Yini afutha shaft seal?
Izigxivizo ze-shaft zivimbela uketshezi ukuba luphume ku-shaft ejikelezayo noma ephindaphindayo.Lokhu kubalulekile kuwo wonke amaphampu futhi endabeni yamaphampu angu-centrifugal izinketho ezimbalwa zokuvala zizotholakala: ukupakishwa, izindebe zomlomo, kanye nazo zonke izinhlobo zezimpawu zemishini- eyodwa, kabili kanye ne-tandem kuhlanganise ne-cartridge seal.Amaphampu e-Rotary positive agudluza njengamaphampu egiya namaphampu ane-vane ayatholakala ngokupakishwa, izindebe nezinhlelo zokuvala uphawu.Amaphampu aphindaphindayo adala izinkinga ezihlukene zokuvala futhi ngokuvamile ancike ekugxilweni kwezindebe noma ekupakisheni.Eminye imiklamo, njengamaphampu kazibuthe oshayelayo, amaphampu e-diaphragm noma amaphampu e-peristaltic, awadingi izimpawu ze-shaft.Lawa maphampu abizwa ngokuthi 'angenasici' ahlanganisa ama-stationary seal ukuvimbela ukuvuza koketshezi.
Yiziphi izinhlobo eziyinhloko zama-pump shaft seal?
Ukupakisha
Ukupakisha (okubuye kwaziwe ngokuthi ukupakisha ku-shaft noma ukupakisha kwezindlala) kuqukethe into ethambile, evamise ukuphonswa noma ukwakheka izindandatho.Lokhu kucindezelwa ekamelweni elizungeze i-drive shaft ebizwa ngokuthi ibhokisi lokugxilisa ukudala uphawu (Umfanekiso 1).Imvamisa, ukucindezelwa kusetshenziswa i-axially ekupakisheni kodwa futhi kungasetshenziswa nge-radially nge-hydraulic medium.
Ngokwesiko, ukupakisha kwakwenziwa ngesikhumba, intambo noma iflakisi kodwa manje ngokuvamile kuqukethe izinto ezingasebenzi njenge-PTFE enwetshiwe, i-graphite ecindezelwe, nama-elastomers ayi-granulated.Ukupakisha ukonga futhi kuvame ukusetshenziselwa uketshezi oluwugqinsi, okunzima ukuvala uphawu olufana nama-resin, itiyela noma izinto zokunamathisela.Kodwa-ke, kuyindlela yokuvala engalungile yoketshezi oluncane, ikakhulukazi lapho kunengcindezi ephezulu.Ukupakisha akuvamile ukuthi kwehluleke ngendlela eyingozi, futhi kungashintshwa ngokushesha phakathi nokuvalwa okuhleliwe.
Ukupakisha ama-seal kudinga ukugcotshwa ukuze kugwenywe ukunqwabelana kokushisa okushayisanayo.Lokhu kuvame ukunikezwa uketshezi olumpontshwa ngokwalo oluvame ukuvuza kancane ezintweni zokupakisha.Lokhu kungase kube ukungcolile futhi esimweni soketshezi olubolayo, oluvuthayo, noma olunobuthi ngokuvamile akumukeleki.Kulezi zimo kungasetshenziswa okokugcoba kwangaphandle okuphephile.Ukupakisha akufanelekile ukuvala amaphampu asetshenziselwa uketshezi oluqukethe izinhlayiya ezihuquzelayo.Izinto eziqinile zingagxilwa ezintweni zokupakisha futhi lokhu kungase kulimaze i-pump shaft noma udonga lwebhokisi lokugxusha.
Izindebe zomlomo
I-Lip Seal, eyaziwa nangokuthi i-radial shaft seal, imane nje iyizici ze-elastomeric eziyindilinga ezigcinwe endaweni eseduze ne-drive shaft yindlu yangaphandle eqinile (Umfanekiso 2).Uphawu luvela ekuxhumaneni okungqubuzanayo phakathi 'kwe-lip' ne-shaft futhi lokhu kuvame ukuqiniswa isiphethu.Izindebe zokuvalwa kwezindebe zivamile kuyo yonke imboni ye-hydraulic futhi zingatholakala kumaphampu, ama-hydraulic motors, nama-actuator.Imvamisa ihlinzeka ngophawu lwesibili, oluyisipele kwezinye izinhlelo zokuvala ezifana nezigxivizo zemishini Izigxivizo zamalebe ngokuvamile zikhawulelwe kungcindezi ephansi futhi azilungi ngoketshezi oluncane, olungalugcobisi.Amasistimu amaningi okuvalwa kwezindebe asetshenziswe ngempumelelo ngokumelene nezinhlobonhlobo zoketshezi lwe-viscous, olungahubi.Izindebe zokuvalwa kwezindebe azifanele ukusetshenziswa nanoma yiluphi uketshezi olunamanzi noma uketshezi oluqukethe okuqinile njengoba kulula ukuguga futhi noma yimuphi umonakalo omncane ungaholela ekuhlulekeni.
Izimpawu zemishini
Izigxivizo zemishini empeleni zihlanganisa ipheya eyodwa noma ngaphezulu yobuso obuyisicaba, obupholisheke kakhulu, obubodwa obumile endlini nobunye obuzungezayo, obuxhunywe ku-drive shaft (Umfanekiso 3).Ubuso budinga ukugcotshwa, kungaba ngoketshezi olumpontshwa ngokwalo noma ngoketshezi oluvimbelayo.Empeleni, ubuso bophawu buthintana kuphela lapho iphampu iphumule.Ngesikhathi sokusetshenziswa, uketshezi olugcobayo lunikeza ifilimu elincanyana, le-hydrodynamic phakathi kobuso be-seal obuphikisanayo, ukunciphisa ukuguga nokusiza ukuchithwa kokushisa.
Izigxivizo zemishini zingakwazi ukuphatha uketshezi oluningi, ama-viscosity, izingcindezi, namazinga okushisa.Kodwa-ke, uphawu lomshini akufanele lomiswe.Inzuzo eyinhloko yezinhlelo ze-mechanical seal ukuthi i-drive shaft kanye ne-casing akuyona ingxenye yendlela yokuvala (njengoba kunjalo ngokupakisha nezindebe zomlomo) ngakho-ke azikho ngaphansi kokugqoka.
Izigxivizo ezimbili
Izigxivizo eziphindwe kabili zisebenzisa izigxivizo ezimbili zemishini ezibekwe emuva emuva (Umfanekiso 4).Isikhala esingaphakathi kumasethi amabili obuso bophawu singacindezelwa ngamanzi ngoketshezi oluvimbelayo ukuze ifilimu esebusweni bophawu oludingekayo ekugcotshisweni kube uketshezi oluvimbelayo hhayi okuphakathi okupontshwayo.Uketshezi oluthiwa yisithiyo kumele luhambisane ne-pumped medium.Izigxivizo eziphindwe kabili ziyinkimbinkimbi kakhulu ukusebenza ngenxa yesidingo sokucindezela futhi ngokuvamile zisetshenziswa kuphela lapho kudingekile ukuvikela abasebenzi, izingxenye zangaphandle kanye nendawo ezungezile oketshezini oluyingozi, olunobuthi noma oluvuthayo.
Izimpawu ze-Tandem
Izigxivizo ze-Tandem zifana nezigxivizo ezimbili kodwa amasethi amabili wezimpawu zemishini abheke ohlangothini olufanayo kunokubuyela emuva.Isigxivizo esisohlangothini lomkhiqizo kuphela esijikeleza oketshezini olumpontshiwe kodwa ukugeleza kobuso be-seal ekugcineni konakalise isithambisi esivimbelayo.Lokhu kunemiphumela ku-atmospheric side seal nendawo ezungezile.
Izimpawu ze-Cartridge
I-cartridge seal iyiphakheji ehlanganiswe kusengaphambili yezingxenye zophawu lwemishini.Ukwakhiwa kwe-cartridge kuqeda izinkinga zokufaka njengesidingo sokulinganisa nokusetha ukucindezelwa kwentwasahlobo.Ubuso be-seal bubuye buvikelwe ekulimaleni ngesikhathi sokufakwa.Ekwakhiweni, i-cartridge seal ingaba ukucushwa okukodwa, okukabili noma kwe-tandem okuqukethwe ngaphakathi kwendlala futhi kwakhelwe phezu komkhono.
Izimpawu zesithiyo segesi.
Lezi izihlalo ezimbili zesitayela se-cartridge ezinobuso obuklanyelwe ukucindezelwa kusetshenziswa igesi engasebenzi njengesivimbeli, esingena esikhundleni soketshezi olujwayelekile lokuthambisa.Ubuso be-seal bungase buhlukaniswe noma bubanjwe buxhumene okuxekethile ngesikhathi sokusebenza ngokulungisa ukucindezela kwegesi.Inani elincane legesi lingase liphume liye emkhiqizweni nasemkhathini.
Isifinyezo
Ama-shaft seal avimbela uketshezi ukuba luphume ku-shaft yepompo ezungezayo noma ephindaphindayo.Ngokuvamile izinketho ezimbalwa zokuvala zizotholakala: ukupakishwa, izigxivizo zomlomo, nezinhlobo ezahlukene zezimpawu zemishini- eyodwa, kabili kanye ne-tandem kuhlanganise ne-cartridge seal.
Isikhathi sokuthumela: May-18-2023