Cov ntaub ntawv siv hauv Weichai cav roj twj yog feem ntau ua haujlwm rau kev xa cov roj- raws li kev tshaj tawm xws li roj av, roj dav hlau, roj av, thiab roj av. Kev xaiv cov khoom yuav tsum xav txog ntau yam xws li cov khoom nruab nrab, kev ua haujlwm, kev muaj peev xwm ntawm kev lag luam, thiab cov qauv kev lag luam.
Yam tseem ceeb cuam tshuam rau kev xaiv cov khoom
Cov khoom nruab nrab
Corrosiveness: Corrosion-cov ntaub ntawv resistant yuav tsum tau thaum tuav cov kua qaub, alkali, ntsev, los yog sulfur{1}} muaj cov xov xwm.
Cov Khoom Muag Khoom: Hnav- cov ntaub ntawv resistant (xws li, siab-chromium cam khwb cia hlau los yog nto- hardened alloys) yog qhov tsim nyog yog qhov nruab nrab muaj cov khoom abrasive.
Yuav tsum muaj kev huv huv: Khoom noj khoom haus- qib stainless hlau (xws li 304/316L) lossis tsis yog- cov khoom siv hlau (xws li, fluororubber seals) yuav tsum raug xaiv rau cov khoom noj lossis tshuaj siv.
Qhov kub thiab txias
Tsawg kub (< -20°C): Avoid material embrittlement; recommend Class II materials (e.g., low-temperature cast steel or austenitic stainless steel).
High Temperature (>200℃: Ua ntej siab -kub alloys (piv txwv li, 40CrMnMoNi, ZG230-450 cam khwb cia hlau) lossis tshwj xeeb stainless hlau (xws li, 904L).
Siab thiab taub hau
High-pressure service (>1.6MPa): Siv cov khoom siv siab -lub zog (xws li, cam khwb cia hlau ZG230-450, alloy steel 40Cr).
Siab ib leeg -theem taub hau: Yuav tsum muaj cavitation- cov ntaub ntawv resistant (xws li, duplex stainless hlau los yog tungsten carbide nto txheej).
Economy thiab Machinability
Cam khwb cia hlau (HT200) muab tus nqi qis, tsim nyog rau cov uas tsis yog -corrosive media thiab tej yam kev mob.
Cheebtsam uas yuav tsum tau muaj siab weldability (xws li, twj tso kua mis casings) yuav tsum siv tsawg - carbon steel los yog austenitic stainless hlau.
Core Component Material Xaiv
Impeller thiab Pump Casing
Corrosive media: Austenitic stainless hlau (0Cr18Ni9 / SS304) lossis duplex stainless hlau (2205).
Siab -kub / siab- siab: Cam khwb cia hlau (ZG230-450) los yog hlau alloy (40CrMnMoNi).
Particulate-laden media: Siab-chromium cam khwb cia hlau los yog nto-hardened alloys.
Pump Shaft thiab Bearings
Cov xwm txheej txheem: Carbon steel 45 (tsis yog -corrosive) lossis martensitic stainless hlau (2Cr13/3Cr13).
Siab -Load condition: Alloy steel (40Cr) lossis nitrided steel.
zawv zawg bearings: Babbitt alloy lossis tooj liab alloy (hnav-resistant).
Sealing Devices
Mechanical seals: Silicon carbide/ceramic rings (siab{0}}kub resistant), PTFE (corrosion-resistant).
Ntim cov ntsaws ruaj ruaj: Graphite-impregnated fiber (acid/alkali resistant) los yog fluororubber (siab-kev pabcuam kub).
Kev lag luam Standards thiab Specifications (API 610)
Kev Xav Tau
Pump lub cev / npog: Cam khwb cia hlau (HT250) rau kev pabcuam dav dav; carbon hlau (ASTM A216 WCB) rau kev kub siab; stainless hlau (316/904L) rau corrosive media.
Shaft and Impeller: Must meet hardness (HRC 25-35) and tensile strength (>550 MPa) yuav tsum tau.
Cov xwm txheej tshwj xeeb
Acid Environments: Xaiv cov ntaub ntawv uas tiv taus hydrogen sulfide corrosion (xws li, duplex stainless hlau) raws li NACE MR0175 tus qauv.
Siab - Cov Roj Kub Kub: Ua ntej cam khwb cia hlau lossis hlau alloy los tiv thaiv kev nkag tsis tau hauv cov hlau cam.
