以石英砂为试料研究了一种新型加冲洗水圆柱型旋流器的分级性能，并运用水力旋流器的流场理论对其分级原理进行了探讨。结果表明，它可以在底流浓度与普通圆柱旋流器基本一致且操作稳定的情况下，显著提高旋流器的分级效率。最大分级效率可达８８．１２％，分别比普通圆柱旋流器和普通圆锥旋流器高出１３．６２％和１９．７０％。 Using quartz sand as sample, the grading performance of a new type of flushing hydrocyclone was studied. The classification theory was discussed by using hydrocyclone flow field theory. The results show that it can significantly improve the classification efficiency of the cyclone under the condition that the underflow concentration is basically the same as that of the ordinary cylinder cyclone and the operation is stable. The maximum classification efficiency is up to 88.12%, which is 13.62% and 19.70% higher than that of ordinary cylindrical hydrocyclone and ordinary conical cyclone respectively.