今天,我(wo)(wo)們公司的(de)(de)小編向您(nin)介(jie)紹真(zhen)(zhen)空(kong)(kong)(kong)泵(beng)維修的(de)(de)真(zhen)(zhen)空(kong)(kong)(kong)度不(bu)穩定(ding)性。首(shou)先,我(wo)(wo)們來(lai)看看極(ji)限(xian)真(zhen)(zhen)空(kong)(kong)(kong)是什么。極(ji)限(xian)真(zhen)(zhen)空(kong)(kong)(kong)是指泵(beng)在(zai)穩定(ding)運(yun)行(xing)時(shi)可以(yi)達到的(de)(de)最小真(zhen)(zhen)空(kong)(kong)(kong)壓(ya)(ya)(ya)力(li)(li)。泵(beng)打開(kai)后(hou)不(bu)久,泵(beng)可以(yi)達到最低壓(ya)(ya)(ya)力(li)(li)范圍。在(zai)真(zhen)(zhen)空(kong)(kong)(kong)泵(beng)運(yun)行(xing)一段(duan)時(shi)間后(hou),泵(beng)溫度將升高并導致潤滑(hua)劑(ji)。飽和蒸氣壓(ya)(ya)(ya)和粘度變化等(deng)性能參(can)數和極(ji)限(xian)真(zhen)(zhen)空(kong)(kong)(kong)壓(ya)(ya)(ya)力(li)(li)都有一定(ding)的(de)(de)小波(bo)動,但經過一段(duan)時(shi)間的(de)(de)運(yun)行(xing)后(hou),其(qi)趨于穩定(ding)的(de)(de)真(zhen)(zhen)空(kong)(kong)(kong)壓(ya)(ya)(ya)力(li)(li)值(zhi)。這個穩定(ding)的(de)(de)值(zhi)是我(wo)(wo)們通常所說的(de)(de)真(zhen)(zhen)空(kong)(kong)(kong)泵(beng)的(de)(de)最終壓(ya)(ya)(ya)力(li)(li)。
真(zhen)空(kong)泵維(wei)修用真(zhen)空(kong)泵的(de)極(ji)限真(zhen)空(kong)不穩定性有哪(na)些影(ying)響(xiang)因素?
真空泵壓力的不穩(wen)定性(xing)有很多因素,例(li)如泵送時間(jian),潤滑油,泵本身的加工精度,泵部件之(zhi)間(jian)的間(jian)隙調(diao)整以及有害(hai)空間(jian)。
1.真空(kong)泵油對真空(kong)泵的影響
對于(yu)真(zhen)空(kong)(kong)泵(beng)油(you)的高度,即泵(beng)的循(xun)環油(you)量(liang)。旋片(pian)泵(beng)的循(xun)環油(you)量(liang)也大,密封效果越(yue)好(hao),極限(xian)壓力越(yue)低;但是(shi),由于(yu)真(zhen)空(kong)(kong)泵(beng)運行過程中旋片(pian)泵(beng)的真(zhen)空(kong)(kong)泵(beng)油(you)中的空(kong)(kong)氣(qi)和水蒸氣(qi)的釋放(fang)極限(xian)壓力,所(suo)以循(xun)環油(you)的量(liang)不盡可能大,應該(gai)有一個合(he)適的值。
其中(zhong),在(zai)理(li)想條(tiao)件下(油(you)(you)不釋放空氣和(he)水(shui)吞咽氣體),循環油(you)(you)量(liang)與極(ji)限壓(ya)力(li)(li)之間的(de)關(guan)系,即真空泵油(you)(you)越(yue)高,極(ji)限壓(ya)力(li)(li)越(yue)低;主要考慮的(de)是在(zai)真空泵油(you)(you)和(he)極(ji)限壓(ya)力(li)(li)下釋放空氣和(he)水(shui)蒸氣。隨著循環油(you)(you)量(liang)的(de)增加,這種關(guan)系越(yue)來越(yue)高。當(dang)油(you)(you)量(liang)達到(dao)一定值時,極(ji)限壓(ya)力(li)(li)最低,然后(hou)隨著油(you)(you)量(liang)的(de)增加而增加。
隨著真空泵(beng)油(you)(you)的上升,油(you)(you)的飽和蒸氣壓(ya)也(ye)增(zeng)加(jia)(jia),揮發的氣態油(you)(you)也(ye)增(zeng)加(jia)(jia),這大大增(zeng)加(jia)(jia)了旋(xuan)片泵(beng)的極限壓(ya)力(li),因(yin)此應盡可能降低油(you)(you)的溫度。減少旋(xuan)片泵(beng)的極限壓(ya)力(li)。目前使用的方法(fa)主要(yao)包括(kuo)泵(beng)油(you)(you)的水冷(leng)或空氣冷(leng)卻(que),以及散(san)熱(re)器的增(zeng)加(jia)(jia)。
2.間隙(xi)對真空泵極限壓力(li)的(de)影(ying)響
真(zhen)空(kong)(kong)泵(beng)(beng)(beng)的(de)間(jian)(jian)隙是(shi)指頂點間(jian)(jian)隙和截面間(jian)(jian)隙。間(jian)(jian)隙對真(zhen)空(kong)(kong)泵(beng)(beng)(beng)的(de)極限(xian)壓(ya)力有(you)很(hen)大影響(xiang)。間(jian)(jian)隙的(de)存在是(shi)不可避免的(de),這(zhe)(zhe)與真(zhen)空(kong)(kong)泵(beng)(beng)(beng)生產過程中的(de)加工(gong)精(jing)度和裝配精(jing)度有(you)關,也是(shi)功能(neng)設計的(de)需(xu)要。如果(guo)間(jian)(jian)隙太大,真(zhen)空(kong)(kong)泵(beng)(beng)(beng)的(de)高壓(ya)室(shi)(shi)中的(de)氣體將泄漏到低(di)壓(ya)室(shi)(shi),這(zhe)(zhe)將嚴重影響(xiang)真(zhen)空(kong)(kong)泵(beng)(beng)(beng)的(de)極限(xian)壓(ya)力。雖然(ran)小間(jian)(jian)隙會降低(di)真(zhen)空(kong)(kong)泵(beng)(beng)(beng)的(de)極限(xian)壓(ya)力,但會導(dao)致(zhi)摩(mo)擦力增加,從而導(dao)致(zhi)動(dong)力,磨損(sun)和散熱。系列問題。因(yin)此,確定合(he)理(li)的(de)差距非常重要。間(jian)(jian)隙的(de)值(zhi)(zhi)不是(shi)盡可能(neng)小。在正常情況下,除了(le)考慮潤滑和泄漏外,間(jian)(jian)隙的(de)值(zhi)(zhi)還(huan)應考慮熱膨(peng)脹的(de)原因(yin)。
3,有害空間對真空泵極限壓力的影響
有害空(kong)(kong)(kong)間(jian)的存在(zai)(zai)也增加了(le)真空(kong)(kong)(kong)泵(beng)的最終(zhong)壓(ya)(ya)力。有害空(kong)(kong)(kong)間(jian)是(shi)指轉(zhuan)(zhuan)子(zi)的接觸(chu)點(dian)與定子(zi)腔的末端處(chu)(chu)的真空(kong)(kong)(kong)泵(beng)的定子(zi)與排(pai)氣(qi)(qi)口之間(jian)的空(kong)(kong)(kong)間(jian),并(bing)且該空(kong)(kong)(kong)間(jian)中(zhong)的氣(qi)(qi)體難以(yi)從排(pai)氣(qi)(qi)口處(chu)(chu)排(pai)出。周期結束。在(zai)(zai)旋片旋轉(zhuan)(zhuan)的壓(ya)(ya)縮(suo)下,它(ta)從接觸(chu)點(dian)的間(jian)隙溢出,從頂點(dian)溢出的氣(qi)(qi)體進入吸(xi)入室(shi),從而提高了(le)真空(kong)(kong)(kong)泵(beng)的極限壓(ya)(ya)力。這(zhe)可以(yi)通(tong)過用(yong)油填充危險(xian)區域(yu)或(huo)在(zai)(zai)空(kong)(kong)(kong)間(jian)的側板上引(yin)入氣(qi)(qi)體通(tong)道(用(yong)于自(zi)潤滑干式泵(beng))來解(jie)決。