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發布時間:2021-05-18 16:38:54 人氣:251779 來源:
海寧泵用海寧機械密封技術在現代流體工程技術中所占的分量雖然不是太大,但也不容忽視。那么,在海寧泵用海寧機械密封檢查時需要注意什么呢?
1、彈(dan)簧(huang)壓(ya)縮(suo)量(liang)越(yue)大(da)(da)密(mi)封效果越(yue)好(hao)。其實(shi)不(bu)然,彈(dan)簧(huang)壓(ya)縮(suo)量(liang)過大(da)(da),可導(dao)致摩擦(ca)副急劇磨損,瞬間燒(shao)損;過度(du)的壓(ya)縮(suo)使彈(dan)簧(huang)失(shi)去調節動環(huan)端面的能力,導(dao)致密(mi)封失(shi)效。
2、動(dong)(dong)環密封(feng)圖越緊(jin)越好。其實(shi)動(dong)(dong)環密封(feng)圈(quan)過緊(jin)有害無(wu)益。一(yi)是加劇密封(feng)圈(quan)與(yu)軸套間的(de)磨損,過早泄漏;二是增大了動(dong)(dong)環軸向調(diao)整、移動(dong)(dong)的(de)阻力,在工(gong)況變(bian)(bian)化(hua)頻繁時無(wu)法適時進行調(diao)整;三是彈簧(huang)過度疲(pi)勞(lao)易損壞(huai);四(si)是使動(dong)(dong)環密封(feng)圈(quan)變(bian)(bian)形(xing),影(ying)響密封(feng)效果。
3、靜環(huan)密(mi)封(feng)圈越緊(jin)越好(hao)。靜環(huan)密(mi)封(feng)圈基本(ben)處(chu)于靜止(zhi)狀(zhuang)態,相對較(jiao)(jiao)緊(jin)密(mi)封(feng)效果會好(hao)些,但過緊(jin)也(ye)是(shi)有害的。一是(shi)引起(qi)靜環(huan)密(mi)封(feng)因過度變形,影(ying)響密(mi)封(feng)效果;二是(shi)靜環(huan)材質以(yi)石(shi)墨居多,一般較(jiao)(jiao)脆,過度受力極易引起(qi)碎裂(lie);三是(shi)安(an)裝(zhuang)、拆卸困難,極易損(sun)壞靜環(huan)。
4、葉輪鎖母越緊越好。海寧泵用海寧機械密封泄(xie)漏(lou)(lou)中(zhong),軸(zhou)(zhou)(zhou)(zhou)套(tao)與軸(zhou)(zhou)(zhou)(zhou)之間(jian)(jian)(jian)(jian)(jian)(jian)的(de)泄(xie)漏(lou)(lou)(軸(zhou)(zhou)(zhou)(zhou)間(jian)(jian)(jian)(jian)(jian)(jian)泄(xie)漏(lou)(lou))是比較(jiao)常見的(de)。一般(ban)認為,軸(zhou)(zhou)(zhou)(zhou)間(jian)(jian)(jian)(jian)(jian)(jian)泄(xie)漏(lou)(lou)就是葉(xie)輪鎖(suo)母(mu)沒鎖(suo)緊,其實導致(zhi)(zhi)軸(zhou)(zhou)(zhou)(zhou)間(jian)(jian)(jian)(jian)(jian)(jian)泄(xie)漏(lou)(lou)的(de)因素較(jiao)多,如(ru)軸(zhou)(zhou)(zhou)(zhou)間(jian)(jian)(jian)(jian)(jian)(jian)墊(dian)失效,偏(pian)移,軸(zhou)(zhou)(zhou)(zhou)間(jian)(jian)(jian)(jian)(jian)(jian)內有(you)雜(za)質,軸(zhou)(zhou)(zhou)(zhou)與軸(zhou)(zhou)(zhou)(zhou)套(tao)配合處有(you)較(jiao)大(da)的(de)形位誤差,接觸(chu)面破(po)壞,軸(zhou)(zhou)(zhou)(zhou)上各部件間(jian)(jian)(jian)(jian)(jian)(jian)有(you)間(jian)(jian)(jian)(jian)(jian)(jian)隙,軸(zhou)(zhou)(zhou)(zhou)頭螺紋過(guo)長(chang)等(deng)都會導致(zhi)(zhi)軸(zhou)(zhou)(zhou)(zhou)間(jian)(jian)(jian)(jian)(jian)(jian)泄(xie)漏(lou)(lou)。鎖(suo)母(mu)鎖(suo)緊過(guo)度(du)只會導致(zhi)(zhi)軸(zhou)(zhou)(zhou)(zhou)間(jian)(jian)(jian)(jian)(jian)(jian)墊(dian)過(guo)早(zao)失效,相反適度(du)鎖(suo)緊鎖(suo)母(mu),使軸(zhou)(zhou)(zhou)(zhou)間(jian)(jian)(jian)(jian)(jian)(jian)墊(dian)始(shi)終保持一定的(de)壓縮彈性,在運(yun)轉中(zhong)鎖(suo)母(mu)會自動適時鎖(suo)緊,使軸(zhou)(zhou)(zhou)(zhou)間(jian)(jian)(jian)(jian)(jian)(jian)始(shi)終處于(yu)良好的(de)密(mi)封狀態(tai)。
5、新的比舊的好。相對而言,使用新海寧泵用海寧機械密封的效果好于舊的,但新海寧泵用海寧機械密封的質(zhi)(zhi)量或材質(zhi)(zhi)選擇(ze)不當時,配合尺寸誤差較(jiao)(jiao)大會影響密封效果;在(zai)聚合性(xing)和(he)滲透性(xing)介(jie)質(zhi)(zhi)中(zhong),靜(jing)環(huan)(huan)如無過(guo)度磨損(sun),還是(shi)不更換為(wei)(wei)(wei)好。因為(wei)(wei)(wei)靜(jing)環(huan)(huan)在(zai)靜(jing)環(huan)(huan)座中(zhong)長時間處于靜(jing)止狀態,使聚合物和(he)雜質(zhi)(zhi)沉積為(wei)(wei)(wei)一(yi)體,起(qi)到了較(jiao)(jiao)好的密封作用。
6、拆修總比不拆好。一旦出現海寧泵用海寧機械密封泄(xie)漏便(bian)急于拆修(xiu),其實(shi),有時(shi)密(mi)封(feng)并沒有損(sun)壞,只需調(diao)整工(gong)況(kuang)或適當調(diao)整密(mi)封(feng)就可消除泄(xie)漏。這樣既避免浪(lang)費又可以(yi)驗(yan)證(zheng)自己的故障(zhang)判斷能(neng)力,積累維修(xiu)經(jing)驗(yan)提高檢修(xiu)質量(liang)。