...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>トライボロジスト >Oil-Free Bearings and Seals for Centrifugal Hydrogen Compressor
【24h】

Oil-Free Bearings and Seals for Centrifugal Hydrogen Compressor

机译：离心式氢压缩机的无油轴承和密封件

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Deployment of a safe, efficient hyarogen production and delivery infrastructure on a scale that can compete economically with current fuels is needed in order to realize the hydrogen economy. While hydrogen compression technology is crucial to pipeline delivery, positive displacement compressors are costly, have poor reliability and use oil, which contaminates the hydrogen. A completely oil-free, high-speed, efficient centrifugal compressor using 4th generation compliant foil bearings and seals has been designed for hydrogen pipeline delivery. Using 6-12 MW drives operating at speeds to 56,000 rpm, a modular, double entry compressor was configured to deliver 500,000 kg/day at pressures greater than 8 MPa. Each of the two or three multi-stage compressor frames operate above the bending critical speed of the rotating group since speeds are 5 to 7 times faster than conventional compressors. To assure a structurally and economically feasible design, the rotor of each compressor frame spins at the same speed with blade tip velocities near 600 m/s. An iterative aerodynamic/structural/rotordynamic design process was used, including both quasi-three dimensional inviscid internal flow and Computational Fluid Dynamic (CFD) analyses. The flow field was carefully analyzed for areas of excessive diffusion, sudden velocity gradients and flow separation. Excellent correlation between the preliminary design and CFD analysis was obtained. Structural and rotor-bearing system dynamic analyses were also completed to finalize the compressor system configuration. Finite element analysis of the compressor impeller was used to verify structural integrity and fatigue limits for selected materials. Rotor-bearing system analysis was used to define acceptable bearing locations and dynamic coefficients, system critical speeds and dynamic stability. Given the high speeds, supercritical operation, and required reliability, efficiency and freedom from contaminants, compliant foil gas bearings and seals were designed and evaluated. Since hydrogen will be used as the lubricant for the foil bearings, substantially lower power loss than oil lubricated bearings will be experienced and the auxiliary supply or scavenge system is eliminated.
机译：为了实现氢经济，需要部署能够与当前燃料进行经济竞争的规模的安全，有效的氢生产和运输基础设施。尽管氢气压缩技术对于管道输送至关重要，但容积式压缩机价格昂贵，可靠性差且使用会污染氢气的机油。设计了一种完全无油的，高速，高效的离心压缩机，该压缩机使用第四代兼容的箔式轴承和密封件，用于输送氢气管道。使用速度高达56,000 rpm的6-12 MW驱动器，配置了模块化双入口压缩机，可在大于8 MPa的压力下每天输送500,000 kg。由于速度是传统压缩机的5至7倍，因此两个或三个多级压缩机机架中的每一个都在旋转组的弯曲临界速度之上运行。为了确保在结构上和经济上可行的设计，每个压缩机框架的转子均以相同的速度旋转，并且叶尖速度接近600 m / s。使用了迭代的空气动力学/结构/转子动力学设计过程，包括准三维无粘性内部流动和计算流体动力学（CFD）分析。仔细分析了流场中是否存在过度扩散，突然的速度梯度和流分离的区域。初步设计与CFD分析之间具有极好的相关性。还完成了结构和转子轴承系统的动力学分析，以最终确定压缩机系统的配置。压缩机叶轮的有限元分析用于验证所选材料的结构完整性和疲劳极限。转子轴承系统分析用于定义可接受的轴承位置和动态系数，系统临界速度和动态稳定性。考虑到高速，超临界运行以及所需的可靠性，效率和免受污染的影响，设计并评估了柔顺的箔式气体轴承和密封件。由于氢将被用作箔片轴承的润滑剂，因此将遭受比油润滑轴承低得多的功率损耗，并且消除了辅助供应或清除系统。

著录项

  • 来源
    《トライボロジスト》 |2015年第4期|223-223|共1页
  • 作者

  • 作者单位
  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号