鄒城液壓系統批發-加煤液壓系統批發-力建液壓系統(多圖)
威海力建(jian)液壓設備(bei)廠(chang)
經(jing)營模式：生產加工
地址：山東省(sheng)威海市羊亭孫家(jia)灘(tan)工業(ye)園
主營：液(ye)壓缸,油缸,液(ye)壓系(xi)統
業(ye)務(wu)熱(re)線(xian)：
QQ：3049278720
產品詳情(qing) 聯系方式
產品品牌：威海力建
供貨總量：不限
價格說明：議定
包裝說明：不限
物流說明：貨運及物流
交貨說明：按訂單
有效期至：長期有效
液壓(ya)傳(chuan)動中(zhong)用來(lai)控制(zhi)液體壓(ya)力、流量和方(fang)向(xiang)(xiang)的元件。其中(zhong)控制(zhi)通、斷和流向(xiang)(xiang)的稱(cheng)為方(fang)向(xiang)(xiang)控制(zhi)閥。
方向(xiang)控(kong)制閥(fa)(fa)按(an)用途分為單向(xiang)閥(fa)(fa)和換向(xiang)閥(fa)(fa)。
1、單向(xiang)閥(fa)：只允許流(liu)體在管道中單向(xiang)接(jie)通，反向(xiang)即(ji)切斷。
2、換向閥(fa)(fa)：改(gai)變不同管路間的(de)(de)(de)通(tong)(tong)(tong)(tong)、斷關系、根(gen)據(ju)(ju)閥(fa)(fa)芯(xin)在閥(fa)(fa)體中的(de)(de)(de)工(gong)作位(wei)置(zhi)數分兩位(wei)、三(san)位(wei)等；根(gen)據(ju)(ju)所控制的(de)(de)(de)通(tong)(tong)(tong)(tong)道數分兩通(tong)(tong)(tong)(tong)、三(san)通(tong)(tong)(tong)(tong)、四(si)通(tong)(tong)(tong)(tong)、五通(tong)(tong)(tong)(tong)等；如二位(wei)二通(tong)(tong)(tong)(tong)、三(san)位(wei)三(san)通(tong)(tong)(tong)(tong)，三(san)位(wei)五通(tong)(tong)(tong)(tong)等根(gen)據(ju)(ju)閥(fa)(fa)芯(xin)驅動方式(shi)分手動、機動、電磁、液動等。
60年代(dai)后期，在上述幾種液(ye)(ye)壓(ya)控(kong)(kong)制閥(fa)(fa)的基礎上又研制出(chu)電(dian)液(ye)(ye)比(bi)例(li)控(kong)(kong)制閥(fa)(fa)。它的輸出(chu)量(liang)(壓(ya)力、流量(liang))能隨(sui)輸入的電(dian)信(xin)號連(lian)續變化。電(dian)液(ye)(ye)比(bi)例(li)控(kong)(kong)制閥(fa)(fa)按作用不同，相應地分為電(dian)液(ye)(ye)比(bi)例(li)壓(ya)力控(kong)(kong)制閥(fa)(fa)、電(dian)液(ye)(ye)比(bi)例(li)流量(liang)控(kong)(kong)制閥(fa)(fa)和(he)電(dian)液(ye)(ye)比(bi)例(li)方向控(kong)(kong)制閥(fa)(fa)等(deng)。
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液(ye)(ye)(ye)(ye)壓(ya)(ya)(ya)(ya)(ya)閥(fa)在(zai)(zai)(zai)(zai)液(ye)(ye)(ye)(ye)壓(ya)(ya)(ya)(ya)(ya)系統中(zhong)(zhong)(zhong)(zhong)的(de)(de)(de)(de)(de)工(gong)(gong)(gong)作(zuo)方式是(shi)閥(fa)體和(he)閥(fa)芯相對(dui)運(yun)(yun)動，這種工(gong)(gong)(gong)作(zuo)方式不可避免的(de)(de)(de)(de)(de)就是(shi)磨損。液(ye)(ye)(ye)(ye)壓(ya)(ya)(ya)(ya)(ya)閥(fa)的(de)(de)(de)(de)(de)閥(fa)體和(he)閥(fa)芯進行相對(dui)運(yun)(yun)動的(de)(de)(de)(de)(de)過(guo)程(cheng)中(zhong)(zhong)(zhong)(zhong)，會(hui)不斷的(de)(de)(de)(de)(de)摩擦，在(zai)(zai)(zai)(zai)工(gong)(gong)(gong)作(zuo)一段時(shi)間后，液(ye)(ye)(ye)(ye)壓(ya)(ya)(ya)(ya)(ya)閥(fa)各元(yuan)件(jian)之間的(de)(de)(de)(de)(de)尺寸、形狀、質(zhi)量等發生變化，不再是(shi)液(ye)(ye)(ye)(ye)壓(ya)(ya)(ya)(ya)(ya)閥(fa)原(yuan)有的(de)(de)(de)(de)(de)特性，在(zai)(zai)(zai)(zai)液(ye)(ye)(ye)(ye)壓(ya)(ya)(ya)(ya)(ya)閥(fa)工(gong)(gong)(gong)作(zuo)中(zhong)(zhong)(zhong)(zhong)就會(hui)失(shi)效，出現(xian)故(gu)障。例如，在(zai)(zai)(zai)(zai)液(ye)(ye)(ye)(ye)壓(ya)(ya)(ya)(ya)(ya)系統中(zhong)(zhong)(zhong)(zhong)的(de)(de)(de)(de)(de)減壓(ya)(ya)(ya)(ya)(ya)閥(fa)工(gong)(gong)(gong)作(zuo)中(zhong)(zhong)(zhong)(zhong)，錐(zhui)閥(fa)和(he)閥(fa)座(zuo)之間因為長(chang)時(shi)間的(de)(de)(de)(de)(de)摩擦、磨損，造(zao)成(cheng)零件(jian)之間的(de)(de)(de)(de)(de)配合度(du)不好，在(zai)(zai)(zai)(zai)液(ye)(ye)(ye)(ye)壓(ya)(ya)(ya)(ya)(ya)系統中(zhong)(zhong)(zhong)(zhong)，減壓(ya)(ya)(ya)(ya)(ya)閥(fa)就無法(fa)起到減壓(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)作(zuo)用(yong)。
開式系統和閉(bi)式系統：
按照(zhao)液(ye)壓回路的(de)基本(ben)構成可以(yi)把(ba)液(ye)壓系(xi)統(tong)劃分為開式系(xi)統(tong)和閉式系(xi)統(tong)。
開式系統：
泵所輸出的(de)壓(ya)力(li)油在完成(cheng)做功任務后從執(zhi)行駛器返(fan)回油箱(xiang)。應用(yong)普遍，但油箱(xiang)要足夠的(de)大(da)。有油缸的(de)系(xi)統肯定是(shi)開式(shi)系(xi)統
閉式系統：
泵(beng)輸出的壓力油(you)從執行器再返回(hui)(hui)泵(beng)，從而(er)形(xing)成閉式(shi)回(hui)(hui)路。多用于(yu)車輛的行走(zou)驅動，用升壓泵(beng)補油(you)，并且用沖(chong)洗(xi)閥局(ju)部換油(you)。
與(yu)開式(shi)回(hui)路(lu)相比(bi)，閉式(shi)回(hui)路(lu)（特別是制動時有功率回(hui)收(shou)的效果），發熱量少，執行(xing)器的前進、后退(tui)平(ping)穩；但是泵必須是雙流向變(bian)量泵。
