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液壓油箱內(nèi)油位過低
若液壓油箱內(nèi)油量太少,將使液壓系統(tǒng)沒有足夠的流量帶走其產(chǎn)生的熱量,導(dǎo)致油溫升高。

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液壓系統(tǒng)中混入空氣
混入液壓油中的空氣,在低壓區(qū)時(shí)會從油中逸出并形成氣泡,當(dāng)其運(yùn)動到高壓區(qū)時(shí),這些氣泡將被高壓油擊碎,受到急
劇壓縮而放出大量的熱量,引起油溫升高。