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    • 8. 发明授权
    • High efficiency gear pump for pumping highly viscous fluids
    • 高效齿轮泵用于泵送高粘度流体
    • US06210139B1
    • 2001-04-03
    • US09398181
    • 1999-09-17
    • Ravi RamanathanRobert E. WrisleyThomas J. ParsonsKun S. Hyun
    • Ravi RamanathanRobert E. WrisleyThomas J. ParsonsKun S. Hyun
    • F04C216
    • F04C13/002F04C2/086
    • A gear pump exhibiting improved efficiency over a broader range of fluid viscosity and pump speed includes a compression zone defined between each of a pair of pump gears and internal walls of a gear chamber, wherein the compression zones have a non-uniform thickness along a longitudinal direction of the gears. The geometry of the compression zones provides a mechanism whereby the drag of the viscous fluid which is induced by the rotation of the pump gears carries the viscous fluid through a progressively narrower gap in the direction of rotation ending in a final smooth pinch-off at the start of the seal zone. The geometry of the compression zone maximizes the drag and pressurization of the viscous fluid being pumped into the teeth of the gears, thereby assisting in the complete filling of the teeth. The result is improved fill efficiency over a broader range of pump speeds and over a broader range of fluid viscosity.
    • 在更宽的流体粘度和泵速范围内显示出提高的效率的齿轮泵包括在一对泵齿轮和齿轮室的内壁之间限定的压缩区域,其中压缩区沿纵向具有不均匀的厚度 齿轮方向。 压缩区的几何形状提供了一种机构,由此由泵齿轮的旋转引起的粘性流体的阻力将粘性流体沿着旋转方向上的逐渐变窄的间隙运送,从而以最终平滑夹紧 开始密封区。 压缩区域的几何形状使得被泵送到齿轮齿中的粘性流体的阻力和加压最大化,从而有助于完全填充牙齿。 结果是在更宽的泵速范围内和在更宽的流体粘度范围内提高了填充效率。