Semi-open centrifugal pump impeller and its optimization design

US11525454B2 · kind B2 · utility

Assignee

• JIANGSU UNIVERSITY · CN

Inventors

• Houlin Liu · 安丰镇, CN
• Kaikai Luo · Zhenjiang, CN
• Zilong Zhang · 安丰镇, CN
• Yong Wang · Beijing, CN
• Kai Wang · 安丰镇, CN
• Liang Dong · Shanghai, CN
• Minggao Tan · Zhenjiang, CN

Key dates

• Filing date: Oct 30, 2019
• Grant date: Dec 13, 2022
• Expiry date: Jan 28, 2041

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2240/303
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A process for optimizing the design of a semi-open centrifugal pump impeller involves the steps of, reducing the number of long blades and adding a medium length splitter blade and a short length splitter blade having varying circumferential distances between any two optimized long blades. Each medium length and short length splitter blade have the same outlet position, profile and thickness as the optimized long blade; however, the medium length and short length splitter blades have different inlet positions relative to the optimized long blade. The long blade, medium length splitter blade and short length splitter blade are arranged in circumferential sequence along the direction of rotation of the impeller. This optimization improves various problems arising from the original semi-open centrifugal pumps, including low efficiency, significant loss at the inlet, inlet cavitation, separation of boundary layers at the blade inlets, narrow lift range of the dead point and excessive noise.