Positive displacement flowmeter

Positive displacement flowmeter-PD Mamita

Zikafika pakuyezera kuchuluka kwa kuchuluka kwa ma volumetric azinthu zamadzimadzi, palibe chomwe chimagwira ntchito bwino kuposa ma flow metre omwe amagwiritsidwa ntchito mosiyanasiyana mokhudzana ndi magawo osiyanasiyana.Positive displacement flowmeter yomwe ilipo pamsika imagwiritsidwa ntchito pazinthu zingapo zapamwamba, ndipo iliyonse ili ndi maubwino osiyanasiyana, magwiridwe antchito, mawonekedwe, makina, ndi mawonekedwe.

Positive displacement Flow metres ndi mitundu ya ma flowmeters omwe ali oyenera kuyeza madzi a viscous fluid.Izi zimawonedwanso kuti ndizoyenera kugwiritsa ntchito zomwe zimafuna kugwiritsa ntchito makina osavuta amakina.Nthawi zambiri, mita yoyenda bwino imakhala ndi chipinda kapena pabowo lomwe limalepheretsa kuyenda.Chida chozungulira kapena chobwerezabwereza chimakhala mkati mwa chipindacho kuti chipange maphukusi osasunthika kuchokera kumadzimadzi oyenda.Kupyolera mu mayunitsi a mita ya PD, zakumwa zimagawika m'magulu owerengeka omwe amawerengedwanso ndi kaundula wolumikizira.Popeza kuchulukitsidwa kulikonse kumayimira voliyumu yosiyana, mitundu iyi ya mita imagwiritsidwa ntchito kwambiri pazolinga zowerengera zokha komanso zowerengera.

Kodi Positive Displacement Flow Meter ndi chiyani?

Kutanthawuza chipangizo, kodi Positive Displacement flow mita (PD) ndi chiyani?- Meta yamakina yomwe imagwiritsidwa ntchito bwino pazosakaza zosawononga komanso zoyera.Pokhala wokhoza kuyeza madzi ambiri omwe amaphatikizapo ngakhale omwe ali ndi ma viscosities apamwamba, mita yothamanga iyi imabwera ndi ubwino wambiri.

Zomwe zimatchedwanso ma workhorses muzoyezera zoyenda, chipangizochi choyezera kuchuluka kwa madzi chimayesa kuthamanga kwa chinthu chamadzimadzi pochilola kuti chizidutsa pang'onopang'ono.Akagwiritsidwa ntchito m'mafakitale, ma mita oyenda a PD amadziwika chifukwa cha kuthekera kwawo kuyeza kuchuluka kwamadzimadzi kovutirapo komanso kofunikira komanso molondola komanso mosavuta.

Positive Displacement (PD) Flow mita ndi zida zoyezera kuchuluka kwa ma volumetric zomwe zimayezera kuyenda podutsa kuchuluka kwamadzimadzi nthawi zonse.Mamita otaya a PD ndi zida zolondola zomwe zida zake zosuntha zamkati zimatsekedwa motsatana ndi kuchuluka kwamadzimadzi kumayenda mu mita yotuluka.

Positive Displacement Meter ndi mtundu wa mita yotuluka yomwe imafuna madzimadzi kuti asunthire mbali zake mu mita kuti azitha kuyeza kuthamanga.Positive displacement (PD) flow meters amayezera kuchuluka kwa madzimadzi oyenda kapena gasi pogawa zowulutsa m'ma voliyumu osasunthika, okhala ndi mita (zowonjezera zomaliza kapena kuchuluka kwamadzimadzi).

Kodi Positive Displacement Flow Meter Imagwira Ntchito Motani?

Fanizo lofunikira lingakhale kunyamula chidebe pansi pa mpopi, ndikuchidzaza pamlingo wokhazikitsidwa, kenaka m'malo mwake ndi chidebe china ndikuyika nthawi yomwe zidebe zimadzazidwa (kapena kuchuluka kwa zidebe za "totalized" kutuluka) .Ndi kukakamizidwa koyenera ndi kulipidwa kwa kutentha, kuthamanga kwa misala kumatha kutsimikiziridwa molondola.

Koeo M mndandanda wa mita ndi ma mita abwino osamuka.Amapangidwa kuti azitha kuyeza zamadzimadzi ponse pawiri-kutumiza ndi kuwongolera njira.Iwo akhoza kuikidwa mu mpope kapena mphamvu yokoka otaya makina.Chifukwa cha mapangidwe awo osavuta, ndi osavuta kusamalira, komanso osavuta kusintha machitidwe osiyanasiyana.

Khomo la mita (1) lapangidwa ndi zibowo zitatu zozungulira (2).Ma rotor atatu, chotchinga chotchinga (3) ndi ma rotor awiri osuntha (4, 5), amasintha ubale wolumikizana mkati mwa bore.Ma rotor atatu amathandizidwa ndi mbale zonyamula (6, 7).Mapeto a rotors amatuluka kudzera mu mbale zonyamula.Zida zotsekera zozungulira (8) zimayikidwa kumapeto kwa rotor yotsekereza.Magiya a rotor osamutsidwa (9, 10) amayikidwa kumapeto kwa ma rotor osamutsidwa.Magiyawa amapanga mgwirizano wanthawi yolumikizana pakati pa ma rotor atatu.

Pamene madzi akudutsa mu nyumba ya mita, msonkhano wa rotor umatembenuka.Madziwo amathyoledwa m'magawo ofanana ndi ma rotors.Kusuntha kwamadzi kumachitika nthawi imodzi.Madzi akamalowa, gawo lina lamadzimadzi limagawidwa ndi kuyezedwa.Panthawi imodzimodziyo, madzi omwe ali patsogolo pake amachotsedwa pa mita ndikulowa mu mzere wotuluka.Popeza kuchuluka kwa bores kumadziwika, ndipo kuchuluka kwamadzimadzi komweko kumadutsa mita pakusintha kulikonse kwa rotor yotsekereza, kuchuluka kwamadzi komwe kumadutsa mita kumatha kutsimikiziridwa ndi kulondola kwakukulu.

Kuyenda kozungulira kowona kumeneku kumafalikira kudzera mu gland yonyamula, giya lakumaso, shaft yoyendetsa, ndi chosinthira ku stack yolembera ndi kauntala.Kutulutsa kozungulira kowona kumatanthauza kulondola kosasintha, chifukwa chizindikirocho chimagwirizana ndendende ndi kuchuluka kwa voliyumu nthawi iliyonse.Pamalo aliwonse azungulira, thupi la mita, chotchinga chotchinga, ndi chimodzi mwazozungulira zomwe zimasamutsidwa zimapanga chisindikizo chopitilira capillary pakati pa chinthu chopanda mtunda chopanda mita ndi chinthu chotsika pansi.

Chifukwa chakuti mankhwalawa amasiyanitsidwa ndi chisindikizo cha capillary, palibe kukhudzana kwachitsulo ndi zitsulo kumafunika mkati mwa chinthu cha metering.Izi zikutanthauza kuti palibe kuvala, komanso kuvala kumatanthauza kuti palibe kuwonjezeka kwa kutsetsereka, zomwe zikutanthauza kuti palibe kuwonongeka kolondola.

Pazinthu zonse za metering, malo okwerera amakhala malo athyathyathya kapena nkhope za cylindrical ndi magawo omwe amapangidwa molondola.Makina osavuta awa, kuphatikizanso mfundo yoti palibe kuyenda mozungulira kapena kubwerezabwereza mkati mwa chipangizocho, zimalola kulolerana kwapafupi komanso kosasintha mkati mwa ma mita a Koeo positive.

Chogulitsa chomwe chikuyenda mu mita chimakhala ndi mphamvu yosunthika yomwe ili pamakona abwino kumaso a ma rotor osamutsidwa.Mamita amapangidwa kuti ma rotor shafts nthawi zonse azikhala mu ndege yopingasa.Mfundo ziwirizi zimapangitsa kuti palibe axial thrust.Chifukwa chake, ma mita osunthika a Koeo samafunikira ma washer kapena ma thrust bear, ndipo ma rotor amangofunafuna pakatikati pa mtsinje pakati pa mbale ziwiri zonyamula - kuchotsa malekezero a ma rotator ndi mbale zonyamula.Apanso, palibe zotsatira zobvala zikutanthauza kuti palibe kutopa kwachitsulo komanso kusagwirizana.

Koeo positive mita zakusamuka amapangidwa ndi zinthu zosiyanasiyana kuti zigwirizane ndi zinthu zosiyanasiyana.Chifukwa cha kapangidwe kake kosavala, zisindikizo za capillary, ndi ma rotary metering apadera, ma mita osunthika a Koeo amapereka kulondola kosafanana, moyo wautali wogwira ntchito, komanso kudalirika kwapadera.

 

Mbali ndi ubwino.

• Mamita abwino osamutsidwa amatha kuyeza kuthamanga kwapakatikati, kutsika kwambiri, komanso zamadzimadzi pafupifupi ma viscosity aliwonse.Mamita a PD amayenda nthawi yomweyo pakakhala kusuntha kwamadzimadzi, ndipo imayima nthawi yomweyo pamene kusuntha kwamadzimadzi kumasiya.

• Kuyeza kwa mita yabwino yosamutsidwa sikukhudzidwa ndi kukhuthala kwa madzi, kachulukidwe kapena chipwirikiti mu chitoliro.Madzi onse osasunthika amakhala ndi voliyumu yofanana ndipo palibe chifukwa chowongolera kutulutsa kwa mita kuti akwaniritse izi.

• Kulondola kwambiri

• Kutsika kwapansi kumatsika

• Kusintha kopanda mayendedwe

• Valani kapangidwe ka vane

• Kuwerenga kwamakina kapena zamagetsi

• Zoyenera pazamadzimadzi zosiyanasiyana

• Ma flowmeters amtundu wabwino nthawi zambiri amapereka kulondola kwakukulu, mwachitsanzo, pafupifupi ± 0.1% ya liwiro lenileni nthawi zina.The metering kulondola wa unit afika bwino ndi kuwonjezeka ndondomeko kukhuthala madzimadzi mamasukidwe akayendedwe.

• Mamita a PD amaperekanso kubwereza kwabwino kwambiri komwe kumatha kukhala mpaka 0.05% ya kuwerenga.

• Mamita a PD amatha kugwira ntchito popanda kugwiritsa ntchito magetsi.Komanso, iwo safuna molunjika kumtunda ndi kunsi kwa chitoliro chitoliro amathamanga kuwakhazikitsa.

• Mamita a PD alipo kukula mpaka 12 in.

• Chiŵerengero chawo chobwezera chikhoza kufika pa 100:1.

• Popeza mamita a PD ali ndi zilolezo zochepa kwambiri pakati pa zigawo zawo zokonzedwa bwino, kuvala mofulumira kumakhudza kulondola kwawo.Chifukwa chake, ma mita amtunduwu nthawi zambiri saperekedwa poyezera matope kapena madzi abrasive.

• Positive displacement flowmeters amagwiritsidwa ntchito ngati ma mita a madzi apakhomo.

• Kulondola kwa ma flowmeter abwino osuntha kumadalira kudalirika kwa chisindikizo cha capillary chomwe chimagwiritsidwa ntchito kulekanitsa madzi odutsa m'maphukusi.Kuti mupeze kulondola kofunikira ndikuwonetsetsa kuti mita ya PD ikugwira ntchito moyenera, makina osefera amafunikira.Dongosolo loseferali liyenera kukhala lokwanira kuchotsa tinthu tating'onoting'ono tating'onoting'ono komanso thovu la gasi kuchokera pamadzi oyenda.

• Positive displacement flowmeters ntchito pa mfundo yosavuta ntchito.Positive displacement flowmeters imakhala ndi ma rotor olondola kwambiri poyezera kayendedwe ka madzimadzi.Ma voliyumu osasunthika amadzimadzi amasunthidwa pakati pa ma rotors.Kuzungulira kwa ma rotor awa kumayenderana mwachindunji ndi kuchuluka kwa madzi omwe akusunthira.

• Chotengera chapakati chamagetsi chamagetsi chimaphatikizidwa mu kapangidwe kake ka mita ya PD yomwe imawerengera kuchuluka kwa kuzungulira kwa rotor.Nambala yowerengedwayi imagwiritsidwa ntchito kuwerengera kuchuluka kwamadzimadzi ndi kuchuluka kwamayendedwe.

• Rotor ya mtundu wa flowmeter yosuntha imatha kupangidwa m'njira zambiri.

• Ma flowmeters abwino atha kugwiritsidwa ntchito pafupifupi pamadzi onse osasungunuka monga mafuta otenthetsera, mafuta opaka mafuta, zowonjezera polima, mafuta anyama ndi masamba, inki yosindikizira, freon, ndi zina zambiri.