德國REXROTH力士樂繼電器一級代理 繼電器是一種電控制器件,是當輸入量(激勵量)的變化達到規(guī)定要求時,在電氣輸出電路中使被控量發(fā)生預(yù)定的階躍變化的一種電器。它具有控制系統(tǒng)(又稱輸入回路)和被控制系統(tǒng)(又稱輸出回路)之間的互動關(guān)系。通常應(yīng)用于自動化的控制電路中,它實際上是用小電流去控制大電流運作的一種“自動開關(guān)”。故在電路中起著自動調(diào)節(jié)、安全保護、轉(zhuǎn)換電路等作用。 繼電器是具有隔離功能的自動開關(guān)元件,廣泛應(yīng)用于遙控、遙測、通訊、自動控制、機電一體化及電力電子設(shè)備中,是zui重要的控制元件之一。 繼電器一般都有能反映一定輸入變量(如電流、電壓、功率、阻抗、頻率、溫度、壓力、速度、光等)的感應(yīng)機構(gòu)(輸入部分);有能對被控電路實現(xiàn)“通”、“斷”控制的執(zhí)行機構(gòu)(輸出部分);在繼電器的輸入部分和輸出部分之間,還有對輸入量進行耦合隔離,功能處理和對輸出部分進行驅(qū)動的中間機構(gòu)(驅(qū)動部分)。 壓力繼電器是利用液體的壓力來啟閉電氣觸點的液壓電氣轉(zhuǎn)換元件。當系統(tǒng)壓力達到壓力繼電器的調(diào)定值時,發(fā)出電信號,使電氣元件(如電磁鐵、電機、時間繼電器、電磁離合器等)動作,使油路卸壓、換向,執(zhí)行元件實現(xiàn)順序動作,或關(guān)閉電動機使系統(tǒng)停止工作,起安全保護作用等。 壓力繼電器有柱塞式、膜片式、彈簧管式和波紋管式四種結(jié)構(gòu)形式。 EDS 344-2-040-000 EDS 344-3-600-000 EDS 345-1-006-000 EDS 348-5-250-000 EDS 1791-P-600-000 EDS 1791-N-400-000 ETS 4144-A-000 ETS 1701-100-000 ENS 3116-2-0410-000-K EVS 3100-1(006-060L/min) HDA 3744-A-100-A00 HDA 3745-A-016-A00 HDA 3840-A-350-124(6m) HDA 3840-E-350-124(6m) HDA 4444-A-250-000 HDA 4445-B-400-000 ETS1701-100-Y00 EDS344-2-040-000 EDS344-2-400-000 EDS3446-3-0400-Y00+ZBE06 EDS 346-3-400-000+ZBE06-05+ZBM300' EDS344-3-250-000 EDS345-1-016-000+ZBM300 EDS 345-1-100-000 EDS 344-3-016-000 首先用于安全保護時,將壓力繼電器設(shè)置在夾緊液壓缸的一端,液壓泵啟動后,首先將工件夾緊,此時夾緊液壓缸的右腔壓力升高,當升高到壓力繼電器的調(diào)定值時,壓力繼電器動作,發(fā)出電信號使2YA通電,于是切削液壓缸進刀切削。在加工期間,壓力繼電器微動開關(guān)的常開觸點始終閉合。若工件沒有夾緊,壓力繼電器2斷開,于是2YA斷電,切削液壓缸立即停止進刀,從而避免工件未夾緊被切削而出事故。 其實用于控制執(zhí)行元件的順序動作時,液壓泵啟動后,首先2YA通電,液壓缸左腔進油,推動活塞方向右移。當碰到限位器(或死擋鐵)后,系統(tǒng)壓力升高,壓力繼電器發(fā)出電信號,使1YA通電,高壓油進入液壓缸的左腔,推動活塞右移。這時若3YA也通電,液壓缸的活塞快速右移;若3YA斷電,則液壓缸的活塞慢速右移,其慢速運動速度由節(jié)流閥調(diào)節(jié)。 再次用于液壓泵卸荷時,壓力繼電器不是控制液壓泵停止轉(zhuǎn)動,而是控制二位二通電磁閥,將液壓泵5輸出的壓力油流回油箱,使其卸荷。 zui后用于液壓泵的啟閉時,有兩個液壓泵,高壓小流量泵,低壓大流量泵。當活塞快速下降時,兩泵同時輸出壓力油。當液壓缸活塞桿抵住工件開始加壓時,壓力繼電器在壓力油作用下發(fā)出動作,觸動微動開關(guān),將常閉觸點斷開,使液壓泵停轉(zhuǎn)。在加工過程中減慢液壓缸的速度,同時減少動力消耗。 注意: 壓力繼電器必須放在壓力有明顯變化的地方才能輸出電信號。若將壓力繼電器放在回油路上,由于回油路直接接回油箱,壓力也沒有變化,所以壓力繼電器也不會工作。 德國REXROTH力士樂繼電器一級代理 本公司為“上海維特銳”,主要負責內(nèi)地進口液壓,氣動品牌的銷售和服務(wù),從德國、美國、日本、瑞典、香港、新加坡等國家直接進口液壓、氣動及工控產(chǎn)品,主要品牌:日本(NACHI、TOYOOKI、DAIKIN、CKD、KOGANEI、SUNX、KEYENCE、MACOME)德國(EPRO、FESTO、BURKERT、REXROTH、P+F、TURCK、IFM、PILZ、GSR、BALLUFF、HYDAC、HIRSCHMANN、HERION、HAWE、E+H)美國(MOOG、ASCO、MAC、PARKER、VICKERS)意大利(ATOS、UNIVER、AMISCO、CAMOZZI)瑞士(CARLO GAVAZZI、CONTRINEX)液壓及氣動工控產(chǎn)品等,經(jīng)過過多的經(jīng)銷商,從而以*廉的價格提供適合市場要求的優(yōu)質(zhì)產(chǎn)品。 R901182344 HED 5 OH-3X/50K14 R901186325 HED 5 OH-3X/50K14V R901225114 HED 5 OH-3X/50K35 R901185727 HED 5 OH-3X/100K14 R901227565 HED 5 OH-3X/100K14V R901186322 HED 5 OH-3X/200K14 R901186327 HED 5 OH-3X/200K14V R901249440 HED 5 OH-3X/200K35 R901186323 HED 5 OH-3X/350K14 R901227564 HED 5 OH-3X/350K14V R901182348 HED 5 OH-3X/350K35 R901239242 HED 5 OH-3X/350K35V R901102349 HED 8 OH-2X/50K14 R901099796 HED 8 OH-2X/50K14V R901102712 HED 8 OH-2X/50K14S R901215098 HED 8 OH-2X/50K14SV R901108007 HED 8 OH-2X/50K14A R901099798 HED 8 OH-2X/50K14AV R901107086 HED 8 OH-2X/50K14AS R901109050 HED 8 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