Hydrodynamic Bearing Structural Design of Blood Pump Based on Axial Passive Suspension Stability Analysis of Magnetic–Hydrodynamic Hybrid Suspension System

Rotor suspension stability is one of the important performance indexes of a blood pump and the basis of determining whether the blood pump can be used in a clinic. Compared with the traditional magnetic suspension system, a single-winding, bearingless motor has the advantages of a compact structure,...

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Autores principales:	Peng Shen, Yiwen Wang, Yun Chen, Pengqiang Fu, Lijie Zhou, Lijia Liu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	blood pump magnetic–hydrodynamic hybrid suspension system passive suspension stability stiffness hydrodynamic bearing Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/df6646dc2bae4f52b1138dc228749ab2
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spelling	oai:doaj.org-article:df6646dc2bae4f52b1138dc228749ab22021-11-25T18:12:03ZHydrodynamic Bearing Structural Design of Blood Pump Based on Axial Passive Suspension Stability Analysis of Magnetic–Hydrodynamic Hybrid Suspension System10.3390/machines91102552075-1702https://doaj.org/article/df6646dc2bae4f52b1138dc228749ab22021-10-01T00:00:00Zhttps://www.mdpi.com/2075-1702/9/11/255https://doaj.org/toc/2075-1702Rotor suspension stability is one of the important performance indexes of a blood pump and the basis of determining whether the blood pump can be used in a clinic. Compared with the traditional magnetic suspension system, a single-winding, bearingless motor has the advantages of a compact structure, simple control system and low power consumption. In this pursuit, the present study aimed to envisage and design the magnetic suspension system coupled with a single-winding bearingless motor and permanent magnet bearings, establish the theoretical models of axial force and electromagnetic torque, and calculate the stiffness of the magnetic suspension system at the equilibrium point. Addressing the problem of the negative axial stiffness of the magnetic suspension system being negative, which leads to the instability of the suspension rotor, the hydrodynamic bearing structure was proposed and designed, and the critical stiffness to realize the stable suspension of the rotor was obtained based on the stability criterion of the rotor dynamics model. The optimal structural parameters of the hydrodynamic bearing are selected by integrating various factors based on the solution of the Reynolds equation and a stiffness analysis. Furthermore, the vibration experiment results proved that the blood pump rotor exhibited a good suspension stability, and the maximum offset under the impact external fluid was no more than 2 μm.Peng ShenYiwen WangYun ChenPengqiang FuLijie ZhouLijia LiuMDPI AGarticleblood pumpmagnetic–hydrodynamic hybrid suspension systempassive suspension stabilitystiffnesshydrodynamic bearingMechanical engineering and machineryTJ1-1570ENMachines, Vol 9, Iss 255, p 255 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	blood pump magnetic–hydrodynamic hybrid suspension system passive suspension stability stiffness hydrodynamic bearing Mechanical engineering and machinery TJ1-1570
spellingShingle	blood pump magnetic–hydrodynamic hybrid suspension system passive suspension stability stiffness hydrodynamic bearing Mechanical engineering and machinery TJ1-1570 Peng Shen Yiwen Wang Yun Chen Pengqiang Fu Lijie Zhou Lijia Liu Hydrodynamic Bearing Structural Design of Blood Pump Based on Axial Passive Suspension Stability Analysis of Magnetic–Hydrodynamic Hybrid Suspension System
description	Rotor suspension stability is one of the important performance indexes of a blood pump and the basis of determining whether the blood pump can be used in a clinic. Compared with the traditional magnetic suspension system, a single-winding, bearingless motor has the advantages of a compact structure, simple control system and low power consumption. In this pursuit, the present study aimed to envisage and design the magnetic suspension system coupled with a single-winding bearingless motor and permanent magnet bearings, establish the theoretical models of axial force and electromagnetic torque, and calculate the stiffness of the magnetic suspension system at the equilibrium point. Addressing the problem of the negative axial stiffness of the magnetic suspension system being negative, which leads to the instability of the suspension rotor, the hydrodynamic bearing structure was proposed and designed, and the critical stiffness to realize the stable suspension of the rotor was obtained based on the stability criterion of the rotor dynamics model. The optimal structural parameters of the hydrodynamic bearing are selected by integrating various factors based on the solution of the Reynolds equation and a stiffness analysis. Furthermore, the vibration experiment results proved that the blood pump rotor exhibited a good suspension stability, and the maximum offset under the impact external fluid was no more than 2 μm.
format	article
author	Peng Shen Yiwen Wang Yun Chen Pengqiang Fu Lijie Zhou Lijia Liu
author_facet	Peng Shen Yiwen Wang Yun Chen Pengqiang Fu Lijie Zhou Lijia Liu
author_sort	Peng Shen
title	Hydrodynamic Bearing Structural Design of Blood Pump Based on Axial Passive Suspension Stability Analysis of Magnetic–Hydrodynamic Hybrid Suspension System
title_short	Hydrodynamic Bearing Structural Design of Blood Pump Based on Axial Passive Suspension Stability Analysis of Magnetic–Hydrodynamic Hybrid Suspension System
title_full	Hydrodynamic Bearing Structural Design of Blood Pump Based on Axial Passive Suspension Stability Analysis of Magnetic–Hydrodynamic Hybrid Suspension System
title_fullStr	Hydrodynamic Bearing Structural Design of Blood Pump Based on Axial Passive Suspension Stability Analysis of Magnetic–Hydrodynamic Hybrid Suspension System
title_full_unstemmed	Hydrodynamic Bearing Structural Design of Blood Pump Based on Axial Passive Suspension Stability Analysis of Magnetic–Hydrodynamic Hybrid Suspension System
title_sort	hydrodynamic bearing structural design of blood pump based on axial passive suspension stability analysis of magnetic–hydrodynamic hybrid suspension system
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/df6646dc2bae4f52b1138dc228749ab2
work_keys_str_mv	AT pengshen hydrodynamicbearingstructuraldesignofbloodpumpbasedonaxialpassivesuspensionstabilityanalysisofmagnetichydrodynamichybridsuspensionsystem AT yiwenwang hydrodynamicbearingstructuraldesignofbloodpumpbasedonaxialpassivesuspensionstabilityanalysisofmagnetichydrodynamichybridsuspensionsystem AT yunchen hydrodynamicbearingstructuraldesignofbloodpumpbasedonaxialpassivesuspensionstabilityanalysisofmagnetichydrodynamichybridsuspensionsystem AT pengqiangfu hydrodynamicbearingstructuraldesignofbloodpumpbasedonaxialpassivesuspensionstabilityanalysisofmagnetichydrodynamichybridsuspensionsystem AT lijiezhou hydrodynamicbearingstructuraldesignofbloodpumpbasedonaxialpassivesuspensionstabilityanalysisofmagnetichydrodynamichybridsuspensionsystem AT lijialiu hydrodynamicbearingstructuraldesignofbloodpumpbasedonaxialpassivesuspensionstabilityanalysisofmagnetichydrodynamichybridsuspensionsystem
_version_	1718411530252320768

Hydrodynamic Bearing Structural Design of Blood Pump Based on Axial Passive Suspension Stability Analysis of Magnetic–Hydrodynamic Hybrid Suspension System

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