1. Omakhenikhaulwazi lwe-seal: isimiso sokusebenza se-mechanical seal
Mechanical sealiyithuluzi lokuvalwa kwe-shaft elincike kupheya eyodwa noma ezimbalwa zobuso obushelelayo ngokuqhathaniswa ne-shaft ukuze lihlale lilingana ngaphansi kwesenzo sokucindezela koketshezi namandla okunwebeka (noma amandla kazibuthe) wendlela yesinxephezelo futhi afakelwe izigxivizo ezisizayo. ukufeza ukuvimbela ukuvuza.
2. Ukukhethwa kwezinto ezivame ukusetshenziselwa izigxivizo zemishini
Amanzi ahlanzekile;izinga lokushisa elivamile;(ashukumisayo) 9CR18, 1CR13 engaphezulu kwe-cobalt chromium tungsten, insimbi ecijile;(static) inregnated resin graphite, bronze, phenolic plastic.
Amanzi omfula (aqukethe intlenga);izinga lokushisa elivamile;(ashukumisayo) i-tungsten carbide, (i-static) i-tungsten carbide
Amanzi olwandle;izinga lokushisa elivamile;(ashukumisayo) i-tungsten carbide, i-1CR13 ehlanganisa i-cobalt chromium tungsten, insimbi ecijile;(i-static) efakwe i-resin graphite, i-tungsten carbide, i-cermet;
Amanzi ashisa kakhulu ama-degree angu-100;(ashukumisayo) i-tungsten carbide, i-cobalt chromium tungsten engu-1CR13 engaphezulu, insimbi ecijile;(i-static) efakwe i-resin graphite, i-tungsten carbide, i-cermet;
Uphethiloli, uwoyela wokugcoba, i-hydrocarbon ewuketshezi;izinga lokushisa elivamile;(ashukumisayo) i-tungsten carbide, i-cobalt chromium tungsten engu-1CR13 engaphezulu, insimbi ecijile;(static) i-resin efakwe ngaphakathi noma i-tin-antimony alloy graphite, ipulasitiki ye-phenolic.
Uphethiloli, uwoyela wokugcoba, i-hydrocarbon ewuketshezi;100 degrees;(ashukumisayo) i-tungsten carbide, i-cobalt chromium tungsten engu-1CR13 engaphezulu;(static) ithusi elifakiwe noma i-resin graphite.
Uphethiloli, uwoyela wokugcoba, ama-hydrocarbon awuketshezi;equkethe izinhlayiya;(ashukumisayo) i-tungsten carbide;(static) i-tungsten carbide.
3. Izinhlobo nokusetshenziswa kweizinto zokuvala
I impahla yokuvala kufanele ihlangabezane nezidingo zokusebenza kokuvala uphawu.Ngenxa yokuthi imidiya okufanele ivalwe ihlukile futhi nezimo zokusebenza zemishini zihlukile, izinto zokuvala ziyadingeka ukuze zibe nokuguquguquka okuhlukile.Izidingo zezinto zokuvala uphawu ngokuvamile ziyi:
1) Impahla inokuminyana okuhle futhi akulula ukuvuza imidiya;
2) Yiba namandla afanelekile nobulukhuni bemishini;
I-3) Ukucindezelwa okuhle nokuqina, ukuguqulwa okuncane okungapheli;
4) Ayithambisi noma ibole emazingeni okushisa aphezulu, ayiqini noma ayiqhekeki emazingeni okushisa aphansi;
5) Inokumelana nokugqwala okuhle futhi ingasebenza isikhathi eside ku-asidi, i-alkali, uwoyela neminye imidiya.Umthamo wayo kanye nokuguquka kokuqina kuncane, futhi akunamatheli endaweni yensimbi;
I-6) I-coefficient encane ye-friction kanye nokumelana okuhle kokugqoka;
7) Inokuvumelana nezimo ukuhlanganisa neindawo yokubeka uphawu;
8) Ukumelana nokuguga okuhle nokuqina;
9) Kulula ukucubungula nokukhiqiza, kushibhile futhi kulula ukuthola izinto zokwakha.
Irabhainto esetshenziswa kakhulu yokuvala.Ngaphandle kwenjoloba, ezinye izinto ezifanele zokuvala zifaka i-graphite, i-polytetrafluoroethylene kanye nama-sealants ahlukahlukene.
4. Izinto ezibalulekile zobuchwepheshe zokufakwa nokusetshenziswa kwezimpawu zemishini
1).I-radial runout ye-shaft ejikelezayo yemishini kufanele ibe ngu-≤0.04 mm, futhi ukunyakaza kwe-axial akufanele kube ngaphezu kuka-0.1 mm;
2) Ingxenye yokuvala impahla kufanele igcinwe ihlanzekile ngesikhathi sokufakwa, izingxenye zokuvala kufanele zihlanzwe, futhi ubuso bokugcina uphawu kufanele bube buphelele ukuvimbela ukungcola kanye nothuli ukuthi lungangeni engxenyeni yokuvala;
3).Akuvunyelwe ngokuphelele ukushaya noma ukungqongqoza phakathi nenqubo yokufaka ukuze ugweme ukulimala kokungqubuzana kophawu lwemishini kanye nokwehluleka kophawu;
I-4) Ngesikhathi sokufakwa, ungqimba lwamafutha omshini ohlanzekile kufanele lusetshenziswe ebusweni ngokuthinta uphawu ukuze kuqinisekiswe ukufakwa okubushelelezi;
I-5) Uma ufaka i-static ring gland, izikrini zokuqinisa kufanele zigcizelelwe ngokulinganayo ukuze kuqinisekiswe i-perpendicularity phakathi kobuso bokuphela kwendandatho ye-static kanye nomugqa we-axis;
6) Ngemva kokufaka, cindezela indandatho enyakazayo ngesandla ukuze wenze indandatho enyakazayo ihambe ngokuguquguqukayo ku-shaft futhi ibe nezinga elithile lokunwebeka;
7) Ngemuva kokufakwa, vula i-shaft ejikelezayo ngesandla.I-shaft ejikelezayo akufanele izizwe inzima noma inzima;
8) Izinto ezisetshenziswayo kumele zigcwaliswe ngemidiya ngaphambi kokuthi zisebenze ukuze kunqandwe ukungqubuzana okomile kanye nokungaphumeleli kotywino;
9) Ukuze uthole imidiya ecwebezelayo neyimbudumbudu, lapho izinga lokushisa eliphakathi liyi> 80OC, kufanele kuthathwe izinyathelo ezihambisanayo zokugezwa, ukuhlunga, nokupholisa.Sicela ubheke izindinganiso ezifanele zezigxivizo zemishini zezinsiza ezihlukahlukene.
10).Ngesikhathi sokufakwa, ungqimba lwamafutha omshini ohlanzekile kufanele lusetshenziswe ebusweni lapho uthintana ne-uphawu.Ukunakwa okukhethekile kufanele kukhokhwe ekukhethweni kwamafutha omshini wezinto ezihlukene zokufaka uphawu ukuze kugwenywe ukubangela ukuba i-O-ring yande ngenxa yokungena kwamafutha noma ukusheshisa ukuguga, okubangela ukuvala ngaphambi kwesikhathi.Akuvumelekile.
5. Yiziphi izindawo ezintathu zokuvala ze-mechanical shaft seal, kanye nezimiso zokuvala zalezi zindawo ezintathu zokuvala?
Iuphawuphakathi kwendandatho enyakazayo kanye nendandatho emile incike kusici esinwebekayo (intwasahlobo, izifutho, njll.) kanyeuketshezi lokuvalaingcindezi yokukhiqiza amandla okucindezela afanelekile (isilinganiso) endaweni yokuxhumana (ubuso bokugcina) bendandatho ehamba kancane ehambayo kanye nendandatho emile.Pressure) yenza ubuso obubili obushelelezi nobuqondile bulingane;ifilimu eliwuketshezi elincanyana kakhulu ligcinwa phakathi kobuso bokuphela ukuze kuzuzwe umphumela wokuvala.Le filimu inomfutho we-liquid dynamic kanye ne-static pressure, edlala indima yokulinganisa ingcindezi nokugcoba ubuso bokuphela.Isizathu sokuthi kungani bobabili ubuso bokuphela kufanele busheleleke kakhulu futhi buqonde ukudala ukulingana okuphelele kobuso bokuphela kanye nokulinganisa ingcindezi ethile.Lokhu uphawu lokuzungezisa okuhlobene.
6. Mechanical sealulwazi kanye nezinhlobo zobuchwepheshe seal mechanical
Okwamanje, ahlukahlukene amashauphawu lomshiniubuchwepheshe obusebenzisa izinto ezintsha nezinqubo buthuthuka ngokushesha.Kukhona okusha okulandelayouphawu lomshiniubuchwepheshe.Ukuvala i-groove engaphezuluubuchwepheshe bokufaka uphawuEminyakeni yamuva nje, kuye kwavulwa imisele yokugeleza ehlukahlukene ebusweni bokuvalwa kwezimpawu zemishini ukuze kukhiqizwe imiphumela ye-hydrostatic ne-dynamic pressure, futhi isabuyekezwa.Ubuchwepheshe bokuvalwa kokuvuza kwe-Zero Esikhathini esedlule, bekukholelwa ukuthi izigxivizo zemishini ezingathintana nazo azikwazanga ukufeza ukuvuza okungu-zero (noma akukho ukuvuza).I-Israel isebenzisa ubuchwepheshe bokuvala uphawu ukuphakamisa umqondo omusha we-zero-leakage non-contact mechanical end seal, osetshenziselwe ukugcoba amaphampu kawoyela ezikhungweni zamandla enuzi.Ubuchwepheshe bokuvalwa kwegesi eyomile Lolu hlobo lophawu lusebenzisa ubuchwepheshe bokuvala uphawu lokuvala igesi.Ubuchwepheshe bokuvalwa kokumpompa obuphezulu busebenzisa imisele egelezayo endaweni evalayo ukumpompa uketshezi oluncane oluvuzayo ukusuka ezansi nomfula ubuyele phezulu.Izici zesakhiwo zezinhlobo ezibalulwe ngenhla zezimpawu yilezi: zisebenzisa imisele engashoni, futhi ukujiya kwefilimu nokujula kwe-flow groove kokubili kuyizinga le-micron.Baphinde basebenzise imisele yokugcoba, amadamu okuvalwa kwe-radial kanye nezinsimbi zokuvala eziyisiyingi ukuze zakhe izingxenye ezivalayo nezithwalayo.Kungashiwo futhi ukuthi uphawu lwe-grooved luyinhlanganisela ye-flat seal kanye ne-grooved bear.Izinzuzo zayo ukuvuza okuncane (noma akukho ukuvuza), ukushuba kwefilimu enkulu, ukuqedwa kokungqubuzana kokuxhumana, nokusetshenziswa kwamandla okuphansi kanye nomkhuhlane.Ubuchwepheshe bokuvalwa kwe-thermal hydrodynamic busebenzisa imisele ehlukahlukene ejulile yokuvala indawo egeleza ukuze kubangele ukuwohloka kokushisa kwendawo ukuze kukhiqize umphumela we-hydrodynamic wedge.Lolu hlobo lophawu olunamandla okuthwala i-hydrodynamic lubizwa ngokuthi i-thermohydrodynamic wedge seal.
Ubuchwepheshe bokuvalwa kwe-Bellows bungahlukaniswa bube yizimbongolo zensimbi ezakhiwe kanye nezinsimbi ezishiselwe ubuchwepheshe bokuvala uphawu.
Ubuchwepheshe be-Multi-end sealing buhlukaniswe ngokuvala kabili, ukuvala indandatho okuphakathi kanye nobuchwepheshe be-multi-seal.Ukwengeza, kukhona ubuchwepheshe obufanayo bokuvalwa kwe-surface, ubuchwepheshe bokubeka uphawu, ubuchwepheshe bokufaka uphawu obuhlanganisiwe, njll.
7. Mechanical sealulwazi, uhlelo lokugudluza uphawu lwemishini kanye nezici
Inhloso yokukhukhula ukuvimbela ukunqwabelana kokungcola, ukuvimbela ukwakheka kwezikhwama zomoya, ukugcina nokuthuthukisa ukuthambisa, njll. Uma izinga lokushisa loketshezi olushaywayo liphansi, libuye libe nomthelela wokupholisa.Izindlela eziyinhloko zokuhlanza zimi kanje:
1. Ukushaywa kwangaphakathi
1. I-Positive scour
(1) Izici: Indawo evalekile yomsingathi osebenzayo isetshenziselwa ukwethula ikamelo lokuvala kusukela ekugcineni kokuphuma kwepompo ngepayipi.
(2) Isicelo: sisetshenziselwa ukuhlanza uketshezi.I-P1 inkulu kancane kuno-P. Uma izinga lokushisa liphezulu noma kukhona ukungcola, ama-coolers, izihlungi, njll. zingafakwa epayipini.
2. Ukugeza ngemuva
(1) Izici: Indawo evalekile yomsingathi osebenzayo yethulwa egumbini lokuvala ukusuka ekugcineni kwepompo, futhi igeleza ibuyele endaweni yokungena yepompo ngepayipi ngemva kokushaywa.
(2) Isicelo: sisetshenziselwa ukuhlanza uketshezi, futhi u-P ufaka 3. Ukuhlanza okugcwele
(1) Izici: Indawo evalekile yomsingathi osebenzayo isetshenziselwa ukwethula ikamelo lokuvala kusukela ekugcineni kwepompo ngepayipi, bese igeleza ibuyele endaweni yokungena yepompo ngepayipi ngemva kokushaywa kwamanzi.
(2) Isicelo: Umphumela wokupholisa ungcono kunezimbili zokuqala, ezisetshenziselwa ukuhlanza uketshezi, futhi uma i-P1 iseduze no-P ngaphakathi no-P ngaphandle.
2. Ukugwaza kwangaphandle
Izici: Yethula uketshezi oluhlanzekile oluvela ohlelweni lwangaphandle oluhambisana nendawo evalekile ukuya endaweni yokuvala ukuze kugezwe.
Isicelo: Ukucindezela koketshezi olushaywayo kwangaphandle kufanele kube ngu-0.05--0.1MPA omkhulu kunomthombo ovaliwe.Ifanele izimo lapho i-medium ishisa kakhulu noma inezinhlayiya eziqinile.Izinga lokugeleza koketshezi olushaywayo kufanele liqinisekise ukuthi ukushisa kuyasuswa, futhi kufanele futhi lihlangabezane nezidingo zokushaywa ngaphandle kokubangela ukuguguleka kwezimpawu.Ukuze kufezeke lokhu, ukucindezela kwegumbi lophawu kanye nezinga lokugeleza kokushaywa kufanele kulawulwe.Ngokuvamile, izinga lokugeleza koketshezi oluhlanzekile olushaywayo kufanele libe ngaphansi kuka-5M/S;uketshezi oluludaka oluqukethe izinhlayiya kufanele lube ngaphansi kuka-3M/S.Ukuze kuzuzwe inani lezinga lokugeleza elingenhla, uketshezi olushaywayo kanye nendawo yokuvala kufanele kube Umehluko wengcindezi kufanele ube u-<0.5MPA, ngokuvamile u-0.05--0.1MPA, kanye no-0.1--0.2MPa wezigxivizo zomshini ezineziphetho ezimbili.Indawo ephumayo ukuze uketshezi olushaywayo lungene futhi lukhiphe imbobo yokuvala kufanele isethwe eduze kobuso bokuphela kokuvala futhi eduze nohlangothi lwendandatho ehambayo.Ukuze uvimbele indandatho ye-graphite ukuthi ingaguguleka noma ikhubazeke ngenxa yokuhluka kwezinga lokushisa ngenxa yokupholisa okungalingani, kanye nokunqwabelana kokungcola nokupheka, njll., isingeniso esine-Tangential noma ukugungiswa kwamaphuzu amaningi kungasetshenziswa.Uma kunesidingo, uketshezi olushaywayo kungaba amanzi ashisayo noma umusi.
Isikhathi sokuthumela: Oct-31-2023