4WRPEH6C3B12L-2X/G24K0/A1M

4WRPEH6C3B12L-2X/G24K0/A1M

產(chǎn)品簡介：

閥對流量的控制可以分為兩種:

一種是開關(guān)控制:要么全開、要么全關(guān)，流量要么最大、要么最小，沒有中間狀態(tài)，如普通的電磁直通閥、電磁換向閥、電液換向閥。

另一種是連續(xù)控制:閥口可以根據(jù)需要打開任意一個開度，由此控制通過流量的大小，這類閥有手動控制的，如節(jié)流閥，也有電控的，如比例閥、伺服閥。

力士樂液壓部分系列型號：

R902453052 AA10VO28DRG/52R-VSC64N00-S2110
R902549362 AA10VO28DRG/53R-VPC12N00
R902422818 AA10VO28DFLR/52R-VSC12H00*UNGUEL***
R902426903 AA10VO28DFLR/53R-VSC12H00-S1978
R902406949 AA10VO28ED71/52L-PSC62N00P
R902455665 AA10VO28ED71/52R-VRC12K01P
R902455664 AA10VO28ED71/52R-VRC12K68P
R902411249 AA10VO28ED72/5*UNGUEL***0T-S1126
R902416721 AA10VO28ED72/52L-PSC12N00H
R902417233 AA10VO28ED72/52L-PSC12N00T-SO702
R902417288 AA10VO28ED72/52L-PSC61N00T
R902433654 AA10VO28ED72/52L-PSC64N00T
R902455016 AA10VO28ED72/52L-VCC11N00P
R902447229 AA10VO28ED72/52L-VRC12K68P
R902490963 AA10VO28ED72/52L-VRC12N00H
R902453853 AA10VO28ED72/52L-VSC11N00P
R902424683 AA10VO28ED72/52L-VSC11N00P-S1457
R902428367 AA10VO28ED72/52L-VSC12K01T
R902418486 AA10VO28ED72/52L-VSC12N00*UNGUEL***
R902476645 AA10VO28ED72/52L-VSC12N00H
R902447230 AA10VO28ED72/52L-VSC12N00PE
R902428357 AA10VO28ED72/52L-VSC12N00P-SO702
R902411726 AA10VO28ED72/52L-VSC12N00T-S1126
R902455401 AA10VO28ED72/52L-VSC61N00P
R902427115 AA10VO28ED72/52L-VSC62N00H
R902406060 AA10VO28ED72/52L-VSC62N00T
R902429951 AA10VO28ED72/52R-PSC61N00T
R902468960 AA10VO28ED72/52R-VCC11N00P-S1457
R902471040 AA10VO28ED72/52R-VCC11N00P-S2110
R902472130 AA10VO28ED72/52R-VCC12N00P-S1457
R902439471 AA10VO28ED72/52R-VRC12K68P-SO965
R992000791 AA10VO28ED72/52R-VRC12K68P-SO965
R902453687 AA10VO28ED72/52R-VRC12N00H
R902450584 AA10VO28ED72/52R-VRC12N00P
R902450395 AA10VO28ED72/52R-VRC12N00P-SO965
R902501669 AA10VO28ED72/52R-VSC11N00P-S1457
R902513603 AA10VO28ED72/52R-VSC11N00P-S4208
R902531482 AA10VO28ED72/52R-VSC11N00P-S4112
R902497963 AA10VO28ED72/52R-VSC11N00P-S2492
R902444702 AA10VO28ED72/52R-VSC11N00T
R902444053 AA10VO28ED72/52R-VSC12K01P
R902444619 AA10VO28ED72/52R-VSC12K68H
R902443778 AA10VO28ED72/52R-VSC12K68P
R902439955 AA10VO28ED72/52R-VSC12K68P-S1948
R902412395 AA10VO28ED72/52R-VSC12K68T-S1694
R902448190 AA10VO28ED72/52R-VSC12N00HE
R902439956 AA10VO28ED72/52R-VSC12N00P-S1948
R902438153 AA10VO28ED72/52R-VSC12N00P-S2070
R902416798 AA10VO28ED72/52R-VSC12N00T
R902412351 AA10VO28ED72/52R-VSC12N00T-S1126
R902415121 AA10VO28ED72/52R-VSC12N00T-S1318
R902449605 AA10VO28ED72/52R-VSC12N00T-S2084
R902422850 AA10VO28ED72/52R-VSC12N00T-S2377
R902444711 AA10VO28ED72/52R-VSC61N00TE
R902450573 AA10VO28ED72/52R-VSC62K01P
R902439348 AA10VO28ED72/52R-VSC62N00P
R902406663 AA10VO28ED72/52R-VSC64N00P
R902513408 AA10VO28ED72/52R-VTC12K68P-SO200
R902451242 AA10VO28ED72/52R-VTC12N00T
R902463047 AA10VO28ED72/53R-VSC12N00P-SO97
R902420142 AA10VO28ED73/52L-VSC11N00P
R902465637 AA10VO28ED73/52L-VSC11N00P-S2492
R902454332 AA10VO28ED73/52L-VSC11N00T
R902420282 AA10VO28ED73/52L-VSC11N00T-SO262
R902423974 AA10VO28ED73/52R-PSC62N00P
R902435629 AA10VO28ED73/52R-PSC62N00PE
R902421597 AA10VO28ED73/52R-PSC62N00T
R902455047 AA10VO28ED73/52R-VSC12N00P
R902452887 AA10VO28ED73/52R-VSC12N00P-S2192
R902423723 AA10VO28ED73/52R-VXXXXN00T*G*-S1520
R902449779 AA10VO28ED74/52R-VSC11N00P-SO925
R902468275 AA10VO28EP1D/53R-VRC12K01P
R902453612 AA10VO28EP1D/53R-VSC12K01P
R902439957 AA10VO28EP2D/53R-VTC12K68*UNGUEL***
R902555794 AA10VO28ER72/52L-VSC12K01P
R902483714 AA10VO28LA6DS/53R-VSC11N00
R902443430 AA10VO28LA6DS/53R-VSC62N00
R902475120 AA10VO28LA7DS/53R-VSC11N00
R902450801 AA10VO28LA7DS/53R-VSC12N00-S2111
R902453962 AA10VO28LA7DS/53R-VSC12N00-S2287
R902455225 AA10VO28LA7DS/53R-VSC62N00-SO928
R902447250 AA10VO28LA8DS/53R-VSC12H00-S2033
R902447507 AA10VO28LA8DS/53R-VSC12H00-S2035
R902449950 AA10VO28LA8DS/53R-VSC62N00-S1902
R902455226 AA10VO28LA8DS/53R-VSC62N00-SO928
R902455458 AA10VO28LA9DS/53R-VSC11N00-S2270
R902406951 AA10VO28LA9DS/53R-VSC62N00-SO928
R902429513 AA10VO28LRDS/53R-VSC12H00*G*-S1605
R902443622 AA10VO28LRDS/53R-VSC12H00*G*-S1605
R902464091 AA10VO32DFR1/52R-VUC11N00-S2504
R910972377 AA10VO45DFR/52L-PCC12N00
R902427894 AA10VO45DFR/52L-PCC12N00-S1530
R902429475 AA10VO45DFR/52L-PCC12N00-SO481
R902400076 AA10VO45DFR/52L-PKC62K04
R910984073 AA10VO45DFR/52L-PKC62N00
R910976281 AA10VO45DFR/52L-PKC64N00
R902401426 AA10VO45DFR/52L-PRC61N00
R902401053 AA10VO45DFR/52L-PRC62K04
R902406546 AA10VO45DFR/52L-PRC62K52
R902401263 AA10VO45DFR/52L-PRC62K68
R910966198 AA10VO45DFR/52L-PSC11N00
R902427153 AA10VO45DFR/52L-PSC11N00-SO547
R910974040 AA10VO45DFR/52L-PSC12N00
R910975255 AA10VO45DFR/52L-PSC61N00
R902401268 AA10VO45DFR/52L-PSC62K01
R902433138 AA10VO45DFR/52L-PSC62K02
R902401086 AA10VO45DFR/52L-PSC62K04
R902416100 AA10VO45DFR/52L-PSC62K04-SO607
R910975256 AA10VO45DFR/52L-PSC62K68
R902403845 AA10VO45DFR/52L-PSC62N00
R902416092 AA10VO45DFR/52L-PSC62N00-SO607
R910972815 AA10VO45DFR/52L-PSC64N00
R910973764 AA10VO45DFR/52L-PUC11N00
R910986466 AA10VO45DFR/52L-PUC12N00
R910975493 AA10VO45DFR/52L-PUC61N00
R902401131 AA10VO45DFR/52L-PUC62K52
R902406537 AA10VO45DFR/52L-PUC62K68
R902400111 AA10VO45DFR/52L-PUC62N00
R910970020 AA10VO45DFR/52L-PUC64N00
R910986457 AA10VO45DFR/52L-PUC64N00-SO547
R902435388 AA10VO45DFR/52L-PUC64N00E
R902437371 AA10VO45DFR/52L-PWC12K01
R902406048 AA10VO45DFR/52L-PWC62K01
R902480136 AA10VO45DFR/52L-VKC11N00
R902453155 AA10VO45DFR/52L-VRC12N00
R902428461 AA10VO45DFR/52L-VSC11N00
R902404331 AA10VO45DFR/52L-VSC12K01-SO547
R902408739 AA10VO45DFR/52L-VSC12KA2
R902484286 AA10VO45DFR/52L-VSC12N00
R902410519 AA10VO45DFR/52L-VSC12N00-S1195
R902453618 AA10VO45DFR/52L-VSC12N00-SO724
R902456051 AA10VO45DFR/52L-VSC12N00E
R902451962 AA10VO45DFR/52L-VSC62N00E
R910983817 AA10VO45DFR/52L-VUC11N00-SO607
R910987608 AA10VO45DFR/52L-VUC11N00-SO746
R902451427 AA10VO45DFR/52L-VUC12N00
R902434888 AA10VO45DFR/52L-VUC12N00-S1195
R902412161 AA10VO45DFR/52L-VUC13N00
R902453952 AA10VO45DFR/52L-VUC13N00-SO481
R902419826 AA10VO45DFR/52L-VWC11N00
R902453066 AA10VO45DFR/52L-VWC12N00
R902428334 AA10VO45DFR/52R-PKC12G60
R902400110 AA10VO45DFR/52R-PKC61N00
R910976282 AA10VO45DFR/52R-PKC64N00
R902542593 AA10VO45DFR/52R-PKC64N00
R902401054 AA10VO45DFR/52R-PKC64N00-SO97
R902406004 AA10VO45DFR/52R-PRC62K04
R902406662 AA10VO45DFR/52R-PRC62K68
R902501010 AA10VO45DFR/52R-PRC62K68-SO854
R910983819 AA10VO45DFR/52R-PSC11N00
R902427151 AA10VO45DFR/52R-PSC11N00-SO547
R902429541 AA10VO45DFR/52R-PSC12G50-SO547
R902432068 AA10VO45DFR/52R-PSC12G77
R902413391 AA10VO45DFR/52R-PSC12K01
R902415030 AA10VO45DFR/52R-PSC12K01-SO97
R902433519 AA10VO45DFR/52R-PSC12K01E
R902418635 AA10VO45DFR/52R-PSC12K04-SO547
R902411138 AA10VO45DFR/52R-PSC12K68
R910986132 AA10VO45DFR/52R-PSC12N00
R910999923 AA10VO45DFR/52R-PSC12N00-SO116
R910997054 AA10VO45DFR/52R-PSC12N00-SO547
R910998531 AA10VO45DFR/52R-PSC12N00-SO779
R910990157 AA10VO45DFR/52R-PSC61N00
R910992754 AA10VO45DFR/52R-PSC61N00-SO547
R902433687 AA10VO45DFR/52R-PSC62K02
R910985638 AA10VO45DFR/52R-PSC62K04
R902400109 AA10VO45DFR/52R-PSC62K68
R902400300 AA10VO45DFR/52R-PSC62N00
R902401252 AA10VO45DFR/52R-PSC62N00-SO97
R902406102 AA10VO45DFR/52R-PSC62N00-SO607
R910970014 AA10VO45DFR/52R-PSC64N00
R910978797 AA10VO45DFR/52R-PUC11N00
R902431634 AA10VO45DFR/52R-PUC12N00-S1137
R910986465 AA10VO45DFR/52R-PUC12N00-SO649
R910992522 AA10VO45DFR/52R-PUC61N00
R902400030 AA10VO45DFR/52R-PUC62K68
R902400003 AA10VO45DFR/52R-PUC62N00
R902401047 AA10VO45DFR/52R-PUC62N00-SO794
R910970025 AA10VO45DFR/52R-PUC64N00
R902534907 AA10VO45DFR/52R-PUC64N00
R902409443 AA10VO45DFR/52R-PUC64N00-S1137
R902402462 AA10VO45DFR/52R-PUC64N00-SO97
R902400042 AA10VO45DFR/52R-PUC64N00-SO481
R902401256 AA10VO45DFR/52R-PUC64N00-SO547
R902401001 AA10VO45DFR/52R-PUC64N00-SO794
R902400204 AA10VO45DFR/52R-PUC64N00-SO854
R902438994 AA10VO45DFR/52R-PUC64N00E
R902450826 AA10VO45DFR/52R-VKC11N00
R902406092 AA10VO45DFR/52R-VKC62K04-SO97
R902406858 AA10VO45DFR/52R-VRC62K04-SO607
R902416305 AA10VO45DFR/52R-VSC11N00
R902454862 AA10VO45DFR/52R-VSC12K01-S2153
R902453350 AA10VO45DFR/52R-VSC12K01-SO547
R902439346 AA10VO45DFR/52R-VSC12K68
R902463659 AA10VO45DFR/52R-VSC12N00
R902404875 AA10VO45DFR/52R-VSC12N00-S1097
R902407534 AA10VO45DFR/52R-VSC12N00-S1133
R902463309 AA10VO45DFR/52R-VSC12N00-S2436
R902437904 AA10VO45DFR/52R-VSC12N00-SO724
R910996343 AA10VO45DFR/52R-VSC12N00-SO905
R902400179 AA10VO45DFR/52R-VSC61N00
R902435955 AA10VO45DFR/52R-VSC62K01
R902400149 AA10VO45DFR/52R-VSC62N00
R902504660 AA10VO45DFR/52R-VSC62N00*GO2*
R902406093 AA10VO45DFR/52R-VSC62N00-SO97
R902401405 AA10VO45DFR/52R-VSC64N00
R910987738 AA10VO45DFR/52R-VUC11N00-SO607
R910987560 AA10VO45DFR/52R-VUC12N00
R902401118 AA10VO45DFR/52R-VUC62N00
R902504662 AA10VO45DFR/52R-VUC62N00*GO2*
R902453415 AA10VO45DFR/52R-VUC64N00-S1137
R902429226 AA10VO45DFR/52R-VUC64N00-S1195
R902418703 AA10VO45DFR/52R-VWC11N00
R902550698 AA10VO45DFR/52R-VWC12K01
R902504663 AA10VO45DFR1/52R-VSC62N00*GO2*
R902433460 AA10VO45DFR1/*UNGUEL***00-S1791
R902539738 AA10VO45DFR1/50R-VWC12N00-SO627
R902417251 AA10VO45DFR1/52L-PCC11N00-S1352
R910986254 AA10VO45DFR1/52L-PCC12N00
R910984153 AA10VO45DFR1/52L-PKC64N00
R902406186 AA10VO45DFR1/52L-PKC64N00-SO381
R910974737 AA10VO45DFR1/52L-PRC12K04-SO407
R910995790 AA10VO45DFR1/52L-PRC12K04-SO702
R902406649 AA10VO45DFR1/52L-PRC61N00
R902427901 AA10VO45DFR1/52L-PRC62G80
R902400475 AA10VO45DFR1/52L-PRC62K04
R910972157 AA10VO45DFR1/52L-PSC11N00
R902415544 AA10VO45DFR1/52L-PSC11N00-S1313
R902429040 AA10VO45DFR1/52L-PSC11N00-S1683
R910974797 AA10VO45DFR1/52L-PSC11N00-SO407
R902407807 AA10VO45DFR1/52L-PSC11N00-SO547
R902411841 AA10VO45DFR1/52L-PSC11N00-SO702
R910985918 AA10VO45DFR1/52L-PSC11N00-SO717
R902414036 AA10VO45DFR1/52L-PSC11N00*UNGUEL***
R902429047 AA10VO45DFR1/52L-PSC12G60
R902444899 AA10VO45DFR1/52L-PSC12L40-SO413
R910979536 AA10VO45DFR1/52L-PSC12N00
R902406942 AA10VO45DFR1/52L-PSC12N00-S1702
R910996192 AA10VO45DFR1/52L-PSC12N00-SO547
R910996596 AA10VO45DFR1/52L-PSC12N00-SO694
R910985405 AA10VO45DFR1/52L-PSC12N00-SO702
R910998015 AA10VO45DFR1/52L-PSC12N00-SO937
R902435318 AA10VO45DFR1/52L-PSC12N00E
R910983571 AA10VO45DFR1/52L-PSC61N00
R902400262 AA10VO45DFR1/52L-PSC62K01
R902428214 AA10VO45DFR1/52L-PSC62K52-S1658
R902406708 AA10VO45DFR1/52L-PSC62K68-SO547
R902437894 AA10VO45DFR1/52L-PSC62N00
R902400341 AA10VO45DFR1/52L-PSC62N00
R902400383 AA10VO45DFR1/52L-PSC62N00*UNGUEL***
R910966170 AA10VO45DFR1/52L-PSC64N00
R910978580 AA10VO45DFR1/52L-PSC64N00-SO97
R902428397 AA10VO45DFR1/52L-PSC64N00-SO547
R910975945 AA10VO45DFR1/52L-PSC64N00-SO614
R902418841 AA10VO45DFR1/52L-PUC11N00-S1352
R902420956 AA10VO45DFR1/52L-PUC11N00-S1447
R902427258 AA10VO45DFR1/52L-PUC11N00-S1625
R910989851 AA10VO45DFR1/52L-PUC11N00-S3726
R902412996 AA10VO45DFR1/52L-PUC12G30
R910971974 AA10VO45DFR1/52L-PUC12N00
R902433396 AA10VO45DFR1/52L-PUC13N00-SO710
R910979954 AA10VO45DFR1/52L-PUC61N00
R902437462 AA10VO45DFR1/52L-PUC61N00E
R902401380 AA10VO45DFR1/52L-PUC62N00
R910970024 AA10VO45DFR1/52L-PUC64N00
R902400002 AA10VO45DFR1/52L-PUC64N00-SO97
R902400172 AA10VO45DFR1/52L-PUC64N00-SO547
R902401057 AA10VO45DFR1/52L-PWC62K01
R902406837 AA10VO45DFR1/52L-VCC11N00-S2172
R902453621 AA10VO45DFR1/52L-VCC11N00-S2208
R910990935 AA10VO45DFR1/52L-VRC12K04-SO804
R902420413 AA10VO45DFR1/52L-VRC62K68
R902406192 AA10VO45DFR1/52L-VRC62K68-ESO973
R902483112 AA10VO45DFR1/52L-VSC11N00
R902416276 AA10VO45DFR1/52L-VSC11N00-S1507
R902443905 AA10VO45DFR1/52L-VSC11N00-S2054
R902454161 AA10VO45DFR1/52L-VSC11N00-S2219
R902411087 AA10VO45DFR1/52L-VSC11N00-SO710
R910990941 AA10VO45DFR1/52L-VSC11N00-SO804
R902433925 AA10VO45DFR1/52L-VSC12H00-S3974
R902413717 AA10VO45DFR1/52L-VSC12K01
R902540397 AA10VO45DFR1/52L-VSC12K01
R902419805 AA10VO45DFR1/52L-VSC12K04
R902425209 AA10VO45DFR1/52L-VSC12K68-S1213
R910975052 AA10VO45DFR1/52L-VSC12K68-S1487
R902447840 AA10VO45DFR1/52L-VSC12K68-S2053
R992000825 AA10VO45DFR1/52L-VSC12K68-S2053
R902403212 AA10VO45DFR1/52L-VSC12K68-SO702
R902455217 AA10VO45DFR1/52L-VSC12K68-SO794
R902414239 AA10VO45DFR1/52L-VSC12KA2
R910988986 AA10VO45DFR1/52L-VSC12N00
R902402502 AA10VO45DFR1/52L-VSC12N00-S1021
R902404200 AA10VO45DFR1/52L-VSC12N00-S1025
R902444617 AA10VO45DFR1/52L-VSC12N00-S1213
R902430084 AA10VO45DFR1/52L-VSC12N00-S1388
R902448308 AA10VO45DFR1/52L-VSC12N00-S2053
R902455549 AA10VO45DFR1/52L-VSC12N00-S2226
R902454667 AA10VO45DFR1/52L-VSC12N00-S2318
R902416921 AA10VO45DFR1/52L-VSC12N00-SO702
R910994554 AA10VO45DFR1/52L-VSC12N00-SO905
R902451551 AA10VO45DFR1/52L-VSCXXH00-S1640
R902550839 AA10VO45DFR1/52L-VUC11N00
R902454059 AA10VO45DFR1/52L-VUC11N00-S1038
R902409974 AA10VO45DFR1/52L-VUC11N00-S1172
R902419986 AA10VO45DFR1/52L-VUC11N00-S1418
R902420955 AA10VO45DFR1/52L-VUC11N00-S1446
R902420958 AA10VO45DFR1/52L-VUC11N00-S1449

所以使用比例閥或伺服閥的目的就是:以電控方式實現(xiàn)對流量的節(jié)流控制(當然經(jīng)過結(jié)構(gòu)上的改動也可實現(xiàn)壓力控制等)，既然是節(jié)流控制，就必然有能量損失，伺服閥和其它閥不同的是，它的能量損失更大一些，因為它需要一定的流量來維持前置級控制油路的工作。

基本信息
中文名稱
比例閥

外文名稱
Proportional valve

 
作用
控制油液的流量和方向

結(jié)構(gòu)
滑閥

目錄
1滑閥結(jié)構(gòu)
2區(qū)別
3延伸資料
滑閥結(jié)構(gòu)
伺服閥的主閥一般來說和換向閥一樣是滑閥結(jié)構(gòu)，只不過閥芯的換向不是靠電磁鐵來推動，而是靠前置級閥輸出的液壓力來推動，這一點和電液換向閥比較相似，只不過電液換向閥的前置級閥是電磁換向閥，而伺服閥的前置級閥是動態(tài)特性比較好的噴嘴擋板閥或射流管閥。

也就是說，伺服閥的主閥是靠前置級閥的輸出壓力來控制的，而前置級閥的壓力則來自于伺服閥的入口p，假如p口的壓力不足，前置級閥就不能輸出足夠的壓力來推動主閥芯動作。

而我們知道，當負載為零的時候，如果四通滑閥完全打開，p口壓力=t口壓力+閥口壓力損失(忽略油路上的其它壓力損失)，如果閥口壓力損失很小，t口壓力又為零，那么p口的壓力就不足以供給前置級閥來推動主閥芯，整個伺服閥就失效了。所以伺服閥的閥口做得偏小，即使在閥口全開的情況下，也要有一定的壓力損失，來維持前置級閥的正常工作。

伺服閥其實缺點極多:能耗浪費大、容易出故障、抗污染能力差、價格昂貴等等等等，好處只有一個:動態(tài)性能是所有液壓閥中最高的。就憑著這一個優(yōu)點，在很多對動態(tài)特性要求高的場合不得不使用伺服閥，如飛機火箭的舵機控制、汽輪機調(diào)速等等。動態(tài)要求低一點的，基本上都是比例閥的天下了。

一般說來，好像伺服系統(tǒng)都是閉環(huán)控制，比例閥多用于開環(huán)控制;其次比例閥類型要多，有比例壓力、流量控制閥等，控制比伺服要靈活一些。從他們內(nèi)部結(jié)構(gòu)看，伺服閥多是零遮蓋，比例閥則有一定的死區(qū)，控制精度要低，響應要慢。但從發(fā)展趨勢看，特別在比例方向流量控制閥和伺服閥方面，兩者性能差別逐漸在縮小，另外比例閥的成本比伺服閥要低許多，抗污染能力也強!

區(qū)別
伺服閥與比例閥的區(qū)別

伺服閥與比例閥之間的差別并沒有嚴格的規(guī)定，因為比例閥的性能越來越好，逐漸向伺服閥靠近，所以近些年出現(xiàn)了比例伺服閥。

比例閥和伺服閥的區(qū)別主要體現(xiàn)在以下幾點:

1.驅(qū)動裝置不同。比例閥的驅(qū)動裝置是比例電磁鐵;伺服閥的驅(qū)動裝置是力馬達或力矩馬達;

2.性能參數(shù)不同。滯環(huán)、中位死區(qū)、頻寬、過濾精度等特性不同，因此應用場合不同，伺服閥和伺服比例閥主要應用在閉環(huán)控制系統(tǒng)，其它結(jié)構(gòu)的比例閥主要應用在開環(huán)控系統(tǒng)及閉環(huán)速度控制系統(tǒng);

2.1 伺服閥中位沒有死區(qū)，比例閥有中位死區(qū);

2.2 伺服閥的頻響(響應頻率)更高，可以高達200Hz左右，比例閥一般最高幾十Hz;

2.3 伺服閥對液壓油液的要求更高，需要經(jīng)過濾才行，否則容易堵塞，比例閥要求低一些;

3.閥芯結(jié)構(gòu)及加工精度不同。比例閥采用閥芯+閥體結(jié)構(gòu)，閥體兼作閥套。伺服閥和伺服比例閥采用閥芯+閥套的結(jié)構(gòu)。

4.中位機能種類不同。比例換向閥具有與普通換向閥相似的中位機能，而伺服閥中位機能只有O型(Rexroth產(chǎn)品的E型)。

5.閥的額定壓降不同。

而比例伺服閥性能介于伺服閥和比例閥之間。

比例換向閥屬于比例閥的一種，用來控制流量和流向。

延伸資料
---電氣比例閥

自動控制可分成斷續(xù)控制和連續(xù)控制。斷續(xù)控制即開關(guān)控制。氣動控制系統(tǒng)中使用動作頻率較低的開關(guān)式(ON-OFF)的換向閥來控制氣路的通斷?？繙p壓閥來調(diào)節(jié)所需要的壓力，靠節(jié)流閥來調(diào)節(jié)所需要的流量。這種傳統(tǒng)的氣動控制系統(tǒng)要想要有多個輸出力和多個運動速度，就需要多個減壓閥、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)復雜，且許多元件都需要預先進行人工調(diào)節(jié)。電氣比例閥控制屬于連續(xù)控制，其特點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。

結(jié)構(gòu)原理

輸入信號增大，供氣用電磁閥先導閥1換向，而排氣用電磁先導閥7處于復位狀態(tài)，則供氣壓力從SUP口通過閥1進入先導室5，先導室壓力上升，氣壓力作用在膜片2的上方，則和膜片2相連的供氣閥芯4便開啟，排氣閥芯3關(guān)閉，產(chǎn)生輸出壓力。此輸出壓力通過壓力傳感器6反饋至控制回路8。在這里，與目標值進行快速比較修正，知道輸出壓力與輸入信號成一定比例為止，從而得到輸出壓力與輸入信號的變化成比例的變化。由于沒有噴嘴擋板機構(gòu)，故閥對雜質(zhì)不敏感，可靠性高。

特點

1)可實現(xiàn)壓力、速度的無極調(diào)節(jié)，避免了常通的開關(guān)式氣閥換向時的沖擊現(xiàn)象。

2)能實現(xiàn)遠程控制和程序控制。

3)與斷續(xù)控制相比，系統(tǒng)簡化，元件大大減少。

4)與液壓比例閥相比，體積小、重量輕、結(jié)構(gòu)簡單、成本較低，但響應速度比液壓系統(tǒng)慢得多，對負載變化也比較敏感。

5)使用功率小、發(fā)熱少、噪聲低。

6)不會發(fā)生火災，不污染環(huán)境。受溫度變化的影響小。

公司簡介：
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