重庆理工大学学报2025，Vol.39Issue(7)：67-75,9.DOI:10.3969/j.issn.1674-8425(z).2025.04.009
电磁-永磁混合驱动式磁流体密封结构设计及实验
Structural design and experimental verification of electromagnetic permanent magnet hybrid-driven magnetic fluid seals
摘要
Abstract
Magnetic fluid sealing represents a cutting-edge technology in sealing.A growing demand for diversified sealing media in industrial applications sets higher requirements for the pressure resistance of magnetic fluid sealing structures.The improvement of pressure resistance performance relies heavily on structural innovation.A well-designed seal structure enhances the sealing effect,ensuring better durability and efficiency in industrial settings. Traditional magnetic fluid sealing structures rely on a single permanent magnet for magnetic field generation.However,this approach presents several challenges.Controlling the strength of the magnetic field remains difficult,and high-performance materials are necessary to maintain its effectiveness.The permanent magnet's magnetic force diminishes over time due to demagnetization,leading to a gradual weakening of the sealing effect.Additionally,using a single electromagnet for magnetic field generation introduces further limitations.When energized,the electromagnet effectively confines the magnetic fluid,achieving the desired sealing effect.However,once the power supply is interrupted,the magnetic field disappears,the confinement of the magnetic fluid fails and leakage occurs.The reliance on either a permanent magnet or an electromagnet alone results in structural deficiencies that negatively impact sealing performances. To address these issues,a hybrid electromagnetic-permanent magnet-driven magnetic fluid sealing structure is proposed.This structure integrates the advantages of both permanent magnets and electromagnets,enhancing sealing performance and pressure resistance.The magnetic field generated by the permanent magnets ensures continuous sealing even when the power supply is off,preventing fluid overflow.When power is supplied,the additional magnetic force from the electromagnet strengthens the sealing capacity,further increasing the pressure resistance of the system.This dynamic interaction between permanent magnets and electromagnets optimizes sealing efficiency and reliability. A comparative analysis of magnetic field strength distribution and magnetic induction intensity between the hybrid structure and traditional designs provides critical insights into performance differences.Magnetic field finite element analysis quantifies the effectiveness of each structure,allowing for an accurate evaluation of pressure resistance capacity.Theoretical calculations using the pressure resistance formula confirm that the hybrid sealing structure achieves markedly higher pressure resistance compared to conventional designs.The improved distribution of the magnetic field ensures a more stable and durable sealing effect,reducing the risk of leakage and structural failure. The experimental validation further supports our findings.A pressure-resistant testing platform evaluates the performance of both the hybrid and traditional magnetic fluid sealing structures.Test results indicate the hybrid electromagnetic-permanent magnet-driven sealing structure withstands a sealing pressure of 1.7 MPa,whereas the traditional design only achieves a pressure resistance of 1.0 MPa.This represents a 70％ increase in pressure resistance,demonstrating the effectiveness of the hybrid design.The combination of permanent magnets and electromagnets enhances sealing durability,making the structure suitable for applications requiring high-pressure resistance. These findings offer valuable insights for the continued development of magnetic fluid sealing technology.The hybrid structure addresses the limitations of traditional designs,offering a practical and effective solution for industrial sealing applications.Further research and optimization of hybrid magnetic fluid sealing structures may further enhance their applicability,ensuring improved performance in a wide range of operation conditions.关键词
通电线圈/永磁体/磁流体/磁场分析Key words
energized coils/permanent magnets/magnetic fluid/magnetic field analysis分类
机械制造引用本文复制引用
张健,张佳慧,陈晚,付己峰,王靖萱..电磁-永磁混合驱动式磁流体密封结构设计及实验[J].重庆理工大学学报,2025,39(7):67-75,9.基金项目
黑龙江省重点研发计划项目(2023ZX03A01) （2023ZX03A01）
国家自然科学基金项目(51805108) （51805108）
黑龙江省重点研发计划项目(GZ20220097) （GZ20220097）
哈尔滨市制造业科技创新人才项目(CXRC20221104079) （CXRC20221104079）
中央高校基本科研业务费专项资金资助项目(2572022BF02) （2572022BF02）
