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自力式電動閥振動故障怎么解決

人氣:0發表時間:2019/12/17 1:02:38

自力式電動閥振動故障的解決方法有以下幾種:

  1)改變節流件形狀,消除共振法

  因電動閥的所謂振源發生在高速流動、壓力急劇變化的節流口,改變節流件的形狀即可改變振源頻率,在共振不強烈時比較容易解決。

  2)避開振源波擊法

  外來振源波擊引起閥振動,這顯然是電動閥正常工作時所應避開的,如果產生這種振動,應當采取相應的措施 。

  3)增大導向尺寸,減小配合間隙法

  軸塞形閥一般導向尺寸都較小,所有閥配合間隙一般都較大,有0.4~lmm,這對產生機械振動是有幫助。因此,在發生輕微的機械振動時,可通過增大導向尺寸,減小配合間隙來削弱振動。

  4)增加剛度法

  對振蕩和輕微振動,可增大剛度來消除或減弱,如選用大剛度的彈簧,改用活塞執行機構等辦法都是可行的。

  5)減小汽蝕振動法

  對因空化汽泡破裂而產生的汽蝕振動,自然應在減小空化上想辦法。①讓氣泡破裂產生的沖擊能量不作用在固體表面上,特別是閥芯上,而是讓液體吸收。套筒閥就具有這個特點,因此可以將軸塞型閥芯改成套筒型。②采取減小空化的一切辦法,如增加節流阻力,增大縮流口壓力,分級或串聯減壓等。

  6)增加阻尼法

  增加阻尼即增加對振動的摩擦,如套筒閥的閥塞可采用“O”形圈密封,采用具有較大摩擦力的石墨填料等,這對消除或減弱輕微的振動還是有一定作用的。


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