武汉恒斯源液压机电设备有限公司
 
A11VLO145HD2/11L-NTD12N00，A11VO75LR/10L-NPG12N00，A11VLO145DRL/11R-NSG12N00

A11VO145EP1/11L-NSD12N00，A11VO130EP.D/10R-NTD12N00，A11VO75DRS/10R-NZD12N00

A11VLO260HD.D/11L-NPG12N00，A11VLO145DRS/11L-NTD12N00，A11VO260DRS/11L-NPD12N00

A11VLO260HD1/11L-NSD12N00，A11VLO260EP1/11L-NTD12N00，A11VLO190LE1/11R-NPC12N00

A11VO130LR.C/10R-NSD12N00，A11VLO145EP2/11R-NTC12N00，A11VLO190LG1/11L-NTD12N00

A11VLO130LR3/10R-NZC12N00，A11VLO260EP.G/11L-NPC12N00，A11VO130LG2/10R-NTC12N00

A11VLO190LR.C/11R-NZC12N00，A11VO190HD2/11L-NTD12N00，A11VLO260LR/11L-NTD12N00

A11VLO260LR.C/11L-NSC12N00，A11VO190DRG/11R-NTC12N00，A11VO60EP2/10R-NTG12N00

A11VO40EP1/10L-NPD12N00，A11VO40EP.G/10L-NSC12N00，A11VO40DRL/10R-NPG12N00

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齿轮泵要平稳工作，齿轮啮合的重合度必须大于1，于是总有两对齿轮同时啮合，并有部分油液被围困在两对轮齿所围成的封闭容腔之间。这个封闭的容腔开始随着齿轮的转动逐渐减小，以后又逐渐加大。封闭腔容积的减小会使被困油液受挤压而产生很高的压力，并且从缝隙中挤出，导致油液发热，并致使机件受到额外的负载；而封闭腔容积的增大又造成局部真空，使油液中溶解的气体分离，产生气穴现象。这些都将产生强烈的振动和噪声，这就是齿轮泵的困油现象。。

新闻：A11VLO190HD2/11L-NPG12N00柱塞泵的拆装实验报告：http://www.jdzj.com/jdzjnews/k3_11292998.html