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。
原裝R901086059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。
原裝R901086059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.
原裝R901086059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。

原裝R901086059現貨銷售下面我們就從機床工作臺的傳動結構、導軌結構、驅動方式等幾個方面進行闡述。絲杠及其安裝結構絲杠的精度固然重要，但是如果絲杠的安裝結構不合理，再好的絲杠也無濟于事。首先要觀查絲杠的形式，看看是滾珠絲杠，還是三角螺紋絲杠或梯形螺紋絲杠。在線切割機床上，滾珠絲杠優于三角螺紋絲杠和梯形螺紋絲杠，并且要求絲杠的直徑盡可能大些，增加剛性。其次是絲杠的安裝結構、滾珠絲杠屬精密傳動部件，因此要想充分發揮其精密性，那么對絲杠的裝配結構要求也較高，必須采用兩端固定、軸承支撐，對于大行程機床，還要對絲杠進行預拉伸，以減少絲杠的撓度，從而提高機床工作臺的運動精度。齒輪傳動結構首先要詳細了解齒輪箱內齒輪數量，參加傳動的齒輪越多，傳動阻力越大，齒面易磨損，傳動易產生齒輪間隙，導致機床工作臺的系統誤差越大，齒輪越多如果裝配不好還易產生偶然誤差，所以傳動齒輪越少越好，采用一對齒輪傳動誤差，所以選型時深入了解工作臺運動的齒輪傳動結構是非常重要的。仔細觀察工作臺傳動齒輪箱的工作環境，潤滑性能。有些廠家的早期機床由于設計上的不合理，使切削液很容易進到齒輪箱里，使齒輪長期在切削液的浸泡中工作，這種設計是非常不合理的，輕者增加齒輪的磨損，重者使步進電機進水燒壞，所以用戶在選型時一定要觀察工作臺齒輪箱的位置，確保切削液一定不能浸入，這點對機床精度保持性至關重要。導軌的剛性及整體結構導軌是保證工作臺運動精度的關鍵，用戶在選型時應高度重視。首先觀察導軌的橫截面的大小，在同等條件下，越粗狀，剛性越好，加工中越不易產生變形，其次是向廠商了解導軌的材料和熱處理工藝。一般來講，為保證其強度且變形小，以高碳合金鋼、整體淬火或越音頻淬火工藝為較好。直接觀察導軌結構，目前市場上常見的導軌結構有以下幾種：1鑲鋼滾珠式滾動導軌；鋼滾柱式滾動導軌；線滾動導軌；性軸承鑄鐵導軌。
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