Aia kekahi ʻokoʻa ma waena o WC6 a me WC9 mea valve, ma hea kahi ʻokoʻa?

Aia kekahi ʻokoʻa ma waena o WC6 a me WC9 mea valve, ma hea kahi ʻokoʻa?

ʻO ka ʻāpana koʻikoʻi o ka valve ka kahe kahe a me ka cavitation coefficient o ka valve, i loaʻa maʻamau i ka ʻikepili o nā valves i hana ʻia ma nā ʻāina ʻoihana holomua, a paʻi pū ʻia i ka hāpana. Hoʻokumu ko mākou ʻāina i ka valve ʻaʻole i loaʻa kēia ʻike ʻike, no ka mea, e kiʻi i kēia ʻāpana o ka ʻikepili pono e hana i ka hoʻokolohua e hiki ai ke kau i mua, ʻo ko mākou ʻāina kēia a me ka pae kiʻekiʻe o ka honua o ka valve gap kekahi o ka hana nui. .
A, ka helu kahe o ka valve
ʻO ke kahe kahe o ka valve he ana ia o ka helu helu hiki ke kahe o ka valve, ʻoi aku ka nui o ka waiwai coefficient kahe, ke kahe o ka wai ma o ka pahu i ka wā e liʻiliʻi ai ka poho kaomi.
E like me ke kumu helu helu KV
Kahi: KV — koena kahe Q — kahe leo m3/h δ P — pahu poho puʻe puʻupuʻuP — ʻano wai kg/m3
ʻElua, ka helu ʻana o ka valve cavitation
Hoʻohana ʻia ka waiwai cavitation coefficient δ no ka hoʻoholo ʻana i ke ʻano o ke kūkulu ʻana i ka valve e koho ai no ka mana kahe.
Kahi: H1 — kaomi mH2 — ʻokoʻa ma waena o ke kaomi o ka lewa a me ke kaomi mahu saturated e pili ana i ka mahana M δ P — ʻokoʻa ma waena o ke kaomi ma mua a ma hope o ka pahu M
ʻOkoʻa ka coefficient cavitation δ i ʻae ʻia ma waena o nā kiwi ma muli o kā lākou hoʻonohonoho like ʻole. E like me ka mea i hoikeia ma ke kii. Inā ʻoi aku ka nui o ka coefficient cavitation i helu ʻia ma mua o ka coefficient cavitation i ʻae ʻia, kūpono ka ʻōlelo a ʻaʻole e hiki mai ka cavitation. Inā he 2.5 ka helu cavitation i ʻae ʻia, a laila:
Inā δ > 2.5, ʻaʻole e hiki mai ka cavitation.
Ke 2.5 > δ > 1.5, hiki mai ka cavitation li'ili'i.
Ke δ ʻO ka hoʻohana mau ʻana i ka δ ʻAʻole i hōʻike ʻia nā ʻōkuhi maʻamau a me ka hana ʻana o nā valve i ka wā e hiki mai ai ka cavitation, e waiho wale i kahi i hiki ai ka palena hana. Ma o ka helu maluna ae ua maopopo. No laila, hana ʻia ka cavitation no ka mea e wikiwiki ana ka wai ma kahi ʻāpana o ka pauku emi i ke kaʻina o ke kahe, ua hoʻoheheʻe ʻia kahi ʻāpana o ka wai, a ʻo nā ʻōpū i hana ʻia a laila poha i ka ʻāpana ākea ma hope o ka valve, aia ʻekolu mau hōʻike:
(1) Halau
(2) vibration (hōʻino nui i ke kumu a me nā hale pili, ka hopena i ka haʻihaʻi luhi)
(3) Poino i nā mea waiwai (ka ʻino o ke kino valve a me ka paipu)
Mai ka helu ʻana i luna, ʻaʻole paʻakikī ke ʻike i ka pili nui o ka cavitation i ke kaomi H1 ma hope o ka valve. ʻO ka hoʻonui ʻana i ka H1 e hoʻololi maoli i ke kūlana a hoʻomaikaʻi i ke ʻano:
A. E hoʻokomo i ka valve haʻahaʻa ma ka laina.
B. E hoʻouka i kahi pā puka i loko o ka paipu ma hope o ka valve e hoʻonui i ke kū'ē.
C. Wehe ka puka valve a hoʻonui pono i ka waihona, kahi e hoʻonui ai i ka manawa no ka hāhā ʻana o ka ʻōpū a hoʻemi i ka ʻino o ka cavitation.
ʻO ka loiloi piha ʻana o nā ʻano ʻehā ma luna, ua hōʻuluʻulu ʻia ka valve puka, nā hiʻohiʻona nui o ka butterfly valve a me ka papa inoa o nā ʻāpana no ka maʻalahi koho. ʻElua mau ʻāpana koʻikoʻi e hana nui i ka hana valve.
Aia kekahi ʻokoʻa ma waena o nā mea valve WC6 a me WC9? He aha ka ʻokoʻa? Valve material WC6 a me WC9: ʻO WC6 a me WC9 he kila kila, ua like ko lākou mau waiwai mechanical, me ka ikaika tensile like, ka ikaika a me ka elongation ma ke ana wela.
WC6 a me WC9
ʻO ka WC6 a me ka WC9 he mau kila kila me nā ʻano mekini like ʻole a me ka ikaika tensile like, hāʻawi i ka ikaika a me ka elongation ma ka lumi wela.
ʻO ka ʻokoʻa ka ʻike o ka alloy. Hoʻohālikelike ʻia me WC6, WC9 ka nui o ka chromium a me ka molybdenum, no laila ʻoi aku ka maikaʻi o kona ikaika mechanical i nā wela kiʻekiʻe. Eia kekahi, ʻoi aku ka maikaʻi o ka WC9 e pale aku i ka ʻōpala.