| 方启波， 罗一平.工作过程中磁流变液热量产生机理及其影响[J].轻工机械,2022,40(5):1-7 |
| 工作过程中磁流变液热量产生机理及其影响 |
| Mechanism and Influence of Heat Generation in Magnetorheological Fluid During Working |
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| DOI：10.3969/j.issn.1005 2895.2022.05.001 |
| 中文关键词: 磁流变液 热量 温升 黏度 剪切应力 |
| 英文关键词:magnetorheological fluid heat temperature rise viscosity shear stress |
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| 中文摘要: |
| 在磁流变液工作过程中不可避免会产生热量，使工作温度升高并影响磁流变液相关性能。笔者从电磁、摩擦和磁热效应等方面综述了磁流变液工作过程中热量产生机理，并且阐述了工作环境温度升高后对磁流变液各组成成分、黏度和剪切应力等主要特性的影响。温度的升高不仅会使磁流变液各成分发生相应变化，也会使黏度和剪切应力减小，导致磁流变液性能降低甚至发生不可逆变性。因此笔者认为：为了有效延长磁流变液使用寿命，一方面可以优化磁流变液配方，配制出具有良好温度适应能力的磁流变液，另一方面可以通过建立包含温度参数的剪切屈服应力模型来预测磁流变液性能随温度变化情况，从而更加精确控制磁流变液工作温度；当温度大幅上升不可避免时，应及时采取冷却措施。 |
| 英文摘要: |
| Heat is inevitably generated in the working process of the magnetorheological fluid, which increases the working temperature and affects the related properties of the magnetorheological fluid. The mechanism of heat generation in the working process of magnetorheological fluids was reviewed from the aspects of electromagnetism, friction and magnetocaloric effect. And the influence of the working environment temperature on the main properties such as the composition, viscosity and shear stress of the magnetorheological fluid was expounded. The increase of temperature will not only cause corresponding changes in the components of the magnetorheological fluid, but also decrease the viscosity and shear stress, leading to the reduction of the performance of magnetorheological fluids and even irreversible degeneration. In order to effectively prolong the service life of magnetorheological fluid, on the one hand, the formulation of magnetorheological fluid can be optimized to formulate the magnetorheological fluid with good temperature adaptability; and on the other hand, the change of the properties of magnetorheological fluids with temperature can be predicted by establishing a shear yield stress model including temperature parameters, thus to control the working temperature of the magnetorheological fluid more precisely. When a significant temperature rise is unavoidable, cooling measures should be taken in time. |
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