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电液比例多路阀负载传感与压力补偿技术
节约能量、降低油温和提高控制精度，同时也使同步动作几个执行元件运动时互不干扰，现较先进工程机械都采用了负载传感与压力补偿技术。负载传感与压力补偿是一一个很相似概念,都是利用负载变化引起压力变化去调节泵或阀压力与流量以适应系统工作需求。负载传感对定量泵系统来讲是将负载压力负载感应油路引至远程调压溢流阀上，当负载较小时，溢流阀调定压力也较小;负载较大，调定压力也较大，但也始终存一定溢流损失。变量泵系统是将负载传感油路引入到泵变量机构，使泵输出压力随负载压力升高而升高(始终为较小固定压差)，使泵输出流量与系统实际需要流量相等，无溢流损失，实现了节能。压力补偿是提高阀控制性能而采取一种保证措施。将阀口后负载压力引入压力补偿阀，压力补偿阀对阀口前压力进行调整使阀口前后压差为常值，这样节流口流量调节特性流经阀口流量大小就只与该阀口开度有关，而不受负载压力影响。

工程机械电液比例阀先导控制与遥控
电液比例阀和其它专用器件技术进步使工程车辆挡位、转向、制动和工作装置等各种系统电气控制成为现实。一般需要位移输出机构可采用比例伺服控制手动多路阀驱动器完成。电气操作具有响应快、布线灵活、可实现集成控制和与计算机接口容易等优点,现代工程机械液压阀已越来越多采用电控先导控制电液比例阀(或电液开关阀)代替手动直接操作或液压先导控制多路阀。采用电液比例阀(或电液开关阀)另一个显著优点是工程车辆上可以大大减少操作手柄个数，这使驾驶室布置简洁，能够有效降低操作复杂性，对提高作业质量和效率都具有重要实际意义。

电液比例阀工程机械上应用实例
汽车起重机液压系统。该机采用了3片型比例多路阀，负载传感油路中3个梭阀将3个工作负载中大压力选出来送至远程调压溢流阀远控口，调整溢流阀溢流压力，使液压泵输出压力恰好符合系统负载需要即可，达到一定节能目。压力补偿油路使每一片阀流量仅与该阀开度有关，而所承受负载无关，它阀片所承受负载也没有关系，达到任一负载下均可随意控制负载速度目。
推土机推土铲手动与电液比例先导控制实例。当二位三通电磁阀不通电时，先导压力与手动减压式先导阀相通，梭阀选择来自手动先导阀压力对液动换向阀进行控制;当二位三通电磁阀通电时，先导控制压力油通向三通比例减压式先导阀，梭阀对液动换向阀进行控制。

比例控制技术是在开关控制技术和伺服控制技术之间的过渡技术，采用比例放大器控制比例电磁铁，实现对比例阀的连续控制，从而实现对液压系统压力、流量、方向的无级调节；但是用比例方向阀进行速度控制时，如果负载是变化的，那么执行元件的速度就会受负载变化的影响（负载小时速度快，负载大时速度慢）；于是在系统设计时，人们引入了压力补偿器，它可以使比例阀阀口的压差保持恒定，使执行元件的速度不受负载变化的影响。

某钢厂步进梁式加热炉中步进梁升降液压回路。 此回路使用了比例方向阀与进口压力补偿。 由于步进梁下降时，存在超越负载，所以在油缸无杆腔设置了平衡阀。 压力补偿器的弹簧调定后（这里为定值）,比例阀节流口的压差 Δp 就近似为恒定值,即比例方向阀进油口前后压差 Δp 保持恒定值。 当节流口前后压差保持不变时,通过节流口的流量只与节流口的开口面积成正比。 对比例方向阀而言, 进油节流口的开口面积与比例方向阀的输入电流信号有关,而与负载的变化无关。 亦即升降油缸的供油流量 Q 只与比例方向阀的输入电流信号有关,与负载的变化无关。

补偿器主要用于节流调速系统 ，即补偿比例阀口的压差，在定量泵系统中得到了广泛的应用；但这种应用不可避免地会产生一定的溢流损失；如果二通压力补偿器与泵控压力补偿器配合使用，则可以实现容积节流调速。 

变量泵+比例多路阀的形式， 组成了负载敏感回路；除每一联多路阀都设有进口压力补偿器外；变量泵还配有泵控压力补偿器；此补偿器与反馈油路配合可实现负载敏感控制， 使此回路不仅降低了比例阀阀口的节流损失，也将液压系统的溢流损失降到低。
REXROTH高响应伺服阀4WRDE27W500L-53/6L24K9/MR
力士乐REXROTH高响应方向阀，先导，带集成电控装置（OBE）和电气位置反馈4WRDE -5X
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R900532406 4WRDE25V1-350L-5X/6L24TZ9/WG021MR
R900939571 4WRDE25V1-350P-5X/6L24ETK9/WG021MR
R900553563 4WRDE25V220S-5X/6L24EZ9/WG043M
R900510539 4WRDE25V350L-5X/6L24ETZ9/MR
R900557302 4WRDE25V350L-5X/6L24ETZ9/WG021M
R900551315 4WRDE25V350L-5X/6L24EZ9/M
R900534396 4WRDE25V350L-5X/6L24EZ9/MR
R900522616 4WRDE25V350L-5X/6L24Z9/VR
R900507569 4WRDE25V350P-5X/6L24Z9/M
R900904214 4WRDE25V350P-5X/6L24Z9/V
R900907090 4WRDE25V350P-5X/6L24Z9/WG021MR
R900546206 4WRDE25V500P-5XH/6L24Z9/M
R900940887 4WRDE25W500P-5XH/6L24K9/WG152M
R901176735 4WRDE32E1-600P-5X/6L24K9/M
R900573826 4WRDE32E1-600P-5X/6L24Z9/M
R900538271 4WRDE32E3-400L-5X/6L24EZ9/WG021MR
R900538141 4WRDE32E3-600L-5X/6L24EZ9/WG021MR
R901117068 4WRDE32E400L-5X/6L24EK9/M
R901154999 4WRDE32E400L-5X/6L24K9/M-280
R901067986 4WRDE32E600L-5X/6L24K9/M
R901154343 4WRDE32E600L-5X/6L24K9/M-280
R901163606 4WRDE32E600L-5X/6L24K9/V
R900550616 4WRDE32E600P-5X/6L24Z9/V
R900562997 4WRDE32Q2-600P-5X/6L24Z9/M
R900578209 4WRDE32V1-600L-5X/6L24Z9/WG021M
R900551673 4WRDE32V1-600P-5X/6L24Z9/WG021M
R900553131 4WRDE32V600P-5X/6L24ETZ9/M
R900566416 4WRDE32V600P-5X/6L24ETZ9/MR-280
R900558160 4WRDE32V600P-5X/6L24Z9/MR
R900906048 4WRDE32V600P-5X/6L24Z9/WG021MR
R900552866 4WRDE32W1-600L-5X/6L24EZ9/M
R900904803 4WRDE32W1-600L-5X/6L24EZ9/MR-280
R900571274 4WRDE32W3-600L-5X/6L24EZ9/M
R901104990 4WRDE32W600L-5X/6L24K9/M
R900546213 4WRDE35E1-1000L-5X/6L24Z9/WG021MR
R900516766 4WRDE35E1000L-5X/6L24Z9/M-297
R900552194 4WRDE35E1000L-5X/6L24Z9/V
R900922325 4WRDE35E3-1000L-5X/6L24ETZ9/WG021M
R900537895 4WRDE35E3-1000L-5X/6L24Z9/WG021M
R900538980 4WRDE35E3-1000L-5X/6L24Z9/WG021MR
R900917771 4WRDE35R5-1000R-5X/6L24Z9/WG161MR-565
R900900508 4WRDE35V1000L-5X/6L24Z9/M-590
R900911477 4WRDE35V1000L-5X/6L24Z9/M-610
力士乐REXROTH三位四通高响应换向阀，先导操作，具有电气位置反馈4WRD...XN
R901380290 4WRD10V1-100L-5X/6L24XNEK31/VR    
R901279032 4WRD25V1-350L-5X/6L24XNEK31/VR
力士乐REXROTH三位三通方向高响应阀，先导操作，电感位置传感器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
力士乐REXROTH三位三通高响应方向阀（插装阀）与集成控制电子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
力士乐REXROTH二通高响应插装阀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
力士乐REXROTH三通高速响应插装阀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
力士乐REXROTH二通高响应插装阀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
R900905771 2WRCE100K001-1X/EG15/M-30
R901189419 2WRCE100K001-1X/PG24/M-120
R900575791 2WRCE100K001-1X/SG15/LM-21
R900924584 2WRCE100K001-1X/SG15/M-34
R900571444 2WRCE100K001-1X/SG24/LM-12
R900926471 2WRCE100K001-1X/SG24/LM-36
R901083107 2WRCE100K001-1X/SG24/LM-53
R901264283 2WRCE100K001-1X/SG24/M
R900571445 2WRCE100K001-1X/SG24/M-12
R901242265 2WRCE100K001-1X/SG24/M-143
R901183371 2WRCE100K001-1X/SG24/M-53
R901161311 2WRCE100K001-1X/SG24/M-54
R901022804 2WRCE100K001-1X/SG24/M-86
R901325646 2WRCE100K001-1X=SG24/M
R900911150 2WRCE100K003-1X/SG24/M-12
R900936791 2WRCE100K003-1X/SG24/M-36
R900247001 2WRCE100K003-1X/SG24/M-58
R901083585 2WRCE100S002-1X/PG24/M-66
R901324978 2WRCE100S002-1X/PG24/V-124
R900917361 2WRCE100S002-1X/SG15/M-21
R900951373 2WRCE100S002-1X/SG15/M-46
R900768561 2WRCE100S002-1X/SG15/M-73
R901041740 2WRCE100S002-1X/SG24/M-37
R901312446 2WRCE100S002-1X/SG24/M-54
R900941140 2WRCE125D001-1X/EG15/M-30
R901161471 2WRCE125D001-1X/SG24/LM-53
R900940860 2WRCE125D001-1X/SG24/M-37
R900965653 2WRCE125D001-1X/SG24/M-53
R900556309 2WRCE125K001-1X/PG15/M-3
R900571442 2WRCE125K001-1X/SG15/LM-13
R901208203 2WRCE125K001-1X/SG24/LM-138
R900926472 2WRCE125K001-1X/SG24/LM-36
R901164032 2WRCE125K001-1X/SG24/LM-53
R901216117 2WRCE125K001-1X/SG24/LM-54
R901264336 2WRCE125K001-1X/SG24/M
R901242864 2WRCE125K001-1X/SG24/M-143
R901311774 2WRCE125K001-1X/SG24/M-144
R901017900 2WRCE125K001-1X/SG24/M-53
R901267684 2WRCE125K001-1X/SG24/M-54
R901051259 2WRCE125S001-1X/SG15/M-80
R900950688 2WRCE160D001-1X/SG24/M-37
R900918952 2WRCE32D001-1X/SG24/M
R900951199 2WRCE32D001-1X/SG24/M-35
R900940862 2WRCE32D001-1X/SG24/M-37
R900550191 2WRCE32K001-1X/PG24/M-5
R900547613 2WRCE32K001-1X/SG24/M-12
R900964805 2WRCE32K001-1X/SG24/M-36
R900940861 2WRCE32K001-1X/SG24/M-37
R900717938 2WRCE32K001-1X/SG24/M-39
R900537640 2WRCE32K001-1X/SG24/M-4
R900965087 2WRCE32K001-1X/SG24/M-53
R900706316 2WRCE32K001-1X/SG24/V-61
R900919778 2WRCE32S001-1X/SG24/M
R900929655 2WRCE32S001-1X/SG24/M-37
R900547801 2WRCE40D001-1X/SG24/M
R900708804 2WRCE40D001-1X/SG24/M-56
R900969010 2WRCE40D001-1X/SG24/V-37
R900976004 2WRCE40D001-1X/SG24/V-56
R900548491 2WRCE40K001-1X/SG15/M-15
R900557116 2WRCE40K001-1X/SG15/M-19
R900547614 2WRCE40K001-1X/SG24/M-12
R900962738 2WRCE40K001-1X/SG24/M-36
R900724037 2WRCE40K001-1X/SG24/M-37
R900965650 2WRCE40K001-1X/SG24/M-54
R900909345 2WRCE40K002-1X/SG15/M-19
R900979469 2WRCE40S001-1X/SG24/M
R900955087 2WRCE40S001-1X/SG24/M-12
R900979575 2WRCE40S001-1X/SG24/M-36
R900974337 2WRCE50D001-1X/SG24/LM-36
R900907275 2WRCE50D001-1X/SG24/M
R900928787 2WRCE50D001-1X/SG24/M-2
R900962547 2WRCE50D001-1X/SG24/M-36
R900708805 2WRCE50D001-1X/SG24/M-56
R900969099 2WRCE50D001-1X/SG24/V-53
R900718468 2WRCE50D001-1X/SG24/V-56
R900977697 2WRCE50D001-1X/SG24/V-57
R900917148 2WRCE50K001-1X/SG15/M-20
R900956686 2WRCE50K001-1X/SG15/M-43
R900962253 2WRCE50K001-1X/SG15/M-52
R900547615 2WRCE50K001-1X/SG24/M-12
R900902194 2WRCE50K001-1X/SG24/M-2
R900933405 2WRCE50K001-1X/SG24/M-36
R900579924 2WRCE50K002-1X/SG15/M-20
R900924763 2WRCE50S001-1X/SG24/M
R900724266 2WRCE50S001-1X/SG24/M-2
R900930697 2WRCE50S001-1X/SG24/M-37
R901264958 2WRCE63D001-1X/PG24/M-124
R901094888 2WRCE63D001-1X/PG24/M-66
R901096626 2WRCE63D001-1X/PG24/M-81
R900940863 2WRCE63D001-1X/SG24/M-37
R901337225 2WRCE63D001-1X/SG24/M-53
R901318762 2WRCE63D001-1X/SG24/M-54
R900708806 2WRCE63D001-1X/SG24/M-56
R901037801 2WRCE63D001-1X/SG24/M-59
R900974747 2WRCE63D001-1X/SG24/V-37
R900976006 2WRCE63D001-1X/SG24/V-56
R901325647 2WRCE63D001-1X=SG24/M
R901110657 2WRCE63K001-1X/PG24/M-120
R900733105 2WRCE63K001-1X/PG24/M-66
R901160262 2WRCE63K001-1X/PG24/M-81
R900554948 2WRCE63K001-1X/SG15/M-16
R900902949 2WRCE63K001-1X/SG15/M-27
R900911698 2WRCE63K001-1X/SG15/M-31
R900948285 2WRCE63K001-1X/SG15/M-44
R901035921 2WRCE63K001-1X/SG15/M-89
R901103670 2WRCE63K001-1X/SG24/M
R900933404 2WRCE63K001-1X/SG24/M-36
R900724035 2WRCE63K001-1X/SG24/M-37
R900724198 2WRCE63K001-1X/SG24/M-38
R900937106 2WRCE63K001-1X/SG24/M-39
R901362000 2WRCE63K001-1X/SG24/M-53
R900965651 2WRCE63K001-1X/SG24/M-54
R900968996 2WRCE63K001-1X/SG24/V-37
R900976005 2WRCE63K001-1X/SG24/V-56
R901325648 2WRCE63K001-1X=SG24/M
R901169979 2WRCE63S001-1X/PG24/M-120
R900765386 2WRCE63S001-1X/PG24/M-66
R900956264 2WRCE63S001-1X/SG15/M-48
R901187881 2WRCE63S001-1X/SG24/M
R901196178 2WRCE63S001-1X/SG24/M-124
R900959948 2WRCE63S001-1X/SG24/M-37
R901018185 2WRCE63S001-1X/SG24/M-53
R901161308 2WRCE63S001-1X/SG24/M-54
R900782599 2WRCE63S001-1X/SG24/M-59
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R901264956 2WRCE80D001-1X/PG24/M-124
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R901264284 2WRCE80D001-1X/SG24/M
R900940703 2WRCE80D001-1X/SG24/M-37
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R900616866 2WRCE80D001-1X/SG24/M-59
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R901086135 2WRCE80K001-1X/PG24/M-112
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R901010545 2WRCE80K001-1X/PG24/M-66
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力士乐REXROTH二通高响应插装阀2WRCE...-2X/S
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力士乐REXROTH三通高响应插装阀3WRC(E)...-1X/S
R900927091 3WRCE100L006-1X/SG15/LM-37
R901007469 3WRCE100L006-1X/SG24/M-54
R900561847 3WRCE100V001-1X/SG15/M-6
R900577829 3WRCE32L001-1X/SG24/M-1
R900901789 3WRCE32L001-1X/SG24/M-24
R900972198 3WRCE32L001-1X/SG24/M-9
R900566057 3WRCE32L001-1X=SG24/M-1=FP
R900909344 3WRCE32L002-1X/SG15/M
R900924215 3WRCE32L002-1X/SG15/M-35
R900551244 3WRCE32L002-1X/SG24/M
R900553479 3WRCE32L002-1X/SG24/M-1
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R900924583 3WRCE80L002-1X/SG15/LM-33
R900974972 3WRCE80L002-1X/SG15/LM-55
R901035923 3WRCE80L002-1X/SG15/LM-90
R900927422 3WRCE80L006-1X/SG15/LM-37
R900947517 3WRCE80L006-1X/SG24/M-37
力士乐REXROTH三通高响应插装阀3WRCE...-2X/S
R900974179 3WRCE32V180L-2X/SG24K31/A5M-63=FP
R900742401 3WRCE32V180L-2X/SG24K31/A5M-67
R901015682 3WRCE32V180L-2X/SG24K31/A5M-70
R901015875 3WRCE32V180L-2X/SG24K31/A5M-85
R901062727 3WRCE32V290L-2X/SG24K31/C1M
R901006896 3WRCE32V300L-2X/SG24K31/A1M-71
R901223177 3WRCE40E440L-2X/SG24K31/A1M
R901021128 3WRCE40V000P-2X/SG24K31/C5M-109
R901166969 3WRCE40V000P-2X/SG24K31/C5M-132
R901138400 3WRCE40V000R-2X/SG24K31/A1M-126
R901071903 3WRCE40V000R-2X/SG24K31/A1WK15M-149
R901216798 3WRCE40V000X-2X/SG24K31/C5M-140
R901049500 3WRCE40V460L-2X/SG24K31/A1WK15M
R901340701 3WRCE40V460L-2X/SG24K31/C1M
R900972593 3WRCE40V460L-2X/SG24K31/C5M-78
R901170439 3WRCE50E000P-2X/SG24K31/A1M-71
R901238667 3WRCE50E620P-2X/SG24K31/A1M
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R901212336 3WRCE50V000X-2X/SG24K31/C5M-140
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R901092615 3WRCE50V720L-2X/SG24K31/A1M-114
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R901016681 3WRCE50V720L-2X/SG24K31/A1M-2
R900740697 3WRCE50V720L-2X/SG24K31/A1V
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R901036805 3WRCE50V720L-2X/SG24K31/A1WL15M
R901116591 3WRCE50V720L-2X/SG24K31/A5M
R901127021 3WRCE50V720L-2X/SG24K31/A5M-124
R901441665 3WRCE50V720L-2X/SG24K31/C1/M
R901166968 3WRCE50V720L-2X/SG24K31/C5M-131
R901438334 3WRCE50V730P-2X/SG24K31/C1M-71
力士乐REXROTH定向伺服阀
力士乐REXROTH四通伺服方向阀4WS.2E...
R900243949 4WS2EM6-2X/10B11ET210K17EV
R900732437 4WS2EM6-2X/10B11ET315K17BV
R900971966 4WS2EM6-2X/10B11ET315K17DV
R900951450 4WS2EM6-2X/10B11ET315K17EV
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R900968833 4WS2EM6-2X/10B12ET315K17EV
R901304925 4WS2EM6-2X/15B11ET210K17DV
R901030853 4WS2EM6-2X/15B11ET210K17EV
R900951451 4WS2EM6-2X/15B11ET315K17EV
R900969730 4WS2EM6-2X/15B12ET210K17EV
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R901026397 4WS2EM6-2X/20B11ET315K17CV
R901013793 4WS2EM6-2X/20B11ET315K17DV
R900951452 4WS2EM6-2X/20B11ET315K17EV
R901043233 4WS2EM6-2X/20B12ET210K17DV
R900617993 4WS2EM6-2X/20B12ET210K17EV
R901045632 4WS2EM6-2X/20B12ET315K17DV
R900970190 4WS2EM6-2X/20B12ET315K17EV
R901423633 4WS2EM6-2X/25B11ET210K17EV
R901428731 4WS2EM6-2X/25B11ET315K17CV
R901388023 4WS2EM6-2X/25B11ET315K17DV
R901091476 4WS2EM6-2X/25B11ET315K17EV
R901168900 4WS2EM6-2X/2B11ET210K17DV
R900773305 4WS2EM6-2X/2B11ET210K17EV
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R900736699 4WS2EM6-2X/2B11ET315K17DV
R900950929 4WS2EM6-2X/2B11ET315K17EV
R900248456 4WS2EM6-2X/2B12ET210K17EV
R900971159 4WS2EM6-2X/2B12ET315K17EV
R901119096 4WS2EM6-2X/5B11ET210K17DV
R900974304 4WS2EM6-2X/5B11ET210K17EV
R901276862 4WS2EM6-2X/5B11ET315K17AV
R901249053 4WS2EM6-2X/5B11ET315K17BV
R901205887 4WS2EM6-2X/5B11ET315K17CV
R901000155 4WS2EM6-2X/5B11ET315K17DV
R900951449 4WS2EM6-2X/5B11ET315K17EV
R900617678 4WS2EM6-2X/5B12ET210K17EV
R900970346 4WS2EM6-2X/5B12ET315K17EV
R901350804 4WS2EM6-2X=20B12ET315K17EV
R901283228 4WS2EM6-2X=2B11ET210K17EV
R901023680 4WSE2EM6-2X/10B8ET210K17EV
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R901020344 4WSE2EM6-2X/20B9ET315K17DV
R900952168 4WSE2EM6-2X/20B9ET315K17EV
R901035226 4WSE2EM6-2X/20B9ET315K17EV-121
R901204766 4WSE2EM6-2X/25B9ET210K17DV
R901188952 4WSE2EM6-2X/25B9ET315K17DV
R901176734 4WSE2EM6-2X/25B9ET315K17EV
R900968193 4WSE2EM6-2X/2B8ET210K17EV
R900977929 4WSE2EM6-2X/2B8ET315K17EV
R901201988 4WSE2EM6-2X/2B9ET210K17DV
R900967114 4WSE2EM6-2X/2B9ET210K17EV
R901377881 4WSE2EM6-2X/2B9ET315K17DV
R900952164 4WSE2EM6-2X/2B9ET315K17EV
R901103115 4WSE2EM6-2X/5B8ET210K17EV
R900972861 4WSE2EM6-2X/5B8ET315K17EV
R900970565 4WSE2EM6-2X/5B9ET210K17EV
R900969823 4WSE2EM6-2X/5B9ET315K17DV
R900952165 4WSE2EM6-2X/5B9ET315K17EV
力士乐REXROTH具有机械位置反馈的定向伺服阀4WS2EM 6…XN
R901072928 4WS2EM6-2X/10B11XNET315K17EV
R901259413 4WS2EM6-2X/20B11XNET315K17EV
R901259418 4WS2EM6-2X/2B11XNET315K17EV
力士乐REXROTH三位四通方向伺服阀，机械位置反馈4WS2EM 6…XN-100
R901038987 4WS2EM6-2X/10B11XNET315K17EV-100
R901007772 4WS2EM6-2X/20B11XNET315K17EV-100
R901079959 4WS2EM6-2X/2B11XNET315K17EV-100
R901057853 4WS2EM6-2X/5B11XNET315K17EV-100
R901444388 4WS2EM6-2X=20B11XNET315K17EV-100
力士乐REXROTH三位四通方向伺服阀，机械位置反馈4WS2EM 6…XN-102
R901068705 4WS2EM6-2X/10B11XNET315K17EV-102
R901185876 4WS2EM6-2X/15B11XNET315K17EV-102
R901007768 4WS2EM6-2X/20B11XNET315K17EV-102
R901009654 4WS2EM6-2X/5B11XNET315K17EV-102
R901410942 4WS2EM6-2X=20B11XNET315K17EV-102
R901402478 4WS2EM6-2X=5B11XNET315K17EV-102
力士乐REXROTH四通伺服方向阀4WS.2E...
R901440954 4WS2ED10-5X/20B11T210K31EV-117
R900935430 4WS2ED10-5X/30B11-315K31EV-3
R901062614 4WS2EM10-5X/10B0ET210K31CV-112
R901163649 4WS2EM10-5X/10B11-210K31AV
R901226177 4WS2EM10-5X/10B11-315K31DV
R901007871 4WS2EM10-5X/10B11ET210K31AV
R901316230 4WS2EM10-5X/10B11ET210K31EV
R901440356 4WS2EM10-5X/10B11ET210K8AV
R901324620 4WS2EM10-5X/10B11ET315K31AV
R900731500 4WS2EM10-5X/10B11ET315K31BV
R900731499 4WS2EM10-5X/10B11ET315K31DV
R900956128 4WS2EM10-5X/10B11ET315K31EV
R901146496 4WS2EM10-5X/10B11ET315K8AV
液压系统结构
液压系统由信号控制和液压动力两部分组成，信号控制部分用于驱动液压动力部分中的控制阀动作。
液压动力部分采用回路图方式表示，以表明不同功能元件之间的相互关系。液压源含有液压泵、电动机和液压辅助元件；液压控制部分含有各种控制阀，其用于控制工作油液的流量、压力和方向；执行部分含有液压缸或液压马达，其可按实际要求来选择。

组合机床动力滑台液压系统
动力滑台是组合机床的一种通用部件，在滑台上可以配置各种工艺用途的切削头。机床液压动力滑台可以实现多种不同的工作循环，其中一种比较典型的工作循环是：快进→ 一工进→二工进→死挡铁停留→快退→停止。 使液压缸差动联接以实现快速运动； 系统中采用限压式变量叶片泵供油； 用行程阀、液控顺序阀实现快进与工进的转换； 电液换向阀 使液压缸差动联接和变量泵以实现快速运动；
（1）快进 按下启动按钮，三位五通电液动换向阀5的先导电磁换向阀1YA得电，使之阀芯右移，左位进入工作状态。 用二位二通电磁换向阀实现一工进和二工进之间的速度换接。
（2）一次工作在快进行程结束，滑台上的挡铁压下行程阀。 用行程阀、液控顺序阀实现快进与工进的转换； 用二位二通电磁换向阀实现一工进和二工进之间的速度换接。
（3）第二次工作进给 为保证进给的尺寸精度，采用了死挡铁停留来限位。
（4）死挡铁停留 当动力滑台第二次工作进给终了碰上死挡铁后，液压缸停止不动，系统的压力进一步升高，达到压力继电器15的调定值时，经过时间继电器的延时，再发出电信号，使滑台退回。在时间继电器延时动作前，滑台停留在死挡块限定的位置上。
（5）快退 时间继电器发出电信号后，电液换向阀右位工作。 这时系统的压力较低，变量泵2输出流量大，动力滑台快速退回。由于活塞杆的面积大约为活塞的一半，所以动力滑台快进、快退的速度大致相等。
（6）原位停止 当动力滑台退回到原始位置时，挡块压下行程开关，电液换向阀处于中位，动力滑台停止运动，变量泵卸荷。

液压系统及液压元件介绍
一、液压系统的组成：动力部分、控制部分、执行部分、辅助装置    液压泵；用以将机械能转化为液体的压力能，有时也将蓄能器作为紧急或辅助动力源
各类压力、流量、方向等控制阀；用以实现对执行元件的运动速度、方向、作用力等的控制、也用于实现过载保护、程序控制等
液压缸、液压马达等；用以将液体压力转化为机械能
管路、蓄能器、过滤器、油箱、冷却器、加热器、压力表、流量计等    
二、液压传动的优点 质量轻体积小 容易实现无级调速 易于实现过载保护 液压元件能够自动润滑 简化机构 便于实现自动化 
三、液压传动的缺点 液压元件制造精度要求高 实现定比传动困难 油液受温度的影响 不适宜远距离输送动力 油液中混入空气易影响工作性能 油液容易污染 发生故障不易检查和排除。 四、液压部件及图形符号 


液压是机械行业、机电行业的一个名词。液压可以用动力传动方式， 成为液压传动。液压也可用作控制方式，称为液压控制。
液压传动是以液体作为工作介质，利用液体的压力能来传递动力。
液压控制是以有压力液体作为控制信号传递方式的控制。用液压技术构成的控制系统称为液压控制系统。液压挖制通常包括液压开环挖制和液压闭环控制。液压闭环挖制也就是液压伺服控制，它构成液压伺服系统，通常包括电气液压伺服系统(电液伺服系统)和机械液压同服系统(机液伺服系统，或机液伺服机构)等。
一个完整的液压系统由五个部分组成，即能源装置、执行装置、控制调节装置、辅助装置、液体介质。液压由于其传递动力大，易于传递及配置等特点，在工业、民用行业应用广泛。液压系统的执行元件(液压缸和液压马达)的作用是将液体的压力能转换为机械能，从而获
得需要的直线往复运动或回转运动。液压系统的能源装置(液压泵)的作用是将原动机的机械能转换成液体的压力能。
液压系统组成
一个完整的液压系统由五个部分组成，即动力元件、执行元件、控制元件、辅助元件和工作介质。
动力元件的作用是将原动机的机械能转换成液体的压力能。动力元件指液压系统中的液压泵，它向整个液压系统提供动力。液压泵的结构形式一般有齿轮泵、叶片泵、柱塞泵、螺杆泵。
执行元件的作用是将液体的压力能转换为机械能，驱动负载作直线往复运动或回转运动。执行元件有液压缸和液压马达。
挖制元件(即各种液压阀)在液压系统中控制和调节液体的压力、流量和方向。