脫硫運城泵用運城機械密封靜(jing)(jing)(jing)環(huan)(huan)(huan)(huan)與(yu)(yu)殼體、動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)與(yu)(yu)軸形(xing)成的(de)間(jian)隙用成型填(tian)(tian)料密(mi)封(feng)(feng)。在(zai)動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)和(he)靜(jing)(jing)(jing)環(huan)(huan)(huan)(huan)接觸(chu)的(de)端面(mian)形(xing)成相對(dui)滑動(dong)(dong)(dong)(dong)面(mian)，即動(dong)(dong)(dong)(dong)密(mi)封(feng)(feng)面(mian)。為(wei)保證密(mi)封(feng)(feng)良好(hao)，動(dong)(dong)(dong)(dong)密(mi)封(feng)(feng)面(mian)應(ying)十分平直(zhi)和(he)光潔。彈簧力和(he)被密(mi)封(feng)(feng)的(de)流體壓力使動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)貼(tie)緊靜(jing)(jing)(jing)環(huan)(huan)(huan)(huan)。因動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)與(yu)(yu)軸通過(guo)彈簧連接，動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)和(he)靜(jing)(jing)(jing)環(huan)(huan)(huan)(huan)間(jian)貼(tie)合性受軸的(de)振動(dong)(dong)(dong)(dong)和(he)擺動(dong)(dong)(dong)(dong)影響較小(xiao)。靜(jing)(jing)(jing)環(huan)(huan)(huan)(huan)一般常用潤滑性好(hao)的(de)軟質材料如石墨、填(tian)(tian)充聚四(si)氟乙烯等，動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)多用硬質合金、陶(tao)瓷等材料制造。

　　在結構上采取相應措(cuo)施(shi)后，它可用于(yu)高(gao)溫、高(gao)壓(ya)、高(gao)真空、高(gao)速和腐(fu)蝕性工作(zuo)介質的場合(he)。門(men)內部壓(ya)力相當時，閘板(ban)(ban)(ban)處于(yu)閉合(he)狀態(tai)，環(huan)成初始密(mi)(mi)封，每次閥門(men)開關(guan)時，閥座(zuo)(zuo)圈能自動清潔閘板(ban)(ban)(ban)兩側，壓(ya)力作(zuo)用于(yu)閘板(ban)(ban)(ban)，迫使(shi)它貼近出口閥座(zuo)(zuo)上的PTFE環(huan)，壓(ya)縮它直(zhi)到(dao)閘板(ban)(ban)(ban)停(ting)在鋼制閥座(zuo)(zuo)上，這樣，就形成了雙重密(mi)(mi)封，首先是(shi)PTFE對金(jin)屬密(mi)(mi)封，然后是(shi)金(jin)屬對金(jin)屬密(mi)(mi)封，閥座(zuo)(zuo)也被牢(lao)固地推到(dao)凹槽(cao)，在這一點(dian)O形圈阻止任(ren)何(he)后部介質流。

　　形成進口(kou)密封，管道(dao)壓(ya)力(li)(li)(li)作用于(yu)(yu)進口(kou)閥(fa)(fa)座(zuo)(zuo)，使(shi)其(qi)移向閘板(ban)，這時(shi)(shi)形成PTFE對金屬密封，同時(shi)(shi)O形圈(quan)與(yu)閥(fa)(fa)座(zuo)(zuo)凹(ao)槽形成緊密的(de)密封，當閥(fa)(fa)腔(qiang)壓(ya)力(li)(li)(li)大于(yu)(yu)管道(dao)壓(ya)力(li)(li)(li)時(shi)(shi)，由(you)于(yu)(yu)熱膨脹，進口(kou)閥(fa)(fa)座(zuo)(zuo)推向凹(ao)槽，閥(fa)(fa)腔(qiang)內多余的(de)壓(ya)力(li)(li)(li)在閥(fa)(fa)座(zuo)(zuo)與(yu)閘板(ban)之(zhi)間(jian)泄放到管道(dao)上。

　　脫硫運城泵用運城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，脫硫運城泵用運城機械密封能用于(yu)高溫(wen)、低溫(wen)、高壓、真空、不同旋轉頻率，以及各種腐(fu)蝕介(jie)質和(he)含磨粒介(jie)質的密(mi)封，在長期(qi)運轉中(zhong)密(mi)封狀態很穩定，泄露(lu)量(liang)很小，其(qi)泄露(lu)約為(wei)軟填料密(mi)封的1%。