中国大型和特大型天然气透平膨胀机均为进口产品,为促进大型和特大型天然气透平膨胀机国产化，借助某公司超大型LNG装置对特大型天然气透平膨胀机的大流量低压比高效率压缩机、大功率叶轮强度及模态分析、大功率扭矩传递结构、止推力及平衡方案、轴承优化设计等关键技术进行了研究,生产制作了特大型天然气透平膨胀机样机并在工厂内进行模拟性能测试,性能指标达到国内领先水平。研究结果为大型和特大型天然气透平膨胀机重大技术装备国产化打下了坚实基础。

Large and super-large scale natural gas turbo-expanders in China are all imported. Based on the super-large scale LNG project of a company, this study completed the key technologies research on the projects super large scale natural gas turbo-expander such as the high-efficiency compressor with both large flow rate and low pressure ratio, the vibration mode analysis of high-power impeller, the high-power torque transmission structure design, the rotor thrust balance scheme, the bearing development and so on. The company designed and built a prototype of super-large scale natural gas expander-compressor unit based on the research findings. The simulated performance test results of the prototype show that the performance of this expander-compressor unit has reached the top-level achieved in China. This research and development results lay a strong foundation for promoting the locally designed and built major technical equipment such as large and super-large scale natural gas turbo-expanders.