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
②采用液控单向西的平衡回路
因为铜只有在液庄红I上腔的压力达到液控单向[故障11 液压就在低负载下行时，平国性差3的控制压力值，阀③便关闭，1回油受阳便不能下行，向阀3的控制压力时才能开启。而当处惠
小时，门上数的压力可能达不到阀3
使缸1上腔的压力又升高，阀3又可打开缸1向下运动，负载义但此时液压就还在不断供油，
变小又便红上整压力降下来，阀3又关团，1文停止运动。如此不断交替出现， 红1无法障到在低负载下的平隐运动，而是向下闻歇式前进，类似爬行。
为了提高运动平稳性，可在围8-62中的调3和阀2之间的管路上加接单向顾序阀，可摸高运动的平稳性。
[故障21液压缸下腔产 生增压事故
在图 852所示的回路中，如果设计时不注意，将液压缸1上下腔的作用面积之比A:A.大于液控单向阀3的控制活塞作用面积As与单向西上部作用面积A.之比(DFY型液控单向阀)A A,=(33-25) 1, IY型被控单向阀 As A.-(6.25-4.69) 1.例如如果A:A,24: 1(使用DFY型阀)，成者Ap:A;≥7: 1(对IY型)，则液控单向阀将水远打不开，此时液压缸1将如同一个增压器一样，缸1.下腔将严重增压，下腔压力相应为上腔压力的4倍(对DEY阀)或者7倍(对IY阀)，造成液压缸下腔增压事故。
解决办法是液压缸1在设计时，应合理选择上下腔的工作面积，保证A:: As< AsFA[故障31被压缸下行过程中发 生高频或低频振动
如图8-63 (a) 所示采用液控单向阀构成的平衡回路中，在活塞组件(W)下降时，可能出现两种振动:一是高频小报福振动并伴有很大的尖叫声:二是低额大振幅振动。前者是液控单向阀本身的共振现象，后者则是包含液控单向网在内的整个液压系统的共振现象。
a高频援动。如在图53 (b)所示位置时，液控单向阀的控制压力上升，控制话塞顶开(向左)单向阀，液压缸下腔开始有油液流往油池。由于 背压和冲击压力的影响，单向阀回抽腔压力解时上升:又由于液控单向阀为内泄式，此上开的压力(作用在控制活寨左端)比作用在控制活塞右端的控制压力大时，推回(向右控制活基，使单向阀关闭。单向阀关团， 回油整的油液停止流动，压力下降，控制活寒又推开单向调，这种频繁的重复导致高频振动并伴随尖叫声。
b低频振动。当活塞在重物 w的作用下下降时，由于波控单向阀全开，下腔又无背压，很可能接近自由落体，重物下降很快，使系来不及填充液压缸上腔，导致液压虹上腔压力降低，甚至产生真空，液控单向调因控制压力下降而关闭。
主要原因基液压战活塞杆密封的外泄调男外可将两4改为减控单向间对防止缓慢下滑有益，决这些泄湖使可非除故障，
②采用液控单向西的平衡回路
因为铜只有在液庄红I上腔的压力达到液控单向[故障11 液压就在低负载下行时，平国性差3的控制压力值，阀③便关闭，1回油受阳便不能下行，向阀3的控制压力时才能开启。而当处惠
小时，门上数的压力可能达不到阀3
使缸1上腔的压力又升高，阀3又可打开缸1向下运动，负载义但此时液压就还在不断供油，
变小又便红上整压力降下来，阀3又关团，1文停止运动。如此不断交替出现， 红1无法障到在低负载下的平隐运动，而是向下闻歇式前进，类似爬行。
为了提高运动平稳性，可在围8-62中的调3和阀2之间的管路上加接单向顾序阀，可摸高运动的平稳性。
[故障21液压缸下腔产 生增压事故
在图 852所示的回路中，如果设计时不注意，将液压缸1上下腔的作用面积之比A:A.大于液控单向阀3的控制活塞作用面积As与单向西上部作用面积A.之比(DFY型液控单向阀)A A,=(33-25) 1, IY型被控单向阀 As A.-(6.25-4.69) 1.例如如果A:A,24: 1(使用DFY型阀)，成者Ap:A;≥7: 1(对IY型)，则液控单向阀将水远打不开，此时液压缸1将如同一个增压器一样，缸1.下腔将严重增压，下腔压力相应为上腔压力的4倍(对DEY阀)或者7倍(对IY阀)，造成液压缸下腔增压事故。
