伺服控制閥
伺服控制閥輸入信號(電量、機(jī)械量)多為偏差信號(輸入信號與反饋信號的差值),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)。
大型鋼廠現(xiàn)場采用的主要伺服閥如:伺服閥，
1、基本結(jié)構(gòu)：
主閥體（閥芯/閥套）、先導(dǎo)閥（伺服射流管）、電氣控制盒（放大版）
2、工作原理
伺服射流管先導(dǎo)級
射流管先導(dǎo)級主要由力矩馬達(dá)、射流管和接收器組成。
當(dāng)線圈中有電流通過時(shí),產(chǎn)生的電磁力使射流管噴嘴偏離零位,管內(nèi)的大部分液流集中射向一側(cè)的接收器,而另一側(cè)接收 器所得到的流量減少,由此造成兩接收器的壓力變化。主閥閥芯因此壓差而產(chǎn)生位移。
先導(dǎo)級的泄漏油通過噴嘴環(huán)形區(qū)域處的排出通道直接回油箱。
液壓伺服控制系統(tǒng)
以伺服控制元件完成動(dòng)力與運(yùn)動(dòng)方向控制，綜合壓力、流量、方向控制為一體，利用偏差控制進(jìn)行糾偏，以滿足精度控制需要，必須為閉環(huán)控制，可實(shí)現(xiàn)較高頻率( 100HZ以上) ,有滑閥式、噴嘴擋板式、射流管式等，常采用機(jī)械伺服、電液伺服、氣液伺服。
液壓伺服系統(tǒng)的特點(diǎn)如下:
(1)反饋。把輸出量的一部分或全部按一定方式回送到輸入端，并和輸入信號進(jìn)行比較，這就是反饋。在上例中，反饋(檢測時(shí)速裝置輸出)電壓和給定(輸入信號)電壓是異號的，即反饋信號不斷地抵消輸入信號，這是負(fù)反饋。自動(dòng)控制系統(tǒng)大多數(shù)是負(fù)反饋。
(2)偏差。要使液壓缸輸出一定的力和速度，伺服閥必須有一定的開口量，因此輸入和輸出之間必須有偏差信號。液壓缸運(yùn)動(dòng)的結(jié)果又力圖消除這個(gè)誤差。但在伺服系統(tǒng)工作的任何時(shí)刻都不能完全消除這一-偏差，伺服系統(tǒng)正是依靠這一-偏差信號進(jìn)行工作的。
(3)放大。執(zhí)行元件(液壓缸)輸出的力和功率遠(yuǎn)遠(yuǎn)大于輸入信號的力和功率，其輸出的能量是液壓能源供給的。
(4)跟進(jìn)。液壓缸的輸出量完全跟進(jìn)輸入信號的變化。
電液比例閥是比例控制系統(tǒng)中的主要功率放大元件,按輸入電信號指令連續(xù)地成比例地控制液壓系統(tǒng)的壓辦流量等參數(shù)。與伺 服控制系統(tǒng)中的伺服閥相比,在某些方面還有一-定的性能差距(主要性能比較如表1所示),但它顯著的優(yōu)點(diǎn)是抗污染能力強(qiáng),大大地減少了由污染而造成的工作故障,提高了液壓系統(tǒng)的工作穩(wěn)定性和可靠性。另一方面比例閥的成本比伺服閥低，結(jié)構(gòu)也簡單,已在許多場合獲得廣泛應(yīng)用。
型號 2WRCE…/P and 3WRCE…/P
高頻響方向閥（塊狀安裝），先導(dǎo)式，帶集成電控器（OBE）和電位反饋
規(guī)格32至50
元件系列2X
安裝尺寸按照DIN ISO 7368 (2WRCE型)
適合位置、速度和壓力的閉環(huán)控制
通過比例閥控制
結(jié)構(gòu)緊固
通過感應(yīng)位置監(jiān)測器對控制閥芯進(jìn)行位置感應(yīng)
規(guī)格63和80，請?jiān)儐柋竟?
力士樂REXROTH三位三通方向高響應(yīng)閥，先導(dǎo)操作，電感位置傳感器3WRCBH
0811402509 3WRCBH25V190M-1X/M-127NG25Q190L&
0811402511 3WRCBH25V190M-1X/M
0811402512 3WRCBH25V65M-1X/M
0811402519 3WRCBH25V65M-1X/M-127
0811402522 3WRCBH25VF190M-1X/M
0811402514 3WRCBH25VF190M-1X/ZM
0811402510 3WRCBH25VF190M-1X/ZM-127
0811402513 3WRCBH25VF65M-1X/ZM
0811402611 3WRCBH32V380M-1X/M
0811402608 3WRCBH32V380M-1X/M-127
0811402702 3WRCBH32V380M-1X/M-128
R901403244 3WRCBH32V380M-1X/M-128=KM
R901403242 3WRCBH32V380M-1X/M=KM
0811402610 3WRCBH32VF380M-1X/M
0811402609 3WRCBH32VF380M-1X/M-127
0811402644 3WRCBH50V750M-1X/M
0811402643 3WRCBH50V750M-1X/M-127
0811402640 3WRCBH50VF300M-1X/ZM
0811402638 3WRCBH50VF300M-1X/ZM-127
0811402646 3WRCBH50VF750M-1X/M
0811402639 3WRCBH50VF750M-1X/ZM
0811402637 3WRCBH50VF750M-1X/ZM-127
0811402680 3WRCBH80VF1800M-1X/ZM-127
力士樂REXROTH三位三通高響應(yīng)方向閥（插裝閥）與集成控制電子3WRCBEE
R901174489 3WRCBEE25VF190M-1X/G24K31/A1M
R901286710 3WRCBEE25VF190M-1X/G24K31/A1M-142
R901174491 3WRCBEE25VF190M-1X/G24K31/F1M
R901286705 3WRCBEE25VF190M-1X/G24K31/F1M-142
R901174492 3WRCBEE32VF380M-1X/G24K31/A1M
R901P74492 3WRCBEE32VF380M-1X/G24K31/A1M_PT
R901208054 3WRCBEE32VF380M-1X/G24K31/A1V
R901174494 3WRCBEE32VF380M-1X/G24K31/F1M
R901174495 3WRCBEE50V750M-1X/G24K31/A1M
R901174497 3WRCBEE50V750M-1X/G24K31/F1M
力士樂REXROTH二通高響應(yīng)插裝閥2WRCE...-2X/P
R901042924 2WRCE32S185R-2X/PG24K31/A1M
R901231773 2WRCE32S185R-2X/PG24K31/A1M-129
R901251113 2WRCE32S185R-2X/PG24K31/A1WK15M
R901040987 2WRCE32S480R-2X/PG24K31/A1M
R901069194 2WRCE32S480R-2X/PG24K31/A1M-108
R901115518 2WRCE32S480R-2X/PG24K31/A1M-121
R901159525 2WRCE32S480R-2X/PG24K31/A1M-129
R901163523 2WRCE32S480R-2X/PG24K31/A1M-130
R901048952 2WRCE32S480R-2X/PG24K31/A1M-95
R901198942 2WRCE32S480R-2X/PG24K31/A1WK15M
R901068836 2WRCE32S480R-2X/PG24K31/C1M
R901314011 2WRCE32S480R-2X/PG24K31/C1V
R901196542 2WRCE32S480R-2X/PG24K31/C1WL15M
R901377142 2WRCE32S600P-2X/PG24K31/A1M-124
R901027188 2WRCE32S650L-2X/PG24K31/A1M-88
R901036037 2WRCE32S650L-2X/PG24K31/A1M-91
R901059018 2WRCE32S650L-2X/PG24K31/A1M-94
R901048950 2WRCE32S650L-2X/PG24K31/A1M-95
R901401801 2WRCE32S650L-2X/PG24K31/A1WK15M
R900743275 2WRCE32S650L-2X/PG24K31/A1WK15M-64
R901169814 2WRCE32S650L-2X/PG24K31/A1WL15M
R901174378 2WRCE32S650L-2X/PG24K31/C1M-74
R901402694 2WRCE32S650L-2X/PG24K31/C1WK15V
R901347152 2WRCE32S650L-2X/PG24K31/C1WL15M
R901044003 2WRCE40S1000L-2X/PG24K31/A1M-94
R901048948 2WRCE40S1000L-2X/PG24K31/A1M-95
R900729097 2WRCE40S1000L-2X/PG24K31/A1V-64
R901045227 2WRCE40S1000L-2X/PG24K31/A1WK15M
R901316592 2WRCE40S1000L-2X/PG24K31/C1M
R901402677 2WRCE40S1000L-2X/PG24K31/C1WK15V
R901347155 2WRCE40S1000L-2X/PG24K31/C1WL15M
R901115520 2WRCE40S700R-2X/PG24K31/A1M-121
R901206725 2WRCE40S700R-2X/PG24K31/A1M-124
R901154917 2WRCE40S700R-2X/PG24K31/A1M-129
R901033120 2WRCE40S700R-2X/PG24K31/A1M-64
R901048944 2WRCE40S700R-2X/PG24K31/A1M-95
R901231424 2WRCE40S700R-2X/PG24K31/A1WK15M
R901199043 2WRCE40S700R-2X/PG24K31/A1WK15M-107
R901096639 2WRCE40S700R-2X/PG24K31/A1WL15M
R901417204 2WRCE40S700R-2X/PG24K31/C1M
R901377143 2WRCE40S900P-2X/PG24K31/A1M-124
R900740694 2WRCE40S900P-2X/PG24K31/A1V
R901064878 2WRCE50S1100R-2X/PG24K31/A1M
R901383637 2WRCE50S1100R-2X/PG24K31/A1M-124
R901106766 2WRCE50S1100R-2X/PG24K31/A1M-94
R901065658 2WRCE50S1100R-2X/PG24K31/A1M-95
R900740695 2WRCE50S1100R-2X/PG24K31/A1V
R901190784 2WRCE50S1100R-2X/PG24K31/A1WK15M
R901230256 2WRCE50S1100R-2X/PG24K31/A1WK15M-107
R901320787 2WRCE50S1100R-2X/PG24K31/A1WL15M
R901090031 2WRCE50S1100R-2X/PG24K31/C1M
R901308536 2WRCE50S1100R-2X/PG24K31/C1M-124
R901108053 2WRCE50S1100R-2X/PG24K31/C1M-94
R901196540 2WRCE50S1100R-2X/PG24K31/C1WL15M
R901351913 2WRCE50S1450P-2X/PG24K31/A1M-124
R901192854 2WRCE50S1600L-2X/PG24K31/A1M-124
R901116643 2WRCE50S1600L-2X/PG24K31/A1M-94
R901262116 2WRCE50S1600L-2X/PG24K31/A1WK15M
R901406242 2WRCE50S1600L-2X/PG24K31/A1WK15M-107
R901419913 2WRCE50S1600L-2X/PG24K31/A1WK15M-124
R901230127 2WRCE50S1600L-2X/PG24K31/A1WL15M
R901086082 2WRCE50S1600L-2X/PG24K31/C1M
R901347156 2WRCE50S1600L-2X/PG24K31/C1WL15M
R901015735 2WRCE50S1960L-2X/PG24K31/C1M-71
力士樂REXROTH三通高速響應(yīng)插裝閥3WRCE...-2X/P
R901061386 3WRCE40V000P-2X/PG24K31/A1M-110
R900740693 3WRCE40V460L-2X/PG24K31/A1V
R901046778 3WRCE50E620P-2X/PG24K31/A1M-77
R901390429 3WRCE50E620P-2X/PG24K31/A1WL15V
R901169342 3WRCE50V000P-2X/PG24K31/A1M-135
R901176088 3WRCE50V000X-2X/PG24K31/A1M-136
R901186238 3WRCE50V000X-2X/PG24K31/A1M-137
R901044002 3WRCE50V720L-2X/PG24K31/A1M-94
R901190789 3WRCE50V720L-2X/PG24K31/A1WK15M
R901025109 3WRCE50V720L-2X/PG24K31/A1WK15V
R901061996 3WRCE50V720L-2X/PG24K31/C1M
力士樂REXROTH二通高響應(yīng)插裝閥2WRC(E)...-1X/S
R900563219 2WRC100D001-1X/E/M-8
R900529821 2WRC100K001-1X/E/M-2
R900559435 2WRC100K001-1X/P/M
R900901244 2WRC100K001-1X/P/M-25
R900956670 2WRC100K001-1X/S/M-12
R900571446 2WRC125D001-1X/P/M-3
R900927785 2WRC125K001-1X/E/M-2
R901420262 2WRC125K001-1X/E/V
R900553382 2WRC125K001-1X/P/M-3
R901214423 2WRC125K001-1X/S/M-54
R901214425 2WRC160K001-1X/S/M-54
R900935586 2WRC32D001-1X/S/M
R900578754 2WRC32K001-1X/E/M
R900944289 2WRC32K001-1X/E/M-2
R900537641 2WRC32K001-1X/P/M-5
R900519861 2WRC32K001-1X/S/M
R900928730 2WRC32S001-1X/S/M
R900529857 2WRC40D001-1X/S/M
R900578753 2WRC40K001-1X/E/M
R900941858 2WRC40K001-1X/E/M-2
R900577454 2WRC40K001-1X/S/M
R900554860 2WRC40K001-1X/S/M-7
R900546948 2WRC40K002-1X/S/M-7
R900905032 2WRC40S001-1X/S/M
R900929767 2WRC50D001-1X/S/M
R900957434 2WRC50K001-1X/E/M
R900918126 2WRC50K001-1X/E/M-2
R900529238 2WRC50K001-1X/S/M
R900728014 2WRC50K001-1X/S/M-65
R900560651 2WRC50K002-1X/S/M-7
R900249343 2WRC50S001-1X/S/M
R900935587 2WRC63D001-1X/S/M-38
R901043901 2WRC63D001-1X/S/M-92
R900552261 2WRC63K001-1X/E/M-2
R900552505 2WRC63K001-1X/S/M-16
R900563220 2WRC80D001-1X/E/M-8
R901043903 2WRC80D001-1X/S/M-93
R900547090 2WRC80K001-1X/E/M-2
R901232770 2WRC80S001-1X/S/M
R901100800 2WRCE100D001-1X/SG24/LM-116
R900962180 2WRCE100D001-1X/SG24/LM-37
R901182306 2WRCE100D001-1X/SG24/LM-53
R900786565 2WRCE100D001-1X/SG24/LM-59
R901083245 2WRCE100D001-1X/SG24/LM-83
R900965652 2WRCE100D001-1X/SG24/M-53
R900708807 2WRCE100D001-1X/SG24/M-56
R901037795 2WRCE100D001-1X/SG24/M-59
