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Paʻa i ka pahu puka puka i ka wāʻO nā pumps Centrifugalhoʻokomo ka hana i nā pilikia ʻenehana he nui.
ʻO ka hoʻololi ʻana i ka ikehu ʻole a me ke ʻano thermodynamic
- 1.1 Ma lalo o ke kūlana paʻa o ka piʻi ʻana o ka wela waena, aneane pau ka ikehu hoʻokomo i ka ikehu wela. ʻAʻole hiki i ka mea waena ke lawe i ka wela, e piʻi nui ai ka mahana o ka lumi pamu. ʻO ka hana hoʻomau e hoʻoulu i ka vaporization o ka waena, e hoʻolalelale i ka carbonization o ka mea sila
1.2 Seal system in the environment of high temperature and vaporization of the medium, the mechanical seal e hilinai ana i ka lubrication and cooling of the medium e alakai i kona overheating hemahema - ka mechanical seal e maloʻo friction a me ka sila alo e puhi ia.
ʻO ke koʻikoʻi mechanical abnormal
- 2.1 Axial ikaika overrun ʻO ka ikaika axial o ka valve pani maʻamau he 1.5-5 mau manawa o nā kūlana hana maʻamau, a hiki ke piʻi a ʻoi aku paha ka haʻahaʻa haʻahaʻa i kona palena palena, e hopena i ka ʻāpana o ka hale paʻa a i ʻole ka deformation o ka hale.
2.2 ʻO ka ʻokoʻa o ka hoʻonui wela i hoʻokumu ʻia e ke kiʻekiʻe e alakaʻi i ka deformation thermal a i ʻole ke koʻikoʻi wela, ka ʻokoʻa ma waena o ka impeller a me ka hale pahū, a me ka mana o ka ukana hydraulic pono ʻole, ka mea e hōʻino ʻia ai ke koena ikaika o ka rotor, piʻi ka haʻalulu, a nāwaliwali nā ʻāpana.
ʻO ka cavitation a me ka pōʻino waiwai
3.1 Hāʻawi NPSH inverted medium vaporization [e hoʻohaʻahaʻa i ka ʻae cavitation (NPSHa) o ka mea ma mua o ka NPSHr pono o ka paila], e hana ana i nā ʻōpū, a ʻo ka hawewe haʻalulu i hana ʻia e ka hāʻule ʻana o nā ʻōpū hiki ke hiki i 690MPa, ka hopena i ka lua a me ka honeycomb spalling o ka mea holo impeller
3.2 Hoʻohaʻahaʻa ʻia ka hana metallographic No nā mea hoʻolele kila kuhili ʻole austenitic, hiki ke ʻike ʻia ma nā wela kiʻekiʻe kūloko, a e piʻi aʻe ka nui o ka corrosion intergranular a emi ka ikaika tensile. No nā impellers carbon steel, ʻoi aku ka nui o nā pilikia i nā wela kiʻekiʻe, e like me ke kiʻekiʻe-mehana oxidation a me ka decarburization, ka hopena i ka emi ʻana o ka ikaika o ka ʻili a me nā kulekele ākea; Inā loaʻa nā mea haumia e like me ka sulfur a me ka phosphorus, maʻalahi ka hoʻokaʻawale ʻana ma nā palena o ka palaoa i nā wela kiʻekiʻe, e hoʻoulu ai i ka brittleness thermal a me ka maʻalahi i ka wā e hana ai; Ma lalo o ka lōʻihi lōʻihi wela wela, kalapona kila i ilihune kolo, a kūloko kiʻekiʻe wela ke hoʻokēʻai deformation, i ka hopena e alakai i ka impeller haʻihaʻi a luhi luhi.
Palekana pūnaewele a me nā pilikia waiwai
4.1 ʻOi aku ka nui o ke kaomi ʻana o ka puʻupuʻu i ka palena a me ka hana ʻana o ka valve pani e hiki ai i ke kaomi puka o ka paila ke hiki i 120-150% o ka waiwai i helu ʻia, a aia ka pilikia o ka haki ʻana i ke kaomi i hoʻonohonoho ʻia o ka valve palekana, hiki ke hoʻoulu i ka hoʻokuʻu ʻana a i ʻole ka haki ʻana o ka weld pipeline.
4.2 E hoʻohana i ka ikehu a me ka mālama koina piʻi 'ana o ka Valve pani 'ana i ka "killer kūlana" o centrifugal pumps, i nui hoʻonui ikehu hoʻohana i loko o ka pōkole wā, a me ka lōʻihi-makahiki hana e alakai i malignant poino i ka lako, a me ka piha mālama koina hiki ke hoʻonui ma 3-10 manawa.
ʻO ka pōʻino o nā kūlana hana media kūikawā
No ka media volatile (e laʻa, LPG), e hoʻolōʻihi ka hana o ka pahu pani i ka vaporization o ka pae wai, a ʻo ke kahe wai-wai ʻelua i loko o ke keʻena pamu e hoʻololi koke i nā loli, e hopena i nā oscillations manawa o nā mana axial a me ka wikiwiki i ka lole o nā mea.
ʻO kaʻikeʻoihana a me nā koi maʻamau
6.1 ʻIke Hana E like me ka ʻike noiʻi ʻenekinia maoli, ʻaʻole ʻoi aku ka palena o ka manawa holo o ka valve centrifugal pump ma mua o 2 mau minuke, a ua kaupalena ʻia i ka minuke 1. Manaʻo ʻia e hoʻonohonoho i kahi ʻōnaehana hoʻokele interlock e hoʻomaka ʻokoʻa i ka papahana pale pani i ka wā e pani ai ka pahu puka puka a hoʻonui i nā manawa.
6.2 Pono ka kikoʻī maʻamau i ka API 610 12th Edition maʻamau e hōʻike ana i kekahi mau mea ikaika nui, integrally geared a multistage pumps e piʻi wikiwiki ka wela i ka wā e pani ʻia ai ka pahu puka puka, ʻo ia ka mea hiki ʻole ke hoʻāʻo a/a ʻaʻole palekana ke pani ʻia ka pahu. Pili loa ka piʻi ʻana o ka wela i ka mana. ʻO ka mana PD, hiki ke hoʻohālikelike ʻia e like me:
P: helu mana no kēlā me kēia pae i ka wai i hp (a i ʻole MW)
D imp: Ua helu ʻia ke anawaena o ka impeller i loko (a i ʻole m)
D nozzle: Nominal out out flange diameter in in. (a i ʻole m). No ka hoʻomohu ʻelua, nā pāpaʻi hoʻokahi, ʻo ka D nozzle ke anawaena flange inlet.
ʻO ka waiwai koʻikoʻi maʻamau no PD he 0.286 hp/in.3 (13 MW/m3), ma waho aʻe o ia mea e ʻōlelo ʻia ʻaʻole e holo i ka pamu me ka pani puka puka i ka wā o ka hoʻāʻo ʻana.
Ka manawa hoʻouna: Jun-04-2025