產(chǎn)品詳情
REXROTH流量控制閥2FRM10-31/50LB,德國力士樂全新原裝,現(xiàn)貨庫存,價(jià)格優(yōu)惠;
液壓閥是一種用壓力油操作的自動(dòng)化元件,它受配壓閥壓力油的控制,通常與電磁配壓閥組合使用,可用于遠(yuǎn)距離控制水電站油、氣、水管路系統(tǒng)的通斷。常用于夾緊、控制、潤滑等油路。有直動(dòng)型與先導(dǎo)型之分,多用先導(dǎo)型。
液壓閥是一種用壓力油操作的自動(dòng)化元件,它受配壓閥壓力油的控制,通常與電磁配壓閥組合使用,可用于遠(yuǎn)距離控制水電站油、氣、水管路系統(tǒng)的通斷。用于降低并穩(wěn)定系統(tǒng)中某一支路的油液壓力,常用于夾緊、控制、潤滑等油路。有直動(dòng)型、先導(dǎo)型、疊加型之分.液壓傳動(dòng)中用來控制液體壓力﹑流量和方向的元件。其中控制壓力的稱為壓力控制閥,控制流量的稱為流量控制閥,控制通﹑斷和流向的稱為方向控制閥。
液壓閥按控制方法分類:手動(dòng),電控,液控
按功能分類:流量閥(節(jié)流閥、調(diào)速閥,分流集流閥)、壓力閥(溢流閥,減壓閥,順序閥,卸荷閥)、方向閥(電磁換向閥、手動(dòng)換向閥、單向閥、液控單向閥)
按安裝方式分:板式閥,管式閥,疊加閥,螺紋插裝閥,蓋板閥
武漢百士自動(dòng)化設(shè)備有限公司專注于歐美品牌液壓、氣動(dòng)、工控自動(dòng)化備件銷售,質(zhì)量保障,價(jià)格優(yōu)惠;銷售熱線:15307180902 ,聯(lián)系人:雷青。聯(lián)系電話:027-87680708-606。熱誠歡迎新老客戶咨詢購買!
液壓或氣動(dòng)技術(shù)在工業(yè)中的應(yīng)用
液壓傳動(dòng)和氣壓傳動(dòng)統(tǒng)稱為流體傳動(dòng),是根據(jù)17世紀(jì)帕斯卡提出的液體靜壓力傳動(dòng)原理,利用液體與氣體來傳遞能量的一門新興技術(shù),是工農(nóng)業(yè)生產(chǎn)中廣為應(yīng)用的一門技術(shù)。液壓技術(shù)最初用水作為工作介質(zhì),以水壓機(jī)的形式將其應(yīng)用于工業(yè)上,后來隨著技術(shù)的逐步進(jìn)步,介質(zhì)改為油,至今大部分的液壓機(jī)械仍然是使用油作為介質(zhì),但制造出來的產(chǎn)品無論在性能、范圍、用途等各方面都是以往的技術(shù)所不能比及的。經(jīng)過二百多年的發(fā)展,到如今,流體與氣體傳動(dòng)技術(shù)水平的高低已成為一個(gè)國家工業(yè)發(fā)展水平的重要標(biāo)志。液壓與氣動(dòng)技術(shù)開始大范圍的應(yīng)用是在二十世紀(jì),特別是1920年以后,發(fā)展更為迅速。液壓元件大約在19世紀(jì)術(shù)20世紀(jì)初的20年間,才開始進(jìn)入正規(guī)的工業(yè)生產(chǎn)階段。1925年維克斯發(fā)明了壓力平衡式葉片泵,為近代液壓元件工業(yè)或液壓傳動(dòng)標(biāo)準(zhǔn)的逐步建立奠定了基礎(chǔ)。20世紀(jì)初康斯坦丁尼斯克對(duì)能量波動(dòng)傳遞進(jìn)行了理論及實(shí)際研究。
液壓技術(shù)一般應(yīng)用于重型、大型、特大型設(shè)備,如冶金行業(yè)軋機(jī)壓下系統(tǒng),連鑄機(jī)壓下系統(tǒng)等;高速響應(yīng)隨動(dòng)系統(tǒng)等工程機(jī)械,抗沖擊,要求功重比較高系統(tǒng)一般都采用液壓系統(tǒng),這是應(yīng)用液壓技術(shù)的最大的三個(gè)領(lǐng)域。
液壓傳動(dòng)基本原理
從原理上來說,液壓傳動(dòng)所基于的最基本的原理就是帕斯卡原理,就是說,液體各處的壓強(qiáng)是一致的,這樣,在平衡的系統(tǒng)中,比較小的活塞上面施加的壓力比較小,而大的活塞上施加的壓力也比較大,這樣能夠保持液體的靜止。所以通過液體的傳遞,可以得到不同端上的不同的壓力,這樣就可以達(dá)到一個(gè)變換的目的。我們所常見到的液壓千斤頂就是利用了這個(gè)原理來達(dá)到力的傳遞。液壓傳動(dòng)中所需要的元件主要有動(dòng)力元件、執(zhí)行元件、控制元件、輔助元件等。其中液壓動(dòng)力元件是為液壓系統(tǒng)產(chǎn)生動(dòng)力的部件,主要包括各種液壓泵。液壓泵依靠容積變化原理來工作,所以一般也稱為容積液壓泵。齒輪泵是最常見的一-種液壓泵,它通過兩個(gè)嚙合的齒輪的轉(zhuǎn)動(dòng)使得液體進(jìn)行運(yùn)動(dòng)。其他的液壓泵還有葉片泵、柱塞泵,在選擇液壓泵的時(shí)候主要需要注意的問題包括消耗的能量、效率、降低噪音。液壓執(zhí)行元件是用來執(zhí)行將液壓泵提供的液壓能轉(zhuǎn)變成機(jī)械能的裝置,主要包括液壓缸和液壓馬達(dá)。液壓馬達(dá)是與液壓泵做相反的工作的裝置,也就是把液壓的能量轉(zhuǎn)換稱為機(jī)械能,從而對(duì)外做功。液壓控制元件用來控制液體流動(dòng)的方向、壓力的高低以及對(duì)流量的大小進(jìn)行預(yù)期的控制,以滿足特定的工作要求。正是因?yàn)橐簤嚎刂圃骷撵`活性,使得液壓控制系統(tǒng)能夠完成不同的活動(dòng)。液壓控制元件按照用途可以分成壓力控制閥、流量控制閥、方向控制閥。按照操作方式可以分成人力操縱閥、機(jī)械操縱法、電動(dòng)操縱閥等。除了上述的元件以外,液壓控制系統(tǒng)還需要液壓輔助元件。這些元件包括管路和管接頭、油箱、過濾器.蓄能器和密封裝置。通過以上的各個(gè)器件,我們就能夠建設(shè)出一個(gè)液壓回路。所謂液壓回路就是通過各種液壓器件構(gòu)成的相應(yīng)的控制回路。根據(jù)不同的控制目標(biāo),我們能夠設(shè)計(jì)不同的回路,比如壓力控制回路、速度控制回路、多缸工作控制回路等。根據(jù)液壓傳動(dòng)的結(jié)構(gòu)及其特點(diǎn),在液壓系統(tǒng)的設(shè)計(jì)中,首先要進(jìn)行系統(tǒng)分析,然后擬定系統(tǒng)的原理圖,其中這個(gè)原理圖是用液壓機(jī)械符號(hào)來表示的。
之后通過計(jì)算選擇液壓器件,進(jìn)而再完成系統(tǒng)的設(shè)計(jì)和調(diào)試。這個(gè)過程中,原理圖的繪制是最關(guān)鍵的。它決定了一個(gè)設(shè)計(jì)系統(tǒng)的優(yōu)劣。液壓傳動(dòng)的應(yīng)用性是很強(qiáng)的,比如裝卸堆碼機(jī)液壓系統(tǒng),它作為一種倉儲(chǔ)機(jī)械,在現(xiàn)代化的倉庫里利用它實(shí)現(xiàn)紡織品包、油桶、木桶等貨物的裝卸機(jī)械化工作。也可以應(yīng)用在萬能外圓磨床液壓系統(tǒng)等生產(chǎn)實(shí)踐中。這些系統(tǒng)的特點(diǎn)是功率比較大,生產(chǎn)的效率比較高,平穩(wěn)性比較好。
REXROTH流量控制閥2FRM10-31/50LB
力士樂REXROTH二通流量控制閥2FRM
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力士樂REXROTH二通流量控制閥2FRH
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力士樂REXROTH雙向流量控制閥2FRW
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順序閥(Sequence valve)是指在具有二個(gè)以上分支回路的系統(tǒng)中,根據(jù)回路的壓力等來控制執(zhí)行元件動(dòng)作順序的閥。該閥還可作為卸荷閥和背壓閥使用。
按工作原理和結(jié)構(gòu),順序閥分直動(dòng)式和先導(dǎo)式兩類;按壓力控制方式,順序閥有內(nèi)控和外控之分。 在順序閥中裝有單向閥,能通過反向液流的復(fù)合閥稱為單向順序閥。一般說來,這種閥使用較多。
順序閥的基本功能是控制多個(gè)執(zhí)行元件的順序動(dòng)作,根據(jù)其功能的不同,分別稱為順序閥、背壓閥、卸荷閥和平衡閥。 順序閥的性能與溢流閥基本相同,但由于功能的不同,對(duì)順序閥還有其特殊的要求:
(1)為了使執(zhí)行元件準(zhǔn)確實(shí)現(xiàn)順序動(dòng)作,要求順序閥的調(diào)壓精度高,偏差??;
(2)為了順序動(dòng)作的準(zhǔn)確性,要求閥關(guān)閉時(shí)內(nèi)泄漏量?。?br />
(3)對(duì)于單向順序閥,要求反向壓力損失及正向壓力損失值均應(yīng)較小。 順序閥的主要作用有:
(1)控制多個(gè)元件的順序動(dòng)作;
(2)用于保壓回路;
(3)防止因自重引起油缸活塞自由下落而做平衡閥用;
(4)用外控順序閥做卸荷閥,使泵卸荷;
(5)用內(nèi)控順序閥作背壓閥。