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    挖掘机液压泵注意事项

         液压泵是挖掘机液压系统的动力源,它是将机?#30340;?#36716;换成液压能的能量转换装置。在液压挖掘机中液压泵也是发生?#25910;?#26368;多的元件,而液压泵一旦发生?#25910;?#23601;会立即影响挖掘机液压系统的正常工作,甚至不能工作
      1、齿轮泵常见?#25910;?#20013;,大部分是由其内部摩擦副的磨损而引起的。其正常磨损使径向间隙和轴向间隙(即断面间隙)增大,使齿轮泵内泄漏现象加重,?#29616;?#26102;泵体内孔或两侧板无法修复。此外,轴的密封也是经常损坏的部件。
      2、叶片泵与齿轮泵不同,其正常磨损量很小,零部件使用寿命较长。造成叶片泵?#25910;系?#20027;要原因是油液污染,这是因为叶片泵的运动副配合较精密,当污染物进入摩擦副后,容易产生异常卡滞或磨损。另外,叶片泵的自吸性能不如齿轮泵,特别是小排量的叶片泵更是如此,所以油液是否清洁和吸油是否畅通,是叶片泵运行中需要特别注意的两个问题。
      3、柱塞泵中的径向柱塞泵在结构和运动性能?#31995;?#24369;点是径向力较大、自吸能力较差以及柱塞与柱塞孔的配合精度高;轴向柱塞泵的零件加工精度要求高。所以柱塞泵对油液的清洁度要求高,亦即柱塞泵对油液的过?#21496;?#24230;要求比齿轮泵的高。

    挖掘机液压泵注意事项


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