德國Rexroth二級比例方向閥4WRKE用于控制液壓油的流向和流量。主級是受位置控制的，這樣，控制閥芯位置在流量較大的情況下也不會受液動力的影響。力士樂4WRKE型先導(dǎo)式比例方向閥zui大工作壓力350bar和zui大流量3000 l/min。 力士樂4WRKE型比例方向閥的特征：二級閥主要由比例閥的各個組件組成。"主級零電位"的零電位調(diào)節(jié)是工廠預(yù)設(shè)的，可以通過控制電子元件中的電位計，在公稱行程的±30%范圍內(nèi)進行調(diào)節(jié)。拆下閥體前面的塞螺釘后，方可對集成控制電子元件進行檢修。必須重新調(diào)節(jié)更換后的先導(dǎo)控制閥或控制電子元件。全部調(diào)節(jié)工作只能由的專業(yè)人員執(zhí)行。 相當于普通開環(huán)比例換向閥，力士樂4WRKE型比例方向閥可實現(xiàn)自身的閉環(huán)控制，故對于液流的大范圍突然變化不敏感，不會因作用在閥芯上的液動力而導(dǎo)致閥芯失控。這種閥同時還擁有比較好的頻率響應(yīng)特性（頻率響應(yīng)可達數(shù)十赫茲），特別適用于在設(shè)備的緊湊性加減速變換運動中對預(yù)緩沖有較高要求的場合。相對于伺服閥，此種閥的主級和先導(dǎo)級均采用滑閥結(jié)構(gòu)，對油液清潔度不是很敏感，價格也便宜。閥的死區(qū)，增益，顫振和偏置等已在工廠內(nèi)按標準閥調(diào)整并封裝，故可維護性好，拆裝方便，安裝后不用調(diào)校，是一種即裝即用的高性能比例閥，在部分場合可替代伺服閥使用，用于控制液流的開啟、停止、方向。 力士樂4WRKE二級比例方向閥克服了現(xiàn)有產(chǎn)品比例電磁鐵所需推力大、易漏油的缺陷。它包括先導(dǎo)閥和主閥兩個部分；先導(dǎo)閥包括左右比例電磁鐵、閥體、設(shè)于閥體內(nèi)的閥芯；主閥包括主閥體和位于其中的閥芯，其特征在于：所述的先導(dǎo)閥閥體內(nèi)設(shè)一橫向油道，其兩端連接左右比例電磁鐵頂桿油腔，該油道中部設(shè)有回油孔，進入左右比例電磁鐵頂桿油腔的端口均設(shè)阻尼螺釘；主閥體的控制油口經(jīng)閥體內(nèi)的油道與先導(dǎo)閥閥體中部設(shè)的控制油道相通，該油道止路于先導(dǎo)閥閥體兩個環(huán)形沉割槽，先導(dǎo)閥芯的二個臺肩上均設(shè)有節(jié)流窗口。本實用新型結(jié)構(gòu)新穎、比例電磁鐵所需推力小、密封要求低，有利于提高使用壽命、降低生產(chǎn)成本，可廣泛應(yīng)用于塑機行業(yè)及機械加工設(shè)備的液壓控制系統(tǒng)中。 力士樂產(chǎn)品型號很多，不能一一列舉，以下是Rexroth二級比例方向閥4WRKE的部分常用型號： 4WRKE35E1-1000L-3X/6EG24EK31/A1D3V,R901100929
4WRKE35E1-1000L-3X/6EG24K31/F1D3V,R901052827
4WRKE35E1000L-3X/6EG24K31/A1D3M-905,R901132836
4WRKE35E1000L-3X/6EG24EK31/A1D3V,R901211507
4WRKE35E1000L-3X/6EG24K31/A1D3V,R901102529
4WRKE35R3-1000L-3X/6EG24K31/A1D3M,R901160858
4WRKE35R3-1000L-3X/6EG24K31/F1D3M,R901183466
4WRKE35E1-1000L-3X/6EG24ETK31/A5D3M,R900718331
4WRKE35E1-1000L-3X/6EG24K31/A5D3M,R901093110
4WRKE35E1-1000L-3X/6EG24K31/A5D3M-280,R900756658
4WRKE35W8-1000L-3X/6EG24ETK31/A5D3M,R900759331
4WRKE35W8-1000L-3X/6EG24K31/A5D3M,R900704404
4WRKE35W6-1000P-3X/6EG24EK31/C1D3M,R901242289
4WRKE35E1-1000L-3X/6EG24EK31/A1D3M,R901025013
4WRKE35E1-1000L-3X/6EG24K31/A1D3M,R901033705
4WRKE35E1-1000L-3X/6EG24K31/A1D3M-280,R901018298
4WRKE35E1-1000L-3X/6EG24K31/C1D3M,R901231227
4WRKE35W8-1000L-3X/6EG24EK31/A1D3M,R901054883
4WRKE35W8-1000L-3X/6EG24EK31/F1D3M,R901127413
4WRKE35W8-1000L-3X/6EG24ETK31/F1D3M,R901160961
4WRKE35W8-1000L-3X/6EG24K31/F1D3M,R901176133
4WRKE35W6-1000P-3X/6EG24K31/F1D3M,R901227838
4WRKE35E1000L-3X/6EG24EK31/C1D3M,R900762781
4WRKE35W6-1000L-3X/6EG24K31/C1D3M,R901240438
4WRKE35E1000L-3X/6EG24K31/A5D3M,R900726602
4WRKE35W6-1000L-3X/6EG24K31/A5D3M,R900715082
4WRKE35E1000L-3X/6EG24ETK31/A1D3M,R900717029
4WRKE35E1000L-3X/6EG24K31/A1D3M,R900773355
4WRKE35E1000L-3X/6EG24K31/A1D3M-280,R901024647
4WRKE35E1000L-3X/6EG24K31/C1D3M,R901177187
4WRKE35W6-1000L-3X/6EG24EK31/A1D3M,R901094074
4WRKE35W6-1000L-3X/6EG24EK31/F1D3M,R901263621
4WRKE35W6-1000L-3X/6EG24ETK31/A1D3M,R900717030
4WRKE35W6-1000L-3X/6EG24K31/F1D3M,R900773088
4WRKE32E1-600L-3X/6EG24EK31/A1D3V,R901268348
4WRKE32W8-600L-3X/6EG24K31/A1D3V,R901056252
4WRKE32E3-600L-3X/6EG24EK31/A5D3M-280,R900749131
4WRKE32W6-600P-3X/6EG24EK31/F1D3V,R901047149
4WRKE32E3-400L-3X/6EG24K31/F1D3M,R901224967
4WRKE32E3-600L-3X/6EG24K31/F1D3M,R901213323
4WRKE32R3-400L-3X/6EG24K31/A1D3M,R901201718
4WRKE32R3-400L-3X/6EG24K31/F1D3M,R901183869
4WRKE32R3-600L-3X/6EG24K31/F1D3M,R901183870
4WRKE32E600L-3X/6EG24K31/A1D3V,R900739618
4WRKE32W6-600L-3X/6EG24ETK31/F1D3V,R901153481
4WRKE32W6-600L-3X/6EG24K31/A1D3V,R901238441
4WRKE32W8-600P-3X/6EG24K31/A5D3M,R900721885
4WRKE32E1-600P-3X/6EG24K31/A1D3M,R901100916
4WRKE32W8-600P-3X/6EG24K31/F1D3M,R901167507
4WRKE32W8-600L-3X/6EG24K31/C1D3M,R901299712
4WRKE32E1-600L-3X/6EG24EK31/A5D3M-280,R900716436
4WRKE32E1-600L-3X/6EG24K31/A5D3M,R900753006
4WRKE32E1-600L-3X/6EG24K31/A5D3M-280,R900711650
4WRKE32W8-600L-3X/6EG24EK31/A5D3M,R900747304
4WRKE32W8-600L-3X/6EG24ETK31/A5D3M,R901014199
4WRKE32W8-600L-3X/6EG24K31/A5D3M,R900704403
4WRKE32E1-600L-3X/6EG24EK31/A1D3M,R901117336
4WRKE32E1-600L-3X/6EG24K31/A1D3M,R901102982
4WRKE32E1-600L-3X/6EG24K31/A1D3M-280,R901089781
4WRKE32E1-600L-3X/6EG24K31/C1D3M,R901231200
4WRKE32E1-600L-3X/6EG24K31/F1D3M,R901141349
4WRKE32W8-400L-3X/6EG24EK31/A1D3M,R901107424
4WRKE32W8-400L-3X/6EG24EK31/F1D3M,R901121949
4WRKE32W8-600L-3X/6EG24EK31/A1D3M,R901090623
4WRKE32W8-600L-3X/6EG24EK31/F1D3M,R901093095
4WRKE32W8-600L-3X/6EG24ETK31/F1D3M,R901055130
4WRKE32W8-600L-3X/6EG24K31/A1D3M,R901023120
4WRKE32W8-600L-3X/6EG24K31/F1D3M,R900709134
4WRKE32E400S-3X/6EG24ETK31/A5D3M,R900743960
4WRKE32W6-600P-3X/6EG24EK31/A5D3M,R900740749
4WRKE32W6-600P-3X/6EG24EK31/A5D3M-280,R901096192
4WRKE32W6-600P-3X/6EG24K31/A1D3M-280,R901184378
4WRKE32W6-600P-3X/6EG24EK31/A1D3M,R901026641
4WRKE32W6-600P-3X/6EG24EK31/C1D3M,R901011230
4WRKE32E400L-3X/6EG24K31/A5D3M-280,R901119343
4WRKE32E600L-3X/6EG24EK31/A5D3M,R900717062
4WRKE32E600L-3X/6EG24EK31/A5D3M-280,R900762393
4WRKE32E600L-3X/6EG24ETK31/A5D3M,R900712050
4WRKE32E600L-3X/6EG24K31/A5D3M,R900713637
4WRKE32E600L-3X/6EG24K31/A5D3M-280,R900713635
4WRKE32E600L-3X/6EG24TK31/A5D3M,R901067075
4WRKE32W6-400L-3X/6EG24EK31/A5D3M,R900773692
4WRKE32W6-600L-3X/6EG24K31/A5D3M,R900721875
4WRKE32E400L-3X/6EG24K31/A1D3M,R901190018
4WRKE32E600L-3X/6EG24EK31/A1D3M,R901033473
4WRKE32E600L-3X/6EG24EK31/A1D3M-280,R901018297
4WRKE32E600L-3X/6EG24ETK31/A1D3M,R901016496
4WRKE32E600L-3X/6EG24K31/A1D3M,R900734062
4WRKE32E600L-3X/6EG24K31/A1D3M-280,R900249917
4WRKE32E600L-3X/6EG24K31/C1D3M,R900712759
4WRKE32E600L-3X/6EG24K31/F1D3M,R900245364
4WRKE32W6-400L-3X/6EG24EK31/F1D3M,R901122589
4WRKE32W6-400L-3X/6EG24K31/A1D3M,R901044433
4WRKE32W6-400L-3X/6EG24K31/F1D3M,R901117295
4WRKE32W6-600L-3X/6EG24EK31/A1D3M,R901088904
4WRKE32W6-600L-3X/6EG24EK31/F1D3M,R901016317
4WRKE32W6-600L-3X/6EG24ETK31/A1D3M,R900249276
4WRKE32W6-600L-3X/6EG24K31/A1D3M,R900780615
4WRKE32W6-600L-3X/6EG24K31/F1D3M,R900762389
4WRKE25R350L-3X/6EG24EK31/A1D3V,R901100919
4WRKE27W4-500L-3X/6EG24K31/A5D3M,R900708992
4WRKE27E1-500L-3X/6EG24EK31/A1D3V,R901268865
4WRKE27E1-500L-3X/6EG24K31/A1D3V,R901079320
4WRKE27W6-500L-3X/6EG24K31/A5D3V,R901050041
4WRKE27E500L-3X/6EG24EK31/A1D3V,R901266055
4WRKE27E500L-3X/6EG24K31/A1D3V,R901077093
4WRKE27E1-500L-3X/6EG24K31/C1D3M,R901229824
4WRKE25W1-350P-3X/6EG24EK31/A5D3M-706,R900709842
4WRKE25E3-350P-3X/6EG24K31/A5D3M,R900784875
4WRKE25E3-350P-3X/6EG24TK31/A5D3M,R901095293
4WRKE27W8-500L-3X/6EG24K31/A5D3M,R900706180
4WRKE25R3-350P-3X/6EG24K31/A1D3M,R900771042
4WRKE27E1-500L-3X/6EG24EK31/A1D3M,R900249274
4WRKE27E1-500L-3X/6EG24EK31/F1D3M,R901296528
4WRKE27E1-500L-3X/6EG24ETK31/A1D3M,R901051417
4WRKE27E1-500L-3X/6EG24K31/A1D3M,R900249923
4WRKE27W8-500L-3X/6EG24EK31/A1D3M,R900701429
4WRKE27W8-500L-3X/6EG24EK31/F1D3M,R901097952
4WRKE27W8-500L-3X/6EG24ETK31/A1D3M,R901199286
4WRKE27W8-500L-3X/6EG24K31/A1D3M,R900750794
4WRKE27W8-500L-3X/6EG24K31/F1D3M,R901072883
4WRKE25R3-350L-3X/6EG24EK31/C1D3M,R901308193
4WRKE27E500P-3X/6EG24ETK31/A1D3M,R901210319
4WRKE25E3-350L-3X/6EG24EK31/A5D3M,R900746579
4WRKE25E3-350L-3X/6EG24K31/A5D3M,R900977507
4WRKE25R350L-3X/6EG24K31/A5D3M,R901026399
4WRKE25W3-350L-3X/6EG24K31/A5D3M,R900768941
4WRKE25E350P-3X/6EG24K31/A5D3V,R901291595
4WRKE27E500L-3X/6EG24EK31/A5D3M,R901025115
4WRKE27E500L-3X/6EG24K31/A5D3M,R901135347
4WRKE27W6-500L-3X/6EG24EK31/A5D3M,R900735040
4WRKE27W6-500L-3X/6EG24K31/A5D3M,R900616821
4WRKE25W8-220L-3X/6EG24EK31/A1D3V,R901006429
4WRKE25W8-350L-3X/6EG24ETK31/F1D3V,R901191330
4WRKE25W8-350L-3X/6EG24K31/A1D3V,R901056249
4WRKE25R3-350L-3X/6EG24K31/A1D3M,R901201717
4WRKE25R350L-3X/6EG24EK31/A1D3M,R901125163
4WRKE25R350L-3X/6EG24EK31/A1D3M-280,R901216124
4WRKE25W9-350L-3X/6EG24K31/A1D3M,R900727368
4WRKE25W6-350P-3X/6EG24EK31/A1D3V,R901268350
4WRKE27E500L-3X/6EG24EK31/A1D3M,R901039097
4WRKE27E500L-3X/6EG24EK31/F1D3M,R901267566
4WRKE27E500L-3X/6EG24K31/C1D3M,R901130165
4WRKE27E500L-3X/6EG24K31/F1D3M,R901133144
4WRKE27W6-500L-3X/6EG24EK31/A1D3M,R901041512
4WRKE27W6-500L-3X/6EG24EK31/F1D3M,R901169415
4WRKE27W6-500L-3X/6EG24ETK31/A1D3M,R901169989
4WRKE27W6-500L-3X/6EG24K31/A1D3M,R900731496
4WRKE27W6-500L-3X/6EG24K31/F1D3M,R901147944
4WRKE25E350L-3X/6EG24K31/A5D3V,R901214428
4WRKE25W6-350L-3X/6EG24K31/A5D3V,R901047568
4WRKE25E1-350P-3X/6EG24EK31/A5D3M,R900713633
4WRKE25E1-350P-3X/6EG24K31/A5D3M,R900787373
4WRKE25W8-350P-3X/6EG24K31/A5D3M,R900709020
4WRKE25E350L-3X/6EG24K31/A1D3V,R901229184
4WRKE25E350L-3X/6EG24K31/F1D3V,R901114885
4WRKE25W6-220L-3X/6EG24K31/A1D3V,R901108789
4WRKE25W6-350L-3X/6EG24K31/A1D3V,R900706551
4WRKE25E1-350P-3X/6EG24EK31/A1D3M,R901072882
4WRKE25W8-350P-3X/6EG24EK31/A1D3M,R901059574
4WRKE25W8-350P-3X/6EG24K31/F1D3M,R901167508
4WRKE25W6-350P-3X/6EG24EK31/C1D3M,R901171085
4WRKE25E1-350L-3X/6EG24EK31/A5D3M,R900977502
4WRKE25E1-350L-3X/6EG24K31/A5D3M,R900704756
4WRKE25W8-220L-3X/6EG24EK31/A5D3M-280,R900713634
4WRKE25W8-350L-3X/6EG24EK31/A5D3M,R900977505
4WRKE25W8-350L-3X/6EG24EK31/A5D3M-280,R900720556
4WRKE25W8-350L-3X/6EG24K31/A5D3M,R900705775
4WRKE25E350P-3X/6EG24EK31/A5D3M,R901108088
4WRKE25E350P-3X/6EG24ETK31/A5D3M,R900710256
4WRKE25E350P-3X/6EG24K31/A5D3M,R900733297
4WRKE25W6-350P-3X/6EG24K31/A5D3M,R900748597
4WRKE25E1-220L-3X/6EG24EK31/A1D3M,R901189931
4WRKE25E1-220L-3X/6EG24EK31/F1D3M,R901297584
4WRKE25E1-220L-3X/6EG24K31/A1D3M,R901001641
4WRKE25E1-220L-3X/6EG24K31/A1D3M-280,R901179163
4WRKE25E1-350L-3X/6EG24EK31/A1D3M,R900772022
4WRKE25E1-350L-3X/6EG24EK31/A1D3M-280,R901075370
4WRKE25E1-350L-3X/6EG24K31/A1D3M,R900973368
4WRKE25E1-350L-3X/6EG24K31/A1D3M-280,R900249919
4WRKE25E1-350L-3X/6EG24K31/C1D3M,R901219179
4WRKE25W8-220L-3X/6EG24EK31/A1D3M,R901038659
4WRKE25W8-220L-3X/6EG24EK31/F1D3M,R900751048
4WRKE25W8-220L-3X/6EG24ETK31/F1D3M,R900766959
4WRKE25W8-220L-3X/6EG24K31/A1D3M,R900721996
4WRKE25W8-220L-3X/6EG24K31/F1D3M,R900711318
4WRKE25W8-350L-3X/6EG24EK31/A1D3M,R900245067
4WRKE25W8-350L-3X/6EG24EK31/F1D3M,R900705057
4WRKE25W8-350L-3X/6EG24ETK31/A1D3M,R900731881
4WRKE25W8-350L-3X/6EG24ETK31/F1D3M,R900743953
4WRKE25W8-350L-3X/6EG24K31/A1D3M,R900249554
4WRKE25W8-350L-3X/6EG24K31/F1D3M,R900979857
4WRKE25E220P-3X/6EG24EK31/A1D3M,R901059570
4WRKE25E350P-3X/6EG24EK31/A1D3M,R900770264
4WRKE25E350P-3X/6EG24ETK31/A1D3M,R901195767
4WRKE25E350P-3X/6EG24K31/A1D3M,R900717614
4WRKE25W6-220P-3X/6EG24ETK31/A1D3M,R901146836
4WRKE25W6-350P-3X/6EG24EK31/A1D3M,R901059573
4WRKE25W6-350P-3X/6EG24EK31/F1D3M,R901066669
4WRKE25W6-350P-3X/6EG24K31/F1D3M,R901047148
4WRKE25E350L-3X/6EG24EK31/C1D3M,R900727103
4WRKE25E350L-3X/6EG24K31/C1D3M,R901252931
4WRKE25W6-350L-3X/6EG24EK31/C1D3M,R901170141
4WRKE25E220L-3X/6EG24K31/A5D3M,R901045426
4WRKE25E350L-3X/6EG24EK31/A5D3M,R900703649
4WRKE25E350L-3X/6EG24EK31/A5D3M-280,R900720557
4WRKE25E350L-3X/6EG24ETK31/A5D3M,R900713823
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4WRKE10W6-25L-3X/6EG24EK31/A1D3M,R901057128
4WRKE10W6-25L-3X/6EG24ETK31/F1D3M,R901202900
4WRKE10W6-25L-3X/6EG24K31/A1D3M,R901131241
4WRKE10W6-50L-3X/6EG24EK31/A1D3M,R900719667
4WRKE10W6-50L-3X/6EG24EK31/F1D3M,R901217997
4WRKE10W6-50L-3X/6EG24ETK31/F1D3M,R900749617
4WRKE10W6-50L-3X/6EG24K31/A1D3M,R900713239
4WRKE10W6-50L-3X/6EG24K31/F1D3M,R900705350
4WRKE16W6A200L-3X/6EG24ETK31/A5D3M,R900704401
4WRKE10W100P-3X/6EG24K31/A5D3M-693=DE,R900246010
4WRKE10W1-100P-3X/6EG24ETK31/A5D3M-706,R900715737
4WRKE10W4-100P-3X/6EG24K31/A5D3M-683,R900718465
4WRKE10W5-100L-3X/6EG24K31/A5D3M-182,R900771222
4WRKE10W5-100P-3X/6EG24K31/A5D3M-683,R900708955
4WRKE16W5-125L-3X/6EG24K31/A5D3M-683,R900977509 德國4WRKE是一種高性能閉環(huán)比例方向閥，通過先導(dǎo)比例閥控制主閥芯的動作，在主閥體上裝有一高精度的電位置反饋器及內(nèi)置放大器，用于閥自身的閉環(huán)控制，可對液流的方向及流量進行成比例的精確控制。但在使用中也暴露出一些問題，如果不能引起高度的重視，可能會嚴重制約設(shè)備的穩(wěn)定運行，縮短使用壽命，增加維護費用。 |
