20V2A-1C22R叶片泵

20V2A 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   
3525V 20V2A-86A22R 20V2A-86B22R 20V2A-86C22R 20V2A-86D22R
4535V 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



在吸油腔和压油腔之间有一段封油区，把吸油腔和压油腔隔开。这种叶片泵每转一周，每个工作腔就完成一次吸油和压油，因此称之为单作用叶片泵。转子1不停地旋转，泵就不断地吸油和排油。

    改变转子1与定子2的偏心量，即可改变泵的流量。偏心量越大，流量越大。若将转子1与定子2调成几乎是同心的，则流量接近于零。因此单作用叶片泵大多为变量泵。

    另外还有一种限压式变量泵。当负荷小时，泵输出流量大，执行元件可快速移动；当负荷增加时，泵输出流量变少，输出压力增加，执行元件速度降低。如此可减少能量消耗，避免油温上升。


双作用叶片泵

    双作用叶片泵的工作原理如图2-11所示。定子内表面近似椭圆，转子1和定子4同心安装，有2个吸油区和2个压油区对称布置。转子1每转一周，完成2次吸油和压油。双作用叶片泵大多是定量泵。叶片泵的结构较齿轮泵复杂，但其工作压力较高，且流量脉动小，工作平稳，噪声较小，寿命较长。所以它被广泛应用于机械制造中的**机床、自动线等中、低压液压系统中。但其结构复杂，吸油特性不太好，对油液的污染也比较敏感。


双作用叶片泵的结构特点：

??(1)这种泵由于叶片数一般为4的整数倍，两个吸油区和两个排油区是对称布置的，所以作用在转子上的液压径向力相互平衡，属于卸荷式叶片泵。

??(2)双作用叶片泵在结构上做成两叶片间的夹角(即圆心角2π/z，z为叶片数)小于配油盘上封油区的夹角s(即圆心角)，以防止吸、排油窗口沟通而不能工作;定子圆弧区的圆心角大于或等于配油盘上封油区的圆心角，使叶片间的容积在封油区内不变，故双作用口十片泵无困油现象


为减小泵的密封间隙，提高密封性能，结构上采取的主要措施是：通过泵体的固定螺栓使两个配油盘与定子端面压紧，保持配油盘与转子、叶片侧端面间轴向间隙较小，其中右配油盘7背面的油槽e通排油腔，靠排出油压从右侧抵紧定子。因转子的径向力白干平衡，泵轴工作时不发生弯曲变形，故轴向间隙可以控制得较小。其次，在两个配油盘的端面各开设一个环形导油槽f，对准各叶片底部的空间6，使所有的叶根空间相连通，并经右配油盘的轴向导油孔与泵的排油腔连通。这样，保证叶根处有一定的油压。当叶片随转子转人吸人区时，靠叶根处油压力和离心力共同作用把叶片**向定子的内表面，从而保持叶片*与定子内壁面间的径向间隙较小。在排油区，叶片两端都受排油压力作用而液压力平衡，这时叶片受定子表面作用而压人槽内，只靠离心力就足以使叶片*抵紧定子内表面而满足密封要求。