Kuti unzwisise kubuda kwepombi yecentrifugal, zvakakosha kuti utange wanzwisisa mashandiro epombi yecentrifugal.Sezvo kuyerera kunopinda nepakati peziso repombi uye kukwira kune impeller vanes, mvura inenge yakaderera uye yakaderera velocity.Apo kuyerera kunopfuura nepakati pevolute, kudzvinyirira kunowedzera uye kukurumidza kunowedzera.Kuyerera kunobva kwabuda kuburikidza nekubuda, panguva iyo pressure inenge yakakwira asi kasi yacho inononoka.Kuyerera kunopinda mupombi kunofanira kubuda kunze kwepombi.Iyo pombi inopa musoro (kana kumanikidza), zvinoreva kuti inowedzera simba repombi fluid.
Kumwe kutadza kwechikamu chepombi yecentrifugal, sekubatanidza, hydraulic, static joints, uye mabearings, zvinokonzeresa kuti sisitimu yese ikundikane, asi ingangoita makumi matanhatu nepfumbamwe muzana yekutadza kwepombi kwese kunokonzerwa nekusashanda kwechisimbiso.
KUDIWA KWEZVISIMBO ZVEMACHANIcal
Mechanical seal chisimbiso chinoshandiswa kudzora kuvuza pakati peshaft inotenderera nemudziyo- kana gasi-yakazadzwa ngarava.Basa rayo guru nderokudzora kubuda.Zvisimbiso zvese zvinodonhedza-vanofanira kuita kuitira kuchengetedza firimu remvura pamusoro pese mechanical seal face.Iyo leakage inobuda kudivi remhepo yakadzikira;kudonha muHydrocarbon, semuenzaniso, kunoyerwa nemamita eVOC muzvikamu/miriyoni.
Michina isati yasimbwa isati yagadzirwa, mainjiniya aiwanzovhara pombi ine michina yekurongedza.Mechanical packing, chinhu chine fibrosi chinowanzoiswa mafuta ekuzora senge graphite, chaichekwa kuita zvidimbu ndokuiswa pasi chainzi "stuffing box."Packing gland yakabva yawedzerwa kune
kumashure kuitira kurongedza zvese pasi.Sezvo kurongedza kuri kutarisana zvakananga ne shaft, inoda lubrication, asi icharamba ichibira bhiza.
Kazhinji "mhete yemwenje" inobvumira mvura inoyerera kuti ishandiswe pakurongedza.Mvura iyoyo, inofanirwa kuzora nekutonhodza shaft, inodonhedza mukati mekuita kana mumhepo.Zvichienderana nechikumbiro chako, ungangoda:
• kunangisa mvura yekugezesa kure nemugadziro kudzivirira kusvibiswa.
· kudzivirira mvura yekugezesa kuti isaunganidzwe pasi (overspray), zvinova zvese zvinetswa neOSHA uye nekuchengetedza imba.
· chengetedza bhokisi rekutakura kubva mumvura inoyerera, iyo inogona kusvibisa oiri uye pakupedzisira inotungamirira mukukundikana kwekutakura.
Sezvakaita pombi yega yega, iwe uchada kuyedza pombi yako kuti uwane mutengo wepagore waunoda kumhanya.Pombi inotakura inogona kukwanisika kuisa nekuchengetedza, asi kana iwe ukaverenga kuti ingani marita emvura inopedza paminiti kana pagore, unogona kushamiswa nemutengo.Iyo mechanical seal pombi inogona kukuchengetedza mari yakawanda yegore.
Tichifunga nezve general geometry yemuchina chisimbiso, chero kupi kune gasket kana o-mhete, panotevera mukana wekuvuza:
· Yakakukurwa, yakasakara, kana kunetseka dynamic o-ring (kana gasket) apo mechaniki chisimbiso chinofamba.
· Tsvina kana kusvibiswa pakati pemakanika zvisimbiso.
· Kushanda kwe-off-design mukati memakanika zvisimbiso.
DZIDZISO SHANU DZEKUSINA CHISIMBO CHINHU ZVINOKONA
Kana pombi yecentrifugal ichiratidza kubuda kusingadzoreki, unofanira kunyatsoongorora zvese zvingakonzeresa kuti uone kana uchida kugadziriswa kana kuiswa patsva.
1. Kukundikana Kwekushanda
Kuregeredza Iyo Yakanyanya Kushanda Poindi: Uri kushandisa pombi paYakanakisa Efficiency Point (BEP) pane yekuita curve?Pombi imwe neimwe yakagadzirwa ne
chaiyo Efficiency Point.Paunenge uchishanda pombi kunze kwenharaunda iyoyo, iwe unogadzira matambudziko nekuyerera kunoita kuti system isakundike.
Insufficient Net Positive Suction Head (NPSH): Kana iwe usina yakakwana yekusveta musoro kune pombi yako, gungano rinotenderera rinogona kusagadzikana, kukonzera cavitation, uye kuguma mukukundikana kwechisimbiso.
Kushanda Yakafa-Musoro: Kana iwe ukaisa vheji yekudzora yakadzika zvakanyanya kuti utsikise pombi, unogona kudzipa kuyerera.Kuyerera kwakakachidzwa kunokonzeresa kutenderera mukati mepombi, izvo zvinogadzira kupisa uye zvinosimudzira kutadza kwechisimbiso.
Dry Running & Improper Venting yeChisimbiso: Pombi yakatwasuka ndiyo inonyanya kutapurira sezvo chisimbiso chemuchina chaiswa pamusoro.Kana iwe uine mhepo isina kufanira, mweya unogona kuvharirwa uchitenderedza chisimbiso uye haugone kuburitsa bhokisi rekuisa.Iyo mechanical seal ichakurumidza kukundikana kana pombi ikaramba ichimhanya mumamiriro ezvinhu aya.
Low Vapor Margin: Idzi imvura inopenya;mahydrocarboni anopisa anopenya kana aiswa mumhepo.Sezvo firimu remvura richipfuura nepakati pechisimbiso chemuchina, rinogona kupenya padivi remhepo uye kukonzera kukundikana.Kutadza uku kunowanzoitika nema boiler feed masisitimu-mvura inopisa pa250-280ºF flash nekudzvanywa kunodonha pazviso zvechisimbiso.
2. Mechanical Kukundikana
Shaft misalignment, kubatanidza kusaenzana, uye kusaenzana kwemhepo zvese zvinogona kubatsira mukukundikana kwechisimbiso.Mukuwedzera, mushure mokunge pombi yaiswa, kana iwe usina kurongeka mapaipi akavharidzirwa kwairi, iwe uchapa dambudziko rakawanda papombi.Iwe zvakare unofanirwa kudzivirira hwaro hwakashata: Iyo base yakachengeteka here?Yakachekwa zvakanaka here?Une tsoka yakapfava here?Yakanyatsobhaudhiwa here?Uye chekupedzisira, tarisa mabearings.Kana kushivirira kwemabheya kuchipfeka kuonda, shafts ichafamba uye inokonzera kudengenyeka kwepombi.
3. Chisimbiso Chikamu Kukundikana
Iwe une yakanaka tribological (iyo yekudzidza yefriction) peya?Wakasarudza masanganiswa akatarisana chaiwo here?Zvakadini nechisimbiso chinotarisana nemhando yezvinhu?Zvishandiso zvako zvakafanira here kune yako chaiyo application?Wakasarudza zvisimbiso zvakakodzera zvechipiri, zvakadai segaskets uye o-rings, izvo zvakagadzirirwa kurwiswa kwemakemikari uye kupisa?Zvitubu zvako hazvifanirwe kuvharwa kana kuita ngura.Chekupedzisira, ramba wakatarisa kukanganiswa kwechiso kubva mukumanikidzwa kana kupisa, sezvo chisimbiso chemuchina chiri pasi pekumanikidzwa kukuru chinokotama, uye chimiro chakatsvedza chinogona kukonzera kuvuza.
4. Kukundikana Kwekugadzira System
Iwe unoda chisimbiso chakakodzera chekugadzirisa, pamwe chete nekutonhodza kwakakwana.Dual systems dzine zvivhariso zvinwiwa;iyo yekubatsira chisimbiso poto inoda kunge iri munzvimbo chaiyo, ine chiridzwa chakakodzera uye pombi.Iwe unofanirwa kutora Hurefu hwePipe Yakatwasuka paSuction muaccount-mamwe ekare pombi masisitimu aiwanzouya senge akaputirwa skid anosanganisira 90º gokora pakusveta iko kuyerera kusati kwapinda muziso remhepo.Gokora rinokonzeresa kuyerera kunokonzera kusagadzikana mugungano rinotenderera.Kwese kusveta / kuburitsa uye pombi yekupfuura inoda kugadzirwa nemazvo zvakare, kunyanya kana mamwe mapaipi akagadziridzwa pane imwe nguva mumakore apfuura.
5. Zvimwe Zvose
Zvimwe zvinhu zvakasiyana-siyana zvinongokonzera chete 8 muzana yekukundikana kwese.Semuenzaniso, masisitimu ebetsero dzimwe nguva anodiwa kuti ape nzvimbo inogamuchirika yekushanda kwechisimbiso chemuchina.Kuti utaure nezvehuviri masisitimu, iwe unoda mvura yekubatsira kuti uite sechivharo chinodzivirira kusvibiswa kana kugadzira mvura kuti isadere munzvimbo.Nekudaro, kune vazhinji vashandisi, kugadzirisa chimwe chezvikamu zvina zvekutanga zvichabata mhinduro yavanoda.
MHEDZISO
Mechanical seals chinhu chikuru mukutenderera kwemidziyo kuvimbika.Ivo vane mhosva yekuvuza uye kutadza kweiyo system, asi zvakare vanoratidza matambudziko anozopedzisira akonzera kukuvara kwakanyanya munzira.Kuvimbika kwechisimbiso kunonyanya kukanganiswa nekugadzirwa kwechisimbiso uye nzvimbo yekushanda.
NaFrank Rotello, Mechanical injiniya weCummins-Wagner Co.,Inc.
Nguva yekutumira: Jan-04-2022