[impahla eyomile] isikhungo samandla okusebenza ngokulungiswa kwevalvu eyinhloko i-DQW ingxenye yezindaba ezisebenzayo ze-rotary actuator

[impahla eyomile] isikhungo samandla okusebenza ngokulungiswa kwevalvu eyinhloko i-DQW ingxenye yezindaba ezisebenzayo ze-rotary actuator

I-valve yokuhlola i-valve esetshenziselwa ukuvimbela ukubuyela emuva kwemidiya kumapayipi namathuluzi. Ivalvu yokuhlola i-exhaust isethwe epayipini le-exhaust ngalinye le-heater yangaphandle ohlelweni lokubuyisela umusi wesethi ye-turbine yesitimu. Umsebenzi wayo ukuvala ipuleti le-valve ngokuzenzakalelayo lapho iyunithi ilahla umthwalo, ukuze kuvinjwe isitimu esiseceleni kwesisi se-heater kanye nepayipi le-steam inlet ukuthi lingaphindeli enjinini yesitimu futhi libangele ukuthi injini yesitimu igijime kakhulu ukuze kugwenywe. izingozi.
Ukugcinwa kwama-valve amakhulu
1. I-valve yokuhlola i-extraction
I-valve yokuhlola i-valve esetshenziselwa ukuvimbela ukubuyela emuva kwemidiya kumapayipi namathuluzi. Ivalvu yokuhlola i-exhaust isethwe epayipini le-exhaust ngalinye le-heater yangaphandle ohlelweni lokubuyisela umusi wesethi ye-turbine yesitimu. Umsebenzi wayo ukuvala ipuleti le-valve ngokuzenzakalelayo lapho iyunithi ilahla umthwalo, ukuze kuvinjwe isitimu esiseceleni kwesisi se-heater kanye nepayipi le-steam inlet ukuthi lingaphindeli enjinini yesitimu futhi libangele ukuthi injini yesitimu igijime kakhulu ukuze kugwenywe. izingozi.
I-valve yokuhlola i-exhaust yeyunithi ye-300MW engenisiwe i-valve yokuhlola i-swing elawulwa umoya, isakhiwo siboniswa esithombeni, futhi isakhiwo sesihlalo sokulawula esilawulwa umoya siboniswa esithombeni. Ngokuyinhloko yakhiwe umzimba we-valve, ipuleti le-valve, i-shaft, umkhono nokunye. Isihlalo sokulawula umoya sakhiwe nge-piston, i-cylinder block, induku yomnyango kanye ne-spring.
I-valve engabuyi ekukhishweni ekuqaleni kweyunithi evaliwe, kuwo wonke amaleveli e-heater aqala, ukukhipha okungahleliwe ukulawulwa kwe-pneumatic ye-valve yokudonsa komoya, i-piston rod ishayela ukuzungezisa kwengalo ye-rocker, umkhono we-shaft shaft we-valve yomkhawulo we-axis plate evulekile, ipuleti le-valve lisesimweni esikhululekile, ngokukhipha ingcindezi yesitimu ukuze uvule ipuleti le-valve, isitimu ngevalvu singene ku-heater.
Ngesikhathi sokusebenza okujwayelekile kweyunithi, ipuleti ye-valve yokuhlola igcinwa endaweni evamile evulekile ngenxa yomphumela wengcindezi yokukhipha. Lapho iyunithi ilahla umthwalo ukuze ume, umfutho we-steam wokudonsa uyancipha, ipuleti le-valve lincike esisindweni salo ngokushesha libuyele esihlalweni, i-valve izovalwa, ukuze kuvinjwe i-heater kanye nesimusi epayipini ukubuyela ku- i-steam turbine, ukufeza indima yokuvikela
Umsebenzi wokulungiselela ngaphambi kokulungiswa kabusha kwe-valve yokuhlola isizinda unokuqukethwe okulandelayo:
Ngemuva kokuthi INKONZO YOKUMISA IZIMPAHLA, UKUVIKELA KANYE NEmithombo yamandla neyomoya KUQHUBEKA, indawo yokungena komoya kanye nokuhlangana okuphumayo kwesihlalo sokulawula umoya kuzoxegiswa, izikhonkwane ezixhunywe nenduku ye-piston yesihlalo sokulawula kanye neleva ye-valve yokuhlola kufanele. zisuswe, futhi isihlalo sokulawula sizosuswa ngemva kokukhulula amabhawodi okulungisa esihlalo sokulawula futhi sibekwe ngobuningi. Bese, uqhubekela emsebenzini olandelayo.
1, ukuhlakazeka kwe-valve
(1) Okokuqala, maka ukuxhumana phakathi kwekepisi nomzimba we-valve ngomaka, bese ukhulula ibhawudi lekepisi ukuze ususe ikepisi.
(2) Khipha i-bearing, indandatho yokugcina uwoyela kanye ne-lever ohlangothini lokuxhuma lwe-lever shaft kanye nesihlalo sokulawula umoya, futhi ukubeke endaweni engashintshi.
(3) Khulula inadi lekhava yophawu olukhulu bese ukhipha indandatho enkulu yokucindezela.
(4) Ngemva kokwenza amamaki ahambisanayo, khulula amabhawodi okulungisa isisekelo esikhulu, susa isisekelo esikhulu, bese usibeka.
(5) Khipha i-lever shaft ne-bushing, futhi ukubeke.
(6) Khipha ubakaki omncane kanye nezinsiza ohlangothini lwe-shaft yengalo ye-rocker futhi ukubeke.
(7) Khulula inadi lokulungisa eringini encane yokucindezela, khipha indandatho encane yokucindezela, futhi ubeke ngobuningi.
(8) Ngemva kokwenza uphawu oluhambisanayo, khulula ibhawodi lokulungisa esembozweni se-flange, susa isembozo se-flange, bese usibeka.
(9) Susa ingalo ye-rocker kanye ne-spool, futhi uyibeke.
(10) Khipha ingalo ye-rocker kanye ne-spool, futhi uyibeke.
2, ukuhlolwa kwe-valve yokuhlanza
(1) Hlola umugqa wevalvu emzimbeni we-spool kanye ne-valve. Ulayini wevalvu akufanele ube namagrooves, izimbotshana kanye nemikhondo yendawo yokuvala ephambanayo ethinta ukusebenza kokuvala, futhi kufanele ixhumane ngokugcwele ngaphandle kokuphazamiseka. Uma kutholakala amaphutha athinta ukusebenza kokuvala, ukugaya nokunye ukwelashwa kufanele kwenziwe.
(2) Hlola ukuxhumana phakathi kwe-valve butterfly nengalo ye-rocker, lungisa igebe le-gasket nengalo ye-rocker phakathi kuka-1 ~ 1.2mm, akumele libe likhulu kakhulu noma libe lincane kakhulu, ngaphandle kwalokho kufanele lilungiswe. Ukuxhumana kwamantongomane phakathi kovemvane lwe-valve nengalo ye-rocker kufanele kuqine, ijoyinti yokushisela kufanele iphelele futhi ingaqhekeki, futhi igebe phakathi kwe-valve butterfly shaft neringi yengalo ye-rocker kufanele ihlangabezane nezidingo.
(3) Hlola ukuvuleka phakathi kwe-lever shaft, i-rocker shaft kanye nosayizi we-bushing kanye nengalo ye-cast kufanele ihlangabezane nezidingo, futhi ingaphezulu le-shaft ngayinye kanye nodonga lwangaphakathi lwe-bushing kufanele bushelelezi futhi luhlanzeke ngaphandle kwemigodi.
(4) Hlola ukupakishwa kwesembozo esikhulu sophawu kanye nesembozo se-flange, kufanele kuphelele, uma kunomonakalo kufanele kushintshwe.
(5) Hlola ukuthi indawo yokuvala yesivalo sevalvu kanye nomzimba we-valve kufanele iphelele, ingenazo izisele, ama-tracholes kanye nemihuzuko ethinta umphumela wokuvala.
(6) Hlanza futhi uhlole indawo yokuvala endaweni ehlangene yesekelo, ikhava ye-flange kanye nendlu yevalvu, kanye ne-gasket endala enamathiselwe endaweni yokuvala kufanele ihlanzwe futhi isuswe ngefosholo. Indawo yokuvala akumele ibe neziphambeko ezithinta umphumela wokuvala.
(7) Bonke okhiye nokhiye kufanele kuhlanzwe futhi kuxhunywe ngendlela efanele.
3, ukuhlanganiswa kwe-valve
Ngaphambi kokuthi i-valve ifakwe, ingaphezulu le-shaft ngayinye kanye ne-bushing kufanele igcotshwe nge-molybdenum disulfide powder kuze kucwebezele. Umhlangano kufanele wenziwe ngokophawu lomhlangano ngokulandelana kwe-disassembly. Amaphuzu alandelayo kufanele anakwe kunqubo yokuhlanganisa:
(1) Ngemva kokuba uvemvane lwe-valve luxhunywe nengalo ye-rocker, ukujiya kwe-gasket elungisayo bungashintshwa ukuze kuqinisekiswe ukuthi i-Engeli yesishintshi sovemvane ifika e-Engeli edingwa umenzi. Ngemva kwalokho, i-nati eliqinisayo kufanele libe nebala elishiselwe ngokuqinile ne-butterfly ye-valve.
(2) Lapho i-lever shaft, i-rocker shaft kanye nengalo ye-rocker zihlanganiswa, i-lever shaft kanye ne-rocker arm end, i-gasket yokulungisa ye-rocker arm shaft kanye nokuphela kwengalo ye-rocker kufanele kube negebe elingu-1 ~ 1.20mm.
(3) Lapho i-rocker shaft, i-lever shaft kanye nesisekelo nesembozo se-flange esixhunywe negobolondo le-valve kufakwa futhi kuqiniswa, kufanele kuqashelwe ekugcineni izimbazo ezimbili zigxile ukuze kuvinjwe iswishi yovemvane lwe-valve ukuthi ingaxegi noma ibambeke.
(4) Enqubweni yokupakisha kuzo zombili iziphetho, isenzo se-eksisi ngayinye (i-lever shaft, i-rocker shaft) kufanele kuqinisekiswe ukuthi iyaguquguquka futhi ayibambeki.
(5) Wonke ama-gaskets kufanele avuselelwe.
4, ukuhlakazeka kwesihlalo sokulawula
(1) ikhava engaphezulu yesihlalo sokulawula kanye ne-cylinder block, i-cylinder block kanye nesisekelo izimpawu zokuhlanganisa, susa amabhawodi amafushane kumabhawodi okubopha we-cylinder kanye nesisekelo, bese uwabeka.
(2) Khulula amantongomane amabhawodi amabili amade okubopha ngesikhathi esisodwa noma ngokwehlukana, futhi kuzokwenziwa kancane (ngokushintshana lapho kuxegiswa ngokulandelana) kuze kuxegiswe, futhi amabhawodi azolungiswa futhi abekwe.
(3) isembozo esingaphezulu sesihlalo sokulawula, i-cylinder block kanye nesisekelo kuyahlukaniswa, i-piston, induku yomnyango kanye nesiphethu kuyasuswa, futhi indawo ibekwe.
(4) Khipha iphinikhodi ye-cotter kanye ne-hexagonal groove nut, ukuze i-piston rod nepiston kuhlukaniswe, ukubekwa okugxilile.
(5) Hlola futhi uhlanze isihlalo sokulawula.
1) Hlola ukuthi udonga lwangaphakathi lwe-piston cylinder kufanele lube bushelelezi.
2) Hlola intwasahlobo yokucindezela i-cylindrical, bese ubhala ubude bentwasahlobo esimweni samahhala, ukuze uqhathanise nokugcinwa kwangaphambili (ngemuva).
3) Hlola induku ye-piston kanye ne-piston surface kufanele ibushelelezi.
4) Hlola indawo yokuvala yekhava engaphezulu, isilinda block kanye noxhumo lwesisekelo kufanele luqine, futhi luhlanze.
(6) Ukufakwa kwesihlalo sokulawula. Ukufakwa nokuhlanganiswa kabusha kwesihlalo sokulawula kufanele kwenziwe ngokuya ngesinyathelo esiphambene sokuhlakazeka, futhi amaphuzu alandelayo kufanele anakwe:
1) Ukubekwa uphawu kwe-O-ring ngayinye kuthathelwa indawo entsha, esikhundleni senjoloba ekwazi ukumelana nokushisa, uhlobo lokuvala indandatho;
2) udonga lwangaphakathi lomzimba we-cylinder kanye nobuso be-piston kufanele buboshwe ngamafutha we-silicone ukuze kuqinisekiswe ukugcoba;
I-3) Ngemva kokufakwa kwesihlalo sokulawula umoya, ukushaywa okungenalutho kwenduku ye-piston kuhlolwe ngomoya ocindezelweyo, okufanele kuhlangabezane nezidingo zomkhiqizi, futhi isenzo se-piston rod kufanele siguquguquke futhi siqhubeke ngaphandle kokunamathela okwenzekayo.
(7) isheke lilonke. Lungisa isihlalo sokulawula emzimbeni we-valve, bese uxhuma ne-lever ye-valve, xhuma isixhumi somoya esicindezelwe, bese wenza ukuhlola okuphelele. Izimfuneko:
1) Ngemva kokuhlangana nevalvu yokuhlola isizinda, ukuhamba kweswishi yomoya ecindezelwe kufanele kuhambisane nohambo olushiwo umenzi.
2) Enqubweni yokushintsha, isenzo sonke kufanele siguquke ngokuqhubekayo, ngaphandle kwento ebambekile.
I-3) Inkomba yokuvula ye-valve kufanele ihlolwe ngendlela efanele, futhi ukushintshwa kwesenzo kufanele kuhlolwe kanye nokulawula okushisayo. Isibonisi esivulekile nesiseduze sihambisana nenkomba yendawo yangempela ye-valve, futhi ukuqinisekiswa kuqediwe.
Okwesibili, i-valve yesicupho
1, ukwethulwa kwe
I-steam turbine drain system iyingxenye ebalulekile yesistimu eshisayo ye-steam turbine, ikakhulukazi, i-steam eyinhloko kanye ne-ontology ye-steam turbine kanye nama-valve omfutho ophezulu, inikeza i-steam drain pump turbine kanye namanye ama-valve okudonsa amanzi abalulekile, epayipini elifudumele, i-hydrophobic evamile. izidingo ngesikhathi esifanele, kanye nokusebenza okujwayelekile kweyunithi, ukusika i-valve ukuze ithembeke, akukho ukuvuza. Uma lezi zicupho zivuza, umthelela ekusebenzeni kahle kweyunithi usobala kakhulu.
Ngenxa yalokhu, ukwethulwa kweyunithi ye-300MW ye-steam turbine unit yamanye amavalvu okudonsa amanzi abalulekile angamavalvu athunyelwa kwamanye amazwe, ukwakheka kohlobo lokulawula igesi yokusebenza kwevalvu yokunqamula izikhundla ezimbili. I-valve yembulunga inezinzuzo zesakhiwo esilula, ukubekwa uphawu okuhle nokugcinwa kahle. I-valve yembulunga ifakwe indlela yokulawula umoya, eyenza i-valve isebenze ngokushesha futhi iphendule, futhi ingahlangabezana kangcono nezidingo zeyunithi ezishintshayo. Ingxenye yokulawula umoya iwumkhiqizo wenkampani yaseMelika i-VALTEK, kanti ingxenye yomzimba we-valve iwumkhiqizo wenkampani yaseMelika ONVAL. Isakhiwo se-valve siboniswa emfanekisweni, futhi isakhiwo sedivayisi yokulawula umoya siboniswa esithombeni.