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聯系客服,馬上詢價
發布時(shi)間:2021-12-20 15:23:44 人氣:98768 來源:
脫硫洪梅鎮泵用洪梅鎮機械密封靜(jing)環(huan)(huan)(huan)(huan)與(yu)(yu)殼體、動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)與(yu)(yu)軸形(xing)成的(de)間隙(xi)用(yong)(yong)成型填(tian)料密封(feng)。在動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)和靜(jing)環(huan)(huan)(huan)(huan)接(jie)觸的(de)端面形(xing)成相對滑動(dong)(dong)(dong)面,即(ji)動(dong)(dong)(dong)密封(feng)面。為(wei)保證(zheng)密封(feng)良(liang)好,動(dong)(dong)(dong)密封(feng)面應十分平直(zhi)和光潔。彈簧力(li)和被密封(feng)的(de)流(liu)體壓力(li)使動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)貼(tie)緊靜(jing)環(huan)(huan)(huan)(huan)。因動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)與(yu)(yu)軸通過彈簧連(lian)接(jie),動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)和靜(jing)環(huan)(huan)(huan)(huan)間貼(tie)合(he)性受軸的(de)振動(dong)(dong)(dong)和擺(bai)動(dong)(dong)(dong)影(ying)響較小。靜(jing)環(huan)(huan)(huan)(huan)一般常用(yong)(yong)潤滑性好的(de)軟質(zhi)材(cai)料如石墨、填(tian)充聚四氟乙烯等,動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)多用(yong)(yong)硬(ying)質(zhi)合(he)金、陶瓷(ci)等材(cai)料制造。
在(zai)結構上(shang)(shang)采取相應措(cuo)施后,它可用(yong)于高溫(wen)、高壓(ya)、高真空、高速和腐(fu)蝕性工作介(jie)質的場合。門(men)內(nei)部壓(ya)力相當(dang)時,閘(zha)板處于閉合狀態,環成初始密(mi)封(feng)(feng),每次閥門(men)開關時,閥座(zuo)(zuo)圈能自動清潔閘(zha)板兩側,壓(ya)力作用(yong)于閘(zha)板,迫使它貼(tie)近出口閥座(zuo)(zuo)上(shang)(shang)的PTFE環,壓(ya)縮它直到閘(zha)板停在(zai)鋼制閥座(zuo)(zuo)上(shang)(shang),這樣,就形(xing)(xing)成了雙重(zhong)密(mi)封(feng)(feng),首(shou)先是(shi)PTFE對金屬(shu)密(mi)封(feng)(feng),然(ran)后是(shi)金屬(shu)對金屬(shu)密(mi)封(feng)(feng),閥座(zuo)(zuo)也(ye)被牢(lao)固地(di)推到凹槽,在(zai)這一(yi)點O形(xing)(xing)圈阻止任何后部介(jie)質流(liu)。
形(xing)成(cheng)進(jin)口(kou)密(mi)封(feng),管(guan)道壓力(li)(li)作用(yong)于(yu)進(jin)口(kou)閥(fa)座,使其移向閘(zha)板,這時形(xing)成(cheng)PTFE對金屬密(mi)封(feng),同(tong)時O形(xing)圈與閥(fa)座凹槽(cao)形(xing)成(cheng)緊(jin)密(mi)的密(mi)封(feng),當閥(fa)腔(qiang)壓力(li)(li)大于(yu)管(guan)道壓力(li)(li)時,由于(yu)熱膨脹,進(jin)口(kou)閥(fa)座推向凹槽(cao),閥(fa)腔(qiang)內多(duo)余(yu)的壓力(li)(li)在閥(fa)座與閘(zha)板之間泄(xie)放到(dao)管(guan)道上(shang)。
脫硫洪梅鎮泵用洪梅鎮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,脫硫洪梅鎮泵用洪梅鎮機械密封能用(yong)于高(gao)溫、低溫、高(gao)壓、真(zhen)空、不同旋轉(zhuan)頻率,以及各種腐蝕介質(zhi)和(he)含磨粒介質(zhi)的(de)密(mi)封,在(zai)長期運轉(zhuan)中密(mi)封狀態很(hen)穩定,泄露量(liang)很(hen)小,其泄露約為(wei)軟填(tian)料(liao)密(mi)封的(de)1%。