Loading device for aircraft wing large deformation tests

Abstract

The invention belongs to an aircraft strength testing technology, and relates to a loading device under the condition that a wing is largely deformed. The loading device for aircraft wing large deformation tests comprises a frame, an actuator cylinder, rolling wheels, roller wheel supports, starting bolts, a steel cable, guide wheels and a movable bearing beam. One end of the actuator is connected with the bottom of the frame while the other end is connected with the movable bearing beam. Two rolling wheel supports are respectively mounted at two ends of the movable bearing beam, and the bosses of the two rolling wheel supports respectively stretches into chutes in inner side surfaces of two sides, being close to the bosses, of the frame. The four guide wheels and the starting bolt are mounted on the movable bearing beam, two guide wheels are mounted at the top of the frame, after a ring at one end of the steel cable is connected to the starting bolt, the other end of the steel cable penetrates out from the top of the frame after sequentially winding around the guide wheels. The loading device provided by the invention is of an integrated frame structure, is convenient and safe to mount for test, high in control accuracy, and flexible in motion of the movable bearing beam and coordinating when in loading, and can meet the loading requirement on large deformation of the wing.

Description

technical field [0001] The invention belongs to the aircraft strength test technology, and relates to a loading device satisfying the large deformation of the wing. Background technique [0002] During the structural strength test of an aircraft, the wing usually deforms upward. When the deformation of the wing tip exceeds 2500 mm, the existing loading device cannot meet the loading requirements. On the one hand, the maximum stroke of the existing actuator is 2500 mm; on the other hand, so far, the maximum deformation of the wing tip has not exceeded 5000 mm. for large deformation. [0003] Wing load application technology in the case of large deformation is a difficult point in the strength test of aircraft structure. At present, there is no ideal loading device that can easily apply the wing load in this case. At present, the most (most effective) loading method is the method of connecting double actuators in series, such as figure 1 As shown; when the test is loaded, t...

AI Technical Summary

Problems solved by technology

In this loading method, the two actuators are connected in series through a soft type, which is heavy, difficult to lift and install, and not easy to replace; on the other hand, the two loading actuators are controlled by a control module through the load. When the travel of the two actuators is switched, a large impact load will be generated, which will easily lead to the termination of the test protection, the risk of the test, the control is more difficult, and the control accuracy is low; third, under normal circumstances, the distance between the wing and the ground is about 4500 mm , the length of the double-action actuators in series is too long to be installed on the lower surface of the wing, so it can only be changed to upward loading through the steering pulley. Sometimes, individual upward loading points also need to be changed through the steering pulley due to the limited installation space. For downward loading, its mounting strength is considerable

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