Kev xaiv cov hmoov lead- tawm txoj kab uas hla thiab qhov ntsuas lub zog ntawm cov cua sov

Lub zog ntawm lub tshuab hluav taws xob cua sov feem ntau yog txiav txim siab los ntawm qhov kub thiab txias lub sij hawm ntawm lub cua sov system. Yog li ntawd, thaum txiav txim siab lub zog thiab qhov hluav taws xob, cov khoom siv thiab txoj kab uas hla ntawm cov hlau lead - hauv pas nrig yuav tsum ua tau raws li cov qauv tsim. Hauv qab no yog cov npe ntawm cov ntaub ntawv cuam tshuam txog cov khoom siv rau cov hlau lead- hauv pas nrig.

Txij li thaum cov cua kub feem ntau kaw nrog RTV silicone tom qab ua tiav, nrog rau qhov kub thiab txias ntawm kwv yees li 250 degree, qhov siab tshaj plaws kev khiav hauj lwm kub ntawm cov hlau lead xaiv - nyob rau hauv pas nrig yuav tsum tsawg dua los yog sib npaug rau 250℃(qhov siab tshaj plaws kub tsis kam ntawm RTV silicone). Yuav ua li cas thiaj li yuav tsum tau lav?

Cia peb piav qhia qhov no nrog ib qho piv txwv ntawm daim ntawv thov: Xav txog 220V 4000W hluav taws xob cua sov lub caij nrog cov hlau tsis muaj hlau lead- nyob rau hauv pas nrig muaj ib txoj kab uas hla ntawm Φ2.6 × 75mm. Qhov kev xaiv loj no puas raug thiab tsim nyog? Peb tsuas tuaj yeem txiav txim siab nws qhov raug thiab tsim nyog los ntawm kev suav.

Kev daws: Siv Φ2.6 lead pas nrig, nrog qhov ntev ntawm 75 hli, uas sib npaug 0.075 meters.

① Tam sim no ntws los ntawm cov pas nrig yog:

Kuv=P/U=4000/220 ≈ 18.18 Amperes

② Xam cov nqi tsis kam rau qhov ntev ntawm 75 hli thiab sab nraud ntawm Φ2.6 hli:

vim R=ρ.L/S=0.7 × 0.075/3.142 × 1.32 ≈ 0.01 Ohms

③ Lub hwj chim P generated thaum 18.18 Amperes ntws los ntawm 75 mm lead pas nrig yog:

P=I²R=18.18² × 0.01 ≈ 3.31 W (piv txwv li, lub zog tsim los ntawm 75 mm lead pas nrig yog 3.31 W)

④ Ntawm txoj kab uas hla ntawm 75 hli, qhov chaw thauj khoom sib thooj rau Φ2.6 lead- hauv pas nrig yog q_rod.

luas=3.142 × 0.26 × 7.5 ≈ 0.54 W/cm²

⑤ Thaum tam sim no ntawm 18.18 amps ntws los ntawm Φ2.6 stainless hlau lead- hauv pas nrig, tag nrho lub zog tsim tawm yog 3.13 W, thiab qhov sib thooj ntawm tus pas nrig yog 0.54 W / cm². Raws li kev sib raug zoo ntawm qhov chaw thauj khoom thiab qhov ntsuas kub ntawm lub raj nto, qhov kub thiab txias ntawm cov hlau tsis muaj hlau lead no - nyob rau hauv pas nrig tuaj yeem suav tau kwv yees li 200-220℃.

Xaus: Thaum lub cheeb ntawm cov hlau lead- nyob rau hauv pas nrig ntawm lub cua sov lub caij no yog Φ2.6, thiab tam sim no ntws los ntawm nws yog 18.18 amps, qhov kub ntawm cov hlau lead- nyob rau hauv pas nrig yog kwv yees li 200-220 degree, uas yog qis dua qhov kub thiab txias tsis kam ntawm silicone roj hmab (250 degree). Yog tias qhov kub siab tshaj qhov ntsuas kub tsis kam ntawm silicone roj hmab (250 degree), cov roj hmab silicone yog qhov ua rau qeeb qeeb thiab tawg ntawm cov hlau lead- hauv pas nrig kub, ua rau txo qis hauv rwb thaiv tsev thiab hluav taws xob ua haujlwm. Tshaj li qhov kub thiab txias tsis kam kuj tseem tuaj yeem ua rau carbonization ntawm silicone, ua rau txo qis ntawm cov rwb thaiv tsev ntawm cov cua sov thiab txawm tias tawg ntawm cov pas nrig thiab cov txheej sab nrauv vim silicone carbonization.

Txhawm rau daws qhov teeb meem saum toj no, yog tias qhov kub siab tshaj 250 degree, kev txhim kho hauv qab no tuaj yeem ua tau:

① Nyob ntawm sab nraud ntawm lub tshuab cua sov, yog tias Φ Ntau dua lossis sib npaug li 10 hli, lub taub sab nraud lossis qhov ntev ntawm cov pas nrig tuaj yeem tsim nyog. Qhov kev hloov kho no txo ​​qhov tsis kam ntawm ib chav tsev ntev thiab txo cov load ntawm cov hlau lead pas nrig. Txawm hais tias tam sim no ntawm 18.18 amps tseem ntws los ntawm cov pas hlau lead, qhov kub ntawm qhov chaw yuav poob mus rau qhov kub uas cov silicone tuaj yeem tiv taus lossis qis dua.

② Yog tias txoj kab uas hla ntawm lub raj yog Φ Tsawg dua lossis sib npaug li 10 hli, thiab qhov tam sim no tseem yog 18.18 amps, cov khoom siv lead ua tuaj yeem ua kom ntev los yog hloov tau zoo, xws li siv lub pas nrig npib tsib xee. Nws yuav tsum raug sau tseg tias txawm hais tias qhov kev tiv thaiv ntawm cov hlau lead rods qis dua cov hlau tsis muaj steel, nws tsis pom zoo kom siv lawv vim tias cov hlau lead rods nquag oxidation, muaj zog tsawg, thiab kev tiv thaiv siab, uas tsis tsim nyog.