發布時間:
2013
-
11
-
29
來源(yuan):
184
當停(ting)(ting)(ting)止(zhi)運行旋(xuan)片式真空(kong)泵(beng)(beng)(beng)時(shi)(shi)，如(ru)果(guo)有油(you)(you)(you)(you)孔(kong)(kong)與泵(beng)(beng)(beng)腔(qiang)相(xiang)通(tong)或(huo)排(pai)(pai)氣(qi)閥(fa)、軸封(feng)(feng)(feng)、泵(beng)(beng)(beng)蓋(gai)平面、進(jin)氣(qi)管、氣(qi)鎮閥(fa)等密封(feng)(feng)(feng)不嚴,由于(yu)液位(wei)差(cha)的(de)(de)(de)(de)存在(zai)和(he)重力作用以(yi)及泵(beng)(beng)(beng)腔(qiang)處于(yu)真空(kong)狀(zhuang)態(tai)時(shi)(shi)油(you)(you)(you)(you)箱(xiang)與泵(beng)(beng)(beng)腔(qiang)的(de)(de)(de)(de)壓(ya)(ya)差(cha)作用,油(you)(you)(you)(you)就會返入(ru)(ru)泵(beng)(beng)(beng)腔(qiang),油(you)(you)(you)(you)量(liang)足夠大時(shi)(shi),油(you)(you)(you)(you)還會返到進(jin)氣(qi)管道中(zhong),造(zao)成下次(ci)起(qi)動(dong)時(shi)(shi)阻(zu)力大,旋(xuan)片和(he)轉子受(shou)力大,排(pai)(pai)氣(qi)閥(fa)受(shou)力大,起(qi)動(dong)困難,影(ying)(ying)響零部件壽命(ming),降(jiang)低泵(beng)(beng)(beng)的(de)(de)(de)(de)可(ke)(ke)(ke)靠性。因此,應(ying)設法(fa)防止(zhi)停(ting)(ting)(ting)泵(beng)(beng)(beng)返油(you)(you)(you)(you)。其(qi)原理是,在(zai)停(ting)(ting)(ting)泵(beng)(beng)(beng)時(shi)(shi)切斷(duan)油(you)(you)(you)(you)路(lu),消除(chu)泵(beng)(beng)(beng)腔(qiang)負(fu)壓(ya)(ya),降(jiang)低液位(wei)差(cha),減少返入(ru)(ru)油(you)(you)(you)(you)量(liang)。 常見的(de)(de)(de)(de)解決(jue)(jue)辦(ban)法(fa)有：1、把排(pai)(pai)氣(qi)閥(fa)附近的(de)(de)(de)(de)油(you)(you)(you)(you)與其(qi)余油(you)(you)(you)(you)隔(ge)開,油(you)(you)(you)(you)位(wei)只略(lve)高于(yu)隔(ge)墻。2、把油(you)(you)(you)(you)箱(xiang)和(he)排(pai)(pai)氣(qi)閥(fa)移在(zai)側面,以(yi)降(jiang)低油(you)(you)(you)(you)位(wei),減少油(you)(you)(you)(you)量(liang)。3、閥(fa)座平面要(yao)(yao)平整(zheng),閥(fa)片加(jia)彈力。 4、軸封(feng)(feng)(feng)河靜(jing)(jing)密封(feng)(feng)(feng)部位(wei)要(yao)(yao)可(ke)(ke)(ke)靠,適時(shi)(shi)更換(huan)。 5、在(zai)油(you)(you)(you)(you)孔(kong)(kong)中(zhong)加(jia)管子,使(shi)油(you)(you)(you)(you)位(wei)僅略(lve)高于(yu)進(jin)油(you)(you)(you)(you)口。 6、設置止(zhi)回(hui)(hui)閥(fa)機構,停(ting)(ting)(ting)泵(beng)(beng)(beng)時(shi)(shi)自(zi)動(dong)關閉(bi)進(jin)油(you)(you)(you)(you)孔(kong)(kong)。7、設置油(you)(you)(you)(you)泵(beng)(beng)(beng)和(he)輔助機構,停(ting)(ting)(ting)泵(beng)(beng)(beng)時(shi)(shi)切斷(duan)油(you)(you)(you)(you)路(lu)。 8、泵(beng)(beng)(beng)口裝充(chong)氣(qi)閥(fa)。9、裝入(ru)(ru)口容(rong)(rong)器。采(cai)用止(zhi)回(hui)(hui)閥(fa)和(he)動(dong)密封(feng)(feng)(feng)、靜(jing)(jing)密封(feng)(feng)(feng)的(de)(de)(de)(de)結構，即(ji)(ji)使(shi)遇到突然停(ting)(ting)(ting)電而(er)不向泵(beng)(beng)(beng)內充(chong)氣(qi)，也(ye)(ye)能(neng)在(zai)較長時(shi)(shi)間(jian)內使(shi)泵(beng)(beng)(beng)腔(qiang)處于(yu)真空(kong)狀(zhuang)態(tai)，無顯著(zhu)返油(you)(you)(you)(you)。但其(qi)可(ke)(ke)(ke)靠性受(shou)制(zhi)造(zao)、裝配、油(you)(you)(you)(you)封(feng)(feng)(feng)、排(pai)(pai)氣(qi)閥(fa)和(he)其(qi)他靜(jing)(jing)密封(feng)(feng)(feng)件的(de)(de)(de)(de)質(zhi)量(liang)狀(zhuang)況(kuang)影(ying)(ying)響。如(ru)果(guo)加(jia)裝一(yi)入(ru)(ru)口容(rong)(rong)器，那么，即(ji)(ji)使(shi)發生返油(you)(you)(you)(you)，也(ye)(ye)只限(xian)到容(rong)(rong)器中(zhong)，則比較可(ke)(ke)(ke)靠。止(zhi)回(hui)(hui)閥(fa)有節制(zhi)進(jin)油(you)(you)(you)(you)量(liang)的(de)(de)(de)(de)作用。例如(ru)，每轉只有約四分之一(yi)的(de)(de)(de)(de)時(shi)(shi)間(jian)開啟(qi)油(you)(you)(you)(you)孔(kong)(kong)。油(you)(you)(you)(you)量(liang)過多噪(zao)聲大些,由于(yu)油(you)(you)(you)(you)中(zhong)含氣(qi)，極(ji)限(xian)全壓(ya)(ya)力也(ye)(ye)可(ke)(ke)(ke)能(neng)會有所下降(jiang)。過小的(de)(de)(de)(de)油(you)(you)(you)(you)孔(kong)(kong)加(jia)工(gong)較難，止(zhi)回(hui)(hui)閥(fa)可(ke)(ke)(ke)克服這一(yi)困難。另外，萬一(yi)止(zhi)回(hui)(hui)閥(fa)零件損壞，拆除(chu)止(zhi)回(hui)(hui)閥(fa)桿后泵(beng)(beng)(beng)仍可(ke)(ke)(ke)使(shi)用。但停(ting)(ting)(ting)泵(beng)(beng)(beng)后要(yao)(yao)立(li)即(ji)(ji)向泵(beng)(beng)(beng)內充(chong)氣(qi)，以(yi)防返油(you)(you)(you)(you)，故要(yao)(yao)適時(shi)(shi)檢修，對重要(yao)(yao)用途，可(ke)(ke)(ke)加(jia)裝放(fang)氣(qi)閥(fa)或(huo)截止(zhi)帶(dai)放(fang)氣(qi)閥(fa)。用戶(hu)可(ke)(ke)(ke)根據不同(tong)的(de)(de)(de)(de)情況(kuang)選擇相(xiang)應(ying)的(de)(de)(de)(de)解決(jue)(jue)辦(ban)法(fa)。 ...