As a new type of fluid machinery, the disc-seal single screw pump (DSSP) is vital for energy conversion in oil sludge energy recovery systems and natural gas liquefaction system due to the advantages of wide flow range, strong self-absorption and well adaptability to organic solid impurities. However, no research work has focused on the working mechanism and performance of this pump at present, which makes its application limited. In view of this, the in-depth theoretical study on the meshing characteristics and operating performance of the DSSP must be carried out. In this paper, the profile equations of the meshing pair and the working process mathematical model were established for the first time based on three-dimensional space meshing theory, coordinate transformation principle. By using this model, the working performance of this pump was investigated, and the influence mechanism of the profile parameters on the theoretic volume was analyzed. The results of the analysis show that DSSP has the best leakage characteristics when the seal disc rotation center fell on the screw rotor touchline. All these analyses can provide the theory basis for improving the performance of the pump and optimized design of the meshing pair.

作为一种新型的流体机械，圆盘密封单螺杆泵（DSSP）具有流量范围广，自吸收能力强，适应性强等优点，对于油泥能量回收系统和天然气液化系统中的能量转换至关重要。去有机固体杂质。但是，目前尚无关于该泵的工作机理和性能的研究工作，其应用受到限制。有鉴于此，必须对DSSP的啮合特性和操作性能进行深入的理论研究。本文基于三维空间啮合理论，坐标变换原理，首次建立了啮合对的轮廓方程和工作过程数学模型。通过使用此模型，研究了该泵的工作性能，分析了轮廓参数对理论体积的影响机理。分析结果表明，当密封盘旋转中心落在螺杆转子接触线上时，DSSP具有最佳的泄漏特性。所有这些分析可以为改善泵的性能和优化啮合对的设计提供理论依据。