力士樂REXROTH比例閥4WRD系列
    REXROTH比例閥有兩個(gè)腔,分別裝有活塞和閥門,閥門兩端有兩個(gè)腔,其中右腔和進(jìn)油口相通,井通過(guò)油管與主缸出油口相連；左腔與出油口相通,并通過(guò)管路和后輪制動(dòng)管路相連。比例閥的工作原理如下：在不制動(dòng)時(shí),活塞在感載彈簧通過(guò)杠桿施加的推力F的作用下,處于左端極限位置,這時(shí)閥門離開閥座打開,使輸入輸出油路相通。
    Rexroth比例閥利用車身與車橋之間的距離變化（外界作用力）來(lái)改變彈簧的預(yù)緊力，隨著車輛載荷的增加，相應(yīng)地進(jìn)行調(diào)整，使得在任何載荷條件下都能得到一個(gè)近似理想的制動(dòng)力分配。它安裝在制動(dòng)總泵與后輪制動(dòng)分泵之間的管道上，由殼體、柱塞、閥門、彈簧等組成。殼體進(jìn)油孔與制動(dòng)總泵出油孔相通，出油孔與車輪制動(dòng)分泵相通。當(dāng)外界作用力小時(shí)，感載比例閥的柱塞在彈簧預(yù)緊力的作用下被推至zui右邊，兩孔相通，總泵與分泵壓力相等。當(dāng)外界作用力大于彈簧預(yù)緊力，迫使柱塞左移，令柱塞與閥門接觸并關(guān)閉了閥門，切斷總泵通向分泵的通道；若外界作用力壓力繼續(xù)增大，又會(huì)使柱塞右移，柱塞與閥門脫離接觸，閥門又被打開，總泵與分泵又相通。這樣比例閥反復(fù)動(dòng)作使分泵的液壓不斷得到調(diào)整，也即不斷調(diào)整了后輪制動(dòng)力。比例閥來(lái)調(diào)節(jié)所需要的流量。這種傳統(tǒng)的氣動(dòng)控制系統(tǒng)要想要有多個(gè)輸出力和多個(gè)運(yùn)動(dòng)速度，就需要多個(gè)減壓閥、節(jié)流閥及換向閥。這樣，不僅元件需要多，成本高，構(gòu)成系統(tǒng)復(fù)雜，且許多元件都需要預(yù)良好行人工調(diào)節(jié)。電氣比例閥控制屬于連續(xù)控制，其特點(diǎn)是輸出量隨輸入量的變化而變化，輸出量與輸入量之間存在一定的比例關(guān)系。比例控制有開環(huán)控制和閉環(huán)控制之分。
    力士樂4WRD...XN 型閥是一種通過(guò)電磁鐵操縱的 3 檔式調(diào)節(jié)方向閥。它適用于在對(duì)動(dòng)態(tài)和靈敏度方面有較高要求的情況下調(diào)節(jié)位置、速度、壓力以及力。它適用于指令 94/9/EC 規(guī)定的有爆炸危險(xiǎn)的場(chǎng)所。
    德國(guó)REXROTH比例閥型號(hào)
    R901160405 4WRDE16V1-125L-5X/6L24TK9/M-280
    R901147771 4WRDE25E1-220L-5X/6L24K9/M
    R901102032 4WRDE16V1-200L-5X/6L24K9/V
    R901047758 4WRDE25W1-350L-5X/6L24EK9/WG152M
    R901047756 4WRDE10W1-100L-5X/6L24EK9/WG152M
    R900702685 4WRDE16W1-200L-5X/6L24EK9/M
    R900702612 4WRDE25V1-350L-5X/6L24EK9/WG152MR
    R900699276 KOLBEN4WRDE25V350-41/
    R900699274 KOLBEN4WRDE25W350-41/
    R900699270 KOLBEN4WRDE16V200-41/
    R900699269 KOLBEN4WRDE16W200-41/
    R900699266 KOLBEN4WRDE10V100-41/
    R900699265 KOLBEN4WRDE10V50-41/
    R900699262 KOLBEN4WRDE10E100-41/
    R900645078 KOLBEN4WRDE32W1-600-41/
    R900639652 KOLBEN4WRDE16W125-41/
    R900639275 KOLBEN4WRDE25W1/W2-500-41H/
    R900639274 KOLBEN4WRDE25W500-41H/
    R900637940 KOLBEN4WRDE10E1/E2-50-41/
    R900634053 KOLBEN4WRDE16V125-40/
    R900632108 KOLBEN4WRDE10W1/W2-100-40/
    R900629797 KOLBEN4WRDE10E1/E2-100-40/
    R900623685 FEDERLER4WRDE10.-40/
    R900619532 4WRDE25V1-350L-5X/6L24K9/MR
    R900617516 4WRDE16W5-200L-5X/6L24ETK9/WG152MR
    R900555409 4WRDE10V100L-5X/6L15ETK9/MR
    R900545419 GEHAEUSE4WRDE35E1000-41/
    力士樂REXROTH比例閥4WRD系列
    R901135024 4WRDE10V1-50L-5X/6L24K9/MR-280
    R901134300 4WRDE16Q2-200P-5X/6L15K9/WG152MR
    R901132087 4WRDE25V1-350L-5X/6L15K9/VR-280
    R901131864 4WRDE16V125L-5X/6L24ETK9/WG152MR
    R901131452 4WRDE25V350L-5X/6L15EK9/M
    R901130863 4WRDE32V600L-5X/6L24K9/MR-576
    R901130612 4WRDE16V200P-5X/6L24ETK9/MR-280
    R901130572 4WRDE32E400L-5X/6L24EK9/MR
    R901130248 4WRDE10V100S-5X/6L15ETK9/MR
    R901129743 4WRDE32V600L-5X/6L24K9/MR-202
    R901127196 4WRDE16V200P-5X/6L24K9/VR-576
    R901127194 4WRDE10V100P-5X/6L24K9/VR-576
    R901125441 4WRDE25V350L-5X/6L24K9/VR-576
    R901125425 4WRDE16V125L-5X/6L24K9/V-576
    R901122858 4WRDE32V600L-5X/6L24ETK9/MR
    R901121801 4WRDE10V1-50L-5X/6L15K9/VR-280
    R901120775 4WRDE25E3-350P-5X/6L24ETK9/WG152M
    R901118086 4WRDE10V1-50S-5X/6L24K9/WG152MR
    R901117439 4WRDE16E125L-5X/6L15EK9/WG152M
    R901116616 4WRDE32V1-400L-5X/6L24K9/WG152MR
    R901115253 4WRDE16V1-125S-5X/6L24K9/WG152MR
    R901114170 4WRDE32V600L-5X/6L24K9/WG150MR-900
    R901113536 4WRDE10V100R-5X/6L15EK9/MR
    R901112269 4WRDE16W200L-5X/6L24ETK9/MR-280
    R901111031 4WRDE25V220L-5X/6L24K9/M-576
    R901105517 4WRDE25V350L-5X/6L15K9/VR-280
    R901104990 4WRDE32W600L-5X/6L24K9/M
    R901102032 4WRDE16V1-200L-5X/6L24K9/V
    R901098903 4WRDE16W125L-5X/6L24ETK9/WG152M
    R901097831 4WRDE10V50L-5X/6L15EK9/M-280
    R901097630 4WRDE10V25L-5X/6L15K9/VR-280
    R901096430 4WRDE16W200L-5X/6L24K9/WG152M
    R901096284 4WRDE32V600L-5X/6L24K9/VR-881
    R901095834 4WRDE10W1-100L-5X/6L24K9/V
    R901095362 4WRDE25V220L-5X/6L15ETK9/WG152M
    R901095318 4WRDE32W600L-5X/6L24K9/WG152M
    R901094073 4WRDE10V1-100L-5X/6L24K9/V
    R901093985 4WRDE16W200L-5X/6L24EK9/M
    R901092003 4WRDE10V50L-5X/6L24EK9/MR
    R901089060 4WRDE10E50P-5X/6L24K9/MR
    R901085389 4WRDE25V220L-5X=6L15ETK9/WG152M
    R901085388 4WRDE16V125L-5X=6L15ETK9/M
    R901085364 4WRDE16W1-200L-5X/6L24TK9/M
    R901083593 4WRDE25V350P-5X/6L24K9/MR
    力士樂REXROTH比例閥4WRD系列
    R901082785 4WRDE16V125P-5X/6L24TK9/M
    R901079991 4WRDE27W500L-5X/6L24K9/MR-280
    R901079988 4WRDE16W1-125L-5X/6L24K9/MR-280
    R901079986 4WRDE16W1-200L-5X/6L24K9/MR-280
    R901079949 4WRDE25V000S-5X/6L15K9/VR-469
    R901079507 4WRDE25E1-350L-5X/6L24K9/WG152MR
    R901079142 4WRDE27W1-500P-5X/6L24K9/WG152MR
    R901078593 4WRDE16E1-125L-5X/6L24ETK9/WG152MR
    R901078127 4WRDE10V1-100P-5X/6L24TK9/MR
    R901075852 4WRDE25V220L-5X/6L24TK9/WG152M-280
    R901075442 4WRDE16V125L-5X/6L24TK9/M-280
    R901074358 4WRDE16V125L-5X/6L24ETK9/M-280
    R901074350 4WRDE32V400L-5X/6L24K9/MR
    R901072877 4WRDE10V50L-5X/6L24TK9/MR-280
    R901072551 4WRDE16V125L-5X/6L24TK9/V
    R901070226 4WRDE32V400L-5X/6L24K9/WG152MR
    R901068907 4WRDE10V25L-5X/6L24TK9/M
    R901068457 4WRDE25V220L-5X/6L15K9/MR-881
    R901067986 4WRDE32E600L-5X/6L24K9/M
    R901067238 4WRDE16V125L-5X/6L24ETK9/MR
    R901065914 4WRDE10E100L-5X/6L24EK9/M-280
    R901064065 4WRDE27W500L-5X/6L24K9/M
    R901064064 4WRDE16W1-200L-5X/6L24K9/M
    R901064061 4WRDE25V1-350L-5X/6L24K9/M
    R901063828 4WRDE16E1-125L-5X/6L24K9/WG152M
    R901063272 4WRDE10V50L-5X/6L24ETK9/MR-202
    R901062725 4WRDE32V400L-5X/6L24K9/MR-280
    R901061080 4WRDE25V220L-5X/6L24ETK9/M-576
    R901052545 4WRDE16V200L-5X/6L24TK9/MR-280
    R901050179 4WRDE10V1-50L-5X/6L24ETK9/M-280
    R901049339 4WRDE16V1-125L-5X/6L24K9/WG152MR
    R901048599 4WRDE16E125P-5X/6L24ETK9/M-280
    力士樂REXROTH比例閥4WRD系列訂購(gòu)流程如下：
    1、客戶確認(rèn)所需采購(gòu)產(chǎn)品型號(hào)發(fā)詢價(jià)單傳真
    2、我方會(huì)根據(jù)詢價(jià)單型號(hào)查詢價(jià)格以及交貨期，擬一份詳細(xì)正規(guī)報(bào)價(jià)單
    3、客戶收到報(bào)價(jià)單并確認(rèn)型號(hào)無(wú)誤后訂購(gòu)產(chǎn)品
    4、報(bào)價(jià)單負(fù)責(zé)人根據(jù)客戶提供型號(hào)以及數(shù)量擬份銷售合同
    5、客戶收到合同查閱同意后蓋章回傳并按照合同銷售金額匯款到公司開戶行
    6、我公司財(cái)務(wù)查到款后，業(yè)務(wù)員安排發(fā)貨并通知客戶跟蹤運(yùn)單