve Yochepetsa ya 23BJ-05 Electro-Proportional imathandizira kusintha kwa kupanikizika kwa 0.1 bar, ndikuwongolera kupanikizika kolunjika kudzera mu zizindikiro zamagetsi. Kuphatikiza ndi kulondola kwa kusefa kwa 10 μm, kumakwaniritsa zofunikira za kupanikizika kolondola kwa zida zamakina, ndikuwonjezera kuchuluka kwa magawo opangidwa ndi makina kufika pa 99.5%.
Kuyambira kukhala "mzere woyambira wodzitetezera" pa chitetezo cha makina, kupita ku "chida chowonjezera phindu" chowongolera magwiridwe antchito ndikuchepetsa kugwiritsa ntchito mphamvu, komanso kupita ku "njira yosinthidwa" yosinthira ku mafakitale osiyanasiyana, kufunika kwa ma valavu owongolera kuthamanga kumadutsa moyo wonse wa makina a hydraulic. Kwa makampani opanga mafakitale omwe akufuna chitetezo, magwiridwe antchito, komanso kusunga mphamvu, kusankha ma valavu owongolera kuthamanga ndi kapangidwe katsopano komanso kupanga zinthu zopanda mphamvu (monga zomwe tatchulazi) sikuti kumangopatsa makina a hydraulic "chitetezo" komanso kumapereka chithandizo chachikulu pakukweza magwiridwe antchito a zida ndikuwongolera mtengo. Ichi ndichifukwa chake ma valavu owongolera kuthamanga akhala "ofunikira" pamakina a hydraulic.
Nthawi yotumizira: Sep-12-2025