A single-structured hybrid gas-magnetic bearing (HGMB) has been proposed for frequent start/stop occasions, which eliminates foil structures or static pressure systems by using the closed magnetic poles of the active magnetic bearing (AMB) as the bushing of the gas bearing. This allows the proposedbearing to realize the functions of both AMB and gas bearing with a single bearing structure. In this paper, the bias currents of AMB, aimed for enhanced load capacity and dynamic characteristics, are omitted to reduce power consumption and heat. The combination of zero-bias AMB and rigid self-acting gas bearing in a single bearing structure is therefore proposed. The rotor orbits of gas bearing, AMB, single-structured HGMB, and single-structured zero-bias HGMB in conditions of varied horizontal and vertical external loads are simulated. The dynamic performances during the run-up processes of AMB, HGMB, and zero-bias HGMB are investigated. The electromagnetic forces of each kind of bearing are compared. Numerical results demonstrate that by applying the single-structured zero-bias HGMB, the power consumption can be significantly reduced in contrast with pure AMB and single-structured HGMB. The reduced load capacity and dynamic characteristics of zero-bias AMB can be compensated by the rigid self-acting gas bearing, making the single-structured zero-bias HGMB an ideal candidate for cryogenic, ultra-high speed as well as frequent start/stop occasions.

中文翻译：

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单结构零偏混合气磁轴承及其转子动力学性能


针对频繁启动/停止的场合，提出了一种单结构混合气磁轴承（HGMB），它利用主动磁轴承（AMB）的闭合磁极作为气体的衬套，消除了箔片结构或静压系统。轴承。这使得所提出的轴承能够通过单个轴承结构实现主动式磁力轴承和气体轴承的功能。在本文中，为了增强负载能力和动态特性，省略了AMB的偏置电流，以减少功耗和热量。因此，建议将零偏磁力轴承和刚性自力式气体轴承组合在单一轴承结构中。对气体轴承、AMB、单结构HGMB和单结构零偏压HGMB在不同水平和垂直外部载荷条件下的转子轨道进行了仿真。研究了 AMB、HGMB 和零偏置 HGMB 的启动过程中的动态性能。比较了各种轴承的电磁力。数值结果表明，与纯AMB和单结构HGMB相比，通过应用单结构零偏置HGMB，可以显着降低功耗。零偏压主动式磁力轴承降低的负载能力和动态特性可以通过刚性自力式气体轴承来补偿，使得单结构零偏压HGMB成为低温、超高速以及频繁启停的理想选择场合。