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聯系客服,馬上詢價
發布時間:2021-12-20 15:23:44 人氣(qi):98717 來(lai)源:
脫硫桑珠孜泵用桑珠孜機械密封靜環(huan)(huan)(huan)(huan)與殼體、動(dong)(dong)環(huan)(huan)(huan)(huan)與軸形成的(de)(de)間隙用(yong)(yong)成型(xing)填料密封。在動(dong)(dong)環(huan)(huan)(huan)(huan)和(he)靜環(huan)(huan)(huan)(huan)接(jie)觸(chu)的(de)(de)端面(mian)形成相對滑動(dong)(dong)面(mian),即動(dong)(dong)密封面(mian)。為(wei)保(bao)證密封良好,動(dong)(dong)密封面(mian)應十分平直和(he)光潔。彈(dan)簧力和(he)被密封的(de)(de)流體壓力使(shi)動(dong)(dong)環(huan)(huan)(huan)(huan)貼(tie)(tie)緊(jin)靜環(huan)(huan)(huan)(huan)。因動(dong)(dong)環(huan)(huan)(huan)(huan)與軸通過彈(dan)簧連接(jie),動(dong)(dong)環(huan)(huan)(huan)(huan)和(he)靜環(huan)(huan)(huan)(huan)間貼(tie)(tie)合性(xing)受軸的(de)(de)振動(dong)(dong)和(he)擺(bai)動(dong)(dong)影響較小。靜環(huan)(huan)(huan)(huan)一般常用(yong)(yong)潤滑性(xing)好的(de)(de)軟質材(cai)料如石墨、填充聚四氟乙烯等(deng),動(dong)(dong)環(huan)(huan)(huan)(huan)多用(yong)(yong)硬質合金(jin)、陶瓷等(deng)材(cai)料制造。
在結構上采取相(xiang)應措施后(hou),它可用于(yu)高溫、高壓、高真空、高速和(he)腐蝕(shi)性工(gong)作(zuo)介質的場合(he)。門(men)內部壓力(li)相(xiang)當(dang)時,閘板處于(yu)閉合(he)狀態(tai),環成初始(shi)密封(feng),每次閥門(men)開關時,閥座(zuo)(zuo)(zuo)圈能自(zi)動清潔閘板兩(liang)側,壓力(li)作(zuo)用于(yu)閘板,迫使它貼近出(chu)口閥座(zuo)(zuo)(zuo)上的PTFE環,壓縮它直到閘板停在鋼制閥座(zuo)(zuo)(zuo)上,這樣,就形(xing)成了(le)雙重密封(feng),首(shou)先是PTFE對金(jin)屬(shu)密封(feng),然后(hou)是金(jin)屬(shu)對金(jin)屬(shu)密封(feng),閥座(zuo)(zuo)(zuo)也被牢固地(di)推到凹槽(cao),在這一點O形(xing)圈阻止任何后(hou)部介質流。
形(xing)成(cheng)進口密(mi)(mi)封(feng)(feng),管(guan)道壓(ya)力作用于進口閥座(zuo),使其移向閘(zha)板,這時(shi)形(xing)成(cheng)PTFE對金屬密(mi)(mi)封(feng)(feng),同(tong)時(shi)O形(xing)圈與閥座(zuo)凹槽形(xing)成(cheng)緊密(mi)(mi)的密(mi)(mi)封(feng)(feng),當閥腔(qiang)壓(ya)力大于管(guan)道壓(ya)力時(shi),由于熱膨脹,進口閥座(zuo)推向凹槽,閥腔(qiang)內多余的壓(ya)力在閥座(zuo)與閘(zha)板之間泄放(fang)到管(guan)道上。
脫硫桑珠孜泵用桑珠孜機械密封采用帶自密封能力的填料結構,無需經常調節,開、關極為輕便,且密封性可靠,填料函處設有輔助密封油脂注入結構,整體鑄造托架止動裝置,定位組裝的托架閥瓣,使得閥座更加穩定可靠,軸或軸套基本上不磨損,端面磨損后可自動補償,一般情況下不需經常性維修,脫硫桑珠孜泵用桑珠孜機械密封能用于高(gao)溫、低(di)溫、高(gao)壓、真空、不同旋轉頻率,以及(ji)各種腐蝕介質(zhi)和(he)含磨粒介質(zhi)的(de)密封(feng),在長期運轉中密封(feng)狀(zhuang)態很(hen)(hen)穩定,泄(xie)露(lu)量很(hen)(hen)小(xiao),其泄(xie)露(lu)約為軟填料密封(feng)的(de)1%。