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淄川機械密封的基本元件分別扮演了什么角色

發布時間:2021-12-20 14:58:59 人氣:100268 來源:

  淄川機械密封是一種依(yi)靠(kao)彈(dan)性(xing)元件對動、靜環(huan)(huan)端面密(mi)(mi)(mi)封副(fu)的(de)(de)(de)預(yu)緊(jin)和介質壓力與(yu)彈(dan)性(xing)元件壓力的(de)(de)(de)壓緊(jin)而(er)達到(dao)密(mi)(mi)(mi)封的(de)(de)(de)軸向端面密(mi)(mi)(mi)封裝置。動環(huan)(huan)和靜環(huan)(huan)的(de)(de)(de)端面組成一對摩擦副(fu),動環(huan)(huan)靠(kao)密(mi)(mi)(mi)封室中液體的(de)(de)(de)壓力使其端面壓緊(jin)在(zai)靜環(huan)(huan)端面上,并(bing)在(zai)兩環(huan)(huan)端面上產生適當的(de)(de)(de)比壓和保持一層極薄的(de)(de)(de)液體膜而(er)達到(dao)密(mi)(mi)(mi)封的(de)(de)(de)目的(de)(de)(de)。


  常用淄川機械密封結構由(you)靜止(zhi)(zhi)環(huan)(huan)(huan)(huan)(靜環(huan)(huan)(huan)(huan))、旋轉(zhuan)環(huan)(huan)(huan)(huan)(動(dong)環(huan)(huan)(huan)(huan))、彈性元(yuan)件、彈簧座、固緊件、旋轉(zhuan)環(huan)(huan)(huan)(huan)輔助密(mi)封圈(quan)和靜止(zhi)(zhi)環(huan)(huan)(huan)(huan)輔助密(mi)封圈(quan)等元(yuan)件組(zu)成,防轉(zhuan)銷固定(ding)在壓蓋(gai)上(shang)以防止(zhi)(zhi)靜止(zhi)(zhi)環(huan)(huan)(huan)(huan)轉(zhuan)動(dong)。這些元(yuan)件都有哪些作用呢?


  (1)動(dong)、靜(jing)(jing)環:保持緊密貼合組成密封面(mian)防止(zhi)介質(zhi)泄漏。要求動(dong)、靜(jing)(jing)環具有(you)(you)良好的耐磨性動(dong)環可以軸向移(yi)動(dong),自動(dong)補(bu)償密封面(mian)磨損,使之與靜(jing)(jing)環良好地貼合,靜(jing)(jing)環有(you)(you)浮動(dong)性,起緩(huan)沖作用(yong)。


  (2)彈性元件(彈簧、波紋板、蛇形套等):主要作用是對密封端面產生一定的預緊壓力,使端面在啟動、停車和介質壓力波動時能保持良好的接合。同時用來克服輔助密封圈與軸之間的摩擦力,使補償環沿軸向移動,以補償端面磨損后形成的間隙。此外,還可對軸的跳動等引起的振動起一定的緩沖作用。用的彈性元件有圓柱螺旋壓縮彈簧、波形片彈簧、蝶形彈簧和波紋管。其中圓柱螺旋壓縮彈簧使用廣。波形彈簧和蝶形彈簧具有軸向尺寸小,剛度大,結構緊湊的優點,但軸向位移和彈簧力較小,一般適用于軸向尺寸要求很緊湊的輕型淄川機械密封。波(bo)形管常用(yong)于高溫(wen)、低溫(wen)、強腐蝕等特殊(shu)條件。

1.JPG

  (3)輔助(zhu)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(0形(xing)環(huan)(huan)、V形(xing)環(huan)(huan)、楔形(xing)環(huan)(huan)及(ji)其(qi)他(ta)異形(xing)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)環(huan)(huan)):主(zhu)要起(qi)到(dao)靜環(huan)(huan)和動環(huan)(huan)的(de)(de)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)作用,同時也(ye)起(qi)到(dao)浮動性和緩沖的(de)(de)作用。要求靜環(huan)(huan)的(de)(de)輔助(zhu)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)元件保證靜環(huan)(huan)與(yu)壓蓋之間的(de)(de)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)性,使靜環(huan)(huan)有一(yi)定的(de)(de)浮動性,動環(huan)(huan)的(de)(de)輔助(zhu)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)元件保證動環(huan)(huan)與(yu)軸或軸套之間的(de)(de)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng).材料要求耐熱、耐寒方(fang)面與(yu)介質接近。


  (4)傳(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)件:傳(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)件包(bao)括傳(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)銷、傳(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)環、傳(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)座、傳(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)套、傳(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)鍵(jian)、傳(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)突耳或(huo)牙嵌式聯接器(qi),其作用(yong)是(shi)將軸的轉矩傳(chuan)(chuan)(chuan)(chuan)(chuan)給動(dong)(dong)(dong)(dong)(dong)環,材(cai)料(liao)要求耐腐(fu)蝕和耐磨損。


  (5)固(gu)(gu)緊件:包括緊定螺釘、彈簧(huang)座、壓蓋(gai)、組裝套、軸(zhou)套。起著靜、動(dong)環的定位、固(gu)(gu)緊作用(yong)。要(yao)求定位正確,保(bao)(bao)證(zheng)摩擦副密(mi)(mi)封(feng)面處(chu)于(yu)正確的位置,并且保(bao)(bao)持良好貼(tie)合的彈簧(huang)比壓,同時(shi)要(yao)求拆裝方(fang)便,容易就位,能重復(fu)(fu)使用(yong),與輔助(zhu)密(mi)(mi)封(feng)配合處(chu)應注意(yi)安裝密(mi)(mi)封(feng)環的倒角(jiao)和(he)壓彈量,特別(bie)注意(yi)動(dong)環密(mi)(mi)封(feng)圈(quan)與軸(zhou)套配合處(chu)要(yao)求耐(nai)腐蝕和(he)耐(nai)磨損,必要(yao)時(shi)采(cai)用(yong)硬(ying)面復(fu)(fu)層。


  介紹完了淄川機械密封的基本元件,接下來看看密封失效都會發生在哪些元件處。淄川機械密封的泄漏點基本上都表現在(zai)6處(chu)(chu):①動、靜環(huan)端(duan)面處(chu)(chu);②靜環(huan)與(yu)(yu)(yu)靜環(huan)盒的輔助密(mi)封處(chu)(chu);③靜環(huan)壓蓋(gai)與(yu)(yu)(yu)離心(xin)泵(beng)泵(beng)體之間的密(mi)封處(chu)(chu);④動環(huan)鑲嵌結構配合處(chu)(chu);⑤軸套與(yu)(yu)(yu)泵(beng)軸之間的密(mi)封處(chu)(chu);⑥動環(huan)與(yu)(yu)(yu)軸套的輔助密(mi)封處(chu)(chu)。


  注意:⑤和⑥只有在安裝(zhuang)軸套時(shi)才存在。