— 技術文章 —
NEWS CENTRES作者:中輝電器 來(lai)源:www.shenzhentuliao.cn 發布時間(jian):2019/4/28 10:00:22
電(dian)磁(ci)加(jia)熱(re)功(gong)率選配:、確認需要節能改造的設備原來的加(jia)熱(re)形(xing)式:
1、電爐絲(si)/石(shi)英:確認原來(lai)加熱區(qu)數量(liang)、每個溫區(qu)的(de)加熱功率(lv)(lv),就(jiu)近選擇(ze)相應功率(lv)(lv)型號(hao)的(de)電磁(ci)加熱產(chan)品(pin)進(jin)行搭(da)配即可,功率(lv)(lv)如果小(xiao)于(yu)2.5KW則律選擇(ze)2.5KW電磁(ci)加熱控制(zhi)板,搭(da)配產(chan)品(pin)的(de)數量(liang)與原來(lai)加熱區(qu)樣(yang)的(de)數量(liang)即可,該方法主要用于(yu)注塑機(ji)、吹膜(mo)機(ji)、拉絲(si)機(ji)、擠出機(ji)等功率(lv)(lv)較小(xiao)的(de)設備(bei)。
2、燒煤/柴油加(jia)熱:確認料筒(tong)直徑、需(xu)(xu)加(jia)熱區域的(de)長度、根據生產(chan)需(xu)(xu)要加(jia)熱的(de)溫(wen)度、具體的(de)產(chan)量要求,該方(fang)法需(xu)(xu)要定的(de)專(zhuan)業水平與經(jing)驗,客戶如若有需(xu)(xu)要可以(yi)提(ti)供以(yi)上數據由(you)電磁加(jia)熱器的(de)廠家進行(xing)鑒(jian)定。該方(fang)法主要用于水料造粒機、各種鍋爐等較(jiao)大功(gong)率的(de)設備。
二(er)、采(cai)暖器:電磁加(jia)熱采(cai)暖的(de)功率搭(da)配(pei)可參考日常空調的(de)搭(da)配(pei)方法(fa),即(ji)15平方/KW即(ji)可滿足采(cai)暖需求(qiu)。
三、將(jiang)放置(zhi)于水中加熱的(de)電(dian)熱棒改(gai)造成同等(deng)功率的(de)電(dian)磁感(gan)應加熱器(qi)其節電(dian)效果在10%以內,不太顯著,但可以大(da)大(da)提高其安全性及抗氧(yang)化能力(li)。
電磁(ci)加熱器多(duo)溫區控制就是有兩種:
種:是(shi)臺電磁加熱控制器控制多組線(xian)圈。
第二種:是臺設(she)備使(shi)用多(duo)個電磁加(jia)熱(re)控(kong)制(zhi)(zhi)器分(fen)別控(kong)制(zhi)(zhi)多(duo)個線圈(quan)。現在例(li)如注(zhu)塑(su)機,拉(la)絲機,吹(chui)膜機,擠(ji)出機等機械設(she)備,料管加(jia)熱(re)部分(fen)都需要(yao)(yao)幾個不同(tong)溫(wen)度才能滿足生產,這時候就要(yao)(yao)使(shi)用到(dao)電磁加(jia)熱(re)器多(duo)溫(wen)區來控(kong)制(zhi)(zhi)。
第三種:臺電磁(ci)加熱(re)控制器控制多組線(xian)圈比較少用,因(yin)為如果主機旦出現(xian)故障,整(zheng)個幾個溫度(du)都將無法加熱(re),影響(xiang)正規生產,而且(qie)維護起來(lai)也(ye)是比較麻煩的。
第四種:多(duo)個電磁加熱(re)控(kong)制(zhi)器(qi)分(fen)別控(kong)制(zhi)獨立(li)線圈,這樣不但(dan)便(bian)于管理,而且加熱(re)非(fei)常均勻,維(wei)護起來也是(shi)十分(fen)方便(bian)的(de)。
電(dian)(dian)(dian)(dian)磁(ci)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)器(qi)的(de)耗(hao)電(dian)(dian)(dian)(dian)情況是(shi)(shi)(shi)(shi)(shi)怎樣的(de)?工(gong)(gong)作(zuo)(zuo)原理是(shi)(shi)(shi)(shi)(shi)把220V或者380V交流(liu)電(dian)(dian)(dian)(dian),整(zheng)流(liu)后(hou)轉換成直(zhi)流(liu)電(dian)(dian)(dian)(dian),再(zai)(zai)將(jiang)直(zhi)流(liu)電(dian)(dian)(dian)(dian)進行濾(lv)波(bo),利用IGBT或者可(ke)控硅再(zai)(zai)將(jiang)直(zhi)流(liu)變成交流(liu),在感(gan)應(ying)(ying)線(xian)圈(quan)內(nei)產生高頻磁(ci)力線(xian),是(shi)(shi)(shi)(shi)(shi)感(gan)應(ying)(ying)線(xian)圈(quan)內(nei)導體工(gong)(gong)件(jian)表面產生渦流(liu)依靠自生內(nei)阻發熱(re)(re)(re)(re)(re)(re)。電(dian)(dian)(dian)(dian)磁(ci)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)器(qi)工(gong)(gong)作(zuo)(zuo)中當溫(wen)(wen)度(du)沒達到(dao)設(she)置(zhi)的(de)溫(wen)(wen)度(du)時(shi),電(dian)(dian)(dian)(dian)磁(ci)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)器(qi)就(jiu)(jiu)(jiu)(jiu)會直(zhi)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re),當達到(dao)了(le)預設(she)的(de)溫(wen)(wen)度(du)以后(hou)電(dian)(dian)(dian)(dian)磁(ci)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)器(qi)就(jiu)(jiu)(jiu)(jiu)停(ting)止加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)了(le),也就(jiu)(jiu)(jiu)(jiu)不(bu)(bu)再(zai)(zai)耗(hao)電(dian)(dian)(dian)(dian)了(le)。電(dian)(dian)(dian)(dian)磁(ci)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)器(qi)每個(ge)(ge)小(xiao)時(shi)的(de)耗(hao)電(dian)(dian)(dian)(dian)量(liang)多少與電(dian)(dian)(dian)(dian)磁(ci)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)器(qi)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)的(de)時(shi)間(jian)(jian)長(chang)(chang)短有關。電(dian)(dian)(dian)(dian)磁(ci)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)器(qi)剛工(gong)(gong)作(zuo)(zuo)是(shi)(shi)(shi)(shi)(shi)滿功(gong)率(lv)(lv),加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)溫(wen)(wen)度(du)了(le),就(jiu)(jiu)(jiu)(jiu)是(shi)(shi)(shi)(shi)(shi)工(gong)(gong)作(zuo)(zuo)會,停(ting)會。總體上(shang)(shang)來說(shuo),電(dian)(dian)(dian)(dian)磁(ci)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)器(qi)耗(hao)電(dian)(dian)(dian)(dian)量(liang)是(shi)(shi)(shi)(shi)(shi)很小(xiao)的(de),因為電(dian)(dian)(dian)(dian)磁(ci)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)器(qi)不(bu)(bu)是(shi)(shi)(shi)(shi)(shi)直(zhi)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)工(gong)(gong)作(zuo)(zuo)的(de),而是(shi)(shi)(shi)(shi)(shi)有間(jian)(jian)隙的(de)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)的(de),先是(shi)(shi)(shi)(shi)(shi)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re),然后(hou)達到(dao)溫(wen)(wen)度(du)后(hou)就(jiu)(jiu)(jiu)(jiu)停(ting)止加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re),之后(hou)就(jiu)(jiu)(jiu)(jiu)開始保(bao)溫(wen)(wen)工(gong)(gong)作(zuo)(zuo),直(zhi)到(dao)溫(wen)(wen)度(du)沒達到(dao)預設(she)的(de)溫(wen)(wen)度(du)后(hou)再(zai)(zai)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)下(xia),整(zheng)體上(shang)(shang)來講,電(dian)(dian)(dian)(dian)磁(ci)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)器(qi)并不(bu)(bu)是(shi)(shi)(shi)(shi)(shi)直(zhi)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)耗(hao)電(dian)(dian)(dian)(dian)的(de),所以也是(shi)(shi)(shi)(shi)(shi)比(bi)較省電(dian)(dian)(dian)(dian)的(de)個(ge)(ge)原因。同時(shi)因為料(liao)筒(tong)上(shang)(shang)還(huan)包有層(ceng)保(bao)溫(wen)(wen)棉,能起到(dao)保(bao)溫(wen)(wen)和(he)隔熱(re)(re)(re)(re)(re)(re)的(de)效果,那么熱(re)(re)(re)(re)(re)(re)量(liang)就(jiu)(jiu)(jiu)(jiu)不(bu)(bu)會損(sun)失掉了(le),那么能夠持(chi)續恒溫(wen)(wen)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)的(de)時(shi)間(jian)(jian)就(jiu)(jiu)(jiu)(jiu)越長(chang)(chang)了(le)。耗(hao)電(dian)(dian)(dian)(dian)量(liang)也就(jiu)(jiu)(jiu)(jiu)越小(xiao)了(le)。通過上(shang)(shang)述對電(dian)(dian)(dian)(dian)磁(ci)感(gan)應(ying)(ying)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)器(qi)改造(zao)時(shi)所配功(gong)率(lv)(lv)的(de)介紹(shao),我(wo)們可(ke)以了(le)解(jie)電(dian)(dian)(dian)(dian)磁(ci)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)器(qi)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)的(de)時(shi)間(jian)(jian)越短那么耗(hao)電(dian)(dian)(dian)(dian)量(liang)就(jiu)(jiu)(jiu)(jiu)越小(xiao),反之電(dian)(dian)(dian)(dian)磁(ci)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)器(qi)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)(re)的(de)時(shi)間(jian)(jian)越長(chang)(chang),耗(hao)電(dian)(dian)(dian)(dian)量(liang)就(jiu)(jiu)(jiu)(jiu)越大(da)。
如何選(xuan)擇合適功率的電磁感(gan)應加(jia)熱器?
1、被加(jia)(jia)熱的(de)工件形狀和(he)尺(chi)寸(cun):工件大、棒料(liao)、實材(cai),應(ying)選(xuan)用(yong)相對(dui)功(gong)率(lv)大,頻(pin)率(lv)低的(de)感應(ying)加(jia)(jia)熱設備;工件小(xiao)、管材(cai)、板材(cai)、齒(chi)輪(lun)等(deng),則選(xuan)用(yong)相對(dui)功(gong)率(lv)小(xiao),頻(pin)率(lv)高(gao)的(de)電磁感應(ying)加(jia)(jia)熱器。
2、需要加(jia)熱(re)的深(shen)(shen)度和面積:加(jia)熱(re)深(shen)(shen)度深(shen)(shen),面積大,整體加(jia)熱(re),應選用功(gong)率(lv)大,頻率(lv)低的感(gan)應加(jia)熱(re)設(she)備(bei);加(jia)熱(re)深(shen)(shen)度淺,面積小,局部加(jia)熱(re),選用相對功(gong)率(lv)小,頻率(lv)高(gao)的電磁感(gan)應加(jia)熱(re)設(she)備(bei)。
3、所需的(de)(de)加(jia)熱(re)(re)速度(du):需要(yao)的(de)(de)加(jia)熱(re)(re)速度(du)快,應選用功率(lv)相(xiang)對較大,頻率(lv)相(xiang)對較高的(de)(de)感應加(jia)熱(re)(re)設備。
4、工(gong)藝要求:般(ban)來(lai)說(shuo),淬(cui)火(huo)、焊接等(deng)(deng)工(gong)藝,相對可以功(gong)率選(xuan)小些(xie),頻(pin)率選(xuan)高些(xie);退火(huo)、回火(huo)等(deng)(deng)工(gong)藝,相對功(gong)率選(xuan)大些(xie),頻(pin)率選(xuan)低些(xie);紅沖(chong)、熱(re)殿、熔(rong)煉等(deng)(deng),需要透熱(re)效果好的工(gong)藝,則電磁加熱(re)器功(gong)率應(ying)選(xuan)得更大,頻(pin)率選(xuan)得更低。
電(dian)磁(ci)加(jia)熱(re)(re)(re)(re)器是種(zhong)怎樣的(de)裝置(zhi)(zhi):電(dian)磁(ci)加(jia)熱(re)(re)(re)(re)器是種(zhong)利用電(dian)磁(ci)感應原理(li)將(jiang)電(dian)能轉換(huan)為熱(re)(re)(re)(re)能的(de)裝置(zhi)(zhi)。在電(dian)磁(ci)加(jia)熱(re)(re)(re)(re)器內(nei)(nei)部(bu),由(you)整流(liu)電(dian)路將(jiang)50/60Hz的(de)交流(liu)電(dian)壓(ya)變成直(zhi)流(liu)電(dian)壓(ya),再(zai)經過控制電(dian)路將(jiang)直(zhi)流(liu)電(dian)壓(ya)轉換(huan)成頻率為15-20KHz的(de)高(gao)頻電(dian)壓(ya),高(gao)速(su)變化(hua)的(de)電(dian)流(liu)流(liu)過線圈會產(chan)(chan)生(sheng)高(gao)速(su)變化(hua)的(de)磁(ci)場,當磁(ci)場內(nei)(nei)的(de)磁(ci)力線通過金(jin)屬器皿(導(dao)磁(ci)又導(dao)電(dian)材(cai)料)底部(bu)金(jin)屬體內(nei)(nei)產(chan)(chan)生(sheng)無(wu)數的(de)小渦流(liu),使器皿本(ben)身(shen)(shen)自行高(gao)速(su)發熱(re)(re)(re)(re),然(ran)后再(zai)加(jia)熱(re)(re)(re)(re)器皿內(nei)(nei)的(de)東西。而電(dian)磁(ci)加(jia)熱(re)(re)(re)(re)本(ben)身(shen)(shen)對(dui)器皿和器皿內(nei)(nei)的(de)物品的(de)物理(li)性質和化(hua)學性質不(bu)產(chan)(chan)生(sheng)任何改(gai)變。
電(dian)(dian)磁(ci)(ci)(ci)加(jia)熱(re)器的(de)(de)溫度(du)升不(bu)上去該怎(zen)么辦?第二種(zhong)解(jie)決方法:當造粒機類似于大功(gong)(gong)率(lv)時,安裝電(dian)(dian)磁(ci)(ci)(ci)加(jia)熱(re)器后,溫度(du)總(zong)達(da)不(bu)到。而且電(dian)(dian)磁(ci)(ci)(ci)加(jia)熱(re)器也(ye)直在工(gong)作,電(dian)(dian)流也(ye)正(zheng)常,但是(shi)(shi)(shi)(shi)溫度(du)總(zong)上不(bu)去,般這種(zhong)情(qing)況(kuang)是(shi)(shi)(shi)(shi)功(gong)(gong)率(lv)不(bu)夠大。目(mu)前是(shi)(shi)(shi)(shi)市面(mian)上的(de)(de)些中(zhong)間商用40kw貼個子就(jiu)說是(shi)(shi)(shi)(shi)60kw電(dian)(dian)磁(ci)(ci)(ci)加(jia)熱(re)器的(de)(de)事件見過許多(duo),我們可(ke)(ke)以(yi)(yi)通(tong)過電(dian)(dian)流確定(ding)(ding)下功(gong)(gong)率(lv)到底是(shi)(shi)(shi)(shi)多(duo)少,如果確定(ding)(ding)是(shi)(shi)(shi)(shi)實(shi)際(ji)(ji)功(gong)(gong)率(lv)太小了,可(ke)(ke)以(yi)(yi)加(jia)大實(shi)際(ji)(ji)功(gong)(gong)率(lv)來實(shi)現。要是(shi)(shi)(shi)(shi)確定(ding)(ding)實(shi)際(ji)(ji)功(gong)(gong)率(lv)不(bu)小了,這是(shi)(shi)(shi)(shi)由(you)炮(pao)筒的(de)(de)材料引(yin)起(qi)來的(de)(de),不(bu)同(tong)材質在不(bu)同(tong)的(de)(de)工(gong)作頻(pin)率(lv)時吸收熱(re)量也(ye)不(bu)同(tong)。應該是(shi)(shi)(shi)(shi)嘗試(shi)增加(jia)諧振(zhen)電(dian)(dian)容(rong)容(rong)量,讓Q值(zhi)增加(jia),提(ti)高(gao)線(xian)圈高(gao)頻(pin)電(dian)(dian)流。可(ke)(ke)以(yi)(yi)使炮(pao)筒內(nei)外溫度(du)均勻的(de)(de)來達(da)到提(ti)高(gao)炮(pao)筒的(de)(de)溫度(du)。如果各個方面(mian)的(de)(de)條件可(ke)(ke)以(yi)(yi)的(de)(de)話,可(ke)(ke)以(yi)(yi)試(shi)著去換掉炮(pao)筒試(shi)試(shi)。
電磁感應加熱器使用過(guo)程中線圈溫度過(guo)高原因:
1、電磁加熱器(qi)的(de)(de)(de)高(gao)(gao)溫(wen)電纜線徑小:不(bu)同(tong)功率的(de)(de)(de)電磁加熱控制器(qi)配備的(de)(de)(de)高(gao)(gao)溫(wen)電纜的(de)(de)(de)線徑不(bu)同(tong),是(shi)因為所要(yao)輸送的(de)(de)(de)量不(bu)同(tong),如果通道過窄,單位(wei)空間內(nei)承載(zai)的(de)(de)(de)量超過了它(ta)本身的(de)(de)(de)能(neng)力的(de)(de)(de)話,散發(fa)的(de)(de)(de)熱量自然也就會比正常的(de)(de)(de)要(yao)高(gao)(gao)。
2、電磁加熱控(kong)制(zhi)器的保(bao)溫(wen)(wen)棉(mian)(mian)薄:為了充分發揮保(bao)溫(wen)(wen)棉(mian)(mian)保(bao)溫(wen)(wen)、隔(ge)熱的效(xiao)果(guo),保(bao)溫(wen)(wen)棉(mian)(mian)的厚度通常在15-25mm左右,如(ru)果(guo)厚度過小,料筒熱量散失的就(jiu)多,那高溫(wen)(wen)線纜的溫(wen)(wen)度也就(jiu)會(hui)高;相反,如(ru)果(guo)保(bao)溫(wen)(wen)棉(mian)(mian)厚度過大的話,就(jiu)會(hui)影響高溫(wen)(wen)線纜的電磁感應(ying)效(xiao)果(guo),造成電熱轉(zhuan)換率低,影響設備的工(gong)作效(xiao)率。
3、電(dian)(dian)磁(ci)加(jia)熱器的(de)(de)線(xian)圈(quan)纏(chan)繞(rao)數(shu)少:電(dian)(dian)磁(ci)加(jia)熱器表面線(xian)圈(quan)纏(chan)繞(rao)的(de)(de)圈(quan)數(shu)與電(dian)(dian)感量(liang)大小成(cheng)正比(bi),線(xian)圈(quan)小的(de)(de)話,電(dian)(dian)感量(liang)也就小,那么電(dian)(dian)磁(ci)加(jia)熱控制器就要輸出更多(duo)的(de)(de)電(dian)(dian)流才(cai)能(neng)達到加(jia)熱的(de)(de)效果,高溫電(dian)(dian)纜承載的(de)(de)量(liang)就會多(duo),散(san)發的(de)(de)熱量(liang)也就高。
使用造粒機電(dian)磁加熱器時要知道(dao)的常識:
1、我(wo)們要把(ba)造粒機電磁加(jia)熱器安置在個(ge)牢(lao)固的平(ping)臺上或掛在設備上,其附近(jin)不(bu)(bu)宜(yi)溫度(du)過高,以防止(zhi)散熱不(bu)(bu)好(hao)導致過熱保護。
2、不要將(jiang)控制器安裝在(zai)潮濕的環境中,防止(zhi)水蒸(zheng)汽進入(ru)電(dian)箱后,易(yi)在(zai)緣介質(zhi)表面(mian)凝結,降低其緣性能(neng),造(zao)成漏電(dian)事故(gu)。
3、外部電(dian)源在接入電(dian)磁加熱器前,應(ying)安(an)裝(zhuang)獨立的電(dian)源空氣開(kai)關(guan)保(bao)護裝(zhuang)置。并將金屬外殼要可靠(kao)接地(di)。在使用過(guo)程中,不要輕易拆除(chu)其接地(di)導線,因為接地(di)措施(shi)(shi)是防止觸電(dian)的后道(dao)保(bao)護措施(shi)(shi)。
4、要(yao)定(ding)期清理散熱(re)器,保證產品通風良好。要(yao)經常檢查產品的(de)進風口及散熱(re)風扇(shan),防止進風口處堵塞(sai)或散熱(re)風扇(shan)卡死(si),避免因過熱(re)停(ting)機保護。
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