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鄭州巴特詳解熔體計(jì)量泵的密封類型及各自特點(diǎn)
來源： 發(fā)布時(shí)間：2018-08-29 10:54:36 瀏覽次數(shù)：次
機(jī)械密封、填料密封和螺旋密封是熔體計(jì)量泵密封中常見的；但是，機(jī)械密封由于熔體溫度高，彈簧和鍥型環(huán)易變形以及熔體中的雜質(zhì)的存在，使其壽命短，一般為半年左右，而且費(fèi)用高。填料密封由于填料和軸套的磨損快，而且需要常壓緊填料，更換頻繁。因而機(jī)械密封和填料密封都會(huì)造成維修工作量增大，更換頻繁的情況發(fā)生，由于聚合物加工一般是連續(xù)性生產(chǎn)，維修量的增大給安全生產(chǎn)帶來很大的困難。經(jīng)過熔體計(jì)量泵的螺旋密封改造優(yōu)化，熔體計(jì)量泵在螺旋密封的使用方面已經(jīng)取得了良好的效果。
1、間隙密封與聚四氛型密封共同構(gòu)成水冷密封。這種密封實(shí)際上并不接觸軸的表面，它的密封原理是將聚合物冷卻到半熔融狀態(tài)而形成自密封。2、填料密封。這種密封結(jié)構(gòu)簡(jiǎn)單，但填料易于磨損，實(shí)踐證明很容易發(fā)生泄漏。一般只在小型的實(shí)驗(yàn)裝置中使用。3、螺旋密封。在軸封內(nèi)表面上加工有反向螺旋槽，可使聚合物被反壓回到進(jìn)口。槽的尺寸必須經(jīng)過計(jì)算機(jī)優(yōu)化設(shè)計(jì)以達(dá)到佳動(dòng)態(tài)密封效果。鄭州專業(yè)計(jì)量泵生產(chǎn)廠家，在國(guó)內(nèi)多個(gè)省市地區(qū)擁有眾多案例現(xiàn)場(chǎng)，可免費(fèi)帶領(lǐng)用戶實(shí)地參觀考察。鄭州計(jì)量泵：www.www.bjxbb.com
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