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聯系客服,馬上詢價
發布時間:2021-12-20 15:23:44 人氣:99735 來源:
脫硫沙依巴克泵用沙依巴克機械密封靜環(huan)(huan)與殼體(ti)、動(dong)(dong)(dong)(dong)環(huan)(huan)與軸形成(cheng)(cheng)的間隙用(yong)成(cheng)(cheng)型填(tian)料(liao)密(mi)封。在動(dong)(dong)(dong)(dong)環(huan)(huan)和(he)(he)靜環(huan)(huan)接(jie)觸的端(duan)面(mian)形成(cheng)(cheng)相對滑動(dong)(dong)(dong)(dong)面(mian),即動(dong)(dong)(dong)(dong)密(mi)封面(mian)。為保證密(mi)封良好,動(dong)(dong)(dong)(dong)密(mi)封面(mian)應十分平直和(he)(he)光潔(jie)。彈簧力(li)和(he)(he)被密(mi)封的流體(ti)壓力(li)使動(dong)(dong)(dong)(dong)環(huan)(huan)貼(tie)緊靜環(huan)(huan)。因動(dong)(dong)(dong)(dong)環(huan)(huan)與軸通過(guo)彈簧連接(jie),動(dong)(dong)(dong)(dong)環(huan)(huan)和(he)(he)靜環(huan)(huan)間貼(tie)合性受軸的振動(dong)(dong)(dong)(dong)和(he)(he)擺動(dong)(dong)(dong)(dong)影響較(jiao)小(xiao)。靜環(huan)(huan)一(yi)般(ban)常(chang)用(yong)潤滑性好的軟質材料(liao)如石(shi)墨、填(tian)充聚四(si)氟乙烯等,動(dong)(dong)(dong)(dong)環(huan)(huan)多用(yong)硬質合金、陶瓷等材料(liao)制造。
在(zai)結構上采取相(xiang)應措施后(hou),它可用(yong)于高溫、高壓、高真空、高速和腐蝕性工作介質(zhi)的場(chang)合。門(men)內部壓力相(xiang)當時,閘板(ban)處于閉合狀態,環成(cheng)初始密(mi)封(feng)(feng),每(mei)次閥(fa)(fa)門(men)開關(guan)時,閥(fa)(fa)座(zuo)(zuo)圈能自動(dong)清(qing)潔閘板(ban)兩側,壓力作用(yong)于閘板(ban),迫使它貼近出(chu)口(kou)閥(fa)(fa)座(zuo)(zuo)上的PTFE環,壓縮(suo)它直(zhi)到(dao)閘板(ban)停在(zai)鋼制閥(fa)(fa)座(zuo)(zuo)上,這(zhe)樣,就形成(cheng)了雙(shuang)重(zhong)密(mi)封(feng)(feng),首(shou)先是PTFE對(dui)(dui)金屬(shu)密(mi)封(feng)(feng),然后(hou)是金屬(shu)對(dui)(dui)金屬(shu)密(mi)封(feng)(feng),閥(fa)(fa)座(zuo)(zuo)也被牢固地(di)推(tui)到(dao)凹槽,在(zai)這(zhe)一點(dian)O形圈阻(zu)止(zhi)任何(he)后(hou)部介質(zhi)流。
形(xing)成進(jin)口(kou)密(mi)封,管(guan)道(dao)壓(ya)(ya)力(li)作用于(yu)進(jin)口(kou)閥座,使其移向閘板,這時(shi)(shi)形(xing)成PTFE對金屬密(mi)封,同時(shi)(shi)O形(xing)圈(quan)與閥座凹槽形(xing)成緊(jin)密(mi)的密(mi)封,當閥腔(qiang)壓(ya)(ya)力(li)大(da)于(yu)管(guan)道(dao)壓(ya)(ya)力(li)時(shi)(shi),由于(yu)熱(re)膨脹,進(jin)口(kou)閥座推向凹槽,閥腔(qiang)內多余的壓(ya)(ya)力(li)在閥座與閘板之間泄放到管(guan)道(dao)上。
脫硫沙依巴克泵用沙依巴克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,脫硫沙依巴克泵用沙依巴克機械密封能用于(yu)高溫(wen)、低溫(wen)、高壓、真空、不同旋轉頻率,以及(ji)各種腐(fu)蝕介質和含磨粒介質的密封,在(zai)長期運轉中(zhong)密封狀(zhuang)態很穩(wen)定(ding),泄露量很小(xiao),其泄露約(yue)為軟(ruan)填料密封的1%。