Design And Performance Analysis Of A Torque Limiter For A Certain Aircraft Flap Actuation Line

Torque limiter is an important mechanical transmission device on the wing actuation line of the high-lift system of a large aircraft.When the airplane is flying in a complex and harsh environment,the lever assembly on the flap actuation line may be affected by the actuation line.The jamming fault is subject to a large impact load,which causes the load transmitted from the PDU to the downstream flap actuation line to exceed the strength design value of the lever assembly,which in turn damages the system and the aircraft structure,and fails to complete the retractable and unfoldable mission of the aircraft flaps.This paper aims to improve the adaptability of the flap lever assembly.When the flap actuation line jams,the torque limiter acting as overload protection on the flap actuation line can effectively protect the mechanical structure of the flap lever assembly.This article first analyzes its working principle according to the company’s technical requirements for the flap actuating line torque limiter.And based on the working principle of the flap actuation line torque limiter,the overall design of the torque limiter is carried out.Then by analyzing the force of the steel ball of the key force transmission member,the key parameters of the key components in the flap actuation line torque limiter were determined,and the strength of the three-dimensional solid model of the key components created by CATIA was checked.Secondly,use ANSYS Workbench software to perform structural static finite element analysis on the key components of the flap actuation line torque limiter,focusing on the analysis and study of the distribution area of the maximum stress and deformation of the key components.And by analyzing the numerical simulation results of the structure field,the rationality of the structural design of the torque limiter of the flap actuation line is verified.Thirdly,analyze the ball socket angle of the left/right fairway disk,the distance from the geometric center of the ball socket to the axis of rotation of the left/right fairway disk,the diameter of the steel ball,and the initial axial clearance of the left and right fairway disk to the steel ball and fairway disk structure field.Then,the Taguchi method is used to optimize the design of the four structural parameters that affect the structure field of the steel ball and the fairway disk,and the reasonable structural parameter values for the steel ball and the fairway disk are obtained: the ball socket angle was 35°,the geometric distance is 15.5mm,the steel ball diameter is 7mm,and the initial axial clearance is 1.8mm.After that,the optimized steel ball and fairway disk were analyzed and verified by structural field simulation,and after quality inspection,it was found that the weight of the optimized flap actuation line torque limiter was reduced by 1.2g.Finally,use ADAMS software to conduct dynamic simulation analysis of the optimized flap actuation line torque limiter,and verify the feasibility and performance reliability of the torque limiter by analyzing and researching the simulation results of the torque limiter under two working conditions.