王亞波
REXROTH電磁比例閥0811106033
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六通換向閥主要由閥體、密封組件、凸輪、閥桿、手柄和閥蓋等零部件組成(圖1)。閥門由手柄驅動,通過手柄帶動閥桿與凸輪旋轉,凸輪具有定位驅動與鎖定密封組件的開啟與關閉功能。手柄逆時針旋轉,兩組密封組件分別在凸輪的作用下關閉下端的兩個通道,上端的兩個通道分別與管道裝置的進口相通。反之,上端的兩個通道關閉,下端兩個通道與管道裝置的進口相通,實現(xiàn)了不停車換向。
1上閥蓋 2手柄 3閥桿 4凸輪 5密封組件 6閥蓋 7閥體
(1)六通閥的閥體由隔板分成兩腔,每腔都有3個通道,中間為進油口,兩端為出油口。閥體為碳鋼板焊結構,體積小,質量輕,結構緊湊,提高了材料的利用率,縮短了周期,降低了成本。密封面堆焊不銹鋼,防銹耐腐蝕,密封面經(jīng)過精加工后拋光研磨,表面粗糙度Ra≤0.8μm。
(2)六通閥有兩組密封組件。每組密封組件(圖2)由閥瓣、密封圈、調(diào)整塊、調(diào)節(jié)螺釘、夾板和螺栓組成。閥瓣為碳鋼板焊件,設有加強筋,即增加閥瓣強度又起導向作用,保證每組閥瓣間的同軸度。閥瓣上鑲嵌聚氨脂橡膠圈,該材料具有耐油、耐磨損、穩(wěn)定、密封良好和壽命長的特點。在凸輪的作用下,密封圈的球面與閥體密封面相接觸產(chǎn)生擠壓彈性變形,達到密封。調(diào)整塊和調(diào)節(jié)螺釘在兩組密封組件不能同步到位時可起調(diào)整作用,確保各通道密封同步到位。
密封組件
密封組件
1夾板 2螺栓 3調(diào)整塊 4閥瓣 5密封圈 6調(diào)整螺釘
(3)閥桿與閥體隔板和上閥蓋間的軸向密封采用O形圈。
(4)閥體隔板及上閥蓋軸孔部位鑲有銅套,可減小與O形圈間的摩擦力矩,密封組件開啟與關閉靈活,操作力矩小。
(5)上閥蓋設有指示牌及限位螺釘,閥桿上安裝指針,明確指示各通道的接通狀況,易于操作。
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REXROTH電磁比例閥0811106033