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：US11583949B2

公开(公告)日：2023-02-21

申请号：US17764984

申请日：2020-09-18

Applicant: JIANGSU UNIVERSITY OF SCIENCE AND TECHNOLOGY ,  NANTONG DONGDE STEEL CO., LTD

Inventor： Jiayou Wang ,  Jie Zhu ,  Tianwei Wang ,  Wei Wang ,  Kai Wang ,  Da Jiang ,  Biao Wang ,  Yuqing Jiang ,  Jianjian Pang ,  Luxiao Zhang

IPC: B23K9/28 ,  H02K11/22 ,  H02K5/20 ,  B23K9/16 ,  H02K5/14 ,  H02K7/00 ,  H02K9/19 ,  H02K9/28 ,  H02P6/16

Abstract: A swing/rotating gas metal arc welding torch, include a hollow shaft motor and a feeder panel. An upper extending shaft of the feeder panel penetrates through a brush mechanism, and is fixedly connected to a lower extension shaft of the hollow shaft by means of a coupling, and a lower extending shaft of the feeder panel penetrates through a support bearing mounted in a brush base and is then connected to an eccentric or bent conductive rod mechanism; the motor base is fixedly connected to the brush base by means of connecting screws, and a welding shielding gas is provided and welding torch cooling is achieved by means of inner holes of the connecting screws as well as a built-in gas passage and a cooling water passage of the brush base; the length of the conductive rod mechanism is adjusted by means of modulation or extension and retraction.

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：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.