涡轴发动机测扭装置发展现状及趋势

To further study the torque measuring device of turboshaft engine，the classification，pros and cons of common torque measuring devices and their applicability in turboshaft engine were studied. The basic principle， state-of-the-art， typical application cases and main problems of torque measuring devices commonly used in turboshaft engines were elaborated，and then the core technologies of torque measurement for compact power turbine angle method were analyzed. The feasibility of improving the accuracy of torque measurement methods involving both the structures of changing temperature compensation and torsion angle into axial displacements and the new star-type section structures of the short and thick shaft of power turbine improved from the cylinder/ring section was discussed. From this investigation，it was demonstrated that the star-type section shafts could guarantee to obviously reduce the torsional stiffness under the premise of enough flexural rigidity，so that the precision of torque measuring device of compact high-power turboshaft engine can be improved. The efforts of this study provide the research directions of torque measuring devices for turboshaft engine involving the bend and torsional vibration characteristics of star-type section shafts and the validation of installation adaptability.