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20V2A 20V2A-1A22R 20V2A-1B22R 20V2A-1C22R 20V2A-1D22R
20V3A 20V3A-1A22R 20V3A-1B22R 20V3A-1C22R 20V3A-1D22R
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20V5A 20V5A-1A22R 20V5A-1B22R 20V5A-1C22R 20V5A-1D22R
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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
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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
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35V21A 35V21A-1A22R 35V21A-1B22R 35V21A-1C22R 35V21A-1D22R
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35V35A 35V35A-1A22R 35V35A-1B22R 35V35A-1C22R 35V35A-1D22R
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45V42A 45V42A-1A22R 45V42A-1B22R 45V42A-1C22R 45V42A-1D22R
45V45A 45V45A-1A22R 45V45A-1B22R 45V45A-1C22R 45V45A-1D22R
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2520V
3525V 20V2A-86A22R 20V2A-86B22R 20V2A-86C22R 20V2A-86D22R
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20V5A-86A22R 20V5A-86B22R 20V5A-86C22R 20V5A-86D22R
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20V7A-86A22R 20V7A-86B22R 20V7A-86C22R 20V7A-86D22R
20V8A-86A22R 20V8A-86B22R 20V8A-86C22R 20V8A-86D22R
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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专用机床、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.