掃一掃,加微信
聯系客服,馬上詢價
發布時間(jian):2021-12-20 15:23:44 人氣:94559 來源:
脫硫大冶泵用大冶機械密封靜(jing)(jing)(jing)環(huan)(huan)(huan)與(yu)殼體、動(dong)(dong)(dong)環(huan)(huan)(huan)與(yu)軸形成的間隙用成型填料密封(feng)(feng)。在動(dong)(dong)(dong)環(huan)(huan)(huan)和(he)(he)靜(jing)(jing)(jing)環(huan)(huan)(huan)接觸的端面形成相對滑(hua)動(dong)(dong)(dong)面,即動(dong)(dong)(dong)密封(feng)(feng)面。為保證密封(feng)(feng)良好(hao),動(dong)(dong)(dong)密封(feng)(feng)面應十分平直和(he)(he)光(guang)潔。彈(dan)簧力和(he)(he)被密封(feng)(feng)的流體壓力使動(dong)(dong)(dong)環(huan)(huan)(huan)貼緊靜(jing)(jing)(jing)環(huan)(huan)(huan)。因(yin)動(dong)(dong)(dong)環(huan)(huan)(huan)與(yu)軸通過彈(dan)簧連(lian)接,動(dong)(dong)(dong)環(huan)(huan)(huan)和(he)(he)靜(jing)(jing)(jing)環(huan)(huan)(huan)間貼合性受(shou)軸的振(zhen)動(dong)(dong)(dong)和(he)(he)擺動(dong)(dong)(dong)影響較小。靜(jing)(jing)(jing)環(huan)(huan)(huan)一般常用潤滑(hua)性好(hao)的軟質材料如(ru)石墨(mo)、填充(chong)聚四氟乙烯等(deng),動(dong)(dong)(dong)環(huan)(huan)(huan)多用硬(ying)質合金、陶瓷等(deng)材料制(zhi)造(zao)。
在(zai)結構上采取相應(ying)措施后(hou),它可用(yong)(yong)于(yu)高(gao)溫、高(gao)壓(ya)、高(gao)真空、高(gao)速和腐蝕性工作介質(zhi)的場合。門(men)內部(bu)壓(ya)力(li)相當時,閘(zha)(zha)板(ban)處于(yu)閉(bi)合狀態,環成初始密(mi)封(feng)(feng),每次閥(fa)門(men)開關(guan)時,閥(fa)座(zuo)圈(quan)能自動(dong)清潔閘(zha)(zha)板(ban)兩側,壓(ya)力(li)作用(yong)(yong)于(yu)閘(zha)(zha)板(ban),迫使(shi)它貼(tie)近出口(kou)閥(fa)座(zuo)上的PTFE環,壓(ya)縮它直到閘(zha)(zha)板(ban)停在(zai)鋼制閥(fa)座(zuo)上,這(zhe)樣,就形成了雙重密(mi)封(feng)(feng),首先是(shi)PTFE對金(jin)屬(shu)(shu)(shu)密(mi)封(feng)(feng),然后(hou)是(shi)金(jin)屬(shu)(shu)(shu)對金(jin)屬(shu)(shu)(shu)密(mi)封(feng)(feng),閥(fa)座(zuo)也被牢固地推到凹(ao)槽,在(zai)這(zhe)一(yi)點O形圈(quan)阻止任(ren)何后(hou)部(bu)介質(zhi)流。
形成進口密封(feng),管道(dao)壓力作(zuo)用于(yu)進口閥(fa)(fa)(fa)座(zuo),使其移向(xiang)閘(zha)板(ban),這時(shi)形成PTFE對金屬密封(feng),同時(shi)O形圈與閥(fa)(fa)(fa)座(zuo)凹(ao)槽形成緊(jin)密的(de)密封(feng),當閥(fa)(fa)(fa)腔(qiang)壓力大于(yu)管道(dao)壓力時(shi),由(you)于(yu)熱(re)膨脹,進口閥(fa)(fa)(fa)座(zuo)推向(xiang)凹(ao)槽,閥(fa)(fa)(fa)腔(qiang)內(nei)多(duo)余(yu)的(de)壓力在(zai)閥(fa)(fa)(fa)座(zuo)與閘(zha)板(ban)之間(jian)泄(xie)放到管道(dao)上。
脫硫大冶泵用大冶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,脫硫大冶泵用大冶機械密封能用于高溫、低溫、高壓、真空、不同旋(xuan)轉頻率,以及各種(zhong)腐蝕介質(zhi)和(he)含(han)磨粒(li)介質(zhi)的密(mi)(mi)封(feng),在長期運(yun)轉中密(mi)(mi)封(feng)狀態很(hen)穩(wen)定,泄露量(liang)很(hen)小,其泄露約(yue)為軟(ruan)填料密(mi)(mi)封(feng)的1%。