M-3SEW6C36/420MG24N9K4/V REXROTH電磁球閥，武漢百士自動(dòng)化設備有限公司供應產(chǎn)品，現貨庫存，原廠(chǎng)原裝，質(zhì)量保障，假一罰十，價(jià)格優(yōu)惠；移動(dòng)電話(huà)：15307180902，商務(wù)QQ：980227448，傳真：027-87680708-608，聯(lián)系人：雷青；歡迎新老客戶(hù)咨詢(xún)購買(mǎi)！
電磁閥應用
1、2位3通電磁閥控制單作用氣缸:
初始狀態(tài):電磁閥為常閉電磁閥，處于失電狀態(tài)，單作用氣缸活塞由彈簧作用在氣缸左側。
工作狀態(tài):電磁閥得電，電磁閥P口與A口通，氣源由A口進(jìn)入氣缸，氣缸活塞右移。
失電狀態(tài):電磁閥失電，電磁閥A口與R口通，氣缸通過(guò)電磁閥放氣，活塞在彈簧作用下回到左側。
2、2位3通電磁閥控制氣動(dòng)薄膜驅動(dòng)部:
初始狀態(tài):電磁閥為常閉電磁閥，處于失電狀態(tài)，氣動(dòng)薄膜驅動(dòng)部的推桿由彈簧作用下停在上位；
工作狀態(tài):電磁閥得電，電磁閥P口與A口通，氣源由A口進(jìn)入薄膜驅動(dòng)部上氣室，推動(dòng)推桿下移；
失電狀態(tài):電磁閥失電，電磁閥A口與R口通，薄膜氣室通過(guò)電磁閥放氣，推桿在彈簀作用下回到上位。
3、 2位5通單電控電磁閥控制雙作用氣缸:
初始狀態(tài):電磁閥失電狀態(tài)，電磁閥P口與A口相通， 氣源通過(guò)A口進(jìn)入雙作用氣動(dòng)活塞驅動(dòng)部左側氣室，活塞停在右側，B口與S口相通，與B口相通的氣動(dòng)活塞驅動(dòng)部的右側氣室為排氣狀態(tài)；
工作狀態(tài):電磁閥得電，電磁閥P口與B口通，氣源由B口進(jìn)入雙作用氣動(dòng)活塞驅動(dòng)部右側氣室，活塞移動(dòng)到左側，A口與R口相通， 與R口相通的氣動(dòng)活塞驅動(dòng)部的左側氣室為排氣狀態(tài)；
失電狀態(tài):電磁閥恢復初始狀態(tài)。
4、 2位5通雙電控電磁閥控制雙作用氣缸:左側線(xiàn)圈得電狀態(tài):電磁閥左側線(xiàn)圈得電，電磁閥P口與A口通，氣源由A口進(jìn)入雙作用氣動(dòng)活塞驅動(dòng)部-側氣室，推動(dòng)活塞到氣缸另一側，B口與S口相通，與B口相通的氣動(dòng)活塞驅動(dòng)部的另一側氣室為排氣狀態(tài)，在另一側線(xiàn)圈不得電之前會(huì )保持該狀態(tài)不動(dòng)；
右側線(xiàn)圈得電狀態(tài):電磁閥右側線(xiàn)圈得電，電磁閥P口與B口通，氣源由B口進(jìn)入雙作用氣動(dòng)活塞驅動(dòng)部一側氣室， 推動(dòng)活塞到氣缸另一側，A口與R口相通，與A口相通的氣動(dòng)活塞驅動(dòng)部的另一側氣室為排氣狀態(tài)，在另一側線(xiàn)圈不得電之前會(huì )保持該狀態(tài)不動(dòng)。
液動(dòng)換向閥
工作原理:
利用控制油路的油液壓力來(lái)改變閥芯位置的換向閥。
特點(diǎn):
(1) 換向速度易于控制，結構簡(jiǎn)單、動(dòng)作平穩可靠;
(2)由于液壓驅動(dòng)力大，適用于大流量的場(chǎng)合;
(3)其控制油路必須有開(kāi)關(guān)或換向裝置。
⑤電液動(dòng)換向閥
組成
電磁閥:電磁閥負責液動(dòng)閥控制油路的換向，起先導作用。
液動(dòng)閥:負責主油路的換向。
特點(diǎn):
(1)換向平穩無(wú)沖擊;
(2)允許通過(guò)的流量大。
4、換向閥的滑閥機能
常態(tài)位:
換向閥的閥芯未受到外部操縱力作用時(shí)所處的位置。
滑閥機能:
閥芯處于常態(tài)位(原始位置)時(shí)各油口的連通方式。如二位閥有“常通型”、常斷型
中位機能:三位換向閥的閥芯在中間位置時(shí)，各油口的連通方式，稱(chēng)為換向閥的中位機能。
壓力控制閥
作用:
用來(lái)控制液壓傳動(dòng)系統中油液的壓力，以滿(mǎn)足執行元件所要求的力和轉矩。
類(lèi)型:
溢流閥、減壓閥、順序閥、壓力繼電器等。
共同點(diǎn):
利用作用在閥芯上的液壓力和彈簧力相平衡的原理工作。
溢流閥
類(lèi)型:直動(dòng)式、先導式
作用:
(1)在不斷溢流過(guò)程中保持系統壓力恒定，起穩壓和溢流作用(p,FP
系統’閥口常開(kāi)) ;
(2)防止液壓系統過(guò)載，起安全保護作用(p,=1.1~1.2p,max，閥口常閉)
(一)溢流閥的基本結構及其工作原理
1、直動(dòng)式溢流閥
工作原理:
直接利用液壓力與彈簧力相平衡以控制閥芯的啟閉動(dòng)作，從而保證進(jìn)油口壓力基本恒定。
特點(diǎn):
①閥芯所受的液壓力全靠彈簧力平衡，故當系統壓力很高時(shí)，彈簧必須很硬，導致結構笨重，調壓不輕便。一般用于壓力小于2.5MPa的低壓系統中，作安全閥或背壓閥使用。
②由于慣性或負載的變化，導致q、變化，即開(kāi)口度h的變化，由于k很大，所以p不穩定，穩壓精度差;
③結構簡(jiǎn)單、便宜，但工作時(shí)易產(chǎn)生振動(dòng)和噪音。
2、
先導式溢流閥
結構:先導調壓部分:控制主閥的溢流壓力；主閥部分:溢流
工作原理:
利用主閥芯上下兩端液體壓力差與彈簧力相平衡的原理來(lái)進(jìn)行壓力控制。
特點(diǎn):
①因為錐閥作用面積很小，即使壓力很高，彈簧剛度仍不大，調壓輕便;
②因為主閥彈簧很軟，因此溢流量變化時(shí)，壓力波動(dòng)小。靜態(tài)特性好;
③能適應各種不同的調壓范圍的要求;
④主閥芯采用錐面閥座式結構密封，沒(méi)有搭合量，動(dòng)作靈敏。
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液壓傳動(dòng)基本原理
從原理上來(lái)說(shuō)，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(shuō)，液體各處的壓強是一致的，這樣，在平衡的系統中，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(guò)液體的傳遞，可以得到不同端上的不同的壓力，這樣就可以達到一個(gè)變換的目的。我們所常見(jiàn)到的液壓千斤頂就是利用了這個(gè)原理來(lái)達到力的傳遞。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(lái)工作，所以一般也稱(chēng)為容積液壓泵。齒輪泵是最常見(jiàn)的一-種液壓泵，它通過(guò)兩個(gè)嚙合的齒輪的轉動(dòng)使得液體進(jìn)行運動(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(wèn)題包括消耗的能量、效率、降低噪音。液壓執行元件是用來(lái)執行將液壓泵提供的液壓能轉變成機械能的裝置，主要包括液壓缸和液壓馬達。液壓馬達是與液壓泵做相反的工作的裝置，也就是把液壓的能量轉換稱(chēng)為機械能，從而對外做功。液壓控制元件用來(lái)控制液體流動(dòng)的方向、壓力的高低以及對流量的大小進(jìn)行預期的控制，以滿(mǎn)足特定的工作要求。正是因為液壓控制元器件的靈活性,使得液壓控制系統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，液壓控制系統還需要液壓輔助元件。這些元件包括管路和管接頭、油箱、過(guò)濾器.蓄能器和密封裝置。通過(guò)以上的各個(gè)器件，我們就能夠建設出一個(gè)液壓回路。所謂液壓回路就是通過(guò)各種液壓器件構成的相應的控制回路。根據不同的控制目標，我們能夠設計不同的回路，比如壓力控制回路、速度控制回路、多缸工作控制回路等。根據液壓傳動(dòng)的結構及其特點(diǎn)，在液壓系統的設計中，首先要進(jìn)行系統分析，然后擬定系統的原理圖，其中這個(gè)原理圖是用液壓機械符號來(lái)表示的。
之后通過(guò)計算選擇液壓器件，進(jìn)而再完成系統的設計和調試。這個(gè)過(guò)程中，原理圖的繪制是最關(guān)鍵的。它決定了一個(gè)設計系統的優(yōu)劣。液壓傳動(dòng)的應用性是很強的，比如裝卸堆碼機液壓系統，它作為一種倉儲機械，在現代化的倉庫里利用它實(shí)現紡織品包、油桶、木桶等貨物的裝卸機械化工作。也可以應用在萬(wàn)能外圓磨床液壓系統等生產(chǎn)實(shí)踐中。這些系統的特點(diǎn)是功率比較大，生產(chǎn)的效率比較高，平穩性比較好。
因為氣液壓傳動(dòng)有許多突出的優(yōu)點(diǎn)，因此它在民用工業(yè)中的應用更加廣泛。小到一般工業(yè)用的塑料加工機械、壓力機械、機床等;行走機械中的工程機械、建筑機械、農業(yè)機械、汽車(chē)等;大到鋼鐵工業(yè)用的冶金機械、提升裝置、軋輥調整裝置等;土木水利工程用的防洪閘門(mén)及堤壩裝置、河床升降裝置、橋梁操縱機構等;發(fā)電廠(chǎng)渦輪機調速裝置、核發(fā)電廠(chǎng)等國;船舶用的甲板起重機械、船頭門(mén)、艙壁閥、船尾推進(jìn)器等;特殊技術(shù)用的巨型天線(xiàn)控制裝置、測量浮標、升降旋轉舞臺等。
現在的工業(yè)已經(jīng)發(fā)展成為了一個(gè)相當龐大的工業(yè)體系，可以分為制造業(yè)、建筑業(yè)、服務(wù)業(yè)等幾大部門(mén)，液壓與氣動(dòng)技術(shù)在制造業(yè)和建筑業(yè)中應用的較多，特別是大型的裝備制造業(yè)中,氣液壓的作用相當重要,例如我們經(jīng)常見(jiàn)到的挖掘機、推土機、鏟車(chē)等，都是通過(guò)一個(gè)個(gè)的液壓桿來(lái)傳遞動(dòng)力，從而指使各個(gè)部件運動(dòng)，最終達到工作目的。建筑業(yè)中，大型的軌行式施工機械，可以將重達幾百?lài)崕浊嵉牟牧线\送到規定的地點(diǎn)并完成工作，例如高鐵高架橋的修建，大部分的橋梁
部件都是在一個(gè)地方澆灌鑄成，然后再用運輸車(chē)運送到大橋上安裝上的，整個(gè)過(guò)程需要功率相當大的液壓組合機械來(lái)完成。
氣液壓作為一個(gè)廣泛應用的技術(shù)，在未來(lái)更是有廣闊的前景。隨著(zhù)社會(huì )主義建設步伐的加快，我國交通、能源、鐵路、民航等基礎設施建設進(jìn)程的快速發(fā)展，大型建筑施工和資源開(kāi)發(fā)規模不斷擴大，工程機械在市場(chǎng)上的需求大大增加，各個(gè)方面對于氣壓液壓的依賴(lài)會(huì )越來(lái)越強，而且要求也會(huì )越來(lái)越高，同時(shí)，這些大型工程面臨的作業(yè)環(huán)境更為苛刻、工祝條件更為復雜等所帶來(lái)的挑戰，也進(jìn)一步推動(dòng)著(zhù)對氣液壓傳動(dòng)技術(shù)的深入研究，隨著(zhù)計算機技術(shù)的深入發(fā)展，液壓控制系統可以和智能控制的技術(shù)、計算機控制的技術(shù)等技術(shù)結合起來(lái)，這樣就能夠在更多的場(chǎng)合中發(fā)揮作用。以更加精巧的、更加靈活地完成預期的控制任務(wù)。氣液壓傳動(dòng)技術(shù)已經(jīng)在各個(gè)方面改變了人類(lèi)的生活，但始終不能滿(mǎn)足人們的要求，氣液壓傳動(dòng)技術(shù)還有很大的發(fā)展空間。
液壓挖掘機是工程機械的一個(gè)重要品種，是一種廣泛用于建筑、鐵路、公路、水利、采礦等建設工程的土方機械。液壓挖掘機利用液壓元件（液壓泵、液壓馬達、液壓缸等）帶動(dòng)各種構件動(dòng)作，具有許多優(yōu)點(diǎn)，于是它對液壓系統的設計提出了很高的要求，其液壓系統也是工程機械液壓系統中最為復雜的。挖掘機由多個(gè)系統組成，包括液壓系統，傳動(dòng)系統，操縱系統，工作裝置，底架，轉臺，油箱，發(fā)動(dòng)機安裝等。