I kēia manawa, hoʻohana pinepine nā pā ahi o nā mea hoʻololi a me nā reactors i loko o nā hale UHV kūloko i nā hale hoʻoheheʻe i hoʻolei ʻia a i ʻole nā hale brick-a-powder i kālai ʻia, i loaʻa kekahi mau hopena insulation leo. Eia nō naʻe, ma muli o ka haʻahaʻa haʻahaʻa o ka leo o nā mea hoʻololi a me nā reactors a me ka lōʻihi o ka nalu o nā hawewe kani, ikaika loa ko lākou leo diffraction a me ka hiki ke hoʻouna ʻana, no laila ʻilihune pinepine ka insulation leo a me nā hopena hoʻohaʻahaʻa leo. Eia kekahi, ʻaʻole i hoʻolālā kūikawā ʻia nā pale kani o kēia manawa a me nā uhi hoʻokaʻawale kani o nā substations UHV no nā ʻano leo haʻahaʻa haʻahaʻa o ka substation, a ʻaʻole kūpono ka hopena hoʻohaʻahaʻa leo. Inā hiki iā mākou ke noʻonoʻo i nā hiʻohiʻona o nā substations UHV i hoʻomalu ʻia e ka walaʻau waena a me ka haʻahaʻa haʻahaʻa, a hoʻopaʻa i kahi ʻano hoʻopaʻa leo i hui pū ʻia me nā hana hoʻoheheʻe a me ke kani ʻana, ua manaʻo ʻia e hiki ke hoʻemi pono i ka leo waena a me ka haʻahaʻa haʻahaʻa a loaʻa i ka lapalapa ahi a me nā waiwai insulation. He mea koʻikoʻi kēia no ka hoʻomaikaʻi ʻana i ka maikaʻi o ke kaiapuni acoustic o nā substation.
Ma muli o kēia, ua kālailai kēia ʻatikala i nā ʻano o ka ikaika o ke kumu walaʻau o nā lako nui o ka substation UHV. Ma muli o nā koi no nā mea i loko o ke kahua e loaʻa i ka flame retardant, insulating a me nā waiwai ʻē aʻe, ua koho mākou e hana i nā hoʻokolohua hoʻopili leo hoʻokahi a hui pū ʻia ma nā laʻana melamine foam , nā laʻana papa micro-perforated, a me nā laʻana sima foamed, a ua hāpai i kahi ʻano hoʻopili leo hui kūpono no ka hōʻemi ʻana i ka walaʻau ma nā substation UHV. He mea nui kēia i ke alakaʻi pono no nā noi ʻenekinia pono.
Ⅰ. Ka nānā ʻana i ke ana ʻana o ka leo o nā mea hana nui o ka substation UHV
I ka wā o ka hana ʻana o nā substations UHV, ʻo nā kumu leo nui e pili ana i nā transformers kiʻekiʻe-voltage, shunt reactors, substation structures, a me nā mea ʻē aʻe. ʻO ka walaʻau ʻo Corona ka mea maʻamau a hiki i ke alapine kiʻekiʻe, atenuates wikiwiki i ka wā hoʻolaha, a he liʻiliʻi ka hopena. ʻO ka walaʻau haʻahaʻa haʻahaʻa i hana ʻia e ke ʻano o loko o nā mea hoʻololi a me nā reactors shunt atenuate lohi a loaʻa i kahi ākea ākea. No laila, ʻo ka mana o ka walaʻau o nā transformers a me nā reactors shunt ke kumu o ka hoʻokele walaʻau i nā substations.
- ʻIke ana i ka leo o ka mea hoʻololi nui
Ana 'ia ka pae mana leo o ka transformer me ke ano o ka ikaika o ke kani. ʻO ka lawe ʻana i ka mea hoʻololi hoʻokahi-phase ma ke ʻano he ana, ʻo ka mamao ma waena o ka laina kuhi i kuhikuhi ʻia a me ka ʻili hoʻokuʻu kuhikuhi he 2m, a ua hoʻonohonoho ʻia ʻelua mau laina contour i kuhikuhi ʻia, aia ma ka mokulele ākea o 2m a me 4m pakahi. Aia nā helu ana a pau ma ka laina contour i kuhikuhi ʻia, a ʻo 1m ka mamao ma waena o nā kiko ana pili. Hoʻohana ʻia nā ʻōkuhi ikaika leo e ana i kēlā me kēia kiko.
I ka 2000MW ka haawe mana o ka hui transformer hookahi, o ka hopena ana o ka ikaika o ka leo o ka mahele C o ka mea transformer ma ka Hui I. O ka pae mana leo A-kaumaha ka nui loa ma ka 1/3 octave alapine me na alapine waena o 100, 125, 160 a me 200 Hz o ka UHV transformer. Wahi a ka mīkini hana hoʻoheheʻe noise, ʻo ka walaʻau i loko o kēia alapine e hele mai ana mai ka leo electromagnetic o ke kino transformer. No laila, i ka hōʻemi ʻana i ka leo transformer, pono e hāʻawi ʻia i ka mea nui i ka hōʻemi ʻana i ka band frequency 100 ~ 200Hz. I ka wā o ke ana ʻana, ua kūpaʻa ka haʻawe mana o kahi pūʻulu o nā mea hoʻololi i 2000MW, a ʻo ka huina A-kaumaha kani o nā mea hoʻololi he 102.7dB(A).
- ʻO ke ana a me ka nānā ʻana i ka leo reactor kiʻekiʻe
ʻO ke ʻano o ke ana ʻana o ka pae mana leo reactor e like me ka transformer. I ka lawe ʻana i ka māhele B o ka reactor like i loko o ka substation UHV ma ke ʻano he mea ana, ʻo ka mamao ma waena o ka laina kuhikuhi i kuhikuhi ʻia a me ka ʻili hoʻokuʻu kuhikuhi he 1m, a ua hoʻonohonoho ʻia nā laina ʻelua i kuhikuhi ʻia me ke kiʻekiʻe o 1.5m a me 3m. ʻO 1m ka mamao ākea ma waena o nā kiko ana pili.
Hōʻike ka hōʻike ʻana ma ka hui 1/3 octave holoʻokoʻa, ʻoi aku ka nui o nā ʻāpana haʻahaʻa haʻahaʻa, ʻo ia ka mea nui loa o ka mana kani ma ke alapine 100Hz, a hiki i 96.4dB(A), ʻo ia ka 11.5dB(A) ʻoi aku ka kiʻekiʻe ma mua o ka pae mana kani o 200Hz. ʻO ka mana kani i ka 1/3 octave band kahi i loaʻa ai ka 100Hz he 91.2% o ka mana anti-sound kiʻekiʻe. No laila, hiki ke hoʻoholo ʻia ʻo ke ʻano keʻakeʻa i ka puʻu ʻana o ke kahua kani reactor ma muli o ka nalu kani 100Hz.
Ⅱ. Nā mea porous a me ka micro-perforated plate hoʻokolohua
I ka hoʻolālā ʻenekinia kaohi walaʻau, he mea paʻakikī pinepine ka hoʻokō ʻana i ka hopena hōʻemi walaʻau i manaʻo ʻia ma ka hoʻohana ʻana i hoʻokahi mea no ka omo ʻana i ke kani a me ka mālama ʻana i ka insulation. No laila, hoʻohana pinepine ʻia nā ʻano hui mea omo leo e hōʻemi i ka walaʻau. ʻOi loa i nā wahi o loko me nā leo nui a me nā manawa reverberation lōʻihi, he mea maʻamau ka hoʻohana ʻana. No ke aʻo ʻana i ka ʻano omo leo kūpono no ka kaohi walaʻau ma nā kikowaena UHV, pono mua mākou e noʻonoʻo i nā waiwai insulation a me nā mea pale ahi, a ʻo ka lua, pono mākou e hoʻohui i nā ana kikoʻī e hoʻoholo ai i ka ʻano omo leo.
I kēia manawa, hoʻohana ʻia nā papa perforated a me nā mea hoʻoheheʻe leo i loko o nā pā hoʻoheheʻe kani o nā substations UHV e hōʻemi i ka walaʻau, akā ʻaʻole maikaʻi ka hopena i ka band haʻahaʻa haʻahaʻa. Pono kēia e hoʻohui i nā ʻano kumu kani o nā mea hana nui o ka substation UHV. Ma hope o ka hoʻoholo ʻana i nā ʻano hoʻohaʻahaʻa leo kikoʻī, pehea e koho ai i nā mea kani porous a pehea e hoʻoholo ai i ke ʻano o ke kani kani e lilo i kī no ka hoʻomalu leo i ka substation. Ma lalo iho nei, koho ʻia ʻekolu mau laʻana o ka pā micro-perforated, melamine foam, a me ka ʻūhā ʻūhā e hui pū kekahi me kekahi e hana i nā hoʻokolohua.
- ʻO ka hui pū ʻana o ka pā micro-perforated pālua
Micro-perforated pā hoʻokolohua laʻana, i ka helu perforation o micro-perforated pā hāpana 1 mea 1.5%, ka pā mānoanoa he 1mm, a me ka pore anawaena he 0.7mm; ʻO ka helu perforation o ka micro-perforated plate sample 2 he 1.1%, ka mānoanoa pā he 1mm, a he 0.7mm ka pore, Micro-perforated plate sample 3, he 0.7% ka perforation rate, he 1mm ka mānoanoa o ka pā, a he 0.7mm ka puka.
Ua hana ʻia ʻelua mau hoʻokolohua ma luna o ka hui pālua micro-perforated pā pālua. ʻO ka hoʻāʻo 1 he hui pū ʻana o ka micro-perforated plate sample 2 a me ka micro-perforated plate sample 1, a ʻo ka hoʻokolohua 2 he hui pū ʻana o ka micro-perforated plate sample 1 a me ka micro-perforated plate sample 3. ʻElua pūʻulu hoʻokolohua ma ka papalua micro-perforated plate hui pū ʻana e hōʻike ana i ke kani absorption coefficient ma 100 Hz a puni ka nui o ke kani. ʻike ʻia ma 0.7Hz a 500Hz ma nā pūʻulu hoʻokolohua ʻelua. Ma ke alapine alapine ma luna o 600Hz, e emi mālie ke kani hoʻoheheʻe ʻana.
- ʻO ka hui pū ʻana o ka sima pua a me ka papa micro-perforated
ʻO ka mea mua, ua hoʻohana ʻia kahi hale hoʻoheheʻe kani e hui pū ana i ka sima hū a me kahi pā micro-perforated one-layer. Ua hoʻokō ʻia ʻelua mau hoʻokolohua me nā ʻokoʻa like ʻole ma ka hui ʻana i ka sima foamed a me kahi pā micro-perforated pākahi. I loko o nā hoʻokolohua ʻelua, ua kau ʻia ka sima huʻi i mua o ka pā micro-perforated.
Aneane ʻaʻohe hoʻololi nui ma waena o ka ʻikepili o ka hoʻokolohua 3 a me ka hoʻāʻo 4. ʻAʻole e loli ka hoʻokō kani ʻana o ka hale hui pū me nā hoʻololi liʻiliʻi o ka mānoanoa o ka sima hū a me ka mamao ma waena o ka sima a me ka pā micro-perforated. Ma 100Hz, ʻo ka helu hoʻoheheʻe leo ma kahi o 0.4, ma 250Hz, hiki i ka helu hoʻoheheʻe kani i kona kiʻekiʻe, a ma kahi o 900Hz, hiki ke hōʻea i ka waiwai kiʻekiʻe o ka coefficient absorption kani hou.
- ʻO ka huʻa melamine a me ka hui puana micro-perforated
Ua mālama ʻia ʻelua mau hoʻokolohua ma ka hui ʻana o ka melamine foam a me nā papa micro-perforated one-layer. Ma nā pūʻulu hoʻokolohua ʻelua, ua waiho ʻia ka melamine foam ma mua o nā papa micro-perforated. ʻO nā helu hoʻoheheʻe kani ma 100Hz ma nā pūʻulu ʻelua o nā hoʻokolohua ma kahi o 0.7, a ma waena o 100Hz a me 500Hz, ʻoi aku ka nui o nā coefficients absorption ma luna o 0.7. Ma kahi o 500Hz, e emi ana ka helu hoʻoheheʻe kani, akā i ka piʻi ʻana o ke alapine, e piʻi mālie ka helu hoʻoheheʻe kani. Loaʻa i kēia hui ʻana kahi hopena hoʻoheheʻe leo maikaʻi loa ma nā pūʻulu haʻahaʻa a me nā kaha kiʻekiʻe.
Ⅲ. ʻIkepili o nā hopena hoʻokolohua
Wahi a nā hiʻohiʻona o ke kumu walaʻau o nā mea nui o ka substation UHV i kaulana i ka band frequency haʻahaʻa, ua hoʻokō ʻia nā hoʻokolohua ma ke koho ʻana i kahi ʻano huila micro-perforated plate composite, kahi sima pua me ka micro-perforated plate composite structure, a me ka melamine foam me ka micro-perforated plate composite structure. Hōʻike nā hopena hoʻāʻo e hiki ke hoʻokō ʻia nā ʻano hui like ʻekolu i kahi hopena hoʻoheheʻe kani i ka band haʻahaʻa haʻahaʻa, akā pehea e hoʻopili ai i ka ʻenekinia maoli e pono ai nā ana hoʻohaʻahaʻa leo.
- ʻO ka hui pū ʻana o ka pā micro-perforated
Hiki i nā papa micro-perforated papa ʻelua ke hoʻomāhuahua i ke kani ʻana o ka leo o nā papa micro-perforated hoʻokahi. Ma muli o ke kumumanaʻo o ka hoʻohālikelike impedance, ʻo ke kumu o ka hoʻolālā hui ʻana ʻo ia ka nui o ka perforation o ka papa mua o nā papa micro-perforated ma mua o ka helu perforation o ka papa hope o nā papa. Hiki i ka hoʻolālā hui pū ʻana o nā panela micro-perforated ke hoʻokō i kahi helu hoʻoheheʻe kani o ka ʻoi aku ma mua o 0.7 i ke alapine alapine o 150-800Hz i ka wā ʻo 20cm ka mānoanoa o ka hale i hui pū ʻia. I ka 30cm ka mānoanoa o ka hale i hui pū ʻia, hiki iā ia ke hoʻokō i ka coefficient absorption leo ʻoi aku ma mua o 0.7 i ke alapine o 100-800Hz.
- ʻO ka sima hū me ka micro-perforated plate composite
ʻO ka hoʻohui ʻana i ka sima hū i mua o ka papa micro-perforated hiki ke hoʻonui i ke kani ʻana o ke kani o ka micro-perforated board, a hiki i ka ʻūhā ʻana ke pāʻani i kahi hana pale ahi.
Hiki ke hoʻokō ʻia kahi helu hoʻoheheʻe leo o ka ʻoi aku ma mua o 0.7 i ke alapine alapine o 150-1000Hz i ka 20cm ka mānoanoa o ka hale i hui pū ʻia. Hiki ke hoʻokō ʻia kahi helu hoʻoheheʻe leo o ka ʻoi aku ma mua o 0.7 i ke alapine o 150-1400Hz i ka mānoanoa o ka hale hui holoʻokoʻa he 20cm. I ka 30cm ka mānoanoa o ka hale i hui pū ʻia, hiki iā ia ke hoʻokō i ka coefficient absorption leo ʻoi aku ma mua o 0.7 i ke alapine o 100-1400Hz. I ka manawa like, ʻoi aku ka liʻiliʻi o ka puʻupuʻu nui o ka sima foamed, ʻoi aku ka nui o ka porosity, a ʻoi aku ka maikaʻi o ka hopena haʻahaʻa haʻahaʻa.
- No ka hui hui o mea hoʻopaʻa leo a me ka micro-perforated plate, hiki i ka mea kani kani ke hoʻonui i ke kani kani o ka micro-perforated plate a hoʻonui i ka mamao ma waena o ke kani a me ka micro-perforated plate. Piʻi ka helu hoʻoheheʻe kani o nā alapine waena a me nā alapine kiʻekiʻe, a neʻe ka piko hoʻoheheʻe kani i nā alapine haʻahaʻa. Ma ka hoʻonui ʻana i ka mānoanoa o ka mea hoʻoheheʻe kani, e emi iki ka helu haʻahaʻa haʻahaʻa haʻahaʻa, a piʻi ka helu waena a me ke kiʻekiʻe. ʻO ka hoʻonui ʻana i ka mānoanoa o ka papa lua ma hope o ka pā micro-perforated hiki ke hoʻonui i ke kani haʻahaʻa haʻahaʻa. ʻOi aku ka maikaʻi o nā mea hoʻoheheʻe kani a me nā panela micro-perforated pālua ʻelua i ka hoʻoheheʻe ʻana i ke kani a ʻoi aku ka nui o nā kaula kani hoʻopaʻa leo ma mua o nā mea hoʻoheheʻe kani a me nā paneli micro-perforated pākahi.
Hiki ke ʻike ʻia mai ka nānā ʻana o ka ʻikepili hoʻokolohua e hiki ai i ka melamine foam a me kahi pā hoʻokahi micro-perforated pā hoʻokahi ke hoʻokō i ka coefficient absorption leo ʻoi aku ma mua o 0.6 i ke alapine o 200-1600Hz i ka wā ʻo 20cm ka mānoanoa o ka hale i hui pū ʻia. I ka 30cm ka mānoanoa o ka hale hoʻohui holoʻokoʻa, hiki ke hoʻokō ʻia kahi coefficient absorption leo ʻoi aku ma mua o 0.6 ma ke alapine o 100-1600Hz. Hiki i ka melamine foam a me ka papalua micro-perforated panels ke hoʻokō i ka coefficient absorption leo ʻoi aku ma mua o 0.7 i ke alapine o 200-1600Hz i ka wā ʻo 20cm ka mānoanoa o ka hale i hui pū ʻia. I ka 30cm ka mānoanoa o ka hale hoʻohui holoʻokoʻa, hiki ke hoʻokō ʻia kahi coefficient absorption leo ʻoi aku ma mua o 0.7 ma ke alapine o 100-1600Hz.
Ma muli o ka nānā ʻana i nā hiʻohiʻona o ka leo o ka UHV main transformer a me ke kiʻekiʻe-voltage shunt reactor, ka nui o ka ikehu leo o ka UHV main transformer ka mea nui ma 100-200Hz, a ʻo ka ikehu leo o ka reactor kiʻekiʻe-voltage ka mea nui ma 100Hz. No ke kohoʻana i kahi mea hoʻohaʻahaʻa leo, pono e hoʻohui i nā alapine o nā kumu leo nuiʻelua. I ka manawa like, pono e hui pū ʻia nā ʻano hoʻohaʻahaʻa walaʻau me ka hoʻolālā o ka substation e kāohi i ka walaʻau me ka hui maikaʻi o nā mea a me nā ʻano.
No ka ʻike hou aku e pili ana iā SINOYQX Melamine Foam, e ʻoluʻolu e hoʻokaʻaʻike mai iā mākou ma [email protected] a i ʻole e leka uila mai iā mākou: +86-28-8411-1861.
Hoʻopuka hou ʻia kekahi mau kiʻi a me nā kikokikona mai ka Pūnaewele, a no ka mea kākau kumu ke kuleana kope. Inā loaʻa kekahi hewa, e ʻoluʻolu e kelepona mai iā mākou e holoi.