VICKERS齒輪泵
困油現(xiàn)象
原因：液壓油在漸開(kāi)線齒輪泵運(yùn)轉(zhuǎn)過(guò)程中,，因齒輪相交處的封閉體積隨時(shí)間改變,，常有一部分的液壓油被密封在齒間，如圖所示,，稱為困油現(xiàn)象,，因液壓油不可壓縮將使外接齒輪產(chǎn)生極大的振動(dòng)和噪聲，影響系統(tǒng)正常工作,。
措施：在前后蓋板或浮動(dòng)軸套上開(kāi)卸荷槽,，開(kāi)設(shè)卸荷槽的原則：兩槽間距為zui小閉死容積，而使閉死容積由大變小時(shí)與壓油腔相通,，閉死容積由小變大時(shí)與吸油腔相通,。
泄漏現(xiàn)象
齒輪泵的泄漏較大，外嚙合齒輪運(yùn)轉(zhuǎn)時(shí)泄漏途徑有以下三點(diǎn)：一為齒輪頂隙,，其次為測(cè)隙,，第三為嚙合間隙。
其中端面?zhèn)认缎孤┹^大,，占總泄漏量的80%-85%,，當(dāng)壓力增加時(shí)，前者不會(huì)改變,，但后者撓度大增,，此為外嚙合齒輪泵泄漏zui主要的原因，容積效率較低,，故不適合用作高壓泵,。
解決方法：端面間隙補(bǔ)償采用靜壓平衡措施，在齒輪和蓋板之間增加一個(gè)補(bǔ)償零件,，如浮動(dòng)軸套,、浮動(dòng)側(cè)板。
VICKERS齒輪泵：部分現(xiàn)貨
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