Xa impompo ye-hydraulic ingaphumeleli kwi-oyile ye-offshore rig-okanye ivalve yepiston ibambe ngaphakathi kwimpompo yekhonkrithi enoxinzelelo oluphezulu-unobangela osisiseko awufane ube uyilo. Iyanxiba. Kwaye ayisiyiyo nayiphi na into yokunxiba: i-micro-pitting, i-galling, kunye nokhukuliseko olubi phantsi kwemithwalo ye-cyclic engaphezu kwe-300 MPa. Siyibonile kwindawo kumaqonga oLwandle lwaseNorway eNorth Sea nakwi-Southeast Asian dredging nqanawa-apho ukusilela komkhono omnye weStellite kuvala ukusebenza iiyure ezingama-48+. Yiyo loo nto iinjineli zingabuzi ukuba "Ngowuphi owona mkhono unexabiso eliphantsi?" Babuza ukuba, "Ngubani onokuhambisa imikhono ye-cobalt ye-AMS ye-5387-grade ene-≤± 0.015 mm yokunyamezela ukujikeleza, ukulandelwa konyango olushushu, kunye nobomi obuqinisekisiweyo bentsimi ngaphaya kweeyure zokusebenza ze-12,000?"
Kutheni "ifektri yeStellite sleeve" ingelogama nje lokukhangela-sisihluzo esicacisiweyo
"Imizi-mveliso ye-Stellite sleeve" ibonakalisa ngaphezu kwesakhono sokuvelisa. I-shorthand yoqeqesho lwe-metallurgical, ukuchaneka komatshini, kunye nolwazi lwendlela yokusilela. I-Stellite alloys-ingakumbi i-Stellite 6 (AMS 5387) kunye ne-T800-ayenziwe njengentsimbi engenasici. I-matrix yabo ye-cobalt-chromium-tungsten ixhathisa izixhobo zokusika, i-work-hardness, kwaye ifuna ukuzinza kwe-thermal ngexesha lokugaya. Yinyani Umzi-mveliso we-Stellite sleeve kufuneka ilawule izinto ezintathu eziguquguqukayo ezingaxoxisiyo: ukuqinisekiswa kwezinto eziluhlaza (iingxelo zovavanyo lokugaya nge-ASTM F75 okanye i-AMS 5732), ukukhululeka koxinzelelo lwasemva komatshini ukuze kuthintelwe ukukhukuliseka kwe-dimensional, kunye nokuqinisekiswa kwengqibelelo yomphezulu-kungekhona nje ixabiso le-Ra, kodwa ukufunyanwa kwe-microcrack engaphantsi komhlaba ngokuvavanywa kokungena kwe-fluorescent.
Sivavanye ngaphezu kwababoneleli abangama-30 ababanga ubuchwephesha beStellite. Isiqingatha asikwazanga ukuvelisa i-ID ephindaphindwayo egqityiweyo ngaphantsi kwe-Ra 0.4 µm kwi-120-mm bore. Omnye uhanjiswe imikhono kunye ne-0.08 mm ngaphandle kwe-roundness-eyamkelekileyo kwiivalve eziphantsi koxinzelelo, intlekele kwiimpompo ze-axial piston. Umahluko ulele ekudityaneni okuthe nkqo: ukuphosa ulawulo lwesakhiwo sengqolowa, i-CNC toolpath optimization ye-cobalt alloys, kunye ne-in-process CMM ihlola kwinqanaba ngalinye-kungekhona nje ukuhlolwa kokugqibela.
Izakhono ezine ezahlula abavelisi bemikhono be-Stellite abaqeqeshiweyo kwiivenkile zentsimbi jikelele
Umzi-mveliso wokwenyani weStellite usebenza ekudibaneni kweendlela ezintathu: i-metallurgy, i-machining echanekileyo, kunye nokuqinisekiswa okusebenzayo. Nantsi into esiyiqinisekisayo ngaphambi kokuba sivume umthengisi:
- Ukulandeleka kwezinto eziphathekayo ukuya kwiqashiso le-ingot-kungekhona nje amanani ebhetshi, kodwa iingxelo zokubunjwa kweekhemikhali eziqinisekisiweyo ezihambelana ne-AMS 5387 spec (C: 0.9-1.4%, Cr: 27-31%, W: 3.5-5.5%, Co balance)
- I-Multi-axis ye-CNC yokukwazi ukuseta izixhobo ezingqongqo-akukho lathes eqhelekileyo; Sifuna isixhobo esiphilayo se-Y-axis kunye nokupholisa-nge-spindles ukulawula ukukhutshwa kwe-chip kunye nokuphazamiseka kwe-thermal.
- Ukudityaniswa konyango lobushushu-isisombululo se-annealing kwi-1175 ° C ± 10 ° C elandelwa ukupholisa komoya ngokukhawuleza, kuqinisekiswe ngobunzima bemephu kwiindawo ezinqamlekileyo (HRC 38-44, iyunifomu ngaphakathi kwe-± 2 amanqaku)
- Iziseko zovavanyo ezisebenzayo-hayi nje ukujongiwa komda, kodwa uvavanyo lwenkonzo olufanisiweyo: izilingo zokunxiba iiyure ezingama-500 ngokuchasene nokuqina kwe420SS counterfaces phantsi kwe-200 MPa yomthwalo wehydraulic
Ngaphandle kwezine, uthenga iinxalenye-hayi isiqinisekiso sokusebenza. Siye sabona imikhono idlula i-CMM kodwa yasilela emva kwemijikelo engama-800 kuba uxinzelelo olushiyekileyo lubangele i-micro-welding kwi-interface yesilayidi. Yiyo loo nto QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. ifakela i-metallurgists kwisicwangciso semveliso-kungekhona njengabacebisi, kodwa njengabanini benkqubo.
Iindleko ezifihliweyo zemikhono ye-Stellite "ye-off-the-shelf" kunye nendlela ijometri yesiko eyongeza ngayo ixabiso
Abanye abathengi bacinga ukuba imikhono yeStellite iyathengiswa. Akunjalo. Imilinganiselo ye-OD/ID ye-ID ayihoyi inkqubo yokwenyani: ukwandiswa kwe-thermal ukungahambelani phakathi komkhono kunye nendlu, ukulayishwa kwe-asymmetric kuyilo lwempompo ye-eccentric, okanye i-vibration-induced fretting kwi-flange joint. Sakhe satshintsha umkhono wegeneric kwimpompo eludaka lwasezimayini kunye nolunye uhlobo oluqhelekileyo olunokuphazamiseka kwetapered kunye nemijelo yeradial vent. Isiphumo: 3.2× ubomi benkonzo obude, ukuvuza kwetywina elingu-0, kunye nokupheliswa kwexesha lokuphumla elingacwangciswanga. Iindleko "zesiko" zaziphezulu nge-18%. I-ROI? I-$ 217,000 igcinwa ngonyaka emsebenzini, iinxalenye ezisecaleni, kunye nemveliso elahlekileyo.
Iifektri zeStellite zokwenyani azinqumli nje ukuze ziprinte-zigocagoca umsebenzi. Xa umthengi esithumelela umzobo we-GD&T, umbuzo wethu wokuqala awungowokuba "Singakwazi ukuwenza?" Ithi "Yeyiphi eyona ndlela imbi kakhulu yokungaphumeleli kolu kunyamezelana?" Loo ngqondo itshintsha incoko ukusuka kwixabiso ngeqhekeza ukuya kwiindleko ngeyure nganye yokusebenza.
Apho ukuchaneka kuhlangabezana nokuthembeka-kwaye kutheni iqala ixesha elide ngaphambi kokusikwa kokuqala
Umzi-mveliso weStellite sleeve ufumana ukuthembela hayi kwindawo egqityiweyo, kodwa kulawulo lwayo oluphezulu. Kwi-QINGDAO QIANGSENYUAN TECHNOLOGY, ukwamkelwa kwezinto ezibonakalayo kuqala ngohlalutyo lwe-spectrographic yayo yonke i-cobalt alloy bar engenayo. I-Machining isebenzisa i-ISO 2768-mK ukunyamezela njengesiseko-kungekhona njengento ekujoliswe kuyo, kodwa ubuncinane. Yonke imikhono ivavanywa nge-100% ye-ultrasonic ye-porosity yangaphakathi, emva koko i-profilometry ye-optical kwimephu ye-topography ye-5-µm. Ukupakishwa kokugqibela kubandakanya i-batch-specific certificates cover chemistry, hardness, data dimensional, kunye neerekhodi zovavanyo ezingonakaliyo-ezilandelwayo kwi-original melt.
Oku asikobunjineli obugqithisileyo. Kukunciphisa umngcipheko. Kuba xa isicelo sakho siqhuba kwi-15,000 psi kunye ne-abrasive-laden fluid, akukho thuba lesibini. Ufuna i Umzi-mveliso we-Stellite sleeve ephatha yonke into njenge-mission-ibaluleke kakhulu-hayi kuba isitsho kwiwebhusayithi, kodwa ngenxa yokuba inkqubo yabo ishiya indawo yokucinga. Lo ngumgangatho esiwubambeleyo-kwaye enye yeenjineli ziya zifuna.
