發布時間:
2013
-
11
-
29
來(lai)源(yuan):
185
當(dang)停(ting)(ting)(ting)(ting)止(zhi)運行旋(xuan)片(pian)式(shi)真空(kong)泵(beng)(beng)(beng)時(shi)(shi)，如果(guo)有(you)油(you)(you)(you)(you)(you)(you)(you)孔與(yu)泵(beng)(beng)(beng)腔相(xiang)通(tong)或排氣(qi)(qi)閥(fa)(fa)(fa)(fa)(fa)、軸(zhou)封(feng)(feng)、泵(beng)(beng)(beng)蓋(gai)平面、進(jin)氣(qi)(qi)管(guan)、氣(qi)(qi)鎮閥(fa)(fa)(fa)(fa)(fa)等密(mi)封(feng)(feng)不嚴,由于液(ye)位差的(de)(de)存(cun)在(zai)(zai)和重(zhong)力(li)作用(yong)(yong)以(yi)及泵(beng)(beng)(beng)腔處于真空(kong)狀態(tai)時(shi)(shi)油(you)(you)(you)(you)(you)(you)(you)箱與(yu)泵(beng)(beng)(beng)腔的(de)(de)壓(ya)(ya)差作用(yong)(yong),油(you)(you)(you)(you)(you)(you)(you)就會(hui)返(fan)入泵(beng)(beng)(beng)腔,油(you)(you)(you)(you)(you)(you)(you)量足(zu)夠大時(shi)(shi),油(you)(you)(you)(you)(you)(you)(you)還會(hui)返(fan)到(dao)(dao)進(jin)氣(qi)(qi)管(guan)道中(zhong),造成下(xia)次起動時(shi)(shi)阻力(li)大,旋(xuan)片(pian)和轉子受(shou)力(li)大,排氣(qi)(qi)閥(fa)(fa)(fa)(fa)(fa)受(shou)力(li)大,起動困難(nan),影(ying)響(xiang)零(ling)部(bu)件(jian)壽命,降(jiang)低(di)泵(beng)(beng)(beng)的(de)(de)可(ke)(ke)靠性。因此,應設(she)(she)法(fa)防(fang)止(zhi)停(ting)(ting)(ting)(ting)泵(beng)(beng)(beng)返(fan)油(you)(you)(you)(you)(you)(you)(you)。其(qi)(qi)原(yuan)理是(shi),在(zai)(zai)停(ting)(ting)(ting)(ting)泵(beng)(beng)(beng)時(shi)(shi)切斷(duan)油(you)(you)(you)(you)(you)(you)(you)路,消除泵(beng)(beng)(beng)腔負壓(ya)(ya),降(jiang)低(di)液(ye)位差,減(jian)(jian)少返(fan)入油(you)(you)(you)(you)(you)(you)(you)量。 常見的(de)(de)解(jie)決(jue)辦法(fa)有(you)：1、把排氣(qi)(qi)閥(fa)(fa)(fa)(fa)(fa)附近的(de)(de)油(you)(you)(you)(you)(you)(you)(you)與(yu)其(qi)(qi)余油(you)(you)(you)(you)(you)(you)(you)隔開(kai),油(you)(you)(you)(you)(you)(you)(you)位只(zhi)略高(gao)于隔墻。2、把油(you)(you)(you)(you)(you)(you)(you)箱和排氣(qi)(qi)閥(fa)(fa)(fa)(fa)(fa)移在(zai)(zai)側(ce)面,以(yi)降(jiang)低(di)油(you)(you)(you)(you)(you)(you)(you)位,減(jian)(jian)少油(you)(you)(you)(you)(you)(you)(you)量。3、閥(fa)(fa)(fa)(fa)(fa)座平面要(yao)(yao)平整,閥(fa)(fa)(fa)(fa)(fa)片(pian)加(jia)彈力(li)。 4、軸(zhou)封(feng)(feng)河靜密(mi)封(feng)(feng)部(bu)位要(yao)(yao)可(ke)(ke)靠,適時(shi)(shi)更換。 5、在(zai)(zai)油(you)(you)(you)(you)(you)(you)(you)孔中(zhong)加(jia)管(guan)子,使油(you)(you)(you)(you)(you)(you)(you)位僅略高(gao)于進(jin)油(you)(you)(you)(you)(you)(you)(you)口(kou)。 6、設(she)(she)置(zhi)止(zhi)回閥(fa)(fa)(fa)(fa)(fa)機(ji)構,停(ting)(ting)(ting)(ting)泵(beng)(beng)(beng)時(shi)(shi)自(zi)動關閉進(jin)油(you)(you)(you)(you)(you)(you)(you)孔。7、設(she)(she)置(zhi)油(you)(you)(you)(you)(you)(you)(you)泵(beng)(beng)(beng)和輔助機(ji)構,停(ting)(ting)(ting)(ting)泵(beng)(beng)(beng)時(shi)(shi)切斷(duan)油(you)(you)(you)(you)(you)(you)(you)路。 8、泵(beng)(beng)(beng)口(kou)裝(zhuang)充(chong)氣(qi)(qi)閥(fa)(fa)(fa)(fa)(fa)。9、裝(zhuang)入口(kou)容器(qi)。采用(yong)(yong)止(zhi)回閥(fa)(fa)(fa)(fa)(fa)和動密(mi)封(feng)(feng)、靜密(mi)封(feng)(feng)的(de)(de)結(jie)構，即使遇到(dao)(dao)突然停(ting)(ting)(ting)(ting)電(dian)而不向泵(beng)(beng)(beng)內(nei)充(chong)氣(qi)(qi)，也(ye)能在(zai)(zai)較長(chang)時(shi)(shi)間(jian)內(nei)使泵(beng)(beng)(beng)腔處于真空(kong)狀態(tai)，無(wu)顯著返(fan)油(you)(you)(you)(you)(you)(you)(you)。但其(qi)(qi)可(ke)(ke)靠性受(shou)制(zhi)造、裝(zhuang)配(pei)、油(you)(you)(you)(you)(you)(you)(you)封(feng)(feng)、排氣(qi)(qi)閥(fa)(fa)(fa)(fa)(fa)和其(qi)(qi)他(ta)靜密(mi)封(feng)(feng)件(jian)的(de)(de)質量狀況影(ying)響(xiang)。如果(guo)加(jia)裝(zhuang)一(yi)入口(kou)容器(qi)，那么(me)，即使發生返(fan)油(you)(you)(you)(you)(you)(you)(you)，也(ye)只(zhi)限(xian)(xian)到(dao)(dao)容器(qi)中(zhong)，則比(bi)較可(ke)(ke)靠。止(zhi)回閥(fa)(fa)(fa)(fa)(fa)有(you)節(jie)制(zhi)進(jin)油(you)(you)(you)(you)(you)(you)(you)量的(de)(de)作用(yong)(yong)。例如，每轉只(zhi)有(you)約四分之一(yi)的(de)(de)時(shi)(shi)間(jian)開(kai)啟油(you)(you)(you)(you)(you)(you)(you)孔。油(you)(you)(you)(you)(you)(you)(you)量過多(duo)噪(zao)聲(sheng)大些,由于油(you)(you)(you)(you)(you)(you)(you)中(zhong)含(han)氣(qi)(qi)，極限(xian)(xian)全壓(ya)(ya)力(li)也(ye)可(ke)(ke)能會(hui)有(you)所(suo)下(xia)降(jiang)。過小的(de)(de)油(you)(you)(you)(you)(you)(you)(you)孔加(jia)工較難(nan)，止(zhi)回閥(fa)(fa)(fa)(fa)(fa)可(ke)(ke)克服(fu)這一(yi)困難(nan)。另外，萬一(yi)止(zhi)回閥(fa)(fa)(fa)(fa)(fa)零(ling)件(jian)損壞(huai)，拆除止(zhi)回閥(fa)(fa)(fa)(fa)(fa)桿后泵(beng)(beng)(beng)仍可(ke)(ke)使用(yong)(yong)。但停(ting)(ting)(ting)(ting)泵(beng)(beng)(beng)后要(yao)(yao)立即向泵(beng)(beng)(beng)內(nei)充(chong)氣(qi)(qi)，以(yi)防(fang)返(fan)油(you)(you)(you)(you)(you)(you)(you)，故要(yao)(yao)適時(shi)(shi)檢修，對重(zhong)要(yao)(yao)用(yong)(yong)途(tu)，可(ke)(ke)加(jia)裝(zhuang)放氣(qi)(qi)閥(fa)(fa)(fa)(fa)(fa)或截(jie)止(zhi)帶(dai)放氣(qi)(qi)閥(fa)(fa)(fa)(fa)(fa)。用(yong)(yong)戶可(ke)(ke)根據不同的(de)(de)情(qing)況選擇相(xiang)應的(de)(de)解(jie)決(jue)辦法(fa)。 ...