力士乐REXROTH齿轮泵R9009688154WRZ25R325-7X/6EG24N9EK4/D3V

德国力士乐REXROTH齿轮泵0510525018力士乐REXROTH齿轮泵是依靠泵缸与啮合齿轮间所形成的工作容积变化和移动来输送液体或使之增压的回转泵。由两个齿轮、泵体与前后盖组成两个封闭空间，当齿轮转动时，齿轮脱开侧的空间的体积从小变大，形成真空，将液体吸入，齿轮啮合侧的空间的体积从大变小，而将液体挤入管路中去。吸入腔与排出腔是靠两个齿轮的啮合线来隔开的。力士乐REXROTH齿轮泵的排出口的压力*取决于泵出处阻力的大小。zui基本形式就是两个尺寸相同的齿轮在一个紧密配合的壳体内相互啮合旋转，这个壳体的内部类似“8”字形，两个齿轮装在里面，齿轮的外径及两侧与壳体紧密配合。来自于挤出机的物料在吸入口进入两个齿轮中间，并充满这一空间，随着齿的旋转沿壳体运动，zui后在两齿啮合时排出。
力士乐REXROTH齿轮泵也叫正排量装置，即像一个缸筒内的活塞，当一个齿进入另一个齿的流体空间时，液体就被机械性地挤排出来。因为液体是不可压缩的，所以液体和齿就不能在同一时间占据同一空间，这样，液体就被排除了。由于齿的不断啮合，这一现象就连续在发生，因而也就在泵的出口提供了一个连续排除量，泵每转一转，排出的量是一样的。随着驱动轴的不间断地旋转，泵也就不间断地排出流体。泵的流量直接与泵的转速有关。
在泵内有很少量的流体损失，这使泵的运行效率不能达到*，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*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zui弱的部件的机械极限(通常装有一个扭矩限制器)。
PEP－II泵的齿轮与轴共为一体，采用通体淬硬工艺，可获得更长的工作寿命。“D”型轴承结合了强制润滑机理，使聚合物经轴承表面，并返回到泵的进口侧，以确保旋转轴的有效润滑。这一特性减少了聚合物滞留并降解的可能性。精密加工的泵体可使“D”型轴承与齿轮轴精确配合，确保齿轮轴不偏心，以防齿轮磨损。Parkool密封结构与聚四氟唇型密封共同构成水冷密封。这种密封实际上并不接触轴的表面，它的密封原理是将聚合物冷却到半熔融状态而形成自密封。也可以采用Rheoseal密封，它在轴封内表上加工有反向螺旋槽，可使聚合物被反压回到进口。为便于安装，制造商设计了一个环形螺栓安装面，以使与其它设备的法兰安装相配合，这使得筒形法兰的制造更容易。
PGH型内啮合力士乐REXROTH齿轮泵
定量泵
定排量
低噪声
低的流量脉动
由于采用间隙密封的补偿即使在低速和低粘度油液时也有高的效率，适用于广范围的各种粘度和转速所有规格可自由组合组成组合泵能和PGF型内力士乐REXROTH齿轮泵、轴向柱塞泵和叶片泵组成多联泵
能用HFC液体工作（密封件型号W）
PGH型液压泵是泄漏间隙补偿结构的定排量内啮合力士乐REXROTH齿轮泵。
它的主要组成部分有泵体(1)，轴承(1 1)，内齿轮(2)，带轴外齿轮(3)，滑动轴承(4)，前、后盖(5)，端盖(6)，安装法兰(7)，和定位销(8)以及由弧形体(9 1)、支架(9 2)和密封垫(9 3)组成的弧形元件(9)。暧入和排出原理支承在油膜轴承上的带轴外齿轮(3)驱动内齿轮(2)以一定的方向转动。转动时，在约90 e范围的吸油区内体积增加。产生吸力，流体进入吸油区。月牙形的弧形元件(9)将吸油腔和排油腔隔开。在排油腔外齿轮(3)的齿和内齿轮(2)齿啮合，流体就从排油腔(P)排出。轴向间隙补偿，轴向补偿力FA由前、后盖(5)间的压力场(10)产生，作用在排油腔内的轴向浮动板上。由于工作压力的作用，这两个弧形元件(9 1)和(9 2)压向外齿轮(3)和内f 2）的齿顶。弧形体和弧形支架的面积比和密封圈(g 3)的位置设计得使内齿轮(2)、弧形体(9)和外齿轮(3)之间达到可靠的密封。弹性元件密封圈(9 3)能保证即使在很低的压力下这些元件间也有适当的接触压力。液*承和油膜轴承作用在带轴外齿轮(3)上的力由油膜润滑的径向滑动轴承(4)承受；作周在内齿轮(2)上的力由静*承(11)承受。
两个齿轮均为渐开线式齿轮加工，较长的啮合长度使泵的排量和压力脉动较小。这使泵的运行噪声大大降低。

力士乐REXROTH齿轮泵R9009688154WRZ25R325-7X/6EG24N9EK4/D3V
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