Identification of Dynamic Force Coefficients for an Additively Manufactured Hermetic Squeeze Film Bearing Support Damper Utilizing a Pass-Through Channel

IF 1.4 4区 工程技术 Q3 ENGINEERING, MECHANICAL Journal of Engineering for Gas Turbines and Power-transactions of The Asme Pub Date : 2023-10-14 DOI:10.1115/1.4063781
Bugra Ertas, Keith Gary, Thomas Adcock
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Abstract

Abstract The following paper presents breakthrough experimental results for a new hermetic squeeze film damper (HSFD) concept that is integrally designed within an externally pressurized tilting-pad radial gas bearing support. The flexibly damped gas bearing module was designed for a 7.2" (183 mm) diameter shaft and fabricated using direct metal laser melting (DMLM); also known as additive manufacturing. The bearing and HSFD were sized based on ongoing studies for oil-free super-critical carbon dioxide (sCO2) power turbines in the 8.5MW-10MW power range. The development of the new damper concept was motivated by past dynamic testing on HSFD, which generated frequency dependent stiffness and damping force coefficients. In efforts to eliminate the frequency dependency, a new HSFD architecture was conceived that adds accumulator volumes and a pass-through channel to previously conceived HSFD flow network designs. The other motivation of the work is the need for developing a cost-effective and reliable oil-free bearing technology that is scalable to large power turbomachinery applications. There were several objectives to the following work. The first objective was to successfully design and fabricate a single piece bearing-damper using additive manufacturing, while dimensionally controlling critical design features. The paper discusses the manufacturing steps and shows cut-ups that reveal adequate clearance control capability with internal damper clearances.
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采用直通通道的增材制造密封挤压膜轴承支撑阻尼器的动力系数辨识
摘要:本文介绍了一种新的密封挤压膜阻尼器(HSFD)概念的突破性实验结果,该概念集成在外部加压倾斜垫径向气体轴承支撑中。柔性阻尼气体轴承模块设计用于直径为7.2英寸(183毫米)的轴,并使用直接金属激光熔化(DMLM)制造;也称为增材制造。轴承和HSFD的尺寸基于正在进行的无油超临界二氧化碳(sCO2)动力涡轮机的研究,功率范围为8.5MW-10MW。新减振器概念的发展是由过去在HSFD上进行的动态测试所激发的,这些测试产生了频率相关的刚度和阻尼力系数。为了消除频率依赖性,设计人员设计了一种新的HSFD架构,在原有HSFD流网络设计的基础上增加了蓄能器体积和直通通道。这项工作的另一个动机是需要开发一种具有成本效益且可靠的无油轴承技术,该技术可扩展到大功率涡轮机械应用。接下来的工作有几个目标。第一个目标是使用增材制造成功地设计和制造单个轴承阻尼器,同时尺寸控制关键设计特征。本文讨论了制造步骤,并展示了切割显示足够的间隙控制能力与内部阻尼器的间隙。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.80
自引率
20.00%
发文量
292
审稿时长
2.0 months
期刊介绍: The ASME Journal of Engineering for Gas Turbines and Power publishes archival-quality papers in the areas of gas and steam turbine technology, nuclear engineering, internal combustion engines, and fossil power generation. It covers a broad spectrum of practical topics of interest to industry. Subject areas covered include: thermodynamics; fluid mechanics; heat transfer; and modeling; propulsion and power generation components and systems; combustion, fuels, and emissions; nuclear reactor systems and components; thermal hydraulics; heat exchangers; nuclear fuel technology and waste management; I. C. engines for marine, rail, and power generation; steam and hydro power generation; advanced cycles for fossil energy generation; pollution control and environmental effects.
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