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發布時間:2021-12-20 15:23:44 人氣:99286 來源:
脫硫阜南泵用阜南機械密封靜(jing)(jing)(jing)環(huan)與殼(ke)體、動(dong)(dong)(dong)(dong)環(huan)與軸(zhou)形(xing)成(cheng)的間隙(xi)用成(cheng)型填料密(mi)(mi)封。在動(dong)(dong)(dong)(dong)環(huan)和(he)靜(jing)(jing)(jing)環(huan)接觸的端面形(xing)成(cheng)相對(dui)滑(hua)動(dong)(dong)(dong)(dong)面,即動(dong)(dong)(dong)(dong)密(mi)(mi)封面。為保證密(mi)(mi)封良好,動(dong)(dong)(dong)(dong)密(mi)(mi)封面應(ying)十分(fen)平直(zhi)和(he)光潔。彈(dan)簧力(li)和(he)被密(mi)(mi)封的流體壓力(li)使動(dong)(dong)(dong)(dong)環(huan)貼緊(jin)靜(jing)(jing)(jing)環(huan)。因(yin)動(dong)(dong)(dong)(dong)環(huan)與軸(zhou)通過彈(dan)簧連(lian)接,動(dong)(dong)(dong)(dong)環(huan)和(he)靜(jing)(jing)(jing)環(huan)間貼合性受軸(zhou)的振動(dong)(dong)(dong)(dong)和(he)擺動(dong)(dong)(dong)(dong)影響(xiang)較小。靜(jing)(jing)(jing)環(huan)一般常用潤(run)滑(hua)性好的軟質材料如石墨、填充聚四氟(fu)乙烯等,動(dong)(dong)(dong)(dong)環(huan)多用硬質合金、陶瓷等材料制造。
在(zai)結構上(shang)采取相應措施后(hou),它(ta)可(ke)用(yong)于高溫、高壓(ya)(ya)、高真空、高速和腐蝕(shi)性工作(zuo)(zuo)介質(zhi)的場合。門內部壓(ya)(ya)力相當時,閘(zha)(zha)板處于閉合狀態,環成(cheng)初(chu)始密封,每次閥(fa)(fa)門開關時,閥(fa)(fa)座圈(quan)能自動清潔閘(zha)(zha)板兩側,壓(ya)(ya)力作(zuo)(zuo)用(yong)于閘(zha)(zha)板,迫使它(ta)貼近(jin)出口閥(fa)(fa)座上(shang)的PTFE環,壓(ya)(ya)縮(suo)它(ta)直到閘(zha)(zha)板停在(zai)鋼制閥(fa)(fa)座上(shang),這樣,就形成(cheng)了雙(shuang)重(zhong)密封,首先是PTFE對金屬密封,然后(hou)是金屬對金屬密封,閥(fa)(fa)座也被牢固(gu)地推到凹(ao)槽,在(zai)這一點O形圈(quan)阻(zu)止任何后(hou)部介質(zhi)流。
形(xing)成(cheng)進口(kou)密封,管(guan)道壓(ya)(ya)力作用于進口(kou)閥(fa)(fa)座,使其(qi)移向閘(zha)板,這時(shi)(shi)形(xing)成(cheng)PTFE對金屬密封,同時(shi)(shi)O形(xing)圈(quan)與(yu)閥(fa)(fa)座凹槽形(xing)成(cheng)緊密的(de)(de)密封,當閥(fa)(fa)腔(qiang)壓(ya)(ya)力大于管(guan)道壓(ya)(ya)力時(shi)(shi),由于熱膨脹,進口(kou)閥(fa)(fa)座推(tui)向凹槽,閥(fa)(fa)腔(qiang)內多余的(de)(de)壓(ya)(ya)力在閥(fa)(fa)座與(yu)閘(zha)板之間泄放到管(guan)道上。
脫硫阜南泵用阜南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,脫硫阜南泵用阜南機械密封能用于高(gao)溫(wen)、低(di)溫(wen)、高(gao)壓(ya)、真空、不同(tong)旋轉(zhuan)頻率,以(yi)及各種腐蝕介質和含磨粒介質的密(mi)封,在(zai)長期運轉(zhuan)中密(mi)封狀(zhuang)態很穩定,泄(xie)露量很小,其(qi)泄(xie)露約為(wei)軟填(tian)料密(mi)封的1%。