Tattaunawar ilimin malam buɗe ido

A cikin 30s, damalam buɗe idoAn ƙirƙira shi a Amurka, an gabatar da shi ga Japan a cikin 50s, kuma an yi amfani da shi sosai a Japan a cikin 60s, kuma an haɓaka shi a China bayan 70s. A halin yanzu, bawul ɗin malam buɗe ido sama da DN300 mm a duniya a hankali sun maye gurbin bawul ɗin ƙofar. Idan aka kwatanta dabakin kofa, Bawul ɗin malam buɗe ido suna da ɗan gajeren lokacin buɗewa da rufewa, ƙaramin ƙarfin aiki, ƙaramin sarari shigarwa da nauyi mai nauyi. Ɗaukar DN1000 a matsayin misali, bawul ɗin malam buɗe ido yana kusan 2T, kuma bawul ɗin ƙofar yana kusan 3.5T, kuma bawul ɗin malam buɗe ido yana da sauƙin haɗuwa tare da na'urorin tuƙi daban-daban, tare da kyakkyawan karko da aminci.

Rashin hasara na hatimin robamalam buɗe idoshi ne idan aka yi amfani da shi wajen tsukewa, cavitation zai faru saboda rashin amfani da shi, wanda zai sa kujerar roba ta bare ta lalace. A cikin 'yan shekarun nan, kasar Sin ta samar da bawul din malam buɗe ido da aka rufe da ƙarfe, kuma a cikin 'yan shekarun nan, Japan ta ƙera bawul ɗin malam buɗe ido tare da juriya na cavitation, ƙarancin girgiza da ƙaranci.

Rayuwar sabis na wurin zama na gaba ɗaya shine shekaru 15-20 don roba da shekaru 80-90 don ƙarfe a ƙarƙashin yanayin al'ada. Duk da haka, yadda za a zabi daidai ya dogara da bukatun yanayin aiki.

Dangantaka tsakanin budewar amalam buɗe idokuma madaidaicin magudanar ruwa ya kasance madaidaiciya kuma daidai gwargwado. Idan aka yi amfani da shi wajen sarrafa magudanar ruwa, yanayin tafiyarsa kuma yana da alaƙa da juriya na bututun, kamar diamita da nau'in bawul ɗin da aka sanya a cikin bututun guda biyu iri ɗaya ne, kuma adadin asarar bututun ya bambanta, kuma adadin kwararar bututun zai bambanta sosai.

Idan bawul ɗin yana cikin yanayin babban ƙwanƙwasa, bayan farantin bawul ɗin yana da haɗari ga cavitation, kuma akwai yuwuwar lalata bawul ɗin, don haka ana amfani da shi gabaɗaya a waje 15 °.

Lokacin da bawul ɗin malam buɗe ido yana tsakiyar buɗewa, siffar buɗewa ta kafa tabawuljiki da gaban ƙarshen farantin malam buɗe ido yana a tsakiya a kan madaidaicin valve, kuma bangarorin biyu sun samar da jihohi daban-daban, ƙarshen gaban farantin malam buɗe ido a gefe ɗaya yana motsawa tare da jagorancin ruwa mai gudana, ɗayan kuma yana motsawa akan hanyar ruwa mai gudana, saboda haka, bawul ɗin a gefe ɗaya kuma farantin bawul ɗin yana samar da bututun ƙarfe mai siffa buɗewa, ɗayan gefen kuma yana kama da buɗaɗɗen nau'in bututun ƙarfe, gefen gefen yana da sauri fiye da buɗaɗɗen gefen rami, gefen rami da sauri fiye da rami. za a haifar da mummunan matsa lamba a ƙarƙashin bawul ɗin gefen maƙura, kuma hatimin roba sau da yawa ya faɗi.

Aiki karfin juyi na malam buɗe ido, saboda daban-daban bude da bude shugabanci na bawul, da darajar ne daban-daban, da kuma a kwance bawul bawul, musamman ma babban diamita bawul, saboda da ruwa zurfin, da karfin juyi samar da bambanci tsakanin babba da ƙananan shugaban bawul shaft ba za a iya watsi da. Bugu da ƙari, lokacin da aka shigar da gwiwar hannu a gefen shiga na bawul, an samar da motsi na karkatarwa, kuma karfin yana ƙaruwa. Lokacin da bawul ɗin ya kasance a tsakiyar buɗewa, tsarin aiki yana buƙatar zama mai kulle kansa saboda aikin motsi na ruwa.