低流量小型二重回転スクリューポンプの性能向上に関する研究

(漏れ損失の低減に関する検討)

抄録

Centrifugal pumps designed for operation in low flow rate have various application such as medical, food processing, chemicals, and manufacturing. However, the efficiency of low flow rate pump is lower than the industrial pumps in general. Therefore, a double rotation screw pump that was different from the centrifugal one was developed to improve the pump performance. In a this pump, the stator rotates passively as the rotor rotates. Therefore, there are two structural gaps: one between the rotor and stator, and the other between the stator and casing. To more improve the efficiency of this pump, it is necessary to reduce leakage losses. In this study, we focused on the gap between the stator and casing and aimed to improve pump efficiency by filling this area several greases to reduce leakage losses.