上海弘佩液壓設(shè)備有限公司是一家從事經(jīng)營(yíng)國(guó)外進(jìn)口液壓氣動(dòng)備件、自動(dòng)化儀表的貿(mào)易公司；專(zhuān)注于工業(yè)傳動(dòng)自動(dòng)化流體領(lǐng)域。主營(yíng)產(chǎn)品電磁閥、柱塞泵、數(shù)控模塊、伺服電機(jī)、可編程控制器、傳感器、氣動(dòng)元件、工業(yè)儀器儀表等。經(jīng)營(yíng)品牌有：博世力士樂(lè)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(jìn)口品牌。
R900580383大量現(xiàn)貨

單向閥又稱(chēng)止回閥或逆止閥。用于液壓系統(tǒng)中防止油流反向流動(dòng),或者用于氣動(dòng)系統(tǒng)中防止壓縮空氣逆向流動(dòng)。
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(chēng)閉鎖閥或保壓閥，它與單向閥相同，用以防止油液反向流動(dòng)。但在液壓回路中需要油流反向流動(dòng)時(shí)又可利用控制油壓，打開(kāi)單向閥，使油流在兩個(gè)方向都可流動(dòng)。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(shí)，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(nèi)泄式和外泄式二種。在油流反向出口無(wú)背壓的油路中可用內(nèi)泄式；否則需用外泄式，以降低控制油壓力。
R900580383大量現(xiàn)貨

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(gè)方向流動(dòng),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(tǒng)壓力沖擊對(duì)泵的影響,另外,泵不工作時(shí),可防止系統(tǒng)油液經(jīng)泵倒流回油箱,單向閥還可用來(lái)分隔油路,防止干擾.單向閥與其他閥組合便可組成復(fù)合閥.單向閥與其他閥可組成液控復(fù)合閥
（3）對(duì)于普通液控單向閥,當(dāng)控制口無(wú)控制壓力時(shí),其作用與普通單向閥一樣；當(dāng)控制口有控制壓力時(shí),通油口接通,油液便可在兩個(gè)方向自由流動(dòng).
（4）它的主要用途是：可對(duì)液壓缸進(jìn)行鎖閉；作立式液壓缸的支承閥；起保壓作用.
R900580383大量現(xiàn)貨

單向閥是氣流只能一個(gè)方向流動(dòng)而不能反向流動(dòng)的方向控制閥。其工作原理與液壓?jiǎn)蜗蜷y一樣。壓縮空氣從P口進(jìn)入，克服彈簧力和摩擦力使單向閥閥口開(kāi)啟，壓縮空氣從P流至A；當(dāng)P口無(wú)壓縮空氣時(shí)，在彈簧力和A口(腔)余氣力作用下；閥口處于關(guān)閉狀 態(tài)，使從A至P氣流不通。單向閥應(yīng)用于不允許氣流反向流動(dòng)的場(chǎng)合，如空壓機(jī)向氣罐充氣 時(shí)，在空壓機(jī)與氣罐之間設(shè)置一單向閥，當(dāng)空壓機(jī)停止工作時(shí)，可防止氣罐中的壓縮空氣回流 到空壓機(jī)。單向閥還常與節(jié)流閥、順序閥等組合成單向節(jié)流閥、單向順序閥使用。

R900580383大量現(xiàn)貨九十五：什么是三視圖?答：常稱(chēng)主視圖，俯視圖，左視圖三個(gè)基本視圖為三視圖。九十六：鉚工進(jìn)行裝配的三要素是什么?答：是支撐，定位，夾緊。九十七：什么是矯正?答：矯正就是將鋼材在外力作用下產(chǎn)生塑性變形，使鋼材局部收縮的纖維拉長(zhǎng)，伸長(zhǎng)的纖維縮短，達(dá)到金屬部分的纖維長(zhǎng)度均勻，以消除表面不平，彎曲，扭曲和波浪變形的缺陷，從而獲得正確的形狀。九十八：三角形展開(kāi)的原理是什么?答：原理是將零件表面分成一組或很多組三角形，然后求出各組三角形每邊的實(shí)長(zhǎng)，并把它們的形狀依次畫(huà)在平面上，得到展開(kāi)圖。
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