摆杆式导叶调节机构的设计与研究

Design and Research of Adjustable Guide Vane Mechanism of Swing Rod Type

为促进变几何涡轮在航空发动机中的广泛应用,提高变几何涡轮的工作效率,设计了一种用于变几何涡轮的摆杆式导叶调节机构。采用Adams软件对导叶调节机构进行了运动学仿真研究,仿真结果验证了调节机构设计的可行性,通过仿真发现这样的导叶调节机构至少需采用3个作动筒同时驱动才能保证涡轮调节的精度要求。在Adams中对机构进行了参数化建模,利用参数化模型分析了尺寸误差和间隙对导叶转动精度的影响,并且以前十次仿真为例计算了调节机构导叶角度重复位置精度的可靠度。研究结果表明设计的导叶调节机构结构合理、可靠性高。

In order to promote the wide application of variable-geometry turbine in aero-engine and improve the working efficiency of variable-geometry turbine, a swinging rod guide vane regulating mechanism for variable-geometry turbine was designed. The kinetics simulation of the guide vane adjustment mechanism was carried out by Adams. The simulation results verified the feasibility of the design of the adjustment mechanism. It was found through simulation that such a guide vane adjustment mechanism needs to be driven by at least three actuators to ensure the accuracy of the turbine adjustment. Parametric modeling of the mechanism was carried out in Adams. The parametric model was used to analyze the influence of dimensional error and clearance on the rotation precision of the guide vane. The previous ten simulations were used as examples to calculate the reliability of the adjustment position of the guide vane angle. The results show that the designed guide vane regulating mechanism has reasonable and high reliability.