ʻO Silicon Nitride Bonded Silicon Carbide Thermocouple Protection Tube: ʻO ka pale hope loa no ke ana wela o ka ʻoihana.

ʻO Thermocouples ka iwi kuamoʻo o ka nānā ʻana i ka wela ma nā kaʻina hana ʻenehana he nui - mai ka hoʻoheheʻe metala a hiki i ka synthesis kemika. Eia nō naʻe, hilinaʻi ʻia kā lākou hana a me ke ola ʻana i hoʻokahi mea koʻikoʻi: ka pahu pale. I loko o nā wahi ʻoihana koʻikoʻi, ʻaʻole hiki i nā paipu pale thermocouple kuʻuna (i hana ʻia me ka metala, alumina, a i ʻole ka silicon carbide maʻemaʻe) ke kū ʻole i ka wela loa, ka media corrosive, a i ʻole nā ​​ʻāpana abrasive. Ke alakaʻi nei kēia i ka hoʻololi pinepine ʻana i ka thermocouple, ka ʻikepili wela kūpono ʻole, a me ke kumu kūʻai o ka manawa haʻahaʻa.​

Inā luhi ʻoe i ka hoʻololi ʻana i ka hilinaʻi thermocouple,Silikino Nitride Hoʻopaʻa ʻia ʻo Silicon Carbide (NSiC) Thermocouple Protection Tubesʻo ia ka hopena hoʻololi pāʻani āu e pono ai. Hana ʻia no ka pale ʻana i nā thermocouples i nā kūlana koʻikoʻi loa, hōʻoia nā paipu NSiC i ka ʻike ʻana i ka wela kūpono a me ka hoʻonui ʻana i ke ola lawelawe o kāu mau mea ana koʻikoʻi.

No ke aha i kū ai ʻo Silicon Nitride Bonded Silicon Carbide no ka palekana Thermocouple

Pono nā paipu pale Thermocouple i kahi koena kūʻokoʻa o nā waiwai: pale ʻana i ka wela, pale ʻana i ka corrosion, ikaika mechanical, a me ka conductivity thermal. ʻOi aku ka NSiC ma kēia mau wahi āpau, ʻoi aku ka maikaʻi o nā mea kuʻuna ma kēlā me kēia metric kī:

1. Kūleʻa wela loa no ka ʻike ʻole ʻana

Hoʻohana ʻia nā Thermocouples i nā ʻoihana e like me ka hana aniani a i ʻole ka hoʻolei ʻana i ka metala i nā mahana ma mua o 1,500°C. ʻO nā paipu pale thermocouple NSiC e mālama i kēia me ka maʻalahi - kaena ʻana i kahi mahana hana mau a hiki i 1,600 ° C (2,912 ° F) a me ke kū'ē pōkole i 1,700 ° C (3,092 ° F). ʻAʻole like me nā paipu metala e hoʻoheheʻe ʻia a hoʻoheheʻe ʻia, a i ʻole nā ​​pahu alumina e haki ana ma lalo o ka haʻalulu wela, mālama ʻo NSiC i ka kūpaʻa o ka hoʻolālā ʻana i ka wā o ka piʻi ʻana o ka wela. ʻO ia ke ʻano o ka mālama ʻia ʻana o kāu thermocouple, a paʻa mau kāu ʻikepili wela—no ka nui o ka wela.​

2. ʻOi aku ka pale ʻana i ka corrosion e pale aku i nā mea hoʻopaʻapaʻa ikaika

Hōʻike pinepine nā kaʻina hana ʻoihana i nā thermocouples i nā metala hoʻoheheʻe (aluminum, zinc, copper), acidic/alkaline solutions, a i ʻole nā ​​kinoea corrosive (sulfur dioxide, chlorine). Hoʻokumu ka NSiC's dense, nitride-bonded structure i kahi pale hiki ʻole ke kū i kēia mau mea. ʻAʻole like me nā paipu carbide silika maʻemaʻe, hiki ke hoʻokaʻawale ʻia i loko o nā kaiapuni wela kiʻekiʻe, hoʻomaikaʻi ka haku mele ʻana o NSiC i ka pale ʻana i ka oxidation - e hōʻoiaʻiʻo ana i ka pale ʻana o kāu thermocouple mai ka corrosion no nā makahiki. He mea koʻikoʻi kēia no nā noi e like me ke kaʻina hana kemika, ka ʻōpala ʻōpala, a me ka synthesis material battery

3. Ka ikaika Mechanical Kūikawā e pale aku i ka lole a me ka hopena

ʻO nā Thermocouples i loko o nā mea kanu sima, nā mana mana, a i ʻole nā ​​​​mea hana hoʻoheheʻe mineral e kū i nā hoʻoweliweli mau: ka lepo abrasive, nā ʻāpana lele, a me ka hopena mechanical. Hoʻokumu ʻia nā paipu pale thermocouple NSiC e pale aku i kēia mau pilikia, me ka ikaika flexural ʻoi aku ma mua o 300 MPa a me kahi paʻakikī Vickers (HV10) o ≥ 1,800. ʻO kēia ka mea i ʻoi aku ka lōʻihi o 3-5 mau manawa ma mua o nā paipu kuʻuna, e hōʻemi ana i ka pono o ka hoʻololi pinepine ʻana. No kāu mau hana, ʻo ia ka unuhi ʻana i ka manawa hoʻohaʻahaʻa, nā kumukūʻai mālama haʻahaʻa, a me ka hana thermocouple hilinaʻi.​

4. ʻO ka hana wela wela maikaʻi loa no ka heluhelu wikiwiki a pololei

Aia ka waiwai o ka thermocouple i kona hiki ke pane koke i nā loli wela. ʻOi aku ka kiʻekiʻe o ko NSiC's thermal conductivity (60–80 W/(m·K)) ma mua o ka alumina a i ʻole nā ​​paipu metala, hiki ke hoʻololi wikiwiki i ka wela mai ke kaʻina hana i ka hui thermocouple. Mālama kēia i kāu thermocouple e hāʻawi i ka manawa maoli, ka ʻikepili pololei-koʻikoʻi no ka mālama ʻana i ka mana kaʻina hana a me ka maikaʻi o ka huahana. Eia kekahi, ʻo ka helu hoʻonui wela haʻahaʻa o NSiC (3.5–4.5 × 10⁻⁶/°C) e hōʻemi i ke koʻikoʻi wela, e pale ana i nā māwae e hiki ke hoʻololi i ka pololei o ke ana.​

5. Ka lōʻihi o ke kumu kūʻai no nā kumu kūʻai ʻona haʻahaʻa

ʻOiai ʻoi aku ka kiʻekiʻe o nā paipu pale thermocouple NSiC ma mua o nā koho kuʻuna, ʻo ko lākou ola lawelawe lōʻihi (2-5 mau makahiki i nā kūlana koʻikoʻi) a me nā pono mālama liʻiliʻi e hāʻawi i nā mālama mālama lōʻihi. Ma ka hōʻemi ʻana i ke alapine hoʻololi thermocouple a me ka hoʻopau ʻana o ka hana, hoʻohaʻahaʻa ʻo NSiC i kāu kumukūʻai a pau o ka ʻona (TCO) a hoʻonui i kāu hoʻihoʻi ʻana i ka hoʻopukapuka (ROI). No nā mea kanu ʻoihana e ʻimi nei e hoʻonui i ka pono, he koho naʻauao kēia e hiki mai ana