Design and analysis of the support structure of flow-channel type axial-flow blood pump(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2021年第6期
- Page:
- 732-736
- Research Field:
- 医学信号处理与医学仪器
- Publishing date:
Info
- Title:
- Design and analysis of the support structure of flow-channel type axial-flow blood pump
- Author(s):
- LI Zipeng1; TANG Xiaoyan2; YUN Zhong2; FENG Longfei2
- 1. Light Alloy Research Institute, Central South University, Changsha 410083, China 2. School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
- Keywords:
- Keywords: blood pump flow channel magnetic fluid suspension magnetic force hydraulic force
- PACS:
- R318；TH312
- DOI:
- DOI:10.3969/j.issn.1005-202X.2021.06.014
- Abstract:
- Abstract: Objective To alleviate the problems of electromagnetic bearings (complex structure, large volume) and hydraulic bearings (small bearing capacity, no longer able to work under large loads), a flow-channel type magnetic fluid suspension axial-flow blood pump is proposed to improve the bearing capacity of blood pump. Methods The flow-channel type axial-flow blood pump was supported by permanent magnetic force in the axial direction, and the hydraulic suspension generated by the flow channel structure of the rotor impeller was used in the radial direction. The axial transient magnetic field was simulated by Ansys for studying the changes of magnetic forces, and Fluent was used to simulate radial hydraulic forces with different slotting directions, angles and depths, thereby investigating the changes of hydraulic forces. Results The analysis on the changes of axial magnetic forces with displacements revealed that the proposed blood pump had the most excellent performance, when the maximum magnetic force, the inclination angle of the wedge-shaped slotted structure, the number of slots, the depth of the slot and the tip clearance were 2.9 N, 28°, 5, 0.36 mm and 0.40 mm, respectively, meeting the requirements of application in human body. Conclusion The flow-channel type axial-flow blood pump has higher bearing capacity and better suspension performances than the ordinary magnetic fluid suspension blood pump, which provides a new idea for the optimization of axial-flow blood pump.
Last Update: 2021-06-29