【摘要】 提出了可用于指尖密封结构的4种指尖型线,并给出了相应的型线坐标方程。在Ansys有限元分析软件的支持下,建立了4种型线的指尖密封结构有限元数学模型,进行了相应的分析计算。计算结果表明,在规定的参数条件下,抛物线螺线、阿基米德螺线和对数螺线3种型线的指尖密封结构较之渐开线型线的指尖密封结构具有更好的力学性能。这一研究对实际应用中指尖密封型线的选择以及指尖密封技术的深入研究均具有较大的意义。更多还原

【Abstract】 One of the key technologies needed by next generation turbine engine is advanced seal technology. Finger seal is one promising advanced seal; its shape affects its fatigue strength and sealing quality. We studied four curves that define mainly four different shapes of finger seal; parabola, Archimedes’ spiral, logarithm spiral, and evolute. We gave eqs. (1) through (5) as the coordinate equations of the above four curves. Then by means of Ansys FEM (finite element method) analytical software, we found four FEM mathematical models corresponding to the four curves that define finger seal configurations. We found by means of Ansys FEM analytical software that the stress levels for finger seal defined by parabola, Archimedes’ spiral, and logarithm spiral are about the same but are much lower than that for finger seal defined by evolute. Lower stress levels indicate higher fatigue strength and better sealing quality.更多还原