Operation of an Electromagnetic Eddy-Current Damper with a Supercritical Shaft
Operation of an Electromagnetic Eddy-Current Damper with a Supercritical Shaft
复制标题
超临界轴电磁涡流阻尼器的运行
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
M. Darlow
中科院分区：
文献类型：
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作者：
J. R. Frederick;M. Darlow
超临界轴系运行的一个基本问题是应用适当的外部阻尼，这通常是必要的，以抑制非同步不稳定性和限制同步响应，即使是平衡良好的轴。通常，使用库仑或挤压膜型阻尼器，在这种情况下，阻尼特性往往会随温度而变化，并且必要的接触会导致额外的扭矩载荷和磨损。目前正在研究的另一种阻尼方法是应用非接触式电磁阻尼器，该阻尼器通过安装在轴上并随轴旋转的小圆盘中产生的感应涡流来耗散能量（Frederick，1990）。这种类型的阻尼器的设计和开发研究正在进行中，最终可能会应用于主动控制应用。本研究的目的是初步设计的磁路，一个适当的直流电源，和表征的初步性能实验的复合轴。阻尼器的操作进行了评估，在旋转轴的测试，并与以前的测试，其中涉及使用永磁涡流阻尼器。本说明涉及从这些初步试验中获得的一些有趣的结果。阻尼器在低速时工作良好，但遇到了一些高速稳定性问题。这些问题的潜在解决方案以及未来的研究领域进行了讨论。
A basic problem inherent with the operation of supercritical shafting is the application of appropriate external damping, which is generally necessary to suppress nonsynchronous instabilities and limit the synchronous response of even a well-balanced shaft. Typically, coulomb or squeeze film-type dampers are used, in which case the damping properties tend to change with temperature, and the necessary contact results in additional torque loading and wear. An alternative damping method currently under investigation is the application of a noncontact electromagnetic damper that dissipates energy through induced eddy-currents generated in a small disk mounted to, and rotating with the shaft (Frederick, 1990). Research is underway on the design and development of a damper of this type that could eventually lend itself to active control applications. The objectives of this investigation are the initial design of a magnetic circuit, an appropriate d-c power supply, and the characterization of preliminary performance experiments on a composite shaft. Damper operation was evaluated during rotating shaft tests and compared to prior tests which involved the use of a permanent magnet eddy-current damper. This Note concerns some interesting results obtained from these preliminary tests. The damper worked well at low speeds, but some high-speed stability problems were encountered. Potential solutions to these problems as well as areas of future research are discussed.