REXROTH比例溢流閥0811404438

REXROTH比例溢流閥0811404438 博世力士樂(lè)優(yōu)質(zhì)商品 低價(jià)銷(xiāo)售 特價(jià)現(xiàn)貨 庫(kù)存清倉(cāng) 鑄鐵材質(zhì) 優(yōu)質(zhì)供應(yīng) 全國(guó)聯(lián)保 正品特價(jià) 歡迎來(lái)電咨詢(xún)

 

我公司專(zhuān)業(yè)代理博世力士樂(lè)（BOSCH-REXROTH）、阿托斯ATOS、派克Parker、迪普馬DUPLOMATIC、油研YUKEN;本特利bentley、貝加萊B&R、西門(mén)子、光洋KOYO，美國(guó)ASCO，美國(guó)PARKER派克 美國(guó)伊頓威格士VICKERS泵閥 日本大金DAIKIN電磁閥 美國(guó)艾爾泰克電磁閥 美國(guó)阿泰克電磁閥  等系列進(jìn)口產(chǎn)品 

REXROTH比例溢流閥0811404438   在液壓傳動(dòng)系統(tǒng)中,控制油液壓力高低的液壓閥稱(chēng)之為壓力控制閥，簡(jiǎn)稱(chēng)壓力閥。這類(lèi)閥的共同點(diǎn)是利用作用在閥芯上的液壓力和彈簧力相平衡的原理工作的。

 

一、溢流閥的基本結(jié)構(gòu)及其工作原理

 

溢流閥的主要作用是對(duì)液壓系統(tǒng)定壓或進(jìn)行安全保護(hù)。

 

（一）溢流閥的作用和性能要求

 

1．溢流閥的作用

 

在液壓系統(tǒng)中用來(lái)維持定壓是溢流閥的主要用途。它常用于節(jié)流調(diào)速系統(tǒng)中，和流量控制閥配合使用，調(diào)節(jié)進(jìn)入系統(tǒng)的流量，并保持系統(tǒng)的壓力基本恒定。用于過(guò)載保護(hù)的溢流閥一般稱(chēng)為安全閥。

 

2．液壓系統(tǒng)對(duì)溢流閥的性能要求

 

（1）定壓精度高 

 

（2）靈敏度要高

 

（3）工作要平穩(wěn)且無(wú)振動(dòng)和噪聲

 

（4）當(dāng)閥關(guān)閉時(shí)密封要好，泄漏要小。

 

（二）溢流閥的結(jié)構(gòu)和工作原理

 

常用的溢流閥按其結(jié)構(gòu)形式和基本動(dòng)作方式可歸結(jié)為直動(dòng)式和先導(dǎo)式兩種。

 

1.直動(dòng)式溢流閥

 

直動(dòng)式溢流閥是依靠系統(tǒng)中的壓力油直接作用在閥芯上與彈簧力等相平衡，以控制閥芯的啟閉動(dòng)作，溢流閥是利用被控壓力作為信號(hào)來(lái)改變彈簧的壓縮量，從而改變閥口的通流面積和系統(tǒng)的溢流量來(lái)達(dá)到定壓目的的。當(dāng)系統(tǒng)壓力升高時(shí),閥芯上升,閥口通流面積增加,溢流量增大，進(jìn)而使系統(tǒng)壓力下降。溢流閥內(nèi)部通過(guò)閥芯的平衡和運(yùn)動(dòng)構(gòu)成的這種負(fù)反饋?zhàn)饔檬瞧涠▔鹤饔玫幕�本原理，也是所有定壓閥的基本工作原理。

 

2.先導(dǎo)式溢流閥

 

圖-19所示為先導(dǎo)式溢流閥的結(jié)構(gòu)示意圖，由于先導(dǎo)閥芯一般為錐閥，受壓面積較小，所以用一個(gè)剛度不太大的彈簧即可調(diào)整較高的開(kāi)啟壓力，用螺釘調(diào)節(jié)導(dǎo)閥彈簧的預(yù)緊力，就可調(diào)節(jié)溢流閥的溢流閥壓力。

 

先導(dǎo)式溢流閥有一個(gè)遠(yuǎn)程控制口Ｋ，如果將K口用油管接到另一個(gè)遠(yuǎn)程調(diào)壓閥（遠(yuǎn)程調(diào)壓閥的結(jié)構(gòu)和溢流閥的先導(dǎo)控制部分一樣），調(diào)節(jié)遠(yuǎn)程調(diào)壓閥的彈簧力，即可調(diào)節(jié)溢流閥主閥芯上端的液壓力，從而對(duì)溢流閥的溢流壓力實(shí)現(xiàn)遠(yuǎn)程調(diào)壓。但是，遠(yuǎn)程調(diào)壓閥所能調(diào)節(jié)的較高壓力不得超過(guò)溢流閥本身導(dǎo)閥的調(diào)整壓力。當(dāng)遠(yuǎn)程控制口K通過(guò)二位二通閥接通油箱時(shí)，主閥芯上端的壓力接近于零，主閥芯上移到較高位置．閥口開(kāi)得很大。由于主閥彈簧較軟，這時(shí)溢流閥ｐ口處壓力很低,系統(tǒng)的油在低壓下通過(guò)溢流閥流回油箱，實(shí)現(xiàn)卸荷。

 

（三）溢流閥的性能 

 

溢流閥的性能包括溢流閥的靜態(tài)性能和動(dòng)態(tài)性能。

 

1.靜態(tài)性能

 

(1)壓力調(diào)節(jié)范圍

 

壓力調(diào)節(jié)范圍是指調(diào)壓彈簧在規(guī)定的范圍內(nèi)調(diào)節(jié)時(shí)，系統(tǒng)壓力能平穩(wěn)地上升或下降，且壓力無(wú)突跳及遲滯現(xiàn)象時(shí)的較大和較小調(diào)定壓力。溢流閥的較大允許流量為其額定流量，在額定流量下工作時(shí)溢流閥應(yīng)無(wú)噪聲、溢流閥的較小穩(wěn)定流量取決于它的壓力平穩(wěn)性要求，一般規(guī)定為額定流量的15％。

 

(2)啟閉特性

 

啟閉特性是指溢流閥在穩(wěn)態(tài)情況下從開(kāi)啟后到閉合的過(guò)程中，被控壓力與通過(guò)溢流閥的溢流量之間的關(guān)系。它是衡量溢流閥定壓精度的一個(gè)重要指標(biāo)，一般用溢流閥處于額定流量、調(diào)定壓力ｐs時(shí)，開(kāi)始溢流的開(kāi)啟壓力ｐk及停止溢流的閉合壓力ｐB(yǎng)分別與ｐs的百分比來(lái)衡量，前者稱(chēng)為開(kāi)啟比，后者稱(chēng)為閉合比。

 

（3）卸荷壓力

 

當(dāng)溢流閥的遠(yuǎn)程控制口及與油箱相連時(shí),額定流量下的壓力損失稱(chēng)為卸荷壓力。

上海韋米機(jī)電設(shè)備有限公司位于浦東金橋是全國(guó)工業(yè)傳動(dòng)流體自動(dòng)化領(lǐng)域?qū)嵙�較強(qiáng)的經(jīng)銷(xiāo)代理商，有著豐富的氣動(dòng)液壓技術(shù)服務(wù)、工業(yè)銷(xiāo)售及國(guó)際采購(gòu)的經(jīng)驗(yàn)，主營(yíng)產(chǎn)品涉及液壓泵閥（電磁閥、柱塞泵拳頭產(chǎn)品）、工控產(chǎn)品、驅(qū)動(dòng)模塊、伺服電機(jī)、可編程控制器PLC、數(shù)控傳動(dòng)、傳感器系列、電源、氣動(dòng)元件、工業(yè)儀器儀表。具體主要經(jīng)營(yíng)品牌及產(chǎn)品如下:

博世力士樂(lè)rexroth工業(yè)液壓氣動(dòng)元件大量現(xiàn)貨（電磁換向閥、節(jié)流閥、單向閥、比例閥、伺服閥、安全溢流閥、流量控制閥、減壓閥、調(diào)節(jié)閥、壓力繼電器、比例放大板、放大器，軸向柱塞泵、葉片泵、齒輪泵，伺服驅(qū)動(dòng)器、伺服電機(jī)，氣動(dòng)元件、氣動(dòng)閥、氣缸等），部分系列型號(hào)：

電磁閥：4WE6、4WE10、4WE16；電液閥：4WEH10H、4WEH16、4WEH25，

單向閥：S10A、S20A、Z1S、Z2S、SL10、SL20、SV10、SV20、RVP，插裝閥：LC、LFA

溢流閥：DB、DBW、DBET、DBD、ZDB、Z2DB，減壓閥：DR6DP、DR10DP、ZDR6、ZDR10、DR-4X、DR-5X

節(jié)流閥：Z2FS6、Z2FS10、Z2FS16、Z2FS22；調(diào)速閥：2FRM5、2FRM10、2FRM16，

平衡閥：FD12FA、FD12PA、FD12KA、FD16FA，繼電器：HED80、HED40，電子單元：VT、0811

比例方向閥：4WRA、4WRAE、4WRE、4WREE、4WREEM、4WRH、4WRZ、4WRZE、4WRKE、4WRBKE、4WS2EM

高頻響方向閥：4WRPH、4WRPEH、5WRP、5WRPE、4WRREH、4WRP、4WRPE、4WRP(E)H、4WRSE、4WRSEH、4WRPNH、4WRL、4WRLE、4WRVE、4WRGE、4WRL、4WRLE、4WRDE、3WRCBH，伺服系統(tǒng)：HAS、HNL、HCS、HNL

柱塞泵：A4VSO、A10VSO、A2FO，定量馬達(dá)：A2FM，A4FM，A10FM/E， 齒輪泵：0510、AZPF，葉片泵：PV7

意大利阿托斯ATOS及迪普馬DUPLOMATIC、美國(guó)Parker派克及EATON VICKERS伊頓 威格士液壓、日本YUKEN油研泵閥優(yōu)勢(shì)現(xiàn)貨系列（電磁閥換向閥、壓力開(kāi)關(guān)、柱塞泵、齒輪泵、比例閥、截止閥、開(kāi)關(guān)閥等），

奧地利貝加萊B&R  br-automation自動(dòng)化配品配件貨期短現(xiàn)貨多（伺服驅(qū)動(dòng)器、觸摸屏、工控機(jī)、CPU模塊、總線(xiàn)控制器、X20\2003\2005\2010系統(tǒng)中各類(lèi)功能模塊等）

博世力士樂(lè)rexroth先導(dǎo)式順序閥 力士樂(lè)順序閥 力士樂(lè)rexroth順序閥 博世力士樂(lè)rexroth順序閥 博世bosch力士樂(lè)順序閥

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