久久精品中文字幕无码绿巨人_亚洲国产精品VA在线观看麻豆_色欲aⅴ亚洲情无码AV_国产免费无码av片在线观看不卡

YHHR 電焊機電纜-YHHR型特軟電纜可(ke)采用電(dian)焊YHH型(xing)橡(xiang)套(tao)軟(ruan)件電(dian)纜(lan)和YHHR型(xing)特軟(ruan)焊接電(dian)纜(lan)。選(xuan)(xuan)用焊接電(dian)纜(lan)時應從溫升和電(dian)壓降兩(liang)方(fang)面來(lai)才考(kao)慮。對長度20米以下的(de)可(ke)忽略其壓降的(de)影響(xiang)，而(er)只按電(dian)流(liu)(liu)來(lai)選(xuan)(xuan)擇(ze)，電(dian)流(liu)(liu)密度可(ke)取(qu)每平方(fang)4—10A。下列出各種長度下不同電(dian)流(liu)(liu)時，焊接電(dian)纜(lan)的(de)截面積的(de)選(xuan)(xuan)用。

YHHR 電焊機電纜-YHHR型特軟電纜利用(yong)焊(han)(han)(han)(han)接(jie)(jie)(jie)電(dian)(dian)纜(lan)(lan)(lan)將焊(han)(han)(han)(han)鉗(qian)和接(jie)(jie)(jie)地(di)夾鉗(qian)接(jie)(jie)(jie)到(dao)電(dian)(dian)源上。焊(han)(han)(han)(han)接(jie)(jie)(jie)電(dian)(dian)纜(lan)(lan)(lan)是焊(han)(han)(han)(han)接(jie)(jie)(jie)回路的(de)一部分(fen)，除要求應具(ju)有足夠的(de)導(dao)電(dian)(dian)截面以免(mian)過熱而引起導(dao)線絕緣破壞外，還必須耐磨和耐擦傷(shang)，應柔(rou)軟(ruan)易彎(wan)曲，具(ju)有大(da)的(de)撓(nao)度，以便焊(han)(han)(han)(han)工容易操(cao)作(zuo)，減輕(qing)勞(lao)動強度。焊(han)(han)(han)(han)接(jie)(jie)(jie)電(dian)(dian)纜(lan)(lan)(lan)應采用(yong)多股(gu)細銅線電(dian)(dian)纜(lan)(lan)(lan)，一般可選用(yong)電(dian)(dian)焊(han)(han)(han)(han)機(ji)用(yong)YHH　型(xing)橡(xiang)套電(dian)(dian)纜(lan)(lan)(lan)或　YHHR　型(xing)橡(xiang)套電(dian)(dian)纜(lan)(lan)(lan)。焊(han)(han)(han)(han)接(jie)(jie)(jie)電(dian)(dian)纜(lan)(lan)(lan)的(de)截面積可根(gen)據焊(han)(han)(han)(han)機(ji)額定焊(han)(han)(han)(han)接(jie)(jie)(jie)電(dian)(dian)流進(jin)行選擇，焊(han)(han)(han)(han)接(jie)(jie)(jie)電(dian)(dian)纜(lan)(lan)(lan)截面與電(dian)(dian)流、導(dao)線長(chang)度的(de)關系.

1.電焊機(ji)一次(ci)工作(zuo)電流(liu)的(de)計算　　　　　　先(xian)按上節所述方法求(qiu)出弧焊機(ji)所需的(de)電源容量，再按下列公式(shi)求(qiu)得電焊機(ji)一次(ci)工作(zuo)電流(liu)。

　　　　(1)單相供(gong)電回路時：　　　　式中　　Iux——導線(電纜)允許電流，A。　　　　　　(2)按電壓損失(shi)校驗。要(yao)求電壓損失(shi)不(bu)超過10％，盡量控(kong)制在(zai)5%以(yi)內。

　　　　對單相回(hui)路：　　　　式中　△U％——電(dian)焊機(ji)一次回(hui)路電(dian)壓(ya)損失百分(fen)數；　　　　R、X——電(dian)線(電(dian)纜)的電(dian)阻和電(dian)抗，Ω；　　　　　　cosφ——功率因數，如無銘牌，一般(ban)可(ke)取0.5。

　　　2　　　　　一(yi)(yi)(yi)次電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)一(yi)(yi)(yi)般(ban)采用(yong)500V單芯(xin)或多(duo)芯(xin)橡(xiang)皮(pi)軟(ruan)線(xian)(xian)，如(ru)YCW型(xing)、BXR型(xing)。如(ru)用(yong)三芯(xin)或敷設在(zai)管道(dao)內(nei)或長(chang)度(du)較大(da)(da)時，電(dian)(dian)(dian)(dian)流(liu)密(mi)度(du)可取3～6A／mm2。而一(yi)(yi)(yi)般(ban)長(chang)度(du)的(de)(de)(de)單芯(xin)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)，電(dian)(dian)(dian)(dian)流(liu)密(mi)度(du)可取5～10A/ mm2　。　　　　　3.電(dian)(dian)(dian)(dian)焊(han)機(ji)二次電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)的(de)(de)(de)選(xuan)擇　　　　　　電(dian)(dian)(dian)(dian)焊(han)機(ji)二次回路(lu)的(de)(de)(de)電(dian)(dian)(dian)(dian)流(liu)都很(hen)大(da)(da)，電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)選(xuan)擇不當，易(yi)造(zao)成嚴重發熱，浪費電(dian)(dian)(dian)(dian)能(neng)。電(dian)(dian)(dian)(dian)焊(han)機(ji)二次導(dao)(dao)線(xian)(xian)可用(yong)YH型(xing)電(dian)(dian)(dian)(dian)焊(han)機(ji)用(yong)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)及(ji)YHHR型(xing)特軟(ruan)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)。導(dao)(dao)線(xian)(xian)長(chang)度(du)在(zai)20m以下時，電(dian)(dian)(dian)(dian)流(liu)密(mi)度(du)可取4～10A/ mm2　。一(yi)(yi)(yi)般(ban)要求(qiu)焊(han)接回路(lu)導(dao)(dao)線(xian)(xian)壓(ya)降應小(xiao)于4V，即約小(xiao)于電(dian)(dian)(dian)(dian)焊(han)機(ji)次級(ji)電(dian)(dian)(dian)(dian)弧電(dian)(dian)(dian)(dian)壓(ya)的(de)(de)(de)10％。當然(ran)為了節電(dian)(dian)(dian)(dian)，應盡可能(neng)使該(gai)壓(ya)降小(xiao)些。

YHHR 焊(han)接電(dian)(dian)(dian)(dian)纜(lan)-YHHR焊(han)機電(dian)(dian)(dian)(dian)纜(lan)-YHHR焊(han)把(ba)線(xian)-YHHR電(dian)(dian)(dian)(dian)焊(han)機電(dian)(dian)(dian)(dian)纜(lan)的(de)作用是傳(chuan)導焊(han)接電(dian)(dian)(dian)(dian)流，型號有YHH型電(dian)(dian)(dian)(dian)焊(han)橡膠套電(dian)(dian)(dian)(dian)纜(lan)和(he)YHHR型特軟電(dian)(dian)(dian)(dian)纜(lan)兩種，其截面和(he)長度(du)應(ying)根(gen)據(ju)使用焊(han)接電(dian)(dian)(dian)(dian)流的(de)大小進行選(xuan)用，見(jian)下表。