Kodi mtengo wa CV umatanthauza chiyani? Momwe mungasankhire valavu yowongolera ndi mtengo wa Cv?

Invalavuengineering, mtengo wa Cv (Flow Coefficient) wowongoleravalavuimatanthawuza kuchuluka kwa kuthamanga kwa voliyumu kapena kuthamanga kwa misala ya sing'anga ya chitoliro kudzera mu valavu pa nthawi ya unit ndi pansi pa mayesero pamene chitolirocho chimasungidwa nthawi zonse. Ndiko kuti, mphamvu yothamanga ya valve.

The apamwamba otaya coefficient mtengo, m'munsi kuthamanga kutaya kutaya madzimadzi akuyenda kudzeravalavu.

Mtengo wa Cv wa valve uyenera kutsimikiziridwa ndi kuyesa ndi kuwerengera.

CV ndimtengondi gawo lofunikira laukadaulo lomwe limayesa kuthamanga kwa valavu yowongolera pamikhalidwe inayake. Mtengo wa CV sumangowonetsa momwe valavu imagwirira ntchito, komanso imagwirizana mwachindunji ndi mapangidwe ndi magwiridwe antchito a dongosolo lowongolera madzi.

Tanthauzoli nthawi zambiri limachokera pazikhalidwe zotsatirazi: avalavuimatsegulidwa kwathunthu, kusiyana kwapakati ndi 1 lb / in² (kapena 7KPa) kumapeto, ndipo madzimadzi ndi 60 ° F (15.6 ° C) a madzi oyera, pomwe kuchuluka kwa madzi (mu magaloni a US) kudutsa mu valve pamphindi ndi mtengo wa Cv wa valve. Zindikirani kuti mayendedwe oyenda ku China nthawi zambiri amatanthauzidwa mu metric system, ndi chizindikiro cha Kv, ndipo ubale ndi mtengo wa Cv ndi Cv=1.156Kv.

Momwe mungadziwire mtundu wa valavu ndi mtengo wa Cv

1. Werengani mtengo wa CV womwe mukufuna:

Malingana ndi zofunikira zenizeni za kayendedwe ka madzimadzi, monga kutuluka, kuthamanga kwa kusiyana, pakati ndi zina, mtengo wa Cv wofunikira umawerengedwera pogwiritsa ntchito ndondomeko yofanana kapena mapulogalamu. Sitepe iyi imaganizira zinthu monga thupi katundu wa madzimadzi (mwachitsanzo, mamasukidwe akayendedwe, kachulukidwe), ntchito zinthu (mwachitsanzo, kutentha, kuthamanga), ndi malo valavu.

2. Sankhani valavu yoyenera:

Malingana ndi mtengo wa Cv womwe ukufunidwa ndi mtengo wa Cv wovotera wa valve, valavu yoyenera imasankhidwa. Mtengo wa Cv wa valavu yosankhidwa uyenera kukhala wofanana kapena wokulirapo pang'ono kuposa mtengo wa Cv wofunikira kuti zitsimikizire kuti valavu ikhoza kukwaniritsa zofunikira zenizeni. Panthawi imodzimodziyo, m'pofunikanso kulingalira zinthu zina monga zakuthupi, kapangidwe kake, ntchito yosindikiza, ndi njira yogwiritsira ntchito valve kuti zitsimikizire kuti ntchito yonse ya valve ikukwaniritsa zofunikira za dongosolo.

3. Kutsimikizira ndi Kusintha:

Pambuyo kusankha koyamba kwavalavucaliber, kutsimikizira kofunikira ndikusintha kuyenera kuchitika. Izi zikuphatikizapo kutsimikizira kuti kayendedwe ka valve kakukwaniritsa zofunikira za dongosolo pogwiritsa ntchito mawerengedwe oyerekezera kapena kuyesa zenizeni. Ngati kupatuka kwakukulu kumapezeka, pangakhale kofunikira kuwerengeranso mtengo wa Cv kapena kusintha ma valve awiri.

Chidule

M'makina opangira madzi a nyumba, ngati valavu yolamulira sichikukwaniritsa zofunikira za CV, mpope wamadzi ukhoza kuyamba ndikuyimitsa kawirikawiri kapena kuthamanga pamtunda nthawi zonse. Sikuti izi ndizowononga mphamvu yamagetsi, koma chifukwa cha kusinthasintha kwapang'onopang'ono, kungayambitse kulumikiza mapaipi otayirira, kutayikira, komanso kungayambitse kuwonongeka kwa mpope chifukwa cha kuchuluka kwa nthawi yaitali.

Mwachidule, mtengo wa Cv wa valve yolamulira ndi chizindikiro chofunikira kuti muyese mphamvu yake yoyenda. Mwa kuwerengera molondola mtengo wa Cv ndikuzindikira mtundu woyenerera wa valve potengera izo, kukhazikika ndi mphamvu ya kayendedwe ka madzimadzi kumatha kutsimikiziridwa. Choncho, posankha ma valve, mapangidwe a dongosolo ndi kukhathamiritsa kwa ntchito, chidwi chonse chiyenera kulipidwa pa kuwerengera ndi kugwiritsa ntchito mtengo wa Cv.

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