摘要
高炉煤气余压透平中的叶片在工作中受到稳态气流力和非稳态气流力的共同作用,工作环境恶劣。为了提高叶片的工作可靠性,减小工作过程中的振动,在叶根部分采用金属橡胶材料作为阻尼材料设计了一种阻尼结构。分别对未加阻尼器的叶片和加装阻尼器的叶片进行了静态、模态和瞬态动力学分析,对计算结果进行了对比分析。结果表明:加装阻尼结构后,叶片的固有频率有所降低,阻尼结构能有效地减少叶片在工作过程中的动应力,而动应力是导致了叶片的损坏的主要原因。所设计的在叶根处的阻尼结构,相对比其它阻尼结构较为简单,加工、安装方便。
The blade of TRT （Blast Furnace Top Gas Recovery Turbine Unit） device is affected by the steady and non-steady aerodynamic force, and the working environment of the blade is very poor. A damper made of metal rubber is designed and installed at the blade root to enhance the reliability and reduce vibration of TRT blade. Undamped blade and the damped blade of TRT are analyzed for their static and dynamic behaviour using ANSYS software, and then the results are comparitively studied. The results show that the natural frequency of the damped blade is decreased and the dynamic stresses of the blade, which is the main factor breaking the blade of TRT are reduced. The proposed damped structure used at blade root is much simpler, and easier to be made than other damper of blade.
出处
《机械科学与技术》
CSCD
北大核心
2011年第12期2029-2035,共7页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(10972179)
陕西高校省级重点实验室科研项目(09JS100)资助
关键词
叶片
阻尼
应力
位移
固有频率
有限元分析
blade
damping
stress
displacement
natural frequency
finite element analysis
