Vavhavha yekuisa chisimbiso pamusoro pekukuya nzira uye yekukuya chishandiso zvinodiwa vharafu yakakodzera tembiricha yekushanda uye chikamu chikuru chekusarudza zvinhu.

Vavhavha yekuisa chisimbiso pamusoro pekukuya nzira uye yekukuya chishandiso zvinodiwa vharafu yakakodzera tembiricha yekushanda uye chikamu chikuru chekusarudza zvinhu.

Valve sealing surface yakakamurwa kuva marudzi maviri endege uye conical sealing surface, iyo inofanira kunge yakadzika mukugadzira valve. Manual grinding of valve sealing surfaces kunoitwa uchingoshandisa zviri nyore kugaya. Kukuya nemaoko kunowanzo shandiswa kunyorova kukuya, mukuita kunyorova kukuya kazhinji kuwedzera yakaonda abrasive agent, kuitira kugovesa abrasive particles kubva panzvimbo yekushanda, uye kugara uchiwedzera matsva abrasive particles, kuitira kuti uwane yakakwirira yekukuya kushanda. Pakuisa chisimbiso kunoda kunyanya kukwenenzverwa uye kupera, dzimwe nguva jecha rakadzvanywa ndiro rinoshandiswa pakukuya yakaoma.
Zvinodiwa zvekushandisa zvinhu
Muchigadziro chekugadzira, pane zvinhu zviviri zvinodiwa zvezvinhu zvekugadzira gorosi: imwe ndeyokuti zvinhu zvekugadzira zvigadziro zvinofanira kuiswa nyore nyore muzviyo zvinoputika; Chechipiri, chigadziro chekushandisa chinofanirwa kukwanisa kuchengetedza geometric chimiro chakarurama chekugadzira chigadziro kwenguva yakareba.
Kuti zvimedu zvinoputika zvive nyore kuiswa, iyo yekukuya midziyo inofanira kuva yakanyorova kupfuura workpiece zvinhu. Asi zvakare kwete yakanyanya kupfava, zvikasadaro iyo abrasive ichave yakawanda kana yese yakamisikidzwa uye yakaderedzwa kana yakarasika yekucheka maitiro; Uye zvakapfava hofori zvinhu zvinozoitawo kuti chishandiso chekukuya chipfeke nekukurumidza. Kuti udzivise chigadziro chekukuya kubva pakurasikirwa kwayo kwejometri chaiyo nekuda kwekukurumidza kupfeka, chigadziro chekugadzira chigadziro chinofanira kuva nekudzivisa kupfeka kwakanaka, uye sangano rayo rinofanira kuva yunifomu. Kupfeka kwezvinhu zvine chimiro chakafanana zvakare yunifomu, iyo inobatsira kuchengetedza geometric chaiyo yechishandiso.
Pakukuya valve yekuisa chisimbiso pamusoro, iyo yekukuya chishandiso inoshandiswa kushandisa grey cast iron. Grey cast iron yekukuya chishandiso chakakodzera kukuya yekuisa chisimbiso pamusoro pezvinhu zvakasiyana siyana zvesimbi, inogona kuwana zvirinani kukuya mhando uye kugadzirwa kwepamusoro. Iyo yekuvharisa pamusoro pekukuya simbi yakakandwa, mhangura uye austenitic simbi isina tsvina inowanzogadzirwa negrey cast iron yeHB120-160. Grey cast iron HB150-190 inowanzo shandiswa pakuisa chisimbiso pamusoro pekukuya yakaoma alloy uye yakadzimwa simbi, uye inowanzoshandiswa grey cast iron mamakisi iHT150 uye HT1200.
Valve sealing surface grinding method
Valve sealing surface yakakamurwa kuva marudzi maviri endege uye conical sealing surface, iyo inofanira kunge yakadzika mukugadzira valve.
Valve sealing surface grinding method ine marudzi maviri ekukuya nema mechanical.
(1) Kukuya nemaoko kwevharuvhu sealing surface
Manual grinding of valve sealing surfaces kunoitwa uchingoshandisa zviri nyore kugaya. Kukuya nemaoko kunowanzo shandiswa kunyorova kukuya, mukuita kunyorova kukuya kazhinji kuwedzera yakaonda abrasive agent, kuitira kugovesa abrasive particles kubva panzvimbo yekushanda, uye kugara uchiwedzera matsva abrasive particles, kuitira kuti uwane yakakwirira yekukuya kushanda. Pakuisa chisimbiso kunoda kunyanya kukwenenzverwa uye kupera, dzimwe nguva jecha rakadzvanywa ndiro rinoshandiswa pakukuya yakaoma.
① Kukuya nemaoko kwendege yekuisa chisimbiso yemuviri wevharuvhu. Iyo valve body seal ndege iri muvhavha yemuviri mhango, kukuya kwakaoma. Kazhinji, dhisiki-yakaita dhisiki yekukuya ine skweya gomba inoshandiswa, iyo inoiswa pachisimbiso chepamusoro chemukati memhango, uye ipapo mubato wakareba une musoro wekona unoshandiswa kutyaira disk yekukuya yekukuya kufamba. Pane cylindrical boss kana gasket rinotungamira pakugaya kudzivirira mudziyo wekukuya kuti usasiye nzvimbo yekuvharisa mhete zvishoma panguva yekukuya uye kukonzera kusaenzana. Mufananidzo 8-6-5 unoratidza dhayagiramu YEKUkuya nemanyore YEMUviri wevhavhavha yegedhi nevharuvhu.
Mufananidzo 8. Kukuya nemaoko kwendege yemuviri 1 6 5
Usati wakuya pasi pechisimbiso ndege yemuviri wevhavha, chiso chekushanda chechigayo chekukuya chinofanira kupukuta neparafini kana peturu, uye iyo inobhururuka inobhururuka uye burr pamusoro pekuvhara pamusoro pemuviri wevhavha inofanira kubviswa, uye yozoputirwa nemucheka. yeabrasive panzvimbo yakavhara. Pestle mugomba remuviri, kuti unyatso kukwana panzvimbo yekuisa chisimbiso, wobva washandisa mubato wakareba kugadzira ndiro yepestle yenzira yakanaka uye yakaipa.
Turn movement. Tenderedza wachi 180 °, counterclockwise 90 °, zvichingodaro. Kazhinji, mushure mekutendeuka kanopfuura kagumi, zvimedu zveabrasive muabrasive agent zvakagomara, saka ndiro yekukuya inofanirwa kusimudzwa kazhinji kuwedzera abrasive agent.
Iyo yekukuya kudzvinyirira inofanira kunge yakafanana uye haifaniri kunge yakakura zvikuru. Dzvinyiriro yekutsvagisa yakashata inogona kuve yakakura: tsvakiridzo yakanaka inofanira kunge iri diki. Kuchenjerera kunofanira kubhadharwa kuti usashandise kumanikidza uye kuita kuti chigayo chekukuya chikamu kubva mundege yekuisa chisimbiso. Mushure mekugaya kwenguva yakati, kutarisa roughness ye workpiece. Panguva ino, unogona kubvisa pestle, kupukuta chisimbiso pamusoro neparafini kana peturu, wobva waisa zvinyoro nyoro dhisiki yekuongorora yakafuratira ndiro panzvimbo yekuvharisa uye zvinyoro nyoro uchikweva neruoko. Mushure mekutora ndiro yakafuratirwa, nzira dzekubata pane yekuvharisa chisimbiso dzinogona kucherechedzwa. Kana iyo chisimbiso chemhete ichiratidza kutariswa kwakaenzana, uye chiyero cheiyo radial yekuonana hupamhi kune yekuisa chisimbiso pamusoro pehupamhi (kureva, nzvimbo yekuisa chisimbiso uye bvunzo ndiro yezvinoitika) inosvika kukosha kwakatarwa mukuita, roughness inogona anorangarirwa kuva anokwanisa.
② Manual kugaya kwegedhi ndiro uye valve disc seal ndege. Ndege dzechisimbiso dzegedhi, disc uye chigaro zvinogona kugadzirwa nemaoko uchishandisa ndiro yekukuya. Pamberi pebasa, ndiro yakachena inoputirwa zvakaenzana nemucheka we abrasive, uye workpiece yakasungirirwa paplate uye inogona kutenderedzwa uye kufamba mumutsara wakarurama nemaoko, sezvinoratidzwa mumufananidzo 8-6-6, kana mumufananidzo. 8 kufamba. Iko kushanda kwekugaya kunogona kuvandudzwa nekuti nzira yekukuya inoshandurwa nguva dzose uye zvimedu zvinoputika zviri kugaya munzira itsva.
Mufananidzo 8. Manual kugaya kwechiso chekuvhara chegedhi 6-6
Kuti udzivise kusapfeka kusina kufanana kweplate yekukuya, usagara uchikuya pakati peplate, asi inofanira kugara ichichinja zvikamu pamusoro peplate, kana zvisina kudaro ndiro yekukuya ichakurumidza kurasikirwa nendege yakarurama.
Iyo DISC neiyo VALVE chigaro chakaoma wedge chimiro, chisimbiso ndege padenderedzwa rehuremu haina kuenzana, kukuya kunofanira kunge kuri kumucheto kwayo kwakatetepa (inozivikanwawo se "musoro mudiki") kuwedzera kudiki kudzvinyirira, kuitira kuti annular sealing ndege inomanikidza yunifomu. , kuitira kuti usakonzera workpiece wedge Angle kuchinja.
Throttle valve disc grinding inogona kushandiswa negomba mhete disk kugaya chishandiso, nzira yekukuya uye yekuisa chisimbiso chevharuvhu yakangofanana.
Taper sealing pamusoro pekukuya ruoko. Kukuya chisimbiso chetapered chinoda kushandiswa kwetsvimbo yakasvibiswa kana sleeve. Iyo TAPER YEPESTLE NEPESTLE SLEEVE ZVINOFANIRA NETEPI YEMUVHAVHU inosunga chiso chemuviri kana disc sealing face, zvichiteerana. Panofanira kunge paine spiral groove isina kudzika pakoni yetsvimbo yekukuya uye sleeve yekukuya yejongwe rinokuya muviri uye plug kuchengetedza yakawandisa abrasive agent. Paunenge uchikuya globe valve body, nokuti chisimbiso koni yakanyanyisa kupfupika uye kusagadzikana kusina kunaka, inowanzowedzerwa ndiro yekufambisa paflange inomira mumutumbi wevharuvhu kuchengetedza tsvimbo yekukuya yakagadzikana. Mufananidzo 8-6-7 unoratidza dhizaini yedhizaini yekukuya yemanyorero eiyo conical chisimbiso chepamusoro.
Mufananidzo 8-6-7 Kukuya nemaoko econical sealing surface
Paunenge uchikuya iyo conical yekuisa chisimbiso pamusoro, shandisa dhizaini yeabrasive agent yakaenzana pane yakapukuta yekukuya chishandiso, zvinyoronyoro uise pamusoro peiyo workpiece, wobva wadzvanya mudziyo wekukuya neruoko uye tenderera chishandiso chekukuya: mushure memavhiki matatu kusvika mana ekutenderera. , mudziyo wekukuya unogona kudhonzwa kuti uchinje denderedzwa risati rakuya. Abrasives inofanira kuwedzerwa kakawanda panguva yekukuya.
Iyo taper yetsvimbo yekukuya yejongwe rinokuya uye sleeve yekukuya yepuragi yekukuya inofanira kuenderana, zvikasadaro zvichave nyore kudonha pakati peiyo tapered seal surface mushure mekugaya.
Imwe yeakakosha kufunga mukugadzira vharafu uye kusarudzwa kwezvinhu ndiko kupisa kwekushanda kwevhavha. Kuti uenzanise kutonhora kwekushanda kwakakodzera kwechinhu chikuru chevhavha, kutonhora kwekushanda kwakakodzera uye zvinoenderana nezvinodiwa zvezvinhu zvikuru zvevhavha zvinotsanangurwa kubva kune zvinhu zvemhando dzakasiyana-siyana dzesimbi uye Nha. kuongororwa kwezvigadzirwa zvevharuvhu. Uye zvakare, kubva kuzvinhu zvehunyanzvi manejimendi, manejimendi ekugadzira uye kutenga zvinhu, iyo valve material ine yakanyanya kufanirwa sisitimu inosarudzwa.
1 muchidimbu
Imwe yeakakosha kufunga mukugadzira vharafu uye kusarudzwa kwezvinhu ndeye tembiricha yekushanda kwevharuvhu. Kuti uenzanise kutonhora kwekushanda kwakakodzera kwechinhu chikuru chevhavha, kutonhora kwekushanda kwakakodzera uye zvinoenderana nezvinodiwa zvezvinhu zvikuru zvevhavha zvinotsanangurwa kubva kune zvinhu zvemhando dzakasiyana-siyana dzesimbi uye Nha. kuongororwa kwezvigadzirwa zvevharuvhu. Uye zvakare, kubva kuzvinhu zvehunyanzvi manejimendi, manejimendi ekugadzira uye kutenga zvinhu, iyo valve material ine yakanyanya kufanirwa sisitimu inosarudzwa.
2.1 ** tembiricha vharafu zvinhu
** tembiricha vharafu [-254 (mvura hydrogen) ~ -101 ℃ (ethylene)] chinhu chikuru chinofanira kusarudza chiso centered cubic lattice austenitic Stainless simbi, mhangura alloy kana aruminiyamu alloy, yayo yakaderera tembiricha michina pashure kupisa kurapwa, kunyanya yakaderera tembiricha. kukanganisa kuoma kunofanirwa kusangana nezvinodiwa zveyero.
Aya anotevera austenitic simbi asina tsvina anogona kushandiswa kugadzira mavharuvhu anodziya. ASTM A351 CF8M, CF3M, CF8 uye CF3, ASTM A182 F316, F316L, F304 uye F304L, ASTM A433 316, 316L, 304, 304L uye CF8D (yakagadzirwa neLanzhou High Pressure G8Q kodhi, fekitori yeG9F8, fekitari yeG9F8). ** Muviri, chivharo, gedhi kana dhisiki revharuvhu inodziya inofanira kucheneswa mu nitrogen yemvura (-196 ℃) isati yapera.