上海弘佩液壓設備有限公司是一家從事經營國外進口液壓氣動備件、自動化儀表的貿易公司；專注于工業傳動自動化流體領域。主營產品電磁閥、柱塞泵、數控模塊、伺服電機、可編程控制器、傳感器、氣動元件、工業儀器儀表等。經營品牌有：博世力士樂rexroth、阿托斯ATOS、Parker派克、EATON VICKERS伊頓、穆格MOOG、YUKEN油研，哈威HAWE、賀德克HYDAC等進口品牌。
德國R900347496現貨銷售

單向閥又稱止回閥或逆止閥。用于液壓系統中防止油流反向流動,或者用于氣動系統中防止壓縮空氣逆向流動。
單向閥有直通式和直角式兩種。直通式單向閥用螺紋連接安裝在管路上。直角式單向閥有螺紋連接、板式連接和法蘭連接三種形式。液控單向閥也稱閉鎖閥或保壓閥，它與單向閥相同，用以防止油液反向流動。但在液壓回路中需要油流反向流動時又可利用控制油壓，打開單向閥，使油流在兩個方向都可流動。液控單向閥采用錐形閥芯，因此密封性能好。在要求封閉油路時，可用此閥作為油路的單向鎖緊而起保壓作用。液控單向閥控制油的泄漏方式有內泄式和外泄式二種。在油流反向出口無背壓的油路中可用內泄式；否則需用外泄式，以降低控制油壓力。
德國R900347496現貨銷售

單向閥的作用
（1）普通單向閥的作用是使油液只能沿著一個方向流動,不允許反向倒流.
（2）它的用途是：安裝在泵的出口,可防止系統壓力沖擊對泵的影響,另外,泵不工作時,可防止系統油液經泵倒流回油箱,單向閥還可用來分隔油路,防止干擾.單向閥與其他閥組合便可組成復合閥.單向閥與其他閥可組成液控復合閥
（3）對于普通液控單向閥,當控制口無控制壓力時,其作用與普通單向閥一樣；當控制口有控制壓力時,通油口接通,油液便可在兩個方向自由流動.
（4）它的主要用途是：可對液壓缸進行鎖閉；作立式液壓缸的支承閥；起保壓作用.
德國R900347496現貨銷售

單向閥是氣流只能一個方向流動而不能反向流動的方向控制閥。其工作原理與液壓單向閥一樣。壓縮空氣從P口進入，克服彈簧力和摩擦力使單向閥閥口開啟，壓縮空氣從P流至A；當P口無壓縮空氣時，在彈簧力和A口(腔)余氣力作用下；閥口處于關閉狀 態，使從A至P氣流不通。單向閥應用于不允許氣流反向流動的場合，如空壓機向氣罐充氣 時，在空壓機與氣罐之間設置一單向閥，當空壓機停止工作時，可防止氣罐中的壓縮空氣回流 到空壓機。單向閥還常與節流閥、順序閥等組合成單向節流閥、單向順序閥使用。

德國R900347496現貨銷售為了能使刀具經久耐用，盡量減少磨損，需要了解各種切削因素對刀具磨損的影響。影響刀具切削性能的主要因素有：刀具幾何參數(后角、前角、主偏角、刀尖圓弧半徑等)、刀具材料、切削用量、工件材料及其機械性能等。這些因素中工件材料屬于不可控因素，改變其它因素的屬性可控制刀具的磨損形式及磨損率，如通過改變工件材料的熱處理狀態可改變工件材料的機械性能，從而影響刀具的磨損;選擇合理的刀具材料和刀具幾何參數也可改善刀具磨損;生產上一般還可通過合理選擇切削用量來減少刀具磨損，提高刀具的使用壽命。
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