R900472158 4WMM6C5X/F力士樂手動換向閥

R900472158 4WMM6C5X/F力士樂手動換向閥

武漢百士自動化設備有限公司專注于液壓、氣動、工控自動化備件銷售，熱誠歡迎新老客戶咨詢購買！

換向閥是具有兩種以上流動形式和兩個以上油口的方向控制閥。是實現液壓油流的溝通、切斷和換向，以及壓力卸載和順序動作控制的閥門。
雙向換向閥
可分為手動換向閥、電磁換向閥、電液換向閥等。
又稱克里斯閥，閥門的一種，具有多向可調的通道，可適時改變流體流向。
工作時借著閥外的驅動傳動機構轉動驅動軸，帶動搖拐臂，啟動閥板，使工作流體時而從左入口通向閥的下部出口，時而從右入口變換通向下部出口，實現了周期變換流向的目的。
這種變換閥在石油、化工生產中有著應用，在合成氨造氣系統中為常用。此外，換向閥還可作成閥瓣式的結構，多用于較小流量的場合。工作時只需轉動手輪通過閥瓣來變換工作流體的流向。
2工作原理
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，實現了不停車換向。

六通換向閥
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，縮短了生產周期，降低了成本。密封面堆焊不銹鋼，防銹耐腐蝕，密封面經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、調整塊、調節螺釘、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、性能穩定、密封良好和使用壽命長的特點。在凸輪的作用下，密封圈的球面與閥體密封面相接觸產生擠壓彈性變形，達到密封效果。調整塊和調節螺釘在兩組密封組件不能同步到位時可起調整作用，確保各通道密封性能同步到位。
密封組件
1夾板 2螺栓 3調整塊 4閥瓣 5密封圈 6調整螺釘
(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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