意大利MARZOCCHI马祖奇齿轮泵，风力发电泵，液压高压油泵
ALP1A-D-11，ALP1A-D-11-FG，ALP1A-D-13，ALP1A-D-13-FG，ALP1A-D-16，ALP1A-D-16-FG，ALP1A-D-2，ALP1A-D-20，ALP1A-D-20-FG，ALP1A-D-2-FG，ALP1A-D-3，ALP1A-D-3-FG，ALP1A-D-4，ALP1A-D-4-FG，ALP1A-D-5，ALP1A-D-5-FG，ALP1A-D-6，ALP1A-D-6-FG，ALP1A-D-7，ALP1A-D-7-FG，ALP1A-D-9，ALP1A-D-9-FG，ALP1-D-11，ALP1-D-11-FG，ALP1-D-13，ALP1-D-13-FG，ALP1-D-16，ALP1-D-16-FG，ALP1-D-2，ALP1-D-20，ALP1-D-20-FG，ALP1-D-2-FG，ALP1-D-3，ALP1-D-3-FG，ALP1-D-4，ALP1-D-4-FG，ALP1-D-5，ALP1-D-5-FG，ALP1-D-6，ALP1-D-6-FG，ALP1-D-7，ALP1-D-7-FG，ALP1-D-9，ALP1-D-9-FG，ALP2A-D-10，ALP2A-D-10-FG，ALP2A-D-12，ALP2A-D-12-FG，ALP2A-D-13，ALP2A-D-13-FG，ALP2A-D-16，ALP2A-D-16-FG，ALP2A-D-20，ALP2A-D-20-FG，ALP2A-D-22，ALP2A-D-22-FG，ALP2A-D-25，ALP2A-D-25-FG，ALP2A-D-30，ALP2A-D-30-FG，ALP2A-D-34，ALP2A-D-34-FG，ALP2A-D-37，ALP2A-D-37-FG，ALP2A-D-40，ALP2A-D-40-FG，ALP2A-D-50，ALP2A-D-50-FG，ALP2A-D-6，ALP2A-D-6-FG，ALP2A-D-9，ALP2A-D-9-FG，ALP2-D-10，ALP2-D-10-FG，ALP2-D-12，ALP2-D-12-FG，ALP2-D-13，ALP2-D-13-FG，ALP2-D-16，ALP2-D-16-FG，ALP2-D-20，ALP2-D-20-FG，ALP2-D-22，ALP2-D-22-FG，ALP2-D-25，ALP2-D-25-FG，ALP2-D-30，ALP2-D-30-FG，ALP2-D-34，ALP2-D-34-FG，ALP2-D-37，ALP2-D-37-FG，ALP2-D-40，ALP2-D-40-FG，ALP2-D-50，ALP2-D-50-FG，ALP2-D-6，ALP2-D-6-FG，ALP2-D-9，ALP2-D-9-FG，ALP3A-D-110，ALP3A-D-120，ALP3A-D-135，ALP3A-D-30，ALP3A-D-33，ALP3A-D-40，ALP3A-D-50，ALP3A-D-60，ALP3A-D-66，ALP3A-D-80，ALP3A-D-94，ALP3-D-110，ALP3-D-120，ALP3-D-135，ALP3-D-30，ALP3-D-33，ALP3-D-40，ALP3-D-50，ALP3-D-60，ALP3-D-66，ALP3-D-80，ALP3-D-94，GHP1A2-D-11，GHP1A2-D-13，GHP1A2-D-16，GHP1A2-D-2，GHP1A2-D-20，GHP1A2-D-3，GHP1A2-D-4，GHP1A2-D-5，GHP1A2-D-6，GHP1A2-D-7，GHP1A2-D-9，GHP1A-D-11，GHP1A-D-11-RA，GHP1A-D-13，GHP1A-D-13-RA，GHP1A-D-16，GHP1A-D-16-RA，GHP1A-D-20，GHP1A-D-20-RA，GHP1A-D-2-RA，GHP1A-D-3，GHP1A-D-3-RA，GHP1A-D-4，GHP1A-D-4-RA，GHP1A-D-5，GHP1A-D-5-RA，GHP1A-D-6，GHP1A-D-6-RA，GHP1A-D-7，GHP1A-D-7-RA，GHP1A-D-9，GHP1AQ-D-11，GHP1AQ-D-13，GHP1AQ-D-16，GHP1AQ-D-2，GHP1AQ-D-20，GHP1AQ-D-3，GHP1AQ-D-4，GHP1AQ-D-5，GHP1AQ-D-6，GHP1AQ-D-7，GHP1AQ-D-9，GHP1-D-11，GHP1-D-11-RA，GHP1-D-13，GHP1-D-13-RA，GHP1-D-16，GHP1-D-16-RA，GHP1-D-2，GHP1-D-20，GHP1-D-20-RA，GHP1-D-2-RA，GHP1-D-3，GHP1-D-3-RA，GHP1-D-4，GHP1-D-4-RA，GHP1-D-5，GHP1-D-5-RA，GHP1-D-6，GHP1-D-6-RA，GHP1-D-7，GHP1-D-7-RA，GHP1-D-9，GHP2A3-D-10，GHP2A3-D-12，GHP2A3-D-13，GHP2A3-D-16，GHP2A3-D-20，GHP2A3-D-22，GHP2A3-D-25，GHP2A3-D-30，GHP2A3-D-34，GHP2A3-D-37，GHP2A3-D-40，GHP2A3-D-50，GHP2A3-D-6，GHP2A3-D-9，GHP2A-D-10，GHP2A-D-10-FG，GHP2A-D-10-KA，GHP2A-D-12，GHP2A-D-12-KA，GHP2A-D-13，GHP2A-D-13-FG，GHP2A-D-13-KA，GHP2A-D-16，GHP2A-D-16-FG，GHP2A-D-16-KA，GHP2A-D-20，GHP2A-D-20-FG，GHP2A-D-20-KA，GHP2A-D-22，GHP2A-D-22-FG，GHP2A-D-22-KA，GHP2A-D-25，GHP2A-D-25-FG，GHP2A-D-25-KA，GHP2A-D-30，GHP2A-D-30-FG，GHP2A-D-34，GHP2A-D-34-FG，GHP2A-D-37，GHP2A-D-40，GHP2A-D-40-FG，GHP2A-D-50，GHP2A-D-50-FG，GHP2A-D-6，GHP2A-D-6-FG，GHP2A-D-6-KA，GHP2A-D-9，GHP2A-D-9-FG，GHP2A-D-9-KA，GHP2-D-10，GHP2-D-12，GHP2-D-13，GHP2-D-16，GHP2-D-20，GHP2-D-22，GHP2-D-25，GHP2-D-30，GHP2-D-34，GHP2-D-37，GHP2-D-40，GHP2-D-50，GHP2-D-6，GHP2-D-9，GHP3A2-D-110，GHP3A2-D-120，GHP3A2-D-135，GHP3A2-D-30，GHP3A2-D-33，GHP3A2-D-40，GHP3A2-D-50，GHP3A2-D-60，GHP3A2-D-66，GHP3A2-D-80，GHP3A2-D-94，GHP3A-D-110，GHP3A-D-110-FG，GHP3A-D-120，GHP3A-D-120-FG，GHP3A-D-135，GHP3A-D-135-FG，GHP3A-D-30，GHP3A-D-30-FG，GHP3A-D-33，GHP3A-D-33-FG，GHP3A-D-40，GHP3A-D-40-FG，GHP3A-D-50，GHP3A-D-50-FG，GHP3A-D-60，GHP3A-D-60-FG，GHP3A-D-66，GHP3A-D-66-FG，GHP3A-D-80，GHP3A-D-80-FG，GHP3A-D-94，GHP3A-D-94-FG，GHP3-D-110，GHP3-D-120，GHP3-D-135，GHP3-D-30，GHP3-D-33，GHP3-D-40，GHP3-D-50，GHP3-D-60，GHP3-D-66，GHP3-D-80，GHP3-D-94
液压系统常见保压回路
液压系统油路中保压回路可使执行元件在某个工作阶段内的压力保持恒定不变。今天主要给大家介绍下常见的几个保压回路。
(1)用限压式变量泵保压的回路
图7-55中液压缸直接由限压式变量泵补油，可以长期保持压力稳定。变量泵输油量能随需要自动调整，回路效率较高。
(2)用蓄能器的保压回路
图7-56中蓄能器中的高压油与液压油缸高压腔相通，补偿系统的泄漏。蓄能器出口有单向节流阀，其作用是防止换向阀切换时，蓄能器突然泄压而造成冲击。本回路适用于保压时间长、压力稳定性要求高的场合。
(3)用液控单向阀的保压回路
图7-57中，在缸的进油路上串联一个液控单向阀，利用锥形阀座的密封性能实现保压。若采用电接触式压力表，可控制压力波动范围和补压动作。
当压力上升至上触点调定压力时。上触点接通，IDT断电，泵卸载，系统由液控单向阀保压。当压力下降至下触点调定压力时、1DT通电，泵又供油，使压力回升。该回路适于保压时间不太长、保压稳定性要求不太高（压力变化为1～2MPa），但要求功率损失较小的场合。
(4) 一缸动作一缸保压的回路
图7-58中液压缸2由在运动中的液压缸的回油腔持续补油保压，压力大小由背压阀3调定。该回路保压质量高，但功率损失大，只适用于一缸动作一缸保压的场合。
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