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伺服閥是-種根據(jù)輸入信號(hào)及輸出信號(hào)反饋量連續(xù)成比例地控制流量和壓力的液壓控制閥。根據(jù)輸入信號(hào)的方式不同，又分電液伺服閥和機(jī)液伺服閥。電液伺服閥將小功率的電信號(hào)轉(zhuǎn)換為大功率的液壓能輸出，實(shí)現(xiàn)執(zhí)行元件的位移、速度、加速度及力的控制。
電液伺服閥由電氣一機(jī)械轉(zhuǎn)換裝置、液壓放大器和反饋(平衡)機(jī)構(gòu)三部分組成。
電氣一機(jī)械轉(zhuǎn)換裝置將輸入的電信號(hào)轉(zhuǎn)換為轉(zhuǎn)角或直線位移輸出，常稱為力矩馬達(dá)或力馬達(dá)。
電液比例閥是一種性能介于普通控制閥和電液伺服閥之間的新閥種。它既可以根據(jù)輸入電信號(hào)的大小連續(xù)成比例地對(duì)油液的壓力、流量、方向?qū)崿F(xiàn)遠(yuǎn)距離控制、計(jì)算機(jī)控制，又在制造成本、抗污染等方面優(yōu)于電液伺服閥。
電液比例閥根據(jù)用途分為:電液比例壓力閥，電液比例流量閥，電液比例方向閥。
電液比例閥的控制性能低于電液伺服閥，因此廣泛應(yīng)用于要求不高的一般工業(yè)部門(mén)。
電液比例溢流閥
組成:
比例電磁鐵+直動(dòng)式溢流閥主體
工作原理:
輸入一I，產(chǎn)生一電磁力，作用于閥心上，得到- -控制壓力，其pI, I變化，p也變化。
電液比例換向閥
比例電磁鐵替代普通電磁換向閥中的普通電磁鐵即可。
工作原理:輸入- ~I,得到一個(gè)運(yùn)動(dòng)方向，并且還可改變輸出流量的
大小;改變電流信號(hào)極性，即可改變運(yùn)動(dòng)方向。
比例調(diào)速閥
組成:
比例電磁鐵替代調(diào)速閥中的調(diào)節(jié)螺帽即可。
工作原理:輸入—I, 得到一相應(yīng)運(yùn)動(dòng)，使節(jié)流閥閥口變化，流量變化，qV∞I。


液壓控制閥,
一、液壓控制閥的分類
1.概述
在液壓系統(tǒng)中,用于控制和調(diào)節(jié)工作壓力的高低、流量大小以及改變流量方向的元件統(tǒng)稱為液壓控制閥。液壓控制閥通過(guò)對(duì)工作液體的壓力、流量以及流液方向的控制與調(diào)節(jié),從而可以控制液壓執(zhí)行元件的開(kāi)啟、停止和換向,調(diào)節(jié)其運(yùn)動(dòng)速度和輸出扭矩(或力)
2.液壓控制閥的分類 .
2.1按功能分類
(1)壓力控制閥用于控制或調(diào)節(jié)液壓系統(tǒng)或回路壓力的閥， 如溢流閥、減壓閥、順序閥壓力繼電器等;
(2)方向控制閥用于控制或調(diào)節(jié)液壓系統(tǒng)或回路中方向及其通和斷,從而控制執(zhí)行元件的運(yùn)動(dòng)方向及其啟動(dòng)、停止的閥。如單向閥、換向閥等;
(3)流量控制閥用于控制或調(diào)節(jié)液壓系統(tǒng)或回路中工作液體流量大小的閥。如節(jié)流閥、調(diào)速閥、分集流閥等
2.2按閥的控制方式分類
液壓控制閥按控制方式可分為:
(1)開(kāi)關(guān)(或定值)控制閥:借助于通斷型電磁鐵及手動(dòng)、機(jī)動(dòng)、液動(dòng)等方式,將閥芯位置或閥芯上的彈簧設(shè)定在某一工作狀態(tài) ,使液流的壓力、流量或流向保持不變的閥。這類閥屬于常見(jiàn)的普通液壓閥
(2)比例控制閥:采用比例電磁鐵(或力矩馬達(dá))將輸入信號(hào)轉(zhuǎn)換成力或閥的機(jī)械位移,使閥的輸出(壓力、流量)也按照其輸入量連續(xù)、成比例地進(jìn)行控制的閥,比例控制閥一般屬于開(kāi)環(huán)控制閥, 現(xiàn)在也很多用在閉環(huán)系統(tǒng)中。
(3)伺服控制閥:其輸入信號(hào)(電量、機(jī)械量)多為偏差信號(hào)(輸入信號(hào)與反饋信號(hào)的差值),閥的輸出量( 壓力、流量)也按照其輸入量連續(xù)、成比例地進(jìn)行控制的閥。這類閥的工作性能類似于比例控制閥,但具有較高的動(dòng)態(tài)瞬應(yīng)和靜態(tài)性能,多用于要求較高的、響應(yīng)快的閉環(huán)液壓控制系統(tǒng)。
(4)數(shù)字控制閥:用于數(shù)字信息直接控制的閥類。

二、壓力控制閥
壓力控制閥(簡(jiǎn)稱壓力閥)是用來(lái)控制液壓傳動(dòng)系統(tǒng)或氣壓傳動(dòng)系統(tǒng)中流體壓力的一種控制閥。
常用的壓力閥有:溢流閥、減壓閥、順序閥和壓力繼電器等。
大型鋼廠現(xiàn)場(chǎng)采用的壓力控制閥種類很多, 如:減壓溢流閥、比例減壓閥、先導(dǎo)式溢流閥、直動(dòng)式溢流閥、溢流閥、電磁溢流閥、板式減壓閥、減壓閥、比例減壓溢流閥、壓力補(bǔ)償器。
針對(duì)具有代表性的,現(xiàn)場(chǎng)易出故障的壓力控制閥的工作原理和結(jié)構(gòu)進(jìn)行分析。
1、DR型先導(dǎo)式減壓閥
1.結(jié)構(gòu)分析
其組成主要包括帶主閥插件(3)的主閥(1)和帶壓力調(diào)節(jié)組件的先導(dǎo)閥(2)。在靜態(tài)位置,閥常開(kāi)，油液可自由地從油口B經(jīng)主閥芯插件(3)進(jìn)入油口A。油口A的壓力作用于主閥芯的底側(cè)。同時(shí)作用于先導(dǎo)閥(2)中的球閥(6)上, 經(jīng)節(jié)流孔(4)作用于主閥芯(3)的彈簧加載側(cè),并且流經(jīng)油口(5)。
同樣,壓力經(jīng)節(jié)流孔(7)、控制油路(8)、單向閥(9)和節(jié)流孔(10)作用于球閥(6)上。根據(jù)彈簧(11)的設(shè)定,在球閥(6)前部、油口(5)中和彈簧腔(12)內(nèi)建壓,保持控制活塞(13)處于開(kāi)啟位置。
油液可自由地從油口B經(jīng)主閥芯插件(3)流入油口A，直至油口A的壓力超過(guò)彈簧(11)的設(shè)定值,并打開(kāi)球閥(6)、控制活塞(13)移至關(guān)閉位置。
當(dāng)油口A的壓力與彈簧設(shè)定壓力之間達(dá)到平衡時(shí), 獲得期望的減壓壓力。控制油經(jīng)控制油路(15)由外部從彈簧腔(14)泄回油箱。通過(guò)安裝一個(gè)可選的單向閥 (16)可實(shí)現(xiàn)從油口A至B的自由返回流動(dòng)。壓力表接口(17)用于油口A的減壓壓力監(jiān)測(cè)。

2、3DR型先導(dǎo)式減壓閥
1.結(jié)構(gòu)分析
3DR型減壓閥是三通先導(dǎo)式減壓閥,起到減壓溢流作用。
減壓閥主要包括帶控制閥芯(2)的主閥(1) 和帶調(diào)壓裝置(10)的先導(dǎo)控制閥(3)。在靜態(tài)位置,閥常開(kāi),油液可自由地從油口P經(jīng)主閥芯(2)進(jìn)入油口A。油口A的壓力通過(guò)孔(4)作用于主閥芯的右側(cè)壓縮彈簧。同時(shí)通過(guò)節(jié)流孔(6)作用于主閥(2)的彈簧一側(cè)(6)上 ,經(jīng)通道(5)作用于先導(dǎo)球閥(7)。
根據(jù)彈簧(11)的設(shè)定,在球閥(7)之前和通道(5)中建壓,保持控制閥芯(2)處于開(kāi)啟位置。油液可自由地從油口P經(jīng)主閥芯流入油口A ,直至油口A的壓力超過(guò)彈簧(11)的設(shè)定值,并打開(kāi)球閥(7)
當(dāng)油口A的壓力與彈簧設(shè)定壓力之間達(dá)到平衡時(shí),獲得期望的減壓壓力。
如果油口A的壓力在外力的作用下繼續(xù)升高, 主閥芯(2)繼續(xù)壓向彈簧(9)，這樣油口A通過(guò)腔(8)與油口T相連,多余的壓力油泄回油箱,從而確保減壓壓力不變。
先導(dǎo)油的回油必須外泄到Y(jié)口, Y口油液要無(wú)背壓自由回油箱。
壓力表連接(14)用于油口A的減壓壓力監(jiān)測(cè)。

3、DB/DBW型先導(dǎo)式溢流閥
1.結(jié)構(gòu)分析
DB和DBW型壓力控制閥是先導(dǎo)式溢流閥。它們用于限制( DB型),或用電磁鐵限制及卸荷系統(tǒng)壓力( DBW型)
該溢流閥(DB型)的組成主要包括帶主閥芯插件(3)的主閥(1)和帶壓力調(diào)節(jié)組件的先導(dǎo)閥(2 ) DB型溢流閥油路A中的壓力作用于主閥芯( 3 )上。同時(shí),壓力經(jīng)帶節(jié)流孔(4)和(5 )的控制通路(6 )和( 7 ),作用在主閥芯( 3 )的彈簧加載側(cè)及先導(dǎo)閥(2)的球(8)上。
如果A口的壓力超過(guò)彈簧(9)的設(shè)定值,球(8)克服彈簧力(9)而使先導(dǎo)閥開(kāi)啟。該信號(hào)經(jīng)控制信道( 10 )和(6 )從A口內(nèi)部獲取。主閥芯(3 )彈簧加載側(cè)的油液經(jīng)過(guò)控制通路(7 )節(jié)流孔(11 )和球閥(8 )流入彈簧腔( 12)對(duì)DB..5*/.- .型它由控制通路( 13 )內(nèi)部引入油箱, 而對(duì)DB.. 5...型經(jīng)控制通路( 14 )它由外部弓入油箱。節(jié)流孔(4 )和(5 )在主閥芯(3 )兩端產(chǎn)生壓降,因此A到B連接通道被打開(kāi)。油液由A口流向B口,而設(shè)定工作壓力保持不變。
溢流閥借助油口X ( 15 )可對(duì)不同壓力(二級(jí)壓力)卸荷或切換。
REXROTH比例流量閥FESX32CA-10/320LZ4M
力士樂(lè)REXROTH流量控制閥
力士樂(lè)流量控制閥
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力士樂(lè)REXROTH二通流量控制閥2FRM6B
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R900205513 2FRM6B36-3X/25QRV
R900205513 2FRM6B36-32/25QRV
R901350281 2FRM6B36-3X/25QXCMV
R901130292 2FRM6B36-3X/25QXCRV
R900211949 2FRM6B36-3X/32QJRV
R900205514 2FRM6B36-3X/32QMV
R900205514 2FRM6B36-32/32QMV
R900205515 2FRM6B36-3X/32QRV
R900205515 2FRM6B36-33/32QRV
R900224841 2FRM6B36-3X/3QJRV
R900205516 2FRM6B36-3X/3QMV
R900205517 2FRM6B36-3X/3QRV
R901041036 2FRM6B36-3X/3QXCRV
R901312058 2FRM6B36-3X/6QJMV
R900218302 2FRM6B36-3X/6QJRV
R900205518 2FRM6B36-3X/6QMV
R901228897 2FRM6B36-3X/6QR
R900205519 2FRM6B36-3X/6QRV
R900205519 2FRM6B36-32/6QRV
R901223872 2FRM6B36-3X/6QXCMV
R901030544 2FRM6B36-3X/6QXCRV
R901334995 2FRM6B36-3X=6QRV
R900218309 2FRM6B76-3X/0,2QMV
R900214482 2FRM6B76-3X/0,2QRV
R900212813 2FRM6B76-3X/0,6QMV
R900213151 2FRM6B76-3X/0,6QRV
R900210900 2FRM6B76-3X/1,5QMV
R901158940 2FRM6B76-3X/1,5QR
R900211379 2FRM6B76-3X/1,5QRV
R900943457 2FRM6B76-3X/10QJMV
R900221367 2FRM6B76-3X/10QJRV
R900205520 2FRM6B76-3X/10QMV
R900209927 2FRM6B76-3X/10QRV
R900766443 2FRM6B76-3X/16QJMV
R900221021 2FRM6B76-3X/16QJRV
R900211156 2FRM6B76-3X/16QMMIL15
R900205521 2FRM6B76-3X/16QMV
R900205522 2FRM6B76-3X/16QRV
R900724606 2FRM6B76-3X/25QJMV
R900221368 2FRM6B76-3X/25QJRV
R900205523 2FRM6B76-3X/25QMV
R900205524 2FRM6B76-3X/25QRV
R900221369 2FRM6B76-3X/32QJRV
R900205525 2FRM6B76-3X/32QMV
R900205526 2FRM6B76-3X/32QRV
R900988802 2FRM6B76-3X/3QJRV
R900209088 2FRM6B76-3X/3QMV
R900211776 2FRM6B76-3X/3QRV
R900221360 2FRM6B76-3X/6QJRV
R900205527 2FRM6B76-3X/6QMV
R900205528 2FRM6B76-3X/6QRV
R901289015 2FRM6B76-3X=10QMV
R901298094 2FRM6B76-3X=25QMV
力士樂(lè)REXROTH雙向流量控制閥2FRM6SB
R900221105 2FRM6SB36-3X/0,2QMV
R900221127 2FRM6SB36-3X/0,2QRV
R900221106 2FRM6SB36-3X/0,6QMV
R900221128 2FRM6SB36-3X/0,6QRV
R900221107 2FRM6SB36-3X/1,5QMV
R900212928 2FRM6SB36-3X/1,5QRV
R900221121 2FRM6SB36-3X/10QMV
R900216502 2FRM6SB36-3X/10QRV
R900221122 2FRM6SB36-3X/16QMV
R900221137 2FRM6SB36-3X/16QRV
R900221125 2FRM6SB36-3X/25QMV
R900221139 2FRM6SB36-3X/25QRV
R900221126 2FRM6SB36-3X/32QMV
R900221158 2FRM6SB36-3X/32QRV
R900221109 2FRM6SB36-3X/3QMV
R900221130 2FRM6SB36-3X/3QRV
R900221117 2FRM6SB36-3X/6QMV
R900221135 2FRM6SB36-3X/6QRV
R901001077 2FRM6SB76-3X/0,2QMV
R900244273 2FRM6SB76-3X/0,2QRV
R901028678 2FRM6SB76-3X/0,6QMV
R900987757 2FRM6SB76-3X/1,5QRV
R901020533 2FRM6SB76-3X/10QMV
R900241336 2FRM6SB76-3X/10QRV
R901332323 2FRM6SB76-3X/16QMV
R900228321 2FRM6SB76-3X/16QRV
R901005959 2FRM6SB76-3X/25QMV
R900243434 2FRM6SB76-3X/25QRV
R900990704 2FRM6SB76-3X/32QJMV
R900716706 2FRM6SB76-3X/32QMV
R900739151 2FRM6SB76-3X/32QRV
R901161500 2FRM6SB76-3X/3QMV
R901018475 2FRM6SB76-3X/3QRV
R900758552 2FRM6SB76-3X/6QMV
R900990368 2FRM6SB76-3X/6QRV
力士樂(lè)REXROTH二通流量控制閥2FRM
R900380675 2FRM16-3X/100LBSO150
R900336496 2FRM16-3X/100LB/5
R900387807 2FRM16-3X/160LSO150
R900498494 2FRM16-3X/160L/5
R900467731 2FRM16-3X/160LBSO150
R900336497 2FRM16-3X/160LB/5
R900458091 2FRM16-3X/16L
R900370530 2FRM16-3X/16LSO130
R900453941 2FRM16-3X/16LB
R900490013 2FRM16-3X/25LSO130
R900427525 2FRM16-3X/25LB
R900466077 2FRM16-3X/40LSO150
R900424887 2FRM10-3X/10L
R900464963 2FRM10-3X/10LSO130
R900414607 2FRM10-3X/10LSO169
R900598776 2FRM10-3X/10LSO200
R900466601 2FRM10-3X/10LSO50
R900490197 2FRM10-3X/10LSO70
R900423250 2FRM10-3X/10LB
R900412219 2FRM10-3X/10LBSO128
R900463375 2FRM10-3X/10LBSO130
R900400505 2FRM10-3X/10LBSO183
R900448303 2FRM10-3X/10LBJ
R901348411 2FRM10-3X/10LBJV
R900440368 2FRM10-3X/10LBV
R900344343 2FRM10-3X/10LJ
R900391290 2FRM10-3X/10LJSO223
R900427774 2FRM10-3X/10LV
R900599376 2FRM10-3X/10LVSO244
R900599377 2FRM10-3X/10LVSO245
R900424673 2FRM10-3X/10Q
R900488842 2FRM10-3X/10QSO130
R900442350 2FRM10-3X/10QB
R900465767 2FRM10-3X/10QBW6
R900447196 2FRM10-3X/10QV
R900423251 2FRM10-3X/16L
R900349387 2FRM10-3X/16LSO150
R900465024 2FRM10-3X/16LSO130
R900461839 2FRM10-3X/16LSO63
R900380613 2FRM10-3X/16L/5
R900423252 2FRM10-3X/16LB
R900463596 2FRM10-3X/16LBSO128
R900475777 2FRM10-3X/16LBSO130
R900354594 2FRM10-3X/16LBJ
R900457677 2FRM10-3X/16LBJSO199
R900437694 2FRM10-3X/16LBV
R900499624 2FRM10-3X/16LJ
R900362811 2FRM10-3X/16LJV
R900423253 2FRM10-3X/16LV
R900356599 2FRM10-3X/16LVSO130
R900424933 2FRM10-3X/16Q
R900512794 2FRM10-3X/16QSO130
R900597354 2FRM10-3X/16QSO63
R900434256 2FRM10-3X/16QB
R900406726 2FRM10-3X/16QBW6
R900344318 2FRM10-3X/16QJ
R900432630 2FRM10-3X/1Q
R900439985 2FRM10-3X/1QB
R900353167 2FRM10-3X/1QBSO130
R900421789 2FRM10-3X/1QBV
R900988740 2FRM10-3X/1QJ
R900423255 2FRM10-3X/25L
R900384414 2FRM10-3X/25LSO150
R900333564 2FRM10-3X/25LSO100
R900464805 2FRM10-3X/25LSO130
R900462670 2FRM10-3X/25LSO136
R900358332 2FRM10-3X/25LSO280
R900415518 2FRM10-3X/25LSO70
R900414252 2FRM10-3X/25LSO97
R900380610 2FRM10-3X/25L/5
R900423256 2FRM10-3X/25LB
R900464454 2FRM10-3X/25LBSO130
R900362428 2FRM10-3X/25LBSO182
R900418659 2FRM10-3X/25LBSO183
R900337957 2FRM10-3X/25LBSO466
R900389455 2FRM10-3X/25LBJ
R900427522 2FRM10-3X/25LBV
R900401594 2FRM10-3X/25LBVSO50
R900494447 2FRM10-3X/25LJ
R900391291 2FRM10-3X/25LJSO223
R900331067 2FRM10-3X/25LJV
R900427523 2FRM10-3X/25LV
R900479744 2FRM10-3X/25LVSO130
R900424037 2FRM10-3X/25Q
R900333905 2FRM10-3X/25QSO130
R900424015 2FRM10-3X/25QB
R900451502 2FRM10-3X/25QJV
R900423254 2FRM10-3X/2L
R900472502 2FRM10-3X/2LSO130
R900346800 2FRM10-3X/2LSO169
R900471255 2FRM10-3X/2LSO50
R900436366 2FRM10-3X/2LB
R900580210 2FRM10-3X/2LBSO130
R900349835 2FRM10-3X/2LV
R900424831 2FRM10-3X/2Q
R900410908 2FRM10-3X/2QSO130
R900438040 2FRM10-3X/2QB
R900991478 2FRM10-3X/2QEB
R900364203 2FRM10-3X/35L
R900331583 2FRM10-3X/35LSO97
R900455542 2FRM10-3X/35LB
R900497430 2FRM10-3X/35LBJ
R900586236 2FRM10-3X/35LJ
R900584877 2FRM10-3X/35LJV
R900446174 2FRM10-3X/3Q
R900420286 2FRM10-3X/50L
R900479549 2FRM10-3X/50LSO150
R900462568 2FRM10-3X/50LSO130
R900358333 2FRM10-3X/50LSO280
R900987004 2FRM10-3X/50LSO50
R900416552 2FRM10-3X/50LSO63
R900475628 2FRM10-3X/50LSO70
R900355723 2FRM10-3X/50LSO99
R900331205 2FRM10-3X/50L/5
R900072065 2FRM10-3X/50L=LB
R900423261 2FRM10-3X/50LB
R900423261 2FRM10-31/50LB
R987120312 2FRM10-3X/50LBDRUKWAAGEGEBLOKKEERD
R900467863 2FRM10-3X/50LBSO130
R900463597 2FRM10-3X/50LBSO160
R900489955 2FRM10-3X/50LBSO197
R900526109 2FRM10-3X/50LBSO200
R900351504 2FRM10-3X/50LBSO207
R901250979 2FRM10-3X/50LBSO263
R900411045 2FRM10-3X/50LBJ
R900433620 2FRM10-3X/50LBJSO199
R900533609 2FRM10-3X/50LBJV
R900424898 2FRM10-3X/50LBV
R900479743 2FRM10-3X/50LBVSO130
R900466286 2FRM10-3X/50LJ
R900353991 2FRM10-3X/50LJSO209
R900391292 2FRM10-3X/50LJSO223
R900427776 2FRM10-3X/50LV
R900442648 2FRM10-3X/50QB
R900423258 2FRM10-3X/5L
R900409902 2FRM10-3X/5LSO4
R900423259 2FRM10-3X/5LB
R900416990 2FRM10-3X/5LBSO130
R900488841 2FRM10-3X/5LBJ
R900359466 2FRM10-3X/5LBV
R900455777 2FRM10-3X/5LV
R900529904 2FRM10-3X/5LVSO244
R900424732 2FRM10-3X/5Q
R900424776 2FRM10-3X/5QB
R900440258 2FRM10-3X/5QE
R900212686 2FRM10-3X=10L
R901247928 2FRM10-3X=50LB
R900771371 2FRM10-7-3X/16L
R900745525 2FRM10-7-3X/25LB
R901196197 2FRM10-7-3X/35LB
R900744247 2FRM10-7-3X/50L
R900745526 2FRM10-7-3X/50LB
R900770289 2FRM10-7-3X/50LV
R900424905 2FRM16-3X/100L
R900466056 2FRM16-3X/100LSO100
R900462063 2FRM16-3X/100LSO130
R900462671 2FRM16-3X/100LSO132
R900586538 2FRM16-3X/100LSO182
R900443804 2FRM16-3X/100LSO280
R900488082 2FRM16-3X/100LSO50
R900420287 2FRM16-3X/100LB
R900371837 2FRM16-3X/100LBSO122
R900478768 2FRM16-3X/100LBSO130
R901250980 2FRM16-3X/100LBSO263
R900337958 2FRM16-3X/100LBSO466
R900411378 2FRM16-3X/100LBJ
R900447368 2FRM16-3X/100LBJSO218
R900471183 2FRM16-3X/100LBV
R900433570 2FRM16-3X/100LJ
R900344432 2FRM16-3X/100LJSO174
R900429596 2FRM16-3X/100LV
R900456011 2FRM16-3X/100QB
R900447971 2FRM16-3X/125L
R900415315 2FRM16-3X/125LB
R900424906 2FRM16-3X/160L
R900465439 2FRM16-3X/160LSO130
R900391601 2FRM16-3X/160LSO70
R900574724 2FRM16-3X/160L=LB
R900424902 2FRM16-3X/160LB
R900473620 2FRM16-3X/160LBSO122
R900595383 2FRM16-3X/160LBSO130
R900525060 2FRM16-3X/160LBSO253
R900416601 2FRM16-3X/160LBJ
R900534016 2FRM16-3X/160LBJV
R900424034 2FRM16-3X/160LBV
R900463601 2FRM16-3X/160LJ
R900342887 2FRM16-3X/160LJSO198
R900427777 2FRM16-3X/160LV
R900571979 2FRM16-3X/160LVSO208
R900424907 2FRM16-3X/25L
R978011611 2FRM16-3X/25LBV
R900443812 2FRM16-3X/40L
R900499578 2FRM16-3X/40LSO100
R900485839 2FRM16-3X/40LB
R900423271 2FRM16-3X/60L
R900473263 2FRM16-3X/60LSO100
R900469562 2FRM16-3X/60LSO130
R900583939 2FRM16-3X/60LSO70
R900424903 2FRM16-3X/60LB
R900470226 2FRM16-3X/60LBSO130
R900411046 2FRM16-3X/60LBJ
R900335911 2FRM16-3X/60LBJSO168
R900428280 2FRM16-3X/60LBV
R900498326 2FRM16-3X/60LJ
R900335894 2FRM16-3X/60LJSO198
R900424904 2FRM16-3X/60LV
R900437666 2FRM16-3X/60QB
R900463262 2FRM16-3X/80L
R900468913 2FRM16-3X/80LB
R900361497 2FRM16-3X/80LBSO169
R900414597 2FRM16-3X/80LJ
R900993373 2FRM16-3X=100L=PL
R900081196 2FRM16-3X=100LB=PL
R901411199 2FRM16-3X=125LB
R900072937 2FRM16-3X=160L=PL
R901266648 2FRM16-3X=160LBV
R900080634 2FRM16-3X=60LB=PL
R900755435 2FRM16-7-3X/100L
R900770290 2FRM16-7-3X/100LV
R900744248 2FRM16-7-3X/160L
R900779565 2FRM16-7-3X/160LB
R978878880 2FRM10-3X/10LSO43A-1107
R978877468 2FRM10-3X/10LBVSO43A-1107
R978869471 2FRM10-3X/16LSO43A-1107
R978869224 2FRM10-3X/25LSO43A-1107
R987436857 2FRM10-3X/25LV-SO47-170
R978870441 2FRM10-3X/50LSO43A-1107
R978879217 2FRM10-3X/50LSO43A-307
R978898448 2FRM10-3X/50LVSO43A-307
R978019012 2FRM16-3X/160LBVSO43A-1434
R978907222 2FRM16-3X/60LSO43A-162
力士樂(lè)REXROTH二通流量控制閥2FRH
R900436002 2FRH10-3X/25L/5
R900436003 2FRH16-3X/100L/5
R900424882 2FRH10-3X/10L
R900424885 2FRH10-3X/10LB
R900499611 2FRH10-3X/10LBP
R900082048 2FRH10-3X/10LBPSO124
R900495779 2FRH10-3X/10LBV
R900474173 2FRH10-3X/10LP
R900401325 2FRH10-3X/10LPSO124
R900442127 2FRH10-3X/10LV
R900424886 2FRH10-3X/16L
R900430262 2FRH10-3X/16LB
R900563562 2FRH10-3X/16LBP
R900440611 2FRH10-3X/16LBV
R900374686 2FRH10-3X/16LV
R900448633 2FRH10-3X/16Q
R900424883 2FRH10-3X/25L
R900438841 2FRH10-3X/25LB
R900464204 2FRH10-3X/25LBP
R900337143 2FRH10-3X/25LV
R900350553 2FRH10-3X/2Q
R900427185 2FRH10-3X/50L
R900424884 2FRH10-3X/50LB
R900465491 2FRH10-3X/50LBP
R900474644 2FRH10-3X/50LBV
R900401386 2FRH10-3X/50LP
R900491712 2FRH10-3X/50LV
R900447409 2FRH10-3X/5L
R900427186 2FRH16-3X/100L
R900429484 2FRH16-3X/100LB
R900581915 2FRH16-3X/100LBSO1
R900441405 2FRH16-3X/100LBF
R900476610 2FRH16-3X/100LBP
R900426852 2FRH16-3X/100LV
R900428043 2FRH16-3X/160L
R900361789 2FRH16-3X/160LSO450
R900422490 2FRH16-3X/160LB
R900465634 2FRH16-3X/160LBSO178
R900597756 2FRH16-3X/160LBSO231
R900461075 2FRH16-3X/160LBF
R900472592 2FRH16-3X/160LBP
R900443251 2FRH16-3X/160LBV
R900381435 2FRH16-3X/160LP
R900479913 2FRH16-3X/160LPSO178
R900359566 2FRH16-3X/160LPSO215
R900442466 2FRH16-3X/160LV
R900427376 2FRH16-3X/60L
R900538520 2FRH16-3X/60LSO110
R900481096 2FRH16-3X/60LB
R900440972 2FRH16-3X/60LF
R900355620 2FRH16-3X/60LP
R900486476 2FRH16-3X/60LV
力士樂(lè)REXROTH雙向流量控制閥2FRW
R900467815 2FRW10-3X/10L5AJW110-50NZ4
R900469360 2FRW10-3X/10L5AJW220-50NZ4
R900460418 2FRW10-3X/10L5ANG24NZ4
R900488906 2FRW10-3X/10L5ANG24NZ4SO99
R900470814 2FRW10-3X/10L5ANW110-50NZ4
R900376183 2FRW10-3X/10L5ANW110-50NZ4SO99
R900405862 2FRW10-3X/10L5ANW120-60NZ4SO99
R900470986 2FRW10-3X/10L5ANW220-50NZ4
R900414605 2FRW10-3X/10L5ANW220-50NZ4SO9
R900351616 2FRW10-3X/10L5ANW220-50NZ4SO99
R900335498 2FRW10-3X/10L5AYG24NZ4
R900463352 2FRW10-3X/10LB5AJW220-50NZ4
R900462291 2FRW10-3X/10LB5ANG24NZ4
R900349650 2FRW10-3X/10LB6AYG24NEX
R900335539 2FRW10-3X/10LP5AJG24Z5L
R900406070 2FRW10-3X/16L5AEW110-50NZ4
R900464669 2FRW10-3X/16L5AJG24NZ4
R900470193 2FRW10-3X/16L5AJG24NZ5L
R900405900 2FRW10-3X/16L5AJW110-50NZ4
R900470359 2FRW10-3X/16L5AJW220-50NZ4
R900479128 2FRW10-3X/16L5AJW220-50Z4
R900360470 2FRW10-3X/16L5AJW220-60NZ4
R900463912 2FRW10-3X/16L5ANG12NZ4
R900467925 2FRW10-3X/16L5ANG24NZ4
R900464974 2FRW10-3X/16L5ANW110-50NZ4
R900462854 2FRW10-3X/16L5ANW220-50NZ4
R900415869 2FRW10-3X/16L5ANW220-60NZ4
R900464422 2FRW10-3X/16LB5AJG24NZ4
R900469354 2FRW10-3X/16LB5AJG24NZ5L
R900473265 2FRW10-3X/16LB5AJW220-50NZ4
R900460419 2FRW10-3X/16LB5ANG24NZ4
R900474128 2FRW10-3X/16LB5ANW110-50NZ4
R900468282 2FRW10-3X/16LB5ANW220-50NZ4
R900471905 2FRW10-3X/16LB6AJG24NEX
R900468148 2FRW10-3X/16LBP5AJG24NZ4
R900368567 2FRW10-3X/20L5ANW220-50NZ4SO64
R900378909 2FRW10-3X/20L5ANW220-50Z4SO64
R900460427 2FRW10-3X/25L5AJG24NZ4
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液壓是機(jī)械行業(yè)、機(jī)電行業(yè)的一個(gè)名詞。液壓可以用動(dòng)力傳動(dòng)方式， 成為液壓傳動(dòng)。液壓也可用作控制方式，稱為液壓控制。
液壓傳動(dòng)是以液體作為工作介質(zhì)，利用液體的壓力能來(lái)傳遞動(dòng)力。
液壓控制是以有壓力液體作為控制信號(hào)傳遞方式的控制。用液壓技術(shù)構(gòu)成的控制系統(tǒng)稱為液壓控制系統(tǒng)。液壓挖制通常包括液壓開(kāi)環(huán)挖制和液壓閉環(huán)控制。液壓閉環(huán)挖制也就是液壓伺服控制，它構(gòu)成液壓伺服系統(tǒng)，通常包括電氣液壓伺服系統(tǒng)(電液伺服系統(tǒng))和機(jī)械液壓同服系統(tǒng)(機(jī)液伺服系統(tǒng)，或機(jī)液伺服機(jī)構(gòu))等。
一個(gè)完整的液壓系統(tǒng)由五個(gè)部分組成，即能源裝置、執(zhí)行裝置、控制調(diào)節(jié)裝置、輔助裝置、液體介質(zhì)。液壓由于其傳遞動(dòng)力大，易于傳遞及配置等特點(diǎn)，在工業(yè)、民用行業(yè)應(yīng)用廣泛。液壓系統(tǒng)的執(zhí)行元件(液壓缸和液壓馬達(dá))的作用是將液體的壓力能轉(zhuǎn)換為機(jī)械能，從而獲
得需要的直線往復(fù)運(yùn)動(dòng)或回轉(zhuǎn)運(yùn)動(dòng)。液壓系統(tǒng)的能源裝置(液壓泵)的作用是將原動(dòng)機(jī)的機(jī)械能轉(zhuǎn)換成液體的壓力能。
液壓系統(tǒng)組成
一個(gè)完整的液壓系統(tǒng)由五個(gè)部分組成，即動(dòng)力元件、執(zhí)行元件、控制元件、輔助元件和工作介質(zhì)。
動(dòng)力元件的作用是將原動(dòng)機(jī)的機(jī)械能轉(zhuǎn)換成液體的壓力能。動(dòng)力元件指液壓系統(tǒng)中的液壓泵，它向整個(gè)液壓系統(tǒng)提供動(dòng)力。液壓泵的結(jié)構(gòu)形式一般有齒輪泵、葉片泵、柱塞泵、螺桿泵。
執(zhí)行元件的作用是將液體的壓力能轉(zhuǎn)換為機(jī)械能，驅(qū)動(dòng)負(fù)載作直線往復(fù)運(yùn)動(dòng)或回轉(zhuǎn)運(yùn)動(dòng)。執(zhí)行元件有液壓缸和液壓馬達(dá)。
挖制元件(即各種液壓閥)在液壓系統(tǒng)中控制和調(diào)節(jié)液體的壓力、流量和方向。

根據(jù)控制功能的不同，液壓閥可分為壓力控制閥、流量挖制閥和方向控制閥。壓力挖制閥又分為溢流閥(安全閥)、減壓閥、順序閥、壓力繼電器等:流量控制閥包括節(jié)流閥、調(diào)整閥、分流集流閥等:方向控制閥包括單向閥、液挖單向閥、梭閥、換向閥等。根據(jù)控制方式不同，
液壓閥可分為開(kāi)關(guān)式控制閥、定值控制閥和比例控制閥。
輔助元件包括蓄能器、過(guò)濾器、冷卻器、加熱器、油管、管接頭、油箱、壓力計(jì)、流量計(jì)、
密封裝置等，它們起連接、儲(chǔ)油、過(guò)濾和測(cè)量油液壓力等輔助作用
工作介質(zhì)是指各類液壓傳動(dòng)中的液壓油或乳化液，有各種礦物油、乳化液和合成型液壓油等
幾大類。液壓系統(tǒng)就是通過(guò)其實(shí)現(xiàn)運(yùn)動(dòng)和動(dòng)力傳遞的。
液壓元件可分為動(dòng)力元件和挖制元件以及執(zhí)行元件三大類。盡管都是液壓元件，它們的自身
功能和安裝使用的技術(shù)要求也不盡相同，現(xiàn)分別介紹如下:
動(dòng)力元件:指的是各種液壓泵，齒輪泵、葉片泵、柱塞泵、螺桿泵。
1、齒輪油泵和串聯(lián)泵(包括外嚙合與內(nèi)嚙合)兩種結(jié)構(gòu)型式。
2、葉片油泵(包括單級(jí)泵、變量泵、雙級(jí)泵、雙聯(lián)泵)。
3、柱塞油泵，又分為軸向柱塞油泵和徑向柱塞油泵，軸向柱塞泵有定量泵、變量泵、(變量泵又分為手動(dòng)變量與壓力補(bǔ)償變量、伺服變量等多種)從結(jié)構(gòu)上又分為端面配油和閥式配油兩種配油方式，而徑向柱塞泵的配油型式，基本上為閥式配油。);
執(zhí)行元件:液壓缸和液壓馬達(dá)，液壓缸有活塞液壓缸、柱塞液壓缸、擺動(dòng)液壓缸、組合液壓缸:液壓馬達(dá)有齒輪式液壓馬達(dá)、葉片液壓馬達(dá)、柱塞液壓馬達(dá):
控制元件:方向控制閥、單向閥、換向閥;
壓力控制閥:溢流閥、減壓閥、順序閥、壓力繼電器等:
流量控制閥:節(jié)流閥、調(diào)速閥、分流闕:
輔助元件:除上述三部分以外的其它元件，包括壓力表、濾油器、蓄能裝置、冷卻器、管件{主要包括:各種管接頭 (擴(kuò)口式、 焊接式、卡套式，sae法蘭)、高壓球閥、快換接頭、軟管總成、測(cè)壓接頭、管夾等}及油箱等，它們同樣十分重要。

優(yōu)點(diǎn)
與機(jī)械傳動(dòng)、電氣傳動(dòng)相比，液壓傳動(dòng)具有以下優(yōu)點(diǎn):
1、液壓傳動(dòng)的各種元件，可以根據(jù)需要方便、靈活地來(lái)布置。
2、重量輕、體積小、運(yùn)動(dòng)慣性小、反應(yīng)速度快[2] 
3、操縱控制方便，可實(shí)現(xiàn)大范圍的無(wú)級(jí)調(diào)速(調(diào)速范圍達(dá)2000: 1)。
4、可自動(dòng)實(shí)現(xiàn)過(guò)載保護(hù)。
5、一般采用礦物油作為工作介質(zhì)，相對(duì)運(yùn)動(dòng)面可自行潤(rùn)滑，使用壽命長(zhǎng)。
6、很容易實(shí)現(xiàn)直線運(yùn)動(dòng)。
7、很容易實(shí)現(xiàn)機(jī)器的自動(dòng)化，當(dāng)采用電液聯(lián)合控制后，不僅可實(shí)現(xiàn)更高程度的自動(dòng)控制過(guò)程，而且可以實(shí)現(xiàn)遙控。