Chida choziziritsira cha screw chikayambitsidwa, chinthu choyamba kudziwa ndi ngati makina oziziritsira akuyenda bwino. Izi ndi mwachidule kufotokoza zomwe zili mkati ndi zizindikiro za ntchito yabwinobwino, ndipo izi ndi zongogwiritsidwa ntchito:
Madzi ozizira a condenser ayenera kukhala okwanira, kuthamanga kwa madzi kuyenera kukhala pamwamba pa 0.12MPa, ndipo kutentha kwa madzi sikuyenera kukhala kwakukulu kwambiri.
Pa ma screw refrigeration units, kuwerenga kwa pressure gauge ya pampu ya mafuta kuyenera kukhala 0.15~0.3MPa kuposa pressure ya utsi.
Mulimonse momwe zingakhalire, kutentha kwa mafuta sikuyenera kupitirira 70°C pa firiji ya fluorine ndi 65°C pa firiji ya ammonia, ndipo osachepera sayenera kupitirira 30°C. Munthawi yanthawi zonse yogwirira ntchito, mafuta opaka mafuta sayenera kupopera thovu (kupatula firiji ya fluorine).
Kutentha kwa mpweya wotulutsa mpweya mufiriji. Ammonia ndi R22 sizipitirira 135°C, ndipo ngati kutentha kwa mpweya wotulutsa mpweya kukukwera kwambiri, kudzakhala kochepa kwambiri poyerekeza ndi kuwala kwa mafuta oziziritsira (160°C), komwe sikwabwino pazida. Chifukwa chake, poganizira momwe zinthu zilili, kutentha kwa mpweya wotulutsa mpweya sikuyenera kukhala kwakukulu kwambiri, ndipo ngati kuli kokwera kwambiri, kuyenera kuyimitsidwa kuti mudziwe chifukwa chake.
Mlingo wa kuthamanga kwa madzi oundana. Izi zimatsimikiziridwa makamaka malinga ndi gwero la madzi, kapangidwe ka condenser ndi firiji yomwe imagwiritsidwa ntchito. Mlingo wa madzi mu thanki suyenera kutsika kuposa gawo limodzi mwa magawo atatu a chizindikiro cha madzi, ndipo mlingo wa mafuta mu crankcase suyenera kutsika kuposa mzere wopingasa wapakati pa zenera la chizindikiro.
Chitoliro chobweza mafuta chokha cha cholekanitsa mafuta cha fluorine chimakhala chachibadwa chikakhala chozizira komanso chotentha, ndipo nthawi yozizira ndi yotentha imakhala pafupifupi ola limodzi. Sipayenera kukhala kusiyana koonekeratu kwa kutentha musanayambe komanso mutatha fyuluta ya payipi yamadzimadzi. Sipayenera kukhala kuzizira, apo ayi idzatsekedwa. Firiji ya fluorine iyenera kukhala yozizira mbali yosalala komanso yotentha mbali youma. Malumikizidwe a dongosolo la fluorine sayenera kutulutsa mafuta, zomwe zikutanthauza kuti fluorine ikutuluka.
Mukakhudza condenser yopingasa panthawi yogwira ntchito, gawo lapamwamba liyenera kukhala lotentha ndipo gawo lapansi liyenera kukhala lozizira. Malo olumikizirana pakati pa ozizira ndi otentha ndi mulingo wamadzimadzi oziziritsa. Cholekanitsa mafuta chimatenthanso pamwamba, ndipo gawo lapansi silitentha kwambiri. Valavu yotetezera kapena valavu yodutsa mufiriji iyenera kumva yozizira kumapeto kwa kupanikizika kochepa, ngati sikuzizira, zikutanthauza kuti mpweya wothamanga kwambiri komanso wotsika umatuluka.
Pa nthawi yogwira ntchito, kuthamanga kwa nthunzi kuyenera kukhala kofanana ndi kuthamanga kwa mpweya wokoka mpweya, ndipo kuthamanga kwa mpweya wotuluka m'madzi kumapeto kwa mpweya wokoka mpweya kuyenera kukhala kofanana ndi kuthamanga kwa mpweya wokoka mpweya ndi kuthamanga kwa mpweya wolandira madzi. Ngati sichoncho, ndiye kuti sikwachilendo.
Pansi pa kuchuluka kwa madzi oyenda, payenera kukhala kusiyana kwa kutentha pakati pa malo olowera ndi otulukira madzi ozizira. Ngati palibe kusiyana kwa kutentha kapena kusiyana pang'ono kwa kutentha, zikutanthauza kuti pamwamba pa chipangizo chosinthira kutentha ndi pauve ndipo payenera kutsekedwa kuti chiyeretsedwe.
Firiji yokha iyenera kutsekedwa ndipo siyenera kutulutsa mafuta oziziritsa ndi mafuta odzola. Pa chisindikizo cha shaft, pamene mphamvu yoziziritsira yokhazikika ndi 12.6 × 1000 kJ/h, chisindikizo cha shaft chimaloledwa kukhala ndi mafuta ochepa otayikira, ndipo firiji yokhala ndi mphamvu yoziziritsira yokhazikika > 12.6 × 1000 kJ/h siloledwa kukhala ndi madontho osapitirira 10 a mafuta otayikira pa ola limodzi. Chodabwitsa n'chakuti, chisindikizo cha shaft cha chipangizo choziziritsira cha fluorine sichiyenera kukhala ndi mafuta otayikira.
Kutentha kwa chisindikizo cha shaft ndi bearing ya firiji sikuyenera kupitirira 70°C.
Chipale chofewa kapena mame pa valavu yokulitsa chimakhala chofanana, koma chipale chofewa sichiyenera kuwoneka pamalo olowera.
Nthawi yotumizira: Mar-13-2023