力士樂底板安裝壓力繼電器HED8OP-2X/100K14KW R901107370，德國REXROTH底板安裝壓力繼電器，購買進口液壓、氣動、自動化控制工業(yè)配件，認準“上海韋米機電設(shè)備有限公司”，7年老店，產(chǎn)品實拍，保證產(chǎn)品原廠原裝，現(xiàn)貨供應(yīng)，價格優(yōu)惠，售后無憂，歡迎新老客戶咨詢采購！

液壓-電氣壓力開關(guān)：
特點：
→用于底板安裝
→用于 G1/4" 管道安裝
→用于法蘭連接，符合 ISO 16873 標準
→作為垂直疊加元件，與閥板相連接，符合 ISO 4401 標準
→5 個壓力等級
→4 種調(diào)整類型：
→帶/不帶保護帽的調(diào)節(jié)桿
→帶刻度的調(diào)節(jié)桿，帶/不帶保護帽
→帶刻度旋鈕
→帶刻度可鎖定旋鈕
→電氣連接
– 帶有 A 設(shè)計的閥連接器
（大型方形連接器）
– 帶 M12 x 1 連接器
→帶常閉/常開觸點功能的微動開關(guān)
→電流零電位轉(zhuǎn)換（1 mA 至 2 A）
→壓力范圍經(jīng)過 UL 認證，高達 350 bar
 
液壓系統(tǒng)中的壓力控制閥
在液壓系統(tǒng)中,壓力控制閥可以調(diào)定系統(tǒng)主回路或分支回路的壓力.按照功能分類,常用的壓力控制閥有溢流閥,減壓閥,順序閥和壓力繼電器等.這些壓力控制閥結(jié)構(gòu)上相似,但性能有差別,在系統(tǒng)中的作用也不盡相同.搞清它們的區(qū)別與聯(lián)系,對于學(xué)習(xí)壓力控制回路以至液壓系統(tǒng)的分析廣片常重要的。
一,溢流閥
功能 溢流閥的功能是通過閥口溢流,使被控系統(tǒng)或回路的壓力保持穩(wěn)定,實現(xiàn)穩(wěn)壓,調(diào)壓或限壓的作用.
特點 按照結(jié)構(gòu),溢流閥有直動式和先導(dǎo)式兩種.對于直動式溢流閥,當(dāng)壓力較高,流量較大時,要求調(diào)壓彈簧有很大的剛度,調(diào)節(jié)性能較差,而滑閥的泄漏也使高壓控制難以實現(xiàn),故只能用于低壓小流量場合.先導(dǎo)式溢流閥的特點是用先導(dǎo)閥控制主閥,在溢流閥主閥溢流時,溢流閥進口壓力可維持為由先導(dǎo)閥彈簧所調(diào)定的定值.先導(dǎo)式溢流閥的另一特點是具有遠程控制口,可很方便地實現(xiàn)系統(tǒng)卸荷或運程調(diào)壓。
溢流閥的泄漏油或流經(jīng)先導(dǎo)閥的油液在返回油祚時有內(nèi)泄和外泄兩種方式.內(nèi)泄時泄漏油流經(jīng)的彈簧腔或先導(dǎo)閥彈簧座通過閥體內(nèi)的連接通道與出油口和通,而外泄是泄露油或流經(jīng)先導(dǎo)閥的油液被直接單獨引回油箱。
應(yīng)用 溢流閥的主要用途:(1)在定量泵的出口并聯(lián)溢流閥可調(diào)節(jié)泵的出口壓力;(2)在變量泵的出口并聯(lián)溢流閥可對系統(tǒng)起到過載保護作用;(3)在回油路上摟入直動式溢流閥可使執(zhí)行元件運動平穩(wěn);(4)利用先導(dǎo)式溢流閥的遠程控制口可實現(xiàn)系統(tǒng)卸荷或遠程調(diào)壓.總之,在系統(tǒng)中溢流閥可作為溢流閥,安全閥,背壓閥使用,可以調(diào)節(jié)系統(tǒng)的壓力或使系統(tǒng)卸荷.
二,減壓閥
功能 減壓閥的功能在于使流經(jīng)減壓閥的油液壓力降低,并使與減壓閥出口連接的回路壓力保持穩(wěn)定.即減壓閥的出口壓力可維持恒定,不受進口壓力及通過流量的影響。
特點 按照結(jié)構(gòu)減壓閥也有直動式和先導(dǎo)式兩種,分別用于不同場合.
堿壓限的閥心處在原始位置上時,它的閥口是打開的,閥的進,出口溝通.閥心由出口處的壓力控制,出口壓力未達到調(diào)定壓力時閥口全開,閥心不動.當(dāng)出口壓力達到調(diào)定壓力時,閥心上移,閥口關(guān)小,在調(diào)定壓力下達到平衡.當(dāng)減壓閥的出口處不輸出油液時,它的出口壓力仍能夠基本保持恒定,此時有少量油液經(jīng)先導(dǎo)閥流回油箱。
減壓閥與溢流閥的主要區(qū)別為:(1)減壓閥能保持出口處的壓力基本不變,而溢流閥則保持進口處的壓力基本不變;(2)在不工作時,減壓閥的進出油口互通,溢流閥的進出油口不通;(3)減壓閥要求外泄,其先導(dǎo)閥的彈簧腔需通過泄油口單獨外接油箱,而溢流閥允許內(nèi)泄,其先導(dǎo)閥彈簧腔通過閥體內(nèi)的連接通道與出油口相通,不必單獨外接油箱。
應(yīng)用 減壓閥主要用于降低系統(tǒng)某一支路的油液壓力,在同一系統(tǒng)中得到兩個或多個不同壓力的回路.常用于夾緊支路,潤滑支路或電液動換向閥的控制回路.需要注意的是減壓閥具有壓力損失,當(dāng)分支油路比主油路的壓力低很多,且流量較大時,可考慮采用高,低壓泵分別供油.
三,順序閥
功能 順序閥的功能在于利用液壓系統(tǒng)中的壓力變化,控制油路通斷來控制多個執(zhí)行元件的順序動作
特點 按照結(jié)構(gòu),順序閥也有直動式和先導(dǎo)式兩種.直動式順序閥結(jié)構(gòu)簡單,動作靈敏但調(diào)定壓力較低,較高壓力時宜采用先導(dǎo)式順序閥.根據(jù)控制壓力來源的不同,順序閥有內(nèi)控式和外控式之分,請注意兩者圖形符號的區(qū)別.內(nèi)控式順序閥在進油路壓力達到設(shè)定壓力之前,閥口一直是關(guān)閉的,達到設(shè)定壓力后閥口打開,使壓力油進入油路;外控式順序閥閥口的開閉與油路進口壓力無關(guān),僅取決于控制油路壓力的大小。
順序閥與溢流閥的主要區(qū)別為:(1)當(dāng)順序閥的出口與負載油路相通時,泄漏油和先導(dǎo)控制油必須外泄,而溢流閥的出口與回油相通,泄漏油和先導(dǎo)控制油可外泄也可內(nèi)泄;(2)溢流閥的進口壓力是限定的,即閥的調(diào)定壓力,順序閥的進口壓力由負載決定,順序閥開啟后可隨負載增加市進一步升高.
應(yīng)用 順序閥的主要用途為:(1)控制多個執(zhí)行元件的順序動作;(2)內(nèi)控式順序閥可作背壓閥使用;(3)與單向閥并聯(lián)組成平衡閥,鎖定執(zhí)行元件;(4)外控順序閥可用于雙泵供油系統(tǒng)的卸荷.
四,壓力繼電器
壓力繼電器是利用液體壓力信號控制電氣觸點通斷的液壓電氣轉(zhuǎn)換元件,當(dāng)油液的壓力達到其設(shè)定壓力時,壓力繼電器發(fā)出電信號,以控制電氣元件動作,實現(xiàn)執(zhí)行元件的順序動作或系統(tǒng)的安全保護和動作互鎖。
力士樂底板安裝壓力繼電器HED8OP-2X/100K14KW R901107370
力士樂REXROTH壓力繼電器訂貨號和型號：
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液壓機是一種以液體為工作介質(zhì)，用來傳遞能量以實現(xiàn)各種工藝的機器。液壓機除用于鍛壓成形外，也可用于矯正、壓裝、打包、壓塊和壓板等。液壓機包括水壓機和油壓機。以水基液體為工作介質(zhì)的稱為水壓機,以油為工作介質(zhì)的稱為油壓機。液壓機的規(guī)格一般用公稱工作力（千牛）或公稱噸位（噸）表示。鍛造用液壓機多是水壓機，噸位較高。為減小設(shè)備尺寸，大型鍛造水壓機常用較高壓強（35兆帕左右），有時也采用 100兆帕以上的超高壓。其他用途的液壓機一般采用 6～25兆帕的工作壓強。油壓機的噸位比水壓機低。

基本原理是油泵把液壓油輸送到集成插裝閥塊，通過各個單向閥和溢流閥把液壓油分配到油缸的上腔或者下腔，在高壓油的作用下，使油缸進行運動.液壓機是 利用液體來傳遞壓力的設(shè)備。液體在密閉的容器中傳遞壓力時是遵循帕斯卡定律。四柱液壓機的液壓傳動系統(tǒng)由動力機構(gòu)、控制機構(gòu)、執(zhí)行機構(gòu)、輔助機構(gòu)和工作介質(zhì)組成。動力機構(gòu)通常采用油泵作為動力機構(gòu)，一般為積式油泵。為了滿足執(zhí)行機構(gòu)運動速度的要求， 選用一個油泵或多個油泵。低壓（油壓小于2.5MP）用齒輪泵；中壓（油壓小于6.3MP）用葉片泵；高壓（油壓小于32.0MP)用柱塞泵。各種可塑性 材料的壓力加工和成形，如不銹鋼板的擠壓、彎曲、拉深及金屬零件的冷壓成形，同時亦可用于粉末制品、砂輪、膠木、樹脂熱固性制品的壓制。

驅(qū)動系統(tǒng)
液壓機的驅(qū)動系統(tǒng)主要有泵直接驅(qū)動和泵-蓄能器驅(qū)動兩種型式。泵直接驅(qū)動，這種驅(qū)動系統(tǒng)的泵向液壓缸提供高壓工作液體，配流閥用來改變供液方向，溢流閥用來調(diào)節(jié)系統(tǒng)的限定壓強，同時起安全溢流作用。這種驅(qū)動系統(tǒng)環(huán)節(jié)少,結(jié)構(gòu)簡單,壓強能按所需的工作力自動增減，減少了電能消耗，但須由液壓機的大工作力和高工作速度來決定泵及其驅(qū)動電機的容量。這種型式的驅(qū)動系統(tǒng)多用于中小型液壓機，也有用泵直接驅(qū)動的大型（如120000千牛）自由鍛造水壓機。

泵－蓄能器驅(qū)動 　在這種驅(qū)動系統(tǒng)中有一個或一組蓄能器。當(dāng)泵所供給的高壓工作液有余量時，由蓄能器儲存；而當(dāng)供給量不足于需要時，便由蓄能器補充供給。采用這種系統(tǒng)可以按高壓工作液的平均用量選用泵和電動機的容量，但因為工作液的壓強是恒定的，電能消耗量較大，并且系統(tǒng)的環(huán)節(jié)多，結(jié)構(gòu)比較復(fù)雜。這種驅(qū)動系統(tǒng)多用于大型液壓機，或者用一套驅(qū)動系統(tǒng)驅(qū)動數(shù)臺液壓機。

沖壓機是通過電動機驅(qū)動飛輪，并通過離合器，傳動齒輪帶動曲柄連桿機構(gòu)使滑塊上下運動，帶動拉伸模具對鋼板成型。沖壓機也叫沖床，學(xué)名為壓力機。

沖壓機是通過電動機驅(qū)動飛輪，并通過離合器，傳動齒輪帶動曲柄連桿機構(gòu)使滑塊上下運動，帶動拉伸模具對鋼板成型。所謂的雙動就是指壓力機有兩個滑塊，分為內(nèi)滑塊和外滑塊，內(nèi)滑塊帶動模具的凸�；虬寄�，外滑塊帶動模具上的壓邊圈，在拉伸時壓邊圈首先動作壓住鋼板邊緣，內(nèi)滑塊再動作進行拉伸。

設(shè)計原理是將圓周運動轉(zhuǎn)換為直線運動，由主電動機出力，帶動飛輪，經(jīng)離合器帶動齒輪、曲軸（或偏心齒輪）、連桿等運轉(zhuǎn)，來達成滑塊的直線運動，從主電動機到連桿的運動為圓周運動。
連桿和滑塊之間需有圓周運動和直線運動的轉(zhuǎn)接點，其設(shè)計上大致有兩種機構(gòu)，一種為球型，一種為銷型（圓柱型） ，經(jīng)由這個機構(gòu)將圓周運動轉(zhuǎn)換成滑塊的直線運動。沖壓機對材料施以壓力，使其塑性變形，而得到所要求的形狀與精度，因此必須配合一組模具（分上模與下模），將材料置于其間，由機器施加壓力，使其變形，加工時施加于材料之力所造成之反作用力，由沖壓機機械本體所吸收。

力士樂REXROTH液壓元件應(yīng)用行業(yè)：注塑機、吹塑機、橡膠和發(fā)泡機、陶瓷壓機、同步折彎機(折板機),、剪板機(剪床）、沖切/步?jīng)_、金屬壓力機、彎曲/鋸床、機床、食品機械、皮革/鞋機、木材/造紙機械、鋼鐵業(yè)/鑄造、壓鑄機/擠壓機、電廠、生態(tài)能源（風(fēng)能-水力-太陽能）設(shè)備、油和天然氣工業(yè)設(shè)備、混凝土泵、路機、鉆井/開采設(shè)備、起重機、升降機/叉車、推土機、道路，隧道，水壩工程設(shè)備、壓縮機、街道維修設(shè)備、模擬器/娛樂設(shè)備、卡車、鐵路工程設(shè)備、航空工業(yè)設(shè)備、船舶/航海工業(yè)設(shè)備、打谷機/噴灑機、拖拉機/收割機。