掃一掃,加微信
聯系客服,馬上詢價
發布(bu)時(shi)間:2021-12-20 15:23:44 人氣:98765 來(lai)源(yuan):
脫硫交城泵用交城機械密封靜(jing)(jing)環(huan)(huan)與殼體、動(dong)(dong)(dong)環(huan)(huan)與軸形成(cheng)的(de)(de)(de)間隙(xi)用成(cheng)型填料(liao)密(mi)封(feng)(feng)(feng)。在動(dong)(dong)(dong)環(huan)(huan)和(he)靜(jing)(jing)環(huan)(huan)接觸(chu)的(de)(de)(de)端面(mian)形成(cheng)相對滑(hua)動(dong)(dong)(dong)面(mian),即動(dong)(dong)(dong)密(mi)封(feng)(feng)(feng)面(mian)。為保(bao)證密(mi)封(feng)(feng)(feng)良好,動(dong)(dong)(dong)密(mi)封(feng)(feng)(feng)面(mian)應十分平直和(he)光潔。彈簧力和(he)被密(mi)封(feng)(feng)(feng)的(de)(de)(de)流體壓力使動(dong)(dong)(dong)環(huan)(huan)貼緊靜(jing)(jing)環(huan)(huan)。因動(dong)(dong)(dong)環(huan)(huan)與軸通過彈簧連(lian)接,動(dong)(dong)(dong)環(huan)(huan)和(he)靜(jing)(jing)環(huan)(huan)間貼合性受軸的(de)(de)(de)振動(dong)(dong)(dong)和(he)擺動(dong)(dong)(dong)影響(xiang)較(jiao)小(xiao)。靜(jing)(jing)環(huan)(huan)一般常用潤滑(hua)性好的(de)(de)(de)軟質材(cai)料(liao)如(ru)石(shi)墨(mo)、填充聚四氟(fu)乙烯(xi)等(deng),動(dong)(dong)(dong)環(huan)(huan)多用硬質合金、陶瓷(ci)等(deng)材(cai)料(liao)制造。
在(zai)(zai)結構上(shang)采取相應措施后(hou),它可用于(yu)高(gao)溫、高(gao)壓(ya)、高(gao)真空、高(gao)速(su)和腐蝕性工作介質的場合。門(men)內部(bu)壓(ya)力(li)(li)相當時,閘板(ban)(ban)處于(yu)閉合狀態,環(huan)成初始密(mi)封(feng),每(mei)次閥門(men)開關時,閥座(zuo)(zuo)圈(quan)能(neng)自動清潔閘板(ban)(ban)兩(liang)側,壓(ya)力(li)(li)作用于(yu)閘板(ban)(ban),迫使它貼近出口閥座(zuo)(zuo)上(shang)的PTFE環(huan),壓(ya)縮它直到(dao)閘板(ban)(ban)停在(zai)(zai)鋼制閥座(zuo)(zuo)上(shang),這樣,就形成了雙重密(mi)封(feng),首(shou)先是(shi)PTFE對(dui)金屬密(mi)封(feng),然(ran)后(hou)是(shi)金屬對(dui)金屬密(mi)封(feng),閥座(zuo)(zuo)也被牢固(gu)地(di)推到(dao)凹(ao)槽,在(zai)(zai)這一(yi)點O形圈(quan)阻(zu)止任何后(hou)部(bu)介質流。
形(xing)成(cheng)進(jin)(jin)口(kou)(kou)密(mi)封(feng),管(guan)道(dao)(dao)壓力作用于進(jin)(jin)口(kou)(kou)閥座(zuo),使其移向(xiang)閘板(ban)(ban),這(zhe)時形(xing)成(cheng)PTFE對金(jin)屬密(mi)封(feng),同時O形(xing)圈與閥座(zuo)凹槽形(xing)成(cheng)緊(jin)密(mi)的密(mi)封(feng),當閥腔壓力大于管(guan)道(dao)(dao)壓力時,由于熱膨脹,進(jin)(jin)口(kou)(kou)閥座(zuo)推(tui)向(xiang)凹槽,閥腔內(nei)多余的壓力在(zai)閥座(zuo)與閘板(ban)(ban)之間泄放到管(guan)道(dao)(dao)上。
脫硫交城泵用交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,脫硫交城泵用交城機械密封能用于高溫、低溫、高壓、真空(kong)、不同旋轉頻(pin)率,以(yi)及(ji)各種腐蝕(shi)介(jie)質和含(han)磨粒介(jie)質的(de)密(mi)(mi)封,在長期運轉中密(mi)(mi)封狀態很穩定(ding),泄(xie)露量(liang)很小,其泄(xie)露約為軟填料密(mi)(mi)封的(de)1%。