Yaushe Ya Kamata Ka Yi Amfani da Hatimin Injin Karfe Mai Kauri?

Yaushe Za a Zaɓi Hatimin Injin ƙarfe

Hatimin injina na ƙarfe suna wakiltar muhimmin mafita na injiniya don kayan aiki masu juyawa waɗanda ke aiki a waje da sigogin daidaitattun hatimin gargajiya na elastomer. Ta hanyar maye gurbin hatimin sakandare mai ƙarfi da maɓuɓɓugan naɗawa da yawa tare da ƙwanƙolin ƙarfe mai walda, waɗannan hatimin suna ba da ƙarfin bazara mai ɗaukar fuska da kuma iyakar hatimin sakandare mai hermetic. Wannan tsarin gine-gine na musamman yana canza iyakokin aiki na famfo, yana ba da damar ci gaba da aiki a cikin mahalli wanda zai lalata hanyoyin hatimin da aka saba da su cikin sauri.

Zafin jiki, Matsi, da Saurin Shaft

Injiniyoyin yawanci suna canzawa zuwa bellon ƙarfe lokacin da sigogin aiki suka wuce iyakokin aiki masu aminci na zoben O-na yau da kullun. Hatimin bellon ƙarfe na yau da kullun mai layi ɗaya mai walda yana iya sarrafa yanayin zafi mai kyau daga -75°C zuwa 400°C (-100°F zuwa 750°F), wanda ya fi iyakar zafin jiki na Viton ko Kalrez elastomers na 150°C zuwa 200°C. A cikin aikace-aikacen cryogenic da ke kula da iskar gas mai ruwa, tsarin ƙarfe yana kiyaye sassaucinsa inda roba zai zama mai karyewa da karyewa.

Ƙarfin matsi yana da ƙarfi iri ɗaya. Duk da cewa belun kunne masu haɗin baki na yau da kullun suna aiki da aminci har zuwa mashaya 20 (290 psi), belun kunne na musamman masu ply-ply ko hydroformed na iya jure matsin lamba fiye da mashaya 69 (1,000 psi). Bugu da ƙari, waɗannan hatimin suna kiyaye bin diddigin fuska mai ɗorewa a saurin saman shaft har zuwa mita 25 a kowace daƙiƙa (ƙafa 5,000 a minti ɗaya), wanda hakan ya sa suka dace sosaifamfunan centrifugal masu sauricikin buƙatahanyoyin masana'antu.

Dacewar Sinadarai, Ƙarfi, da Tsafta

Yanayin tsayayyen hatimin na biyu a cikin ƙirar bellows yana magance matsalar rataye elastomer - yanayin gazawa na farko a cikin hatimin turawa inda zoben O ke manne da sandar saboda lalacewar sinadarai ko gurɓataccen wuri. Wannan yana sa bellow ɗin ƙarfe ya dace sosai da ruwa mai tsananin zafin sinadarai, gami da acid mai ƙarfi, abubuwan narkewa, da mafita masu ƙarfi waɗanda ke kai hari ga mahaɗan halitta.

Lokacin da ake mu'amala da ƙwayoyin cuta ko slurries masu nauyin da ya kai kashi 10% na daskararru ta nauyi, ƙirar bellows masu juyawa suna amfani da ƙarfin centrifugal don ci gaba da jefa barbashi daga magudanar ruwa, suna hana toshewa. Duk da haka, ana buƙatar tsafta sosai yayin tsarin farko. Duk wani tarkace mai ƙarfi na ƙarfe ko sikelin bututu da aka makale tsakanin takaddun bellows masu tazara sosai yayin farawa na iya iyakance motsi na axial, haifar da yawan damuwa na gida, da kuma haifar da gazawar gajiya da wuri.

Yadda Hatimin Injin Karfe Yake Aiki

Tsarin tsarin hatimin ƙarfe yana canza yadda ake samun nauyin fuska da daidaita daidaiton ruwa a cikin akwatin cika famfo. Ba kamar hatimin turawa waɗanda suka dogara da maɓuɓɓugan coil daban-daban ba, sashin bellow mai ci gaba yana rarraba nauyin bazara daidai gwargwado a cikin digiri 360 na fuskar hatimin, yana inganta fim ɗin ruwa tsakanin abubuwan da ke juyawa da waɗanda ba sa tsayawa.

Idan aka kwatanta da Pusher Seals, Aiki

Wannan nau'in kaya iri ɗaya yana shafar daidaiton motsin fuskokin hatimi a ƙarƙashin yanayi daban-daban na hydraulic. Kawar da elastomer mai zamiya shine mafi mahimmancin bambance-bambancen lokacin kimanta aiki.

Ta hanyar kawar da zoben O mai motsi, hatimin bellow yana kawar da fretting na shaft. Fretting yana faruwa ne lokacin da ƙananan motsi na elastomer suka yi amfani da hannun famfo akan lokaci, wanda ke haifar da maye gurbin shaft mai tsada da kuma hanyoyin ɓuɓɓuga a ƙarƙashin hatimin.

Zubar da ruwa, Juyawa, da Aminci

Daidaitawar ruwa ta hanyar amfani da na'urar haƙa ƙarfe tana da alaƙa da ƙirar bellon ƙarfe mai gefuna, wanda aka cimma ta hanyar sanya diamita mai inganci na bellon dangane da fuskar hatimi. Wannan daidaitaccen rabon daidaito (wanda aka ƙera tsakanin 0.65 da 0.80) yana rage samar da zafi da lalacewa ta hanyar gogayya, wanda ke rage yawan zubar da ruwa zuwa matakan da ba za a iya gano su ba a ƙarƙashin aikin da aka saba yi akai-akai.

Ana sarrafa watsa wutar lantarki kai tsaye ta tsakiyar bellows ko kuma ta hanyar amfani da na'urori na musamman a cikin aikace-aikacen matsin lamba mai ƙarfi, don tabbatar da cewa ƙarfin farawa ba ya karkata ko yanke takaddun ƙarfe. A cikin aikace-aikacen matatun mai zafi, maye gurbin hatimin turawa da ya gaza da hatimin bellows na ƙarfe da aka ƙayyade akai-akai yakan tsawaita Matsakaicin Lokaci Tsakanin Failure (MTBF) daga mummunan lokaci na watanni 8 zuwa 12 zuwa sama da watanni 36, wanda ke ba da babban ƙaruwa a cikin amincin kayan aiki gabaɗaya.

Yanayin Aiki Da Ya Bada Damar Amfani Da Shi

Zaɓar hatimin ƙarfe ba kasafai ake amfani da shi a matsayin zaɓi na asali ba don amfani da ruwa mai sauƙi saboda hauhawar farashin jari na farko. Maimakon haka, haɓakawa ne na dabara da aka yi amfani da shi lokacin da takamaiman yanayin aiki masu tsauri ke sa hatimin turawa ya yi tasiri ta hanyar injiniya ko sinadarai.

Zafin jiki mai yawa da ƙasa, injin tsotsa, da kuma man shafawa mara kyau

Matsanancin zafi shine babban abin da ke haifar da ƙayyadaddun bellows. A cikin aikace-aikacen cryogenic da ke sarrafa nitrogen mai ruwa ko LNG a yanayin zafi ƙasa da -196°C (-320°F), elastomers suna gaza nan take. Akasin haka, a cikin tsarin ruwa mai canja wurin zafi ko ƙasan matatun mai da ke aiki akai-akai a 350°C zuwa 425°C, elastomers na halitta suna narkewa ko kuma suna carbonize. Belas ɗin ƙarfe suna kiyaye daidaitaccen saurin bazara na injiniya da kuma ingancin rufewa a duk wannan yanayin zafi.

Bugu da ƙari, a cikin aikace-aikacen injin tsotsawa zuwa ƙasa zuwa 0.1 bar gaba ɗaya, ko kuma tsarin da ke fama da bushewar ruwa akai-akai da rashin kyawun man shafawa, ingantaccen ɗaukar nauyin fuska iri ɗaya na bellows yana taimakawa wajen kiyaye fim ɗin ruwa mai mahimmanci. Wannan yana hana mummunan lalacewar fuska da fashewar zafi wanda yawanci yakan faru lokacin da hatimin turawa ya rasa shingen man shafawa.

Ruwan da ke lalata muhalli, Hadarin Coking, da kuma Motsin Shaft

Ruwan da ke yin polymerize ko coke bayan fuskantar yanayin zafi na yanayi—kamar manyan hydrocarbons, kwalta, da ƙasan ɗanyen mai—yana haifar da haɗari mai tsanani ga hatimin da aka saba amfani da su. Yayin da waɗannan ruwan ke zubar da ƙwayoyin carbon a fuskokin hatimin kuma suna sanyaya, suna samar da ma'ajiyar carbon mai ƙarfi. A cikin hatimin turawa, wannan coking yana hana motsi na O-ring mai ƙarfi, yana haifar da gazawar hatimin nan take. Hatimin ƙarfe mai ƙarfi, wanda ba shi da elastomers masu zamiya, yana ci gaba da bin diddigin fuskar hatimin ko da lokacin da coking mai matsakaici ya faru a gefen yanayi.

Bugu da ƙari, bellows ɗin na iya ɗaukar motsi mai mahimmanci na shaft na axial - sau da yawa har zuwa +/- 2.0 mm - wanda faɗaɗa zafin shaft na famfo ke haifarwa a cikin ayyukan zafi mai yawa. Yana ɗaukar wannan canjin girma ta hanyar lanƙwasa haɗin welded ba tare da lalata gibin rufewa ko girgiza hannun shaft ba.

Iyakoki, Yanayin Rashin Nasara, da Canja-canje

Duk da ƙarfin ƙarfinsu, hatimin ƙarfe na bellow yana da iyakoki daban-daban na aiki da kuma musayar kuɗi. Babban yanayin gazawar shine yankewa mai juyawa; idan fuskokin hatimin sun manne tare saboda lu'ulu'u na samfur yayin rufe famfo, ƙarfin juyawa lokacin farawa zai iya yage haɗin da aka haɗa nan take.

Bugu da ƙari, takaddun ƙarfe masu siriri (yawanci daga 0.10 mm zuwa 0.15 mm kauri) suna da matuƙar saurin kamuwa da gajiya daga girgizar kayan aiki. Matakan girgiza da suka wuce 4.5 mm/s RMS na iya haifar da sautin harmonic, wanda ke haifar da karyewar walda cikin sauri. A ƙarshe, kashe kuɗi babban ciniki ne, tare da hatimin ƙarfe da aka haɗa da gefuna galibi suna buƙatar ƙimar farashi na 1.5x zuwa 3.0x fiye da hatimin turawa na yau da kullun, wanda ke buƙatar hujja bayyananniya ta riba akan saka hannun jari bisa ga tsawaita lokacin aiki.

Yadda Ake Ƙayyadewa da Shigar da Hatimin Injin Karfe Bellows

Nasarar amfani da hatimin ƙarfe mai ƙarfi ya dogara sosai kan takamaiman kayan aiki da kuma ingantattun hanyoyin shigarwa. Saboda an ƙera waɗannan hatimin ne don yin aiki mai tsanani, rashin ingantaccen aikin ƙarfe ko rashin daidaitaccen tsarin injin zai kawar da fa'idodin aikinsu cikin sauri.

Kayan Aikin Ƙarfe, Kayan Fuska, da Tsarin Hatimi

Dole ne a daidaita ƙarfin ƙarfe na tsakiyar bellows da ruwan aikin. AM350 bakin ƙarfe shine ma'aunin amfani da zafin jiki mai yawa, yana ba da kyakkyawan juriya ga walda da gajiya. Don yanayin da ke da tsatsa wanda ya haɗa da chlorides ko acid mai tsami (H2S), injiniyoyi suna haɓakawa zuwa Alloy C-276 (Hastelloy) ko Alloy 718 (Inconel), waɗanda ke ba da juriya mai kyau ga tsatsa da tsatsa.

Haɗakar fuskokin hatimi yawanci suna haɗa zoben Silicon Carbide (SiC) mai tsayawa akan zoben Carbon Graphite mai yawan juyawa don ingantaccen maiko. Duk da haka, ayyukan gogewa masu ƙarfi na iya buƙatar haɗin gwiwa mai ƙarfi kamar SiC da Tungsten Carbide (TC). Ana tsara saitunan ta hanyar ƙa'idodin API 682, tare da Tsarin 1 (hatimi ɗaya) da ake amfani da shi don ruwa mai zafi mai yawa, da Tsarin 2 ko 3 (hatimi biyu marasa matsi ko matsi) da aka wajabta don mahaɗan halitta masu haɗari ko masu canzawa (VOCs).

Shigarwa, Daidaitawa, Farawa, da Kulawa

Tsarin hatimin harsashisun zama mizani na masana'antu, suna lulluɓe bellows, fuskoki, da farantin gland zuwa naúrar guda ɗaya, wacce aka riga aka saita wanda ke kawar da buƙatar ma'aunin saita hannu akan shaft ɗin famfo. A lokacin shigarwa, dole ne a tabbatar da kwararar shaft ɗin famfo sosai; jimlar karanta alamar (TIR) ​​bai kamata ta wuce 0.05 mm (inci 0.002) ba don hana lanƙwasawa mai yawa da rashin daidaituwa na haɗa bellows.

Tsarin farawa don aikace-aikacen zafin jiki mai yawa yana buƙatar lokacin da aka tsara kafin dumamawa, sau da yawa ana amfani da na'urar API Plan 32 ta waje ko kuma na'urar kashe tururi ta API Plan 62. Dole ne a dumama akwatin famfo da ɗakin rufewa a matsakaicin zafin 50°C a kowace awa don hana girgizar zafi ga fuskokin silicon carbide masu rauni. Ci gaba da sa ido kan zafin ruwan da matsin lamba na ɗakin rufewa yana da mahimmanci don tabbatar da cewa ruwan ya kasance aƙalla 15°C ƙasa da matsin lamba na tururi, wanda ke hana walƙiya da bushewa a fuskokin hatimin.

Tsarin Yanke Shawara don Zaɓin Hatimi

Canjawa zuwa hatimin ƙarfe na injiniya yana buƙatar kimantawa mai tsari na yanayin aiki, tarihin gazawar, da jimlar kuɗin zagayowar rayuwa. Tsarin yanke shawara mai daidaito yana ba da damar yin amfani da tsarin yanke shawara mai inganci.injiniyoyin amincin masana'antudon tabbatar da kashe kuɗin babban birnin da gaskiya ta hanyar auna farashin farko na siye da tanadin aiki na dogon lokaci.

Jerin Abubuwan da Ake Bukata

Matrix mai zuwa yana aiki a matsayin babban jerin abubuwan da ake buƙata don tantance ko hatimin ƙarfe shine mafita ta fasaha da ake buƙata don tsarin famfo.

Idan aka cika wani sharaɗi guda ɗaya a cikin wannan jerin abubuwan da aka lissafa, iyakokin ƙira na hatimin turawa na yau da kullun na iya haifar da gazawar da wuri, wanda ke sa ƙirar bellows ta zama zaɓi mai kyau a fannin fasaha da kuɗi.

Hadari, Biyayya, Lokacin Aiki, da Kudin Sauyawa

Bayan ƙayyadaddun bayanai na fasaha, shawarar dole ne ta ƙunshi rage haɗari, bin ƙa'idodin muhalli, da kuma cikakken lokacin aiki na shuka. A cikin yankunan da ƙa'idodin muhalli masu tsauri ke iko da su, hatimin ƙarfe mai gefuna da aka haɗa da gefuna suna taka muhimmiyar rawa wajen rage hayakin da ke fita daga muhalli, suna kiyaye ƙimar zubar da sinadarai masu canzawa (VOC) a cikin aminci ƙasa da ƙa'idar ƙa'idar 500 ppm da EPA da ƙungiyoyin duniya suka tsara.

Duk da cewa farashin harsashin bellow na farko zai iya kasancewa daga $2,500 zuwa $8,000 dangane da aikin ƙarfe da girman shaft, binciken kuɗi dole ne ya yi la'akari da farashin da za a iya kauce masa idan aka daina aiki. A cikin masana'antu masu ci gaba kamar tace mai kosarrafa man fetur, lalacewar famfo ɗaya zai iya haifar da asarar samar da kayayyaki fiye da dala $10,000 a kowace awa. Ta hanyar kawar da lalacewar elastomer, hana girgiza shaft, da kuma tsira daga yanayin zafi, hatimin ƙarfe na ƙarfe yana rage yawan fashewar famfo sosai. A ƙarshe, idan aka yi amfani da shi a yanayin da ya dace na aiki mai tsanani, jimillar kuɗin mallakar (TCO) na hatimin ƙarfe na ƙarfe ya yi ƙasa da na hatimin turawa a tsawon shekaru biyar.

Muhimman Abubuwan Da Ake Ɗauka

• Mafi mahimmancin ƙarshe da dalilan da suka sa aka yi amfani da hatimin ƙarfe mai siffar ƙarfe
• Takaddun shaida, bin ƙa'idodi, da kuma binciken haɗari waɗanda suka cancanci a tabbatar kafin a yi alƙawarin
• Matakai masu amfani da gargaɗi na gaba za su iya amfani nan take

Tambayoyin da Ake Yawan Yi

Yaushe ya kamata in zaɓi hatimin ƙarfe na bellow mechanical?

Yi amfani da shi lokacin da famfo ke fuskantar yanayin zafi mai tsanani, sinadarai masu ƙarfi, saurin shaft mai yawa, ko lokacin da zoben O-ring na elastomer suka gaza saboda toshewa ko damuwa.

Wane irin zafin jiki ne hatimin ƙarfe zai iya riƙewa?

Tsarin da aka yi da gefuna ɗaya-ɗaya na yau da kullun da aka yi da walda suna ɗaukar kimanin -75°C zuwa 400°C, wanda hakan ya sa suka dace da ayyukan cryogenic da zafi mai yawa.

Shin hatimin ƙarfe ya fi kyau ga famfunan sinadarai da na solvent?

Eh. Hatimin ƙarfe mai tsaurin kai yana hana harin elastomer, don haka suna aiki da kyau a cikin acid, solvents, da kuma ayyukan caustic.

Shin hatimin ƙarfe na injina zai iya aiki a cikin slurry ko kuma kayan da ke ɗauke da daskararru?

Haka ne, musamman ƙirar bellows masu juyawa don kafofin watsa labarai masu kusan kashi 10% na daskararru, amma dole ne a cire tarkacen ƙarfe da sikelin bututu.

Shin Victor Seals zai iya samar da hatimin ƙarfe na maye gurbin samfuran famfon OEM?

Eh. Victor Seals yana samar da hatimin OEM masu dacewa da kuma maye gurbin samfuran kamar IMO, Alfa Laval, Grundfos, APV, Flygt, Fristam, Lowara, da Allweiler.