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成都脫硫泵用機械密封的相關知識普及

發布時間:2021-12-20 15:23:44 人氣:94426 來(lai)源:

  脫硫成都泵用成都機械密封靜(jing)環(huan)(huan)(huan)(huan)(huan)與(yu)殼體、動(dong)(dong)環(huan)(huan)(huan)(huan)(huan)與(yu)軸(zhou)形(xing)成的(de)間(jian)隙(xi)用(yong)(yong)成型(xing)填料密封(feng)。在動(dong)(dong)環(huan)(huan)(huan)(huan)(huan)和(he)(he)靜(jing)環(huan)(huan)(huan)(huan)(huan)接觸的(de)端面形(xing)成相對(dui)滑(hua)(hua)動(dong)(dong)面,即動(dong)(dong)密封(feng)面。為保證(zheng)密封(feng)良好(hao),動(dong)(dong)密封(feng)面應十分平(ping)直和(he)(he)光潔(jie)。彈(dan)簧(huang)(huang)力和(he)(he)被密封(feng)的(de)流體壓力使動(dong)(dong)環(huan)(huan)(huan)(huan)(huan)貼(tie)緊靜(jing)環(huan)(huan)(huan)(huan)(huan)。因動(dong)(dong)環(huan)(huan)(huan)(huan)(huan)與(yu)軸(zhou)通過彈(dan)簧(huang)(huang)連接,動(dong)(dong)環(huan)(huan)(huan)(huan)(huan)和(he)(he)靜(jing)環(huan)(huan)(huan)(huan)(huan)間(jian)貼(tie)合性受軸(zhou)的(de)振動(dong)(dong)和(he)(he)擺動(dong)(dong)影響較小(xiao)。靜(jing)環(huan)(huan)(huan)(huan)(huan)一般常(chang)用(yong)(yong)潤滑(hua)(hua)性好(hao)的(de)軟質材(cai)料如石(shi)墨、填充(chong)聚四(si)氟乙(yi)烯等(deng)(deng),動(dong)(dong)環(huan)(huan)(huan)(huan)(huan)多用(yong)(yong)硬質合金、陶瓷等(deng)(deng)材(cai)料制(zhi)造。


  在結構上(shang)采取(qu)相應措施后,它可用于高(gao)(gao)溫、高(gao)(gao)壓(ya)、高(gao)(gao)真空、高(gao)(gao)速(su)和腐(fu)蝕性工作(zuo)介(jie)質的場(chang)合(he)。門內部壓(ya)力相當時(shi),閘(zha)板(ban)處于閉合(he)狀態,環成(cheng)初(chu)始密(mi)封(feng),每次閥(fa)門開關時(shi),閥(fa)座圈(quan)能(neng)自動清潔閘(zha)板(ban)兩側(ce),壓(ya)力作(zuo)用于閘(zha)板(ban),迫使它貼近出口閥(fa)座上(shang)的PTFE環,壓(ya)縮它直(zhi)到(dao)閘(zha)板(ban)停在鋼制閥(fa)座上(shang),這樣,就形(xing)成(cheng)了雙重(zhong)密(mi)封(feng),首(shou)先(xian)是(shi)PTFE對金屬(shu)密(mi)封(feng),然后是(shi)金屬(shu)對金屬(shu)密(mi)封(feng),閥(fa)座也(ye)被牢固地(di)推(tui)到(dao)凹(ao)槽,在這一點O形(xing)圈(quan)阻止任何后部介(jie)質流。

8.JPG

  形(xing)成進口密封(feng),管(guan)道(dao)壓(ya)(ya)(ya)力作用于(yu)進口閥(fa)座(zuo),使其(qi)移(yi)向閘板(ban),這時形(xing)成PTFE對金(jin)屬(shu)密封(feng),同(tong)時O形(xing)圈與(yu)閥(fa)座(zuo)凹槽(cao)形(xing)成緊密的(de)密封(feng),當(dang)閥(fa)腔壓(ya)(ya)(ya)力大于(yu)管(guan)道(dao)壓(ya)(ya)(ya)力時,由于(yu)熱膨脹,進口閥(fa)座(zuo)推(tui)向凹槽(cao),閥(fa)腔內多余(yu)的(de)壓(ya)(ya)(ya)力在閥(fa)座(zuo)與(yu)閘板(ban)之間泄(xie)放(fang)到管(guan)道(dao)上(shang)。


  脫硫成都泵用成都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,脫硫成都泵用成都機械密封能用于高溫、低溫、高壓、真(zhen)空、不同旋(xuan)轉頻(pin)率,以及各種腐蝕介質和含磨粒介質的密封(feng),在長期運(yun)轉中密封(feng)狀態很穩(wen)定,泄露量很小,其泄露約為軟填料密封(feng)的1%。