In this article, the factors that affect the max. permissible differential pressure of Roots vacuum pump are discussed. The methods of increasing it are discussed together.

文章分析了影响提高罗茨真空泵最大允许压差因素，提出了解决方法。

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Modern axial piston pump in terms of its operating parameters, because of its work pressure and speed continues increasing, the noise index requirements become more stringent.

现代轴向柱塞泵，就其工作参数而言，由于其工作压力和转速不断提高，对噪声指标要求越来越严格。

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Through the analysis of the co-simulation results: (1) During the raising leg stage and early raising leg stage, when the pump pressure constants, increasing the flow can short the time of rising leg.

通过联合仿真与结果分析得出：（1）在升柱和初撑阶段，当泵站调定压力恒定时，增加泵站的流量可显著缩短升柱时间。

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