轴向力由副叶片或平衡孔平衡，对于径向力在的规格采取了双壳体设计；

Axial force is balanced by back vane or balanceable hole, for the specification with big radial force; we adopt double-wear passage design.

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单作用叶片泵径向不平衡力是影响其工作压力提高的主要问题。

The imbalance of the radial force of the single action vane pump is a main problem which affects the enhancement of the working pressure.

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通过建立数学模型以消除叶片厚度引起的径向位移误差。

Set up the mathematic model of cover curve to avoid the radial displacement error which evocabled by the thickness of vane.

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