掃一掃,加微信
聯系客服,馬上詢價
發布時間:2021-12-20 15:23:44 人氣(qi):94498 來源:
脫硫中陽泵用中陽機械密封靜(jing)(jing)環(huan)與(yu)殼體、動(dong)(dong)(dong)(dong)環(huan)與(yu)軸(zhou)形(xing)成的(de)間隙用(yong)成型填(tian)料密封(feng)(feng)。在動(dong)(dong)(dong)(dong)環(huan)和靜(jing)(jing)環(huan)接觸的(de)端(duan)面形(xing)成相對滑(hua)(hua)動(dong)(dong)(dong)(dong)面,即動(dong)(dong)(dong)(dong)密封(feng)(feng)面。為保證密封(feng)(feng)良好,動(dong)(dong)(dong)(dong)密封(feng)(feng)面應(ying)十分平(ping)直和光潔(jie)。彈簧(huang)力和被密封(feng)(feng)的(de)流(liu)體壓力使動(dong)(dong)(dong)(dong)環(huan)貼緊靜(jing)(jing)環(huan)。因動(dong)(dong)(dong)(dong)環(huan)與(yu)軸(zhou)通過彈簧(huang)連接,動(dong)(dong)(dong)(dong)環(huan)和靜(jing)(jing)環(huan)間貼合性受軸(zhou)的(de)振動(dong)(dong)(dong)(dong)和擺動(dong)(dong)(dong)(dong)影(ying)響(xiang)較小。靜(jing)(jing)環(huan)一(yi)般常用(yong)潤滑(hua)(hua)性好的(de)軟質(zhi)材料如石(shi)墨、填(tian)充聚四氟(fu)乙烯(xi)等,動(dong)(dong)(dong)(dong)環(huan)多用(yong)硬質(zhi)合金(jin)、陶瓷等材料制(zhi)造。
在(zai)(zai)結構(gou)上(shang)采(cai)取相應(ying)措施后,它(ta)可用于高(gao)(gao)溫、高(gao)(gao)壓(ya)、高(gao)(gao)真空、高(gao)(gao)速和腐蝕性(xing)工作介(jie)質(zhi)的場(chang)合。門(men)內部壓(ya)力相當(dang)時,閘板(ban)處于閉合狀(zhuang)態,環成(cheng)初始密(mi)封(feng),每次閥(fa)(fa)門(men)開(kai)關(guan)時,閥(fa)(fa)座(zuo)圈能自動清潔閘板(ban)兩側,壓(ya)力作用于閘板(ban),迫使它(ta)貼近出口閥(fa)(fa)座(zuo)上(shang)的PTFE環,壓(ya)縮它(ta)直到(dao)閘板(ban)停在(zai)(zai)鋼制閥(fa)(fa)座(zuo)上(shang),這(zhe)樣,就形成(cheng)了(le)雙重密(mi)封(feng),首(shou)先是PTFE對金(jin)屬(shu)密(mi)封(feng),然(ran)后是金(jin)屬(shu)對金(jin)屬(shu)密(mi)封(feng),閥(fa)(fa)座(zuo)也被(bei)牢固地(di)推(tui)到(dao)凹槽,在(zai)(zai)這(zhe)一點(dian)O形圈阻(zu)止任何(he)后部介(jie)質(zhi)流。
形(xing)成(cheng)(cheng)進口密(mi)封(feng),管(guan)(guan)道(dao)壓力作用于(yu)進口閥座,使其移向(xiang)閘板,這(zhe)時形(xing)成(cheng)(cheng)PTFE對金屬密(mi)封(feng),同時O形(xing)圈與(yu)閥座凹槽(cao)形(xing)成(cheng)(cheng)緊密(mi)的密(mi)封(feng),當閥腔壓力大于(yu)管(guan)(guan)道(dao)壓力時,由于(yu)熱膨脹,進口閥座推向(xiang)凹槽(cao),閥腔內多余(yu)的壓力在閥座與(yu)閘板之間(jian)泄放到管(guan)(guan)道(dao)上(shang)。
脫硫中陽泵用中陽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,脫硫中陽泵用中陽機械密封能用于高溫、低溫、高壓、真空(kong)、不同旋轉頻率(lv),以及各種腐蝕介質和(he)含磨粒介質的密(mi)封,在(zai)長期運(yun)轉中密(mi)封狀態(tai)很(hen)穩定(ding),泄(xie)露量很(hen)小,其泄(xie)露約(yue)為軟填料密(mi)封的1%。