Rexroth比例換向閥0811404602

Rexroth比例換向閥0811404602

產(chǎn)品簡(jiǎn)介：

閥對(duì)流量的控制可以分為兩種:

一種是開(kāi)關(guān)控制:要么全開(kāi)、要么全關(guān)，流量要么最大、要么最小，沒(méi)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(kāi)任意一個(gè)開(kāi)度，由此控制通過(guò)流量的大小，這類(lèi)閥有手動(dòng)控制的，如節(jié)流閥，也有電控的，如比例閥、伺服閥。

力士樂(lè)液壓部分系列型號(hào)：

R902427256 AA10VO45DFR1/52L-VUC11N00-S1623
R902432857 AA10VO45DFR1/52L-VUC11N00-S1778
R902443022 AA10VO45DFR1/52L-VUC11N00-S1951
R902443827 AA10VO45DFR1/52L-VUC11N00-S1969
R902427542 AA10VO45DFR1/52L-VUC11N00-S2547
R902430958 AA10VO45DFR1/52L-VUC11N00-S3259
R902430960 AA10VO45DFR1/52L-VUC11N00-S3260
R902497668 AA10VO45DFR1/52L-VUC11N00-SO481
R902410940 AA10VO45DFR1/52L-VUC11N00-SO509
R902407672 AA10VO45DFR1/52L-VUC11N00-SO794
R902455719 AA10VO45DFR1/52L-VUC12K01-SO547
R910987857 AA10VO45DFR1/52L-VUC12N00
R902431193 AA10VO45DFR1/52L-VUC13N00
R902417203 AA10VO45DFR1/52L-VUC13N00-SO547
R992000705 AA10VO45DFR1/52L-VUC13N00-SO547
R902464965 AA10VO45DFR1/52L-VUC13N00-SO547
R902503985 AA10VO45DFR1/52L-VUC62K68
R902503524 AA10VO45DFR1/52L-VUC62N00-SO547
R902504262 AA10VO45DFR1/52L-VUC64N00-SO547
R902504396 AA10VO45DFR1/52L-VUC64N00-SO547
R902547985 AA10VO45DFR1/52L-VWC12N00-S2062
R902551195 AA10VO45DFR1/52L-VWC13N00-S2062
R902430388 AA10VO45DFR1/52L-VWC62N00
R902434864 AA10VO45DFR1/52L-VWC62N00-S1038
R910979693 AA10VO45DFR1/52R-PCC61N00
R902448746 AA10VO45DFR1/52R-PKC11N00
R902437981 AA10VO45DFR1/52R-PKC12H00
R902437739 AA10VO45DFR1/52R-PKC12N00
R902400406 AA10VO45DFR1/52R-PKC61N00
R910984154 AA10VO45DFR1/52R-PKC64N00
R902534651 AA10VO45DFR1/52R-PKC64N00-S3956
R902431315 AA10VO45DFR1/52R-PRC12H00-SO779
R910995966 AA10VO45DFR1/52R-PRC12K04-SO702
R902430380 AA10VO45DFR1/52R-PRC12N00
R902406005 AA10VO45DFR1/52R-PRC62K04
R902401166 AA10VO45DFR1/52R-PRC62K68
R910998359 AA10VO45DFR1/52R-PSC11N00
R902411839 AA10VO45DFR1/52R-PSC11N00-S1509
R910972744 AA10VO45DFR1/52R-PSC11N00-SO116
R910975960 AA10VO45DFR1/52R-PSC11N00-SO615
R902430106 AA10VO45DFR1/52R-PSC12G30
R902433241 AA10VO45DFR1/52R-PSC12G30
R902438944 AA10VO45DFR1/52R-PSC12H00
R910990288 AA10VO45DFR1/52R-PSC12K01-SO116
R902429831 AA10VO45DFR1/52R-PSC12K01-SO200
R902446284 AA10VO45DFR1/52R-PSC12K01E
R902435624 AA10VO45DFR1/52R-PSC12K01ESO200
R902416690 AA10VO45DFR1/52R-PSC12K04
R902427850 AA10VO45DFR1/52R-PSC12K04-S1543
R910985752 AA10VO45DFR1/52R-PSC12K52
R910992423 AA10VO45DFR1/52R-PSC12K68
R902407129 AA10VO45DFR1/52R-PSC12K68-SO973
R910997106 AA10VO45DFR1/52R-PSC12N00
R902423768 AA10VO45DFR1/52R-PSC12N00-S1518
R902411798 AA10VO45DFR1/52R-PSC12N00-SO116
R902434345 AA10VO45DFR1/52R-PSC12N00-SO547
R910995914 AA10VO45DFR1/52R-PSC12N00-SO702
R902435326 AA10VO45DFR1/52R-PSC12N00E
R902434294 AA10VO45DFR1/52R-PSC12N00E
R902437310 AA10VO45DFR1/52R-PSC12N00ES4101
R902433520 AA10VO45DFR1/52R-PSC12N00ESO116
R910975491 AA10VO45DFR1/52R-PSC61N00
R902423206 AA10VO45DFR1/52R-PSC61N00-S1487
R902408932 AA10VO45DFR1/52R-PSC61N00-SO97
R910995018 AA10VO45DFR1/52R-PSC61N00-SO547
R902427931 AA10VO45DFR1/52R-PSC62K01
R902426055 AA10VO45DFR1/52R-PSC62K02
R902400465 AA10VO45DFR1/52R-PSC62K04
R902401356 AA10VO45DFR1/52R-PSC62K68
R910985626 AA10VO45DFR1/52R-PSC62N00
R910966718 AA10VO45DFR1/52R-PSC64N00
R902400067 AA10VO45DFR1/52R-PSC64N00-SO97
R910972300 AA10VO45DFR1/52R-PSC64N00-SO229
R902428396 AA10VO45DFR1/52R-PSC64N00-SO547
R902411950 AA10VO45DFR1/52R-PSC64N00-SO747
R910978802 AA10VO45DFR1/52R-PUC11N00
R902443457 AA10VO45DFR1/52R-PUC11N00E
R910971912 AA10VO45DFR1/52R-PUC12N00
R902404541 AA10VO45DFR1/52R-PUC12N00-S1089
R902422744 AA10VO45DFR1/52R-PUC12N00-S1349
R910983883 AA10VO45DFR1/52R-PUC12N00-SO607
R910979944 AA10VO45DFR1/52R-PUC12N00-SO649
R910996601 AA10VO45DFR1/52R-PUC12N00-SO937
R910978932 AA10VO45DFR1/52R-PUC12N00*UNGUEL***
R910970240 AA10VO45DFR1/52R-PUC12N00*UNGUEL***
R910974596 AA10VO45DFR1/52R-PUC61N00
R902423207 AA10VO45DFR1/52R-PUC61N00-S1487
R902400014 AA10VO45DFR1/52R-PUC62K68
R902400418 AA10VO45DFR1/52R-PUC62N00
R902400038 AA10VO45DFR1/52R-PUC62N00-S2364
R902400171 AA10VO45DFR1/52R-PUC62N00-SO794
R910970022 AA10VO45DFR1/52R-PUC64N00
R902544706 AA10VO45DFR1/52R-PUC64N00
R910966197 AA10VO45DFR1/52R-PUC64N00-SO277
R902401297 AA10VO45DFR1/52R-PUC64N00-SO381
R902427675 AA10VO45DFR1/52R-PUC64N00-SO547
R910979647 AA10VO45DFR1/52R-PUC64N00-SO638
R902400092 AA10VO45DFR1/52R-PUC64N00-SO854
R902420655 AA10VO45DFR1/52R-PWC11N00-S1519
R910997556 AA10VO45DFR1/52R-PWC11N00-SO710
R902400841 AA10VO45DFR1/52R-PWC12N00
R902410931 AA10VO45DFR1/52R-VCC73N00-S1191
R902419983 AA10VO45DFR1/52R-VCC73N00-S1419
R902420550 AA10VO45DFR1/52R-VCC73N00-S1430
R902427240 AA10VO45DFR1/52R-VCC73N00-S1624
R902443825 AA10VO45DFR1/52R-VCC73N00-S1966
R902450558 AA10VO45DFR1/52R-VKC11N00-S1008
R902496400 AA10VO45DFR1/52R-VKC12K01
R902496199 AA10VO45DFR1/52R-VRC12K04
R902554668 AA10VO45DFR1/52R-VRC12K52
R902436089 AA10VO45DFR1/52R-VRC62K68
R902464728 AA10VO45DFR1/52R-VSC11N00
R902443977 AA10VO45DFR1/52R-VSC11N00-S1008
R902539735 AA10VO45DFR1/52R-VSC11N00-S2359
R902468234 AA10VO45DFR1/52R-VSC11N00-S4986
R902460858 AA10VO45DFR1/52R-VSC12G75
R902413332 AA10VO45DFR1/52R-VSC12K01
R902435332 AA10VO45DFR1/52R-VSC12K01E
R902540903 AA10VO45DFR1/52R-VSC12K01*GO2EU*
R902451240 AA10VO45DFR1/52R-VSC12K04
R910999102 AA10VO45DFR1/52R-VSC12K52-S1022
R902411731 AA10VO45DFR1/52R-VSC12K52-S1237
R910999017 AA10VO45DFR1/52R-VSC12K52-SO973
R902464314 AA10VO45DFR1/52R-VSC12K68
R902411923 AA10VO45DFR1/52R-VSC12K68-S1652
R902404767 AA10VO45DFR1/52R-VSC12N00
R902410368 AA10VO45DFR1/52R-VSC12N00-S1190
R902436559 AA10VO45DFR1/52R-VSC12N00-S1388
R902405400 AA10VO45DFR1/52R-VSC12N00-SO547
R902449610 AA10VO45DFR1/52R-VSC62N00
R902451891 AA10VO45DFR1/52R-VSC64N00
R902502738 AA10VO45DFR1/52R-VSC64N00*GO2*
R902454140 AA10VO45DFR1/52R-VSC64N00-S2053
R910989824 AA10VO45DFR1/52R-VSC64N00-SO481
R986110386 AA10VO45DFR1/52R-VSC64N00-SO481
R902451015 AA10VO45DFR1/52R-VUC11N00-S1631
R902496187 AA10VO45DFR1/52R-VUC11N00-S3562
R902484264 AA10VO45DFR1/52R-VUC11N00-SO547
R902402758 AA10VO45DFR1/52R-VUC11N00-SO794
R902482407 AA10VO45DFR1/52R-VUC12K01
R902491512 AA10VO45DFR1/52R-VUC12K68
R902461412 AA10VO45DFR1/52R-VUC12N00
R910987848 AA10VO45DFR1/52R-VUC12N00-SO749
R902451459 AA10VO45DFR1/52R-VUC61N00
R902504664 AA10VO45DFR1/52R-VUC62N00*GO2*
R902406826 AA10VO45DFR1/52R-VUC62N00-SO547
R902504365 AA10VO45DFR1/52R-VUC64N00
R910997093 AA10VO45DFR1/52R-VWC11N00
R902539737 AA10VO45DFR1/52R-VWC11N00-S2359
R902543719 AA10VO45DFR1/52R-VWC11N00-S4577
R902548161 AA10VO45DFR1/52R-VWC11N00-S4718
R902539736 AA10VO45DFR1/52R-VWC11N00-S4983
R902539770 AA10VO45DFR1/52R-VWC11N00-S4984
R902492655 AA10VO45DFR1/52R-VWC12KC1
R902408980 AA10VO45DFR1/52W-PSC11N00-S1157
R902429357 AA10VO45DFR1/52W-PUC11N00*UNGUEL***
R902429900 AA10VO45DFR1/52W-PUC45N00-SO724
R992000747 AA10VO45DFR1/52W-PUC45N00-SO724
R902430702 AA10VO45DFR1/52WX-VSC95N000-SO481
R902420774 AA10VO45DFR1/52WX-VSC95N000-SO481
R902443613 AA10VO45DFR5/52R-PSC11N00-S2062
R902460418 AA10VO45DFR5/52R-PSC11N00-S2359
R902439915 AA10VO45DFR5/52R-PWC11N00-S1519
R902439914 AA10VO45DFR5/52R-PWC11N00-SO710
R902439913 AA10VO45DFR5/52R-PWC12N00-SO627
R992000793 AA10VO45DFR5/52R-PWC12N00-SO627
R902406006 AA10VO45DR/52L-PRC62K04
R902419149 AA10VO45DR/52L-PSC11N00
R902414595 AA10VO45DR/52L-PSC12N00
R902406007 AA10VO45DR/52L-PSC61N00
R902404999 AA10VO45DR/52L-PSC62K01
R902400311 AA10VO45DR/52L-PSC62N00
R910984529 AA10VO45DR/52L-PSC64N00
R910984547 AA10VO45DR/52L-PSC64N00-SO638
R910985212 AA10VO45DR/52L-PUC11N00
R910979194 AA10VO45DR/52L-PUC12N00
R902400044 AA10VO45DR/52L-PUC61N00
R902400102 AA10VO45DR/52L-PUC62K68
R910979225 AA10VO45DR/52L-PUC62N00
R910983597 AA10VO45DR/52L-PUC64N00
R902401257 AA10VO45DR/52L-PUC64N00-SO97
R910994845 AA10VO45DR/52L-VSC11N00-SO794
R902400159 AA10VO45DR/52L-VSC61N00
R902434377 AA10VO45DR/52L-VUC12N00
R902449247 AA10VO45DR/52R-PKC12N00
R902406008 AA10VO45DR/52R-PRC62K04
R902437603 AA10VO45DR/52R-PSC12K01*UNGUEL***
R902437431 AA10VO45DR/52R-PSC12K01*UNGUEL***
R902405853 AA10VO45DR/52R-PSC12K02
R910994075 AA10VO45DR/52R-PSC12K02-SO97
R910989140 AA10VO45DR/52R-PSC12N00
R902405343 AA10VO45DR/52R-PSC12N00-SO607
R902430578 AA10VO45DR/52R-PSC12N00-SO779
R902406009 AA10VO45DR/52R-PSC61N00
R902425312 AA10VO45DR/52R-PSC62K01
R902407432 AA10VO45DR/52R-PSC62K02
R910986341 AA10VO45DR/52R-PSC62K04-SO97
R902426054 AA10VO45DR/52R-PSC62N00
R910986342 AA10VO45DR/52R-PSC62N00-SO97
R910985580 AA10VO45DR/52R-PSC62N00-SO710
R902400322 AA10VO45DR/52R-PSC64N00
R902422939 AA10VO45DR/52R-PSC64N00-S1494
R910997671 AA10VO45DR/52R-PUC11N00-SO710
R910975501 AA10VO45DR/52R-PUC61N00
R902438321 AA10VO45DR/52R-PUC62K68
R902401292 AA10VO45DR/52R-PUC62K68-SO779
R910972850 AA10VO45DR/52R-PUC64N00
R902452041 AA10VO45DR/52R-VCC62H00-S2059
R902449194 AA10VO45DR/52R-VCC62K52-S2059
R902465512 AA10VO45DR/52R-VRC62K68-S1530
R902465529 AA10VO45DR/52R-VRC62K68-S2488
R902402828 AA10VO45DR/52R-VSC11N00
R902437574 AA10VO45DR/52R-VSC11N00E
R902418954 AA10VO45DR/52R-VSC12K04
R902560553 AA10VO45DR/52R-VSC12K68
R902404461 AA10VO45DR/52R-VSC62N00
R910998499 AA10VO45DR/52R-VSC62N00-SO710
R902454243 AA10VO45DR/52R-VUC11N00
R910994265 AA10VO45DR/52R-VUC12N00-S1124
R902400017 AA10VO45DR/52R-VUC64N00
R902506261 AA10VO45DR/52R-VWC12K01
R902436642 AA10VO45DR/52W-PUC45N000-S1863
R902452036 AA10VO45DR1/52R-VCC62H00-S2059
R902431425 AA10VO45DR1/52R-VSC62N00-S1764
R902406581 AA10VO45DRG/52L-PKC62N00
R902400270 AA10VO45DRG/52L-PKC64N00
R910983881 AA10VO45DRG/52L-PRC12K02
R902406010 AA10VO45DRG/52L-PRC62K04
R910976869 AA10VO45DRG/52L-PSC11N00
R902401736 AA10VO45DRG/52L-PSC12K02-SO97
R910976902 AA10VO45DRG/52L-PSC12K68
R910972964 AA10VO45DRG/52L-PSC12N00-SO547
R902434907 AA10VO45DRG/52L-PSC12N00-SO702
R910975616 AA10VO45DRG/52L-PSC61N00
R910975671 AA10VO45DRG/52L-PSC62K68
R902401404 AA10VO45DRG/52L-PSC62N00
R902406011 AA10VO45DRG/52L-PSC64N00
R902409545 AA10VO45DRG/52L-PUC12N00
R902400242 AA10VO45DRG/52L-PUC64N00
R902400095 AA10VO45DRG/52L-PUC64N00-SO97
R902409992 AA10VO45DRG/52L-VSC11N00-S1171
R902402755 AA10VO45DRG/52L-VSC11N00-SO794
R910986383 AA10VO45DRG/52L-VSC61N00
R902400027 AA10VO45DRG/52L-VUC11N00
R910989040 AA10VO45DRG/52L-VUC11N00-S1407
R910989041 AA10VO45DRG/52L-VUC11N00-S1408
R902423992 AA10VO45DRG/52L-VUC11N00-S1528
R902450559 AA10VO45DRG/52L-VUC12N00
R902400252 AA10VO45DRG/52R-PKC64N00
R902406012 AA10VO45DRG/52R-PRC62K04
R910994852 AA10VO45DRG/52R-PSC12K02-SO97
R902433487 AA10VO45DRG/52R-PSC12K68-S1050
R902413464 AA10VO45DRG/52R-PSC12K68-SO710
R910996832 AA10VO45DRG/52R-PSC12N00
R910983637 AA10VO45DRG/52R-PSC61N00
R902400055 AA10VO45DRG/52R-PSC62K68
R902406013 AA10VO45DRG/52R-PSC62N00
R902436359 AA10VO45DRG/52R-PSC62N00-S1859
R902401284 AA10VO45DRG/52R-PSC62N00-SO710
R902400271 AA10VO45DRG/52R-PSC64N00
R902402890 AA10VO45DRG/52R-PUC11N00-S1038
R902420469 AA10VO45DRG/52R-PUC11N00-S1427
R902403422 AA10VO45DRG/52R-PUC12N00
R902401359 AA10VO45DRG/52R-PUC61N00-SO97
R902401295 AA10VO45DRG/52R-PUC62K68-SO779
R902444973 AA10VO45DRG/52R-PUC62N00
R910986161 AA10VO45DRG/52R-PUC64N00
R902400096 AA10VO45DRG/52R-PUC64N00-SO97
R902411836 AA10VO45DRG/52R-VUC11N00-S1171
R902418091 AA10VO45DRG/52R-VUC11N00-S1380
R902402408 AA10VO45DRG/52R-VUC12N00-S1127

所以使用比例閥或伺服閥的目的就是:以電控方式實(shí)現(xiàn)對(duì)流量的節(jié)流控制(當(dāng)然經(jīng)過(guò)結(jié)構(gòu)上的改動(dòng)也可實(shí)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?yàn)樗枰欢ǖ牧髁縼?lái)維持前置級(jí)控制油路的工作。

基本信息
中文名稱(chēng)
比例閥

外文名稱(chēng)
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(lái)說(shuō)和換向閥一樣是滑閥結(jié)構(gòu)，只不過(guò)閥芯的換向不是靠電磁鐵來(lái)推動(dòng)，而是靠前置級(jí)閥輸出的液壓力來(lái)推動(dòng)，這一點(diǎn)和電液換向閥比較相似，只不過(guò)電液換向閥的前置級(jí)閥是電磁換向閥，而伺服閥的前置級(jí)閥是動(dòng)態(tài)特性比較好的噴嘴擋板閥或射流管閥。

也就是說(shuō)，伺服閥的主閥是靠前置級(jí)閥的輸出壓力來(lái)控制的，而前置級(jí)閥的壓力則來(lái)自于伺服閥的入口p，假如p口的壓力不足，前置級(jí)閥就不能輸出足夠的壓力來(lái)推動(dòng)主閥芯動(dòng)作。

而我們知道，當(dāng)負(fù)載為零的時(shí)候，如果四通滑閥完全打開(kāi)，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(jí)閥來(lái)推動(dòng)主閥芯，整個(gè)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(kāi)的情況下，也要有一定的壓力損失，來(lái)維持前置級(jí)閥的正常工作。

伺服閥其實(shí)缺點(diǎn)極多:能耗浪費(fèi)大、容易出故障、抗污染能力差、價(jià)格昂貴等等等等，好處只有一個(gè):動(dòng)態(tài)性能是所有液壓閥中最高的。就憑著這一個(gè)優(yōu)點(diǎn)，在很多對(duì)動(dòng)態(tài)特性要求高的場(chǎng)合不得不使用伺服閥，如飛機(jī)火箭的舵機(jī)控制、汽輪機(jī)調(diào)速等等。動(dòng)態(tài)要求低一點(diǎn)的，基本上都是比例閥的天下了。

一般說(shuō)來(lái)，好像伺服系統(tǒng)都是閉環(huán)控制，比例閥多用于開(kāi)環(huán)控制;其次比例閥類(lèi)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(yīng)要慢。但從發(fā)展趨勢(shì)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(qiáng)!

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(méi)有嚴(yán)格的規(guī)定，因?yàn)楸壤y的性能越來(lái)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(diǎn):

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

2.性能參數(shù)不同。滯環(huán)、中位死區(qū)、頻寬、過(guò)濾精度等特性不同，因此應(yīng)用場(chǎng)合不同，伺服閥和伺服比例閥主要應(yīng)用在閉環(huán)控制系統(tǒng)，其它結(jié)構(gòu)的比例閥主要應(yīng)用在開(kāi)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(méi)有死區(qū)，比例閥有中位死區(qū);

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

2.3 伺服閥對(duì)液壓油液的要求更高，需要經(jīng)過(guò)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(jī)能種類(lèi)不同。比例換向閥具有與普通換向閥相似的中位機(jī)能，而伺服閥中位機(jī)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(lái)控制流量和流向。

延伸資料
---電氣比例閥

自動(dòng)控制可分成斷續(xù)控制和連續(xù)控制。斷續(xù)控制即開(kāi)關(guān)控制。氣動(dòng)控制系統(tǒng)中使用動(dòng)作頻率較低的開(kāi)關(guān)式(ON-OFF)的換向閥來(lái)控制氣路的通斷。靠減壓閥來(lái)調(diào)節(jié)所需要的壓力，靠節(jié)流閥來(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)先進(jìn)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(kāi)環(huán)控制和閉環(huán)控制之分。

結(jié)構(gòu)原理

輸入信號(hào)增大，供氣用電磁閥先導(dǎo)閥1換向，而排氣用電磁先導(dǎo)閥7處于復(fù)位狀態(tài)，則供氣壓力從SUP口通過(guò)閥1進(jìn)入先導(dǎo)室5，先導(dǎo)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(kāi)啟，排氣閥芯3關(guān)閉，產(chǎn)生輸出壓力。此輸出壓力通過(guò)壓力傳感器6反饋至控制回路8。在這里，與目標(biāo)值進(jìn)行快速比較修正，知道輸出壓力與輸入信號(hào)成一定比例為止，從而得到輸出壓力與輸入信號(hào)的變化成比例的變化。由于沒(méi)有噴嘴擋板機(jī)構(gòu)，故閥對(duì)雜質(zhì)不敏感，可靠性高。

特點(diǎn)

1)可實(shí)現(xiàn)壓力、速度的無(wú)極調(diào)節(jié)，避免了常通的開(kāi)關(guān)式氣閥換向時(shí)的沖擊現(xiàn)象。

2)能實(shí)現(xiàn)遠(yuǎn)程控制和程序控制。

3)與斷續(xù)控制相比，系統(tǒng)簡(jiǎn)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(jiǎn)單、成本較低，但響應(yīng)速度比液壓系統(tǒng)慢得多，對(duì)負(fù)載變化也比較敏感。

5)使用功率小、發(fā)熱少、噪聲低。

6)不會(huì)發(fā)生火災(zāi)，不污染環(huán)境。受溫度變化的影響小。

公司簡(jiǎn)介：

武漢百士自動(dòng)化設(shè)備有限公司位于武漢洪山區(qū)，是一家從事經(jīng)營(yíng)自動(dòng)化儀表備件、液壓泵閥的貿(mào)易型公司；專(zhuān)注于中國(guó)工業(yè)傳動(dòng)自動(dòng)化流體領(lǐng)域。主營(yíng)產(chǎn)品數(shù)控模塊、伺服電機(jī)、可編程控制器、傳感器、氣動(dòng)元件、工業(yè)儀器儀表、電磁閥、柱塞泵、液壓元件等。經(jīng)營(yíng)品牌有：貝加萊B&R、西門(mén)子Siemens、本特利bently、愛(ài)爾泰克Airtec氣動(dòng)、安沃馳Aventics、博世力士樂(lè)rexroth、阿托斯ATOS、迪普馬DUPLOMATIC、Parker派克、伊頓EATON VICKERS等品牌。 
    
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