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發布時間:2021-05-18 16:38:54 人氣:231929 來源:
汶上泵用汶上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,在汶上泵用汶上機械密封檢查(cha)時需要注意什么呢?
1、彈(dan)簧(huang)(huang)壓(ya)縮(suo)量(liang)越(yue)大密(mi)(mi)封效(xiao)(xiao)果越(yue)好。其實(shi)不然,彈(dan)簧(huang)(huang)壓(ya)縮(suo)量(liang)過(guo)大,可(ke)導致摩擦(ca)副急(ji)劇磨(mo)損(sun),瞬(shun)間燒損(sun);過(guo)度的壓(ya)縮(suo)使彈(dan)簧(huang)(huang)失去調節動環端面的能力,導致密(mi)(mi)封失效(xiao)(xiao)。
2、動(dong)環(huan)密(mi)封(feng)圖越緊越好。其實動(dong)環(huan)密(mi)封(feng)圈過(guo)緊有害無益。一是加(jia)劇密(mi)封(feng)圈與軸(zhou)套間(jian)的磨(mo)損(sun),過(guo)早泄漏(lou);二是增(zeng)大(da)了動(dong)環(huan)軸(zhou)向調整、移動(dong)的阻力(li),在工況變化頻繁時(shi)無法適(shi)時(shi)進行調整;三是彈簧過(guo)度(du)疲勞易損(sun)壞;四(si)是使(shi)動(dong)環(huan)密(mi)封(feng)圈變形(xing),影響(xiang)密(mi)封(feng)效果。
3、靜(jing)環(huan)密(mi)封(feng)(feng)圈越緊(jin)(jin)越好。靜(jing)環(huan)密(mi)封(feng)(feng)圈基(ji)本處(chu)于(yu)靜(jing)止狀態(tai),相(xiang)對較緊(jin)(jin)密(mi)封(feng)(feng)效果(guo)會(hui)好些,但過(guo)(guo)緊(jin)(jin)也是有害的。一是引起(qi)靜(jing)環(huan)密(mi)封(feng)(feng)因過(guo)(guo)度變形(xing),影(ying)響密(mi)封(feng)(feng)效果(guo);二是靜(jing)環(huan)材質以(yi)石墨居多,一般較脆,過(guo)(guo)度受(shou)力極(ji)易引起(qi)碎裂;三是安裝、拆卸困難,極(ji)易損壞靜(jing)環(huan)。
4、葉輪鎖母越緊越好。汶上泵用汶上機械密封泄(xie)(xie)(xie)漏中,軸套與軸之間(jian)(jian)(jian)(jian)(jian)(jian)的泄(xie)(xie)(xie)漏(軸間(jian)(jian)(jian)(jian)(jian)(jian)泄(xie)(xie)(xie)漏)是比較常見的。一般認為,軸間(jian)(jian)(jian)(jian)(jian)(jian)泄(xie)(xie)(xie)漏就是葉輪鎖(suo)母(mu)沒鎖(suo)緊(jin)(jin)(jin),其實導致軸間(jian)(jian)(jian)(jian)(jian)(jian)泄(xie)(xie)(xie)漏的因素較多(duo),如軸間(jian)(jian)(jian)(jian)(jian)(jian)墊(dian)(dian)失(shi)效,偏移,軸間(jian)(jian)(jian)(jian)(jian)(jian)內(nei)有雜質,軸與軸套配合(he)處(chu)有較大的形位誤差(cha),接觸面破壞,軸上各部件間(jian)(jian)(jian)(jian)(jian)(jian)有間(jian)(jian)(jian)(jian)(jian)(jian)隙,軸頭螺紋過長(chang)等都會導致軸間(jian)(jian)(jian)(jian)(jian)(jian)泄(xie)(xie)(xie)漏。鎖(suo)母(mu)鎖(suo)緊(jin)(jin)(jin)過度只會導致軸間(jian)(jian)(jian)(jian)(jian)(jian)墊(dian)(dian)過早失(shi)效,相反適(shi)度鎖(suo)緊(jin)(jin)(jin)鎖(suo)母(mu),使(shi)軸間(jian)(jian)(jian)(jian)(jian)(jian)墊(dian)(dian)始(shi)終保持(chi)一定的壓縮(suo)彈性(xing),在運(yun)轉中鎖(suo)母(mu)會自動適(shi)時鎖(suo)緊(jin)(jin)(jin),使(shi)軸間(jian)(jian)(jian)(jian)(jian)(jian)始(shi)終處(chu)于(yu)良好的密封狀態(tai)。
5、新的比舊的好。相對而言,使用新汶上泵用汶上機械密封的效果好于舊的,但新汶上泵用汶上機械密封的質(zhi)量或材質(zhi)選擇不當時(shi),配合(he)尺寸誤差較大(da)會影響密(mi)封(feng)效果;在聚合(he)性和滲透性介(jie)質(zhi)中(zhong),靜(jing)環如無過(guo)度(du)磨損(sun),還(huan)是不更換為(wei)(wei)好(hao)。因為(wei)(wei)靜(jing)環在靜(jing)環座中(zhong)長時(shi)間處于靜(jing)止狀態,使聚合(he)物和雜質(zhi)沉積為(wei)(wei)一(yi)體,起到了較好(hao)的密(mi)封(feng)作(zuo)用。
6、拆修總比不拆好。一旦出現汶上泵用汶上機械密封泄漏(lou)便急(ji)于拆(chai)修,其實,有時(shi)密封并沒有損壞(huai),只需調整工況或適當調整密封就(jiu)可消除泄漏(lou)。這(zhe)樣既避(bi)免浪(lang)費又(you)可以驗證自己(ji)的故障判斷能力(li),積累(lei)維修經驗提高(gao)檢(jian)修質量(liang)。