20V2A   叶片泵
20V2A-1A22R
 20V2A-1B22R
 20V2A-1C22R
 20V2A-1D22R
20V3A
 20V3A-1A22R
 20V3A-1B22R 
20V3A-1C22R
 20V3A-1D22R
20V4A
 20V4A-1A22R
 20V4A-1B22R
 20V4A-1C22R
 20V4A-1D22R
20V5A
 20V5A-1A22R
 20V5A-1B22R 
20V5A-1C22R
 20V5A-1D22R
20V6A
 20V6A-1A22R
 20V6A-1B22R 
20V6A-1C22R 
20V6A-1D22R
20V7A
 20V7A-1A22R
 20V7A-1B22R 
20V7A-1C22R
 20V7A-1D22R
20V8A 
20V8A-1A22R
 20V8A-1B22R 
20V8A-1C22R
 20V8A-1D22R
20V9A
 20V9A-1A22R 
20V9A-1B22R 
20V9A-1C22R 
20V9A-1D22R
20V10A 
20V10A-1A22R 
20V10A-1B22R
 20V10A-1C22R
 20V10A-1D22R
20V11A
 20V11A-1A22R
 20V11A-1B22R 
20V11A-1C22R
 20V11A-1D22R
20V12A 
20V12A-1A22R 
20V12A-1B22R 
20V12A-1C22R
 20V12A-1D22R
20V14A
 20V14A-1A22R 
20V14A-1B22R 
20V14A-1C22R
 20V14A-1D22R
25V10A
 25V10A-1A22R 
25V10A-1B22R 
25V10A-1C22R 
25V10A-1D22R
25V12A 
25V12A-1A22R
 25V12A-1B22R 
25V12A-1C22R 
25V12A-1D22R
25V14A
 25V14A-1A22R
 25V14A-1B22R 
25V14A-1C22R
 25V14A-1D22R
25V15A
 25V15A-1A22R 
25V15A-1B22R
 25V15A-1C22R 
25V15A-1D22R
25V17A
 25V17A-1A22R 
25V17A-1B22R
 25V17A-1C22R 
25V17A-1D22R
25V19A
 25V19A-1A22R
 25V19A-1B22R
 25V19A-1C22R
 25V19A-1D22R
25V21A 
25V21A-1A22R
 25V21A-1B22R 
25V21A-1C22R
 25V21A-1D22R
35V21A
 35V21A-1A22R
 35V21A-1B22R 
35V21A-1C22R
 35V21A-1D22R
35V25A
 35V25A-1A22R
 35V25A-1B22R 
35V25A-1C22R
 35V25A-1D22R
35V30A
 35V30A-1A22R 
35V30A-1B22R
 35V30A-1C22R 
35V30A-1D22R
35V32A 
35V32A-1A22R
 35V32A-1B22R 
35V32A-1C22R 
35V32A-1D22R
35V35A
 35V35A-1A22R
 35V35A-1B22R
 35V35A-1C22R
 35V35A-1D22R
35V38A
 35V38A-1A22R 
35V38A-1B22R 
35V38A-1C22R
 35V38A-1D22R
45V42A
 45V42A-1A22R
 45V42A-1B22R
 45V42A-1C22R 
45V42A-1D22R
45V45A
 45V45A-1A22R
 45V45A-1B22R 
45V45A-1C22R 
45V45A-1D22R
45V50A 
45V50A-1A22R
 45V50A-1B22R 
45V50A-1C22R
 45V50A-1D22R
45V57A 
45V57A-1A22R
 45V57A-1B22R
 45V57A-1C22R 
45V57A-1D22R
45V60A
 45V60A-1A22R
 45V60A-1B22R 
45V60A-1C22R 
45V60A-1D22R
45V66A 
45V66A-1A22R 
45V66A-1B22R 
45V66A-1C22R 
45V66A-1D22R
45V76A 
45V76A-1A22R 
45V76A-1B22R 
45V76A-1C22R 
45V76A-1D22R
2520V双联    
3525V双联
 20V2A-86A22R
 20V2A-86B22R 
20V2A-86C22R
 20V2A-86D22R
4535V双联
 20V3A-86A22R
 20V3A-86B22R 
20V3A-86C22R 
20V3A-86D22R
 20V4A-86A22R 
20V4A-86B22R 
20V4A-86C22R
 20V4A-86D22R
 20V5A-86A22R
 20V5A-86B22R 
20V5A-86C22R 
20V5A-86D22R
 20V6A-86A22R
 20V6A-86B22R
 20V6A-86C22R
 20V6A-86D22R
 20V7A-86A22R
 20V7A-86B22R
 20V7A-86C22R
 20V7A-86D22R
 20V8A-86A22R
 20V8A-86B22R
 20V8A-86C22R
 20V8A-86D22R
 20V9A-86A22R
 20V9A-86B22R
 20V9A-86C22R
 20V9A-86D22R
 20V10A-86A22R
 20V10A-86B22R 
20V10A-86C22R
 20V10A-86D22R
 20V11A-86A22R
 20V11A-86B22R 
20V11A-86C22R 
20V11A-86D22R
 20V12A-86A22R 
20V12A-86B22R
 20V12A-86C22R 
20V12A-86D22R
 20V14A-86A22R 
20V14A-86B22R
 20V14A-86C22R 
20V14A-86D22R
 25V10A-86A22R 
25V10A-86B22R
 25V10A-86C22R 
25V10A-86D22R
 25V12A-86A22R
 25V12A-86B22R 
25V12A-86C22R
 25V12A-86D22R
 25V14A-86A22R
 25V14A-86B22R
 25V14A-86C22R 
25V14A-86D22R
 25V15A-86A22R
 25V15A-86B22R
 25V15A-86C22R
 25V15A-86D22R
 25V17A-86A22R
 25V17A-86B22R 
25V17A-86C22R
 25V17A-86D22R
 25V19A-86A22R
 25V19A-86B22R
 25V19A-86C22R 
25V19A-86D22R
 25V21A-86A22R 
25V21A-86B22R
 25V21A-86C22R
25V21A-86D22R
 35V21A-86A22R
 35V21A-86B22R
 35V21A-86C22R
 35V21A-86D22R
 35V25A-86A22R 
35V25A-86B22R
35V25A-86C22R
 35V25A-86D22R
 35V30A-86A22R
 35V30A-86B22R
 35V30A-86C22R
 35V30A-86D22R
 35V32A-86A22R 
35V32A-86B22R 
35V32A-86C22R 
35V32A-86D22R
 35V35A-86A22R
 35V35A-86B22R
 35V35A-86C22R
 35V35A-86D22R
 35V38A-86A22R
 35V38A-86B22R 
35V38A-86C22R
 35V38A-86D22R
 45V42A-86A22R
 45V42A-86B22R
 45V42A-86C22R
 45V42A-86D22R
 45V45A-86A22R
 45V45A-86B22R
 45V45A-86C22R
 45V45A-86D22R
 45V50A-86A22R
 45V50A-86B22R 
45V50A-86C22R 
45V50A-86D22R
 45V57A-86A22R
 45V57A-86B22R
 45V57A-86C22R 
45V57A-86D22R
 45V60A-86A22R
 45V60A-86B22R 
45V60A-86C22R
 45V60A-86D22R
 45V66A-86A22R
 45V66A-86B22R 
45V66A-86C22R
 45V66A-86D22R
 45V76A-86A22R
 45V76A-86B22R
 45V76A-86C22R 
45V76A-86D22R

进油路:液压泵（武汉星兴达液压气动设备有限公司的液压油泵：液压叶片泵、液压齿轮泵、液压柱塞泵）~换向阀右位~换向阀中位~换向阀右位~升降马达右油口。

回油路:升降马达左油口~平衡阀~换向阀右位~油箱。

3.回转

上车部分的回转是利用一大转矩-通过齿轮、蜗轮减速箱和开式小齿轮(与轮盘上的内齿轮相啮合)驭动转盘旋转而实现的。改变液压系统（小型液压系统、微型液压系统）中的换向阀阀芯的位置就可获得左转、右转和停止三种工况。由于转盘回转速度较低，故不设置马达制动回路。

 

液压传动的一个特色就是可以很方便的实现过载保护，这就是溢流阀在起作用，它是通过阀口的开启溢流，使系统的压力保持恒定或-最高压力。

溢流阀不光可以发挥安全阀的作用，还可以作为调压阀、卸荷阀、背压阀、平衡阀等用途。在系统中作为安全阀使用时，溢流阀为常闭状态，只在系统过载时才开启溢流，以-液压系统的最高压力，保护液压系统或机械结构；在节流阀调速系统中，溢流阀为常开状态，此时溢流阀为调压阀或定压阀，以保持系统的压力恒定。

按照结构不同，溢流阀分为直动式和先导式两种。先导式溢流阀与电磁换向阀复合可构成电磁溢流阀，先导式溢流阀与单向阀复合可构成卸荷溢流阀。

液压测试的目的

判断液压元件的好坏，需要液压试验与测试来验证，但应该把液压试验与测试当成实验科学的一部分来对待，而不是仅当作操作一个试验台、完成一个液压试验。所以，液压试验与测试必须弄清液压元件或系统的试验方法、试验中各种物理量的测量、测量信号的分析与处理，这是进行液压试验与测试的三个主要步骤。