如果普通旋片真(zhen)(zhen)(zhen)空(kong)(kong)泵的(de)轉(zhuan)子反(fan)轉(zhuan),真(zhen)(zhen)(zhen)空(kong)(kong)泵的(de)油和空(kong)(kong)氣將返(fan)回(hui)真(zhen)(zhen)(zhen)空(kong)(kong)室,造成污染并破壞現有的(de)真(zhen)(zhen)(zhen)空(kong)(kong)度。因此,在實際應用中有必要(yao)防止旋片真(zhen)(zhen)(zhen)空(kong)(kong)泵反(fan)轉(zhuan)。一(yi)般如何防止旋片真(zhen)(zhen)(zhen)空(kong)(kong)泵反(fan)轉(zhuan)?與螺(luo)桿真(zhen)(zhen)(zhen)空(kong)(kong)泵制造商(shang)一(yi)起了解它。
如(ru)果旋片(pian)真空泵反轉,它通常出(chu)現(xian)在泵的(de)啟動和(he)停止階段。
旋片真空泵通常(chang)由三(san)相(xiang)交流電機(ji)驅動(dong),因此首先要注意電源(yuan)線(xian)(xian)的連接,以保證正確(que)的旋(xuan)轉方向。目前,一些泵還配備了反向制(zhi)動(dong),以防(fang)止泵反向旋(xuan)轉。一旦電源(yuan)線(xian)(xian)連接不正確(que),真(zhen)空泵就無法啟動(dong)。
當(dang)泵(beng)(beng)停止(zhi)時,出口處的(de)(de)大(da)(da)氣壓(ya)(ya)(ya)力將(jiang)使真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)反轉。因(yin)此,有必要通(tong)(tong)過(guo)一個特(te)殊的(de)(de)閥(fa)(fa)門(men)將(jiang)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)與真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)室分開(kai),以防(fang)止(zhi)反向旋轉導致空(kong)(kong)氣和(he)泵(beng)(beng)油進入(ru)流入(ru)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)室。這種特(te)殊的(de)(de)閥(fa)(fa)門(men)通(tong)(tong)常是一種電(dian)(dian)磁放氣閥(fa)(fa),它通(tong)(tong)常與電(dian)(dian)機的(de)(de)電(dian)(dian)源相連,并安裝(zhuang)在(zai)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)的(de)(de)入(ru)口管中。當(dang)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)斷電(dian)(dian)或控(kong)制開(kai)關(guan)(guan)關(guan)(guan)閉(bi)時,電(dian)(dian)磁閥(fa)(fa)將(jiang)打開(kai),通(tong)(tong)過(guo)大(da)(da)氣和(he)泵(beng)(beng)入(ru)口之(zhi)間(jian)的(de)(de)壓(ya)(ya)(ya)差(cha)關(guan)(guan)閉(bi)泵(beng)(beng)和(he)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)室之(zhi)間(jian)的(de)(de)通(tong)(tong)道,并將(jiang)空(kong)(kong)氣排(pai)放到真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)入(ru)口。真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)啟動(dong)時,電(dian)(dian)磁閥(fa)(fa)關(guan)(guan)閉(bi),真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)排(pai)空(kong)(kong)保護閥(fa)(fa),閥(fa)(fa)板被彈簧壓(ya)(ya)(ya)力打開(kai)。
此外(wai),一些旋片真空泵(beng)還將在泵(beng)的進口處安裝一個(ge)空氣(qi)(qi)隔離閥來代替電磁放(fang)氣(qi)(qi)閥,以實現上(shang)述保護閥的功能。