{一}、齒輪泵機械密封本身質量問題

齒(chi)輪泵機械密(mi)封(feng)的原(yuan)理是通(tong)過彈(dan)性(xing)元件和介質(zhi)壓力實現(xian)密(mi)封(feng)副之間(jian)的嚴密(mi)貼(tie)合，設備運轉時，隨軸(zhou)轉動(dong)(dong)(dong)的動(dong)(dong)(dong)環和密(mi)封(feng)殼體(ti)相(xiang)連的靜環產生相(xiang)對轉動(dong)(dong)(dong)，使(shi)密(mi)封(feng)面間(jian)形成穩定的液膜，從而(er)阻隔介質(zhi)外漏，達到端面密(mi)封(feng)效果。

(1)密封元件制造(zao)質(zhi)量存在問題

密(mi)封(feng)環(huan)硬度不足(zu)、石墨環(huan)燒結質(zhi)量(liang)不佳、彈(dan)性元件制(zhi)造質(zhi)量(liang)問(wen)題等。

(2)制造精度不足

齒輪油泵機(ji)械密封(feng)制(zhi)造，對密封(feng)端面(mian)的粗糙(cao)度(du)(du)和(he)平面(mian)度(du)(du)要求很高，是密封(feng)重(zhong)要的質量指標。要是密封(feng)面(mian)粗糙(cao)度(du)(du)和(he)平面(mian)度(du)(du)不達標就會嚴(yan)重(zhong)影(ying)響密封(feng)使(shi)用(yong)的穩定性(xing)；另外輔助(zhu)密封(feng)的制(zhi)造精度(du)(du)也(ye)很重(zhong)要，如(ru)：動環(huan)的輔助(zhu)密封(feng)圈過盈量太(tai)大(da)，會卡住動環(huan)，使(shi)其無(wu)(wu)法軸向運動補償而(er)泄(xie)漏，過盈量太(tai)小則無(wu)(wu)法起到靜密封(feng)的作用(yong)。

{二}、齒(chi)輪油泵機械密(mi)封泄漏(lou)點分析(xi)

機械(xie)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng)的(de)動(dong)(dong)環(huan)是(shi)由固(gu)定螺(luo)栓(shuan)、密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng)圈(quan)、傳動(dong)(dong)座和(he)(he)彈(dan)簧(huang)(huang)構成，安裝到傳動(dong)(dong)軸(zhou)(zhou)上實現(xian)與軸(zhou)(zhou)體(ti)的(de)共(gong)同運轉。靜環(huan)是(shi)由防旋轉固(gu)定螺(luo)栓(shuan)、密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng)圈(quan)構成，安裝在(zai)機封(feng)(feng)(feng)(feng)(feng)壓(ya)(ya)蓋(gai)部位，和(he)(he)齒輪(lun)油泵(beng)殼形(xing)成一個整體(ti)，處(chu)于靜止狀態。當機械(xie)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng)安裝完成之后，需(xu)要依靠內部的(de)工(gong)(gong)作(zuo)介質施加(jia)的(de)壓(ya)(ya)力，還有(you)動(dong)(dong)環(huan)彈(dan)簧(huang)(huang)提供的(de)彈(dan)簧(huang)(huang)力施加(jia)的(de)作(zuo)用(yong)力條件(jian)下，把動(dong)(dong)環(huan)實現(xian)與靜環(huan)的(de)緊密(mi)(mi)(mi)壓(ya)(ya)實。當齒輪(lun)油泵(beng)處(chu)于工(gong)(gong)作(zuo)狀太時，動(dong)(dong)、靜環(huan)相(xiang)互間(jian)是(shi)由工(gong)(gong)作(zuo)介質形(xing)成厚(hou)度很(hen)小的(de)液膜，從而保證機封(feng)(feng)(feng)(feng)(feng)不會出現(xian)泄漏，這就是(shi)機械(xie)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng)的(de)主密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng)。除此之外(wai)，軸(zhou)(zhou)套和(he)(he)動(dong)(dong)環(huan)、機封(feng)(feng)(feng)(feng)(feng)靜環(huan)和(he)(he)壓(ya)(ya)蓋(gai)、軸(zhou)(zhou)套和(he)(he)泵(beng)軸(zhou)(zhou)等(deng)相(xiang)互間(jian)的(de)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng)用(yong)O型密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng)圈(quan)實現(xian)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng)。

機(ji)(ji)械(xie)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)可能出現泄露的(de)部位有：(1)軸套和軸相互間的(de)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)點，是(shi)一種靜(jing)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)。(2)動、靜(jing)環(huan)接(jie)觸面部位的(de)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)為動密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)。(3)動環(huan)和軸套密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)為靜(jing)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)。(4)靜(jing)環(huan)和機(ji)(ji)械(xie)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)壓蓋(gai)間密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)，是(shi)一種靜(jing)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)。(5)機(ji)(ji)械(xie)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)壓蓋(gai)和齒輪油(you)泵(beng)體相互間的(de)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)點，為靜(jing)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)。