Characterization of a controllable stiffness foil bearing with shape memory alloy springs
Characterization of a controllable stiffness foil bearing with shape memory alloy springs
复制标题
具有形状记忆合金弹簧的可控刚度箔片轴承的表征
DOI：
10.1016/j.triboint.2019.03.068
复制
发表时间：
2019-08-01
影响因子：
6.2
通讯作者：
Guo, Zhiyang
中科院分区：
文献类型：
--
作者：
Feng, Kai;Cao, Yuanlong;Guo, Zhiyang
研制了一种形状记忆合金箔片气体轴承（SMA GFB），该轴承通过电加热和设计的冷却方式控制SMA弹簧的温度，从而调节弹性结构的刚度和转子与箔片之间的间隙。建立了由SMA弹簧组成的主动弹性结构的数学模型，并通过实验验证了主动弹性结构可以改善SMA-GFB的性能。预测了SMA-GFBs的静态和动态特性。基于SMA弹簧的周向分布，研究了两种不同形状SMA-GFB的承载能力和稳定性。这些数据为形状记忆合金在气体轴承中的积极应用拓展了途径。
This paper develops a shape memory alloy gas foil bearing (SMA-GFB), in which the stiffness of elastic structure and the clearance between the rotor and top foil are adjusted by the temperature of SMA springs which is controlled by electric heating and a designed cooling method. A numerical model of elastic structure composed by a series of SMA springs is conducted, and the experimental results verify that the active elastic structure can improve SMA-GFB performance. Furthermore, the static and dynamic characteristics of SMA-GFBs are predicted. The load capacity and stability of two different designs of SMA-GFB are explored based on the circumferential distribution of SMA springs. These data expand the path for the active application of SMA in gas bearings.