公开(公告)号：US11525454B2

公开(公告)日：2022-12-13

申请号：US16669276

申请日：2019-10-30

Applicant: Jiangsu University

Inventor： Houlin Liu ,  Kaikai Luo ,  Zilong Zhang ,  Yong Wang ,  Kai Wang ,  Liang Dong ,  Minggao Tan

IPC: F04D29/30 ,  F04D29/24 ,  F04D7/04 ,  F04D29/22

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.

公开(公告)号：US20200088208A1

公开(公告)日：2020-03-19

申请号：US16669276

申请日：2019-10-30

Applicant: Jiangsu University

Inventor： Houlin Liu ,  Kaikai Luo ,  Zilong Zhang ,  Yong Wang ,  Kai Wang ,  Liang Dong ,  Minggao Tan

IPC: F04D29/24 ,  F04D29/30

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.

公开(公告)号：US11199265B2

公开(公告)日：2021-12-14

申请号：US16466900

申请日：2018-06-13

Applicant: JIANGSU UNIVERSITY ,  INSTITUTE OF FLUID ENGINEERING EQUIPMENT, JITRI

Inventor： Houlin Liu ,  Zilong Zhang ,  Kaikai Luo ,  Yong Wang ,  Kai Wang ,  Liang Dong ,  Minggao Tan

IPC: F16J15/43 ,  F16L51/00 ,  F16L27/12

Abstract: A pipe connection compensation device by magnetic fluid sealing comprising a compensation pipe, sealed end cap, coil, annular permanent magnet and tightening rod is provided, designed and configured in a novel manner to ensure the pipe connection compensation device by magnetic fluid sealing achieves a better sealing effect.