2017/12/28 13:26:40 来源： 武汉富泰盛机电设备有限公司
对于一台齿轮泵的转速，实际上是有限制的，这主要取决于工艺流体，如果传送的是油类，泵则能以很高的速度转动，但当流体是一种高粘度的聚合物熔体时，这种限制就会大幅度降低。 推动高粘流体进入吸入口一侧的两齿空间是非常重要的，如果这一空间没有填充满，则泵就不能排出准确的流量，所以PV值(压力×流速)也是另外一个限制因素，而且是一个工艺变量。由于这些限制，齿轮泵制造商将提供一系列产品，即不同的规格及排量(每转一周所排出的量)。这些泵将与具体的应用工艺相配合，以使系统能力及价格达到最优。
877型号柳工装载机用4525VQHSV10S 42AM21S5S 497BAA 32R
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实际上，在泵内有很少量的流体损失，这使泵的运行效率不能达到100％，因为这些流体被用来润滑轴承及齿轮两侧，而泵体也绝不可能无间隙配合，故不能使流体100％地从出口排出，所以少量的流体损失是必然的。然而泵还是可以良好地运行，对大多数挤出物料来说，仍可以达到93％～98％的效率。
对于粘度或密度在工艺中有变化的流体，这种齿轮泵不会受到太多影响。如果有一个阻尼器，比如在排出口侧放一个滤网或一个限制器，泵则会推动流体通过它们。如果这个阻尼器在工作中变化，亦即如果滤网变脏、堵塞了，或限制器的背压升高了，则泵仍将保持恒定的流量，直至达到装置中最弱的部件的机械极限(通常装有一个扭矩限制器)。
4525VQHSV10S-42AM21S5S-497BAA-32R
4525VQHSV10S42AM21S5S497BAA32R
1.齿轮泵 轴磨损后的维修
齿轮泵中轴的磨损主要是因为轴两端与支撑滚针间的摩擦磨损，使轴径变小。如果是轻微磨损，可通过镀一层硬铬来加大此部位轴的直径尺寸，使轴得到修复。如果轴磨损严重，则应45钢或40cr钢重新制造，轴毛坯经粗、精车后，轴承部位要热处理， 硬度为hrc60-65，然后再经磨削，使轴承配合部位表面粗糙度 ra不大于0.32μm;轴的圆度和圆柱度允差为0.005mm;与齿轮配合部位按h7/h6、表面粗糙度ra应不大于0.63μm。 2.齿轮泵泵体磨损后的维修
泵体内表面磨损主要是吸油区段圆弧形工作面.如果出现轻微磨损，可用油石修磨去毛刺后使用。泵体是由铸铁铸造毛坯成型， 出现严重磨损时应更换新件。如果泵内齿轮两端面是用磨削修复， 则泵体宽度尺寸也要改变，与齿轮两端修磨去掉的尺寸相等，重新加工后的泵体两端面应达到图3所示的技术要求。
3.齿轮泵两端盖磨损之后的维修
齿轮泵的端盖用铸铁制造，出现磨损现象后，轻微的可在平板上研磨修平，磨损比较严重时应在平面磨床上磨削修平。修磨后的端盖与泵体配合连接的平面接触应不低于85%.平面度允差、端面对孔中心线的垂直度允差、两端面的平行度允差和两轴孔中心线的平行度允差均为o.olmm。磨削后的表面粗糙度ra应不大于1. 5μm。
4.齿轮泵泵用滚针轴承的维修更换
泵中零件维修后，轴承滚针应更换。对滚针要求是：全部滚针直径的尺寸误差不应超过0.003mm，长度允差为0.1mm，与轴配合间隙应在o.olmm左右;滚针装配时要按数量要求充满轴承壳内，滚针间要相互平行布置。
徐工50G装载机工作泵 1155442011徐工50G装载机工作泵 1155442011徐工50G装载机工作泵 1155442011P124-G16X内田三联齿轮泵GPP1-50/40/40R.113
898995850
